Merge tag 'arc-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC architecture updates from Vineet Gupta:
- support for HS38 cores based on ARCv2 ISA
ARCv2 is the next generation ISA from Synopsys and basis for the
HS3{4,6,8} families of processors which retain the traditional ARC mantra of
low power and configurability and are now more performant and feature rich.
HS38x is a 10 stage pipeline core which supports MMU (with huge pages) and
SMP (upto 4 cores) among other features.
+ www.synopsys.com/dw/ipdir.php?ds=arc-hs38-processor
+ http://news.synopsys.com/2014-10-14-New-DesignWare-ARC-HS38-Processor-Doubles-Performance-for-Embedded-Linux-Applications
+ http://www.embedded.com/electronics-news/4435975/Synopsys-ARC-HS38-core-gives-2X-boost-to-Linux-based-apps
- support for ARC SDP (Software Development platform): Main Board + CPU Cards
= AXS101: CPU Card with ARC700 in silicon @ 700 MHz
= AXS103: CPU Card with HS38x in FPGA
- refactoring of ARCompact port to accomodate new ARCv2 ISA
- misc updates/cleanups
* tag 'arc-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: (72 commits)
ARC: Fix build failures for ARCompact in linux-next after ARCv2 support
ARCv2: Allow older gcc to cope with new regime of ARCv2/ARCompact support
ARCv2: [vdk] dts files and defconfig for HS38 VDK
ARCv2: [axs103] Support ARC SDP FPGA platform for HS38x cores
ARC: [axs101] Prepare for AXS103
ARCv2: [nsim*hs*] Support simulation platforms for HS38x cores
ARCv2: All bits in place, allow ARCv2 builds
ARCv2: SLC: Handle explcit flush for DMA ops (w/o IO-coherency)
ARCv2: STAR 9000837815 workaround hardware exclusive transactions livelock
ARC: Reduce bitops lines of code using macros
ARCv2: barriers
arch: conditionally define smp_{mb,rmb,wmb}
ARC: add smp barriers around atomics per Documentation/atomic_ops.txt
ARC: add compiler barrier to LLSC based cmpxchg
ARCv2: SMP: intc: IDU 2nd level intc for dynamic IRQ distribution
ARCv2: SMP: clocksource: Enable Global Real Time counter
ARCv2: SMP: ARConnect debug/robustness
ARCv2: SMP: Support ARConnect (MCIP) for Inter-Core-Interrupts et al
ARC: make plat_smp_ops weak to allow over-rides
ARCv2: clocksource: Introduce 64bit local RTC counter
...
diff --git a/Documentation/devicetree/bindings/arc/archs-idu-intc.txt b/Documentation/devicetree/bindings/arc/archs-idu-intc.txt
new file mode 100644
index 0000000..0dcb7c7
--- /dev/null
+++ b/Documentation/devicetree/bindings/arc/archs-idu-intc.txt
@@ -0,0 +1,46 @@
+* ARC-HS Interrupt Distribution Unit
+
+ This optional 2nd level interrupt controller can be used in SMP configurations for
+ dynamic IRQ routing, load balancing of common/external IRQs towards core intc.
+
+Properties:
+
+- compatible: "snps,archs-idu-intc"
+- interrupt-controller: This is an interrupt controller.
+- interrupt-parent: <reference to parent core intc>
+- #interrupt-cells: Must be <2>.
+- interrupts: <...> specifies the upstream core irqs
+
+ First cell specifies the "common" IRQ from peripheral to IDU
+ Second cell specifies the irq distribution mode to cores
+ 0=Round Robin; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
+
+ intc accessed via the special ARC AUX register interface, hence "reg" property
+ is not specified.
+
+Example:
+ core_intc: core-interrupt-controller {
+ compatible = "snps,archs-intc";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+
+ idu_intc: idu-interrupt-controller {
+ compatible = "snps,archs-idu-intc";
+ interrupt-controller;
+ interrupt-parent = <&core_intc>;
+
+ /*
+ * <hwirq distribution>
+ * distribution: 0=RR; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
+ */
+ #interrupt-cells = <2>;
+
+ /* upstream core irqs: downstream these are "COMMON" irq 0,1.. */
+ interrupts = <24 25 26 27 28 29 30 31>;
+ };
+
+ some_device: serial@c0fc1000 {
+ interrupt-parent = <&idu_intc>;
+ interrupts = <0 0>; /* upstream idu IRQ #24, Round Robin */
+ };
diff --git a/Documentation/devicetree/bindings/arc/archs-intc.txt b/Documentation/devicetree/bindings/arc/archs-intc.txt
new file mode 100644
index 0000000..69f326d
--- /dev/null
+++ b/Documentation/devicetree/bindings/arc/archs-intc.txt
@@ -0,0 +1,22 @@
+* ARC-HS incore Interrupt Controller (Provided by cores implementing ARCv2 ISA)
+
+Properties:
+
+- compatible: "snps,archs-intc"
+- interrupt-controller: This is an interrupt controller.
+- #interrupt-cells: Must be <1>.
+
+ Single Cell "interrupts" property of a device specifies the IRQ number
+ between 16 to 256
+
+ intc accessed via the special ARC AUX register interface, hence "reg" property
+ is not specified.
+
+Example:
+
+ intc: interrupt-controller {
+ compatible = "snps,archs-intc";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ interrupts = <16 17 18 19 20 21 22 23 24 25>;
+ };
diff --git a/Documentation/devicetree/bindings/arc/axs101.txt b/Documentation/devicetree/bindings/arc/axs101.txt
new file mode 100644
index 0000000..48290d5
--- /dev/null
+++ b/Documentation/devicetree/bindings/arc/axs101.txt
@@ -0,0 +1,7 @@
+Synopsys DesignWare ARC Software Development Platforms Device Tree Bindings
+---------------------------------------------------------------------------
+
+SDP Main Board with an AXC001 CPU Card hoisting ARC700 core in silicon
+
+Required root node properties:
+ - compatible = "snps,axs101", "snps,arc-sdp";
diff --git a/Documentation/devicetree/bindings/arc/axs103.txt b/Documentation/devicetree/bindings/arc/axs103.txt
new file mode 100644
index 0000000..6eea862
--- /dev/null
+++ b/Documentation/devicetree/bindings/arc/axs103.txt
@@ -0,0 +1,8 @@
+Synopsys DesignWare ARC Software Development Platforms Device Tree Bindings
+---------------------------------------------------------------------------
+
+SDP Main Board with an AXC003 FPGA Card which can contain various flavours of
+HS38x cores.
+
+Required root node properties:
+ - compatible = "snps,axs103", "snps,arc-sdp";
diff --git a/MAINTAINERS b/MAINTAINERS
index 0e6b091..ab6fb58 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9832,6 +9832,13 @@
F: Documentation/devicetree/bindings/arc/
F: drivers/tty/serial/arc_uart.c
+SYNOPSYS ARC SDP platform support
+M: Alexey Brodkin <abrodkin@synopsys.com>
+S: Supported
+F: arch/arc/plat-axs10x
+F: arch/arc/boot/dts/ax*
+F: Documentation/devicetree/bindings/arc/axs10*
+
SYSTEM CONFIGURATION (SYSCON)
M: Lee Jones <lee.jones@linaro.org>
M: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index df94ac1..e7cee0a 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -81,17 +81,37 @@
menu "ARC Platform/SoC/Board"
-source "arch/arc/plat-arcfpga/Kconfig"
+source "arch/arc/plat-sim/Kconfig"
source "arch/arc/plat-tb10x/Kconfig"
+source "arch/arc/plat-axs10x/Kconfig"
#New platform adds here
endmenu
+choice
+ prompt "ARC Instruction Set"
+ default ISA_ARCOMPACT
+
+config ISA_ARCOMPACT
+ bool "ARCompact ISA"
+ help
+ The original ARC ISA of ARC600/700 cores
+
+config ISA_ARCV2
+ bool "ARC ISA v2"
+ help
+ ISA for the Next Generation ARC-HS cores
+
+endchoice
+
menu "ARC CPU Configuration"
choice
prompt "ARC Core"
- default ARC_CPU_770
+ default ARC_CPU_770 if ISA_ARCOMPACT
+ default ARC_CPU_HS if ISA_ARCV2
+
+if ISA_ARCOMPACT
config ARC_CPU_750D
bool "ARC750D"
@@ -100,7 +120,7 @@
config ARC_CPU_770
bool "ARC770"
- select ARC_CPU_REL_4_10
+ select ARC_HAS_SWAPE
help
Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
This core has a bunch of cool new features:
@@ -109,6 +129,27 @@
-Caches: New Prog Model, Region Flush
-Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
+endif #ISA_ARCOMPACT
+
+config ARC_CPU_HS
+ bool "ARC-HS"
+ depends on ISA_ARCV2
+ help
+ Support for ARC HS38x Cores based on ARCv2 ISA
+ The notable features are:
+ - SMP configurations of upto 4 core with coherency
+ - Optional L2 Cache and IO-Coherency
+ - Revised Interrupt Architecture (multiple priorites, reg banks,
+ auto stack switch, auto regfile save/restore)
+ - MMUv4 (PIPT dcache, Huge Pages)
+ - Instructions for
+ * 64bit load/store: LDD, STD
+ * Hardware assisted divide/remainder: DIV, REM
+ * Function prologue/epilogue: ENTER_S, LEAVE_S
+ * IRQ enable/disable: CLRI, SETI
+ * pop count: FFS, FLS
+ * SETcc, BMSKN, XBFU...
+
endchoice
config CPU_BIG_ENDIAN
@@ -117,17 +158,13 @@
help
Build kernel for Big Endian Mode of ARC CPU
-# If a platform can't work with 0x8000_0000 based dma_addr_t
-config ARC_PLAT_NEEDS_CPU_TO_DMA
- bool
-
config SMP
- bool "Symmetric Multi-Processing (Incomplete)"
+ bool "Symmetric Multi-Processing"
default n
+ select ARC_HAS_COH_CACHES if ISA_ARCV2
+ select ARC_MCIP if ISA_ARCV2
help
- This enables support for systems with more than one CPU. If you have
- a system with only one CPU, say N. If you have a system with more
- than one CPU, say Y.
+ This enables support for systems with more than one CPU.
if SMP
@@ -137,13 +174,20 @@
config ARC_HAS_REENTRANT_IRQ_LV2
def_bool n
-endif
+config ARC_MCIP
+ bool "ARConnect Multicore IP (MCIP) Support "
+ depends on ISA_ARCV2
+ help
+ This IP block enables SMP in ARC-HS38 cores.
+ It provides for cross-core interrupts, multi-core debug
+ hardware semaphores, shared memory,....
config NR_CPUS
int "Maximum number of CPUs (2-4096)"
range 2 4096
- depends on SMP
- default "2"
+ default "4"
+
+endif #SMP
menuconfig ARC_CACHE
bool "Enable Cache Support"
@@ -185,7 +229,7 @@
config ARC_CACHE_VIPT_ALIASING
bool "Support VIPT Aliasing D$"
- depends on ARC_HAS_DCACHE
+ depends on ARC_HAS_DCACHE && ISA_ARCOMPACT
default n
endif #ARC_CACHE
@@ -226,9 +270,10 @@
Multipler. Otherwise software multipy lib is used
choice
- prompt "ARC700 MMU Version"
+ prompt "MMU Version"
default ARC_MMU_V3 if ARC_CPU_770
default ARC_MMU_V2 if ARC_CPU_750D
+ default ARC_MMU_V4 if ARC_CPU_HS
config ARC_MMU_V1
bool "MMU v1"
@@ -249,6 +294,10 @@
Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
Shared Address Spaces (SASID)
+config ARC_MMU_V4
+ bool "MMU v4"
+ depends on ISA_ARCV2
+
endchoice
@@ -271,6 +320,8 @@
endchoice
+if ISA_ARCOMPACT
+
config ARC_COMPACT_IRQ_LEVELS
bool "ARCompact IRQ Priorities: High(2)/Low(1)"
default n
@@ -290,7 +341,7 @@
config ARC_IRQ6_LV2
bool
-endif
+endif #ARC_COMPACT_IRQ_LEVELS
config ARC_FPU_SAVE_RESTORE
bool "Enable FPU state persistence across context switch"
@@ -303,32 +354,53 @@
based on actual usage of FPU by a task. Thus our implemn does
this for all tasks in system.
+endif #ISA_ARCOMPACT
+
config ARC_CANT_LLSC
def_bool n
-menuconfig ARC_CPU_REL_4_10
- bool "Enable support for Rel 4.10 features"
- default n
- help
- -ARC770 (and dependent features) enabled
- -ARC750 also shares some of the new features with 770
-
config ARC_HAS_LLSC
bool "Insn: LLOCK/SCOND (efficient atomic ops)"
default y
- depends on ARC_CPU_770 && !ARC_CANT_LLSC
+ depends on !ARC_CPU_750D && !ARC_CANT_LLSC
config ARC_HAS_SWAPE
bool "Insn: SWAPE (endian-swap)"
default y
- depends on ARC_CPU_REL_4_10
-config ARC_HAS_RTSC
- bool "Insn: RTSC (64-bit r/o cycle counter)"
+if ISA_ARCV2
+
+config ARC_HAS_LL64
+ bool "Insn: 64bit LDD/STD"
+ help
+ Enable gcc to generate 64-bit load/store instructions
+ ISA mandates even/odd registers to allow encoding of two
+ dest operands with 2 possible source operands.
default y
- depends on ARC_CPU_REL_4_10
+
+config ARC_HAS_RTC
+ bool "Local 64-bit r/o cycle counter"
+ default n
depends on !SMP
+config ARC_HAS_GRTC
+ bool "SMP synchronized 64-bit cycle counter"
+ default y
+ depends on SMP
+
+config ARC_NUMBER_OF_INTERRUPTS
+ int "Number of interrupts"
+ range 8 240
+ default 32
+ help
+ This defines the number of interrupts on the ARCv2HS core.
+ It affects the size of vector table.
+ The initial 8 IRQs are fixed (Timer, ICI etc) and although configurable
+ in hardware, it keep things simple for Linux to assume they are always
+ present.
+
+endif # ISA_ARCV2
+
endmenu # "ARC CPU Configuration"
config LINUX_LINK_BASE
@@ -354,8 +426,10 @@
config ARC_EMUL_UNALIGNED
bool "Emulate unaligned memory access (userspace only)"
+ default N
select SYSCTL_ARCH_UNALIGN_NO_WARN
select SYSCTL_ARCH_UNALIGN_ALLOW
+ depends on ISA_ARCOMPACT
help
This enables misaligned 16 & 32 bit memory access from user space.
Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
@@ -378,9 +452,10 @@
bool "ARC debugging"
default y
+if ARC_DBG
+
config ARC_DW2_UNWIND
bool "Enable DWARF specific kernel stack unwind"
- depends on ARC_DBG
default y
select KALLSYMS
help
@@ -394,18 +469,38 @@
config ARC_DBG_TLB_PARANOIA
bool "Paranoia Checks in Low Level TLB Handlers"
- depends on ARC_DBG
default n
config ARC_DBG_TLB_MISS_COUNT
bool "Profile TLB Misses"
default n
select DEBUG_FS
- depends on ARC_DBG
help
Counts number of I and D TLB Misses and exports them via Debugfs
The counters can be cleared via Debugfs as well
+if SMP
+
+config ARC_IPI_DBG
+ bool "Debug Inter Core interrupts"
+ default n
+
+endif
+
+endif
+
+config ARC_UBOOT_SUPPORT
+ bool "Support uboot arg Handling"
+ default n
+ help
+ ARC Linux by default checks for uboot provided args as pointers to
+ external cmdline or DTB. This however breaks in absence of uboot,
+ when booting from Metaware debugger directly, as the registers are
+ not zeroed out on reset by mdb and/or ARCv2 based cores. The bogus
+ registers look like uboot args to kernel which then chokes.
+ So only enable the uboot arg checking/processing if users are sure
+ of uboot being in play.
+
config ARC_BUILTIN_DTB_NAME
string "Built in DTB"
help
diff --git a/arch/arc/Makefile b/arch/arc/Makefile
index db72fec..6107062 100644
--- a/arch/arc/Makefile
+++ b/arch/arc/Makefile
@@ -9,12 +9,14 @@
UTS_MACHINE := arc
ifeq ($(CROSS_COMPILE),)
-CROSS_COMPILE := arc-linux-uclibc-
+CROSS_COMPILE := arc-linux-
endif
KBUILD_DEFCONFIG := nsim_700_defconfig
-cflags-y += -mA7 -fno-common -pipe -fno-builtin -D__linux__
+cflags-y += -fno-common -pipe -fno-builtin -D__linux__
+cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7
+cflags-$(CONFIG_ISA_ARCV2) += -mcpu=archs
ifdef CONFIG_ARC_CURR_IN_REG
# For a global register defintion, make sure it gets passed to every file
@@ -33,7 +35,11 @@
cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock
cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape
-cflags-$(CONFIG_ARC_HAS_RTSC) += -mrtsc
+
+ifndef CONFIG_ARC_HAS_LL64
+cflags-$(CONFIG_ISA_ARCV2) += -mno-ll64
+endif
+
cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables
# By default gcc 4.8 generates dwarf4 which kernel unwinder can't grok
@@ -81,8 +87,9 @@
# w/o this dtb won't embed into kernel binary
core-y += arch/arc/boot/dts/
-core-$(CONFIG_ARC_PLAT_FPGA_LEGACY) += arch/arc/plat-arcfpga/
-core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/
+core-$(CONFIG_ARC_PLAT_SIM) += arch/arc/plat-sim/
+core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/
+core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/
drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/
diff --git a/arch/arc/boot/dts/Makefile b/arch/arc/boot/dts/Makefile
index faf240e..b0e3f19 100644
--- a/arch/arc/boot/dts/Makefile
+++ b/arch/arc/boot/dts/Makefile
@@ -1,5 +1,5 @@
# Built-in dtb
-builtindtb-y := angel4
+builtindtb-y := nsim_700
ifneq ($(CONFIG_ARC_BUILTIN_DTB_NAME),"")
builtindtb-y := $(patsubst "%",%,$(CONFIG_ARC_BUILTIN_DTB_NAME))
diff --git a/arch/arc/boot/dts/axc001.dtsi b/arch/arc/boot/dts/axc001.dtsi
new file mode 100644
index 0000000..a5e2726
--- /dev/null
+++ b/arch/arc/boot/dts/axc001.dtsi
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * Device tree for AXC001 770D/EM6/AS221 CPU card
+ * Note that this file only supports the 770D CPU
+ */
+
+/ {
+ compatible = "snps,arc";
+ clock-frequency = <750000000>; /* 750 MHZ */
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ cpu_card {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ ranges = <0x00000000 0xf0000000 0x10000000>;
+
+ cpu_intc: arc700-intc@cpu {
+ compatible = "snps,arc700-intc";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+
+ /*
+ * this GPIO block ORs all interrupts on CPU card (creg,..)
+ * to uplink only 1 IRQ to ARC core intc
+ */
+ dw-apb-gpio@0x2000 {
+ compatible = "snps,dw-apb-gpio";
+ reg = < 0x2000 0x80 >;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ictl_intc: gpio-controller@0 {
+ compatible = "snps,dw-apb-gpio-port";
+ gpio-controller;
+ #gpio-cells = <2>;
+ snps,nr-gpios = <30>;
+ reg = <0>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ interrupt-parent = <&cpu_intc>;
+ interrupts = <15>;
+ };
+ };
+
+ debug_uart: dw-apb-uart@0x5000 {
+ compatible = "snps,dw-apb-uart";
+ reg = <0x5000 0x100>;
+ clock-frequency = <33333000>;
+ interrupt-parent = <&ictl_intc>;
+ interrupts = <19 4>;
+ baud = <115200>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ };
+
+ arcpmu0: pmu {
+ compatible = "snps,arc700-pct";
+ };
+ };
+
+ /*
+ * This INTC is actually connected to DW APB GPIO
+ * which acts as a wire between MB INTC and CPU INTC.
+ * GPIO INTC is configured in platform init code
+ * and here we mimic direct connection from MB INTC to
+ * CPU INTC, thus we set "interrupts = <7>" instead of
+ * "interrupts = <12>"
+ *
+ * This intc actually resides on MB, but we move it here to
+ * avoid duplicating the MB dtsi file given that IRQ from
+ * this intc to cpu intc are different for axs101 and axs103
+ */
+ mb_intc: dw-apb-ictl@0xe0012000 {
+ #interrupt-cells = <1>;
+ compatible = "snps,dw-apb-ictl";
+ reg = < 0xe0012000 0x200 >;
+ interrupt-controller;
+ interrupt-parent = <&cpu_intc>;
+ interrupts = < 7 >;
+ };
+
+ memory {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0x00000000 0x80000000 0x40000000>;
+ device_type = "memory";
+ reg = <0x00000000 0x20000000>; /* 512MiB */
+ };
+};
diff --git a/arch/arc/boot/dts/axc003.dtsi b/arch/arc/boot/dts/axc003.dtsi
new file mode 100644
index 0000000..15c8d62
--- /dev/null
+++ b/arch/arc/boot/dts/axc003.dtsi
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * Device tree for AXC003 CPU card: HS38x UP configuration
+ */
+
+/ {
+ compatible = "snps,arc";
+ clock-frequency = <75000000>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ cpu_card {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ ranges = <0x00000000 0xf0000000 0x10000000>;
+
+ cpu_intc: archs-intc@cpu {
+ compatible = "snps,archs-intc";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+
+ /*
+ * this GPIO block ORs all interrupts on CPU card (creg,..)
+ * to uplink only 1 IRQ to ARC core intc
+ */
+ dw-apb-gpio@0x2000 {
+ compatible = "snps,dw-apb-gpio";
+ reg = < 0x2000 0x80 >;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ictl_intc: gpio-controller@0 {
+ compatible = "snps,dw-apb-gpio-port";
+ gpio-controller;
+ #gpio-cells = <2>;
+ snps,nr-gpios = <30>;
+ reg = <0>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ interrupt-parent = <&cpu_intc>;
+ interrupts = <25>;
+ };
+ };
+
+ debug_uart: dw-apb-uart@0x5000 {
+ compatible = "snps,dw-apb-uart";
+ reg = <0x5000 0x100>;
+ clock-frequency = <33333000>;
+ interrupt-parent = <&ictl_intc>;
+ interrupts = <2 4>;
+ baud = <115200>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ };
+
+ arcpct0: pct {
+ compatible = "snps,archs-pct";
+ #interrupt-cells = <1>;
+ interrupt-parent = <&cpu_intc>;
+ interrupts = <20>;
+ };
+ };
+
+ /*
+ * This INTC is actually connected to DW APB GPIO
+ * which acts as a wire between MB INTC and CPU INTC.
+ * GPIO INTC is configured in platform init code
+ * and here we mimic direct connection from MB INTC to
+ * CPU INTC, thus we set "interrupts = <7>" instead of
+ * "interrupts = <12>"
+ *
+ * This intc actually resides on MB, but we move it here to
+ * avoid duplicating the MB dtsi file given that IRQ from
+ * this intc to cpu intc are different for axs101 and axs103
+ */
+ mb_intc: dw-apb-ictl@0xe0012000 {
+ #interrupt-cells = <1>;
+ compatible = "snps,dw-apb-ictl";
+ reg = < 0xe0012000 0x200 >;
+ interrupt-controller;
+ interrupt-parent = <&cpu_intc>;
+ interrupts = < 24 >;
+ };
+
+ memory {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0x00000000 0x80000000 0x40000000>;
+ device_type = "memory";
+ reg = <0x00000000 0x20000000>; /* 512MiB */
+ };
+};
diff --git a/arch/arc/boot/dts/axc003_idu.dtsi b/arch/arc/boot/dts/axc003_idu.dtsi
new file mode 100644
index 0000000..199d428
--- /dev/null
+++ b/arch/arc/boot/dts/axc003_idu.dtsi
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2014, 2015 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * Device tree for AXC003 CPU card: HS38x2 (Dual Core) with IDU intc
+ */
+
+/ {
+ compatible = "snps,arc";
+ clock-frequency = <75000000>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ cpu_card {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ ranges = <0x00000000 0xf0000000 0x10000000>;
+
+ cpu_intc: archs-intc@cpu {
+ compatible = "snps,archs-intc";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+
+ idu_intc: idu-interrupt-controller {
+ compatible = "snps,archs-idu-intc";
+ interrupt-controller;
+ interrupt-parent = <&cpu_intc>;
+
+ /*
+ * <hwirq distribution>
+ * distribution: 0=RR; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
+ */
+ #interrupt-cells = <2>;
+
+ /*
+ * upstream irqs to core intc - downstream these are
+ * "COMMON" irq 0,1..
+ */
+ interrupts = <24 25>;
+ };
+
+ /*
+ * this GPIO block ORs all interrupts on CPU card (creg,..)
+ * to uplink only 1 IRQ to ARC core intc
+ */
+ dw-apb-gpio@0x2000 {
+ compatible = "snps,dw-apb-gpio";
+ reg = < 0x2000 0x80 >;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ictl_intc: gpio-controller@0 {
+ compatible = "snps,dw-apb-gpio-port";
+ gpio-controller;
+ #gpio-cells = <2>;
+ snps,nr-gpios = <30>;
+ reg = <0>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ interrupt-parent = <&idu_intc>;
+
+ /*
+ * cmn irq 1 -> cpu irq 25
+ * Distribute to cpu0 only
+ */
+ interrupts = <1 1>;
+ };
+ };
+
+ debug_uart: dw-apb-uart@0x5000 {
+ compatible = "snps,dw-apb-uart";
+ reg = <0x5000 0x100>;
+ clock-frequency = <33333000>;
+ interrupt-parent = <&ictl_intc>;
+ interrupts = <2 4>;
+ baud = <115200>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ };
+
+ arcpct0: pct {
+ compatible = "snps,archs-pct";
+ #interrupt-cells = <1>;
+ interrupt-parent = <&cpu_intc>;
+ interrupts = <20>;
+ };
+ };
+
+ /*
+ * This INTC is actually connected to DW APB GPIO
+ * which acts as a wire between MB INTC and CPU INTC.
+ * GPIO INTC is configured in platform init code
+ * and here we mimic direct connection from MB INTC to
+ * CPU INTC, thus we set "interrupts = <0 1>" instead of
+ * "interrupts = <12>"
+ *
+ * This intc actually resides on MB, but we move it here to
+ * avoid duplicating the MB dtsi file given that IRQ from
+ * this intc to cpu intc are different for axs101 and axs103
+ */
+ mb_intc: dw-apb-ictl@0xe0012000 {
+ #interrupt-cells = <1>;
+ compatible = "snps,dw-apb-ictl";
+ reg = < 0xe0012000 0x200 >;
+ interrupt-controller;
+ interrupt-parent = <&idu_intc>;
+ interrupts = <0 1>; /* cmn irq 0 -> cpu irq 24
+ distribute to cpu0 only */
+ };
+
+ memory {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0x00000000 0x80000000 0x40000000>;
+ device_type = "memory";
+ reg = <0x00000000 0x20000000>; /* 512MiB */
+ };
+};
diff --git a/arch/arc/boot/dts/axs101.dts b/arch/arc/boot/dts/axs101.dts
new file mode 100644
index 0000000..3f9b058
--- /dev/null
+++ b/arch/arc/boot/dts/axs101.dts
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * ARC AXS101 S/W development platform
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+/dts-v1/;
+
+/include/ "axc001.dtsi"
+/include/ "axs10x_mb.dtsi"
+
+/ {
+ compatible = "snps,axs101", "snps,arc-sdp";
+
+ chosen {
+ bootargs = "earlycon=uart8250,mmio32,0xe0022000,115200n8 console=tty0 console=ttyS3,115200n8 consoleblank=0";
+ };
+};
diff --git a/arch/arc/boot/dts/axs103.dts b/arch/arc/boot/dts/axs103.dts
new file mode 100644
index 0000000..e6d0e31
--- /dev/null
+++ b/arch/arc/boot/dts/axs103.dts
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * Device Tree for AXS103 SDP with AXS10X Main Board and
+ * AXC003 FPGA Card (with UP bitfile)
+ */
+/dts-v1/;
+
+/include/ "axc003.dtsi"
+/include/ "axs10x_mb.dtsi"
+
+/ {
+ compatible = "snps,axs103", "snps,arc-sdp";
+
+ chosen {
+ bootargs = "earlycon=uart8250,mmio32,0xe0022000,115200n8 console=ttyS3,115200n8 debug print-fatal-signals=1";
+ };
+};
diff --git a/arch/arc/boot/dts/axs103_idu.dts b/arch/arc/boot/dts/axs103_idu.dts
new file mode 100644
index 0000000..f999fef
--- /dev/null
+++ b/arch/arc/boot/dts/axs103_idu.dts
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * Device Tree for AXS103 SDP with AXS10X Main Board and
+ * AXC003 FPGA Card (with SMP bitfile)
+ */
+/dts-v1/;
+
+/include/ "axc003_idu.dtsi"
+/include/ "axs10x_mb.dtsi"
+
+/ {
+ compatible = "snps,axs103", "snps,arc-sdp";
+
+ chosen {
+ bootargs = "earlycon=uart8250,mmio32,0xe0022000,115200n8 console=ttyS3,115200n8 debug print-fatal-signals=1";
+ };
+};
diff --git a/arch/arc/boot/dts/axs10x_mb.dtsi b/arch/arc/boot/dts/axs10x_mb.dtsi
new file mode 100644
index 0000000..f3db321
--- /dev/null
+++ b/arch/arc/boot/dts/axs10x_mb.dtsi
@@ -0,0 +1,224 @@
+/*
+ * Support for peripherals on the AXS10x mainboard
+ *
+ * Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/ {
+ axs10x_mb {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0x00000000 0xe0000000 0x10000000>;
+ interrupt-parent = <&mb_intc>;
+
+ clocks {
+ i2cclk: i2cclk {
+ compatible = "fixed-clock";
+ clock-frequency = <50000000>;
+ #clock-cells = <0>;
+ };
+
+ apbclk: apbclk {
+ compatible = "fixed-clock";
+ clock-frequency = <50000000>;
+ #clock-cells = <0>;
+ };
+
+ mmcclk: mmcclk {
+ compatible = "fixed-clock";
+ clock-frequency = <50000000>;
+ #clock-cells = <0>;
+ };
+ };
+
+ ethernet@0x18000 {
+ #interrupt-cells = <1>;
+ compatible = "snps,dwmac";
+ reg = < 0x18000 0x2000 >;
+ interrupts = < 4 >;
+ interrupt-names = "macirq";
+ phy-mode = "rgmii";
+ snps,pbl = < 32 >;
+ clocks = <&apbclk>;
+ clock-names = "stmmaceth";
+ };
+
+ ehci@0x40000 {
+ compatible = "generic-ehci";
+ reg = < 0x40000 0x100 >;
+ interrupts = < 8 >;
+ };
+
+ ohci@0x60000 {
+ compatible = "generic-ohci";
+ reg = < 0x60000 0x100 >;
+ interrupts = < 8 >;
+ };
+
+ /*
+ * According to DW Mobile Storage databook it is required
+ * to use "Hold Register" if card is enumerated in SDR12 or
+ * SDR25 modes.
+ *
+ * Utilization of "Hold Register" is already implemented via
+ * dw_mci_pltfm_prepare_command() which in its turn gets
+ * used through dw_mci_drv_data->prepare_command call-back.
+ * This call-back is used in Altera Socfpga platform and so
+ * we may reuse it saying that we're compatible with their
+ * "altr,socfpga-dw-mshc".
+ *
+ * Most probably "Hold Register" utilization is platform-
+ * independent requirement which means that single unified
+ * "snps,dw-mshc" should be enough for all users of DW MMC once
+ * dw_mci_pltfm_prepare_command() is used in generic platform
+ * code.
+ */
+ mmc@0x15000 {
+ compatible = "altr,socfpga-dw-mshc";
+ reg = < 0x15000 0x400 >;
+ num-slots = < 1 >;
+ fifo-depth = < 16 >;
+ card-detect-delay = < 200 >;
+ clocks = <&apbclk>, <&mmcclk>;
+ clock-names = "biu", "ciu";
+ interrupts = < 7 >;
+ bus-width = < 4 >;
+ };
+
+ uart@0x20000 {
+ compatible = "snps,dw-apb-uart";
+ reg = <0x20000 0x100>;
+ clock-frequency = <33333333>;
+ interrupts = <17>;
+ baud = <115200>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ };
+
+ uart@0x21000 {
+ compatible = "snps,dw-apb-uart";
+ reg = <0x21000 0x100>;
+ clock-frequency = <33333333>;
+ interrupts = <18>;
+ baud = <115200>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ };
+
+ /* UART muxed with USB data port (ttyS3) */
+ uart@0x22000 {
+ compatible = "snps,dw-apb-uart";
+ reg = <0x22000 0x100>;
+ clock-frequency = <33333333>;
+ interrupts = <19>;
+ baud = <115200>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ };
+
+ i2c@0x1d000 {
+ compatible = "snps,designware-i2c";
+ reg = <0x1d000 0x100>;
+ clock-frequency = <400000>;
+ clocks = <&i2cclk>;
+ interrupts = <14>;
+ };
+
+ i2c@0x1e000 {
+ compatible = "snps,designware-i2c";
+ reg = <0x1e000 0x100>;
+ clock-frequency = <400000>;
+ clocks = <&i2cclk>;
+ interrupts = <15>;
+ };
+
+ i2c@0x1f000 {
+ compatible = "snps,designware-i2c";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x1f000 0x100>;
+ clock-frequency = <400000>;
+ clocks = <&i2cclk>;
+ interrupts = <16>;
+
+ eeprom@0x54{
+ compatible = "24c01";
+ reg = <0x54>;
+ pagesize = <0x8>;
+ };
+
+ eeprom@0x57{
+ compatible = "24c04";
+ reg = <0x57>;
+ pagesize = <0x8>;
+ };
+ };
+
+ gpio0:gpio@13000 {
+ compatible = "snps,dw-apb-gpio";
+ reg = <0x13000 0x1000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ gpio0_banka: gpio-controller@0 {
+ compatible = "snps,dw-apb-gpio-port";
+ gpio-controller;
+ #gpio-cells = <2>;
+ snps,nr-gpios = <32>;
+ reg = <0>;
+ };
+
+ gpio0_bankb: gpio-controller@1 {
+ compatible = "snps,dw-apb-gpio-port";
+ gpio-controller;
+ #gpio-cells = <2>;
+ snps,nr-gpios = <8>;
+ reg = <1>;
+ };
+
+ gpio0_bankc: gpio-controller@2 {
+ compatible = "snps,dw-apb-gpio-port";
+ gpio-controller;
+ #gpio-cells = <2>;
+ snps,nr-gpios = <8>;
+ reg = <2>;
+ };
+ };
+
+ gpio1:gpio@14000 {
+ compatible = "snps,dw-apb-gpio";
+ reg = <0x14000 0x1000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ gpio1_banka: gpio-controller@0 {
+ compatible = "snps,dw-apb-gpio-port";
+ gpio-controller;
+ #gpio-cells = <2>;
+ snps,nr-gpios = <30>;
+ reg = <0>;
+ };
+
+ gpio1_bankb: gpio-controller@1 {
+ compatible = "snps,dw-apb-gpio-port";
+ gpio-controller;
+ #gpio-cells = <2>;
+ snps,nr-gpios = <10>;
+ reg = <1>;
+ };
+
+ gpio1_bankc: gpio-controller@2 {
+ compatible = "snps,dw-apb-gpio-port";
+ gpio-controller;
+ #gpio-cells = <2>;
+ snps,nr-gpios = <8>;
+ reg = <2>;
+ };
+ };
+ };
+};
diff --git a/arch/arc/boot/dts/angel4.dts b/arch/arc/boot/dts/nsim_700.dts
similarity index 97%
rename from arch/arc/boot/dts/angel4.dts
rename to arch/arc/boot/dts/nsim_700.dts
index 3b076fb..105a001 100644
--- a/arch/arc/boot/dts/angel4.dts
+++ b/arch/arc/boot/dts/nsim_700.dts
@@ -10,7 +10,7 @@
/include/ "skeleton.dtsi"
/ {
- compatible = "snps,arc-angel4";
+ compatible = "snps,nsim";
clock-frequency = <80000000>; /* 80 MHZ */
#address-cells = <1>;
#size-cells = <1>;
diff --git a/arch/arc/boot/dts/nsim_hs.dts b/arch/arc/boot/dts/nsim_hs.dts
new file mode 100644
index 0000000..911f069
--- /dev/null
+++ b/arch/arc/boot/dts/nsim_hs.dts
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+/dts-v1/;
+
+/include/ "skeleton.dtsi"
+
+/ {
+ compatible = "snps,nsim_hs";
+ interrupt-parent = <&core_intc>;
+
+ chosen {
+ bootargs = "earlycon=arc_uart,mmio32,0xc0fc1000,115200n8 console=ttyARC0,115200n8";
+ };
+
+ aliases {
+ serial0 = &arcuart0;
+ };
+
+ fpga {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ /* child and parent address space 1:1 mapped */
+ ranges;
+
+ core_intc: core-interrupt-controller {
+ compatible = "snps,archs-intc";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+
+ arcuart0: serial@c0fc1000 {
+ compatible = "snps,arc-uart";
+ reg = <0xc0fc1000 0x100>;
+ interrupts = <24>;
+ clock-frequency = <80000000>;
+ current-speed = <115200>;
+ status = "okay";
+ };
+
+ arcpct0: pct {
+ compatible = "snps,archs-pct";
+ #interrupt-cells = <1>;
+ interrupts = <20>;
+ };
+ };
+};
diff --git a/arch/arc/boot/dts/nsim_hs_idu.dts b/arch/arc/boot/dts/nsim_hs_idu.dts
new file mode 100644
index 0000000..46ab319
--- /dev/null
+++ b/arch/arc/boot/dts/nsim_hs_idu.dts
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+/dts-v1/;
+
+/include/ "skeleton.dtsi"
+
+/ {
+ compatible = "snps,nsim_hs";
+ interrupt-parent = <&core_intc>;
+
+ chosen {
+ bootargs = "earlycon=arc_uart,mmio32,0xc0fc1000,115200n8 console=ttyARC0,115200n8";
+ };
+
+ aliases {
+ serial0 = &arcuart0;
+ };
+
+ fpga {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ /* child and parent address space 1:1 mapped */
+ ranges;
+
+ core_intc: core-interrupt-controller {
+ compatible = "snps,archs-intc";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+
+ idu_intc: idu-interrupt-controller {
+ compatible = "snps,archs-idu-intc";
+ interrupt-controller;
+ interrupt-parent = <&core_intc>;
+
+ /*
+ * <hwirq distribution>
+ * distribution: 0=RR; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
+ */
+ #interrupt-cells = <2>;
+
+ /*
+ * upstream irqs to core intc - downstream these are
+ * "COMMON" irq 0,1..
+ */
+ interrupts = <24 25 26 27 28 29 30 31>;
+ };
+
+ arcuart0: serial@c0fc1000 {
+ compatible = "snps,arc-uart";
+ reg = <0xc0fc1000 0x100>;
+ interrupt-parent = <&idu_intc>;
+ interrupts = <0 0>;
+ clock-frequency = <80000000>;
+ current-speed = <115200>;
+ status = "okay";
+ };
+
+ arcpct0: pct {
+ compatible = "snps,archs-pct";
+ #interrupt-cells = <1>;
+ interrupts = <20>;
+ };
+ };
+};
diff --git a/arch/arc/boot/dts/nsimosci_hs.dts b/arch/arc/boot/dts/nsimosci_hs.dts
new file mode 100644
index 0000000..d64a96f
--- /dev/null
+++ b/arch/arc/boot/dts/nsimosci_hs.dts
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+/dts-v1/;
+
+/include/ "skeleton.dtsi"
+
+/ {
+ compatible = "snps,nsimosci_hs";
+ clock-frequency = <20000000>; /* 20 MHZ */
+ #address-cells = <1>;
+ #size-cells = <1>;
+ interrupt-parent = <&core_intc>;
+
+ chosen {
+ /* this is for console on PGU */
+ /* bootargs = "console=tty0 consoleblank=0"; */
+ /* this is for console on serial */
+ bootargs = "earlycon=uart8250,mmio32,0xf0000000,115200n8 console=tty0 console=ttyS0,115200n8 consoleblank=0 debug";
+ };
+
+ aliases {
+ serial0 = &uart0;
+ };
+
+ fpga {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ /* child and parent address space 1:1 mapped */
+ ranges;
+
+ core_intc: core-interrupt-controller {
+ compatible = "snps,archs-intc";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+
+ uart0: serial@f0000000 {
+ compatible = "ns8250";
+ reg = <0xf0000000 0x2000>;
+ interrupts = <24>;
+ clock-frequency = <3686400>;
+ baud = <115200>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ no-loopback-test = <1>;
+ };
+
+ pgu0: pgu@f9000000 {
+ compatible = "snps,arcpgufb";
+ reg = <0xf9000000 0x400>;
+ };
+
+ ps2: ps2@f9001000 {
+ compatible = "snps,arc_ps2";
+ reg = <0xf9000400 0x14>;
+ interrupts = <27>;
+ interrupt-names = "arc_ps2_irq";
+ };
+
+ eth0: ethernet@f0003000 {
+ compatible = "snps,oscilan";
+ reg = <0xf0003000 0x44>;
+ interrupts = <25>, <26>;
+ interrupt-names = "rx", "tx";
+ };
+
+ arcpct0: pct {
+ compatible = "snps,archs-pct";
+ #interrupt-cells = <1>;
+ interrupts = <20>;
+ };
+ };
+};
diff --git a/arch/arc/boot/dts/nsimosci_hs_idu.dts b/arch/arc/boot/dts/nsimosci_hs_idu.dts
new file mode 100644
index 0000000..f6bf0ca
--- /dev/null
+++ b/arch/arc/boot/dts/nsimosci_hs_idu.dts
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+/dts-v1/;
+
+/include/ "skeleton.dtsi"
+
+/ {
+ compatible = "snps,nsimosci_hs";
+ clock-frequency = <5000000>; /* 5 MHZ */
+ #address-cells = <1>;
+ #size-cells = <1>;
+ interrupt-parent = <&core_intc>;
+
+ chosen {
+ /* this is for console on serial */
+ bootargs = "earlycon=uart8250,mmio32,0xf0000000,115200n8 console=tty0 console=ttyS0,115200n8 consoleblan=0 debug";
+ };
+
+ aliases {
+ serial0 = &uart0;
+ };
+
+ fpga {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ /* child and parent address space 1:1 mapped */
+ ranges;
+
+ core_intc: core-interrupt-controller {
+ compatible = "snps,archs-intc";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+/* interrupts = <16 17 18 19 20 21 22 23 24 25>; */
+ };
+
+ idu_intc: idu-interrupt-controller {
+ compatible = "snps,archs-idu-intc";
+ interrupt-controller;
+ interrupt-parent = <&core_intc>;
+
+ /*
+ * <hwirq distribution>
+ * distribution: 0=RR; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
+ */
+ #interrupt-cells = <2>;
+
+ /*
+ * upstream irqs to core intc - downstream these are
+ * "COMMON" irq 0,1..
+ */
+ interrupts = <24 25 26 27 28 29 30 31>;
+ };
+
+ uart0: serial@f0000000 {
+ compatible = "ns8250";
+ reg = <0xf0000000 0x2000>;
+ interrupt-parent = <&idu_intc>;
+ interrupts = <0 0>; /* cmn irq 0 -> cpu irq 24
+ RR distribute to all cpus */
+ clock-frequency = <3686400>;
+ baud = <115200>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ no-loopback-test = <1>;
+ };
+
+ pgu0: pgu@f9000000 {
+ compatible = "snps,arcpgufb";
+ reg = <0xf9000000 0x400>;
+ };
+
+ ps2: ps2@f9001000 {
+ compatible = "snps,arc_ps2";
+ reg = <0xf9000400 0x14>;
+ interrupts = <3 0>;
+ interrupt-parent = <&idu_intc>;
+ interrupt-names = "arc_ps2_irq";
+ };
+
+ eth0: ethernet@f0003000 {
+ compatible = "snps,oscilan";
+ reg = <0xf0003000 0x44>;
+ interrupt-parent = <&idu_intc>;
+ interrupts = <1 2>, <2 2>;
+ interrupt-names = "rx", "tx";
+ };
+
+ arcpct0: pct {
+ compatible = "snps,archs-pct";
+ #interrupt-cells = <1>;
+ interrupts = <20>;
+ };
+ };
+};
diff --git a/arch/arc/boot/dts/vdk_axc003.dtsi b/arch/arc/boot/dts/vdk_axc003.dtsi
new file mode 100644
index 0000000..9393fd9
--- /dev/null
+++ b/arch/arc/boot/dts/vdk_axc003.dtsi
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2013, 2014 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * Device tree for AXC003 CPU card: HS38x UP configuration (VDK version)
+ */
+
+/ {
+ compatible = "snps,arc";
+ clock-frequency = <50000000>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ cpu_card {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ ranges = <0x00000000 0xf0000000 0x10000000>;
+
+ cpu_intc: archs-intc@cpu {
+ compatible = "snps,archs-intc";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+
+ debug_uart: dw-apb-uart@0x5000 {
+ compatible = "snps,dw-apb-uart";
+ reg = <0x5000 0x100>;
+ clock-frequency = <2403200>;
+ interrupt-parent = <&cpu_intc>;
+ interrupts = <19>;
+ baud = <115200>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ };
+
+ };
+
+ mb_intc: dw-apb-ictl@0xe0012000 {
+ #interrupt-cells = <1>;
+ compatible = "snps,dw-apb-ictl";
+ reg = < 0xe0012000 0x200 >;
+ interrupt-controller;
+ interrupt-parent = <&cpu_intc>;
+ interrupts = < 18 >;
+ };
+
+ memory {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0x00000000 0x80000000 0x40000000>;
+ device_type = "memory";
+ reg = <0x00000000 0x20000000>; /* 512MiB */
+ };
+};
diff --git a/arch/arc/boot/dts/vdk_axc003_idu.dtsi b/arch/arc/boot/dts/vdk_axc003_idu.dtsi
new file mode 100644
index 0000000..9bee8ed
--- /dev/null
+++ b/arch/arc/boot/dts/vdk_axc003_idu.dtsi
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2014, 2015 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * Device tree for AXC003 CPU card:
+ * HS38x2 (Dual Core) with IDU intc (VDK version)
+ */
+
+/ {
+ compatible = "snps,arc";
+ clock-frequency = <50000000>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ cpu_card {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ ranges = <0x00000000 0xf0000000 0x10000000>;
+
+ cpu_intc: archs-intc@cpu {
+ compatible = "snps,archs-intc";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+
+ idu_intc: idu-interrupt-controller {
+ compatible = "snps,archs-idu-intc";
+ interrupt-controller;
+ interrupt-parent = <&cpu_intc>;
+
+ /*
+ * <hwirq distribution>
+ * distribution: 0=RR; 1=cpu0, 2=cpu1, 4=cpu2, 8=cpu3
+ */
+ #interrupt-cells = <2>;
+
+ interrupts = <24 25 26 27>;
+ };
+
+ debug_uart: dw-apb-uart@0x5000 {
+ compatible = "snps,dw-apb-uart";
+ reg = <0x5000 0x100>;
+ clock-frequency = <2403200>;
+ interrupt-parent = <&idu_intc>;
+ interrupts = <2 0>;
+ baud = <115200>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ };
+
+ };
+
+ mb_intc: dw-apb-ictl@0xe0012000 {
+ #interrupt-cells = <1>;
+ compatible = "snps,dw-apb-ictl";
+ reg = < 0xe0012000 0x200 >;
+ interrupt-controller;
+ interrupt-parent = <&idu_intc>;
+ interrupts = < 0 0 >;
+ };
+
+ memory {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0x00000000 0x80000000 0x40000000>;
+ device_type = "memory";
+ reg = <0x00000000 0x20000000>; /* 512MiB */
+ };
+};
diff --git a/arch/arc/boot/dts/vdk_axs10x_mb.dtsi b/arch/arc/boot/dts/vdk_axs10x_mb.dtsi
new file mode 100644
index 0000000..45cd665
--- /dev/null
+++ b/arch/arc/boot/dts/vdk_axs10x_mb.dtsi
@@ -0,0 +1,93 @@
+/*
+ * Support for peripherals on the AXS10x mainboard (VDK version)
+ *
+ * Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/ {
+ axs10x_mb_vdk {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0x00000000 0xe0000000 0x10000000>;
+ interrupt-parent = <&mb_intc>;
+
+ clocks {
+ apbclk: apbclk {
+ compatible = "fixed-clock";
+ clock-frequency = <50000000>;
+ #clock-cells = <0>;
+ };
+
+ };
+
+ ethernet@0x18000 {
+ #interrupt-cells = <1>;
+ compatible = "snps,dwmac";
+ reg = < 0x18000 0x2000 >;
+ interrupts = < 4 >;
+ interrupt-names = "macirq";
+ phy-mode = "rgmii";
+ snps,phy-addr = < 0 >; // VDK model phy address is 0
+ snps,pbl = < 32 >;
+ clocks = <&apbclk>;
+ clock-names = "stmmaceth";
+ };
+
+ ehci@0x40000 {
+ compatible = "generic-ehci";
+ reg = < 0x40000 0x100 >;
+ interrupts = < 8 >;
+ };
+
+ uart@0x20000 {
+ compatible = "snps,dw-apb-uart";
+ reg = <0x20000 0x100>;
+ clock-frequency = <2403200>;
+ interrupts = <17>;
+ baud = <115200>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ };
+
+ uart@0x21000 {
+ compatible = "snps,dw-apb-uart";
+ reg = <0x21000 0x100>;
+ clock-frequency = <2403200>;
+ interrupts = <18>;
+ baud = <115200>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ };
+
+ uart@0x22000 {
+ compatible = "snps,dw-apb-uart";
+ reg = <0x22000 0x100>;
+ clock-frequency = <2403200>;
+ interrupts = <19>;
+ baud = <115200>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ };
+
+/* PGU output directly sent to virtual LCD screen; hdmi controller not modelled */
+ pgu@0x17000 {
+ compatible = "snps,arcpgufb";
+ reg = <0x17000 0x400>;
+ clock-frequency = <51000000>; /* PGU'clock is initated in init function */
+ /* interrupts = <5>; PGU interrupts not used, this vector is used for ps2 below */
+ };
+
+/* VDK has additional ps2 keyboard/mouse interface integrated in LCD screen model */
+ ps2: ps2@e0017400 {
+ compatible = "snps,arc_ps2";
+ reg = <0x17400 0x14>;
+ interrupts = <5>;
+ interrupt-names = "arc_ps2_irq";
+ };
+ };
+};
diff --git a/arch/arc/boot/dts/vdk_hs38.dts b/arch/arc/boot/dts/vdk_hs38.dts
new file mode 100644
index 0000000..5d803dd
--- /dev/null
+++ b/arch/arc/boot/dts/vdk_hs38.dts
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
+ *
+ * ARC HS38 Virtual Development Kit (VDK)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+/dts-v1/;
+
+/include/ "vdk_axc003.dtsi"
+/include/ "vdk_axs10x_mb.dtsi"
+
+/ {
+ compatible = "snps,axs103";
+
+ chosen {
+ bootargs = "earlycon=uart8250,mmio32,0xe0022000,115200n8 console=tty0 console=ttyS3,115200n8 consoleblank=0";
+ };
+};
diff --git a/arch/arc/boot/dts/vdk_hs38_smp.dts b/arch/arc/boot/dts/vdk_hs38_smp.dts
new file mode 100644
index 0000000..031a5bc
--- /dev/null
+++ b/arch/arc/boot/dts/vdk_hs38_smp.dts
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
+ *
+ * ARC HS38 Virtual Development Kit, SMP version (VDK)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+/dts-v1/;
+
+/include/ "vdk_axc003_idu.dtsi"
+/include/ "vdk_axs10x_mb.dtsi"
+
+/ {
+ compatible = "snps,axs103";
+
+ chosen {
+ bootargs = "earlycon=uart8250,mmio32,0xe0022000,115200n8 console=tty0 console=ttyS3,115200n8 consoleblank=0";
+ };
+};
diff --git a/arch/arc/configs/axs101_defconfig b/arch/arc/configs/axs101_defconfig
new file mode 100644
index 0000000..562dac6
--- /dev/null
+++ b/arch/arc/configs/axs101_defconfig
@@ -0,0 +1,111 @@
+CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
+CONFIG_DEFAULT_HOSTNAME="ARCLinux"
+# CONFIG_SWAP is not set
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+# CONFIG_CROSS_MEMORY_ATTACH is not set
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_NAMESPACES=y
+# CONFIG_UTS_NS is not set
+# CONFIG_PID_NS is not set
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_SOURCE="../arc_initramfs/"
+CONFIG_EMBEDDED=y
+CONFIG_PERF_EVENTS=y
+# CONFIG_VM_EVENT_COUNTERS is not set
+# CONFIG_SLUB_DEBUG is not set
+# CONFIG_COMPAT_BRK is not set
+CONFIG_MODULES=y
+CONFIG_PARTITION_ADVANCED=y
+CONFIG_ARC_PLAT_AXS10X=y
+CONFIG_AXS101=y
+CONFIG_ARC_CACHE_LINE_SHIFT=5
+CONFIG_ARC_BUILTIN_DTB_NAME="axs101"
+CONFIG_PREEMPT=y
+# CONFIG_COMPACTION is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_NET_KEY=y
+CONFIG_INET=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
+# CONFIG_INET_XFRM_MODE_TUNNEL is not set
+# CONFIG_INET_XFRM_MODE_BEET is not set
+# CONFIG_IPV6 is not set
+# CONFIG_STANDALONE is not set
+# CONFIG_PREVENT_FIRMWARE_BUILD is not set
+# CONFIG_FIRMWARE_IN_KERNEL is not set
+CONFIG_SCSI=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_NETDEVICES=y
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+CONFIG_STMMAC_ETH=y
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+CONFIG_NATIONAL_PHY=y
+# CONFIG_USB_NET_DRIVERS is not set
+CONFIG_INPUT_EVDEV=y
+CONFIG_MOUSE_PS2_TOUCHKIT=y
+CONFIG_MOUSE_SERIAL=y
+CONFIG_MOUSE_SYNAPTICS_USB=y
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_DEVKMEM is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_DW=y
+CONFIG_SERIAL_OF_PLATFORM=y
+# CONFIG_HW_RANDOM is not set
+CONFIG_I2C=y
+CONFIG_I2C_CHARDEV=y
+CONFIG_I2C_DESIGNWARE_PLATFORM=y
+# CONFIG_HWMON is not set
+CONFIG_FB=y
+# CONFIG_VGA_CONSOLE is not set
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
+CONFIG_LOGO=y
+# CONFIG_LOGO_LINUX_MONO is not set
+# CONFIG_LOGO_LINUX_VGA16 is not set
+# CONFIG_LOGO_LINUX_CLUT224 is not set
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_HCD_PLATFORM=y
+CONFIG_USB_OHCI_HCD=y
+CONFIG_USB_OHCI_HCD_PLATFORM=y
+CONFIG_USB_STORAGE=y
+CONFIG_MMC=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_PLTFM=y
+CONFIG_MMC_DW=y
+CONFIG_MMC_DW_IDMAC=y
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT3_FS=y
+CONFIG_EXT4_FS=y
+CONFIG_MSDOS_FS=y
+CONFIG_VFAT_FS=y
+CONFIG_NTFS_FS=y
+CONFIG_TMPFS=y
+CONFIG_JFFS2_FS=y
+CONFIG_NFS_FS=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+# CONFIG_ENABLE_WARN_DEPRECATED is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_STRIP_ASM_SYMS=y
+CONFIG_LOCKUP_DETECTOR=y
+CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
+# CONFIG_SCHED_DEBUG is not set
+# CONFIG_DEBUG_PREEMPT is not set
+# CONFIG_FTRACE is not set
diff --git a/arch/arc/configs/axs103_defconfig b/arch/arc/configs/axs103_defconfig
new file mode 100644
index 0000000..83a6d8d
--- /dev/null
+++ b/arch/arc/configs/axs103_defconfig
@@ -0,0 +1,117 @@
+CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
+CONFIG_DEFAULT_HOSTNAME="ARCLinux"
+# CONFIG_SWAP is not set
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+# CONFIG_CROSS_MEMORY_ATTACH is not set
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_NAMESPACES=y
+# CONFIG_UTS_NS is not set
+# CONFIG_PID_NS is not set
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_SOURCE="../../arc_initramfs_hs/"
+CONFIG_EMBEDDED=y
+CONFIG_PERF_EVENTS=y
+# CONFIG_VM_EVENT_COUNTERS is not set
+# CONFIG_SLUB_DEBUG is not set
+# CONFIG_COMPAT_BRK is not set
+CONFIG_MODULES=y
+CONFIG_PARTITION_ADVANCED=y
+CONFIG_ARC_PLAT_AXS10X=y
+CONFIG_AXS103=y
+CONFIG_ISA_ARCV2=y
+CONFIG_ARC_BUILTIN_DTB_NAME="axs103"
+CONFIG_PREEMPT=y
+# CONFIG_COMPACTION is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_NET_KEY=y
+CONFIG_INET=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
+# CONFIG_INET_XFRM_MODE_TUNNEL is not set
+# CONFIG_INET_XFRM_MODE_BEET is not set
+# CONFIG_IPV6 is not set
+# CONFIG_STANDALONE is not set
+# CONFIG_PREVENT_FIRMWARE_BUILD is not set
+# CONFIG_FIRMWARE_IN_KERNEL is not set
+CONFIG_MTD=y
+CONFIG_MTD_CMDLINE_PARTS=y
+CONFIG_MTD_BLOCK=y
+CONFIG_MTD_NAND=y
+CONFIG_MTD_NAND_AXS=y
+CONFIG_SCSI=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_NETDEVICES=y
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+CONFIG_STMMAC_ETH=y
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+CONFIG_NATIONAL_PHY=y
+# CONFIG_USB_NET_DRIVERS is not set
+CONFIG_INPUT_EVDEV=y
+CONFIG_MOUSE_PS2_TOUCHKIT=y
+CONFIG_MOUSE_SERIAL=y
+CONFIG_MOUSE_SYNAPTICS_USB=y
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_DEVKMEM is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_DW=y
+CONFIG_SERIAL_OF_PLATFORM=y
+# CONFIG_HW_RANDOM is not set
+CONFIG_I2C=y
+CONFIG_I2C_CHARDEV=y
+CONFIG_I2C_DESIGNWARE_PLATFORM=y
+# CONFIG_HWMON is not set
+CONFIG_FB=y
+# CONFIG_VGA_CONSOLE is not set
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
+CONFIG_LOGO=y
+# CONFIG_LOGO_LINUX_MONO is not set
+# CONFIG_LOGO_LINUX_VGA16 is not set
+# CONFIG_LOGO_LINUX_CLUT224 is not set
+CONFIG_USB=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_HCD_PLATFORM=y
+CONFIG_USB_OHCI_HCD=y
+CONFIG_USB_OHCI_HCD_PLATFORM=y
+CONFIG_USB_STORAGE=y
+CONFIG_MMC=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_PLTFM=y
+CONFIG_MMC_DW=y
+CONFIG_MMC_DW_IDMAC=y
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT3_FS=y
+CONFIG_EXT4_FS=y
+CONFIG_MSDOS_FS=y
+CONFIG_VFAT_FS=y
+CONFIG_NTFS_FS=y
+CONFIG_TMPFS=y
+CONFIG_JFFS2_FS=y
+CONFIG_NFS_FS=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+# CONFIG_ENABLE_WARN_DEPRECATED is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_STRIP_ASM_SYMS=y
+CONFIG_LOCKUP_DETECTOR=y
+CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
+# CONFIG_SCHED_DEBUG is not set
+# CONFIG_DEBUG_PREEMPT is not set
+# CONFIG_FTRACE is not set
diff --git a/arch/arc/configs/axs103_smp_defconfig b/arch/arc/configs/axs103_smp_defconfig
new file mode 100644
index 0000000..f1e1c84
--- /dev/null
+++ b/arch/arc/configs/axs103_smp_defconfig
@@ -0,0 +1,118 @@
+CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
+CONFIG_DEFAULT_HOSTNAME="ARCLinux"
+# CONFIG_SWAP is not set
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+# CONFIG_CROSS_MEMORY_ATTACH is not set
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_NAMESPACES=y
+# CONFIG_UTS_NS is not set
+# CONFIG_PID_NS is not set
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_SOURCE="../../arc_initramfs_hs/"
+CONFIG_EMBEDDED=y
+CONFIG_PERF_EVENTS=y
+# CONFIG_VM_EVENT_COUNTERS is not set
+# CONFIG_COMPAT_BRK is not set
+CONFIG_SLAB=y
+CONFIG_MODULES=y
+CONFIG_PARTITION_ADVANCED=y
+CONFIG_ARC_PLAT_AXS10X=y
+CONFIG_AXS103=y
+CONFIG_ISA_ARCV2=y
+CONFIG_SMP=y
+CONFIG_ARC_BUILTIN_DTB_NAME="axs103_idu"
+CONFIG_PREEMPT=y
+# CONFIG_COMPACTION is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_NET_KEY=y
+CONFIG_INET=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
+# CONFIG_INET_XFRM_MODE_TUNNEL is not set
+# CONFIG_INET_XFRM_MODE_BEET is not set
+# CONFIG_IPV6 is not set
+# CONFIG_STANDALONE is not set
+# CONFIG_PREVENT_FIRMWARE_BUILD is not set
+# CONFIG_FIRMWARE_IN_KERNEL is not set
+CONFIG_MTD=y
+CONFIG_MTD_CMDLINE_PARTS=y
+CONFIG_MTD_BLOCK=y
+CONFIG_MTD_NAND=y
+CONFIG_MTD_NAND_AXS=y
+CONFIG_SCSI=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_NETDEVICES=y
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+CONFIG_STMMAC_ETH=y
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+CONFIG_NATIONAL_PHY=y
+# CONFIG_USB_NET_DRIVERS is not set
+CONFIG_INPUT_EVDEV=y
+CONFIG_MOUSE_PS2_TOUCHKIT=y
+CONFIG_MOUSE_SERIAL=y
+CONFIG_MOUSE_SYNAPTICS_USB=y
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_DEVKMEM is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_DW=y
+CONFIG_SERIAL_OF_PLATFORM=y
+# CONFIG_HW_RANDOM is not set
+CONFIG_I2C=y
+CONFIG_I2C_CHARDEV=y
+CONFIG_I2C_DESIGNWARE_PLATFORM=y
+# CONFIG_HWMON is not set
+CONFIG_FB=y
+# CONFIG_VGA_CONSOLE is not set
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
+CONFIG_LOGO=y
+# CONFIG_LOGO_LINUX_MONO is not set
+# CONFIG_LOGO_LINUX_VGA16 is not set
+# CONFIG_LOGO_LINUX_CLUT224 is not set
+CONFIG_USB=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_HCD_PLATFORM=y
+CONFIG_USB_OHCI_HCD=y
+CONFIG_USB_OHCI_HCD_PLATFORM=y
+CONFIG_USB_STORAGE=y
+CONFIG_MMC=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_PLTFM=y
+CONFIG_MMC_DW=y
+CONFIG_MMC_DW_IDMAC=y
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT3_FS=y
+CONFIG_EXT4_FS=y
+CONFIG_MSDOS_FS=y
+CONFIG_VFAT_FS=y
+CONFIG_NTFS_FS=y
+CONFIG_TMPFS=y
+CONFIG_JFFS2_FS=y
+CONFIG_NFS_FS=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+# CONFIG_ENABLE_WARN_DEPRECATED is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_STRIP_ASM_SYMS=y
+CONFIG_LOCKUP_DETECTOR=y
+CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
+# CONFIG_SCHED_DEBUG is not set
+# CONFIG_DEBUG_PREEMPT is not set
+# CONFIG_FTRACE is not set
diff --git a/arch/arc/configs/nsim_700_defconfig b/arch/arc/configs/nsim_700_defconfig
index ef4d3bc..138f9d8 100644
--- a/arch/arc/configs/nsim_700_defconfig
+++ b/arch/arc/configs/nsim_700_defconfig
@@ -1,4 +1,4 @@
-CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
+CONFIG_CROSS_COMPILE="arc-linux-"
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_DEFAULT_HOSTNAME="ARCLinux"
# CONFIG_SWAP is not set
@@ -22,9 +22,8 @@
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_IOSCHED_DEADLINE is not set
# CONFIG_IOSCHED_CFQ is not set
-CONFIG_ARC_PLAT_FPGA_LEGACY=y
-# CONFIG_ARC_HAS_RTSC is not set
-CONFIG_ARC_BUILTIN_DTB_NAME="angel4"
+CONFIG_ARC_PLAT_SIM=y
+CONFIG_ARC_BUILTIN_DTB_NAME="nsim_700"
CONFIG_PREEMPT=y
# CONFIG_COMPACTION is not set
# CONFIG_CROSS_MEMORY_ATTACH is not set
diff --git a/arch/arc/configs/nsim_hs_defconfig b/arch/arc/configs/nsim_hs_defconfig
new file mode 100644
index 0000000..f761a7c
--- /dev/null
+++ b/arch/arc/configs/nsim_hs_defconfig
@@ -0,0 +1,64 @@
+CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_DEFAULT_HOSTNAME="ARCLinux"
+# CONFIG_SWAP is not set
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+# CONFIG_CROSS_MEMORY_ATTACH is not set
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_NAMESPACES=y
+# CONFIG_UTS_NS is not set
+# CONFIG_PID_NS is not set
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_SOURCE="../arc_initramfs_hs/"
+CONFIG_KALLSYMS_ALL=y
+CONFIG_EMBEDDED=y
+# CONFIG_SLUB_DEBUG is not set
+# CONFIG_COMPAT_BRK is not set
+CONFIG_KPROBES=y
+CONFIG_MODULES=y
+# CONFIG_LBDAF is not set
+# CONFIG_BLK_DEV_BSG is not set
+# CONFIG_IOSCHED_DEADLINE is not set
+# CONFIG_IOSCHED_CFQ is not set
+CONFIG_ARC_PLAT_SIM=y
+CONFIG_ISA_ARCV2=y
+CONFIG_ARC_BUILTIN_DTB_NAME="nsim_hs"
+CONFIG_PREEMPT=y
+# CONFIG_COMPACTION is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_UNIX_DIAG=y
+CONFIG_NET_KEY=y
+CONFIG_INET=y
+# CONFIG_IPV6 is not set
+# CONFIG_STANDALONE is not set
+# CONFIG_PREVENT_FIRMWARE_BUILD is not set
+# CONFIG_FIRMWARE_IN_KERNEL is not set
+# CONFIG_BLK_DEV is not set
+# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_SERIO is not set
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_DEVKMEM is not set
+CONFIG_SERIAL_ARC=y
+CONFIG_SERIAL_ARC_CONSOLE=y
+# CONFIG_HW_RANDOM is not set
+# CONFIG_HWMON is not set
+# CONFIG_VGA_CONSOLE is not set
+# CONFIG_HID is not set
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT2_FS=y
+CONFIG_EXT2_FS_XATTR=y
+CONFIG_TMPFS=y
+# CONFIG_MISC_FILESYSTEMS is not set
+CONFIG_NFS_FS=y
+# CONFIG_ENABLE_WARN_DEPRECATED is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
+# CONFIG_DEBUG_PREEMPT is not set
+CONFIG_XZ_DEC=y
diff --git a/arch/arc/configs/nsim_hs_smp_defconfig b/arch/arc/configs/nsim_hs_smp_defconfig
new file mode 100644
index 0000000..dc6f74f
--- /dev/null
+++ b/arch/arc/configs/nsim_hs_smp_defconfig
@@ -0,0 +1,63 @@
+CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_DEFAULT_HOSTNAME="ARCLinux"
+# CONFIG_SWAP is not set
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_NAMESPACES=y
+# CONFIG_UTS_NS is not set
+# CONFIG_PID_NS is not set
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_SOURCE="../arc_initramfs_hs/"
+CONFIG_KALLSYMS_ALL=y
+CONFIG_EMBEDDED=y
+# CONFIG_SLUB_DEBUG is not set
+# CONFIG_COMPAT_BRK is not set
+CONFIG_KPROBES=y
+CONFIG_MODULES=y
+# CONFIG_LBDAF is not set
+# CONFIG_BLK_DEV_BSG is not set
+# CONFIG_IOSCHED_DEADLINE is not set
+# CONFIG_IOSCHED_CFQ is not set
+CONFIG_ARC_PLAT_SIM=y
+CONFIG_ARC_BOARD_ML509=y
+CONFIG_ISA_ARCV2=y
+CONFIG_SMP=y
+CONFIG_ARC_BUILTIN_DTB_NAME="nsim_hs_idu"
+CONFIG_PREEMPT=y
+# CONFIG_COMPACTION is not set
+# CONFIG_CROSS_MEMORY_ATTACH is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_UNIX_DIAG=y
+CONFIG_NET_KEY=y
+CONFIG_INET=y
+# CONFIG_IPV6 is not set
+# CONFIG_STANDALONE is not set
+# CONFIG_PREVENT_FIRMWARE_BUILD is not set
+# CONFIG_FIRMWARE_IN_KERNEL is not set
+# CONFIG_BLK_DEV is not set
+# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_SERIO is not set
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_DEVKMEM is not set
+CONFIG_SERIAL_ARC=y
+CONFIG_SERIAL_ARC_CONSOLE=y
+# CONFIG_HW_RANDOM is not set
+# CONFIG_HWMON is not set
+# CONFIG_VGA_CONSOLE is not set
+# CONFIG_HID is not set
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT2_FS=y
+CONFIG_EXT2_FS_XATTR=y
+CONFIG_TMPFS=y
+# CONFIG_MISC_FILESYSTEMS is not set
+CONFIG_NFS_FS=y
+# CONFIG_ENABLE_WARN_DEPRECATED is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_XZ_DEC=y
diff --git a/arch/arc/configs/nsimosci_defconfig b/arch/arc/configs/nsimosci_defconfig
index d2ac4e5..31e1d95 100644
--- a/arch/arc/configs/nsimosci_defconfig
+++ b/arch/arc/configs/nsimosci_defconfig
@@ -1,4 +1,4 @@
-CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
+CONFIG_CROSS_COMPILE="arc-linux-"
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_DEFAULT_HOSTNAME="ARCLinux"
# CONFIG_SWAP is not set
@@ -23,8 +23,7 @@
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_IOSCHED_DEADLINE is not set
# CONFIG_IOSCHED_CFQ is not set
-CONFIG_ARC_PLAT_FPGA_LEGACY=y
-# CONFIG_ARC_HAS_RTSC is not set
+CONFIG_ARC_PLAT_SIM=y
CONFIG_ARC_BUILTIN_DTB_NAME="nsimosci"
# CONFIG_COMPACTION is not set
CONFIG_NET=y
diff --git a/arch/arc/configs/nsimosci_hs_defconfig b/arch/arc/configs/nsimosci_hs_defconfig
new file mode 100644
index 0000000..3fef0a2
--- /dev/null
+++ b/arch/arc/configs/nsimosci_hs_defconfig
@@ -0,0 +1,73 @@
+CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_DEFAULT_HOSTNAME="ARCLinux"
+# CONFIG_SWAP is not set
+CONFIG_SYSVIPC=y
+# CONFIG_CROSS_MEMORY_ATTACH is not set
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_NAMESPACES=y
+# CONFIG_UTS_NS is not set
+# CONFIG_PID_NS is not set
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_SOURCE="../arc_initramfs_hs/"
+CONFIG_KALLSYMS_ALL=y
+CONFIG_EMBEDDED=y
+# CONFIG_SLUB_DEBUG is not set
+# CONFIG_COMPAT_BRK is not set
+CONFIG_KPROBES=y
+CONFIG_MODULES=y
+# CONFIG_LBDAF is not set
+# CONFIG_BLK_DEV_BSG is not set
+# CONFIG_IOSCHED_DEADLINE is not set
+# CONFIG_IOSCHED_CFQ is not set
+CONFIG_ARC_PLAT_SIM=y
+CONFIG_ISA_ARCV2=y
+CONFIG_ARC_BUILTIN_DTB_NAME="nsimosci_hs"
+# CONFIG_COMPACTION is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_UNIX_DIAG=y
+CONFIG_NET_KEY=y
+CONFIG_INET=y
+# CONFIG_IPV6 is not set
+# CONFIG_STANDALONE is not set
+# CONFIG_PREVENT_FIRMWARE_BUILD is not set
+# CONFIG_FIRMWARE_IN_KERNEL is not set
+# CONFIG_BLK_DEV is not set
+CONFIG_NETDEVICES=y
+CONFIG_NET_OSCI_LAN=y
+CONFIG_INPUT_EVDEV=y
+# CONFIG_MOUSE_PS2_ALPS is not set
+# CONFIG_MOUSE_PS2_LOGIPS2PP is not set
+# CONFIG_MOUSE_PS2_SYNAPTICS is not set
+# CONFIG_MOUSE_PS2_TRACKPOINT is not set
+CONFIG_MOUSE_PS2_TOUCHKIT=y
+# CONFIG_SERIO_SERPORT is not set
+CONFIG_SERIO_ARC_PS2=y
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_DEVKMEM is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_NR_UARTS=1
+CONFIG_SERIAL_8250_RUNTIME_UARTS=1
+CONFIG_SERIAL_OF_PLATFORM=y
+# CONFIG_HW_RANDOM is not set
+# CONFIG_HWMON is not set
+CONFIG_FB=y
+# CONFIG_VGA_CONSOLE is not set
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_LOGO=y
+# CONFIG_HID is not set
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT2_FS=y
+CONFIG_EXT2_FS_XATTR=y
+CONFIG_TMPFS=y
+# CONFIG_MISC_FILESYSTEMS is not set
+CONFIG_NFS_FS=y
+# CONFIG_ENABLE_WARN_DEPRECATED is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
diff --git a/arch/arc/configs/nsimosci_hs_smp_defconfig b/arch/arc/configs/nsimosci_hs_smp_defconfig
new file mode 100644
index 0000000..5178483
--- /dev/null
+++ b/arch/arc/configs/nsimosci_hs_smp_defconfig
@@ -0,0 +1,93 @@
+CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
+CONFIG_DEFAULT_HOSTNAME="ARCLinux"
+# CONFIG_SWAP is not set
+CONFIG_SYSVIPC=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+# CONFIG_UTS_NS is not set
+# CONFIG_PID_NS is not set
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_SOURCE="../arc_initramfs_hs/"
+# CONFIG_COMPAT_BRK is not set
+CONFIG_KPROBES=y
+CONFIG_MODULES=y
+# CONFIG_LBDAF is not set
+# CONFIG_BLK_DEV_BSG is not set
+# CONFIG_IOSCHED_DEADLINE is not set
+# CONFIG_IOSCHED_CFQ is not set
+CONFIG_ARC_PLAT_SIM=y
+CONFIG_ARC_BOARD_ML509=y
+CONFIG_ISA_ARCV2=y
+CONFIG_SMP=y
+CONFIG_ARC_HAS_LL64=y
+# CONFIG_ARC_HAS_RTSC is not set
+CONFIG_ARC_BUILTIN_DTB_NAME="nsimosci_hs_idu"
+CONFIG_PREEMPT=y
+# CONFIG_COMPACTION is not set
+# CONFIG_CROSS_MEMORY_ATTACH is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_PACKET_DIAG=y
+CONFIG_UNIX=y
+CONFIG_UNIX_DIAG=y
+CONFIG_NET_KEY=y
+CONFIG_INET=y
+# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
+# CONFIG_INET_XFRM_MODE_TUNNEL is not set
+# CONFIG_INET_XFRM_MODE_BEET is not set
+# CONFIG_INET_LRO is not set
+# CONFIG_IPV6 is not set
+# CONFIG_WIRELESS is not set
+# CONFIG_STANDALONE is not set
+# CONFIG_PREVENT_FIRMWARE_BUILD is not set
+# CONFIG_FIRMWARE_IN_KERNEL is not set
+# CONFIG_BLK_DEV is not set
+CONFIG_NETDEVICES=y
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_CADENCE is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+# CONFIG_NET_VENDOR_STMICRO is not set
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+CONFIG_NET_OSCI_LAN=y
+# CONFIG_WLAN is not set
+CONFIG_INPUT_EVDEV=y
+CONFIG_MOUSE_PS2_TOUCHKIT=y
+# CONFIG_SERIO_SERPORT is not set
+CONFIG_SERIO_LIBPS2=y
+CONFIG_SERIO_ARC_PS2=y
+CONFIG_VT_HW_CONSOLE_BINDING=y
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_DEVKMEM is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_NR_UARTS=1
+CONFIG_SERIAL_8250_RUNTIME_UARTS=1
+CONFIG_SERIAL_8250_DW=y
+CONFIG_SERIAL_OF_PLATFORM=y
+# CONFIG_HW_RANDOM is not set
+# CONFIG_HWMON is not set
+CONFIG_FB=y
+CONFIG_ARCPGU_RGB888=y
+CONFIG_ARCPGU_DISPTYPE=0
+# CONFIG_VGA_CONSOLE is not set
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_LOGO=y
+# CONFIG_HID is not set
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT2_FS=y
+CONFIG_EXT2_FS_XATTR=y
+CONFIG_TMPFS=y
+# CONFIG_MISC_FILESYSTEMS is not set
+CONFIG_NFS_FS=y
+# CONFIG_ENABLE_WARN_DEPRECATED is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_FTRACE=y
diff --git a/arch/arc/configs/tb10x_defconfig b/arch/arc/configs/tb10x_defconfig
index 6be6492..3b4dc9c 100644
--- a/arch/arc/configs/tb10x_defconfig
+++ b/arch/arc/configs/tb10x_defconfig
@@ -1,4 +1,4 @@
-CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
+CONFIG_CROSS_COMPILE="arc-linux-"
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_DEFAULT_HOSTNAME="tb10x"
CONFIG_SYSVIPC=y
@@ -26,7 +26,6 @@
# CONFIG_BLOCK is not set
CONFIG_ARC_PLAT_TB10X=y
CONFIG_ARC_CACHE_LINE_SHIFT=5
-# CONFIG_ARC_HAS_RTSC is not set
CONFIG_ARC_STACK_NONEXEC=y
CONFIG_HZ=250
CONFIG_ARC_BUILTIN_DTB_NAME="abilis_tb100_dvk"
diff --git a/arch/arc/configs/vdk_hs38_defconfig b/arch/arc/configs/vdk_hs38_defconfig
new file mode 100644
index 0000000..ef35ef3
--- /dev/null
+++ b/arch/arc/configs/vdk_hs38_defconfig
@@ -0,0 +1,102 @@
+CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_DEFAULT_HOSTNAME="ARCLinux"
+# CONFIG_CROSS_MEMORY_ATTACH is not set
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_EMBEDDED=y
+CONFIG_PERF_EVENTS=y
+# CONFIG_VM_EVENT_COUNTERS is not set
+# CONFIG_SLUB_DEBUG is not set
+# CONFIG_COMPAT_BRK is not set
+CONFIG_PARTITION_ADVANCED=y
+CONFIG_ARC_PLAT_AXS10X=y
+CONFIG_AXS103=y
+CONFIG_ISA_ARCV2=y
+CONFIG_ARC_UBOOT_SUPPORT=y
+CONFIG_ARC_BUILTIN_DTB_NAME="vdk_hs38"
+CONFIG_PREEMPT=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_NET_KEY=y
+CONFIG_INET=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+# CONFIG_IPV6 is not set
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_STANDALONE is not set
+# CONFIG_PREVENT_FIRMWARE_BUILD is not set
+# CONFIG_FIRMWARE_IN_KERNEL is not set
+CONFIG_MTD=y
+CONFIG_MTD_CMDLINE_PARTS=y
+CONFIG_MTD_BLOCK=y
+CONFIG_MTD_SLRAM=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_SCSI=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_NETDEVICES=y
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+CONFIG_STMMAC_ETH=y
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+CONFIG_NATIONAL_PHY=y
+CONFIG_MOUSE_PS2_TOUCHKIT=y
+CONFIG_SERIO_ARC_PS2=y
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_DEVKMEM is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_DW=y
+CONFIG_SERIAL_OF_PLATFORM=y
+# CONFIG_HW_RANDOM is not set
+# CONFIG_HWMON is not set
+CONFIG_FB=y
+CONFIG_ARCPGU_RGB888=y
+CONFIG_ARCPGU_DISPTYPE=0
+# CONFIG_VGA_CONSOLE is not set
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
+CONFIG_LOGO=y
+# CONFIG_LOGO_LINUX_MONO is not set
+# CONFIG_LOGO_LINUX_VGA16 is not set
+# CONFIG_LOGO_LINUX_CLUT224 is not set
+CONFIG_USB=y
+CONFIG_USB_EHCI_HCD=y
+# CONFIG_USB_EHCI_TT_NEWSCHED is not set
+CONFIG_USB_EHCI_HCD_PLATFORM=y
+CONFIG_USB_OHCI_HCD=y
+CONFIG_USB_OHCI_HCD_PLATFORM=y
+CONFIG_USB_STORAGE=y
+CONFIG_USB_SERIAL=y
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT3_FS=y
+CONFIG_EXT4_FS=y
+CONFIG_MSDOS_FS=y
+CONFIG_VFAT_FS=y
+CONFIG_NTFS_FS=y
+CONFIG_TMPFS=y
+CONFIG_JFFS2_FS=y
+CONFIG_NFS_FS=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+# CONFIG_ENABLE_WARN_DEPRECATED is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_STRIP_ASM_SYMS=y
+CONFIG_DEBUG_SHIRQ=y
+CONFIG_LOCKUP_DETECTOR=y
+CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
+# CONFIG_SCHED_DEBUG is not set
+# CONFIG_DEBUG_PREEMPT is not set
+# CONFIG_FTRACE is not set
diff --git a/arch/arc/configs/vdk_hs38_smp_defconfig b/arch/arc/configs/vdk_hs38_smp_defconfig
new file mode 100644
index 0000000..634509e
--- /dev/null
+++ b/arch/arc/configs/vdk_hs38_smp_defconfig
@@ -0,0 +1,104 @@
+CONFIG_CROSS_COMPILE="arc-linux-uclibc-"
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_DEFAULT_HOSTNAME="ARCLinux"
+# CONFIG_CROSS_MEMORY_ATTACH is not set
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_EMBEDDED=y
+CONFIG_PERF_EVENTS=y
+# CONFIG_VM_EVENT_COUNTERS is not set
+# CONFIG_SLUB_DEBUG is not set
+# CONFIG_COMPAT_BRK is not set
+CONFIG_PARTITION_ADVANCED=y
+CONFIG_ARC_PLAT_AXS10X=y
+CONFIG_AXS103=y
+CONFIG_ISA_ARCV2=y
+CONFIG_SMP=y
+# CONFIG_ARC_HAS_GRTC is not set
+CONFIG_ARC_UBOOT_SUPPORT=y
+CONFIG_ARC_BUILTIN_DTB_NAME="vdk_hs38_smp"
+CONFIG_PREEMPT=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_NET_KEY=y
+CONFIG_INET=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+# CONFIG_IPV6 is not set
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_STANDALONE is not set
+# CONFIG_PREVENT_FIRMWARE_BUILD is not set
+# CONFIG_FIRMWARE_IN_KERNEL is not set
+CONFIG_MTD=y
+CONFIG_MTD_CMDLINE_PARTS=y
+CONFIG_MTD_BLOCK=y
+CONFIG_MTD_SLRAM=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_SCSI=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_NETDEVICES=y
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+CONFIG_STMMAC_ETH=y
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+CONFIG_NATIONAL_PHY=y
+CONFIG_MOUSE_PS2_TOUCHKIT=y
+CONFIG_SERIO_ARC_PS2=y
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_DEVKMEM is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_DW=y
+CONFIG_SERIAL_OF_PLATFORM=y
+# CONFIG_HW_RANDOM is not set
+# CONFIG_HWMON is not set
+CONFIG_FB=y
+CONFIG_ARCPGU_RGB888=y
+CONFIG_ARCPGU_DISPTYPE=0
+# CONFIG_VGA_CONSOLE is not set
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
+CONFIG_LOGO=y
+# CONFIG_LOGO_LINUX_MONO is not set
+# CONFIG_LOGO_LINUX_VGA16 is not set
+# CONFIG_LOGO_LINUX_CLUT224 is not set
+CONFIG_USB=y
+CONFIG_USB_EHCI_HCD=y
+# CONFIG_USB_EHCI_TT_NEWSCHED is not set
+CONFIG_USB_EHCI_HCD_PLATFORM=y
+CONFIG_USB_OHCI_HCD=y
+CONFIG_USB_OHCI_HCD_PLATFORM=y
+CONFIG_USB_STORAGE=y
+CONFIG_USB_SERIAL=y
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT3_FS=y
+CONFIG_EXT4_FS=y
+CONFIG_MSDOS_FS=y
+CONFIG_VFAT_FS=y
+CONFIG_NTFS_FS=y
+CONFIG_TMPFS=y
+CONFIG_JFFS2_FS=y
+CONFIG_NFS_FS=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+# CONFIG_ENABLE_WARN_DEPRECATED is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_STRIP_ASM_SYMS=y
+CONFIG_DEBUG_SHIRQ=y
+CONFIG_LOCKUP_DETECTOR=y
+CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
+# CONFIG_SCHED_DEBUG is not set
+# CONFIG_DEBUG_PREEMPT is not set
+# CONFIG_FTRACE is not set
diff --git a/arch/arc/include/asm/Kbuild b/arch/arc/include/asm/Kbuild
index 769b312..1a80cc9 100644
--- a/arch/arc/include/asm/Kbuild
+++ b/arch/arc/include/asm/Kbuild
@@ -1,5 +1,4 @@
generic-y += auxvec.h
-generic-y += barrier.h
generic-y += bitsperlong.h
generic-y += bugs.h
generic-y += clkdev.h
diff --git a/arch/arc/include/asm/arcregs.h b/arch/arc/include/asm/arcregs.h
index e2b1b121..070f588 100644
--- a/arch/arc/include/asm/arcregs.h
+++ b/arch/arc/include/asm/arcregs.h
@@ -16,6 +16,8 @@
#define ARC_REG_PERIBASE_BCR 0x69
#define ARC_REG_FP_BCR 0x6B /* ARCompact: Single-Precision FPU */
#define ARC_REG_DPFP_BCR 0x6C /* ARCompact: Dbl Precision FPU */
+#define ARC_REG_FP_V2_BCR 0xc8 /* ARCv2 FPU */
+#define ARC_REG_SLC_BCR 0xce
#define ARC_REG_DCCM_BCR 0x74 /* DCCM Present + SZ */
#define ARC_REG_TIMERS_BCR 0x75
#define ARC_REG_AP_BCR 0x76
@@ -31,6 +33,7 @@
#define ARC_REG_BPU_BCR 0xc0
#define ARC_REG_ISA_CFG_BCR 0xc1
#define ARC_REG_RTT_BCR 0xF2
+#define ARC_REG_IRQ_BCR 0xF3
#define ARC_REG_SMART_BCR 0xFF
/* status32 Bits Positions */
@@ -51,6 +54,7 @@
* [15: 8] = Exception Cause Code
* [ 7: 0] = Exception Parameters (for certain types only)
*/
+#ifdef CONFIG_ISA_ARCOMPACT
#define ECR_V_MEM_ERR 0x01
#define ECR_V_INSN_ERR 0x02
#define ECR_V_MACH_CHK 0x20
@@ -58,6 +62,15 @@
#define ECR_V_DTLB_MISS 0x22
#define ECR_V_PROTV 0x23
#define ECR_V_TRAP 0x25
+#else
+#define ECR_V_MEM_ERR 0x01
+#define ECR_V_INSN_ERR 0x02
+#define ECR_V_MACH_CHK 0x03
+#define ECR_V_ITLB_MISS 0x04
+#define ECR_V_DTLB_MISS 0x05
+#define ECR_V_PROTV 0x06
+#define ECR_V_TRAP 0x09
+#endif
/* DTLB Miss and Protection Violation Cause Codes */
@@ -76,9 +89,6 @@
#define ECR_C_BIT_DTLB_LD_MISS 8
#define ECR_C_BIT_DTLB_ST_MISS 9
-/* Dummy ECR values for Interrupts */
-#define event_IRQ1 0x0031abcd
-#define event_IRQ2 0x0032abcd
/* Auxiliary registers */
#define AUX_IDENTITY 4
@@ -204,9 +214,11 @@
struct bcr_isa {
#ifdef CONFIG_CPU_BIG_ENDIAN
- unsigned int pad1:23, atomic1:1, ver:8;
+ unsigned int div_rem:4, pad2:4, ldd:1, unalign:1, atomic:1, be:1,
+ pad1:11, atomic1:1, ver:8;
#else
- unsigned int ver:8, atomic1:1, pad1:23;
+ unsigned int ver:8, atomic1:1, pad1:11, be:1, atomic:1, unalign:1,
+ ldd:1, pad2:4, div_rem:4;
#endif
};
@@ -269,11 +281,19 @@
#endif
};
+struct bcr_fp_arcv2 {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad2:15, dp:1, pad1:7, sp:1, ver:8;
+#else
+ unsigned int ver:8, sp:1, pad1:7, dp:1, pad2:15;
+#endif
+};
+
struct bcr_timer {
#ifdef CONFIG_CPU_BIG_ENDIAN
- unsigned int pad2:15, rtsc:1, pad1:6, t1:1, t0:1, ver:8;
+ unsigned int pad2:15, rtsc:1, pad1:5, rtc:1, t1:1, t0:1, ver:8;
#else
- unsigned int ver:8, t0:1, t1:1, pad1:6, rtsc:1, pad2:15;
+ unsigned int ver:8, t0:1, t1:1, rtc:1, pad1:5, rtsc:1, pad2:15;
#endif
};
@@ -285,6 +305,14 @@
#endif
};
+struct bcr_bpu_arcv2 {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad:6, fbe:2, tqe:2, ts:4, ft:1, rse:2, pte:3, bce:3, ver:8;
+#else
+ unsigned int ver:8, bce:3, pte:3, rse:2, ft:1, ts:4, tqe:2, fbe:2, pad:6;
+#endif
+};
+
struct bcr_generic {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int pad:24, ver:8;
@@ -299,11 +327,12 @@
*/
struct cpuinfo_arc_mmu {
- unsigned int ver, pg_sz, sets, ways, u_dtlb, u_itlb, num_tlb;
+ unsigned int ver:4, pg_sz_k:8, s_pg_sz_m:8, u_dtlb:6, u_itlb:6;
+ unsigned int num_tlb:16, sets:12, ways:4;
};
struct cpuinfo_arc_cache {
- unsigned int sz_k:8, line_len:8, assoc:4, ver:4, alias:1, vipt:1, pad:6;
+ unsigned int sz_k:14, line_len:8, assoc:4, ver:4, alias:1, vipt:1;
};
struct cpuinfo_arc_bpu {
@@ -315,14 +344,13 @@
};
struct cpuinfo_arc {
- struct cpuinfo_arc_cache icache, dcache;
+ struct cpuinfo_arc_cache icache, dcache, slc;
struct cpuinfo_arc_mmu mmu;
struct cpuinfo_arc_bpu bpu;
struct bcr_identity core;
struct bcr_isa isa;
struct bcr_timer timers;
unsigned int vec_base;
- unsigned int uncached_base;
struct cpuinfo_arc_ccm iccm, dccm;
struct {
unsigned int swap:1, norm:1, minmax:1, barrel:1, crc:1, pad1:3,
@@ -336,6 +364,22 @@
extern struct cpuinfo_arc cpuinfo_arc700[];
+static inline int is_isa_arcv2(void)
+{
+ return IS_ENABLED(CONFIG_ISA_ARCV2);
+}
+
+static inline int is_isa_arcompact(void)
+{
+ return IS_ENABLED(CONFIG_ISA_ARCOMPACT);
+}
+
+#if defined(CONFIG_ISA_ARCOMPACT) && !defined(_CPU_DEFAULT_A7)
+#error "Toolchain not configured for ARCompact builds"
+#elif defined(CONFIG_ISA_ARCV2) && !defined(_CPU_DEFAULT_HS)
+#error "Toolchain not configured for ARCv2 builds"
+#endif
+
#endif /* __ASEMBLY__ */
#endif /* _ASM_ARC_ARCREGS_H */
diff --git a/arch/arc/include/asm/atomic.h b/arch/arc/include/asm/atomic.h
index 9917a45..03484cb 100644
--- a/arch/arc/include/asm/atomic.h
+++ b/arch/arc/include/asm/atomic.h
@@ -23,13 +23,21 @@
#define atomic_set(v, i) (((v)->counter) = (i))
+#ifdef CONFIG_ISA_ARCV2
+#define PREFETCHW " prefetchw [%1] \n"
+#else
+#define PREFETCHW
+#endif
+
#define ATOMIC_OP(op, c_op, asm_op) \
static inline void atomic_##op(int i, atomic_t *v) \
{ \
unsigned int temp; \
\
__asm__ __volatile__( \
- "1: llock %0, [%1] \n" \
+ "1: \n" \
+ PREFETCHW \
+ " llock %0, [%1] \n" \
" " #asm_op " %0, %0, %2 \n" \
" scond %0, [%1] \n" \
" bnz 1b \n" \
@@ -43,8 +51,16 @@
{ \
unsigned int temp; \
\
+ /* \
+ * Explicit full memory barrier needed before/after as \
+ * LLOCK/SCOND thmeselves don't provide any such semantics \
+ */ \
+ smp_mb(); \
+ \
__asm__ __volatile__( \
- "1: llock %0, [%1] \n" \
+ "1: \n" \
+ PREFETCHW \
+ " llock %0, [%1] \n" \
" " #asm_op " %0, %0, %2 \n" \
" scond %0, [%1] \n" \
" bnz 1b \n" \
@@ -52,6 +68,8 @@
: "r"(&v->counter), "ir"(i) \
: "cc"); \
\
+ smp_mb(); \
+ \
return temp; \
}
@@ -105,6 +123,9 @@
unsigned long flags; \
unsigned long temp; \
\
+ /* \
+ * spin lock/unlock provides the needed smp_mb() before/after \
+ */ \
atomic_ops_lock(flags); \
temp = v->counter; \
temp c_op i; \
@@ -142,9 +163,19 @@
#define __atomic_add_unless(v, a, u) \
({ \
int c, old; \
+ \
+ /* \
+ * Explicit full memory barrier needed before/after as \
+ * LLOCK/SCOND thmeselves don't provide any such semantics \
+ */ \
+ smp_mb(); \
+ \
c = atomic_read(v); \
while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c)\
c = old; \
+ \
+ smp_mb(); \
+ \
c; \
})
diff --git a/arch/arc/include/asm/barrier.h b/arch/arc/include/asm/barrier.h
new file mode 100644
index 0000000..a720998
--- /dev/null
+++ b/arch/arc/include/asm/barrier.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_BARRIER_H
+#define __ASM_BARRIER_H
+
+#ifdef CONFIG_ISA_ARCV2
+
+/*
+ * ARCv2 based HS38 cores are in-order issue, but still weakly ordered
+ * due to micro-arch buffering/queuing of load/store, cache hit vs. miss ...
+ *
+ * Explicit barrier provided by DMB instruction
+ * - Operand supports fine grained load/store/load+store semantics
+ * - Ensures that selected memory operation issued before it will complete
+ * before any subsequent memory operation of same type
+ * - DMB guarantees SMP as well as local barrier semantics
+ * (asm-generic/barrier.h ensures sane smp_*mb if not defined here, i.e.
+ * UP: barrier(), SMP: smp_*mb == *mb)
+ * - DSYNC provides DMB+completion_of_cache_bpu_maintenance_ops hence not needed
+ * in the general case. Plus it only provides full barrier.
+ */
+
+#define mb() asm volatile("dmb 3\n" : : : "memory")
+#define rmb() asm volatile("dmb 1\n" : : : "memory")
+#define wmb() asm volatile("dmb 2\n" : : : "memory")
+
+#endif
+
+#ifdef CONFIG_ISA_ARCOMPACT
+
+/*
+ * ARCompact based cores (ARC700) only have SYNC instruction which is super
+ * heavy weight as it flushes the pipeline as well.
+ * There are no real SMP implementations of such cores.
+ */
+
+#define mb() asm volatile("sync\n" : : : "memory")
+#endif
+
+#include <asm-generic/barrier.h>
+
+#endif
diff --git a/arch/arc/include/asm/bitops.h b/arch/arc/include/asm/bitops.h
index 4051e95..99fe118 100644
--- a/arch/arc/include/asm/bitops.h
+++ b/arch/arc/include/asm/bitops.h
@@ -18,83 +18,50 @@
#include <linux/types.h>
#include <linux/compiler.h>
#include <asm/barrier.h>
+#ifndef CONFIG_ARC_HAS_LLSC
+#include <asm/smp.h>
+#endif
-/*
- * Hardware assisted read-modify-write using ARC700 LLOCK/SCOND insns.
- * The Kconfig glue ensures that in SMP, this is only set if the container
- * SoC/platform has cross-core coherent LLOCK/SCOND
- */
#if defined(CONFIG_ARC_HAS_LLSC)
-static inline void set_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned int temp;
+/*
+ * Hardware assisted Atomic-R-M-W
+ */
- m += nr >> 5;
-
- /*
- * ARC ISA micro-optimization:
- *
- * Instructions dealing with bitpos only consider lower 5 bits (0-31)
- * e.g (x << 33) is handled like (x << 1) by ASL instruction
- * (mem pointer still needs adjustment to point to next word)
- *
- * Hence the masking to clamp @nr arg can be elided in general.
- *
- * However if @nr is a constant (above assumed it in a register),
- * and greater than 31, gcc can optimize away (x << 33) to 0,
- * as overflow, given the 32-bit ISA. Thus masking needs to be done
- * for constant @nr, but no code is generated due to const prop.
- */
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- __asm__ __volatile__(
- "1: llock %0, [%1] \n"
- " bset %0, %0, %2 \n"
- " scond %0, [%1] \n"
- " bnz 1b \n"
- : "=&r"(temp)
- : "r"(m), "ir"(nr)
- : "cc");
-}
-
-static inline void clear_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned int temp;
-
- m += nr >> 5;
-
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- __asm__ __volatile__(
- "1: llock %0, [%1] \n"
- " bclr %0, %0, %2 \n"
- " scond %0, [%1] \n"
- " bnz 1b \n"
- : "=&r"(temp)
- : "r"(m), "ir"(nr)
- : "cc");
-}
-
-static inline void change_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned int temp;
-
- m += nr >> 5;
-
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- __asm__ __volatile__(
- "1: llock %0, [%1] \n"
- " bxor %0, %0, %2 \n"
- " scond %0, [%1] \n"
- " bnz 1b \n"
- : "=&r"(temp)
- : "r"(m), "ir"(nr)
- : "cc");
+#define BIT_OP(op, c_op, asm_op) \
+static inline void op##_bit(unsigned long nr, volatile unsigned long *m)\
+{ \
+ unsigned int temp; \
+ \
+ m += nr >> 5; \
+ \
+ /* \
+ * ARC ISA micro-optimization: \
+ * \
+ * Instructions dealing with bitpos only consider lower 5 bits \
+ * e.g (x << 33) is handled like (x << 1) by ASL instruction \
+ * (mem pointer still needs adjustment to point to next word) \
+ * \
+ * Hence the masking to clamp @nr arg can be elided in general. \
+ * \
+ * However if @nr is a constant (above assumed in a register), \
+ * and greater than 31, gcc can optimize away (x << 33) to 0, \
+ * as overflow, given the 32-bit ISA. Thus masking needs to be \
+ * done for const @nr, but no code is generated due to gcc \
+ * const prop. \
+ */ \
+ if (__builtin_constant_p(nr)) \
+ nr &= 0x1f; \
+ \
+ __asm__ __volatile__( \
+ "1: llock %0, [%1] \n" \
+ " " #asm_op " %0, %0, %2 \n" \
+ " scond %0, [%1] \n" \
+ " bnz 1b \n" \
+ : "=&r"(temp) /* Early clobber, to prevent reg reuse */ \
+ : "r"(m), /* Not "m": llock only supports reg direct addr mode */ \
+ "ir"(nr) \
+ : "cc"); \
}
/*
@@ -108,75 +75,38 @@
* Since ARC lacks a equivalent h/w primitive, the bit is set unconditionally
* and the old value of bit is returned
*/
-static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned long old, temp;
-
- m += nr >> 5;
-
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- __asm__ __volatile__(
- "1: llock %0, [%2] \n"
- " bset %1, %0, %3 \n"
- " scond %1, [%2] \n"
- " bnz 1b \n"
- : "=&r"(old), "=&r"(temp)
- : "r"(m), "ir"(nr)
- : "cc");
-
- return (old & (1 << nr)) != 0;
-}
-
-static inline int
-test_and_clear_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned int old, temp;
-
- m += nr >> 5;
-
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- __asm__ __volatile__(
- "1: llock %0, [%2] \n"
- " bclr %1, %0, %3 \n"
- " scond %1, [%2] \n"
- " bnz 1b \n"
- : "=&r"(old), "=&r"(temp)
- : "r"(m), "ir"(nr)
- : "cc");
-
- return (old & (1 << nr)) != 0;
-}
-
-static inline int
-test_and_change_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned int old, temp;
-
- m += nr >> 5;
-
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- __asm__ __volatile__(
- "1: llock %0, [%2] \n"
- " bxor %1, %0, %3 \n"
- " scond %1, [%2] \n"
- " bnz 1b \n"
- : "=&r"(old), "=&r"(temp)
- : "r"(m), "ir"(nr)
- : "cc");
-
- return (old & (1 << nr)) != 0;
+#define TEST_N_BIT_OP(op, c_op, asm_op) \
+static inline int test_and_##op##_bit(unsigned long nr, volatile unsigned long *m)\
+{ \
+ unsigned long old, temp; \
+ \
+ m += nr >> 5; \
+ \
+ if (__builtin_constant_p(nr)) \
+ nr &= 0x1f; \
+ \
+ /* \
+ * Explicit full memory barrier needed before/after as \
+ * LLOCK/SCOND themselves don't provide any such smenatic \
+ */ \
+ smp_mb(); \
+ \
+ __asm__ __volatile__( \
+ "1: llock %0, [%2] \n" \
+ " " #asm_op " %1, %0, %3 \n" \
+ " scond %1, [%2] \n" \
+ " bnz 1b \n" \
+ : "=&r"(old), "=&r"(temp) \
+ : "r"(m), "ir"(nr) \
+ : "cc"); \
+ \
+ smp_mb(); \
+ \
+ return (old & (1 << nr)) != 0; \
}
#else /* !CONFIG_ARC_HAS_LLSC */
-#include <asm/smp.h>
-
/*
* Non hardware assisted Atomic-R-M-W
* Locking would change to irq-disabling only (UP) and spinlocks (SMP)
@@ -193,108 +123,43 @@
* at compile time)
*/
-static inline void set_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned long temp, flags;
- m += nr >> 5;
-
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- bitops_lock(flags);
-
- temp = *m;
- *m = temp | (1UL << nr);
-
- bitops_unlock(flags);
+#define BIT_OP(op, c_op, asm_op) \
+static inline void op##_bit(unsigned long nr, volatile unsigned long *m)\
+{ \
+ unsigned long temp, flags; \
+ m += nr >> 5; \
+ \
+ if (__builtin_constant_p(nr)) \
+ nr &= 0x1f; \
+ \
+ /* \
+ * spin lock/unlock provide the needed smp_mb() before/after \
+ */ \
+ bitops_lock(flags); \
+ \
+ temp = *m; \
+ *m = temp c_op (1UL << nr); \
+ \
+ bitops_unlock(flags); \
}
-static inline void clear_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned long temp, flags;
- m += nr >> 5;
-
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- bitops_lock(flags);
-
- temp = *m;
- *m = temp & ~(1UL << nr);
-
- bitops_unlock(flags);
-}
-
-static inline void change_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned long temp, flags;
- m += nr >> 5;
-
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- bitops_lock(flags);
-
- temp = *m;
- *m = temp ^ (1UL << nr);
-
- bitops_unlock(flags);
-}
-
-static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned long old, flags;
- m += nr >> 5;
-
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- bitops_lock(flags);
-
- old = *m;
- *m = old | (1 << nr);
-
- bitops_unlock(flags);
-
- return (old & (1 << nr)) != 0;
-}
-
-static inline int
-test_and_clear_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned long old, flags;
- m += nr >> 5;
-
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- bitops_lock(flags);
-
- old = *m;
- *m = old & ~(1 << nr);
-
- bitops_unlock(flags);
-
- return (old & (1 << nr)) != 0;
-}
-
-static inline int
-test_and_change_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned long old, flags;
- m += nr >> 5;
-
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- bitops_lock(flags);
-
- old = *m;
- *m = old ^ (1 << nr);
-
- bitops_unlock(flags);
-
- return (old & (1 << nr)) != 0;
+#define TEST_N_BIT_OP(op, c_op, asm_op) \
+static inline int test_and_##op##_bit(unsigned long nr, volatile unsigned long *m)\
+{ \
+ unsigned long old, flags; \
+ m += nr >> 5; \
+ \
+ if (__builtin_constant_p(nr)) \
+ nr &= 0x1f; \
+ \
+ bitops_lock(flags); \
+ \
+ old = *m; \
+ *m = old c_op (1 << nr); \
+ \
+ bitops_unlock(flags); \
+ \
+ return (old & (1 << nr)) != 0; \
}
#endif /* CONFIG_ARC_HAS_LLSC */
@@ -303,86 +168,51 @@
* Non atomic variants
**************************************/
-static inline void __set_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned long temp;
- m += nr >> 5;
-
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- temp = *m;
- *m = temp | (1UL << nr);
+#define __BIT_OP(op, c_op, asm_op) \
+static inline void __##op##_bit(unsigned long nr, volatile unsigned long *m) \
+{ \
+ unsigned long temp; \
+ m += nr >> 5; \
+ \
+ if (__builtin_constant_p(nr)) \
+ nr &= 0x1f; \
+ \
+ temp = *m; \
+ *m = temp c_op (1UL << nr); \
}
-static inline void __clear_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned long temp;
- m += nr >> 5;
-
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- temp = *m;
- *m = temp & ~(1UL << nr);
+#define __TEST_N_BIT_OP(op, c_op, asm_op) \
+static inline int __test_and_##op##_bit(unsigned long nr, volatile unsigned long *m)\
+{ \
+ unsigned long old; \
+ m += nr >> 5; \
+ \
+ if (__builtin_constant_p(nr)) \
+ nr &= 0x1f; \
+ \
+ old = *m; \
+ *m = old c_op (1 << nr); \
+ \
+ return (old & (1 << nr)) != 0; \
}
-static inline void __change_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned long temp;
- m += nr >> 5;
+#define BIT_OPS(op, c_op, asm_op) \
+ \
+ /* set_bit(), clear_bit(), change_bit() */ \
+ BIT_OP(op, c_op, asm_op) \
+ \
+ /* test_and_set_bit(), test_and_clear_bit(), test_and_change_bit() */\
+ TEST_N_BIT_OP(op, c_op, asm_op) \
+ \
+ /* __set_bit(), __clear_bit(), __change_bit() */ \
+ __BIT_OP(op, c_op, asm_op) \
+ \
+ /* __test_and_set_bit(), __test_and_clear_bit(), __test_and_change_bit() */\
+ __TEST_N_BIT_OP(op, c_op, asm_op)
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- temp = *m;
- *m = temp ^ (1UL << nr);
-}
-
-static inline int
-__test_and_set_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned long old;
- m += nr >> 5;
-
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- old = *m;
- *m = old | (1 << nr);
-
- return (old & (1 << nr)) != 0;
-}
-
-static inline int
-__test_and_clear_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned long old;
- m += nr >> 5;
-
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- old = *m;
- *m = old & ~(1 << nr);
-
- return (old & (1 << nr)) != 0;
-}
-
-static inline int
-__test_and_change_bit(unsigned long nr, volatile unsigned long *m)
-{
- unsigned long old;
- m += nr >> 5;
-
- if (__builtin_constant_p(nr))
- nr &= 0x1f;
-
- old = *m;
- *m = old ^ (1 << nr);
-
- return (old & (1 << nr)) != 0;
-}
+BIT_OPS(set, |, bset)
+BIT_OPS(clear, & ~, bclr)
+BIT_OPS(change, ^, bxor)
/*
* This routine doesn't need to be atomic.
@@ -402,6 +232,8 @@
return ((mask & *addr) != 0);
}
+#ifdef CONFIG_ISA_ARCOMPACT
+
/*
* Count the number of zeros, starting from MSB
* Helper for fls( ) friends
@@ -494,6 +326,75 @@
return ffs(word) - 1;
}
+#else /* CONFIG_ISA_ARCV2 */
+
+/*
+ * fls = Find Last Set in word
+ * @result: [1-32]
+ * fls(1) = 1, fls(0x80000000) = 32, fls(0) = 0
+ */
+static inline __attribute__ ((const)) int fls(unsigned long x)
+{
+ int n;
+
+ asm volatile(
+ " fls.f %0, %1 \n" /* 0:31; 0(Z) if src 0 */
+ " add.nz %0, %0, 1 \n" /* 0:31 -> 1:32 */
+ : "=r"(n) /* Early clobber not needed */
+ : "r"(x)
+ : "cc");
+
+ return n;
+}
+
+/*
+ * __fls: Similar to fls, but zero based (0-31). Also 0 if no bit set
+ */
+static inline __attribute__ ((const)) int __fls(unsigned long x)
+{
+ /* FLS insn has exactly same semantics as the API */
+ return __builtin_arc_fls(x);
+}
+
+/*
+ * ffs = Find First Set in word (LSB to MSB)
+ * @result: [1-32], 0 if all 0's
+ */
+static inline __attribute__ ((const)) int ffs(unsigned long x)
+{
+ int n;
+
+ asm volatile(
+ " ffs.f %0, %1 \n" /* 0:31; 31(Z) if src 0 */
+ " add.nz %0, %0, 1 \n" /* 0:31 -> 1:32 */
+ " mov.z %0, 0 \n" /* 31(Z)-> 0 */
+ : "=r"(n) /* Early clobber not needed */
+ : "r"(x)
+ : "cc");
+
+ return n;
+}
+
+/*
+ * __ffs: Similar to ffs, but zero based (0-31)
+ */
+static inline __attribute__ ((const)) int __ffs(unsigned long x)
+{
+ int n;
+
+ asm volatile(
+ " ffs.f %0, %1 \n" /* 0:31; 31(Z) if src 0 */
+ " mov.z %0, 0 \n" /* 31(Z)-> 0 */
+ : "=r"(n)
+ : "r"(x)
+ : "cc");
+
+ return n;
+
+}
+
+#endif /* CONFIG_ISA_ARCOMPACT */
+
/*
* ffz = Find First Zero in word.
* @return:[0-31], 32 if all 1's
diff --git a/arch/arc/include/asm/cache.h b/arch/arc/include/asm/cache.h
index 7861255..d67345d 100644
--- a/arch/arc/include/asm/cache.h
+++ b/arch/arc/include/asm/cache.h
@@ -60,7 +60,7 @@
#define ARC_REG_IC_IVIC 0x10
#define ARC_REG_IC_CTRL 0x11
#define ARC_REG_IC_IVIL 0x19
-#if defined(CONFIG_ARC_MMU_V3)
+#if defined(CONFIG_ARC_MMU_V3) || defined(CONFIG_ARC_MMU_V4)
#define ARC_REG_IC_PTAG 0x1E
#endif
@@ -74,12 +74,24 @@
#define ARC_REG_DC_IVDL 0x4A
#define ARC_REG_DC_FLSH 0x4B
#define ARC_REG_DC_FLDL 0x4C
-#if defined(CONFIG_ARC_MMU_V3)
#define ARC_REG_DC_PTAG 0x5C
-#endif
/* Bit val in DC_CTRL */
#define DC_CTRL_INV_MODE_FLUSH 0x40
#define DC_CTRL_FLUSH_STATUS 0x100
+/*System-level cache (L2 cache) related Auxiliary registers */
+#define ARC_REG_SLC_CFG 0x901
+#define ARC_REG_SLC_CTRL 0x903
+#define ARC_REG_SLC_FLUSH 0x904
+#define ARC_REG_SLC_INVALIDATE 0x905
+#define ARC_REG_SLC_RGN_START 0x914
+#define ARC_REG_SLC_RGN_END 0x916
+
+/* Bit val in SLC_CONTROL */
+#define SLC_CTRL_IM 0x040
+#define SLC_CTRL_DISABLE 0x001
+#define SLC_CTRL_BUSY 0x100
+#define SLC_CTRL_RGN_OP_INV 0x200
+
#endif /* _ASM_CACHE_H */
diff --git a/arch/arc/include/asm/cacheflush.h b/arch/arc/include/asm/cacheflush.h
index 6abc497..0992d3d 100644
--- a/arch/arc/include/asm/cacheflush.h
+++ b/arch/arc/include/asm/cacheflush.h
@@ -34,9 +34,7 @@
void flush_icache_range(unsigned long start, unsigned long end);
void __sync_icache_dcache(unsigned long paddr, unsigned long vaddr, int len);
void __inv_icache_page(unsigned long paddr, unsigned long vaddr);
-void ___flush_dcache_page(unsigned long paddr, unsigned long vaddr);
-#define __flush_dcache_page(p, v) \
- ___flush_dcache_page((unsigned long)p, (unsigned long)v)
+void __flush_dcache_page(unsigned long paddr, unsigned long vaddr);
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
diff --git a/arch/arc/include/asm/cmpxchg.h b/arch/arc/include/asm/cmpxchg.h
index 03cd689..44fd531 100644
--- a/arch/arc/include/asm/cmpxchg.h
+++ b/arch/arc/include/asm/cmpxchg.h
@@ -10,6 +10,8 @@
#define __ASM_ARC_CMPXCHG_H
#include <linux/types.h>
+
+#include <asm/barrier.h>
#include <asm/smp.h>
#ifdef CONFIG_ARC_HAS_LLSC
@@ -19,16 +21,25 @@
{
unsigned long prev;
+ /*
+ * Explicit full memory barrier needed before/after as
+ * LLOCK/SCOND thmeselves don't provide any such semantics
+ */
+ smp_mb();
+
__asm__ __volatile__(
"1: llock %0, [%1] \n"
" brne %0, %2, 2f \n"
" scond %3, [%1] \n"
" bnz 1b \n"
"2: \n"
- : "=&r"(prev)
- : "r"(ptr), "ir"(expected),
- "r"(new) /* can't be "ir". scond can't take limm for "b" */
- : "cc");
+ : "=&r"(prev) /* Early clobber, to prevent reg reuse */
+ : "r"(ptr), /* Not "m": llock only supports reg direct addr mode */
+ "ir"(expected),
+ "r"(new) /* can't be "ir". scond can't take LIMM for "b" */
+ : "cc", "memory"); /* so that gcc knows memory is being written here */
+
+ smp_mb();
return prev;
}
@@ -42,6 +53,9 @@
int prev;
volatile unsigned long *p = ptr;
+ /*
+ * spin lock/unlock provide the needed smp_mb() before/after
+ */
atomic_ops_lock(flags);
prev = *p;
if (prev == expected)
@@ -77,12 +91,16 @@
switch (size) {
case 4:
+ smp_mb();
+
__asm__ __volatile__(
" ex %0, [%1] \n"
: "+r"(val)
: "r"(ptr)
: "memory");
+ smp_mb();
+
return val;
}
return __xchg_bad_pointer();
diff --git a/arch/arc/include/asm/delay.h b/arch/arc/include/asm/delay.h
index 43de302..08e7e2a 100644
--- a/arch/arc/include/asm/delay.h
+++ b/arch/arc/include/asm/delay.h
@@ -22,11 +22,10 @@
static inline void __delay(unsigned long loops)
{
__asm__ __volatile__(
- "1: sub.f %0, %0, 1 \n"
- " jpnz 1b \n"
- : "+r"(loops)
- :
- : "cc");
+ " lp 1f \n"
+ " nop \n"
+ "1: \n"
+ : "+l"(loops));
}
extern void __bad_udelay(void);
diff --git a/arch/arc/include/asm/dma-mapping.h b/arch/arc/include/asm/dma-mapping.h
index 45b8e0c..fd6cdb5 100644
--- a/arch/arc/include/asm/dma-mapping.h
+++ b/arch/arc/include/asm/dma-mapping.h
@@ -14,23 +14,6 @@
#include <asm-generic/dma-coherent.h>
#include <asm/cacheflush.h>
-#ifndef CONFIG_ARC_PLAT_NEEDS_CPU_TO_DMA
-/*
- * dma_map_* API take cpu addresses, which is kernel logical address in the
- * untranslated address space (0x8000_0000) based. The dma address (bus addr)
- * ideally needs to be 0x0000_0000 based hence these glue routines.
- * However given that intermediate bus bridges can ignore the high bit, we can
- * do with these routines being no-ops.
- * If a platform/device comes up which sriclty requires 0 based bus addr
- * (e.g. AHB-PCI bridge on Angel4 board), then it can provide it's own versions
- */
-#define plat_dma_addr_to_kernel(dev, addr) ((unsigned long)(addr))
-#define plat_kernel_addr_to_dma(dev, ptr) ((dma_addr_t)(ptr))
-
-#else
-#include <plat/dma_addr.h>
-#endif
-
void *dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp);
@@ -94,7 +77,7 @@
enum dma_data_direction dir)
{
_dma_cache_sync((unsigned long)cpu_addr, size, dir);
- return plat_kernel_addr_to_dma(dev, cpu_addr);
+ return (dma_addr_t)cpu_addr;
}
static inline void
@@ -147,16 +130,14 @@
dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction dir)
{
- _dma_cache_sync(plat_dma_addr_to_kernel(dev, dma_handle), size,
- DMA_FROM_DEVICE);
+ _dma_cache_sync(dma_handle, size, DMA_FROM_DEVICE);
}
static inline void
dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction dir)
{
- _dma_cache_sync(plat_dma_addr_to_kernel(dev, dma_handle), size,
- DMA_TO_DEVICE);
+ _dma_cache_sync(dma_handle, size, DMA_TO_DEVICE);
}
static inline void
@@ -164,8 +145,7 @@
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
- _dma_cache_sync(plat_dma_addr_to_kernel(dev, dma_handle) + offset,
- size, DMA_FROM_DEVICE);
+ _dma_cache_sync(dma_handle + offset, size, DMA_FROM_DEVICE);
}
static inline void
@@ -173,8 +153,7 @@
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
- _dma_cache_sync(plat_dma_addr_to_kernel(dev, dma_handle) + offset,
- size, DMA_TO_DEVICE);
+ _dma_cache_sync(dma_handle + offset, size, DMA_TO_DEVICE);
}
static inline void
diff --git a/arch/arc/include/asm/elf.h b/arch/arc/include/asm/elf.h
index a262828..51a99e2 100644
--- a/arch/arc/include/asm/elf.h
+++ b/arch/arc/include/asm/elf.h
@@ -15,6 +15,11 @@
/* These ELF defines belong to uapi but libc elf.h already defines them */
#define EM_ARCOMPACT 93
+#define EM_ARCV2 195 /* ARCv2 Cores */
+
+#define EM_ARC_INUSE (IS_ENABLED(CONFIG_ISA_ARCOMPACT) ? \
+ EM_ARCOMPACT : EM_ARCV2)
+
/* ARC Relocations (kernel Modules only) */
#define R_ARC_32 0x4
#define R_ARC_32_ME 0x1B
diff --git a/arch/arc/include/asm/entry-arcv2.h b/arch/arc/include/asm/entry-arcv2.h
new file mode 100644
index 0000000..b5ff87e
--- /dev/null
+++ b/arch/arc/include/asm/entry-arcv2.h
@@ -0,0 +1,190 @@
+
+#ifndef __ASM_ARC_ENTRY_ARCV2_H
+#define __ASM_ARC_ENTRY_ARCV2_H
+
+#include <asm/asm-offsets.h>
+#include <asm/irqflags-arcv2.h>
+#include <asm/thread_info.h> /* For THREAD_SIZE */
+
+/*------------------------------------------------------------------------*/
+.macro INTERRUPT_PROLOGUE called_from
+
+ ; Before jumping to Interrupt Vector, hardware micro-ops did following:
+ ; 1. SP auto-switched to kernel mode stack
+ ; 2. STATUS32.Z flag set to U mode at time of interrupt (U:1, K:0)
+ ; 3. Auto saved: r0-r11, blink, LPE,LPS,LPC, JLI,LDI,EI, PC, STAT32
+ ;
+ ; Now manually save: r12, sp, fp, gp, r25
+
+ PUSH r12
+
+ ; Saving pt_regs->sp correctly requires some extra work due to the way
+ ; Auto stack switch works
+ ; - U mode: retrieve it from AUX_USER_SP
+ ; - K mode: add the offset from current SP where H/w starts auto push
+ ;
+ ; Utilize the fact that Z bit is set if Intr taken in U mode
+ mov.nz r9, sp
+ add.nz r9, r9, SZ_PT_REGS - PT_sp - 4
+ bnz 1f
+
+ lr r9, [AUX_USER_SP]
+1:
+ PUSH r9 ; SP
+
+ PUSH fp
+ PUSH gp
+
+#ifdef CONFIG_ARC_CURR_IN_REG
+ PUSH r25 ; user_r25
+ GET_CURR_TASK_ON_CPU r25
+#else
+ sub sp, sp, 4
+#endif
+
+.ifnc \called_from, exception
+ sub sp, sp, 12 ; BTA/ECR/orig_r0 placeholder per pt_regs
+.endif
+
+.endm
+
+/*------------------------------------------------------------------------*/
+.macro INTERRUPT_EPILOGUE called_from
+
+.ifnc \called_from, exception
+ add sp, sp, 12 ; skip BTA/ECR/orig_r0 placeholderss
+.endif
+
+#ifdef CONFIG_ARC_CURR_IN_REG
+ POP r25
+#else
+ add sp, sp, 4
+#endif
+
+ POP gp
+ POP fp
+
+ ; Don't touch AUX_USER_SP if returning to K mode (Z bit set)
+ ; (Z bit set on K mode is inverse of INTERRUPT_PROLOGUE)
+ add.z sp, sp, 4
+ bz 1f
+
+ POPAX AUX_USER_SP
+1:
+ POP r12
+
+.endm
+
+/*------------------------------------------------------------------------*/
+.macro EXCEPTION_PROLOGUE
+
+ ; Before jumping to Exception Vector, hardware micro-ops did following:
+ ; 1. SP auto-switched to kernel mode stack
+ ; 2. STATUS32.Z flag set to U mode at time of interrupt (U:1,K:0)
+ ;
+ ; Now manually save the complete reg file
+
+ PUSH r9 ; freeup a register: slot of erstatus
+
+ PUSHAX eret
+ sub sp, sp, 12 ; skip JLI, LDI, EI
+ PUSH lp_count
+ PUSHAX lp_start
+ PUSHAX lp_end
+ PUSH blink
+
+ PUSH r11
+ PUSH r10
+
+ ld.as r9, [sp, 10] ; load stashed r9 (status32 stack slot)
+ lr r10, [erstatus]
+ st.as r10, [sp, 10] ; save status32 at it's right stack slot
+
+ PUSH r9
+ PUSH r8
+ PUSH r7
+ PUSH r6
+ PUSH r5
+ PUSH r4
+ PUSH r3
+ PUSH r2
+ PUSH r1
+ PUSH r0
+
+ ; -- for interrupts, regs above are auto-saved by h/w in that order --
+ ; Now do what ISR prologue does (manually save r12, sp, fp, gp, r25)
+ ;
+ ; Set Z flag if this was from U mode (expected by INTERRUPT_PROLOGUE)
+ ; Although H/w exception micro-ops do set Z flag for U mode (just like
+ ; for interrupts), it could get clobbered in case we soft land here from
+ ; a TLB Miss exception handler (tlbex.S)
+
+ and r10, r10, STATUS_U_MASK
+ xor.f 0, r10, STATUS_U_MASK
+
+ INTERRUPT_PROLOGUE exception
+
+ PUSHAX erbta
+ PUSHAX ecr ; r9 contains ECR, expected by EV_Trap
+
+ PUSH r0 ; orig_r0
+.endm
+
+/*------------------------------------------------------------------------*/
+.macro EXCEPTION_EPILOGUE
+
+ ; Assumes r0 has PT_status32
+ btst r0, STATUS_U_BIT ; Z flag set if K, used in INTERRUPT_EPILOGUE
+
+ add sp, sp, 8 ; orig_r0/ECR don't need restoring
+ POPAX erbta
+
+ INTERRUPT_EPILOGUE exception
+
+ POP r0
+ POP r1
+ POP r2
+ POP r3
+ POP r4
+ POP r5
+ POP r6
+ POP r7
+ POP r8
+ POP r9
+ POP r10
+ POP r11
+
+ POP blink
+ POPAX lp_end
+ POPAX lp_start
+
+ POP r9
+ mov lp_count, r9
+
+ add sp, sp, 12 ; skip JLI, LDI, EI
+ POPAX eret
+ POPAX erstatus
+
+ ld.as r9, [sp, -12] ; reload r9 which got clobbered
+.endm
+
+.macro FAKE_RET_FROM_EXCPN
+ lr r9, [status32]
+ bic r9, r9, (STATUS_U_MASK|STATUS_DE_MASK|STATUS_AE_MASK)
+ or r9, r9, (STATUS_L_MASK|STATUS_IE_MASK)
+ kflag r9
+.endm
+
+/* Get thread_info of "current" tsk */
+.macro GET_CURR_THR_INFO_FROM_SP reg
+ bmskn \reg, sp, THREAD_SHIFT - 1
+.endm
+
+/* Get CPU-ID of this core */
+.macro GET_CPU_ID reg
+ lr \reg, [identity]
+ xbfu \reg, \reg, 0xE8 /* 00111 01000 */
+ /* M = 8-1 N = 8 */
+.endm
+
+#endif
diff --git a/arch/arc/include/asm/entry-compact.h b/arch/arc/include/asm/entry-compact.h
new file mode 100644
index 0000000..415443c
--- /dev/null
+++ b/arch/arc/include/asm/entry-compact.h
@@ -0,0 +1,307 @@
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Vineetg: March 2009 (Supporting 2 levels of Interrupts)
+ * Stack switching code can no longer reliably rely on the fact that
+ * if we are NOT in user mode, stack is switched to kernel mode.
+ * e.g. L2 IRQ interrupted a L1 ISR which had not yet completed
+ * it's prologue including stack switching from user mode
+ *
+ * Vineetg: Aug 28th 2008: Bug #94984
+ * -Zero Overhead Loop Context shd be cleared when entering IRQ/EXcp/Trap
+ * Normally CPU does this automatically, however when doing FAKE rtie,
+ * we also need to explicitly do this. The problem in macros
+ * FAKE_RET_FROM_EXCPN and FAKE_RET_FROM_EXCPN_LOCK_IRQ was that this bit
+ * was being "CLEARED" rather then "SET". Actually "SET" clears ZOL context
+ *
+ * Vineetg: May 5th 2008
+ * -Modified CALLEE_REG save/restore macros to handle the fact that
+ * r25 contains the kernel current task ptr
+ * - Defined Stack Switching Macro to be reused in all intr/excp hdlrs
+ * - Shaved off 11 instructions from RESTORE_ALL_INT1 by using the
+ * address Write back load ld.ab instead of seperate ld/add instn
+ *
+ * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
+ */
+
+#ifndef __ASM_ARC_ENTRY_COMPACT_H
+#define __ASM_ARC_ENTRY_COMPACT_H
+
+#include <asm/asm-offsets.h>
+#include <asm/irqflags-compact.h>
+#include <asm/thread_info.h> /* For THREAD_SIZE */
+
+/*--------------------------------------------------------------
+ * Switch to Kernel Mode stack if SP points to User Mode stack
+ *
+ * Entry : r9 contains pre-IRQ/exception/trap status32
+ * Exit : SP set to K mode stack
+ * SP at the time of entry (K/U) saved @ pt_regs->sp
+ * Clobbers: r9
+ *-------------------------------------------------------------*/
+
+.macro SWITCH_TO_KERNEL_STK
+
+ /* User Mode when this happened ? Yes: Proceed to switch stack */
+ bbit1 r9, STATUS_U_BIT, 88f
+
+ /* OK we were already in kernel mode when this event happened, thus can
+ * assume SP is kernel mode SP. _NO_ need to do any stack switching
+ */
+
+#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
+ /* However....
+ * If Level 2 Interrupts enabled, we may end up with a corner case:
+ * 1. User Task executing
+ * 2. L1 IRQ taken, ISR starts (CPU auto-switched to KERNEL mode)
+ * 3. But before it could switch SP from USER to KERNEL stack
+ * a L2 IRQ "Interrupts" L1
+ * Thay way although L2 IRQ happened in Kernel mode, stack is still
+ * not switched.
+ * To handle this, we may need to switch stack even if in kernel mode
+ * provided SP has values in range of USER mode stack ( < 0x7000_0000 )
+ */
+ brlo sp, VMALLOC_START, 88f
+
+ /* TODO: vineetg:
+ * We need to be a bit more cautious here. What if a kernel bug in
+ * L1 ISR, caused SP to go whaco (some small value which looks like
+ * USER stk) and then we take L2 ISR.
+ * Above brlo alone would treat it as a valid L1-L2 sceanrio
+ * instead of shouting alound
+ * The only feasible way is to make sure this L2 happened in
+ * L1 prelogue ONLY i.e. ilink2 is less than a pre-set marker in
+ * L1 ISR before it switches stack
+ */
+
+#endif
+
+ /*------Intr/Ecxp happened in kernel mode, SP already setup ------ */
+ /* save it nevertheless @ pt_regs->sp for uniformity */
+
+ b.d 66f
+ st sp, [sp, PT_sp - SZ_PT_REGS]
+
+88: /*------Intr/Ecxp happened in user mode, "switch" stack ------ */
+
+ GET_CURR_TASK_ON_CPU r9
+
+ /* With current tsk in r9, get it's kernel mode stack base */
+ GET_TSK_STACK_BASE r9, r9
+
+ /* save U mode SP @ pt_regs->sp */
+ st sp, [r9, PT_sp - SZ_PT_REGS]
+
+ /* final SP switch */
+ mov sp, r9
+66:
+.endm
+
+/*------------------------------------------------------------
+ * "FAKE" a rtie to return from CPU Exception context
+ * This is to re-enable Exceptions within exception
+ * Look at EV_ProtV to see how this is actually used
+ *-------------------------------------------------------------*/
+
+.macro FAKE_RET_FROM_EXCPN
+
+ ld r9, [sp, PT_status32]
+ bic r9, r9, (STATUS_U_MASK|STATUS_DE_MASK)
+ bset r9, r9, STATUS_L_BIT
+ sr r9, [erstatus]
+ mov r9, 55f
+ sr r9, [eret]
+
+ rtie
+55:
+.endm
+
+/*--------------------------------------------------------------
+ * For early Exception/ISR Prologue, a core reg is temporarily needed to
+ * code the rest of prolog (stack switching). This is done by stashing
+ * it to memory (non-SMP case) or SCRATCH0 Aux Reg (SMP).
+ *
+ * Before saving the full regfile - this reg is restored back, only
+ * to be saved again on kernel mode stack, as part of pt_regs.
+ *-------------------------------------------------------------*/
+.macro PROLOG_FREEUP_REG reg, mem
+#ifdef CONFIG_SMP
+ sr \reg, [ARC_REG_SCRATCH_DATA0]
+#else
+ st \reg, [\mem]
+#endif
+.endm
+
+.macro PROLOG_RESTORE_REG reg, mem
+#ifdef CONFIG_SMP
+ lr \reg, [ARC_REG_SCRATCH_DATA0]
+#else
+ ld \reg, [\mem]
+#endif
+.endm
+
+/*--------------------------------------------------------------
+ * Exception Entry prologue
+ * -Switches stack to K mode (if not already)
+ * -Saves the register file
+ *
+ * After this it is safe to call the "C" handlers
+ *-------------------------------------------------------------*/
+.macro EXCEPTION_PROLOGUE
+
+ /* Need at least 1 reg to code the early exception prologue */
+ PROLOG_FREEUP_REG r9, @ex_saved_reg1
+
+ /* U/K mode at time of exception (stack not switched if already K) */
+ lr r9, [erstatus]
+
+ /* ARC700 doesn't provide auto-stack switching */
+ SWITCH_TO_KERNEL_STK
+
+#ifdef CONFIG_ARC_CURR_IN_REG
+ /* Treat r25 as scratch reg (save on stack) and load with "current" */
+ PUSH r25
+ GET_CURR_TASK_ON_CPU r25
+#else
+ sub sp, sp, 4
+#endif
+
+ st.a r0, [sp, -8] /* orig_r0 needed for syscall (skip ECR slot) */
+ sub sp, sp, 4 /* skip pt_regs->sp, already saved above */
+
+ /* Restore r9 used to code the early prologue */
+ PROLOG_RESTORE_REG r9, @ex_saved_reg1
+
+ /* now we are ready to save the regfile */
+ SAVE_R0_TO_R12
+ PUSH gp
+ PUSH fp
+ PUSH blink
+ PUSHAX eret
+ PUSHAX erstatus
+ PUSH lp_count
+ PUSHAX lp_end
+ PUSHAX lp_start
+ PUSHAX erbta
+
+ lr r9, [ecr]
+ st r9, [sp, PT_event] /* EV_Trap expects r9 to have ECR */
+.endm
+
+/*--------------------------------------------------------------
+ * Restore all registers used by system call or Exceptions
+ * SP should always be pointing to the next free stack element
+ * when entering this macro.
+ *
+ * NOTE:
+ *
+ * It is recommended that lp_count/ilink1/ilink2 not be used as a dest reg
+ * for memory load operations. If used in that way interrupts are deffered
+ * by hardware and that is not good.
+ *-------------------------------------------------------------*/
+.macro EXCEPTION_EPILOGUE
+ POPAX erbta
+ POPAX lp_start
+ POPAX lp_end
+
+ POP r9
+ mov lp_count, r9 ;LD to lp_count is not allowed
+
+ POPAX erstatus
+ POPAX eret
+ POP blink
+ POP fp
+ POP gp
+ RESTORE_R12_TO_R0
+
+ ld sp, [sp] /* restore original sp */
+ /* orig_r0, ECR, user_r25 skipped automatically */
+.endm
+
+/* Dummy ECR values for Interrupts */
+#define event_IRQ1 0x0031abcd
+#define event_IRQ2 0x0032abcd
+
+.macro INTERRUPT_PROLOGUE LVL
+
+ /* free up r9 as scratchpad */
+ PROLOG_FREEUP_REG r9, @int\LVL\()_saved_reg
+
+ /* Which mode (user/kernel) was the system in when intr occured */
+ lr r9, [status32_l\LVL\()]
+
+ SWITCH_TO_KERNEL_STK
+
+#ifdef CONFIG_ARC_CURR_IN_REG
+ /* Treat r25 as scratch reg (save on stack) and load with "current" */
+ PUSH r25
+ GET_CURR_TASK_ON_CPU r25
+#else
+ sub sp, sp, 4
+#endif
+
+ PUSH 0x003\LVL\()abcd /* Dummy ECR */
+ sub sp, sp, 8 /* skip orig_r0 (not needed)
+ skip pt_regs->sp, already saved above */
+
+ /* Restore r9 used to code the early prologue */
+ PROLOG_RESTORE_REG r9, @int\LVL\()_saved_reg
+
+ SAVE_R0_TO_R12
+ PUSH gp
+ PUSH fp
+ PUSH blink
+ PUSH ilink\LVL\()
+ PUSHAX status32_l\LVL\()
+ PUSH lp_count
+ PUSHAX lp_end
+ PUSHAX lp_start
+ PUSHAX bta_l\LVL\()
+.endm
+
+/*--------------------------------------------------------------
+ * Restore all registers used by interrupt handlers.
+ *
+ * NOTE:
+ *
+ * It is recommended that lp_count/ilink1/ilink2 not be used as a dest reg
+ * for memory load operations. If used in that way interrupts are deffered
+ * by hardware and that is not good.
+ *-------------------------------------------------------------*/
+.macro INTERRUPT_EPILOGUE LVL
+ POPAX bta_l\LVL\()
+ POPAX lp_start
+ POPAX lp_end
+
+ POP r9
+ mov lp_count, r9 ;LD to lp_count is not allowed
+
+ POPAX status32_l\LVL\()
+ POP ilink\LVL\()
+ POP blink
+ POP fp
+ POP gp
+ RESTORE_R12_TO_R0
+
+ ld sp, [sp] /* restore original sp */
+ /* orig_r0, ECR, user_r25 skipped automatically */
+.endm
+
+/* Get thread_info of "current" tsk */
+.macro GET_CURR_THR_INFO_FROM_SP reg
+ bic \reg, sp, (THREAD_SIZE - 1)
+.endm
+
+/* Get CPU-ID of this core */
+.macro GET_CPU_ID reg
+ lr \reg, [identity]
+ lsr \reg, \reg, 8
+ bmsk \reg, \reg, 7
+.endm
+
+#endif /* __ASM_ARC_ENTRY_COMPACT_H */
diff --git a/arch/arc/include/asm/entry.h b/arch/arc/include/asm/entry.h
index 8840810..ad7860c 100644
--- a/arch/arc/include/asm/entry.h
+++ b/arch/arc/include/asm/entry.h
@@ -1,45 +1,27 @@
/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
- *
- * Vineetg: March 2009 (Supporting 2 levels of Interrupts)
- * Stack switching code can no longer reliably rely on the fact that
- * if we are NOT in user mode, stack is switched to kernel mode.
- * e.g. L2 IRQ interrupted a L1 ISR which had not yet completed
- * it's prologue including stack switching from user mode
- *
- * Vineetg: Aug 28th 2008: Bug #94984
- * -Zero Overhead Loop Context shd be cleared when entering IRQ/EXcp/Trap
- * Normally CPU does this automatically, however when doing FAKE rtie,
- * we also need to explicitly do this. The problem in macros
- * FAKE_RET_FROM_EXCPN and FAKE_RET_FROM_EXCPN_LOCK_IRQ was that this bit
- * was being "CLEARED" rather then "SET". Actually "SET" clears ZOL context
- *
- * Vineetg: May 5th 2008
- * -Modified CALLEE_REG save/restore macros to handle the fact that
- * r25 contains the kernel current task ptr
- * - Defined Stack Switching Macro to be reused in all intr/excp hdlrs
- * - Shaved off 11 instructions from RESTORE_ALL_INT1 by using the
- * address Write back load ld.ab instead of seperate ld/add instn
- *
- * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
*/
#ifndef __ASM_ARC_ENTRY_H
#define __ASM_ARC_ENTRY_H
-#ifdef __ASSEMBLY__
#include <asm/unistd.h> /* For NR_syscalls defination */
-#include <asm/asm-offsets.h>
#include <asm/arcregs.h>
#include <asm/ptrace.h>
#include <asm/processor.h> /* For VMALLOC_START */
-#include <asm/thread_info.h> /* For THREAD_SIZE */
#include <asm/mmu.h>
+#ifdef CONFIG_ISA_ARCOMPACT
+#include <asm/entry-compact.h> /* ISA specific bits */
+#else
+#include <asm/entry-arcv2.h>
+#endif
+
/* Note on the LD/ST addr modes with addr reg wback
*
* LD.a same as LD.aw
@@ -143,8 +125,6 @@
POP r13
.endm
-#define OFF_USER_R25_FROM_R24 (SZ_CALLEE_REGS + SZ_PT_REGS - 8)/4
-
/*--------------------------------------------------------------
* Collect User Mode callee regs as struct callee_regs - needed by
* fork/do_signal/unaligned-access-emulation.
@@ -157,12 +137,13 @@
*-------------------------------------------------------------*/
.macro SAVE_CALLEE_SAVED_USER
+ mov r12, sp ; save SP as ref to pt_regs
SAVE_R13_TO_R24
#ifdef CONFIG_ARC_CURR_IN_REG
- ; Retrieve orig r25 and save it on stack
- ld.as r12, [sp, OFF_USER_R25_FROM_R24]
- st.a r12, [sp, -4]
+ ; Retrieve orig r25 and save it with rest of callee_regs
+ ld.as r12, [r12, PT_user_r25]
+ PUSH r12
#else
PUSH r25
#endif
@@ -209,12 +190,16 @@
.macro RESTORE_CALLEE_SAVED_USER
#ifdef CONFIG_ARC_CURR_IN_REG
- ld.ab r12, [sp, 4]
- st.as r12, [sp, OFF_USER_R25_FROM_R24]
+ POP r12
#else
POP r25
#endif
RESTORE_R24_TO_R13
+
+ ; SP is back to start of pt_regs
+#ifdef CONFIG_ARC_CURR_IN_REG
+ st.as r12, [sp, PT_user_r25]
+#endif
.endm
/*--------------------------------------------------------------
@@ -240,117 +225,6 @@
.endm
-/*--------------------------------------------------------------
- * Switch to Kernel Mode stack if SP points to User Mode stack
- *
- * Entry : r9 contains pre-IRQ/exception/trap status32
- * Exit : SP is set to kernel mode stack pointer
- * If CURR_IN_REG, r25 set to "current" task pointer
- * Clobbers: r9
- *-------------------------------------------------------------*/
-
-.macro SWITCH_TO_KERNEL_STK
-
- /* User Mode when this happened ? Yes: Proceed to switch stack */
- bbit1 r9, STATUS_U_BIT, 88f
-
- /* OK we were already in kernel mode when this event happened, thus can
- * assume SP is kernel mode SP. _NO_ need to do any stack switching
- */
-
-#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
- /* However....
- * If Level 2 Interrupts enabled, we may end up with a corner case:
- * 1. User Task executing
- * 2. L1 IRQ taken, ISR starts (CPU auto-switched to KERNEL mode)
- * 3. But before it could switch SP from USER to KERNEL stack
- * a L2 IRQ "Interrupts" L1
- * Thay way although L2 IRQ happened in Kernel mode, stack is still
- * not switched.
- * To handle this, we may need to switch stack even if in kernel mode
- * provided SP has values in range of USER mode stack ( < 0x7000_0000 )
- */
- brlo sp, VMALLOC_START, 88f
-
- /* TODO: vineetg:
- * We need to be a bit more cautious here. What if a kernel bug in
- * L1 ISR, caused SP to go whaco (some small value which looks like
- * USER stk) and then we take L2 ISR.
- * Above brlo alone would treat it as a valid L1-L2 sceanrio
- * instead of shouting alound
- * The only feasible way is to make sure this L2 happened in
- * L1 prelogue ONLY i.e. ilink2 is less than a pre-set marker in
- * L1 ISR before it switches stack
- */
-
-#endif
-
- /* Save Pre Intr/Exception KERNEL MODE SP on kernel stack
- * safe-keeping not really needed, but it keeps the epilogue code
- * (SP restore) simpler/uniform.
- */
- b.d 66f
- mov r9, sp
-
-88: /*------Intr/Ecxp happened in user mode, "switch" stack ------ */
-
- GET_CURR_TASK_ON_CPU r9
-
- /* With current tsk in r9, get it's kernel mode stack base */
- GET_TSK_STACK_BASE r9, r9
-
-66:
-#ifdef CONFIG_ARC_CURR_IN_REG
- /*
- * Treat r25 as scratch reg, save it on stack first
- * Load it with current task pointer
- */
- st r25, [r9, -4]
- GET_CURR_TASK_ON_CPU r25
-#endif
-
- /* Save Pre Intr/Exception User SP on kernel stack */
- st.a sp, [r9, -16] ; Make room for orig_r0, ECR, user_r25
-
- /* CAUTION:
- * SP should be set at the very end when we are done with everything
- * In case of 2 levels of interrupt we depend on value of SP to assume
- * that everything else is done (loading r25 etc)
- */
-
- /* set SP to point to kernel mode stack */
- mov sp, r9
-
- /* ----- Stack Switched to kernel Mode, Now save REG FILE ----- */
-
-.endm
-
-/*------------------------------------------------------------
- * "FAKE" a rtie to return from CPU Exception context
- * This is to re-enable Exceptions within exception
- * Look at EV_ProtV to see how this is actually used
- *-------------------------------------------------------------*/
-
-.macro FAKE_RET_FROM_EXCPN reg
-
- ld \reg, [sp, PT_status32]
- bic \reg, \reg, (STATUS_U_MASK|STATUS_DE_MASK)
- bset \reg, \reg, STATUS_L_BIT
- sr \reg, [erstatus]
- mov \reg, 55f
- sr \reg, [eret]
-
- rtie
-55:
-.endm
-
-/*
- * @reg [OUT] &thread_info of "current"
- */
-.macro GET_CURR_THR_INFO_FROM_SP reg
- bic \reg, sp, (THREAD_SIZE - 1)
-.endm
-
/*
* @reg [OUT] thread_info->flags of "current"
*/
@@ -359,222 +233,6 @@
ld \reg, [\reg, THREAD_INFO_FLAGS]
.endm
-/*--------------------------------------------------------------
- * For early Exception Prologue, a core reg is temporarily needed to
- * code the rest of prolog (stack switching). This is done by stashing
- * it to memory (non-SMP case) or SCRATCH0 Aux Reg (SMP).
- *
- * Before saving the full regfile - this reg is restored back, only
- * to be saved again on kernel mode stack, as part of pt_regs.
- *-------------------------------------------------------------*/
-.macro EXCPN_PROLOG_FREEUP_REG reg
-#ifdef CONFIG_SMP
- sr \reg, [ARC_REG_SCRATCH_DATA0]
-#else
- st \reg, [@ex_saved_reg1]
-#endif
-.endm
-
-.macro EXCPN_PROLOG_RESTORE_REG reg
-#ifdef CONFIG_SMP
- lr \reg, [ARC_REG_SCRATCH_DATA0]
-#else
- ld \reg, [@ex_saved_reg1]
-#endif
-.endm
-
-/*--------------------------------------------------------------
- * Exception Entry prologue
- * -Switches stack to K mode (if not already)
- * -Saves the register file
- *
- * After this it is safe to call the "C" handlers
- *-------------------------------------------------------------*/
-.macro EXCEPTION_PROLOGUE
-
- /* Need at least 1 reg to code the early exception prologue */
- EXCPN_PROLOG_FREEUP_REG r9
-
- /* U/K mode at time of exception (stack not switched if already K) */
- lr r9, [erstatus]
-
- /* ARC700 doesn't provide auto-stack switching */
- SWITCH_TO_KERNEL_STK
-
- /* save the regfile */
- SAVE_ALL_SYS
-.endm
-
-/*--------------------------------------------------------------
- * Save all registers used by Exceptions (TLB Miss, Prot-V, Mem err etc)
- * Requires SP to be already switched to kernel mode Stack
- * sp points to the next free element on the stack at exit of this macro.
- * Registers are pushed / popped in the order defined in struct ptregs
- * in asm/ptrace.h
- * Note that syscalls are implemented via TRAP which is also a exception
- * from CPU's point of view
- *-------------------------------------------------------------*/
-.macro SAVE_ALL_SYS
-
- lr r9, [ecr]
- st r9, [sp, 8] /* ECR */
- st r0, [sp, 4] /* orig_r0, needed only for sys calls */
-
- /* Restore r9 used to code the early prologue */
- EXCPN_PROLOG_RESTORE_REG r9
-
- SAVE_R0_TO_R12
- PUSH gp
- PUSH fp
- PUSH blink
- PUSHAX eret
- PUSHAX erstatus
- PUSH lp_count
- PUSHAX lp_end
- PUSHAX lp_start
- PUSHAX erbta
-.endm
-
-/*--------------------------------------------------------------
- * Restore all registers used by system call or Exceptions
- * SP should always be pointing to the next free stack element
- * when entering this macro.
- *
- * NOTE:
- *
- * It is recommended that lp_count/ilink1/ilink2 not be used as a dest reg
- * for memory load operations. If used in that way interrupts are deffered
- * by hardware and that is not good.
- *-------------------------------------------------------------*/
-.macro RESTORE_ALL_SYS
- POPAX erbta
- POPAX lp_start
- POPAX lp_end
-
- POP r9
- mov lp_count, r9 ;LD to lp_count is not allowed
-
- POPAX erstatus
- POPAX eret
- POP blink
- POP fp
- POP gp
- RESTORE_R12_TO_R0
-
- ld sp, [sp] /* restore original sp */
- /* orig_r0, ECR, user_r25 skipped automatically */
-.endm
-
-
-/*--------------------------------------------------------------
- * Save all registers used by interrupt handlers.
- *-------------------------------------------------------------*/
-.macro SAVE_ALL_INT1
-
- /* restore original r9 to be saved as part of reg-file */
-#ifdef CONFIG_SMP
- lr r9, [ARC_REG_SCRATCH_DATA0]
-#else
- ld r9, [@int1_saved_reg]
-#endif
-
- /* now we are ready to save the remaining context :) */
- st event_IRQ1, [sp, 8] /* Dummy ECR */
- st 0, [sp, 4] /* orig_r0 , N/A for IRQ */
-
- SAVE_R0_TO_R12
- PUSH gp
- PUSH fp
- PUSH blink
- PUSH ilink1
- PUSHAX status32_l1
- PUSH lp_count
- PUSHAX lp_end
- PUSHAX lp_start
- PUSHAX bta_l1
-.endm
-
-.macro SAVE_ALL_INT2
-
- /* TODO-vineetg: SMP we can't use global nor can we use
- * SCRATCH0 as we do for int1 because while int1 is using
- * it, int2 can come
- */
- /* retsore original r9 , saved in sys_saved_r9 */
- ld r9, [@int2_saved_reg]
-
- /* now we are ready to save the remaining context :) */
- st event_IRQ2, [sp, 8] /* Dummy ECR */
- st 0, [sp, 4] /* orig_r0 , N/A for IRQ */
-
- SAVE_R0_TO_R12
- PUSH gp
- PUSH fp
- PUSH blink
- PUSH ilink2
- PUSHAX status32_l2
- PUSH lp_count
- PUSHAX lp_end
- PUSHAX lp_start
- PUSHAX bta_l2
-.endm
-
-/*--------------------------------------------------------------
- * Restore all registers used by interrupt handlers.
- *
- * NOTE:
- *
- * It is recommended that lp_count/ilink1/ilink2 not be used as a dest reg
- * for memory load operations. If used in that way interrupts are deffered
- * by hardware and that is not good.
- *-------------------------------------------------------------*/
-
-.macro RESTORE_ALL_INT1
- POPAX bta_l1
- POPAX lp_start
- POPAX lp_end
-
- POP r9
- mov lp_count, r9 ;LD to lp_count is not allowed
-
- POPAX status32_l1
- POP ilink1
- POP blink
- POP fp
- POP gp
- RESTORE_R12_TO_R0
-
- ld sp, [sp] /* restore original sp */
- /* orig_r0, ECR, user_r25 skipped automatically */
-.endm
-
-.macro RESTORE_ALL_INT2
- POPAX bta_l2
- POPAX lp_start
- POPAX lp_end
-
- POP r9
- mov lp_count, r9 ;LD to lp_count is not allowed
-
- POPAX status32_l2
- POP ilink2
- POP blink
- POP fp
- POP gp
- RESTORE_R12_TO_R0
-
- ld sp, [sp] /* restore original sp */
- /* orig_r0, ECR, user_r25 skipped automatically */
-.endm
-
-
-/* Get CPU-ID of this core */
-.macro GET_CPU_ID reg
- lr \reg, [identity]
- lsr \reg, \reg, 8
- bmsk \reg, \reg, 7
-.endm
-
#ifdef CONFIG_SMP
/*-------------------------------------------------
@@ -643,6 +301,4 @@
#endif /* CONFIG_ARC_CURR_IN_REG */
-#endif /* __ASSEMBLY__ */
-
#endif /* __ASM_ARC_ENTRY_H */
diff --git a/arch/arc/include/asm/io.h b/arch/arc/include/asm/io.h
index 7cc4ced..694ece8 100644
--- a/arch/arc/include/asm/io.h
+++ b/arch/arc/include/asm/io.h
@@ -99,9 +99,45 @@
}
-#define readb_relaxed readb
-#define readw_relaxed readw
-#define readl_relaxed readl
+#ifdef CONFIG_ISA_ARCV2
+#include <asm/barrier.h>
+#define __iormb() rmb()
+#define __iowmb() wmb()
+#else
+#define __iormb() do { } while (0)
+#define __iowmb() do { } while (0)
+#endif
+
+/*
+ * MMIO can also get buffered/optimized in micro-arch, so barriers needed
+ * Based on ARM model for the typical use case
+ *
+ * <ST [DMA buffer]>
+ * <writel MMIO "go" reg>
+ * or:
+ * <readl MMIO "status" reg>
+ * <LD [DMA buffer]>
+ *
+ * http://lkml.kernel.org/r/20150622133656.GG1583@arm.com
+ */
+#define readb(c) ({ u8 __v = readb_relaxed(c); __iormb(); __v; })
+#define readw(c) ({ u16 __v = readw_relaxed(c); __iormb(); __v; })
+#define readl(c) ({ u32 __v = readl_relaxed(c); __iormb(); __v; })
+
+#define writeb(v,c) ({ __iowmb(); writeb_relaxed(v,c); })
+#define writew(v,c) ({ __iowmb(); writew_relaxed(v,c); })
+#define writel(v,c) ({ __iowmb(); writel_relaxed(v,c); })
+
+/*
+ * Relaxed API for drivers which can handle any ordering themselves
+ */
+#define readb_relaxed(c) __raw_readb(c)
+#define readw_relaxed(c) __raw_readw(c)
+#define readl_relaxed(c) __raw_readl(c)
+
+#define writeb_relaxed(v,c) __raw_writeb(v,c)
+#define writew_relaxed(v,c) __raw_writew(v,c)
+#define writel_relaxed(v,c) __raw_writel(v,c)
#include <asm-generic/io.h>
diff --git a/arch/arc/include/asm/irq.h b/arch/arc/include/asm/irq.h
index f38652f..bc510363 100644
--- a/arch/arc/include/asm/irq.h
+++ b/arch/arc/include/asm/irq.h
@@ -13,8 +13,14 @@
#define NR_IRQS 128 /* allow some CPU external IRQ handling */
/* Platform Independent IRQs */
+#ifdef CONFIG_ISA_ARCOMPACT
#define TIMER0_IRQ 3
#define TIMER1_IRQ 4
+#else
+#define TIMER0_IRQ 16
+#define TIMER1_IRQ 17
+#define IPI_IRQ 19
+#endif
#include <linux/interrupt.h>
#include <asm-generic/irq.h>
diff --git a/arch/arc/include/asm/irqflags-arcv2.h b/arch/arc/include/asm/irqflags-arcv2.h
new file mode 100644
index 0000000..ad481c2
--- /dev/null
+++ b/arch/arc/include/asm/irqflags-arcv2.h
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_IRQFLAGS_ARCV2_H
+#define __ASM_IRQFLAGS_ARCV2_H
+
+#include <asm/arcregs.h>
+
+/* status32 Bits */
+#define STATUS_AD_BIT 19 /* Disable Align chk: core supports non-aligned */
+#define STATUS_IE_BIT 31
+
+#define STATUS_AD_MASK (1<<STATUS_AD_BIT)
+#define STATUS_IE_MASK (1<<STATUS_IE_BIT)
+
+#define AUX_USER_SP 0x00D
+#define AUX_IRQ_CTRL 0x00E
+#define AUX_IRQ_ACT 0x043 /* Active Intr across all levels */
+#define AUX_IRQ_LVL_PEND 0x200 /* Pending Intr across all levels */
+#define AUX_IRQ_PRIORITY 0x206
+#define ICAUSE 0x40a
+#define AUX_IRQ_SELECT 0x40b
+#define AUX_IRQ_ENABLE 0x40c
+
+/* Was Intr taken in User Mode */
+#define AUX_IRQ_ACT_BIT_U 31
+
+/* 0 is highest level, but taken by FIRQs, if present in design */
+#define ARCV2_IRQ_DEF_PRIO 0
+
+/* seed value for status register */
+#define ISA_INIT_STATUS_BITS (STATUS_IE_MASK | STATUS_AD_MASK | \
+ (ARCV2_IRQ_DEF_PRIO << 1))
+
+#ifndef __ASSEMBLY__
+
+/*
+ * Save IRQ state and disable IRQs
+ */
+static inline long arch_local_irq_save(void)
+{
+ unsigned long flags;
+
+ __asm__ __volatile__(" clri %0 \n" : "=r" (flags) : : "memory");
+
+ return flags;
+}
+
+/*
+ * restore saved IRQ state
+ */
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+ __asm__ __volatile__(" seti %0 \n" : : "r" (flags) : "memory");
+}
+
+/*
+ * Unconditionally Enable IRQs
+ */
+static inline void arch_local_irq_enable(void)
+{
+ unsigned int irqact = read_aux_reg(AUX_IRQ_ACT);
+
+ if (irqact & 0xffff)
+ write_aux_reg(AUX_IRQ_ACT, irqact & ~0xffff);
+
+ __asm__ __volatile__(" seti \n" : : : "memory");
+}
+
+/*
+ * Unconditionally Disable IRQs
+ */
+static inline void arch_local_irq_disable(void)
+{
+ __asm__ __volatile__(" clri \n" : : : "memory");
+}
+
+/*
+ * save IRQ state
+ */
+static inline long arch_local_save_flags(void)
+{
+ unsigned long temp;
+
+ __asm__ __volatile__(
+ " lr %0, [status32] \n"
+ : "=&r"(temp)
+ :
+ : "memory");
+
+ return temp;
+}
+
+/*
+ * Query IRQ state
+ */
+static inline int arch_irqs_disabled_flags(unsigned long flags)
+{
+ return !(flags & (STATUS_IE_MASK));
+}
+
+static inline int arch_irqs_disabled(void)
+{
+ return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
+#else
+
+.macro IRQ_DISABLE scratch
+ clri
+.endm
+
+.macro IRQ_ENABLE scratch
+ seti
+.endm
+
+#endif /* __ASSEMBLY__ */
+
+#endif
diff --git a/arch/arc/include/asm/irqflags-compact.h b/arch/arc/include/asm/irqflags-compact.h
new file mode 100644
index 0000000..aa80557
--- /dev/null
+++ b/arch/arc/include/asm/irqflags-compact.h
@@ -0,0 +1,183 @@
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_IRQFLAGS_ARCOMPACT_H
+#define __ASM_IRQFLAGS_ARCOMPACT_H
+
+/* vineetg: March 2010 : local_irq_save( ) optimisation
+ * -Remove explicit mov of current status32 into reg, that is not needed
+ * -Use BIC insn instead of INVERTED + AND
+ * -Conditionally disable interrupts (if they are not enabled, don't disable)
+*/
+
+#include <asm/arcregs.h>
+
+/* status32 Reg bits related to Interrupt Handling */
+#define STATUS_E1_BIT 1 /* Int 1 enable */
+#define STATUS_E2_BIT 2 /* Int 2 enable */
+#define STATUS_A1_BIT 3 /* Int 1 active */
+#define STATUS_A2_BIT 4 /* Int 2 active */
+
+#define STATUS_E1_MASK (1<<STATUS_E1_BIT)
+#define STATUS_E2_MASK (1<<STATUS_E2_BIT)
+#define STATUS_A1_MASK (1<<STATUS_A1_BIT)
+#define STATUS_A2_MASK (1<<STATUS_A2_BIT)
+#define STATUS_IE_MASK (STATUS_E1_MASK | STATUS_E2_MASK)
+
+/* Other Interrupt Handling related Aux regs */
+#define AUX_IRQ_LEV 0x200 /* IRQ Priority: L1 or L2 */
+#define AUX_IRQ_HINT 0x201 /* For generating Soft Interrupts */
+#define AUX_IRQ_LV12 0x43 /* interrupt level register */
+
+#define AUX_IENABLE 0x40c
+#define AUX_ITRIGGER 0x40d
+#define AUX_IPULSE 0x415
+
+#define ISA_INIT_STATUS_BITS STATUS_IE_MASK
+
+#ifndef __ASSEMBLY__
+
+/******************************************************************
+ * IRQ Control Macros
+ *
+ * All of them have "memory" clobber (compiler barrier) which is needed to
+ * ensure that LD/ST requiring irq safetly (R-M-W when LLSC is not available)
+ * are redone after IRQs are re-enabled (and gcc doesn't reuse stale register)
+ *
+ * Noted at the time of Abilis Timer List corruption
+ * Orig Bug + Rejected solution : https://lkml.org/lkml/2013/3/29/67
+ * Reasoning : https://lkml.org/lkml/2013/4/8/15
+ *
+ ******************************************************************/
+
+/*
+ * Save IRQ state and disable IRQs
+ */
+static inline long arch_local_irq_save(void)
+{
+ unsigned long temp, flags;
+
+ __asm__ __volatile__(
+ " lr %1, [status32] \n"
+ " bic %0, %1, %2 \n"
+ " and.f 0, %1, %2 \n"
+ " flag.nz %0 \n"
+ : "=r"(temp), "=r"(flags)
+ : "n"((STATUS_E1_MASK | STATUS_E2_MASK))
+ : "memory", "cc");
+
+ return flags;
+}
+
+/*
+ * restore saved IRQ state
+ */
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+
+ __asm__ __volatile__(
+ " flag %0 \n"
+ :
+ : "r"(flags)
+ : "memory");
+}
+
+/*
+ * Unconditionally Enable IRQs
+ */
+extern void arch_local_irq_enable(void);
+
+/*
+ * Unconditionally Disable IRQs
+ */
+static inline void arch_local_irq_disable(void)
+{
+ unsigned long temp;
+
+ __asm__ __volatile__(
+ " lr %0, [status32] \n"
+ " and %0, %0, %1 \n"
+ " flag %0 \n"
+ : "=&r"(temp)
+ : "n"(~(STATUS_E1_MASK | STATUS_E2_MASK))
+ : "memory");
+}
+
+/*
+ * save IRQ state
+ */
+static inline long arch_local_save_flags(void)
+{
+ unsigned long temp;
+
+ __asm__ __volatile__(
+ " lr %0, [status32] \n"
+ : "=&r"(temp)
+ :
+ : "memory");
+
+ return temp;
+}
+
+/*
+ * Query IRQ state
+ */
+static inline int arch_irqs_disabled_flags(unsigned long flags)
+{
+ return !(flags & (STATUS_E1_MASK
+#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
+ | STATUS_E2_MASK
+#endif
+ ));
+}
+
+static inline int arch_irqs_disabled(void)
+{
+ return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
+#else
+
+#ifdef CONFIG_TRACE_IRQFLAGS
+
+.macro TRACE_ASM_IRQ_DISABLE
+ bl trace_hardirqs_off
+.endm
+
+.macro TRACE_ASM_IRQ_ENABLE
+ bl trace_hardirqs_on
+.endm
+
+#else
+
+.macro TRACE_ASM_IRQ_DISABLE
+.endm
+
+.macro TRACE_ASM_IRQ_ENABLE
+.endm
+
+#endif
+
+.macro IRQ_DISABLE scratch
+ lr \scratch, [status32]
+ bic \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
+ flag \scratch
+ TRACE_ASM_IRQ_DISABLE
+.endm
+
+.macro IRQ_ENABLE scratch
+ lr \scratch, [status32]
+ or \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
+ flag \scratch
+ TRACE_ASM_IRQ_ENABLE
+.endm
+
+#endif /* __ASSEMBLY__ */
+
+#endif
diff --git a/arch/arc/include/asm/irqflags.h b/arch/arc/include/asm/irqflags.h
index 27ecc69..59bc6a6 100644
--- a/arch/arc/include/asm/irqflags.h
+++ b/arch/arc/include/asm/irqflags.h
@@ -1,4 +1,5 @@
/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
@@ -9,171 +10,10 @@
#ifndef __ASM_ARC_IRQFLAGS_H
#define __ASM_ARC_IRQFLAGS_H
-/* vineetg: March 2010 : local_irq_save( ) optimisation
- * -Remove explicit mov of current status32 into reg, that is not needed
- * -Use BIC insn instead of INVERTED + AND
- * -Conditionally disable interrupts (if they are not enabled, don't disable)
-*/
-
-#include <asm/arcregs.h>
-
-/* status32 Reg bits related to Interrupt Handling */
-#define STATUS_E1_BIT 1 /* Int 1 enable */
-#define STATUS_E2_BIT 2 /* Int 2 enable */
-#define STATUS_A1_BIT 3 /* Int 1 active */
-#define STATUS_A2_BIT 4 /* Int 2 active */
-
-#define STATUS_E1_MASK (1<<STATUS_E1_BIT)
-#define STATUS_E2_MASK (1<<STATUS_E2_BIT)
-#define STATUS_A1_MASK (1<<STATUS_A1_BIT)
-#define STATUS_A2_MASK (1<<STATUS_A2_BIT)
-
-/* Other Interrupt Handling related Aux regs */
-#define AUX_IRQ_LEV 0x200 /* IRQ Priority: L1 or L2 */
-#define AUX_IRQ_HINT 0x201 /* For generating Soft Interrupts */
-#define AUX_IRQ_LV12 0x43 /* interrupt level register */
-
-#define AUX_IENABLE 0x40c
-#define AUX_ITRIGGER 0x40d
-#define AUX_IPULSE 0x415
-
-#ifndef __ASSEMBLY__
-
-/******************************************************************
- * IRQ Control Macros
- *
- * All of them have "memory" clobber (compiler barrier) which is needed to
- * ensure that LD/ST requiring irq safetly (R-M-W when LLSC is not available)
- * are redone after IRQs are re-enabled (and gcc doesn't reuse stale register)
- *
- * Noted at the time of Abilis Timer List corruption
- * Orig Bug + Rejected solution : https://lkml.org/lkml/2013/3/29/67
- * Reasoning : https://lkml.org/lkml/2013/4/8/15
- *
- ******************************************************************/
-
-/*
- * Save IRQ state and disable IRQs
- */
-static inline long arch_local_irq_save(void)
-{
- unsigned long temp, flags;
-
- __asm__ __volatile__(
- " lr %1, [status32] \n"
- " bic %0, %1, %2 \n"
- " and.f 0, %1, %2 \n"
- " flag.nz %0 \n"
- : "=r"(temp), "=r"(flags)
- : "n"((STATUS_E1_MASK | STATUS_E2_MASK))
- : "memory", "cc");
-
- return flags;
-}
-
-/*
- * restore saved IRQ state
- */
-static inline void arch_local_irq_restore(unsigned long flags)
-{
-
- __asm__ __volatile__(
- " flag %0 \n"
- :
- : "r"(flags)
- : "memory");
-}
-
-/*
- * Unconditionally Enable IRQs
- */
-extern void arch_local_irq_enable(void);
-
-/*
- * Unconditionally Disable IRQs
- */
-static inline void arch_local_irq_disable(void)
-{
- unsigned long temp;
-
- __asm__ __volatile__(
- " lr %0, [status32] \n"
- " and %0, %0, %1 \n"
- " flag %0 \n"
- : "=&r"(temp)
- : "n"(~(STATUS_E1_MASK | STATUS_E2_MASK))
- : "memory");
-}
-
-/*
- * save IRQ state
- */
-static inline long arch_local_save_flags(void)
-{
- unsigned long temp;
-
- __asm__ __volatile__(
- " lr %0, [status32] \n"
- : "=&r"(temp)
- :
- : "memory");
-
- return temp;
-}
-
-/*
- * Query IRQ state
- */
-static inline int arch_irqs_disabled_flags(unsigned long flags)
-{
- return !(flags & (STATUS_E1_MASK
-#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
- | STATUS_E2_MASK
-#endif
- ));
-}
-
-static inline int arch_irqs_disabled(void)
-{
- return arch_irqs_disabled_flags(arch_local_save_flags());
-}
-
+#ifdef CONFIG_ISA_ARCOMPACT
+#include <asm/irqflags-compact.h>
#else
-
-#ifdef CONFIG_TRACE_IRQFLAGS
-
-.macro TRACE_ASM_IRQ_DISABLE
- bl trace_hardirqs_off
-.endm
-
-.macro TRACE_ASM_IRQ_ENABLE
- bl trace_hardirqs_on
-.endm
-
-#else
-
-.macro TRACE_ASM_IRQ_DISABLE
-.endm
-
-.macro TRACE_ASM_IRQ_ENABLE
-.endm
-
+#include <asm/irqflags-arcv2.h>
#endif
-.macro IRQ_DISABLE scratch
- lr \scratch, [status32]
- bic \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
- flag \scratch
- TRACE_ASM_IRQ_DISABLE
-.endm
-
-.macro IRQ_ENABLE scratch
- lr \scratch, [status32]
- or \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
- flag \scratch
- TRACE_ASM_IRQ_ENABLE
-.endm
-
-#endif /* __ASSEMBLY__ */
-
#endif
diff --git a/arch/arc/include/asm/mcip.h b/arch/arc/include/asm/mcip.h
new file mode 100644
index 0000000..52c11f0
--- /dev/null
+++ b/arch/arc/include/asm/mcip.h
@@ -0,0 +1,94 @@
+/*
+ * ARConnect IP Support (Multi core enabler: Cross core IPI, RTC ...)
+ *
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_MCIP_H
+#define __ASM_MCIP_H
+
+#ifdef CONFIG_ISA_ARCV2
+
+#include <asm/arcregs.h>
+
+#define ARC_REG_MCIP_BCR 0x0d0
+#define ARC_REG_MCIP_CMD 0x600
+#define ARC_REG_MCIP_WDATA 0x601
+#define ARC_REG_MCIP_READBACK 0x602
+
+struct mcip_cmd {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad:8, param:16, cmd:8;
+#else
+ unsigned int cmd:8, param:16, pad:8;
+#endif
+
+#define CMD_INTRPT_GENERATE_IRQ 0x01
+#define CMD_INTRPT_GENERATE_ACK 0x02
+#define CMD_INTRPT_READ_STATUS 0x03
+#define CMD_INTRPT_CHECK_SOURCE 0x04
+
+/* Semaphore Commands */
+#define CMD_SEMA_CLAIM_AND_READ 0x11
+#define CMD_SEMA_RELEASE 0x12
+
+#define CMD_DEBUG_SET_MASK 0x34
+#define CMD_DEBUG_SET_SELECT 0x36
+
+#define CMD_GRTC_READ_LO 0x42
+#define CMD_GRTC_READ_HI 0x43
+
+#define CMD_IDU_ENABLE 0x71
+#define CMD_IDU_DISABLE 0x72
+#define CMD_IDU_SET_MODE 0x74
+#define CMD_IDU_SET_DEST 0x76
+#define CMD_IDU_SET_MASK 0x7C
+
+#define IDU_M_TRIG_LEVEL 0x0
+#define IDU_M_TRIG_EDGE 0x1
+
+#define IDU_M_DISTRI_RR 0x0
+#define IDU_M_DISTRI_DEST 0x2
+};
+
+/*
+ * MCIP programming model
+ *
+ * - Simple commands write {cmd:8,param:16} to MCIP_CMD aux reg
+ * (param could be irq, common_irq, core_id ...)
+ * - More involved commands setup MCIP_WDATA with cmd specific data
+ * before invoking the simple command
+ */
+static inline void __mcip_cmd(unsigned int cmd, unsigned int param)
+{
+ struct mcip_cmd buf;
+
+ buf.pad = 0;
+ buf.cmd = cmd;
+ buf.param = param;
+
+ WRITE_AUX(ARC_REG_MCIP_CMD, buf);
+}
+
+/*
+ * Setup additional data for a cmd
+ * Callers need to lock to ensure atomicity
+ */
+static inline void __mcip_cmd_data(unsigned int cmd, unsigned int param,
+ unsigned int data)
+{
+ write_aux_reg(ARC_REG_MCIP_WDATA, data);
+
+ __mcip_cmd(cmd, param);
+}
+
+extern void mcip_init_early_smp(void);
+extern void mcip_init_smp(unsigned int cpu);
+
+#endif
+
+#endif
diff --git a/arch/arc/include/asm/mmu.h b/arch/arc/include/asm/mmu.h
index 8c84ae9..0f9c3eb 100644
--- a/arch/arc/include/asm/mmu.h
+++ b/arch/arc/include/asm/mmu.h
@@ -15,24 +15,41 @@
#define CONFIG_ARC_MMU_VER 2
#elif defined(CONFIG_ARC_MMU_V3)
#define CONFIG_ARC_MMU_VER 3
+#elif defined(CONFIG_ARC_MMU_V4)
+#define CONFIG_ARC_MMU_VER 4
#endif
/* MMU Management regs */
#define ARC_REG_MMU_BCR 0x06f
+#if (CONFIG_ARC_MMU_VER < 4)
#define ARC_REG_TLBPD0 0x405
#define ARC_REG_TLBPD1 0x406
#define ARC_REG_TLBINDEX 0x407
#define ARC_REG_TLBCOMMAND 0x408
#define ARC_REG_PID 0x409
#define ARC_REG_SCRATCH_DATA0 0x418
+#else
+#define ARC_REG_TLBPD0 0x460
+#define ARC_REG_TLBPD1 0x461
+#define ARC_REG_TLBINDEX 0x464
+#define ARC_REG_TLBCOMMAND 0x465
+#define ARC_REG_PID 0x468
+#define ARC_REG_SCRATCH_DATA0 0x46c
+#endif
/* Bits in MMU PID register */
-#define MMU_ENABLE (1 << 31) /* Enable MMU for process */
+#define __TLB_ENABLE (1 << 31)
+#define __PROG_ENABLE (1 << 30)
+#define MMU_ENABLE (__TLB_ENABLE | __PROG_ENABLE)
/* Error code if probe fails */
#define TLB_LKUP_ERR 0x80000000
+#if (CONFIG_ARC_MMU_VER < 4)
#define TLB_DUP_ERR (TLB_LKUP_ERR | 0x00000001)
+#else
+#define TLB_DUP_ERR (TLB_LKUP_ERR | 0x40000000)
+#endif
/* TLB Commands */
#define TLBWrite 0x1
@@ -45,6 +62,11 @@
#define TLBIVUTLB 0x6 /* explicitly inv uTLBs */
#endif
+#if (CONFIG_ARC_MMU_VER >= 4)
+#define TLBInsertEntry 0x7
+#define TLBDeleteEntry 0x8
+#endif
+
#ifndef __ASSEMBLY__
typedef struct {
diff --git a/arch/arc/include/asm/pgtable.h b/arch/arc/include/asm/pgtable.h
index 9615fe1..1281718 100644
--- a/arch/arc/include/asm/pgtable.h
+++ b/arch/arc/include/asm/pgtable.h
@@ -72,8 +72,18 @@
#define _PAGE_READ (1<<3) /* Page has user read perm (H) */
#define _PAGE_ACCESSED (1<<4) /* Page is accessed (S) */
#define _PAGE_MODIFIED (1<<5) /* Page modified (dirty) (S) */
+
+#if (CONFIG_ARC_MMU_VER >= 4)
+#define _PAGE_WTHRU (1<<7) /* Page cache mode write-thru (H) */
+#endif
+
#define _PAGE_GLOBAL (1<<8) /* Page is global (H) */
#define _PAGE_PRESENT (1<<9) /* TLB entry is valid (H) */
+
+#if (CONFIG_ARC_MMU_VER >= 4)
+#define _PAGE_SZ (1<<10) /* Page Size indicator (H) */
+#endif
+
#define _PAGE_SHARED_CODE (1<<11) /* Shared Code page with cmn vaddr
usable for shared TLB entries (H) */
#endif
diff --git a/arch/arc/include/asm/processor.h b/arch/arc/include/asm/processor.h
index 52312cb..ee682d8 100644
--- a/arch/arc/include/asm/processor.h
+++ b/arch/arc/include/asm/processor.h
@@ -77,7 +77,7 @@
*/
#define TSK_K_ESP(tsk) (tsk->thread.ksp)
-#define TSK_K_REG(tsk, off) (*((unsigned int *)(TSK_K_ESP(tsk) + \
+#define TSK_K_REG(tsk, off) (*((unsigned long *)(TSK_K_ESP(tsk) + \
sizeof(struct callee_regs) + off)))
#define TSK_K_BLINK(tsk) TSK_K_REG(tsk, 4)
@@ -100,29 +100,26 @@
#endif /* !__ASSEMBLY__ */
-/* Kernels Virtual memory area.
- * Unlike other architectures(MIPS, sh, cris ) ARC 700 does not have a
- * "kernel translated" region (like KSEG2 in MIPS). So we use a upper part
- * of the translated bottom 2GB for kernel virtual memory and protect
- * these pages from user accesses by disabling Ru, Eu and Wu.
+/*
+ * System Memory Map on ARC
+ *
+ * ---------------------------- (lower 2G, Translated) -------------------------
+ * 0x0000_0000 0x5FFF_FFFF (user vaddr: TASK_SIZE)
+ * 0x6000_0000 0x6FFF_FFFF (reserved gutter between U/K)
+ * 0x7000_0000 0x7FFF_FFFF (kvaddr: vmalloc/modules/pkmap..)
+ *
+ * PAGE_OFFSET ---------------- (Upper 2G, Untranslated) -----------------------
+ * 0x8000_0000 0xBFFF_FFFF (kernel direct mapped)
+ * 0xC000_0000 0xFFFF_FFFF (peripheral uncached space)
+ * -----------------------------------------------------------------------------
*/
-#define VMALLOC_SIZE (0x10000000) /* 256M */
-#define VMALLOC_START (PAGE_OFFSET - VMALLOC_SIZE)
-#define VMALLOC_END (PAGE_OFFSET)
+#define VMALLOC_START 0x70000000
+#define VMALLOC_SIZE (PAGE_OFFSET - VMALLOC_START)
+#define VMALLOC_END (VMALLOC_START + VMALLOC_SIZE)
-/* Most of the architectures seem to be keeping some kind of padding between
- * userspace TASK_SIZE and PAGE_OFFSET. i.e TASK_SIZE != PAGE_OFFSET.
- */
#define USER_KERNEL_GUTTER 0x10000000
-/* User address space:
- * On ARC700, CPU allows the entire lower half of 32 bit address space to be
- * translated. Thus potentially 2G (0:0x7FFF_FFFF) could be User vaddr space.
- * However we steal 256M for kernel addr (0x7000_0000:0x7FFF_FFFF) and another
- * 256M (0x6000_0000:0x6FFF_FFFF) is gutter between user/kernel spaces
- * Thus total User vaddr space is (0:0x5FFF_FFFF)
- */
-#define TASK_SIZE (PAGE_OFFSET - VMALLOC_SIZE - USER_KERNEL_GUTTER)
+#define TASK_SIZE (VMALLOC_START - USER_KERNEL_GUTTER)
#define STACK_TOP TASK_SIZE
#define STACK_TOP_MAX STACK_TOP
diff --git a/arch/arc/include/asm/ptrace.h b/arch/arc/include/asm/ptrace.h
index 1bfeec2..9175597 100644
--- a/arch/arc/include/asm/ptrace.h
+++ b/arch/arc/include/asm/ptrace.h
@@ -16,6 +16,7 @@
/* THE pt_regs: Defines how regs are saved during entry into kernel */
+#ifdef CONFIG_ISA_ARCOMPACT
struct pt_regs {
/* Real registers */
@@ -56,6 +57,48 @@
long user_r25;
};
+#else
+
+struct pt_regs {
+
+ long orig_r0;
+
+ union {
+ struct {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned long state:8, ecr_vec:8,
+ ecr_cause:8, ecr_param:8;
+#else
+ unsigned long ecr_param:8, ecr_cause:8,
+ ecr_vec:8, state:8;
+#endif
+ };
+ unsigned long event;
+ };
+
+ long bta; /* bta_l1, bta_l2, erbta */
+
+ long user_r25;
+
+ long r26; /* gp */
+ long fp;
+ long sp; /* user/kernel sp depending on where we came from */
+
+ long r12;
+
+ /*------- Below list auto saved by h/w -----------*/
+ long r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11;
+
+ long blink;
+ long lp_end, lp_start, lp_count;
+
+ long ei, ldi, jli;
+
+ long ret;
+ long status32;
+};
+
+#endif
/* Callee saved registers - need to be saved only when you are scheduled out */
diff --git a/arch/arc/include/asm/spinlock.h b/arch/arc/include/asm/spinlock.h
index b6a8c2d..e1651df 100644
--- a/arch/arc/include/asm/spinlock.h
+++ b/arch/arc/include/asm/spinlock.h
@@ -22,24 +22,46 @@
{
unsigned int tmp = __ARCH_SPIN_LOCK_LOCKED__;
+ /*
+ * This smp_mb() is technically superfluous, we only need the one
+ * after the lock for providing the ACQUIRE semantics.
+ * However doing the "right" thing was regressing hackbench
+ * so keeping this, pending further investigation
+ */
+ smp_mb();
+
__asm__ __volatile__(
"1: ex %0, [%1] \n"
" breq %0, %2, 1b \n"
: "+&r" (tmp)
: "r"(&(lock->slock)), "ir"(__ARCH_SPIN_LOCK_LOCKED__)
: "memory");
+
+ /*
+ * ACQUIRE barrier to ensure load/store after taking the lock
+ * don't "bleed-up" out of the critical section (leak-in is allowed)
+ * http://www.spinics.net/lists/kernel/msg2010409.html
+ *
+ * ARCv2 only has load-load, store-store and all-all barrier
+ * thus need the full all-all barrier
+ */
+ smp_mb();
}
static inline int arch_spin_trylock(arch_spinlock_t *lock)
{
unsigned int tmp = __ARCH_SPIN_LOCK_LOCKED__;
+ smp_mb();
+
__asm__ __volatile__(
"1: ex %0, [%1] \n"
: "+r" (tmp)
: "r"(&(lock->slock))
: "memory");
+ smp_mb();
+
return (tmp == __ARCH_SPIN_LOCK_UNLOCKED__);
}
@@ -47,12 +69,22 @@
{
unsigned int tmp = __ARCH_SPIN_LOCK_UNLOCKED__;
+ /*
+ * RELEASE barrier: given the instructions avail on ARCv2, full barrier
+ * is the only option
+ */
+ smp_mb();
+
__asm__ __volatile__(
" ex %0, [%1] \n"
: "+r" (tmp)
: "r"(&(lock->slock))
: "memory");
+ /*
+ * superfluous, but keeping for now - see pairing version in
+ * arch_spin_lock above
+ */
smp_mb();
}
diff --git a/arch/arc/include/asm/thread_info.h b/arch/arc/include/asm/thread_info.h
index aca0d5a..3af6745 100644
--- a/arch/arc/include/asm/thread_info.h
+++ b/arch/arc/include/asm/thread_info.h
@@ -25,6 +25,7 @@
#endif
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
+#define THREAD_SHIFT (PAGE_SHIFT << THREAD_SIZE_ORDER)
#ifndef __ASSEMBLY__
diff --git a/arch/arc/include/asm/uaccess.h b/arch/arc/include/asm/uaccess.h
index 30c9baf..d1da603 100644
--- a/arch/arc/include/asm/uaccess.h
+++ b/arch/arc/include/asm/uaccess.h
@@ -659,31 +659,30 @@
static inline long
__arc_strncpy_from_user(char *dst, const char __user *src, long count)
{
- long res = count;
+ long res = 0;
char val;
- unsigned int hw_count;
if (count == 0)
return 0;
__asm__ __volatile__(
- " lp 2f \n"
+ " lp 3f \n"
"1: ldb.ab %3, [%2, 1] \n"
- " breq.d %3, 0, 2f \n"
+ " breq.d %3, 0, 3f \n"
" stb.ab %3, [%1, 1] \n"
- "2: sub %0, %6, %4 \n"
- "3: ;nop \n"
+ " add %0, %0, 1 # Num of NON NULL bytes copied \n"
+ "3: \n"
" .section .fixup, \"ax\" \n"
" .align 4 \n"
- "4: mov %0, %5 \n"
+ "4: mov %0, %4 # sets @res as -EFAULT \n"
" j 3b \n"
" .previous \n"
" .section __ex_table, \"a\" \n"
" .align 4 \n"
" .word 1b, 4b \n"
" .previous \n"
- : "=r"(res), "+r"(dst), "+r"(src), "=&r"(val), "=l"(hw_count)
- : "g"(-EFAULT), "ir"(count), "4"(count) /* this "4" seeds lp_count */
+ : "+r"(res), "+r"(dst), "+r"(src), "=r"(val)
+ : "g"(-EFAULT), "l"(count)
: "memory");
return res;
diff --git a/arch/arc/include/uapi/asm/page.h b/arch/arc/include/uapi/asm/page.h
index e5d41e0..9d129a2 100644
--- a/arch/arc/include/uapi/asm/page.h
+++ b/arch/arc/include/uapi/asm/page.h
@@ -30,7 +30,7 @@
#define PAGE_OFFSET (0x80000000)
#else
#define PAGE_SIZE (1UL << PAGE_SHIFT) /* Default 8K */
-#define PAGE_OFFSET (0x80000000UL) /* Kernel starts at 2G onwards */
+#define PAGE_OFFSET (0x80000000UL) /* Kernel starts at 2G onwards */
#endif
#define PAGE_MASK (~(PAGE_SIZE-1))
diff --git a/arch/arc/kernel/Makefile b/arch/arc/kernel/Makefile
index 113f203..e7f3625 100644
--- a/arch/arc/kernel/Makefile
+++ b/arch/arc/kernel/Makefile
@@ -8,12 +8,14 @@
# Pass UTS_MACHINE for user_regset definition
CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"'
-obj-y := arcksyms.o setup.o irq.o time.o reset.o ptrace.o entry.o process.o
+obj-y := arcksyms.o setup.o irq.o time.o reset.o ptrace.o process.o devtree.o
obj-y += signal.o traps.o sys.o troubleshoot.o stacktrace.o disasm.o clk.o
-obj-y += devtree.o
+obj-$(CONFIG_ISA_ARCOMPACT) += entry-compact.o intc-compact.o
+obj-$(CONFIG_ISA_ARCV2) += entry-arcv2.o intc-arcv2.o
obj-$(CONFIG_MODULES) += arcksyms.o module.o
obj-$(CONFIG_SMP) += smp.o
+obj-$(CONFIG_ARC_MCIP) += mcip.o
obj-$(CONFIG_ARC_DW2_UNWIND) += unwind.o
obj-$(CONFIG_KPROBES) += kprobes.o
obj-$(CONFIG_ARC_EMUL_UNALIGNED) += unaligned.o
diff --git a/arch/arc/kernel/asm-offsets.c b/arch/arc/kernel/asm-offsets.c
index 6c3aa0e..ecaf34e 100644
--- a/arch/arc/kernel/asm-offsets.c
+++ b/arch/arc/kernel/asm-offsets.c
@@ -37,6 +37,8 @@
DEFINE(TASK_ACT_MM, offsetof(struct task_struct, active_mm));
DEFINE(TASK_TGID, offsetof(struct task_struct, tgid));
+ DEFINE(TASK_PID, offsetof(struct task_struct, pid));
+ DEFINE(TASK_COMM, offsetof(struct task_struct, comm));
DEFINE(MM_CTXT, offsetof(struct mm_struct, context));
DEFINE(MM_PGD, offsetof(struct mm_struct, pgd));
@@ -56,8 +58,11 @@
DEFINE(PT_r5, offsetof(struct pt_regs, r5));
DEFINE(PT_r6, offsetof(struct pt_regs, r6));
DEFINE(PT_r7, offsetof(struct pt_regs, r7));
+ DEFINE(PT_ret, offsetof(struct pt_regs, ret));
DEFINE(SZ_CALLEE_REGS, sizeof(struct callee_regs));
DEFINE(SZ_PT_REGS, sizeof(struct pt_regs));
+ DEFINE(PT_user_r25, offsetof(struct pt_regs, user_r25));
+
return 0;
}
diff --git a/arch/arc/kernel/devtree.c b/arch/arc/kernel/devtree.c
index e32b54a..7e844fd 100644
--- a/arch/arc/kernel/devtree.c
+++ b/arch/arc/kernel/devtree.c
@@ -32,6 +32,8 @@
if (of_flat_dt_is_compatible(dt_root, "abilis,arc-tb10x"))
arc_base_baud = core_clk/3;
+ else if (of_flat_dt_is_compatible(dt_root, "snps,arc-sdp"))
+ arc_base_baud = 33333333; /* Fixed 33MHz clk (AXS10x) */
else
arc_base_baud = core_clk;
}
diff --git a/arch/arc/kernel/entry-arcv2.S b/arch/arc/kernel/entry-arcv2.S
new file mode 100644
index 0000000..bd7105d
--- /dev/null
+++ b/arch/arc/kernel/entry-arcv2.S
@@ -0,0 +1,239 @@
+/*
+ * ARCv2 ISA based core Low Level Intr/Traps/Exceptions(non-TLB) Handling
+ *
+ * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/linkage.h> /* ARC_{EXTRY,EXIT} */
+#include <asm/entry.h> /* SAVE_ALL_{INT1,INT2,TRAP...} */
+#include <asm/errno.h>
+#include <asm/arcregs.h>
+#include <asm/irqflags.h>
+
+ .cpu HS
+
+#define VECTOR .word
+
+;############################ Vector Table #################################
+
+ .section .vector,"a",@progbits
+ .align 4
+
+# Initial 16 slots are Exception Vectors
+VECTOR stext ; Restart Vector (jump to entry point)
+VECTOR mem_service ; Mem exception
+VECTOR instr_service ; Instrn Error
+VECTOR EV_MachineCheck ; Fatal Machine check
+VECTOR EV_TLBMissI ; Intruction TLB miss
+VECTOR EV_TLBMissD ; Data TLB miss
+VECTOR EV_TLBProtV ; Protection Violation
+VECTOR EV_PrivilegeV ; Privilege Violation
+VECTOR EV_SWI ; Software Breakpoint
+VECTOR EV_Trap ; Trap exception
+VECTOR EV_Extension ; Extn Instruction Exception
+VECTOR EV_DivZero ; Divide by Zero
+VECTOR EV_DCError ; Data Cache Error
+VECTOR EV_Misaligned ; Misaligned Data Access
+VECTOR reserved ; Reserved slots
+VECTOR reserved ; Reserved slots
+
+# Begin Interrupt Vectors
+VECTOR handle_interrupt ; (16) Timer0
+VECTOR handle_interrupt ; unused (Timer1)
+VECTOR handle_interrupt ; unused (WDT)
+VECTOR handle_interrupt ; (19) ICI (inter core interrupt)
+VECTOR handle_interrupt
+VECTOR handle_interrupt
+VECTOR handle_interrupt
+VECTOR handle_interrupt ; (23) End of fixed IRQs
+
+.rept CONFIG_ARC_NUMBER_OF_INTERRUPTS - 8
+ VECTOR handle_interrupt
+.endr
+
+ .section .text, "ax",@progbits
+
+res_service: ; processor restart
+ flag 0x1 ; not implemented
+ nop
+ nop
+
+reserved: ; processor restart
+ rtie ; jump to processor initializations
+
+;##################### Interrupt Handling ##############################
+
+ENTRY(handle_interrupt)
+
+ INTERRUPT_PROLOGUE irq
+
+ clri ; To make status32.IE agree with CPU internal state
+
+ lr r0, [ICAUSE]
+
+ mov blink, ret_from_exception
+
+ b.d arch_do_IRQ
+ mov r1, sp
+
+END(handle_interrupt)
+
+;################### Non TLB Exception Handling #############################
+
+ENTRY(EV_SWI)
+ flag 1
+END(EV_SWI)
+
+ENTRY(EV_DivZero)
+ flag 1
+END(EV_DivZero)
+
+ENTRY(EV_DCError)
+ flag 1
+END(EV_DCError)
+
+ENTRY(EV_Misaligned)
+
+ EXCEPTION_PROLOGUE
+
+ lr r0, [efa] ; Faulting Data address
+ mov r1, sp
+
+ FAKE_RET_FROM_EXCPN
+
+ SAVE_CALLEE_SAVED_USER
+ mov r2, sp ; callee_regs
+
+ bl do_misaligned_access
+
+ ; TBD: optimize - do this only if a callee reg was involved
+ ; either a dst of emulated LD/ST or src with address-writeback
+ RESTORE_CALLEE_SAVED_USER
+
+ b ret_from_exception
+END(EV_Misaligned)
+
+; ---------------------------------------------
+; Protection Violation Exception Handler
+; ---------------------------------------------
+
+ENTRY(EV_TLBProtV)
+
+ EXCEPTION_PROLOGUE
+
+ lr r0, [efa] ; Faulting Data address
+ mov r1, sp ; pt_regs
+
+ FAKE_RET_FROM_EXCPN
+
+ mov blink, ret_from_exception
+ b do_page_fault
+
+END(EV_TLBProtV)
+
+; From Linux standpoint Slow Path I/D TLB Miss is same a ProtV as they
+; need to call do_page_fault().
+; ECR in pt_regs provides whether access was R/W/X
+
+.global call_do_page_fault
+.set call_do_page_fault, EV_TLBProtV
+
+;############# Common Handlers for ARCompact and ARCv2 ##############
+
+#include "entry.S"
+
+;############# Return from Intr/Excp/Trap (ARCv2 ISA Specifics) ##############
+;
+; Restore the saved sys context (common exit-path for EXCPN/IRQ/Trap)
+; IRQ shd definitely not happen between now and rtie
+; All 2 entry points to here already disable interrupts
+
+.Lrestore_regs:
+
+ ld r0, [sp, PT_status32] ; U/K mode at time of entry
+ lr r10, [AUX_IRQ_ACT]
+
+ bmsk r11, r10, 15 ; AUX_IRQ_ACT.ACTIVE
+ breq r11, 0, .Lexcept_ret ; No intr active, ret from Exception
+
+;####### Return from Intr #######
+
+debug_marker_l1:
+ bbit1.nt r0, STATUS_DE_BIT, .Lintr_ret_to_delay_slot
+
+.Lisr_ret_fast_path:
+ ; Handle special case #1: (Entry via Exception, Return via IRQ)
+ ;
+ ; Exception in U mode, preempted in kernel, Intr taken (K mode), orig
+ ; task now returning to U mode (riding the Intr)
+ ; AUX_IRQ_ACTIVE won't have U bit set (since intr in K mode), hence SP
+ ; won't be switched to correct U mode value (from AUX_SP)
+ ; So force AUX_IRQ_ACT.U for such a case
+
+ btst r0, STATUS_U_BIT ; Z flag set if K (Z clear for U)
+ bset.nz r11, r11, AUX_IRQ_ACT_BIT_U ; NZ means U
+ sr r11, [AUX_IRQ_ACT]
+
+ INTERRUPT_EPILOGUE irq
+ rtie
+
+;####### Return from Exception / pure kernel mode #######
+
+.Lexcept_ret: ; Expects r0 has PT_status32
+
+debug_marker_syscall:
+ EXCEPTION_EPILOGUE
+ rtie
+
+;####### Return from Intr to insn in delay slot #######
+
+; Handle special case #2: (Entry via Exception in Delay Slot, Return via IRQ)
+;
+; Intr returning to a Delay Slot (DS) insn
+; (since IRQ NOT allowed in DS in ARCv2, this can only happen if orig
+; entry was via Exception in DS which got preempted in kernel).
+;
+; IRQ RTIE won't reliably restore DE bit and/or BTA, needs handling
+.Lintr_ret_to_delay_slot:
+debug_marker_ds:
+
+ ld r2, [@intr_to_DE_cnt]
+ add r2, r2, 1
+ st r2, [@intr_to_DE_cnt]
+
+ ld r2, [sp, PT_ret]
+ ld r3, [sp, PT_status32]
+
+ bic r0, r3, STATUS_U_MASK|STATUS_DE_MASK|STATUS_IE_MASK|STATUS_L_MASK
+ st r0, [sp, PT_status32]
+
+ mov r1, .Lintr_ret_to_delay_slot_2
+ st r1, [sp, PT_ret]
+
+ st r2, [sp, 0]
+ st r3, [sp, 4]
+
+ b .Lisr_ret_fast_path
+
+.Lintr_ret_to_delay_slot_2:
+ sub sp, sp, SZ_PT_REGS
+ st r9, [sp, -4]
+
+ ld r9, [sp, 0]
+ sr r9, [eret]
+
+ ld r9, [sp, 4]
+ sr r9, [erstatus]
+
+ ld r9, [sp, 8]
+ sr r9, [erbta]
+
+ ld r9, [sp, -4]
+ add sp, sp, SZ_PT_REGS
+ rtie
+
+END(ret_from_exception)
diff --git a/arch/arc/kernel/entry-compact.S b/arch/arc/kernel/entry-compact.S
new file mode 100644
index 0000000..15d457b
--- /dev/null
+++ b/arch/arc/kernel/entry-compact.S
@@ -0,0 +1,393 @@
+/*
+ * Low Level Interrupts/Traps/Exceptions(non-TLB) Handling for ARCompact ISA
+ *
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * vineetg: May 2011
+ * -Userspace unaligned access emulation
+ *
+ * vineetg: Feb 2011 (ptrace low level code fixes)
+ * -traced syscall return code (r0) was not saved into pt_regs for restoring
+ * into user reg-file when traded task rets to user space.
+ * -syscalls needing arch-wrappers (mainly for passing sp as pt_regs)
+ * were not invoking post-syscall trace hook (jumping directly into
+ * ret_from_system_call)
+ *
+ * vineetg: Nov 2010:
+ * -Vector table jumps (@8 bytes) converted into branches (@4 bytes)
+ * -To maintain the slot size of 8 bytes/vector, added nop, which is
+ * not executed at runtime.
+ *
+ * vineetg: Nov 2009 (Everything needed for TIF_RESTORE_SIGMASK)
+ * -do_signal()invoked upon TIF_RESTORE_SIGMASK as well
+ * -Wrappers for sys_{,rt_}sigsuspend() nolonger needed as they don't
+ * need ptregs anymore
+ *
+ * Vineetg: Oct 2009
+ * -In a rare scenario, Process gets a Priv-V exception and gets scheduled
+ * out. Since we don't do FAKE RTIE for Priv-V, CPU excpetion state remains
+ * active (AE bit enabled). This causes a double fault for a subseq valid
+ * exception. Thus FAKE RTIE needed in low level Priv-Violation handler.
+ * Instr Error could also cause similar scenario, so same there as well.
+ *
+ * Vineetg: March 2009 (Supporting 2 levels of Interrupts)
+ *
+ * Vineetg: Aug 28th 2008: Bug #94984
+ * -Zero Overhead Loop Context shd be cleared when entering IRQ/EXcp/Trap
+ * Normally CPU does this automatically, however when doing FAKE rtie,
+ * we need to explicitly do this. The problem in macros
+ * FAKE_RET_FROM_EXCPN and FAKE_RET_FROM_EXCPN_LOCK_IRQ was that this bit
+ * was being "CLEARED" rather then "SET". Since it is Loop INHIBIT Bit,
+ * setting it and not clearing it clears ZOL context
+ *
+ * Vineetg: May 16th, 2008
+ * - r25 now contains the Current Task when in kernel
+ *
+ * Vineetg: Dec 22, 2007
+ * Minor Surgery of Low Level ISR to make it SMP safe
+ * - MMU_SCRATCH0 Reg used for freeing up r9 in Level 1 ISR
+ * - _current_task is made an array of NR_CPUS
+ * - Access of _current_task wrapped inside a macro so that if hardware
+ * team agrees for a dedicated reg, no other code is touched
+ *
+ * Amit Bhor, Rahul Trivedi, Kanika Nema, Sameer Dhavale : Codito Tech 2004
+ */
+
+#include <linux/errno.h>
+#include <linux/linkage.h> /* {EXTRY,EXIT} */
+#include <asm/entry.h>
+#include <asm/irqflags.h>
+
+ .cpu A7
+
+;############################ Vector Table #################################
+
+.macro VECTOR lbl
+#if 1 /* Just in case, build breaks */
+ j \lbl
+#else
+ b \lbl
+ nop
+#endif
+.endm
+
+ .section .vector, "ax",@progbits
+ .align 4
+
+/* Each entry in the vector table must occupy 2 words. Since it is a jump
+ * across sections (.vector to .text) we are gauranteed that 'j somewhere'
+ * will use the 'j limm' form of the intrsuction as long as somewhere is in
+ * a section other than .vector.
+ */
+
+; ********* Critical System Events **********************
+VECTOR res_service ; 0x0, Restart Vector (0x0)
+VECTOR mem_service ; 0x8, Mem exception (0x1)
+VECTOR instr_service ; 0x10, Instrn Error (0x2)
+
+; ******************** Device ISRs **********************
+#ifdef CONFIG_ARC_IRQ3_LV2
+VECTOR handle_interrupt_level2
+#else
+VECTOR handle_interrupt_level1
+#endif
+
+VECTOR handle_interrupt_level1
+
+#ifdef CONFIG_ARC_IRQ5_LV2
+VECTOR handle_interrupt_level2
+#else
+VECTOR handle_interrupt_level1
+#endif
+
+#ifdef CONFIG_ARC_IRQ6_LV2
+VECTOR handle_interrupt_level2
+#else
+VECTOR handle_interrupt_level1
+#endif
+
+.rept 25
+VECTOR handle_interrupt_level1 ; Other devices
+.endr
+
+/* FOR ARC600: timer = 0x3, uart = 0x8, emac = 0x10 */
+
+; ******************** Exceptions **********************
+VECTOR EV_MachineCheck ; 0x100, Fatal Machine check (0x20)
+VECTOR EV_TLBMissI ; 0x108, Intruction TLB miss (0x21)
+VECTOR EV_TLBMissD ; 0x110, Data TLB miss (0x22)
+VECTOR EV_TLBProtV ; 0x118, Protection Violation (0x23)
+ ; or Misaligned Access
+VECTOR EV_PrivilegeV ; 0x120, Privilege Violation (0x24)
+VECTOR EV_Trap ; 0x128, Trap exception (0x25)
+VECTOR EV_Extension ; 0x130, Extn Intruction Excp (0x26)
+
+.rept 24
+VECTOR reserved ; Reserved Exceptions
+.endr
+
+
+;##################### Scratch Mem for IRQ stack switching #############
+
+ARCFP_DATA int1_saved_reg
+ .align 32
+ .type int1_saved_reg, @object
+ .size int1_saved_reg, 4
+int1_saved_reg:
+ .zero 4
+
+/* Each Interrupt level needs its own scratch */
+#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
+
+ARCFP_DATA int2_saved_reg
+ .type int2_saved_reg, @object
+ .size int2_saved_reg, 4
+int2_saved_reg:
+ .zero 4
+
+#endif
+
+; ---------------------------------------------
+ .section .text, "ax",@progbits
+
+res_service: ; processor restart
+ flag 0x1 ; not implemented
+ nop
+ nop
+
+reserved: ; processor restart
+ rtie ; jump to processor initializations
+
+;##################### Interrupt Handling ##############################
+
+#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
+; ---------------------------------------------
+; Level 2 ISR: Can interrupt a Level 1 ISR
+; ---------------------------------------------
+ENTRY(handle_interrupt_level2)
+
+ INTERRUPT_PROLOGUE 2
+
+ ;------------------------------------------------------
+ ; if L2 IRQ interrupted a L1 ISR, disable preemption
+ ;------------------------------------------------------
+
+ ld r9, [sp, PT_status32] ; get statu32_l2 (saved in pt_regs)
+ bbit0 r9, STATUS_A1_BIT, 1f ; L1 not active when L2 IRQ, so normal
+
+ ; A1 is set in status32_l2
+ ; bump thread_info->preempt_count (Disable preemption)
+ GET_CURR_THR_INFO_FROM_SP r10
+ ld r9, [r10, THREAD_INFO_PREEMPT_COUNT]
+ add r9, r9, 1
+ st r9, [r10, THREAD_INFO_PREEMPT_COUNT]
+
+1:
+ ;------------------------------------------------------
+ ; setup params for Linux common ISR and invoke it
+ ;------------------------------------------------------
+ lr r0, [icause2]
+ and r0, r0, 0x1f
+
+ bl.d @arch_do_IRQ
+ mov r1, sp
+
+ mov r8,0x2
+ sr r8, [AUX_IRQ_LV12] ; clear bit in Sticky Status Reg
+
+ b ret_from_exception
+
+END(handle_interrupt_level2)
+
+#endif
+
+; ---------------------------------------------
+; Level 1 ISR
+; ---------------------------------------------
+ENTRY(handle_interrupt_level1)
+
+ INTERRUPT_PROLOGUE 1
+
+ lr r0, [icause1]
+ and r0, r0, 0x1f
+
+#ifdef CONFIG_TRACE_IRQFLAGS
+ ; icause1 needs to be read early, before calling tracing, which
+ ; can clobber scratch regs, hence use of stack to stash it
+ push r0
+ TRACE_ASM_IRQ_DISABLE
+ pop r0
+#endif
+
+ bl.d @arch_do_IRQ
+ mov r1, sp
+
+ mov r8,0x1
+ sr r8, [AUX_IRQ_LV12] ; clear bit in Sticky Status Reg
+
+ b ret_from_exception
+END(handle_interrupt_level1)
+
+;################### Non TLB Exception Handling #############################
+
+; ---------------------------------------------
+; Protection Violation Exception Handler
+; ---------------------------------------------
+
+ENTRY(EV_TLBProtV)
+
+ EXCEPTION_PROLOGUE
+
+ lr r2, [ecr]
+ lr r0, [efa] ; Faulting Data address (not part of pt_regs saved above)
+
+ ; Exception auto-disables further Intr/exceptions.
+ ; Re-enable them by pretending to return from exception
+ ; (so rest of handler executes in pure K mode)
+
+ FAKE_RET_FROM_EXCPN
+
+ mov r1, sp ; Handle to pt_regs
+
+ ;------ (5) Type of Protection Violation? ----------
+ ;
+ ; ProtV Hardware Exception is triggered for Access Faults of 2 types
+ ; -Access Violaton : 00_23_(00|01|02|03)_00
+ ; x r w r+w
+ ; -Unaligned Access : 00_23_04_00
+ ;
+ bbit1 r2, ECR_C_BIT_PROTV_MISALIG_DATA, 4f
+
+ ;========= (6a) Access Violation Processing ========
+ bl do_page_fault
+ b ret_from_exception
+
+ ;========== (6b) Non aligned access ============
+4:
+
+ SAVE_CALLEE_SAVED_USER
+ mov r2, sp ; callee_regs
+
+ bl do_misaligned_access
+
+ ; TBD: optimize - do this only if a callee reg was involved
+ ; either a dst of emulated LD/ST or src with address-writeback
+ RESTORE_CALLEE_SAVED_USER
+
+ b ret_from_exception
+
+END(EV_TLBProtV)
+
+; Wrapper for Linux page fault handler called from EV_TLBMiss*
+; Very similar to ProtV handler case (6a) above, but avoids the extra checks
+; for Misaligned access
+;
+ENTRY(call_do_page_fault)
+
+ EXCEPTION_PROLOGUE
+ lr r0, [efa] ; Faulting Data address
+ mov r1, sp
+ FAKE_RET_FROM_EXCPN
+
+ mov blink, ret_from_exception
+ b do_page_fault
+
+END(call_do_page_fault)
+
+;############# Common Handlers for ARCompact and ARCv2 ##############
+
+#include "entry.S"
+
+;############# Return from Intr/Excp/Trap (ARC Specifics) ##############
+;
+; Restore the saved sys context (common exit-path for EXCPN/IRQ/Trap)
+; IRQ shd definitely not happen between now and rtie
+; All 2 entry points to here already disable interrupts
+
+.Lrestore_regs:
+
+ TRACE_ASM_IRQ_ENABLE
+
+ lr r10, [status32]
+
+ ; Restore REG File. In case multiple Events outstanding,
+ ; use the same priorty as rtie: EXCPN, L2 IRQ, L1 IRQ, None
+ ; Note that we use realtime STATUS32 (not pt_regs->status32) to
+ ; decide that.
+
+ ; if Returning from Exception
+ btst r10, STATUS_AE_BIT
+ bnz .Lexcep_ret
+
+ ; Not Exception so maybe Interrupts (Level 1 or 2)
+
+#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
+
+ ; Level 2 interrupt return Path - from hardware standpoint
+ bbit0 r10, STATUS_A2_BIT, not_level2_interrupt
+
+ ;------------------------------------------------------------------
+ ; However the context returning might not have taken L2 intr itself
+ ; e.g. Task'A' user-code -> L2 intr -> schedule -> 'B' user-code ret
+ ; Special considerations needed for the context which took L2 intr
+
+ ld r9, [sp, PT_event] ; Ensure this is L2 intr context
+ brne r9, event_IRQ2, 149f
+
+ ;------------------------------------------------------------------
+ ; if L2 IRQ interrupted an L1 ISR, we'd disabled preemption earlier
+ ; so that sched doesn't move to new task, causing L1 to be delayed
+ ; undeterministically. Now that we've achieved that, let's reset
+ ; things to what they were, before returning from L2 context
+ ;----------------------------------------------------------------
+
+ ld r9, [sp, PT_status32] ; get statu32_l2 (saved in pt_regs)
+ bbit0 r9, STATUS_A1_BIT, 149f ; L1 not active when L2 IRQ, so normal
+
+ ; decrement thread_info->preempt_count (re-enable preemption)
+ GET_CURR_THR_INFO_FROM_SP r10
+ ld r9, [r10, THREAD_INFO_PREEMPT_COUNT]
+
+ ; paranoid check, given A1 was active when A2 happened, preempt count
+ ; must not be 0 because we would have incremented it.
+ ; If this does happen we simply HALT as it means a BUG !!!
+ cmp r9, 0
+ bnz 2f
+ flag 1
+
+2:
+ sub r9, r9, 1
+ st r9, [r10, THREAD_INFO_PREEMPT_COUNT]
+
+149:
+ ;return from level 2
+ INTERRUPT_EPILOGUE 2
+debug_marker_l2:
+ rtie
+
+not_level2_interrupt:
+
+#endif
+
+ bbit0 r10, STATUS_A1_BIT, .Lpure_k_mode_ret
+
+ ;return from level 1
+ INTERRUPT_EPILOGUE 1
+debug_marker_l1:
+ rtie
+
+.Lexcep_ret:
+.Lpure_k_mode_ret:
+
+ ;this case is for syscalls or Exceptions or pure kernel mode
+
+ EXCEPTION_EPILOGUE
+debug_marker_syscall:
+ rtie
+
+END(ret_from_exception)
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S
index d868289..f7a82fd 100644
--- a/arch/arc/kernel/entry.S
+++ b/arch/arc/kernel/entry.S
@@ -1,60 +1,13 @@
/*
- * Low Level Interrupts/Traps/Exceptions(non-TLB) Handling for ARC
+ * Common Low Level Interrupts/Traps/Exceptions(non-TLB) Handling for ARC
+ * (included from entry-<isa>.S
*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
- *
- * vineetg: May 2011
- * -Userspace unaligned access emulation
- *
- * vineetg: Feb 2011 (ptrace low level code fixes)
- * -traced syscall return code (r0) was not saved into pt_regs for restoring
- * into user reg-file when traded task rets to user space.
- * -syscalls needing arch-wrappers (mainly for passing sp as pt_regs)
- * were not invoking post-syscall trace hook (jumping directly into
- * ret_from_system_call)
- *
- * vineetg: Nov 2010:
- * -Vector table jumps (@8 bytes) converted into branches (@4 bytes)
- * -To maintain the slot size of 8 bytes/vector, added nop, which is
- * not executed at runtime.
- *
- * vineetg: Nov 2009 (Everything needed for TIF_RESTORE_SIGMASK)
- * -do_signal()invoked upon TIF_RESTORE_SIGMASK as well
- * -Wrappers for sys_{,rt_}sigsuspend() nolonger needed as they don't
- * need ptregs anymore
- *
- * Vineetg: Oct 2009
- * -In a rare scenario, Process gets a Priv-V exception and gets scheduled
- * out. Since we don't do FAKE RTIE for Priv-V, CPU excpetion state remains
- * active (AE bit enabled). This causes a double fault for a subseq valid
- * exception. Thus FAKE RTIE needed in low level Priv-Violation handler.
- * Instr Error could also cause similar scenario, so same there as well.
- *
- * Vineetg: March 2009 (Supporting 2 levels of Interrupts)
- *
- * Vineetg: Aug 28th 2008: Bug #94984
- * -Zero Overhead Loop Context shd be cleared when entering IRQ/EXcp/Trap
- * Normally CPU does this automatically, however when doing FAKE rtie,
- * we need to explicitly do this. The problem in macros
- * FAKE_RET_FROM_EXCPN and FAKE_RET_FROM_EXCPN_LOCK_IRQ was that this bit
- * was being "CLEARED" rather then "SET". Since it is Loop INHIBIT Bit,
- * setting it and not clearing it clears ZOL context
- *
- * Vineetg: May 16th, 2008
- * - r25 now contains the Current Task when in kernel
- *
- * Vineetg: Dec 22, 2007
- * Minor Surgery of Low Level ISR to make it SMP safe
- * - MMU_SCRATCH0 Reg used for freeing up r9 in Level 1 ISR
- * - _current_task is made an array of NR_CPUS
- * - Access of _current_task wrapped inside a macro so that if hardware
- * team agrees for a dedicated reg, no other code is touched
- *
- * Amit Bhor, Rahul Trivedi, Kanika Nema, Sameer Dhavale : Codito Tech 2004
*/
/*------------------------------------------------------------------
@@ -67,206 +20,59 @@
* Global Pointer (gp) r26
* Frame Pointer (fp) r27
* Stack Pointer (sp) r28
- * Interrupt link register (ilink1) r29
- * Interrupt link register (ilink2) r30
* Branch link register (blink) r31
*------------------------------------------------------------------
*/
- .cpu A7
+;################### Special Sys Call Wrappers ##########################
-;############################ Vector Table #################################
+ENTRY(sys_clone_wrapper)
+ SAVE_CALLEE_SAVED_USER
+ bl @sys_clone
+ DISCARD_CALLEE_SAVED_USER
-.macro VECTOR lbl
-#if 1 /* Just in case, build breaks */
- j \lbl
-#else
- b \lbl
- nop
-#endif
-.endm
+ GET_CURR_THR_INFO_FLAGS r10
+ btst r10, TIF_SYSCALL_TRACE
+ bnz tracesys_exit
- .section .vector, "ax",@progbits
- .align 4
+ b ret_from_system_call
+END(sys_clone_wrapper)
-/* Each entry in the vector table must occupy 2 words. Since it is a jump
- * across sections (.vector to .text) we are gauranteed that 'j somewhere'
- * will use the 'j limm' form of the intrsuction as long as somewhere is in
- * a section other than .vector.
- */
+ENTRY(ret_from_fork)
+ ; when the forked child comes here from the __switch_to function
+ ; r0 has the last task pointer.
+ ; put last task in scheduler queue
+ bl @schedule_tail
-; ********* Critical System Events **********************
-VECTOR res_service ; 0x0, Restart Vector (0x0)
-VECTOR mem_service ; 0x8, Mem exception (0x1)
-VECTOR instr_service ; 0x10, Instrn Error (0x2)
+ ld r9, [sp, PT_status32]
+ brne r9, 0, 1f
-; ******************** Device ISRs **********************
-#ifdef CONFIG_ARC_IRQ3_LV2
-VECTOR handle_interrupt_level2
-#else
-VECTOR handle_interrupt_level1
-#endif
-
-VECTOR handle_interrupt_level1
-
-#ifdef CONFIG_ARC_IRQ5_LV2
-VECTOR handle_interrupt_level2
-#else
-VECTOR handle_interrupt_level1
-#endif
-
-#ifdef CONFIG_ARC_IRQ6_LV2
-VECTOR handle_interrupt_level2
-#else
-VECTOR handle_interrupt_level1
-#endif
-
-.rept 25
-VECTOR handle_interrupt_level1 ; Other devices
-.endr
-
-/* FOR ARC600: timer = 0x3, uart = 0x8, emac = 0x10 */
-
-; ******************** Exceptions **********************
-VECTOR EV_MachineCheck ; 0x100, Fatal Machine check (0x20)
-VECTOR EV_TLBMissI ; 0x108, Intruction TLB miss (0x21)
-VECTOR EV_TLBMissD ; 0x110, Data TLB miss (0x22)
-VECTOR EV_TLBProtV ; 0x118, Protection Violation (0x23)
- ; or Misaligned Access
-VECTOR EV_PrivilegeV ; 0x120, Privilege Violation (0x24)
-VECTOR EV_Trap ; 0x128, Trap exception (0x25)
-VECTOR EV_Extension ; 0x130, Extn Intruction Excp (0x26)
-
-.rept 24
-VECTOR reserved ; Reserved Exceptions
-.endr
-
-#include <linux/linkage.h> /* {EXTRY,EXIT} */
-#include <asm/entry.h> /* SAVE_ALL_{INT1,INT2,SYS...} */
-#include <asm/errno.h>
-#include <asm/arcregs.h>
-#include <asm/irqflags.h>
-
-;##################### Scratch Mem for IRQ stack switching #############
-
-ARCFP_DATA int1_saved_reg
- .align 32
- .type int1_saved_reg, @object
- .size int1_saved_reg, 4
-int1_saved_reg:
- .zero 4
-
-/* Each Interrupt level needs its own scratch */
-#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
-
-ARCFP_DATA int2_saved_reg
- .type int2_saved_reg, @object
- .size int2_saved_reg, 4
-int2_saved_reg:
- .zero 4
-
-#endif
-
-; ---------------------------------------------
- .section .text, "ax",@progbits
-
-res_service: ; processor restart
- flag 0x1 ; not implemented
- nop
- nop
-
-reserved: ; processor restart
- rtie ; jump to processor initializations
-
-;##################### Interrupt Handling ##############################
-
-#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
-; ---------------------------------------------
-; Level 2 ISR: Can interrupt a Level 1 ISR
-; ---------------------------------------------
-ENTRY(handle_interrupt_level2)
-
- ; TODO-vineetg for SMP this wont work
- ; free up r9 as scratchpad
- st r9, [@int2_saved_reg]
-
- ;Which mode (user/kernel) was the system in when intr occured
- lr r9, [status32_l2]
-
- SWITCH_TO_KERNEL_STK
- SAVE_ALL_INT2
-
- ;------------------------------------------------------
- ; if L2 IRQ interrupted a L1 ISR, disable preemption
- ;------------------------------------------------------
-
- ld r9, [sp, PT_status32] ; get statu32_l2 (saved in pt_regs)
- bbit0 r9, STATUS_A1_BIT, 1f ; L1 not active when L2 IRQ, so normal
-
- ; A1 is set in status32_l2
- ; bump thread_info->preempt_count (Disable preemption)
- GET_CURR_THR_INFO_FROM_SP r10
- ld r9, [r10, THREAD_INFO_PREEMPT_COUNT]
- add r9, r9, 1
- st r9, [r10, THREAD_INFO_PREEMPT_COUNT]
+ jl.d [r14] ; kernel thread entry point
+ mov r0, r13 ; (see PF_KTHREAD block in copy_thread)
1:
- ;------------------------------------------------------
- ; setup params for Linux common ISR and invoke it
- ;------------------------------------------------------
- lr r0, [icause2]
- and r0, r0, 0x1f
+ ; Return to user space
+ ; 1. Any forked task (Reach here via BRne above)
+ ; 2. First ever init task (Reach here via return from JL above)
+ ; This is the historic "kernel_execve" use-case, to return to init
+ ; user mode, in a round about way since that is always done from
+ ; a kernel thread which is executed via JL above but always returns
+ ; out whenever kernel_execve (now inline do_fork()) is involved
+ b ret_from_exception
+END(ret_from_fork)
- bl.d @arch_do_IRQ
- mov r1, sp
+#ifdef CONFIG_ARC_DW2_UNWIND
+; Workaround for bug 94179 (STAR ):
+; Despite -fasynchronous-unwind-tables, linker is not making dwarf2 unwinder
+; section (.debug_frame) as loadable. So we force it here.
+; This also fixes STAR 9000487933 where the prev-workaround (objcopy --setflag)
+; would not work after a clean build due to kernel build system dependencies.
+.section .debug_frame, "wa",@progbits
- mov r8,0x2
- sr r8, [AUX_IRQ_LV12] ; clear bit in Sticky Status Reg
-
- b ret_from_exception
-
-END(handle_interrupt_level2)
-
+; Reset to .text as this file is included in entry-<isa>.S
+.section .text, "ax",@progbits
#endif
-; ---------------------------------------------
-; Level 1 ISR
-; ---------------------------------------------
-ENTRY(handle_interrupt_level1)
-
- /* free up r9 as scratchpad */
-#ifdef CONFIG_SMP
- sr r9, [ARC_REG_SCRATCH_DATA0]
-#else
- st r9, [@int1_saved_reg]
-#endif
-
- ;Which mode (user/kernel) was the system in when intr occured
- lr r9, [status32_l1]
-
- SWITCH_TO_KERNEL_STK
- SAVE_ALL_INT1
-
- lr r0, [icause1]
- and r0, r0, 0x1f
-
-#ifdef CONFIG_TRACE_IRQFLAGS
- ; icause1 needs to be read early, before calling tracing, which
- ; can clobber scratch regs, hence use of stack to stash it
- push r0
- TRACE_ASM_IRQ_DISABLE
- pop r0
-#endif
-
- bl.d @arch_do_IRQ
- mov r1, sp
-
- mov r8,0x1
- sr r8, [AUX_IRQ_LV12] ; clear bit in Sticky Status Reg
-
- b ret_from_exception
-END(handle_interrupt_level1)
-
;################### Non TLB Exception Handling #############################
; ---------------------------------------------
@@ -280,7 +86,7 @@
lr r0, [efa]
mov r1, sp
- FAKE_RET_FROM_EXCPN r9
+ FAKE_RET_FROM_EXCPN
bl do_insterror_or_kprobe
b ret_from_exception
@@ -297,7 +103,7 @@
lr r0, [efa]
mov r1, sp
- FAKE_RET_FROM_EXCPN r9
+ FAKE_RET_FROM_EXCPN
bl do_memory_error
b ret_from_exception
@@ -334,60 +140,6 @@
END(EV_MachineCheck)
; ---------------------------------------------
-; Protection Violation Exception Handler
-; ---------------------------------------------
-
-ENTRY(EV_TLBProtV)
-
- EXCEPTION_PROLOGUE
-
- ;---------(3) Save some more regs-----------------
- ; vineetg: Mar 6th: Random Seg Fault issue #1
- ; ecr and efa were not saved in case an Intr sneaks in
- ; after fake rtie
-
- lr r2, [ecr]
- lr r0, [efa] ; Faulting Data address
-
- ; --------(4) Return from CPU Exception Mode ---------
- ; Fake a rtie, but rtie to next label
- ; That way, subsequently, do_page_fault ( ) executes in pure kernel
- ; mode with further Exceptions enabled
-
- FAKE_RET_FROM_EXCPN r9
-
- mov r1, sp
-
- ;------ (5) Type of Protection Violation? ----------
- ;
- ; ProtV Hardware Exception is triggered for Access Faults of 2 types
- ; -Access Violaton : 00_23_(00|01|02|03)_00
- ; x r w r+w
- ; -Unaligned Access : 00_23_04_00
- ;
- bbit1 r2, ECR_C_BIT_PROTV_MISALIG_DATA, 4f
-
- ;========= (6a) Access Violation Processing ========
- bl do_page_fault
- b ret_from_exception
-
- ;========== (6b) Non aligned access ============
-4:
-
- SAVE_CALLEE_SAVED_USER
- mov r2, sp ; callee_regs
-
- bl do_misaligned_access
-
- ; TBD: optimize - do this only if a callee reg was involved
- ; either a dst of emulated LD/ST or src with address-writeback
- RESTORE_CALLEE_SAVED_USER
-
- b ret_from_exception
-
-END(EV_TLBProtV)
-
-; ---------------------------------------------
; Privilege Violation Exception Handler
; ---------------------------------------------
ENTRY(EV_PrivilegeV)
@@ -397,7 +149,7 @@
lr r0, [efa]
mov r1, sp
- FAKE_RET_FROM_EXCPN r9
+ FAKE_RET_FROM_EXCPN
bl do_privilege_fault
b ret_from_exception
@@ -413,14 +165,17 @@
lr r0, [efa]
mov r1, sp
- FAKE_RET_FROM_EXCPN r9
+ FAKE_RET_FROM_EXCPN
bl do_extension_fault
b ret_from_exception
END(EV_Extension)
-;######################### System Call Tracing #########################
+;################ Trap Handling (Syscall, Breakpoint) ##################
+; ---------------------------------------------
+; syscall Tracing
+; ---------------------------------------------
tracesys:
; save EFA in case tracer wants the PC of traced task
; using ERET won't work since next-PC has already committed
@@ -463,10 +218,9 @@
b ret_from_exception ; NOT ret_from_system_call at is saves r0 which
; we'd done before calling post hook above
-;################### Break Point TRAP ##########################
-
- ; ======= (5b) Trap is due to Break-Point =========
-
+; ---------------------------------------------
+; Breakpoint TRAP
+; ---------------------------------------------
trap_with_param:
; stop_pc info by gdb needs this info
@@ -475,7 +229,7 @@
; Now that we have read EFA, it is safe to do "fake" rtie
; and get out of CPU exception mode
- FAKE_RET_FROM_EXCPN r11
+ FAKE_RET_FROM_EXCPN
; Save callee regs in case gdb wants to have a look
; SP will grow up by size of CALLEE Reg-File
@@ -494,37 +248,33 @@
b ret_from_exception
-;##################### Trap Handling ##############################
-;
-; EV_Trap caused by TRAP_S and TRAP0 instructions.
-;------------------------------------------------------------------
-; (1) System Calls
-; :parameters in r0-r7.
-; :r8 has the system call number
-; (2) Break Points
-;------------------------------------------------------------------
+; ---------------------------------------------
+; syscall TRAP
+; ABI: (r0-r7) upto 8 args, (r8) syscall number
+; ---------------------------------------------
ENTRY(EV_Trap)
EXCEPTION_PROLOGUE
- ;------- (4) What caused the Trap --------------
- lr r12, [ecr]
- bmsk.f 0, r12, 7
+ ;============ TRAP 1 :breakpoints
+ ; Check ECR for trap with arg (PROLOGUE ensures r9 has ECR)
+ bmsk.f 0, r9, 7
bnz trap_with_param
- ; ======= (5a) Trap is due to System Call ========
+ ;============ TRAP (no param): syscall top level
- ; Before doing anything, return from CPU Exception Mode
- FAKE_RET_FROM_EXCPN r11
+ ; First return from Exception to pure K mode (Exception/IRQs renabled)
+ FAKE_RET_FROM_EXCPN
- ; If syscall tracing ongoing, invoke pre-pos-hooks
+ ; If syscall tracing ongoing, invoke pre-post-hooks
GET_CURR_THR_INFO_FLAGS r10
btst r10, TIF_SYSCALL_TRACE
bnz tracesys ; this never comes back
- ;============ This is normal System Call case ==========
- ; Sys-call num shd not exceed the total system calls avail
+ ;============ Normal syscall case
+
+ ; syscall num shd not exceed the total system calls avail
cmp r8, NR_syscalls
mov.hi r0, -ENOSYS
bhi ret_from_system_call
@@ -565,7 +315,7 @@
; Fast Path return to user mode if no pending work
GET_CURR_THR_INFO_FLAGS r9
and.f 0, r9, _TIF_WORK_MASK
- bz restore_regs
+ bz .Lrestore_regs
; --- (Slow Path #1) task preemption ---
bbit0 r9, TIF_NEED_RESCHED, .Lchk_pend_signals
@@ -624,11 +374,11 @@
; Can't preempt if preemption disabled
GET_CURR_THR_INFO_FROM_SP r10
ld r8, [r10, THREAD_INFO_PREEMPT_COUNT]
- brne r8, 0, restore_regs
+ brne r8, 0, .Lrestore_regs
; check if this task's NEED_RESCHED flag set
ld r9, [r10, THREAD_INFO_FLAGS]
- bbit0 r9, TIF_NEED_RESCHED, restore_regs
+ bbit0 r9, TIF_NEED_RESCHED, .Lrestore_regs
; Invoke PREEMPTION
bl preempt_schedule_irq
@@ -636,142 +386,7 @@
; preempt_schedule_irq() always returns with IRQ disabled
#endif
- ; fall through
+ b .Lrestore_regs
-;############# Return from Intr/Excp/Trap (ARC Specifics) ##############
-;
-; Restore the saved sys context (common exit-path for EXCPN/IRQ/Trap)
-; IRQ shd definitely not happen between now and rtie
-; All 2 entry points to here already disable interrupts
+##### DONT ADD CODE HERE - .Lrestore_regs actually follows in entry-<isa>.S
-restore_regs :
-
- TRACE_ASM_IRQ_ENABLE
-
- lr r10, [status32]
-
- ; Restore REG File. In case multiple Events outstanding,
- ; use the same priorty as rtie: EXCPN, L2 IRQ, L1 IRQ, None
- ; Note that we use realtime STATUS32 (not pt_regs->status32) to
- ; decide that.
-
- ; if Returning from Exception
- bbit0 r10, STATUS_AE_BIT, not_exception
- RESTORE_ALL_SYS
- rtie
-
- ; Not Exception so maybe Interrupts (Level 1 or 2)
-
-not_exception:
-
-#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
-
- ; Level 2 interrupt return Path - from hardware standpoint
- bbit0 r10, STATUS_A2_BIT, not_level2_interrupt
-
- ;------------------------------------------------------------------
- ; However the context returning might not have taken L2 intr itself
- ; e.g. Task'A' user-code -> L2 intr -> schedule -> 'B' user-code ret
- ; Special considerations needed for the context which took L2 intr
-
- ld r9, [sp, PT_event] ; Ensure this is L2 intr context
- brne r9, event_IRQ2, 149f
-
- ;------------------------------------------------------------------
- ; if L2 IRQ interrupted an L1 ISR, we'd disabled preemption earlier
- ; so that sched doesn't move to new task, causing L1 to be delayed
- ; undeterministically. Now that we've achieved that, let's reset
- ; things to what they were, before returning from L2 context
- ;----------------------------------------------------------------
-
- ld r9, [sp, PT_status32] ; get statu32_l2 (saved in pt_regs)
- bbit0 r9, STATUS_A1_BIT, 149f ; L1 not active when L2 IRQ, so normal
-
- ; decrement thread_info->preempt_count (re-enable preemption)
- GET_CURR_THR_INFO_FROM_SP r10
- ld r9, [r10, THREAD_INFO_PREEMPT_COUNT]
-
- ; paranoid check, given A1 was active when A2 happened, preempt count
- ; must not be 0 because we would have incremented it.
- ; If this does happen we simply HALT as it means a BUG !!!
- cmp r9, 0
- bnz 2f
- flag 1
-
-2:
- sub r9, r9, 1
- st r9, [r10, THREAD_INFO_PREEMPT_COUNT]
-
-149:
- ;return from level 2
- RESTORE_ALL_INT2
-debug_marker_l2:
- rtie
-
-not_level2_interrupt:
-
-#endif
-
- bbit0 r10, STATUS_A1_BIT, not_level1_interrupt
-
- ;return from level 1
-
- RESTORE_ALL_INT1
-debug_marker_l1:
- rtie
-
-not_level1_interrupt:
-
- ;this case is for syscalls or Exceptions (with fake rtie)
-
- RESTORE_ALL_SYS
-debug_marker_syscall:
- rtie
-
-END(ret_from_exception)
-
-ENTRY(ret_from_fork)
- ; when the forked child comes here from the __switch_to function
- ; r0 has the last task pointer.
- ; put last task in scheduler queue
- bl @schedule_tail
-
- ld r9, [sp, PT_status32]
- brne r9, 0, 1f
-
- jl.d [r14] ; kernel thread entry point
- mov r0, r13 ; (see PF_KTHREAD block in copy_thread)
-
-1:
- ; Return to user space
- ; 1. Any forked task (Reach here via BRne above)
- ; 2. First ever init task (Reach here via return from JL above)
- ; This is the historic "kernel_execve" use-case, to return to init
- ; user mode, in a round about way since that is always done from
- ; a kernel thread which is executed via JL above but always returns
- ; out whenever kernel_execve (now inline do_fork()) is involved
- b ret_from_exception
-END(ret_from_fork)
-
-;################### Special Sys Call Wrappers ##########################
-
-ENTRY(sys_clone_wrapper)
- SAVE_CALLEE_SAVED_USER
- bl @sys_clone
- DISCARD_CALLEE_SAVED_USER
-
- GET_CURR_THR_INFO_FLAGS r10
- btst r10, TIF_SYSCALL_TRACE
- bnz tracesys_exit
-
- b ret_from_system_call
-END(sys_clone_wrapper)
-
-#ifdef CONFIG_ARC_DW2_UNWIND
-; Workaround for bug 94179 (STAR ):
-; Despite -fasynchronous-unwind-tables, linker is not making dwarf2 unwinder
-; section (.debug_frame) as loadable. So we force it here.
-; This also fixes STAR 9000487933 where the prev-workaround (objcopy --setflag)
-; would not work after a clean build due to kernel build system dependencies.
-.section .debug_frame, "wa",@progbits
-#endif
diff --git a/arch/arc/kernel/head.S b/arch/arc/kernel/head.S
index b0e8666..812f95e 100644
--- a/arch/arc/kernel/head.S
+++ b/arch/arc/kernel/head.S
@@ -49,8 +49,6 @@
1:
.endm
- .cpu A7
-
.section .init.text, "ax",@progbits
.type stext, @function
.globl stext
@@ -83,6 +81,7 @@
st.ab 0, [r5, 4]
1:
+#ifdef CONFIG_ARC_UBOOT_SUPPORT
; Uboot - kernel ABI
; r0 = [0] No uboot interaction, [1] cmdline in r2, [2] DTB in r2
; r1 = magic number (board identity, unused as of now
@@ -90,6 +89,7 @@
; These are handled later in setup_arch()
st r0, [@uboot_tag]
st r2, [@uboot_arg]
+#endif
; setup "current" tsk and optionally cache it in dedicated r25
mov r9, @init_task
diff --git a/arch/arc/kernel/intc-arcv2.c b/arch/arc/kernel/intc-arcv2.c
new file mode 100644
index 0000000..6208c63
--- /dev/null
+++ b/arch/arc/kernel/intc-arcv2.c
@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2014 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/irqdomain.h>
+#include <linux/irqchip.h>
+#include "../../drivers/irqchip/irqchip.h"
+#include <asm/irq.h>
+
+/*
+ * Early Hardware specific Interrupt setup
+ * -Called very early (start_kernel -> setup_arch -> setup_processor)
+ * -Platform Independent (must for any ARC Core)
+ * -Needed for each CPU (hence not foldable into init_IRQ)
+ */
+void arc_init_IRQ(void)
+{
+ unsigned int tmp;
+
+ struct aux_irq_ctrl {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int res3:18, save_idx_regs:1, res2:1,
+ save_u_to_u:1, save_lp_regs:1, save_blink:1,
+ res:4, save_nr_gpr_pairs:5;
+#else
+ unsigned int save_nr_gpr_pairs:5, res:4,
+ save_blink:1, save_lp_regs:1, save_u_to_u:1,
+ res2:1, save_idx_regs:1, res3:18;
+#endif
+ } ictrl;
+
+ *(unsigned int *)&ictrl = 0;
+
+ ictrl.save_nr_gpr_pairs = 6; /* r0 to r11 (r12 saved manually) */
+ ictrl.save_blink = 1;
+ ictrl.save_lp_regs = 1; /* LP_COUNT, LP_START, LP_END */
+ ictrl.save_u_to_u = 0; /* user ctxt saved on kernel stack */
+ ictrl.save_idx_regs = 1; /* JLI, LDI, EI */
+
+ WRITE_AUX(AUX_IRQ_CTRL, ictrl);
+
+ /* setup status32, don't enable intr yet as kernel doesn't want */
+ tmp = read_aux_reg(0xa);
+ tmp |= ISA_INIT_STATUS_BITS;
+ tmp &= ~STATUS_IE_MASK;
+ asm volatile("flag %0 \n"::"r"(tmp));
+
+ /*
+ * ARCv2 core intc provides multiple interrupt priorities (upto 16).
+ * Typical builds though have only two levels (0-high, 1-low)
+ * Linux by default uses lower prio 1 for most irqs, reserving 0 for
+ * NMI style interrupts in future (say perf)
+ *
+ * Read the intc BCR to confirm that Linux default priority is avail
+ * in h/w
+ *
+ * Note:
+ * IRQ_BCR[27..24] contains N-1 (for N priority levels) and prio level
+ * is 0 based.
+ */
+ tmp = (read_aux_reg(ARC_REG_IRQ_BCR) >> 24 ) & 0xF;
+ if (ARCV2_IRQ_DEF_PRIO > tmp)
+ panic("Linux default irq prio incorrect\n");
+}
+
+static void arcv2_irq_mask(struct irq_data *data)
+{
+ write_aux_reg(AUX_IRQ_SELECT, data->irq);
+ write_aux_reg(AUX_IRQ_ENABLE, 0);
+}
+
+static void arcv2_irq_unmask(struct irq_data *data)
+{
+ write_aux_reg(AUX_IRQ_SELECT, data->irq);
+ write_aux_reg(AUX_IRQ_ENABLE, 1);
+}
+
+void arcv2_irq_enable(struct irq_data *data)
+{
+ /* set default priority */
+ write_aux_reg(AUX_IRQ_SELECT, data->irq);
+ write_aux_reg(AUX_IRQ_PRIORITY, ARCV2_IRQ_DEF_PRIO);
+
+ /*
+ * hw auto enables (linux unmask) all by default
+ * So no need to do IRQ_ENABLE here
+ * XXX: However OSCI LAN need it
+ */
+ write_aux_reg(AUX_IRQ_ENABLE, 1);
+}
+
+static struct irq_chip arcv2_irq_chip = {
+ .name = "ARCv2 core Intc",
+ .irq_mask = arcv2_irq_mask,
+ .irq_unmask = arcv2_irq_unmask,
+ .irq_enable = arcv2_irq_enable
+};
+
+static int arcv2_irq_map(struct irq_domain *d, unsigned int irq,
+ irq_hw_number_t hw)
+{
+ if (irq == TIMER0_IRQ || irq == IPI_IRQ)
+ irq_set_chip_and_handler(irq, &arcv2_irq_chip, handle_percpu_irq);
+ else
+ irq_set_chip_and_handler(irq, &arcv2_irq_chip, handle_level_irq);
+
+ return 0;
+}
+
+static const struct irq_domain_ops arcv2_irq_ops = {
+ .xlate = irq_domain_xlate_onecell,
+ .map = arcv2_irq_map,
+};
+
+static struct irq_domain *root_domain;
+
+static int __init
+init_onchip_IRQ(struct device_node *intc, struct device_node *parent)
+{
+ if (parent)
+ panic("DeviceTree incore intc not a root irq controller\n");
+
+ root_domain = irq_domain_add_legacy(intc, NR_CPU_IRQS, 0, 0,
+ &arcv2_irq_ops, NULL);
+
+ if (!root_domain)
+ panic("root irq domain not avail\n");
+
+ /* with this we don't need to export root_domain */
+ irq_set_default_host(root_domain);
+
+ return 0;
+}
+
+IRQCHIP_DECLARE(arc_intc, "snps,archs-intc", init_onchip_IRQ);
diff --git a/arch/arc/kernel/intc-compact.c b/arch/arc/kernel/intc-compact.c
new file mode 100644
index 0000000..fcdddb63
--- /dev/null
+++ b/arch/arc/kernel/intc-compact.c
@@ -0,0 +1,226 @@
+/*
+ * Copyright (C) 2011-12 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/irqdomain.h>
+#include <linux/irqchip.h>
+#include "../../drivers/irqchip/irqchip.h"
+#include <asm/irq.h>
+
+/*
+ * Early Hardware specific Interrupt setup
+ * -Platform independent, needed for each CPU (not foldable into init_IRQ)
+ * -Called very early (start_kernel -> setup_arch -> setup_processor)
+ *
+ * what it does ?
+ * -Optionally, setup the High priority Interrupts as Level 2 IRQs
+ */
+void arc_init_IRQ(void)
+{
+ int level_mask = 0;
+
+ /* setup any high priority Interrupts (Level2 in ARCompact jargon) */
+ level_mask |= IS_ENABLED(CONFIG_ARC_IRQ3_LV2) << 3;
+ level_mask |= IS_ENABLED(CONFIG_ARC_IRQ5_LV2) << 5;
+ level_mask |= IS_ENABLED(CONFIG_ARC_IRQ6_LV2) << 6;
+
+ /*
+ * Write to register, even if no LV2 IRQs configured to reset it
+ * in case bootloader had mucked with it
+ */
+ write_aux_reg(AUX_IRQ_LEV, level_mask);
+
+ if (level_mask)
+ pr_info("Level-2 interrupts bitset %x\n", level_mask);
+}
+
+/*
+ * ARC700 core includes a simple on-chip intc supporting
+ * -per IRQ enable/disable
+ * -2 levels of interrupts (high/low)
+ * -all interrupts being level triggered
+ *
+ * To reduce platform code, we assume all IRQs directly hooked-up into intc.
+ * Platforms with external intc, hence cascaded IRQs, are free to over-ride
+ * below, per IRQ.
+ */
+
+static void arc_irq_mask(struct irq_data *data)
+{
+ unsigned int ienb;
+
+ ienb = read_aux_reg(AUX_IENABLE);
+ ienb &= ~(1 << data->irq);
+ write_aux_reg(AUX_IENABLE, ienb);
+}
+
+static void arc_irq_unmask(struct irq_data *data)
+{
+ unsigned int ienb;
+
+ ienb = read_aux_reg(AUX_IENABLE);
+ ienb |= (1 << data->irq);
+ write_aux_reg(AUX_IENABLE, ienb);
+}
+
+static struct irq_chip onchip_intc = {
+ .name = "ARC In-core Intc",
+ .irq_mask = arc_irq_mask,
+ .irq_unmask = arc_irq_unmask,
+};
+
+static int arc_intc_domain_map(struct irq_domain *d, unsigned int irq,
+ irq_hw_number_t hw)
+{
+ /*
+ * XXX: the IPI IRQ needs to be handled like TIMER too. However ARC core
+ * code doesn't own it (like TIMER0). ISS IDU / ezchip define it
+ * in platform header which can't be included here as it goes
+ * against multi-platform image philisophy
+ */
+ if (irq == TIMER0_IRQ)
+ irq_set_chip_and_handler(irq, &onchip_intc, handle_percpu_irq);
+ else
+ irq_set_chip_and_handler(irq, &onchip_intc, handle_level_irq);
+
+ return 0;
+}
+
+static const struct irq_domain_ops arc_intc_domain_ops = {
+ .xlate = irq_domain_xlate_onecell,
+ .map = arc_intc_domain_map,
+};
+
+static struct irq_domain *root_domain;
+
+static int __init
+init_onchip_IRQ(struct device_node *intc, struct device_node *parent)
+{
+ if (parent)
+ panic("DeviceTree incore intc not a root irq controller\n");
+
+ root_domain = irq_domain_add_legacy(intc, NR_CPU_IRQS, 0, 0,
+ &arc_intc_domain_ops, NULL);
+
+ if (!root_domain)
+ panic("root irq domain not avail\n");
+
+ /* with this we don't need to export root_domain */
+ irq_set_default_host(root_domain);
+
+ return 0;
+}
+
+IRQCHIP_DECLARE(arc_intc, "snps,arc700-intc", init_onchip_IRQ);
+
+/*
+ * arch_local_irq_enable - Enable interrupts.
+ *
+ * 1. Explicitly called to re-enable interrupts
+ * 2. Implicitly called from spin_unlock_irq, write_unlock_irq etc
+ * which maybe in hard ISR itself
+ *
+ * Semantics of this function change depending on where it is called from:
+ *
+ * -If called from hard-ISR, it must not invert interrupt priorities
+ * e.g. suppose TIMER is high priority (Level 2) IRQ
+ * Time hard-ISR, timer_interrupt( ) calls spin_unlock_irq several times.
+ * Here local_irq_enable( ) shd not re-enable lower priority interrupts
+ * -If called from soft-ISR, it must re-enable all interrupts
+ * soft ISR are low prioity jobs which can be very slow, thus all IRQs
+ * must be enabled while they run.
+ * Now hardware context wise we may still be in L2 ISR (not done rtie)
+ * still we must re-enable both L1 and L2 IRQs
+ * Another twist is prev scenario with flow being
+ * L1 ISR ==> interrupted by L2 ISR ==> L2 soft ISR
+ * here we must not re-enable Ll as prev Ll Interrupt's h/w context will get
+ * over-written (this is deficiency in ARC700 Interrupt mechanism)
+ */
+
+#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS /* Complex version for 2 IRQ levels */
+
+void arch_local_irq_enable(void)
+{
+
+ unsigned long flags = arch_local_save_flags();
+
+ /* Allow both L1 and L2 at the onset */
+ flags |= (STATUS_E1_MASK | STATUS_E2_MASK);
+
+ /* Called from hard ISR (between irq_enter and irq_exit) */
+ if (in_irq()) {
+
+ /* If in L2 ISR, don't re-enable any further IRQs as this can
+ * cause IRQ priorities to get upside down. e.g. it could allow
+ * L1 be taken while in L2 hard ISR which is wrong not only in
+ * theory, it can also cause the dreaded L1-L2-L1 scenario
+ */
+ if (flags & STATUS_A2_MASK)
+ flags &= ~(STATUS_E1_MASK | STATUS_E2_MASK);
+
+ /* Even if in L1 ISR, allowe Higher prio L2 IRQs */
+ else if (flags & STATUS_A1_MASK)
+ flags &= ~(STATUS_E1_MASK);
+ }
+
+ /* called from soft IRQ, ideally we want to re-enable all levels */
+
+ else if (in_softirq()) {
+
+ /* However if this is case of L1 interrupted by L2,
+ * re-enabling both may cause whaco L1-L2-L1 scenario
+ * because ARC700 allows level 1 to interrupt an active L2 ISR
+ * Thus we disable both
+ * However some code, executing in soft ISR wants some IRQs
+ * to be enabled so we re-enable L2 only
+ *
+ * How do we determine L1 intr by L2
+ * -A2 is set (means in L2 ISR)
+ * -E1 is set in this ISR's pt_regs->status32 which is
+ * saved copy of status32_l2 when l2 ISR happened
+ */
+ struct pt_regs *pt = get_irq_regs();
+
+ if ((flags & STATUS_A2_MASK) && pt &&
+ (pt->status32 & STATUS_A1_MASK)) {
+ /*flags &= ~(STATUS_E1_MASK | STATUS_E2_MASK); */
+ flags &= ~(STATUS_E1_MASK);
+ }
+ }
+
+ arch_local_irq_restore(flags);
+}
+
+#else /* ! CONFIG_ARC_COMPACT_IRQ_LEVELS */
+
+/*
+ * Simpler version for only 1 level of interrupt
+ * Here we only Worry about Level 1 Bits
+ */
+void arch_local_irq_enable(void)
+{
+ unsigned long flags;
+
+ /*
+ * ARC IDE Drivers tries to re-enable interrupts from hard-isr
+ * context which is simply wrong
+ */
+ if (in_irq()) {
+ WARN_ONCE(1, "IRQ enabled from hard-isr");
+ return;
+ }
+
+ flags = arch_local_save_flags();
+ flags |= (STATUS_E1_MASK | STATUS_E2_MASK);
+ arch_local_irq_restore(flags);
+}
+#endif
+EXPORT_SYMBOL(arch_local_irq_enable);
diff --git a/arch/arc/kernel/irq.c b/arch/arc/kernel/irq.c
index 620ec2f..2989a7b 100644
--- a/arch/arc/kernel/irq.c
+++ b/arch/arc/kernel/irq.c
@@ -8,116 +8,10 @@
*/
#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/irqdomain.h>
#include <linux/irqchip.h>
-#include "../../drivers/irqchip/irqchip.h"
-#include <asm/sections.h>
-#include <asm/irq.h>
#include <asm/mach_desc.h>
/*
- * Early Hardware specific Interrupt setup
- * -Platform independent, needed for each CPU (not foldable into init_IRQ)
- * -Called very early (start_kernel -> setup_arch -> setup_processor)
- *
- * what it does ?
- * -Optionally, setup the High priority Interrupts as Level 2 IRQs
- */
-void arc_init_IRQ(void)
-{
- int level_mask = 0;
-
- /* setup any high priority Interrupts (Level2 in ARCompact jargon) */
- level_mask |= IS_ENABLED(CONFIG_ARC_IRQ3_LV2) << 3;
- level_mask |= IS_ENABLED(CONFIG_ARC_IRQ5_LV2) << 5;
- level_mask |= IS_ENABLED(CONFIG_ARC_IRQ6_LV2) << 6;
-
- /*
- * Write to register, even if no LV2 IRQs configured to reset it
- * in case bootloader had mucked with it
- */
- write_aux_reg(AUX_IRQ_LEV, level_mask);
-
- if (level_mask)
- pr_info("Level-2 interrupts bitset %x\n", level_mask);
-}
-
-/*
- * ARC700 core includes a simple on-chip intc supporting
- * -per IRQ enable/disable
- * -2 levels of interrupts (high/low)
- * -all interrupts being level triggered
- *
- * To reduce platform code, we assume all IRQs directly hooked-up into intc.
- * Platforms with external intc, hence cascaded IRQs, are free to over-ride
- * below, per IRQ.
- */
-
-static void arc_irq_mask(struct irq_data *data)
-{
- unsigned int ienb;
-
- ienb = read_aux_reg(AUX_IENABLE);
- ienb &= ~(1 << data->irq);
- write_aux_reg(AUX_IENABLE, ienb);
-}
-
-static void arc_irq_unmask(struct irq_data *data)
-{
- unsigned int ienb;
-
- ienb = read_aux_reg(AUX_IENABLE);
- ienb |= (1 << data->irq);
- write_aux_reg(AUX_IENABLE, ienb);
-}
-
-static struct irq_chip onchip_intc = {
- .name = "ARC In-core Intc",
- .irq_mask = arc_irq_mask,
- .irq_unmask = arc_irq_unmask,
-};
-
-static int arc_intc_domain_map(struct irq_domain *d, unsigned int irq,
- irq_hw_number_t hw)
-{
- if (irq == TIMER0_IRQ)
- irq_set_chip_and_handler(irq, &onchip_intc, handle_percpu_irq);
- else
- irq_set_chip_and_handler(irq, &onchip_intc, handle_level_irq);
-
- return 0;
-}
-
-static const struct irq_domain_ops arc_intc_domain_ops = {
- .xlate = irq_domain_xlate_onecell,
- .map = arc_intc_domain_map,
-};
-
-static struct irq_domain *root_domain;
-
-static int __init
-init_onchip_IRQ(struct device_node *intc, struct device_node *parent)
-{
- if (parent)
- panic("DeviceTree incore intc not a root irq controller\n");
-
- root_domain = irq_domain_add_legacy(intc, NR_CPU_IRQS, 0, 0,
- &arc_intc_domain_ops, NULL);
-
- if (!root_domain)
- panic("root irq domain not avail\n");
-
- /* with this we don't need to export root_domain */
- irq_set_default_host(root_domain);
-
- return 0;
-}
-
-IRQCHIP_DECLARE(arc_intc, "snps,arc700-intc", init_onchip_IRQ);
-
-/*
* Late Interrupt system init called from start_kernel for Boot CPU only
*
* Since slab must already be initialized, platforms can start doing any
@@ -178,107 +72,3 @@
enable_percpu_irq(irq, 0);
}
-
-/*
- * arch_local_irq_enable - Enable interrupts.
- *
- * 1. Explicitly called to re-enable interrupts
- * 2. Implicitly called from spin_unlock_irq, write_unlock_irq etc
- * which maybe in hard ISR itself
- *
- * Semantics of this function change depending on where it is called from:
- *
- * -If called from hard-ISR, it must not invert interrupt priorities
- * e.g. suppose TIMER is high priority (Level 2) IRQ
- * Time hard-ISR, timer_interrupt( ) calls spin_unlock_irq several times.
- * Here local_irq_enable( ) shd not re-enable lower priority interrupts
- * -If called from soft-ISR, it must re-enable all interrupts
- * soft ISR are low prioity jobs which can be very slow, thus all IRQs
- * must be enabled while they run.
- * Now hardware context wise we may still be in L2 ISR (not done rtie)
- * still we must re-enable both L1 and L2 IRQs
- * Another twist is prev scenario with flow being
- * L1 ISR ==> interrupted by L2 ISR ==> L2 soft ISR
- * here we must not re-enable Ll as prev Ll Interrupt's h/w context will get
- * over-written (this is deficiency in ARC700 Interrupt mechanism)
- */
-
-#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS /* Complex version for 2 IRQ levels */
-
-void arch_local_irq_enable(void)
-{
-
- unsigned long flags;
- flags = arch_local_save_flags();
-
- /* Allow both L1 and L2 at the onset */
- flags |= (STATUS_E1_MASK | STATUS_E2_MASK);
-
- /* Called from hard ISR (between irq_enter and irq_exit) */
- if (in_irq()) {
-
- /* If in L2 ISR, don't re-enable any further IRQs as this can
- * cause IRQ priorities to get upside down. e.g. it could allow
- * L1 be taken while in L2 hard ISR which is wrong not only in
- * theory, it can also cause the dreaded L1-L2-L1 scenario
- */
- if (flags & STATUS_A2_MASK)
- flags &= ~(STATUS_E1_MASK | STATUS_E2_MASK);
-
- /* Even if in L1 ISR, allowe Higher prio L2 IRQs */
- else if (flags & STATUS_A1_MASK)
- flags &= ~(STATUS_E1_MASK);
- }
-
- /* called from soft IRQ, ideally we want to re-enable all levels */
-
- else if (in_softirq()) {
-
- /* However if this is case of L1 interrupted by L2,
- * re-enabling both may cause whaco L1-L2-L1 scenario
- * because ARC700 allows level 1 to interrupt an active L2 ISR
- * Thus we disable both
- * However some code, executing in soft ISR wants some IRQs
- * to be enabled so we re-enable L2 only
- *
- * How do we determine L1 intr by L2
- * -A2 is set (means in L2 ISR)
- * -E1 is set in this ISR's pt_regs->status32 which is
- * saved copy of status32_l2 when l2 ISR happened
- */
- struct pt_regs *pt = get_irq_regs();
- if ((flags & STATUS_A2_MASK) && pt &&
- (pt->status32 & STATUS_A1_MASK)) {
- /*flags &= ~(STATUS_E1_MASK | STATUS_E2_MASK); */
- flags &= ~(STATUS_E1_MASK);
- }
- }
-
- arch_local_irq_restore(flags);
-}
-
-#else /* ! CONFIG_ARC_COMPACT_IRQ_LEVELS */
-
-/*
- * Simpler version for only 1 level of interrupt
- * Here we only Worry about Level 1 Bits
- */
-void arch_local_irq_enable(void)
-{
- unsigned long flags;
-
- /*
- * ARC IDE Drivers tries to re-enable interrupts from hard-isr
- * context which is simply wrong
- */
- if (in_irq()) {
- WARN_ONCE(1, "IRQ enabled from hard-isr");
- return;
- }
-
- flags = arch_local_save_flags();
- flags |= (STATUS_E1_MASK | STATUS_E2_MASK);
- arch_local_irq_restore(flags);
-}
-#endif
-EXPORT_SYMBOL(arch_local_irq_enable);
diff --git a/arch/arc/kernel/mcip.c b/arch/arc/kernel/mcip.c
new file mode 100644
index 0000000..30284e8
--- /dev/null
+++ b/arch/arc/kernel/mcip.c
@@ -0,0 +1,341 @@
+/*
+ * ARC ARConnect (MultiCore IP) support (formerly known as MCIP)
+ *
+ * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/smp.h>
+#include <linux/irq.h>
+#include <linux/spinlock.h>
+#include <asm/mcip.h>
+
+static char smp_cpuinfo_buf[128];
+static int idu_detected;
+
+static DEFINE_RAW_SPINLOCK(mcip_lock);
+
+/*
+ * Any SMP specific init any CPU does when it comes up.
+ * Here we setup the CPU to enable Inter-Processor-Interrupts
+ * Called for each CPU
+ * -Master : init_IRQ()
+ * -Other(s) : start_kernel_secondary()
+ */
+void mcip_init_smp(unsigned int cpu)
+{
+ smp_ipi_irq_setup(cpu, IPI_IRQ);
+}
+
+static void mcip_ipi_send(int cpu)
+{
+ unsigned long flags;
+ int ipi_was_pending;
+
+ /*
+ * NOTE: We must spin here if the other cpu hasn't yet
+ * serviced a previous message. This can burn lots
+ * of time, but we MUST follows this protocol or
+ * ipi messages can be lost!!!
+ * Also, we must release the lock in this loop because
+ * the other side may get to this same loop and not
+ * be able to ack -- thus causing deadlock.
+ */
+
+ do {
+ raw_spin_lock_irqsave(&mcip_lock, flags);
+ __mcip_cmd(CMD_INTRPT_READ_STATUS, cpu);
+ ipi_was_pending = read_aux_reg(ARC_REG_MCIP_READBACK);
+ if (ipi_was_pending == 0)
+ break; /* break out but keep lock */
+ raw_spin_unlock_irqrestore(&mcip_lock, flags);
+ } while (1);
+
+ __mcip_cmd(CMD_INTRPT_GENERATE_IRQ, cpu);
+ raw_spin_unlock_irqrestore(&mcip_lock, flags);
+
+#ifdef CONFIG_ARC_IPI_DBG
+ if (ipi_was_pending)
+ pr_info("IPI ACK delayed from cpu %d\n", cpu);
+#endif
+}
+
+static void mcip_ipi_clear(int irq)
+{
+ unsigned int cpu, c;
+ unsigned long flags;
+ unsigned int __maybe_unused copy;
+
+ raw_spin_lock_irqsave(&mcip_lock, flags);
+
+ /* Who sent the IPI */
+ __mcip_cmd(CMD_INTRPT_CHECK_SOURCE, 0);
+
+ copy = cpu = read_aux_reg(ARC_REG_MCIP_READBACK); /* 1,2,4,8... */
+
+ /*
+ * In rare case, multiple concurrent IPIs sent to same target can
+ * possibly be coalesced by MCIP into 1 asserted IRQ, so @cpus can be
+ * "vectored" (multiple bits sets) as opposed to typical single bit
+ */
+ do {
+ c = __ffs(cpu); /* 0,1,2,3 */
+ __mcip_cmd(CMD_INTRPT_GENERATE_ACK, c);
+ cpu &= ~(1U << c);
+ } while (cpu);
+
+ raw_spin_unlock_irqrestore(&mcip_lock, flags);
+
+#ifdef CONFIG_ARC_IPI_DBG
+ if (c != __ffs(copy))
+ pr_info("IPIs from %x coalesced to %x\n",
+ copy, raw_smp_processor_id());
+#endif
+}
+
+volatile int wake_flag;
+
+static void mcip_wakeup_cpu(int cpu, unsigned long pc)
+{
+ BUG_ON(cpu == 0);
+ wake_flag = cpu;
+}
+
+void arc_platform_smp_wait_to_boot(int cpu)
+{
+ while (wake_flag != cpu)
+ ;
+
+ wake_flag = 0;
+ __asm__ __volatile__("j @first_lines_of_secondary \n");
+}
+
+struct plat_smp_ops plat_smp_ops = {
+ .info = smp_cpuinfo_buf,
+ .cpu_kick = mcip_wakeup_cpu,
+ .ipi_send = mcip_ipi_send,
+ .ipi_clear = mcip_ipi_clear,
+};
+
+void mcip_init_early_smp(void)
+{
+#define IS_AVAIL1(var, str) ((var) ? str : "")
+
+ struct mcip_bcr {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad3:8,
+ idu:1, llm:1, num_cores:6,
+ iocoh:1, grtc:1, dbg:1, pad2:1,
+ msg:1, sem:1, ipi:1, pad:1,
+ ver:8;
+#else
+ unsigned int ver:8,
+ pad:1, ipi:1, sem:1, msg:1,
+ pad2:1, dbg:1, grtc:1, iocoh:1,
+ num_cores:6, llm:1, idu:1,
+ pad3:8;
+#endif
+ } mp;
+
+ READ_BCR(ARC_REG_MCIP_BCR, mp);
+
+ sprintf(smp_cpuinfo_buf,
+ "Extn [SMP]\t: ARConnect (v%d): %d cores with %s%s%s%s\n",
+ mp.ver, mp.num_cores,
+ IS_AVAIL1(mp.ipi, "IPI "),
+ IS_AVAIL1(mp.idu, "IDU "),
+ IS_AVAIL1(mp.dbg, "DEBUG "),
+ IS_AVAIL1(mp.grtc, "GRTC"));
+
+ idu_detected = mp.idu;
+
+ if (mp.dbg) {
+ __mcip_cmd_data(CMD_DEBUG_SET_SELECT, 0, 0xf);
+ __mcip_cmd_data(CMD_DEBUG_SET_MASK, 0xf, 0xf);
+ }
+
+ if (IS_ENABLED(CONFIG_ARC_HAS_GRTC) && !mp.grtc)
+ panic("kernel trying to use non-existent GRTC\n");
+}
+
+/***************************************************************************
+ * ARCv2 Interrupt Distribution Unit (IDU)
+ *
+ * Connects external "COMMON" IRQs to core intc, providing:
+ * -dynamic routing (IRQ affinity)
+ * -load balancing (Round Robin interrupt distribution)
+ * -1:N distribution
+ *
+ * It physically resides in the MCIP hw block
+ */
+
+#include <linux/irqchip.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include "../../drivers/irqchip/irqchip.h"
+
+/*
+ * Set the DEST for @cmn_irq to @cpu_mask (1 bit per core)
+ */
+static void idu_set_dest(unsigned int cmn_irq, unsigned int cpu_mask)
+{
+ __mcip_cmd_data(CMD_IDU_SET_DEST, cmn_irq, cpu_mask);
+}
+
+static void idu_set_mode(unsigned int cmn_irq, unsigned int lvl,
+ unsigned int distr)
+{
+ union {
+ unsigned int word;
+ struct {
+ unsigned int distr:2, pad:2, lvl:1, pad2:27;
+ };
+ } data;
+
+ data.distr = distr;
+ data.lvl = lvl;
+ __mcip_cmd_data(CMD_IDU_SET_MODE, cmn_irq, data.word);
+}
+
+static void idu_irq_mask(struct irq_data *data)
+{
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&mcip_lock, flags);
+ __mcip_cmd_data(CMD_IDU_SET_MASK, data->hwirq, 1);
+ raw_spin_unlock_irqrestore(&mcip_lock, flags);
+}
+
+static void idu_irq_unmask(struct irq_data *data)
+{
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&mcip_lock, flags);
+ __mcip_cmd_data(CMD_IDU_SET_MASK, data->hwirq, 0);
+ raw_spin_unlock_irqrestore(&mcip_lock, flags);
+}
+
+static int
+idu_irq_set_affinity(struct irq_data *d, const struct cpumask *cpumask, bool f)
+{
+ return IRQ_SET_MASK_OK;
+}
+
+static struct irq_chip idu_irq_chip = {
+ .name = "MCIP IDU Intc",
+ .irq_mask = idu_irq_mask,
+ .irq_unmask = idu_irq_unmask,
+#ifdef CONFIG_SMP
+ .irq_set_affinity = idu_irq_set_affinity,
+#endif
+
+};
+
+static int idu_first_irq;
+
+static void idu_cascade_isr(unsigned int core_irq, struct irq_desc *desc)
+{
+ struct irq_domain *domain = irq_desc_get_handler_data(desc);
+ unsigned int idu_irq;
+
+ idu_irq = core_irq - idu_first_irq;
+ generic_handle_irq(irq_find_mapping(domain, idu_irq));
+}
+
+static int idu_irq_map(struct irq_domain *d, unsigned int virq, irq_hw_number_t hwirq)
+{
+ irq_set_chip_and_handler(virq, &idu_irq_chip, handle_level_irq);
+ irq_set_status_flags(virq, IRQ_MOVE_PCNTXT);
+
+ return 0;
+}
+
+static int idu_irq_xlate(struct irq_domain *d, struct device_node *n,
+ const u32 *intspec, unsigned int intsize,
+ irq_hw_number_t *out_hwirq, unsigned int *out_type)
+{
+ irq_hw_number_t hwirq = *out_hwirq = intspec[0];
+ int distri = intspec[1];
+ unsigned long flags;
+
+ *out_type = IRQ_TYPE_NONE;
+
+ /* XXX: validate distribution scheme again online cpu mask */
+ if (distri == 0) {
+ /* 0 - Round Robin to all cpus, otherwise 1 bit per core */
+ raw_spin_lock_irqsave(&mcip_lock, flags);
+ idu_set_dest(hwirq, BIT(num_online_cpus()) - 1);
+ idu_set_mode(hwirq, IDU_M_TRIG_LEVEL, IDU_M_DISTRI_RR);
+ raw_spin_unlock_irqrestore(&mcip_lock, flags);
+ } else {
+ /*
+ * DEST based distribution for Level Triggered intr can only
+ * have 1 CPU, so generalize it to always contain 1 cpu
+ */
+ int cpu = ffs(distri);
+
+ if (cpu != fls(distri))
+ pr_warn("IDU irq %lx distri mode set to cpu %x\n",
+ hwirq, cpu);
+
+ raw_spin_lock_irqsave(&mcip_lock, flags);
+ idu_set_dest(hwirq, cpu);
+ idu_set_mode(hwirq, IDU_M_TRIG_LEVEL, IDU_M_DISTRI_DEST);
+ raw_spin_unlock_irqrestore(&mcip_lock, flags);
+ }
+
+ return 0;
+}
+
+static const struct irq_domain_ops idu_irq_ops = {
+ .xlate = idu_irq_xlate,
+ .map = idu_irq_map,
+};
+
+/*
+ * [16, 23]: Statically assigned always private-per-core (Timers, WDT, IPI)
+ * [24, 23+C]: If C > 0 then "C" common IRQs
+ * [24+C, N]: Not statically assigned, private-per-core
+ */
+
+
+static int __init
+idu_of_init(struct device_node *intc, struct device_node *parent)
+{
+ struct irq_domain *domain;
+ /* Read IDU BCR to confirm nr_irqs */
+ int nr_irqs = of_irq_count(intc);
+ int i, irq;
+
+ if (!idu_detected)
+ panic("IDU not detected, but DeviceTree using it");
+
+ pr_info("MCIP: IDU referenced from Devicetree %d irqs\n", nr_irqs);
+
+ domain = irq_domain_add_linear(intc, nr_irqs, &idu_irq_ops, NULL);
+
+ /* Parent interrupts (core-intc) are already mapped */
+
+ for (i = 0; i < nr_irqs; i++) {
+ /*
+ * Return parent uplink IRQs (towards core intc) 24,25,.....
+ * this step has been done before already
+ * however we need it to get the parent virq and set IDU handler
+ * as first level isr
+ */
+ irq = irq_of_parse_and_map(intc, i);
+ if (!i)
+ idu_first_irq = irq;
+
+ irq_set_handler_data(irq, domain);
+ irq_set_chained_handler(irq, idu_cascade_isr);
+ }
+
+ __mcip_cmd(CMD_IDU_ENABLE, 0);
+
+ return 0;
+}
+IRQCHIP_DECLARE(arcv2_idu_intc, "snps,archs-idu-intc", idu_of_init);
diff --git a/arch/arc/kernel/perf_event.c b/arch/arc/kernel/perf_event.c
index fd2ec50..1287388 100644
--- a/arch/arc/kernel/perf_event.c
+++ b/arch/arc/kernel/perf_event.c
@@ -266,10 +266,9 @@
static int arc_pmu_device_probe(struct platform_device *pdev)
{
- struct arc_pmu *arc_pmu;
struct arc_reg_pct_build pct_bcr;
struct arc_reg_cc_build cc_bcr;
- int i, j, ret;
+ int i, j;
union cc_name {
struct {
@@ -336,9 +335,7 @@
/* ARC 700 PMU does not support sampling events */
arc_pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
- ret = perf_pmu_register(&arc_pmu->pmu, pdev->name, PERF_TYPE_RAW);
-
- return ret;
+ return perf_pmu_register(&arc_pmu->pmu, pdev->name, PERF_TYPE_RAW);
}
#ifdef CONFIG_OF
diff --git a/arch/arc/kernel/process.c b/arch/arc/kernel/process.c
index e095c55..4409245 100644
--- a/arch/arc/kernel/process.c
+++ b/arch/arc/kernel/process.c
@@ -44,7 +44,11 @@
void arch_cpu_idle(void)
{
/* sleep, but enable all interrupts before committing */
- __asm__("sleep 0x3");
+ if (is_isa_arcompact()) {
+ __asm__("sleep 0x3");
+ } else {
+ __asm__("sleep 0x10");
+ }
}
asmlinkage void ret_from_fork(void);
@@ -166,8 +170,7 @@
* [L] ZOL loop inhibited to begin with - cleared by a LP insn
* Interrupts enabled
*/
- regs->status32 = STATUS_U_MASK | STATUS_L_MASK |
- STATUS_E1_MASK | STATUS_E2_MASK;
+ regs->status32 = STATUS_U_MASK | STATUS_L_MASK | ISA_INIT_STATUS_BITS;
/* bogus seed values for debugging */
regs->lp_start = 0x10;
@@ -197,8 +200,11 @@
{
unsigned int eflags;
- if (x->e_machine != EM_ARCOMPACT)
+ if (x->e_machine != EM_ARC_INUSE) {
+ pr_err("ELF not built for %s ISA\n",
+ is_isa_arcompact() ? "ARCompact":"ARCv2");
return 0;
+ }
eflags = x->e_flags;
if ((eflags & EF_ARC_OSABI_MSK) < EF_ARC_OSABI_CURRENT) {
diff --git a/arch/arc/kernel/ptrace.c b/arch/arc/kernel/ptrace.c
index 13b3ffb..4442204 100644
--- a/arch/arc/kernel/ptrace.c
+++ b/arch/arc/kernel/ptrace.c
@@ -47,10 +47,47 @@
offsetof(struct user_regs_struct, LOC) + 4);
REG_O_ZERO(pad);
- REG_O_CHUNK(scratch, callee, ptregs);
+ REG_O_ONE(scratch.bta, &ptregs->bta);
+ REG_O_ONE(scratch.lp_start, &ptregs->lp_start);
+ REG_O_ONE(scratch.lp_end, &ptregs->lp_end);
+ REG_O_ONE(scratch.lp_count, &ptregs->lp_count);
+ REG_O_ONE(scratch.status32, &ptregs->status32);
+ REG_O_ONE(scratch.ret, &ptregs->ret);
+ REG_O_ONE(scratch.blink, &ptregs->blink);
+ REG_O_ONE(scratch.fp, &ptregs->fp);
+ REG_O_ONE(scratch.gp, &ptregs->r26);
+ REG_O_ONE(scratch.r12, &ptregs->r12);
+ REG_O_ONE(scratch.r11, &ptregs->r11);
+ REG_O_ONE(scratch.r10, &ptregs->r10);
+ REG_O_ONE(scratch.r9, &ptregs->r9);
+ REG_O_ONE(scratch.r8, &ptregs->r8);
+ REG_O_ONE(scratch.r7, &ptregs->r7);
+ REG_O_ONE(scratch.r6, &ptregs->r6);
+ REG_O_ONE(scratch.r5, &ptregs->r5);
+ REG_O_ONE(scratch.r4, &ptregs->r4);
+ REG_O_ONE(scratch.r3, &ptregs->r3);
+ REG_O_ONE(scratch.r2, &ptregs->r2);
+ REG_O_ONE(scratch.r1, &ptregs->r1);
+ REG_O_ONE(scratch.r0, &ptregs->r0);
+ REG_O_ONE(scratch.sp, &ptregs->sp);
+
REG_O_ZERO(pad2);
- REG_O_CHUNK(callee, efa, cregs);
- REG_O_CHUNK(efa, stop_pc, &target->thread.fault_address);
+
+ REG_O_ONE(callee.r25, &cregs->r25);
+ REG_O_ONE(callee.r24, &cregs->r24);
+ REG_O_ONE(callee.r23, &cregs->r23);
+ REG_O_ONE(callee.r22, &cregs->r22);
+ REG_O_ONE(callee.r21, &cregs->r21);
+ REG_O_ONE(callee.r20, &cregs->r20);
+ REG_O_ONE(callee.r19, &cregs->r19);
+ REG_O_ONE(callee.r18, &cregs->r18);
+ REG_O_ONE(callee.r17, &cregs->r17);
+ REG_O_ONE(callee.r16, &cregs->r16);
+ REG_O_ONE(callee.r15, &cregs->r15);
+ REG_O_ONE(callee.r14, &cregs->r14);
+ REG_O_ONE(callee.r13, &cregs->r13);
+
+ REG_O_ONE(efa, &target->thread.fault_address);
if (!ret) {
if (in_brkpt_trap(ptregs)) {
@@ -97,12 +134,51 @@
offsetof(struct user_regs_struct, LOC) + 4);
REG_IGNORE_ONE(pad);
- /* TBD: disallow updates to STATUS32 etc*/
- REG_IN_CHUNK(scratch, pad2, ptregs); /* pt_regs[bta..sp] */
+
+ REG_IN_ONE(scratch.bta, &ptregs->bta);
+ REG_IN_ONE(scratch.lp_start, &ptregs->lp_start);
+ REG_IN_ONE(scratch.lp_end, &ptregs->lp_end);
+ REG_IN_ONE(scratch.lp_count, &ptregs->lp_count);
+
+ REG_IGNORE_ONE(scratch.status32);
+
+ REG_IN_ONE(scratch.ret, &ptregs->ret);
+ REG_IN_ONE(scratch.blink, &ptregs->blink);
+ REG_IN_ONE(scratch.fp, &ptregs->fp);
+ REG_IN_ONE(scratch.gp, &ptregs->r26);
+ REG_IN_ONE(scratch.r12, &ptregs->r12);
+ REG_IN_ONE(scratch.r11, &ptregs->r11);
+ REG_IN_ONE(scratch.r10, &ptregs->r10);
+ REG_IN_ONE(scratch.r9, &ptregs->r9);
+ REG_IN_ONE(scratch.r8, &ptregs->r8);
+ REG_IN_ONE(scratch.r7, &ptregs->r7);
+ REG_IN_ONE(scratch.r6, &ptregs->r6);
+ REG_IN_ONE(scratch.r5, &ptregs->r5);
+ REG_IN_ONE(scratch.r4, &ptregs->r4);
+ REG_IN_ONE(scratch.r3, &ptregs->r3);
+ REG_IN_ONE(scratch.r2, &ptregs->r2);
+ REG_IN_ONE(scratch.r1, &ptregs->r1);
+ REG_IN_ONE(scratch.r0, &ptregs->r0);
+ REG_IN_ONE(scratch.sp, &ptregs->sp);
+
REG_IGNORE_ONE(pad2);
- REG_IN_CHUNK(callee, efa, cregs); /* callee_regs[r25..r13] */
+
+ REG_IN_ONE(callee.r25, &cregs->r25);
+ REG_IN_ONE(callee.r24, &cregs->r24);
+ REG_IN_ONE(callee.r23, &cregs->r23);
+ REG_IN_ONE(callee.r22, &cregs->r22);
+ REG_IN_ONE(callee.r21, &cregs->r21);
+ REG_IN_ONE(callee.r20, &cregs->r20);
+ REG_IN_ONE(callee.r19, &cregs->r19);
+ REG_IN_ONE(callee.r18, &cregs->r18);
+ REG_IN_ONE(callee.r17, &cregs->r17);
+ REG_IN_ONE(callee.r16, &cregs->r16);
+ REG_IN_ONE(callee.r15, &cregs->r15);
+ REG_IN_ONE(callee.r14, &cregs->r14);
+ REG_IN_ONE(callee.r13, &cregs->r13);
+
REG_IGNORE_ONE(efa); /* efa update invalid */
- REG_IGNORE_ONE(stop_pc); /* PC updated via @ret */
+ REG_IGNORE_ONE(stop_pc); /* PC updated via @ret */
return ret;
}
@@ -124,7 +200,7 @@
static const struct user_regset_view user_arc_view = {
.name = UTS_MACHINE,
- .e_machine = EM_ARCOMPACT,
+ .e_machine = EM_ARC_INUSE,
.regsets = arc_regsets,
.n = ARRAY_SIZE(arc_regsets)
};
diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
index 1d167c6..a3d1862 100644
--- a/arch/arc/kernel/setup.c
+++ b/arch/arc/kernel/setup.c
@@ -30,6 +30,8 @@
#define FIX_PTR(x) __asm__ __volatile__(";" : "+r"(x))
+unsigned int intr_to_DE_cnt;
+
/* Part of U-boot ABI: see head.S */
int __initdata uboot_tag;
char __initdata *uboot_arg;
@@ -54,7 +56,7 @@
cpu->vec_base = read_aux_reg(AUX_INTR_VEC_BASE);
READ_BCR(ARC_REG_D_UNCACH_BCR, uncached_space);
- cpu->uncached_base = uncached_space.start << 24;
+ BUG_ON((uncached_space.start << 24) != ARC_UNCACHED_ADDR_SPACE);
READ_BCR(ARC_REG_MUL_BCR, cpu->extn_mpy);
@@ -96,7 +98,7 @@
read_decode_mmu_bcr();
read_decode_cache_bcr();
- {
+ if (is_isa_arcompact()) {
struct bcr_fp_arcompact sp, dp;
struct bcr_bpu_arcompact bpu;
@@ -112,6 +114,19 @@
cpu->bpu.num_cache = 256 << (bpu.ent - 1);
cpu->bpu.num_pred = 256 << (bpu.ent - 1);
}
+ } else {
+ struct bcr_fp_arcv2 spdp;
+ struct bcr_bpu_arcv2 bpu;
+
+ READ_BCR(ARC_REG_FP_V2_BCR, spdp);
+ cpu->extn.fpu_sp = spdp.sp ? 1 : 0;
+ cpu->extn.fpu_dp = spdp.dp ? 1 : 0;
+
+ READ_BCR(ARC_REG_BPU_BCR, bpu);
+ cpu->bpu.ver = bpu.ver;
+ cpu->bpu.full = bpu.ft;
+ cpu->bpu.num_cache = 256 << bpu.bce;
+ cpu->bpu.num_pred = 2048 << bpu.pte;
}
READ_BCR(ARC_REG_AP_BCR, bcr);
@@ -131,6 +146,7 @@
{ {0x30, "ARC 700" }, 0x33},
{ {0x34, "ARC 700 R4.10"}, 0x34},
{ {0x35, "ARC 700 R4.11"}, 0x35},
+ { {0x50, "ARC HS38" }, 0x51},
{ {0x00, NULL } }
};
@@ -149,13 +165,17 @@
FIX_PTR(cpu);
- {
+ if (is_isa_arcompact()) {
isa_nm = "ARCompact";
be = IS_ENABLED(CONFIG_CPU_BIG_ENDIAN);
atomic = cpu->isa.atomic1;
if (!cpu->isa.ver) /* ISA BCR absent, use Kconfig info */
atomic = IS_ENABLED(CONFIG_ARC_HAS_LLSC);
+ } else {
+ isa_nm = "ARCv2";
+ be = cpu->isa.be;
+ atomic = cpu->isa.atomic;
}
n += scnprintf(buf + n, len - n,
@@ -183,16 +203,34 @@
n += scnprintf(buf + n, len - n, "Timers\t\t: %s%s%s%s\nISA Extn\t: ",
IS_AVAIL1(cpu->timers.t0, "Timer0 "),
IS_AVAIL1(cpu->timers.t1, "Timer1 "),
- IS_AVAIL2(cpu->timers.rtsc, "64-bit RTSC ", CONFIG_ARC_HAS_RTSC));
+ IS_AVAIL2(cpu->timers.rtc, "64-bit RTC ",
+ CONFIG_ARC_HAS_RTC));
- n += i = scnprintf(buf + n, len - n, "%s%s",
- IS_AVAIL2(atomic, "atomic ", CONFIG_ARC_HAS_LLSC));
+ n += i = scnprintf(buf + n, len - n, "%s%s%s%s%s",
+ IS_AVAIL2(atomic, "atomic ", CONFIG_ARC_HAS_LLSC),
+ IS_AVAIL2(cpu->isa.ldd, "ll64 ", CONFIG_ARC_HAS_LL64),
+ IS_AVAIL1(cpu->isa.unalign, "unalign (not used)"));
if (i)
n += scnprintf(buf + n, len - n, "\n\t\t: ");
+ if (cpu->extn_mpy.ver) {
+ if (cpu->extn_mpy.ver <= 0x2) { /* ARCompact */
+ n += scnprintf(buf + n, len - n, "mpy ");
+ } else {
+ int opt = 2; /* stock MPY/MPYH */
+
+ if (cpu->extn_mpy.dsp) /* OPT 7-9 */
+ opt = cpu->extn_mpy.dsp + 6;
+
+ n += scnprintf(buf + n, len - n, "mpy[opt %d] ", opt);
+ }
+ n += scnprintf(buf + n, len - n, "%s",
+ IS_USED(CONFIG_ARC_HAS_HW_MPY));
+ }
+
n += scnprintf(buf + n, len - n, "%s%s%s%s%s%s%s%s\n",
- IS_AVAIL1(cpu->extn_mpy.ver, "mpy "),
+ IS_AVAIL1(cpu->isa.div_rem, "div_rem "),
IS_AVAIL1(cpu->extn.norm, "norm "),
IS_AVAIL1(cpu->extn.barrel, "barrel-shift "),
IS_AVAIL1(cpu->extn.swap, "swap "),
@@ -219,7 +257,7 @@
n += scnprintf(buf + n, len - n,
"Vector Table\t: %#x\nUncached Base\t: %#x\n",
- cpu->vec_base, cpu->uncached_base);
+ cpu->vec_base, ARC_UNCACHED_ADDR_SPACE);
if (cpu->extn.fpu_sp || cpu->extn.fpu_dp)
n += scnprintf(buf + n, len - n, "FPU\t\t: %s%s\n",
@@ -254,8 +292,8 @@
if (!cpu->timers.t1)
panic("Timer1 is not present!\n");
- if (IS_ENABLED(CONFIG_ARC_HAS_RTSC) && !cpu->timers.rtsc)
- panic("RTSC is not present\n");
+ if (IS_ENABLED(CONFIG_ARC_HAS_RTC) && !cpu->timers.rtc)
+ panic("RTC is not present\n");
#ifdef CONFIG_ARC_HAS_DCCM
/*
@@ -323,13 +361,16 @@
void __init setup_arch(char **cmdline_p)
{
+#ifdef CONFIG_ARC_UBOOT_SUPPORT
/* make sure that uboot passed pointer to cmdline/dtb is valid */
if (uboot_tag && is_kernel((unsigned long)uboot_arg))
panic("Invalid uboot arg\n");
/* See if u-boot passed an external Device Tree blob */
machine_desc = setup_machine_fdt(uboot_arg); /* uboot_tag == 2 */
- if (!machine_desc) {
+ if (!machine_desc)
+#endif
+ {
/* No, so try the embedded one */
machine_desc = setup_machine_fdt(__dtb_start);
if (!machine_desc)
diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c
index 2251fb4..004b7f0 100644
--- a/arch/arc/kernel/signal.c
+++ b/arch/arc/kernel/signal.c
@@ -67,7 +67,33 @@
sigset_t *set)
{
int err;
- err = __copy_to_user(&(sf->uc.uc_mcontext.regs.scratch), regs,
+ struct user_regs_struct uregs;
+
+ uregs.scratch.bta = regs->bta;
+ uregs.scratch.lp_start = regs->lp_start;
+ uregs.scratch.lp_end = regs->lp_end;
+ uregs.scratch.lp_count = regs->lp_count;
+ uregs.scratch.status32 = regs->status32;
+ uregs.scratch.ret = regs->ret;
+ uregs.scratch.blink = regs->blink;
+ uregs.scratch.fp = regs->fp;
+ uregs.scratch.gp = regs->r26;
+ uregs.scratch.r12 = regs->r12;
+ uregs.scratch.r11 = regs->r11;
+ uregs.scratch.r10 = regs->r10;
+ uregs.scratch.r9 = regs->r9;
+ uregs.scratch.r8 = regs->r8;
+ uregs.scratch.r7 = regs->r7;
+ uregs.scratch.r6 = regs->r6;
+ uregs.scratch.r5 = regs->r5;
+ uregs.scratch.r4 = regs->r4;
+ uregs.scratch.r3 = regs->r3;
+ uregs.scratch.r2 = regs->r2;
+ uregs.scratch.r1 = regs->r1;
+ uregs.scratch.r0 = regs->r0;
+ uregs.scratch.sp = regs->sp;
+
+ err = __copy_to_user(&(sf->uc.uc_mcontext.regs.scratch), &uregs.scratch,
sizeof(sf->uc.uc_mcontext.regs.scratch));
err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(sigset_t));
@@ -78,14 +104,40 @@
{
sigset_t set;
int err;
+ struct user_regs_struct uregs;
err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set));
if (!err)
set_current_blocked(&set);
- err |= __copy_from_user(regs, &(sf->uc.uc_mcontext.regs.scratch),
+ err |= __copy_from_user(&uregs.scratch,
+ &(sf->uc.uc_mcontext.regs.scratch),
sizeof(sf->uc.uc_mcontext.regs.scratch));
+ regs->bta = uregs.scratch.bta;
+ regs->lp_start = uregs.scratch.lp_start;
+ regs->lp_end = uregs.scratch.lp_end;
+ regs->lp_count = uregs.scratch.lp_count;
+ regs->status32 = uregs.scratch.status32;
+ regs->ret = uregs.scratch.ret;
+ regs->blink = uregs.scratch.blink;
+ regs->fp = uregs.scratch.fp;
+ regs->r26 = uregs.scratch.gp;
+ regs->r12 = uregs.scratch.r12;
+ regs->r11 = uregs.scratch.r11;
+ regs->r10 = uregs.scratch.r10;
+ regs->r9 = uregs.scratch.r9;
+ regs->r8 = uregs.scratch.r8;
+ regs->r7 = uregs.scratch.r7;
+ regs->r6 = uregs.scratch.r6;
+ regs->r5 = uregs.scratch.r5;
+ regs->r4 = uregs.scratch.r4;
+ regs->r3 = uregs.scratch.r3;
+ regs->r2 = uregs.scratch.r2;
+ regs->r1 = uregs.scratch.r1;
+ regs->r0 = uregs.scratch.r0;
+ regs->sp = uregs.scratch.sp;
+
return err;
}
@@ -284,7 +336,7 @@
* their orig user space value when we ret from kernel
*/
regs->r0 = regs->orig_r0;
- regs->ret -= 4;
+ regs->ret -= is_isa_arcv2() ? 2 : 4;
break;
}
}
@@ -325,10 +377,10 @@
if (regs->r0 == -ERESTARTNOHAND ||
regs->r0 == -ERESTARTSYS || regs->r0 == -ERESTARTNOINTR) {
regs->r0 = regs->orig_r0;
- regs->ret -= 4;
+ regs->ret -= is_isa_arcv2() ? 2 : 4;
} else if (regs->r0 == -ERESTART_RESTARTBLOCK) {
regs->r8 = __NR_restart_syscall;
- regs->ret -= 4;
+ regs->ret -= is_isa_arcv2() ? 2 : 4;
}
syscall_wont_restart(regs); /* No more restarts */
}
diff --git a/arch/arc/kernel/smp.c b/arch/arc/kernel/smp.c
index 6a400b1..be13d12 100644
--- a/arch/arc/kernel/smp.c
+++ b/arch/arc/kernel/smp.c
@@ -31,7 +31,7 @@
arch_spinlock_t smp_bitops_lock = __ARCH_SPIN_LOCK_UNLOCKED;
#endif
-struct plat_smp_ops plat_smp_ops;
+struct plat_smp_ops __weak plat_smp_ops;
/* XXX: per cpu ? Only needed once in early seconday boot */
struct task_struct *secondary_idle_tsk;
@@ -182,7 +182,7 @@
/*
* not supported here
*/
-int __init setup_profiling_timer(unsigned int multiplier)
+int setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}
@@ -278,8 +278,10 @@
machine_halt();
}
-static inline void __do_IPI(unsigned long msg)
+static inline int __do_IPI(unsigned long msg)
{
+ int rc = 0;
+
switch (msg) {
case IPI_RESCHEDULE:
scheduler_ipi();
@@ -294,8 +296,10 @@
break;
default:
- pr_warn("IPI with unexpected msg %ld\n", msg);
+ rc = 1;
}
+
+ return rc;
}
/*
@@ -305,6 +309,7 @@
irqreturn_t do_IPI(int irq, void *dev_id)
{
unsigned long pending;
+ unsigned long __maybe_unused copy;
pr_debug("IPI [%ld] received on cpu %d\n",
*this_cpu_ptr(&ipi_data), smp_processor_id());
@@ -316,11 +321,18 @@
* "dequeue" the msg corresponding to this IPI (and possibly other
* piggybacked msg from elided IPIs: see ipi_send_msg_one() above)
*/
- pending = xchg(this_cpu_ptr(&ipi_data), 0);
+ copy = pending = xchg(this_cpu_ptr(&ipi_data), 0);
do {
unsigned long msg = __ffs(pending);
- __do_IPI(msg);
+ int rc;
+
+ rc = __do_IPI(msg);
+#ifdef CONFIG_ARC_IPI_DBG
+ /* IPI received but no valid @msg */
+ if (rc)
+ pr_info("IPI with bogus msg %ld in %ld\n", msg, copy);
+#endif
pending &= ~(1U << msg);
} while (pending);
diff --git a/arch/arc/kernel/stacktrace.c b/arch/arc/kernel/stacktrace.c
index 92320d6..001de4c 100644
--- a/arch/arc/kernel/stacktrace.c
+++ b/arch/arc/kernel/stacktrace.c
@@ -122,19 +122,17 @@
while (1) {
address = UNW_PC(&frame_info);
- if (address && __kernel_text_address(address)) {
- if (consumer_fn(address, arg) == -1)
- break;
- }
+ if (!address || !__kernel_text_address(address))
+ break;
+
+ if (consumer_fn(address, arg) == -1)
+ break;
ret = arc_unwind(&frame_info);
-
- if (ret == 0) {
- frame_info.regs.r63 = frame_info.regs.r31;
- continue;
- } else {
+ if (ret)
break;
- }
+
+ frame_info.regs.r63 = frame_info.regs.r31;
}
return address; /* return the last address it saw */
diff --git a/arch/arc/kernel/time.c b/arch/arc/kernel/time.c
index dbe74f4..3364d2b 100644
--- a/arch/arc/kernel/time.c
+++ b/arch/arc/kernel/time.c
@@ -26,6 +26,7 @@
* while TIMER1 for free running (clocksource)
*
* Newer ARC700 cores have 64bit clk fetching RTSC insn, preferred over TIMER1
+ * which however is currently broken
*/
#include <linux/spinlock.h>
@@ -44,6 +45,8 @@
#include <asm/clk.h>
#include <asm/mach_desc.h>
+#include <asm/mcip.h>
+
/* Timer related Aux registers */
#define ARC_REG_TIMER0_LIMIT 0x23 /* timer 0 limit */
#define ARC_REG_TIMER0_CTRL 0x22 /* timer 0 control */
@@ -59,14 +62,10 @@
/********** Clock Source Device *********/
-#ifdef CONFIG_ARC_HAS_RTSC
+#ifdef CONFIG_ARC_HAS_GRTC
-int arc_counter_setup(void)
+static int arc_counter_setup(void)
{
- /*
- * For SMP this needs to be 0. However Kconfig glue doesn't
- * enable this option for SMP configs
- */
return 1;
}
@@ -75,6 +74,55 @@
unsigned long flags;
union {
#ifdef CONFIG_CPU_BIG_ENDIAN
+ struct { u32 h, l; };
+#else
+ struct { u32 l, h; };
+#endif
+ cycle_t full;
+ } stamp;
+
+ local_irq_save(flags);
+
+ __mcip_cmd(CMD_GRTC_READ_LO, 0);
+ stamp.l = read_aux_reg(ARC_REG_MCIP_READBACK);
+
+ __mcip_cmd(CMD_GRTC_READ_HI, 0);
+ stamp.h = read_aux_reg(ARC_REG_MCIP_READBACK);
+
+ local_irq_restore(flags);
+
+ return stamp.full;
+}
+
+static struct clocksource arc_counter = {
+ .name = "ARConnect GRTC",
+ .rating = 400,
+ .read = arc_counter_read,
+ .mask = CLOCKSOURCE_MASK(64),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+#else
+
+#ifdef CONFIG_ARC_HAS_RTC
+
+#define AUX_RTC_CTRL 0x103
+#define AUX_RTC_LOW 0x104
+#define AUX_RTC_HIGH 0x105
+
+int arc_counter_setup(void)
+{
+ write_aux_reg(AUX_RTC_CTRL, 1);
+
+ /* Not usable in SMP */
+ return !IS_ENABLED(CONFIG_SMP);
+}
+
+static cycle_t arc_counter_read(struct clocksource *cs)
+{
+ unsigned long status;
+ union {
+#ifdef CONFIG_CPU_BIG_ENDIAN
struct { u32 high, low; };
#else
struct { u32 low, high; };
@@ -82,37 +130,27 @@
cycle_t full;
} stamp;
- flags = arch_local_irq_save();
__asm__ __volatile(
- " .extCoreRegister tsch, 58, r, cannot_shortcut \n"
- " rtsc %0, 0 \n"
- " mov %1, 0 \n"
- : "=r" (stamp.low), "=r" (stamp.high));
-
- arch_local_irq_restore(flags);
+ "1: \n"
+ " lr %0, [AUX_RTC_LOW] \n"
+ " lr %1, [AUX_RTC_HIGH] \n"
+ " lr %2, [AUX_RTC_CTRL] \n"
+ " bbit0.nt %2, 31, 1b \n"
+ : "=r" (stamp.low), "=r" (stamp.high), "=r" (status));
return stamp.full;
}
static struct clocksource arc_counter = {
- .name = "ARC RTSC",
- .rating = 300,
+ .name = "ARCv2 RTC",
+ .rating = 350,
.read = arc_counter_read,
- .mask = CLOCKSOURCE_MASK(32),
+ .mask = CLOCKSOURCE_MASK(64),
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
-#else /* !CONFIG_ARC_HAS_RTSC */
-
-static bool is_usable_as_clocksource(void)
-{
-#ifdef CONFIG_SMP
- return 0;
-#else
- return 1;
-#endif
-}
+#else /* !CONFIG_ARC_HAS_RTC */
/*
* set 32bit TIMER1 to keep counting monotonically and wraparound
@@ -123,7 +161,8 @@
write_aux_reg(ARC_REG_TIMER1_CNT, 0);
write_aux_reg(ARC_REG_TIMER1_CTRL, TIMER_CTRL_NH);
- return is_usable_as_clocksource();
+ /* Not usable in SMP */
+ return !IS_ENABLED(CONFIG_SMP);
}
static cycle_t arc_counter_read(struct clocksource *cs)
@@ -140,6 +179,7 @@
};
#endif
+#endif
/********** Clock Event Device *********/
diff --git a/arch/arc/kernel/troubleshoot.c b/arch/arc/kernel/troubleshoot.c
index e00a018..e0cf998 100644
--- a/arch/arc/kernel/troubleshoot.c
+++ b/arch/arc/kernel/troubleshoot.c
@@ -14,6 +14,7 @@
#include <linux/proc_fs.h>
#include <linux/file.h>
#include <asm/arcregs.h>
+#include <asm/irqflags.h>
/*
* Common routine to print scratch regs (r0-r12) or callee regs (r13-r25)
@@ -34,7 +35,10 @@
n += scnprintf(buf + n, len - n, "\n");
/* because pt_regs has regs reversed: r12..r0, r25..r13 */
- reg_rev--;
+ if (is_isa_arcv2() && start_num == 0)
+ reg_rev++;
+ else
+ reg_rev--;
}
if (start_num != 0)
@@ -152,6 +156,15 @@
((cause_code == 0x02) ? "Write" : "EX"));
} else if (vec == ECR_V_INSN_ERR) {
pr_cont("Illegal Insn\n");
+#ifdef CONFIG_ISA_ARCV2
+ } else if (vec == ECR_V_MEM_ERR) {
+ if (cause_code == 0x00)
+ pr_cont("Bus Error from Insn Mem\n");
+ else if (cause_code == 0x10)
+ pr_cont("Bus Error from Data Mem\n");
+ else
+ pr_cont("Bus Error, check PRM\n");
+#endif
} else {
pr_cont("Check Programmer's Manual\n");
}
@@ -185,12 +198,20 @@
pr_info("[STAT32]: 0x%08lx", regs->status32);
-#define STS_BIT(r, bit) r->status32 & STATUS_##bit##_MASK ? #bit : ""
- if (!user_mode(regs))
- pr_cont(" : %2s %2s %2s %2s %2s\n",
- STS_BIT(regs, AE), STS_BIT(regs, A2), STS_BIT(regs, A1),
- STS_BIT(regs, E2), STS_BIT(regs, E1));
+#define STS_BIT(r, bit) r->status32 & STATUS_##bit##_MASK ? #bit" " : ""
+#ifdef CONFIG_ISA_ARCOMPACT
+ pr_cont(" : %2s%2s%2s%2s%2s%2s%2s\n",
+ (regs->status32 & STATUS_U_MASK) ? "U " : "K ",
+ STS_BIT(regs, DE), STS_BIT(regs, AE),
+ STS_BIT(regs, A2), STS_BIT(regs, A1),
+ STS_BIT(regs, E2), STS_BIT(regs, E1));
+#else
+ pr_cont(" : %2s%2s%2s%2s\n",
+ STS_BIT(regs, IE),
+ (regs->status32 & STATUS_U_MASK) ? "U " : "K ",
+ STS_BIT(regs, DE), STS_BIT(regs, AE));
+#endif
pr_info("BTA: 0x%08lx\t SP: 0x%08lx\t FP: 0x%08lx\n",
regs->bta, regs->sp, regs->fp);
pr_info("LPS: 0x%08lx\tLPE: 0x%08lx\tLPC: 0x%08lx\n",
diff --git a/arch/arc/lib/Makefile b/arch/arc/lib/Makefile
index db46e20..b1656d1 100644
--- a/arch/arc/lib/Makefile
+++ b/arch/arc/lib/Makefile
@@ -5,5 +5,7 @@
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
-lib-y := strchr-700.o strcmp.o strcpy-700.o strlen.o
-lib-y += memcmp.o memcpy-700.o memset.o
+lib-y := strchr-700.o strcpy-700.o strlen.o memcmp.o
+
+lib-$(CONFIG_ISA_ARCOMPACT) += memcpy-700.o memset.o strcmp.o
+lib-$(CONFIG_ISA_ARCV2) += memcpy-archs.o memset-archs.o strcmp-archs.o
diff --git a/arch/arc/lib/memcmp.S b/arch/arc/lib/memcmp.S
index 978bf83..a4015e7 100644
--- a/arch/arc/lib/memcmp.S
+++ b/arch/arc/lib/memcmp.S
@@ -24,14 +24,32 @@
ld r4,[r0,0]
ld r5,[r1,0]
lsr.f lp_count,r3,3
+#ifdef CONFIG_ISA_ARCV2
+ /* In ARCv2 a branch can't be the last instruction in a zero overhead
+ * loop.
+ * So we move the branch to the start of the loop, duplicate it
+ * after the end, and set up r12 so that the branch isn't taken
+ * initially.
+ */
+ mov_s r12,WORD2
+ lpne .Loop_end
+ brne WORD2,r12,.Lodd
+ ld WORD2,[r0,4]
+#else
lpne .Loop_end
ld_s WORD2,[r0,4]
+#endif
ld_s r12,[r1,4]
brne r4,r5,.Leven
ld.a r4,[r0,8]
ld.a r5,[r1,8]
+#ifdef CONFIG_ISA_ARCV2
+.Loop_end:
+ brne WORD2,r12,.Lodd
+#else
brne WORD2,r12,.Lodd
.Loop_end:
+#endif
asl_s SHIFT,SHIFT,3
bhs_s .Last_cmp
brne r4,r5,.Leven
@@ -89,7 +107,6 @@
bset.cs r0,r0,31
.Lodd:
cmp_s WORD2,r12
-
mov_s r0,1
j_s.d [blink]
bset.cs r0,r0,31
@@ -100,14 +117,25 @@
ldb r4,[r0,0]
ldb r5,[r1,0]
lsr.f lp_count,r3
+#ifdef CONFIG_ISA_ARCV2
+ mov r12,r3
lpne .Lbyte_end
+ brne r3,r12,.Lbyte_odd
+#else
+ lpne .Lbyte_end
+#endif
ldb_s r3,[r0,1]
ldb r12,[r1,1]
brne r4,r5,.Lbyte_even
ldb.a r4,[r0,2]
ldb.a r5,[r1,2]
+#ifdef CONFIG_ISA_ARCV2
+.Lbyte_end:
+ brne r3,r12,.Lbyte_odd
+#else
brne r3,r12,.Lbyte_odd
.Lbyte_end:
+#endif
bcc .Lbyte_even
brne r4,r5,.Lbyte_even
ldb_s r3,[r0,1]
diff --git a/arch/arc/lib/memcpy-archs.S b/arch/arc/lib/memcpy-archs.S
new file mode 100644
index 0000000..1b2b3ac
--- /dev/null
+++ b/arch/arc/lib/memcpy-archs.S
@@ -0,0 +1,236 @@
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/linkage.h>
+
+#ifdef __LITTLE_ENDIAN__
+# define SHIFT_1(RX,RY,IMM) asl RX, RY, IMM ; <<
+# define SHIFT_2(RX,RY,IMM) lsr RX, RY, IMM ; >>
+# define MERGE_1(RX,RY,IMM) asl RX, RY, IMM
+# define MERGE_2(RX,RY,IMM)
+# define EXTRACT_1(RX,RY,IMM) and RX, RY, 0xFFFF
+# define EXTRACT_2(RX,RY,IMM) lsr RX, RY, IMM
+#else
+# define SHIFT_1(RX,RY,IMM) lsr RX, RY, IMM ; >>
+# define SHIFT_2(RX,RY,IMM) asl RX, RY, IMM ; <<
+# define MERGE_1(RX,RY,IMM) asl RX, RY, IMM ; <<
+# define MERGE_2(RX,RY,IMM) asl RX, RY, IMM ; <<
+# define EXTRACT_1(RX,RY,IMM) lsr RX, RY, IMM
+# define EXTRACT_2(RX,RY,IMM) lsr RX, RY, 0x08
+#endif
+
+#ifdef CONFIG_ARC_HAS_LL64
+# define PREFETCH_READ(RX) prefetch [RX, 56]
+# define PREFETCH_WRITE(RX) prefetchw [RX, 64]
+# define LOADX(DST,RX) ldd.ab DST, [RX, 8]
+# define STOREX(SRC,RX) std.ab SRC, [RX, 8]
+# define ZOLSHFT 5
+# define ZOLAND 0x1F
+#else
+# define PREFETCH_READ(RX) prefetch [RX, 28]
+# define PREFETCH_WRITE(RX) prefetchw [RX, 32]
+# define LOADX(DST,RX) ld.ab DST, [RX, 4]
+# define STOREX(SRC,RX) st.ab SRC, [RX, 4]
+# define ZOLSHFT 4
+# define ZOLAND 0xF
+#endif
+
+ENTRY(memcpy)
+ prefetch [r1] ; Prefetch the read location
+ prefetchw [r0] ; Prefetch the write location
+ mov.f 0, r2
+;;; if size is zero
+ jz.d [blink]
+ mov r3, r0 ; don;t clobber ret val
+
+;;; if size <= 8
+ cmp r2, 8
+ bls.d @smallchunk
+ mov.f lp_count, r2
+
+ and.f r4, r0, 0x03
+ rsub lp_count, r4, 4
+ lpnz @aligndestination
+ ;; LOOP BEGIN
+ ldb.ab r5, [r1,1]
+ sub r2, r2, 1
+ stb.ab r5, [r3,1]
+aligndestination:
+
+;;; Check the alignment of the source
+ and.f r4, r1, 0x03
+ bnz.d @sourceunaligned
+
+;;; CASE 0: Both source and destination are 32bit aligned
+;;; Convert len to Dwords, unfold x4
+ lsr.f lp_count, r2, ZOLSHFT
+ lpnz @copy32_64bytes
+ ;; LOOP START
+ LOADX (r6, r1)
+ PREFETCH_READ (r1)
+ PREFETCH_WRITE (r3)
+ LOADX (r8, r1)
+ LOADX (r10, r1)
+ LOADX (r4, r1)
+ STOREX (r6, r3)
+ STOREX (r8, r3)
+ STOREX (r10, r3)
+ STOREX (r4, r3)
+copy32_64bytes:
+
+ and.f lp_count, r2, ZOLAND ;Last remaining 31 bytes
+smallchunk:
+ lpnz @copyremainingbytes
+ ;; LOOP START
+ ldb.ab r5, [r1,1]
+ stb.ab r5, [r3,1]
+copyremainingbytes:
+
+ j [blink]
+;;; END CASE 0
+
+sourceunaligned:
+ cmp r4, 2
+ beq.d @unalignedOffby2
+ sub r2, r2, 1
+
+ bhi.d @unalignedOffby3
+ ldb.ab r5, [r1, 1]
+
+;;; CASE 1: The source is unaligned, off by 1
+ ;; Hence I need to read 1 byte for a 16bit alignment
+ ;; and 2bytes to reach 32bit alignment
+ ldh.ab r6, [r1, 2]
+ sub r2, r2, 2
+ ;; Convert to words, unfold x2
+ lsr.f lp_count, r2, 3
+ MERGE_1 (r6, r6, 8)
+ MERGE_2 (r5, r5, 24)
+ or r5, r5, r6
+
+ ;; Both src and dst are aligned
+ lpnz @copy8bytes_1
+ ;; LOOP START
+ ld.ab r6, [r1, 4]
+ prefetch [r1, 28] ;Prefetch the next read location
+ ld.ab r8, [r1,4]
+ prefetchw [r3, 32] ;Prefetch the next write location
+
+ SHIFT_1 (r7, r6, 24)
+ or r7, r7, r5
+ SHIFT_2 (r5, r6, 8)
+
+ SHIFT_1 (r9, r8, 24)
+ or r9, r9, r5
+ SHIFT_2 (r5, r8, 8)
+
+ st.ab r7, [r3, 4]
+ st.ab r9, [r3, 4]
+copy8bytes_1:
+
+ ;; Write back the remaining 16bits
+ EXTRACT_1 (r6, r5, 16)
+ sth.ab r6, [r3, 2]
+ ;; Write back the remaining 8bits
+ EXTRACT_2 (r5, r5, 16)
+ stb.ab r5, [r3, 1]
+
+ and.f lp_count, r2, 0x07 ;Last 8bytes
+ lpnz @copybytewise_1
+ ;; LOOP START
+ ldb.ab r6, [r1,1]
+ stb.ab r6, [r3,1]
+copybytewise_1:
+ j [blink]
+
+unalignedOffby2:
+;;; CASE 2: The source is unaligned, off by 2
+ ldh.ab r5, [r1, 2]
+ sub r2, r2, 1
+
+ ;; Both src and dst are aligned
+ ;; Convert to words, unfold x2
+ lsr.f lp_count, r2, 3
+#ifdef __BIG_ENDIAN__
+ asl.nz r5, r5, 16
+#endif
+ lpnz @copy8bytes_2
+ ;; LOOP START
+ ld.ab r6, [r1, 4]
+ prefetch [r1, 28] ;Prefetch the next read location
+ ld.ab r8, [r1,4]
+ prefetchw [r3, 32] ;Prefetch the next write location
+
+ SHIFT_1 (r7, r6, 16)
+ or r7, r7, r5
+ SHIFT_2 (r5, r6, 16)
+
+ SHIFT_1 (r9, r8, 16)
+ or r9, r9, r5
+ SHIFT_2 (r5, r8, 16)
+
+ st.ab r7, [r3, 4]
+ st.ab r9, [r3, 4]
+copy8bytes_2:
+
+#ifdef __BIG_ENDIAN__
+ lsr.nz r5, r5, 16
+#endif
+ sth.ab r5, [r3, 2]
+
+ and.f lp_count, r2, 0x07 ;Last 8bytes
+ lpnz @copybytewise_2
+ ;; LOOP START
+ ldb.ab r6, [r1,1]
+ stb.ab r6, [r3,1]
+copybytewise_2:
+ j [blink]
+
+unalignedOffby3:
+;;; CASE 3: The source is unaligned, off by 3
+;;; Hence, I need to read 1byte for achieve the 32bit alignment
+
+ ;; Both src and dst are aligned
+ ;; Convert to words, unfold x2
+ lsr.f lp_count, r2, 3
+#ifdef __BIG_ENDIAN__
+ asl.ne r5, r5, 24
+#endif
+ lpnz @copy8bytes_3
+ ;; LOOP START
+ ld.ab r6, [r1, 4]
+ prefetch [r1, 28] ;Prefetch the next read location
+ ld.ab r8, [r1,4]
+ prefetch [r3, 32] ;Prefetch the next write location
+
+ SHIFT_1 (r7, r6, 8)
+ or r7, r7, r5
+ SHIFT_2 (r5, r6, 24)
+
+ SHIFT_1 (r9, r8, 8)
+ or r9, r9, r5
+ SHIFT_2 (r5, r8, 24)
+
+ st.ab r7, [r3, 4]
+ st.ab r9, [r3, 4]
+copy8bytes_3:
+
+#ifdef __BIG_ENDIAN__
+ lsr.nz r5, r5, 24
+#endif
+ stb.ab r5, [r3, 1]
+
+ and.f lp_count, r2, 0x07 ;Last 8bytes
+ lpnz @copybytewise_3
+ ;; LOOP START
+ ldb.ab r6, [r1,1]
+ stb.ab r6, [r3,1]
+copybytewise_3:
+ j [blink]
+
+END(memcpy)
diff --git a/arch/arc/lib/memset-archs.S b/arch/arc/lib/memset-archs.S
new file mode 100644
index 0000000..92d573c7
--- /dev/null
+++ b/arch/arc/lib/memset-archs.S
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/linkage.h>
+
+#undef PREALLOC_NOT_AVAIL
+
+#ifdef PREALLOC_NOT_AVAIL
+#define PREWRITE(A,B) prefetchw [(A),(B)]
+#else
+#define PREWRITE(A,B) prealloc [(A),(B)]
+#endif
+
+ENTRY(memset)
+ prefetchw [r0] ; Prefetch the write location
+ mov.f 0, r2
+;;; if size is zero
+ jz.d [blink]
+ mov r3, r0 ; don't clobber ret val
+
+;;; if length < 8
+ brls.d.nt r2, 8, .Lsmallchunk
+ mov.f lp_count,r2
+
+ and.f r4, r0, 0x03
+ rsub lp_count, r4, 4
+ lpnz @.Laligndestination
+ ;; LOOP BEGIN
+ stb.ab r1, [r3,1]
+ sub r2, r2, 1
+.Laligndestination:
+
+;;; Destination is aligned
+ and r1, r1, 0xFF
+ asl r4, r1, 8
+ or r4, r4, r1
+ asl r5, r4, 16
+ or r5, r5, r4
+ mov r4, r5
+
+ sub3 lp_count, r2, 8
+ cmp r2, 64
+ bmsk.hi r2, r2, 5
+ mov.ls lp_count, 0
+ add3.hi r2, r2, 8
+
+;;; Convert len to Dwords, unfold x8
+ lsr.f lp_count, lp_count, 6
+ lpnz @.Lset64bytes
+ ;; LOOP START
+ PREWRITE(r3, 64) ;Prefetch the next write location
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+.Lset64bytes:
+
+ lsr.f lp_count, r2, 5 ;Last remaining max 124 bytes
+ lpnz .Lset32bytes
+ ;; LOOP START
+ prefetchw [r3, 32] ;Prefetch the next write location
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+.Lset32bytes:
+
+ and.f lp_count, r2, 0x1F ;Last remaining 31 bytes
+.Lsmallchunk:
+ lpnz .Lcopy3bytes
+ ;; LOOP START
+ stb.ab r1, [r3, 1]
+.Lcopy3bytes:
+
+ j [blink]
+
+END(memset)
+
+ENTRY(memzero)
+ ; adjust bzero args to memset args
+ mov r2, r1
+ b.d memset ;tail call so need to tinker with blink
+ mov r1, 0
+END(memzero)
diff --git a/arch/arc/lib/strcmp-archs.S b/arch/arc/lib/strcmp-archs.S
new file mode 100644
index 0000000..4f338ee
--- /dev/null
+++ b/arch/arc/lib/strcmp-archs.S
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/linkage.h>
+
+ENTRY(strcmp)
+ or r2, r0, r1
+ bmsk_s r2, r2, 1
+ brne r2, 0, @.Lcharloop
+
+;;; s1 and s2 are word aligned
+ ld.ab r2, [r0, 4]
+
+ mov_s r12, 0x01010101
+ ror r11, r12
+ .align 4
+.LwordLoop:
+ ld.ab r3, [r1, 4]
+ ;; Detect NULL char in str1
+ sub r4, r2, r12
+ ld.ab r5, [r0, 4]
+ bic r4, r4, r2
+ and r4, r4, r11
+ brne.d.nt r4, 0, .LfoundNULL
+ ;; Check if the read locations are the same
+ cmp r2, r3
+ beq.d .LwordLoop
+ mov.eq r2, r5
+
+ ;; A match is found, spot it out
+#ifdef __LITTLE_ENDIAN__
+ swape r3, r3
+ mov_s r0, 1
+ swape r2, r2
+#else
+ mov_s r0, 1
+#endif
+ cmp_s r2, r3
+ j_s.d [blink]
+ bset.lo r0, r0, 31
+
+ .align 4
+.LfoundNULL:
+#ifdef __BIG_ENDIAN__
+ swape r4, r4
+ swape r2, r2
+ swape r3, r3
+#endif
+ ;; Find null byte
+ ffs r0, r4
+ bmsk r2, r2, r0
+ bmsk r3, r3, r0
+ swape r2, r2
+ swape r3, r3
+ ;; make the return value
+ sub.f r0, r2, r3
+ mov.hi r0, 1
+ j_s.d [blink]
+ bset.lo r0, r0, 31
+
+ .align 4
+.Lcharloop:
+ ldb.ab r2, [r0, 1]
+ ldb.ab r3, [r1, 1]
+ nop
+ breq r2, 0, .Lcmpend
+ breq r2, r3, .Lcharloop
+
+ .align 4
+.Lcmpend:
+ j_s.d [blink]
+ sub r0, r2, r3
+END(strcmp)
diff --git a/arch/arc/mm/Makefile b/arch/arc/mm/Makefile
index ac95cc2..7beb941 100644
--- a/arch/arc/mm/Makefile
+++ b/arch/arc/mm/Makefile
@@ -7,4 +7,4 @@
#
obj-y := extable.o ioremap.o dma.o fault.o init.o
-obj-y += tlb.o tlbex.o cache_arc700.o mmap.o
+obj-y += tlb.o tlbex.o cache.o mmap.o
diff --git a/arch/arc/mm/cache_arc700.c b/arch/arc/mm/cache.c
similarity index 67%
rename from arch/arc/mm/cache_arc700.c
rename to arch/arc/mm/cache.c
index 12b2100..b29d62e 100644
--- a/arch/arc/mm/cache_arc700.c
+++ b/arch/arc/mm/cache.c
@@ -1,64 +1,12 @@
/*
- * ARC700 VIPT Cache Management
+ * ARC Cache Management
*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
- *
- * vineetg: May 2011: for Non-aliasing VIPT D-cache following can be NOPs
- * -flush_cache_dup_mm (fork)
- * -likewise for flush_cache_mm (exit/execve)
- * -likewise for flush_cache_range,flush_cache_page (munmap, exit, COW-break)
- *
- * vineetg: Apr 2011
- * -Now that MMU can support larger pg sz (16K), the determiniation of
- * aliasing shd not be based on assumption of 8k pg
- *
- * vineetg: Mar 2011
- * -optimised version of flush_icache_range( ) for making I/D coherent
- * when vaddr is available (agnostic of num of aliases)
- *
- * vineetg: Mar 2011
- * -Added documentation about I-cache aliasing on ARC700 and the way it
- * was handled up until MMU V2.
- * -Spotted a three year old bug when killing the 4 aliases, which needs
- * bottom 2 bits, so we need to do paddr | {0x00, 0x01, 0x02, 0x03}
- * instead of paddr | {0x00, 0x01, 0x10, 0x11}
- * (Rajesh you owe me one now)
- *
- * vineetg: Dec 2010
- * -Off-by-one error when computing num_of_lines to flush
- * This broke signal handling with bionic which uses synthetic sigret stub
- *
- * vineetg: Mar 2010
- * -GCC can't generate ZOL for core cache flush loops.
- * Conv them into iterations based as opposed to while (start < end) types
- *
- * Vineetg: July 2009
- * -In I-cache flush routine we used to chk for aliasing for every line INV.
- * Instead now we setup routines per cache geometry and invoke them
- * via function pointers.
- *
- * Vineetg: Jan 2009
- * -Cache Line flush routines used to flush an extra line beyond end addr
- * because check was while (end >= start) instead of (end > start)
- * =Some call sites had to work around by doing -1, -4 etc to end param
- * =Some callers didnt care. This was spec bad in case of INV routines
- * which would discard valid data (cause of the horrible ext2 bug
- * in ARC IDE driver)
- *
- * vineetg: June 11th 2008: Fixed flush_icache_range( )
- * -Since ARC700 caches are not coherent (I$ doesnt snoop D$) both need
- * to be flushed, which it was not doing.
- * -load_module( ) passes vmalloc addr (Kernel Virtual Addr) to the API,
- * however ARC cache maintenance OPs require PHY addr. Thus need to do
- * vmalloc_to_phy.
- * -Also added optimisation there, that for range > PAGE SIZE we flush the
- * entire cache in one shot rather than line by line. For e.g. a module
- * with Code sz 600k, old code flushed 600k worth of cache (line-by-line),
- * while cache is only 16 or 32k.
*/
#include <linux/module.h>
@@ -73,9 +21,15 @@
#include <asm/cachectl.h>
#include <asm/setup.h>
+static int l2_line_sz;
+
+void (*_cache_line_loop_ic_fn)(unsigned long paddr, unsigned long vaddr,
+ unsigned long sz, const int cacheop);
+
char *arc_cache_mumbojumbo(int c, char *buf, int len)
{
int n = 0;
+ struct cpuinfo_arc_cache *p;
#define PR_CACHE(p, cfg, str) \
if (!(p)->ver) \
@@ -91,6 +45,11 @@
PR_CACHE(&cpuinfo_arc700[c].icache, CONFIG_ARC_HAS_ICACHE, "I-Cache");
PR_CACHE(&cpuinfo_arc700[c].dcache, CONFIG_ARC_HAS_DCACHE, "D-Cache");
+ p = &cpuinfo_arc700[c].slc;
+ if (p->ver)
+ n += scnprintf(buf + n, len - n,
+ "SLC\t\t: %uK, %uB Line\n", p->sz_k, p->line_len);
+
return buf;
}
@@ -101,7 +60,7 @@
*/
void read_decode_cache_bcr(void)
{
- struct cpuinfo_arc_cache *p_ic, *p_dc;
+ struct cpuinfo_arc_cache *p_ic, *p_dc, *p_slc;
unsigned int cpu = smp_processor_id();
struct bcr_cache {
#ifdef CONFIG_CPU_BIG_ENDIAN
@@ -111,14 +70,29 @@
#endif
} ibcr, dbcr;
+ struct bcr_generic sbcr;
+
+ struct bcr_slc_cfg {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad:24, way:2, lsz:2, sz:4;
+#else
+ unsigned int sz:4, lsz:2, way:2, pad:24;
+#endif
+ } slc_cfg;
+
p_ic = &cpuinfo_arc700[cpu].icache;
READ_BCR(ARC_REG_IC_BCR, ibcr);
if (!ibcr.ver)
goto dc_chk;
- BUG_ON(ibcr.config != 3);
- p_ic->assoc = 2; /* Fixed to 2w set assoc */
+ if (ibcr.ver <= 3) {
+ BUG_ON(ibcr.config != 3);
+ p_ic->assoc = 2; /* Fixed to 2w set assoc */
+ } else if (ibcr.ver >= 4) {
+ p_ic->assoc = 1 << ibcr.config; /* 1,2,4,8 */
+ }
+
p_ic->line_len = 8 << ibcr.line_len;
p_ic->sz_k = 1 << (ibcr.sz - 1);
p_ic->ver = ibcr.ver;
@@ -130,66 +104,40 @@
READ_BCR(ARC_REG_DC_BCR, dbcr);
if (!dbcr.ver)
- return;
+ goto slc_chk;
- BUG_ON(dbcr.config != 2);
- p_dc->assoc = 4; /* Fixed to 4w set assoc */
+ if (dbcr.ver <= 3) {
+ BUG_ON(dbcr.config != 2);
+ p_dc->assoc = 4; /* Fixed to 4w set assoc */
+ p_dc->vipt = 1;
+ p_dc->alias = p_dc->sz_k/p_dc->assoc/TO_KB(PAGE_SIZE) > 1;
+ } else if (dbcr.ver >= 4) {
+ p_dc->assoc = 1 << dbcr.config; /* 1,2,4,8 */
+ p_dc->vipt = 0;
+ p_dc->alias = 0; /* PIPT so can't VIPT alias */
+ }
+
p_dc->line_len = 16 << dbcr.line_len;
p_dc->sz_k = 1 << (dbcr.sz - 1);
p_dc->ver = dbcr.ver;
- p_dc->vipt = 1;
- p_dc->alias = p_dc->sz_k/p_dc->assoc/TO_KB(PAGE_SIZE) > 1;
+
+slc_chk:
+ if (!is_isa_arcv2())
+ return;
+
+ p_slc = &cpuinfo_arc700[cpu].slc;
+ READ_BCR(ARC_REG_SLC_BCR, sbcr);
+ if (sbcr.ver) {
+ READ_BCR(ARC_REG_SLC_CFG, slc_cfg);
+ p_slc->ver = sbcr.ver;
+ p_slc->sz_k = 128 << slc_cfg.sz;
+ l2_line_sz = p_slc->line_len = (slc_cfg.lsz == 0) ? 128 : 64;
+ }
}
/*
- * 1. Validate the Cache Geomtery (compile time config matches hardware)
- * 2. If I-cache suffers from aliasing, setup work arounds (difft flush rtn)
- * (aliasing D-cache configurations are not supported YET)
- * 3. Enable the Caches, setup default flush mode for D-Cache
- * 3. Calculate the SHMLBA used by user space
+ * Line Operation on {I,D}-Cache
*/
-void arc_cache_init(void)
-{
- unsigned int __maybe_unused cpu = smp_processor_id();
- char str[256];
-
- printk(arc_cache_mumbojumbo(0, str, sizeof(str)));
-
- if (IS_ENABLED(CONFIG_ARC_HAS_ICACHE)) {
- struct cpuinfo_arc_cache *ic = &cpuinfo_arc700[cpu].icache;
-
- if (!ic->ver)
- panic("cache support enabled but non-existent cache\n");
-
- if (ic->line_len != L1_CACHE_BYTES)
- panic("ICache line [%d] != kernel Config [%d]",
- ic->line_len, L1_CACHE_BYTES);
-
- if (ic->ver != CONFIG_ARC_MMU_VER)
- panic("Cache ver [%d] doesn't match MMU ver [%d]\n",
- ic->ver, CONFIG_ARC_MMU_VER);
- }
-
- if (IS_ENABLED(CONFIG_ARC_HAS_DCACHE)) {
- struct cpuinfo_arc_cache *dc = &cpuinfo_arc700[cpu].dcache;
- int handled;
-
- if (!dc->ver)
- panic("cache support enabled but non-existent cache\n");
-
- if (dc->line_len != L1_CACHE_BYTES)
- panic("DCache line [%d] != kernel Config [%d]",
- dc->line_len, L1_CACHE_BYTES);
-
- /* check for D-Cache aliasing */
- handled = IS_ENABLED(CONFIG_ARC_CACHE_VIPT_ALIASING);
-
- if (dc->alias && !handled)
- panic("Enable CONFIG_ARC_CACHE_VIPT_ALIASING\n");
- else if (!dc->alias && handled)
- panic("Don't need CONFIG_ARC_CACHE_VIPT_ALIASING\n");
- }
-}
#define OP_INV 0x1
#define OP_FLUSH 0x2
@@ -197,162 +145,7 @@
#define OP_INV_IC 0x4
/*
- * Common Helper for Line Operations on {I,D}-Cache
- */
-static inline void __cache_line_loop(unsigned long paddr, unsigned long vaddr,
- unsigned long sz, const int cacheop)
-{
- unsigned int aux_cmd, aux_tag;
- int num_lines;
- const int full_page_op = __builtin_constant_p(sz) && sz == PAGE_SIZE;
-
- if (cacheop == OP_INV_IC) {
- aux_cmd = ARC_REG_IC_IVIL;
-#if (CONFIG_ARC_MMU_VER > 2)
- aux_tag = ARC_REG_IC_PTAG;
-#endif
- }
- else {
- /* d$ cmd: INV (discard or wback-n-discard) OR FLUSH (wback) */
- aux_cmd = cacheop & OP_INV ? ARC_REG_DC_IVDL : ARC_REG_DC_FLDL;
-#if (CONFIG_ARC_MMU_VER > 2)
- aux_tag = ARC_REG_DC_PTAG;
-#endif
- }
-
- /* Ensure we properly floor/ceil the non-line aligned/sized requests
- * and have @paddr - aligned to cache line and integral @num_lines.
- * This however can be avoided for page sized since:
- * -@paddr will be cache-line aligned already (being page aligned)
- * -@sz will be integral multiple of line size (being page sized).
- */
- if (!full_page_op) {
- sz += paddr & ~CACHE_LINE_MASK;
- paddr &= CACHE_LINE_MASK;
- vaddr &= CACHE_LINE_MASK;
- }
-
- num_lines = DIV_ROUND_UP(sz, L1_CACHE_BYTES);
-
-#if (CONFIG_ARC_MMU_VER <= 2)
- /* MMUv2 and before: paddr contains stuffed vaddrs bits */
- paddr |= (vaddr >> PAGE_SHIFT) & 0x1F;
-#else
- /* if V-P const for loop, PTAG can be written once outside loop */
- if (full_page_op)
- write_aux_reg(aux_tag, paddr);
-#endif
-
- while (num_lines-- > 0) {
-#if (CONFIG_ARC_MMU_VER > 2)
- /* MMUv3, cache ops require paddr seperately */
- if (!full_page_op) {
- write_aux_reg(aux_tag, paddr);
- paddr += L1_CACHE_BYTES;
- }
-
- write_aux_reg(aux_cmd, vaddr);
- vaddr += L1_CACHE_BYTES;
-#else
- write_aux_reg(aux_cmd, paddr);
- paddr += L1_CACHE_BYTES;
-#endif
- }
-}
-
-#ifdef CONFIG_ARC_HAS_DCACHE
-
-/***************************************************************
- * Machine specific helpers for Entire D-Cache or Per Line ops
- */
-
-static inline unsigned int __before_dc_op(const int op)
-{
- unsigned int reg = reg;
-
- if (op == OP_FLUSH_N_INV) {
- /* Dcache provides 2 cmd: FLUSH or INV
- * INV inturn has sub-modes: DISCARD or FLUSH-BEFORE
- * flush-n-inv is achieved by INV cmd but with IM=1
- * So toggle INV sub-mode depending on op request and default
- */
- reg = read_aux_reg(ARC_REG_DC_CTRL);
- write_aux_reg(ARC_REG_DC_CTRL, reg | DC_CTRL_INV_MODE_FLUSH)
- ;
- }
-
- return reg;
-}
-
-static inline void __after_dc_op(const int op, unsigned int reg)
-{
- if (op & OP_FLUSH) /* flush / flush-n-inv both wait */
- while (read_aux_reg(ARC_REG_DC_CTRL) & DC_CTRL_FLUSH_STATUS);
-
- /* Switch back to default Invalidate mode */
- if (op == OP_FLUSH_N_INV)
- write_aux_reg(ARC_REG_DC_CTRL, reg & ~DC_CTRL_INV_MODE_FLUSH);
-}
-
-/*
- * Operation on Entire D-Cache
- * @cacheop = {OP_INV, OP_FLUSH, OP_FLUSH_N_INV}
- * Note that constant propagation ensures all the checks are gone
- * in generated code
- */
-static inline void __dc_entire_op(const int cacheop)
-{
- unsigned int ctrl_reg;
- int aux;
-
- ctrl_reg = __before_dc_op(cacheop);
-
- if (cacheop & OP_INV) /* Inv or flush-n-inv use same cmd reg */
- aux = ARC_REG_DC_IVDC;
- else
- aux = ARC_REG_DC_FLSH;
-
- write_aux_reg(aux, 0x1);
-
- __after_dc_op(cacheop, ctrl_reg);
-}
-
-/* For kernel mappings cache operation: index is same as paddr */
-#define __dc_line_op_k(p, sz, op) __dc_line_op(p, p, sz, op)
-
-/*
- * D-Cache : Per Line INV (discard or wback+discard) or FLUSH (wback)
- */
-static inline void __dc_line_op(unsigned long paddr, unsigned long vaddr,
- unsigned long sz, const int cacheop)
-{
- unsigned long flags;
- unsigned int ctrl_reg;
-
- local_irq_save(flags);
-
- ctrl_reg = __before_dc_op(cacheop);
-
- __cache_line_loop(paddr, vaddr, sz, cacheop);
-
- __after_dc_op(cacheop, ctrl_reg);
-
- local_irq_restore(flags);
-}
-
-#else
-
-#define __dc_entire_op(cacheop)
-#define __dc_line_op(paddr, vaddr, sz, cacheop)
-#define __dc_line_op_k(paddr, sz, cacheop)
-
-#endif /* CONFIG_ARC_HAS_DCACHE */
-
-
-#ifdef CONFIG_ARC_HAS_ICACHE
-
-/*
- * I-Cache Aliasing in ARC700 VIPT caches
+ * I-Cache Aliasing in ARC700 VIPT caches (MMU v1-v3)
*
* ARC VIPT I-cache uses vaddr to index into cache and paddr to match the tag.
* The orig Cache Management Module "CDU" only required paddr to invalidate a
@@ -393,9 +186,228 @@
* "tag" bits are provided in PTAG, index bits in existing IVIL/IVDL/FLDL regs
*/
-/***********************************************************
- * Machine specific helper for per line I-Cache invalidate.
+static inline
+void __cache_line_loop_v2(unsigned long paddr, unsigned long vaddr,
+ unsigned long sz, const int op)
+{
+ unsigned int aux_cmd;
+ int num_lines;
+ const int full_page = __builtin_constant_p(sz) && sz == PAGE_SIZE;
+
+ if (op == OP_INV_IC) {
+ aux_cmd = ARC_REG_IC_IVIL;
+ } else {
+ /* d$ cmd: INV (discard or wback-n-discard) OR FLUSH (wback) */
+ aux_cmd = op & OP_INV ? ARC_REG_DC_IVDL : ARC_REG_DC_FLDL;
+ }
+
+ /* Ensure we properly floor/ceil the non-line aligned/sized requests
+ * and have @paddr - aligned to cache line and integral @num_lines.
+ * This however can be avoided for page sized since:
+ * -@paddr will be cache-line aligned already (being page aligned)
+ * -@sz will be integral multiple of line size (being page sized).
+ */
+ if (!full_page) {
+ sz += paddr & ~CACHE_LINE_MASK;
+ paddr &= CACHE_LINE_MASK;
+ vaddr &= CACHE_LINE_MASK;
+ }
+
+ num_lines = DIV_ROUND_UP(sz, L1_CACHE_BYTES);
+
+ /* MMUv2 and before: paddr contains stuffed vaddrs bits */
+ paddr |= (vaddr >> PAGE_SHIFT) & 0x1F;
+
+ while (num_lines-- > 0) {
+ write_aux_reg(aux_cmd, paddr);
+ paddr += L1_CACHE_BYTES;
+ }
+}
+
+static inline
+void __cache_line_loop_v3(unsigned long paddr, unsigned long vaddr,
+ unsigned long sz, const int op)
+{
+ unsigned int aux_cmd, aux_tag;
+ int num_lines;
+ const int full_page = __builtin_constant_p(sz) && sz == PAGE_SIZE;
+
+ if (op == OP_INV_IC) {
+ aux_cmd = ARC_REG_IC_IVIL;
+ aux_tag = ARC_REG_IC_PTAG;
+ } else {
+ aux_cmd = op & OP_INV ? ARC_REG_DC_IVDL : ARC_REG_DC_FLDL;
+ aux_tag = ARC_REG_DC_PTAG;
+ }
+
+ /* Ensure we properly floor/ceil the non-line aligned/sized requests
+ * and have @paddr - aligned to cache line and integral @num_lines.
+ * This however can be avoided for page sized since:
+ * -@paddr will be cache-line aligned already (being page aligned)
+ * -@sz will be integral multiple of line size (being page sized).
+ */
+ if (!full_page) {
+ sz += paddr & ~CACHE_LINE_MASK;
+ paddr &= CACHE_LINE_MASK;
+ vaddr &= CACHE_LINE_MASK;
+ }
+ num_lines = DIV_ROUND_UP(sz, L1_CACHE_BYTES);
+
+ /*
+ * MMUv3, cache ops require paddr in PTAG reg
+ * if V-P const for loop, PTAG can be written once outside loop
+ */
+ if (full_page)
+ write_aux_reg(aux_tag, paddr);
+
+ while (num_lines-- > 0) {
+ if (!full_page) {
+ write_aux_reg(aux_tag, paddr);
+ paddr += L1_CACHE_BYTES;
+ }
+
+ write_aux_reg(aux_cmd, vaddr);
+ vaddr += L1_CACHE_BYTES;
+ }
+}
+
+/*
+ * In HS38x (MMU v4), although icache is VIPT, only paddr is needed for cache
+ * maintenance ops (in IVIL reg), as long as icache doesn't alias.
+ *
+ * For Aliasing icache, vaddr is also needed (in IVIL), while paddr is
+ * specified in PTAG (similar to MMU v3)
*/
+static inline
+void __cache_line_loop_v4(unsigned long paddr, unsigned long vaddr,
+ unsigned long sz, const int cacheop)
+{
+ unsigned int aux_cmd;
+ int num_lines;
+ const int full_page_op = __builtin_constant_p(sz) && sz == PAGE_SIZE;
+
+ if (cacheop == OP_INV_IC) {
+ aux_cmd = ARC_REG_IC_IVIL;
+ } else {
+ /* d$ cmd: INV (discard or wback-n-discard) OR FLUSH (wback) */
+ aux_cmd = cacheop & OP_INV ? ARC_REG_DC_IVDL : ARC_REG_DC_FLDL;
+ }
+
+ /* Ensure we properly floor/ceil the non-line aligned/sized requests
+ * and have @paddr - aligned to cache line and integral @num_lines.
+ * This however can be avoided for page sized since:
+ * -@paddr will be cache-line aligned already (being page aligned)
+ * -@sz will be integral multiple of line size (being page sized).
+ */
+ if (!full_page_op) {
+ sz += paddr & ~CACHE_LINE_MASK;
+ paddr &= CACHE_LINE_MASK;
+ }
+
+ num_lines = DIV_ROUND_UP(sz, L1_CACHE_BYTES);
+
+ while (num_lines-- > 0) {
+ write_aux_reg(aux_cmd, paddr);
+ paddr += L1_CACHE_BYTES;
+ }
+}
+
+#if (CONFIG_ARC_MMU_VER < 3)
+#define __cache_line_loop __cache_line_loop_v2
+#elif (CONFIG_ARC_MMU_VER == 3)
+#define __cache_line_loop __cache_line_loop_v3
+#elif (CONFIG_ARC_MMU_VER > 3)
+#define __cache_line_loop __cache_line_loop_v4
+#endif
+
+#ifdef CONFIG_ARC_HAS_DCACHE
+
+/***************************************************************
+ * Machine specific helpers for Entire D-Cache or Per Line ops
+ */
+
+static inline void __before_dc_op(const int op)
+{
+ if (op == OP_FLUSH_N_INV) {
+ /* Dcache provides 2 cmd: FLUSH or INV
+ * INV inturn has sub-modes: DISCARD or FLUSH-BEFORE
+ * flush-n-inv is achieved by INV cmd but with IM=1
+ * So toggle INV sub-mode depending on op request and default
+ */
+ const unsigned int ctl = ARC_REG_DC_CTRL;
+ write_aux_reg(ctl, read_aux_reg(ctl) | DC_CTRL_INV_MODE_FLUSH);
+ }
+}
+
+static inline void __after_dc_op(const int op)
+{
+ if (op & OP_FLUSH) {
+ const unsigned int ctl = ARC_REG_DC_CTRL;
+ unsigned int reg;
+
+ /* flush / flush-n-inv both wait */
+ while ((reg = read_aux_reg(ctl)) & DC_CTRL_FLUSH_STATUS)
+ ;
+
+ /* Switch back to default Invalidate mode */
+ if (op == OP_FLUSH_N_INV)
+ write_aux_reg(ctl, reg & ~DC_CTRL_INV_MODE_FLUSH);
+ }
+}
+
+/*
+ * Operation on Entire D-Cache
+ * @op = {OP_INV, OP_FLUSH, OP_FLUSH_N_INV}
+ * Note that constant propagation ensures all the checks are gone
+ * in generated code
+ */
+static inline void __dc_entire_op(const int op)
+{
+ int aux;
+
+ __before_dc_op(op);
+
+ if (op & OP_INV) /* Inv or flush-n-inv use same cmd reg */
+ aux = ARC_REG_DC_IVDC;
+ else
+ aux = ARC_REG_DC_FLSH;
+
+ write_aux_reg(aux, 0x1);
+
+ __after_dc_op(op);
+}
+
+/* For kernel mappings cache operation: index is same as paddr */
+#define __dc_line_op_k(p, sz, op) __dc_line_op(p, p, sz, op)
+
+/*
+ * D-Cache Line ops: Per Line INV (discard or wback+discard) or FLUSH (wback)
+ */
+static inline void __dc_line_op(unsigned long paddr, unsigned long vaddr,
+ unsigned long sz, const int op)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ __before_dc_op(op);
+
+ __cache_line_loop(paddr, vaddr, sz, op);
+
+ __after_dc_op(op);
+
+ local_irq_restore(flags);
+}
+
+#else
+
+#define __dc_entire_op(op)
+#define __dc_line_op(paddr, vaddr, sz, op)
+#define __dc_line_op_k(paddr, sz, op)
+
+#endif /* CONFIG_ARC_HAS_DCACHE */
+
+#ifdef CONFIG_ARC_HAS_ICACHE
static inline void __ic_entire_inv(void)
{
@@ -410,7 +422,7 @@
unsigned long flags;
local_irq_save(flags);
- __cache_line_loop(paddr, vaddr, sz, OP_INV_IC);
+ (*_cache_line_loop_ic_fn)(paddr, vaddr, sz, OP_INV_IC);
local_irq_restore(flags);
}
@@ -453,6 +465,53 @@
#endif /* CONFIG_ARC_HAS_ICACHE */
+noinline void slc_op(unsigned long paddr, unsigned long sz, const int op)
+{
+#ifdef CONFIG_ISA_ARCV2
+ unsigned long flags;
+ unsigned int ctrl;
+
+ local_irq_save(flags);
+
+ /*
+ * The Region Flush operation is specified by CTRL.RGN_OP[11..9]
+ * - b'000 (default) is Flush,
+ * - b'001 is Invalidate if CTRL.IM == 0
+ * - b'001 is Flush-n-Invalidate if CTRL.IM == 1
+ */
+ ctrl = read_aux_reg(ARC_REG_SLC_CTRL);
+
+ /* Don't rely on default value of IM bit */
+ if (!(op & OP_FLUSH)) /* i.e. OP_INV */
+ ctrl &= ~SLC_CTRL_IM; /* clear IM: Disable flush before Inv */
+ else
+ ctrl |= SLC_CTRL_IM;
+
+ if (op & OP_INV)
+ ctrl |= SLC_CTRL_RGN_OP_INV; /* Inv or flush-n-inv */
+ else
+ ctrl &= ~SLC_CTRL_RGN_OP_INV;
+
+ write_aux_reg(ARC_REG_SLC_CTRL, ctrl);
+
+ /*
+ * Lower bits are ignored, no need to clip
+ * END needs to be setup before START (latter triggers the operation)
+ * END can't be same as START, so add (l2_line_sz - 1) to sz
+ */
+ write_aux_reg(ARC_REG_SLC_RGN_END, (paddr + sz + l2_line_sz - 1));
+ write_aux_reg(ARC_REG_SLC_RGN_START, paddr);
+
+ while (read_aux_reg(ARC_REG_SLC_CTRL) & SLC_CTRL_BUSY);
+
+ local_irq_restore(flags);
+#endif
+}
+
+static inline int need_slc_flush(void)
+{
+ return is_isa_arcv2() && l2_line_sz;
+}
/***********************************************************
* Exported APIs
@@ -493,7 +552,7 @@
} else if (page_mapped(page)) {
/* kernel reading from page with U-mapping */
- void *paddr = page_address(page);
+ unsigned long paddr = (unsigned long)page_address(page);
unsigned long vaddr = page->index << PAGE_CACHE_SHIFT;
if (addr_not_cache_congruent(paddr, vaddr))
@@ -502,22 +561,30 @@
}
EXPORT_SYMBOL(flush_dcache_page);
-
void dma_cache_wback_inv(unsigned long start, unsigned long sz)
{
__dc_line_op_k(start, sz, OP_FLUSH_N_INV);
+
+ if (need_slc_flush())
+ slc_op(start, sz, OP_FLUSH_N_INV);
}
EXPORT_SYMBOL(dma_cache_wback_inv);
void dma_cache_inv(unsigned long start, unsigned long sz)
{
__dc_line_op_k(start, sz, OP_INV);
+
+ if (need_slc_flush())
+ slc_op(start, sz, OP_INV);
}
EXPORT_SYMBOL(dma_cache_inv);
void dma_cache_wback(unsigned long start, unsigned long sz)
{
__dc_line_op_k(start, sz, OP_FLUSH);
+
+ if (need_slc_flush())
+ slc_op(start, sz, OP_FLUSH);
}
EXPORT_SYMBOL(dma_cache_wback);
@@ -605,7 +672,7 @@
* wrapper to clearout kernel or userspace mappings of a page
* For kernel mappings @vaddr == @paddr
*/
-void ___flush_dcache_page(unsigned long paddr, unsigned long vaddr)
+void __flush_dcache_page(unsigned long paddr, unsigned long vaddr)
{
__dc_line_op(paddr, vaddr & PAGE_MASK, PAGE_SIZE, OP_FLUSH_N_INV);
}
@@ -637,7 +704,7 @@
u_vaddr &= PAGE_MASK;
- ___flush_dcache_page(paddr, u_vaddr);
+ __flush_dcache_page(paddr, u_vaddr);
if (vma->vm_flags & VM_EXEC)
__inv_icache_page(paddr, u_vaddr);
@@ -663,8 +730,8 @@
void copy_user_highpage(struct page *to, struct page *from,
unsigned long u_vaddr, struct vm_area_struct *vma)
{
- void *kfrom = page_address(from);
- void *kto = page_address(to);
+ unsigned long kfrom = (unsigned long)page_address(from);
+ unsigned long kto = (unsigned long)page_address(to);
int clean_src_k_mappings = 0;
/*
@@ -680,7 +747,7 @@
clean_src_k_mappings = 1;
}
- copy_page(kto, kfrom);
+ copy_page((void *)kto, (void *)kfrom);
/*
* Mark DST page K-mapping as dirty for a later finalization by
@@ -721,3 +788,56 @@
flush_cache_all();
return 0;
}
+
+void arc_cache_init(void)
+{
+ unsigned int __maybe_unused cpu = smp_processor_id();
+ char str[256];
+
+ printk(arc_cache_mumbojumbo(0, str, sizeof(str)));
+
+ if (IS_ENABLED(CONFIG_ARC_HAS_ICACHE)) {
+ struct cpuinfo_arc_cache *ic = &cpuinfo_arc700[cpu].icache;
+
+ if (!ic->ver)
+ panic("cache support enabled but non-existent cache\n");
+
+ if (ic->line_len != L1_CACHE_BYTES)
+ panic("ICache line [%d] != kernel Config [%d]",
+ ic->line_len, L1_CACHE_BYTES);
+
+ if (ic->ver != CONFIG_ARC_MMU_VER)
+ panic("Cache ver [%d] doesn't match MMU ver [%d]\n",
+ ic->ver, CONFIG_ARC_MMU_VER);
+
+ /*
+ * In MMU v4 (HS38x) the alising icache config uses IVIL/PTAG
+ * pair to provide vaddr/paddr respectively, just as in MMU v3
+ */
+ if (is_isa_arcv2() && ic->alias)
+ _cache_line_loop_ic_fn = __cache_line_loop_v3;
+ else
+ _cache_line_loop_ic_fn = __cache_line_loop;
+ }
+
+ if (IS_ENABLED(CONFIG_ARC_HAS_DCACHE)) {
+ struct cpuinfo_arc_cache *dc = &cpuinfo_arc700[cpu].dcache;
+
+ if (!dc->ver)
+ panic("cache support enabled but non-existent cache\n");
+
+ if (dc->line_len != L1_CACHE_BYTES)
+ panic("DCache line [%d] != kernel Config [%d]",
+ dc->line_len, L1_CACHE_BYTES);
+
+ /* check for D-Cache aliasing on ARCompact: ARCv2 has PIPT */
+ if (is_isa_arcompact()) {
+ int handled = IS_ENABLED(CONFIG_ARC_CACHE_VIPT_ALIASING);
+
+ if (dc->alias && !handled)
+ panic("Enable CONFIG_ARC_CACHE_VIPT_ALIASING\n");
+ else if (!dc->alias && handled)
+ panic("Disable CONFIG_ARC_CACHE_VIPT_ALIASING\n");
+ }
+ }
+}
diff --git a/arch/arc/mm/dma.c b/arch/arc/mm/dma.c
index 12cc648..74a637a 100644
--- a/arch/arc/mm/dma.c
+++ b/arch/arc/mm/dma.c
@@ -14,8 +14,6 @@
* Cache bit off in the TLB entry.
*
* The default DMA address == Phy address which is 0x8000_0000 based.
- * A platform/device can make it zero based, by over-riding
- * plat_{dma,kernel}_addr_to_{kernel,dma}
*/
#include <linux/dma-mapping.h>
@@ -37,7 +35,7 @@
return NULL;
/* This is bus address, platform dependent */
- *dma_handle = plat_kernel_addr_to_dma(dev, paddr);
+ *dma_handle = (dma_addr_t)paddr;
return paddr;
}
@@ -46,8 +44,7 @@
void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle)
{
- free_pages_exact((void *)plat_dma_addr_to_kernel(dev, dma_handle),
- size);
+ free_pages_exact((void *)dma_handle, size);
}
EXPORT_SYMBOL(dma_free_noncoherent);
@@ -67,7 +64,19 @@
memset(kvaddr, 0, size);
/* This is bus address, platform dependent */
- *dma_handle = plat_kernel_addr_to_dma(dev, paddr);
+ *dma_handle = (dma_addr_t)paddr;
+
+ /*
+ * Evict any existing L1 and/or L2 lines for the backing page
+ * in case it was used earlier as a normal "cached" page.
+ * Yeah this bit us - STAR 9000898266
+ *
+ * Although core does call flush_cache_vmap(), it gets kvaddr hence
+ * can't be used to efficiently flush L1 and/or L2 which need paddr
+ * Currently flush_cache_vmap nukes the L1 cache completely which
+ * will be optimized as a separate commit
+ */
+ dma_cache_wback_inv((unsigned long)paddr, size);
return kvaddr;
}
@@ -78,8 +87,7 @@
{
iounmap((void __force __iomem *)kvaddr);
- free_pages_exact((void *)plat_dma_addr_to_kernel(dev, dma_handle),
- size);
+ free_pages_exact((void *)dma_handle, size);
}
EXPORT_SYMBOL(dma_free_coherent);
diff --git a/arch/arc/mm/tlb.c b/arch/arc/mm/tlb.c
index 7f47d2a..2c7ce8b 100644
--- a/arch/arc/mm/tlb.c
+++ b/arch/arc/mm/tlb.c
@@ -113,6 +113,8 @@
write_aux_reg(ARC_REG_TLBCOMMAND, TLBWrite);
}
+#if (CONFIG_ARC_MMU_VER < 4)
+
static inline unsigned int tlb_entry_lkup(unsigned long vaddr_n_asid)
{
unsigned int idx;
@@ -210,6 +212,28 @@
write_aux_reg(ARC_REG_TLBCOMMAND, TLBWrite);
}
+#else /* CONFIG_ARC_MMU_VER >= 4) */
+
+static void utlb_invalidate(void)
+{
+ /* No need since uTLB is always in sync with JTLB */
+}
+
+static void tlb_entry_erase(unsigned int vaddr_n_asid)
+{
+ write_aux_reg(ARC_REG_TLBPD0, vaddr_n_asid | _PAGE_PRESENT);
+ write_aux_reg(ARC_REG_TLBCOMMAND, TLBDeleteEntry);
+}
+
+static void tlb_entry_insert(unsigned int pd0, unsigned int pd1)
+{
+ write_aux_reg(ARC_REG_TLBPD0, pd0);
+ write_aux_reg(ARC_REG_TLBPD1, pd1);
+ write_aux_reg(ARC_REG_TLBCOMMAND, TLBInsertEntry);
+}
+
+#endif
+
/*
* Un-conditionally (without lookup) erase the entire MMU contents
*/
@@ -582,23 +606,42 @@
#endif
} *mmu3;
+ struct bcr_mmu_4 {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int ver:8, sasid:1, sz1:4, sz0:4, res:2, pae:1,
+ n_ways:2, n_entry:2, n_super:2, u_itlb:3, u_dtlb:3;
+#else
+ /* DTLB ITLB JES JE JA */
+ unsigned int u_dtlb:3, u_itlb:3, n_super:2, n_entry:2, n_ways:2,
+ pae:1, res:2, sz0:4, sz1:4, sasid:1, ver:8;
+#endif
+ } *mmu4;
+
tmp = read_aux_reg(ARC_REG_MMU_BCR);
mmu->ver = (tmp >> 24);
if (mmu->ver <= 2) {
mmu2 = (struct bcr_mmu_1_2 *)&tmp;
- mmu->pg_sz = PAGE_SIZE;
+ mmu->pg_sz_k = TO_KB(PAGE_SIZE);
mmu->sets = 1 << mmu2->sets;
mmu->ways = 1 << mmu2->ways;
mmu->u_dtlb = mmu2->u_dtlb;
mmu->u_itlb = mmu2->u_itlb;
- } else {
+ } else if (mmu->ver == 3) {
mmu3 = (struct bcr_mmu_3 *)&tmp;
- mmu->pg_sz = 512 << mmu3->pg_sz;
+ mmu->pg_sz_k = 1 << (mmu3->pg_sz - 1);
mmu->sets = 1 << mmu3->sets;
mmu->ways = 1 << mmu3->ways;
mmu->u_dtlb = mmu3->u_dtlb;
mmu->u_itlb = mmu3->u_itlb;
+ } else {
+ mmu4 = (struct bcr_mmu_4 *)&tmp;
+ mmu->pg_sz_k = 1 << (mmu4->sz0 - 1);
+ mmu->s_pg_sz_m = 1 << (mmu4->sz1 - 11);
+ mmu->sets = 64 << mmu4->n_entry;
+ mmu->ways = mmu4->n_ways * 2;
+ mmu->u_dtlb = mmu4->u_dtlb * 4;
+ mmu->u_itlb = mmu4->u_itlb * 4;
}
mmu->num_tlb = mmu->sets * mmu->ways;
@@ -608,10 +651,15 @@
{
int n = 0;
struct cpuinfo_arc_mmu *p_mmu = &cpuinfo_arc700[cpu_id].mmu;
+ char super_pg[64] = "";
+
+ if (p_mmu->s_pg_sz_m)
+ scnprintf(super_pg, 64, "%dM Super Page%s, ",
+ p_mmu->s_pg_sz_m, " (not used)");
n += scnprintf(buf + n, len - n,
- "MMU [v%x]\t: %dk PAGE, JTLB %d (%dx%d), uDTLB %d, uITLB %d %s\n",
- p_mmu->ver, TO_KB(p_mmu->pg_sz),
+ "MMU [v%x]\t: %dk PAGE, %sJTLB %d (%dx%d), uDTLB %d, uITLB %d %s\n",
+ p_mmu->ver, p_mmu->pg_sz_k, super_pg,
p_mmu->num_tlb, p_mmu->sets, p_mmu->ways,
p_mmu->u_dtlb, p_mmu->u_itlb,
IS_ENABLED(CONFIG_ARC_MMU_SASID) ? ",SASID" : "");
@@ -639,7 +687,7 @@
mmu->ver, CONFIG_ARC_MMU_VER);
}
- if (mmu->pg_sz != PAGE_SIZE)
+ if (mmu->pg_sz_k != TO_KB(PAGE_SIZE))
panic("MMU pg size != PAGE_SIZE (%luk)\n", TO_KB(PAGE_SIZE));
/* Enable the MMU */
diff --git a/arch/arc/mm/tlbex.S b/arch/arc/mm/tlbex.S
index d572f1c..f6f4c3c 100644
--- a/arch/arc/mm/tlbex.S
+++ b/arch/arc/mm/tlbex.S
@@ -35,8 +35,6 @@
* Rahul Trivedi, Amit Bhor: Codito Technologies 2004
*/
- .cpu A7
-
#include <linux/linkage.h>
#include <asm/entry.h>
#include <asm/mmu.h>
@@ -46,6 +44,7 @@
#include <asm/processor.h>
#include <asm/tlb-mmu1.h>
+#ifdef CONFIG_ISA_ARCOMPACT
;-----------------------------------------------------------------
; ARC700 Exception Handling doesn't auto-switch stack and it only provides
; ONE scratch AUX reg "ARC_REG_SCRATCH_DATA0"
@@ -123,6 +122,24 @@
#endif
.endm
+#else /* ARCv2 */
+
+.macro TLBMISS_FREEUP_REGS
+ PUSH r0
+ PUSH r1
+ PUSH r2
+ PUSH r3
+.endm
+
+.macro TLBMISS_RESTORE_REGS
+ POP r3
+ POP r2
+ POP r1
+ POP r0
+.endm
+
+#endif
+
;============================================================================
; Troubleshooting Stuff
;============================================================================
@@ -241,6 +258,7 @@
; Commit the TLB entry into MMU
.macro COMMIT_ENTRY_TO_MMU
+#if (CONFIG_ARC_MMU_VER < 4)
/* Get free TLB slot: Set = computed from vaddr, way = random */
sr TLBGetIndex, [ARC_REG_TLBCOMMAND]
@@ -251,6 +269,10 @@
#else
sr TLBWrite, [ARC_REG_TLBCOMMAND]
#endif
+
+#else
+ sr TLBInsertEntry, [ARC_REG_TLBCOMMAND]
+#endif
.endm
@@ -291,6 +313,7 @@
CONV_PTE_TO_TLB
COMMIT_ENTRY_TO_MMU
TLBMISS_RESTORE_REGS
+EV_TLBMissI_fast_ret: ; additional label for VDK OS-kit instrumentation
rtie
END(EV_TLBMissI)
@@ -356,6 +379,7 @@
COMMIT_ENTRY_TO_MMU
TLBMISS_RESTORE_REGS
+EV_TLBMissD_fast_ret: ; additional label for VDK OS-kit instrumentation
rtie
;-------- Common routine to call Linux Page Fault Handler -----------
@@ -366,19 +390,5 @@
; Slow path TLB Miss handled as a regular ARC Exception
; (stack switching / save the complete reg-file).
- EXCEPTION_PROLOGUE
-
- ; ------- setup args for Linux Page fault Hanlder ---------
- mov_s r1, sp
- lr r0, [efa]
-
- ; We don't want exceptions to be disabled while the fault is handled.
- ; Now that we have saved the context we return from exception hence
- ; exceptions get re-enable
-
- FAKE_RET_FROM_EXCPN r9
-
- bl do_page_fault
- b ret_from_exception
-
+ b call_do_page_fault
END(EV_TLBMissD)
diff --git a/arch/arc/plat-arcfpga/Kconfig b/arch/arc/plat-arcfpga/Kconfig
deleted file mode 100644
index 217593a..0000000
--- a/arch/arc/plat-arcfpga/Kconfig
+++ /dev/null
@@ -1,33 +0,0 @@
-#
-# Copyright (C) 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 2 as
-# published by the Free Software Foundation.
-#
-
-menuconfig ARC_PLAT_FPGA_LEGACY
- bool "\"Legacy\" ARC FPGA dev Boards"
- select ARC_HAS_COH_CACHES if SMP
- help
- Support for ARC development boards, provided by Synopsys.
- These are based on FPGA or ISS. e.g.
- - ARCAngel4
- - ML509
- - MetaWare ISS
-
-if ARC_PLAT_FPGA_LEGACY
-
-config ISS_SMP_EXTN
- bool "ARC SMP Extensions (ISS Models only)"
- default n
- depends on SMP
- help
- SMP Extensions to ARC700, in a "simulation only" Model, supported in
- ARC ISS (Instruction Set Simulator).
- The SMP extensions include:
- -IDU (Interrupt Distribution Unit)
- -XTL (To enable CPU start/stop/set-PC for another CPU)
- It doesn't provide coherent Caches and/or Atomic Ops (LLOCK/SCOND)
-
-endif
diff --git a/arch/arc/plat-arcfpga/include/plat/smp.h b/arch/arc/plat-arcfpga/include/plat/smp.h
deleted file mode 100644
index c09eb4c..0000000
--- a/arch/arc/plat-arcfpga/include/plat/smp.h
+++ /dev/null
@@ -1,118 +0,0 @@
-/*
- * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Rajeshwar Ranga: Interrupt Distribution Unit API's
- */
-
-#ifndef __PLAT_ARCFPGA_SMP_H
-#define __PLAT_ARCFPGA_SMP_H
-
-#ifdef CONFIG_SMP
-
-#include <linux/types.h>
-#include <asm/arcregs.h>
-
-#define ARC_AUX_IDU_REG_CMD 0x2000
-#define ARC_AUX_IDU_REG_PARAM 0x2001
-
-#define ARC_AUX_XTL_REG_CMD 0x2002
-#define ARC_AUX_XTL_REG_PARAM 0x2003
-
-#define ARC_REG_MP_BCR 0x2021
-
-#define ARC_XTL_CMD_WRITE_PC 0x04
-#define ARC_XTL_CMD_CLEAR_HALT 0x02
-
-/*
- * Build Configuration Register which identifies the sub-components
- */
-struct bcr_mp {
-#ifdef CONFIG_CPU_BIG_ENDIAN
- unsigned int mp_arch:16, pad:5, sdu:1, idu:1, scu:1, ver:8;
-#else
- unsigned int ver:8, scu:1, idu:1, sdu:1, pad:5, mp_arch:16;
-#endif
-};
-
-/* IDU supports 256 common interrupts */
-#define NR_IDU_IRQS 256
-
-/*
- * The Aux Regs layout is same bit-by-bit in both BE/LE modes.
- * However when casted as a bitfield encoded "C" struct, gcc treats it as
- * memory, generating different code for BE/LE, requiring strcture adj (see
- * include/asm/arcregs.h)
- *
- * However when manually "carving" the value for a Aux, no special handling
- * of BE is needed because of the property discribed above
- */
-#define IDU_SET_COMMAND(irq, cmd) \
-do { \
- uint32_t __val; \
- __val = (((irq & 0xFF) << 8) | (cmd & 0xFF)); \
- write_aux_reg(ARC_AUX_IDU_REG_CMD, __val); \
-} while (0)
-
-#define IDU_SET_PARAM(par) write_aux_reg(ARC_AUX_IDU_REG_PARAM, par)
-#define IDU_GET_PARAM() read_aux_reg(ARC_AUX_IDU_REG_PARAM)
-
-/* IDU Commands */
-#define IDU_DISABLE 0x00
-#define IDU_ENABLE 0x01
-#define IDU_IRQ_CLEAR 0x02
-#define IDU_IRQ_ASSERT 0x03
-#define IDU_IRQ_WMODE 0x04
-#define IDU_IRQ_STATUS 0x05
-#define IDU_IRQ_ACK 0x06
-#define IDU_IRQ_PEND 0x07
-#define IDU_IRQ_RMODE 0x08
-#define IDU_IRQ_WBITMASK 0x09
-#define IDU_IRQ_RBITMASK 0x0A
-
-#define idu_enable() IDU_SET_COMMAND(0, IDU_ENABLE)
-#define idu_disable() IDU_SET_COMMAND(0, IDU_DISABLE)
-
-#define idu_irq_assert(irq) IDU_SET_COMMAND((irq), IDU_IRQ_ASSERT)
-#define idu_irq_clear(irq) IDU_SET_COMMAND((irq), IDU_IRQ_CLEAR)
-
-/* IDU Interrupt Mode - Destination Encoding */
-#define IDU_IRQ_MOD_DISABLE 0x00
-#define IDU_IRQ_MOD_ROUND_RECP 0x01
-#define IDU_IRQ_MOD_TCPU_FIRSTRECP 0x02
-#define IDU_IRQ_MOD_TCPU_ALLRECP 0x03
-
-/* IDU Interrupt Mode - Triggering Mode */
-#define IDU_IRQ_MODE_LEVEL_TRIG 0x00
-#define IDU_IRQ_MODE_PULSE_TRIG 0x01
-
-#define IDU_IRQ_MODE_PARAM(dest_mode, trig_mode) \
- (((trig_mode & 0x01) << 15) | (dest_mode & 0xFF))
-
-struct idu_irq_config {
- uint8_t irq;
- uint8_t dest_mode;
- uint8_t trig_mode;
-};
-
-struct idu_irq_status {
- uint8_t irq;
- bool enabled;
- bool status;
- bool ack;
- bool pend;
- uint8_t next_rr;
-};
-
-extern void idu_irq_set_tgtcpu(uint8_t irq, uint32_t mask);
-extern void idu_irq_set_mode(uint8_t irq, uint8_t dest_mode, uint8_t trig_mode);
-
-extern void iss_model_init_smp(unsigned int cpu);
-extern void iss_model_init_early_smp(void);
-
-#endif /* CONFIG_SMP */
-
-#endif
diff --git a/arch/arc/plat-arcfpga/smp.c b/arch/arc/plat-arcfpga/smp.c
deleted file mode 100644
index 64797ba..0000000
--- a/arch/arc/plat-arcfpga/smp.c
+++ /dev/null
@@ -1,186 +0,0 @@
-/*
- * ARC700 Simulation-only Extensions for SMP
- *
- * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Vineet Gupta - 2012 : split off arch common and plat specific SMP
- * Rajeshwar Ranga - 2007 : Interrupt Distribution Unit API's
- */
-
-#include <linux/smp.h>
-#include <linux/irq.h>
-#include <plat/smp.h>
-
-#define IDU_INTERRUPT_0 16
-
-static char smp_cpuinfo_buf[128];
-
-/*
- *-------------------------------------------------------------------
- * Platform specific callbacks expected by arch SMP code
- *-------------------------------------------------------------------
- */
-
-/*
- * Master kick starting another CPU
- */
-static void iss_model_smp_wakeup_cpu(int cpu, unsigned long pc)
-{
- /* setup the start PC */
- write_aux_reg(ARC_AUX_XTL_REG_PARAM, pc);
-
- /* Trigger WRITE_PC cmd for this cpu */
- write_aux_reg(ARC_AUX_XTL_REG_CMD,
- (ARC_XTL_CMD_WRITE_PC | (cpu << 8)));
-
- /* Take the cpu out of Halt */
- write_aux_reg(ARC_AUX_XTL_REG_CMD,
- (ARC_XTL_CMD_CLEAR_HALT | (cpu << 8)));
-
-}
-
-static inline int get_hw_config_num_irq(void)
-{
- uint32_t val = read_aux_reg(ARC_REG_VECBASE_BCR);
-
- switch (val & 0x03) {
- case 0:
- return 16;
- case 1:
- return 32;
- case 2:
- return 8;
- default:
- return 0;
- }
-
- return 0;
-}
-
-/*
- * Any SMP specific init any CPU does when it comes up.
- * Here we setup the CPU to enable Inter-Processor-Interrupts
- * Called for each CPU
- * -Master : init_IRQ()
- * -Other(s) : start_kernel_secondary()
- */
-void iss_model_init_smp(unsigned int cpu)
-{
- /* Check if CPU is configured for more than 16 interrupts */
- if (NR_IRQS <= 16 || get_hw_config_num_irq() <= 16)
- panic("[arcfpga] IRQ system can't support IDU IPI\n");
-
- idu_disable();
-
- /****************************************************************
- * IDU provides a set of Common IRQs, each of which can be dynamically
- * attached to (1|many|all) CPUs.
- * The Common IRQs [0-15] are mapped as CPU pvt [16-31]
- *
- * Here we use a simple 1:1 mapping:
- * A CPU 'x' is wired to Common IRQ 'x'.
- * So an IDU ASSERT on IRQ 'x' will trigger Interupt on CPU 'x', which
- * makes up for our simple IPI plumbing.
- *
- * TBD: Have a dedicated multicast IRQ for sending IPIs to all CPUs
- * w/o having to do one-at-a-time
- ******************************************************************/
-
- /*
- * Claim an IRQ which would trigger IPI on this CPU.
- * In IDU parlance it involves setting up a cpu bitmask for the IRQ
- * The bitmap here contains only 1 CPU (self).
- */
- idu_irq_set_tgtcpu(cpu, 0x1 << cpu);
-
- /* Set the IRQ destination to use the bitmask above */
- idu_irq_set_mode(cpu, 7, /* XXX: IDU_IRQ_MOD_TCPU_ALLRECP: ISS bug */
- IDU_IRQ_MODE_PULSE_TRIG);
-
- idu_enable();
-
- /* Attach the arch-common IPI ISR to our IDU IRQ */
- smp_ipi_irq_setup(cpu, IDU_INTERRUPT_0 + cpu);
-}
-
-static void iss_model_ipi_send(int cpu)
-{
- idu_irq_assert(cpu);
-}
-
-static void iss_model_ipi_clear(int irq)
-{
- idu_irq_clear(IDU_INTERRUPT_0 + smp_processor_id());
-}
-
-void iss_model_init_early_smp(void)
-{
-#define IS_AVAIL1(var, str) ((var) ? str : "")
-
- struct bcr_mp mp;
-
- READ_BCR(ARC_REG_MP_BCR, mp);
-
- sprintf(smp_cpuinfo_buf, "Extn [ISS-SMP]: v%d, arch(%d) %s %s %s\n",
- mp.ver, mp.mp_arch, IS_AVAIL1(mp.scu, "SCU"),
- IS_AVAIL1(mp.idu, "IDU"), IS_AVAIL1(mp.sdu, "SDU"));
-
- plat_smp_ops.info = smp_cpuinfo_buf;
-
- plat_smp_ops.cpu_kick = iss_model_smp_wakeup_cpu;
- plat_smp_ops.ipi_send = iss_model_ipi_send;
- plat_smp_ops.ipi_clear = iss_model_ipi_clear;
-}
-
-/*
- *-------------------------------------------------------------------
- * Low level Platform IPI Providers
- *-------------------------------------------------------------------
- */
-
-/* Set the Mode for the Common IRQ */
-void idu_irq_set_mode(uint8_t irq, uint8_t dest_mode, uint8_t trig_mode)
-{
- uint32_t par = IDU_IRQ_MODE_PARAM(dest_mode, trig_mode);
-
- IDU_SET_PARAM(par);
- IDU_SET_COMMAND(irq, IDU_IRQ_WMODE);
-}
-
-/* Set the target cpu Bitmask for Common IRQ */
-void idu_irq_set_tgtcpu(uint8_t irq, uint32_t mask)
-{
- IDU_SET_PARAM(mask);
- IDU_SET_COMMAND(irq, IDU_IRQ_WBITMASK);
-}
-
-/* Get the Interrupt Acknowledged status for IRQ (as CPU Bitmask) */
-bool idu_irq_get_ack(uint8_t irq)
-{
- uint32_t val;
-
- IDU_SET_COMMAND(irq, IDU_IRQ_ACK);
- val = IDU_GET_PARAM();
-
- return val & (1 << irq);
-}
-
-/*
- * Get the Interrupt Pending status for IRQ (as CPU Bitmask)
- * -Pending means CPU has not yet noticed the IRQ (e.g. disabled)
- * -After Interrupt has been taken, the IPI expcitily needs to be
- * cleared, to be acknowledged.
- */
-bool idu_irq_get_pend(uint8_t irq)
-{
- uint32_t val;
-
- IDU_SET_COMMAND(irq, IDU_IRQ_PEND);
- val = IDU_GET_PARAM();
-
- return val & (1 << irq);
-}
diff --git a/arch/arc/plat-axs10x/Kconfig b/arch/arc/plat-axs10x/Kconfig
new file mode 100644
index 0000000..d475f9d
--- /dev/null
+++ b/arch/arc/plat-axs10x/Kconfig
@@ -0,0 +1,46 @@
+#
+# Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+
+menuconfig ARC_PLAT_AXS10X
+ bool "Synopsys ARC AXS10x Software Development Platforms"
+ select DW_APB_ICTL
+ select GPIO_DWAPB
+ select OF_GPIO
+ select GENERIC_IRQ_CHIP
+ select ARCH_REQUIRE_GPIOLIB
+ help
+ Support for the ARC AXS10x Software Development Platforms.
+
+ The AXS10x Platforms consist of a mainboard with peripherals,
+ on which several daughter cards can be placed. The daughter cards
+ typically contain a CPU and memory.
+
+if ARC_PLAT_AXS10X
+
+config AXS101
+ depends on ISA_ARCOMPACT
+ bool "AXS101 with AXC001 CPU Card (ARC 770D/EM6/AS221)"
+ help
+ This adds support for the 770D/EM6/AS221 CPU Card. Only the ARC
+ 770D is supported in Linux.
+
+ The AXS101 Platform consists of an AXS10x mainboard with
+ this daughtercard. Please use the axs101.dts device tree
+ with this configuration.
+
+config AXS103
+ bool "AXS103 with AXC003 CPU Card (ARC HS38x)"
+ depends on ISA_ARCV2
+ help
+ This adds support for the HS38x CPU Card.
+
+ The AXS103 Platform consists of an AXS10x mainboard with
+ this daughtercard. Please use the axs103.dts device tree
+ with this configuration.
+
+endif
diff --git a/arch/arc/plat-axs10x/Makefile b/arch/arc/plat-axs10x/Makefile
new file mode 100644
index 0000000..d4748f2
--- /dev/null
+++ b/arch/arc/plat-axs10x/Makefile
@@ -0,0 +1,9 @@
+#
+# Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+
+obj-$(CONFIG_ARC_PLAT_AXS10X) += axs10x.o
diff --git a/arch/arc/plat-axs10x/axs10x.c b/arch/arc/plat-axs10x/axs10x.c
new file mode 100644
index 0000000..99f7da5
--- /dev/null
+++ b/arch/arc/plat-axs10x/axs10x.c
@@ -0,0 +1,484 @@
+/*
+ * AXS101/AXS103 Software Development Platform
+ *
+ * Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/of_platform.h>
+
+#include <asm/asm-offsets.h>
+#include <asm/clk.h>
+#include <asm/io.h>
+#include <asm/mach_desc.h>
+#include <asm/mcip.h>
+
+#define AXS_MB_CGU 0xE0010000
+#define AXS_MB_CREG 0xE0011000
+
+#define CREG_MB_IRQ_MUX (AXS_MB_CREG + 0x214)
+#define CREG_MB_SW_RESET (AXS_MB_CREG + 0x220)
+#define CREG_MB_VER (AXS_MB_CREG + 0x230)
+#define CREG_MB_CONFIG (AXS_MB_CREG + 0x234)
+
+#define AXC001_CREG 0xF0001000
+#define AXC001_GPIO_INTC 0xF0003000
+
+static void __init axs10x_enable_gpio_intc_wire(void)
+{
+ /*
+ * Peripherals on CPU Card and Mother Board are wired to cpu intc via
+ * intermediate DW APB GPIO blocks (mainly for debouncing)
+ *
+ * ---------------------
+ * | snps,arc700-intc |
+ * ---------------------
+ * | #7 | #15
+ * ------------------- -------------------
+ * | snps,dw-apb-gpio | | snps,dw-apb-gpio |
+ * ------------------- -------------------
+ * | |
+ * | [ Debug UART on cpu card ]
+ * |
+ * ------------------------
+ * | snps,dw-apb-intc (MB)|
+ * ------------------------
+ * | | | |
+ * [eth] [uart] [... other perip on Main Board]
+ *
+ * Current implementation of "irq-dw-apb-ictl" driver doesn't work well
+ * with stacked INTCs. In particular problem happens if its master INTC
+ * not yet instantiated. See discussion here -
+ * https://lkml.org/lkml/2015/3/4/755
+ *
+ * So setup the first gpio block as a passive pass thru and hide it from
+ * DT hardware topology - connect MB intc directly to cpu intc
+ * The GPIO "wire" needs to be init nevertheless (here)
+ *
+ * One side adv is that peripheral interrupt handling avoids one nested
+ * intc ISR hop
+ */
+#define GPIO_INTEN (AXC001_GPIO_INTC + 0x30)
+#define GPIO_INTMASK (AXC001_GPIO_INTC + 0x34)
+#define GPIO_INTTYPE_LEVEL (AXC001_GPIO_INTC + 0x38)
+#define GPIO_INT_POLARITY (AXC001_GPIO_INTC + 0x3c)
+#define MB_TO_GPIO_IRQ 12
+
+ iowrite32(~(1 << MB_TO_GPIO_IRQ), (void __iomem *) GPIO_INTMASK);
+ iowrite32(0, (void __iomem *) GPIO_INTTYPE_LEVEL);
+ iowrite32(~0, (void __iomem *) GPIO_INT_POLARITY);
+ iowrite32(1 << MB_TO_GPIO_IRQ, (void __iomem *) GPIO_INTEN);
+}
+
+static inline void __init
+write_cgu_reg(uint32_t value, void __iomem *reg, void __iomem *lock_reg)
+{
+ unsigned int loops = 128 * 1024, ctr;
+
+ iowrite32(value, reg);
+
+ ctr = loops;
+ while (((ioread32(lock_reg) & 1) == 1) && ctr--) /* wait for unlock */
+ cpu_relax();
+
+ ctr = loops;
+ while (((ioread32(lock_reg) & 1) == 0) && ctr--) /* wait for re-lock */
+ cpu_relax();
+}
+
+static void __init axs10x_print_board_ver(unsigned int creg, const char *str)
+{
+ union ver {
+ struct {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad:11, y:12, m:4, d:5;
+#else
+ unsigned int d:5, m:4, y:12, pad:11;
+#endif
+ };
+ unsigned int val;
+ } board;
+
+ board.val = ioread32((void __iomem *)creg);
+ pr_info("AXS: %s FPGA Date: %u-%u-%u\n", str, board.d, board.m,
+ board.y);
+}
+
+static void __init axs10x_early_init(void)
+{
+ int mb_rev;
+ char mb[32];
+
+ /* Determine motherboard version */
+ if (ioread32((void __iomem *) CREG_MB_CONFIG) & (1 << 28))
+ mb_rev = 3; /* HT-3 (rev3.0) */
+ else
+ mb_rev = 2; /* HT-2 (rev2.0) */
+
+ axs10x_enable_gpio_intc_wire();
+
+ scnprintf(mb, 32, "MainBoard v%d", mb_rev);
+ axs10x_print_board_ver(CREG_MB_VER, mb);
+}
+
+#ifdef CONFIG_AXS101
+
+#define CREG_CPU_ADDR_770 (AXC001_CREG + 0x20)
+#define CREG_CPU_ADDR_TUNN (AXC001_CREG + 0x60)
+#define CREG_CPU_ADDR_770_UPD (AXC001_CREG + 0x34)
+#define CREG_CPU_ADDR_TUNN_UPD (AXC001_CREG + 0x74)
+
+#define CREG_CPU_ARC770_IRQ_MUX (AXC001_CREG + 0x114)
+#define CREG_CPU_GPIO_UART_MUX (AXC001_CREG + 0x120)
+
+/*
+ * Set up System Memory Map for ARC cpu / peripherals controllers
+ *
+ * Each AXI master has a 4GB memory map specified as 16 apertures of 256MB, each
+ * of which maps to a corresponding 256MB aperture in Target slave memory map.
+ *
+ * e.g. ARC cpu AXI Master's aperture 8 (0x8000_0000) is mapped to aperture 0
+ * (0x0000_0000) of DDR Port 0 (slave #1)
+ *
+ * Access from cpu to MB controllers such as GMAC is setup using AXI Tunnel:
+ * which has master/slaves on both ends.
+ * e.g. aperture 14 (0xE000_0000) of ARC cpu is mapped to aperture 14
+ * (0xE000_0000) of CPU Card AXI Tunnel slave (slave #3) which is mapped to
+ * MB AXI Tunnel Master, which also has a mem map setup
+ *
+ * In the reverse direction, MB AXI Masters (e.g. GMAC) mem map is setup
+ * to map to MB AXI Tunnel slave which connects to CPU Card AXI Tunnel Master
+ */
+struct aperture {
+ unsigned int slave_sel:4, slave_off:4, pad:24;
+};
+
+/* CPU Card target slaves */
+#define AXC001_SLV_NONE 0
+#define AXC001_SLV_DDR_PORT0 1
+#define AXC001_SLV_SRAM 2
+#define AXC001_SLV_AXI_TUNNEL 3
+#define AXC001_SLV_AXI2APB 6
+#define AXC001_SLV_DDR_PORT1 7
+
+/* MB AXI Target slaves */
+#define AXS_MB_SLV_NONE 0
+#define AXS_MB_SLV_AXI_TUNNEL_CPU 1
+#define AXS_MB_SLV_AXI_TUNNEL_HAPS 2
+#define AXS_MB_SLV_SRAM 3
+#define AXS_MB_SLV_CONTROL 4
+
+/* MB AXI masters */
+#define AXS_MB_MST_TUNNEL_CPU 0
+#define AXS_MB_MST_USB_OHCI 10
+
+/*
+ * memmap for ARC core on CPU Card
+ */
+static const struct aperture axc001_memmap[16] = {
+ {AXC001_SLV_AXI_TUNNEL, 0x0},
+ {AXC001_SLV_AXI_TUNNEL, 0x1},
+ {AXC001_SLV_SRAM, 0x0}, /* 0x2000_0000: Local SRAM */
+ {AXC001_SLV_NONE, 0x0},
+ {AXC001_SLV_NONE, 0x0},
+ {AXC001_SLV_NONE, 0x0},
+ {AXC001_SLV_NONE, 0x0},
+ {AXC001_SLV_NONE, 0x0},
+ {AXC001_SLV_DDR_PORT0, 0x0}, /* 0x8000_0000: DDR 0..256M */
+ {AXC001_SLV_DDR_PORT0, 0x1}, /* 0x9000_0000: DDR 256..512M */
+ {AXC001_SLV_DDR_PORT0, 0x2},
+ {AXC001_SLV_DDR_PORT0, 0x3},
+ {AXC001_SLV_NONE, 0x0},
+ {AXC001_SLV_AXI_TUNNEL, 0xD},
+ {AXC001_SLV_AXI_TUNNEL, 0xE}, /* MB: CREG, CGU... */
+ {AXC001_SLV_AXI2APB, 0x0}, /* CPU Card local CREG, CGU... */
+};
+
+/*
+ * memmap for CPU Card AXI Tunnel Master (for access by MB controllers)
+ * GMAC (MB) -> MB AXI Tunnel slave -> CPU Card AXI Tunnel Master -> DDR
+ */
+static const struct aperture axc001_axi_tunnel_memmap[16] = {
+ {AXC001_SLV_AXI_TUNNEL, 0x0},
+ {AXC001_SLV_AXI_TUNNEL, 0x1},
+ {AXC001_SLV_SRAM, 0x0},
+ {AXC001_SLV_NONE, 0x0},
+ {AXC001_SLV_NONE, 0x0},
+ {AXC001_SLV_NONE, 0x0},
+ {AXC001_SLV_NONE, 0x0},
+ {AXC001_SLV_NONE, 0x0},
+ {AXC001_SLV_DDR_PORT1, 0x0},
+ {AXC001_SLV_DDR_PORT1, 0x1},
+ {AXC001_SLV_DDR_PORT1, 0x2},
+ {AXC001_SLV_DDR_PORT1, 0x3},
+ {AXC001_SLV_NONE, 0x0},
+ {AXC001_SLV_AXI_TUNNEL, 0xD},
+ {AXC001_SLV_AXI_TUNNEL, 0xE},
+ {AXC001_SLV_AXI2APB, 0x0},
+};
+
+/*
+ * memmap for MB AXI Masters
+ * Same mem map for all perip controllers as well as MB AXI Tunnel Master
+ */
+static const struct aperture axs_mb_memmap[16] = {
+ {AXS_MB_SLV_SRAM, 0x0},
+ {AXS_MB_SLV_SRAM, 0x0},
+ {AXS_MB_SLV_NONE, 0x0},
+ {AXS_MB_SLV_NONE, 0x0},
+ {AXS_MB_SLV_NONE, 0x0},
+ {AXS_MB_SLV_NONE, 0x0},
+ {AXS_MB_SLV_NONE, 0x0},
+ {AXS_MB_SLV_NONE, 0x0},
+ {AXS_MB_SLV_AXI_TUNNEL_CPU, 0x8}, /* DDR on CPU Card */
+ {AXS_MB_SLV_AXI_TUNNEL_CPU, 0x9}, /* DDR on CPU Card */
+ {AXS_MB_SLV_AXI_TUNNEL_CPU, 0xA},
+ {AXS_MB_SLV_AXI_TUNNEL_CPU, 0xB},
+ {AXS_MB_SLV_NONE, 0x0},
+ {AXS_MB_SLV_AXI_TUNNEL_HAPS, 0xD},
+ {AXS_MB_SLV_CONTROL, 0x0}, /* MB Local CREG, CGU... */
+ {AXS_MB_SLV_AXI_TUNNEL_CPU, 0xF},
+};
+
+static noinline void __init
+axs101_set_memmap(void __iomem *base, const struct aperture map[16])
+{
+ unsigned int slave_select, slave_offset;
+ int i;
+
+ slave_select = slave_offset = 0;
+ for (i = 0; i < 8; i++) {
+ slave_select |= map[i].slave_sel << (i << 2);
+ slave_offset |= map[i].slave_off << (i << 2);
+ }
+
+ iowrite32(slave_select, base + 0x0); /* SLV0 */
+ iowrite32(slave_offset, base + 0x8); /* OFFSET0 */
+
+ slave_select = slave_offset = 0;
+ for (i = 0; i < 8; i++) {
+ slave_select |= map[i+8].slave_sel << (i << 2);
+ slave_offset |= map[i+8].slave_off << (i << 2);
+ }
+
+ iowrite32(slave_select, base + 0x4); /* SLV1 */
+ iowrite32(slave_offset, base + 0xC); /* OFFSET1 */
+}
+
+static void __init axs101_early_init(void)
+{
+ int i;
+
+ /* ARC 770D memory view */
+ axs101_set_memmap((void __iomem *) CREG_CPU_ADDR_770, axc001_memmap);
+ iowrite32(1, (void __iomem *) CREG_CPU_ADDR_770_UPD);
+
+ /* AXI tunnel memory map (incoming traffic from MB into CPU Card */
+ axs101_set_memmap((void __iomem *) CREG_CPU_ADDR_TUNN,
+ axc001_axi_tunnel_memmap);
+ iowrite32(1, (void __iomem *) CREG_CPU_ADDR_TUNN_UPD);
+
+ /* MB peripherals memory map */
+ for (i = AXS_MB_MST_TUNNEL_CPU; i <= AXS_MB_MST_USB_OHCI; i++)
+ axs101_set_memmap((void __iomem *) AXS_MB_CREG + (i << 4),
+ axs_mb_memmap);
+
+ iowrite32(0x3ff, (void __iomem *) AXS_MB_CREG + 0x100); /* Update */
+
+ /* GPIO pins 18 and 19 are used as UART rx and tx, respectively. */
+ iowrite32(0x01, (void __iomem *) CREG_CPU_GPIO_UART_MUX);
+
+ /* Set up the MB interrupt system: mux interrupts to GPIO7) */
+ iowrite32(0x01, (void __iomem *) CREG_MB_IRQ_MUX);
+
+ /* reset ethernet and ULPI interfaces */
+ iowrite32(0x18, (void __iomem *) CREG_MB_SW_RESET);
+
+ /* map GPIO 14:10 to ARC 9:5 (IRQ mux change for MB v2 onwards) */
+ iowrite32(0x52, (void __iomem *) CREG_CPU_ARC770_IRQ_MUX);
+
+ axs10x_early_init();
+}
+
+#endif /* CONFIG_AXS101 */
+
+#ifdef CONFIG_AXS103
+
+#define AXC003_CGU 0xF0000000
+#define AXC003_CREG 0xF0001000
+#define AXC003_MST_AXI_TUNNEL 0
+#define AXC003_MST_HS38 1
+
+#define CREG_CPU_AXI_M0_IRQ_MUX (AXC003_CREG + 0x440)
+#define CREG_CPU_GPIO_UART_MUX (AXC003_CREG + 0x480)
+#define CREG_CPU_TUN_IO_CTRL (AXC003_CREG + 0x494)
+
+
+union pll_reg {
+ struct {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad:17, noupd:1, bypass:1, edge:1, high:6, low:6;
+#else
+ unsigned int low:6, high:6, edge:1, bypass:1, noupd:1, pad:17;
+#endif
+ };
+ unsigned int val;
+};
+
+static unsigned int __init axs103_get_freq(void)
+{
+ union pll_reg idiv, fbdiv, odiv;
+ unsigned int f = 33333333;
+
+ idiv.val = ioread32((void __iomem *)AXC003_CGU + 0x80 + 0);
+ fbdiv.val = ioread32((void __iomem *)AXC003_CGU + 0x80 + 4);
+ odiv.val = ioread32((void __iomem *)AXC003_CGU + 0x80 + 8);
+
+ if (idiv.bypass != 1)
+ f = f / (idiv.low + idiv.high);
+
+ if (fbdiv.bypass != 1)
+ f = f * (fbdiv.low + fbdiv.high);
+
+ if (odiv.bypass != 1)
+ f = f / (odiv.low + odiv.high);
+
+ f = (f + 500000) / 1000000; /* Rounding */
+ return f;
+}
+
+static inline unsigned int __init encode_div(unsigned int id, int upd)
+{
+ union pll_reg div;
+
+ div.val = 0;
+
+ div.noupd = !upd;
+ div.bypass = id == 1 ? 1 : 0;
+ div.edge = (id%2 == 0) ? 0 : 1; /* 0 = rising */
+ div.low = (id%2 == 0) ? id >> 1 : (id >> 1)+1;
+ div.high = id >> 1;
+
+ return div.val;
+}
+
+noinline static void __init
+axs103_set_freq(unsigned int id, unsigned int fd, unsigned int od)
+{
+ write_cgu_reg(encode_div(id, 0),
+ (void __iomem *)AXC003_CGU + 0x80 + 0,
+ (void __iomem *)AXC003_CGU + 0x110);
+
+ write_cgu_reg(encode_div(fd, 0),
+ (void __iomem *)AXC003_CGU + 0x80 + 4,
+ (void __iomem *)AXC003_CGU + 0x110);
+
+ write_cgu_reg(encode_div(od, 1),
+ (void __iomem *)AXC003_CGU + 0x80 + 8,
+ (void __iomem *)AXC003_CGU + 0x110);
+}
+
+static void __init axs103_early_init(void)
+{
+ switch (arc_get_core_freq()/1000000) {
+ case 33:
+ axs103_set_freq(1, 1, 1);
+ break;
+ case 50:
+ axs103_set_freq(1, 30, 20);
+ break;
+ case 75:
+ axs103_set_freq(2, 45, 10);
+ break;
+ case 90:
+ axs103_set_freq(2, 54, 10);
+ break;
+ case 100:
+ axs103_set_freq(1, 30, 10);
+ break;
+ case 125:
+ axs103_set_freq(2, 45, 6);
+ break;
+ default:
+ /*
+ * In this case, core_frequency derived from
+ * DT "clock-frequency" might not match with board value.
+ * Hence update it to match the board value.
+ */
+ arc_set_core_freq(axs103_get_freq() * 1000000);
+ break;
+ }
+
+ pr_info("Freq is %dMHz\n", axs103_get_freq());
+
+ /* Memory maps already config in pre-bootloader */
+
+ /* set GPIO mux to UART */
+ iowrite32(0x01, (void __iomem *) CREG_CPU_GPIO_UART_MUX);
+
+ iowrite32((0x00100000U | 0x000C0000U | 0x00003322U),
+ (void __iomem *) CREG_CPU_TUN_IO_CTRL);
+
+ /* Set up the AXS_MB interrupt system.*/
+ iowrite32(12, (void __iomem *) (CREG_CPU_AXI_M0_IRQ_MUX
+ + (AXC003_MST_HS38 << 2)));
+
+ /* connect ICTL - Main Board with GPIO line */
+ iowrite32(0x01, (void __iomem *) CREG_MB_IRQ_MUX);
+
+ axs10x_print_board_ver(AXC003_CREG + 4088, "AXC003 CPU Card");
+
+ axs10x_early_init();
+
+#ifdef CONFIG_ARC_MCIP
+ /* No Hardware init, but filling the smp ops callbacks */
+ mcip_init_early_smp();
+#endif
+}
+#endif
+
+#ifdef CONFIG_AXS101
+
+static const char *axs101_compat[] __initconst = {
+ "snps,axs101",
+ NULL,
+};
+
+MACHINE_START(AXS101, "axs101")
+ .dt_compat = axs101_compat,
+ .init_early = axs101_early_init,
+MACHINE_END
+
+#endif /* CONFIG_AXS101 */
+
+#ifdef CONFIG_AXS103
+
+static const char *axs103_compat[] __initconst = {
+ "snps,axs103",
+ NULL,
+};
+
+MACHINE_START(AXS103, "axs103")
+ .dt_compat = axs103_compat,
+ .init_early = axs103_early_init,
+#ifdef CONFIG_ARC_MCIP
+ .init_smp = mcip_init_smp,
+#endif
+MACHINE_END
+
+/*
+ * For the VDK OS-kit, to get the offset to pid and command fields
+ */
+char coware_swa_pid_offset[TASK_PID];
+char coware_swa_comm_offset[TASK_COMM];
+
+#endif /* CONFIG_AXS103 */
diff --git a/arch/arc/plat-sim/Kconfig b/arch/arc/plat-sim/Kconfig
new file mode 100644
index 0000000..18e39fc
--- /dev/null
+++ b/arch/arc/plat-sim/Kconfig
@@ -0,0 +1,14 @@
+#
+# Copyright (C) 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+
+menuconfig ARC_PLAT_SIM
+ bool "ARC nSIM based simulation virtual platforms"
+ select ARC_HAS_COH_CACHES if SMP
+ help
+ Support for nSIM based ARC simulation platforms
+ This includes the standalone nSIM (uart only) vs. System C OSCI VP
diff --git a/arch/arc/plat-arcfpga/Makefile b/arch/arc/plat-sim/Makefile
similarity index 75%
rename from arch/arc/plat-arcfpga/Makefile
rename to arch/arc/plat-sim/Makefile
index 66fd0ec..00b1a95 100644
--- a/arch/arc/plat-arcfpga/Makefile
+++ b/arch/arc/plat-sim/Makefile
@@ -6,7 +6,4 @@
# published by the Free Software Foundation.
#
-KBUILD_CFLAGS += -Iarch/arc/plat-arcfpga/include
-
obj-y := platform.o
-obj-$(CONFIG_ISS_SMP_EXTN) += smp.o
diff --git a/arch/arc/plat-arcfpga/platform.c b/arch/arc/plat-sim/platform.c
similarity index 70%
rename from arch/arc/plat-arcfpga/platform.c
rename to arch/arc/plat-sim/platform.c
index afc8825..d9e35b4 100644
--- a/arch/arc/plat-arcfpga/platform.c
+++ b/arch/arc/plat-sim/platform.c
@@ -1,5 +1,5 @@
/*
- * ARC FPGA Platform support code
+ * ARC simulation Platform support code
*
* Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
*
@@ -10,7 +10,7 @@
#include <linux/init.h>
#include <asm/mach_desc.h>
-#include <plat/smp.h>
+#include <asm/mcip.h>
/*----------------------- Machine Descriptions ------------------------------
*
@@ -20,26 +20,18 @@
* callback set, by matching the DT compatible name.
*/
-static const char *legacy_fpga_compat[] __initconst = {
- "snps,arc-angel4",
- "snps,arc-ml509",
- NULL,
-};
-
-MACHINE_START(LEGACY_FPGA, "legacy_fpga")
- .dt_compat = legacy_fpga_compat,
-#ifdef CONFIG_ISS_SMP_EXTN
- .init_early = iss_model_init_early_smp,
- .init_smp = iss_model_init_smp,
-#endif
-MACHINE_END
-
static const char *simulation_compat[] __initconst = {
"snps,nsim",
+ "snps,nsim_hs",
"snps,nsimosci",
+ "snps,nsimosci_hs",
NULL,
};
MACHINE_START(SIMULATION, "simulation")
.dt_compat = simulation_compat,
+#ifdef CONFIG_ARC_MCIP
+ .init_early = mcip_init_early_smp,
+ .init_smp = mcip_init_smp,
+#endif
MACHINE_END
diff --git a/include/asm-generic/barrier.h b/include/asm-generic/barrier.h
index e6a83d7..55e3abc 100644
--- a/include/asm-generic/barrier.h
+++ b/include/asm-generic/barrier.h
@@ -55,17 +55,43 @@
#endif
#ifdef CONFIG_SMP
+
+#ifndef smp_mb
#define smp_mb() mb()
+#endif
+
+#ifndef smp_rmb
#define smp_rmb() rmb()
+#endif
+
+#ifndef smp_wmb
#define smp_wmb() wmb()
+#endif
+
+#ifndef smp_read_barrier_depends
#define smp_read_barrier_depends() read_barrier_depends()
-#else
+#endif
+
+#else /* !CONFIG_SMP */
+
+#ifndef smp_mb
#define smp_mb() barrier()
+#endif
+
+#ifndef smp_rmb
#define smp_rmb() barrier()
+#endif
+
+#ifndef smp_wmb
#define smp_wmb() barrier()
+#endif
+
+#ifndef smp_read_barrier_depends
#define smp_read_barrier_depends() do { } while (0)
#endif
+#endif /* CONFIG_SMP */
+
#ifndef smp_store_mb
#define smp_store_mb(var, value) do { WRITE_ONCE(var, value); mb(); } while (0)
#endif
diff --git a/scripts/sortextable.c b/scripts/sortextable.c
index 1052d48..c2423d9 100644
--- a/scripts/sortextable.c
+++ b/scripts/sortextable.c
@@ -47,6 +47,10 @@
#define EM_MICROBLAZE 189
#endif
+#ifndef EM_ARCV2
+#define EM_ARCV2 195
+#endif
+
static int fd_map; /* File descriptor for file being modified. */
static int mmap_failed; /* Boolean flag. */
static void *ehdr_curr; /* current ElfXX_Ehdr * for resource cleanup */
@@ -281,6 +285,7 @@
custom_sort = sort_relative_table;
break;
case EM_ARCOMPACT:
+ case EM_ARCV2:
case EM_ARM:
case EM_AARCH64:
case EM_MICROBLAZE:
