blob: 90542db1220dbcff5bc7f0d27ce233389a6d780d [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001config ARM
2 bool
3 default y
Catalin Marinas74634492012-07-30 14:41:09 -07004 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
Dan Williams21266be2015-11-19 18:19:29 -08005 select ARCH_HAS_DEVMEM_IS_ALLOWED
Kees Cook2b68f6c2015-04-14 15:48:00 -07006 select ARCH_HAS_ELF_RANDOMIZE
Mark Rutland3d067702012-10-30 12:13:42 +00007 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
Russell King171b3f02013-09-12 21:24:42 +01008 select ARCH_HAVE_CUSTOM_GPIO_H
Riku Voipio957e3fa2014-12-12 16:57:44 -08009 select ARCH_HAS_GCOV_PROFILE_ALL
Mark Salterd7018842013-10-07 22:07:58 -040010 select ARCH_MIGHT_HAVE_PC_PARPORT
Peter Zijlstra4badad32014-06-06 19:53:16 +020011 select ARCH_SUPPORTS_ATOMIC_RMW
Kim Phillips017f1612013-11-06 05:15:24 +010012 select ARCH_USE_BUILTIN_BSWAP
Will Deacon0cbad9c2013-10-09 17:19:22 +010013 select ARCH_USE_CMPXCHG_LOCKREF
Russell Kingb1b3f492012-10-06 17:12:25 +010014 select ARCH_WANT_IPC_PARSE_VERSION
Stephen Boydee951c62012-10-29 19:19:34 +010015 select BUILDTIME_EXTABLE_SORT if MMU
Russell King171b3f02013-09-12 21:24:42 +010016 select CLONE_BACKWARDS
Russell Kingb1b3f492012-10-06 17:12:25 +010017 select CPU_PM if (SUSPEND || CPU_IDLE)
Will Deacondce5c9e2013-12-17 19:50:16 +010018 select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS
Borislav Petkovb01aec92015-05-21 19:59:31 +020019 select EDAC_SUPPORT
20 select EDAC_ATOMIC_SCRUB
Laura Abbott36d0fd22014-10-09 15:26:42 -070021 select GENERIC_ALLOCATOR
Uwe Kleine-König4477ca42013-03-21 21:02:37 +010022 select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
Russell Kingb1b3f492012-10-06 17:12:25 +010023 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
Ard Biesheuvel29373672015-09-01 08:59:28 +020024 select GENERIC_EARLY_IOREMAP
Russell King171b3f02013-09-12 21:24:42 +010025 select GENERIC_IDLE_POLL_SETUP
Russell Kingb1b3f492012-10-06 17:12:25 +010026 select GENERIC_IRQ_PROBE
27 select GENERIC_IRQ_SHOW
Geert Uytterhoeven7c070052015-04-01 13:37:11 +010028 select GENERIC_IRQ_SHOW_LEVEL
Russell Kingb1b3f492012-10-06 17:12:25 +010029 select GENERIC_PCI_IOMAP
Stephen Boyd38ff87f2013-06-01 23:39:40 -070030 select GENERIC_SCHED_CLOCK
Russell Kingb1b3f492012-10-06 17:12:25 +010031 select GENERIC_SMP_IDLE_THREAD
32 select GENERIC_STRNCPY_FROM_USER
33 select GENERIC_STRNLEN_USER
Marc Zyngiera71b0922014-08-26 11:03:18 +010034 select HANDLE_DOMAIN_IRQ
Russell Kingb1b3f492012-10-06 17:12:25 +010035 select HARDIRQS_SW_RESEND
AKASHI Takahiro7a017722014-02-25 18:16:24 +090036 select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT)
Yalin Wang0b7857d2015-01-16 02:45:55 +010037 select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6
Arnd Bergmann437682ee2015-11-19 13:30:42 +010038 select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU
39 select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU
Daniel Cashmane0c25d92016-01-14 15:19:57 -080040 select HAVE_ARCH_MMAP_RND_BITS if MMU
Kees Cook91702172013-11-09 00:51:56 +010041 select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
Wade Farnsworth0693bf62012-04-04 16:19:47 +010042 select HAVE_ARCH_TRACEHOOK
Jens Wiklanderb329f952016-01-04 15:42:55 +010043 select HAVE_ARM_SMCCC if CPU_V7
Daniel Borkmann60777762016-05-13 19:08:28 +020044 select HAVE_CBPF_JIT
Russell King51aaf812014-04-22 22:26:27 +010045 select HAVE_CC_STACKPROTECTOR
Russell King171b3f02013-09-12 21:24:42 +010046 select HAVE_CONTEXT_TRACKING
Russell Kingb1b3f492012-10-06 17:12:25 +010047 select HAVE_C_RECORDMCOUNT
48 select HAVE_DEBUG_KMEMLEAK
49 select HAVE_DMA_API_DEBUG
Russell Kingb1b3f492012-10-06 17:12:25 +010050 select HAVE_DMA_CONTIGUOUS if MMU
Arnd Bergmann437682ee2015-11-19 13:30:42 +010051 select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) && !CPU_ENDIAN_BE32 && MMU
Will Deacondce5c9e2013-12-17 19:50:16 +010052 select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU
Jiri Slaby5f56a5d2016-05-20 17:00:16 -070053 select HAVE_EXIT_THREAD
Russell Kingb1b3f492012-10-06 17:12:25 +010054 select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
55 select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
56 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
57 select HAVE_GENERIC_DMA_COHERENT
Russell Kingb1b3f492012-10-06 17:12:25 +010058 select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
59 select HAVE_IDE if PCI || ISA || PCMCIA
Russell King87c46b62013-05-04 14:38:59 +010060 select HAVE_IRQ_TIME_ACCOUNTING
Russell Kingb1b3f492012-10-06 17:12:25 +010061 select HAVE_KERNEL_GZIP
Kyungsik Leef9b493a2013-07-08 16:01:48 -070062 select HAVE_KERNEL_LZ4
Russell Kingb1b3f492012-10-06 17:12:25 +010063 select HAVE_KERNEL_LZMA
64 select HAVE_KERNEL_LZO
65 select HAVE_KERNEL_XZ
Arnd Bergmanncb1293e2015-05-26 15:40:44 +010066 select HAVE_KPROBES if !XIP_KERNEL && !CPU_ENDIAN_BE32 && !CPU_V7M
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -080067 select HAVE_KRETPROBES if (HAVE_KPROBES)
Russell Kingb1b3f492012-10-06 17:12:25 +010068 select HAVE_MEMBLOCK
Ard Biesheuvel7d485f62014-11-24 16:54:35 +010069 select HAVE_MOD_ARCH_SPECIFIC
Petr Mladek42a0bb32016-05-20 17:00:33 -070070 select HAVE_NMI
Russell Kingb1b3f492012-10-06 17:12:25 +010071 select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
Wang Nan0dc016d2015-01-09 14:37:36 +080072 select HAVE_OPTPROBES if !THUMB2_KERNEL
Jamie Iles7ada1892010-02-02 20:24:58 +010073 select HAVE_PERF_EVENTS
Will Deacon49863892013-09-26 12:36:35 +010074 select HAVE_PERF_REGS
75 select HAVE_PERF_USER_STACK_DUMP
Steve Cappera0ad5492014-10-09 15:29:18 -070076 select HAVE_RCU_TABLE_FREE if (SMP && ARM_LPAE)
Will Deacone513f8b2010-06-25 12:24:53 +010077 select HAVE_REGS_AND_STACK_ACCESS_API
Russell Kingb1b3f492012-10-06 17:12:25 +010078 select HAVE_SYSCALL_TRACEPOINTS
Catalin Marinasaf1839e2012-10-08 16:28:08 -070079 select HAVE_UID16
Kevin Hilman31c1fc82013-09-16 15:28:22 -070080 select HAVE_VIRT_CPU_ACCOUNTING_GEN
Thomas Gleixnerda0ec6f2013-08-14 20:43:17 +010081 select IRQ_FORCED_THREADING
Russell King171b3f02013-09-12 21:24:42 +010082 select MODULES_USE_ELF_REL
Santosh Shilimkar84f452b2013-06-30 00:28:46 -040083 select NO_BOOTMEM
Arnd Bergmannaa7d5f12015-11-19 13:20:54 +010084 select OF_EARLY_FLATTREE if OF
85 select OF_RESERVED_MEM if OF
Russell King171b3f02013-09-12 21:24:42 +010086 select OLD_SIGACTION
87 select OLD_SIGSUSPEND3
Russell Kingb1b3f492012-10-06 17:12:25 +010088 select PERF_USE_VMALLOC
89 select RTC_LIB
90 select SYS_SUPPORTS_APM_EMULATION
Russell King171b3f02013-09-12 21:24:42 +010091 # Above selects are sorted alphabetically; please add new ones
92 # according to that. Thanks.
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 help
94 The ARM series is a line of low-power-consumption RISC chip designs
Martin Michlmayrf6c89652006-02-08 21:09:07 +000095 licensed by ARM Ltd and targeted at embedded applications and
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
Martin Michlmayrf6c89652006-02-08 21:09:07 +000097 manufactured, but legacy ARM-based PC hardware remains popular in
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 Europe. There is an ARM Linux project with a web page at
99 <http://www.arm.linux.org.uk/>.
100
Russell King74facff2011-06-02 11:16:22 +0100101config ARM_HAS_SG_CHAIN
Laura Abbott308c09f2014-08-08 14:23:25 -0700102 select ARCH_HAS_SG_CHAIN
Russell King74facff2011-06-02 11:16:22 +0100103 bool
104
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200105config NEED_SG_DMA_LENGTH
106 bool
107
108config ARM_DMA_USE_IOMMU
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200109 bool
Russell Kingb1b3f492012-10-06 17:12:25 +0100110 select ARM_HAS_SG_CHAIN
111 select NEED_SG_DMA_LENGTH
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200112
Seung-Woo Kim60460ab2013-02-06 13:21:14 +0900113if ARM_DMA_USE_IOMMU
114
115config ARM_DMA_IOMMU_ALIGNMENT
116 int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
117 range 4 9
118 default 8
119 help
120 DMA mapping framework by default aligns all buffers to the smallest
121 PAGE_SIZE order which is greater than or equal to the requested buffer
122 size. This works well for buffers up to a few hundreds kilobytes, but
123 for larger buffers it just a waste of address space. Drivers which has
124 relatively small addressing window (like 64Mib) might run out of
125 virtual space with just a few allocations.
126
127 With this parameter you can specify the maximum PAGE_SIZE order for
128 DMA IOMMU buffers. Larger buffers will be aligned only to this
129 specified order. The order is expressed as a power of two multiplied
130 by the PAGE_SIZE.
131
132endif
133
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +0100134config MIGHT_HAVE_PCI
135 bool
136
Ralf Baechle75e71532007-02-09 17:08:58 +0000137config SYS_SUPPORTS_APM_EMULATION
138 bool
139
Linus Walleijbc581772009-09-15 17:30:37 +0100140config HAVE_TCM
141 bool
142 select GENERIC_ALLOCATOR
143
Russell Kinge119bff2010-01-10 17:23:29 +0000144config HAVE_PROC_CPU
145 bool
146
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700147config NO_IOPORT_MAP
Al Viro5ea81762007-02-11 15:41:31 +0000148 bool
Al Viro5ea81762007-02-11 15:41:31 +0000149
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150config EISA
151 bool
152 ---help---
153 The Extended Industry Standard Architecture (EISA) bus was
154 developed as an open alternative to the IBM MicroChannel bus.
155
156 The EISA bus provided some of the features of the IBM MicroChannel
157 bus while maintaining backward compatibility with cards made for
158 the older ISA bus. The EISA bus saw limited use between 1988 and
159 1995 when it was made obsolete by the PCI bus.
160
161 Say Y here if you are building a kernel for an EISA-based machine.
162
163 Otherwise, say N.
164
165config SBUS
166 bool
167
Russell Kingf16fb1e2007-04-28 09:59:37 +0100168config STACKTRACE_SUPPORT
169 bool
170 default y
171
172config LOCKDEP_SUPPORT
173 bool
174 default y
175
Russell King7ad1bcb2006-08-27 12:07:02 +0100176config TRACE_IRQFLAGS_SUPPORT
177 bool
Arnd Bergmanncb1293e2015-05-26 15:40:44 +0100178 default !CPU_V7M
Russell King7ad1bcb2006-08-27 12:07:02 +0100179
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180config RWSEM_XCHGADD_ALGORITHM
181 bool
Will Deacon8a874112014-05-02 17:06:19 +0100182 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
David Howellsf0d1b0b2006-12-08 02:37:49 -0800184config ARCH_HAS_ILOG2_U32
185 bool
David Howellsf0d1b0b2006-12-08 02:37:49 -0800186
187config ARCH_HAS_ILOG2_U64
188 bool
David Howellsf0d1b0b2006-12-08 02:37:49 -0800189
Eduardo Valentin4a1b5732013-06-13 22:58:52 +0100190config ARCH_HAS_BANDGAP
191 bool
192
Stefan Agnera5f4c562015-08-13 00:01:52 +0100193config FIX_EARLYCON_MEM
194 def_bool y if MMU
195
Akinobu Mitab89c3b12006-03-26 01:39:19 -0800196config GENERIC_HWEIGHT
197 bool
198 default y
199
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200config GENERIC_CALIBRATE_DELAY
201 bool
202 default y
203
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100204config ARCH_MAY_HAVE_PC_FDC
205 bool
206
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800207config ZONE_DMA
208 bool
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800209
FUJITA Tomonoriccd7ab72010-03-10 15:23:23 -0800210config NEED_DMA_MAP_STATE
211 def_bool y
212
David A. Longc7edc9e2014-03-07 11:23:04 -0500213config ARCH_SUPPORTS_UPROBES
214 def_bool y
215
Rob Herring58af4a22012-03-20 14:33:01 -0500216config ARCH_HAS_DMA_SET_COHERENT_MASK
217 bool
218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219config GENERIC_ISA_DMA
220 bool
221
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222config FIQ
223 bool
224
Rob Herring13a50452012-02-07 09:28:22 -0600225config NEED_RET_TO_USER
226 bool
227
Al Viro034d2f52005-12-19 16:27:59 -0500228config ARCH_MTD_XIP
229 bool
230
Hyok S. Choic760fc12006-03-27 15:18:50 +0100231config VECTORS_BASE
232 hex
Hyok S. Choi6afd6fa2006-09-28 21:46:34 +0900233 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
Hyok S. Choic760fc12006-03-27 15:18:50 +0100234 default DRAM_BASE if REMAP_VECTORS_TO_RAM
235 default 0x00000000
236 help
Russell King19accfd2013-07-04 11:40:32 +0100237 The base address of exception vectors. This must be two pages
238 in size.
Hyok S. Choic760fc12006-03-27 15:18:50 +0100239
Russell Kingdc21af92011-01-04 19:09:43 +0000240config ARM_PATCH_PHYS_VIRT
Russell Kingc1beced2011-08-10 10:23:45 +0100241 bool "Patch physical to virtual translations at runtime" if EMBEDDED
242 default y
Nicolas Pitreb511d752011-02-21 06:53:35 +0100243 depends on !XIP_KERNEL && MMU
Russell Kingdc21af92011-01-04 19:09:43 +0000244 help
Russell King111e9a52011-05-12 10:02:42 +0100245 Patch phys-to-virt and virt-to-phys translation functions at
246 boot and module load time according to the position of the
247 kernel in system memory.
Russell Kingdc21af92011-01-04 19:09:43 +0000248
Russell King111e9a52011-05-12 10:02:42 +0100249 This can only be used with non-XIP MMU kernels where the base
Nicolas Pitredaece592011-08-12 00:14:29 +0100250 of physical memory is at a 16MB boundary.
Russell Kingdc21af92011-01-04 19:09:43 +0000251
Russell Kingc1beced2011-08-10 10:23:45 +0100252 Only disable this option if you know that you do not require
253 this feature (eg, building a kernel for a single machine) and
254 you need to shrink the kernel to the minimal size.
255
Rob Herringc334bc12012-03-04 22:03:33 -0600256config NEED_MACH_IO_H
257 bool
258 help
259 Select this when mach/io.h is required to provide special
260 definitions for this platform. The need for mach/io.h should
261 be avoided when possible.
262
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400263config NEED_MACH_MEMORY_H
Nicolas Pitre1b9f95f2011-07-05 22:52:51 -0400264 bool
Russell King111e9a52011-05-12 10:02:42 +0100265 help
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400266 Select this when mach/memory.h is required to provide special
267 definitions for this platform. The need for mach/memory.h should
268 be avoided when possible.
Nicolas Pitre1b9f95f2011-07-05 22:52:51 -0400269
270config PHYS_OFFSET
Nicolas Pitre974c0722011-12-02 23:09:42 +0100271 hex "Physical address of main memory" if MMU
Uwe Kleine-Königc6f54a92014-07-23 20:37:43 +0100272 depends on !ARM_PATCH_PHYS_VIRT
Nicolas Pitre974c0722011-12-02 23:09:42 +0100273 default DRAM_BASE if !MMU
Uwe Kleine-Königc6f54a92014-07-23 20:37:43 +0100274 default 0x00000000 if ARCH_EBSA110 || \
Uwe Kleine-Königc6f54a92014-07-23 20:37:43 +0100275 ARCH_FOOTBRIDGE || \
276 ARCH_INTEGRATOR || \
277 ARCH_IOP13XX || \
278 ARCH_KS8695 || \
279 (ARCH_REALVIEW && !REALVIEW_HIGH_PHYS_OFFSET)
280 default 0x10000000 if ARCH_OMAP1 || ARCH_RPC
281 default 0x20000000 if ARCH_S5PV210
282 default 0x70000000 if REALVIEW_HIGH_PHYS_OFFSET
H Hartley Sweetenb8824c92015-06-15 10:35:06 -0700283 default 0xc0000000 if ARCH_SA1100
Nicolas Pitre1b9f95f2011-07-05 22:52:51 -0400284 help
285 Please provide the physical address corresponding to the
286 location of main memory in your system.
Russell Kingcada3c02011-01-04 19:39:29 +0000287
Simon Glass87e040b2011-08-16 23:44:26 +0100288config GENERIC_BUG
289 def_bool y
290 depends on BUG
291
Kirill A. Shutemov1bcad262015-04-14 15:45:42 -0700292config PGTABLE_LEVELS
293 int
294 default 3 if ARM_LPAE
295 default 2
296
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297source "init/Kconfig"
298
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700299source "kernel/Kconfig.freezer"
300
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301menu "System Type"
302
Hyok S. Choi3c427972009-07-24 12:35:00 +0100303config MMU
304 bool "MMU-based Paged Memory Management Support"
305 default y
306 help
307 Select if you want MMU-based virtualised addressing space
308 support by paged memory management. If unsure, say 'Y'.
309
Daniel Cashmane0c25d92016-01-14 15:19:57 -0800310config ARCH_MMAP_RND_BITS_MIN
311 default 8
312
313config ARCH_MMAP_RND_BITS_MAX
314 default 14 if PAGE_OFFSET=0x40000000
315 default 15 if PAGE_OFFSET=0x80000000
316 default 16
317
Russell Kingccf50e22010-03-15 19:03:06 +0000318#
319# The "ARM system type" choice list is ordered alphabetically by option
320# text. Please add new entries in the option alphabetic order.
321#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322choice
323 prompt "ARM system type"
Arnd Bergmann70722802015-12-17 17:45:47 +0100324 default ARM_SINGLE_ARMV7M if !MMU
Arnd Bergmann1420b222013-02-14 13:33:36 +0100325 default ARCH_MULTIPLATFORM if MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326
Rob Herring387798b2012-09-06 13:41:12 -0500327config ARCH_MULTIPLATFORM
328 bool "Allow multiple platforms to be selected"
Russell Kingb1b3f492012-10-06 17:12:25 +0100329 depends on MMU
Rob Herringddb902c2013-11-22 09:29:37 -0600330 select ARCH_WANT_OPTIONAL_GPIOLIB
Olof Johansson42dc8362014-03-09 12:46:59 -0700331 select ARM_HAS_SG_CHAIN
Rob Herring387798b2012-09-06 13:41:12 -0500332 select ARM_PATCH_PHYS_VIRT
333 select AUTO_ZRELADDR
Rob Herring6d0add42014-04-16 08:42:13 -0500334 select CLKSRC_OF
Dinh Nguyen66314222012-07-18 16:07:18 -0600335 select COMMON_CLK
Rob Herringddb902c2013-11-22 09:29:37 -0600336 select GENERIC_CLOCKEVENTS
Will Deacon08d38be2014-05-27 23:26:35 +0100337 select MIGHT_HAVE_PCI
Rob Herring387798b2012-09-06 13:41:12 -0500338 select MULTI_IRQ_HANDLER
Dinh Nguyen66314222012-07-18 16:07:18 -0600339 select SPARSE_IRQ
340 select USE_OF
Dinh Nguyen66314222012-07-18 16:07:18 -0600341
Stefan Agner9c77bc42015-05-20 00:03:51 +0200342config ARM_SINGLE_ARMV7M
343 bool "ARMv7-M based platforms (Cortex-M0/M3/M4)"
344 depends on !MMU
345 select ARCH_WANT_OPTIONAL_GPIOLIB
346 select ARM_NVIC
Stefan Agner499f1642015-05-21 00:35:44 +0200347 select AUTO_ZRELADDR
Stefan Agner9c77bc42015-05-20 00:03:51 +0200348 select CLKSRC_OF
349 select COMMON_CLK
350 select CPU_V7M
351 select GENERIC_CLOCKEVENTS
352 select NO_IOPORT_MAP
353 select SPARSE_IRQ
354 select USE_OF
355
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100356
Russell King93e22562012-10-12 14:20:52 +0100357config ARCH_CLPS711X
358 bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +0400359 select ARCH_REQUIRE_GPIOLIB
Alexander Shiyanea7d1bc2012-11-17 17:57:11 +0400360 select AUTO_ZRELADDR
Alexander Shiyanc99f72a2013-05-13 21:07:32 +0400361 select CLKSRC_MMIO
Russell King93e22562012-10-12 14:20:52 +0100362 select COMMON_CLK
363 select CPU_ARM720T
Alexander Shiyan4a8355c2012-10-10 19:45:27 +0400364 select GENERIC_CLOCKEVENTS
Alexander Shiyan65976192013-05-13 21:07:36 +0400365 select MFD_SYSCON
Alexander Shiyane4e3a372014-08-19 16:31:15 +0400366 select SOC_BUS
Russell King93e22562012-10-12 14:20:52 +0100367 help
368 Support for Cirrus Logic 711x/721x/731x based boards.
369
Russell King788c9702009-04-26 14:21:59 +0100370config ARCH_GEMINI
371 bool "Cortina Systems Gemini"
Russell King788c9702009-04-26 14:21:59 +0100372 select ARCH_REQUIRE_GPIOLIB
Linus Walleijf3372c02013-10-01 12:57:20 +0200373 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100374 select CPU_FA526
Linus Walleijf3372c02013-10-01 12:57:20 +0200375 select GENERIC_CLOCKEVENTS
Russell King788c9702009-04-26 14:21:59 +0100376 help
377 Support for the Cortina Systems Gemini family SoCs
378
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379config ARCH_EBSA110
380 bool "EBSA-110"
Russell Kingb1b3f492012-10-06 17:12:25 +0100381 select ARCH_USES_GETTIMEOFFSET
Russell Kingc7508152008-10-26 10:55:14 +0000382 select CPU_SA110
Russell Kingf7e68bb2005-05-05 14:49:01 +0100383 select ISA
Rob Herringc334bc12012-03-04 22:03:33 -0600384 select NEED_MACH_IO_H
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400385 select NEED_MACH_MEMORY_H
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700386 select NO_IOPORT_MAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 help
388 This is an evaluation board for the StrongARM processor available
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000389 from Digital. It has limited hardware on-board, including an
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 Ethernet interface, two PCMCIA sockets, two serial ports and a
391 parallel port.
392
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000393config ARCH_EP93XX
394 bool "EP93xx-based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100395 select ARCH_HAS_HOLES_MEMORYMODEL
396 select ARCH_REQUIRE_GPIOLIB
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000397 select ARM_AMBA
H Hartley Sweetenb8824c92015-06-15 10:35:06 -0700398 select ARM_PATCH_PHYS_VIRT
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000399 select ARM_VIC
H Hartley Sweetenb8824c92015-06-15 10:35:06 -0700400 select AUTO_ZRELADDR
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100401 select CLKDEV_LOOKUP
Linus Walleij000bc172015-06-15 14:34:03 +0200402 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100403 select CPU_ARM920T
Linus Walleij000bc172015-06-15 14:34:03 +0200404 select GENERIC_CLOCKEVENTS
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000405 help
406 This enables support for the Cirrus EP93xx series of CPUs.
407
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408config ARCH_FOOTBRIDGE
409 bool "FootBridge"
Russell Kingc7508152008-10-26 10:55:14 +0000410 select CPU_SA110
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 select FOOTBRIDGE
Russell King4e8d7632011-01-28 21:00:39 +0000412 select GENERIC_CLOCKEVENTS
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200413 select HAVE_IDE
Rob Herring8ef6e622012-03-01 20:48:12 -0600414 select NEED_MACH_IO_H if !MMU
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400415 select NEED_MACH_MEMORY_H
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000416 help
417 Support for systems based on the DC21285 companion chip
418 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100420config ARCH_NETX
421 bool "Hilscher NetX based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100422 select ARM_VIC
Russell King234b6ced2011-05-08 14:09:47 +0100423 select CLKSRC_MMIO
Russell Kingc7508152008-10-26 10:55:14 +0000424 select CPU_ARM926T
Uwe Kleine-König2fcfe6b2008-12-09 21:57:24 +0100425 select GENERIC_CLOCKEVENTS
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000426 help
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100427 This enables support for systems based on the Hilscher NetX Soc
428
Russell King3b938be2007-05-12 11:25:44 +0100429config ARCH_IOP13XX
430 bool "IOP13xx-based"
431 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100432 select CPU_XSC3
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400433 select NEED_MACH_MEMORY_H
Rob Herring13a50452012-02-07 09:28:22 -0600434 select NEED_RET_TO_USER
Russell Kingb1b3f492012-10-06 17:12:25 +0100435 select PCI
436 select PLAT_IOP
437 select VMSPLIT_1G
Thomas Gleixner37ebbcf2014-05-07 15:44:04 +0000438 select SPARSE_IRQ
Russell King3b938be2007-05-12 11:25:44 +0100439 help
440 Support for Intel's IOP13XX (XScale) family of processors.
441
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100442config ARCH_IOP32X
443 bool "IOP32x-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100444 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100445 select ARCH_REQUIRE_GPIOLIB
Russell Kingc7508152008-10-26 10:55:14 +0000446 select CPU_XSCALE
Linus Walleije9004f52013-09-09 11:59:51 +0200447 select GPIO_IOP
Rob Herring13a50452012-02-07 09:28:22 -0600448 select NEED_RET_TO_USER
Russell Kingf7e68bb2005-05-05 14:49:01 +0100449 select PCI
Russell Kingb1b3f492012-10-06 17:12:25 +0100450 select PLAT_IOP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000451 help
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100452 Support for Intel's 80219 and IOP32X (XScale) family of
453 processors.
454
455config ARCH_IOP33X
456 bool "IOP33x-based"
457 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100458 select ARCH_REQUIRE_GPIOLIB
Russell Kingc7508152008-10-26 10:55:14 +0000459 select CPU_XSCALE
Linus Walleije9004f52013-09-09 11:59:51 +0200460 select GPIO_IOP
Rob Herring13a50452012-02-07 09:28:22 -0600461 select NEED_RET_TO_USER
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100462 select PCI
Russell Kingb1b3f492012-10-06 17:12:25 +0100463 select PLAT_IOP
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100464 help
465 Support for Intel's IOP33X (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466
Russell King3b938be2007-05-12 11:25:44 +0100467config ARCH_IXP4XX
468 bool "IXP4xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100469 depends on MMU
Rob Herring58af4a22012-03-20 14:33:01 -0500470 select ARCH_HAS_DMA_SET_COHERENT_MASK
Russell Kingb1b3f492012-10-06 17:12:25 +0100471 select ARCH_REQUIRE_GPIOLIB
Russell King51aaf812014-04-22 22:26:27 +0100472 select ARCH_SUPPORTS_BIG_ENDIAN
Russell King234b6ced2011-05-08 14:09:47 +0100473 select CLKSRC_MMIO
Russell Kingc7508152008-10-26 10:55:14 +0000474 select CPU_XSCALE
Russell Kingb1b3f492012-10-06 17:12:25 +0100475 select DMABOUNCE if PCI
Russell King3b938be2007-05-12 11:25:44 +0100476 select GENERIC_CLOCKEVENTS
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +0100477 select MIGHT_HAVE_PCI
Rob Herringc334bc12012-03-04 22:03:33 -0600478 select NEED_MACH_IO_H
Florian Fainelli9296d942013-04-09 14:29:26 +0200479 select USB_EHCI_BIG_ENDIAN_DESC
Russell King171b3f02013-09-12 21:24:42 +0100480 select USB_EHCI_BIG_ENDIAN_MMIO
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100481 help
Russell King3b938be2007-05-12 11:25:44 +0100482 Support for Intel's IXP4XX (XScale) family of processors.
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100483
Saeed Bisharaedabd382009-08-06 15:12:43 +0300484config ARCH_DOVE
485 bool "Marvell Dove"
Saeed Bisharaedabd382009-08-06 15:12:43 +0300486 select ARCH_REQUIRE_GPIOLIB
Sebastian Hesselbarth756b2532013-05-02 19:56:12 +0100487 select CPU_PJ4
Saeed Bisharaedabd382009-08-06 15:12:43 +0300488 select GENERIC_CLOCKEVENTS
Russell King0f81bd42012-09-09 20:34:13 +0100489 select MIGHT_HAVE_PCI
Arnd Bergmannb8cd3372015-12-02 22:27:04 +0100490 select MULTI_IRQ_HANDLER
Russell King171b3f02013-09-12 21:24:42 +0100491 select MVEBU_MBUS
Sebastian Hesselbarth9139acd2012-11-19 10:39:55 +0100492 select PINCTRL
493 select PINCTRL_DOVE
Thomas Petazzoniabcda1d2012-09-11 14:27:27 +0200494 select PLAT_ORION_LEGACY
Arnd Bergmann5cdbe5d2015-12-02 22:27:05 +0100495 select SPARSE_IRQ
Russell Kingc5d431e2015-12-08 10:58:09 +0000496 select PM_GENERIC_DOMAINS if PM
Saeed Bisharaedabd382009-08-06 15:12:43 +0300497 help
498 Support for the Marvell Dove SoC 88AP510
499
Andrew Victorc53c9cf2007-05-11 21:01:28 +0100500config ARCH_KS8695
501 bool "Micrel/Kendin KS8695"
Hartley Sweeten98830bc2010-05-17 17:18:10 +0100502 select ARCH_REQUIRE_GPIOLIB
Linus Walleijc7e783d2012-08-29 20:27:22 +0200503 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100504 select CPU_ARM922T
Linus Walleijc7e783d2012-08-29 20:27:22 +0200505 select GENERIC_CLOCKEVENTS
Russell Kingb1b3f492012-10-06 17:12:25 +0100506 select NEED_MACH_MEMORY_H
Andrew Victorc53c9cf2007-05-11 21:01:28 +0100507 help
508 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
509 System-on-Chip devices.
510
Russell King788c9702009-04-26 14:21:59 +0100511config ARCH_W90X900
512 bool "Nuvoton W90X900 CPU"
wanzongshunc52d3d62009-06-10 15:49:32 +0100513 select ARCH_REQUIRE_GPIOLIB
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100514 select CLKDEV_LOOKUP
Russell King6fa5d5f2011-05-08 15:34:39 +0100515 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100516 select CPU_ARM926T
wanzongshun58b53692009-08-14 15:36:44 +0100517 select GENERIC_CLOCKEVENTS
Lennert Buytenhek777f9be2008-06-22 22:45:02 +0200518 help
wanzongshuna8bc4ea2009-08-14 15:38:29 +0100519 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
520 At present, the w90x900 has been renamed nuc900, regarding
521 the ARM series product line, you can login the following
522 link address to know more.
523
524 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
525 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
Tzachi Perelstein585cf172007-10-23 15:14:41 -0400526
Russell King93e22562012-10-12 14:20:52 +0100527config ARCH_LPC32XX
528 bool "NXP LPC32XX"
529 select ARCH_REQUIRE_GPIOLIB
530 select ARM_AMBA
Russell King40737232011-01-06 22:32:52 +0000531 select CLKDEV_LOOKUP
Vladimir Zapolskiyc227f122015-11-20 03:05:10 +0200532 select CLKSRC_LPC32XX
533 select COMMON_CLK
Russell King93e22562012-10-12 14:20:52 +0100534 select CPU_ARM926T
535 select GENERIC_CLOCKEVENTS
Vladimir Zapolskiy8cb17b52016-04-25 04:00:38 +0300536 select MULTI_IRQ_HANDLER
537 select SPARSE_IRQ
Russell King93e22562012-10-12 14:20:52 +0100538 select USE_OF
539 help
540 Support for the NXP LPC32XX family of processors
541
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542config ARCH_PXA
eric miao2c8086a2007-09-11 19:13:17 -0700543 bool "PXA2xx/PXA3xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100544 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100545 select ARCH_MTD_XIP
546 select ARCH_REQUIRE_GPIOLIB
547 select ARM_CPU_SUSPEND if PM
548 select AUTO_ZRELADDR
Robert Jarzmika1c0a6a2015-02-07 22:54:03 +0100549 select COMMON_CLK
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100550 select CLKDEV_LOOKUP
Daniel Lezcano389d9b52015-10-09 15:48:38 +0200551 select CLKSRC_PXA
Russell King234b6ced2011-05-08 14:09:47 +0100552 select CLKSRC_MMIO
Robert Jarzmik6f6caea2014-07-14 18:52:03 +0200553 select CLKSRC_OF
Arnd Bergmann2f202862016-01-29 15:06:29 +0100554 select CPU_XSCALE if !CPU_XSC3
Eric Miao981d0f32007-07-24 01:22:43 +0100555 select GENERIC_CLOCKEVENTS
Haojian Zhuang157d2642011-10-17 20:37:52 +0800556 select GPIO_PXA
Russell Kingb1b3f492012-10-06 17:12:25 +0100557 select HAVE_IDE
Robert Jarzmikd6cf30c2015-02-14 22:41:56 +0100558 select IRQ_DOMAIN
Russell Kingb1b3f492012-10-06 17:12:25 +0100559 select MULTI_IRQ_HANDLER
Eric Miaobd5ce432009-01-20 12:06:01 +0800560 select PLAT_PXA
Haojian Zhuang6ac6b812010-08-20 15:23:59 +0800561 select SPARSE_IRQ
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000562 help
eric miao2c8086a2007-09-11 19:13:17 -0700563 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
565config ARCH_RPC
566 bool "RiscPC"
Russell King868e87c2015-09-28 10:31:50 +0100567 depends on MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 select ARCH_ACORN
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100569 select ARCH_MAY_HAVE_PC_FDC
Russell King07f841b2008-10-01 17:11:06 +0100570 select ARCH_SPARSEMEM_ENABLE
John Stultz5cfc8ee2010-03-24 00:22:36 +0000571 select ARCH_USES_GETTIMEOFFSET
Arnd Bergmannfa04e202014-02-26 17:39:12 +0100572 select CPU_SA110
Russell Kingb1b3f492012-10-06 17:12:25 +0100573 select FIQ
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200574 select HAVE_IDE
Russell Kingb1b3f492012-10-06 17:12:25 +0100575 select HAVE_PATA_PLATFORM
576 select ISA_DMA_API
Rob Herringc334bc12012-03-04 22:03:33 -0600577 select NEED_MACH_IO_H
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400578 select NEED_MACH_MEMORY_H
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700579 select NO_IOPORT_MAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 help
581 On the Acorn Risc-PC, Linux can support the internal IDE disk and
582 CD-ROM interface, serial and parallel port, and the floppy drive.
583
584config ARCH_SA1100
585 bool "SA1100-based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100586 select ARCH_MTD_XIP
Michael Buesch7444a722008-07-25 01:46:11 -0700587 select ARCH_REQUIRE_GPIOLIB
Russell Kingb1b3f492012-10-06 17:12:25 +0100588 select ARCH_SPARSEMEM_ENABLE
589 select CLKDEV_LOOKUP
590 select CLKSRC_MMIO
Daniel Lezcano389d9b52015-10-09 15:48:38 +0200591 select CLKSRC_PXA
592 select CLKSRC_OF if OF
Russell Kingb1b3f492012-10-06 17:12:25 +0100593 select CPU_FREQ
594 select CPU_SA1100
595 select GENERIC_CLOCKEVENTS
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200596 select HAVE_IDE
Dmitry Eremin-Solenikov1eca42b2014-11-28 15:56:54 +0100597 select IRQ_DOMAIN
Russell Kingb1b3f492012-10-06 17:12:25 +0100598 select ISA
Dmitry Eremin-Solenikovaffcab32014-11-28 15:55:16 +0100599 select MULTI_IRQ_HANDLER
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400600 select NEED_MACH_MEMORY_H
Russell King375dec92012-02-23 14:29:33 +0100601 select SPARSE_IRQ
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000602 help
603 Support for StrongARM 11x0 based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900605config ARCH_S3C24XX
606 bool "Samsung S3C24XX SoCs"
Kukjin Kim53650432013-04-04 09:04:30 +0900607 select ARCH_REQUIRE_GPIOLIB
Arnd Bergmann335cce72014-03-13 14:11:16 +0100608 select ATAGS
Russell Kingb1b3f492012-10-06 17:12:25 +0100609 select CLKDEV_LOOKUP
Tomasz Figa42805062013-04-28 02:25:01 +0200610 select CLKSRC_SAMSUNG_PWM
Romain Naour7f78b6e2013-01-09 18:47:04 -0800611 select GENERIC_CLOCKEVENTS
Tomasz Figa880cf072013-06-19 01:22:20 +0900612 select GPIO_SAMSUNG
Kukjin Kim20676c12010-11-13 16:08:32 +0900613 select HAVE_S3C2410_I2C if I2C
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900614 select HAVE_S3C2410_WATCHDOG if WATCHDOG
Russell Kingb1b3f492012-10-06 17:12:25 +0100615 select HAVE_S3C_RTC if RTC_CLASS
Heiko Stuebner17453dd2013-03-07 12:38:25 +0900616 select MULTI_IRQ_HANDLER
Rob Herringc334bc12012-03-04 22:03:33 -0600617 select NEED_MACH_IO_H
Tomasz Figacd8dc7a2013-06-15 09:01:49 +0900618 select SAMSUNG_ATAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 help
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900620 Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
621 and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
622 (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
623 Samsung SMDK2410 development board (and derivatives).
Ben Dooks63b1f512010-04-30 16:32:26 +0900624
Kevin Hilman7c6337e2007-04-30 19:37:19 +0100625config ARCH_DAVINCI
626 bool "TI DaVinci"
Russell Kingb1b3f492012-10-06 17:12:25 +0100627 select ARCH_HAS_HOLES_MEMORYMODEL
David Brownelldce11152008-09-07 23:41:04 -0700628 select ARCH_REQUIRE_GPIOLIB
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100629 select CLKDEV_LOOKUP
Arnd Bergmannce32c5c2016-02-01 21:35:57 +0100630 select CPU_ARM926T
David Brownell20e99692009-05-07 09:31:42 -0700631 select GENERIC_ALLOCATOR
Russell Kingb1b3f492012-10-06 17:12:25 +0100632 select GENERIC_CLOCKEVENTS
Russell Kingdc7ad3b2011-05-22 10:01:21 +0100633 select GENERIC_IRQ_CHIP
Russell Kingb1b3f492012-10-06 17:12:25 +0100634 select HAVE_IDE
Sekhar Nori689e3312012-08-28 15:27:52 +0530635 select USE_OF
Russell Kingb1b3f492012-10-06 17:12:25 +0100636 select ZONE_DMA
Kevin Hilman7c6337e2007-04-30 19:37:19 +0100637 help
638 Support for TI's DaVinci platform.
639
Tony Lindgrena0694862013-01-11 11:24:20 -0800640config ARCH_OMAP1
641 bool "TI OMAP1"
Arnd Bergmann00a36692012-06-07 18:50:51 -0600642 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100643 select ARCH_HAS_HOLES_MEMORYMODEL
Tony Lindgrena0694862013-01-11 11:24:20 -0800644 select ARCH_OMAP
Alexey Charkov21f47fb2010-12-23 13:11:21 +0100645 select ARCH_REQUIRE_GPIOLIB
Tony Priske9a91de2012-08-03 21:00:06 +1200646 select CLKDEV_LOOKUP
viresh kumarcee37e52010-04-01 12:31:05 +0100647 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100648 select GENERIC_CLOCKEVENTS
Tony Lindgrena0694862013-01-11 11:24:20 -0800649 select GENERIC_IRQ_CHIP
Tony Lindgrena0694862013-01-11 11:24:20 -0800650 select HAVE_IDE
651 select IRQ_DOMAIN
Tony Lindgrenb6943312015-05-20 09:01:21 -0700652 select MULTI_IRQ_HANDLER
Tony Lindgrena0694862013-01-11 11:24:20 -0800653 select NEED_MACH_IO_H if PCCARD
654 select NEED_MACH_MEMORY_H
Tony Lindgren685e2d02015-05-20 09:01:21 -0700655 select SPARSE_IRQ
Alexey Charkov21f47fb2010-12-23 13:11:21 +0100656 help
Tony Lindgrena0694862013-01-11 11:24:20 -0800657 Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
Binghua Duan02c981c2011-07-08 17:40:12 +0800658
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659endchoice
660
Rob Herring387798b2012-09-06 13:41:12 -0500661menu "Multiple platform selection"
662 depends on ARCH_MULTIPLATFORM
663
664comment "CPU Core family selection"
665
Arnd Bergmannf8afae42014-03-25 22:19:00 +0100666config ARCH_MULTI_V4
667 bool "ARMv4 based platforms (FA526)"
668 depends on !ARCH_MULTI_V6_V7
669 select ARCH_MULTI_V4_V5
670 select CPU_FA526
671
Rob Herring387798b2012-09-06 13:41:12 -0500672config ARCH_MULTI_V4T
673 bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
Rob Herring387798b2012-09-06 13:41:12 -0500674 depends on !ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100675 select ARCH_MULTI_V4_V5
Arnd Bergmann24e860f2013-06-03 15:38:58 +0200676 select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
677 CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
678 CPU_ARM925T || CPU_ARM940T)
Rob Herring387798b2012-09-06 13:41:12 -0500679
680config ARCH_MULTI_V5
681 bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
Rob Herring387798b2012-09-06 13:41:12 -0500682 depends on !ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100683 select ARCH_MULTI_V4_V5
Andrew Lunn12567bb2014-02-22 20:14:54 +0100684 select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \
Arnd Bergmann24e860f2013-06-03 15:38:58 +0200685 CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
686 CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
Rob Herring387798b2012-09-06 13:41:12 -0500687
688config ARCH_MULTI_V4_V5
689 bool
690
691config ARCH_MULTI_V6
Stephen Boyd8dda05c2013-03-04 15:19:19 -0800692 bool "ARMv6 based platforms (ARM11)"
Rob Herring387798b2012-09-06 13:41:12 -0500693 select ARCH_MULTI_V6_V7
Rob Herring42f47542014-01-31 14:26:04 -0600694 select CPU_V6K
Rob Herring387798b2012-09-06 13:41:12 -0500695
696config ARCH_MULTI_V7
Stephen Boyd8dda05c2013-03-04 15:19:19 -0800697 bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
Rob Herring387798b2012-09-06 13:41:12 -0500698 default y
699 select ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100700 select CPU_V7
Rob Herring90bc8ac2014-01-31 15:32:02 -0600701 select HAVE_SMP
Rob Herring387798b2012-09-06 13:41:12 -0500702
703config ARCH_MULTI_V6_V7
704 bool
Rob Herring9352b052014-01-31 15:36:10 -0600705 select MIGHT_HAVE_CACHE_L2X0
Rob Herring387798b2012-09-06 13:41:12 -0500706
707config ARCH_MULTI_CPU_AUTO
708 def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
709 select ARCH_MULTI_V5
710
711endmenu
712
Rob Herring05e2a3d2013-12-05 10:04:54 -0600713config ARCH_VIRT
Masahiro Yamadae3246542015-11-16 12:06:10 +0900714 bool "Dummy Virtual Machine"
715 depends on ARCH_MULTI_V7
Rob Herring4b8b5f22013-12-05 10:10:34 -0600716 select ARM_AMBA
Rob Herring05e2a3d2013-12-05 10:04:54 -0600717 select ARM_GIC
Pavel Fedin0e2f91e2015-11-27 12:56:26 +0100718 select ARM_GIC_V2M if PCI_MSI
Jean-Philippe Brucker0b28f1d2015-10-01 13:47:18 +0100719 select ARM_GIC_V3
Rob Herring05e2a3d2013-12-05 10:04:54 -0600720 select ARM_PSCI
Rob Herring4b8b5f22013-12-05 10:10:34 -0600721 select HAVE_ARM_ARCH_TIMER
Rob Herring05e2a3d2013-12-05 10:04:54 -0600722
Russell Kingccf50e22010-03-15 19:03:06 +0000723#
724# This is sorted alphabetically by mach-* pathname. However, plat-*
725# Kconfigs may be included either alphabetically (according to the
726# plat- suffix) or along side the corresponding mach-* source.
727#
Gregory CLEMENT3e93a222012-06-04 18:38:56 +0200728source "arch/arm/mach-mvebu/Kconfig"
729
Tsahee Zidenberg445d9b32015-03-12 13:53:00 +0200730source "arch/arm/mach-alpine/Kconfig"
731
Lars Persson590b4602016-02-11 17:06:19 +0100732source "arch/arm/mach-artpec/Kconfig"
733
Oleksij Rempeld9bfc862014-11-24 12:08:27 +0100734source "arch/arm/mach-asm9260/Kconfig"
735
Russell King95b8f202010-01-14 11:43:54 +0000736source "arch/arm/mach-at91/Kconfig"
737
Anders Berg1d22924e2014-05-23 11:08:35 +0200738source "arch/arm/mach-axxia/Kconfig"
739
Christian Daudt8ac49e02012-11-19 09:46:10 -0800740source "arch/arm/mach-bcm/Kconfig"
741
Sebastian Hesselbarth1c37fa12013-09-09 14:36:19 +0200742source "arch/arm/mach-berlin/Kconfig"
743
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744source "arch/arm/mach-clps711x/Kconfig"
745
Anton Vorontsovd94f9442010-03-25 17:12:41 +0300746source "arch/arm/mach-cns3xxx/Kconfig"
747
Russell King95b8f202010-01-14 11:43:54 +0000748source "arch/arm/mach-davinci/Kconfig"
749
Baruch Siachdf8d7422015-01-14 10:40:30 +0200750source "arch/arm/mach-digicolor/Kconfig"
751
Russell King95b8f202010-01-14 11:43:54 +0000752source "arch/arm/mach-dove/Kconfig"
753
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000754source "arch/arm/mach-ep93xx/Kconfig"
755
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756source "arch/arm/mach-footbridge/Kconfig"
757
Paulius Zaleckas59d3a192009-03-26 10:06:08 +0200758source "arch/arm/mach-gemini/Kconfig"
759
Rob Herring387798b2012-09-06 13:41:12 -0500760source "arch/arm/mach-highbank/Kconfig"
761
Haojian Zhuang389ee0c2013-12-20 10:52:56 +0800762source "arch/arm/mach-hisi/Kconfig"
763
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764source "arch/arm/mach-integrator/Kconfig"
765
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100766source "arch/arm/mach-iop32x/Kconfig"
767
768source "arch/arm/mach-iop33x/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769
Dan Williams285f5fa2006-12-07 02:59:39 +0100770source "arch/arm/mach-iop13xx/Kconfig"
771
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772source "arch/arm/mach-ixp4xx/Kconfig"
773
Santosh Shilimkar828989a2013-06-10 11:27:13 -0400774source "arch/arm/mach-keystone/Kconfig"
775
Russell King95b8f202010-01-14 11:43:54 +0000776source "arch/arm/mach-ks8695/Kconfig"
777
Carlo Caione3b8f5032014-09-10 22:16:59 +0200778source "arch/arm/mach-meson/Kconfig"
779
Jonas Jensen17723fd32013-12-18 13:58:45 +0100780source "arch/arm/mach-moxart/Kconfig"
781
Joel Stanley8c2ed9b2016-03-21 17:22:31 +1030782source "arch/arm/mach-aspeed/Kconfig"
783
Stanislav Samsonov794d15b2008-06-22 22:45:10 +0200784source "arch/arm/mach-mv78xx0/Kconfig"
785
Shawn Guo3995eb82012-09-13 19:48:07 +0800786source "arch/arm/mach-imx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787
Matthias Bruggerf682a212014-05-13 01:06:13 +0200788source "arch/arm/mach-mediatek/Kconfig"
789
Shawn Guo1d3f33d2010-12-13 20:55:03 +0800790source "arch/arm/mach-mxs/Kconfig"
791
Russell King95b8f202010-01-14 11:43:54 +0000792source "arch/arm/mach-netx/Kconfig"
Eric Miao49cbe782009-01-20 14:15:18 +0800793
Russell King95b8f202010-01-14 11:43:54 +0000794source "arch/arm/mach-nomadik/Kconfig"
Russell King95b8f202010-01-14 11:43:54 +0000795
Daniel Tang9851ca52013-06-11 18:40:17 +1000796source "arch/arm/mach-nspire/Kconfig"
797
Tony Lindgrend48af152005-07-10 19:58:17 +0100798source "arch/arm/plat-omap/Kconfig"
799
800source "arch/arm/mach-omap1/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801
Tony Lindgren1dbae812005-11-10 14:26:51 +0000802source "arch/arm/mach-omap2/Kconfig"
803
Lennert Buytenhek9dd0b192008-03-27 14:51:41 -0400804source "arch/arm/mach-orion5x/Kconfig"
Tzachi Perelstein585cf172007-10-23 15:14:41 -0400805
Rob Herring387798b2012-09-06 13:41:12 -0500806source "arch/arm/mach-picoxcell/Kconfig"
807
Russell King95b8f202010-01-14 11:43:54 +0000808source "arch/arm/mach-pxa/Kconfig"
809source "arch/arm/plat-pxa/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810
Russell King95b8f202010-01-14 11:43:54 +0000811source "arch/arm/mach-mmp/Kconfig"
812
Neil Armstrong8c9184b2016-03-03 10:42:15 +0100813source "arch/arm/mach-oxnas/Kconfig"
814
Kumar Gala8fc1b0f2014-01-21 17:14:10 -0600815source "arch/arm/mach-qcom/Kconfig"
816
Russell King95b8f202010-01-14 11:43:54 +0000817source "arch/arm/mach-realview/Kconfig"
818
Heiko Stuebnerd63dc052013-06-02 23:09:41 +0200819source "arch/arm/mach-rockchip/Kconfig"
820
Russell King95b8f202010-01-14 11:43:54 +0000821source "arch/arm/mach-sa1100/Kconfig"
Saeed Bisharaedabd382009-08-06 15:12:43 +0300822
Rob Herring387798b2012-09-06 13:41:12 -0500823source "arch/arm/mach-socfpga/Kconfig"
824
Arnd Bergmanna7ed0992012-12-02 15:12:47 +0100825source "arch/arm/mach-spear/Kconfig"
Ben Dooksa21765a2007-02-11 18:31:01 +0100826
Srinivas Kandagatla65ebcc12013-06-25 12:15:10 +0100827source "arch/arm/mach-sti/Kconfig"
828
Kukjin Kim85fd6d62012-02-06 09:38:19 +0900829source "arch/arm/mach-s3c24xx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830
Ben Dooks431107e2010-01-26 10:11:04 +0900831source "arch/arm/mach-s3c64xx/Kconfig"
Ben Dooksa08ab632008-10-21 14:06:39 +0100832
Kukjin Kim170f4e42010-02-24 16:40:44 +0900833source "arch/arm/mach-s5pv210/Kconfig"
834
Kukjin Kim83014572011-11-06 13:54:56 +0900835source "arch/arm/mach-exynos/Kconfig"
Rob Herringe509b282014-06-10 09:06:09 -0500836source "arch/arm/plat-samsung/Kconfig"
Changhwan Youncc0e72b2010-07-16 12:15:38 +0900837
Russell King882d01f2010-03-02 23:40:15 +0000838source "arch/arm/mach-shmobile/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839
Maxime Ripard3b526342012-11-08 12:40:16 +0100840source "arch/arm/mach-sunxi/Kconfig"
841
Barry Song156a0992012-08-23 13:41:58 +0800842source "arch/arm/mach-prima2/Kconfig"
843
Marc Gonzalezd6de5b02015-12-15 10:41:13 +0100844source "arch/arm/mach-tango/Kconfig"
845
Erik Gillingc5f80062010-01-21 16:53:02 -0800846source "arch/arm/mach-tegra/Kconfig"
847
Russell King95b8f202010-01-14 11:43:54 +0000848source "arch/arm/mach-u300/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849
Masahiro Yamadaba56a982015-05-08 13:07:11 +0900850source "arch/arm/mach-uniphier/Kconfig"
851
Russell King95b8f202010-01-14 11:43:54 +0000852source "arch/arm/mach-ux500/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853
854source "arch/arm/mach-versatile/Kconfig"
855
Russell Kingceade892010-02-11 21:44:53 +0000856source "arch/arm/mach-vexpress/Kconfig"
Russell King420c34e2011-01-18 20:08:06 +0000857source "arch/arm/plat-versatile/Kconfig"
Russell Kingceade892010-02-11 21:44:53 +0000858
Tony Prisk6f35f9a2012-10-11 20:13:09 +1300859source "arch/arm/mach-vt8500/Kconfig"
860
wanzongshun7ec80dd2008-12-03 03:55:38 +0100861source "arch/arm/mach-w90x900/Kconfig"
862
Jun Nieacede512015-04-28 17:18:05 +0800863source "arch/arm/mach-zx/Kconfig"
864
Josh Cartwright9a45eb62012-11-19 11:38:29 -0600865source "arch/arm/mach-zynq/Kconfig"
866
Stefan Agner499f1642015-05-21 00:35:44 +0200867# ARMv7-M architecture
868config ARCH_EFM32
869 bool "Energy Micro efm32"
870 depends on ARM_SINGLE_ARMV7M
871 select ARCH_REQUIRE_GPIOLIB
872 help
873 Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko
874 processors.
875
876config ARCH_LPC18XX
877 bool "NXP LPC18xx/LPC43xx"
878 depends on ARM_SINGLE_ARMV7M
879 select ARCH_HAS_RESET_CONTROLLER
880 select ARM_AMBA
881 select CLKSRC_LPC32XX
882 select PINCTRL
883 help
884 Support for NXP's LPC18xx Cortex-M3 and LPC43xx Cortex-M4
885 high performance microcontrollers.
886
887config ARCH_STM32
888 bool "STMicrolectronics STM32"
889 depends on ARM_SINGLE_ARMV7M
890 select ARCH_HAS_RESET_CONTROLLER
891 select ARMV7M_SYSTICK
Maxime Coquelin25263182015-05-22 23:50:52 +0200892 select CLKSRC_STM32
Maxime Coquelinf64e9802015-10-14 18:32:42 +0200893 select PINCTRL
Stefan Agner499f1642015-05-21 00:35:44 +0200894 select RESET_CONTROLLER
895 help
896 Support for STMicroelectronics STM32 processors.
897
Maxime Coquelinfa65fc62015-10-14 18:21:32 +0200898config MACH_STM32F429
899 bool "STMicrolectronics STM32F429"
900 depends on ARCH_STM32
901 default y
902
Vladimir Murzin18471192016-04-25 09:49:13 +0100903config ARCH_MPS2
904 bool "ARM MPS2 paltform"
905 depends on ARM_SINGLE_ARMV7M
906 select ARM_AMBA
907 select CLKSRC_MPS2
908 help
909 Support for Cortex-M Prototyping System (or V2M-MPS2) which comes
910 with a range of available cores like Cortex-M3/M4/M7.
911
912 Please, note that depends which Application Note is used memory map
913 for the platform may vary, so adjustment of RAM base might be needed.
914
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915# Definitions to make life easier
916config ARCH_ACORN
917 bool
918
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100919config PLAT_IOP
920 bool
Mikael Pettersson469d30442009-10-29 11:46:54 -0700921 select GENERIC_CLOCKEVENTS
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100922
Lennert Buytenhek69b02f62008-03-27 14:51:39 -0400923config PLAT_ORION
924 bool
Russell Kingbfe45e02011-05-08 15:33:30 +0100925 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100926 select COMMON_CLK
Russell Kingdc7ad3b2011-05-22 10:01:21 +0100927 select GENERIC_IRQ_CHIP
Andrew Lunn278b45b2012-06-27 13:40:04 +0200928 select IRQ_DOMAIN
Lennert Buytenhek69b02f62008-03-27 14:51:39 -0400929
Thomas Petazzoniabcda1d2012-09-11 14:27:27 +0200930config PLAT_ORION_LEGACY
931 bool
932 select PLAT_ORION
933
Eric Miaobd5ce432009-01-20 12:06:01 +0800934config PLAT_PXA
935 bool
936
Russell Kingf4b8b312010-01-14 12:48:06 +0000937config PLAT_VERSATILE
938 bool
939
Alexandre Courbotd9a1bea2013-11-24 15:30:46 +0900940source "arch/arm/firmware/Kconfig"
941
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942source arch/arm/mm/Kconfig
943
Lennert Buytenhekafe4b252006-12-03 18:51:14 +0100944config IWMMXT
Sebastian Hesselbarthd93003e2014-04-24 22:58:30 +0100945 bool "Enable iWMMXt support"
946 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B
947 default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B
Lennert Buytenhekafe4b252006-12-03 18:51:14 +0100948 help
949 Enable support for iWMMXt context switching at run time if
950 running on a CPU that supports it.
951
eric miao52108642010-12-13 09:42:34 +0100952config MULTI_IRQ_HANDLER
953 bool
954 help
955 Allow each machine to specify it's own IRQ handler at run time.
956
Hyok S. Choi3b93e7b2006-06-22 11:48:56 +0100957if !MMU
958source "arch/arm/Kconfig-nommu"
959endif
960
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100961config PJ4B_ERRATA_4742
962 bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
963 depends on CPU_PJ4B && MACH_ARMADA_370
964 default y
965 help
966 When coming out of either a Wait for Interrupt (WFI) or a Wait for
967 Event (WFE) IDLE states, a specific timing sensitivity exists between
968 the retiring WFI/WFE instructions and the newly issued subsequent
969 instructions. This sensitivity can result in a CPU hang scenario.
970 Workaround:
971 The software must insert either a Data Synchronization Barrier (DSB)
972 or Data Memory Barrier (DMB) command immediately after the WFI/WFE
973 instruction
974
Will Deaconf0c4b8d2012-04-20 17:20:08 +0100975config ARM_ERRATA_326103
976 bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
977 depends on CPU_V6
978 help
979 Executing a SWP instruction to read-only memory does not set bit 11
980 of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
981 treat the access as a read, preventing a COW from occurring and
982 causing the faulting task to livelock.
983
Catalin Marinas9cba3cc2009-04-30 17:06:03 +0100984config ARM_ERRATA_411920
985 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
Russell Kinge399b1a2011-01-17 15:08:32 +0000986 depends on CPU_V6 || CPU_V6K
Catalin Marinas9cba3cc2009-04-30 17:06:03 +0100987 help
988 Invalidation of the Instruction Cache operation can
989 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
990 It does not affect the MPCore. This option enables the ARM Ltd.
991 recommended workaround.
992
Catalin Marinas7ce236f2009-04-30 17:06:09 +0100993config ARM_ERRATA_430973
994 bool "ARM errata: Stale prediction on replaced interworking branch"
995 depends on CPU_V7
996 help
997 This option enables the workaround for the 430973 Cortex-A8
Russell King79403cd2015-04-13 16:14:37 +0100998 r1p* erratum. If a code sequence containing an ARM/Thumb
Catalin Marinas7ce236f2009-04-30 17:06:09 +0100999 interworking branch is replaced with another code sequence at the
1000 same virtual address, whether due to self-modifying code or virtual
1001 to physical address re-mapping, Cortex-A8 does not recover from the
1002 stale interworking branch prediction. This results in Cortex-A8
1003 executing the new code sequence in the incorrect ARM or Thumb state.
1004 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1005 and also flushes the branch target cache at every context switch.
1006 Note that setting specific bits in the ACTLR register may not be
1007 available in non-secure mode.
1008
Catalin Marinas855c5512009-04-30 17:06:15 +01001009config ARM_ERRATA_458693
1010 bool "ARM errata: Processor deadlock when a false hazard is created"
1011 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001012 depends on !ARCH_MULTIPLATFORM
Catalin Marinas855c5512009-04-30 17:06:15 +01001013 help
1014 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1015 erratum. For very specific sequences of memory operations, it is
1016 possible for a hazard condition intended for a cache line to instead
1017 be incorrectly associated with a different cache line. This false
1018 hazard might then cause a processor deadlock. The workaround enables
1019 the L1 caching of the NEON accesses and disables the PLD instruction
1020 in the ACTLR register. Note that setting specific bits in the ACTLR
1021 register may not be available in non-secure mode.
1022
Catalin Marinas0516e462009-04-30 17:06:20 +01001023config ARM_ERRATA_460075
1024 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1025 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001026 depends on !ARCH_MULTIPLATFORM
Catalin Marinas0516e462009-04-30 17:06:20 +01001027 help
1028 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1029 erratum. Any asynchronous access to the L2 cache may encounter a
1030 situation in which recent store transactions to the L2 cache are lost
1031 and overwritten with stale memory contents from external memory. The
1032 workaround disables the write-allocate mode for the L2 cache via the
1033 ACTLR register. Note that setting specific bits in the ACTLR register
1034 may not be available in non-secure mode.
1035
Will Deacon9f050272010-09-14 09:51:43 +01001036config ARM_ERRATA_742230
1037 bool "ARM errata: DMB operation may be faulty"
1038 depends on CPU_V7 && SMP
Rob Herring62e4d352012-12-21 22:42:40 +01001039 depends on !ARCH_MULTIPLATFORM
Will Deacon9f050272010-09-14 09:51:43 +01001040 help
1041 This option enables the workaround for the 742230 Cortex-A9
1042 (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1043 between two write operations may not ensure the correct visibility
1044 ordering of the two writes. This workaround sets a specific bit in
1045 the diagnostic register of the Cortex-A9 which causes the DMB
1046 instruction to behave as a DSB, ensuring the correct behaviour of
1047 the two writes.
1048
Will Deacona672e992010-09-14 09:53:02 +01001049config ARM_ERRATA_742231
1050 bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1051 depends on CPU_V7 && SMP
Rob Herring62e4d352012-12-21 22:42:40 +01001052 depends on !ARCH_MULTIPLATFORM
Will Deacona672e992010-09-14 09:53:02 +01001053 help
1054 This option enables the workaround for the 742231 Cortex-A9
1055 (r2p0..r2p2) erratum. Under certain conditions, specific to the
1056 Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1057 accessing some data located in the same cache line, may get corrupted
1058 data due to bad handling of the address hazard when the line gets
1059 replaced from one of the CPUs at the same time as another CPU is
1060 accessing it. This workaround sets specific bits in the diagnostic
1061 register of the Cortex-A9 which reduces the linefill issuing
1062 capabilities of the processor.
1063
Jon Medhurst69155792013-06-07 10:35:35 +01001064config ARM_ERRATA_643719
1065 bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
1066 depends on CPU_V7 && SMP
Russell Kinge5a5de42015-04-02 23:58:55 +01001067 default y
Jon Medhurst69155792013-06-07 10:35:35 +01001068 help
1069 This option enables the workaround for the 643719 Cortex-A9 (prior to
1070 r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
1071 register returns zero when it should return one. The workaround
1072 corrects this value, ensuring cache maintenance operations which use
1073 it behave as intended and avoiding data corruption.
1074
Will Deaconcdf357f2010-08-05 11:20:51 +01001075config ARM_ERRATA_720789
1076 bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
Dave Martine66dc742011-12-08 13:37:46 +01001077 depends on CPU_V7
Will Deaconcdf357f2010-08-05 11:20:51 +01001078 help
1079 This option enables the workaround for the 720789 Cortex-A9 (prior to
1080 r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1081 broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1082 As a consequence of this erratum, some TLB entries which should be
1083 invalidated are not, resulting in an incoherency in the system page
1084 tables. The workaround changes the TLB flushing routines to invalidate
1085 entries regardless of the ASID.
Will Deacon475d92f2010-09-28 14:02:02 +01001086
1087config ARM_ERRATA_743622
1088 bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1089 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001090 depends on !ARCH_MULTIPLATFORM
Will Deacon475d92f2010-09-28 14:02:02 +01001091 help
1092 This option enables the workaround for the 743622 Cortex-A9
Will Deaconefbc74a2012-02-24 12:12:38 +01001093 (r2p*) erratum. Under very rare conditions, a faulty
Will Deacon475d92f2010-09-28 14:02:02 +01001094 optimisation in the Cortex-A9 Store Buffer may lead to data
1095 corruption. This workaround sets a specific bit in the diagnostic
1096 register of the Cortex-A9 which disables the Store Buffer
1097 optimisation, preventing the defect from occurring. This has no
1098 visible impact on the overall performance or power consumption of the
1099 processor.
1100
Will Deacon9a27c272011-02-18 16:36:35 +01001101config ARM_ERRATA_751472
1102 bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
Dave Martinba90c512011-12-08 13:41:06 +01001103 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001104 depends on !ARCH_MULTIPLATFORM
Will Deacon9a27c272011-02-18 16:36:35 +01001105 help
1106 This option enables the workaround for the 751472 Cortex-A9 (prior
1107 to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1108 completion of a following broadcasted operation if the second
1109 operation is received by a CPU before the ICIALLUIS has completed,
1110 potentially leading to corrupted entries in the cache or TLB.
1111
Will Deaconfcbdc5fe2011-02-28 18:15:16 +01001112config ARM_ERRATA_754322
1113 bool "ARM errata: possible faulty MMU translations following an ASID switch"
1114 depends on CPU_V7
1115 help
1116 This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1117 r3p*) erratum. A speculative memory access may cause a page table walk
1118 which starts prior to an ASID switch but completes afterwards. This
1119 can populate the micro-TLB with a stale entry which may be hit with
1120 the new ASID. This workaround places two dsb instructions in the mm
1121 switching code so that no page table walks can cross the ASID switch.
1122
Will Deacon5dab26af2011-03-04 12:38:54 +01001123config ARM_ERRATA_754327
1124 bool "ARM errata: no automatic Store Buffer drain"
1125 depends on CPU_V7 && SMP
1126 help
1127 This option enables the workaround for the 754327 Cortex-A9 (prior to
1128 r2p0) erratum. The Store Buffer does not have any automatic draining
1129 mechanism and therefore a livelock may occur if an external agent
1130 continuously polls a memory location waiting to observe an update.
1131 This workaround defines cpu_relax() as smp_mb(), preventing correctly
1132 written polling loops from denying visibility of updates to memory.
1133
Catalin Marinas145e10e2011-08-15 11:04:41 +01001134config ARM_ERRATA_364296
1135 bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
Fabio Estevamfd832472013-07-09 18:34:01 +01001136 depends on CPU_V6
Catalin Marinas145e10e2011-08-15 11:04:41 +01001137 help
1138 This options enables the workaround for the 364296 ARM1136
1139 r0p2 erratum (possible cache data corruption with
1140 hit-under-miss enabled). It sets the undocumented bit 31 in
1141 the auxiliary control register and the FI bit in the control
1142 register, thus disabling hit-under-miss without putting the
1143 processor into full low interrupt latency mode. ARM11MPCore
1144 is not affected.
1145
Will Deaconf630c1b2011-09-15 11:45:15 +01001146config ARM_ERRATA_764369
1147 bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1148 depends on CPU_V7 && SMP
1149 help
1150 This option enables the workaround for erratum 764369
1151 affecting Cortex-A9 MPCore with two or more processors (all
1152 current revisions). Under certain timing circumstances, a data
1153 cache line maintenance operation by MVA targeting an Inner
1154 Shareable memory region may fail to proceed up to either the
1155 Point of Coherency or to the Point of Unification of the
1156 system. This workaround adds a DSB instruction before the
1157 relevant cache maintenance functions and sets a specific bit
1158 in the diagnostic control register of the SCU.
1159
Simon Horman7253b852012-09-28 02:12:45 +01001160config ARM_ERRATA_775420
1161 bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
1162 depends on CPU_V7
1163 help
1164 This option enables the workaround for the 775420 Cortex-A9 (r2p2,
1165 r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
1166 operation aborts with MMU exception, it might cause the processor
1167 to deadlock. This workaround puts DSB before executing ISB if
1168 an abort may occur on cache maintenance.
1169
Catalin Marinas93dc6882013-03-26 23:35:04 +01001170config ARM_ERRATA_798181
1171 bool "ARM errata: TLBI/DSB failure on Cortex-A15"
1172 depends on CPU_V7 && SMP
1173 help
1174 On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
1175 adequately shooting down all use of the old entries. This
1176 option enables the Linux kernel workaround for this erratum
1177 which sends an IPI to the CPUs that are running the same ASID
1178 as the one being invalidated.
1179
Will Deacon84b65042013-08-20 17:29:55 +01001180config ARM_ERRATA_773022
1181 bool "ARM errata: incorrect instructions may be executed from loop buffer"
1182 depends on CPU_V7
1183 help
1184 This option enables the workaround for the 773022 Cortex-A15
1185 (up to r0p4) erratum. In certain rare sequences of code, the
1186 loop buffer may deliver incorrect instructions. This
1187 workaround disables the loop buffer to avoid the erratum.
1188
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189endmenu
1190
1191source "arch/arm/common/Kconfig"
1192
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193menu "Bus support"
1194
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195config ISA
1196 bool
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 help
1198 Find out whether you have ISA slots on your motherboard. ISA is the
1199 name of a bus system, i.e. the way the CPU talks to the other stuff
1200 inside your box. Other bus systems are PCI, EISA, MicroChannel
1201 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1202 newer boards don't support it. If you have ISA, say Y, otherwise N.
1203
Russell King065909b2006-01-04 15:44:16 +00001204# Select ISA DMA controller support
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205config ISA_DMA
1206 bool
Russell King065909b2006-01-04 15:44:16 +00001207 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208
Russell King065909b2006-01-04 15:44:16 +00001209# Select ISA DMA interface
Al Viro5cae8412005-05-04 05:39:22 +01001210config ISA_DMA_API
1211 bool
Al Viro5cae8412005-05-04 05:39:22 +01001212
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213config PCI
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +01001214 bool "PCI support" if MIGHT_HAVE_PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 help
1216 Find out whether you have a PCI motherboard. PCI is the name of a
1217 bus system, i.e. the way the CPU talks to the other stuff inside
1218 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1219 VESA. If you have PCI, say Y, otherwise N.
1220
Anton Vorontsov52882172010-04-19 13:20:49 +01001221config PCI_DOMAINS
1222 bool
1223 depends on PCI
1224
Lorenzo Pieralisi8c7d14742014-11-21 11:29:26 +00001225config PCI_DOMAINS_GENERIC
1226 def_bool PCI_DOMAINS
1227
Marcelo Roberto Jimenezb080ac82010-12-16 21:34:51 +01001228config PCI_NANOENGINE
1229 bool "BSE nanoEngine PCI support"
1230 depends on SA1100_NANOENGINE
1231 help
1232 Enable PCI on the BSE nanoEngine board.
1233
Matthew Wilcox36e23592007-07-10 10:54:40 -06001234config PCI_SYSCALL
1235 def_bool PCI
1236
Mike Rapoporta0113a92007-11-25 08:55:34 +01001237config PCI_HOST_ITE8152
1238 bool
1239 depends on PCI && MACH_ARMCORE
1240 default y
1241 select DMABOUNCE
1242
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243source "drivers/pci/Kconfig"
1244
1245source "drivers/pcmcia/Kconfig"
1246
1247endmenu
1248
1249menu "Kernel Features"
1250
Dave Martin3b556582011-12-07 15:38:04 +00001251config HAVE_SMP
1252 bool
1253 help
1254 This option should be selected by machines which have an SMP-
1255 capable CPU.
1256
1257 The only effect of this option is to make the SMP-related
1258 options available to the user for configuration.
1259
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260config SMP
Russell Kingbb2d8132011-05-12 09:52:02 +01001261 bool "Symmetric Multi-Processing"
Russell Kingfbb4dda2011-01-17 18:01:58 +00001262 depends on CPU_V6K || CPU_V7
Russell Kingbc282482009-05-17 18:58:34 +01001263 depends on GENERIC_CLOCKEVENTS
Dave Martin3b556582011-12-07 15:38:04 +00001264 depends on HAVE_SMP
Jonathan Austin801bb212013-02-22 18:56:04 +00001265 depends on MMU || ARM_MPU
Arnd Bergmann03617482015-05-26 15:36:58 +01001266 select IRQ_WORK
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267 help
1268 This enables support for systems with more than one CPU. If you have
Robert Graffham4a474152014-01-23 15:55:29 -08001269 a system with only one CPU, say N. If you have a system with more
1270 than one CPU, say Y.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271
Robert Graffham4a474152014-01-23 15:55:29 -08001272 If you say N here, the kernel will run on uni- and multiprocessor
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273 machines, but will use only one CPU of a multiprocessor machine. If
Robert Graffham4a474152014-01-23 15:55:29 -08001274 you say Y here, the kernel will run on many, but not all,
1275 uniprocessor machines. On a uniprocessor machine, the kernel
1276 will run faster if you say N here.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277
Paul Bolle395cf962011-08-15 02:02:26 +02001278 See also <file:Documentation/x86/i386/IO-APIC.txt>,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
Justin P. Mattock50a23e62010-10-16 10:36:23 -07001280 <http://tldp.org/HOWTO/SMP-HOWTO.html>.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281
1282 If you don't know what to do here, say N.
1283
Russell Kingf00ec482010-09-04 10:47:48 +01001284config SMP_ON_UP
Russell King5744ff42015-02-13 11:04:21 +00001285 bool "Allow booting SMP kernel on uniprocessor systems"
Jonathan Austin801bb212013-02-22 18:56:04 +00001286 depends on SMP && !XIP_KERNEL && MMU
Russell Kingf00ec482010-09-04 10:47:48 +01001287 default y
1288 help
1289 SMP kernels contain instructions which fail on non-SMP processors.
1290 Enabling this option allows the kernel to modify itself to make
1291 these instructions safe. Disabling it allows about 1K of space
1292 savings.
1293
1294 If you don't know what to do here, say Y.
1295
Vincent Guittotc9018aa2011-08-08 13:21:59 +01001296config ARM_CPU_TOPOLOGY
1297 bool "Support cpu topology definition"
1298 depends on SMP && CPU_V7
1299 default y
1300 help
1301 Support ARM cpu topology definition. The MPIDR register defines
1302 affinity between processors which is then used to describe the cpu
1303 topology of an ARM System.
1304
1305config SCHED_MC
1306 bool "Multi-core scheduler support"
1307 depends on ARM_CPU_TOPOLOGY
1308 help
1309 Multi-core scheduler support improves the CPU scheduler's decision
1310 making when dealing with multi-core CPU chips at a cost of slightly
1311 increased overhead in some places. If unsure say N here.
1312
1313config SCHED_SMT
1314 bool "SMT scheduler support"
1315 depends on ARM_CPU_TOPOLOGY
1316 help
1317 Improves the CPU scheduler's decision making when dealing with
1318 MultiThreading at a cost of slightly increased overhead in some
1319 places. If unsure say N here.
1320
Russell Kinga8cbcd92009-05-16 11:51:14 +01001321config HAVE_ARM_SCU
1322 bool
Russell Kinga8cbcd92009-05-16 11:51:14 +01001323 help
1324 This option enables support for the ARM system coherency unit
1325
Mark Rutland8a4da6e2012-11-12 14:33:44 +00001326config HAVE_ARM_ARCH_TIMER
Marc Zyngier022c03a2012-01-11 17:25:17 +00001327 bool "Architected timer support"
1328 depends on CPU_V7
Mark Rutland8a4da6e2012-11-12 14:33:44 +00001329 select ARM_ARCH_TIMER
Will Deacon0c4034622013-11-19 15:46:17 +01001330 select GENERIC_CLOCKEVENTS
Marc Zyngier022c03a2012-01-11 17:25:17 +00001331 help
1332 This option enables support for the ARM architected timer
1333
Russell Kingf32f4ce2009-05-16 12:14:21 +01001334config HAVE_ARM_TWD
1335 bool
Rob Herringda4a6862013-02-06 21:17:47 -06001336 select CLKSRC_OF if OF
Russell Kingf32f4ce2009-05-16 12:14:21 +01001337 help
1338 This options enables support for the ARM timer and watchdog unit
1339
Nicolas Pitree8db2882012-04-12 02:45:22 -04001340config MCPM
1341 bool "Multi-Cluster Power Management"
1342 depends on CPU_V7 && SMP
1343 help
1344 This option provides the common power management infrastructure
1345 for (multi-)cluster based systems, such as big.LITTLE based
1346 systems.
1347
Haojian Zhuangebf4a5c2014-04-15 14:52:00 +08001348config MCPM_QUAD_CLUSTER
1349 bool
1350 depends on MCPM
1351 help
1352 To avoid wasting resources unnecessarily, MCPM only supports up
1353 to 2 clusters by default.
1354 Platforms with 3 or 4 clusters that use MCPM must select this
1355 option to allow the additional clusters to be managed.
1356
Nicolas Pitre1c33be52012-04-12 02:56:10 -04001357config BIG_LITTLE
1358 bool "big.LITTLE support (Experimental)"
1359 depends on CPU_V7 && SMP
1360 select MCPM
1361 help
1362 This option enables support selections for the big.LITTLE
1363 system architecture.
1364
1365config BL_SWITCHER
1366 bool "big.LITTLE switcher support"
Arnd Bergmann6c044fe2015-11-19 15:49:23 +01001367 depends on BIG_LITTLE && MCPM && HOTPLUG_CPU && ARM_GIC
Russell King51aaf812014-04-22 22:26:27 +01001368 select CPU_PM
Nicolas Pitre1c33be52012-04-12 02:56:10 -04001369 help
1370 The big.LITTLE "switcher" provides the core functionality to
1371 transparently handle transition between a cluster of A15's
1372 and a cluster of A7's in a big.LITTLE system.
1373
Nicolas Pitreb22537c2012-04-12 03:04:28 -04001374config BL_SWITCHER_DUMMY_IF
1375 tristate "Simple big.LITTLE switcher user interface"
1376 depends on BL_SWITCHER && DEBUG_KERNEL
1377 help
1378 This is a simple and dummy char dev interface to control
1379 the big.LITTLE switcher core code. It is meant for
1380 debugging purposes only.
1381
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001382choice
1383 prompt "Memory split"
Russell King006fa252014-02-26 19:40:46 +00001384 depends on MMU
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001385 default VMSPLIT_3G
1386 help
1387 Select the desired split between kernel and user memory.
1388
1389 If you are not absolutely sure what you are doing, leave this
1390 option alone!
1391
1392 config VMSPLIT_3G
1393 bool "3G/1G user/kernel split"
Nicolas Pitre63ce4462015-09-13 03:30:11 +01001394 config VMSPLIT_3G_OPT
1395 bool "3G/1G user/kernel split (for full 1G low memory)"
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001396 config VMSPLIT_2G
1397 bool "2G/2G user/kernel split"
1398 config VMSPLIT_1G
1399 bool "1G/3G user/kernel split"
1400endchoice
1401
1402config PAGE_OFFSET
1403 hex
Russell King006fa252014-02-26 19:40:46 +00001404 default PHYS_OFFSET if !MMU
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001405 default 0x40000000 if VMSPLIT_1G
1406 default 0x80000000 if VMSPLIT_2G
Nicolas Pitre63ce4462015-09-13 03:30:11 +01001407 default 0xB0000000 if VMSPLIT_3G_OPT
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001408 default 0xC0000000
1409
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410config NR_CPUS
1411 int "Maximum number of CPUs (2-32)"
1412 range 2 32
1413 depends on SMP
1414 default "4"
1415
Russell Kinga054a812005-11-02 22:24:33 +00001416config HOTPLUG_CPU
Russell King00b7ded2012-10-22 22:54:30 +01001417 bool "Support for hot-pluggable CPUs"
Stephen Rothwell40b31362013-05-21 13:49:35 +10001418 depends on SMP
Russell Kinga054a812005-11-02 22:24:33 +00001419 help
1420 Say Y here to experiment with turning CPUs off and on. CPUs
1421 can be controlled through /sys/devices/system/cpu.
1422
Will Deacon2bdd4242012-12-12 19:20:52 +00001423config ARM_PSCI
1424 bool "Support for the ARM Power State Coordination Interface (PSCI)"
Jens Wiklandere6796602016-01-04 15:46:47 +01001425 depends on HAVE_ARM_SMCCC
Mark Rutlandbe120392015-07-31 15:46:19 +01001426 select ARM_PSCI_FW
Will Deacon2bdd4242012-12-12 19:20:52 +00001427 help
1428 Say Y here if you want Linux to communicate with system firmware
1429 implementing the PSCI specification for CPU-centric power
1430 management operations described in ARM document number ARM DEN
1431 0022A ("Power State Coordination Interface System Software on
1432 ARM processors").
1433
Maxime Ripard2a6ad872013-02-03 12:24:48 +01001434# The GPIO number here must be sorted by descending number. In case of
1435# a multiplatform kernel, we just want the highest value required by the
1436# selected platforms.
Peter De Schrijver (NVIDIA)44986ab2011-12-21 10:48:45 +01001437config ARCH_NR_GPIO
1438 int
Gregory Fongb35d2e52015-05-28 19:14:10 -07001439 default 1024 if ARCH_BRCMSTB || ARCH_SHMOBILE || ARCH_TEGRA || \
1440 ARCH_ZYNQ
Tomasz Figaaa425872014-07-03 13:17:12 +02001441 default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || \
1442 SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210
Boris BREZILLONeb171a92014-04-10 15:52:46 +02001443 default 416 if ARCH_SUNXI
Olof Johansson06b851e2013-04-02 18:33:58 -07001444 default 392 if ARCH_U8500
Tony Prisk01bb9142013-03-09 18:22:30 +13001445 default 352 if ARCH_VT8500
Heiko Stuebner7b5da4c2014-05-26 00:13:51 +02001446 default 288 if ARCH_ROCKCHIP
Maxime Ripard2a6ad872013-02-03 12:24:48 +01001447 default 264 if MACH_H4700
Peter De Schrijver (NVIDIA)44986ab2011-12-21 10:48:45 +01001448 default 0
1449 help
1450 Maximum number of GPIOs in the system.
1451
1452 If unsure, leave the default value.
1453
Uwe Kleine-Königd45a3982009-08-13 20:38:17 +02001454source kernel/Kconfig.preempt
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455
Russell Kingc9218b12013-04-27 23:31:10 +01001456config HZ_FIXED
Russell Kingf8065812006-03-02 22:41:59 +00001457 int
Kukjin Kim070b8b42014-07-02 07:50:15 +09001458 default 200 if ARCH_EBSA110 || ARCH_S3C24XX || \
Kukjin Kima73ddc62011-05-11 16:27:51 +09001459 ARCH_S5PV210 || ARCH_EXYNOS4
Alexandre Belloni1164f672015-03-13 22:57:24 +01001460 default 128 if SOC_AT91RM9200
Russell King47d84682013-09-10 23:47:55 +01001461 default 0
Russell Kingc9218b12013-04-27 23:31:10 +01001462
1463choice
Russell King47d84682013-09-10 23:47:55 +01001464 depends on HZ_FIXED = 0
Russell Kingc9218b12013-04-27 23:31:10 +01001465 prompt "Timer frequency"
1466
1467config HZ_100
1468 bool "100 Hz"
1469
1470config HZ_200
1471 bool "200 Hz"
1472
1473config HZ_250
1474 bool "250 Hz"
1475
1476config HZ_300
1477 bool "300 Hz"
1478
1479config HZ_500
1480 bool "500 Hz"
1481
1482config HZ_1000
1483 bool "1000 Hz"
1484
1485endchoice
1486
1487config HZ
1488 int
Russell King47d84682013-09-10 23:47:55 +01001489 default HZ_FIXED if HZ_FIXED != 0
Russell Kingc9218b12013-04-27 23:31:10 +01001490 default 100 if HZ_100
1491 default 200 if HZ_200
1492 default 250 if HZ_250
1493 default 300 if HZ_300
1494 default 500 if HZ_500
1495 default 1000
1496
1497config SCHED_HRTICK
1498 def_bool HIGH_RES_TIMERS
Russell Kingf8065812006-03-02 22:41:59 +00001499
Catalin Marinas16c79652009-07-24 12:33:02 +01001500config THUMB2_KERNEL
Uwe Kleine-Königbc7dea02011-12-09 20:52:10 +01001501 bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
Uwe Kleine-König4477ca42013-03-21 21:02:37 +01001502 depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
Uwe Kleine-Königbc7dea02011-12-09 20:52:10 +01001503 default y if CPU_THUMBONLY
Catalin Marinas16c79652009-07-24 12:33:02 +01001504 select AEABI
1505 select ARM_ASM_UNIFIED
Arnd Bergmann89bace62011-06-10 14:12:21 +00001506 select ARM_UNWIND
Catalin Marinas16c79652009-07-24 12:33:02 +01001507 help
1508 By enabling this option, the kernel will be compiled in
1509 Thumb-2 mode. A compiler/assembler that understand the unified
1510 ARM-Thumb syntax is needed.
1511
1512 If unsure, say N.
1513
Dave Martin6f685c52011-03-03 11:41:12 +01001514config THUMB2_AVOID_R_ARM_THM_JUMP11
1515 bool "Work around buggy Thumb-2 short branch relocations in gas"
1516 depends on THUMB2_KERNEL && MODULES
1517 default y
1518 help
1519 Various binutils versions can resolve Thumb-2 branches to
1520 locally-defined, preemptible global symbols as short-range "b.n"
1521 branch instructions.
1522
1523 This is a problem, because there's no guarantee the final
1524 destination of the symbol, or any candidate locations for a
1525 trampoline, are within range of the branch. For this reason, the
1526 kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1527 relocation in modules at all, and it makes little sense to add
1528 support.
1529
1530 The symptom is that the kernel fails with an "unsupported
1531 relocation" error when loading some modules.
1532
1533 Until fixed tools are available, passing
1534 -fno-optimize-sibling-calls to gcc should prevent gcc generating
1535 code which hits this problem, at the cost of a bit of extra runtime
1536 stack usage in some cases.
1537
1538 The problem is described in more detail at:
1539 https://bugs.launchpad.net/binutils-linaro/+bug/725126
1540
1541 Only Thumb-2 kernels are affected.
1542
1543 Unless you are sure your tools don't have this problem, say Y.
1544
Catalin Marinas0becb082009-07-24 12:32:53 +01001545config ARM_ASM_UNIFIED
1546 bool
1547
Nicolas Pitre42f25bd2015-12-12 02:49:21 +01001548config ARM_PATCH_IDIV
1549 bool "Runtime patch udiv/sdiv instructions into __aeabi_{u}idiv()"
1550 depends on CPU_32v7 && !XIP_KERNEL
1551 default y
1552 help
1553 The ARM compiler inserts calls to __aeabi_idiv() and
1554 __aeabi_uidiv() when it needs to perform division on signed
1555 and unsigned integers. Some v7 CPUs have support for the sdiv
1556 and udiv instructions that can be used to implement those
1557 functions.
1558
1559 Enabling this option allows the kernel to modify itself to
1560 replace the first two instructions of these library functions
1561 with the sdiv or udiv plus "bx lr" instructions when the CPU
1562 it is running on supports them. Typically this will be faster
1563 and less power intensive than running the original library
1564 code to do integer division.
1565
Nicolas Pitre704bdda02006-01-14 16:33:50 +00001566config AEABI
1567 bool "Use the ARM EABI to compile the kernel"
1568 help
1569 This option allows for the kernel to be compiled using the latest
1570 ARM ABI (aka EABI). This is only useful if you are using a user
1571 space environment that is also compiled with EABI.
1572
1573 Since there are major incompatibilities between the legacy ABI and
1574 EABI, especially with regard to structure member alignment, this
1575 option also changes the kernel syscall calling convention to
1576 disambiguate both ABIs and allow for backward compatibility support
1577 (selected with CONFIG_OABI_COMPAT).
1578
1579 To use this you need GCC version 4.0.0 or later.
1580
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001581config OABI_COMPAT
Russell Kinga73a3ff2006-02-08 21:09:55 +00001582 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
Kees Cookd6f94fa2013-01-16 18:53:14 -08001583 depends on AEABI && !THUMB2_KERNEL
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001584 help
1585 This option preserves the old syscall interface along with the
1586 new (ARM EABI) one. It also provides a compatibility layer to
1587 intercept syscalls that have structure arguments which layout
1588 in memory differs between the legacy ABI and the new ARM EABI
1589 (only for non "thumb" binaries). This option adds a tiny
1590 overhead to all syscalls and produces a slightly larger kernel.
Kees Cook91702172013-11-09 00:51:56 +01001591
1592 The seccomp filter system will not be available when this is
1593 selected, since there is no way yet to sensibly distinguish
1594 between calling conventions during filtering.
1595
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001596 If you know you'll be using only pure EABI user space then you
1597 can say N here. If this option is not selected and you attempt
1598 to execute a legacy ABI binary then the result will be
1599 UNPREDICTABLE (in fact it can be predicted that it won't work
Kees Cookb02f8462013-11-09 00:31:11 +01001600 at all). If in doubt say N.
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001601
Mel Gormaneb335752009-05-13 17:34:48 +01001602config ARCH_HAS_HOLES_MEMORYMODEL
Mel Gormane80d6a22008-08-14 11:10:14 +01001603 bool
Mel Gormane80d6a22008-08-14 11:10:14 +01001604
Russell King05944d72006-11-30 20:43:51 +00001605config ARCH_SPARSEMEM_ENABLE
1606 bool
1607
Russell King07a2f732008-10-01 21:39:58 +01001608config ARCH_SPARSEMEM_DEFAULT
1609 def_bool ARCH_SPARSEMEM_ENABLE
1610
Russell King05944d72006-11-30 20:43:51 +00001611config ARCH_SELECT_MEMORY_MODEL
Russell Kingbe370302010-05-07 17:40:33 +01001612 def_bool ARCH_SPARSEMEM_ENABLE
Yasunori Gotoc80d79d2006-04-10 22:53:53 -07001613
Will Deacon7b7bf492011-05-19 13:21:14 +01001614config HAVE_ARCH_PFN_VALID
1615 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1616
Steve Capperb8cd51a2014-10-09 15:29:20 -07001617config HAVE_GENERIC_RCU_GUP
1618 def_bool y
1619 depends on ARM_LPAE
1620
Nicolas Pitre053a96c2008-09-19 00:36:12 -04001621config HIGHMEM
Russell Kinge8db89a2011-05-12 09:53:05 +01001622 bool "High Memory Support"
1623 depends on MMU
Nicolas Pitre053a96c2008-09-19 00:36:12 -04001624 help
1625 The address space of ARM processors is only 4 Gigabytes large
1626 and it has to accommodate user address space, kernel address
1627 space as well as some memory mapped IO. That means that, if you
1628 have a large amount of physical memory and/or IO, not all of the
1629 memory can be "permanently mapped" by the kernel. The physical
1630 memory that is not permanently mapped is called "high memory".
1631
1632 Depending on the selected kernel/user memory split, minimum
1633 vmalloc space and actual amount of RAM, you may not need this
1634 option which should result in a slightly faster kernel.
1635
1636 If unsure, say n.
1637
Russell King65cec8e2009-08-17 20:02:06 +01001638config HIGHPTE
Russell King9a431bd2015-06-25 10:44:08 +01001639 bool "Allocate 2nd-level pagetables from highmem" if EXPERT
Russell King65cec8e2009-08-17 20:02:06 +01001640 depends on HIGHMEM
Russell King9a431bd2015-06-25 10:44:08 +01001641 default y
Russell Kingb4d103d2015-06-25 10:49:45 +01001642 help
1643 The VM uses one page of physical memory for each page table.
1644 For systems with a lot of processes, this can use a lot of
1645 precious low memory, eventually leading to low memory being
1646 consumed by page tables. Setting this option will allow
1647 user-space 2nd level page tables to reside in high memory.
Russell King65cec8e2009-08-17 20:02:06 +01001648
Russell Kinga5e090a2015-08-19 20:40:41 +01001649config CPU_SW_DOMAIN_PAN
1650 bool "Enable use of CPU domains to implement privileged no-access"
1651 depends on MMU && !ARM_LPAE
Jamie Iles1b8873a2010-02-02 20:25:44 +01001652 default y
1653 help
Russell Kinga5e090a2015-08-19 20:40:41 +01001654 Increase kernel security by ensuring that normal kernel accesses
1655 are unable to access userspace addresses. This can help prevent
1656 use-after-free bugs becoming an exploitable privilege escalation
1657 by ensuring that magic values (such as LIST_POISON) will always
1658 fault when dereferenced.
1659
1660 CPUs with low-vector mappings use a best-efforts implementation.
1661 Their lower 1MB needs to remain accessible for the vectors, but
1662 the remainder of userspace will become appropriately inaccessible.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001663
1664config HW_PERF_EVENTS
Mark Rutlandfa8ad782015-07-06 12:23:53 +01001665 def_bool y
1666 depends on ARM_PMU
Jamie Iles1b8873a2010-02-02 20:25:44 +01001667
Catalin Marinas1355e2a2012-07-25 14:32:38 +01001668config SYS_SUPPORTS_HUGETLBFS
1669 def_bool y
1670 depends on ARM_LPAE
1671
Catalin Marinas8d962502012-07-25 14:39:26 +01001672config HAVE_ARCH_TRANSPARENT_HUGEPAGE
1673 def_bool y
1674 depends on ARM_LPAE
1675
Steven Capper4bfab202013-07-26 14:58:22 +01001676config ARCH_WANT_GENERAL_HUGETLB
1677 def_bool y
1678
Ard Biesheuvel7d485f62014-11-24 16:54:35 +01001679config ARM_MODULE_PLTS
1680 bool "Use PLTs to allow module memory to spill over into vmalloc area"
1681 depends on MODULES
1682 help
1683 Allocate PLTs when loading modules so that jumps and calls whose
1684 targets are too far away for their relative offsets to be encoded
1685 in the instructions themselves can be bounced via veneers in the
1686 module's PLT. This allows modules to be allocated in the generic
1687 vmalloc area after the dedicated module memory area has been
1688 exhausted. The modules will use slightly more memory, but after
1689 rounding up to page size, the actual memory footprint is usually
1690 the same.
1691
1692 Say y if you are getting out of memory errors while loading modules
1693
Linus Torvalds1da177e2005-04-16 15:20:36 -07001694source "mm/Kconfig"
1695
Magnus Dammc1b2d972010-07-05 10:00:11 +01001696config FORCE_MAX_ZONEORDER
Ulrich Hecht36d6c922015-08-14 15:51:06 +02001697 int "Maximum zone order"
Yegor Yefremov898f08e2012-10-08 14:37:53 -07001698 default "12" if SOC_AM33XX
Uwe Kleine-König6d85e2b2011-11-17 14:36:23 +01001699 default "9" if SA1111 || ARCH_EFM32
Magnus Dammc1b2d972010-07-05 10:00:11 +01001700 default "11"
1701 help
1702 The kernel memory allocator divides physically contiguous memory
1703 blocks into "zones", where each zone is a power of two number of
1704 pages. This option selects the largest power of two that the kernel
1705 keeps in the memory allocator. If you need to allocate very large
1706 blocks of physically contiguous memory, then you may need to
1707 increase this value.
1708
1709 This config option is actually maximum order plus one. For example,
1710 a value of 11 means that the largest free memory block is 2^10 pages.
1711
Linus Torvalds1da177e2005-04-16 15:20:36 -07001712config ALIGNMENT_TRAP
1713 bool
Hyok S. Choif12d0d72006-09-26 17:36:37 +09001714 depends on CPU_CP15_MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 default y if !ARCH_EBSA110
Russell Kinge119bff2010-01-10 17:23:29 +00001716 select HAVE_PROC_CPU if PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001717 help
Matt LaPlante84eb8d02006-10-03 22:53:09 +02001718 ARM processors cannot fetch/store information which is not
Linus Torvalds1da177e2005-04-16 15:20:36 -07001719 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1720 address divisible by 4. On 32-bit ARM processors, these non-aligned
1721 fetch/store instructions will be emulated in software if you say
1722 here, which has a severe performance impact. This is necessary for
1723 correct operation of some network protocols. With an IP-only
1724 configuration it is safe to say N, otherwise say Y.
1725
Lennert Buytenhek39ec58f2009-03-09 14:30:09 -04001726config UACCESS_WITH_MEMCPY
Linus Walleij38ef2ad2012-09-10 16:36:37 +01001727 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
1728 depends on MMU
Lennert Buytenhek39ec58f2009-03-09 14:30:09 -04001729 default y if CPU_FEROCEON
1730 help
1731 Implement faster copy_to_user and clear_user methods for CPU
1732 cores where a 8-word STM instruction give significantly higher
1733 memory write throughput than a sequence of individual 32bit stores.
1734
1735 A possible side effect is a slight increase in scheduling latency
1736 between threads sharing the same address space if they invoke
1737 such copy operations with large buffers.
1738
1739 However, if the CPU data cache is using a write-allocate mode,
1740 this option is unlikely to provide any performance gain.
1741
Nicolas Pitre70c70d92010-08-26 15:08:35 -07001742config SECCOMP
1743 bool
1744 prompt "Enable seccomp to safely compute untrusted bytecode"
1745 ---help---
1746 This kernel feature is useful for number crunching applications
1747 that may need to compute untrusted bytecode during their
1748 execution. By using pipes or other transports made available to
1749 the process as file descriptors supporting the read/write
1750 syscalls, it's possible to isolate those applications in
1751 their own address space using seccomp. Once seccomp is
1752 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1753 and the task is only allowed to execute a few safe syscalls
1754 defined by each seccomp mode.
1755
Stefano Stabellini06e62952013-10-15 15:47:14 +00001756config SWIOTLB
1757 def_bool y
1758
1759config IOMMU_HELPER
1760 def_bool SWIOTLB
1761
Stefano Stabellini02c24332015-11-23 10:32:57 +00001762config PARAVIRT
1763 bool "Enable paravirtualization code"
1764 help
1765 This changes the kernel so it can modify itself when it is run
1766 under a hypervisor, potentially improving performance significantly
1767 over full virtualization.
1768
1769config PARAVIRT_TIME_ACCOUNTING
1770 bool "Paravirtual steal time accounting"
1771 select PARAVIRT
1772 default n
1773 help
1774 Select this option to enable fine granularity task steal time
1775 accounting. Time spent executing other tasks in parallel with
1776 the current vCPU is discounted from the vCPU power. To account for
1777 that, there can be a small performance impact.
1778
1779 If in doubt, say N here.
1780
Stefano Stabellinieff8d642012-09-17 14:58:17 +00001781config XEN_DOM0
1782 def_bool y
1783 depends on XEN
1784
1785config XEN
Julien Grallc2ba1f72014-09-17 14:07:06 -07001786 bool "Xen guest support on ARM"
Ian Campbell85323a92013-03-07 07:17:25 +00001787 depends on ARM && AEABI && OF
Arnd Bergmannf880b672012-10-09 10:33:52 +00001788 depends on CPU_V7 && !CPU_V6
Ian Campbell85323a92013-03-07 07:17:25 +00001789 depends on !GENERIC_ATOMIC64
Uwe Kleine-König7693dec2014-03-03 09:25:52 -05001790 depends on MMU
Russell King51aaf812014-04-22 22:26:27 +01001791 select ARCH_DMA_ADDR_T_64BIT
Stefano Stabellini17b7ab82013-04-24 18:47:18 +00001792 select ARM_PSCI
Stefano Stabellini83862cc2013-10-10 13:40:44 +00001793 select SWIOTLB_XEN
Stefano Stabellini02c24332015-11-23 10:32:57 +00001794 select PARAVIRT
Stefano Stabellinieff8d642012-09-17 14:58:17 +00001795 help
1796 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
1797
Linus Torvalds1da177e2005-04-16 15:20:36 -07001798endmenu
1799
1800menu "Boot options"
1801
Grant Likely9eb8f672011-04-28 14:27:20 -06001802config USE_OF
1803 bool "Flattened Device Tree support"
Russell Kingb1b3f492012-10-06 17:12:25 +01001804 select IRQ_DOMAIN
Grant Likely9eb8f672011-04-28 14:27:20 -06001805 select OF
Grant Likely9eb8f672011-04-28 14:27:20 -06001806 help
1807 Include support for flattened device tree machine descriptions.
1808
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01001809config ATAGS
1810 bool "Support for the traditional ATAGS boot data passing" if USE_OF
1811 default y
1812 help
1813 This is the traditional way of passing data to the kernel at boot
1814 time. If you are solely relying on the flattened device tree (or
1815 the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
1816 to remove ATAGS support from your kernel binary. If unsure,
1817 leave this to y.
1818
1819config DEPRECATED_PARAM_STRUCT
1820 bool "Provide old way to pass kernel parameters"
1821 depends on ATAGS
1822 help
1823 This was deprecated in 2001 and announced to live on for 5 years.
1824 Some old boot loaders still use this way.
1825
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826# Compressed boot loader in ROM. Yes, we really want to ask about
1827# TEXT and BSS so we preserve their values in the config files.
1828config ZBOOT_ROM_TEXT
1829 hex "Compressed ROM boot loader base address"
1830 default "0"
1831 help
1832 The physical address at which the ROM-able zImage is to be
1833 placed in the target. Platforms which normally make use of
1834 ROM-able zImage formats normally set this to a suitable
1835 value in their defconfig file.
1836
1837 If ZBOOT_ROM is not enabled, this has no effect.
1838
1839config ZBOOT_ROM_BSS
1840 hex "Compressed ROM boot loader BSS address"
1841 default "0"
1842 help
Dan Fandrichf8c440b2006-09-20 23:28:51 +01001843 The base address of an area of read/write memory in the target
1844 for the ROM-able zImage which must be available while the
1845 decompressor is running. It must be large enough to hold the
1846 entire decompressed kernel plus an additional 128 KiB.
1847 Platforms which normally make use of ROM-able zImage formats
1848 normally set this to a suitable value in their defconfig file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849
1850 If ZBOOT_ROM is not enabled, this has no effect.
1851
1852config ZBOOT_ROM
1853 bool "Compressed boot loader in ROM/flash"
1854 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
Russell King10968132014-01-01 11:59:44 +00001855 depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR
Linus Torvalds1da177e2005-04-16 15:20:36 -07001856 help
1857 Say Y here if you intend to execute your compressed kernel image
1858 (zImage) directly from ROM or flash. If unsure, say N.
1859
John Bonesioe2a6a3a2011-05-27 18:45:50 -04001860config ARM_APPENDED_DTB
1861 bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
Russell King10968132014-01-01 11:59:44 +00001862 depends on OF
John Bonesioe2a6a3a2011-05-27 18:45:50 -04001863 help
1864 With this option, the boot code will look for a device tree binary
1865 (DTB) appended to zImage
1866 (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1867
1868 This is meant as a backward compatibility convenience for those
1869 systems with a bootloader that can't be upgraded to accommodate
1870 the documented boot protocol using a device tree.
1871
1872 Beware that there is very little in terms of protection against
1873 this option being confused by leftover garbage in memory that might
1874 look like a DTB header after a reboot if no actual DTB is appended
1875 to zImage. Do not leave this option active in a production kernel
1876 if you don't intend to always append a DTB. Proper passing of the
1877 location into r2 of a bootloader provided DTB is always preferable
1878 to this option.
1879
Nicolas Pitreb90b9a32011-09-13 22:37:07 -04001880config ARM_ATAG_DTB_COMPAT
1881 bool "Supplement the appended DTB with traditional ATAG information"
1882 depends on ARM_APPENDED_DTB
1883 help
1884 Some old bootloaders can't be updated to a DTB capable one, yet
1885 they provide ATAGs with memory configuration, the ramdisk address,
1886 the kernel cmdline string, etc. Such information is dynamically
1887 provided by the bootloader and can't always be stored in a static
1888 DTB. To allow a device tree enabled kernel to be used with such
1889 bootloaders, this option allows zImage to extract the information
1890 from the ATAG list and store it at run time into the appended DTB.
1891
Genoud Richardd0f34a112012-06-26 16:37:59 +01001892choice
1893 prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
1894 default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1895
1896config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1897 bool "Use bootloader kernel arguments if available"
1898 help
1899 Uses the command-line options passed by the boot loader instead of
1900 the device tree bootargs property. If the boot loader doesn't provide
1901 any, the device tree bootargs property will be used.
1902
1903config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
1904 bool "Extend with bootloader kernel arguments"
1905 help
1906 The command-line arguments provided by the boot loader will be
1907 appended to the the device tree bootargs property.
1908
1909endchoice
1910
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911config CMDLINE
1912 string "Default kernel command string"
1913 default ""
1914 help
1915 On some architectures (EBSA110 and CATS), there is currently no way
1916 for the boot loader to pass arguments to the kernel. For these
1917 architectures, you should supply some command-line options at build
1918 time by entering them here. As a minimum, you should specify the
1919 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1920
Victor Boivie4394c122011-05-04 17:07:55 +01001921choice
1922 prompt "Kernel command line type" if CMDLINE != ""
1923 default CMDLINE_FROM_BOOTLOADER
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01001924 depends on ATAGS
Victor Boivie4394c122011-05-04 17:07:55 +01001925
1926config CMDLINE_FROM_BOOTLOADER
1927 bool "Use bootloader kernel arguments if available"
1928 help
1929 Uses the command-line options passed by the boot loader. If
1930 the boot loader doesn't provide any, the default kernel command
1931 string provided in CMDLINE will be used.
1932
1933config CMDLINE_EXTEND
1934 bool "Extend bootloader kernel arguments"
1935 help
1936 The command-line arguments provided by the boot loader will be
1937 appended to the default kernel command string.
1938
Alexander Holler92d20402010-02-16 19:04:53 +01001939config CMDLINE_FORCE
1940 bool "Always use the default kernel command string"
Alexander Holler92d20402010-02-16 19:04:53 +01001941 help
1942 Always use the default kernel command string, even if the boot
1943 loader passes other arguments to the kernel.
1944 This is useful if you cannot or don't want to change the
1945 command-line options your boot loader passes to the kernel.
Victor Boivie4394c122011-05-04 17:07:55 +01001946endchoice
Alexander Holler92d20402010-02-16 19:04:53 +01001947
Linus Torvalds1da177e2005-04-16 15:20:36 -07001948config XIP_KERNEL
1949 bool "Kernel Execute-In-Place from ROM"
Russell King10968132014-01-01 11:59:44 +00001950 depends on !ARM_LPAE && !ARCH_MULTIPLATFORM
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951 help
1952 Execute-In-Place allows the kernel to run from non-volatile storage
1953 directly addressable by the CPU, such as NOR flash. This saves RAM
1954 space since the text section of the kernel is not loaded from flash
1955 to RAM. Read-write sections, such as the data section and stack,
1956 are still copied to RAM. The XIP kernel is not compressed since
1957 it has to run directly from flash, so it will take more space to
1958 store it. The flash address used to link the kernel object files,
1959 and for storing it, is configuration dependent. Therefore, if you
1960 say Y here, you must know the proper physical address where to
1961 store the kernel image depending on your own flash memory usage.
1962
1963 Also note that the make target becomes "make xipImage" rather than
1964 "make zImage" or "make Image". The final kernel binary to put in
1965 ROM memory will be arch/arm/boot/xipImage.
1966
1967 If unsure, say N.
1968
1969config XIP_PHYS_ADDR
1970 hex "XIP Kernel Physical Location"
1971 depends on XIP_KERNEL
1972 default "0x00080000"
1973 help
1974 This is the physical address in your flash memory the kernel will
1975 be linked for and stored to. This address is dependent on your
1976 own flash usage.
1977
Richard Purdiec587e4a2007-02-06 21:29:00 +01001978config KEXEC
1979 bool "Kexec system call (EXPERIMENTAL)"
Stephen Warren19ab4282013-06-14 16:14:14 +01001980 depends on (!SMP || PM_SLEEP_SMP)
Arnd Bergmanncb1293e2015-05-26 15:40:44 +01001981 depends on !CPU_V7M
Dave Young2965faa2015-09-09 15:38:55 -07001982 select KEXEC_CORE
Richard Purdiec587e4a2007-02-06 21:29:00 +01001983 help
1984 kexec is a system call that implements the ability to shutdown your
1985 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante01dd2fb2007-10-20 01:34:40 +02001986 but it is independent of the system firmware. And like a reboot
Richard Purdiec587e4a2007-02-06 21:29:00 +01001987 you can start any kernel with it, not just Linux.
1988
1989 It is an ongoing process to be certain the hardware in a machine
1990 is properly shutdown, so do not be surprised if this code does not
Geert Uytterhoevenbf220692013-08-20 21:38:03 +02001991 initially work for you.
Richard Purdiec587e4a2007-02-06 21:29:00 +01001992
Richard Purdie4cd9d6f2008-01-02 00:56:46 +01001993config ATAGS_PROC
1994 bool "Export atags in procfs"
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01001995 depends on ATAGS && KEXEC
Uli Luckasb98d7292008-02-22 16:45:18 +01001996 default y
Richard Purdie4cd9d6f2008-01-02 00:56:46 +01001997 help
1998 Should the atags used to boot the kernel be exported in an "atags"
1999 file in procfs. Useful with kexec.
2000
Mika Westerbergcb5d39b2010-11-18 19:14:52 +01002001config CRASH_DUMP
2002 bool "Build kdump crash kernel (EXPERIMENTAL)"
Mika Westerbergcb5d39b2010-11-18 19:14:52 +01002003 help
2004 Generate crash dump after being started by kexec. This should
2005 be normally only set in special crash dump kernels which are
2006 loaded in the main kernel with kexec-tools into a specially
2007 reserved region and then later executed after a crash by
2008 kdump/kexec. The crash dump kernel must be compiled to a
2009 memory address not used by the main kernel
2010
2011 For more details see Documentation/kdump/kdump.txt
2012
Eric Miaoe69edc792010-07-05 15:56:50 +02002013config AUTO_ZRELADDR
2014 bool "Auto calculation of the decompressed kernel image address"
Eric Miaoe69edc792010-07-05 15:56:50 +02002015 help
2016 ZRELADDR is the physical address where the decompressed kernel
2017 image will be placed. If AUTO_ZRELADDR is selected, the address
2018 will be determined at run-time by masking the current IP with
2019 0xf8000000. This assumes the zImage being placed in the first 128MB
2020 from start of memory.
2021
Roy Franz81a0bc32015-09-23 20:17:54 -07002022config EFI_STUB
2023 bool
2024
2025config EFI
2026 bool "UEFI runtime support"
2027 depends on OF && !CPU_BIG_ENDIAN && MMU && AUTO_ZRELADDR && !XIP_KERNEL
2028 select UCS2_STRING
2029 select EFI_PARAMS_FROM_FDT
2030 select EFI_STUB
2031 select EFI_ARMSTUB
2032 select EFI_RUNTIME_WRAPPERS
2033 ---help---
2034 This option provides support for runtime services provided
2035 by UEFI firmware (such as non-volatile variables, realtime
2036 clock, and platform reset). A UEFI stub is also provided to
2037 allow the kernel to be booted as an EFI application. This
2038 is only useful for kernels that may run on systems that have
2039 UEFI firmware.
2040
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041endmenu
2042
Russell Kingac9d7ef2008-08-18 17:26:00 +01002043menu "CPU Power Management"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002044
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045source "drivers/cpufreq/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002046
Russell Kingac9d7ef2008-08-18 17:26:00 +01002047source "drivers/cpuidle/Kconfig"
2048
2049endmenu
2050
Linus Torvalds1da177e2005-04-16 15:20:36 -07002051menu "Floating point emulation"
2052
2053comment "At least one emulation must be selected"
2054
2055config FPE_NWFPE
2056 bool "NWFPE math emulation"
Dave Martin593c2522010-12-13 21:56:03 +01002057 depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058 ---help---
2059 Say Y to include the NWFPE floating point emulator in the kernel.
2060 This is necessary to run most binaries. Linux does not currently
2061 support floating point hardware so you need to say Y here even if
2062 your machine has an FPA or floating point co-processor podule.
2063
2064 You may say N here if you are going to load the Acorn FPEmulator
2065 early in the bootup.
2066
2067config FPE_NWFPE_XP
2068 bool "Support extended precision"
Lennert Buytenhekbedf1422005-11-07 21:12:08 +00002069 depends on FPE_NWFPE
Linus Torvalds1da177e2005-04-16 15:20:36 -07002070 help
2071 Say Y to include 80-bit support in the kernel floating-point
2072 emulator. Otherwise, only 32 and 64-bit support is compiled in.
2073 Note that gcc does not generate 80-bit operations by default,
2074 so in most cases this option only enlarges the size of the
2075 floating point emulator without any good reason.
2076
2077 You almost surely want to say N here.
2078
2079config FPE_FASTFPE
2080 bool "FastFPE math emulation (EXPERIMENTAL)"
Kees Cookd6f94fa2013-01-16 18:53:14 -08002081 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
Linus Torvalds1da177e2005-04-16 15:20:36 -07002082 ---help---
2083 Say Y here to include the FAST floating point emulator in the kernel.
2084 This is an experimental much faster emulator which now also has full
2085 precision for the mantissa. It does not support any exceptions.
2086 It is very simple, and approximately 3-6 times faster than NWFPE.
2087
2088 It should be sufficient for most programs. It may be not suitable
2089 for scientific calculations, but you have to check this for yourself.
2090 If you do not feel you need a faster FP emulation you should better
2091 choose NWFPE.
2092
2093config VFP
2094 bool "VFP-format floating point maths"
Russell Kinge399b1a2011-01-17 15:08:32 +00002095 depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096 help
2097 Say Y to include VFP support code in the kernel. This is needed
2098 if your hardware includes a VFP unit.
2099
2100 Please see <file:Documentation/arm/VFP/release-notes.txt> for
2101 release notes and additional status information.
2102
2103 Say N if your target does not have VFP hardware.
2104
Catalin Marinas25ebee02007-09-25 15:22:24 +01002105config VFPv3
2106 bool
2107 depends on VFP
2108 default y if CPU_V7
2109
Catalin Marinasb5872db2008-01-10 19:16:17 +01002110config NEON
2111 bool "Advanced SIMD (NEON) Extension support"
2112 depends on VFPv3 && CPU_V7
2113 help
2114 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2115 Extension.
2116
Ard Biesheuvel73c132c2013-05-16 11:41:48 +02002117config KERNEL_MODE_NEON
2118 bool "Support for NEON in kernel mode"
Russell Kingc4a30c32013-09-22 11:08:50 +01002119 depends on NEON && AEABI
Ard Biesheuvel73c132c2013-05-16 11:41:48 +02002120 help
2121 Say Y to include support for NEON in kernel mode.
2122
Linus Torvalds1da177e2005-04-16 15:20:36 -07002123endmenu
2124
2125menu "Userspace binary formats"
2126
2127source "fs/Kconfig.binfmt"
2128
Linus Torvalds1da177e2005-04-16 15:20:36 -07002129endmenu
2130
2131menu "Power management options"
2132
Russell Kingeceab4a2005-11-15 11:31:41 +00002133source "kernel/power/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002134
Johannes Bergf4cb5702007-12-08 02:14:00 +01002135config ARCH_SUSPEND_POSSIBLE
Ezequiel Garcia19a05192013-08-16 10:28:24 +01002136 depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
Uwe Kleine-Königf0d75152012-02-01 10:00:00 +01002137 CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
Johannes Bergf4cb5702007-12-08 02:14:00 +01002138 def_bool y
2139
Arnd Bergmann15e0d9e2011-10-01 21:09:39 +02002140config ARM_CPU_SUSPEND
Lorenzo Pieralisi8b6f2492016-02-01 18:01:30 +01002141 def_bool PM_SLEEP || BL_SWITCHER || ARM_PSCI_FW
Lorenzo Pieralisi1b9bdf52016-02-01 18:01:29 +01002142 depends on ARCH_SUSPEND_POSSIBLE
Arnd Bergmann15e0d9e2011-10-01 21:09:39 +02002143
Sebastian Capella603fb422014-03-25 01:20:29 +01002144config ARCH_HIBERNATION_POSSIBLE
2145 bool
2146 depends on MMU
2147 default y if ARCH_SUSPEND_POSSIBLE
2148
Linus Torvalds1da177e2005-04-16 15:20:36 -07002149endmenu
2150
Sam Ravnborgd5950b42005-07-11 21:03:49 -07002151source "net/Kconfig"
2152
Uwe Kleine-Königac251502009-08-13 21:09:21 +02002153source "drivers/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002154
Kumar Gala916f7432015-02-26 15:49:09 -06002155source "drivers/firmware/Kconfig"
2156
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157source "fs/Kconfig"
2158
Linus Torvalds1da177e2005-04-16 15:20:36 -07002159source "arch/arm/Kconfig.debug"
2160
2161source "security/Kconfig"
2162
2163source "crypto/Kconfig"
Ard Biesheuvel652ccae2015-03-10 09:47:44 +01002164if CRYPTO
2165source "arch/arm/crypto/Kconfig"
2166endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002167
2168source "lib/Kconfig"
Christoffer Dall749cf76c2013-01-20 18:28:06 -05002169
2170source "arch/arm/kvm/Kconfig"