| # |
| # 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 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_GENERIC_HARDIRQS |
| 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 |
| |
| 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 |
| 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 NO_DMA |
| def_bool n |
| |
| source "init/Kconfig" |
| source "kernel/Kconfig.freezer" |
| |
| menu "ARC Architecture Configuration" |
| |
| menu "ARC Platform/SoC/Board" |
| |
| source "arch/arc/plat-arcfpga/Kconfig" |
| source "arch/arc/plat-tb10x/Kconfig" |
| #New platform adds here |
| |
| endmenu |
| |
| menu "ARC CPU Configuration" |
| |
| choice |
| prompt "ARC Core" |
| default ARC_CPU_770 |
| |
| config ARC_CPU_750D |
| bool "ARC750D" |
| help |
| Support for ARC750 core |
| |
| config ARC_CPU_770 |
| bool "ARC770" |
| select ARC_CPU_REL_4_10 |
| 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 |
| |
| endchoice |
| |
| config CPU_BIG_ENDIAN |
| bool "Enable Big Endian Mode" |
| default n |
| 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)" |
| default n |
| select USE_GENERIC_SMP_HELPERS |
| help |
| This enables support for systems with more than one CPU. If you have |
| a system with only one CPU, like most personal computers, say N. If |
| you have a system with more than one CPU, say Y. |
| |
| if SMP |
| |
| config ARC_HAS_COH_CACHES |
| def_bool n |
| |
| config ARC_HAS_COH_RTSC |
| def_bool n |
| |
| config ARC_HAS_REENTRANT_IRQ_LV2 |
| def_bool n |
| |
| endif |
| |
| config NR_CPUS |
| int "Maximum number of CPUs (2-32)" |
| range 2 32 |
| depends on SMP |
| default "2" |
| |
| 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 |
| |
| 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 "ARC700 MMU Version" |
| default ARC_MMU_V3 if ARC_CPU_770 |
| default ARC_MMU_V2 if ARC_CPU_750D |
| |
| 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) |
| |
| 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 |
| |
| config ARC_PAGE_SIZE_4K |
| bool "4KB" |
| depends on ARC_MMU_V3 |
| |
| endchoice |
| |
| 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 |
| |
| 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. |
| |
| 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 |
| |
| 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)" |
| default y |
| depends on ARC_CPU_REL_4_10 |
| # if SMP, enable RTSC only if counter is coherent across cores |
| depends on !SMP || ARC_HAS_COH_RTSC |
| |
| 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_MISALIGN_ACCESS |
| bool "Emulate unaligned memory access (userspace only)" |
| default N |
| select SYSCTL_ARCH_UNALIGN_NO_WARN |
| select SYSCTL_ARCH_UNALIGN_ALLOW |
| 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 ARC_STACK_NONEXEC |
| bool "Make stack non-executable" |
| default n |
| help |
| To disable the execute permissions of stack/heap of processes |
| which are enabled by default. |
| |
| 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 |
| |
| config ARC_DW2_UNWIND |
| bool "Enable DWARF specific kernel stack unwind" |
| depends on ARC_DBG |
| 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" |
| 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 |
| |
| config CMDLINE_UBOOT |
| bool "Support U-boot kernel command line passing" |
| default n |
| help |
| If you are using U-boot (www.denx.de) and wish to pass the kernel |
| command line from the U-boot environment to the Linux kernel then |
| switch this option on. |
| ARC U-boot will setup the cmdline in RAM/flash and set r2 to point |
| to it. kernel startup code will append this to DeviceTree |
| /bootargs provided cmdline args. |
| |
| 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" |
