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Diffstat (limited to '')
| -rw-r--r-- | arch/arc/Kconfig | 609 | ||||
| -rw-r--r-- | arch/arc/Kconfig.debug | 10 |
2 files changed, 619 insertions, 0 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig new file mode 100644 index 000000000..0a89cc9de --- /dev/null +++ b/arch/arc/Kconfig @@ -0,0 +1,609 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) +# + +config ARC + def_bool y + select ARC_TIMERS + select ARCH_HAS_DEBUG_VM_PGTABLE + select ARCH_HAS_DMA_PREP_COHERENT + select ARCH_HAS_PTE_SPECIAL + select ARCH_HAS_SETUP_DMA_OPS + select ARCH_HAS_SYNC_DMA_FOR_CPU + select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC + select ARCH_32BIT_OFF_T + select BUILDTIME_TABLE_SORT + select CLONE_BACKWARDS + select COMMON_CLK + select DMA_DIRECT_REMAP + select GENERIC_ATOMIC64 if !ISA_ARCV2 || !(ARC_HAS_LL64 && ARC_HAS_LLSC) + 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_PCI_IOMAP + select GENERIC_PENDING_IRQ if SMP + select GENERIC_SCHED_CLOCK + select GENERIC_SMP_IDLE_THREAD + select HAVE_ARCH_KGDB + select HAVE_ARCH_TRACEHOOK + select HAVE_DEBUG_STACKOVERFLOW + select HAVE_DEBUG_KMEMLEAK + select HAVE_FUTEX_CMPXCHG if FUTEX + select HAVE_IOREMAP_PROT + select HAVE_KERNEL_GZIP + select HAVE_KERNEL_LZMA + select HAVE_KPROBES + select HAVE_KRETPROBES + select HAVE_MOD_ARCH_SPECIFIC + select HAVE_OPROFILE + select HAVE_PERF_EVENTS + select HANDLE_DOMAIN_IRQ + select IRQ_DOMAIN + select MODULES_USE_ELF_RELA + select OF + select OF_EARLY_FLATTREE + select PCI_SYSCALL if PCI + select PERF_USE_VMALLOC if ARC_CACHE_VIPT_ALIASING + select HAVE_ARCH_JUMP_LABEL if ISA_ARCV2 && !CPU_ENDIAN_BE32 + select SET_FS + +config ARCH_HAS_CACHE_LINE_SIZE + def_bool y + +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 ARCH_DISCONTIGMEM_ENABLE + def_bool n + +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_ARCH_TRANSPARENT_HUGEPAGE + def_bool y + depends on ARC_MMU_V4 + +menu "ARC Architecture Configuration" + +menu "ARC Platform/SoC/Board" + +source "arch/arc/plat-tb10x/Kconfig" +source "arch/arc/plat-axs10x/Kconfig" +source "arch/arc/plat-hsdk/Kconfig" + +endmenu + +choice + prompt "ARC Instruction Set" + default ISA_ARCV2 + +config ISA_ARCOMPACT + bool "ARCompact ISA" + select CPU_NO_EFFICIENT_FFS + help + The original ARC ISA of ARC600/700 cores + +config ISA_ARCV2 + bool "ARC ISA v2" + select ARC_TIMERS_64BIT + 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 entries 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 up to 4 cores 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 ARC_TUNE_MCPU + string "Override default -mcpu compiler flag" + default "" + help + Override default -mcpu=xxx compiler flag (which is set depending on + the ISA version) with the specified value. + NOTE: If specified flag isn't supported by current compiler the + ISA default value will be used as a fallback. + +config CPU_BIG_ENDIAN + bool "Enable Big Endian Mode" + help + Build kernel for Big Endian Mode of ARC CPU + +config SMP + bool "Symmetric Multi-Processing" + select ARC_MCIP if ISA_ARCV2 + help + This enables support for systems with more than one CPU. + +if SMP + +config NR_CPUS + int "Maximum number of CPUs (2-4096)" + range 2 4096 + default "4" + +config ARC_SMP_HALT_ON_RESET + bool "Enable Halt-on-reset boot mode" + help + In SMP configuration cores can be configured as Halt-on-reset + or they could all start at same time. For Halt-on-reset, non + masters are parked until Master kicks them so they can start off + at designated entry point. For other case, all jump to common + entry point and spin wait for Master's signal. + +endif #SMP + +config ARC_MCIP + bool "ARConnect Multicore IP (MCIP) Support " + depends on ISA_ARCV2 + default y if SMP + help + This IP block enables SMP in ARC-HS38 cores. + It provides for cross-core interrupts, multi-core debug + hardware semaphores, shared memory,.... + +menuconfig ARC_CACHE + bool "Enable Cache Support" + default y + +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 + +endif #ARC_CACHE + +config ARC_HAS_ICCM + bool "Use ICCM" + help + Single Cycle RAMS to store Fast Path Code + +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 + +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 + +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 + +if ISA_ARCOMPACT + +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 scenario + 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) + +endif + +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 + +choice + prompt "MMU Super Page Size" + depends on ISA_ARCV2 && TRANSPARENT_HUGEPAGE + default ARC_HUGEPAGE_2M + +config ARC_HUGEPAGE_2M + bool "2MB" + +config ARC_HUGEPAGE_16M + bool "16MB" + +endchoice + +config NODES_SHIFT + int "Maximum NUMA Nodes (as a power of 2)" + default "0" if !DISCONTIGMEM + default "1" if DISCONTIGMEM + depends on NEED_MULTIPLE_NODES + help + Accessing memory beyond 1GB (with or w/o PAE) requires 2 memory + zones. + +config ARC_COMPACT_IRQ_LEVELS + depends on ISA_ARCOMPACT + bool "Setup Timer IRQ as high Priority" + # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy + depends on !SMP + +config ARC_FPU_SAVE_RESTORE + bool "Enable FPU state persistence across context switch" + help + ARCompact FPU has internal registers to assist with Double precision + Floating Point operations. There are control and stauts registers + for floating point exceptions and rounding modes. These are + preserved across task context switch when enabled. + +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_HAS_SWAPE + bool "Insn: SWAPE (endian-swap)" + default y + +if ISA_ARCV2 + +config ARC_USE_UNALIGNED_MEM_ACCESS + bool "Enable unaligned access in HW" + default y + select HAVE_EFFICIENT_UNALIGNED_ACCESS + help + The ARC HS architecture supports unaligned memory access + which is disabled by default. Enable unaligned access in + hardware and use software to use it + +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_ACCL_REGS + bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6 and/or DSP)" + default y + help + Depending on the configuration, CPU can contain accumulator reg-pair + (also referred to as r58:r59). These can also be used by gcc as GPR so + kernel needs to save/restore per process + +config ARC_DSP_HANDLED + def_bool n + +config ARC_DSP_SAVE_RESTORE_REGS + def_bool n + +choice + prompt "DSP support" + default ARC_DSP_NONE + help + Depending on the configuration, CPU can contain DSP registers + (ACC0_GLO, ACC0_GHI, DSP_BFLY0, DSP_CTRL, DSP_FFT_CTRL). + Bellow is options describing how to handle these registers in + interrupt entry / exit and in context switch. + +config ARC_DSP_NONE + bool "No DSP extension presence in HW" + help + No DSP extension presence in HW + +config ARC_DSP_KERNEL + bool "DSP extension in HW, no support for userspace" + select ARC_HAS_ACCL_REGS + select ARC_DSP_HANDLED + help + DSP extension presence in HW, no support for DSP-enabled userspace + applications. We don't save / restore DSP registers and only do + some minimal preparations so userspace won't be able to break kernel + +config ARC_DSP_USERSPACE + bool "Support DSP for userspace apps" + select ARC_HAS_ACCL_REGS + select ARC_DSP_HANDLED + select ARC_DSP_SAVE_RESTORE_REGS + help + DSP extension presence in HW, support save / restore DSP registers to + run DSP-enabled userspace applications + +config ARC_DSP_AGU_USERSPACE + bool "Support DSP with AGU for userspace apps" + select ARC_HAS_ACCL_REGS + select ARC_DSP_HANDLED + select ARC_DSP_SAVE_RESTORE_REGS + help + DSP and AGU extensions presence in HW, support save / restore DSP + and AGU registers to run DSP-enabled userspace applications +endchoice + +config ARC_IRQ_NO_AUTOSAVE + bool "Disable hardware autosave regfile on interrupts" + default n + help + On HS cores, taken interrupt auto saves the regfile on stack. + This is programmable and can be optionally disabled in which case + software INTERRUPT_PROLOGUE/EPILGUE do the needed work + +config ARC_LPB_DISABLE + bool "Disable loop buffer (LPB)" + help + On HS cores, loop buffer (LPB) is programmable in runtime and can + be optionally disabled. + +endif # ISA_ARCV2 + +endmenu # "ARC CPU Configuration" + +config LINUX_LINK_BASE + hex "Kernel 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. + This needs to match memory start address specified in Device Tree + +config LINUX_RAM_BASE + hex "RAM base address" + default LINUX_LINK_BASE + help + By default Linux is linked at base of RAM. However in some special + cases (such as HSDK), Linux can't be linked at start of DDR, hence + this option. + +config HIGHMEM + bool "High Memory Support" + select ARCH_DISCONTIGMEM_ENABLE + help + With ARC 2G:2G address split, only upper 2G is directly addressable by + kernel. Enable this to potentially allow access to rest of 2G and PAE + in future + +config ARC_HAS_PAE40 + bool "Support for the 40-bit Physical Address Extension" + depends on ISA_ARCV2 + select HIGHMEM + select PHYS_ADDR_T_64BIT + help + Enable access to physical memory beyond 4G, only supported on + ARC cores with 40 bit Physical Addressing support + +config ARC_KVADDR_SIZE + int "Kernel Virtual Address Space size (MB)" + range 0 512 + default "256" + help + The kernel address space is carved out of 256MB of translated address + space for catering to vmalloc, modules, pkmap, fixmap. This however may + not suffice vmalloc requirements of a 4K CPU EZChip system. So allow + this to be stretched to 512 MB (by extending into the reserved + kernel-user gutter) + +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 + 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" + 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" + +config ARC_DBG_JUMP_LABEL + bool "Paranoid checks in Static Keys (jump labels) code" + depends on JUMP_LABEL + default y if STATIC_KEYS_SELFTEST + help + Enable paranoid checks and self-test of both ARC-specific and generic + part of static keys (jump labels) related code. +endif + +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 + +endmenu # "ARC Architecture Configuration" + +config FORCE_MAX_ZONEORDER + int "Maximum zone order" + default "12" if ARC_HUGEPAGE_16M + default "11" + +source "kernel/power/Kconfig" diff --git a/arch/arc/Kconfig.debug b/arch/arc/Kconfig.debug new file mode 100644 index 000000000..45add86de --- /dev/null +++ b/arch/arc/Kconfig.debug @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: GPL-2.0 + +config 16KSTACKS + bool "Use 16Kb for kernel stacks instead of 8Kb" + help + If you say Y here the kernel will use a 16Kb stacksize for the + kernel stack attached to each process/thread. The default is 8K. + This increases the resident kernel footprint and will cause less + threads to run on the system and also increase the pressure + on the VM subsystem for higher order allocations. |