| # |
| # 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. |
| # |
| |
| config ARC |
| def_bool y |
| select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC |
| select BUILDTIME_EXTABLE_SORT |
| select COMMON_CLK |
| select CLONE_BACKWARDS |
| # ARC Busybox based initramfs absolutely relies on DEVTMPFS for /dev |
| select DEVTMPFS if !INITRAMFS_SOURCE="" |
| select GENERIC_ATOMIC64 |
| select GENERIC_CLOCKEVENTS |
| select GENERIC_FIND_FIRST_BIT |
| # for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP |
| select GENERIC_IRQ_SHOW |
| select GENERIC_PENDING_IRQ if SMP |
| select GENERIC_SMP_IDLE_THREAD |
| select HAVE_ARCH_KGDB |
| select HAVE_ARCH_TRACEHOOK |
| select HAVE_FUTEX_CMPXCHG |
| select HAVE_IOREMAP_PROT |
| select HAVE_KPROBES |
| select HAVE_KRETPROBES |
| select HAVE_MEMBLOCK |
| select HAVE_MOD_ARCH_SPECIFIC if ARC_DW2_UNWIND |
| select HAVE_OPROFILE |
| select HAVE_PERF_EVENTS |
| select IRQ_DOMAIN |
| select MODULES_USE_ELF_RELA |
| select NO_BOOTMEM |
| select OF |
| select OF_EARLY_FLATTREE |
| select PERF_USE_VMALLOC |
| select HAVE_DEBUG_STACKOVERFLOW |
| |
| config TRACE_IRQFLAGS_SUPPORT |
| def_bool y |
| |
| config LOCKDEP_SUPPORT |
| def_bool y |
| |
| config SCHED_OMIT_FRAME_POINTER |
| def_bool y |
| |
| config GENERIC_CSUM |
| def_bool y |
| |
| config RWSEM_GENERIC_SPINLOCK |
| def_bool y |
| |
| config ARCH_FLATMEM_ENABLE |
| def_bool y |
| |
| config MMU |
| def_bool y |
| |
| config NO_IOPORT_MAP |
| def_bool y |
| |
| config GENERIC_CALIBRATE_DELAY |
| def_bool y |
| |
| config GENERIC_HWEIGHT |
| def_bool y |
| |
| config STACKTRACE_SUPPORT |
| def_bool y |
| select STACKTRACE |
| |
| config HAVE_LATENCYTOP_SUPPORT |
| def_bool y |
| |
| config HAVE_ARCH_TRANSPARENT_HUGEPAGE |
| def_bool y |
| depends on ARC_MMU_V4 |
| |
| source "init/Kconfig" |
| source "kernel/Kconfig.freezer" |
| |
| menu "ARC Architecture Configuration" |
| |
| menu "ARC Platform/SoC/Board" |
| |
| 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 if ISA_ARCOMPACT |
| default ARC_CPU_HS if ISA_ARCV2 |
| |
| if ISA_ARCOMPACT |
| |
| config ARC_CPU_750D |
| bool "ARC750D" |
| select ARC_CANT_LLSC |
| help |
| Support for ARC750 core |
| |
| config ARC_CPU_770 |
| bool "ARC770" |
| 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: |
| -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4) |
| Shared Address Spaces (for sharing TLB entires in MMU) |
| -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 |
| bool "Enable Big Endian Mode" |
| default n |
| help |
| Build kernel for Big Endian Mode of ARC CPU |
| |
| config SMP |
| 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 SMP |
| |
| config ARC_HAS_COH_CACHES |
| def_bool n |
| |
| config ARC_HAS_REENTRANT_IRQ_LV2 |
| def_bool n |
| |
| 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 |
| default "4" |
| |
| endif #SMP |
| |
| menuconfig ARC_CACHE |
| bool "Enable Cache Support" |
| default y |
| # if SMP, cache enabled ONLY if ARC implementation has cache coherency |
| depends on !SMP || ARC_HAS_COH_CACHES |
| |
| if ARC_CACHE |
| |
| config ARC_CACHE_LINE_SHIFT |
| int "Cache Line Length (as power of 2)" |
| range 5 7 |
| default "6" |
| help |
| Starting with ARC700 4.9, Cache line length is configurable, |
| This option specifies "N", with Line-len = 2 power N |
| So line lengths of 32, 64, 128 are specified by 5,6,7, respectively |
| Linux only supports same line lengths for I and D caches. |
| |
| config ARC_HAS_ICACHE |
| bool "Use Instruction Cache" |
| default y |
| |
| config ARC_HAS_DCACHE |
| bool "Use Data Cache" |
| default y |
| |
| config ARC_CACHE_PAGES |
| bool "Per Page Cache Control" |
| default y |
| depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE |
| help |
| This can be used to over-ride the global I/D Cache Enable on a |
| per-page basis (but only for pages accessed via MMU such as |
| Kernel Virtual address or User Virtual Address) |
| TLB entries have a per-page Cache Enable Bit. |
| Note that Global I/D ENABLE + Per Page DISABLE works but corollary |
| Global DISABLE + Per Page ENABLE won't work |
| |
| config ARC_CACHE_VIPT_ALIASING |
| bool "Support VIPT Aliasing D$" |
| depends on ARC_HAS_DCACHE && ISA_ARCOMPACT |
| default n |
| |
| endif #ARC_CACHE |
| |
| config ARC_HAS_ICCM |
| bool "Use ICCM" |
| help |
| Single Cycle RAMS to store Fast Path Code |
| default n |
| |
| config ARC_ICCM_SZ |
| int "ICCM Size in KB" |
| default "64" |
| depends on ARC_HAS_ICCM |
| |
| config ARC_HAS_DCCM |
| bool "Use DCCM" |
| help |
| Single Cycle RAMS to store Fast Path Data |
| default n |
| |
| config ARC_DCCM_SZ |
| int "DCCM Size in KB" |
| default "64" |
| depends on ARC_HAS_DCCM |
| |
| config ARC_DCCM_BASE |
| hex "DCCM map address" |
| default "0xA0000000" |
| depends on ARC_HAS_DCCM |
| |
| config ARC_HAS_HW_MPY |
| bool "Use Hardware Multiplier (Normal or Faster XMAC)" |
| default y |
| help |
| Influences how gcc generates code for MPY operations. |
| If enabled, MPYxx insns are generated, provided by Standard/XMAC |
| Multipler. Otherwise software multipy lib is used |
| |
| choice |
| 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" |
| help |
| Orig ARC700 MMU |
| |
| config ARC_MMU_V2 |
| bool "MMU v2" |
| help |
| Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio |
| when 2 D-TLB and 1 I-TLB entries index into same 2way set. |
| |
| config ARC_MMU_V3 |
| bool "MMU v3" |
| depends on ARC_CPU_770 |
| help |
| Introduced with ARC700 4.10: New Features |
| 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 |
| |
| |
| choice |
| prompt "MMU Page Size" |
| default ARC_PAGE_SIZE_8K |
| |
| config ARC_PAGE_SIZE_8K |
| bool "8KB" |
| help |
| Choose between 8k vs 16k |
| |
| config ARC_PAGE_SIZE_16K |
| bool "16KB" |
| depends on ARC_MMU_V3 || ARC_MMU_V4 |
| |
| config ARC_PAGE_SIZE_4K |
| bool "4KB" |
| depends on ARC_MMU_V3 || ARC_MMU_V4 |
| |
| endchoice |
| |
| if ISA_ARCOMPACT |
| |
| config ARC_COMPACT_IRQ_LEVELS |
| bool "ARCompact IRQ Priorities: High(2)/Low(1)" |
| default n |
| # Timer HAS to be high priority, for any other high priority config |
| select ARC_IRQ3_LV2 |
| # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy |
| depends on !SMP || ARC_HAS_REENTRANT_IRQ_LV2 |
| |
| if ARC_COMPACT_IRQ_LEVELS |
| |
| config ARC_IRQ3_LV2 |
| bool |
| |
| config ARC_IRQ5_LV2 |
| bool |
| |
| config ARC_IRQ6_LV2 |
| bool |
| |
| endif #ARC_COMPACT_IRQ_LEVELS |
| |
| config ARC_FPU_SAVE_RESTORE |
| bool "Enable FPU state persistence across context switch" |
| default n |
| help |
| Double Precision Floating Point unit had dedictaed regs which |
| need to be saved/restored across context-switch. |
| Note that ARC FPU is overly simplistic, unlike say x86, which has |
| hardware pieces to allow software to conditionally save/restore, |
| 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 |
| |
| config ARC_HAS_LLSC |
| bool "Insn: LLOCK/SCOND (efficient atomic ops)" |
| default y |
| depends on !ARC_CANT_LLSC |
| |
| config ARC_STAR_9000923308 |
| bool "Workaround for llock/scond livelock" |
| default y |
| depends on ISA_ARCV2 && SMP && ARC_HAS_LLSC |
| |
| config ARC_HAS_SWAPE |
| bool "Insn: SWAPE (endian-swap)" |
| default y |
| |
| 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 |
| |
| config ARC_HAS_DIV_REM |
| bool "Insn: div, divu, rem, remu" |
| default y |
| |
| 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 |
| hex "Linux Link Address" |
| default "0x80000000" |
| help |
| ARC700 divides the 32 bit phy address space into two equal halves |
| -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU |
| -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel |
| Typically Linux kernel is linked at the start of untransalted addr, |
| hence the default value of 0x8zs. |
| However some customers have peripherals mapped at this addr, so |
| Linux needs to be scooted a bit. |
| If you don't know what the above means, leave this setting alone. |
| |
| config ARC_CURR_IN_REG |
| bool "Dedicate Register r25 for current_task pointer" |
| default y |
| help |
| This reserved Register R25 to point to Current Task in |
| kernel mode. This saves memory access for each such access |
| |
| |
| 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 |
| potential bugs in code |
| |
| config HZ |
| int "Timer Frequency" |
| default 100 |
| |
| config ARC_METAWARE_HLINK |
| bool "Support for Metaware debugger assisted Host access" |
| default n |
| help |
| This options allows a Linux userland apps to directly access |
| host file system (open/creat/read/write etc) with help from |
| Metaware Debugger. This can come in handy for Linux-host communication |
| when there is no real usable peripheral such as EMAC. |
| |
| menuconfig ARC_DBG |
| bool "ARC debugging" |
| default y |
| |
| if ARC_DBG |
| |
| config ARC_DW2_UNWIND |
| bool "Enable DWARF specific kernel stack unwind" |
| default y |
| select KALLSYMS |
| help |
| Compiles the kernel with DWARF unwind information and can be used |
| to get stack backtraces. |
| |
| If you say Y here the resulting kernel image will be slightly larger |
| but not slower, and it will give very useful debugging information. |
| If you don't debug the kernel, you can say N, but we may not be able |
| to solve problems without frame unwind information |
| |
| config ARC_DBG_TLB_PARANOIA |
| bool "Paranoia Checks in Low Level TLB Handlers" |
| default n |
| |
| config ARC_DBG_TLB_MISS_COUNT |
| bool "Profile TLB Misses" |
| default n |
| select DEBUG_FS |
| 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 |
| Set the name of the DTB to embed in the vmlinux binary |
| Leaving it blank selects the minimal "skeleton" dtb |
| |
| source "kernel/Kconfig.preempt" |
| |
| menu "Executable file formats" |
| source "fs/Kconfig.binfmt" |
| endmenu |
| |
| endmenu # "ARC Architecture Configuration" |
| |
| source "mm/Kconfig" |
| source "net/Kconfig" |
| source "drivers/Kconfig" |
| source "fs/Kconfig" |
| source "arch/arc/Kconfig.debug" |
| source "security/Kconfig" |
| source "crypto/Kconfig" |
| source "lib/Kconfig" |
| source "kernel/power/Kconfig" |
