1 # SPDX-License-Identifier: GPL-2.0-only
3 # Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
9 select ARCH_HAS_DEBUG_VM_PGTABLE
10 select ARCH_HAS_DMA_PREP_COHERENT
11 select ARCH_HAS_PTE_SPECIAL
12 select ARCH_HAS_SETUP_DMA_OPS
13 select ARCH_HAS_SYNC_DMA_FOR_CPU
14 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
15 select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC
16 select ARCH_32BIT_OFF_T
17 select BUILDTIME_TABLE_SORT
18 select CLONE_BACKWARDS
20 select DMA_DIRECT_REMAP
21 select GENERIC_ATOMIC64 if !ISA_ARCV2 || !(ARC_HAS_LL64 && ARC_HAS_LLSC)
22 select GENERIC_CLOCKEVENTS
23 select GENERIC_FIND_FIRST_BIT
24 # for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP
25 select GENERIC_IRQ_SHOW
26 select GENERIC_PCI_IOMAP
27 select GENERIC_PENDING_IRQ if SMP
28 select GENERIC_SCHED_CLOCK
29 select GENERIC_SMP_IDLE_THREAD
31 select HAVE_ARCH_TRACEHOOK
32 select HAVE_COPY_THREAD_TLS
33 select HAVE_DEBUG_STACKOVERFLOW
34 select HAVE_DEBUG_KMEMLEAK
35 select HAVE_FUTEX_CMPXCHG if FUTEX
36 select HAVE_IOREMAP_PROT
37 select HAVE_KERNEL_GZIP
38 select HAVE_KERNEL_LZMA
40 select HAVE_KRETPROBES
41 select HAVE_MOD_ARCH_SPECIFIC
43 select HAVE_PERF_EVENTS
44 select HANDLE_DOMAIN_IRQ
46 select MODULES_USE_ELF_RELA
48 select OF_EARLY_FLATTREE
49 select PCI_SYSCALL if PCI
50 select PERF_USE_VMALLOC if ARC_CACHE_VIPT_ALIASING
51 select HAVE_ARCH_JUMP_LABEL if ISA_ARCV2 && !CPU_ENDIAN_BE32
53 config ARCH_HAS_CACHE_LINE_SIZE
56 config TRACE_IRQFLAGS_SUPPORT
59 config LOCKDEP_SUPPORT
62 config SCHED_OMIT_FRAME_POINTER
68 config ARCH_DISCONTIGMEM_ENABLE
71 config ARCH_FLATMEM_ENABLE
80 config GENERIC_CALIBRATE_DELAY
83 config GENERIC_HWEIGHT
86 config STACKTRACE_SUPPORT
90 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
94 menu "ARC Architecture Configuration"
96 menu "ARC Platform/SoC/Board"
98 source "arch/arc/plat-tb10x/Kconfig"
99 source "arch/arc/plat-axs10x/Kconfig"
100 #New platform adds here
101 source "arch/arc/plat-eznps/Kconfig"
102 source "arch/arc/plat-hsdk/Kconfig"
107 prompt "ARC Instruction Set"
112 select CPU_NO_EFFICIENT_FFS
114 The original ARC ISA of ARC600/700 cores
118 select ARC_TIMERS_64BIT
120 ISA for the Next Generation ARC-HS cores
124 menu "ARC CPU Configuration"
128 default ARC_CPU_770 if ISA_ARCOMPACT
129 default ARC_CPU_HS if ISA_ARCV2
137 Support for ARC750 core
143 Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
144 This core has a bunch of cool new features:
145 -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
146 Shared Address Spaces (for sharing TLB entries in MMU)
147 -Caches: New Prog Model, Region Flush
148 -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
156 Support for ARC HS38x Cores based on ARCv2 ISA
157 The notable features are:
158 - SMP configurations of up to 4 cores with coherency
159 - Optional L2 Cache and IO-Coherency
160 - Revised Interrupt Architecture (multiple priorites, reg banks,
161 auto stack switch, auto regfile save/restore)
162 - MMUv4 (PIPT dcache, Huge Pages)
164 * 64bit load/store: LDD, STD
165 * Hardware assisted divide/remainder: DIV, REM
166 * Function prologue/epilogue: ENTER_S, LEAVE_S
167 * IRQ enable/disable: CLRI, SETI
168 * pop count: FFS, FLS
169 * SETcc, BMSKN, XBFU...
173 config CPU_BIG_ENDIAN
174 bool "Enable Big Endian Mode"
176 Build kernel for Big Endian Mode of ARC CPU
179 bool "Symmetric Multi-Processing"
180 select ARC_MCIP if ISA_ARCV2
182 This enables support for systems with more than one CPU.
187 int "Maximum number of CPUs (2-4096)"
191 config ARC_SMP_HALT_ON_RESET
192 bool "Enable Halt-on-reset boot mode"
194 In SMP configuration cores can be configured as Halt-on-reset
195 or they could all start at same time. For Halt-on-reset, non
196 masters are parked until Master kicks them so they can start off
197 at designated entry point. For other case, all jump to common
198 entry point and spin wait for Master's signal.
203 bool "ARConnect Multicore IP (MCIP) Support "
207 This IP block enables SMP in ARC-HS38 cores.
208 It provides for cross-core interrupts, multi-core debug
209 hardware semaphores, shared memory,....
212 bool "Enable Cache Support"
217 config ARC_CACHE_LINE_SHIFT
218 int "Cache Line Length (as power of 2)"
222 Starting with ARC700 4.9, Cache line length is configurable,
223 This option specifies "N", with Line-len = 2 power N
224 So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
225 Linux only supports same line lengths for I and D caches.
227 config ARC_HAS_ICACHE
228 bool "Use Instruction Cache"
231 config ARC_HAS_DCACHE
232 bool "Use Data Cache"
235 config ARC_CACHE_PAGES
236 bool "Per Page Cache Control"
238 depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
240 This can be used to over-ride the global I/D Cache Enable on a
241 per-page basis (but only for pages accessed via MMU such as
242 Kernel Virtual address or User Virtual Address)
243 TLB entries have a per-page Cache Enable Bit.
244 Note that Global I/D ENABLE + Per Page DISABLE works but corollary
245 Global DISABLE + Per Page ENABLE won't work
247 config ARC_CACHE_VIPT_ALIASING
248 bool "Support VIPT Aliasing D$"
249 depends on ARC_HAS_DCACHE && ISA_ARCOMPACT
256 Single Cycle RAMS to store Fast Path Code
259 int "ICCM Size in KB"
261 depends on ARC_HAS_ICCM
266 Single Cycle RAMS to store Fast Path Data
269 int "DCCM Size in KB"
271 depends on ARC_HAS_DCCM
274 hex "DCCM map address"
276 depends on ARC_HAS_DCCM
280 default ARC_MMU_V3 if ARC_CPU_770
281 default ARC_MMU_V2 if ARC_CPU_750D
282 default ARC_MMU_V4 if ARC_CPU_HS
294 Fixed the deficiency of v1 - possible thrashing in memcpy scenario
295 when 2 D-TLB and 1 I-TLB entries index into same 2way set.
299 depends on ARC_CPU_770
301 Introduced with ARC700 4.10: New Features
302 Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
303 Shared Address Spaces (SASID)
315 prompt "MMU Page Size"
316 default ARC_PAGE_SIZE_8K
318 config ARC_PAGE_SIZE_8K
321 Choose between 8k vs 16k
323 config ARC_PAGE_SIZE_16K
325 depends on ARC_MMU_V3 || ARC_MMU_V4
327 config ARC_PAGE_SIZE_4K
329 depends on ARC_MMU_V3 || ARC_MMU_V4
334 prompt "MMU Super Page Size"
335 depends on ISA_ARCV2 && TRANSPARENT_HUGEPAGE
336 default ARC_HUGEPAGE_2M
338 config ARC_HUGEPAGE_2M
341 config ARC_HUGEPAGE_16M
347 int "Maximum NUMA Nodes (as a power of 2)"
348 default "0" if !DISCONTIGMEM
349 default "1" if DISCONTIGMEM
350 depends on NEED_MULTIPLE_NODES
352 Accessing memory beyond 1GB (with or w/o PAE) requires 2 memory
355 config ARC_COMPACT_IRQ_LEVELS
356 depends on ISA_ARCOMPACT
357 bool "Setup Timer IRQ as high Priority"
358 # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
361 config ARC_FPU_SAVE_RESTORE
362 bool "Enable FPU state persistence across context switch"
364 ARCompact FPU has internal registers to assist with Double precision
365 Floating Point operations. There are control and stauts registers
366 for floating point exceptions and rounding modes. These are
367 preserved across task context switch when enabled.
373 bool "Insn: LLOCK/SCOND (efficient atomic ops)"
375 depends on !ARC_CANT_LLSC
378 bool "Insn: SWAPE (endian-swap)"
383 config ARC_USE_UNALIGNED_MEM_ACCESS
384 bool "Enable unaligned access in HW"
386 select HAVE_EFFICIENT_UNALIGNED_ACCESS
388 The ARC HS architecture supports unaligned memory access
389 which is disabled by default. Enable unaligned access in
390 hardware and use software to use it
393 bool "Insn: 64bit LDD/STD"
395 Enable gcc to generate 64-bit load/store instructions
396 ISA mandates even/odd registers to allow encoding of two
397 dest operands with 2 possible source operands.
400 config ARC_HAS_DIV_REM
401 bool "Insn: div, divu, rem, remu"
404 config ARC_HAS_ACCL_REGS
405 bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6 and/or DSP)"
408 Depending on the configuration, CPU can contain accumulator reg-pair
409 (also referred to as r58:r59). These can also be used by gcc as GPR so
410 kernel needs to save/restore per process
412 config ARC_DSP_HANDLED
415 config ARC_DSP_SAVE_RESTORE_REGS
422 Depending on the configuration, CPU can contain DSP registers
423 (ACC0_GLO, ACC0_GHI, DSP_BFLY0, DSP_CTRL, DSP_FFT_CTRL).
424 Bellow is options describing how to handle these registers in
425 interrupt entry / exit and in context switch.
428 bool "No DSP extension presence in HW"
430 No DSP extension presence in HW
432 config ARC_DSP_KERNEL
433 bool "DSP extension in HW, no support for userspace"
434 select ARC_HAS_ACCL_REGS
435 select ARC_DSP_HANDLED
437 DSP extension presence in HW, no support for DSP-enabled userspace
438 applications. We don't save / restore DSP registers and only do
439 some minimal preparations so userspace won't be able to break kernel
441 config ARC_DSP_USERSPACE
442 bool "Support DSP for userspace apps"
443 select ARC_HAS_ACCL_REGS
444 select ARC_DSP_HANDLED
445 select ARC_DSP_SAVE_RESTORE_REGS
447 DSP extension presence in HW, support save / restore DSP registers to
448 run DSP-enabled userspace applications
450 config ARC_DSP_AGU_USERSPACE
451 bool "Support DSP with AGU for userspace apps"
452 select ARC_HAS_ACCL_REGS
453 select ARC_DSP_HANDLED
454 select ARC_DSP_SAVE_RESTORE_REGS
456 DSP and AGU extensions presence in HW, support save / restore DSP
457 and AGU registers to run DSP-enabled userspace applications
460 config ARC_IRQ_NO_AUTOSAVE
461 bool "Disable hardware autosave regfile on interrupts"
464 On HS cores, taken interrupt auto saves the regfile on stack.
465 This is programmable and can be optionally disabled in which case
466 software INTERRUPT_PROLOGUE/EPILGUE do the needed work
470 endmenu # "ARC CPU Configuration"
472 config LINUX_LINK_BASE
473 hex "Kernel link address"
476 ARC700 divides the 32 bit phy address space into two equal halves
477 -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
478 -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
479 Typically Linux kernel is linked at the start of untransalted addr,
480 hence the default value of 0x8zs.
481 However some customers have peripherals mapped at this addr, so
482 Linux needs to be scooted a bit.
483 If you don't know what the above means, leave this setting alone.
484 This needs to match memory start address specified in Device Tree
486 config LINUX_RAM_BASE
487 hex "RAM base address"
488 default LINUX_LINK_BASE
490 By default Linux is linked at base of RAM. However in some special
491 cases (such as HSDK), Linux can't be linked at start of DDR, hence
495 bool "High Memory Support"
496 select ARCH_DISCONTIGMEM_ENABLE
498 With ARC 2G:2G address split, only upper 2G is directly addressable by
499 kernel. Enable this to potentially allow access to rest of 2G and PAE
503 bool "Support for the 40-bit Physical Address Extension"
506 select PHYS_ADDR_T_64BIT
508 Enable access to physical memory beyond 4G, only supported on
509 ARC cores with 40 bit Physical Addressing support
511 config ARC_KVADDR_SIZE
512 int "Kernel Virtual Address Space size (MB)"
516 The kernel address space is carved out of 256MB of translated address
517 space for catering to vmalloc, modules, pkmap, fixmap. This however may
518 not suffice vmalloc requirements of a 4K CPU EZChip system. So allow
519 this to be stretched to 512 MB (by extending into the reserved
522 config ARC_CURR_IN_REG
523 bool "Dedicate Register r25 for current_task pointer"
526 This reserved Register R25 to point to Current Task in
527 kernel mode. This saves memory access for each such access
530 config ARC_EMUL_UNALIGNED
531 bool "Emulate unaligned memory access (userspace only)"
532 select SYSCTL_ARCH_UNALIGN_NO_WARN
533 select SYSCTL_ARCH_UNALIGN_ALLOW
534 depends on ISA_ARCOMPACT
536 This enables misaligned 16 & 32 bit memory access from user space.
537 Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
538 potential bugs in code
541 int "Timer Frequency"
544 config ARC_METAWARE_HLINK
545 bool "Support for Metaware debugger assisted Host access"
547 This options allows a Linux userland apps to directly access
548 host file system (open/creat/read/write etc) with help from
549 Metaware Debugger. This can come in handy for Linux-host communication
550 when there is no real usable peripheral such as EMAC.
558 config ARC_DW2_UNWIND
559 bool "Enable DWARF specific kernel stack unwind"
563 Compiles the kernel with DWARF unwind information and can be used
564 to get stack backtraces.
566 If you say Y here the resulting kernel image will be slightly larger
567 but not slower, and it will give very useful debugging information.
568 If you don't debug the kernel, you can say N, but we may not be able
569 to solve problems without frame unwind information
571 config ARC_DBG_TLB_PARANOIA
572 bool "Paranoia Checks in Low Level TLB Handlers"
574 config ARC_DBG_JUMP_LABEL
575 bool "Paranoid checks in Static Keys (jump labels) code"
576 depends on JUMP_LABEL
577 default y if STATIC_KEYS_SELFTEST
579 Enable paranoid checks and self-test of both ARC-specific and generic
580 part of static keys (jump labels) related code.
583 config ARC_BUILTIN_DTB_NAME
584 string "Built in DTB"
586 Set the name of the DTB to embed in the vmlinux binary
587 Leaving it blank selects the minimal "skeleton" dtb
589 endmenu # "ARC Architecture Configuration"
591 config FORCE_MAX_ZONEORDER
592 int "Maximum zone order"
593 default "12" if ARC_HUGEPAGE_16M
596 source "kernel/power/Kconfig"