blob: b99d25b4133e38bcd9513aa76a879b1e3565accf [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
Russell Kingb1b3f492012-10-06 17:12:25 +010053 select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
54 select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
55 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
56 select HAVE_GENERIC_DMA_COHERENT
Russell Kingb1b3f492012-10-06 17:12:25 +010057 select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
58 select HAVE_IDE if PCI || ISA || PCMCIA
Russell King87c46b62013-05-04 14:38:59 +010059 select HAVE_IRQ_TIME_ACCOUNTING
Russell Kingb1b3f492012-10-06 17:12:25 +010060 select HAVE_KERNEL_GZIP
Kyungsik Leef9b493a2013-07-08 16:01:48 -070061 select HAVE_KERNEL_LZ4
Russell Kingb1b3f492012-10-06 17:12:25 +010062 select HAVE_KERNEL_LZMA
63 select HAVE_KERNEL_LZO
64 select HAVE_KERNEL_XZ
Arnd Bergmanncb1293e2015-05-26 15:40:44 +010065 select HAVE_KPROBES if !XIP_KERNEL && !CPU_ENDIAN_BE32 && !CPU_V7M
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -080066 select HAVE_KRETPROBES if (HAVE_KPROBES)
Russell Kingb1b3f492012-10-06 17:12:25 +010067 select HAVE_MEMBLOCK
Ard Biesheuvel7d485f62014-11-24 16:54:35 +010068 select HAVE_MOD_ARCH_SPECIFIC
Russell Kingb1b3f492012-10-06 17:12:25 +010069 select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
Wang Nan0dc016d2015-01-09 14:37:36 +080070 select HAVE_OPTPROBES if !THUMB2_KERNEL
Jamie Iles7ada1892010-02-02 20:24:58 +010071 select HAVE_PERF_EVENTS
Will Deacon49863892013-09-26 12:36:35 +010072 select HAVE_PERF_REGS
73 select HAVE_PERF_USER_STACK_DUMP
Steve Cappera0ad5492014-10-09 15:29:18 -070074 select HAVE_RCU_TABLE_FREE if (SMP && ARM_LPAE)
Will Deacone513f8b2010-06-25 12:24:53 +010075 select HAVE_REGS_AND_STACK_ACCESS_API
Russell Kingb1b3f492012-10-06 17:12:25 +010076 select HAVE_SYSCALL_TRACEPOINTS
Catalin Marinasaf1839e2012-10-08 16:28:08 -070077 select HAVE_UID16
Kevin Hilman31c1fc82013-09-16 15:28:22 -070078 select HAVE_VIRT_CPU_ACCOUNTING_GEN
Thomas Gleixnerda0ec6f2013-08-14 20:43:17 +010079 select IRQ_FORCED_THREADING
Russell King171b3f02013-09-12 21:24:42 +010080 select MODULES_USE_ELF_REL
Santosh Shilimkar84f452b2013-06-30 00:28:46 -040081 select NO_BOOTMEM
Arnd Bergmannaa7d5f12015-11-19 13:20:54 +010082 select OF_EARLY_FLATTREE if OF
83 select OF_RESERVED_MEM if OF
Russell King171b3f02013-09-12 21:24:42 +010084 select OLD_SIGACTION
85 select OLD_SIGSUSPEND3
Russell Kingb1b3f492012-10-06 17:12:25 +010086 select PERF_USE_VMALLOC
87 select RTC_LIB
88 select SYS_SUPPORTS_APM_EMULATION
Russell King171b3f02013-09-12 21:24:42 +010089 # Above selects are sorted alphabetically; please add new ones
90 # according to that. Thanks.
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 help
92 The ARM series is a line of low-power-consumption RISC chip designs
Martin Michlmayrf6c89652006-02-08 21:09:07 +000093 licensed by ARM Ltd and targeted at embedded applications and
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
Martin Michlmayrf6c89652006-02-08 21:09:07 +000095 manufactured, but legacy ARM-based PC hardware remains popular in
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 Europe. There is an ARM Linux project with a web page at
97 <http://www.arm.linux.org.uk/>.
98
Russell King74facff2011-06-02 11:16:22 +010099config ARM_HAS_SG_CHAIN
Laura Abbott308c09f2014-08-08 14:23:25 -0700100 select ARCH_HAS_SG_CHAIN
Russell King74facff2011-06-02 11:16:22 +0100101 bool
102
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200103config NEED_SG_DMA_LENGTH
104 bool
105
106config ARM_DMA_USE_IOMMU
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200107 bool
Russell Kingb1b3f492012-10-06 17:12:25 +0100108 select ARM_HAS_SG_CHAIN
109 select NEED_SG_DMA_LENGTH
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200110
Seung-Woo Kim60460ab2013-02-06 13:21:14 +0900111if ARM_DMA_USE_IOMMU
112
113config ARM_DMA_IOMMU_ALIGNMENT
114 int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
115 range 4 9
116 default 8
117 help
118 DMA mapping framework by default aligns all buffers to the smallest
119 PAGE_SIZE order which is greater than or equal to the requested buffer
120 size. This works well for buffers up to a few hundreds kilobytes, but
121 for larger buffers it just a waste of address space. Drivers which has
122 relatively small addressing window (like 64Mib) might run out of
123 virtual space with just a few allocations.
124
125 With this parameter you can specify the maximum PAGE_SIZE order for
126 DMA IOMMU buffers. Larger buffers will be aligned only to this
127 specified order. The order is expressed as a power of two multiplied
128 by the PAGE_SIZE.
129
130endif
131
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +0100132config MIGHT_HAVE_PCI
133 bool
134
Ralf Baechle75e71532007-02-09 17:08:58 +0000135config SYS_SUPPORTS_APM_EMULATION
136 bool
137
Linus Walleijbc581772009-09-15 17:30:37 +0100138config HAVE_TCM
139 bool
140 select GENERIC_ALLOCATOR
141
Russell Kinge119bff2010-01-10 17:23:29 +0000142config HAVE_PROC_CPU
143 bool
144
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700145config NO_IOPORT_MAP
Al Viro5ea81762007-02-11 15:41:31 +0000146 bool
Al Viro5ea81762007-02-11 15:41:31 +0000147
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148config EISA
149 bool
150 ---help---
151 The Extended Industry Standard Architecture (EISA) bus was
152 developed as an open alternative to the IBM MicroChannel bus.
153
154 The EISA bus provided some of the features of the IBM MicroChannel
155 bus while maintaining backward compatibility with cards made for
156 the older ISA bus. The EISA bus saw limited use between 1988 and
157 1995 when it was made obsolete by the PCI bus.
158
159 Say Y here if you are building a kernel for an EISA-based machine.
160
161 Otherwise, say N.
162
163config SBUS
164 bool
165
Russell Kingf16fb1e2007-04-28 09:59:37 +0100166config STACKTRACE_SUPPORT
167 bool
168 default y
169
170config LOCKDEP_SUPPORT
171 bool
172 default y
173
Russell King7ad1bcb2006-08-27 12:07:02 +0100174config TRACE_IRQFLAGS_SUPPORT
175 bool
Arnd Bergmanncb1293e2015-05-26 15:40:44 +0100176 default !CPU_V7M
Russell King7ad1bcb2006-08-27 12:07:02 +0100177
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178config RWSEM_XCHGADD_ALGORITHM
179 bool
Will Deacon8a874112014-05-02 17:06:19 +0100180 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
David Howellsf0d1b0b2006-12-08 02:37:49 -0800182config ARCH_HAS_ILOG2_U32
183 bool
David Howellsf0d1b0b2006-12-08 02:37:49 -0800184
185config ARCH_HAS_ILOG2_U64
186 bool
David Howellsf0d1b0b2006-12-08 02:37:49 -0800187
Eduardo Valentin4a1b5732013-06-13 22:58:52 +0100188config ARCH_HAS_BANDGAP
189 bool
190
Stefan Agnera5f4c562015-08-13 00:01:52 +0100191config FIX_EARLYCON_MEM
192 def_bool y if MMU
193
Akinobu Mitab89c3b12006-03-26 01:39:19 -0800194config GENERIC_HWEIGHT
195 bool
196 default y
197
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198config GENERIC_CALIBRATE_DELAY
199 bool
200 default y
201
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100202config ARCH_MAY_HAVE_PC_FDC
203 bool
204
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800205config ZONE_DMA
206 bool
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800207
FUJITA Tomonoriccd7ab72010-03-10 15:23:23 -0800208config NEED_DMA_MAP_STATE
209 def_bool y
210
David A. Longc7edc9e2014-03-07 11:23:04 -0500211config ARCH_SUPPORTS_UPROBES
212 def_bool y
213
Rob Herring58af4a22012-03-20 14:33:01 -0500214config ARCH_HAS_DMA_SET_COHERENT_MASK
215 bool
216
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217config GENERIC_ISA_DMA
218 bool
219
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220config FIQ
221 bool
222
Rob Herring13a50452012-02-07 09:28:22 -0600223config NEED_RET_TO_USER
224 bool
225
Al Viro034d2f52005-12-19 16:27:59 -0500226config ARCH_MTD_XIP
227 bool
228
Hyok S. Choic760fc12006-03-27 15:18:50 +0100229config VECTORS_BASE
230 hex
Hyok S. Choi6afd6fa2006-09-28 21:46:34 +0900231 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
Hyok S. Choic760fc12006-03-27 15:18:50 +0100232 default DRAM_BASE if REMAP_VECTORS_TO_RAM
233 default 0x00000000
234 help
Russell King19accfd2013-07-04 11:40:32 +0100235 The base address of exception vectors. This must be two pages
236 in size.
Hyok S. Choic760fc12006-03-27 15:18:50 +0100237
Russell Kingdc21af92011-01-04 19:09:43 +0000238config ARM_PATCH_PHYS_VIRT
Russell Kingc1beced2011-08-10 10:23:45 +0100239 bool "Patch physical to virtual translations at runtime" if EMBEDDED
240 default y
Nicolas Pitreb511d752011-02-21 06:53:35 +0100241 depends on !XIP_KERNEL && MMU
Russell Kingdc21af92011-01-04 19:09:43 +0000242 help
Russell King111e9a52011-05-12 10:02:42 +0100243 Patch phys-to-virt and virt-to-phys translation functions at
244 boot and module load time according to the position of the
245 kernel in system memory.
Russell Kingdc21af92011-01-04 19:09:43 +0000246
Russell King111e9a52011-05-12 10:02:42 +0100247 This can only be used with non-XIP MMU kernels where the base
Nicolas Pitredaece592011-08-12 00:14:29 +0100248 of physical memory is at a 16MB boundary.
Russell Kingdc21af92011-01-04 19:09:43 +0000249
Russell Kingc1beced2011-08-10 10:23:45 +0100250 Only disable this option if you know that you do not require
251 this feature (eg, building a kernel for a single machine) and
252 you need to shrink the kernel to the minimal size.
253
Rob Herringc334bc12012-03-04 22:03:33 -0600254config NEED_MACH_IO_H
255 bool
256 help
257 Select this when mach/io.h is required to provide special
258 definitions for this platform. The need for mach/io.h should
259 be avoided when possible.
260
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400261config NEED_MACH_MEMORY_H
Nicolas Pitre1b9f95f2011-07-05 22:52:51 -0400262 bool
Russell King111e9a52011-05-12 10:02:42 +0100263 help
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400264 Select this when mach/memory.h is required to provide special
265 definitions for this platform. The need for mach/memory.h should
266 be avoided when possible.
Nicolas Pitre1b9f95f2011-07-05 22:52:51 -0400267
268config PHYS_OFFSET
Nicolas Pitre974c0722011-12-02 23:09:42 +0100269 hex "Physical address of main memory" if MMU
Uwe Kleine-Königc6f54a92014-07-23 20:37:43 +0100270 depends on !ARM_PATCH_PHYS_VIRT
Nicolas Pitre974c0722011-12-02 23:09:42 +0100271 default DRAM_BASE if !MMU
Uwe Kleine-Königc6f54a92014-07-23 20:37:43 +0100272 default 0x00000000 if ARCH_EBSA110 || \
Uwe Kleine-Königc6f54a92014-07-23 20:37:43 +0100273 ARCH_FOOTBRIDGE || \
274 ARCH_INTEGRATOR || \
275 ARCH_IOP13XX || \
276 ARCH_KS8695 || \
277 (ARCH_REALVIEW && !REALVIEW_HIGH_PHYS_OFFSET)
278 default 0x10000000 if ARCH_OMAP1 || ARCH_RPC
279 default 0x20000000 if ARCH_S5PV210
280 default 0x70000000 if REALVIEW_HIGH_PHYS_OFFSET
H Hartley Sweetenb8824c92015-06-15 10:35:06 -0700281 default 0xc0000000 if ARCH_SA1100
Nicolas Pitre1b9f95f2011-07-05 22:52:51 -0400282 help
283 Please provide the physical address corresponding to the
284 location of main memory in your system.
Russell Kingcada3c02011-01-04 19:39:29 +0000285
Simon Glass87e040b2011-08-16 23:44:26 +0100286config GENERIC_BUG
287 def_bool y
288 depends on BUG
289
Kirill A. Shutemov1bcad262015-04-14 15:45:42 -0700290config PGTABLE_LEVELS
291 int
292 default 3 if ARM_LPAE
293 default 2
294
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295source "init/Kconfig"
296
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700297source "kernel/Kconfig.freezer"
298
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299menu "System Type"
300
Hyok S. Choi3c427972009-07-24 12:35:00 +0100301config MMU
302 bool "MMU-based Paged Memory Management Support"
303 default y
304 help
305 Select if you want MMU-based virtualised addressing space
306 support by paged memory management. If unsure, say 'Y'.
307
Daniel Cashmane0c25d92016-01-14 15:19:57 -0800308config ARCH_MMAP_RND_BITS_MIN
309 default 8
310
311config ARCH_MMAP_RND_BITS_MAX
312 default 14 if PAGE_OFFSET=0x40000000
313 default 15 if PAGE_OFFSET=0x80000000
314 default 16
315
Russell Kingccf50e22010-03-15 19:03:06 +0000316#
317# The "ARM system type" choice list is ordered alphabetically by option
318# text. Please add new entries in the option alphabetic order.
319#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320choice
321 prompt "ARM system type"
Arnd Bergmann70722802015-12-17 17:45:47 +0100322 default ARM_SINGLE_ARMV7M if !MMU
Arnd Bergmann1420b222013-02-14 13:33:36 +0100323 default ARCH_MULTIPLATFORM if MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324
Rob Herring387798b2012-09-06 13:41:12 -0500325config ARCH_MULTIPLATFORM
326 bool "Allow multiple platforms to be selected"
Russell Kingb1b3f492012-10-06 17:12:25 +0100327 depends on MMU
Rob Herringddb902c2013-11-22 09:29:37 -0600328 select ARCH_WANT_OPTIONAL_GPIOLIB
Olof Johansson42dc8362014-03-09 12:46:59 -0700329 select ARM_HAS_SG_CHAIN
Rob Herring387798b2012-09-06 13:41:12 -0500330 select ARM_PATCH_PHYS_VIRT
331 select AUTO_ZRELADDR
Rob Herring6d0add42014-04-16 08:42:13 -0500332 select CLKSRC_OF
Dinh Nguyen66314222012-07-18 16:07:18 -0600333 select COMMON_CLK
Rob Herringddb902c2013-11-22 09:29:37 -0600334 select GENERIC_CLOCKEVENTS
Will Deacon08d38be2014-05-27 23:26:35 +0100335 select MIGHT_HAVE_PCI
Rob Herring387798b2012-09-06 13:41:12 -0500336 select MULTI_IRQ_HANDLER
Dinh Nguyen66314222012-07-18 16:07:18 -0600337 select SPARSE_IRQ
338 select USE_OF
Dinh Nguyen66314222012-07-18 16:07:18 -0600339
Stefan Agner9c77bc42015-05-20 00:03:51 +0200340config ARM_SINGLE_ARMV7M
341 bool "ARMv7-M based platforms (Cortex-M0/M3/M4)"
342 depends on !MMU
343 select ARCH_WANT_OPTIONAL_GPIOLIB
344 select ARM_NVIC
Stefan Agner499f1642015-05-21 00:35:44 +0200345 select AUTO_ZRELADDR
Stefan Agner9c77bc42015-05-20 00:03:51 +0200346 select CLKSRC_OF
347 select COMMON_CLK
348 select CPU_V7M
349 select GENERIC_CLOCKEVENTS
350 select NO_IOPORT_MAP
351 select SPARSE_IRQ
352 select USE_OF
353
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100354
Russell King93e22562012-10-12 14:20:52 +0100355config ARCH_CLPS711X
356 bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +0400357 select ARCH_REQUIRE_GPIOLIB
Alexander Shiyanea7d1bc2012-11-17 17:57:11 +0400358 select AUTO_ZRELADDR
Alexander Shiyanc99f72a2013-05-13 21:07:32 +0400359 select CLKSRC_MMIO
Russell King93e22562012-10-12 14:20:52 +0100360 select COMMON_CLK
361 select CPU_ARM720T
Alexander Shiyan4a8355c2012-10-10 19:45:27 +0400362 select GENERIC_CLOCKEVENTS
Alexander Shiyan65976192013-05-13 21:07:36 +0400363 select MFD_SYSCON
Alexander Shiyane4e3a372014-08-19 16:31:15 +0400364 select SOC_BUS
Russell King93e22562012-10-12 14:20:52 +0100365 help
366 Support for Cirrus Logic 711x/721x/731x based boards.
367
Russell King788c9702009-04-26 14:21:59 +0100368config ARCH_GEMINI
369 bool "Cortina Systems Gemini"
Russell King788c9702009-04-26 14:21:59 +0100370 select ARCH_REQUIRE_GPIOLIB
Linus Walleijf3372c02013-10-01 12:57:20 +0200371 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100372 select CPU_FA526
Linus Walleijf3372c02013-10-01 12:57:20 +0200373 select GENERIC_CLOCKEVENTS
Russell King788c9702009-04-26 14:21:59 +0100374 help
375 Support for the Cortina Systems Gemini family SoCs
376
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377config ARCH_EBSA110
378 bool "EBSA-110"
Russell Kingb1b3f492012-10-06 17:12:25 +0100379 select ARCH_USES_GETTIMEOFFSET
Russell Kingc7508152008-10-26 10:55:14 +0000380 select CPU_SA110
Russell Kingf7e68bb2005-05-05 14:49:01 +0100381 select ISA
Rob Herringc334bc12012-03-04 22:03:33 -0600382 select NEED_MACH_IO_H
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400383 select NEED_MACH_MEMORY_H
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700384 select NO_IOPORT_MAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 help
386 This is an evaluation board for the StrongARM processor available
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000387 from Digital. It has limited hardware on-board, including an
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 Ethernet interface, two PCMCIA sockets, two serial ports and a
389 parallel port.
390
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000391config ARCH_EP93XX
392 bool "EP93xx-based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100393 select ARCH_HAS_HOLES_MEMORYMODEL
394 select ARCH_REQUIRE_GPIOLIB
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000395 select ARM_AMBA
H Hartley Sweetenb8824c92015-06-15 10:35:06 -0700396 select ARM_PATCH_PHYS_VIRT
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000397 select ARM_VIC
H Hartley Sweetenb8824c92015-06-15 10:35:06 -0700398 select AUTO_ZRELADDR
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100399 select CLKDEV_LOOKUP
Linus Walleij000bc172015-06-15 14:34:03 +0200400 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100401 select CPU_ARM920T
Linus Walleij000bc172015-06-15 14:34:03 +0200402 select GENERIC_CLOCKEVENTS
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000403 help
404 This enables support for the Cirrus EP93xx series of CPUs.
405
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406config ARCH_FOOTBRIDGE
407 bool "FootBridge"
Russell Kingc7508152008-10-26 10:55:14 +0000408 select CPU_SA110
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 select FOOTBRIDGE
Russell King4e8d7632011-01-28 21:00:39 +0000410 select GENERIC_CLOCKEVENTS
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200411 select HAVE_IDE
Rob Herring8ef6e622012-03-01 20:48:12 -0600412 select NEED_MACH_IO_H if !MMU
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400413 select NEED_MACH_MEMORY_H
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000414 help
415 Support for systems based on the DC21285 companion chip
416 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100418config ARCH_NETX
419 bool "Hilscher NetX based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100420 select ARM_VIC
Russell King234b6ced2011-05-08 14:09:47 +0100421 select CLKSRC_MMIO
Russell Kingc7508152008-10-26 10:55:14 +0000422 select CPU_ARM926T
Uwe Kleine-König2fcfe6b2008-12-09 21:57:24 +0100423 select GENERIC_CLOCKEVENTS
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000424 help
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100425 This enables support for systems based on the Hilscher NetX Soc
426
Russell King3b938be2007-05-12 11:25:44 +0100427config ARCH_IOP13XX
428 bool "IOP13xx-based"
429 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100430 select CPU_XSC3
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400431 select NEED_MACH_MEMORY_H
Rob Herring13a50452012-02-07 09:28:22 -0600432 select NEED_RET_TO_USER
Russell Kingb1b3f492012-10-06 17:12:25 +0100433 select PCI
434 select PLAT_IOP
435 select VMSPLIT_1G
Thomas Gleixner37ebbcf2014-05-07 15:44:04 +0000436 select SPARSE_IRQ
Russell King3b938be2007-05-12 11:25:44 +0100437 help
438 Support for Intel's IOP13XX (XScale) family of processors.
439
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100440config ARCH_IOP32X
441 bool "IOP32x-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100442 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100443 select ARCH_REQUIRE_GPIOLIB
Russell Kingc7508152008-10-26 10:55:14 +0000444 select CPU_XSCALE
Linus Walleije9004f52013-09-09 11:59:51 +0200445 select GPIO_IOP
Rob Herring13a50452012-02-07 09:28:22 -0600446 select NEED_RET_TO_USER
Russell Kingf7e68bb2005-05-05 14:49:01 +0100447 select PCI
Russell Kingb1b3f492012-10-06 17:12:25 +0100448 select PLAT_IOP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000449 help
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100450 Support for Intel's 80219 and IOP32X (XScale) family of
451 processors.
452
453config ARCH_IOP33X
454 bool "IOP33x-based"
455 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100456 select ARCH_REQUIRE_GPIOLIB
Russell Kingc7508152008-10-26 10:55:14 +0000457 select CPU_XSCALE
Linus Walleije9004f52013-09-09 11:59:51 +0200458 select GPIO_IOP
Rob Herring13a50452012-02-07 09:28:22 -0600459 select NEED_RET_TO_USER
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100460 select PCI
Russell Kingb1b3f492012-10-06 17:12:25 +0100461 select PLAT_IOP
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100462 help
463 Support for Intel's IOP33X (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464
Russell King3b938be2007-05-12 11:25:44 +0100465config ARCH_IXP4XX
466 bool "IXP4xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100467 depends on MMU
Rob Herring58af4a22012-03-20 14:33:01 -0500468 select ARCH_HAS_DMA_SET_COHERENT_MASK
Russell Kingb1b3f492012-10-06 17:12:25 +0100469 select ARCH_REQUIRE_GPIOLIB
Russell King51aaf812014-04-22 22:26:27 +0100470 select ARCH_SUPPORTS_BIG_ENDIAN
Russell King234b6ced2011-05-08 14:09:47 +0100471 select CLKSRC_MMIO
Russell Kingc7508152008-10-26 10:55:14 +0000472 select CPU_XSCALE
Russell Kingb1b3f492012-10-06 17:12:25 +0100473 select DMABOUNCE if PCI
Russell King3b938be2007-05-12 11:25:44 +0100474 select GENERIC_CLOCKEVENTS
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +0100475 select MIGHT_HAVE_PCI
Rob Herringc334bc12012-03-04 22:03:33 -0600476 select NEED_MACH_IO_H
Florian Fainelli9296d942013-04-09 14:29:26 +0200477 select USB_EHCI_BIG_ENDIAN_DESC
Russell King171b3f02013-09-12 21:24:42 +0100478 select USB_EHCI_BIG_ENDIAN_MMIO
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100479 help
Russell King3b938be2007-05-12 11:25:44 +0100480 Support for Intel's IXP4XX (XScale) family of processors.
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100481
Saeed Bisharaedabd382009-08-06 15:12:43 +0300482config ARCH_DOVE
483 bool "Marvell Dove"
Saeed Bisharaedabd382009-08-06 15:12:43 +0300484 select ARCH_REQUIRE_GPIOLIB
Sebastian Hesselbarth756b2532013-05-02 19:56:12 +0100485 select CPU_PJ4
Saeed Bisharaedabd382009-08-06 15:12:43 +0300486 select GENERIC_CLOCKEVENTS
Russell King0f81bd42012-09-09 20:34:13 +0100487 select MIGHT_HAVE_PCI
Arnd Bergmannb8cd3372015-12-02 22:27:04 +0100488 select MULTI_IRQ_HANDLER
Russell King171b3f02013-09-12 21:24:42 +0100489 select MVEBU_MBUS
Sebastian Hesselbarth9139acd2012-11-19 10:39:55 +0100490 select PINCTRL
491 select PINCTRL_DOVE
Thomas Petazzoniabcda1d2012-09-11 14:27:27 +0200492 select PLAT_ORION_LEGACY
Arnd Bergmann5cdbe5d2015-12-02 22:27:05 +0100493 select SPARSE_IRQ
Russell Kingc5d431e2015-12-08 10:58:09 +0000494 select PM_GENERIC_DOMAINS if PM
Saeed Bisharaedabd382009-08-06 15:12:43 +0300495 help
496 Support for the Marvell Dove SoC 88AP510
497
Andrew Victorc53c9cf2007-05-11 21:01:28 +0100498config ARCH_KS8695
499 bool "Micrel/Kendin KS8695"
Hartley Sweeten98830bc2010-05-17 17:18:10 +0100500 select ARCH_REQUIRE_GPIOLIB
Linus Walleijc7e783d2012-08-29 20:27:22 +0200501 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100502 select CPU_ARM922T
Linus Walleijc7e783d2012-08-29 20:27:22 +0200503 select GENERIC_CLOCKEVENTS
Russell Kingb1b3f492012-10-06 17:12:25 +0100504 select NEED_MACH_MEMORY_H
Andrew Victorc53c9cf2007-05-11 21:01:28 +0100505 help
506 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
507 System-on-Chip devices.
508
Russell King788c9702009-04-26 14:21:59 +0100509config ARCH_W90X900
510 bool "Nuvoton W90X900 CPU"
wanzongshunc52d3d62009-06-10 15:49:32 +0100511 select ARCH_REQUIRE_GPIOLIB
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100512 select CLKDEV_LOOKUP
Russell King6fa5d5f2011-05-08 15:34:39 +0100513 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100514 select CPU_ARM926T
wanzongshun58b53692009-08-14 15:36:44 +0100515 select GENERIC_CLOCKEVENTS
Lennert Buytenhek777f9be2008-06-22 22:45:02 +0200516 help
wanzongshuna8bc4ea2009-08-14 15:38:29 +0100517 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
518 At present, the w90x900 has been renamed nuc900, regarding
519 the ARM series product line, you can login the following
520 link address to know more.
521
522 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
523 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
Tzachi Perelstein585cf172007-10-23 15:14:41 -0400524
Russell King93e22562012-10-12 14:20:52 +0100525config ARCH_LPC32XX
526 bool "NXP LPC32XX"
527 select ARCH_REQUIRE_GPIOLIB
528 select ARM_AMBA
Russell King40737232011-01-06 22:32:52 +0000529 select CLKDEV_LOOKUP
Vladimir Zapolskiyc227f122015-11-20 03:05:10 +0200530 select CLKSRC_LPC32XX
531 select COMMON_CLK
Russell King93e22562012-10-12 14:20:52 +0100532 select CPU_ARM926T
533 select GENERIC_CLOCKEVENTS
Vladimir Zapolskiy8cb17b52016-04-25 04:00:38 +0300534 select MULTI_IRQ_HANDLER
535 select SPARSE_IRQ
Russell King93e22562012-10-12 14:20:52 +0100536 select USE_OF
537 help
538 Support for the NXP LPC32XX family of processors
539
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540config ARCH_PXA
eric miao2c8086a2007-09-11 19:13:17 -0700541 bool "PXA2xx/PXA3xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100542 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100543 select ARCH_MTD_XIP
544 select ARCH_REQUIRE_GPIOLIB
545 select ARM_CPU_SUSPEND if PM
546 select AUTO_ZRELADDR
Robert Jarzmika1c0a6a2015-02-07 22:54:03 +0100547 select COMMON_CLK
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100548 select CLKDEV_LOOKUP
Daniel Lezcano389d9b52015-10-09 15:48:38 +0200549 select CLKSRC_PXA
Russell King234b6ced2011-05-08 14:09:47 +0100550 select CLKSRC_MMIO
Robert Jarzmik6f6caea2014-07-14 18:52:03 +0200551 select CLKSRC_OF
Arnd Bergmann2f202862016-01-29 15:06:29 +0100552 select CPU_XSCALE if !CPU_XSC3
Eric Miao981d0f32007-07-24 01:22:43 +0100553 select GENERIC_CLOCKEVENTS
Haojian Zhuang157d2642011-10-17 20:37:52 +0800554 select GPIO_PXA
Russell Kingb1b3f492012-10-06 17:12:25 +0100555 select HAVE_IDE
Robert Jarzmikd6cf30c2015-02-14 22:41:56 +0100556 select IRQ_DOMAIN
Russell Kingb1b3f492012-10-06 17:12:25 +0100557 select MULTI_IRQ_HANDLER
Eric Miaobd5ce432009-01-20 12:06:01 +0800558 select PLAT_PXA
Haojian Zhuang6ac6b812010-08-20 15:23:59 +0800559 select SPARSE_IRQ
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000560 help
eric miao2c8086a2007-09-11 19:13:17 -0700561 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562
563config ARCH_RPC
564 bool "RiscPC"
Russell King868e87c2015-09-28 10:31:50 +0100565 depends on MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 select ARCH_ACORN
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100567 select ARCH_MAY_HAVE_PC_FDC
Russell King07f841b2008-10-01 17:11:06 +0100568 select ARCH_SPARSEMEM_ENABLE
John Stultz5cfc8ee2010-03-24 00:22:36 +0000569 select ARCH_USES_GETTIMEOFFSET
Arnd Bergmannfa04e202014-02-26 17:39:12 +0100570 select CPU_SA110
Russell Kingb1b3f492012-10-06 17:12:25 +0100571 select FIQ
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200572 select HAVE_IDE
Russell Kingb1b3f492012-10-06 17:12:25 +0100573 select HAVE_PATA_PLATFORM
574 select ISA_DMA_API
Rob Herringc334bc12012-03-04 22:03:33 -0600575 select NEED_MACH_IO_H
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400576 select NEED_MACH_MEMORY_H
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700577 select NO_IOPORT_MAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 help
579 On the Acorn Risc-PC, Linux can support the internal IDE disk and
580 CD-ROM interface, serial and parallel port, and the floppy drive.
581
582config ARCH_SA1100
583 bool "SA1100-based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100584 select ARCH_MTD_XIP
Michael Buesch7444a722008-07-25 01:46:11 -0700585 select ARCH_REQUIRE_GPIOLIB
Russell Kingb1b3f492012-10-06 17:12:25 +0100586 select ARCH_SPARSEMEM_ENABLE
587 select CLKDEV_LOOKUP
588 select CLKSRC_MMIO
Daniel Lezcano389d9b52015-10-09 15:48:38 +0200589 select CLKSRC_PXA
590 select CLKSRC_OF if OF
Russell Kingb1b3f492012-10-06 17:12:25 +0100591 select CPU_FREQ
592 select CPU_SA1100
593 select GENERIC_CLOCKEVENTS
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200594 select HAVE_IDE
Dmitry Eremin-Solenikov1eca42b2014-11-28 15:56:54 +0100595 select IRQ_DOMAIN
Russell Kingb1b3f492012-10-06 17:12:25 +0100596 select ISA
Dmitry Eremin-Solenikovaffcab32014-11-28 15:55:16 +0100597 select MULTI_IRQ_HANDLER
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400598 select NEED_MACH_MEMORY_H
Russell King375dec92012-02-23 14:29:33 +0100599 select SPARSE_IRQ
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000600 help
601 Support for StrongARM 11x0 based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900603config ARCH_S3C24XX
604 bool "Samsung S3C24XX SoCs"
Kukjin Kim53650432013-04-04 09:04:30 +0900605 select ARCH_REQUIRE_GPIOLIB
Arnd Bergmann335cce72014-03-13 14:11:16 +0100606 select ATAGS
Russell Kingb1b3f492012-10-06 17:12:25 +0100607 select CLKDEV_LOOKUP
Tomasz Figa42805062013-04-28 02:25:01 +0200608 select CLKSRC_SAMSUNG_PWM
Romain Naour7f78b6e2013-01-09 18:47:04 -0800609 select GENERIC_CLOCKEVENTS
Tomasz Figa880cf072013-06-19 01:22:20 +0900610 select GPIO_SAMSUNG
Kukjin Kim20676c12010-11-13 16:08:32 +0900611 select HAVE_S3C2410_I2C if I2C
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900612 select HAVE_S3C2410_WATCHDOG if WATCHDOG
Russell Kingb1b3f492012-10-06 17:12:25 +0100613 select HAVE_S3C_RTC if RTC_CLASS
Heiko Stuebner17453dd2013-03-07 12:38:25 +0900614 select MULTI_IRQ_HANDLER
Rob Herringc334bc12012-03-04 22:03:33 -0600615 select NEED_MACH_IO_H
Tomasz Figacd8dc7a2013-06-15 09:01:49 +0900616 select SAMSUNG_ATAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 help
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900618 Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
619 and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
620 (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
621 Samsung SMDK2410 development board (and derivatives).
Ben Dooks63b1f512010-04-30 16:32:26 +0900622
Kevin Hilman7c6337e2007-04-30 19:37:19 +0100623config ARCH_DAVINCI
624 bool "TI DaVinci"
Russell Kingb1b3f492012-10-06 17:12:25 +0100625 select ARCH_HAS_HOLES_MEMORYMODEL
David Brownelldce11152008-09-07 23:41:04 -0700626 select ARCH_REQUIRE_GPIOLIB
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100627 select CLKDEV_LOOKUP
Arnd Bergmannce32c5c2016-02-01 21:35:57 +0100628 select CPU_ARM926T
David Brownell20e99692009-05-07 09:31:42 -0700629 select GENERIC_ALLOCATOR
Russell Kingb1b3f492012-10-06 17:12:25 +0100630 select GENERIC_CLOCKEVENTS
Russell Kingdc7ad3b2011-05-22 10:01:21 +0100631 select GENERIC_IRQ_CHIP
Russell Kingb1b3f492012-10-06 17:12:25 +0100632 select HAVE_IDE
Sekhar Nori689e3312012-08-28 15:27:52 +0530633 select USE_OF
Russell Kingb1b3f492012-10-06 17:12:25 +0100634 select ZONE_DMA
Kevin Hilman7c6337e2007-04-30 19:37:19 +0100635 help
636 Support for TI's DaVinci platform.
637
Tony Lindgrena0694862013-01-11 11:24:20 -0800638config ARCH_OMAP1
639 bool "TI OMAP1"
Arnd Bergmann00a36692012-06-07 18:50:51 -0600640 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100641 select ARCH_HAS_HOLES_MEMORYMODEL
Tony Lindgrena0694862013-01-11 11:24:20 -0800642 select ARCH_OMAP
Alexey Charkov21f47fb2010-12-23 13:11:21 +0100643 select ARCH_REQUIRE_GPIOLIB
Tony Priske9a91de2012-08-03 21:00:06 +1200644 select CLKDEV_LOOKUP
viresh kumarcee37e52010-04-01 12:31:05 +0100645 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100646 select GENERIC_CLOCKEVENTS
Tony Lindgrena0694862013-01-11 11:24:20 -0800647 select GENERIC_IRQ_CHIP
Tony Lindgrena0694862013-01-11 11:24:20 -0800648 select HAVE_IDE
649 select IRQ_DOMAIN
Tony Lindgrenb6943312015-05-20 09:01:21 -0700650 select MULTI_IRQ_HANDLER
Tony Lindgrena0694862013-01-11 11:24:20 -0800651 select NEED_MACH_IO_H if PCCARD
652 select NEED_MACH_MEMORY_H
Tony Lindgren685e2d02015-05-20 09:01:21 -0700653 select SPARSE_IRQ
Alexey Charkov21f47fb2010-12-23 13:11:21 +0100654 help
Tony Lindgrena0694862013-01-11 11:24:20 -0800655 Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
Binghua Duan02c981c2011-07-08 17:40:12 +0800656
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657endchoice
658
Rob Herring387798b2012-09-06 13:41:12 -0500659menu "Multiple platform selection"
660 depends on ARCH_MULTIPLATFORM
661
662comment "CPU Core family selection"
663
Arnd Bergmannf8afae42014-03-25 22:19:00 +0100664config ARCH_MULTI_V4
665 bool "ARMv4 based platforms (FA526)"
666 depends on !ARCH_MULTI_V6_V7
667 select ARCH_MULTI_V4_V5
668 select CPU_FA526
669
Rob Herring387798b2012-09-06 13:41:12 -0500670config ARCH_MULTI_V4T
671 bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
Rob Herring387798b2012-09-06 13:41:12 -0500672 depends on !ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100673 select ARCH_MULTI_V4_V5
Arnd Bergmann24e860f2013-06-03 15:38:58 +0200674 select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
675 CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
676 CPU_ARM925T || CPU_ARM940T)
Rob Herring387798b2012-09-06 13:41:12 -0500677
678config ARCH_MULTI_V5
679 bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
Rob Herring387798b2012-09-06 13:41:12 -0500680 depends on !ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100681 select ARCH_MULTI_V4_V5
Andrew Lunn12567bb2014-02-22 20:14:54 +0100682 select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \
Arnd Bergmann24e860f2013-06-03 15:38:58 +0200683 CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
684 CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
Rob Herring387798b2012-09-06 13:41:12 -0500685
686config ARCH_MULTI_V4_V5
687 bool
688
689config ARCH_MULTI_V6
Stephen Boyd8dda05c2013-03-04 15:19:19 -0800690 bool "ARMv6 based platforms (ARM11)"
Rob Herring387798b2012-09-06 13:41:12 -0500691 select ARCH_MULTI_V6_V7
Rob Herring42f47542014-01-31 14:26:04 -0600692 select CPU_V6K
Rob Herring387798b2012-09-06 13:41:12 -0500693
694config ARCH_MULTI_V7
Stephen Boyd8dda05c2013-03-04 15:19:19 -0800695 bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
Rob Herring387798b2012-09-06 13:41:12 -0500696 default y
697 select ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100698 select CPU_V7
Rob Herring90bc8ac2014-01-31 15:32:02 -0600699 select HAVE_SMP
Rob Herring387798b2012-09-06 13:41:12 -0500700
701config ARCH_MULTI_V6_V7
702 bool
Rob Herring9352b052014-01-31 15:36:10 -0600703 select MIGHT_HAVE_CACHE_L2X0
Rob Herring387798b2012-09-06 13:41:12 -0500704
705config ARCH_MULTI_CPU_AUTO
706 def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
707 select ARCH_MULTI_V5
708
709endmenu
710
Rob Herring05e2a3d2013-12-05 10:04:54 -0600711config ARCH_VIRT
Masahiro Yamadae3246542015-11-16 12:06:10 +0900712 bool "Dummy Virtual Machine"
713 depends on ARCH_MULTI_V7
Rob Herring4b8b5f22013-12-05 10:10:34 -0600714 select ARM_AMBA
Rob Herring05e2a3d2013-12-05 10:04:54 -0600715 select ARM_GIC
Pavel Fedin0e2f91e2015-11-27 12:56:26 +0100716 select ARM_GIC_V2M if PCI_MSI
Jean-Philippe Brucker0b28f1d2015-10-01 13:47:18 +0100717 select ARM_GIC_V3
Rob Herring05e2a3d2013-12-05 10:04:54 -0600718 select ARM_PSCI
Rob Herring4b8b5f22013-12-05 10:10:34 -0600719 select HAVE_ARM_ARCH_TIMER
Rob Herring05e2a3d2013-12-05 10:04:54 -0600720
Russell Kingccf50e22010-03-15 19:03:06 +0000721#
722# This is sorted alphabetically by mach-* pathname. However, plat-*
723# Kconfigs may be included either alphabetically (according to the
724# plat- suffix) or along side the corresponding mach-* source.
725#
Gregory CLEMENT3e93a222012-06-04 18:38:56 +0200726source "arch/arm/mach-mvebu/Kconfig"
727
Tsahee Zidenberg445d9b32015-03-12 13:53:00 +0200728source "arch/arm/mach-alpine/Kconfig"
729
Lars Persson590b4602016-02-11 17:06:19 +0100730source "arch/arm/mach-artpec/Kconfig"
731
Oleksij Rempeld9bfc862014-11-24 12:08:27 +0100732source "arch/arm/mach-asm9260/Kconfig"
733
Russell King95b8f202010-01-14 11:43:54 +0000734source "arch/arm/mach-at91/Kconfig"
735
Anders Berg1d22924e2014-05-23 11:08:35 +0200736source "arch/arm/mach-axxia/Kconfig"
737
Christian Daudt8ac49e02012-11-19 09:46:10 -0800738source "arch/arm/mach-bcm/Kconfig"
739
Sebastian Hesselbarth1c37fa12013-09-09 14:36:19 +0200740source "arch/arm/mach-berlin/Kconfig"
741
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742source "arch/arm/mach-clps711x/Kconfig"
743
Anton Vorontsovd94f9442010-03-25 17:12:41 +0300744source "arch/arm/mach-cns3xxx/Kconfig"
745
Russell King95b8f202010-01-14 11:43:54 +0000746source "arch/arm/mach-davinci/Kconfig"
747
Baruch Siachdf8d7422015-01-14 10:40:30 +0200748source "arch/arm/mach-digicolor/Kconfig"
749
Russell King95b8f202010-01-14 11:43:54 +0000750source "arch/arm/mach-dove/Kconfig"
751
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000752source "arch/arm/mach-ep93xx/Kconfig"
753
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754source "arch/arm/mach-footbridge/Kconfig"
755
Paulius Zaleckas59d3a192009-03-26 10:06:08 +0200756source "arch/arm/mach-gemini/Kconfig"
757
Rob Herring387798b2012-09-06 13:41:12 -0500758source "arch/arm/mach-highbank/Kconfig"
759
Haojian Zhuang389ee0c2013-12-20 10:52:56 +0800760source "arch/arm/mach-hisi/Kconfig"
761
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762source "arch/arm/mach-integrator/Kconfig"
763
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100764source "arch/arm/mach-iop32x/Kconfig"
765
766source "arch/arm/mach-iop33x/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767
Dan Williams285f5fa2006-12-07 02:59:39 +0100768source "arch/arm/mach-iop13xx/Kconfig"
769
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770source "arch/arm/mach-ixp4xx/Kconfig"
771
Santosh Shilimkar828989a2013-06-10 11:27:13 -0400772source "arch/arm/mach-keystone/Kconfig"
773
Russell King95b8f202010-01-14 11:43:54 +0000774source "arch/arm/mach-ks8695/Kconfig"
775
Carlo Caione3b8f5032014-09-10 22:16:59 +0200776source "arch/arm/mach-meson/Kconfig"
777
Jonas Jensen17723fd32013-12-18 13:58:45 +0100778source "arch/arm/mach-moxart/Kconfig"
779
Joel Stanley8c2ed9b2016-03-21 17:22:31 +1030780source "arch/arm/mach-aspeed/Kconfig"
781
Stanislav Samsonov794d15b2008-06-22 22:45:10 +0200782source "arch/arm/mach-mv78xx0/Kconfig"
783
Shawn Guo3995eb82012-09-13 19:48:07 +0800784source "arch/arm/mach-imx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785
Matthias Bruggerf682a212014-05-13 01:06:13 +0200786source "arch/arm/mach-mediatek/Kconfig"
787
Shawn Guo1d3f33d2010-12-13 20:55:03 +0800788source "arch/arm/mach-mxs/Kconfig"
789
Russell King95b8f202010-01-14 11:43:54 +0000790source "arch/arm/mach-netx/Kconfig"
Eric Miao49cbe782009-01-20 14:15:18 +0800791
Russell King95b8f202010-01-14 11:43:54 +0000792source "arch/arm/mach-nomadik/Kconfig"
Russell King95b8f202010-01-14 11:43:54 +0000793
Daniel Tang9851ca52013-06-11 18:40:17 +1000794source "arch/arm/mach-nspire/Kconfig"
795
Tony Lindgrend48af152005-07-10 19:58:17 +0100796source "arch/arm/plat-omap/Kconfig"
797
798source "arch/arm/mach-omap1/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799
Tony Lindgren1dbae812005-11-10 14:26:51 +0000800source "arch/arm/mach-omap2/Kconfig"
801
Lennert Buytenhek9dd0b192008-03-27 14:51:41 -0400802source "arch/arm/mach-orion5x/Kconfig"
Tzachi Perelstein585cf172007-10-23 15:14:41 -0400803
Rob Herring387798b2012-09-06 13:41:12 -0500804source "arch/arm/mach-picoxcell/Kconfig"
805
Russell King95b8f202010-01-14 11:43:54 +0000806source "arch/arm/mach-pxa/Kconfig"
807source "arch/arm/plat-pxa/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808
Russell King95b8f202010-01-14 11:43:54 +0000809source "arch/arm/mach-mmp/Kconfig"
810
Neil Armstrong8c9184b2016-03-03 10:42:15 +0100811source "arch/arm/mach-oxnas/Kconfig"
812
Kumar Gala8fc1b0f2014-01-21 17:14:10 -0600813source "arch/arm/mach-qcom/Kconfig"
814
Russell King95b8f202010-01-14 11:43:54 +0000815source "arch/arm/mach-realview/Kconfig"
816
Heiko Stuebnerd63dc052013-06-02 23:09:41 +0200817source "arch/arm/mach-rockchip/Kconfig"
818
Russell King95b8f202010-01-14 11:43:54 +0000819source "arch/arm/mach-sa1100/Kconfig"
Saeed Bisharaedabd382009-08-06 15:12:43 +0300820
Rob Herring387798b2012-09-06 13:41:12 -0500821source "arch/arm/mach-socfpga/Kconfig"
822
Arnd Bergmanna7ed0992012-12-02 15:12:47 +0100823source "arch/arm/mach-spear/Kconfig"
Ben Dooksa21765a2007-02-11 18:31:01 +0100824
Srinivas Kandagatla65ebcc12013-06-25 12:15:10 +0100825source "arch/arm/mach-sti/Kconfig"
826
Kukjin Kim85fd6d62012-02-06 09:38:19 +0900827source "arch/arm/mach-s3c24xx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828
Ben Dooks431107e2010-01-26 10:11:04 +0900829source "arch/arm/mach-s3c64xx/Kconfig"
Ben Dooksa08ab632008-10-21 14:06:39 +0100830
Kukjin Kim170f4e42010-02-24 16:40:44 +0900831source "arch/arm/mach-s5pv210/Kconfig"
832
Kukjin Kim83014572011-11-06 13:54:56 +0900833source "arch/arm/mach-exynos/Kconfig"
Rob Herringe509b282014-06-10 09:06:09 -0500834source "arch/arm/plat-samsung/Kconfig"
Changhwan Youncc0e72b2010-07-16 12:15:38 +0900835
Russell King882d01f2010-03-02 23:40:15 +0000836source "arch/arm/mach-shmobile/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837
Maxime Ripard3b526342012-11-08 12:40:16 +0100838source "arch/arm/mach-sunxi/Kconfig"
839
Barry Song156a0992012-08-23 13:41:58 +0800840source "arch/arm/mach-prima2/Kconfig"
841
Marc Gonzalezd6de5b02015-12-15 10:41:13 +0100842source "arch/arm/mach-tango/Kconfig"
843
Erik Gillingc5f80062010-01-21 16:53:02 -0800844source "arch/arm/mach-tegra/Kconfig"
845
Russell King95b8f202010-01-14 11:43:54 +0000846source "arch/arm/mach-u300/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847
Masahiro Yamadaba56a982015-05-08 13:07:11 +0900848source "arch/arm/mach-uniphier/Kconfig"
849
Russell King95b8f202010-01-14 11:43:54 +0000850source "arch/arm/mach-ux500/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851
852source "arch/arm/mach-versatile/Kconfig"
853
Russell Kingceade892010-02-11 21:44:53 +0000854source "arch/arm/mach-vexpress/Kconfig"
Russell King420c34e2011-01-18 20:08:06 +0000855source "arch/arm/plat-versatile/Kconfig"
Russell Kingceade892010-02-11 21:44:53 +0000856
Tony Prisk6f35f9a2012-10-11 20:13:09 +1300857source "arch/arm/mach-vt8500/Kconfig"
858
wanzongshun7ec80dd2008-12-03 03:55:38 +0100859source "arch/arm/mach-w90x900/Kconfig"
860
Jun Nieacede512015-04-28 17:18:05 +0800861source "arch/arm/mach-zx/Kconfig"
862
Josh Cartwright9a45eb62012-11-19 11:38:29 -0600863source "arch/arm/mach-zynq/Kconfig"
864
Stefan Agner499f1642015-05-21 00:35:44 +0200865# ARMv7-M architecture
866config ARCH_EFM32
867 bool "Energy Micro efm32"
868 depends on ARM_SINGLE_ARMV7M
869 select ARCH_REQUIRE_GPIOLIB
870 help
871 Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko
872 processors.
873
874config ARCH_LPC18XX
875 bool "NXP LPC18xx/LPC43xx"
876 depends on ARM_SINGLE_ARMV7M
877 select ARCH_HAS_RESET_CONTROLLER
878 select ARM_AMBA
879 select CLKSRC_LPC32XX
880 select PINCTRL
881 help
882 Support for NXP's LPC18xx Cortex-M3 and LPC43xx Cortex-M4
883 high performance microcontrollers.
884
885config ARCH_STM32
886 bool "STMicrolectronics STM32"
887 depends on ARM_SINGLE_ARMV7M
888 select ARCH_HAS_RESET_CONTROLLER
889 select ARMV7M_SYSTICK
Maxime Coquelin25263182015-05-22 23:50:52 +0200890 select CLKSRC_STM32
Maxime Coquelinf64e9802015-10-14 18:32:42 +0200891 select PINCTRL
Stefan Agner499f1642015-05-21 00:35:44 +0200892 select RESET_CONTROLLER
893 help
894 Support for STMicroelectronics STM32 processors.
895
Maxime Coquelinfa65fc62015-10-14 18:21:32 +0200896config MACH_STM32F429
897 bool "STMicrolectronics STM32F429"
898 depends on ARCH_STM32
899 default y
900
Vladimir Murzin18471192016-04-25 09:49:13 +0100901config ARCH_MPS2
902 bool "ARM MPS2 paltform"
903 depends on ARM_SINGLE_ARMV7M
904 select ARM_AMBA
905 select CLKSRC_MPS2
906 help
907 Support for Cortex-M Prototyping System (or V2M-MPS2) which comes
908 with a range of available cores like Cortex-M3/M4/M7.
909
910 Please, note that depends which Application Note is used memory map
911 for the platform may vary, so adjustment of RAM base might be needed.
912
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913# Definitions to make life easier
914config ARCH_ACORN
915 bool
916
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100917config PLAT_IOP
918 bool
Mikael Pettersson469d30442009-10-29 11:46:54 -0700919 select GENERIC_CLOCKEVENTS
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100920
Lennert Buytenhek69b02f62008-03-27 14:51:39 -0400921config PLAT_ORION
922 bool
Russell Kingbfe45e02011-05-08 15:33:30 +0100923 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100924 select COMMON_CLK
Russell Kingdc7ad3b2011-05-22 10:01:21 +0100925 select GENERIC_IRQ_CHIP
Andrew Lunn278b45b2012-06-27 13:40:04 +0200926 select IRQ_DOMAIN
Lennert Buytenhek69b02f62008-03-27 14:51:39 -0400927
Thomas Petazzoniabcda1d2012-09-11 14:27:27 +0200928config PLAT_ORION_LEGACY
929 bool
930 select PLAT_ORION
931
Eric Miaobd5ce432009-01-20 12:06:01 +0800932config PLAT_PXA
933 bool
934
Russell Kingf4b8b312010-01-14 12:48:06 +0000935config PLAT_VERSATILE
936 bool
937
Alexandre Courbotd9a1bea2013-11-24 15:30:46 +0900938source "arch/arm/firmware/Kconfig"
939
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940source arch/arm/mm/Kconfig
941
Lennert Buytenhekafe4b252006-12-03 18:51:14 +0100942config IWMMXT
Sebastian Hesselbarthd93003e2014-04-24 22:58:30 +0100943 bool "Enable iWMMXt support"
944 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B
945 default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B
Lennert Buytenhekafe4b252006-12-03 18:51:14 +0100946 help
947 Enable support for iWMMXt context switching at run time if
948 running on a CPU that supports it.
949
eric miao52108642010-12-13 09:42:34 +0100950config MULTI_IRQ_HANDLER
951 bool
952 help
953 Allow each machine to specify it's own IRQ handler at run time.
954
Hyok S. Choi3b93e7b2006-06-22 11:48:56 +0100955if !MMU
956source "arch/arm/Kconfig-nommu"
957endif
958
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100959config PJ4B_ERRATA_4742
960 bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
961 depends on CPU_PJ4B && MACH_ARMADA_370
962 default y
963 help
964 When coming out of either a Wait for Interrupt (WFI) or a Wait for
965 Event (WFE) IDLE states, a specific timing sensitivity exists between
966 the retiring WFI/WFE instructions and the newly issued subsequent
967 instructions. This sensitivity can result in a CPU hang scenario.
968 Workaround:
969 The software must insert either a Data Synchronization Barrier (DSB)
970 or Data Memory Barrier (DMB) command immediately after the WFI/WFE
971 instruction
972
Will Deaconf0c4b8d2012-04-20 17:20:08 +0100973config ARM_ERRATA_326103
974 bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
975 depends on CPU_V6
976 help
977 Executing a SWP instruction to read-only memory does not set bit 11
978 of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
979 treat the access as a read, preventing a COW from occurring and
980 causing the faulting task to livelock.
981
Catalin Marinas9cba3cc2009-04-30 17:06:03 +0100982config ARM_ERRATA_411920
983 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
Russell Kinge399b1a2011-01-17 15:08:32 +0000984 depends on CPU_V6 || CPU_V6K
Catalin Marinas9cba3cc2009-04-30 17:06:03 +0100985 help
986 Invalidation of the Instruction Cache operation can
987 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
988 It does not affect the MPCore. This option enables the ARM Ltd.
989 recommended workaround.
990
Catalin Marinas7ce236f2009-04-30 17:06:09 +0100991config ARM_ERRATA_430973
992 bool "ARM errata: Stale prediction on replaced interworking branch"
993 depends on CPU_V7
994 help
995 This option enables the workaround for the 430973 Cortex-A8
Russell King79403cd2015-04-13 16:14:37 +0100996 r1p* erratum. If a code sequence containing an ARM/Thumb
Catalin Marinas7ce236f2009-04-30 17:06:09 +0100997 interworking branch is replaced with another code sequence at the
998 same virtual address, whether due to self-modifying code or virtual
999 to physical address re-mapping, Cortex-A8 does not recover from the
1000 stale interworking branch prediction. This results in Cortex-A8
1001 executing the new code sequence in the incorrect ARM or Thumb state.
1002 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1003 and also flushes the branch target cache at every context switch.
1004 Note that setting specific bits in the ACTLR register may not be
1005 available in non-secure mode.
1006
Catalin Marinas855c5512009-04-30 17:06:15 +01001007config ARM_ERRATA_458693
1008 bool "ARM errata: Processor deadlock when a false hazard is created"
1009 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001010 depends on !ARCH_MULTIPLATFORM
Catalin Marinas855c5512009-04-30 17:06:15 +01001011 help
1012 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1013 erratum. For very specific sequences of memory operations, it is
1014 possible for a hazard condition intended for a cache line to instead
1015 be incorrectly associated with a different cache line. This false
1016 hazard might then cause a processor deadlock. The workaround enables
1017 the L1 caching of the NEON accesses and disables the PLD instruction
1018 in the ACTLR register. Note that setting specific bits in the ACTLR
1019 register may not be available in non-secure mode.
1020
Catalin Marinas0516e462009-04-30 17:06:20 +01001021config ARM_ERRATA_460075
1022 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1023 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001024 depends on !ARCH_MULTIPLATFORM
Catalin Marinas0516e462009-04-30 17:06:20 +01001025 help
1026 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1027 erratum. Any asynchronous access to the L2 cache may encounter a
1028 situation in which recent store transactions to the L2 cache are lost
1029 and overwritten with stale memory contents from external memory. The
1030 workaround disables the write-allocate mode for the L2 cache via the
1031 ACTLR register. Note that setting specific bits in the ACTLR register
1032 may not be available in non-secure mode.
1033
Will Deacon9f050272010-09-14 09:51:43 +01001034config ARM_ERRATA_742230
1035 bool "ARM errata: DMB operation may be faulty"
1036 depends on CPU_V7 && SMP
Rob Herring62e4d352012-12-21 22:42:40 +01001037 depends on !ARCH_MULTIPLATFORM
Will Deacon9f050272010-09-14 09:51:43 +01001038 help
1039 This option enables the workaround for the 742230 Cortex-A9
1040 (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1041 between two write operations may not ensure the correct visibility
1042 ordering of the two writes. This workaround sets a specific bit in
1043 the diagnostic register of the Cortex-A9 which causes the DMB
1044 instruction to behave as a DSB, ensuring the correct behaviour of
1045 the two writes.
1046
Will Deacona672e992010-09-14 09:53:02 +01001047config ARM_ERRATA_742231
1048 bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1049 depends on CPU_V7 && SMP
Rob Herring62e4d352012-12-21 22:42:40 +01001050 depends on !ARCH_MULTIPLATFORM
Will Deacona672e992010-09-14 09:53:02 +01001051 help
1052 This option enables the workaround for the 742231 Cortex-A9
1053 (r2p0..r2p2) erratum. Under certain conditions, specific to the
1054 Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1055 accessing some data located in the same cache line, may get corrupted
1056 data due to bad handling of the address hazard when the line gets
1057 replaced from one of the CPUs at the same time as another CPU is
1058 accessing it. This workaround sets specific bits in the diagnostic
1059 register of the Cortex-A9 which reduces the linefill issuing
1060 capabilities of the processor.
1061
Jon Medhurst69155792013-06-07 10:35:35 +01001062config ARM_ERRATA_643719
1063 bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
1064 depends on CPU_V7 && SMP
Russell Kinge5a5de42015-04-02 23:58:55 +01001065 default y
Jon Medhurst69155792013-06-07 10:35:35 +01001066 help
1067 This option enables the workaround for the 643719 Cortex-A9 (prior to
1068 r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
1069 register returns zero when it should return one. The workaround
1070 corrects this value, ensuring cache maintenance operations which use
1071 it behave as intended and avoiding data corruption.
1072
Will Deaconcdf357f2010-08-05 11:20:51 +01001073config ARM_ERRATA_720789
1074 bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
Dave Martine66dc742011-12-08 13:37:46 +01001075 depends on CPU_V7
Will Deaconcdf357f2010-08-05 11:20:51 +01001076 help
1077 This option enables the workaround for the 720789 Cortex-A9 (prior to
1078 r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1079 broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1080 As a consequence of this erratum, some TLB entries which should be
1081 invalidated are not, resulting in an incoherency in the system page
1082 tables. The workaround changes the TLB flushing routines to invalidate
1083 entries regardless of the ASID.
Will Deacon475d92f2010-09-28 14:02:02 +01001084
1085config ARM_ERRATA_743622
1086 bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1087 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001088 depends on !ARCH_MULTIPLATFORM
Will Deacon475d92f2010-09-28 14:02:02 +01001089 help
1090 This option enables the workaround for the 743622 Cortex-A9
Will Deaconefbc74a2012-02-24 12:12:38 +01001091 (r2p*) erratum. Under very rare conditions, a faulty
Will Deacon475d92f2010-09-28 14:02:02 +01001092 optimisation in the Cortex-A9 Store Buffer may lead to data
1093 corruption. This workaround sets a specific bit in the diagnostic
1094 register of the Cortex-A9 which disables the Store Buffer
1095 optimisation, preventing the defect from occurring. This has no
1096 visible impact on the overall performance or power consumption of the
1097 processor.
1098
Will Deacon9a27c272011-02-18 16:36:35 +01001099config ARM_ERRATA_751472
1100 bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
Dave Martinba90c512011-12-08 13:41:06 +01001101 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001102 depends on !ARCH_MULTIPLATFORM
Will Deacon9a27c272011-02-18 16:36:35 +01001103 help
1104 This option enables the workaround for the 751472 Cortex-A9 (prior
1105 to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1106 completion of a following broadcasted operation if the second
1107 operation is received by a CPU before the ICIALLUIS has completed,
1108 potentially leading to corrupted entries in the cache or TLB.
1109
Will Deaconfcbdc5fe2011-02-28 18:15:16 +01001110config ARM_ERRATA_754322
1111 bool "ARM errata: possible faulty MMU translations following an ASID switch"
1112 depends on CPU_V7
1113 help
1114 This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1115 r3p*) erratum. A speculative memory access may cause a page table walk
1116 which starts prior to an ASID switch but completes afterwards. This
1117 can populate the micro-TLB with a stale entry which may be hit with
1118 the new ASID. This workaround places two dsb instructions in the mm
1119 switching code so that no page table walks can cross the ASID switch.
1120
Will Deacon5dab26af2011-03-04 12:38:54 +01001121config ARM_ERRATA_754327
1122 bool "ARM errata: no automatic Store Buffer drain"
1123 depends on CPU_V7 && SMP
1124 help
1125 This option enables the workaround for the 754327 Cortex-A9 (prior to
1126 r2p0) erratum. The Store Buffer does not have any automatic draining
1127 mechanism and therefore a livelock may occur if an external agent
1128 continuously polls a memory location waiting to observe an update.
1129 This workaround defines cpu_relax() as smp_mb(), preventing correctly
1130 written polling loops from denying visibility of updates to memory.
1131
Catalin Marinas145e10e2011-08-15 11:04:41 +01001132config ARM_ERRATA_364296
1133 bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
Fabio Estevamfd832472013-07-09 18:34:01 +01001134 depends on CPU_V6
Catalin Marinas145e10e2011-08-15 11:04:41 +01001135 help
1136 This options enables the workaround for the 364296 ARM1136
1137 r0p2 erratum (possible cache data corruption with
1138 hit-under-miss enabled). It sets the undocumented bit 31 in
1139 the auxiliary control register and the FI bit in the control
1140 register, thus disabling hit-under-miss without putting the
1141 processor into full low interrupt latency mode. ARM11MPCore
1142 is not affected.
1143
Will Deaconf630c1b2011-09-15 11:45:15 +01001144config ARM_ERRATA_764369
1145 bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1146 depends on CPU_V7 && SMP
1147 help
1148 This option enables the workaround for erratum 764369
1149 affecting Cortex-A9 MPCore with two or more processors (all
1150 current revisions). Under certain timing circumstances, a data
1151 cache line maintenance operation by MVA targeting an Inner
1152 Shareable memory region may fail to proceed up to either the
1153 Point of Coherency or to the Point of Unification of the
1154 system. This workaround adds a DSB instruction before the
1155 relevant cache maintenance functions and sets a specific bit
1156 in the diagnostic control register of the SCU.
1157
Simon Horman7253b852012-09-28 02:12:45 +01001158config ARM_ERRATA_775420
1159 bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
1160 depends on CPU_V7
1161 help
1162 This option enables the workaround for the 775420 Cortex-A9 (r2p2,
1163 r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
1164 operation aborts with MMU exception, it might cause the processor
1165 to deadlock. This workaround puts DSB before executing ISB if
1166 an abort may occur on cache maintenance.
1167
Catalin Marinas93dc6882013-03-26 23:35:04 +01001168config ARM_ERRATA_798181
1169 bool "ARM errata: TLBI/DSB failure on Cortex-A15"
1170 depends on CPU_V7 && SMP
1171 help
1172 On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
1173 adequately shooting down all use of the old entries. This
1174 option enables the Linux kernel workaround for this erratum
1175 which sends an IPI to the CPUs that are running the same ASID
1176 as the one being invalidated.
1177
Will Deacon84b65042013-08-20 17:29:55 +01001178config ARM_ERRATA_773022
1179 bool "ARM errata: incorrect instructions may be executed from loop buffer"
1180 depends on CPU_V7
1181 help
1182 This option enables the workaround for the 773022 Cortex-A15
1183 (up to r0p4) erratum. In certain rare sequences of code, the
1184 loop buffer may deliver incorrect instructions. This
1185 workaround disables the loop buffer to avoid the erratum.
1186
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187endmenu
1188
1189source "arch/arm/common/Kconfig"
1190
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191menu "Bus support"
1192
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193config ISA
1194 bool
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195 help
1196 Find out whether you have ISA slots on your motherboard. ISA is the
1197 name of a bus system, i.e. the way the CPU talks to the other stuff
1198 inside your box. Other bus systems are PCI, EISA, MicroChannel
1199 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1200 newer boards don't support it. If you have ISA, say Y, otherwise N.
1201
Russell King065909b2006-01-04 15:44:16 +00001202# Select ISA DMA controller support
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203config ISA_DMA
1204 bool
Russell King065909b2006-01-04 15:44:16 +00001205 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206
Russell King065909b2006-01-04 15:44:16 +00001207# Select ISA DMA interface
Al Viro5cae8412005-05-04 05:39:22 +01001208config ISA_DMA_API
1209 bool
Al Viro5cae8412005-05-04 05:39:22 +01001210
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211config PCI
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +01001212 bool "PCI support" if MIGHT_HAVE_PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213 help
1214 Find out whether you have a PCI motherboard. PCI is the name of a
1215 bus system, i.e. the way the CPU talks to the other stuff inside
1216 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1217 VESA. If you have PCI, say Y, otherwise N.
1218
Anton Vorontsov52882172010-04-19 13:20:49 +01001219config PCI_DOMAINS
1220 bool
1221 depends on PCI
1222
Lorenzo Pieralisi8c7d14742014-11-21 11:29:26 +00001223config PCI_DOMAINS_GENERIC
1224 def_bool PCI_DOMAINS
1225
Marcelo Roberto Jimenezb080ac82010-12-16 21:34:51 +01001226config PCI_NANOENGINE
1227 bool "BSE nanoEngine PCI support"
1228 depends on SA1100_NANOENGINE
1229 help
1230 Enable PCI on the BSE nanoEngine board.
1231
Matthew Wilcox36e23592007-07-10 10:54:40 -06001232config PCI_SYSCALL
1233 def_bool PCI
1234
Mike Rapoporta0113a92007-11-25 08:55:34 +01001235config PCI_HOST_ITE8152
1236 bool
1237 depends on PCI && MACH_ARMCORE
1238 default y
1239 select DMABOUNCE
1240
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241source "drivers/pci/Kconfig"
1242
1243source "drivers/pcmcia/Kconfig"
1244
1245endmenu
1246
1247menu "Kernel Features"
1248
Dave Martin3b556582011-12-07 15:38:04 +00001249config HAVE_SMP
1250 bool
1251 help
1252 This option should be selected by machines which have an SMP-
1253 capable CPU.
1254
1255 The only effect of this option is to make the SMP-related
1256 options available to the user for configuration.
1257
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258config SMP
Russell Kingbb2d8132011-05-12 09:52:02 +01001259 bool "Symmetric Multi-Processing"
Russell Kingfbb4dda2011-01-17 18:01:58 +00001260 depends on CPU_V6K || CPU_V7
Russell Kingbc282482009-05-17 18:58:34 +01001261 depends on GENERIC_CLOCKEVENTS
Dave Martin3b556582011-12-07 15:38:04 +00001262 depends on HAVE_SMP
Jonathan Austin801bb212013-02-22 18:56:04 +00001263 depends on MMU || ARM_MPU
Arnd Bergmann03617482015-05-26 15:36:58 +01001264 select IRQ_WORK
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265 help
1266 This enables support for systems with more than one CPU. If you have
Robert Graffham4a474152014-01-23 15:55:29 -08001267 a system with only one CPU, say N. If you have a system with more
1268 than one CPU, say Y.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269
Robert Graffham4a474152014-01-23 15:55:29 -08001270 If you say N here, the kernel will run on uni- and multiprocessor
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 machines, but will use only one CPU of a multiprocessor machine. If
Robert Graffham4a474152014-01-23 15:55:29 -08001272 you say Y here, the kernel will run on many, but not all,
1273 uniprocessor machines. On a uniprocessor machine, the kernel
1274 will run faster if you say N here.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275
Paul Bolle395cf962011-08-15 02:02:26 +02001276 See also <file:Documentation/x86/i386/IO-APIC.txt>,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
Justin P. Mattock50a23e62010-10-16 10:36:23 -07001278 <http://tldp.org/HOWTO/SMP-HOWTO.html>.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279
1280 If you don't know what to do here, say N.
1281
Russell Kingf00ec482010-09-04 10:47:48 +01001282config SMP_ON_UP
Russell King5744ff42015-02-13 11:04:21 +00001283 bool "Allow booting SMP kernel on uniprocessor systems"
Jonathan Austin801bb212013-02-22 18:56:04 +00001284 depends on SMP && !XIP_KERNEL && MMU
Russell Kingf00ec482010-09-04 10:47:48 +01001285 default y
1286 help
1287 SMP kernels contain instructions which fail on non-SMP processors.
1288 Enabling this option allows the kernel to modify itself to make
1289 these instructions safe. Disabling it allows about 1K of space
1290 savings.
1291
1292 If you don't know what to do here, say Y.
1293
Vincent Guittotc9018aa2011-08-08 13:21:59 +01001294config ARM_CPU_TOPOLOGY
1295 bool "Support cpu topology definition"
1296 depends on SMP && CPU_V7
1297 default y
1298 help
1299 Support ARM cpu topology definition. The MPIDR register defines
1300 affinity between processors which is then used to describe the cpu
1301 topology of an ARM System.
1302
1303config SCHED_MC
1304 bool "Multi-core scheduler support"
1305 depends on ARM_CPU_TOPOLOGY
1306 help
1307 Multi-core scheduler support improves the CPU scheduler's decision
1308 making when dealing with multi-core CPU chips at a cost of slightly
1309 increased overhead in some places. If unsure say N here.
1310
1311config SCHED_SMT
1312 bool "SMT scheduler support"
1313 depends on ARM_CPU_TOPOLOGY
1314 help
1315 Improves the CPU scheduler's decision making when dealing with
1316 MultiThreading at a cost of slightly increased overhead in some
1317 places. If unsure say N here.
1318
Russell Kinga8cbcd92009-05-16 11:51:14 +01001319config HAVE_ARM_SCU
1320 bool
Russell Kinga8cbcd92009-05-16 11:51:14 +01001321 help
1322 This option enables support for the ARM system coherency unit
1323
Mark Rutland8a4da6e2012-11-12 14:33:44 +00001324config HAVE_ARM_ARCH_TIMER
Marc Zyngier022c03a2012-01-11 17:25:17 +00001325 bool "Architected timer support"
1326 depends on CPU_V7
Mark Rutland8a4da6e2012-11-12 14:33:44 +00001327 select ARM_ARCH_TIMER
Will Deacon0c4034622013-11-19 15:46:17 +01001328 select GENERIC_CLOCKEVENTS
Marc Zyngier022c03a2012-01-11 17:25:17 +00001329 help
1330 This option enables support for the ARM architected timer
1331
Russell Kingf32f4ce2009-05-16 12:14:21 +01001332config HAVE_ARM_TWD
1333 bool
Rob Herringda4a6862013-02-06 21:17:47 -06001334 select CLKSRC_OF if OF
Russell Kingf32f4ce2009-05-16 12:14:21 +01001335 help
1336 This options enables support for the ARM timer and watchdog unit
1337
Nicolas Pitree8db2882012-04-12 02:45:22 -04001338config MCPM
1339 bool "Multi-Cluster Power Management"
1340 depends on CPU_V7 && SMP
1341 help
1342 This option provides the common power management infrastructure
1343 for (multi-)cluster based systems, such as big.LITTLE based
1344 systems.
1345
Haojian Zhuangebf4a5c2014-04-15 14:52:00 +08001346config MCPM_QUAD_CLUSTER
1347 bool
1348 depends on MCPM
1349 help
1350 To avoid wasting resources unnecessarily, MCPM only supports up
1351 to 2 clusters by default.
1352 Platforms with 3 or 4 clusters that use MCPM must select this
1353 option to allow the additional clusters to be managed.
1354
Nicolas Pitre1c33be52012-04-12 02:56:10 -04001355config BIG_LITTLE
1356 bool "big.LITTLE support (Experimental)"
1357 depends on CPU_V7 && SMP
1358 select MCPM
1359 help
1360 This option enables support selections for the big.LITTLE
1361 system architecture.
1362
1363config BL_SWITCHER
1364 bool "big.LITTLE switcher support"
Arnd Bergmann6c044fe2015-11-19 15:49:23 +01001365 depends on BIG_LITTLE && MCPM && HOTPLUG_CPU && ARM_GIC
Russell King51aaf812014-04-22 22:26:27 +01001366 select CPU_PM
Nicolas Pitre1c33be52012-04-12 02:56:10 -04001367 help
1368 The big.LITTLE "switcher" provides the core functionality to
1369 transparently handle transition between a cluster of A15's
1370 and a cluster of A7's in a big.LITTLE system.
1371
Nicolas Pitreb22537c2012-04-12 03:04:28 -04001372config BL_SWITCHER_DUMMY_IF
1373 tristate "Simple big.LITTLE switcher user interface"
1374 depends on BL_SWITCHER && DEBUG_KERNEL
1375 help
1376 This is a simple and dummy char dev interface to control
1377 the big.LITTLE switcher core code. It is meant for
1378 debugging purposes only.
1379
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001380choice
1381 prompt "Memory split"
Russell King006fa252014-02-26 19:40:46 +00001382 depends on MMU
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001383 default VMSPLIT_3G
1384 help
1385 Select the desired split between kernel and user memory.
1386
1387 If you are not absolutely sure what you are doing, leave this
1388 option alone!
1389
1390 config VMSPLIT_3G
1391 bool "3G/1G user/kernel split"
Nicolas Pitre63ce4462015-09-13 03:30:11 +01001392 config VMSPLIT_3G_OPT
1393 bool "3G/1G user/kernel split (for full 1G low memory)"
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001394 config VMSPLIT_2G
1395 bool "2G/2G user/kernel split"
1396 config VMSPLIT_1G
1397 bool "1G/3G user/kernel split"
1398endchoice
1399
1400config PAGE_OFFSET
1401 hex
Russell King006fa252014-02-26 19:40:46 +00001402 default PHYS_OFFSET if !MMU
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001403 default 0x40000000 if VMSPLIT_1G
1404 default 0x80000000 if VMSPLIT_2G
Nicolas Pitre63ce4462015-09-13 03:30:11 +01001405 default 0xB0000000 if VMSPLIT_3G_OPT
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001406 default 0xC0000000
1407
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408config NR_CPUS
1409 int "Maximum number of CPUs (2-32)"
1410 range 2 32
1411 depends on SMP
1412 default "4"
1413
Russell Kinga054a812005-11-02 22:24:33 +00001414config HOTPLUG_CPU
Russell King00b7ded2012-10-22 22:54:30 +01001415 bool "Support for hot-pluggable CPUs"
Stephen Rothwell40b31362013-05-21 13:49:35 +10001416 depends on SMP
Russell Kinga054a812005-11-02 22:24:33 +00001417 help
1418 Say Y here to experiment with turning CPUs off and on. CPUs
1419 can be controlled through /sys/devices/system/cpu.
1420
Will Deacon2bdd4242012-12-12 19:20:52 +00001421config ARM_PSCI
1422 bool "Support for the ARM Power State Coordination Interface (PSCI)"
Jens Wiklandere6796602016-01-04 15:46:47 +01001423 depends on HAVE_ARM_SMCCC
Mark Rutlandbe120392015-07-31 15:46:19 +01001424 select ARM_PSCI_FW
Will Deacon2bdd4242012-12-12 19:20:52 +00001425 help
1426 Say Y here if you want Linux to communicate with system firmware
1427 implementing the PSCI specification for CPU-centric power
1428 management operations described in ARM document number ARM DEN
1429 0022A ("Power State Coordination Interface System Software on
1430 ARM processors").
1431
Maxime Ripard2a6ad872013-02-03 12:24:48 +01001432# The GPIO number here must be sorted by descending number. In case of
1433# a multiplatform kernel, we just want the highest value required by the
1434# selected platforms.
Peter De Schrijver (NVIDIA)44986ab2011-12-21 10:48:45 +01001435config ARCH_NR_GPIO
1436 int
Gregory Fongb35d2e52015-05-28 19:14:10 -07001437 default 1024 if ARCH_BRCMSTB || ARCH_SHMOBILE || ARCH_TEGRA || \
1438 ARCH_ZYNQ
Tomasz Figaaa425872014-07-03 13:17:12 +02001439 default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || \
1440 SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210
Boris BREZILLONeb171a92014-04-10 15:52:46 +02001441 default 416 if ARCH_SUNXI
Olof Johansson06b851e2013-04-02 18:33:58 -07001442 default 392 if ARCH_U8500
Tony Prisk01bb9142013-03-09 18:22:30 +13001443 default 352 if ARCH_VT8500
Heiko Stuebner7b5da4c2014-05-26 00:13:51 +02001444 default 288 if ARCH_ROCKCHIP
Maxime Ripard2a6ad872013-02-03 12:24:48 +01001445 default 264 if MACH_H4700
Peter De Schrijver (NVIDIA)44986ab2011-12-21 10:48:45 +01001446 default 0
1447 help
1448 Maximum number of GPIOs in the system.
1449
1450 If unsure, leave the default value.
1451
Uwe Kleine-Königd45a3982009-08-13 20:38:17 +02001452source kernel/Kconfig.preempt
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453
Russell Kingc9218b12013-04-27 23:31:10 +01001454config HZ_FIXED
Russell Kingf8065812006-03-02 22:41:59 +00001455 int
Kukjin Kim070b8b42014-07-02 07:50:15 +09001456 default 200 if ARCH_EBSA110 || ARCH_S3C24XX || \
Kukjin Kima73ddc62011-05-11 16:27:51 +09001457 ARCH_S5PV210 || ARCH_EXYNOS4
Alexandre Belloni1164f672015-03-13 22:57:24 +01001458 default 128 if SOC_AT91RM9200
Russell King47d84682013-09-10 23:47:55 +01001459 default 0
Russell Kingc9218b12013-04-27 23:31:10 +01001460
1461choice
Russell King47d84682013-09-10 23:47:55 +01001462 depends on HZ_FIXED = 0
Russell Kingc9218b12013-04-27 23:31:10 +01001463 prompt "Timer frequency"
1464
1465config HZ_100
1466 bool "100 Hz"
1467
1468config HZ_200
1469 bool "200 Hz"
1470
1471config HZ_250
1472 bool "250 Hz"
1473
1474config HZ_300
1475 bool "300 Hz"
1476
1477config HZ_500
1478 bool "500 Hz"
1479
1480config HZ_1000
1481 bool "1000 Hz"
1482
1483endchoice
1484
1485config HZ
1486 int
Russell King47d84682013-09-10 23:47:55 +01001487 default HZ_FIXED if HZ_FIXED != 0
Russell Kingc9218b12013-04-27 23:31:10 +01001488 default 100 if HZ_100
1489 default 200 if HZ_200
1490 default 250 if HZ_250
1491 default 300 if HZ_300
1492 default 500 if HZ_500
1493 default 1000
1494
1495config SCHED_HRTICK
1496 def_bool HIGH_RES_TIMERS
Russell Kingf8065812006-03-02 22:41:59 +00001497
Catalin Marinas16c79652009-07-24 12:33:02 +01001498config THUMB2_KERNEL
Uwe Kleine-Königbc7dea02011-12-09 20:52:10 +01001499 bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
Uwe Kleine-König4477ca42013-03-21 21:02:37 +01001500 depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
Uwe Kleine-Königbc7dea02011-12-09 20:52:10 +01001501 default y if CPU_THUMBONLY
Catalin Marinas16c79652009-07-24 12:33:02 +01001502 select AEABI
1503 select ARM_ASM_UNIFIED
Arnd Bergmann89bace62011-06-10 14:12:21 +00001504 select ARM_UNWIND
Catalin Marinas16c79652009-07-24 12:33:02 +01001505 help
1506 By enabling this option, the kernel will be compiled in
1507 Thumb-2 mode. A compiler/assembler that understand the unified
1508 ARM-Thumb syntax is needed.
1509
1510 If unsure, say N.
1511
Dave Martin6f685c52011-03-03 11:41:12 +01001512config THUMB2_AVOID_R_ARM_THM_JUMP11
1513 bool "Work around buggy Thumb-2 short branch relocations in gas"
1514 depends on THUMB2_KERNEL && MODULES
1515 default y
1516 help
1517 Various binutils versions can resolve Thumb-2 branches to
1518 locally-defined, preemptible global symbols as short-range "b.n"
1519 branch instructions.
1520
1521 This is a problem, because there's no guarantee the final
1522 destination of the symbol, or any candidate locations for a
1523 trampoline, are within range of the branch. For this reason, the
1524 kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1525 relocation in modules at all, and it makes little sense to add
1526 support.
1527
1528 The symptom is that the kernel fails with an "unsupported
1529 relocation" error when loading some modules.
1530
1531 Until fixed tools are available, passing
1532 -fno-optimize-sibling-calls to gcc should prevent gcc generating
1533 code which hits this problem, at the cost of a bit of extra runtime
1534 stack usage in some cases.
1535
1536 The problem is described in more detail at:
1537 https://bugs.launchpad.net/binutils-linaro/+bug/725126
1538
1539 Only Thumb-2 kernels are affected.
1540
1541 Unless you are sure your tools don't have this problem, say Y.
1542
Catalin Marinas0becb082009-07-24 12:32:53 +01001543config ARM_ASM_UNIFIED
1544 bool
1545
Nicolas Pitre42f25bd2015-12-12 02:49:21 +01001546config ARM_PATCH_IDIV
1547 bool "Runtime patch udiv/sdiv instructions into __aeabi_{u}idiv()"
1548 depends on CPU_32v7 && !XIP_KERNEL
1549 default y
1550 help
1551 The ARM compiler inserts calls to __aeabi_idiv() and
1552 __aeabi_uidiv() when it needs to perform division on signed
1553 and unsigned integers. Some v7 CPUs have support for the sdiv
1554 and udiv instructions that can be used to implement those
1555 functions.
1556
1557 Enabling this option allows the kernel to modify itself to
1558 replace the first two instructions of these library functions
1559 with the sdiv or udiv plus "bx lr" instructions when the CPU
1560 it is running on supports them. Typically this will be faster
1561 and less power intensive than running the original library
1562 code to do integer division.
1563
Nicolas Pitre704bdda02006-01-14 16:33:50 +00001564config AEABI
1565 bool "Use the ARM EABI to compile the kernel"
1566 help
1567 This option allows for the kernel to be compiled using the latest
1568 ARM ABI (aka EABI). This is only useful if you are using a user
1569 space environment that is also compiled with EABI.
1570
1571 Since there are major incompatibilities between the legacy ABI and
1572 EABI, especially with regard to structure member alignment, this
1573 option also changes the kernel syscall calling convention to
1574 disambiguate both ABIs and allow for backward compatibility support
1575 (selected with CONFIG_OABI_COMPAT).
1576
1577 To use this you need GCC version 4.0.0 or later.
1578
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001579config OABI_COMPAT
Russell Kinga73a3ff2006-02-08 21:09:55 +00001580 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
Kees Cookd6f94fa2013-01-16 18:53:14 -08001581 depends on AEABI && !THUMB2_KERNEL
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001582 help
1583 This option preserves the old syscall interface along with the
1584 new (ARM EABI) one. It also provides a compatibility layer to
1585 intercept syscalls that have structure arguments which layout
1586 in memory differs between the legacy ABI and the new ARM EABI
1587 (only for non "thumb" binaries). This option adds a tiny
1588 overhead to all syscalls and produces a slightly larger kernel.
Kees Cook91702172013-11-09 00:51:56 +01001589
1590 The seccomp filter system will not be available when this is
1591 selected, since there is no way yet to sensibly distinguish
1592 between calling conventions during filtering.
1593
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001594 If you know you'll be using only pure EABI user space then you
1595 can say N here. If this option is not selected and you attempt
1596 to execute a legacy ABI binary then the result will be
1597 UNPREDICTABLE (in fact it can be predicted that it won't work
Kees Cookb02f8462013-11-09 00:31:11 +01001598 at all). If in doubt say N.
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001599
Mel Gormaneb335752009-05-13 17:34:48 +01001600config ARCH_HAS_HOLES_MEMORYMODEL
Mel Gormane80d6a22008-08-14 11:10:14 +01001601 bool
Mel Gormane80d6a22008-08-14 11:10:14 +01001602
Russell King05944d72006-11-30 20:43:51 +00001603config ARCH_SPARSEMEM_ENABLE
1604 bool
1605
Russell King07a2f732008-10-01 21:39:58 +01001606config ARCH_SPARSEMEM_DEFAULT
1607 def_bool ARCH_SPARSEMEM_ENABLE
1608
Russell King05944d72006-11-30 20:43:51 +00001609config ARCH_SELECT_MEMORY_MODEL
Russell Kingbe370302010-05-07 17:40:33 +01001610 def_bool ARCH_SPARSEMEM_ENABLE
Yasunori Gotoc80d79d2006-04-10 22:53:53 -07001611
Will Deacon7b7bf492011-05-19 13:21:14 +01001612config HAVE_ARCH_PFN_VALID
1613 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1614
Steve Capperb8cd51a2014-10-09 15:29:20 -07001615config HAVE_GENERIC_RCU_GUP
1616 def_bool y
1617 depends on ARM_LPAE
1618
Nicolas Pitre053a96c2008-09-19 00:36:12 -04001619config HIGHMEM
Russell Kinge8db89a2011-05-12 09:53:05 +01001620 bool "High Memory Support"
1621 depends on MMU
Nicolas Pitre053a96c2008-09-19 00:36:12 -04001622 help
1623 The address space of ARM processors is only 4 Gigabytes large
1624 and it has to accommodate user address space, kernel address
1625 space as well as some memory mapped IO. That means that, if you
1626 have a large amount of physical memory and/or IO, not all of the
1627 memory can be "permanently mapped" by the kernel. The physical
1628 memory that is not permanently mapped is called "high memory".
1629
1630 Depending on the selected kernel/user memory split, minimum
1631 vmalloc space and actual amount of RAM, you may not need this
1632 option which should result in a slightly faster kernel.
1633
1634 If unsure, say n.
1635
Russell King65cec8e2009-08-17 20:02:06 +01001636config HIGHPTE
Russell King9a431bd2015-06-25 10:44:08 +01001637 bool "Allocate 2nd-level pagetables from highmem" if EXPERT
Russell King65cec8e2009-08-17 20:02:06 +01001638 depends on HIGHMEM
Russell King9a431bd2015-06-25 10:44:08 +01001639 default y
Russell Kingb4d103d2015-06-25 10:49:45 +01001640 help
1641 The VM uses one page of physical memory for each page table.
1642 For systems with a lot of processes, this can use a lot of
1643 precious low memory, eventually leading to low memory being
1644 consumed by page tables. Setting this option will allow
1645 user-space 2nd level page tables to reside in high memory.
Russell King65cec8e2009-08-17 20:02:06 +01001646
Russell Kinga5e090a2015-08-19 20:40:41 +01001647config CPU_SW_DOMAIN_PAN
1648 bool "Enable use of CPU domains to implement privileged no-access"
1649 depends on MMU && !ARM_LPAE
Jamie Iles1b8873a2010-02-02 20:25:44 +01001650 default y
1651 help
Russell Kinga5e090a2015-08-19 20:40:41 +01001652 Increase kernel security by ensuring that normal kernel accesses
1653 are unable to access userspace addresses. This can help prevent
1654 use-after-free bugs becoming an exploitable privilege escalation
1655 by ensuring that magic values (such as LIST_POISON) will always
1656 fault when dereferenced.
1657
1658 CPUs with low-vector mappings use a best-efforts implementation.
1659 Their lower 1MB needs to remain accessible for the vectors, but
1660 the remainder of userspace will become appropriately inaccessible.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001661
1662config HW_PERF_EVENTS
Mark Rutlandfa8ad782015-07-06 12:23:53 +01001663 def_bool y
1664 depends on ARM_PMU
Jamie Iles1b8873a2010-02-02 20:25:44 +01001665
Catalin Marinas1355e2a2012-07-25 14:32:38 +01001666config SYS_SUPPORTS_HUGETLBFS
1667 def_bool y
1668 depends on ARM_LPAE
1669
Catalin Marinas8d962502012-07-25 14:39:26 +01001670config HAVE_ARCH_TRANSPARENT_HUGEPAGE
1671 def_bool y
1672 depends on ARM_LPAE
1673
Steven Capper4bfab202013-07-26 14:58:22 +01001674config ARCH_WANT_GENERAL_HUGETLB
1675 def_bool y
1676
Ard Biesheuvel7d485f62014-11-24 16:54:35 +01001677config ARM_MODULE_PLTS
1678 bool "Use PLTs to allow module memory to spill over into vmalloc area"
1679 depends on MODULES
1680 help
1681 Allocate PLTs when loading modules so that jumps and calls whose
1682 targets are too far away for their relative offsets to be encoded
1683 in the instructions themselves can be bounced via veneers in the
1684 module's PLT. This allows modules to be allocated in the generic
1685 vmalloc area after the dedicated module memory area has been
1686 exhausted. The modules will use slightly more memory, but after
1687 rounding up to page size, the actual memory footprint is usually
1688 the same.
1689
1690 Say y if you are getting out of memory errors while loading modules
1691
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692source "mm/Kconfig"
1693
Magnus Dammc1b2d972010-07-05 10:00:11 +01001694config FORCE_MAX_ZONEORDER
Ulrich Hecht36d6c922015-08-14 15:51:06 +02001695 int "Maximum zone order"
Yegor Yefremov898f08e2012-10-08 14:37:53 -07001696 default "12" if SOC_AM33XX
Uwe Kleine-König6d85e2b2011-11-17 14:36:23 +01001697 default "9" if SA1111 || ARCH_EFM32
Magnus Dammc1b2d972010-07-05 10:00:11 +01001698 default "11"
1699 help
1700 The kernel memory allocator divides physically contiguous memory
1701 blocks into "zones", where each zone is a power of two number of
1702 pages. This option selects the largest power of two that the kernel
1703 keeps in the memory allocator. If you need to allocate very large
1704 blocks of physically contiguous memory, then you may need to
1705 increase this value.
1706
1707 This config option is actually maximum order plus one. For example,
1708 a value of 11 means that the largest free memory block is 2^10 pages.
1709
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710config ALIGNMENT_TRAP
1711 bool
Hyok S. Choif12d0d72006-09-26 17:36:37 +09001712 depends on CPU_CP15_MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713 default y if !ARCH_EBSA110
Russell Kinge119bff2010-01-10 17:23:29 +00001714 select HAVE_PROC_CPU if PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 help
Matt LaPlante84eb8d02006-10-03 22:53:09 +02001716 ARM processors cannot fetch/store information which is not
Linus Torvalds1da177e2005-04-16 15:20:36 -07001717 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1718 address divisible by 4. On 32-bit ARM processors, these non-aligned
1719 fetch/store instructions will be emulated in software if you say
1720 here, which has a severe performance impact. This is necessary for
1721 correct operation of some network protocols. With an IP-only
1722 configuration it is safe to say N, otherwise say Y.
1723
Lennert Buytenhek39ec58f2009-03-09 14:30:09 -04001724config UACCESS_WITH_MEMCPY
Linus Walleij38ef2ad2012-09-10 16:36:37 +01001725 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
1726 depends on MMU
Lennert Buytenhek39ec58f2009-03-09 14:30:09 -04001727 default y if CPU_FEROCEON
1728 help
1729 Implement faster copy_to_user and clear_user methods for CPU
1730 cores where a 8-word STM instruction give significantly higher
1731 memory write throughput than a sequence of individual 32bit stores.
1732
1733 A possible side effect is a slight increase in scheduling latency
1734 between threads sharing the same address space if they invoke
1735 such copy operations with large buffers.
1736
1737 However, if the CPU data cache is using a write-allocate mode,
1738 this option is unlikely to provide any performance gain.
1739
Nicolas Pitre70c70d92010-08-26 15:08:35 -07001740config SECCOMP
1741 bool
1742 prompt "Enable seccomp to safely compute untrusted bytecode"
1743 ---help---
1744 This kernel feature is useful for number crunching applications
1745 that may need to compute untrusted bytecode during their
1746 execution. By using pipes or other transports made available to
1747 the process as file descriptors supporting the read/write
1748 syscalls, it's possible to isolate those applications in
1749 their own address space using seccomp. Once seccomp is
1750 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1751 and the task is only allowed to execute a few safe syscalls
1752 defined by each seccomp mode.
1753
Stefano Stabellini06e62952013-10-15 15:47:14 +00001754config SWIOTLB
1755 def_bool y
1756
1757config IOMMU_HELPER
1758 def_bool SWIOTLB
1759
Stefano Stabellini02c24332015-11-23 10:32:57 +00001760config PARAVIRT
1761 bool "Enable paravirtualization code"
1762 help
1763 This changes the kernel so it can modify itself when it is run
1764 under a hypervisor, potentially improving performance significantly
1765 over full virtualization.
1766
1767config PARAVIRT_TIME_ACCOUNTING
1768 bool "Paravirtual steal time accounting"
1769 select PARAVIRT
1770 default n
1771 help
1772 Select this option to enable fine granularity task steal time
1773 accounting. Time spent executing other tasks in parallel with
1774 the current vCPU is discounted from the vCPU power. To account for
1775 that, there can be a small performance impact.
1776
1777 If in doubt, say N here.
1778
Stefano Stabellinieff8d642012-09-17 14:58:17 +00001779config XEN_DOM0
1780 def_bool y
1781 depends on XEN
1782
1783config XEN
Julien Grallc2ba1f72014-09-17 14:07:06 -07001784 bool "Xen guest support on ARM"
Ian Campbell85323a92013-03-07 07:17:25 +00001785 depends on ARM && AEABI && OF
Arnd Bergmannf880b672012-10-09 10:33:52 +00001786 depends on CPU_V7 && !CPU_V6
Ian Campbell85323a92013-03-07 07:17:25 +00001787 depends on !GENERIC_ATOMIC64
Uwe Kleine-König7693dec2014-03-03 09:25:52 -05001788 depends on MMU
Russell King51aaf812014-04-22 22:26:27 +01001789 select ARCH_DMA_ADDR_T_64BIT
Stefano Stabellini17b7ab82013-04-24 18:47:18 +00001790 select ARM_PSCI
Stefano Stabellini83862cc2013-10-10 13:40:44 +00001791 select SWIOTLB_XEN
Stefano Stabellini02c24332015-11-23 10:32:57 +00001792 select PARAVIRT
Stefano Stabellinieff8d642012-09-17 14:58:17 +00001793 help
1794 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
1795
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796endmenu
1797
1798menu "Boot options"
1799
Grant Likely9eb8f672011-04-28 14:27:20 -06001800config USE_OF
1801 bool "Flattened Device Tree support"
Russell Kingb1b3f492012-10-06 17:12:25 +01001802 select IRQ_DOMAIN
Grant Likely9eb8f672011-04-28 14:27:20 -06001803 select OF
Grant Likely9eb8f672011-04-28 14:27:20 -06001804 help
1805 Include support for flattened device tree machine descriptions.
1806
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01001807config ATAGS
1808 bool "Support for the traditional ATAGS boot data passing" if USE_OF
1809 default y
1810 help
1811 This is the traditional way of passing data to the kernel at boot
1812 time. If you are solely relying on the flattened device tree (or
1813 the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
1814 to remove ATAGS support from your kernel binary. If unsure,
1815 leave this to y.
1816
1817config DEPRECATED_PARAM_STRUCT
1818 bool "Provide old way to pass kernel parameters"
1819 depends on ATAGS
1820 help
1821 This was deprecated in 2001 and announced to live on for 5 years.
1822 Some old boot loaders still use this way.
1823
Linus Torvalds1da177e2005-04-16 15:20:36 -07001824# Compressed boot loader in ROM. Yes, we really want to ask about
1825# TEXT and BSS so we preserve their values in the config files.
1826config ZBOOT_ROM_TEXT
1827 hex "Compressed ROM boot loader base address"
1828 default "0"
1829 help
1830 The physical address at which the ROM-able zImage is to be
1831 placed in the target. Platforms which normally make use of
1832 ROM-able zImage formats normally set this to a suitable
1833 value in their defconfig file.
1834
1835 If ZBOOT_ROM is not enabled, this has no effect.
1836
1837config ZBOOT_ROM_BSS
1838 hex "Compressed ROM boot loader BSS address"
1839 default "0"
1840 help
Dan Fandrichf8c440b2006-09-20 23:28:51 +01001841 The base address of an area of read/write memory in the target
1842 for the ROM-able zImage which must be available while the
1843 decompressor is running. It must be large enough to hold the
1844 entire decompressed kernel plus an additional 128 KiB.
1845 Platforms which normally make use of ROM-able zImage formats
1846 normally set this to a suitable value in their defconfig file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847
1848 If ZBOOT_ROM is not enabled, this has no effect.
1849
1850config ZBOOT_ROM
1851 bool "Compressed boot loader in ROM/flash"
1852 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
Russell King10968132014-01-01 11:59:44 +00001853 depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854 help
1855 Say Y here if you intend to execute your compressed kernel image
1856 (zImage) directly from ROM or flash. If unsure, say N.
1857
John Bonesioe2a6a3a2011-05-27 18:45:50 -04001858config ARM_APPENDED_DTB
1859 bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
Russell King10968132014-01-01 11:59:44 +00001860 depends on OF
John Bonesioe2a6a3a2011-05-27 18:45:50 -04001861 help
1862 With this option, the boot code will look for a device tree binary
1863 (DTB) appended to zImage
1864 (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1865
1866 This is meant as a backward compatibility convenience for those
1867 systems with a bootloader that can't be upgraded to accommodate
1868 the documented boot protocol using a device tree.
1869
1870 Beware that there is very little in terms of protection against
1871 this option being confused by leftover garbage in memory that might
1872 look like a DTB header after a reboot if no actual DTB is appended
1873 to zImage. Do not leave this option active in a production kernel
1874 if you don't intend to always append a DTB. Proper passing of the
1875 location into r2 of a bootloader provided DTB is always preferable
1876 to this option.
1877
Nicolas Pitreb90b9a32011-09-13 22:37:07 -04001878config ARM_ATAG_DTB_COMPAT
1879 bool "Supplement the appended DTB with traditional ATAG information"
1880 depends on ARM_APPENDED_DTB
1881 help
1882 Some old bootloaders can't be updated to a DTB capable one, yet
1883 they provide ATAGs with memory configuration, the ramdisk address,
1884 the kernel cmdline string, etc. Such information is dynamically
1885 provided by the bootloader and can't always be stored in a static
1886 DTB. To allow a device tree enabled kernel to be used with such
1887 bootloaders, this option allows zImage to extract the information
1888 from the ATAG list and store it at run time into the appended DTB.
1889
Genoud Richardd0f34a112012-06-26 16:37:59 +01001890choice
1891 prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
1892 default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1893
1894config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1895 bool "Use bootloader kernel arguments if available"
1896 help
1897 Uses the command-line options passed by the boot loader instead of
1898 the device tree bootargs property. If the boot loader doesn't provide
1899 any, the device tree bootargs property will be used.
1900
1901config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
1902 bool "Extend with bootloader kernel arguments"
1903 help
1904 The command-line arguments provided by the boot loader will be
1905 appended to the the device tree bootargs property.
1906
1907endchoice
1908
Linus Torvalds1da177e2005-04-16 15:20:36 -07001909config CMDLINE
1910 string "Default kernel command string"
1911 default ""
1912 help
1913 On some architectures (EBSA110 and CATS), there is currently no way
1914 for the boot loader to pass arguments to the kernel. For these
1915 architectures, you should supply some command-line options at build
1916 time by entering them here. As a minimum, you should specify the
1917 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1918
Victor Boivie4394c122011-05-04 17:07:55 +01001919choice
1920 prompt "Kernel command line type" if CMDLINE != ""
1921 default CMDLINE_FROM_BOOTLOADER
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01001922 depends on ATAGS
Victor Boivie4394c122011-05-04 17:07:55 +01001923
1924config CMDLINE_FROM_BOOTLOADER
1925 bool "Use bootloader kernel arguments if available"
1926 help
1927 Uses the command-line options passed by the boot loader. If
1928 the boot loader doesn't provide any, the default kernel command
1929 string provided in CMDLINE will be used.
1930
1931config CMDLINE_EXTEND
1932 bool "Extend bootloader kernel arguments"
1933 help
1934 The command-line arguments provided by the boot loader will be
1935 appended to the default kernel command string.
1936
Alexander Holler92d20402010-02-16 19:04:53 +01001937config CMDLINE_FORCE
1938 bool "Always use the default kernel command string"
Alexander Holler92d20402010-02-16 19:04:53 +01001939 help
1940 Always use the default kernel command string, even if the boot
1941 loader passes other arguments to the kernel.
1942 This is useful if you cannot or don't want to change the
1943 command-line options your boot loader passes to the kernel.
Victor Boivie4394c122011-05-04 17:07:55 +01001944endchoice
Alexander Holler92d20402010-02-16 19:04:53 +01001945
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946config XIP_KERNEL
1947 bool "Kernel Execute-In-Place from ROM"
Russell King10968132014-01-01 11:59:44 +00001948 depends on !ARM_LPAE && !ARCH_MULTIPLATFORM
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949 help
1950 Execute-In-Place allows the kernel to run from non-volatile storage
1951 directly addressable by the CPU, such as NOR flash. This saves RAM
1952 space since the text section of the kernel is not loaded from flash
1953 to RAM. Read-write sections, such as the data section and stack,
1954 are still copied to RAM. The XIP kernel is not compressed since
1955 it has to run directly from flash, so it will take more space to
1956 store it. The flash address used to link the kernel object files,
1957 and for storing it, is configuration dependent. Therefore, if you
1958 say Y here, you must know the proper physical address where to
1959 store the kernel image depending on your own flash memory usage.
1960
1961 Also note that the make target becomes "make xipImage" rather than
1962 "make zImage" or "make Image". The final kernel binary to put in
1963 ROM memory will be arch/arm/boot/xipImage.
1964
1965 If unsure, say N.
1966
1967config XIP_PHYS_ADDR
1968 hex "XIP Kernel Physical Location"
1969 depends on XIP_KERNEL
1970 default "0x00080000"
1971 help
1972 This is the physical address in your flash memory the kernel will
1973 be linked for and stored to. This address is dependent on your
1974 own flash usage.
1975
Richard Purdiec587e4a2007-02-06 21:29:00 +01001976config KEXEC
1977 bool "Kexec system call (EXPERIMENTAL)"
Stephen Warren19ab4282013-06-14 16:14:14 +01001978 depends on (!SMP || PM_SLEEP_SMP)
Arnd Bergmanncb1293e2015-05-26 15:40:44 +01001979 depends on !CPU_V7M
Dave Young2965faa2015-09-09 15:38:55 -07001980 select KEXEC_CORE
Richard Purdiec587e4a2007-02-06 21:29:00 +01001981 help
1982 kexec is a system call that implements the ability to shutdown your
1983 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante01dd2fb2007-10-20 01:34:40 +02001984 but it is independent of the system firmware. And like a reboot
Richard Purdiec587e4a2007-02-06 21:29:00 +01001985 you can start any kernel with it, not just Linux.
1986
1987 It is an ongoing process to be certain the hardware in a machine
1988 is properly shutdown, so do not be surprised if this code does not
Geert Uytterhoevenbf220692013-08-20 21:38:03 +02001989 initially work for you.
Richard Purdiec587e4a2007-02-06 21:29:00 +01001990
Richard Purdie4cd9d6f2008-01-02 00:56:46 +01001991config ATAGS_PROC
1992 bool "Export atags in procfs"
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01001993 depends on ATAGS && KEXEC
Uli Luckasb98d7292008-02-22 16:45:18 +01001994 default y
Richard Purdie4cd9d6f2008-01-02 00:56:46 +01001995 help
1996 Should the atags used to boot the kernel be exported in an "atags"
1997 file in procfs. Useful with kexec.
1998
Mika Westerbergcb5d39b2010-11-18 19:14:52 +01001999config CRASH_DUMP
2000 bool "Build kdump crash kernel (EXPERIMENTAL)"
Mika Westerbergcb5d39b2010-11-18 19:14:52 +01002001 help
2002 Generate crash dump after being started by kexec. This should
2003 be normally only set in special crash dump kernels which are
2004 loaded in the main kernel with kexec-tools into a specially
2005 reserved region and then later executed after a crash by
2006 kdump/kexec. The crash dump kernel must be compiled to a
2007 memory address not used by the main kernel
2008
2009 For more details see Documentation/kdump/kdump.txt
2010
Eric Miaoe69edc792010-07-05 15:56:50 +02002011config AUTO_ZRELADDR
2012 bool "Auto calculation of the decompressed kernel image address"
Eric Miaoe69edc792010-07-05 15:56:50 +02002013 help
2014 ZRELADDR is the physical address where the decompressed kernel
2015 image will be placed. If AUTO_ZRELADDR is selected, the address
2016 will be determined at run-time by masking the current IP with
2017 0xf8000000. This assumes the zImage being placed in the first 128MB
2018 from start of memory.
2019
Roy Franz81a0bc32015-09-23 20:17:54 -07002020config EFI_STUB
2021 bool
2022
2023config EFI
2024 bool "UEFI runtime support"
2025 depends on OF && !CPU_BIG_ENDIAN && MMU && AUTO_ZRELADDR && !XIP_KERNEL
2026 select UCS2_STRING
2027 select EFI_PARAMS_FROM_FDT
2028 select EFI_STUB
2029 select EFI_ARMSTUB
2030 select EFI_RUNTIME_WRAPPERS
2031 ---help---
2032 This option provides support for runtime services provided
2033 by UEFI firmware (such as non-volatile variables, realtime
2034 clock, and platform reset). A UEFI stub is also provided to
2035 allow the kernel to be booted as an EFI application. This
2036 is only useful for kernels that may run on systems that have
2037 UEFI firmware.
2038
Linus Torvalds1da177e2005-04-16 15:20:36 -07002039endmenu
2040
Russell Kingac9d7ef2008-08-18 17:26:00 +01002041menu "CPU Power Management"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002042
Linus Torvalds1da177e2005-04-16 15:20:36 -07002043source "drivers/cpufreq/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002044
Russell Kingac9d7ef2008-08-18 17:26:00 +01002045source "drivers/cpuidle/Kconfig"
2046
2047endmenu
2048
Linus Torvalds1da177e2005-04-16 15:20:36 -07002049menu "Floating point emulation"
2050
2051comment "At least one emulation must be selected"
2052
2053config FPE_NWFPE
2054 bool "NWFPE math emulation"
Dave Martin593c2522010-12-13 21:56:03 +01002055 depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056 ---help---
2057 Say Y to include the NWFPE floating point emulator in the kernel.
2058 This is necessary to run most binaries. Linux does not currently
2059 support floating point hardware so you need to say Y here even if
2060 your machine has an FPA or floating point co-processor podule.
2061
2062 You may say N here if you are going to load the Acorn FPEmulator
2063 early in the bootup.
2064
2065config FPE_NWFPE_XP
2066 bool "Support extended precision"
Lennert Buytenhekbedf1422005-11-07 21:12:08 +00002067 depends on FPE_NWFPE
Linus Torvalds1da177e2005-04-16 15:20:36 -07002068 help
2069 Say Y to include 80-bit support in the kernel floating-point
2070 emulator. Otherwise, only 32 and 64-bit support is compiled in.
2071 Note that gcc does not generate 80-bit operations by default,
2072 so in most cases this option only enlarges the size of the
2073 floating point emulator without any good reason.
2074
2075 You almost surely want to say N here.
2076
2077config FPE_FASTFPE
2078 bool "FastFPE math emulation (EXPERIMENTAL)"
Kees Cookd6f94fa2013-01-16 18:53:14 -08002079 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
Linus Torvalds1da177e2005-04-16 15:20:36 -07002080 ---help---
2081 Say Y here to include the FAST floating point emulator in the kernel.
2082 This is an experimental much faster emulator which now also has full
2083 precision for the mantissa. It does not support any exceptions.
2084 It is very simple, and approximately 3-6 times faster than NWFPE.
2085
2086 It should be sufficient for most programs. It may be not suitable
2087 for scientific calculations, but you have to check this for yourself.
2088 If you do not feel you need a faster FP emulation you should better
2089 choose NWFPE.
2090
2091config VFP
2092 bool "VFP-format floating point maths"
Russell Kinge399b1a2011-01-17 15:08:32 +00002093 depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
Linus Torvalds1da177e2005-04-16 15:20:36 -07002094 help
2095 Say Y to include VFP support code in the kernel. This is needed
2096 if your hardware includes a VFP unit.
2097
2098 Please see <file:Documentation/arm/VFP/release-notes.txt> for
2099 release notes and additional status information.
2100
2101 Say N if your target does not have VFP hardware.
2102
Catalin Marinas25ebee02007-09-25 15:22:24 +01002103config VFPv3
2104 bool
2105 depends on VFP
2106 default y if CPU_V7
2107
Catalin Marinasb5872db2008-01-10 19:16:17 +01002108config NEON
2109 bool "Advanced SIMD (NEON) Extension support"
2110 depends on VFPv3 && CPU_V7
2111 help
2112 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2113 Extension.
2114
Ard Biesheuvel73c132c2013-05-16 11:41:48 +02002115config KERNEL_MODE_NEON
2116 bool "Support for NEON in kernel mode"
Russell Kingc4a30c32013-09-22 11:08:50 +01002117 depends on NEON && AEABI
Ard Biesheuvel73c132c2013-05-16 11:41:48 +02002118 help
2119 Say Y to include support for NEON in kernel mode.
2120
Linus Torvalds1da177e2005-04-16 15:20:36 -07002121endmenu
2122
2123menu "Userspace binary formats"
2124
2125source "fs/Kconfig.binfmt"
2126
Linus Torvalds1da177e2005-04-16 15:20:36 -07002127endmenu
2128
2129menu "Power management options"
2130
Russell Kingeceab4a2005-11-15 11:31:41 +00002131source "kernel/power/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002132
Johannes Bergf4cb5702007-12-08 02:14:00 +01002133config ARCH_SUSPEND_POSSIBLE
Ezequiel Garcia19a05192013-08-16 10:28:24 +01002134 depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
Uwe Kleine-Königf0d75152012-02-01 10:00:00 +01002135 CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
Johannes Bergf4cb5702007-12-08 02:14:00 +01002136 def_bool y
2137
Arnd Bergmann15e0d9e2011-10-01 21:09:39 +02002138config ARM_CPU_SUSPEND
Lorenzo Pieralisi8b6f2492016-02-01 18:01:30 +01002139 def_bool PM_SLEEP || BL_SWITCHER || ARM_PSCI_FW
Lorenzo Pieralisi1b9bdf52016-02-01 18:01:29 +01002140 depends on ARCH_SUSPEND_POSSIBLE
Arnd Bergmann15e0d9e2011-10-01 21:09:39 +02002141
Sebastian Capella603fb422014-03-25 01:20:29 +01002142config ARCH_HIBERNATION_POSSIBLE
2143 bool
2144 depends on MMU
2145 default y if ARCH_SUSPEND_POSSIBLE
2146
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147endmenu
2148
Sam Ravnborgd5950b42005-07-11 21:03:49 -07002149source "net/Kconfig"
2150
Uwe Kleine-Königac251502009-08-13 21:09:21 +02002151source "drivers/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002152
Kumar Gala916f7432015-02-26 15:49:09 -06002153source "drivers/firmware/Kconfig"
2154
Linus Torvalds1da177e2005-04-16 15:20:36 -07002155source "fs/Kconfig"
2156
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157source "arch/arm/Kconfig.debug"
2158
2159source "security/Kconfig"
2160
2161source "crypto/Kconfig"
Ard Biesheuvel652ccae2015-03-10 09:47:44 +01002162if CRYPTO
2163source "arch/arm/crypto/Kconfig"
2164endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002165
2166source "lib/Kconfig"
Christoffer Dall749cf76c2013-01-20 18:28:06 -05002167
2168source "arch/arm/kvm/Kconfig"