| # | |
| # 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 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_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 | |
| 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 | |
| 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. | |
| if SMP | |
| config ARC_HAS_COH_CACHES | |
| def_bool n | |
| config ARC_HAS_REENTRANT_IRQ_LV2 | |
| def_bool n | |
| endif | |
| config NR_CPUS | |
| int "Maximum number of CPUs (2-4096)" | |
| range 2 4096 | |
| 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 | |
| config ARC_CACHE_VIPT_ALIASING | |
| bool "Support VIPT Aliasing D$" | |
| depends on ARC_HAS_DCACHE | |
| 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 "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 | |
| depends on !SMP | |
| 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)" | |
| 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 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 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" |