blob: 956d3575426cc45f38b7ad07c2d426025415af9c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001config ARM
2 bool
3 default y
Catalin Marinas74634492012-07-30 14:41:09 -07004 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
Dan Williams21266be2015-11-19 18:19:29 -08005 select ARCH_HAS_DEVMEM_IS_ALLOWED
Kees Cook2b68f6c2015-04-14 15:48:00 -07006 select ARCH_HAS_ELF_RANDOMIZE
Mark Rutland3d067702012-10-30 12:13:42 +00007 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
Russell King171b3f02013-09-12 21:24:42 +01008 select ARCH_HAVE_CUSTOM_GPIO_H
Riku Voipio957e3fa2014-12-12 16:57:44 -08009 select ARCH_HAS_GCOV_PROFILE_ALL
Mark Salterd7018842013-10-07 22:07:58 -040010 select ARCH_MIGHT_HAVE_PC_PARPORT
Peter Zijlstra4badad32014-06-06 19:53:16 +020011 select ARCH_SUPPORTS_ATOMIC_RMW
Kim Phillips017f1612013-11-06 05:15:24 +010012 select ARCH_USE_BUILTIN_BSWAP
Will Deacon0cbad9c2013-10-09 17:19:22 +010013 select ARCH_USE_CMPXCHG_LOCKREF
Russell Kingb1b3f492012-10-06 17:12:25 +010014 select ARCH_WANT_IPC_PARSE_VERSION
Stephen Boydee951c62012-10-29 19:19:34 +010015 select BUILDTIME_EXTABLE_SORT if MMU
Russell King171b3f02013-09-12 21:24:42 +010016 select CLONE_BACKWARDS
Russell Kingb1b3f492012-10-06 17:12:25 +010017 select CPU_PM if (SUSPEND || CPU_IDLE)
Will Deacondce5c9e2013-12-17 19:50:16 +010018 select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS
Borislav Petkovb01aec92015-05-21 19:59:31 +020019 select EDAC_SUPPORT
20 select EDAC_ATOMIC_SCRUB
Laura Abbott36d0fd22014-10-09 15:26:42 -070021 select GENERIC_ALLOCATOR
Uwe Kleine-König4477ca42013-03-21 21:02:37 +010022 select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
Russell Kingb1b3f492012-10-06 17:12:25 +010023 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
Ard Biesheuvel29373672015-09-01 08:59:28 +020024 select GENERIC_EARLY_IOREMAP
Russell King171b3f02013-09-12 21:24:42 +010025 select GENERIC_IDLE_POLL_SETUP
Russell Kingb1b3f492012-10-06 17:12:25 +010026 select GENERIC_IRQ_PROBE
27 select GENERIC_IRQ_SHOW
Geert Uytterhoeven7c070052015-04-01 13:37:11 +010028 select GENERIC_IRQ_SHOW_LEVEL
Russell Kingb1b3f492012-10-06 17:12:25 +010029 select GENERIC_PCI_IOMAP
Stephen Boyd38ff87f2013-06-01 23:39:40 -070030 select GENERIC_SCHED_CLOCK
Russell Kingb1b3f492012-10-06 17:12:25 +010031 select GENERIC_SMP_IDLE_THREAD
32 select GENERIC_STRNCPY_FROM_USER
33 select GENERIC_STRNLEN_USER
Marc Zyngiera71b0922014-08-26 11:03:18 +010034 select HANDLE_DOMAIN_IRQ
Russell Kingb1b3f492012-10-06 17:12:25 +010035 select HARDIRQS_SW_RESEND
AKASHI Takahiro7a017722014-02-25 18:16:24 +090036 select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT)
Yalin Wang0b7857d2015-01-16 02:45:55 +010037 select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6
Arnd Bergmann437682ee2015-11-19 13:30:42 +010038 select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU
39 select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU
Daniel Cashmane0c25d92016-01-14 15:19:57 -080040 select HAVE_ARCH_MMAP_RND_BITS if MMU
Kees Cook91702172013-11-09 00:51:56 +010041 select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
Wade Farnsworth0693bf62012-04-04 16:19:47 +010042 select HAVE_ARCH_TRACEHOOK
Jens Wiklanderb329f952016-01-04 15:42:55 +010043 select HAVE_ARM_SMCCC if CPU_V7
Daniel Borkmann60777762016-05-13 19:08:28 +020044 select HAVE_CBPF_JIT
Russell King51aaf812014-04-22 22:26:27 +010045 select HAVE_CC_STACKPROTECTOR
Russell King171b3f02013-09-12 21:24:42 +010046 select HAVE_CONTEXT_TRACKING
Russell Kingb1b3f492012-10-06 17:12:25 +010047 select HAVE_C_RECORDMCOUNT
48 select HAVE_DEBUG_KMEMLEAK
49 select HAVE_DMA_API_DEBUG
Russell Kingb1b3f492012-10-06 17:12:25 +010050 select HAVE_DMA_CONTIGUOUS if MMU
Arnd Bergmann437682ee2015-11-19 13:30:42 +010051 select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) && !CPU_ENDIAN_BE32 && MMU
Will Deacondce5c9e2013-12-17 19:50:16 +010052 select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU
Jiri Slaby5f56a5d2016-05-20 17:00:16 -070053 select HAVE_EXIT_THREAD
Russell Kingb1b3f492012-10-06 17:12:25 +010054 select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
55 select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
56 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
57 select HAVE_GENERIC_DMA_COHERENT
Russell Kingb1b3f492012-10-06 17:12:25 +010058 select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
59 select HAVE_IDE if PCI || ISA || PCMCIA
Russell King87c46b62013-05-04 14:38:59 +010060 select HAVE_IRQ_TIME_ACCOUNTING
Russell Kingb1b3f492012-10-06 17:12:25 +010061 select HAVE_KERNEL_GZIP
Kyungsik Leef9b493a2013-07-08 16:01:48 -070062 select HAVE_KERNEL_LZ4
Russell Kingb1b3f492012-10-06 17:12:25 +010063 select HAVE_KERNEL_LZMA
64 select HAVE_KERNEL_LZO
65 select HAVE_KERNEL_XZ
Arnd Bergmanncb1293e2015-05-26 15:40:44 +010066 select HAVE_KPROBES if !XIP_KERNEL && !CPU_ENDIAN_BE32 && !CPU_V7M
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -080067 select HAVE_KRETPROBES if (HAVE_KPROBES)
Russell Kingb1b3f492012-10-06 17:12:25 +010068 select HAVE_MEMBLOCK
Ard Biesheuvel7d485f62014-11-24 16:54:35 +010069 select HAVE_MOD_ARCH_SPECIFIC
Russell Kingb1b3f492012-10-06 17:12:25 +010070 select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
Wang Nan0dc016d2015-01-09 14:37:36 +080071 select HAVE_OPTPROBES if !THUMB2_KERNEL
Jamie Iles7ada1892010-02-02 20:24:58 +010072 select HAVE_PERF_EVENTS
Will Deacon49863892013-09-26 12:36:35 +010073 select HAVE_PERF_REGS
74 select HAVE_PERF_USER_STACK_DUMP
Steve Cappera0ad5492014-10-09 15:29:18 -070075 select HAVE_RCU_TABLE_FREE if (SMP && ARM_LPAE)
Will Deacone513f8b2010-06-25 12:24:53 +010076 select HAVE_REGS_AND_STACK_ACCESS_API
Russell Kingb1b3f492012-10-06 17:12:25 +010077 select HAVE_SYSCALL_TRACEPOINTS
Catalin Marinasaf1839e2012-10-08 16:28:08 -070078 select HAVE_UID16
Kevin Hilman31c1fc82013-09-16 15:28:22 -070079 select HAVE_VIRT_CPU_ACCOUNTING_GEN
Thomas Gleixnerda0ec6f2013-08-14 20:43:17 +010080 select IRQ_FORCED_THREADING
Russell King171b3f02013-09-12 21:24:42 +010081 select MODULES_USE_ELF_REL
Santosh Shilimkar84f452b2013-06-30 00:28:46 -040082 select NO_BOOTMEM
Arnd Bergmannaa7d5f12015-11-19 13:20:54 +010083 select OF_EARLY_FLATTREE if OF
84 select OF_RESERVED_MEM if OF
Russell King171b3f02013-09-12 21:24:42 +010085 select OLD_SIGACTION
86 select OLD_SIGSUSPEND3
Russell Kingb1b3f492012-10-06 17:12:25 +010087 select PERF_USE_VMALLOC
88 select RTC_LIB
89 select SYS_SUPPORTS_APM_EMULATION
Russell King171b3f02013-09-12 21:24:42 +010090 # Above selects are sorted alphabetically; please add new ones
91 # according to that. Thanks.
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 help
93 The ARM series is a line of low-power-consumption RISC chip designs
Martin Michlmayrf6c89652006-02-08 21:09:07 +000094 licensed by ARM Ltd and targeted at embedded applications and
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
Martin Michlmayrf6c89652006-02-08 21:09:07 +000096 manufactured, but legacy ARM-based PC hardware remains popular in
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 Europe. There is an ARM Linux project with a web page at
98 <http://www.arm.linux.org.uk/>.
99
Russell King74facff2011-06-02 11:16:22 +0100100config ARM_HAS_SG_CHAIN
Laura Abbott308c09f2014-08-08 14:23:25 -0700101 select ARCH_HAS_SG_CHAIN
Russell King74facff2011-06-02 11:16:22 +0100102 bool
103
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200104config NEED_SG_DMA_LENGTH
105 bool
106
107config ARM_DMA_USE_IOMMU
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200108 bool
Russell Kingb1b3f492012-10-06 17:12:25 +0100109 select ARM_HAS_SG_CHAIN
110 select NEED_SG_DMA_LENGTH
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200111
Seung-Woo Kim60460ab2013-02-06 13:21:14 +0900112if ARM_DMA_USE_IOMMU
113
114config ARM_DMA_IOMMU_ALIGNMENT
115 int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
116 range 4 9
117 default 8
118 help
119 DMA mapping framework by default aligns all buffers to the smallest
120 PAGE_SIZE order which is greater than or equal to the requested buffer
121 size. This works well for buffers up to a few hundreds kilobytes, but
122 for larger buffers it just a waste of address space. Drivers which has
123 relatively small addressing window (like 64Mib) might run out of
124 virtual space with just a few allocations.
125
126 With this parameter you can specify the maximum PAGE_SIZE order for
127 DMA IOMMU buffers. Larger buffers will be aligned only to this
128 specified order. The order is expressed as a power of two multiplied
129 by the PAGE_SIZE.
130
131endif
132
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +0100133config MIGHT_HAVE_PCI
134 bool
135
Ralf Baechle75e71532007-02-09 17:08:58 +0000136config SYS_SUPPORTS_APM_EMULATION
137 bool
138
Linus Walleijbc581772009-09-15 17:30:37 +0100139config HAVE_TCM
140 bool
141 select GENERIC_ALLOCATOR
142
Russell Kinge119bff2010-01-10 17:23:29 +0000143config HAVE_PROC_CPU
144 bool
145
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700146config NO_IOPORT_MAP
Al Viro5ea81762007-02-11 15:41:31 +0000147 bool
Al Viro5ea81762007-02-11 15:41:31 +0000148
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149config EISA
150 bool
151 ---help---
152 The Extended Industry Standard Architecture (EISA) bus was
153 developed as an open alternative to the IBM MicroChannel bus.
154
155 The EISA bus provided some of the features of the IBM MicroChannel
156 bus while maintaining backward compatibility with cards made for
157 the older ISA bus. The EISA bus saw limited use between 1988 and
158 1995 when it was made obsolete by the PCI bus.
159
160 Say Y here if you are building a kernel for an EISA-based machine.
161
162 Otherwise, say N.
163
164config SBUS
165 bool
166
Russell Kingf16fb1e2007-04-28 09:59:37 +0100167config STACKTRACE_SUPPORT
168 bool
169 default y
170
171config LOCKDEP_SUPPORT
172 bool
173 default y
174
Russell King7ad1bcb2006-08-27 12:07:02 +0100175config TRACE_IRQFLAGS_SUPPORT
176 bool
Arnd Bergmanncb1293e2015-05-26 15:40:44 +0100177 default !CPU_V7M
Russell King7ad1bcb2006-08-27 12:07:02 +0100178
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179config RWSEM_XCHGADD_ALGORITHM
180 bool
Will Deacon8a874112014-05-02 17:06:19 +0100181 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182
David Howellsf0d1b0b2006-12-08 02:37:49 -0800183config ARCH_HAS_ILOG2_U32
184 bool
David Howellsf0d1b0b2006-12-08 02:37:49 -0800185
186config ARCH_HAS_ILOG2_U64
187 bool
David Howellsf0d1b0b2006-12-08 02:37:49 -0800188
Eduardo Valentin4a1b5732013-06-13 22:58:52 +0100189config ARCH_HAS_BANDGAP
190 bool
191
Stefan Agnera5f4c562015-08-13 00:01:52 +0100192config FIX_EARLYCON_MEM
193 def_bool y if MMU
194
Akinobu Mitab89c3b12006-03-26 01:39:19 -0800195config GENERIC_HWEIGHT
196 bool
197 default y
198
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199config GENERIC_CALIBRATE_DELAY
200 bool
201 default y
202
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100203config ARCH_MAY_HAVE_PC_FDC
204 bool
205
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800206config ZONE_DMA
207 bool
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800208
FUJITA Tomonoriccd7ab72010-03-10 15:23:23 -0800209config NEED_DMA_MAP_STATE
210 def_bool y
211
David A. Longc7edc9e2014-03-07 11:23:04 -0500212config ARCH_SUPPORTS_UPROBES
213 def_bool y
214
Rob Herring58af4a22012-03-20 14:33:01 -0500215config ARCH_HAS_DMA_SET_COHERENT_MASK
216 bool
217
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218config GENERIC_ISA_DMA
219 bool
220
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221config FIQ
222 bool
223
Rob Herring13a50452012-02-07 09:28:22 -0600224config NEED_RET_TO_USER
225 bool
226
Al Viro034d2f52005-12-19 16:27:59 -0500227config ARCH_MTD_XIP
228 bool
229
Hyok S. Choic760fc12006-03-27 15:18:50 +0100230config VECTORS_BASE
231 hex
Hyok S. Choi6afd6fa2006-09-28 21:46:34 +0900232 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
Hyok S. Choic760fc12006-03-27 15:18:50 +0100233 default DRAM_BASE if REMAP_VECTORS_TO_RAM
234 default 0x00000000
235 help
Russell King19accfd2013-07-04 11:40:32 +0100236 The base address of exception vectors. This must be two pages
237 in size.
Hyok S. Choic760fc12006-03-27 15:18:50 +0100238
Russell Kingdc21af92011-01-04 19:09:43 +0000239config ARM_PATCH_PHYS_VIRT
Russell Kingc1beced2011-08-10 10:23:45 +0100240 bool "Patch physical to virtual translations at runtime" if EMBEDDED
241 default y
Nicolas Pitreb511d752011-02-21 06:53:35 +0100242 depends on !XIP_KERNEL && MMU
Russell Kingdc21af92011-01-04 19:09:43 +0000243 help
Russell King111e9a52011-05-12 10:02:42 +0100244 Patch phys-to-virt and virt-to-phys translation functions at
245 boot and module load time according to the position of the
246 kernel in system memory.
Russell Kingdc21af92011-01-04 19:09:43 +0000247
Russell King111e9a52011-05-12 10:02:42 +0100248 This can only be used with non-XIP MMU kernels where the base
Nicolas Pitredaece592011-08-12 00:14:29 +0100249 of physical memory is at a 16MB boundary.
Russell Kingdc21af92011-01-04 19:09:43 +0000250
Russell Kingc1beced2011-08-10 10:23:45 +0100251 Only disable this option if you know that you do not require
252 this feature (eg, building a kernel for a single machine) and
253 you need to shrink the kernel to the minimal size.
254
Rob Herringc334bc12012-03-04 22:03:33 -0600255config NEED_MACH_IO_H
256 bool
257 help
258 Select this when mach/io.h is required to provide special
259 definitions for this platform. The need for mach/io.h should
260 be avoided when possible.
261
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400262config NEED_MACH_MEMORY_H
Nicolas Pitre1b9f95f2011-07-05 22:52:51 -0400263 bool
Russell King111e9a52011-05-12 10:02:42 +0100264 help
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400265 Select this when mach/memory.h is required to provide special
266 definitions for this platform. The need for mach/memory.h should
267 be avoided when possible.
Nicolas Pitre1b9f95f2011-07-05 22:52:51 -0400268
269config PHYS_OFFSET
Nicolas Pitre974c0722011-12-02 23:09:42 +0100270 hex "Physical address of main memory" if MMU
Uwe Kleine-Königc6f54a92014-07-23 20:37:43 +0100271 depends on !ARM_PATCH_PHYS_VIRT
Nicolas Pitre974c0722011-12-02 23:09:42 +0100272 default DRAM_BASE if !MMU
Uwe Kleine-Königc6f54a92014-07-23 20:37:43 +0100273 default 0x00000000 if ARCH_EBSA110 || \
Uwe Kleine-Königc6f54a92014-07-23 20:37:43 +0100274 ARCH_FOOTBRIDGE || \
275 ARCH_INTEGRATOR || \
276 ARCH_IOP13XX || \
277 ARCH_KS8695 || \
278 (ARCH_REALVIEW && !REALVIEW_HIGH_PHYS_OFFSET)
279 default 0x10000000 if ARCH_OMAP1 || ARCH_RPC
280 default 0x20000000 if ARCH_S5PV210
281 default 0x70000000 if REALVIEW_HIGH_PHYS_OFFSET
H Hartley Sweetenb8824c92015-06-15 10:35:06 -0700282 default 0xc0000000 if ARCH_SA1100
Nicolas Pitre1b9f95f2011-07-05 22:52:51 -0400283 help
284 Please provide the physical address corresponding to the
285 location of main memory in your system.
Russell Kingcada3c02011-01-04 19:39:29 +0000286
Simon Glass87e040b2011-08-16 23:44:26 +0100287config GENERIC_BUG
288 def_bool y
289 depends on BUG
290
Kirill A. Shutemov1bcad262015-04-14 15:45:42 -0700291config PGTABLE_LEVELS
292 int
293 default 3 if ARM_LPAE
294 default 2
295
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296source "init/Kconfig"
297
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700298source "kernel/Kconfig.freezer"
299
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300menu "System Type"
301
Hyok S. Choi3c427972009-07-24 12:35:00 +0100302config MMU
303 bool "MMU-based Paged Memory Management Support"
304 default y
305 help
306 Select if you want MMU-based virtualised addressing space
307 support by paged memory management. If unsure, say 'Y'.
308
Daniel Cashmane0c25d92016-01-14 15:19:57 -0800309config ARCH_MMAP_RND_BITS_MIN
310 default 8
311
312config ARCH_MMAP_RND_BITS_MAX
313 default 14 if PAGE_OFFSET=0x40000000
314 default 15 if PAGE_OFFSET=0x80000000
315 default 16
316
Russell Kingccf50e22010-03-15 19:03:06 +0000317#
318# The "ARM system type" choice list is ordered alphabetically by option
319# text. Please add new entries in the option alphabetic order.
320#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321choice
322 prompt "ARM system type"
Arnd Bergmann70722802015-12-17 17:45:47 +0100323 default ARM_SINGLE_ARMV7M if !MMU
Arnd Bergmann1420b222013-02-14 13:33:36 +0100324 default ARCH_MULTIPLATFORM if MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
Rob Herring387798b2012-09-06 13:41:12 -0500326config ARCH_MULTIPLATFORM
327 bool "Allow multiple platforms to be selected"
Russell Kingb1b3f492012-10-06 17:12:25 +0100328 depends on MMU
Rob Herringddb902c2013-11-22 09:29:37 -0600329 select ARCH_WANT_OPTIONAL_GPIOLIB
Olof Johansson42dc8362014-03-09 12:46:59 -0700330 select ARM_HAS_SG_CHAIN
Rob Herring387798b2012-09-06 13:41:12 -0500331 select ARM_PATCH_PHYS_VIRT
332 select AUTO_ZRELADDR
Rob Herring6d0add42014-04-16 08:42:13 -0500333 select CLKSRC_OF
Dinh Nguyen66314222012-07-18 16:07:18 -0600334 select COMMON_CLK
Rob Herringddb902c2013-11-22 09:29:37 -0600335 select GENERIC_CLOCKEVENTS
Will Deacon08d38be2014-05-27 23:26:35 +0100336 select MIGHT_HAVE_PCI
Rob Herring387798b2012-09-06 13:41:12 -0500337 select MULTI_IRQ_HANDLER
Dinh Nguyen66314222012-07-18 16:07:18 -0600338 select SPARSE_IRQ
339 select USE_OF
Dinh Nguyen66314222012-07-18 16:07:18 -0600340
Stefan Agner9c77bc42015-05-20 00:03:51 +0200341config ARM_SINGLE_ARMV7M
342 bool "ARMv7-M based platforms (Cortex-M0/M3/M4)"
343 depends on !MMU
344 select ARCH_WANT_OPTIONAL_GPIOLIB
345 select ARM_NVIC
Stefan Agner499f1642015-05-21 00:35:44 +0200346 select AUTO_ZRELADDR
Stefan Agner9c77bc42015-05-20 00:03:51 +0200347 select CLKSRC_OF
348 select COMMON_CLK
349 select CPU_V7M
350 select GENERIC_CLOCKEVENTS
351 select NO_IOPORT_MAP
352 select SPARSE_IRQ
353 select USE_OF
354
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100355
Russell King93e22562012-10-12 14:20:52 +0100356config ARCH_CLPS711X
357 bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +0400358 select ARCH_REQUIRE_GPIOLIB
Alexander Shiyanea7d1bc2012-11-17 17:57:11 +0400359 select AUTO_ZRELADDR
Alexander Shiyanc99f72a2013-05-13 21:07:32 +0400360 select CLKSRC_MMIO
Russell King93e22562012-10-12 14:20:52 +0100361 select COMMON_CLK
362 select CPU_ARM720T
Alexander Shiyan4a8355c2012-10-10 19:45:27 +0400363 select GENERIC_CLOCKEVENTS
Alexander Shiyan65976192013-05-13 21:07:36 +0400364 select MFD_SYSCON
Alexander Shiyane4e3a372014-08-19 16:31:15 +0400365 select SOC_BUS
Russell King93e22562012-10-12 14:20:52 +0100366 help
367 Support for Cirrus Logic 711x/721x/731x based boards.
368
Russell King788c9702009-04-26 14:21:59 +0100369config ARCH_GEMINI
370 bool "Cortina Systems Gemini"
Russell King788c9702009-04-26 14:21:59 +0100371 select ARCH_REQUIRE_GPIOLIB
Linus Walleijf3372c02013-10-01 12:57:20 +0200372 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100373 select CPU_FA526
Linus Walleijf3372c02013-10-01 12:57:20 +0200374 select GENERIC_CLOCKEVENTS
Russell King788c9702009-04-26 14:21:59 +0100375 help
376 Support for the Cortina Systems Gemini family SoCs
377
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378config ARCH_EBSA110
379 bool "EBSA-110"
Russell Kingb1b3f492012-10-06 17:12:25 +0100380 select ARCH_USES_GETTIMEOFFSET
Russell Kingc7508152008-10-26 10:55:14 +0000381 select CPU_SA110
Russell Kingf7e68bb2005-05-05 14:49:01 +0100382 select ISA
Rob Herringc334bc12012-03-04 22:03:33 -0600383 select NEED_MACH_IO_H
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400384 select NEED_MACH_MEMORY_H
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700385 select NO_IOPORT_MAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 help
387 This is an evaluation board for the StrongARM processor available
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000388 from Digital. It has limited hardware on-board, including an
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 Ethernet interface, two PCMCIA sockets, two serial ports and a
390 parallel port.
391
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000392config ARCH_EP93XX
393 bool "EP93xx-based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100394 select ARCH_HAS_HOLES_MEMORYMODEL
395 select ARCH_REQUIRE_GPIOLIB
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000396 select ARM_AMBA
H Hartley Sweetenb8824c92015-06-15 10:35:06 -0700397 select ARM_PATCH_PHYS_VIRT
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000398 select ARM_VIC
H Hartley Sweetenb8824c92015-06-15 10:35:06 -0700399 select AUTO_ZRELADDR
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100400 select CLKDEV_LOOKUP
Linus Walleij000bc172015-06-15 14:34:03 +0200401 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100402 select CPU_ARM920T
Linus Walleij000bc172015-06-15 14:34:03 +0200403 select GENERIC_CLOCKEVENTS
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000404 help
405 This enables support for the Cirrus EP93xx series of CPUs.
406
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407config ARCH_FOOTBRIDGE
408 bool "FootBridge"
Russell Kingc7508152008-10-26 10:55:14 +0000409 select CPU_SA110
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 select FOOTBRIDGE
Russell King4e8d7632011-01-28 21:00:39 +0000411 select GENERIC_CLOCKEVENTS
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200412 select HAVE_IDE
Rob Herring8ef6e622012-03-01 20:48:12 -0600413 select NEED_MACH_IO_H if !MMU
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400414 select NEED_MACH_MEMORY_H
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000415 help
416 Support for systems based on the DC21285 companion chip
417 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100419config ARCH_NETX
420 bool "Hilscher NetX based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100421 select ARM_VIC
Russell King234b6ced2011-05-08 14:09:47 +0100422 select CLKSRC_MMIO
Russell Kingc7508152008-10-26 10:55:14 +0000423 select CPU_ARM926T
Uwe Kleine-König2fcfe6b2008-12-09 21:57:24 +0100424 select GENERIC_CLOCKEVENTS
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000425 help
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100426 This enables support for systems based on the Hilscher NetX Soc
427
Russell King3b938be2007-05-12 11:25:44 +0100428config ARCH_IOP13XX
429 bool "IOP13xx-based"
430 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100431 select CPU_XSC3
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400432 select NEED_MACH_MEMORY_H
Rob Herring13a50452012-02-07 09:28:22 -0600433 select NEED_RET_TO_USER
Russell Kingb1b3f492012-10-06 17:12:25 +0100434 select PCI
435 select PLAT_IOP
436 select VMSPLIT_1G
Thomas Gleixner37ebbcf2014-05-07 15:44:04 +0000437 select SPARSE_IRQ
Russell King3b938be2007-05-12 11:25:44 +0100438 help
439 Support for Intel's IOP13XX (XScale) family of processors.
440
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100441config ARCH_IOP32X
442 bool "IOP32x-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100443 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100444 select ARCH_REQUIRE_GPIOLIB
Russell Kingc7508152008-10-26 10:55:14 +0000445 select CPU_XSCALE
Linus Walleije9004f52013-09-09 11:59:51 +0200446 select GPIO_IOP
Rob Herring13a50452012-02-07 09:28:22 -0600447 select NEED_RET_TO_USER
Russell Kingf7e68bb2005-05-05 14:49:01 +0100448 select PCI
Russell Kingb1b3f492012-10-06 17:12:25 +0100449 select PLAT_IOP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000450 help
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100451 Support for Intel's 80219 and IOP32X (XScale) family of
452 processors.
453
454config ARCH_IOP33X
455 bool "IOP33x-based"
456 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100457 select ARCH_REQUIRE_GPIOLIB
Russell Kingc7508152008-10-26 10:55:14 +0000458 select CPU_XSCALE
Linus Walleije9004f52013-09-09 11:59:51 +0200459 select GPIO_IOP
Rob Herring13a50452012-02-07 09:28:22 -0600460 select NEED_RET_TO_USER
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100461 select PCI
Russell Kingb1b3f492012-10-06 17:12:25 +0100462 select PLAT_IOP
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100463 help
464 Support for Intel's IOP33X (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465
Russell King3b938be2007-05-12 11:25:44 +0100466config ARCH_IXP4XX
467 bool "IXP4xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100468 depends on MMU
Rob Herring58af4a22012-03-20 14:33:01 -0500469 select ARCH_HAS_DMA_SET_COHERENT_MASK
Russell Kingb1b3f492012-10-06 17:12:25 +0100470 select ARCH_REQUIRE_GPIOLIB
Russell King51aaf812014-04-22 22:26:27 +0100471 select ARCH_SUPPORTS_BIG_ENDIAN
Russell King234b6ced2011-05-08 14:09:47 +0100472 select CLKSRC_MMIO
Russell Kingc7508152008-10-26 10:55:14 +0000473 select CPU_XSCALE
Russell Kingb1b3f492012-10-06 17:12:25 +0100474 select DMABOUNCE if PCI
Russell King3b938be2007-05-12 11:25:44 +0100475 select GENERIC_CLOCKEVENTS
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +0100476 select MIGHT_HAVE_PCI
Rob Herringc334bc12012-03-04 22:03:33 -0600477 select NEED_MACH_IO_H
Florian Fainelli9296d942013-04-09 14:29:26 +0200478 select USB_EHCI_BIG_ENDIAN_DESC
Russell King171b3f02013-09-12 21:24:42 +0100479 select USB_EHCI_BIG_ENDIAN_MMIO
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100480 help
Russell King3b938be2007-05-12 11:25:44 +0100481 Support for Intel's IXP4XX (XScale) family of processors.
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100482
Saeed Bisharaedabd382009-08-06 15:12:43 +0300483config ARCH_DOVE
484 bool "Marvell Dove"
Saeed Bisharaedabd382009-08-06 15:12:43 +0300485 select ARCH_REQUIRE_GPIOLIB
Sebastian Hesselbarth756b2532013-05-02 19:56:12 +0100486 select CPU_PJ4
Saeed Bisharaedabd382009-08-06 15:12:43 +0300487 select GENERIC_CLOCKEVENTS
Russell King0f81bd42012-09-09 20:34:13 +0100488 select MIGHT_HAVE_PCI
Arnd Bergmannb8cd3372015-12-02 22:27:04 +0100489 select MULTI_IRQ_HANDLER
Russell King171b3f02013-09-12 21:24:42 +0100490 select MVEBU_MBUS
Sebastian Hesselbarth9139acd2012-11-19 10:39:55 +0100491 select PINCTRL
492 select PINCTRL_DOVE
Thomas Petazzoniabcda1d2012-09-11 14:27:27 +0200493 select PLAT_ORION_LEGACY
Arnd Bergmann5cdbe5d2015-12-02 22:27:05 +0100494 select SPARSE_IRQ
Russell Kingc5d431e2015-12-08 10:58:09 +0000495 select PM_GENERIC_DOMAINS if PM
Saeed Bisharaedabd382009-08-06 15:12:43 +0300496 help
497 Support for the Marvell Dove SoC 88AP510
498
Andrew Victorc53c9cf2007-05-11 21:01:28 +0100499config ARCH_KS8695
500 bool "Micrel/Kendin KS8695"
Hartley Sweeten98830bc2010-05-17 17:18:10 +0100501 select ARCH_REQUIRE_GPIOLIB
Linus Walleijc7e783d2012-08-29 20:27:22 +0200502 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100503 select CPU_ARM922T
Linus Walleijc7e783d2012-08-29 20:27:22 +0200504 select GENERIC_CLOCKEVENTS
Russell Kingb1b3f492012-10-06 17:12:25 +0100505 select NEED_MACH_MEMORY_H
Andrew Victorc53c9cf2007-05-11 21:01:28 +0100506 help
507 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
508 System-on-Chip devices.
509
Russell King788c9702009-04-26 14:21:59 +0100510config ARCH_W90X900
511 bool "Nuvoton W90X900 CPU"
wanzongshunc52d3d62009-06-10 15:49:32 +0100512 select ARCH_REQUIRE_GPIOLIB
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100513 select CLKDEV_LOOKUP
Russell King6fa5d5f2011-05-08 15:34:39 +0100514 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100515 select CPU_ARM926T
wanzongshun58b53692009-08-14 15:36:44 +0100516 select GENERIC_CLOCKEVENTS
Lennert Buytenhek777f9be2008-06-22 22:45:02 +0200517 help
wanzongshuna8bc4ea2009-08-14 15:38:29 +0100518 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
519 At present, the w90x900 has been renamed nuc900, regarding
520 the ARM series product line, you can login the following
521 link address to know more.
522
523 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
524 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
Tzachi Perelstein585cf172007-10-23 15:14:41 -0400525
Russell King93e22562012-10-12 14:20:52 +0100526config ARCH_LPC32XX
527 bool "NXP LPC32XX"
528 select ARCH_REQUIRE_GPIOLIB
529 select ARM_AMBA
Russell King40737232011-01-06 22:32:52 +0000530 select CLKDEV_LOOKUP
Vladimir Zapolskiyc227f122015-11-20 03:05:10 +0200531 select CLKSRC_LPC32XX
532 select COMMON_CLK
Russell King93e22562012-10-12 14:20:52 +0100533 select CPU_ARM926T
534 select GENERIC_CLOCKEVENTS
Vladimir Zapolskiy8cb17b52016-04-25 04:00:38 +0300535 select MULTI_IRQ_HANDLER
536 select SPARSE_IRQ
Russell King93e22562012-10-12 14:20:52 +0100537 select USE_OF
538 help
539 Support for the NXP LPC32XX family of processors
540
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541config ARCH_PXA
eric miao2c8086a2007-09-11 19:13:17 -0700542 bool "PXA2xx/PXA3xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100543 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100544 select ARCH_MTD_XIP
545 select ARCH_REQUIRE_GPIOLIB
546 select ARM_CPU_SUSPEND if PM
547 select AUTO_ZRELADDR
Robert Jarzmika1c0a6a2015-02-07 22:54:03 +0100548 select COMMON_CLK
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100549 select CLKDEV_LOOKUP
Daniel Lezcano389d9b52015-10-09 15:48:38 +0200550 select CLKSRC_PXA
Russell King234b6ced2011-05-08 14:09:47 +0100551 select CLKSRC_MMIO
Robert Jarzmik6f6caea2014-07-14 18:52:03 +0200552 select CLKSRC_OF
Arnd Bergmann2f202862016-01-29 15:06:29 +0100553 select CPU_XSCALE if !CPU_XSC3
Eric Miao981d0f32007-07-24 01:22:43 +0100554 select GENERIC_CLOCKEVENTS
Haojian Zhuang157d2642011-10-17 20:37:52 +0800555 select GPIO_PXA
Russell Kingb1b3f492012-10-06 17:12:25 +0100556 select HAVE_IDE
Robert Jarzmikd6cf30c2015-02-14 22:41:56 +0100557 select IRQ_DOMAIN
Russell Kingb1b3f492012-10-06 17:12:25 +0100558 select MULTI_IRQ_HANDLER
Eric Miaobd5ce432009-01-20 12:06:01 +0800559 select PLAT_PXA
Haojian Zhuang6ac6b812010-08-20 15:23:59 +0800560 select SPARSE_IRQ
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000561 help
eric miao2c8086a2007-09-11 19:13:17 -0700562 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563
564config ARCH_RPC
565 bool "RiscPC"
Russell King868e87c2015-09-28 10:31:50 +0100566 depends on MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 select ARCH_ACORN
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100568 select ARCH_MAY_HAVE_PC_FDC
Russell King07f841b2008-10-01 17:11:06 +0100569 select ARCH_SPARSEMEM_ENABLE
John Stultz5cfc8ee2010-03-24 00:22:36 +0000570 select ARCH_USES_GETTIMEOFFSET
Arnd Bergmannfa04e202014-02-26 17:39:12 +0100571 select CPU_SA110
Russell Kingb1b3f492012-10-06 17:12:25 +0100572 select FIQ
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200573 select HAVE_IDE
Russell Kingb1b3f492012-10-06 17:12:25 +0100574 select HAVE_PATA_PLATFORM
575 select ISA_DMA_API
Rob Herringc334bc12012-03-04 22:03:33 -0600576 select NEED_MACH_IO_H
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400577 select NEED_MACH_MEMORY_H
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700578 select NO_IOPORT_MAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 help
580 On the Acorn Risc-PC, Linux can support the internal IDE disk and
581 CD-ROM interface, serial and parallel port, and the floppy drive.
582
583config ARCH_SA1100
584 bool "SA1100-based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100585 select ARCH_MTD_XIP
Michael Buesch7444a722008-07-25 01:46:11 -0700586 select ARCH_REQUIRE_GPIOLIB
Russell Kingb1b3f492012-10-06 17:12:25 +0100587 select ARCH_SPARSEMEM_ENABLE
588 select CLKDEV_LOOKUP
589 select CLKSRC_MMIO
Daniel Lezcano389d9b52015-10-09 15:48:38 +0200590 select CLKSRC_PXA
591 select CLKSRC_OF if OF
Russell Kingb1b3f492012-10-06 17:12:25 +0100592 select CPU_FREQ
593 select CPU_SA1100
594 select GENERIC_CLOCKEVENTS
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200595 select HAVE_IDE
Dmitry Eremin-Solenikov1eca42b2014-11-28 15:56:54 +0100596 select IRQ_DOMAIN
Russell Kingb1b3f492012-10-06 17:12:25 +0100597 select ISA
Dmitry Eremin-Solenikovaffcab32014-11-28 15:55:16 +0100598 select MULTI_IRQ_HANDLER
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400599 select NEED_MACH_MEMORY_H
Russell King375dec92012-02-23 14:29:33 +0100600 select SPARSE_IRQ
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000601 help
602 Support for StrongARM 11x0 based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900604config ARCH_S3C24XX
605 bool "Samsung S3C24XX SoCs"
Kukjin Kim53650432013-04-04 09:04:30 +0900606 select ARCH_REQUIRE_GPIOLIB
Arnd Bergmann335cce72014-03-13 14:11:16 +0100607 select ATAGS
Russell Kingb1b3f492012-10-06 17:12:25 +0100608 select CLKDEV_LOOKUP
Tomasz Figa42805062013-04-28 02:25:01 +0200609 select CLKSRC_SAMSUNG_PWM
Romain Naour7f78b6e2013-01-09 18:47:04 -0800610 select GENERIC_CLOCKEVENTS
Tomasz Figa880cf072013-06-19 01:22:20 +0900611 select GPIO_SAMSUNG
Kukjin Kim20676c12010-11-13 16:08:32 +0900612 select HAVE_S3C2410_I2C if I2C
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900613 select HAVE_S3C2410_WATCHDOG if WATCHDOG
Russell Kingb1b3f492012-10-06 17:12:25 +0100614 select HAVE_S3C_RTC if RTC_CLASS
Heiko Stuebner17453dd2013-03-07 12:38:25 +0900615 select MULTI_IRQ_HANDLER
Rob Herringc334bc12012-03-04 22:03:33 -0600616 select NEED_MACH_IO_H
Tomasz Figacd8dc7a2013-06-15 09:01:49 +0900617 select SAMSUNG_ATAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 help
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900619 Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
620 and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
621 (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
622 Samsung SMDK2410 development board (and derivatives).
Ben Dooks63b1f512010-04-30 16:32:26 +0900623
Kevin Hilman7c6337e2007-04-30 19:37:19 +0100624config ARCH_DAVINCI
625 bool "TI DaVinci"
Russell Kingb1b3f492012-10-06 17:12:25 +0100626 select ARCH_HAS_HOLES_MEMORYMODEL
David Brownelldce11152008-09-07 23:41:04 -0700627 select ARCH_REQUIRE_GPIOLIB
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100628 select CLKDEV_LOOKUP
Arnd Bergmannce32c5c2016-02-01 21:35:57 +0100629 select CPU_ARM926T
David Brownell20e99692009-05-07 09:31:42 -0700630 select GENERIC_ALLOCATOR
Russell Kingb1b3f492012-10-06 17:12:25 +0100631 select GENERIC_CLOCKEVENTS
Russell Kingdc7ad3b2011-05-22 10:01:21 +0100632 select GENERIC_IRQ_CHIP
Russell Kingb1b3f492012-10-06 17:12:25 +0100633 select HAVE_IDE
Sekhar Nori689e3312012-08-28 15:27:52 +0530634 select USE_OF
Russell Kingb1b3f492012-10-06 17:12:25 +0100635 select ZONE_DMA
Kevin Hilman7c6337e2007-04-30 19:37:19 +0100636 help
637 Support for TI's DaVinci platform.
638
Tony Lindgrena0694862013-01-11 11:24:20 -0800639config ARCH_OMAP1
640 bool "TI OMAP1"
Arnd Bergmann00a36692012-06-07 18:50:51 -0600641 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100642 select ARCH_HAS_HOLES_MEMORYMODEL
Tony Lindgrena0694862013-01-11 11:24:20 -0800643 select ARCH_OMAP
Alexey Charkov21f47fb2010-12-23 13:11:21 +0100644 select ARCH_REQUIRE_GPIOLIB
Tony Priske9a91de2012-08-03 21:00:06 +1200645 select CLKDEV_LOOKUP
viresh kumarcee37e52010-04-01 12:31:05 +0100646 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100647 select GENERIC_CLOCKEVENTS
Tony Lindgrena0694862013-01-11 11:24:20 -0800648 select GENERIC_IRQ_CHIP
Tony Lindgrena0694862013-01-11 11:24:20 -0800649 select HAVE_IDE
650 select IRQ_DOMAIN
Tony Lindgrenb6943312015-05-20 09:01:21 -0700651 select MULTI_IRQ_HANDLER
Tony Lindgrena0694862013-01-11 11:24:20 -0800652 select NEED_MACH_IO_H if PCCARD
653 select NEED_MACH_MEMORY_H
Tony Lindgren685e2d02015-05-20 09:01:21 -0700654 select SPARSE_IRQ
Alexey Charkov21f47fb2010-12-23 13:11:21 +0100655 help
Tony Lindgrena0694862013-01-11 11:24:20 -0800656 Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
Binghua Duan02c981c2011-07-08 17:40:12 +0800657
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658endchoice
659
Rob Herring387798b2012-09-06 13:41:12 -0500660menu "Multiple platform selection"
661 depends on ARCH_MULTIPLATFORM
662
663comment "CPU Core family selection"
664
Arnd Bergmannf8afae42014-03-25 22:19:00 +0100665config ARCH_MULTI_V4
666 bool "ARMv4 based platforms (FA526)"
667 depends on !ARCH_MULTI_V6_V7
668 select ARCH_MULTI_V4_V5
669 select CPU_FA526
670
Rob Herring387798b2012-09-06 13:41:12 -0500671config ARCH_MULTI_V4T
672 bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
Rob Herring387798b2012-09-06 13:41:12 -0500673 depends on !ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100674 select ARCH_MULTI_V4_V5
Arnd Bergmann24e860f2013-06-03 15:38:58 +0200675 select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
676 CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
677 CPU_ARM925T || CPU_ARM940T)
Rob Herring387798b2012-09-06 13:41:12 -0500678
679config ARCH_MULTI_V5
680 bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
Rob Herring387798b2012-09-06 13:41:12 -0500681 depends on !ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100682 select ARCH_MULTI_V4_V5
Andrew Lunn12567bb2014-02-22 20:14:54 +0100683 select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \
Arnd Bergmann24e860f2013-06-03 15:38:58 +0200684 CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
685 CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
Rob Herring387798b2012-09-06 13:41:12 -0500686
687config ARCH_MULTI_V4_V5
688 bool
689
690config ARCH_MULTI_V6
Stephen Boyd8dda05c2013-03-04 15:19:19 -0800691 bool "ARMv6 based platforms (ARM11)"
Rob Herring387798b2012-09-06 13:41:12 -0500692 select ARCH_MULTI_V6_V7
Rob Herring42f47542014-01-31 14:26:04 -0600693 select CPU_V6K
Rob Herring387798b2012-09-06 13:41:12 -0500694
695config ARCH_MULTI_V7
Stephen Boyd8dda05c2013-03-04 15:19:19 -0800696 bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
Rob Herring387798b2012-09-06 13:41:12 -0500697 default y
698 select ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100699 select CPU_V7
Rob Herring90bc8ac2014-01-31 15:32:02 -0600700 select HAVE_SMP
Rob Herring387798b2012-09-06 13:41:12 -0500701
702config ARCH_MULTI_V6_V7
703 bool
Rob Herring9352b052014-01-31 15:36:10 -0600704 select MIGHT_HAVE_CACHE_L2X0
Rob Herring387798b2012-09-06 13:41:12 -0500705
706config ARCH_MULTI_CPU_AUTO
707 def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
708 select ARCH_MULTI_V5
709
710endmenu
711
Rob Herring05e2a3d2013-12-05 10:04:54 -0600712config ARCH_VIRT
Masahiro Yamadae3246542015-11-16 12:06:10 +0900713 bool "Dummy Virtual Machine"
714 depends on ARCH_MULTI_V7
Rob Herring4b8b5f22013-12-05 10:10:34 -0600715 select ARM_AMBA
Rob Herring05e2a3d2013-12-05 10:04:54 -0600716 select ARM_GIC
Pavel Fedin0e2f91e2015-11-27 12:56:26 +0100717 select ARM_GIC_V2M if PCI_MSI
Jean-Philippe Brucker0b28f1d2015-10-01 13:47:18 +0100718 select ARM_GIC_V3
Rob Herring05e2a3d2013-12-05 10:04:54 -0600719 select ARM_PSCI
Rob Herring4b8b5f22013-12-05 10:10:34 -0600720 select HAVE_ARM_ARCH_TIMER
Rob Herring05e2a3d2013-12-05 10:04:54 -0600721
Russell Kingccf50e22010-03-15 19:03:06 +0000722#
723# This is sorted alphabetically by mach-* pathname. However, plat-*
724# Kconfigs may be included either alphabetically (according to the
725# plat- suffix) or along side the corresponding mach-* source.
726#
Gregory CLEMENT3e93a222012-06-04 18:38:56 +0200727source "arch/arm/mach-mvebu/Kconfig"
728
Tsahee Zidenberg445d9b32015-03-12 13:53:00 +0200729source "arch/arm/mach-alpine/Kconfig"
730
Lars Persson590b4602016-02-11 17:06:19 +0100731source "arch/arm/mach-artpec/Kconfig"
732
Oleksij Rempeld9bfc862014-11-24 12:08:27 +0100733source "arch/arm/mach-asm9260/Kconfig"
734
Russell King95b8f202010-01-14 11:43:54 +0000735source "arch/arm/mach-at91/Kconfig"
736
Anders Berg1d22924e2014-05-23 11:08:35 +0200737source "arch/arm/mach-axxia/Kconfig"
738
Christian Daudt8ac49e02012-11-19 09:46:10 -0800739source "arch/arm/mach-bcm/Kconfig"
740
Sebastian Hesselbarth1c37fa12013-09-09 14:36:19 +0200741source "arch/arm/mach-berlin/Kconfig"
742
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743source "arch/arm/mach-clps711x/Kconfig"
744
Anton Vorontsovd94f9442010-03-25 17:12:41 +0300745source "arch/arm/mach-cns3xxx/Kconfig"
746
Russell King95b8f202010-01-14 11:43:54 +0000747source "arch/arm/mach-davinci/Kconfig"
748
Baruch Siachdf8d7422015-01-14 10:40:30 +0200749source "arch/arm/mach-digicolor/Kconfig"
750
Russell King95b8f202010-01-14 11:43:54 +0000751source "arch/arm/mach-dove/Kconfig"
752
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000753source "arch/arm/mach-ep93xx/Kconfig"
754
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755source "arch/arm/mach-footbridge/Kconfig"
756
Paulius Zaleckas59d3a192009-03-26 10:06:08 +0200757source "arch/arm/mach-gemini/Kconfig"
758
Rob Herring387798b2012-09-06 13:41:12 -0500759source "arch/arm/mach-highbank/Kconfig"
760
Haojian Zhuang389ee0c2013-12-20 10:52:56 +0800761source "arch/arm/mach-hisi/Kconfig"
762
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763source "arch/arm/mach-integrator/Kconfig"
764
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100765source "arch/arm/mach-iop32x/Kconfig"
766
767source "arch/arm/mach-iop33x/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768
Dan Williams285f5fa2006-12-07 02:59:39 +0100769source "arch/arm/mach-iop13xx/Kconfig"
770
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771source "arch/arm/mach-ixp4xx/Kconfig"
772
Santosh Shilimkar828989a2013-06-10 11:27:13 -0400773source "arch/arm/mach-keystone/Kconfig"
774
Russell King95b8f202010-01-14 11:43:54 +0000775source "arch/arm/mach-ks8695/Kconfig"
776
Carlo Caione3b8f5032014-09-10 22:16:59 +0200777source "arch/arm/mach-meson/Kconfig"
778
Jonas Jensen17723fd32013-12-18 13:58:45 +0100779source "arch/arm/mach-moxart/Kconfig"
780
Joel Stanley8c2ed9b2016-03-21 17:22:31 +1030781source "arch/arm/mach-aspeed/Kconfig"
782
Stanislav Samsonov794d15b2008-06-22 22:45:10 +0200783source "arch/arm/mach-mv78xx0/Kconfig"
784
Shawn Guo3995eb82012-09-13 19:48:07 +0800785source "arch/arm/mach-imx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786
Matthias Bruggerf682a212014-05-13 01:06:13 +0200787source "arch/arm/mach-mediatek/Kconfig"
788
Shawn Guo1d3f33d2010-12-13 20:55:03 +0800789source "arch/arm/mach-mxs/Kconfig"
790
Russell King95b8f202010-01-14 11:43:54 +0000791source "arch/arm/mach-netx/Kconfig"
Eric Miao49cbe782009-01-20 14:15:18 +0800792
Russell King95b8f202010-01-14 11:43:54 +0000793source "arch/arm/mach-nomadik/Kconfig"
Russell King95b8f202010-01-14 11:43:54 +0000794
Daniel Tang9851ca52013-06-11 18:40:17 +1000795source "arch/arm/mach-nspire/Kconfig"
796
Tony Lindgrend48af152005-07-10 19:58:17 +0100797source "arch/arm/plat-omap/Kconfig"
798
799source "arch/arm/mach-omap1/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800
Tony Lindgren1dbae812005-11-10 14:26:51 +0000801source "arch/arm/mach-omap2/Kconfig"
802
Lennert Buytenhek9dd0b192008-03-27 14:51:41 -0400803source "arch/arm/mach-orion5x/Kconfig"
Tzachi Perelstein585cf172007-10-23 15:14:41 -0400804
Rob Herring387798b2012-09-06 13:41:12 -0500805source "arch/arm/mach-picoxcell/Kconfig"
806
Russell King95b8f202010-01-14 11:43:54 +0000807source "arch/arm/mach-pxa/Kconfig"
808source "arch/arm/plat-pxa/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809
Russell King95b8f202010-01-14 11:43:54 +0000810source "arch/arm/mach-mmp/Kconfig"
811
Neil Armstrong8c9184b2016-03-03 10:42:15 +0100812source "arch/arm/mach-oxnas/Kconfig"
813
Kumar Gala8fc1b0f2014-01-21 17:14:10 -0600814source "arch/arm/mach-qcom/Kconfig"
815
Russell King95b8f202010-01-14 11:43:54 +0000816source "arch/arm/mach-realview/Kconfig"
817
Heiko Stuebnerd63dc052013-06-02 23:09:41 +0200818source "arch/arm/mach-rockchip/Kconfig"
819
Russell King95b8f202010-01-14 11:43:54 +0000820source "arch/arm/mach-sa1100/Kconfig"
Saeed Bisharaedabd382009-08-06 15:12:43 +0300821
Rob Herring387798b2012-09-06 13:41:12 -0500822source "arch/arm/mach-socfpga/Kconfig"
823
Arnd Bergmanna7ed0992012-12-02 15:12:47 +0100824source "arch/arm/mach-spear/Kconfig"
Ben Dooksa21765a2007-02-11 18:31:01 +0100825
Srinivas Kandagatla65ebcc12013-06-25 12:15:10 +0100826source "arch/arm/mach-sti/Kconfig"
827
Kukjin Kim85fd6d62012-02-06 09:38:19 +0900828source "arch/arm/mach-s3c24xx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829
Ben Dooks431107e2010-01-26 10:11:04 +0900830source "arch/arm/mach-s3c64xx/Kconfig"
Ben Dooksa08ab632008-10-21 14:06:39 +0100831
Kukjin Kim170f4e42010-02-24 16:40:44 +0900832source "arch/arm/mach-s5pv210/Kconfig"
833
Kukjin Kim83014572011-11-06 13:54:56 +0900834source "arch/arm/mach-exynos/Kconfig"
Rob Herringe509b282014-06-10 09:06:09 -0500835source "arch/arm/plat-samsung/Kconfig"
Changhwan Youncc0e72b2010-07-16 12:15:38 +0900836
Russell King882d01f2010-03-02 23:40:15 +0000837source "arch/arm/mach-shmobile/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838
Maxime Ripard3b526342012-11-08 12:40:16 +0100839source "arch/arm/mach-sunxi/Kconfig"
840
Barry Song156a0992012-08-23 13:41:58 +0800841source "arch/arm/mach-prima2/Kconfig"
842
Marc Gonzalezd6de5b02015-12-15 10:41:13 +0100843source "arch/arm/mach-tango/Kconfig"
844
Erik Gillingc5f80062010-01-21 16:53:02 -0800845source "arch/arm/mach-tegra/Kconfig"
846
Russell King95b8f202010-01-14 11:43:54 +0000847source "arch/arm/mach-u300/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848
Masahiro Yamadaba56a982015-05-08 13:07:11 +0900849source "arch/arm/mach-uniphier/Kconfig"
850
Russell King95b8f202010-01-14 11:43:54 +0000851source "arch/arm/mach-ux500/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852
853source "arch/arm/mach-versatile/Kconfig"
854
Russell Kingceade892010-02-11 21:44:53 +0000855source "arch/arm/mach-vexpress/Kconfig"
Russell King420c34e2011-01-18 20:08:06 +0000856source "arch/arm/plat-versatile/Kconfig"
Russell Kingceade892010-02-11 21:44:53 +0000857
Tony Prisk6f35f9a2012-10-11 20:13:09 +1300858source "arch/arm/mach-vt8500/Kconfig"
859
wanzongshun7ec80dd2008-12-03 03:55:38 +0100860source "arch/arm/mach-w90x900/Kconfig"
861
Jun Nieacede512015-04-28 17:18:05 +0800862source "arch/arm/mach-zx/Kconfig"
863
Josh Cartwright9a45eb62012-11-19 11:38:29 -0600864source "arch/arm/mach-zynq/Kconfig"
865
Stefan Agner499f1642015-05-21 00:35:44 +0200866# ARMv7-M architecture
867config ARCH_EFM32
868 bool "Energy Micro efm32"
869 depends on ARM_SINGLE_ARMV7M
870 select ARCH_REQUIRE_GPIOLIB
871 help
872 Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko
873 processors.
874
875config ARCH_LPC18XX
876 bool "NXP LPC18xx/LPC43xx"
877 depends on ARM_SINGLE_ARMV7M
878 select ARCH_HAS_RESET_CONTROLLER
879 select ARM_AMBA
880 select CLKSRC_LPC32XX
881 select PINCTRL
882 help
883 Support for NXP's LPC18xx Cortex-M3 and LPC43xx Cortex-M4
884 high performance microcontrollers.
885
886config ARCH_STM32
887 bool "STMicrolectronics STM32"
888 depends on ARM_SINGLE_ARMV7M
889 select ARCH_HAS_RESET_CONTROLLER
890 select ARMV7M_SYSTICK
Maxime Coquelin25263182015-05-22 23:50:52 +0200891 select CLKSRC_STM32
Maxime Coquelinf64e9802015-10-14 18:32:42 +0200892 select PINCTRL
Stefan Agner499f1642015-05-21 00:35:44 +0200893 select RESET_CONTROLLER
894 help
895 Support for STMicroelectronics STM32 processors.
896
Maxime Coquelinfa65fc62015-10-14 18:21:32 +0200897config MACH_STM32F429
898 bool "STMicrolectronics STM32F429"
899 depends on ARCH_STM32
900 default y
901
Vladimir Murzin18471192016-04-25 09:49:13 +0100902config ARCH_MPS2
903 bool "ARM MPS2 paltform"
904 depends on ARM_SINGLE_ARMV7M
905 select ARM_AMBA
906 select CLKSRC_MPS2
907 help
908 Support for Cortex-M Prototyping System (or V2M-MPS2) which comes
909 with a range of available cores like Cortex-M3/M4/M7.
910
911 Please, note that depends which Application Note is used memory map
912 for the platform may vary, so adjustment of RAM base might be needed.
913
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914# Definitions to make life easier
915config ARCH_ACORN
916 bool
917
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100918config PLAT_IOP
919 bool
Mikael Pettersson469d30442009-10-29 11:46:54 -0700920 select GENERIC_CLOCKEVENTS
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100921
Lennert Buytenhek69b02f62008-03-27 14:51:39 -0400922config PLAT_ORION
923 bool
Russell Kingbfe45e02011-05-08 15:33:30 +0100924 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100925 select COMMON_CLK
Russell Kingdc7ad3b2011-05-22 10:01:21 +0100926 select GENERIC_IRQ_CHIP
Andrew Lunn278b45b2012-06-27 13:40:04 +0200927 select IRQ_DOMAIN
Lennert Buytenhek69b02f62008-03-27 14:51:39 -0400928
Thomas Petazzoniabcda1d2012-09-11 14:27:27 +0200929config PLAT_ORION_LEGACY
930 bool
931 select PLAT_ORION
932
Eric Miaobd5ce432009-01-20 12:06:01 +0800933config PLAT_PXA
934 bool
935
Russell Kingf4b8b312010-01-14 12:48:06 +0000936config PLAT_VERSATILE
937 bool
938
Alexandre Courbotd9a1bea2013-11-24 15:30:46 +0900939source "arch/arm/firmware/Kconfig"
940
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941source arch/arm/mm/Kconfig
942
Lennert Buytenhekafe4b252006-12-03 18:51:14 +0100943config IWMMXT
Sebastian Hesselbarthd93003e2014-04-24 22:58:30 +0100944 bool "Enable iWMMXt support"
945 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B
946 default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B
Lennert Buytenhekafe4b252006-12-03 18:51:14 +0100947 help
948 Enable support for iWMMXt context switching at run time if
949 running on a CPU that supports it.
950
eric miao52108642010-12-13 09:42:34 +0100951config MULTI_IRQ_HANDLER
952 bool
953 help
954 Allow each machine to specify it's own IRQ handler at run time.
955
Hyok S. Choi3b93e7b2006-06-22 11:48:56 +0100956if !MMU
957source "arch/arm/Kconfig-nommu"
958endif
959
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100960config PJ4B_ERRATA_4742
961 bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
962 depends on CPU_PJ4B && MACH_ARMADA_370
963 default y
964 help
965 When coming out of either a Wait for Interrupt (WFI) or a Wait for
966 Event (WFE) IDLE states, a specific timing sensitivity exists between
967 the retiring WFI/WFE instructions and the newly issued subsequent
968 instructions. This sensitivity can result in a CPU hang scenario.
969 Workaround:
970 The software must insert either a Data Synchronization Barrier (DSB)
971 or Data Memory Barrier (DMB) command immediately after the WFI/WFE
972 instruction
973
Will Deaconf0c4b8d2012-04-20 17:20:08 +0100974config ARM_ERRATA_326103
975 bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
976 depends on CPU_V6
977 help
978 Executing a SWP instruction to read-only memory does not set bit 11
979 of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
980 treat the access as a read, preventing a COW from occurring and
981 causing the faulting task to livelock.
982
Catalin Marinas9cba3cc2009-04-30 17:06:03 +0100983config ARM_ERRATA_411920
984 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
Russell Kinge399b1a2011-01-17 15:08:32 +0000985 depends on CPU_V6 || CPU_V6K
Catalin Marinas9cba3cc2009-04-30 17:06:03 +0100986 help
987 Invalidation of the Instruction Cache operation can
988 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
989 It does not affect the MPCore. This option enables the ARM Ltd.
990 recommended workaround.
991
Catalin Marinas7ce236f2009-04-30 17:06:09 +0100992config ARM_ERRATA_430973
993 bool "ARM errata: Stale prediction on replaced interworking branch"
994 depends on CPU_V7
995 help
996 This option enables the workaround for the 430973 Cortex-A8
Russell King79403cd2015-04-13 16:14:37 +0100997 r1p* erratum. If a code sequence containing an ARM/Thumb
Catalin Marinas7ce236f2009-04-30 17:06:09 +0100998 interworking branch is replaced with another code sequence at the
999 same virtual address, whether due to self-modifying code or virtual
1000 to physical address re-mapping, Cortex-A8 does not recover from the
1001 stale interworking branch prediction. This results in Cortex-A8
1002 executing the new code sequence in the incorrect ARM or Thumb state.
1003 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1004 and also flushes the branch target cache at every context switch.
1005 Note that setting specific bits in the ACTLR register may not be
1006 available in non-secure mode.
1007
Catalin Marinas855c5512009-04-30 17:06:15 +01001008config ARM_ERRATA_458693
1009 bool "ARM errata: Processor deadlock when a false hazard is created"
1010 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001011 depends on !ARCH_MULTIPLATFORM
Catalin Marinas855c5512009-04-30 17:06:15 +01001012 help
1013 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1014 erratum. For very specific sequences of memory operations, it is
1015 possible for a hazard condition intended for a cache line to instead
1016 be incorrectly associated with a different cache line. This false
1017 hazard might then cause a processor deadlock. The workaround enables
1018 the L1 caching of the NEON accesses and disables the PLD instruction
1019 in the ACTLR register. Note that setting specific bits in the ACTLR
1020 register may not be available in non-secure mode.
1021
Catalin Marinas0516e462009-04-30 17:06:20 +01001022config ARM_ERRATA_460075
1023 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1024 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001025 depends on !ARCH_MULTIPLATFORM
Catalin Marinas0516e462009-04-30 17:06:20 +01001026 help
1027 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1028 erratum. Any asynchronous access to the L2 cache may encounter a
1029 situation in which recent store transactions to the L2 cache are lost
1030 and overwritten with stale memory contents from external memory. The
1031 workaround disables the write-allocate mode for the L2 cache via the
1032 ACTLR register. Note that setting specific bits in the ACTLR register
1033 may not be available in non-secure mode.
1034
Will Deacon9f050272010-09-14 09:51:43 +01001035config ARM_ERRATA_742230
1036 bool "ARM errata: DMB operation may be faulty"
1037 depends on CPU_V7 && SMP
Rob Herring62e4d352012-12-21 22:42:40 +01001038 depends on !ARCH_MULTIPLATFORM
Will Deacon9f050272010-09-14 09:51:43 +01001039 help
1040 This option enables the workaround for the 742230 Cortex-A9
1041 (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1042 between two write operations may not ensure the correct visibility
1043 ordering of the two writes. This workaround sets a specific bit in
1044 the diagnostic register of the Cortex-A9 which causes the DMB
1045 instruction to behave as a DSB, ensuring the correct behaviour of
1046 the two writes.
1047
Will Deacona672e992010-09-14 09:53:02 +01001048config ARM_ERRATA_742231
1049 bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1050 depends on CPU_V7 && SMP
Rob Herring62e4d352012-12-21 22:42:40 +01001051 depends on !ARCH_MULTIPLATFORM
Will Deacona672e992010-09-14 09:53:02 +01001052 help
1053 This option enables the workaround for the 742231 Cortex-A9
1054 (r2p0..r2p2) erratum. Under certain conditions, specific to the
1055 Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1056 accessing some data located in the same cache line, may get corrupted
1057 data due to bad handling of the address hazard when the line gets
1058 replaced from one of the CPUs at the same time as another CPU is
1059 accessing it. This workaround sets specific bits in the diagnostic
1060 register of the Cortex-A9 which reduces the linefill issuing
1061 capabilities of the processor.
1062
Jon Medhurst69155792013-06-07 10:35:35 +01001063config ARM_ERRATA_643719
1064 bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
1065 depends on CPU_V7 && SMP
Russell Kinge5a5de42015-04-02 23:58:55 +01001066 default y
Jon Medhurst69155792013-06-07 10:35:35 +01001067 help
1068 This option enables the workaround for the 643719 Cortex-A9 (prior to
1069 r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
1070 register returns zero when it should return one. The workaround
1071 corrects this value, ensuring cache maintenance operations which use
1072 it behave as intended and avoiding data corruption.
1073
Will Deaconcdf357f2010-08-05 11:20:51 +01001074config ARM_ERRATA_720789
1075 bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
Dave Martine66dc742011-12-08 13:37:46 +01001076 depends on CPU_V7
Will Deaconcdf357f2010-08-05 11:20:51 +01001077 help
1078 This option enables the workaround for the 720789 Cortex-A9 (prior to
1079 r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1080 broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1081 As a consequence of this erratum, some TLB entries which should be
1082 invalidated are not, resulting in an incoherency in the system page
1083 tables. The workaround changes the TLB flushing routines to invalidate
1084 entries regardless of the ASID.
Will Deacon475d92f2010-09-28 14:02:02 +01001085
1086config ARM_ERRATA_743622
1087 bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1088 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001089 depends on !ARCH_MULTIPLATFORM
Will Deacon475d92f2010-09-28 14:02:02 +01001090 help
1091 This option enables the workaround for the 743622 Cortex-A9
Will Deaconefbc74a2012-02-24 12:12:38 +01001092 (r2p*) erratum. Under very rare conditions, a faulty
Will Deacon475d92f2010-09-28 14:02:02 +01001093 optimisation in the Cortex-A9 Store Buffer may lead to data
1094 corruption. This workaround sets a specific bit in the diagnostic
1095 register of the Cortex-A9 which disables the Store Buffer
1096 optimisation, preventing the defect from occurring. This has no
1097 visible impact on the overall performance or power consumption of the
1098 processor.
1099
Will Deacon9a27c272011-02-18 16:36:35 +01001100config ARM_ERRATA_751472
1101 bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
Dave Martinba90c512011-12-08 13:41:06 +01001102 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001103 depends on !ARCH_MULTIPLATFORM
Will Deacon9a27c272011-02-18 16:36:35 +01001104 help
1105 This option enables the workaround for the 751472 Cortex-A9 (prior
1106 to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1107 completion of a following broadcasted operation if the second
1108 operation is received by a CPU before the ICIALLUIS has completed,
1109 potentially leading to corrupted entries in the cache or TLB.
1110
Will Deaconfcbdc5fe2011-02-28 18:15:16 +01001111config ARM_ERRATA_754322
1112 bool "ARM errata: possible faulty MMU translations following an ASID switch"
1113 depends on CPU_V7
1114 help
1115 This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1116 r3p*) erratum. A speculative memory access may cause a page table walk
1117 which starts prior to an ASID switch but completes afterwards. This
1118 can populate the micro-TLB with a stale entry which may be hit with
1119 the new ASID. This workaround places two dsb instructions in the mm
1120 switching code so that no page table walks can cross the ASID switch.
1121
Will Deacon5dab26a2011-03-04 12:38:54 +01001122config ARM_ERRATA_754327
1123 bool "ARM errata: no automatic Store Buffer drain"
1124 depends on CPU_V7 && SMP
1125 help
1126 This option enables the workaround for the 754327 Cortex-A9 (prior to
1127 r2p0) erratum. The Store Buffer does not have any automatic draining
1128 mechanism and therefore a livelock may occur if an external agent
1129 continuously polls a memory location waiting to observe an update.
1130 This workaround defines cpu_relax() as smp_mb(), preventing correctly
1131 written polling loops from denying visibility of updates to memory.
1132
Catalin Marinas145e10e2011-08-15 11:04:41 +01001133config ARM_ERRATA_364296
1134 bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
Fabio Estevamfd832472013-07-09 18:34:01 +01001135 depends on CPU_V6
Catalin Marinas145e10e2011-08-15 11:04:41 +01001136 help
1137 This options enables the workaround for the 364296 ARM1136
1138 r0p2 erratum (possible cache data corruption with
1139 hit-under-miss enabled). It sets the undocumented bit 31 in
1140 the auxiliary control register and the FI bit in the control
1141 register, thus disabling hit-under-miss without putting the
1142 processor into full low interrupt latency mode. ARM11MPCore
1143 is not affected.
1144
Will Deaconf630c1b2011-09-15 11:45:15 +01001145config ARM_ERRATA_764369
1146 bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1147 depends on CPU_V7 && SMP
1148 help
1149 This option enables the workaround for erratum 764369
1150 affecting Cortex-A9 MPCore with two or more processors (all
1151 current revisions). Under certain timing circumstances, a data
1152 cache line maintenance operation by MVA targeting an Inner
1153 Shareable memory region may fail to proceed up to either the
1154 Point of Coherency or to the Point of Unification of the
1155 system. This workaround adds a DSB instruction before the
1156 relevant cache maintenance functions and sets a specific bit
1157 in the diagnostic control register of the SCU.
1158
Simon Horman7253b852012-09-28 02:12:45 +01001159config ARM_ERRATA_775420
1160 bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
1161 depends on CPU_V7
1162 help
1163 This option enables the workaround for the 775420 Cortex-A9 (r2p2,
1164 r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
1165 operation aborts with MMU exception, it might cause the processor
1166 to deadlock. This workaround puts DSB before executing ISB if
1167 an abort may occur on cache maintenance.
1168
Catalin Marinas93dc6882013-03-26 23:35:04 +01001169config ARM_ERRATA_798181
1170 bool "ARM errata: TLBI/DSB failure on Cortex-A15"
1171 depends on CPU_V7 && SMP
1172 help
1173 On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
1174 adequately shooting down all use of the old entries. This
1175 option enables the Linux kernel workaround for this erratum
1176 which sends an IPI to the CPUs that are running the same ASID
1177 as the one being invalidated.
1178
Will Deacon84b65042013-08-20 17:29:55 +01001179config ARM_ERRATA_773022
1180 bool "ARM errata: incorrect instructions may be executed from loop buffer"
1181 depends on CPU_V7
1182 help
1183 This option enables the workaround for the 773022 Cortex-A15
1184 (up to r0p4) erratum. In certain rare sequences of code, the
1185 loop buffer may deliver incorrect instructions. This
1186 workaround disables the loop buffer to avoid the erratum.
1187
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188endmenu
1189
1190source "arch/arm/common/Kconfig"
1191
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192menu "Bus support"
1193
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194config ISA
1195 bool
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 help
1197 Find out whether you have ISA slots on your motherboard. ISA is the
1198 name of a bus system, i.e. the way the CPU talks to the other stuff
1199 inside your box. Other bus systems are PCI, EISA, MicroChannel
1200 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1201 newer boards don't support it. If you have ISA, say Y, otherwise N.
1202
Russell King065909b2006-01-04 15:44:16 +00001203# Select ISA DMA controller support
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204config ISA_DMA
1205 bool
Russell King065909b2006-01-04 15:44:16 +00001206 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207
Russell King065909b2006-01-04 15:44:16 +00001208# Select ISA DMA interface
Al Viro5cae8412005-05-04 05:39:22 +01001209config ISA_DMA_API
1210 bool
Al Viro5cae8412005-05-04 05:39:22 +01001211
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212config PCI
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +01001213 bool "PCI support" if MIGHT_HAVE_PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 help
1215 Find out whether you have a PCI motherboard. PCI is the name of a
1216 bus system, i.e. the way the CPU talks to the other stuff inside
1217 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1218 VESA. If you have PCI, say Y, otherwise N.
1219
Anton Vorontsov52882172010-04-19 13:20:49 +01001220config PCI_DOMAINS
1221 bool
1222 depends on PCI
1223
Lorenzo Pieralisi8c7d14742014-11-21 11:29:26 +00001224config PCI_DOMAINS_GENERIC
1225 def_bool PCI_DOMAINS
1226
Marcelo Roberto Jimenezb080ac82010-12-16 21:34:51 +01001227config PCI_NANOENGINE
1228 bool "BSE nanoEngine PCI support"
1229 depends on SA1100_NANOENGINE
1230 help
1231 Enable PCI on the BSE nanoEngine board.
1232
Matthew Wilcox36e23592007-07-10 10:54:40 -06001233config PCI_SYSCALL
1234 def_bool PCI
1235
Mike Rapoporta0113a92007-11-25 08:55:34 +01001236config PCI_HOST_ITE8152
1237 bool
1238 depends on PCI && MACH_ARMCORE
1239 default y
1240 select DMABOUNCE
1241
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242source "drivers/pci/Kconfig"
1243
1244source "drivers/pcmcia/Kconfig"
1245
1246endmenu
1247
1248menu "Kernel Features"
1249
Dave Martin3b556582011-12-07 15:38:04 +00001250config HAVE_SMP
1251 bool
1252 help
1253 This option should be selected by machines which have an SMP-
1254 capable CPU.
1255
1256 The only effect of this option is to make the SMP-related
1257 options available to the user for configuration.
1258
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259config SMP
Russell Kingbb2d8132011-05-12 09:52:02 +01001260 bool "Symmetric Multi-Processing"
Russell Kingfbb4dda2011-01-17 18:01:58 +00001261 depends on CPU_V6K || CPU_V7
Russell Kingbc282482009-05-17 18:58:34 +01001262 depends on GENERIC_CLOCKEVENTS
Dave Martin3b556582011-12-07 15:38:04 +00001263 depends on HAVE_SMP
Jonathan Austin801bb212013-02-22 18:56:04 +00001264 depends on MMU || ARM_MPU
Arnd Bergmann03617482015-05-26 15:36:58 +01001265 select IRQ_WORK
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 help
1267 This enables support for systems with more than one CPU. If you have
Robert Graffham4a474152014-01-23 15:55:29 -08001268 a system with only one CPU, say N. If you have a system with more
1269 than one CPU, say Y.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270
Robert Graffham4a474152014-01-23 15:55:29 -08001271 If you say N here, the kernel will run on uni- and multiprocessor
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 machines, but will use only one CPU of a multiprocessor machine. If
Robert Graffham4a474152014-01-23 15:55:29 -08001273 you say Y here, the kernel will run on many, but not all,
1274 uniprocessor machines. On a uniprocessor machine, the kernel
1275 will run faster if you say N here.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276
Paul Bolle395cf962011-08-15 02:02:26 +02001277 See also <file:Documentation/x86/i386/IO-APIC.txt>,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
Justin P. Mattock50a23e62010-10-16 10:36:23 -07001279 <http://tldp.org/HOWTO/SMP-HOWTO.html>.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280
1281 If you don't know what to do here, say N.
1282
Russell Kingf00ec482010-09-04 10:47:48 +01001283config SMP_ON_UP
Russell King5744ff42015-02-13 11:04:21 +00001284 bool "Allow booting SMP kernel on uniprocessor systems"
Jonathan Austin801bb212013-02-22 18:56:04 +00001285 depends on SMP && !XIP_KERNEL && MMU
Russell Kingf00ec482010-09-04 10:47:48 +01001286 default y
1287 help
1288 SMP kernels contain instructions which fail on non-SMP processors.
1289 Enabling this option allows the kernel to modify itself to make
1290 these instructions safe. Disabling it allows about 1K of space
1291 savings.
1292
1293 If you don't know what to do here, say Y.
1294
Vincent Guittotc9018aa2011-08-08 13:21:59 +01001295config ARM_CPU_TOPOLOGY
1296 bool "Support cpu topology definition"
1297 depends on SMP && CPU_V7
1298 default y
1299 help
1300 Support ARM cpu topology definition. The MPIDR register defines
1301 affinity between processors which is then used to describe the cpu
1302 topology of an ARM System.
1303
1304config SCHED_MC
1305 bool "Multi-core scheduler support"
1306 depends on ARM_CPU_TOPOLOGY
1307 help
1308 Multi-core scheduler support improves the CPU scheduler's decision
1309 making when dealing with multi-core CPU chips at a cost of slightly
1310 increased overhead in some places. If unsure say N here.
1311
1312config SCHED_SMT
1313 bool "SMT scheduler support"
1314 depends on ARM_CPU_TOPOLOGY
1315 help
1316 Improves the CPU scheduler's decision making when dealing with
1317 MultiThreading at a cost of slightly increased overhead in some
1318 places. If unsure say N here.
1319
Russell Kinga8cbcd92009-05-16 11:51:14 +01001320config HAVE_ARM_SCU
1321 bool
Russell Kinga8cbcd92009-05-16 11:51:14 +01001322 help
1323 This option enables support for the ARM system coherency unit
1324
Mark Rutland8a4da6e2012-11-12 14:33:44 +00001325config HAVE_ARM_ARCH_TIMER
Marc Zyngier022c03a2012-01-11 17:25:17 +00001326 bool "Architected timer support"
1327 depends on CPU_V7
Mark Rutland8a4da6e2012-11-12 14:33:44 +00001328 select ARM_ARCH_TIMER
Will Deacon0c4034622013-11-19 15:46:17 +01001329 select GENERIC_CLOCKEVENTS
Marc Zyngier022c03a2012-01-11 17:25:17 +00001330 help
1331 This option enables support for the ARM architected timer
1332
Russell Kingf32f4ce2009-05-16 12:14:21 +01001333config HAVE_ARM_TWD
1334 bool
Rob Herringda4a6862013-02-06 21:17:47 -06001335 select CLKSRC_OF if OF
Russell Kingf32f4ce2009-05-16 12:14:21 +01001336 help
1337 This options enables support for the ARM timer and watchdog unit
1338
Nicolas Pitree8db2882012-04-12 02:45:22 -04001339config MCPM
1340 bool "Multi-Cluster Power Management"
1341 depends on CPU_V7 && SMP
1342 help
1343 This option provides the common power management infrastructure
1344 for (multi-)cluster based systems, such as big.LITTLE based
1345 systems.
1346
Haojian Zhuangebf4a5c2014-04-15 14:52:00 +08001347config MCPM_QUAD_CLUSTER
1348 bool
1349 depends on MCPM
1350 help
1351 To avoid wasting resources unnecessarily, MCPM only supports up
1352 to 2 clusters by default.
1353 Platforms with 3 or 4 clusters that use MCPM must select this
1354 option to allow the additional clusters to be managed.
1355
Nicolas Pitre1c33be52012-04-12 02:56:10 -04001356config BIG_LITTLE
1357 bool "big.LITTLE support (Experimental)"
1358 depends on CPU_V7 && SMP
1359 select MCPM
1360 help
1361 This option enables support selections for the big.LITTLE
1362 system architecture.
1363
1364config BL_SWITCHER
1365 bool "big.LITTLE switcher support"
Arnd Bergmann6c044fe2015-11-19 15:49:23 +01001366 depends on BIG_LITTLE && MCPM && HOTPLUG_CPU && ARM_GIC
Russell King51aaf812014-04-22 22:26:27 +01001367 select CPU_PM
Nicolas Pitre1c33be52012-04-12 02:56:10 -04001368 help
1369 The big.LITTLE "switcher" provides the core functionality to
1370 transparently handle transition between a cluster of A15's
1371 and a cluster of A7's in a big.LITTLE system.
1372
Nicolas Pitreb22537c2012-04-12 03:04:28 -04001373config BL_SWITCHER_DUMMY_IF
1374 tristate "Simple big.LITTLE switcher user interface"
1375 depends on BL_SWITCHER && DEBUG_KERNEL
1376 help
1377 This is a simple and dummy char dev interface to control
1378 the big.LITTLE switcher core code. It is meant for
1379 debugging purposes only.
1380
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001381choice
1382 prompt "Memory split"
Russell King006fa252014-02-26 19:40:46 +00001383 depends on MMU
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001384 default VMSPLIT_3G
1385 help
1386 Select the desired split between kernel and user memory.
1387
1388 If you are not absolutely sure what you are doing, leave this
1389 option alone!
1390
1391 config VMSPLIT_3G
1392 bool "3G/1G user/kernel split"
Nicolas Pitre63ce4462015-09-13 03:30:11 +01001393 config VMSPLIT_3G_OPT
1394 bool "3G/1G user/kernel split (for full 1G low memory)"
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001395 config VMSPLIT_2G
1396 bool "2G/2G user/kernel split"
1397 config VMSPLIT_1G
1398 bool "1G/3G user/kernel split"
1399endchoice
1400
1401config PAGE_OFFSET
1402 hex
Russell King006fa252014-02-26 19:40:46 +00001403 default PHYS_OFFSET if !MMU
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001404 default 0x40000000 if VMSPLIT_1G
1405 default 0x80000000 if VMSPLIT_2G
Nicolas Pitre63ce4462015-09-13 03:30:11 +01001406 default 0xB0000000 if VMSPLIT_3G_OPT
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001407 default 0xC0000000
1408
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409config NR_CPUS
1410 int "Maximum number of CPUs (2-32)"
1411 range 2 32
1412 depends on SMP
1413 default "4"
1414
Russell Kinga054a812005-11-02 22:24:33 +00001415config HOTPLUG_CPU
Russell King00b7ded2012-10-22 22:54:30 +01001416 bool "Support for hot-pluggable CPUs"
Stephen Rothwell40b31362013-05-21 13:49:35 +10001417 depends on SMP
Russell Kinga054a812005-11-02 22:24:33 +00001418 help
1419 Say Y here to experiment with turning CPUs off and on. CPUs
1420 can be controlled through /sys/devices/system/cpu.
1421
Will Deacon2bdd4242012-12-12 19:20:52 +00001422config ARM_PSCI
1423 bool "Support for the ARM Power State Coordination Interface (PSCI)"
Jens Wiklandere6796602016-01-04 15:46:47 +01001424 depends on HAVE_ARM_SMCCC
Mark Rutlandbe120392015-07-31 15:46:19 +01001425 select ARM_PSCI_FW
Will Deacon2bdd4242012-12-12 19:20:52 +00001426 help
1427 Say Y here if you want Linux to communicate with system firmware
1428 implementing the PSCI specification for CPU-centric power
1429 management operations described in ARM document number ARM DEN
1430 0022A ("Power State Coordination Interface System Software on
1431 ARM processors").
1432
Maxime Ripard2a6ad872013-02-03 12:24:48 +01001433# The GPIO number here must be sorted by descending number. In case of
1434# a multiplatform kernel, we just want the highest value required by the
1435# selected platforms.
Peter De Schrijver (NVIDIA)44986ab2011-12-21 10:48:45 +01001436config ARCH_NR_GPIO
1437 int
Gregory Fongb35d2e52015-05-28 19:14:10 -07001438 default 1024 if ARCH_BRCMSTB || ARCH_SHMOBILE || ARCH_TEGRA || \
1439 ARCH_ZYNQ
Tomasz Figaaa425872014-07-03 13:17:12 +02001440 default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || \
1441 SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210
Boris BREZILLONeb171a92014-04-10 15:52:46 +02001442 default 416 if ARCH_SUNXI
Olof Johansson06b851e2013-04-02 18:33:58 -07001443 default 392 if ARCH_U8500
Tony Prisk01bb9142013-03-09 18:22:30 +13001444 default 352 if ARCH_VT8500
Heiko Stuebner7b5da4c2014-05-26 00:13:51 +02001445 default 288 if ARCH_ROCKCHIP
Maxime Ripard2a6ad872013-02-03 12:24:48 +01001446 default 264 if MACH_H4700
Peter De Schrijver (NVIDIA)44986ab2011-12-21 10:48:45 +01001447 default 0
1448 help
1449 Maximum number of GPIOs in the system.
1450
1451 If unsure, leave the default value.
1452
Uwe Kleine-Königd45a3982009-08-13 20:38:17 +02001453source kernel/Kconfig.preempt
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454
Russell Kingc9218b12013-04-27 23:31:10 +01001455config HZ_FIXED
Russell Kingf8065812006-03-02 22:41:59 +00001456 int
Kukjin Kim070b8b42014-07-02 07:50:15 +09001457 default 200 if ARCH_EBSA110 || ARCH_S3C24XX || \
Kukjin Kima73ddc62011-05-11 16:27:51 +09001458 ARCH_S5PV210 || ARCH_EXYNOS4
Alexandre Belloni1164f672015-03-13 22:57:24 +01001459 default 128 if SOC_AT91RM9200
Russell King47d84682013-09-10 23:47:55 +01001460 default 0
Russell Kingc9218b12013-04-27 23:31:10 +01001461
1462choice
Russell King47d84682013-09-10 23:47:55 +01001463 depends on HZ_FIXED = 0
Russell Kingc9218b12013-04-27 23:31:10 +01001464 prompt "Timer frequency"
1465
1466config HZ_100
1467 bool "100 Hz"
1468
1469config HZ_200
1470 bool "200 Hz"
1471
1472config HZ_250
1473 bool "250 Hz"
1474
1475config HZ_300
1476 bool "300 Hz"
1477
1478config HZ_500
1479 bool "500 Hz"
1480
1481config HZ_1000
1482 bool "1000 Hz"
1483
1484endchoice
1485
1486config HZ
1487 int
Russell King47d84682013-09-10 23:47:55 +01001488 default HZ_FIXED if HZ_FIXED != 0
Russell Kingc9218b12013-04-27 23:31:10 +01001489 default 100 if HZ_100
1490 default 200 if HZ_200
1491 default 250 if HZ_250
1492 default 300 if HZ_300
1493 default 500 if HZ_500
1494 default 1000
1495
1496config SCHED_HRTICK
1497 def_bool HIGH_RES_TIMERS
Russell Kingf8065812006-03-02 22:41:59 +00001498
Catalin Marinas16c79652009-07-24 12:33:02 +01001499config THUMB2_KERNEL
Uwe Kleine-Königbc7dea02011-12-09 20:52:10 +01001500 bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
Uwe Kleine-König4477ca42013-03-21 21:02:37 +01001501 depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
Uwe Kleine-Königbc7dea02011-12-09 20:52:10 +01001502 default y if CPU_THUMBONLY
Catalin Marinas16c79652009-07-24 12:33:02 +01001503 select AEABI
1504 select ARM_ASM_UNIFIED
Arnd Bergmann89bace62011-06-10 14:12:21 +00001505 select ARM_UNWIND
Catalin Marinas16c79652009-07-24 12:33:02 +01001506 help
1507 By enabling this option, the kernel will be compiled in
1508 Thumb-2 mode. A compiler/assembler that understand the unified
1509 ARM-Thumb syntax is needed.
1510
1511 If unsure, say N.
1512
Dave Martin6f685c52011-03-03 11:41:12 +01001513config THUMB2_AVOID_R_ARM_THM_JUMP11
1514 bool "Work around buggy Thumb-2 short branch relocations in gas"
1515 depends on THUMB2_KERNEL && MODULES
1516 default y
1517 help
1518 Various binutils versions can resolve Thumb-2 branches to
1519 locally-defined, preemptible global symbols as short-range "b.n"
1520 branch instructions.
1521
1522 This is a problem, because there's no guarantee the final
1523 destination of the symbol, or any candidate locations for a
1524 trampoline, are within range of the branch. For this reason, the
1525 kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1526 relocation in modules at all, and it makes little sense to add
1527 support.
1528
1529 The symptom is that the kernel fails with an "unsupported
1530 relocation" error when loading some modules.
1531
1532 Until fixed tools are available, passing
1533 -fno-optimize-sibling-calls to gcc should prevent gcc generating
1534 code which hits this problem, at the cost of a bit of extra runtime
1535 stack usage in some cases.
1536
1537 The problem is described in more detail at:
1538 https://bugs.launchpad.net/binutils-linaro/+bug/725126
1539
1540 Only Thumb-2 kernels are affected.
1541
1542 Unless you are sure your tools don't have this problem, say Y.
1543
Catalin Marinas0becb082009-07-24 12:32:53 +01001544config ARM_ASM_UNIFIED
1545 bool
1546
Nicolas Pitre42f25bd2015-12-12 02:49:21 +01001547config ARM_PATCH_IDIV
1548 bool "Runtime patch udiv/sdiv instructions into __aeabi_{u}idiv()"
1549 depends on CPU_32v7 && !XIP_KERNEL
1550 default y
1551 help
1552 The ARM compiler inserts calls to __aeabi_idiv() and
1553 __aeabi_uidiv() when it needs to perform division on signed
1554 and unsigned integers. Some v7 CPUs have support for the sdiv
1555 and udiv instructions that can be used to implement those
1556 functions.
1557
1558 Enabling this option allows the kernel to modify itself to
1559 replace the first two instructions of these library functions
1560 with the sdiv or udiv plus "bx lr" instructions when the CPU
1561 it is running on supports them. Typically this will be faster
1562 and less power intensive than running the original library
1563 code to do integer division.
1564
Nicolas Pitre704bdda2006-01-14 16:33:50 +00001565config AEABI
1566 bool "Use the ARM EABI to compile the kernel"
1567 help
1568 This option allows for the kernel to be compiled using the latest
1569 ARM ABI (aka EABI). This is only useful if you are using a user
1570 space environment that is also compiled with EABI.
1571
1572 Since there are major incompatibilities between the legacy ABI and
1573 EABI, especially with regard to structure member alignment, this
1574 option also changes the kernel syscall calling convention to
1575 disambiguate both ABIs and allow for backward compatibility support
1576 (selected with CONFIG_OABI_COMPAT).
1577
1578 To use this you need GCC version 4.0.0 or later.
1579
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001580config OABI_COMPAT
Russell Kinga73a3ff2006-02-08 21:09:55 +00001581 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
Kees Cookd6f94fa2013-01-16 18:53:14 -08001582 depends on AEABI && !THUMB2_KERNEL
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001583 help
1584 This option preserves the old syscall interface along with the
1585 new (ARM EABI) one. It also provides a compatibility layer to
1586 intercept syscalls that have structure arguments which layout
1587 in memory differs between the legacy ABI and the new ARM EABI
1588 (only for non "thumb" binaries). This option adds a tiny
1589 overhead to all syscalls and produces a slightly larger kernel.
Kees Cook91702172013-11-09 00:51:56 +01001590
1591 The seccomp filter system will not be available when this is
1592 selected, since there is no way yet to sensibly distinguish
1593 between calling conventions during filtering.
1594
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001595 If you know you'll be using only pure EABI user space then you
1596 can say N here. If this option is not selected and you attempt
1597 to execute a legacy ABI binary then the result will be
1598 UNPREDICTABLE (in fact it can be predicted that it won't work
Kees Cookb02f8462013-11-09 00:31:11 +01001599 at all). If in doubt say N.
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001600
Mel Gormaneb335752009-05-13 17:34:48 +01001601config ARCH_HAS_HOLES_MEMORYMODEL
Mel Gormane80d6a22008-08-14 11:10:14 +01001602 bool
Mel Gormane80d6a22008-08-14 11:10:14 +01001603
Russell King05944d72006-11-30 20:43:51 +00001604config ARCH_SPARSEMEM_ENABLE
1605 bool
1606
Russell King07a2f732008-10-01 21:39:58 +01001607config ARCH_SPARSEMEM_DEFAULT
1608 def_bool ARCH_SPARSEMEM_ENABLE
1609
Russell King05944d72006-11-30 20:43:51 +00001610config ARCH_SELECT_MEMORY_MODEL
Russell Kingbe370302010-05-07 17:40:33 +01001611 def_bool ARCH_SPARSEMEM_ENABLE
Yasunori Gotoc80d79d2006-04-10 22:53:53 -07001612
Will Deacon7b7bf492011-05-19 13:21:14 +01001613config HAVE_ARCH_PFN_VALID
1614 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1615
Steve Capperb8cd51a2014-10-09 15:29:20 -07001616config HAVE_GENERIC_RCU_GUP
1617 def_bool y
1618 depends on ARM_LPAE
1619
Nicolas Pitre053a96c2008-09-19 00:36:12 -04001620config HIGHMEM
Russell Kinge8db89a2011-05-12 09:53:05 +01001621 bool "High Memory Support"
1622 depends on MMU
Nicolas Pitre053a96c2008-09-19 00:36:12 -04001623 help
1624 The address space of ARM processors is only 4 Gigabytes large
1625 and it has to accommodate user address space, kernel address
1626 space as well as some memory mapped IO. That means that, if you
1627 have a large amount of physical memory and/or IO, not all of the
1628 memory can be "permanently mapped" by the kernel. The physical
1629 memory that is not permanently mapped is called "high memory".
1630
1631 Depending on the selected kernel/user memory split, minimum
1632 vmalloc space and actual amount of RAM, you may not need this
1633 option which should result in a slightly faster kernel.
1634
1635 If unsure, say n.
1636
Russell King65cec8e2009-08-17 20:02:06 +01001637config HIGHPTE
Russell King9a431bd2015-06-25 10:44:08 +01001638 bool "Allocate 2nd-level pagetables from highmem" if EXPERT
Russell King65cec8e2009-08-17 20:02:06 +01001639 depends on HIGHMEM
Russell King9a431bd2015-06-25 10:44:08 +01001640 default y
Russell Kingb4d103d2015-06-25 10:49:45 +01001641 help
1642 The VM uses one page of physical memory for each page table.
1643 For systems with a lot of processes, this can use a lot of
1644 precious low memory, eventually leading to low memory being
1645 consumed by page tables. Setting this option will allow
1646 user-space 2nd level page tables to reside in high memory.
Russell King65cec8e2009-08-17 20:02:06 +01001647
Russell Kinga5e090a2015-08-19 20:40:41 +01001648config CPU_SW_DOMAIN_PAN
1649 bool "Enable use of CPU domains to implement privileged no-access"
1650 depends on MMU && !ARM_LPAE
Jamie Iles1b8873a2010-02-02 20:25:44 +01001651 default y
1652 help
Russell Kinga5e090a2015-08-19 20:40:41 +01001653 Increase kernel security by ensuring that normal kernel accesses
1654 are unable to access userspace addresses. This can help prevent
1655 use-after-free bugs becoming an exploitable privilege escalation
1656 by ensuring that magic values (such as LIST_POISON) will always
1657 fault when dereferenced.
1658
1659 CPUs with low-vector mappings use a best-efforts implementation.
1660 Their lower 1MB needs to remain accessible for the vectors, but
1661 the remainder of userspace will become appropriately inaccessible.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662
1663config HW_PERF_EVENTS
Mark Rutlandfa8ad782015-07-06 12:23:53 +01001664 def_bool y
1665 depends on ARM_PMU
Jamie Iles1b8873a2010-02-02 20:25:44 +01001666
Catalin Marinas1355e2a2012-07-25 14:32:38 +01001667config SYS_SUPPORTS_HUGETLBFS
1668 def_bool y
1669 depends on ARM_LPAE
1670
Catalin Marinas8d962502012-07-25 14:39:26 +01001671config HAVE_ARCH_TRANSPARENT_HUGEPAGE
1672 def_bool y
1673 depends on ARM_LPAE
1674
Steven Capper4bfab202013-07-26 14:58:22 +01001675config ARCH_WANT_GENERAL_HUGETLB
1676 def_bool y
1677
Ard Biesheuvel7d485f62014-11-24 16:54:35 +01001678config ARM_MODULE_PLTS
1679 bool "Use PLTs to allow module memory to spill over into vmalloc area"
1680 depends on MODULES
1681 help
1682 Allocate PLTs when loading modules so that jumps and calls whose
1683 targets are too far away for their relative offsets to be encoded
1684 in the instructions themselves can be bounced via veneers in the
1685 module's PLT. This allows modules to be allocated in the generic
1686 vmalloc area after the dedicated module memory area has been
1687 exhausted. The modules will use slightly more memory, but after
1688 rounding up to page size, the actual memory footprint is usually
1689 the same.
1690
1691 Say y if you are getting out of memory errors while loading modules
1692
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693source "mm/Kconfig"
1694
Magnus Dammc1b2d972010-07-05 10:00:11 +01001695config FORCE_MAX_ZONEORDER
Ulrich Hecht36d6c922015-08-14 15:51:06 +02001696 int "Maximum zone order"
Yegor Yefremov898f08e2012-10-08 14:37:53 -07001697 default "12" if SOC_AM33XX
Uwe Kleine-König6d85e2b2011-11-17 14:36:23 +01001698 default "9" if SA1111 || ARCH_EFM32
Magnus Dammc1b2d972010-07-05 10:00:11 +01001699 default "11"
1700 help
1701 The kernel memory allocator divides physically contiguous memory
1702 blocks into "zones", where each zone is a power of two number of
1703 pages. This option selects the largest power of two that the kernel
1704 keeps in the memory allocator. If you need to allocate very large
1705 blocks of physically contiguous memory, then you may need to
1706 increase this value.
1707
1708 This config option is actually maximum order plus one. For example,
1709 a value of 11 means that the largest free memory block is 2^10 pages.
1710
Linus Torvalds1da177e2005-04-16 15:20:36 -07001711config ALIGNMENT_TRAP
1712 bool
Hyok S. Choif12d0d72006-09-26 17:36:37 +09001713 depends on CPU_CP15_MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714 default y if !ARCH_EBSA110
Russell Kinge119bff2010-01-10 17:23:29 +00001715 select HAVE_PROC_CPU if PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001716 help
Matt LaPlante84eb8d02006-10-03 22:53:09 +02001717 ARM processors cannot fetch/store information which is not
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1719 address divisible by 4. On 32-bit ARM processors, these non-aligned
1720 fetch/store instructions will be emulated in software if you say
1721 here, which has a severe performance impact. This is necessary for
1722 correct operation of some network protocols. With an IP-only
1723 configuration it is safe to say N, otherwise say Y.
1724
Lennert Buytenhek39ec58f2009-03-09 14:30:09 -04001725config UACCESS_WITH_MEMCPY
Linus Walleij38ef2ad2012-09-10 16:36:37 +01001726 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
1727 depends on MMU
Lennert Buytenhek39ec58f2009-03-09 14:30:09 -04001728 default y if CPU_FEROCEON
1729 help
1730 Implement faster copy_to_user and clear_user methods for CPU
1731 cores where a 8-word STM instruction give significantly higher
1732 memory write throughput than a sequence of individual 32bit stores.
1733
1734 A possible side effect is a slight increase in scheduling latency
1735 between threads sharing the same address space if they invoke
1736 such copy operations with large buffers.
1737
1738 However, if the CPU data cache is using a write-allocate mode,
1739 this option is unlikely to provide any performance gain.
1740
Nicolas Pitre70c70d92010-08-26 15:08:35 -07001741config SECCOMP
1742 bool
1743 prompt "Enable seccomp to safely compute untrusted bytecode"
1744 ---help---
1745 This kernel feature is useful for number crunching applications
1746 that may need to compute untrusted bytecode during their
1747 execution. By using pipes or other transports made available to
1748 the process as file descriptors supporting the read/write
1749 syscalls, it's possible to isolate those applications in
1750 their own address space using seccomp. Once seccomp is
1751 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1752 and the task is only allowed to execute a few safe syscalls
1753 defined by each seccomp mode.
1754
Stefano Stabellini06e62952013-10-15 15:47:14 +00001755config SWIOTLB
1756 def_bool y
1757
1758config IOMMU_HELPER
1759 def_bool SWIOTLB
1760
Stefano Stabellini02c24332015-11-23 10:32:57 +00001761config PARAVIRT
1762 bool "Enable paravirtualization code"
1763 help
1764 This changes the kernel so it can modify itself when it is run
1765 under a hypervisor, potentially improving performance significantly
1766 over full virtualization.
1767
1768config PARAVIRT_TIME_ACCOUNTING
1769 bool "Paravirtual steal time accounting"
1770 select PARAVIRT
1771 default n
1772 help
1773 Select this option to enable fine granularity task steal time
1774 accounting. Time spent executing other tasks in parallel with
1775 the current vCPU is discounted from the vCPU power. To account for
1776 that, there can be a small performance impact.
1777
1778 If in doubt, say N here.
1779
Stefano Stabellinieff8d642012-09-17 14:58:17 +00001780config XEN_DOM0
1781 def_bool y
1782 depends on XEN
1783
1784config XEN
Julien Grallc2ba1f72014-09-17 14:07:06 -07001785 bool "Xen guest support on ARM"
Ian Campbell85323a92013-03-07 07:17:25 +00001786 depends on ARM && AEABI && OF
Arnd Bergmannf880b672012-10-09 10:33:52 +00001787 depends on CPU_V7 && !CPU_V6
Ian Campbell85323a92013-03-07 07:17:25 +00001788 depends on !GENERIC_ATOMIC64
Uwe Kleine-König7693dec2014-03-03 09:25:52 -05001789 depends on MMU
Russell King51aaf812014-04-22 22:26:27 +01001790 select ARCH_DMA_ADDR_T_64BIT
Stefano Stabellini17b7ab82013-04-24 18:47:18 +00001791 select ARM_PSCI
Stefano Stabellini83862cc2013-10-10 13:40:44 +00001792 select SWIOTLB_XEN
Stefano Stabellini02c24332015-11-23 10:32:57 +00001793 select PARAVIRT
Stefano Stabellinieff8d642012-09-17 14:58:17 +00001794 help
1795 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
1796
Linus Torvalds1da177e2005-04-16 15:20:36 -07001797endmenu
1798
1799menu "Boot options"
1800
Grant Likely9eb8f672011-04-28 14:27:20 -06001801config USE_OF
1802 bool "Flattened Device Tree support"
Russell Kingb1b3f492012-10-06 17:12:25 +01001803 select IRQ_DOMAIN
Grant Likely9eb8f672011-04-28 14:27:20 -06001804 select OF
Grant Likely9eb8f672011-04-28 14:27:20 -06001805 help
1806 Include support for flattened device tree machine descriptions.
1807
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01001808config ATAGS
1809 bool "Support for the traditional ATAGS boot data passing" if USE_OF
1810 default y
1811 help
1812 This is the traditional way of passing data to the kernel at boot
1813 time. If you are solely relying on the flattened device tree (or
1814 the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
1815 to remove ATAGS support from your kernel binary. If unsure,
1816 leave this to y.
1817
1818config DEPRECATED_PARAM_STRUCT
1819 bool "Provide old way to pass kernel parameters"
1820 depends on ATAGS
1821 help
1822 This was deprecated in 2001 and announced to live on for 5 years.
1823 Some old boot loaders still use this way.
1824
Linus Torvalds1da177e2005-04-16 15:20:36 -07001825# Compressed boot loader in ROM. Yes, we really want to ask about
1826# TEXT and BSS so we preserve their values in the config files.
1827config ZBOOT_ROM_TEXT
1828 hex "Compressed ROM boot loader base address"
1829 default "0"
1830 help
1831 The physical address at which the ROM-able zImage is to be
1832 placed in the target. Platforms which normally make use of
1833 ROM-able zImage formats normally set this to a suitable
1834 value in their defconfig file.
1835
1836 If ZBOOT_ROM is not enabled, this has no effect.
1837
1838config ZBOOT_ROM_BSS
1839 hex "Compressed ROM boot loader BSS address"
1840 default "0"
1841 help
Dan Fandrichf8c440b2006-09-20 23:28:51 +01001842 The base address of an area of read/write memory in the target
1843 for the ROM-able zImage which must be available while the
1844 decompressor is running. It must be large enough to hold the
1845 entire decompressed kernel plus an additional 128 KiB.
1846 Platforms which normally make use of ROM-able zImage formats
1847 normally set this to a suitable value in their defconfig file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848
1849 If ZBOOT_ROM is not enabled, this has no effect.
1850
1851config ZBOOT_ROM
1852 bool "Compressed boot loader in ROM/flash"
1853 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
Russell King10968132014-01-01 11:59:44 +00001854 depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR
Linus Torvalds1da177e2005-04-16 15:20:36 -07001855 help
1856 Say Y here if you intend to execute your compressed kernel image
1857 (zImage) directly from ROM or flash. If unsure, say N.
1858
John Bonesioe2a6a3a2011-05-27 18:45:50 -04001859config ARM_APPENDED_DTB
1860 bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
Russell King10968132014-01-01 11:59:44 +00001861 depends on OF
John Bonesioe2a6a3a2011-05-27 18:45:50 -04001862 help
1863 With this option, the boot code will look for a device tree binary
1864 (DTB) appended to zImage
1865 (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1866
1867 This is meant as a backward compatibility convenience for those
1868 systems with a bootloader that can't be upgraded to accommodate
1869 the documented boot protocol using a device tree.
1870
1871 Beware that there is very little in terms of protection against
1872 this option being confused by leftover garbage in memory that might
1873 look like a DTB header after a reboot if no actual DTB is appended
1874 to zImage. Do not leave this option active in a production kernel
1875 if you don't intend to always append a DTB. Proper passing of the
1876 location into r2 of a bootloader provided DTB is always preferable
1877 to this option.
1878
Nicolas Pitreb90b9a32011-09-13 22:37:07 -04001879config ARM_ATAG_DTB_COMPAT
1880 bool "Supplement the appended DTB with traditional ATAG information"
1881 depends on ARM_APPENDED_DTB
1882 help
1883 Some old bootloaders can't be updated to a DTB capable one, yet
1884 they provide ATAGs with memory configuration, the ramdisk address,
1885 the kernel cmdline string, etc. Such information is dynamically
1886 provided by the bootloader and can't always be stored in a static
1887 DTB. To allow a device tree enabled kernel to be used with such
1888 bootloaders, this option allows zImage to extract the information
1889 from the ATAG list and store it at run time into the appended DTB.
1890
Genoud Richardd0f34a12012-06-26 16:37:59 +01001891choice
1892 prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
1893 default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1894
1895config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1896 bool "Use bootloader kernel arguments if available"
1897 help
1898 Uses the command-line options passed by the boot loader instead of
1899 the device tree bootargs property. If the boot loader doesn't provide
1900 any, the device tree bootargs property will be used.
1901
1902config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
1903 bool "Extend with bootloader kernel arguments"
1904 help
1905 The command-line arguments provided by the boot loader will be
1906 appended to the the device tree bootargs property.
1907
1908endchoice
1909
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910config CMDLINE
1911 string "Default kernel command string"
1912 default ""
1913 help
1914 On some architectures (EBSA110 and CATS), there is currently no way
1915 for the boot loader to pass arguments to the kernel. For these
1916 architectures, you should supply some command-line options at build
1917 time by entering them here. As a minimum, you should specify the
1918 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1919
Victor Boivie4394c122011-05-04 17:07:55 +01001920choice
1921 prompt "Kernel command line type" if CMDLINE != ""
1922 default CMDLINE_FROM_BOOTLOADER
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01001923 depends on ATAGS
Victor Boivie4394c122011-05-04 17:07:55 +01001924
1925config CMDLINE_FROM_BOOTLOADER
1926 bool "Use bootloader kernel arguments if available"
1927 help
1928 Uses the command-line options passed by the boot loader. If
1929 the boot loader doesn't provide any, the default kernel command
1930 string provided in CMDLINE will be used.
1931
1932config CMDLINE_EXTEND
1933 bool "Extend bootloader kernel arguments"
1934 help
1935 The command-line arguments provided by the boot loader will be
1936 appended to the default kernel command string.
1937
Alexander Holler92d20402010-02-16 19:04:53 +01001938config CMDLINE_FORCE
1939 bool "Always use the default kernel command string"
Alexander Holler92d20402010-02-16 19:04:53 +01001940 help
1941 Always use the default kernel command string, even if the boot
1942 loader passes other arguments to the kernel.
1943 This is useful if you cannot or don't want to change the
1944 command-line options your boot loader passes to the kernel.
Victor Boivie4394c122011-05-04 17:07:55 +01001945endchoice
Alexander Holler92d20402010-02-16 19:04:53 +01001946
Linus Torvalds1da177e2005-04-16 15:20:36 -07001947config XIP_KERNEL
1948 bool "Kernel Execute-In-Place from ROM"
Russell King10968132014-01-01 11:59:44 +00001949 depends on !ARM_LPAE && !ARCH_MULTIPLATFORM
Linus Torvalds1da177e2005-04-16 15:20:36 -07001950 help
1951 Execute-In-Place allows the kernel to run from non-volatile storage
1952 directly addressable by the CPU, such as NOR flash. This saves RAM
1953 space since the text section of the kernel is not loaded from flash
1954 to RAM. Read-write sections, such as the data section and stack,
1955 are still copied to RAM. The XIP kernel is not compressed since
1956 it has to run directly from flash, so it will take more space to
1957 store it. The flash address used to link the kernel object files,
1958 and for storing it, is configuration dependent. Therefore, if you
1959 say Y here, you must know the proper physical address where to
1960 store the kernel image depending on your own flash memory usage.
1961
1962 Also note that the make target becomes "make xipImage" rather than
1963 "make zImage" or "make Image". The final kernel binary to put in
1964 ROM memory will be arch/arm/boot/xipImage.
1965
1966 If unsure, say N.
1967
1968config XIP_PHYS_ADDR
1969 hex "XIP Kernel Physical Location"
1970 depends on XIP_KERNEL
1971 default "0x00080000"
1972 help
1973 This is the physical address in your flash memory the kernel will
1974 be linked for and stored to. This address is dependent on your
1975 own flash usage.
1976
Richard Purdiec587e4a2007-02-06 21:29:00 +01001977config KEXEC
1978 bool "Kexec system call (EXPERIMENTAL)"
Stephen Warren19ab4282013-06-14 16:14:14 +01001979 depends on (!SMP || PM_SLEEP_SMP)
Arnd Bergmanncb1293e2015-05-26 15:40:44 +01001980 depends on !CPU_V7M
Dave Young2965faa2015-09-09 15:38:55 -07001981 select KEXEC_CORE
Richard Purdiec587e4a2007-02-06 21:29:00 +01001982 help
1983 kexec is a system call that implements the ability to shutdown your
1984 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante01dd2fb2007-10-20 01:34:40 +02001985 but it is independent of the system firmware. And like a reboot
Richard Purdiec587e4a2007-02-06 21:29:00 +01001986 you can start any kernel with it, not just Linux.
1987
1988 It is an ongoing process to be certain the hardware in a machine
1989 is properly shutdown, so do not be surprised if this code does not
Geert Uytterhoevenbf220692013-08-20 21:38:03 +02001990 initially work for you.
Richard Purdiec587e4a2007-02-06 21:29:00 +01001991
Richard Purdie4cd9d6f2008-01-02 00:56:46 +01001992config ATAGS_PROC
1993 bool "Export atags in procfs"
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01001994 depends on ATAGS && KEXEC
Uli Luckasb98d7292008-02-22 16:45:18 +01001995 default y
Richard Purdie4cd9d6f2008-01-02 00:56:46 +01001996 help
1997 Should the atags used to boot the kernel be exported in an "atags"
1998 file in procfs. Useful with kexec.
1999
Mika Westerbergcb5d39b2010-11-18 19:14:52 +01002000config CRASH_DUMP
2001 bool "Build kdump crash kernel (EXPERIMENTAL)"
Mika Westerbergcb5d39b2010-11-18 19:14:52 +01002002 help
2003 Generate crash dump after being started by kexec. This should
2004 be normally only set in special crash dump kernels which are
2005 loaded in the main kernel with kexec-tools into a specially
2006 reserved region and then later executed after a crash by
2007 kdump/kexec. The crash dump kernel must be compiled to a
2008 memory address not used by the main kernel
2009
2010 For more details see Documentation/kdump/kdump.txt
2011
Eric Miaoe69edc792010-07-05 15:56:50 +02002012config AUTO_ZRELADDR
2013 bool "Auto calculation of the decompressed kernel image address"
Eric Miaoe69edc792010-07-05 15:56:50 +02002014 help
2015 ZRELADDR is the physical address where the decompressed kernel
2016 image will be placed. If AUTO_ZRELADDR is selected, the address
2017 will be determined at run-time by masking the current IP with
2018 0xf8000000. This assumes the zImage being placed in the first 128MB
2019 from start of memory.
2020
Roy Franz81a0bc32015-09-23 20:17:54 -07002021config EFI_STUB
2022 bool
2023
2024config EFI
2025 bool "UEFI runtime support"
2026 depends on OF && !CPU_BIG_ENDIAN && MMU && AUTO_ZRELADDR && !XIP_KERNEL
2027 select UCS2_STRING
2028 select EFI_PARAMS_FROM_FDT
2029 select EFI_STUB
2030 select EFI_ARMSTUB
2031 select EFI_RUNTIME_WRAPPERS
2032 ---help---
2033 This option provides support for runtime services provided
2034 by UEFI firmware (such as non-volatile variables, realtime
2035 clock, and platform reset). A UEFI stub is also provided to
2036 allow the kernel to be booted as an EFI application. This
2037 is only useful for kernels that may run on systems that have
2038 UEFI firmware.
2039
Linus Torvalds1da177e2005-04-16 15:20:36 -07002040endmenu
2041
Russell Kingac9d7ef2008-08-18 17:26:00 +01002042menu "CPU Power Management"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002043
Linus Torvalds1da177e2005-04-16 15:20:36 -07002044source "drivers/cpufreq/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045
Russell Kingac9d7ef2008-08-18 17:26:00 +01002046source "drivers/cpuidle/Kconfig"
2047
2048endmenu
2049
Linus Torvalds1da177e2005-04-16 15:20:36 -07002050menu "Floating point emulation"
2051
2052comment "At least one emulation must be selected"
2053
2054config FPE_NWFPE
2055 bool "NWFPE math emulation"
Dave Martin593c2522010-12-13 21:56:03 +01002056 depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
Linus Torvalds1da177e2005-04-16 15:20:36 -07002057 ---help---
2058 Say Y to include the NWFPE floating point emulator in the kernel.
2059 This is necessary to run most binaries. Linux does not currently
2060 support floating point hardware so you need to say Y here even if
2061 your machine has an FPA or floating point co-processor podule.
2062
2063 You may say N here if you are going to load the Acorn FPEmulator
2064 early in the bootup.
2065
2066config FPE_NWFPE_XP
2067 bool "Support extended precision"
Lennert Buytenhekbedf1422005-11-07 21:12:08 +00002068 depends on FPE_NWFPE
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069 help
2070 Say Y to include 80-bit support in the kernel floating-point
2071 emulator. Otherwise, only 32 and 64-bit support is compiled in.
2072 Note that gcc does not generate 80-bit operations by default,
2073 so in most cases this option only enlarges the size of the
2074 floating point emulator without any good reason.
2075
2076 You almost surely want to say N here.
2077
2078config FPE_FASTFPE
2079 bool "FastFPE math emulation (EXPERIMENTAL)"
Kees Cookd6f94fa2013-01-16 18:53:14 -08002080 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
Linus Torvalds1da177e2005-04-16 15:20:36 -07002081 ---help---
2082 Say Y here to include the FAST floating point emulator in the kernel.
2083 This is an experimental much faster emulator which now also has full
2084 precision for the mantissa. It does not support any exceptions.
2085 It is very simple, and approximately 3-6 times faster than NWFPE.
2086
2087 It should be sufficient for most programs. It may be not suitable
2088 for scientific calculations, but you have to check this for yourself.
2089 If you do not feel you need a faster FP emulation you should better
2090 choose NWFPE.
2091
2092config VFP
2093 bool "VFP-format floating point maths"
Russell Kinge399b1a2011-01-17 15:08:32 +00002094 depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
Linus Torvalds1da177e2005-04-16 15:20:36 -07002095 help
2096 Say Y to include VFP support code in the kernel. This is needed
2097 if your hardware includes a VFP unit.
2098
2099 Please see <file:Documentation/arm/VFP/release-notes.txt> for
2100 release notes and additional status information.
2101
2102 Say N if your target does not have VFP hardware.
2103
Catalin Marinas25ebee02007-09-25 15:22:24 +01002104config VFPv3
2105 bool
2106 depends on VFP
2107 default y if CPU_V7
2108
Catalin Marinasb5872db2008-01-10 19:16:17 +01002109config NEON
2110 bool "Advanced SIMD (NEON) Extension support"
2111 depends on VFPv3 && CPU_V7
2112 help
2113 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2114 Extension.
2115
Ard Biesheuvel73c132c2013-05-16 11:41:48 +02002116config KERNEL_MODE_NEON
2117 bool "Support for NEON in kernel mode"
Russell Kingc4a30c32013-09-22 11:08:50 +01002118 depends on NEON && AEABI
Ard Biesheuvel73c132c2013-05-16 11:41:48 +02002119 help
2120 Say Y to include support for NEON in kernel mode.
2121
Linus Torvalds1da177e2005-04-16 15:20:36 -07002122endmenu
2123
2124menu "Userspace binary formats"
2125
2126source "fs/Kconfig.binfmt"
2127
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128endmenu
2129
2130menu "Power management options"
2131
Russell Kingeceab4a2005-11-15 11:31:41 +00002132source "kernel/power/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133
Johannes Bergf4cb5702007-12-08 02:14:00 +01002134config ARCH_SUSPEND_POSSIBLE
Ezequiel Garcia19a05192013-08-16 10:28:24 +01002135 depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
Uwe Kleine-Königf0d75152012-02-01 10:00:00 +01002136 CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
Johannes Bergf4cb5702007-12-08 02:14:00 +01002137 def_bool y
2138
Arnd Bergmann15e0d9e2011-10-01 21:09:39 +02002139config ARM_CPU_SUSPEND
Lorenzo Pieralisi8b6f2492016-02-01 18:01:30 +01002140 def_bool PM_SLEEP || BL_SWITCHER || ARM_PSCI_FW
Lorenzo Pieralisi1b9bdf52016-02-01 18:01:29 +01002141 depends on ARCH_SUSPEND_POSSIBLE
Arnd Bergmann15e0d9e2011-10-01 21:09:39 +02002142
Sebastian Capella603fb422014-03-25 01:20:29 +01002143config ARCH_HIBERNATION_POSSIBLE
2144 bool
2145 depends on MMU
2146 default y if ARCH_SUSPEND_POSSIBLE
2147
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148endmenu
2149
Sam Ravnborgd5950b42005-07-11 21:03:49 -07002150source "net/Kconfig"
2151
Uwe Kleine-Königac251502009-08-13 21:09:21 +02002152source "drivers/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002153
Kumar Gala916f7432015-02-26 15:49:09 -06002154source "drivers/firmware/Kconfig"
2155
Linus Torvalds1da177e2005-04-16 15:20:36 -07002156source "fs/Kconfig"
2157
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158source "arch/arm/Kconfig.debug"
2159
2160source "security/Kconfig"
2161
2162source "crypto/Kconfig"
Ard Biesheuvel652ccae2015-03-10 09:47:44 +01002163if CRYPTO
2164source "arch/arm/crypto/Kconfig"
2165endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002166
2167source "lib/Kconfig"
Christoffer Dall749cf76c2013-01-20 18:28:06 -05002168
2169source "arch/arm/kvm/Kconfig"