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.
12 select ARCH_HAS_SG_CHAIN
13 select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC
14 select BUILDTIME_EXTABLE_SORT
15 select CLONE_BACKWARDS
17 select GENERIC_ATOMIC64 if !ISA_ARCV2 || !(ARC_HAS_LL64 && ARC_HAS_LLSC)
18 select GENERIC_CLOCKEVENTS
19 select GENERIC_FIND_FIRST_BIT
20 # for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP
21 select GENERIC_IRQ_SHOW
22 select GENERIC_PCI_IOMAP
23 select GENERIC_PENDING_IRQ if SMP
24 select GENERIC_SMP_IDLE_THREAD
26 select HAVE_ARCH_TRACEHOOK
27 select HAVE_FUTEX_CMPXCHG
28 select HAVE_IOREMAP_PROT
30 select HAVE_KRETPROBES
32 select HAVE_MOD_ARCH_SPECIFIC
34 select HAVE_PERF_EVENTS
35 select HANDLE_DOMAIN_IRQ
37 select MODULES_USE_ELF_RELA
40 select OF_EARLY_FLATTREE
41 select OF_RESERVED_MEM
42 select PERF_USE_VMALLOC
43 select HAVE_DEBUG_STACKOVERFLOW
44 select HAVE_GENERIC_DMA_COHERENT
45 select HAVE_KERNEL_GZIP
46 select HAVE_KERNEL_LZMA
51 config TRACE_IRQFLAGS_SUPPORT
54 config LOCKDEP_SUPPORT
57 config SCHED_OMIT_FRAME_POINTER
63 config RWSEM_GENERIC_SPINLOCK
66 config ARCH_DISCONTIGMEM_ENABLE
69 config ARCH_FLATMEM_ENABLE
78 config GENERIC_CALIBRATE_DELAY
81 config GENERIC_HWEIGHT
84 config STACKTRACE_SUPPORT
88 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
93 source "kernel/Kconfig.freezer"
95 menu "ARC Architecture Configuration"
97 menu "ARC Platform/SoC/Board"
99 source "arch/arc/plat-sim/Kconfig"
100 source "arch/arc/plat-tb10x/Kconfig"
101 source "arch/arc/plat-axs10x/Kconfig"
102 #New platform adds here
103 source "arch/arc/plat-eznps/Kconfig"
108 prompt "ARC Instruction Set"
109 default ISA_ARCOMPACT
113 select CPU_NO_EFFICIENT_FFS
115 The original ARC ISA of ARC600/700 cores
119 select ARC_TIMERS_64BIT
121 ISA for the Next Generation ARC-HS cores
125 menu "ARC CPU Configuration"
129 default ARC_CPU_770 if ISA_ARCOMPACT
130 default ARC_CPU_HS if ISA_ARCV2
138 Support for ARC750 core
144 Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
145 This core has a bunch of cool new features:
146 -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
147 Shared Address Spaces (for sharing TLB entires in MMU)
148 -Caches: New Prog Model, Region Flush
149 -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
157 Support for ARC HS38x Cores based on ARCv2 ISA
158 The notable features are:
159 - SMP configurations of upto 4 core with coherency
160 - Optional L2 Cache and IO-Coherency
161 - Revised Interrupt Architecture (multiple priorites, reg banks,
162 auto stack switch, auto regfile save/restore)
163 - MMUv4 (PIPT dcache, Huge Pages)
165 * 64bit load/store: LDD, STD
166 * Hardware assisted divide/remainder: DIV, REM
167 * Function prologue/epilogue: ENTER_S, LEAVE_S
168 * IRQ enable/disable: CLRI, SETI
169 * pop count: FFS, FLS
170 * SETcc, BMSKN, XBFU...
174 config CPU_BIG_ENDIAN
175 bool "Enable Big Endian Mode"
178 Build kernel for Big Endian Mode of ARC CPU
181 bool "Symmetric Multi-Processing"
183 select ARC_HAS_COH_CACHES if ISA_ARCV2
184 select ARC_MCIP if ISA_ARCV2
186 This enables support for systems with more than one CPU.
190 config ARC_HAS_COH_CACHES
194 int "Maximum number of CPUs (2-4096)"
198 config ARC_SMP_HALT_ON_RESET
199 bool "Enable Halt-on-reset boot mode"
200 default y if ARC_UBOOT_SUPPORT
202 In SMP configuration cores can be configured as Halt-on-reset
203 or they could all start at same time. For Halt-on-reset, non
204 masters are parked until Master kicks them so they can start of
205 at designated entry point. For other case, all jump to common
206 entry point and spin wait for Master's signal.
211 bool "ARConnect Multicore IP (MCIP) Support "
215 This IP block enables SMP in ARC-HS38 cores.
216 It provides for cross-core interrupts, multi-core debug
217 hardware semaphores, shared memory,....
220 bool "Enable Cache Support"
222 # if SMP, cache enabled ONLY if ARC implementation has cache coherency
223 depends on !SMP || ARC_HAS_COH_CACHES
227 config ARC_CACHE_LINE_SHIFT
228 int "Cache Line Length (as power of 2)"
232 Starting with ARC700 4.9, Cache line length is configurable,
233 This option specifies "N", with Line-len = 2 power N
234 So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
235 Linux only supports same line lengths for I and D caches.
237 config ARC_HAS_ICACHE
238 bool "Use Instruction Cache"
241 config ARC_HAS_DCACHE
242 bool "Use Data Cache"
245 config ARC_CACHE_PAGES
246 bool "Per Page Cache Control"
248 depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
250 This can be used to over-ride the global I/D Cache Enable on a
251 per-page basis (but only for pages accessed via MMU such as
252 Kernel Virtual address or User Virtual Address)
253 TLB entries have a per-page Cache Enable Bit.
254 Note that Global I/D ENABLE + Per Page DISABLE works but corollary
255 Global DISABLE + Per Page ENABLE won't work
257 config ARC_CACHE_VIPT_ALIASING
258 bool "Support VIPT Aliasing D$"
259 depends on ARC_HAS_DCACHE && ISA_ARCOMPACT
267 Single Cycle RAMS to store Fast Path Code
271 int "ICCM Size in KB"
273 depends on ARC_HAS_ICCM
278 Single Cycle RAMS to store Fast Path Data
282 int "DCCM Size in KB"
284 depends on ARC_HAS_DCCM
287 hex "DCCM map address"
289 depends on ARC_HAS_DCCM
293 default ARC_MMU_V3 if ARC_CPU_770
294 default ARC_MMU_V2 if ARC_CPU_750D
295 default ARC_MMU_V4 if ARC_CPU_HS
307 Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
308 when 2 D-TLB and 1 I-TLB entries index into same 2way set.
312 depends on ARC_CPU_770
314 Introduced with ARC700 4.10: New Features
315 Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
316 Shared Address Spaces (SASID)
328 prompt "MMU Page Size"
329 default ARC_PAGE_SIZE_8K
331 config ARC_PAGE_SIZE_8K
334 Choose between 8k vs 16k
336 config ARC_PAGE_SIZE_16K
338 depends on ARC_MMU_V3 || ARC_MMU_V4
340 config ARC_PAGE_SIZE_4K
342 depends on ARC_MMU_V3 || ARC_MMU_V4
347 prompt "MMU Super Page Size"
348 depends on ISA_ARCV2 && TRANSPARENT_HUGEPAGE
349 default ARC_HUGEPAGE_2M
351 config ARC_HUGEPAGE_2M
354 config ARC_HUGEPAGE_16M
360 int "Maximum NUMA Nodes (as a power of 2)"
361 default "0" if !DISCONTIGMEM
362 default "1" if DISCONTIGMEM
363 depends on NEED_MULTIPLE_NODES
365 Accessing memory beyond 1GB (with or w/o PAE) requires 2 memory
370 config ARC_COMPACT_IRQ_LEVELS
371 bool "Setup Timer IRQ as high Priority"
373 # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
376 config ARC_FPU_SAVE_RESTORE
377 bool "Enable FPU state persistence across context switch"
380 Double Precision Floating Point unit had dedictaed regs which
381 need to be saved/restored across context-switch.
382 Note that ARC FPU is overly simplistic, unlike say x86, which has
383 hardware pieces to allow software to conditionally save/restore,
384 based on actual usage of FPU by a task. Thus our implemn does
385 this for all tasks in system.
393 bool "Insn: LLOCK/SCOND (efficient atomic ops)"
395 depends on !ARC_CANT_LLSC
398 bool "Insn: SWAPE (endian-swap)"
404 bool "Insn: 64bit LDD/STD"
406 Enable gcc to generate 64-bit load/store instructions
407 ISA mandates even/odd registers to allow encoding of two
408 dest operands with 2 possible source operands.
411 config ARC_HAS_DIV_REM
412 bool "Insn: div, divu, rem, remu"
415 config ARC_NUMBER_OF_INTERRUPTS
416 int "Number of interrupts"
420 This defines the number of interrupts on the ARCv2HS core.
421 It affects the size of vector table.
422 The initial 8 IRQs are fixed (Timer, ICI etc) and although configurable
423 in hardware, it keep things simple for Linux to assume they are always
428 endmenu # "ARC CPU Configuration"
430 config LINUX_LINK_BASE
431 hex "Linux Link Address"
434 ARC700 divides the 32 bit phy address space into two equal halves
435 -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
436 -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
437 Typically Linux kernel is linked at the start of untransalted addr,
438 hence the default value of 0x8zs.
439 However some customers have peripherals mapped at this addr, so
440 Linux needs to be scooted a bit.
441 If you don't know what the above means, leave this setting alone.
442 This needs to match memory start address specified in Device Tree
445 bool "High Memory Support"
446 select ARCH_DISCONTIGMEM_ENABLE
448 With ARC 2G:2G address split, only upper 2G is directly addressable by
449 kernel. Enable this to potentially allow access to rest of 2G and PAE
453 bool "Support for the 40-bit Physical Address Extension"
457 Enable access to physical memory beyond 4G, only supported on
458 ARC cores with 40 bit Physical Addressing support
460 config ARCH_PHYS_ADDR_T_64BIT
461 def_bool ARC_HAS_PAE40
463 config ARCH_DMA_ADDR_T_64BIT
466 config ARC_PLAT_NEEDS_PHYS_TO_DMA
469 config ARC_KVADDR_SIZE
470 int "Kernel Virtaul Address Space size (MB)"
474 The kernel address space is carved out of 256MB of translated address
475 space for catering to vmalloc, modules, pkmap, fixmap. This however may
476 not suffice vmalloc requirements of a 4K CPU EZChip system. So allow
477 this to be stretched to 512 MB (by extending into the reserved
480 config ARC_CURR_IN_REG
481 bool "Dedicate Register r25 for current_task pointer"
484 This reserved Register R25 to point to Current Task in
485 kernel mode. This saves memory access for each such access
488 config ARC_EMUL_UNALIGNED
489 bool "Emulate unaligned memory access (userspace only)"
491 select SYSCTL_ARCH_UNALIGN_NO_WARN
492 select SYSCTL_ARCH_UNALIGN_ALLOW
493 depends on ISA_ARCOMPACT
495 This enables misaligned 16 & 32 bit memory access from user space.
496 Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
497 potential bugs in code
500 int "Timer Frequency"
503 config ARC_METAWARE_HLINK
504 bool "Support for Metaware debugger assisted Host access"
507 This options allows a Linux userland apps to directly access
508 host file system (open/creat/read/write etc) with help from
509 Metaware Debugger. This can come in handy for Linux-host communication
510 when there is no real usable peripheral such as EMAC.
518 config ARC_DW2_UNWIND
519 bool "Enable DWARF specific kernel stack unwind"
523 Compiles the kernel with DWARF unwind information and can be used
524 to get stack backtraces.
526 If you say Y here the resulting kernel image will be slightly larger
527 but not slower, and it will give very useful debugging information.
528 If you don't debug the kernel, you can say N, but we may not be able
529 to solve problems without frame unwind information
531 config ARC_DBG_TLB_PARANOIA
532 bool "Paranoia Checks in Low Level TLB Handlers"
537 config ARC_UBOOT_SUPPORT
538 bool "Support uboot arg Handling"
541 ARC Linux by default checks for uboot provided args as pointers to
542 external cmdline or DTB. This however breaks in absence of uboot,
543 when booting from Metaware debugger directly, as the registers are
544 not zeroed out on reset by mdb and/or ARCv2 based cores. The bogus
545 registers look like uboot args to kernel which then chokes.
546 So only enable the uboot arg checking/processing if users are sure
547 of uboot being in play.
549 config ARC_BUILTIN_DTB_NAME
550 string "Built in DTB"
552 Set the name of the DTB to embed in the vmlinux binary
553 Leaving it blank selects the minimal "skeleton" dtb
555 source "kernel/Kconfig.preempt"
557 menu "Executable file formats"
558 source "fs/Kconfig.binfmt"
561 endmenu # "ARC Architecture Configuration"
565 config FORCE_MAX_ZONEORDER
566 int "Maximum zone order"
567 default "12" if ARC_HUGEPAGE_16M
571 source "drivers/Kconfig"
576 bool "PCI support" if MIGHT_HAVE_PCI
578 PCI is the name of a bus system, i.e., the way the CPU talks to
579 the other stuff inside your box. Find out if your board/platform
582 Note: PCIe support for Synopsys Device will be available only
583 when HAPS DX is configured with PCIe RC bitmap. If you have PCI,
589 source "drivers/pci/Kconfig"
594 source "arch/arc/Kconfig.debug"
595 source "security/Kconfig"
596 source "crypto/Kconfig"
598 source "kernel/power/Kconfig"