2 # Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
4 # This program is free software; you can redistribute it and/or modify
5 # it under the terms of the GNU General Public License version 2 as
6 # published by the Free Software Foundation.
11 select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC
12 select BUILDTIME_EXTABLE_SORT
14 select CLONE_BACKWARDS
16 select GENERIC_ATOMIC64 if !ISA_ARCV2 || !(ARC_HAS_LL64 && ARC_HAS_LLSC)
17 select GENERIC_CLOCKEVENTS
18 select GENERIC_FIND_FIRST_BIT
19 # for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP
20 select GENERIC_IRQ_SHOW
21 select GENERIC_PCI_IOMAP
22 select GENERIC_PENDING_IRQ if SMP
23 select GENERIC_SMP_IDLE_THREAD
25 select HAVE_ARCH_TRACEHOOK
26 select HAVE_FUTEX_CMPXCHG
27 select HAVE_IOREMAP_PROT
29 select HAVE_KRETPROBES
31 select HAVE_MOD_ARCH_SPECIFIC
33 select HAVE_PERF_EVENTS
34 select HANDLE_DOMAIN_IRQ
36 select MODULES_USE_ELF_RELA
39 select OF_EARLY_FLATTREE
40 select OF_RESERVED_MEM
41 select PERF_USE_VMALLOC
42 select HAVE_DEBUG_STACKOVERFLOW
43 select HAVE_GENERIC_DMA_COHERENT
44 select HAVE_KERNEL_GZIP
45 select HAVE_KERNEL_LZMA
50 config TRACE_IRQFLAGS_SUPPORT
53 config LOCKDEP_SUPPORT
56 config SCHED_OMIT_FRAME_POINTER
62 config RWSEM_GENERIC_SPINLOCK
65 config ARCH_DISCONTIGMEM_ENABLE
68 config ARCH_FLATMEM_ENABLE
77 config GENERIC_CALIBRATE_DELAY
80 config GENERIC_HWEIGHT
83 config STACKTRACE_SUPPORT
87 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
92 source "kernel/Kconfig.freezer"
94 menu "ARC Architecture Configuration"
96 menu "ARC Platform/SoC/Board"
98 source "arch/arc/plat-sim/Kconfig"
99 source "arch/arc/plat-tb10x/Kconfig"
100 source "arch/arc/plat-axs10x/Kconfig"
101 #New platform adds here
102 source "arch/arc/plat-eznps/Kconfig"
107 prompt "ARC Instruction Set"
108 default ISA_ARCOMPACT
112 select CPU_NO_EFFICIENT_FFS
114 The original ARC ISA of ARC600/700 cores
119 ISA for the Next Generation ARC-HS cores
123 menu "ARC CPU Configuration"
127 default ARC_CPU_770 if ISA_ARCOMPACT
128 default ARC_CPU_HS if ISA_ARCV2
136 Support for ARC750 core
142 Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
143 This core has a bunch of cool new features:
144 -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
145 Shared Address Spaces (for sharing TLB entires in MMU)
146 -Caches: New Prog Model, Region Flush
147 -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
155 Support for ARC HS38x Cores based on ARCv2 ISA
156 The notable features are:
157 - SMP configurations of upto 4 core with coherency
158 - Optional L2 Cache and IO-Coherency
159 - Revised Interrupt Architecture (multiple priorites, reg banks,
160 auto stack switch, auto regfile save/restore)
161 - MMUv4 (PIPT dcache, Huge Pages)
163 * 64bit load/store: LDD, STD
164 * Hardware assisted divide/remainder: DIV, REM
165 * Function prologue/epilogue: ENTER_S, LEAVE_S
166 * IRQ enable/disable: CLRI, SETI
167 * pop count: FFS, FLS
168 * SETcc, BMSKN, XBFU...
172 config CPU_BIG_ENDIAN
173 bool "Enable Big Endian Mode"
176 Build kernel for Big Endian Mode of ARC CPU
179 bool "Symmetric Multi-Processing"
181 select ARC_HAS_COH_CACHES if ISA_ARCV2
182 select ARC_MCIP if ISA_ARCV2
184 This enables support for systems with more than one CPU.
188 config ARC_HAS_COH_CACHES
192 int "Maximum number of CPUs (2-4096)"
196 config ARC_SMP_HALT_ON_RESET
197 bool "Enable Halt-on-reset boot mode"
198 default y if ARC_UBOOT_SUPPORT
200 In SMP configuration cores can be configured as Halt-on-reset
201 or they could all start at same time. For Halt-on-reset, non
202 masters are parked until Master kicks them so they can start of
203 at designated entry point. For other case, all jump to common
204 entry point and spin wait for Master's signal.
209 bool "ARConnect Multicore IP (MCIP) Support "
213 This IP block enables SMP in ARC-HS38 cores.
214 It provides for cross-core interrupts, multi-core debug
215 hardware semaphores, shared memory,....
218 bool "Enable Cache Support"
220 # if SMP, cache enabled ONLY if ARC implementation has cache coherency
221 depends on !SMP || ARC_HAS_COH_CACHES
225 config ARC_CACHE_LINE_SHIFT
226 int "Cache Line Length (as power of 2)"
230 Starting with ARC700 4.9, Cache line length is configurable,
231 This option specifies "N", with Line-len = 2 power N
232 So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
233 Linux only supports same line lengths for I and D caches.
235 config ARC_HAS_ICACHE
236 bool "Use Instruction Cache"
239 config ARC_HAS_DCACHE
240 bool "Use Data Cache"
243 config ARC_CACHE_PAGES
244 bool "Per Page Cache Control"
246 depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
248 This can be used to over-ride the global I/D Cache Enable on a
249 per-page basis (but only for pages accessed via MMU such as
250 Kernel Virtual address or User Virtual Address)
251 TLB entries have a per-page Cache Enable Bit.
252 Note that Global I/D ENABLE + Per Page DISABLE works but corollary
253 Global DISABLE + Per Page ENABLE won't work
255 config ARC_CACHE_VIPT_ALIASING
256 bool "Support VIPT Aliasing D$"
257 depends on ARC_HAS_DCACHE && ISA_ARCOMPACT
265 Single Cycle RAMS to store Fast Path Code
269 int "ICCM Size in KB"
271 depends on ARC_HAS_ICCM
276 Single Cycle RAMS to store Fast Path Data
280 int "DCCM Size in KB"
282 depends on ARC_HAS_DCCM
285 hex "DCCM map address"
287 depends on ARC_HAS_DCCM
291 default ARC_MMU_V3 if ARC_CPU_770
292 default ARC_MMU_V2 if ARC_CPU_750D
293 default ARC_MMU_V4 if ARC_CPU_HS
305 Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
306 when 2 D-TLB and 1 I-TLB entries index into same 2way set.
310 depends on ARC_CPU_770
312 Introduced with ARC700 4.10: New Features
313 Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
314 Shared Address Spaces (SASID)
326 prompt "MMU Page Size"
327 default ARC_PAGE_SIZE_8K
329 config ARC_PAGE_SIZE_8K
332 Choose between 8k vs 16k
334 config ARC_PAGE_SIZE_16K
336 depends on ARC_MMU_V3 || ARC_MMU_V4
338 config ARC_PAGE_SIZE_4K
340 depends on ARC_MMU_V3 || ARC_MMU_V4
345 prompt "MMU Super Page Size"
346 depends on ISA_ARCV2 && TRANSPARENT_HUGEPAGE
347 default ARC_HUGEPAGE_2M
349 config ARC_HUGEPAGE_2M
352 config ARC_HUGEPAGE_16M
358 int "Maximum NUMA Nodes (as a power of 2)"
359 default "0" if !DISCONTIGMEM
360 default "1" if DISCONTIGMEM
361 depends on NEED_MULTIPLE_NODES
363 Accessing memory beyond 1GB (with or w/o PAE) requires 2 memory
368 config ARC_COMPACT_IRQ_LEVELS
369 bool "Setup Timer IRQ as high Priority"
371 # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
374 config ARC_FPU_SAVE_RESTORE
375 bool "Enable FPU state persistence across context switch"
378 Double Precision Floating Point unit had dedictaed regs which
379 need to be saved/restored across context-switch.
380 Note that ARC FPU is overly simplistic, unlike say x86, which has
381 hardware pieces to allow software to conditionally save/restore,
382 based on actual usage of FPU by a task. Thus our implemn does
383 this for all tasks in system.
391 bool "Insn: LLOCK/SCOND (efficient atomic ops)"
393 depends on !ARC_CANT_LLSC
396 bool "Insn: SWAPE (endian-swap)"
402 bool "Insn: 64bit LDD/STD"
404 Enable gcc to generate 64-bit load/store instructions
405 ISA mandates even/odd registers to allow encoding of two
406 dest operands with 2 possible source operands.
409 config ARC_HAS_DIV_REM
410 bool "Insn: div, divu, rem, remu"
414 bool "Local 64-bit r/o cycle counter"
419 bool "SMP synchronized 64-bit cycle counter"
423 config ARC_NUMBER_OF_INTERRUPTS
424 int "Number of interrupts"
428 This defines the number of interrupts on the ARCv2HS core.
429 It affects the size of vector table.
430 The initial 8 IRQs are fixed (Timer, ICI etc) and although configurable
431 in hardware, it keep things simple for Linux to assume they are always
436 endmenu # "ARC CPU Configuration"
438 config LINUX_LINK_BASE
439 hex "Linux Link Address"
442 ARC700 divides the 32 bit phy address space into two equal halves
443 -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
444 -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
445 Typically Linux kernel is linked at the start of untransalted addr,
446 hence the default value of 0x8zs.
447 However some customers have peripherals mapped at this addr, so
448 Linux needs to be scooted a bit.
449 If you don't know what the above means, leave this setting alone.
450 This needs to match memory start address specified in Device Tree
453 bool "High Memory Support"
454 select ARCH_DISCONTIGMEM_ENABLE
456 With ARC 2G:2G address split, only upper 2G is directly addressable by
457 kernel. Enable this to potentially allow access to rest of 2G and PAE
461 bool "Support for the 40-bit Physical Address Extension"
465 Enable access to physical memory beyond 4G, only supported on
466 ARC cores with 40 bit Physical Addressing support
468 config ARCH_PHYS_ADDR_T_64BIT
469 def_bool ARC_HAS_PAE40
471 config ARCH_DMA_ADDR_T_64BIT
474 config ARC_PLAT_NEEDS_PHYS_TO_DMA
477 config ARC_KVADDR_SIZE
478 int "Kernel Virtaul Address Space size (MB)"
482 The kernel address space is carved out of 256MB of translated address
483 space for catering to vmalloc, modules, pkmap, fixmap. This however may
484 not suffice vmalloc requirements of a 4K CPU EZChip system. So allow
485 this to be stretched to 512 MB (by extending into the reserved
488 config ARC_CURR_IN_REG
489 bool "Dedicate Register r25 for current_task pointer"
492 This reserved Register R25 to point to Current Task in
493 kernel mode. This saves memory access for each such access
496 config ARC_EMUL_UNALIGNED
497 bool "Emulate unaligned memory access (userspace only)"
498 select SYSCTL_ARCH_UNALIGN_NO_WARN
499 select SYSCTL_ARCH_UNALIGN_ALLOW
500 depends on ISA_ARCOMPACT
502 This enables misaligned 16 & 32 bit memory access from user space.
503 Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
504 potential bugs in code
507 int "Timer Frequency"
510 config ARC_METAWARE_HLINK
511 bool "Support for Metaware debugger assisted Host access"
514 This options allows a Linux userland apps to directly access
515 host file system (open/creat/read/write etc) with help from
516 Metaware Debugger. This can come in handy for Linux-host communication
517 when there is no real usable peripheral such as EMAC.
525 config ARC_DW2_UNWIND
526 bool "Enable DWARF specific kernel stack unwind"
530 Compiles the kernel with DWARF unwind information and can be used
531 to get stack backtraces.
533 If you say Y here the resulting kernel image will be slightly larger
534 but not slower, and it will give very useful debugging information.
535 If you don't debug the kernel, you can say N, but we may not be able
536 to solve problems without frame unwind information
538 config ARC_DBG_TLB_PARANOIA
539 bool "Paranoia Checks in Low Level TLB Handlers"
544 config ARC_UBOOT_SUPPORT
545 bool "Support uboot arg Handling"
548 ARC Linux by default checks for uboot provided args as pointers to
549 external cmdline or DTB. This however breaks in absence of uboot,
550 when booting from Metaware debugger directly, as the registers are
551 not zeroed out on reset by mdb and/or ARCv2 based cores. The bogus
552 registers look like uboot args to kernel which then chokes.
553 So only enable the uboot arg checking/processing if users are sure
554 of uboot being in play.
556 config ARC_BUILTIN_DTB_NAME
557 string "Built in DTB"
559 Set the name of the DTB to embed in the vmlinux binary
560 Leaving it blank selects the minimal "skeleton" dtb
562 source "kernel/Kconfig.preempt"
564 menu "Executable file formats"
565 source "fs/Kconfig.binfmt"
568 endmenu # "ARC Architecture Configuration"
572 config FORCE_MAX_ZONEORDER
573 int "Maximum zone order"
574 default "12" if ARC_HUGEPAGE_16M
578 source "drivers/Kconfig"
583 bool "PCI support" if MIGHT_HAVE_PCI
585 PCI is the name of a bus system, i.e., the way the CPU talks to
586 the other stuff inside your box. Find out if your board/platform
589 Note: PCIe support for Synopsys Device will be available only
590 when HAPS DX is configured with PCIe RC bitmap. If you have PCI,
596 source "drivers/pci/Kconfig"
601 source "arch/arc/Kconfig.debug"
602 source "security/Kconfig"
603 source "crypto/Kconfig"
605 source "kernel/power/Kconfig"