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_MCIP if ISA_ARCV2
185 This enables support for systems with more than one CPU.
190 int "Maximum number of CPUs (2-4096)"
194 config ARC_SMP_HALT_ON_RESET
195 bool "Enable Halt-on-reset boot mode"
196 default y if ARC_UBOOT_SUPPORT
198 In SMP configuration cores can be configured as Halt-on-reset
199 or they could all start at same time. For Halt-on-reset, non
200 masters are parked until Master kicks them so they can start of
201 at designated entry point. For other case, all jump to common
202 entry point and spin wait for Master's signal.
207 bool "ARConnect Multicore IP (MCIP) Support "
211 This IP block enables SMP in ARC-HS38 cores.
212 It provides for cross-core interrupts, multi-core debug
213 hardware semaphores, shared memory,....
216 bool "Enable Cache Support"
221 config ARC_CACHE_LINE_SHIFT
222 int "Cache Line Length (as power of 2)"
226 Starting with ARC700 4.9, Cache line length is configurable,
227 This option specifies "N", with Line-len = 2 power N
228 So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
229 Linux only supports same line lengths for I and D caches.
231 config ARC_HAS_ICACHE
232 bool "Use Instruction Cache"
235 config ARC_HAS_DCACHE
236 bool "Use Data Cache"
239 config ARC_CACHE_PAGES
240 bool "Per Page Cache Control"
242 depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
244 This can be used to over-ride the global I/D Cache Enable on a
245 per-page basis (but only for pages accessed via MMU such as
246 Kernel Virtual address or User Virtual Address)
247 TLB entries have a per-page Cache Enable Bit.
248 Note that Global I/D ENABLE + Per Page DISABLE works but corollary
249 Global DISABLE + Per Page ENABLE won't work
251 config ARC_CACHE_VIPT_ALIASING
252 bool "Support VIPT Aliasing D$"
253 depends on ARC_HAS_DCACHE && ISA_ARCOMPACT
261 Single Cycle RAMS to store Fast Path Code
265 int "ICCM Size in KB"
267 depends on ARC_HAS_ICCM
272 Single Cycle RAMS to store Fast Path Data
276 int "DCCM Size in KB"
278 depends on ARC_HAS_DCCM
281 hex "DCCM map address"
283 depends on ARC_HAS_DCCM
287 default ARC_MMU_V3 if ARC_CPU_770
288 default ARC_MMU_V2 if ARC_CPU_750D
289 default ARC_MMU_V4 if ARC_CPU_HS
301 Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
302 when 2 D-TLB and 1 I-TLB entries index into same 2way set.
306 depends on ARC_CPU_770
308 Introduced with ARC700 4.10: New Features
309 Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
310 Shared Address Spaces (SASID)
322 prompt "MMU Page Size"
323 default ARC_PAGE_SIZE_8K
325 config ARC_PAGE_SIZE_8K
328 Choose between 8k vs 16k
330 config ARC_PAGE_SIZE_16K
332 depends on ARC_MMU_V3 || ARC_MMU_V4
334 config ARC_PAGE_SIZE_4K
336 depends on ARC_MMU_V3 || ARC_MMU_V4
341 prompt "MMU Super Page Size"
342 depends on ISA_ARCV2 && TRANSPARENT_HUGEPAGE
343 default ARC_HUGEPAGE_2M
345 config ARC_HUGEPAGE_2M
348 config ARC_HUGEPAGE_16M
354 int "Maximum NUMA Nodes (as a power of 2)"
355 default "0" if !DISCONTIGMEM
356 default "1" if DISCONTIGMEM
357 depends on NEED_MULTIPLE_NODES
359 Accessing memory beyond 1GB (with or w/o PAE) requires 2 memory
364 config ARC_COMPACT_IRQ_LEVELS
365 bool "Setup Timer IRQ as high Priority"
367 # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
370 config ARC_FPU_SAVE_RESTORE
371 bool "Enable FPU state persistence across context switch"
374 Double Precision Floating Point unit had dedictaed regs which
375 need to be saved/restored across context-switch.
376 Note that ARC FPU is overly simplistic, unlike say x86, which has
377 hardware pieces to allow software to conditionally save/restore,
378 based on actual usage of FPU by a task. Thus our implemn does
379 this for all tasks in system.
387 bool "Insn: LLOCK/SCOND (efficient atomic ops)"
389 depends on !ARC_CANT_LLSC
392 bool "Insn: SWAPE (endian-swap)"
398 bool "Insn: 64bit LDD/STD"
400 Enable gcc to generate 64-bit load/store instructions
401 ISA mandates even/odd registers to allow encoding of two
402 dest operands with 2 possible source operands.
405 config ARC_HAS_DIV_REM
406 bool "Insn: div, divu, rem, remu"
411 endmenu # "ARC CPU Configuration"
413 config LINUX_LINK_BASE
414 hex "Linux Link Address"
417 ARC700 divides the 32 bit phy address space into two equal halves
418 -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
419 -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
420 Typically Linux kernel is linked at the start of untransalted addr,
421 hence the default value of 0x8zs.
422 However some customers have peripherals mapped at this addr, so
423 Linux needs to be scooted a bit.
424 If you don't know what the above means, leave this setting alone.
425 This needs to match memory start address specified in Device Tree
428 bool "High Memory Support"
429 select ARCH_DISCONTIGMEM_ENABLE
431 With ARC 2G:2G address split, only upper 2G is directly addressable by
432 kernel. Enable this to potentially allow access to rest of 2G and PAE
436 bool "Support for the 40-bit Physical Address Extension"
440 Enable access to physical memory beyond 4G, only supported on
441 ARC cores with 40 bit Physical Addressing support
443 config ARCH_PHYS_ADDR_T_64BIT
444 def_bool ARC_HAS_PAE40
446 config ARCH_DMA_ADDR_T_64BIT
449 config ARC_PLAT_NEEDS_PHYS_TO_DMA
452 config ARC_KVADDR_SIZE
453 int "Kernel Virtaul Address Space size (MB)"
457 The kernel address space is carved out of 256MB of translated address
458 space for catering to vmalloc, modules, pkmap, fixmap. This however may
459 not suffice vmalloc requirements of a 4K CPU EZChip system. So allow
460 this to be stretched to 512 MB (by extending into the reserved
463 config ARC_CURR_IN_REG
464 bool "Dedicate Register r25 for current_task pointer"
467 This reserved Register R25 to point to Current Task in
468 kernel mode. This saves memory access for each such access
471 config ARC_EMUL_UNALIGNED
472 bool "Emulate unaligned memory access (userspace only)"
474 select SYSCTL_ARCH_UNALIGN_NO_WARN
475 select SYSCTL_ARCH_UNALIGN_ALLOW
476 depends on ISA_ARCOMPACT
478 This enables misaligned 16 & 32 bit memory access from user space.
479 Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
480 potential bugs in code
483 int "Timer Frequency"
486 config ARC_METAWARE_HLINK
487 bool "Support for Metaware debugger assisted Host access"
490 This options allows a Linux userland apps to directly access
491 host file system (open/creat/read/write etc) with help from
492 Metaware Debugger. This can come in handy for Linux-host communication
493 when there is no real usable peripheral such as EMAC.
501 config ARC_DW2_UNWIND
502 bool "Enable DWARF specific kernel stack unwind"
506 Compiles the kernel with DWARF unwind information and can be used
507 to get stack backtraces.
509 If you say Y here the resulting kernel image will be slightly larger
510 but not slower, and it will give very useful debugging information.
511 If you don't debug the kernel, you can say N, but we may not be able
512 to solve problems without frame unwind information
514 config ARC_DBG_TLB_PARANOIA
515 bool "Paranoia Checks in Low Level TLB Handlers"
520 config ARC_UBOOT_SUPPORT
521 bool "Support uboot arg Handling"
524 ARC Linux by default checks for uboot provided args as pointers to
525 external cmdline or DTB. This however breaks in absence of uboot,
526 when booting from Metaware debugger directly, as the registers are
527 not zeroed out on reset by mdb and/or ARCv2 based cores. The bogus
528 registers look like uboot args to kernel which then chokes.
529 So only enable the uboot arg checking/processing if users are sure
530 of uboot being in play.
532 config ARC_BUILTIN_DTB_NAME
533 string "Built in DTB"
535 Set the name of the DTB to embed in the vmlinux binary
536 Leaving it blank selects the minimal "skeleton" dtb
538 source "kernel/Kconfig.preempt"
540 menu "Executable file formats"
541 source "fs/Kconfig.binfmt"
544 endmenu # "ARC Architecture Configuration"
548 config FORCE_MAX_ZONEORDER
549 int "Maximum zone order"
550 default "12" if ARC_HUGEPAGE_16M
554 source "drivers/Kconfig"
559 bool "PCI support" if MIGHT_HAVE_PCI
561 PCI is the name of a bus system, i.e., the way the CPU talks to
562 the other stuff inside your box. Find out if your board/platform
565 Note: PCIe support for Synopsys Device will be available only
566 when HAPS DX is configured with PCIe RC bitmap. If you have PCI,
572 source "drivers/pci/Kconfig"
577 source "arch/arc/Kconfig.debug"
578 source "security/Kconfig"
579 source "crypto/Kconfig"
581 source "kernel/power/Kconfig"