blob: 00be82f3929f403bce6d2099dc3b0191233be6c8 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001config ARM
2 bool
3 default y
Scott Wood1d8f51d2016-09-22 03:35:18 -05004 select ARCH_CLOCKSOURCE_DATA
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
Kees Cookdfd45b62016-06-23 15:06:53 -070038 select HAVE_ARCH_HARDENED_USERCOPY
Arnd Bergmann437682ee2015-11-19 13:30:42 +010039 select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU
40 select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU
Daniel Cashmane0c25d92016-01-14 15:19:57 -080041 select HAVE_ARCH_MMAP_RND_BITS if MMU
Kees Cook91702172013-11-09 00:51:56 +010042 select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
Wade Farnsworth0693bf62012-04-04 16:19:47 +010043 select HAVE_ARCH_TRACEHOOK
Jens Wiklanderb329f952016-01-04 15:42:55 +010044 select HAVE_ARM_SMCCC if CPU_V7
Daniel Borkmann60777762016-05-13 19:08:28 +020045 select HAVE_CBPF_JIT
Russell King51aaf812014-04-22 22:26:27 +010046 select HAVE_CC_STACKPROTECTOR
Russell King171b3f02013-09-12 21:24:42 +010047 select HAVE_CONTEXT_TRACKING
Russell Kingb1b3f492012-10-06 17:12:25 +010048 select HAVE_C_RECORDMCOUNT
49 select HAVE_DEBUG_KMEMLEAK
50 select HAVE_DMA_API_DEBUG
Russell Kingb1b3f492012-10-06 17:12:25 +010051 select HAVE_DMA_CONTIGUOUS if MMU
Arnd Bergmann437682ee2015-11-19 13:30:42 +010052 select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) && !CPU_ENDIAN_BE32 && MMU
Will Deacondce5c9e2013-12-17 19:50:16 +010053 select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU
Jiri Slaby5f56a5d2016-05-20 17:00:16 -070054 select HAVE_EXIT_THREAD
Russell Kingb1b3f492012-10-06 17:12:25 +010055 select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
56 select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
57 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
Emese Revfy6b90bd42016-05-24 00:09:38 +020058 select HAVE_GCC_PLUGINS
Russell Kingb1b3f492012-10-06 17:12:25 +010059 select HAVE_GENERIC_DMA_COHERENT
Russell Kingb1b3f492012-10-06 17:12:25 +010060 select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
61 select HAVE_IDE if PCI || ISA || PCMCIA
Russell King87c46b62013-05-04 14:38:59 +010062 select HAVE_IRQ_TIME_ACCOUNTING
Russell Kingb1b3f492012-10-06 17:12:25 +010063 select HAVE_KERNEL_GZIP
Kyungsik Leef9b493a2013-07-08 16:01:48 -070064 select HAVE_KERNEL_LZ4
Russell Kingb1b3f492012-10-06 17:12:25 +010065 select HAVE_KERNEL_LZMA
66 select HAVE_KERNEL_LZO
67 select HAVE_KERNEL_XZ
Arnd Bergmanncb1293e2015-05-26 15:40:44 +010068 select HAVE_KPROBES if !XIP_KERNEL && !CPU_ENDIAN_BE32 && !CPU_V7M
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -080069 select HAVE_KRETPROBES if (HAVE_KPROBES)
Russell Kingb1b3f492012-10-06 17:12:25 +010070 select HAVE_MEMBLOCK
Ard Biesheuvel7d485f62014-11-24 16:54:35 +010071 select HAVE_MOD_ARCH_SPECIFIC
Petr Mladek42a0bb32016-05-20 17:00:33 -070072 select HAVE_NMI
Russell Kingb1b3f492012-10-06 17:12:25 +010073 select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
Wang Nan0dc016d2015-01-09 14:37:36 +080074 select HAVE_OPTPROBES if !THUMB2_KERNEL
Jamie Iles7ada1892010-02-02 20:24:58 +010075 select HAVE_PERF_EVENTS
Will Deacon49863892013-09-26 12:36:35 +010076 select HAVE_PERF_REGS
77 select HAVE_PERF_USER_STACK_DUMP
Steve Cappera0ad5492014-10-09 15:29:18 -070078 select HAVE_RCU_TABLE_FREE if (SMP && ARM_LPAE)
Will Deacone513f8b2010-06-25 12:24:53 +010079 select HAVE_REGS_AND_STACK_ACCESS_API
Russell Kingb1b3f492012-10-06 17:12:25 +010080 select HAVE_SYSCALL_TRACEPOINTS
Catalin Marinasaf1839e2012-10-08 16:28:08 -070081 select HAVE_UID16
Kevin Hilman31c1fc82013-09-16 15:28:22 -070082 select HAVE_VIRT_CPU_ACCOUNTING_GEN
Thomas Gleixnerda0ec6f2013-08-14 20:43:17 +010083 select IRQ_FORCED_THREADING
Russell King171b3f02013-09-12 21:24:42 +010084 select MODULES_USE_ELF_REL
Santosh Shilimkar84f452b2013-06-30 00:28:46 -040085 select NO_BOOTMEM
Arnd Bergmannaa7d5f12015-11-19 13:20:54 +010086 select OF_EARLY_FLATTREE if OF
87 select OF_RESERVED_MEM if OF
Russell King171b3f02013-09-12 21:24:42 +010088 select OLD_SIGACTION
89 select OLD_SIGSUSPEND3
Russell Kingb1b3f492012-10-06 17:12:25 +010090 select PERF_USE_VMALLOC
91 select RTC_LIB
92 select SYS_SUPPORTS_APM_EMULATION
Russell King171b3f02013-09-12 21:24:42 +010093 # Above selects are sorted alphabetically; please add new ones
94 # according to that. Thanks.
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 help
96 The ARM series is a line of low-power-consumption RISC chip designs
Martin Michlmayrf6c89652006-02-08 21:09:07 +000097 licensed by ARM Ltd and targeted at embedded applications and
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
Martin Michlmayrf6c89652006-02-08 21:09:07 +000099 manufactured, but legacy ARM-based PC hardware remains popular in
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 Europe. There is an ARM Linux project with a web page at
101 <http://www.arm.linux.org.uk/>.
102
Russell King74facff2011-06-02 11:16:22 +0100103config ARM_HAS_SG_CHAIN
Laura Abbott308c09f2014-08-08 14:23:25 -0700104 select ARCH_HAS_SG_CHAIN
Russell King74facff2011-06-02 11:16:22 +0100105 bool
106
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200107config NEED_SG_DMA_LENGTH
108 bool
109
110config ARM_DMA_USE_IOMMU
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200111 bool
Russell Kingb1b3f492012-10-06 17:12:25 +0100112 select ARM_HAS_SG_CHAIN
113 select NEED_SG_DMA_LENGTH
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200114
Seung-Woo Kim60460ab2013-02-06 13:21:14 +0900115if ARM_DMA_USE_IOMMU
116
117config ARM_DMA_IOMMU_ALIGNMENT
118 int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
119 range 4 9
120 default 8
121 help
122 DMA mapping framework by default aligns all buffers to the smallest
123 PAGE_SIZE order which is greater than or equal to the requested buffer
124 size. This works well for buffers up to a few hundreds kilobytes, but
125 for larger buffers it just a waste of address space. Drivers which has
126 relatively small addressing window (like 64Mib) might run out of
127 virtual space with just a few allocations.
128
129 With this parameter you can specify the maximum PAGE_SIZE order for
130 DMA IOMMU buffers. Larger buffers will be aligned only to this
131 specified order. The order is expressed as a power of two multiplied
132 by the PAGE_SIZE.
133
134endif
135
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +0100136config MIGHT_HAVE_PCI
137 bool
138
Ralf Baechle75e71532007-02-09 17:08:58 +0000139config SYS_SUPPORTS_APM_EMULATION
140 bool
141
Linus Walleijbc581772009-09-15 17:30:37 +0100142config HAVE_TCM
143 bool
144 select GENERIC_ALLOCATOR
145
Russell Kinge119bff2010-01-10 17:23:29 +0000146config HAVE_PROC_CPU
147 bool
148
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700149config NO_IOPORT_MAP
Al Viro5ea81762007-02-11 15:41:31 +0000150 bool
Al Viro5ea81762007-02-11 15:41:31 +0000151
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152config EISA
153 bool
154 ---help---
155 The Extended Industry Standard Architecture (EISA) bus was
156 developed as an open alternative to the IBM MicroChannel bus.
157
158 The EISA bus provided some of the features of the IBM MicroChannel
159 bus while maintaining backward compatibility with cards made for
160 the older ISA bus. The EISA bus saw limited use between 1988 and
161 1995 when it was made obsolete by the PCI bus.
162
163 Say Y here if you are building a kernel for an EISA-based machine.
164
165 Otherwise, say N.
166
167config SBUS
168 bool
169
Russell Kingf16fb1e2007-04-28 09:59:37 +0100170config STACKTRACE_SUPPORT
171 bool
172 default y
173
174config LOCKDEP_SUPPORT
175 bool
176 default y
177
Russell King7ad1bcb2006-08-27 12:07:02 +0100178config TRACE_IRQFLAGS_SUPPORT
179 bool
Arnd Bergmanncb1293e2015-05-26 15:40:44 +0100180 default !CPU_V7M
Russell King7ad1bcb2006-08-27 12:07:02 +0100181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182config RWSEM_XCHGADD_ALGORITHM
183 bool
Will Deacon8a874112014-05-02 17:06:19 +0100184 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
David Howellsf0d1b0b2006-12-08 02:37:49 -0800186config ARCH_HAS_ILOG2_U32
187 bool
David Howellsf0d1b0b2006-12-08 02:37:49 -0800188
189config ARCH_HAS_ILOG2_U64
190 bool
David Howellsf0d1b0b2006-12-08 02:37:49 -0800191
Eduardo Valentin4a1b5732013-06-13 22:58:52 +0100192config ARCH_HAS_BANDGAP
193 bool
194
Stefan Agnera5f4c562015-08-13 00:01:52 +0100195config FIX_EARLYCON_MEM
196 def_bool y if MMU
197
Akinobu Mitab89c3b12006-03-26 01:39:19 -0800198config GENERIC_HWEIGHT
199 bool
200 default y
201
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202config GENERIC_CALIBRATE_DELAY
203 bool
204 default y
205
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100206config ARCH_MAY_HAVE_PC_FDC
207 bool
208
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800209config ZONE_DMA
210 bool
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800211
FUJITA Tomonoriccd7ab72010-03-10 15:23:23 -0800212config NEED_DMA_MAP_STATE
213 def_bool y
214
David A. Longc7edc9e2014-03-07 11:23:04 -0500215config ARCH_SUPPORTS_UPROBES
216 def_bool y
217
Rob Herring58af4a22012-03-20 14:33:01 -0500218config ARCH_HAS_DMA_SET_COHERENT_MASK
219 bool
220
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221config GENERIC_ISA_DMA
222 bool
223
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224config FIQ
225 bool
226
Rob Herring13a50452012-02-07 09:28:22 -0600227config NEED_RET_TO_USER
228 bool
229
Al Viro034d2f52005-12-19 16:27:59 -0500230config ARCH_MTD_XIP
231 bool
232
Hyok S. Choic760fc12006-03-27 15:18:50 +0100233config VECTORS_BASE
234 hex
Hyok S. Choi6afd6fa2006-09-28 21:46:34 +0900235 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
Hyok S. Choic760fc12006-03-27 15:18:50 +0100236 default DRAM_BASE if REMAP_VECTORS_TO_RAM
237 default 0x00000000
238 help
Russell King19accfd2013-07-04 11:40:32 +0100239 The base address of exception vectors. This must be two pages
240 in size.
Hyok S. Choic760fc12006-03-27 15:18:50 +0100241
Russell Kingdc21af92011-01-04 19:09:43 +0000242config ARM_PATCH_PHYS_VIRT
Russell Kingc1beced2011-08-10 10:23:45 +0100243 bool "Patch physical to virtual translations at runtime" if EMBEDDED
244 default y
Nicolas Pitreb511d752011-02-21 06:53:35 +0100245 depends on !XIP_KERNEL && MMU
Russell Kingdc21af92011-01-04 19:09:43 +0000246 help
Russell King111e9a52011-05-12 10:02:42 +0100247 Patch phys-to-virt and virt-to-phys translation functions at
248 boot and module load time according to the position of the
249 kernel in system memory.
Russell Kingdc21af92011-01-04 19:09:43 +0000250
Russell King111e9a52011-05-12 10:02:42 +0100251 This can only be used with non-XIP MMU kernels where the base
Nicolas Pitredaece592011-08-12 00:14:29 +0100252 of physical memory is at a 16MB boundary.
Russell Kingdc21af92011-01-04 19:09:43 +0000253
Russell Kingc1beced2011-08-10 10:23:45 +0100254 Only disable this option if you know that you do not require
255 this feature (eg, building a kernel for a single machine) and
256 you need to shrink the kernel to the minimal size.
257
Rob Herringc334bc12012-03-04 22:03:33 -0600258config NEED_MACH_IO_H
259 bool
260 help
261 Select this when mach/io.h is required to provide special
262 definitions for this platform. The need for mach/io.h should
263 be avoided when possible.
264
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400265config NEED_MACH_MEMORY_H
Nicolas Pitre1b9f95f2011-07-05 22:52:51 -0400266 bool
Russell King111e9a52011-05-12 10:02:42 +0100267 help
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400268 Select this when mach/memory.h is required to provide special
269 definitions for this platform. The need for mach/memory.h should
270 be avoided when possible.
Nicolas Pitre1b9f95f2011-07-05 22:52:51 -0400271
272config PHYS_OFFSET
Nicolas Pitre974c0722011-12-02 23:09:42 +0100273 hex "Physical address of main memory" if MMU
Uwe Kleine-Königc6f54a92014-07-23 20:37:43 +0100274 depends on !ARM_PATCH_PHYS_VIRT
Nicolas Pitre974c0722011-12-02 23:09:42 +0100275 default DRAM_BASE if !MMU
Uwe Kleine-Königc6f54a92014-07-23 20:37:43 +0100276 default 0x00000000 if ARCH_EBSA110 || \
Uwe Kleine-Königc6f54a92014-07-23 20:37:43 +0100277 ARCH_FOOTBRIDGE || \
278 ARCH_INTEGRATOR || \
279 ARCH_IOP13XX || \
280 ARCH_KS8695 || \
Linus Walleij8f2c0062016-08-10 14:30:35 +0200281 ARCH_REALVIEW
Uwe Kleine-Königc6f54a92014-07-23 20:37:43 +0100282 default 0x10000000 if ARCH_OMAP1 || ARCH_RPC
283 default 0x20000000 if ARCH_S5PV210
H Hartley Sweetenb8824c92015-06-15 10:35:06 -0700284 default 0xc0000000 if ARCH_SA1100
Nicolas Pitre1b9f95f2011-07-05 22:52:51 -0400285 help
286 Please provide the physical address corresponding to the
287 location of main memory in your system.
Russell Kingcada3c02011-01-04 19:39:29 +0000288
Simon Glass87e040b2011-08-16 23:44:26 +0100289config GENERIC_BUG
290 def_bool y
291 depends on BUG
292
Kirill A. Shutemov1bcad262015-04-14 15:45:42 -0700293config PGTABLE_LEVELS
294 int
295 default 3 if ARM_LPAE
296 default 2
297
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298source "init/Kconfig"
299
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700300source "kernel/Kconfig.freezer"
301
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302menu "System Type"
303
Hyok S. Choi3c427972009-07-24 12:35:00 +0100304config MMU
305 bool "MMU-based Paged Memory Management Support"
306 default y
307 help
308 Select if you want MMU-based virtualised addressing space
309 support by paged memory management. If unsure, say 'Y'.
310
Daniel Cashmane0c25d92016-01-14 15:19:57 -0800311config ARCH_MMAP_RND_BITS_MIN
312 default 8
313
314config ARCH_MMAP_RND_BITS_MAX
315 default 14 if PAGE_OFFSET=0x40000000
316 default 15 if PAGE_OFFSET=0x80000000
317 default 16
318
Russell Kingccf50e22010-03-15 19:03:06 +0000319#
320# The "ARM system type" choice list is ordered alphabetically by option
321# text. Please add new entries in the option alphabetic order.
322#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323choice
324 prompt "ARM system type"
Arnd Bergmann70722802015-12-17 17:45:47 +0100325 default ARM_SINGLE_ARMV7M if !MMU
Arnd Bergmann1420b222013-02-14 13:33:36 +0100326 default ARCH_MULTIPLATFORM if MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
Rob Herring387798b2012-09-06 13:41:12 -0500328config ARCH_MULTIPLATFORM
329 bool "Allow multiple platforms to be selected"
Russell Kingb1b3f492012-10-06 17:12:25 +0100330 depends on MMU
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
Kishon Vijay Abraham Ie13688f2016-09-14 15:49:06 +0530339 select PCI_DOMAINS if PCI
Dinh Nguyen66314222012-07-18 16:07:18 -0600340 select SPARSE_IRQ
341 select USE_OF
Dinh Nguyen66314222012-07-18 16:07:18 -0600342
Stefan Agner9c77bc42015-05-20 00:03:51 +0200343config ARM_SINGLE_ARMV7M
344 bool "ARMv7-M based platforms (Cortex-M0/M3/M4)"
345 depends on !MMU
Stefan Agner9c77bc42015-05-20 00:03:51 +0200346 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
Russell King788c9702009-04-26 14:21:59 +0100356config ARCH_GEMINI
357 bool "Cortina Systems Gemini"
Linus Walleijf3372c02013-10-01 12:57:20 +0200358 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100359 select CPU_FA526
Linus Walleijf3372c02013-10-01 12:57:20 +0200360 select GENERIC_CLOCKEVENTS
Linus Walleij5c34a4e2016-06-02 14:10:16 +0200361 select GPIOLIB
Russell King788c9702009-04-26 14:21:59 +0100362 help
363 Support for the Cortina Systems Gemini family SoCs
364
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365config ARCH_EBSA110
366 bool "EBSA-110"
Russell Kingb1b3f492012-10-06 17:12:25 +0100367 select ARCH_USES_GETTIMEOFFSET
Russell Kingc7508152008-10-26 10:55:14 +0000368 select CPU_SA110
Russell Kingf7e68bb2005-05-05 14:49:01 +0100369 select ISA
Rob Herringc334bc12012-03-04 22:03:33 -0600370 select NEED_MACH_IO_H
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400371 select NEED_MACH_MEMORY_H
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700372 select NO_IOPORT_MAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 help
374 This is an evaluation board for the StrongARM processor available
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000375 from Digital. It has limited hardware on-board, including an
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 Ethernet interface, two PCMCIA sockets, two serial ports and a
377 parallel port.
378
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000379config ARCH_EP93XX
380 bool "EP93xx-based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100381 select ARCH_HAS_HOLES_MEMORYMODEL
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000382 select ARM_AMBA
H Hartley Sweetenb8824c92015-06-15 10:35:06 -0700383 select ARM_PATCH_PHYS_VIRT
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000384 select ARM_VIC
H Hartley Sweetenb8824c92015-06-15 10:35:06 -0700385 select AUTO_ZRELADDR
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100386 select CLKDEV_LOOKUP
Linus Walleij000bc172015-06-15 14:34:03 +0200387 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100388 select CPU_ARM920T
Linus Walleij000bc172015-06-15 14:34:03 +0200389 select GENERIC_CLOCKEVENTS
Linus Walleij5c34a4e2016-06-02 14:10:16 +0200390 select GPIOLIB
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000391 help
392 This enables support for the Cirrus EP93xx series of CPUs.
393
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394config ARCH_FOOTBRIDGE
395 bool "FootBridge"
Russell Kingc7508152008-10-26 10:55:14 +0000396 select CPU_SA110
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 select FOOTBRIDGE
Russell King4e8d7632011-01-28 21:00:39 +0000398 select GENERIC_CLOCKEVENTS
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200399 select HAVE_IDE
Rob Herring8ef6e622012-03-01 20:48:12 -0600400 select NEED_MACH_IO_H if !MMU
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400401 select NEED_MACH_MEMORY_H
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000402 help
403 Support for systems based on the DC21285 companion chip
404 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100406config ARCH_NETX
407 bool "Hilscher NetX based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100408 select ARM_VIC
Russell King234b6ced2011-05-08 14:09:47 +0100409 select CLKSRC_MMIO
Russell Kingc7508152008-10-26 10:55:14 +0000410 select CPU_ARM926T
Uwe Kleine-König2fcfe6b2008-12-09 21:57:24 +0100411 select GENERIC_CLOCKEVENTS
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000412 help
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100413 This enables support for systems based on the Hilscher NetX Soc
414
Russell King3b938be2007-05-12 11:25:44 +0100415config ARCH_IOP13XX
416 bool "IOP13xx-based"
417 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100418 select CPU_XSC3
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400419 select NEED_MACH_MEMORY_H
Rob Herring13a50452012-02-07 09:28:22 -0600420 select NEED_RET_TO_USER
Russell Kingb1b3f492012-10-06 17:12:25 +0100421 select PCI
422 select PLAT_IOP
423 select VMSPLIT_1G
Thomas Gleixner37ebbcf2014-05-07 15:44:04 +0000424 select SPARSE_IRQ
Russell King3b938be2007-05-12 11:25:44 +0100425 help
426 Support for Intel's IOP13XX (XScale) family of processors.
427
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100428config ARCH_IOP32X
429 bool "IOP32x-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100430 depends on MMU
Russell Kingc7508152008-10-26 10:55:14 +0000431 select CPU_XSCALE
Linus Walleije9004f52013-09-09 11:59:51 +0200432 select GPIO_IOP
Linus Walleij5c34a4e2016-06-02 14:10:16 +0200433 select GPIOLIB
Rob Herring13a50452012-02-07 09:28:22 -0600434 select NEED_RET_TO_USER
Russell Kingf7e68bb2005-05-05 14:49:01 +0100435 select PCI
Russell Kingb1b3f492012-10-06 17:12:25 +0100436 select PLAT_IOP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000437 help
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100438 Support for Intel's 80219 and IOP32X (XScale) family of
439 processors.
440
441config ARCH_IOP33X
442 bool "IOP33x-based"
443 depends on MMU
Russell Kingc7508152008-10-26 10:55:14 +0000444 select CPU_XSCALE
Linus Walleije9004f52013-09-09 11:59:51 +0200445 select GPIO_IOP
Linus Walleij5c34a4e2016-06-02 14:10:16 +0200446 select GPIOLIB
Rob Herring13a50452012-02-07 09:28:22 -0600447 select NEED_RET_TO_USER
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100448 select PCI
Russell Kingb1b3f492012-10-06 17:12:25 +0100449 select PLAT_IOP
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100450 help
451 Support for Intel's IOP33X (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452
Russell King3b938be2007-05-12 11:25:44 +0100453config ARCH_IXP4XX
454 bool "IXP4xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100455 depends on MMU
Rob Herring58af4a22012-03-20 14:33:01 -0500456 select ARCH_HAS_DMA_SET_COHERENT_MASK
Russell King51aaf812014-04-22 22:26:27 +0100457 select ARCH_SUPPORTS_BIG_ENDIAN
Russell King234b6ced2011-05-08 14:09:47 +0100458 select CLKSRC_MMIO
Russell Kingc7508152008-10-26 10:55:14 +0000459 select CPU_XSCALE
Russell Kingb1b3f492012-10-06 17:12:25 +0100460 select DMABOUNCE if PCI
Russell King3b938be2007-05-12 11:25:44 +0100461 select GENERIC_CLOCKEVENTS
Linus Walleij5c34a4e2016-06-02 14:10:16 +0200462 select GPIOLIB
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +0100463 select MIGHT_HAVE_PCI
Rob Herringc334bc12012-03-04 22:03:33 -0600464 select NEED_MACH_IO_H
Florian Fainelli9296d942013-04-09 14:29:26 +0200465 select USB_EHCI_BIG_ENDIAN_DESC
Russell King171b3f02013-09-12 21:24:42 +0100466 select USB_EHCI_BIG_ENDIAN_MMIO
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100467 help
Russell King3b938be2007-05-12 11:25:44 +0100468 Support for Intel's IXP4XX (XScale) family of processors.
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100469
Saeed Bisharaedabd382009-08-06 15:12:43 +0300470config ARCH_DOVE
471 bool "Marvell Dove"
Sebastian Hesselbarth756b2532013-05-02 19:56:12 +0100472 select CPU_PJ4
Saeed Bisharaedabd382009-08-06 15:12:43 +0300473 select GENERIC_CLOCKEVENTS
Linus Walleij5c34a4e2016-06-02 14:10:16 +0200474 select GPIOLIB
Russell King0f81bd42012-09-09 20:34:13 +0100475 select MIGHT_HAVE_PCI
Arnd Bergmannb8cd3372015-12-02 22:27:04 +0100476 select MULTI_IRQ_HANDLER
Russell King171b3f02013-09-12 21:24:42 +0100477 select MVEBU_MBUS
Sebastian Hesselbarth9139acd2012-11-19 10:39:55 +0100478 select PINCTRL
479 select PINCTRL_DOVE
Thomas Petazzoniabcda1d2012-09-11 14:27:27 +0200480 select PLAT_ORION_LEGACY
Arnd Bergmann5cdbe5d2015-12-02 22:27:05 +0100481 select SPARSE_IRQ
Russell Kingc5d431e2015-12-08 10:58:09 +0000482 select PM_GENERIC_DOMAINS if PM
Saeed Bisharaedabd382009-08-06 15:12:43 +0300483 help
484 Support for the Marvell Dove SoC 88AP510
485
Andrew Victorc53c9cf2007-05-11 21:01:28 +0100486config ARCH_KS8695
487 bool "Micrel/Kendin KS8695"
Linus Walleijc7e783d2012-08-29 20:27:22 +0200488 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100489 select CPU_ARM922T
Linus Walleijc7e783d2012-08-29 20:27:22 +0200490 select GENERIC_CLOCKEVENTS
Linus Walleij5c34a4e2016-06-02 14:10:16 +0200491 select GPIOLIB
Russell Kingb1b3f492012-10-06 17:12:25 +0100492 select NEED_MACH_MEMORY_H
Andrew Victorc53c9cf2007-05-11 21:01:28 +0100493 help
494 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
495 System-on-Chip devices.
496
Russell King788c9702009-04-26 14:21:59 +0100497config ARCH_W90X900
498 bool "Nuvoton W90X900 CPU"
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100499 select CLKDEV_LOOKUP
Russell King6fa5d5f2011-05-08 15:34:39 +0100500 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100501 select CPU_ARM926T
wanzongshun58b53692009-08-14 15:36:44 +0100502 select GENERIC_CLOCKEVENTS
Linus Walleij5c34a4e2016-06-02 14:10:16 +0200503 select GPIOLIB
Lennert Buytenhek777f9be2008-06-22 22:45:02 +0200504 help
wanzongshuna8bc4ea2009-08-14 15:38:29 +0100505 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
506 At present, the w90x900 has been renamed nuc900, regarding
507 the ARM series product line, you can login the following
508 link address to know more.
509
510 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
511 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
Tzachi Perelstein585cf172007-10-23 15:14:41 -0400512
Russell King93e22562012-10-12 14:20:52 +0100513config ARCH_LPC32XX
514 bool "NXP LPC32XX"
Russell King93e22562012-10-12 14:20:52 +0100515 select ARM_AMBA
Russell King40737232011-01-06 22:32:52 +0000516 select CLKDEV_LOOKUP
Vladimir Zapolskiyc227f122015-11-20 03:05:10 +0200517 select CLKSRC_LPC32XX
518 select COMMON_CLK
Russell King93e22562012-10-12 14:20:52 +0100519 select CPU_ARM926T
520 select GENERIC_CLOCKEVENTS
Linus Walleij5c34a4e2016-06-02 14:10:16 +0200521 select GPIOLIB
Vladimir Zapolskiy8cb17b52016-04-25 04:00:38 +0300522 select MULTI_IRQ_HANDLER
523 select SPARSE_IRQ
Russell King93e22562012-10-12 14:20:52 +0100524 select USE_OF
525 help
526 Support for the NXP LPC32XX family of processors
527
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528config ARCH_PXA
eric miao2c8086a2007-09-11 19:13:17 -0700529 bool "PXA2xx/PXA3xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100530 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100531 select ARCH_MTD_XIP
Russell Kingb1b3f492012-10-06 17:12:25 +0100532 select ARM_CPU_SUSPEND if PM
533 select AUTO_ZRELADDR
Robert Jarzmika1c0a6a2015-02-07 22:54:03 +0100534 select COMMON_CLK
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100535 select CLKDEV_LOOKUP
Daniel Lezcano389d9b52015-10-09 15:48:38 +0200536 select CLKSRC_PXA
Russell King234b6ced2011-05-08 14:09:47 +0100537 select CLKSRC_MMIO
Robert Jarzmik6f6caea2014-07-14 18:52:03 +0200538 select CLKSRC_OF
Arnd Bergmann2f202862016-01-29 15:06:29 +0100539 select CPU_XSCALE if !CPU_XSC3
Eric Miao981d0f32007-07-24 01:22:43 +0100540 select GENERIC_CLOCKEVENTS
Haojian Zhuang157d2642011-10-17 20:37:52 +0800541 select GPIO_PXA
Linus Walleij5c34a4e2016-06-02 14:10:16 +0200542 select GPIOLIB
Russell Kingb1b3f492012-10-06 17:12:25 +0100543 select HAVE_IDE
Robert Jarzmikd6cf30c2015-02-14 22:41:56 +0100544 select IRQ_DOMAIN
Russell Kingb1b3f492012-10-06 17:12:25 +0100545 select MULTI_IRQ_HANDLER
Eric Miaobd5ce432009-01-20 12:06:01 +0800546 select PLAT_PXA
Haojian Zhuang6ac6b812010-08-20 15:23:59 +0800547 select SPARSE_IRQ
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000548 help
eric miao2c8086a2007-09-11 19:13:17 -0700549 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550
551config ARCH_RPC
552 bool "RiscPC"
Russell King868e87c2015-09-28 10:31:50 +0100553 depends on MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 select ARCH_ACORN
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100555 select ARCH_MAY_HAVE_PC_FDC
Russell King07f841b2008-10-01 17:11:06 +0100556 select ARCH_SPARSEMEM_ENABLE
John Stultz5cfc8ee2010-03-24 00:22:36 +0000557 select ARCH_USES_GETTIMEOFFSET
Arnd Bergmannfa04e202014-02-26 17:39:12 +0100558 select CPU_SA110
Russell Kingb1b3f492012-10-06 17:12:25 +0100559 select FIQ
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200560 select HAVE_IDE
Russell Kingb1b3f492012-10-06 17:12:25 +0100561 select HAVE_PATA_PLATFORM
562 select ISA_DMA_API
Rob Herringc334bc12012-03-04 22:03:33 -0600563 select NEED_MACH_IO_H
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400564 select NEED_MACH_MEMORY_H
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700565 select NO_IOPORT_MAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 help
567 On the Acorn Risc-PC, Linux can support the internal IDE disk and
568 CD-ROM interface, serial and parallel port, and the floppy drive.
569
570config ARCH_SA1100
571 bool "SA1100-based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100572 select ARCH_MTD_XIP
Russell Kingb1b3f492012-10-06 17:12:25 +0100573 select ARCH_SPARSEMEM_ENABLE
574 select CLKDEV_LOOKUP
575 select CLKSRC_MMIO
Daniel Lezcano389d9b52015-10-09 15:48:38 +0200576 select CLKSRC_PXA
577 select CLKSRC_OF if OF
Russell Kingb1b3f492012-10-06 17:12:25 +0100578 select CPU_FREQ
579 select CPU_SA1100
580 select GENERIC_CLOCKEVENTS
Linus Walleij5c34a4e2016-06-02 14:10:16 +0200581 select GPIOLIB
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200582 select HAVE_IDE
Dmitry Eremin-Solenikov1eca42b2014-11-28 15:56:54 +0100583 select IRQ_DOMAIN
Russell Kingb1b3f492012-10-06 17:12:25 +0100584 select ISA
Dmitry Eremin-Solenikovaffcab32014-11-28 15:55:16 +0100585 select MULTI_IRQ_HANDLER
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400586 select NEED_MACH_MEMORY_H
Russell King375dec92012-02-23 14:29:33 +0100587 select SPARSE_IRQ
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000588 help
589 Support for StrongARM 11x0 based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900591config ARCH_S3C24XX
592 bool "Samsung S3C24XX SoCs"
Arnd Bergmann335cce72014-03-13 14:11:16 +0100593 select ATAGS
Russell Kingb1b3f492012-10-06 17:12:25 +0100594 select CLKDEV_LOOKUP
Tomasz Figa42805062013-04-28 02:25:01 +0200595 select CLKSRC_SAMSUNG_PWM
Romain Naour7f78b6e2013-01-09 18:47:04 -0800596 select GENERIC_CLOCKEVENTS
Tomasz Figa880cf072013-06-19 01:22:20 +0900597 select GPIO_SAMSUNG
Linus Walleij5c34a4e2016-06-02 14:10:16 +0200598 select GPIOLIB
Kukjin Kim20676c12010-11-13 16:08:32 +0900599 select HAVE_S3C2410_I2C if I2C
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900600 select HAVE_S3C2410_WATCHDOG if WATCHDOG
Russell Kingb1b3f492012-10-06 17:12:25 +0100601 select HAVE_S3C_RTC if RTC_CLASS
Heiko Stuebner17453dd2013-03-07 12:38:25 +0900602 select MULTI_IRQ_HANDLER
Rob Herringc334bc12012-03-04 22:03:33 -0600603 select NEED_MACH_IO_H
Tomasz Figacd8dc7a2013-06-15 09:01:49 +0900604 select SAMSUNG_ATAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 help
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900606 Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
607 and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
608 (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
609 Samsung SMDK2410 development board (and derivatives).
Ben Dooks63b1f512010-04-30 16:32:26 +0900610
Kevin Hilman7c6337e2007-04-30 19:37:19 +0100611config ARCH_DAVINCI
612 bool "TI DaVinci"
Russell Kingb1b3f492012-10-06 17:12:25 +0100613 select ARCH_HAS_HOLES_MEMORYMODEL
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100614 select CLKDEV_LOOKUP
Arnd Bergmannce32c5c2016-02-01 21:35:57 +0100615 select CPU_ARM926T
David Brownell20e99692009-05-07 09:31:42 -0700616 select GENERIC_ALLOCATOR
Russell Kingb1b3f492012-10-06 17:12:25 +0100617 select GENERIC_CLOCKEVENTS
Russell Kingdc7ad3b2011-05-22 10:01:21 +0100618 select GENERIC_IRQ_CHIP
Linus Walleij5c34a4e2016-06-02 14:10:16 +0200619 select GPIOLIB
Russell Kingb1b3f492012-10-06 17:12:25 +0100620 select HAVE_IDE
Sekhar Nori689e3312012-08-28 15:27:52 +0530621 select USE_OF
Russell Kingb1b3f492012-10-06 17:12:25 +0100622 select ZONE_DMA
Kevin Hilman7c6337e2007-04-30 19:37:19 +0100623 help
624 Support for TI's DaVinci platform.
625
Tony Lindgrena0694862013-01-11 11:24:20 -0800626config ARCH_OMAP1
627 bool "TI OMAP1"
Arnd Bergmann00a36692012-06-07 18:50:51 -0600628 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100629 select ARCH_HAS_HOLES_MEMORYMODEL
Tony Lindgrena0694862013-01-11 11:24:20 -0800630 select ARCH_OMAP
Tony Priske9a91de2012-08-03 21:00:06 +1200631 select CLKDEV_LOOKUP
viresh kumarcee37e52010-04-01 12:31:05 +0100632 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100633 select GENERIC_CLOCKEVENTS
Tony Lindgrena0694862013-01-11 11:24:20 -0800634 select GENERIC_IRQ_CHIP
Linus Walleij5c34a4e2016-06-02 14:10:16 +0200635 select GPIOLIB
Tony Lindgrena0694862013-01-11 11:24:20 -0800636 select HAVE_IDE
637 select IRQ_DOMAIN
Tony Lindgrenb6943312015-05-20 09:01:21 -0700638 select MULTI_IRQ_HANDLER
Tony Lindgrena0694862013-01-11 11:24:20 -0800639 select NEED_MACH_IO_H if PCCARD
640 select NEED_MACH_MEMORY_H
Tony Lindgren685e2d02015-05-20 09:01:21 -0700641 select SPARSE_IRQ
Alexey Charkov21f47fb2010-12-23 13:11:21 +0100642 help
Tony Lindgrena0694862013-01-11 11:24:20 -0800643 Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
Binghua Duan02c981c2011-07-08 17:40:12 +0800644
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645endchoice
646
Rob Herring387798b2012-09-06 13:41:12 -0500647menu "Multiple platform selection"
648 depends on ARCH_MULTIPLATFORM
649
650comment "CPU Core family selection"
651
Arnd Bergmannf8afae42014-03-25 22:19:00 +0100652config ARCH_MULTI_V4
653 bool "ARMv4 based platforms (FA526)"
654 depends on !ARCH_MULTI_V6_V7
655 select ARCH_MULTI_V4_V5
656 select CPU_FA526
657
Rob Herring387798b2012-09-06 13:41:12 -0500658config ARCH_MULTI_V4T
659 bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
Rob Herring387798b2012-09-06 13:41:12 -0500660 depends on !ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100661 select ARCH_MULTI_V4_V5
Arnd Bergmann24e860f2013-06-03 15:38:58 +0200662 select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
663 CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
664 CPU_ARM925T || CPU_ARM940T)
Rob Herring387798b2012-09-06 13:41:12 -0500665
666config ARCH_MULTI_V5
667 bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
Rob Herring387798b2012-09-06 13:41:12 -0500668 depends on !ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100669 select ARCH_MULTI_V4_V5
Andrew Lunn12567bb2014-02-22 20:14:54 +0100670 select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \
Arnd Bergmann24e860f2013-06-03 15:38:58 +0200671 CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
672 CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
Rob Herring387798b2012-09-06 13:41:12 -0500673
674config ARCH_MULTI_V4_V5
675 bool
676
677config ARCH_MULTI_V6
Stephen Boyd8dda05c2013-03-04 15:19:19 -0800678 bool "ARMv6 based platforms (ARM11)"
Rob Herring387798b2012-09-06 13:41:12 -0500679 select ARCH_MULTI_V6_V7
Rob Herring42f47542014-01-31 14:26:04 -0600680 select CPU_V6K
Rob Herring387798b2012-09-06 13:41:12 -0500681
682config ARCH_MULTI_V7
Stephen Boyd8dda05c2013-03-04 15:19:19 -0800683 bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
Rob Herring387798b2012-09-06 13:41:12 -0500684 default y
685 select ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100686 select CPU_V7
Rob Herring90bc8ac2014-01-31 15:32:02 -0600687 select HAVE_SMP
Rob Herring387798b2012-09-06 13:41:12 -0500688
689config ARCH_MULTI_V6_V7
690 bool
Rob Herring9352b052014-01-31 15:36:10 -0600691 select MIGHT_HAVE_CACHE_L2X0
Rob Herring387798b2012-09-06 13:41:12 -0500692
693config ARCH_MULTI_CPU_AUTO
694 def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
695 select ARCH_MULTI_V5
696
697endmenu
698
Rob Herring05e2a3d2013-12-05 10:04:54 -0600699config ARCH_VIRT
Masahiro Yamadae3246542015-11-16 12:06:10 +0900700 bool "Dummy Virtual Machine"
701 depends on ARCH_MULTI_V7
Rob Herring4b8b5f22013-12-05 10:10:34 -0600702 select ARM_AMBA
Rob Herring05e2a3d2013-12-05 10:04:54 -0600703 select ARM_GIC
Arnd Bergmann3ee80362016-06-15 15:47:33 -0500704 select ARM_GIC_V2M if PCI
Jean-Philippe Brucker0b28f1d2015-10-01 13:47:18 +0100705 select ARM_GIC_V3
Rob Herring05e2a3d2013-12-05 10:04:54 -0600706 select ARM_PSCI
Rob Herring4b8b5f22013-12-05 10:10:34 -0600707 select HAVE_ARM_ARCH_TIMER
Rob Herring05e2a3d2013-12-05 10:04:54 -0600708
Russell Kingccf50e22010-03-15 19:03:06 +0000709#
710# This is sorted alphabetically by mach-* pathname. However, plat-*
711# Kconfigs may be included either alphabetically (according to the
712# plat- suffix) or along side the corresponding mach-* source.
713#
Gregory CLEMENT3e93a222012-06-04 18:38:56 +0200714source "arch/arm/mach-mvebu/Kconfig"
715
Tsahee Zidenberg445d9b32015-03-12 13:53:00 +0200716source "arch/arm/mach-alpine/Kconfig"
717
Lars Persson590b4602016-02-11 17:06:19 +0100718source "arch/arm/mach-artpec/Kconfig"
719
Oleksij Rempeld9bfc862014-11-24 12:08:27 +0100720source "arch/arm/mach-asm9260/Kconfig"
721
Russell King95b8f202010-01-14 11:43:54 +0000722source "arch/arm/mach-at91/Kconfig"
723
Anders Berg1d22924e2014-05-23 11:08:35 +0200724source "arch/arm/mach-axxia/Kconfig"
725
Christian Daudt8ac49e02012-11-19 09:46:10 -0800726source "arch/arm/mach-bcm/Kconfig"
727
Sebastian Hesselbarth1c37fa12013-09-09 14:36:19 +0200728source "arch/arm/mach-berlin/Kconfig"
729
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730source "arch/arm/mach-clps711x/Kconfig"
731
Anton Vorontsovd94f9442010-03-25 17:12:41 +0300732source "arch/arm/mach-cns3xxx/Kconfig"
733
Russell King95b8f202010-01-14 11:43:54 +0000734source "arch/arm/mach-davinci/Kconfig"
735
Baruch Siachdf8d7422015-01-14 10:40:30 +0200736source "arch/arm/mach-digicolor/Kconfig"
737
Russell King95b8f202010-01-14 11:43:54 +0000738source "arch/arm/mach-dove/Kconfig"
739
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000740source "arch/arm/mach-ep93xx/Kconfig"
741
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742source "arch/arm/mach-footbridge/Kconfig"
743
Paulius Zaleckas59d3a192009-03-26 10:06:08 +0200744source "arch/arm/mach-gemini/Kconfig"
745
Rob Herring387798b2012-09-06 13:41:12 -0500746source "arch/arm/mach-highbank/Kconfig"
747
Haojian Zhuang389ee0c2013-12-20 10:52:56 +0800748source "arch/arm/mach-hisi/Kconfig"
749
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750source "arch/arm/mach-integrator/Kconfig"
751
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100752source "arch/arm/mach-iop32x/Kconfig"
753
754source "arch/arm/mach-iop33x/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755
Dan Williams285f5fa2006-12-07 02:59:39 +0100756source "arch/arm/mach-iop13xx/Kconfig"
757
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758source "arch/arm/mach-ixp4xx/Kconfig"
759
Santosh Shilimkar828989a2013-06-10 11:27:13 -0400760source "arch/arm/mach-keystone/Kconfig"
761
Russell King95b8f202010-01-14 11:43:54 +0000762source "arch/arm/mach-ks8695/Kconfig"
763
Carlo Caione3b8f5032014-09-10 22:16:59 +0200764source "arch/arm/mach-meson/Kconfig"
765
Jonas Jensen17723fd32013-12-18 13:58:45 +0100766source "arch/arm/mach-moxart/Kconfig"
767
Joel Stanley8c2ed9b2016-03-21 17:22:31 +1030768source "arch/arm/mach-aspeed/Kconfig"
769
Stanislav Samsonov794d15b2008-06-22 22:45:10 +0200770source "arch/arm/mach-mv78xx0/Kconfig"
771
Shawn Guo3995eb82012-09-13 19:48:07 +0800772source "arch/arm/mach-imx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773
Matthias Bruggerf682a212014-05-13 01:06:13 +0200774source "arch/arm/mach-mediatek/Kconfig"
775
Shawn Guo1d3f33d2010-12-13 20:55:03 +0800776source "arch/arm/mach-mxs/Kconfig"
777
Russell King95b8f202010-01-14 11:43:54 +0000778source "arch/arm/mach-netx/Kconfig"
Eric Miao49cbe782009-01-20 14:15:18 +0800779
Russell King95b8f202010-01-14 11:43:54 +0000780source "arch/arm/mach-nomadik/Kconfig"
Russell King95b8f202010-01-14 11:43:54 +0000781
Daniel Tang9851ca52013-06-11 18:40:17 +1000782source "arch/arm/mach-nspire/Kconfig"
783
Tony Lindgrend48af152005-07-10 19:58:17 +0100784source "arch/arm/plat-omap/Kconfig"
785
786source "arch/arm/mach-omap1/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787
Tony Lindgren1dbae812005-11-10 14:26:51 +0000788source "arch/arm/mach-omap2/Kconfig"
789
Lennert Buytenhek9dd0b192008-03-27 14:51:41 -0400790source "arch/arm/mach-orion5x/Kconfig"
Tzachi Perelstein585cf172007-10-23 15:14:41 -0400791
Rob Herring387798b2012-09-06 13:41:12 -0500792source "arch/arm/mach-picoxcell/Kconfig"
793
Russell King95b8f202010-01-14 11:43:54 +0000794source "arch/arm/mach-pxa/Kconfig"
795source "arch/arm/plat-pxa/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796
Russell King95b8f202010-01-14 11:43:54 +0000797source "arch/arm/mach-mmp/Kconfig"
798
Neil Armstrong8c9184b2016-03-03 10:42:15 +0100799source "arch/arm/mach-oxnas/Kconfig"
800
Kumar Gala8fc1b0f2014-01-21 17:14:10 -0600801source "arch/arm/mach-qcom/Kconfig"
802
Russell King95b8f202010-01-14 11:43:54 +0000803source "arch/arm/mach-realview/Kconfig"
804
Heiko Stuebnerd63dc052013-06-02 23:09:41 +0200805source "arch/arm/mach-rockchip/Kconfig"
806
Russell King95b8f202010-01-14 11:43:54 +0000807source "arch/arm/mach-sa1100/Kconfig"
Saeed Bisharaedabd382009-08-06 15:12:43 +0300808
Rob Herring387798b2012-09-06 13:41:12 -0500809source "arch/arm/mach-socfpga/Kconfig"
810
Arnd Bergmanna7ed0992012-12-02 15:12:47 +0100811source "arch/arm/mach-spear/Kconfig"
Ben Dooksa21765a2007-02-11 18:31:01 +0100812
Srinivas Kandagatla65ebcc12013-06-25 12:15:10 +0100813source "arch/arm/mach-sti/Kconfig"
814
Kukjin Kim85fd6d62012-02-06 09:38:19 +0900815source "arch/arm/mach-s3c24xx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816
Ben Dooks431107e2010-01-26 10:11:04 +0900817source "arch/arm/mach-s3c64xx/Kconfig"
Ben Dooksa08ab632008-10-21 14:06:39 +0100818
Kukjin Kim170f4e42010-02-24 16:40:44 +0900819source "arch/arm/mach-s5pv210/Kconfig"
820
Kukjin Kim83014572011-11-06 13:54:56 +0900821source "arch/arm/mach-exynos/Kconfig"
Rob Herringe509b282014-06-10 09:06:09 -0500822source "arch/arm/plat-samsung/Kconfig"
Changhwan Youncc0e72b2010-07-16 12:15:38 +0900823
Russell King882d01f2010-03-02 23:40:15 +0000824source "arch/arm/mach-shmobile/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825
Maxime Ripard3b526342012-11-08 12:40:16 +0100826source "arch/arm/mach-sunxi/Kconfig"
827
Barry Song156a0992012-08-23 13:41:58 +0800828source "arch/arm/mach-prima2/Kconfig"
829
Marc Gonzalezd6de5b02015-12-15 10:41:13 +0100830source "arch/arm/mach-tango/Kconfig"
831
Erik Gillingc5f80062010-01-21 16:53:02 -0800832source "arch/arm/mach-tegra/Kconfig"
833
Russell King95b8f202010-01-14 11:43:54 +0000834source "arch/arm/mach-u300/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835
Masahiro Yamadaba56a982015-05-08 13:07:11 +0900836source "arch/arm/mach-uniphier/Kconfig"
837
Russell King95b8f202010-01-14 11:43:54 +0000838source "arch/arm/mach-ux500/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839
840source "arch/arm/mach-versatile/Kconfig"
841
Russell Kingceade892010-02-11 21:44:53 +0000842source "arch/arm/mach-vexpress/Kconfig"
Russell King420c34e2011-01-18 20:08:06 +0000843source "arch/arm/plat-versatile/Kconfig"
Russell Kingceade892010-02-11 21:44:53 +0000844
Tony Prisk6f35f9a2012-10-11 20:13:09 +1300845source "arch/arm/mach-vt8500/Kconfig"
846
wanzongshun7ec80dd2008-12-03 03:55:38 +0100847source "arch/arm/mach-w90x900/Kconfig"
848
Jun Nieacede512015-04-28 17:18:05 +0800849source "arch/arm/mach-zx/Kconfig"
850
Josh Cartwright9a45eb62012-11-19 11:38:29 -0600851source "arch/arm/mach-zynq/Kconfig"
852
Stefan Agner499f1642015-05-21 00:35:44 +0200853# ARMv7-M architecture
854config ARCH_EFM32
855 bool "Energy Micro efm32"
856 depends on ARM_SINGLE_ARMV7M
Linus Walleij5c34a4e2016-06-02 14:10:16 +0200857 select GPIOLIB
Stefan Agner499f1642015-05-21 00:35:44 +0200858 help
859 Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko
860 processors.
861
862config ARCH_LPC18XX
863 bool "NXP LPC18xx/LPC43xx"
864 depends on ARM_SINGLE_ARMV7M
865 select ARCH_HAS_RESET_CONTROLLER
866 select ARM_AMBA
867 select CLKSRC_LPC32XX
868 select PINCTRL
869 help
870 Support for NXP's LPC18xx Cortex-M3 and LPC43xx Cortex-M4
871 high performance microcontrollers.
872
873config ARCH_STM32
874 bool "STMicrolectronics STM32"
875 depends on ARM_SINGLE_ARMV7M
876 select ARCH_HAS_RESET_CONTROLLER
877 select ARMV7M_SYSTICK
Maxime Coquelin25263182015-05-22 23:50:52 +0200878 select CLKSRC_STM32
Maxime Coquelinf64e9802015-10-14 18:32:42 +0200879 select PINCTRL
Stefan Agner499f1642015-05-21 00:35:44 +0200880 select RESET_CONTROLLER
Alexandre TORGUE47f91512016-09-20 18:00:58 +0200881 select STM32_EXTI
Stefan Agner499f1642015-05-21 00:35:44 +0200882 help
883 Support for STMicroelectronics STM32 processors.
884
Maxime Coquelinfa65fc62015-10-14 18:21:32 +0200885config MACH_STM32F429
886 bool "STMicrolectronics STM32F429"
887 depends on ARCH_STM32
888 default y
889
Vladimir Murzin18471192016-04-25 09:49:13 +0100890config ARCH_MPS2
Baruch Siach17bd2742016-07-17 11:35:29 +0300891 bool "ARM MPS2 platform"
Vladimir Murzin18471192016-04-25 09:49:13 +0100892 depends on ARM_SINGLE_ARMV7M
893 select ARM_AMBA
894 select CLKSRC_MPS2
895 help
896 Support for Cortex-M Prototyping System (or V2M-MPS2) which comes
897 with a range of available cores like Cortex-M3/M4/M7.
898
899 Please, note that depends which Application Note is used memory map
900 for the platform may vary, so adjustment of RAM base might be needed.
901
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902# Definitions to make life easier
903config ARCH_ACORN
904 bool
905
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100906config PLAT_IOP
907 bool
Mikael Pettersson469d30442009-10-29 11:46:54 -0700908 select GENERIC_CLOCKEVENTS
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100909
Lennert Buytenhek69b02f62008-03-27 14:51:39 -0400910config PLAT_ORION
911 bool
Russell Kingbfe45e02011-05-08 15:33:30 +0100912 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100913 select COMMON_CLK
Russell Kingdc7ad3b2011-05-22 10:01:21 +0100914 select GENERIC_IRQ_CHIP
Andrew Lunn278b45b2012-06-27 13:40:04 +0200915 select IRQ_DOMAIN
Lennert Buytenhek69b02f62008-03-27 14:51:39 -0400916
Thomas Petazzoniabcda1d2012-09-11 14:27:27 +0200917config PLAT_ORION_LEGACY
918 bool
919 select PLAT_ORION
920
Eric Miaobd5ce432009-01-20 12:06:01 +0800921config PLAT_PXA
922 bool
923
Russell Kingf4b8b312010-01-14 12:48:06 +0000924config PLAT_VERSATILE
925 bool
926
Alexandre Courbotd9a1bea2013-11-24 15:30:46 +0900927source "arch/arm/firmware/Kconfig"
928
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929source arch/arm/mm/Kconfig
930
Lennert Buytenhekafe4b252006-12-03 18:51:14 +0100931config IWMMXT
Sebastian Hesselbarthd93003e2014-04-24 22:58:30 +0100932 bool "Enable iWMMXt support"
933 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B
934 default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B
Lennert Buytenhekafe4b252006-12-03 18:51:14 +0100935 help
936 Enable support for iWMMXt context switching at run time if
937 running on a CPU that supports it.
938
eric miao52108642010-12-13 09:42:34 +0100939config MULTI_IRQ_HANDLER
940 bool
941 help
942 Allow each machine to specify it's own IRQ handler at run time.
943
Hyok S. Choi3b93e7b2006-06-22 11:48:56 +0100944if !MMU
945source "arch/arm/Kconfig-nommu"
946endif
947
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100948config PJ4B_ERRATA_4742
949 bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
950 depends on CPU_PJ4B && MACH_ARMADA_370
951 default y
952 help
953 When coming out of either a Wait for Interrupt (WFI) or a Wait for
954 Event (WFE) IDLE states, a specific timing sensitivity exists between
955 the retiring WFI/WFE instructions and the newly issued subsequent
956 instructions. This sensitivity can result in a CPU hang scenario.
957 Workaround:
958 The software must insert either a Data Synchronization Barrier (DSB)
959 or Data Memory Barrier (DMB) command immediately after the WFI/WFE
960 instruction
961
Will Deaconf0c4b8d2012-04-20 17:20:08 +0100962config ARM_ERRATA_326103
963 bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
964 depends on CPU_V6
965 help
966 Executing a SWP instruction to read-only memory does not set bit 11
967 of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
968 treat the access as a read, preventing a COW from occurring and
969 causing the faulting task to livelock.
970
Catalin Marinas9cba3cc2009-04-30 17:06:03 +0100971config ARM_ERRATA_411920
972 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
Russell Kinge399b1a2011-01-17 15:08:32 +0000973 depends on CPU_V6 || CPU_V6K
Catalin Marinas9cba3cc2009-04-30 17:06:03 +0100974 help
975 Invalidation of the Instruction Cache operation can
976 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
977 It does not affect the MPCore. This option enables the ARM Ltd.
978 recommended workaround.
979
Catalin Marinas7ce236f2009-04-30 17:06:09 +0100980config ARM_ERRATA_430973
981 bool "ARM errata: Stale prediction on replaced interworking branch"
982 depends on CPU_V7
983 help
984 This option enables the workaround for the 430973 Cortex-A8
Russell King79403cd2015-04-13 16:14:37 +0100985 r1p* erratum. If a code sequence containing an ARM/Thumb
Catalin Marinas7ce236f2009-04-30 17:06:09 +0100986 interworking branch is replaced with another code sequence at the
987 same virtual address, whether due to self-modifying code or virtual
988 to physical address re-mapping, Cortex-A8 does not recover from the
989 stale interworking branch prediction. This results in Cortex-A8
990 executing the new code sequence in the incorrect ARM or Thumb state.
991 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
992 and also flushes the branch target cache at every context switch.
993 Note that setting specific bits in the ACTLR register may not be
994 available in non-secure mode.
995
Catalin Marinas855c5512009-04-30 17:06:15 +0100996config ARM_ERRATA_458693
997 bool "ARM errata: Processor deadlock when a false hazard is created"
998 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +0100999 depends on !ARCH_MULTIPLATFORM
Catalin Marinas855c5512009-04-30 17:06:15 +01001000 help
1001 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1002 erratum. For very specific sequences of memory operations, it is
1003 possible for a hazard condition intended for a cache line to instead
1004 be incorrectly associated with a different cache line. This false
1005 hazard might then cause a processor deadlock. The workaround enables
1006 the L1 caching of the NEON accesses and disables the PLD instruction
1007 in the ACTLR register. Note that setting specific bits in the ACTLR
1008 register may not be available in non-secure mode.
1009
Catalin Marinas0516e462009-04-30 17:06:20 +01001010config ARM_ERRATA_460075
1011 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1012 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001013 depends on !ARCH_MULTIPLATFORM
Catalin Marinas0516e462009-04-30 17:06:20 +01001014 help
1015 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1016 erratum. Any asynchronous access to the L2 cache may encounter a
1017 situation in which recent store transactions to the L2 cache are lost
1018 and overwritten with stale memory contents from external memory. The
1019 workaround disables the write-allocate mode for the L2 cache via the
1020 ACTLR register. Note that setting specific bits in the ACTLR register
1021 may not be available in non-secure mode.
1022
Will Deacon9f050272010-09-14 09:51:43 +01001023config ARM_ERRATA_742230
1024 bool "ARM errata: DMB operation may be faulty"
1025 depends on CPU_V7 && SMP
Rob Herring62e4d352012-12-21 22:42:40 +01001026 depends on !ARCH_MULTIPLATFORM
Will Deacon9f050272010-09-14 09:51:43 +01001027 help
1028 This option enables the workaround for the 742230 Cortex-A9
1029 (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1030 between two write operations may not ensure the correct visibility
1031 ordering of the two writes. This workaround sets a specific bit in
1032 the diagnostic register of the Cortex-A9 which causes the DMB
1033 instruction to behave as a DSB, ensuring the correct behaviour of
1034 the two writes.
1035
Will Deacona672e992010-09-14 09:53:02 +01001036config ARM_ERRATA_742231
1037 bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1038 depends on CPU_V7 && SMP
Rob Herring62e4d352012-12-21 22:42:40 +01001039 depends on !ARCH_MULTIPLATFORM
Will Deacona672e992010-09-14 09:53:02 +01001040 help
1041 This option enables the workaround for the 742231 Cortex-A9
1042 (r2p0..r2p2) erratum. Under certain conditions, specific to the
1043 Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1044 accessing some data located in the same cache line, may get corrupted
1045 data due to bad handling of the address hazard when the line gets
1046 replaced from one of the CPUs at the same time as another CPU is
1047 accessing it. This workaround sets specific bits in the diagnostic
1048 register of the Cortex-A9 which reduces the linefill issuing
1049 capabilities of the processor.
1050
Jon Medhurst69155792013-06-07 10:35:35 +01001051config ARM_ERRATA_643719
1052 bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
1053 depends on CPU_V7 && SMP
Russell Kinge5a5de42015-04-02 23:58:55 +01001054 default y
Jon Medhurst69155792013-06-07 10:35:35 +01001055 help
1056 This option enables the workaround for the 643719 Cortex-A9 (prior to
1057 r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
1058 register returns zero when it should return one. The workaround
1059 corrects this value, ensuring cache maintenance operations which use
1060 it behave as intended and avoiding data corruption.
1061
Will Deaconcdf357f2010-08-05 11:20:51 +01001062config ARM_ERRATA_720789
1063 bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
Dave Martine66dc742011-12-08 13:37:46 +01001064 depends on CPU_V7
Will Deaconcdf357f2010-08-05 11:20:51 +01001065 help
1066 This option enables the workaround for the 720789 Cortex-A9 (prior to
1067 r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1068 broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1069 As a consequence of this erratum, some TLB entries which should be
1070 invalidated are not, resulting in an incoherency in the system page
1071 tables. The workaround changes the TLB flushing routines to invalidate
1072 entries regardless of the ASID.
Will Deacon475d92f2010-09-28 14:02:02 +01001073
1074config ARM_ERRATA_743622
1075 bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1076 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001077 depends on !ARCH_MULTIPLATFORM
Will Deacon475d92f2010-09-28 14:02:02 +01001078 help
1079 This option enables the workaround for the 743622 Cortex-A9
Will Deaconefbc74a2012-02-24 12:12:38 +01001080 (r2p*) erratum. Under very rare conditions, a faulty
Will Deacon475d92f2010-09-28 14:02:02 +01001081 optimisation in the Cortex-A9 Store Buffer may lead to data
1082 corruption. This workaround sets a specific bit in the diagnostic
1083 register of the Cortex-A9 which disables the Store Buffer
1084 optimisation, preventing the defect from occurring. This has no
1085 visible impact on the overall performance or power consumption of the
1086 processor.
1087
Will Deacon9a27c272011-02-18 16:36:35 +01001088config ARM_ERRATA_751472
1089 bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
Dave Martinba90c512011-12-08 13:41:06 +01001090 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001091 depends on !ARCH_MULTIPLATFORM
Will Deacon9a27c272011-02-18 16:36:35 +01001092 help
1093 This option enables the workaround for the 751472 Cortex-A9 (prior
1094 to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1095 completion of a following broadcasted operation if the second
1096 operation is received by a CPU before the ICIALLUIS has completed,
1097 potentially leading to corrupted entries in the cache or TLB.
1098
Will Deaconfcbdc5fe2011-02-28 18:15:16 +01001099config ARM_ERRATA_754322
1100 bool "ARM errata: possible faulty MMU translations following an ASID switch"
1101 depends on CPU_V7
1102 help
1103 This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1104 r3p*) erratum. A speculative memory access may cause a page table walk
1105 which starts prior to an ASID switch but completes afterwards. This
1106 can populate the micro-TLB with a stale entry which may be hit with
1107 the new ASID. This workaround places two dsb instructions in the mm
1108 switching code so that no page table walks can cross the ASID switch.
1109
Will Deacon5dab26af2011-03-04 12:38:54 +01001110config ARM_ERRATA_754327
1111 bool "ARM errata: no automatic Store Buffer drain"
1112 depends on CPU_V7 && SMP
1113 help
1114 This option enables the workaround for the 754327 Cortex-A9 (prior to
1115 r2p0) erratum. The Store Buffer does not have any automatic draining
1116 mechanism and therefore a livelock may occur if an external agent
1117 continuously polls a memory location waiting to observe an update.
1118 This workaround defines cpu_relax() as smp_mb(), preventing correctly
1119 written polling loops from denying visibility of updates to memory.
1120
Catalin Marinas145e10e2011-08-15 11:04:41 +01001121config ARM_ERRATA_364296
1122 bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
Fabio Estevamfd832472013-07-09 18:34:01 +01001123 depends on CPU_V6
Catalin Marinas145e10e2011-08-15 11:04:41 +01001124 help
1125 This options enables the workaround for the 364296 ARM1136
1126 r0p2 erratum (possible cache data corruption with
1127 hit-under-miss enabled). It sets the undocumented bit 31 in
1128 the auxiliary control register and the FI bit in the control
1129 register, thus disabling hit-under-miss without putting the
1130 processor into full low interrupt latency mode. ARM11MPCore
1131 is not affected.
1132
Will Deaconf630c1b2011-09-15 11:45:15 +01001133config ARM_ERRATA_764369
1134 bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1135 depends on CPU_V7 && SMP
1136 help
1137 This option enables the workaround for erratum 764369
1138 affecting Cortex-A9 MPCore with two or more processors (all
1139 current revisions). Under certain timing circumstances, a data
1140 cache line maintenance operation by MVA targeting an Inner
1141 Shareable memory region may fail to proceed up to either the
1142 Point of Coherency or to the Point of Unification of the
1143 system. This workaround adds a DSB instruction before the
1144 relevant cache maintenance functions and sets a specific bit
1145 in the diagnostic control register of the SCU.
1146
Simon Horman7253b852012-09-28 02:12:45 +01001147config ARM_ERRATA_775420
1148 bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
1149 depends on CPU_V7
1150 help
1151 This option enables the workaround for the 775420 Cortex-A9 (r2p2,
1152 r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
1153 operation aborts with MMU exception, it might cause the processor
1154 to deadlock. This workaround puts DSB before executing ISB if
1155 an abort may occur on cache maintenance.
1156
Catalin Marinas93dc6882013-03-26 23:35:04 +01001157config ARM_ERRATA_798181
1158 bool "ARM errata: TLBI/DSB failure on Cortex-A15"
1159 depends on CPU_V7 && SMP
1160 help
1161 On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
1162 adequately shooting down all use of the old entries. This
1163 option enables the Linux kernel workaround for this erratum
1164 which sends an IPI to the CPUs that are running the same ASID
1165 as the one being invalidated.
1166
Will Deacon84b65042013-08-20 17:29:55 +01001167config ARM_ERRATA_773022
1168 bool "ARM errata: incorrect instructions may be executed from loop buffer"
1169 depends on CPU_V7
1170 help
1171 This option enables the workaround for the 773022 Cortex-A15
1172 (up to r0p4) erratum. In certain rare sequences of code, the
1173 loop buffer may deliver incorrect instructions. This
1174 workaround disables the loop buffer to avoid the erratum.
1175
Doug Anderson62c0f4a2016-04-07 00:25:00 +01001176config ARM_ERRATA_818325_852422
1177 bool "ARM errata: A12: some seqs of opposed cond code instrs => deadlock or corruption"
1178 depends on CPU_V7
1179 help
1180 This option enables the workaround for:
1181 - Cortex-A12 818325: Execution of an UNPREDICTABLE STR or STM
1182 instruction might deadlock. Fixed in r0p1.
1183 - Cortex-A12 852422: Execution of a sequence of instructions might
1184 lead to either a data corruption or a CPU deadlock. Not fixed in
1185 any Cortex-A12 cores yet.
1186 This workaround for all both errata involves setting bit[12] of the
1187 Feature Register. This bit disables an optimisation applied to a
1188 sequence of 2 instructions that use opposing condition codes.
1189
Doug Anderson416bcf22016-04-07 00:26:05 +01001190config ARM_ERRATA_821420
1191 bool "ARM errata: A12: sequence of VMOV to core registers might lead to a dead lock"
1192 depends on CPU_V7
1193 help
1194 This option enables the workaround for the 821420 Cortex-A12
1195 (all revs) erratum. In very rare timing conditions, a sequence
1196 of VMOV to Core registers instructions, for which the second
1197 one is in the shadow of a branch or abort, can lead to a
1198 deadlock when the VMOV instructions are issued out-of-order.
1199
Doug Anderson9f6f9352016-04-07 00:27:26 +01001200config ARM_ERRATA_825619
1201 bool "ARM errata: A12: DMB NSHST/ISHST mixed ... might cause deadlock"
1202 depends on CPU_V7
1203 help
1204 This option enables the workaround for the 825619 Cortex-A12
1205 (all revs) erratum. Within rare timing constraints, executing a
1206 DMB NSHST or DMB ISHST instruction followed by a mix of Cacheable
1207 and Device/Strongly-Ordered loads and stores might cause deadlock
1208
1209config ARM_ERRATA_852421
1210 bool "ARM errata: A17: DMB ST might fail to create order between stores"
1211 depends on CPU_V7
1212 help
1213 This option enables the workaround for the 852421 Cortex-A17
1214 (r1p0, r1p1, r1p2) erratum. Under very rare timing conditions,
1215 execution of a DMB ST instruction might fail to properly order
1216 stores from GroupA and stores from GroupB.
1217
Doug Anderson62c0f4a2016-04-07 00:25:00 +01001218config ARM_ERRATA_852423
1219 bool "ARM errata: A17: some seqs of opposed cond code instrs => deadlock or corruption"
1220 depends on CPU_V7
1221 help
1222 This option enables the workaround for:
1223 - Cortex-A17 852423: Execution of a sequence of instructions might
1224 lead to either a data corruption or a CPU deadlock. Not fixed in
1225 any Cortex-A17 cores yet.
1226 This is identical to Cortex-A12 erratum 852422. It is a separate
1227 config option from the A12 erratum due to the way errata are checked
1228 for and handled.
1229
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230endmenu
1231
1232source "arch/arm/common/Kconfig"
1233
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234menu "Bus support"
1235
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236config ISA
1237 bool
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 help
1239 Find out whether you have ISA slots on your motherboard. ISA is the
1240 name of a bus system, i.e. the way the CPU talks to the other stuff
1241 inside your box. Other bus systems are PCI, EISA, MicroChannel
1242 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1243 newer boards don't support it. If you have ISA, say Y, otherwise N.
1244
Russell King065909b2006-01-04 15:44:16 +00001245# Select ISA DMA controller support
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246config ISA_DMA
1247 bool
Russell King065909b2006-01-04 15:44:16 +00001248 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249
Russell King065909b2006-01-04 15:44:16 +00001250# Select ISA DMA interface
Al Viro5cae8412005-05-04 05:39:22 +01001251config ISA_DMA_API
1252 bool
Al Viro5cae8412005-05-04 05:39:22 +01001253
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254config PCI
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +01001255 bool "PCI support" if MIGHT_HAVE_PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256 help
1257 Find out whether you have a PCI motherboard. PCI is the name of a
1258 bus system, i.e. the way the CPU talks to the other stuff inside
1259 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1260 VESA. If you have PCI, say Y, otherwise N.
1261
Anton Vorontsov52882172010-04-19 13:20:49 +01001262config PCI_DOMAINS
1263 bool
1264 depends on PCI
1265
Lorenzo Pieralisi8c7d14742014-11-21 11:29:26 +00001266config PCI_DOMAINS_GENERIC
1267 def_bool PCI_DOMAINS
1268
Marcelo Roberto Jimenezb080ac82010-12-16 21:34:51 +01001269config PCI_NANOENGINE
1270 bool "BSE nanoEngine PCI support"
1271 depends on SA1100_NANOENGINE
1272 help
1273 Enable PCI on the BSE nanoEngine board.
1274
Matthew Wilcox36e23592007-07-10 10:54:40 -06001275config PCI_SYSCALL
1276 def_bool PCI
1277
Mike Rapoporta0113a92007-11-25 08:55:34 +01001278config PCI_HOST_ITE8152
1279 bool
1280 depends on PCI && MACH_ARMCORE
1281 default y
1282 select DMABOUNCE
1283
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284source "drivers/pci/Kconfig"
1285
1286source "drivers/pcmcia/Kconfig"
1287
1288endmenu
1289
1290menu "Kernel Features"
1291
Dave Martin3b556582011-12-07 15:38:04 +00001292config HAVE_SMP
1293 bool
1294 help
1295 This option should be selected by machines which have an SMP-
1296 capable CPU.
1297
1298 The only effect of this option is to make the SMP-related
1299 options available to the user for configuration.
1300
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301config SMP
Russell Kingbb2d8132011-05-12 09:52:02 +01001302 bool "Symmetric Multi-Processing"
Russell Kingfbb4dda2011-01-17 18:01:58 +00001303 depends on CPU_V6K || CPU_V7
Russell Kingbc282482009-05-17 18:58:34 +01001304 depends on GENERIC_CLOCKEVENTS
Dave Martin3b556582011-12-07 15:38:04 +00001305 depends on HAVE_SMP
Jonathan Austin801bb212013-02-22 18:56:04 +00001306 depends on MMU || ARM_MPU
Arnd Bergmann03617482015-05-26 15:36:58 +01001307 select IRQ_WORK
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 help
1309 This enables support for systems with more than one CPU. If you have
Robert Graffham4a474152014-01-23 15:55:29 -08001310 a system with only one CPU, say N. If you have a system with more
1311 than one CPU, say Y.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312
Robert Graffham4a474152014-01-23 15:55:29 -08001313 If you say N here, the kernel will run on uni- and multiprocessor
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314 machines, but will use only one CPU of a multiprocessor machine. If
Robert Graffham4a474152014-01-23 15:55:29 -08001315 you say Y here, the kernel will run on many, but not all,
1316 uniprocessor machines. On a uniprocessor machine, the kernel
1317 will run faster if you say N here.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318
Paul Bolle395cf962011-08-15 02:02:26 +02001319 See also <file:Documentation/x86/i386/IO-APIC.txt>,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
Justin P. Mattock50a23e62010-10-16 10:36:23 -07001321 <http://tldp.org/HOWTO/SMP-HOWTO.html>.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322
1323 If you don't know what to do here, say N.
1324
Russell Kingf00ec482010-09-04 10:47:48 +01001325config SMP_ON_UP
Russell King5744ff42015-02-13 11:04:21 +00001326 bool "Allow booting SMP kernel on uniprocessor systems"
Jonathan Austin801bb212013-02-22 18:56:04 +00001327 depends on SMP && !XIP_KERNEL && MMU
Russell Kingf00ec482010-09-04 10:47:48 +01001328 default y
1329 help
1330 SMP kernels contain instructions which fail on non-SMP processors.
1331 Enabling this option allows the kernel to modify itself to make
1332 these instructions safe. Disabling it allows about 1K of space
1333 savings.
1334
1335 If you don't know what to do here, say Y.
1336
Vincent Guittotc9018aa2011-08-08 13:21:59 +01001337config ARM_CPU_TOPOLOGY
1338 bool "Support cpu topology definition"
1339 depends on SMP && CPU_V7
1340 default y
1341 help
1342 Support ARM cpu topology definition. The MPIDR register defines
1343 affinity between processors which is then used to describe the cpu
1344 topology of an ARM System.
1345
1346config SCHED_MC
1347 bool "Multi-core scheduler support"
1348 depends on ARM_CPU_TOPOLOGY
1349 help
1350 Multi-core scheduler support improves the CPU scheduler's decision
1351 making when dealing with multi-core CPU chips at a cost of slightly
1352 increased overhead in some places. If unsure say N here.
1353
1354config SCHED_SMT
1355 bool "SMT scheduler support"
1356 depends on ARM_CPU_TOPOLOGY
1357 help
1358 Improves the CPU scheduler's decision making when dealing with
1359 MultiThreading at a cost of slightly increased overhead in some
1360 places. If unsure say N here.
1361
Russell Kinga8cbcd92009-05-16 11:51:14 +01001362config HAVE_ARM_SCU
1363 bool
Russell Kinga8cbcd92009-05-16 11:51:14 +01001364 help
1365 This option enables support for the ARM system coherency unit
1366
Mark Rutland8a4da6e2012-11-12 14:33:44 +00001367config HAVE_ARM_ARCH_TIMER
Marc Zyngier022c03a2012-01-11 17:25:17 +00001368 bool "Architected timer support"
1369 depends on CPU_V7
Mark Rutland8a4da6e2012-11-12 14:33:44 +00001370 select ARM_ARCH_TIMER
Will Deacon0c4034622013-11-19 15:46:17 +01001371 select GENERIC_CLOCKEVENTS
Marc Zyngier022c03a2012-01-11 17:25:17 +00001372 help
1373 This option enables support for the ARM architected timer
1374
Russell Kingf32f4ce2009-05-16 12:14:21 +01001375config HAVE_ARM_TWD
1376 bool
Rob Herringda4a6862013-02-06 21:17:47 -06001377 select CLKSRC_OF if OF
Russell Kingf32f4ce2009-05-16 12:14:21 +01001378 help
1379 This options enables support for the ARM timer and watchdog unit
1380
Nicolas Pitree8db2882012-04-12 02:45:22 -04001381config MCPM
1382 bool "Multi-Cluster Power Management"
1383 depends on CPU_V7 && SMP
1384 help
1385 This option provides the common power management infrastructure
1386 for (multi-)cluster based systems, such as big.LITTLE based
1387 systems.
1388
Haojian Zhuangebf4a5c2014-04-15 14:52:00 +08001389config MCPM_QUAD_CLUSTER
1390 bool
1391 depends on MCPM
1392 help
1393 To avoid wasting resources unnecessarily, MCPM only supports up
1394 to 2 clusters by default.
1395 Platforms with 3 or 4 clusters that use MCPM must select this
1396 option to allow the additional clusters to be managed.
1397
Nicolas Pitre1c33be52012-04-12 02:56:10 -04001398config BIG_LITTLE
1399 bool "big.LITTLE support (Experimental)"
1400 depends on CPU_V7 && SMP
1401 select MCPM
1402 help
1403 This option enables support selections for the big.LITTLE
1404 system architecture.
1405
1406config BL_SWITCHER
1407 bool "big.LITTLE switcher support"
Arnd Bergmann6c044fe2015-11-19 15:49:23 +01001408 depends on BIG_LITTLE && MCPM && HOTPLUG_CPU && ARM_GIC
Russell King51aaf812014-04-22 22:26:27 +01001409 select CPU_PM
Nicolas Pitre1c33be52012-04-12 02:56:10 -04001410 help
1411 The big.LITTLE "switcher" provides the core functionality to
1412 transparently handle transition between a cluster of A15's
1413 and a cluster of A7's in a big.LITTLE system.
1414
Nicolas Pitreb22537c2012-04-12 03:04:28 -04001415config BL_SWITCHER_DUMMY_IF
1416 tristate "Simple big.LITTLE switcher user interface"
1417 depends on BL_SWITCHER && DEBUG_KERNEL
1418 help
1419 This is a simple and dummy char dev interface to control
1420 the big.LITTLE switcher core code. It is meant for
1421 debugging purposes only.
1422
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001423choice
1424 prompt "Memory split"
Russell King006fa252014-02-26 19:40:46 +00001425 depends on MMU
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001426 default VMSPLIT_3G
1427 help
1428 Select the desired split between kernel and user memory.
1429
1430 If you are not absolutely sure what you are doing, leave this
1431 option alone!
1432
1433 config VMSPLIT_3G
1434 bool "3G/1G user/kernel split"
Nicolas Pitre63ce4462015-09-13 03:30:11 +01001435 config VMSPLIT_3G_OPT
1436 bool "3G/1G user/kernel split (for full 1G low memory)"
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001437 config VMSPLIT_2G
1438 bool "2G/2G user/kernel split"
1439 config VMSPLIT_1G
1440 bool "1G/3G user/kernel split"
1441endchoice
1442
1443config PAGE_OFFSET
1444 hex
Russell King006fa252014-02-26 19:40:46 +00001445 default PHYS_OFFSET if !MMU
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001446 default 0x40000000 if VMSPLIT_1G
1447 default 0x80000000 if VMSPLIT_2G
Nicolas Pitre63ce4462015-09-13 03:30:11 +01001448 default 0xB0000000 if VMSPLIT_3G_OPT
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001449 default 0xC0000000
1450
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451config NR_CPUS
1452 int "Maximum number of CPUs (2-32)"
1453 range 2 32
1454 depends on SMP
1455 default "4"
1456
Russell Kinga054a812005-11-02 22:24:33 +00001457config HOTPLUG_CPU
Russell King00b7ded2012-10-22 22:54:30 +01001458 bool "Support for hot-pluggable CPUs"
Stephen Rothwell40b31362013-05-21 13:49:35 +10001459 depends on SMP
Russell Kinga054a812005-11-02 22:24:33 +00001460 help
1461 Say Y here to experiment with turning CPUs off and on. CPUs
1462 can be controlled through /sys/devices/system/cpu.
1463
Will Deacon2bdd4242012-12-12 19:20:52 +00001464config ARM_PSCI
1465 bool "Support for the ARM Power State Coordination Interface (PSCI)"
Jens Wiklandere6796602016-01-04 15:46:47 +01001466 depends on HAVE_ARM_SMCCC
Mark Rutlandbe120392015-07-31 15:46:19 +01001467 select ARM_PSCI_FW
Will Deacon2bdd4242012-12-12 19:20:52 +00001468 help
1469 Say Y here if you want Linux to communicate with system firmware
1470 implementing the PSCI specification for CPU-centric power
1471 management operations described in ARM document number ARM DEN
1472 0022A ("Power State Coordination Interface System Software on
1473 ARM processors").
1474
Maxime Ripard2a6ad872013-02-03 12:24:48 +01001475# The GPIO number here must be sorted by descending number. In case of
1476# a multiplatform kernel, we just want the highest value required by the
1477# selected platforms.
Peter De Schrijver (NVIDIA)44986ab2011-12-21 10:48:45 +01001478config ARCH_NR_GPIO
1479 int
Gregory Fongb35d2e52015-05-28 19:14:10 -07001480 default 1024 if ARCH_BRCMSTB || ARCH_SHMOBILE || ARCH_TEGRA || \
1481 ARCH_ZYNQ
Tomasz Figaaa425872014-07-03 13:17:12 +02001482 default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || \
1483 SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210
Boris BREZILLONeb171a92014-04-10 15:52:46 +02001484 default 416 if ARCH_SUNXI
Olof Johansson06b851e2013-04-02 18:33:58 -07001485 default 392 if ARCH_U8500
Tony Prisk01bb9142013-03-09 18:22:30 +13001486 default 352 if ARCH_VT8500
Heiko Stuebner7b5da4c2014-05-26 00:13:51 +02001487 default 288 if ARCH_ROCKCHIP
Maxime Ripard2a6ad872013-02-03 12:24:48 +01001488 default 264 if MACH_H4700
Peter De Schrijver (NVIDIA)44986ab2011-12-21 10:48:45 +01001489 default 0
1490 help
1491 Maximum number of GPIOs in the system.
1492
1493 If unsure, leave the default value.
1494
Uwe Kleine-Königd45a3982009-08-13 20:38:17 +02001495source kernel/Kconfig.preempt
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496
Russell Kingc9218b12013-04-27 23:31:10 +01001497config HZ_FIXED
Russell Kingf8065812006-03-02 22:41:59 +00001498 int
Kukjin Kim070b8b42014-07-02 07:50:15 +09001499 default 200 if ARCH_EBSA110 || ARCH_S3C24XX || \
Kukjin Kima73ddc62011-05-11 16:27:51 +09001500 ARCH_S5PV210 || ARCH_EXYNOS4
Alexandre Belloni1164f672015-03-13 22:57:24 +01001501 default 128 if SOC_AT91RM9200
Russell King47d84682013-09-10 23:47:55 +01001502 default 0
Russell Kingc9218b12013-04-27 23:31:10 +01001503
1504choice
Russell King47d84682013-09-10 23:47:55 +01001505 depends on HZ_FIXED = 0
Russell Kingc9218b12013-04-27 23:31:10 +01001506 prompt "Timer frequency"
1507
1508config HZ_100
1509 bool "100 Hz"
1510
1511config HZ_200
1512 bool "200 Hz"
1513
1514config HZ_250
1515 bool "250 Hz"
1516
1517config HZ_300
1518 bool "300 Hz"
1519
1520config HZ_500
1521 bool "500 Hz"
1522
1523config HZ_1000
1524 bool "1000 Hz"
1525
1526endchoice
1527
1528config HZ
1529 int
Russell King47d84682013-09-10 23:47:55 +01001530 default HZ_FIXED if HZ_FIXED != 0
Russell Kingc9218b12013-04-27 23:31:10 +01001531 default 100 if HZ_100
1532 default 200 if HZ_200
1533 default 250 if HZ_250
1534 default 300 if HZ_300
1535 default 500 if HZ_500
1536 default 1000
1537
1538config SCHED_HRTICK
1539 def_bool HIGH_RES_TIMERS
Russell Kingf8065812006-03-02 22:41:59 +00001540
Catalin Marinas16c79652009-07-24 12:33:02 +01001541config THUMB2_KERNEL
Uwe Kleine-Königbc7dea02011-12-09 20:52:10 +01001542 bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
Uwe Kleine-König4477ca42013-03-21 21:02:37 +01001543 depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
Uwe Kleine-Königbc7dea02011-12-09 20:52:10 +01001544 default y if CPU_THUMBONLY
Catalin Marinas16c79652009-07-24 12:33:02 +01001545 select AEABI
1546 select ARM_ASM_UNIFIED
Arnd Bergmann89bace62011-06-10 14:12:21 +00001547 select ARM_UNWIND
Catalin Marinas16c79652009-07-24 12:33:02 +01001548 help
1549 By enabling this option, the kernel will be compiled in
1550 Thumb-2 mode. A compiler/assembler that understand the unified
1551 ARM-Thumb syntax is needed.
1552
1553 If unsure, say N.
1554
Dave Martin6f685c52011-03-03 11:41:12 +01001555config THUMB2_AVOID_R_ARM_THM_JUMP11
1556 bool "Work around buggy Thumb-2 short branch relocations in gas"
1557 depends on THUMB2_KERNEL && MODULES
1558 default y
1559 help
1560 Various binutils versions can resolve Thumb-2 branches to
1561 locally-defined, preemptible global symbols as short-range "b.n"
1562 branch instructions.
1563
1564 This is a problem, because there's no guarantee the final
1565 destination of the symbol, or any candidate locations for a
1566 trampoline, are within range of the branch. For this reason, the
1567 kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1568 relocation in modules at all, and it makes little sense to add
1569 support.
1570
1571 The symptom is that the kernel fails with an "unsupported
1572 relocation" error when loading some modules.
1573
1574 Until fixed tools are available, passing
1575 -fno-optimize-sibling-calls to gcc should prevent gcc generating
1576 code which hits this problem, at the cost of a bit of extra runtime
1577 stack usage in some cases.
1578
1579 The problem is described in more detail at:
1580 https://bugs.launchpad.net/binutils-linaro/+bug/725126
1581
1582 Only Thumb-2 kernels are affected.
1583
1584 Unless you are sure your tools don't have this problem, say Y.
1585
Catalin Marinas0becb082009-07-24 12:32:53 +01001586config ARM_ASM_UNIFIED
1587 bool
1588
Nicolas Pitre42f25bd2015-12-12 02:49:21 +01001589config ARM_PATCH_IDIV
1590 bool "Runtime patch udiv/sdiv instructions into __aeabi_{u}idiv()"
1591 depends on CPU_32v7 && !XIP_KERNEL
1592 default y
1593 help
1594 The ARM compiler inserts calls to __aeabi_idiv() and
1595 __aeabi_uidiv() when it needs to perform division on signed
1596 and unsigned integers. Some v7 CPUs have support for the sdiv
1597 and udiv instructions that can be used to implement those
1598 functions.
1599
1600 Enabling this option allows the kernel to modify itself to
1601 replace the first two instructions of these library functions
1602 with the sdiv or udiv plus "bx lr" instructions when the CPU
1603 it is running on supports them. Typically this will be faster
1604 and less power intensive than running the original library
1605 code to do integer division.
1606
Nicolas Pitre704bdda02006-01-14 16:33:50 +00001607config AEABI
1608 bool "Use the ARM EABI to compile the kernel"
1609 help
1610 This option allows for the kernel to be compiled using the latest
1611 ARM ABI (aka EABI). This is only useful if you are using a user
1612 space environment that is also compiled with EABI.
1613
1614 Since there are major incompatibilities between the legacy ABI and
1615 EABI, especially with regard to structure member alignment, this
1616 option also changes the kernel syscall calling convention to
1617 disambiguate both ABIs and allow for backward compatibility support
1618 (selected with CONFIG_OABI_COMPAT).
1619
1620 To use this you need GCC version 4.0.0 or later.
1621
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001622config OABI_COMPAT
Russell Kinga73a3ff2006-02-08 21:09:55 +00001623 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
Kees Cookd6f94fa2013-01-16 18:53:14 -08001624 depends on AEABI && !THUMB2_KERNEL
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001625 help
1626 This option preserves the old syscall interface along with the
1627 new (ARM EABI) one. It also provides a compatibility layer to
1628 intercept syscalls that have structure arguments which layout
1629 in memory differs between the legacy ABI and the new ARM EABI
1630 (only for non "thumb" binaries). This option adds a tiny
1631 overhead to all syscalls and produces a slightly larger kernel.
Kees Cook91702172013-11-09 00:51:56 +01001632
1633 The seccomp filter system will not be available when this is
1634 selected, since there is no way yet to sensibly distinguish
1635 between calling conventions during filtering.
1636
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001637 If you know you'll be using only pure EABI user space then you
1638 can say N here. If this option is not selected and you attempt
1639 to execute a legacy ABI binary then the result will be
1640 UNPREDICTABLE (in fact it can be predicted that it won't work
Kees Cookb02f8462013-11-09 00:31:11 +01001641 at all). If in doubt say N.
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001642
Mel Gormaneb335752009-05-13 17:34:48 +01001643config ARCH_HAS_HOLES_MEMORYMODEL
Mel Gormane80d6a22008-08-14 11:10:14 +01001644 bool
Mel Gormane80d6a22008-08-14 11:10:14 +01001645
Russell King05944d72006-11-30 20:43:51 +00001646config ARCH_SPARSEMEM_ENABLE
1647 bool
1648
Russell King07a2f732008-10-01 21:39:58 +01001649config ARCH_SPARSEMEM_DEFAULT
1650 def_bool ARCH_SPARSEMEM_ENABLE
1651
Russell King05944d72006-11-30 20:43:51 +00001652config ARCH_SELECT_MEMORY_MODEL
Russell Kingbe370302010-05-07 17:40:33 +01001653 def_bool ARCH_SPARSEMEM_ENABLE
Yasunori Gotoc80d79d2006-04-10 22:53:53 -07001654
Will Deacon7b7bf492011-05-19 13:21:14 +01001655config HAVE_ARCH_PFN_VALID
1656 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1657
Steve Capperb8cd51a2014-10-09 15:29:20 -07001658config HAVE_GENERIC_RCU_GUP
1659 def_bool y
1660 depends on ARM_LPAE
1661
Nicolas Pitre053a96c2008-09-19 00:36:12 -04001662config HIGHMEM
Russell Kinge8db89a2011-05-12 09:53:05 +01001663 bool "High Memory Support"
1664 depends on MMU
Nicolas Pitre053a96c2008-09-19 00:36:12 -04001665 help
1666 The address space of ARM processors is only 4 Gigabytes large
1667 and it has to accommodate user address space, kernel address
1668 space as well as some memory mapped IO. That means that, if you
1669 have a large amount of physical memory and/or IO, not all of the
1670 memory can be "permanently mapped" by the kernel. The physical
1671 memory that is not permanently mapped is called "high memory".
1672
1673 Depending on the selected kernel/user memory split, minimum
1674 vmalloc space and actual amount of RAM, you may not need this
1675 option which should result in a slightly faster kernel.
1676
1677 If unsure, say n.
1678
Russell King65cec8e2009-08-17 20:02:06 +01001679config HIGHPTE
Russell King9a431bd2015-06-25 10:44:08 +01001680 bool "Allocate 2nd-level pagetables from highmem" if EXPERT
Russell King65cec8e2009-08-17 20:02:06 +01001681 depends on HIGHMEM
Russell King9a431bd2015-06-25 10:44:08 +01001682 default y
Russell Kingb4d103d2015-06-25 10:49:45 +01001683 help
1684 The VM uses one page of physical memory for each page table.
1685 For systems with a lot of processes, this can use a lot of
1686 precious low memory, eventually leading to low memory being
1687 consumed by page tables. Setting this option will allow
1688 user-space 2nd level page tables to reside in high memory.
Russell King65cec8e2009-08-17 20:02:06 +01001689
Russell Kinga5e090a2015-08-19 20:40:41 +01001690config CPU_SW_DOMAIN_PAN
1691 bool "Enable use of CPU domains to implement privileged no-access"
1692 depends on MMU && !ARM_LPAE
Jamie Iles1b8873a2010-02-02 20:25:44 +01001693 default y
1694 help
Russell Kinga5e090a2015-08-19 20:40:41 +01001695 Increase kernel security by ensuring that normal kernel accesses
1696 are unable to access userspace addresses. This can help prevent
1697 use-after-free bugs becoming an exploitable privilege escalation
1698 by ensuring that magic values (such as LIST_POISON) will always
1699 fault when dereferenced.
1700
1701 CPUs with low-vector mappings use a best-efforts implementation.
1702 Their lower 1MB needs to remain accessible for the vectors, but
1703 the remainder of userspace will become appropriately inaccessible.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704
1705config HW_PERF_EVENTS
Mark Rutlandfa8ad782015-07-06 12:23:53 +01001706 def_bool y
1707 depends on ARM_PMU
Jamie Iles1b8873a2010-02-02 20:25:44 +01001708
Catalin Marinas1355e2a2012-07-25 14:32:38 +01001709config SYS_SUPPORTS_HUGETLBFS
1710 def_bool y
1711 depends on ARM_LPAE
1712
Catalin Marinas8d962502012-07-25 14:39:26 +01001713config HAVE_ARCH_TRANSPARENT_HUGEPAGE
1714 def_bool y
1715 depends on ARM_LPAE
1716
Steven Capper4bfab202013-07-26 14:58:22 +01001717config ARCH_WANT_GENERAL_HUGETLB
1718 def_bool y
1719
Ard Biesheuvel7d485f62014-11-24 16:54:35 +01001720config ARM_MODULE_PLTS
1721 bool "Use PLTs to allow module memory to spill over into vmalloc area"
1722 depends on MODULES
1723 help
1724 Allocate PLTs when loading modules so that jumps and calls whose
1725 targets are too far away for their relative offsets to be encoded
1726 in the instructions themselves can be bounced via veneers in the
1727 module's PLT. This allows modules to be allocated in the generic
1728 vmalloc area after the dedicated module memory area has been
1729 exhausted. The modules will use slightly more memory, but after
1730 rounding up to page size, the actual memory footprint is usually
1731 the same.
1732
1733 Say y if you are getting out of memory errors while loading modules
1734
Linus Torvalds1da177e2005-04-16 15:20:36 -07001735source "mm/Kconfig"
1736
Magnus Dammc1b2d972010-07-05 10:00:11 +01001737config FORCE_MAX_ZONEORDER
Ulrich Hecht36d6c922015-08-14 15:51:06 +02001738 int "Maximum zone order"
Yegor Yefremov898f08e2012-10-08 14:37:53 -07001739 default "12" if SOC_AM33XX
Uwe Kleine-König6d85e2b2011-11-17 14:36:23 +01001740 default "9" if SA1111 || ARCH_EFM32
Magnus Dammc1b2d972010-07-05 10:00:11 +01001741 default "11"
1742 help
1743 The kernel memory allocator divides physically contiguous memory
1744 blocks into "zones", where each zone is a power of two number of
1745 pages. This option selects the largest power of two that the kernel
1746 keeps in the memory allocator. If you need to allocate very large
1747 blocks of physically contiguous memory, then you may need to
1748 increase this value.
1749
1750 This config option is actually maximum order plus one. For example,
1751 a value of 11 means that the largest free memory block is 2^10 pages.
1752
Linus Torvalds1da177e2005-04-16 15:20:36 -07001753config ALIGNMENT_TRAP
1754 bool
Hyok S. Choif12d0d72006-09-26 17:36:37 +09001755 depends on CPU_CP15_MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756 default y if !ARCH_EBSA110
Russell Kinge119bff2010-01-10 17:23:29 +00001757 select HAVE_PROC_CPU if PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001758 help
Matt LaPlante84eb8d02006-10-03 22:53:09 +02001759 ARM processors cannot fetch/store information which is not
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1761 address divisible by 4. On 32-bit ARM processors, these non-aligned
1762 fetch/store instructions will be emulated in software if you say
1763 here, which has a severe performance impact. This is necessary for
1764 correct operation of some network protocols. With an IP-only
1765 configuration it is safe to say N, otherwise say Y.
1766
Lennert Buytenhek39ec58f2009-03-09 14:30:09 -04001767config UACCESS_WITH_MEMCPY
Linus Walleij38ef2ad2012-09-10 16:36:37 +01001768 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
1769 depends on MMU
Lennert Buytenhek39ec58f2009-03-09 14:30:09 -04001770 default y if CPU_FEROCEON
1771 help
1772 Implement faster copy_to_user and clear_user methods for CPU
1773 cores where a 8-word STM instruction give significantly higher
1774 memory write throughput than a sequence of individual 32bit stores.
1775
1776 A possible side effect is a slight increase in scheduling latency
1777 between threads sharing the same address space if they invoke
1778 such copy operations with large buffers.
1779
1780 However, if the CPU data cache is using a write-allocate mode,
1781 this option is unlikely to provide any performance gain.
1782
Nicolas Pitre70c70d92010-08-26 15:08:35 -07001783config SECCOMP
1784 bool
1785 prompt "Enable seccomp to safely compute untrusted bytecode"
1786 ---help---
1787 This kernel feature is useful for number crunching applications
1788 that may need to compute untrusted bytecode during their
1789 execution. By using pipes or other transports made available to
1790 the process as file descriptors supporting the read/write
1791 syscalls, it's possible to isolate those applications in
1792 their own address space using seccomp. Once seccomp is
1793 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1794 and the task is only allowed to execute a few safe syscalls
1795 defined by each seccomp mode.
1796
Stefano Stabellini06e62952013-10-15 15:47:14 +00001797config SWIOTLB
1798 def_bool y
1799
1800config IOMMU_HELPER
1801 def_bool SWIOTLB
1802
Stefano Stabellini02c24332015-11-23 10:32:57 +00001803config PARAVIRT
1804 bool "Enable paravirtualization code"
1805 help
1806 This changes the kernel so it can modify itself when it is run
1807 under a hypervisor, potentially improving performance significantly
1808 over full virtualization.
1809
1810config PARAVIRT_TIME_ACCOUNTING
1811 bool "Paravirtual steal time accounting"
1812 select PARAVIRT
1813 default n
1814 help
1815 Select this option to enable fine granularity task steal time
1816 accounting. Time spent executing other tasks in parallel with
1817 the current vCPU is discounted from the vCPU power. To account for
1818 that, there can be a small performance impact.
1819
1820 If in doubt, say N here.
1821
Stefano Stabellinieff8d642012-09-17 14:58:17 +00001822config XEN_DOM0
1823 def_bool y
1824 depends on XEN
1825
1826config XEN
Julien Grallc2ba1f72014-09-17 14:07:06 -07001827 bool "Xen guest support on ARM"
Ian Campbell85323a92013-03-07 07:17:25 +00001828 depends on ARM && AEABI && OF
Arnd Bergmannf880b672012-10-09 10:33:52 +00001829 depends on CPU_V7 && !CPU_V6
Ian Campbell85323a92013-03-07 07:17:25 +00001830 depends on !GENERIC_ATOMIC64
Uwe Kleine-König7693dec2014-03-03 09:25:52 -05001831 depends on MMU
Russell King51aaf812014-04-22 22:26:27 +01001832 select ARCH_DMA_ADDR_T_64BIT
Stefano Stabellini17b7ab82013-04-24 18:47:18 +00001833 select ARM_PSCI
Stefano Stabellini83862cc2013-10-10 13:40:44 +00001834 select SWIOTLB_XEN
Stefano Stabellini02c24332015-11-23 10:32:57 +00001835 select PARAVIRT
Stefano Stabellinieff8d642012-09-17 14:58:17 +00001836 help
1837 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
1838
Dima Zavin1bffa8f2011-08-23 15:56:50 -07001839config ARM_FLUSH_CONSOLE_ON_RESTART
1840 bool "Force flush the console on restart"
1841 help
1842 If the console is locked while the system is rebooted, the messages
1843 in the temporary logbuffer would not have propogated to all the
1844 console drivers. This option forces the console lock to be
1845 released if it failed to be acquired, which will cause all the
1846 pending messages to be flushed.
1847
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848endmenu
1849
1850menu "Boot options"
1851
Grant Likely9eb8f672011-04-28 14:27:20 -06001852config USE_OF
1853 bool "Flattened Device Tree support"
Russell Kingb1b3f492012-10-06 17:12:25 +01001854 select IRQ_DOMAIN
Grant Likely9eb8f672011-04-28 14:27:20 -06001855 select OF
Grant Likely9eb8f672011-04-28 14:27:20 -06001856 help
1857 Include support for flattened device tree machine descriptions.
1858
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01001859config ATAGS
1860 bool "Support for the traditional ATAGS boot data passing" if USE_OF
1861 default y
1862 help
1863 This is the traditional way of passing data to the kernel at boot
1864 time. If you are solely relying on the flattened device tree (or
1865 the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
1866 to remove ATAGS support from your kernel binary. If unsure,
1867 leave this to y.
1868
1869config DEPRECATED_PARAM_STRUCT
1870 bool "Provide old way to pass kernel parameters"
1871 depends on ATAGS
1872 help
1873 This was deprecated in 2001 and announced to live on for 5 years.
1874 Some old boot loaders still use this way.
1875
Erik Gillingf6a3adb2013-03-25 15:04:41 -07001876config BUILD_ARM_APPENDED_DTB_IMAGE
1877 bool "Build a concatenated zImage/dtb by default"
1878 depends on OF
1879 help
Colin Crossf0e7eaef2013-04-17 16:58:36 -07001880 Enabling this option will cause a concatenated zImage and list of
1881 DTBs to be built by default (instead of a standalone zImage.)
1882 The image will built in arch/arm/boot/zImage-dtb
Erik Gillingf6a3adb2013-03-25 15:04:41 -07001883
Colin Crossf0e7eaef2013-04-17 16:58:36 -07001884config BUILD_ARM_APPENDED_DTB_IMAGE_NAMES
1885 string "Default dtb names"
Erik Gillingf6a3adb2013-03-25 15:04:41 -07001886 depends on BUILD_ARM_APPENDED_DTB_IMAGE
1887 help
Colin Crossf0e7eaef2013-04-17 16:58:36 -07001888 Space separated list of names of dtbs to append when
1889 building a concatenated zImage-dtb.
Erik Gillingf6a3adb2013-03-25 15:04:41 -07001890
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891# Compressed boot loader in ROM. Yes, we really want to ask about
1892# TEXT and BSS so we preserve their values in the config files.
1893config ZBOOT_ROM_TEXT
1894 hex "Compressed ROM boot loader base address"
1895 default "0"
1896 help
1897 The physical address at which the ROM-able zImage is to be
1898 placed in the target. Platforms which normally make use of
1899 ROM-able zImage formats normally set this to a suitable
1900 value in their defconfig file.
1901
1902 If ZBOOT_ROM is not enabled, this has no effect.
1903
1904config ZBOOT_ROM_BSS
1905 hex "Compressed ROM boot loader BSS address"
1906 default "0"
1907 help
Dan Fandrichf8c440b2006-09-20 23:28:51 +01001908 The base address of an area of read/write memory in the target
1909 for the ROM-able zImage which must be available while the
1910 decompressor is running. It must be large enough to hold the
1911 entire decompressed kernel plus an additional 128 KiB.
1912 Platforms which normally make use of ROM-able zImage formats
1913 normally set this to a suitable value in their defconfig file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914
1915 If ZBOOT_ROM is not enabled, this has no effect.
1916
1917config ZBOOT_ROM
1918 bool "Compressed boot loader in ROM/flash"
1919 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
Russell King10968132014-01-01 11:59:44 +00001920 depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR
Linus Torvalds1da177e2005-04-16 15:20:36 -07001921 help
1922 Say Y here if you intend to execute your compressed kernel image
1923 (zImage) directly from ROM or flash. If unsure, say N.
1924
John Bonesioe2a6a3a2011-05-27 18:45:50 -04001925config ARM_APPENDED_DTB
1926 bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
Russell King10968132014-01-01 11:59:44 +00001927 depends on OF
John Bonesioe2a6a3a2011-05-27 18:45:50 -04001928 help
1929 With this option, the boot code will look for a device tree binary
1930 (DTB) appended to zImage
1931 (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1932
1933 This is meant as a backward compatibility convenience for those
1934 systems with a bootloader that can't be upgraded to accommodate
1935 the documented boot protocol using a device tree.
1936
1937 Beware that there is very little in terms of protection against
1938 this option being confused by leftover garbage in memory that might
1939 look like a DTB header after a reboot if no actual DTB is appended
1940 to zImage. Do not leave this option active in a production kernel
1941 if you don't intend to always append a DTB. Proper passing of the
1942 location into r2 of a bootloader provided DTB is always preferable
1943 to this option.
1944
Nicolas Pitreb90b9a32011-09-13 22:37:07 -04001945config ARM_ATAG_DTB_COMPAT
1946 bool "Supplement the appended DTB with traditional ATAG information"
1947 depends on ARM_APPENDED_DTB
1948 help
1949 Some old bootloaders can't be updated to a DTB capable one, yet
1950 they provide ATAGs with memory configuration, the ramdisk address,
1951 the kernel cmdline string, etc. Such information is dynamically
1952 provided by the bootloader and can't always be stored in a static
1953 DTB. To allow a device tree enabled kernel to be used with such
1954 bootloaders, this option allows zImage to extract the information
1955 from the ATAG list and store it at run time into the appended DTB.
1956
Genoud Richardd0f34a112012-06-26 16:37:59 +01001957choice
1958 prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
1959 default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1960
1961config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1962 bool "Use bootloader kernel arguments if available"
1963 help
1964 Uses the command-line options passed by the boot loader instead of
1965 the device tree bootargs property. If the boot loader doesn't provide
1966 any, the device tree bootargs property will be used.
1967
1968config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
1969 bool "Extend with bootloader kernel arguments"
1970 help
1971 The command-line arguments provided by the boot loader will be
1972 appended to the the device tree bootargs property.
1973
1974endchoice
1975
Linus Torvalds1da177e2005-04-16 15:20:36 -07001976config CMDLINE
1977 string "Default kernel command string"
1978 default ""
1979 help
1980 On some architectures (EBSA110 and CATS), there is currently no way
1981 for the boot loader to pass arguments to the kernel. For these
1982 architectures, you should supply some command-line options at build
1983 time by entering them here. As a minimum, you should specify the
1984 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1985
Victor Boivie4394c122011-05-04 17:07:55 +01001986choice
1987 prompt "Kernel command line type" if CMDLINE != ""
1988 default CMDLINE_FROM_BOOTLOADER
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01001989 depends on ATAGS
Victor Boivie4394c122011-05-04 17:07:55 +01001990
1991config CMDLINE_FROM_BOOTLOADER
1992 bool "Use bootloader kernel arguments if available"
1993 help
1994 Uses the command-line options passed by the boot loader. If
1995 the boot loader doesn't provide any, the default kernel command
1996 string provided in CMDLINE will be used.
1997
1998config CMDLINE_EXTEND
1999 bool "Extend bootloader kernel arguments"
2000 help
2001 The command-line arguments provided by the boot loader will be
2002 appended to the default kernel command string.
2003
Alexander Holler92d20402010-02-16 19:04:53 +01002004config CMDLINE_FORCE
2005 bool "Always use the default kernel command string"
Alexander Holler92d20402010-02-16 19:04:53 +01002006 help
2007 Always use the default kernel command string, even if the boot
2008 loader passes other arguments to the kernel.
2009 This is useful if you cannot or don't want to change the
2010 command-line options your boot loader passes to the kernel.
Victor Boivie4394c122011-05-04 17:07:55 +01002011endchoice
Alexander Holler92d20402010-02-16 19:04:53 +01002012
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013config XIP_KERNEL
2014 bool "Kernel Execute-In-Place from ROM"
Russell King10968132014-01-01 11:59:44 +00002015 depends on !ARM_LPAE && !ARCH_MULTIPLATFORM
Linus Torvalds1da177e2005-04-16 15:20:36 -07002016 help
2017 Execute-In-Place allows the kernel to run from non-volatile storage
2018 directly addressable by the CPU, such as NOR flash. This saves RAM
2019 space since the text section of the kernel is not loaded from flash
2020 to RAM. Read-write sections, such as the data section and stack,
2021 are still copied to RAM. The XIP kernel is not compressed since
2022 it has to run directly from flash, so it will take more space to
2023 store it. The flash address used to link the kernel object files,
2024 and for storing it, is configuration dependent. Therefore, if you
2025 say Y here, you must know the proper physical address where to
2026 store the kernel image depending on your own flash memory usage.
2027
2028 Also note that the make target becomes "make xipImage" rather than
2029 "make zImage" or "make Image". The final kernel binary to put in
2030 ROM memory will be arch/arm/boot/xipImage.
2031
2032 If unsure, say N.
2033
2034config XIP_PHYS_ADDR
2035 hex "XIP Kernel Physical Location"
2036 depends on XIP_KERNEL
2037 default "0x00080000"
2038 help
2039 This is the physical address in your flash memory the kernel will
2040 be linked for and stored to. This address is dependent on your
2041 own flash usage.
2042
Richard Purdiec587e4a2007-02-06 21:29:00 +01002043config KEXEC
2044 bool "Kexec system call (EXPERIMENTAL)"
Stephen Warren19ab4282013-06-14 16:14:14 +01002045 depends on (!SMP || PM_SLEEP_SMP)
Arnd Bergmanncb1293e2015-05-26 15:40:44 +01002046 depends on !CPU_V7M
Dave Young2965faa2015-09-09 15:38:55 -07002047 select KEXEC_CORE
Richard Purdiec587e4a2007-02-06 21:29:00 +01002048 help
2049 kexec is a system call that implements the ability to shutdown your
2050 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante01dd2fb2007-10-20 01:34:40 +02002051 but it is independent of the system firmware. And like a reboot
Richard Purdiec587e4a2007-02-06 21:29:00 +01002052 you can start any kernel with it, not just Linux.
2053
2054 It is an ongoing process to be certain the hardware in a machine
2055 is properly shutdown, so do not be surprised if this code does not
Geert Uytterhoevenbf220692013-08-20 21:38:03 +02002056 initially work for you.
Richard Purdiec587e4a2007-02-06 21:29:00 +01002057
Richard Purdie4cd9d6f2008-01-02 00:56:46 +01002058config ATAGS_PROC
2059 bool "Export atags in procfs"
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01002060 depends on ATAGS && KEXEC
Uli Luckasb98d7292008-02-22 16:45:18 +01002061 default y
Richard Purdie4cd9d6f2008-01-02 00:56:46 +01002062 help
2063 Should the atags used to boot the kernel be exported in an "atags"
2064 file in procfs. Useful with kexec.
2065
Mika Westerbergcb5d39b2010-11-18 19:14:52 +01002066config CRASH_DUMP
2067 bool "Build kdump crash kernel (EXPERIMENTAL)"
Mika Westerbergcb5d39b2010-11-18 19:14:52 +01002068 help
2069 Generate crash dump after being started by kexec. This should
2070 be normally only set in special crash dump kernels which are
2071 loaded in the main kernel with kexec-tools into a specially
2072 reserved region and then later executed after a crash by
2073 kdump/kexec. The crash dump kernel must be compiled to a
2074 memory address not used by the main kernel
2075
2076 For more details see Documentation/kdump/kdump.txt
2077
Eric Miaoe69edc792010-07-05 15:56:50 +02002078config AUTO_ZRELADDR
2079 bool "Auto calculation of the decompressed kernel image address"
Eric Miaoe69edc792010-07-05 15:56:50 +02002080 help
2081 ZRELADDR is the physical address where the decompressed kernel
2082 image will be placed. If AUTO_ZRELADDR is selected, the address
2083 will be determined at run-time by masking the current IP with
2084 0xf8000000. This assumes the zImage being placed in the first 128MB
2085 from start of memory.
2086
Roy Franz81a0bc32015-09-23 20:17:54 -07002087config EFI_STUB
2088 bool
2089
2090config EFI
2091 bool "UEFI runtime support"
2092 depends on OF && !CPU_BIG_ENDIAN && MMU && AUTO_ZRELADDR && !XIP_KERNEL
2093 select UCS2_STRING
2094 select EFI_PARAMS_FROM_FDT
2095 select EFI_STUB
2096 select EFI_ARMSTUB
2097 select EFI_RUNTIME_WRAPPERS
2098 ---help---
2099 This option provides support for runtime services provided
2100 by UEFI firmware (such as non-volatile variables, realtime
2101 clock, and platform reset). A UEFI stub is also provided to
2102 allow the kernel to be booted as an EFI application. This
2103 is only useful for kernels that may run on systems that have
2104 UEFI firmware.
2105
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106endmenu
2107
Russell Kingac9d7ef2008-08-18 17:26:00 +01002108menu "CPU Power Management"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002109
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110source "drivers/cpufreq/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111
Russell Kingac9d7ef2008-08-18 17:26:00 +01002112source "drivers/cpuidle/Kconfig"
2113
2114endmenu
2115
Linus Torvalds1da177e2005-04-16 15:20:36 -07002116menu "Floating point emulation"
2117
2118comment "At least one emulation must be selected"
2119
2120config FPE_NWFPE
2121 bool "NWFPE math emulation"
Dave Martin593c2522010-12-13 21:56:03 +01002122 depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
Linus Torvalds1da177e2005-04-16 15:20:36 -07002123 ---help---
2124 Say Y to include the NWFPE floating point emulator in the kernel.
2125 This is necessary to run most binaries. Linux does not currently
2126 support floating point hardware so you need to say Y here even if
2127 your machine has an FPA or floating point co-processor podule.
2128
2129 You may say N here if you are going to load the Acorn FPEmulator
2130 early in the bootup.
2131
2132config FPE_NWFPE_XP
2133 bool "Support extended precision"
Lennert Buytenhekbedf1422005-11-07 21:12:08 +00002134 depends on FPE_NWFPE
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135 help
2136 Say Y to include 80-bit support in the kernel floating-point
2137 emulator. Otherwise, only 32 and 64-bit support is compiled in.
2138 Note that gcc does not generate 80-bit operations by default,
2139 so in most cases this option only enlarges the size of the
2140 floating point emulator without any good reason.
2141
2142 You almost surely want to say N here.
2143
2144config FPE_FASTFPE
2145 bool "FastFPE math emulation (EXPERIMENTAL)"
Kees Cookd6f94fa2013-01-16 18:53:14 -08002146 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147 ---help---
2148 Say Y here to include the FAST floating point emulator in the kernel.
2149 This is an experimental much faster emulator which now also has full
2150 precision for the mantissa. It does not support any exceptions.
2151 It is very simple, and approximately 3-6 times faster than NWFPE.
2152
2153 It should be sufficient for most programs. It may be not suitable
2154 for scientific calculations, but you have to check this for yourself.
2155 If you do not feel you need a faster FP emulation you should better
2156 choose NWFPE.
2157
2158config VFP
2159 bool "VFP-format floating point maths"
Russell Kinge399b1a2011-01-17 15:08:32 +00002160 depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
Linus Torvalds1da177e2005-04-16 15:20:36 -07002161 help
2162 Say Y to include VFP support code in the kernel. This is needed
2163 if your hardware includes a VFP unit.
2164
2165 Please see <file:Documentation/arm/VFP/release-notes.txt> for
2166 release notes and additional status information.
2167
2168 Say N if your target does not have VFP hardware.
2169
Catalin Marinas25ebee02007-09-25 15:22:24 +01002170config VFPv3
2171 bool
2172 depends on VFP
2173 default y if CPU_V7
2174
Catalin Marinasb5872db2008-01-10 19:16:17 +01002175config NEON
2176 bool "Advanced SIMD (NEON) Extension support"
2177 depends on VFPv3 && CPU_V7
2178 help
2179 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2180 Extension.
2181
Ard Biesheuvel73c132c2013-05-16 11:41:48 +02002182config KERNEL_MODE_NEON
2183 bool "Support for NEON in kernel mode"
Russell Kingc4a30c32013-09-22 11:08:50 +01002184 depends on NEON && AEABI
Ard Biesheuvel73c132c2013-05-16 11:41:48 +02002185 help
2186 Say Y to include support for NEON in kernel mode.
2187
Linus Torvalds1da177e2005-04-16 15:20:36 -07002188endmenu
2189
2190menu "Userspace binary formats"
2191
2192source "fs/Kconfig.binfmt"
2193
Linus Torvalds1da177e2005-04-16 15:20:36 -07002194endmenu
2195
2196menu "Power management options"
2197
Russell Kingeceab4a2005-11-15 11:31:41 +00002198source "kernel/power/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002199
Johannes Bergf4cb5702007-12-08 02:14:00 +01002200config ARCH_SUSPEND_POSSIBLE
Ezequiel Garcia19a05192013-08-16 10:28:24 +01002201 depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
Uwe Kleine-Königf0d75152012-02-01 10:00:00 +01002202 CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
Johannes Bergf4cb5702007-12-08 02:14:00 +01002203 def_bool y
2204
Arnd Bergmann15e0d9e2011-10-01 21:09:39 +02002205config ARM_CPU_SUSPEND
Lorenzo Pieralisi8b6f2492016-02-01 18:01:30 +01002206 def_bool PM_SLEEP || BL_SWITCHER || ARM_PSCI_FW
Lorenzo Pieralisi1b9bdf52016-02-01 18:01:29 +01002207 depends on ARCH_SUSPEND_POSSIBLE
Arnd Bergmann15e0d9e2011-10-01 21:09:39 +02002208
Sebastian Capella603fb422014-03-25 01:20:29 +01002209config ARCH_HIBERNATION_POSSIBLE
2210 bool
2211 depends on MMU
2212 default y if ARCH_SUSPEND_POSSIBLE
2213
Linus Torvalds1da177e2005-04-16 15:20:36 -07002214endmenu
2215
Sam Ravnborgd5950b42005-07-11 21:03:49 -07002216source "net/Kconfig"
2217
Uwe Kleine-Königac251502009-08-13 21:09:21 +02002218source "drivers/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002219
Kumar Gala916f7432015-02-26 15:49:09 -06002220source "drivers/firmware/Kconfig"
2221
Linus Torvalds1da177e2005-04-16 15:20:36 -07002222source "fs/Kconfig"
2223
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224source "arch/arm/Kconfig.debug"
2225
2226source "security/Kconfig"
2227
2228source "crypto/Kconfig"
Ard Biesheuvel652ccae2015-03-10 09:47:44 +01002229if CRYPTO
2230source "arch/arm/crypto/Kconfig"
2231endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002232
2233source "lib/Kconfig"
Christoffer Dall749cf76c2013-01-20 18:28:06 -05002234
2235source "arch/arm/kvm/Kconfig"