blob: f56b29b3f57e67dc29f65a85020d90b435c5985e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001config ARM
2 bool
3 default y
Catalin Marinas74634492012-07-30 14:41:09 -07004 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
Dan Williams21266be2015-11-19 18:19:29 -08005 select ARCH_HAS_DEVMEM_IS_ALLOWED
Kees Cook2b68f6c2015-04-14 15:48:00 -07006 select ARCH_HAS_ELF_RANDOMIZE
Mark Rutland3d067702012-10-30 12:13:42 +00007 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
Russell King171b3f02013-09-12 21:24:42 +01008 select ARCH_HAVE_CUSTOM_GPIO_H
Riku Voipio957e3fa2014-12-12 16:57:44 -08009 select ARCH_HAS_GCOV_PROFILE_ALL
Mark Salterd7018842013-10-07 22:07:58 -040010 select ARCH_MIGHT_HAVE_PC_PARPORT
Peter Zijlstra4badad32014-06-06 19:53:16 +020011 select ARCH_SUPPORTS_ATOMIC_RMW
Kim Phillips017f1612013-11-06 05:15:24 +010012 select ARCH_USE_BUILTIN_BSWAP
Will Deacon0cbad9c2013-10-09 17:19:22 +010013 select ARCH_USE_CMPXCHG_LOCKREF
Russell Kingb1b3f492012-10-06 17:12:25 +010014 select ARCH_WANT_IPC_PARSE_VERSION
Stephen Boydee951c62012-10-29 19:19:34 +010015 select BUILDTIME_EXTABLE_SORT if MMU
Russell King171b3f02013-09-12 21:24:42 +010016 select CLONE_BACKWARDS
Russell Kingb1b3f492012-10-06 17:12:25 +010017 select CPU_PM if (SUSPEND || CPU_IDLE)
Will Deacondce5c9e2013-12-17 19:50:16 +010018 select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS
Borislav Petkovb01aec92015-05-21 19:59:31 +020019 select EDAC_SUPPORT
20 select EDAC_ATOMIC_SCRUB
Laura Abbott36d0fd22014-10-09 15:26:42 -070021 select GENERIC_ALLOCATOR
Uwe Kleine-König4477ca42013-03-21 21:02:37 +010022 select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
Russell Kingb1b3f492012-10-06 17:12:25 +010023 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
Ard Biesheuvel29373672015-09-01 08:59:28 +020024 select GENERIC_EARLY_IOREMAP
Russell King171b3f02013-09-12 21:24:42 +010025 select GENERIC_IDLE_POLL_SETUP
Russell Kingb1b3f492012-10-06 17:12:25 +010026 select GENERIC_IRQ_PROBE
27 select GENERIC_IRQ_SHOW
Geert Uytterhoeven7c070052015-04-01 13:37:11 +010028 select GENERIC_IRQ_SHOW_LEVEL
Russell Kingb1b3f492012-10-06 17:12:25 +010029 select GENERIC_PCI_IOMAP
Stephen Boyd38ff87f2013-06-01 23:39:40 -070030 select GENERIC_SCHED_CLOCK
Russell Kingb1b3f492012-10-06 17:12:25 +010031 select GENERIC_SMP_IDLE_THREAD
32 select GENERIC_STRNCPY_FROM_USER
33 select GENERIC_STRNLEN_USER
Marc Zyngiera71b0922014-08-26 11:03:18 +010034 select HANDLE_DOMAIN_IRQ
Russell Kingb1b3f492012-10-06 17:12:25 +010035 select HARDIRQS_SW_RESEND
AKASHI Takahiro7a017722014-02-25 18:16:24 +090036 select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT)
Yalin Wang0b7857d2015-01-16 02:45:55 +010037 select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6
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)
58 select HAVE_GENERIC_DMA_COHERENT
Russell Kingb1b3f492012-10-06 17:12:25 +010059 select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
60 select HAVE_IDE if PCI || ISA || PCMCIA
Russell King87c46b62013-05-04 14:38:59 +010061 select HAVE_IRQ_TIME_ACCOUNTING
Russell Kingb1b3f492012-10-06 17:12:25 +010062 select HAVE_KERNEL_GZIP
Kyungsik Leef9b493a2013-07-08 16:01:48 -070063 select HAVE_KERNEL_LZ4
Russell Kingb1b3f492012-10-06 17:12:25 +010064 select HAVE_KERNEL_LZMA
65 select HAVE_KERNEL_LZO
66 select HAVE_KERNEL_XZ
Arnd Bergmanncb1293e2015-05-26 15:40:44 +010067 select HAVE_KPROBES if !XIP_KERNEL && !CPU_ENDIAN_BE32 && !CPU_V7M
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -080068 select HAVE_KRETPROBES if (HAVE_KPROBES)
Russell Kingb1b3f492012-10-06 17:12:25 +010069 select HAVE_MEMBLOCK
Ard Biesheuvel7d485f62014-11-24 16:54:35 +010070 select HAVE_MOD_ARCH_SPECIFIC
Petr Mladek42a0bb32016-05-20 17:00:33 -070071 select HAVE_NMI
Russell Kingb1b3f492012-10-06 17:12:25 +010072 select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
Wang Nan0dc016d2015-01-09 14:37:36 +080073 select HAVE_OPTPROBES if !THUMB2_KERNEL
Jamie Iles7ada1892010-02-02 20:24:58 +010074 select HAVE_PERF_EVENTS
Will Deacon49863892013-09-26 12:36:35 +010075 select HAVE_PERF_REGS
76 select HAVE_PERF_USER_STACK_DUMP
Steve Cappera0ad5492014-10-09 15:29:18 -070077 select HAVE_RCU_TABLE_FREE if (SMP && ARM_LPAE)
Will Deacone513f8b2010-06-25 12:24:53 +010078 select HAVE_REGS_AND_STACK_ACCESS_API
Russell Kingb1b3f492012-10-06 17:12:25 +010079 select HAVE_SYSCALL_TRACEPOINTS
Catalin Marinasaf1839e2012-10-08 16:28:08 -070080 select HAVE_UID16
Kevin Hilman31c1fc82013-09-16 15:28:22 -070081 select HAVE_VIRT_CPU_ACCOUNTING_GEN
Thomas Gleixnerda0ec6f2013-08-14 20:43:17 +010082 select IRQ_FORCED_THREADING
Russell King171b3f02013-09-12 21:24:42 +010083 select MODULES_USE_ELF_REL
Santosh Shilimkar84f452b2013-06-30 00:28:46 -040084 select NO_BOOTMEM
Arnd Bergmannaa7d5f12015-11-19 13:20:54 +010085 select OF_EARLY_FLATTREE if OF
86 select OF_RESERVED_MEM if OF
Russell King171b3f02013-09-12 21:24:42 +010087 select OLD_SIGACTION
88 select OLD_SIGSUSPEND3
Russell Kingb1b3f492012-10-06 17:12:25 +010089 select PERF_USE_VMALLOC
90 select RTC_LIB
91 select SYS_SUPPORTS_APM_EMULATION
Russell King171b3f02013-09-12 21:24:42 +010092 # Above selects are sorted alphabetically; please add new ones
93 # according to that. Thanks.
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 help
95 The ARM series is a line of low-power-consumption RISC chip designs
Martin Michlmayrf6c89652006-02-08 21:09:07 +000096 licensed by ARM Ltd and targeted at embedded applications and
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
Martin Michlmayrf6c89652006-02-08 21:09:07 +000098 manufactured, but legacy ARM-based PC hardware remains popular in
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 Europe. There is an ARM Linux project with a web page at
100 <http://www.arm.linux.org.uk/>.
101
Russell King74facff2011-06-02 11:16:22 +0100102config ARM_HAS_SG_CHAIN
Laura Abbott308c09f2014-08-08 14:23:25 -0700103 select ARCH_HAS_SG_CHAIN
Russell King74facff2011-06-02 11:16:22 +0100104 bool
105
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200106config NEED_SG_DMA_LENGTH
107 bool
108
109config ARM_DMA_USE_IOMMU
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200110 bool
Russell Kingb1b3f492012-10-06 17:12:25 +0100111 select ARM_HAS_SG_CHAIN
112 select NEED_SG_DMA_LENGTH
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200113
Seung-Woo Kim60460ab2013-02-06 13:21:14 +0900114if ARM_DMA_USE_IOMMU
115
116config ARM_DMA_IOMMU_ALIGNMENT
117 int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
118 range 4 9
119 default 8
120 help
121 DMA mapping framework by default aligns all buffers to the smallest
122 PAGE_SIZE order which is greater than or equal to the requested buffer
123 size. This works well for buffers up to a few hundreds kilobytes, but
124 for larger buffers it just a waste of address space. Drivers which has
125 relatively small addressing window (like 64Mib) might run out of
126 virtual space with just a few allocations.
127
128 With this parameter you can specify the maximum PAGE_SIZE order for
129 DMA IOMMU buffers. Larger buffers will be aligned only to this
130 specified order. The order is expressed as a power of two multiplied
131 by the PAGE_SIZE.
132
133endif
134
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +0100135config MIGHT_HAVE_PCI
136 bool
137
Ralf Baechle75e71532007-02-09 17:08:58 +0000138config SYS_SUPPORTS_APM_EMULATION
139 bool
140
Linus Walleijbc581772009-09-15 17:30:37 +0100141config HAVE_TCM
142 bool
143 select GENERIC_ALLOCATOR
144
Russell Kinge119bff2010-01-10 17:23:29 +0000145config HAVE_PROC_CPU
146 bool
147
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700148config NO_IOPORT_MAP
Al Viro5ea81762007-02-11 15:41:31 +0000149 bool
Al Viro5ea81762007-02-11 15:41:31 +0000150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151config EISA
152 bool
153 ---help---
154 The Extended Industry Standard Architecture (EISA) bus was
155 developed as an open alternative to the IBM MicroChannel bus.
156
157 The EISA bus provided some of the features of the IBM MicroChannel
158 bus while maintaining backward compatibility with cards made for
159 the older ISA bus. The EISA bus saw limited use between 1988 and
160 1995 when it was made obsolete by the PCI bus.
161
162 Say Y here if you are building a kernel for an EISA-based machine.
163
164 Otherwise, say N.
165
166config SBUS
167 bool
168
Russell Kingf16fb1e2007-04-28 09:59:37 +0100169config STACKTRACE_SUPPORT
170 bool
171 default y
172
173config LOCKDEP_SUPPORT
174 bool
175 default y
176
Russell King7ad1bcb2006-08-27 12:07:02 +0100177config TRACE_IRQFLAGS_SUPPORT
178 bool
Arnd Bergmanncb1293e2015-05-26 15:40:44 +0100179 default !CPU_V7M
Russell King7ad1bcb2006-08-27 12:07:02 +0100180
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181config RWSEM_XCHGADD_ALGORITHM
182 bool
Will Deacon8a874112014-05-02 17:06:19 +0100183 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
David Howellsf0d1b0b2006-12-08 02:37:49 -0800185config ARCH_HAS_ILOG2_U32
186 bool
David Howellsf0d1b0b2006-12-08 02:37:49 -0800187
188config ARCH_HAS_ILOG2_U64
189 bool
David Howellsf0d1b0b2006-12-08 02:37:49 -0800190
Eduardo Valentin4a1b5732013-06-13 22:58:52 +0100191config ARCH_HAS_BANDGAP
192 bool
193
Stefan Agnera5f4c562015-08-13 00:01:52 +0100194config FIX_EARLYCON_MEM
195 def_bool y if MMU
196
Akinobu Mitab89c3b12006-03-26 01:39:19 -0800197config GENERIC_HWEIGHT
198 bool
199 default y
200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201config GENERIC_CALIBRATE_DELAY
202 bool
203 default y
204
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100205config ARCH_MAY_HAVE_PC_FDC
206 bool
207
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800208config ZONE_DMA
209 bool
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800210
FUJITA Tomonoriccd7ab72010-03-10 15:23:23 -0800211config NEED_DMA_MAP_STATE
212 def_bool y
213
David A. Longc7edc9e2014-03-07 11:23:04 -0500214config ARCH_SUPPORTS_UPROBES
215 def_bool y
216
Rob Herring58af4a22012-03-20 14:33:01 -0500217config ARCH_HAS_DMA_SET_COHERENT_MASK
218 bool
219
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220config GENERIC_ISA_DMA
221 bool
222
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223config FIQ
224 bool
225
Rob Herring13a50452012-02-07 09:28:22 -0600226config NEED_RET_TO_USER
227 bool
228
Al Viro034d2f52005-12-19 16:27:59 -0500229config ARCH_MTD_XIP
230 bool
231
Hyok S. Choic760fc12006-03-27 15:18:50 +0100232config VECTORS_BASE
233 hex
Hyok S. Choi6afd6fa2006-09-28 21:46:34 +0900234 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
Hyok S. Choic760fc12006-03-27 15:18:50 +0100235 default DRAM_BASE if REMAP_VECTORS_TO_RAM
236 default 0x00000000
237 help
Russell King19accfd2013-07-04 11:40:32 +0100238 The base address of exception vectors. This must be two pages
239 in size.
Hyok S. Choic760fc12006-03-27 15:18:50 +0100240
Russell Kingdc21af92011-01-04 19:09:43 +0000241config ARM_PATCH_PHYS_VIRT
Russell Kingc1beced2011-08-10 10:23:45 +0100242 bool "Patch physical to virtual translations at runtime" if EMBEDDED
243 default y
Nicolas Pitreb511d752011-02-21 06:53:35 +0100244 depends on !XIP_KERNEL && MMU
Russell Kingdc21af92011-01-04 19:09:43 +0000245 help
Russell King111e9a52011-05-12 10:02:42 +0100246 Patch phys-to-virt and virt-to-phys translation functions at
247 boot and module load time according to the position of the
248 kernel in system memory.
Russell Kingdc21af92011-01-04 19:09:43 +0000249
Russell King111e9a52011-05-12 10:02:42 +0100250 This can only be used with non-XIP MMU kernels where the base
Nicolas Pitredaece592011-08-12 00:14:29 +0100251 of physical memory is at a 16MB boundary.
Russell Kingdc21af92011-01-04 19:09:43 +0000252
Russell Kingc1beced2011-08-10 10:23:45 +0100253 Only disable this option if you know that you do not require
254 this feature (eg, building a kernel for a single machine) and
255 you need to shrink the kernel to the minimal size.
256
Rob Herringc334bc12012-03-04 22:03:33 -0600257config NEED_MACH_IO_H
258 bool
259 help
260 Select this when mach/io.h is required to provide special
261 definitions for this platform. The need for mach/io.h should
262 be avoided when possible.
263
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400264config NEED_MACH_MEMORY_H
Nicolas Pitre1b9f95f2011-07-05 22:52:51 -0400265 bool
Russell King111e9a52011-05-12 10:02:42 +0100266 help
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400267 Select this when mach/memory.h is required to provide special
268 definitions for this platform. The need for mach/memory.h should
269 be avoided when possible.
Nicolas Pitre1b9f95f2011-07-05 22:52:51 -0400270
271config PHYS_OFFSET
Nicolas Pitre974c0722011-12-02 23:09:42 +0100272 hex "Physical address of main memory" if MMU
Uwe Kleine-Königc6f54a92014-07-23 20:37:43 +0100273 depends on !ARM_PATCH_PHYS_VIRT
Nicolas Pitre974c0722011-12-02 23:09:42 +0100274 default DRAM_BASE if !MMU
Uwe Kleine-Königc6f54a92014-07-23 20:37:43 +0100275 default 0x00000000 if ARCH_EBSA110 || \
Uwe Kleine-Königc6f54a92014-07-23 20:37:43 +0100276 ARCH_FOOTBRIDGE || \
277 ARCH_INTEGRATOR || \
278 ARCH_IOP13XX || \
279 ARCH_KS8695 || \
280 (ARCH_REALVIEW && !REALVIEW_HIGH_PHYS_OFFSET)
281 default 0x10000000 if ARCH_OMAP1 || ARCH_RPC
282 default 0x20000000 if ARCH_S5PV210
283 default 0x70000000 if REALVIEW_HIGH_PHYS_OFFSET
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
Rob Herringddb902c2013-11-22 09:29:37 -0600331 select ARCH_WANT_OPTIONAL_GPIOLIB
Olof Johansson42dc8362014-03-09 12:46:59 -0700332 select ARM_HAS_SG_CHAIN
Rob Herring387798b2012-09-06 13:41:12 -0500333 select ARM_PATCH_PHYS_VIRT
334 select AUTO_ZRELADDR
Rob Herring6d0add42014-04-16 08:42:13 -0500335 select CLKSRC_OF
Dinh Nguyen66314222012-07-18 16:07:18 -0600336 select COMMON_CLK
Rob Herringddb902c2013-11-22 09:29:37 -0600337 select GENERIC_CLOCKEVENTS
Will Deacon08d38be2014-05-27 23:26:35 +0100338 select MIGHT_HAVE_PCI
Rob Herring387798b2012-09-06 13:41:12 -0500339 select MULTI_IRQ_HANDLER
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
346 select ARCH_WANT_OPTIONAL_GPIOLIB
347 select ARM_NVIC
Stefan Agner499f1642015-05-21 00:35:44 +0200348 select AUTO_ZRELADDR
Stefan Agner9c77bc42015-05-20 00:03:51 +0200349 select CLKSRC_OF
350 select COMMON_CLK
351 select CPU_V7M
352 select GENERIC_CLOCKEVENTS
353 select NO_IOPORT_MAP
354 select SPARSE_IRQ
355 select USE_OF
356
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100357
Russell King93e22562012-10-12 14:20:52 +0100358config ARCH_CLPS711X
359 bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +0400360 select ARCH_REQUIRE_GPIOLIB
Alexander Shiyanea7d1bc2012-11-17 17:57:11 +0400361 select AUTO_ZRELADDR
Alexander Shiyanc99f72a2013-05-13 21:07:32 +0400362 select CLKSRC_MMIO
Russell King93e22562012-10-12 14:20:52 +0100363 select COMMON_CLK
364 select CPU_ARM720T
Alexander Shiyan4a8355c2012-10-10 19:45:27 +0400365 select GENERIC_CLOCKEVENTS
Alexander Shiyan65976192013-05-13 21:07:36 +0400366 select MFD_SYSCON
Alexander Shiyane4e3a372014-08-19 16:31:15 +0400367 select SOC_BUS
Russell King93e22562012-10-12 14:20:52 +0100368 help
369 Support for Cirrus Logic 711x/721x/731x based boards.
370
Russell King788c9702009-04-26 14:21:59 +0100371config ARCH_GEMINI
372 bool "Cortina Systems Gemini"
Russell King788c9702009-04-26 14:21:59 +0100373 select ARCH_REQUIRE_GPIOLIB
Linus Walleijf3372c02013-10-01 12:57:20 +0200374 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100375 select CPU_FA526
Linus Walleijf3372c02013-10-01 12:57:20 +0200376 select GENERIC_CLOCKEVENTS
Russell King788c9702009-04-26 14:21:59 +0100377 help
378 Support for the Cortina Systems Gemini family SoCs
379
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380config ARCH_EBSA110
381 bool "EBSA-110"
Russell Kingb1b3f492012-10-06 17:12:25 +0100382 select ARCH_USES_GETTIMEOFFSET
Russell Kingc7508152008-10-26 10:55:14 +0000383 select CPU_SA110
Russell Kingf7e68bb2005-05-05 14:49:01 +0100384 select ISA
Rob Herringc334bc12012-03-04 22:03:33 -0600385 select NEED_MACH_IO_H
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400386 select NEED_MACH_MEMORY_H
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700387 select NO_IOPORT_MAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 help
389 This is an evaluation board for the StrongARM processor available
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000390 from Digital. It has limited hardware on-board, including an
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 Ethernet interface, two PCMCIA sockets, two serial ports and a
392 parallel port.
393
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000394config ARCH_EP93XX
395 bool "EP93xx-based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100396 select ARCH_HAS_HOLES_MEMORYMODEL
397 select ARCH_REQUIRE_GPIOLIB
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000398 select ARM_AMBA
H Hartley Sweetenb8824c92015-06-15 10:35:06 -0700399 select ARM_PATCH_PHYS_VIRT
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000400 select ARM_VIC
H Hartley Sweetenb8824c92015-06-15 10:35:06 -0700401 select AUTO_ZRELADDR
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100402 select CLKDEV_LOOKUP
Linus Walleij000bc172015-06-15 14:34:03 +0200403 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100404 select CPU_ARM920T
Linus Walleij000bc172015-06-15 14:34:03 +0200405 select GENERIC_CLOCKEVENTS
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000406 help
407 This enables support for the Cirrus EP93xx series of CPUs.
408
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409config ARCH_FOOTBRIDGE
410 bool "FootBridge"
Russell Kingc7508152008-10-26 10:55:14 +0000411 select CPU_SA110
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 select FOOTBRIDGE
Russell King4e8d7632011-01-28 21:00:39 +0000413 select GENERIC_CLOCKEVENTS
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200414 select HAVE_IDE
Rob Herring8ef6e622012-03-01 20:48:12 -0600415 select NEED_MACH_IO_H if !MMU
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400416 select NEED_MACH_MEMORY_H
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000417 help
418 Support for systems based on the DC21285 companion chip
419 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100421config ARCH_NETX
422 bool "Hilscher NetX based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100423 select ARM_VIC
Russell King234b6ced2011-05-08 14:09:47 +0100424 select CLKSRC_MMIO
Russell Kingc7508152008-10-26 10:55:14 +0000425 select CPU_ARM926T
Uwe Kleine-König2fcfe6b2008-12-09 21:57:24 +0100426 select GENERIC_CLOCKEVENTS
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000427 help
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100428 This enables support for systems based on the Hilscher NetX Soc
429
Russell King3b938be2007-05-12 11:25:44 +0100430config ARCH_IOP13XX
431 bool "IOP13xx-based"
432 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100433 select CPU_XSC3
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400434 select NEED_MACH_MEMORY_H
Rob Herring13a50452012-02-07 09:28:22 -0600435 select NEED_RET_TO_USER
Russell Kingb1b3f492012-10-06 17:12:25 +0100436 select PCI
437 select PLAT_IOP
438 select VMSPLIT_1G
Thomas Gleixner37ebbcf2014-05-07 15:44:04 +0000439 select SPARSE_IRQ
Russell King3b938be2007-05-12 11:25:44 +0100440 help
441 Support for Intel's IOP13XX (XScale) family of processors.
442
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100443config ARCH_IOP32X
444 bool "IOP32x-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100445 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100446 select ARCH_REQUIRE_GPIOLIB
Russell Kingc7508152008-10-26 10:55:14 +0000447 select CPU_XSCALE
Linus Walleije9004f52013-09-09 11:59:51 +0200448 select GPIO_IOP
Rob Herring13a50452012-02-07 09:28:22 -0600449 select NEED_RET_TO_USER
Russell Kingf7e68bb2005-05-05 14:49:01 +0100450 select PCI
Russell Kingb1b3f492012-10-06 17:12:25 +0100451 select PLAT_IOP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000452 help
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100453 Support for Intel's 80219 and IOP32X (XScale) family of
454 processors.
455
456config ARCH_IOP33X
457 bool "IOP33x-based"
458 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100459 select ARCH_REQUIRE_GPIOLIB
Russell Kingc7508152008-10-26 10:55:14 +0000460 select CPU_XSCALE
Linus Walleije9004f52013-09-09 11:59:51 +0200461 select GPIO_IOP
Rob Herring13a50452012-02-07 09:28:22 -0600462 select NEED_RET_TO_USER
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100463 select PCI
Russell Kingb1b3f492012-10-06 17:12:25 +0100464 select PLAT_IOP
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100465 help
466 Support for Intel's IOP33X (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467
Russell King3b938be2007-05-12 11:25:44 +0100468config ARCH_IXP4XX
469 bool "IXP4xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100470 depends on MMU
Rob Herring58af4a22012-03-20 14:33:01 -0500471 select ARCH_HAS_DMA_SET_COHERENT_MASK
Russell Kingb1b3f492012-10-06 17:12:25 +0100472 select ARCH_REQUIRE_GPIOLIB
Russell King51aaf812014-04-22 22:26:27 +0100473 select ARCH_SUPPORTS_BIG_ENDIAN
Russell King234b6ced2011-05-08 14:09:47 +0100474 select CLKSRC_MMIO
Russell Kingc7508152008-10-26 10:55:14 +0000475 select CPU_XSCALE
Russell Kingb1b3f492012-10-06 17:12:25 +0100476 select DMABOUNCE if PCI
Russell King3b938be2007-05-12 11:25:44 +0100477 select GENERIC_CLOCKEVENTS
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +0100478 select MIGHT_HAVE_PCI
Rob Herringc334bc12012-03-04 22:03:33 -0600479 select NEED_MACH_IO_H
Florian Fainelli9296d942013-04-09 14:29:26 +0200480 select USB_EHCI_BIG_ENDIAN_DESC
Russell King171b3f02013-09-12 21:24:42 +0100481 select USB_EHCI_BIG_ENDIAN_MMIO
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100482 help
Russell King3b938be2007-05-12 11:25:44 +0100483 Support for Intel's IXP4XX (XScale) family of processors.
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100484
Saeed Bisharaedabd382009-08-06 15:12:43 +0300485config ARCH_DOVE
486 bool "Marvell Dove"
Saeed Bisharaedabd382009-08-06 15:12:43 +0300487 select ARCH_REQUIRE_GPIOLIB
Sebastian Hesselbarth756b2532013-05-02 19:56:12 +0100488 select CPU_PJ4
Saeed Bisharaedabd382009-08-06 15:12:43 +0300489 select GENERIC_CLOCKEVENTS
Russell King0f81bd42012-09-09 20:34:13 +0100490 select MIGHT_HAVE_PCI
Arnd Bergmannb8cd3372015-12-02 22:27:04 +0100491 select MULTI_IRQ_HANDLER
Russell King171b3f02013-09-12 21:24:42 +0100492 select MVEBU_MBUS
Sebastian Hesselbarth9139acd2012-11-19 10:39:55 +0100493 select PINCTRL
494 select PINCTRL_DOVE
Thomas Petazzoniabcda1d2012-09-11 14:27:27 +0200495 select PLAT_ORION_LEGACY
Arnd Bergmann5cdbe5d2015-12-02 22:27:05 +0100496 select SPARSE_IRQ
Russell Kingc5d431e2015-12-08 10:58:09 +0000497 select PM_GENERIC_DOMAINS if PM
Saeed Bisharaedabd382009-08-06 15:12:43 +0300498 help
499 Support for the Marvell Dove SoC 88AP510
500
Andrew Victorc53c9cf2007-05-11 21:01:28 +0100501config ARCH_KS8695
502 bool "Micrel/Kendin KS8695"
Hartley Sweeten98830bc2010-05-17 17:18:10 +0100503 select ARCH_REQUIRE_GPIOLIB
Linus Walleijc7e783d2012-08-29 20:27:22 +0200504 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100505 select CPU_ARM922T
Linus Walleijc7e783d2012-08-29 20:27:22 +0200506 select GENERIC_CLOCKEVENTS
Russell Kingb1b3f492012-10-06 17:12:25 +0100507 select NEED_MACH_MEMORY_H
Andrew Victorc53c9cf2007-05-11 21:01:28 +0100508 help
509 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
510 System-on-Chip devices.
511
Russell King788c9702009-04-26 14:21:59 +0100512config ARCH_W90X900
513 bool "Nuvoton W90X900 CPU"
wanzongshunc52d3d62009-06-10 15:49:32 +0100514 select ARCH_REQUIRE_GPIOLIB
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100515 select CLKDEV_LOOKUP
Russell King6fa5d5f2011-05-08 15:34:39 +0100516 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100517 select CPU_ARM926T
wanzongshun58b53692009-08-14 15:36:44 +0100518 select GENERIC_CLOCKEVENTS
Lennert Buytenhek777f9be2008-06-22 22:45:02 +0200519 help
wanzongshuna8bc4ea2009-08-14 15:38:29 +0100520 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
521 At present, the w90x900 has been renamed nuc900, regarding
522 the ARM series product line, you can login the following
523 link address to know more.
524
525 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
526 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
Tzachi Perelstein585cf172007-10-23 15:14:41 -0400527
Russell King93e22562012-10-12 14:20:52 +0100528config ARCH_LPC32XX
529 bool "NXP LPC32XX"
530 select ARCH_REQUIRE_GPIOLIB
531 select ARM_AMBA
Russell King40737232011-01-06 22:32:52 +0000532 select CLKDEV_LOOKUP
Vladimir Zapolskiyc227f122015-11-20 03:05:10 +0200533 select CLKSRC_LPC32XX
534 select COMMON_CLK
Russell King93e22562012-10-12 14:20:52 +0100535 select CPU_ARM926T
536 select GENERIC_CLOCKEVENTS
Vladimir Zapolskiy8cb17b52016-04-25 04:00:38 +0300537 select MULTI_IRQ_HANDLER
538 select SPARSE_IRQ
Russell King93e22562012-10-12 14:20:52 +0100539 select USE_OF
540 help
541 Support for the NXP LPC32XX family of processors
542
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543config ARCH_PXA
eric miao2c8086a2007-09-11 19:13:17 -0700544 bool "PXA2xx/PXA3xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100545 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100546 select ARCH_MTD_XIP
547 select ARCH_REQUIRE_GPIOLIB
548 select ARM_CPU_SUSPEND if PM
549 select AUTO_ZRELADDR
Robert Jarzmika1c0a6a2015-02-07 22:54:03 +0100550 select COMMON_CLK
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100551 select CLKDEV_LOOKUP
Daniel Lezcano389d9b52015-10-09 15:48:38 +0200552 select CLKSRC_PXA
Russell King234b6ced2011-05-08 14:09:47 +0100553 select CLKSRC_MMIO
Robert Jarzmik6f6caea2014-07-14 18:52:03 +0200554 select CLKSRC_OF
Arnd Bergmann2f202862016-01-29 15:06:29 +0100555 select CPU_XSCALE if !CPU_XSC3
Eric Miao981d0f32007-07-24 01:22:43 +0100556 select GENERIC_CLOCKEVENTS
Haojian Zhuang157d2642011-10-17 20:37:52 +0800557 select GPIO_PXA
Russell Kingb1b3f492012-10-06 17:12:25 +0100558 select HAVE_IDE
Robert Jarzmikd6cf30c2015-02-14 22:41:56 +0100559 select IRQ_DOMAIN
Russell Kingb1b3f492012-10-06 17:12:25 +0100560 select MULTI_IRQ_HANDLER
Eric Miaobd5ce432009-01-20 12:06:01 +0800561 select PLAT_PXA
Haojian Zhuang6ac6b812010-08-20 15:23:59 +0800562 select SPARSE_IRQ
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000563 help
eric miao2c8086a2007-09-11 19:13:17 -0700564 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565
566config ARCH_RPC
567 bool "RiscPC"
Russell King868e87c2015-09-28 10:31:50 +0100568 depends on MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 select ARCH_ACORN
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100570 select ARCH_MAY_HAVE_PC_FDC
Russell King07f841b2008-10-01 17:11:06 +0100571 select ARCH_SPARSEMEM_ENABLE
John Stultz5cfc8ee2010-03-24 00:22:36 +0000572 select ARCH_USES_GETTIMEOFFSET
Arnd Bergmannfa04e202014-02-26 17:39:12 +0100573 select CPU_SA110
Russell Kingb1b3f492012-10-06 17:12:25 +0100574 select FIQ
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200575 select HAVE_IDE
Russell Kingb1b3f492012-10-06 17:12:25 +0100576 select HAVE_PATA_PLATFORM
577 select ISA_DMA_API
Rob Herringc334bc12012-03-04 22:03:33 -0600578 select NEED_MACH_IO_H
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400579 select NEED_MACH_MEMORY_H
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700580 select NO_IOPORT_MAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 help
582 On the Acorn Risc-PC, Linux can support the internal IDE disk and
583 CD-ROM interface, serial and parallel port, and the floppy drive.
584
585config ARCH_SA1100
586 bool "SA1100-based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100587 select ARCH_MTD_XIP
Michael Buesch7444a722008-07-25 01:46:11 -0700588 select ARCH_REQUIRE_GPIOLIB
Russell Kingb1b3f492012-10-06 17:12:25 +0100589 select ARCH_SPARSEMEM_ENABLE
590 select CLKDEV_LOOKUP
591 select CLKSRC_MMIO
Daniel Lezcano389d9b52015-10-09 15:48:38 +0200592 select CLKSRC_PXA
593 select CLKSRC_OF if OF
Russell Kingb1b3f492012-10-06 17:12:25 +0100594 select CPU_FREQ
595 select CPU_SA1100
596 select GENERIC_CLOCKEVENTS
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200597 select HAVE_IDE
Dmitry Eremin-Solenikov1eca42b2014-11-28 15:56:54 +0100598 select IRQ_DOMAIN
Russell Kingb1b3f492012-10-06 17:12:25 +0100599 select ISA
Dmitry Eremin-Solenikovaffcab32014-11-28 15:55:16 +0100600 select MULTI_IRQ_HANDLER
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400601 select NEED_MACH_MEMORY_H
Russell King375dec92012-02-23 14:29:33 +0100602 select SPARSE_IRQ
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000603 help
604 Support for StrongARM 11x0 based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900606config ARCH_S3C24XX
607 bool "Samsung S3C24XX SoCs"
Kukjin Kim53650432013-04-04 09:04:30 +0900608 select ARCH_REQUIRE_GPIOLIB
Arnd Bergmann335cce72014-03-13 14:11:16 +0100609 select ATAGS
Russell Kingb1b3f492012-10-06 17:12:25 +0100610 select CLKDEV_LOOKUP
Tomasz Figa42805062013-04-28 02:25:01 +0200611 select CLKSRC_SAMSUNG_PWM
Romain Naour7f78b6e2013-01-09 18:47:04 -0800612 select GENERIC_CLOCKEVENTS
Tomasz Figa880cf072013-06-19 01:22:20 +0900613 select GPIO_SAMSUNG
Kukjin Kim20676c12010-11-13 16:08:32 +0900614 select HAVE_S3C2410_I2C if I2C
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900615 select HAVE_S3C2410_WATCHDOG if WATCHDOG
Russell Kingb1b3f492012-10-06 17:12:25 +0100616 select HAVE_S3C_RTC if RTC_CLASS
Heiko Stuebner17453dd2013-03-07 12:38:25 +0900617 select MULTI_IRQ_HANDLER
Rob Herringc334bc12012-03-04 22:03:33 -0600618 select NEED_MACH_IO_H
Tomasz Figacd8dc7a2013-06-15 09:01:49 +0900619 select SAMSUNG_ATAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 help
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900621 Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
622 and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
623 (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
624 Samsung SMDK2410 development board (and derivatives).
Ben Dooks63b1f512010-04-30 16:32:26 +0900625
Kevin Hilman7c6337e2007-04-30 19:37:19 +0100626config ARCH_DAVINCI
627 bool "TI DaVinci"
Russell Kingb1b3f492012-10-06 17:12:25 +0100628 select ARCH_HAS_HOLES_MEMORYMODEL
David Brownelldce11152008-09-07 23:41:04 -0700629 select ARCH_REQUIRE_GPIOLIB
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100630 select CLKDEV_LOOKUP
Arnd Bergmannce32c5c2016-02-01 21:35:57 +0100631 select CPU_ARM926T
David Brownell20e99692009-05-07 09:31:42 -0700632 select GENERIC_ALLOCATOR
Russell Kingb1b3f492012-10-06 17:12:25 +0100633 select GENERIC_CLOCKEVENTS
Russell Kingdc7ad3b2011-05-22 10:01:21 +0100634 select GENERIC_IRQ_CHIP
Russell Kingb1b3f492012-10-06 17:12:25 +0100635 select HAVE_IDE
Sekhar Nori689e3312012-08-28 15:27:52 +0530636 select USE_OF
Russell Kingb1b3f492012-10-06 17:12:25 +0100637 select ZONE_DMA
Kevin Hilman7c6337e2007-04-30 19:37:19 +0100638 help
639 Support for TI's DaVinci platform.
640
Tony Lindgrena0694862013-01-11 11:24:20 -0800641config ARCH_OMAP1
642 bool "TI OMAP1"
Arnd Bergmann00a36692012-06-07 18:50:51 -0600643 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100644 select ARCH_HAS_HOLES_MEMORYMODEL
Tony Lindgrena0694862013-01-11 11:24:20 -0800645 select ARCH_OMAP
Alexey Charkov21f47fb2010-12-23 13:11:21 +0100646 select ARCH_REQUIRE_GPIOLIB
Tony Priske9a91de2012-08-03 21:00:06 +1200647 select CLKDEV_LOOKUP
viresh kumarcee37e52010-04-01 12:31:05 +0100648 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100649 select GENERIC_CLOCKEVENTS
Tony Lindgrena0694862013-01-11 11:24:20 -0800650 select GENERIC_IRQ_CHIP
Tony Lindgrena0694862013-01-11 11:24:20 -0800651 select HAVE_IDE
652 select IRQ_DOMAIN
Tony Lindgrenb6943312015-05-20 09:01:21 -0700653 select MULTI_IRQ_HANDLER
Tony Lindgrena0694862013-01-11 11:24:20 -0800654 select NEED_MACH_IO_H if PCCARD
655 select NEED_MACH_MEMORY_H
Tony Lindgren685e2d02015-05-20 09:01:21 -0700656 select SPARSE_IRQ
Alexey Charkov21f47fb2010-12-23 13:11:21 +0100657 help
Tony Lindgrena0694862013-01-11 11:24:20 -0800658 Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
Binghua Duan02c981c2011-07-08 17:40:12 +0800659
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660endchoice
661
Rob Herring387798b2012-09-06 13:41:12 -0500662menu "Multiple platform selection"
663 depends on ARCH_MULTIPLATFORM
664
665comment "CPU Core family selection"
666
Arnd Bergmannf8afae42014-03-25 22:19:00 +0100667config ARCH_MULTI_V4
668 bool "ARMv4 based platforms (FA526)"
669 depends on !ARCH_MULTI_V6_V7
670 select ARCH_MULTI_V4_V5
671 select CPU_FA526
672
Rob Herring387798b2012-09-06 13:41:12 -0500673config ARCH_MULTI_V4T
674 bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
Rob Herring387798b2012-09-06 13:41:12 -0500675 depends on !ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100676 select ARCH_MULTI_V4_V5
Arnd Bergmann24e860f2013-06-03 15:38:58 +0200677 select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
678 CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
679 CPU_ARM925T || CPU_ARM940T)
Rob Herring387798b2012-09-06 13:41:12 -0500680
681config ARCH_MULTI_V5
682 bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
Rob Herring387798b2012-09-06 13:41:12 -0500683 depends on !ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100684 select ARCH_MULTI_V4_V5
Andrew Lunn12567bb2014-02-22 20:14:54 +0100685 select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \
Arnd Bergmann24e860f2013-06-03 15:38:58 +0200686 CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
687 CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
Rob Herring387798b2012-09-06 13:41:12 -0500688
689config ARCH_MULTI_V4_V5
690 bool
691
692config ARCH_MULTI_V6
Stephen Boyd8dda05c2013-03-04 15:19:19 -0800693 bool "ARMv6 based platforms (ARM11)"
Rob Herring387798b2012-09-06 13:41:12 -0500694 select ARCH_MULTI_V6_V7
Rob Herring42f47542014-01-31 14:26:04 -0600695 select CPU_V6K
Rob Herring387798b2012-09-06 13:41:12 -0500696
697config ARCH_MULTI_V7
Stephen Boyd8dda05c2013-03-04 15:19:19 -0800698 bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
Rob Herring387798b2012-09-06 13:41:12 -0500699 default y
700 select ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100701 select CPU_V7
Rob Herring90bc8ac2014-01-31 15:32:02 -0600702 select HAVE_SMP
Rob Herring387798b2012-09-06 13:41:12 -0500703
704config ARCH_MULTI_V6_V7
705 bool
Rob Herring9352b052014-01-31 15:36:10 -0600706 select MIGHT_HAVE_CACHE_L2X0
Rob Herring387798b2012-09-06 13:41:12 -0500707
708config ARCH_MULTI_CPU_AUTO
709 def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
710 select ARCH_MULTI_V5
711
712endmenu
713
Rob Herring05e2a3d2013-12-05 10:04:54 -0600714config ARCH_VIRT
Masahiro Yamadae3246542015-11-16 12:06:10 +0900715 bool "Dummy Virtual Machine"
716 depends on ARCH_MULTI_V7
Rob Herring4b8b5f22013-12-05 10:10:34 -0600717 select ARM_AMBA
Rob Herring05e2a3d2013-12-05 10:04:54 -0600718 select ARM_GIC
Pavel Fedin0e2f91e2015-11-27 12:56:26 +0100719 select ARM_GIC_V2M if PCI_MSI
Jean-Philippe Brucker0b28f1d2015-10-01 13:47:18 +0100720 select ARM_GIC_V3
Rob Herring05e2a3d2013-12-05 10:04:54 -0600721 select ARM_PSCI
Rob Herring4b8b5f22013-12-05 10:10:34 -0600722 select HAVE_ARM_ARCH_TIMER
Rob Herring05e2a3d2013-12-05 10:04:54 -0600723
Russell Kingccf50e22010-03-15 19:03:06 +0000724#
725# This is sorted alphabetically by mach-* pathname. However, plat-*
726# Kconfigs may be included either alphabetically (according to the
727# plat- suffix) or along side the corresponding mach-* source.
728#
Gregory CLEMENT3e93a222012-06-04 18:38:56 +0200729source "arch/arm/mach-mvebu/Kconfig"
730
Tsahee Zidenberg445d9b32015-03-12 13:53:00 +0200731source "arch/arm/mach-alpine/Kconfig"
732
Lars Persson590b4602016-02-11 17:06:19 +0100733source "arch/arm/mach-artpec/Kconfig"
734
Oleksij Rempeld9bfc862014-11-24 12:08:27 +0100735source "arch/arm/mach-asm9260/Kconfig"
736
Russell King95b8f202010-01-14 11:43:54 +0000737source "arch/arm/mach-at91/Kconfig"
738
Anders Berg1d22924e2014-05-23 11:08:35 +0200739source "arch/arm/mach-axxia/Kconfig"
740
Christian Daudt8ac49e02012-11-19 09:46:10 -0800741source "arch/arm/mach-bcm/Kconfig"
742
Sebastian Hesselbarth1c37fa12013-09-09 14:36:19 +0200743source "arch/arm/mach-berlin/Kconfig"
744
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745source "arch/arm/mach-clps711x/Kconfig"
746
Anton Vorontsovd94f9442010-03-25 17:12:41 +0300747source "arch/arm/mach-cns3xxx/Kconfig"
748
Russell King95b8f202010-01-14 11:43:54 +0000749source "arch/arm/mach-davinci/Kconfig"
750
Baruch Siachdf8d7422015-01-14 10:40:30 +0200751source "arch/arm/mach-digicolor/Kconfig"
752
Russell King95b8f202010-01-14 11:43:54 +0000753source "arch/arm/mach-dove/Kconfig"
754
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000755source "arch/arm/mach-ep93xx/Kconfig"
756
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757source "arch/arm/mach-footbridge/Kconfig"
758
Paulius Zaleckas59d3a192009-03-26 10:06:08 +0200759source "arch/arm/mach-gemini/Kconfig"
760
Rob Herring387798b2012-09-06 13:41:12 -0500761source "arch/arm/mach-highbank/Kconfig"
762
Haojian Zhuang389ee0c2013-12-20 10:52:56 +0800763source "arch/arm/mach-hisi/Kconfig"
764
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765source "arch/arm/mach-integrator/Kconfig"
766
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100767source "arch/arm/mach-iop32x/Kconfig"
768
769source "arch/arm/mach-iop33x/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770
Dan Williams285f5fa2006-12-07 02:59:39 +0100771source "arch/arm/mach-iop13xx/Kconfig"
772
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773source "arch/arm/mach-ixp4xx/Kconfig"
774
Santosh Shilimkar828989a2013-06-10 11:27:13 -0400775source "arch/arm/mach-keystone/Kconfig"
776
Russell King95b8f202010-01-14 11:43:54 +0000777source "arch/arm/mach-ks8695/Kconfig"
778
Carlo Caione3b8f5032014-09-10 22:16:59 +0200779source "arch/arm/mach-meson/Kconfig"
780
Jonas Jensen17723fd32013-12-18 13:58:45 +0100781source "arch/arm/mach-moxart/Kconfig"
782
Joel Stanley8c2ed9b2016-03-21 17:22:31 +1030783source "arch/arm/mach-aspeed/Kconfig"
784
Stanislav Samsonov794d15b2008-06-22 22:45:10 +0200785source "arch/arm/mach-mv78xx0/Kconfig"
786
Shawn Guo3995eb82012-09-13 19:48:07 +0800787source "arch/arm/mach-imx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
Matthias Bruggerf682a212014-05-13 01:06:13 +0200789source "arch/arm/mach-mediatek/Kconfig"
790
Shawn Guo1d3f33d2010-12-13 20:55:03 +0800791source "arch/arm/mach-mxs/Kconfig"
792
Russell King95b8f202010-01-14 11:43:54 +0000793source "arch/arm/mach-netx/Kconfig"
Eric Miao49cbe782009-01-20 14:15:18 +0800794
Russell King95b8f202010-01-14 11:43:54 +0000795source "arch/arm/mach-nomadik/Kconfig"
Russell King95b8f202010-01-14 11:43:54 +0000796
Daniel Tang9851ca52013-06-11 18:40:17 +1000797source "arch/arm/mach-nspire/Kconfig"
798
Tony Lindgrend48af152005-07-10 19:58:17 +0100799source "arch/arm/plat-omap/Kconfig"
800
801source "arch/arm/mach-omap1/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802
Tony Lindgren1dbae812005-11-10 14:26:51 +0000803source "arch/arm/mach-omap2/Kconfig"
804
Lennert Buytenhek9dd0b192008-03-27 14:51:41 -0400805source "arch/arm/mach-orion5x/Kconfig"
Tzachi Perelstein585cf172007-10-23 15:14:41 -0400806
Rob Herring387798b2012-09-06 13:41:12 -0500807source "arch/arm/mach-picoxcell/Kconfig"
808
Russell King95b8f202010-01-14 11:43:54 +0000809source "arch/arm/mach-pxa/Kconfig"
810source "arch/arm/plat-pxa/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811
Russell King95b8f202010-01-14 11:43:54 +0000812source "arch/arm/mach-mmp/Kconfig"
813
Neil Armstrong8c9184b2016-03-03 10:42:15 +0100814source "arch/arm/mach-oxnas/Kconfig"
815
Kumar Gala8fc1b0f2014-01-21 17:14:10 -0600816source "arch/arm/mach-qcom/Kconfig"
817
Russell King95b8f202010-01-14 11:43:54 +0000818source "arch/arm/mach-realview/Kconfig"
819
Heiko Stuebnerd63dc052013-06-02 23:09:41 +0200820source "arch/arm/mach-rockchip/Kconfig"
821
Russell King95b8f202010-01-14 11:43:54 +0000822source "arch/arm/mach-sa1100/Kconfig"
Saeed Bisharaedabd382009-08-06 15:12:43 +0300823
Rob Herring387798b2012-09-06 13:41:12 -0500824source "arch/arm/mach-socfpga/Kconfig"
825
Arnd Bergmanna7ed0992012-12-02 15:12:47 +0100826source "arch/arm/mach-spear/Kconfig"
Ben Dooksa21765a2007-02-11 18:31:01 +0100827
Srinivas Kandagatla65ebcc12013-06-25 12:15:10 +0100828source "arch/arm/mach-sti/Kconfig"
829
Kukjin Kim85fd6d62012-02-06 09:38:19 +0900830source "arch/arm/mach-s3c24xx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831
Ben Dooks431107e2010-01-26 10:11:04 +0900832source "arch/arm/mach-s3c64xx/Kconfig"
Ben Dooksa08ab632008-10-21 14:06:39 +0100833
Kukjin Kim170f4e42010-02-24 16:40:44 +0900834source "arch/arm/mach-s5pv210/Kconfig"
835
Kukjin Kim83014572011-11-06 13:54:56 +0900836source "arch/arm/mach-exynos/Kconfig"
Rob Herringe509b282014-06-10 09:06:09 -0500837source "arch/arm/plat-samsung/Kconfig"
Changhwan Youncc0e72b2010-07-16 12:15:38 +0900838
Russell King882d01f2010-03-02 23:40:15 +0000839source "arch/arm/mach-shmobile/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840
Maxime Ripard3b526342012-11-08 12:40:16 +0100841source "arch/arm/mach-sunxi/Kconfig"
842
Barry Song156a0992012-08-23 13:41:58 +0800843source "arch/arm/mach-prima2/Kconfig"
844
Marc Gonzalezd6de5b02015-12-15 10:41:13 +0100845source "arch/arm/mach-tango/Kconfig"
846
Erik Gillingc5f80062010-01-21 16:53:02 -0800847source "arch/arm/mach-tegra/Kconfig"
848
Russell King95b8f202010-01-14 11:43:54 +0000849source "arch/arm/mach-u300/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
Masahiro Yamadaba56a982015-05-08 13:07:11 +0900851source "arch/arm/mach-uniphier/Kconfig"
852
Russell King95b8f202010-01-14 11:43:54 +0000853source "arch/arm/mach-ux500/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854
855source "arch/arm/mach-versatile/Kconfig"
856
Russell Kingceade892010-02-11 21:44:53 +0000857source "arch/arm/mach-vexpress/Kconfig"
Russell King420c34e2011-01-18 20:08:06 +0000858source "arch/arm/plat-versatile/Kconfig"
Russell Kingceade892010-02-11 21:44:53 +0000859
Tony Prisk6f35f9a2012-10-11 20:13:09 +1300860source "arch/arm/mach-vt8500/Kconfig"
861
wanzongshun7ec80dd2008-12-03 03:55:38 +0100862source "arch/arm/mach-w90x900/Kconfig"
863
Jun Nieacede512015-04-28 17:18:05 +0800864source "arch/arm/mach-zx/Kconfig"
865
Josh Cartwright9a45eb62012-11-19 11:38:29 -0600866source "arch/arm/mach-zynq/Kconfig"
867
Stefan Agner499f1642015-05-21 00:35:44 +0200868# ARMv7-M architecture
869config ARCH_EFM32
870 bool "Energy Micro efm32"
871 depends on ARM_SINGLE_ARMV7M
872 select ARCH_REQUIRE_GPIOLIB
873 help
874 Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko
875 processors.
876
877config ARCH_LPC18XX
878 bool "NXP LPC18xx/LPC43xx"
879 depends on ARM_SINGLE_ARMV7M
880 select ARCH_HAS_RESET_CONTROLLER
881 select ARM_AMBA
882 select CLKSRC_LPC32XX
883 select PINCTRL
884 help
885 Support for NXP's LPC18xx Cortex-M3 and LPC43xx Cortex-M4
886 high performance microcontrollers.
887
888config ARCH_STM32
889 bool "STMicrolectronics STM32"
890 depends on ARM_SINGLE_ARMV7M
891 select ARCH_HAS_RESET_CONTROLLER
892 select ARMV7M_SYSTICK
Maxime Coquelin25263182015-05-22 23:50:52 +0200893 select CLKSRC_STM32
Maxime Coquelinf64e9802015-10-14 18:32:42 +0200894 select PINCTRL
Stefan Agner499f1642015-05-21 00:35:44 +0200895 select RESET_CONTROLLER
896 help
897 Support for STMicroelectronics STM32 processors.
898
Maxime Coquelinfa65fc62015-10-14 18:21:32 +0200899config MACH_STM32F429
900 bool "STMicrolectronics STM32F429"
901 depends on ARCH_STM32
902 default y
903
Vladimir Murzin18471192016-04-25 09:49:13 +0100904config ARCH_MPS2
905 bool "ARM MPS2 paltform"
906 depends on ARM_SINGLE_ARMV7M
907 select ARM_AMBA
908 select CLKSRC_MPS2
909 help
910 Support for Cortex-M Prototyping System (or V2M-MPS2) which comes
911 with a range of available cores like Cortex-M3/M4/M7.
912
913 Please, note that depends which Application Note is used memory map
914 for the platform may vary, so adjustment of RAM base might be needed.
915
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916# Definitions to make life easier
917config ARCH_ACORN
918 bool
919
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100920config PLAT_IOP
921 bool
Mikael Pettersson469d30442009-10-29 11:46:54 -0700922 select GENERIC_CLOCKEVENTS
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100923
Lennert Buytenhek69b02f62008-03-27 14:51:39 -0400924config PLAT_ORION
925 bool
Russell Kingbfe45e02011-05-08 15:33:30 +0100926 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100927 select COMMON_CLK
Russell Kingdc7ad3b2011-05-22 10:01:21 +0100928 select GENERIC_IRQ_CHIP
Andrew Lunn278b45b2012-06-27 13:40:04 +0200929 select IRQ_DOMAIN
Lennert Buytenhek69b02f62008-03-27 14:51:39 -0400930
Thomas Petazzoniabcda1d2012-09-11 14:27:27 +0200931config PLAT_ORION_LEGACY
932 bool
933 select PLAT_ORION
934
Eric Miaobd5ce432009-01-20 12:06:01 +0800935config PLAT_PXA
936 bool
937
Russell Kingf4b8b312010-01-14 12:48:06 +0000938config PLAT_VERSATILE
939 bool
940
Alexandre Courbotd9a1bea2013-11-24 15:30:46 +0900941source "arch/arm/firmware/Kconfig"
942
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943source arch/arm/mm/Kconfig
944
Lennert Buytenhekafe4b252006-12-03 18:51:14 +0100945config IWMMXT
Sebastian Hesselbarthd93003e2014-04-24 22:58:30 +0100946 bool "Enable iWMMXt support"
947 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B
948 default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B
Lennert Buytenhekafe4b252006-12-03 18:51:14 +0100949 help
950 Enable support for iWMMXt context switching at run time if
951 running on a CPU that supports it.
952
eric miao52108642010-12-13 09:42:34 +0100953config MULTI_IRQ_HANDLER
954 bool
955 help
956 Allow each machine to specify it's own IRQ handler at run time.
957
Hyok S. Choi3b93e7b2006-06-22 11:48:56 +0100958if !MMU
959source "arch/arm/Kconfig-nommu"
960endif
961
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100962config PJ4B_ERRATA_4742
963 bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
964 depends on CPU_PJ4B && MACH_ARMADA_370
965 default y
966 help
967 When coming out of either a Wait for Interrupt (WFI) or a Wait for
968 Event (WFE) IDLE states, a specific timing sensitivity exists between
969 the retiring WFI/WFE instructions and the newly issued subsequent
970 instructions. This sensitivity can result in a CPU hang scenario.
971 Workaround:
972 The software must insert either a Data Synchronization Barrier (DSB)
973 or Data Memory Barrier (DMB) command immediately after the WFI/WFE
974 instruction
975
Will Deaconf0c4b8d2012-04-20 17:20:08 +0100976config ARM_ERRATA_326103
977 bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
978 depends on CPU_V6
979 help
980 Executing a SWP instruction to read-only memory does not set bit 11
981 of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
982 treat the access as a read, preventing a COW from occurring and
983 causing the faulting task to livelock.
984
Catalin Marinas9cba3cc2009-04-30 17:06:03 +0100985config ARM_ERRATA_411920
986 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
Russell Kinge399b1a2011-01-17 15:08:32 +0000987 depends on CPU_V6 || CPU_V6K
Catalin Marinas9cba3cc2009-04-30 17:06:03 +0100988 help
989 Invalidation of the Instruction Cache operation can
990 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
991 It does not affect the MPCore. This option enables the ARM Ltd.
992 recommended workaround.
993
Catalin Marinas7ce236f2009-04-30 17:06:09 +0100994config ARM_ERRATA_430973
995 bool "ARM errata: Stale prediction on replaced interworking branch"
996 depends on CPU_V7
997 help
998 This option enables the workaround for the 430973 Cortex-A8
Russell King79403cd2015-04-13 16:14:37 +0100999 r1p* erratum. If a code sequence containing an ARM/Thumb
Catalin Marinas7ce236f2009-04-30 17:06:09 +01001000 interworking branch is replaced with another code sequence at the
1001 same virtual address, whether due to self-modifying code or virtual
1002 to physical address re-mapping, Cortex-A8 does not recover from the
1003 stale interworking branch prediction. This results in Cortex-A8
1004 executing the new code sequence in the incorrect ARM or Thumb state.
1005 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1006 and also flushes the branch target cache at every context switch.
1007 Note that setting specific bits in the ACTLR register may not be
1008 available in non-secure mode.
1009
Catalin Marinas855c5512009-04-30 17:06:15 +01001010config ARM_ERRATA_458693
1011 bool "ARM errata: Processor deadlock when a false hazard is created"
1012 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001013 depends on !ARCH_MULTIPLATFORM
Catalin Marinas855c5512009-04-30 17:06:15 +01001014 help
1015 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1016 erratum. For very specific sequences of memory operations, it is
1017 possible for a hazard condition intended for a cache line to instead
1018 be incorrectly associated with a different cache line. This false
1019 hazard might then cause a processor deadlock. The workaround enables
1020 the L1 caching of the NEON accesses and disables the PLD instruction
1021 in the ACTLR register. Note that setting specific bits in the ACTLR
1022 register may not be available in non-secure mode.
1023
Catalin Marinas0516e462009-04-30 17:06:20 +01001024config ARM_ERRATA_460075
1025 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1026 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001027 depends on !ARCH_MULTIPLATFORM
Catalin Marinas0516e462009-04-30 17:06:20 +01001028 help
1029 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1030 erratum. Any asynchronous access to the L2 cache may encounter a
1031 situation in which recent store transactions to the L2 cache are lost
1032 and overwritten with stale memory contents from external memory. The
1033 workaround disables the write-allocate mode for the L2 cache via the
1034 ACTLR register. Note that setting specific bits in the ACTLR register
1035 may not be available in non-secure mode.
1036
Will Deacon9f050272010-09-14 09:51:43 +01001037config ARM_ERRATA_742230
1038 bool "ARM errata: DMB operation may be faulty"
1039 depends on CPU_V7 && SMP
Rob Herring62e4d352012-12-21 22:42:40 +01001040 depends on !ARCH_MULTIPLATFORM
Will Deacon9f050272010-09-14 09:51:43 +01001041 help
1042 This option enables the workaround for the 742230 Cortex-A9
1043 (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1044 between two write operations may not ensure the correct visibility
1045 ordering of the two writes. This workaround sets a specific bit in
1046 the diagnostic register of the Cortex-A9 which causes the DMB
1047 instruction to behave as a DSB, ensuring the correct behaviour of
1048 the two writes.
1049
Will Deacona672e992010-09-14 09:53:02 +01001050config ARM_ERRATA_742231
1051 bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1052 depends on CPU_V7 && SMP
Rob Herring62e4d352012-12-21 22:42:40 +01001053 depends on !ARCH_MULTIPLATFORM
Will Deacona672e992010-09-14 09:53:02 +01001054 help
1055 This option enables the workaround for the 742231 Cortex-A9
1056 (r2p0..r2p2) erratum. Under certain conditions, specific to the
1057 Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1058 accessing some data located in the same cache line, may get corrupted
1059 data due to bad handling of the address hazard when the line gets
1060 replaced from one of the CPUs at the same time as another CPU is
1061 accessing it. This workaround sets specific bits in the diagnostic
1062 register of the Cortex-A9 which reduces the linefill issuing
1063 capabilities of the processor.
1064
Jon Medhurst69155792013-06-07 10:35:35 +01001065config ARM_ERRATA_643719
1066 bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
1067 depends on CPU_V7 && SMP
Russell Kinge5a5de42015-04-02 23:58:55 +01001068 default y
Jon Medhurst69155792013-06-07 10:35:35 +01001069 help
1070 This option enables the workaround for the 643719 Cortex-A9 (prior to
1071 r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
1072 register returns zero when it should return one. The workaround
1073 corrects this value, ensuring cache maintenance operations which use
1074 it behave as intended and avoiding data corruption.
1075
Will Deaconcdf357f2010-08-05 11:20:51 +01001076config ARM_ERRATA_720789
1077 bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
Dave Martine66dc742011-12-08 13:37:46 +01001078 depends on CPU_V7
Will Deaconcdf357f2010-08-05 11:20:51 +01001079 help
1080 This option enables the workaround for the 720789 Cortex-A9 (prior to
1081 r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1082 broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1083 As a consequence of this erratum, some TLB entries which should be
1084 invalidated are not, resulting in an incoherency in the system page
1085 tables. The workaround changes the TLB flushing routines to invalidate
1086 entries regardless of the ASID.
Will Deacon475d92f2010-09-28 14:02:02 +01001087
1088config ARM_ERRATA_743622
1089 bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1090 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001091 depends on !ARCH_MULTIPLATFORM
Will Deacon475d92f2010-09-28 14:02:02 +01001092 help
1093 This option enables the workaround for the 743622 Cortex-A9
Will Deaconefbc74a2012-02-24 12:12:38 +01001094 (r2p*) erratum. Under very rare conditions, a faulty
Will Deacon475d92f2010-09-28 14:02:02 +01001095 optimisation in the Cortex-A9 Store Buffer may lead to data
1096 corruption. This workaround sets a specific bit in the diagnostic
1097 register of the Cortex-A9 which disables the Store Buffer
1098 optimisation, preventing the defect from occurring. This has no
1099 visible impact on the overall performance or power consumption of the
1100 processor.
1101
Will Deacon9a27c272011-02-18 16:36:35 +01001102config ARM_ERRATA_751472
1103 bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
Dave Martinba90c512011-12-08 13:41:06 +01001104 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001105 depends on !ARCH_MULTIPLATFORM
Will Deacon9a27c272011-02-18 16:36:35 +01001106 help
1107 This option enables the workaround for the 751472 Cortex-A9 (prior
1108 to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1109 completion of a following broadcasted operation if the second
1110 operation is received by a CPU before the ICIALLUIS has completed,
1111 potentially leading to corrupted entries in the cache or TLB.
1112
Will Deaconfcbdc5fe2011-02-28 18:15:16 +01001113config ARM_ERRATA_754322
1114 bool "ARM errata: possible faulty MMU translations following an ASID switch"
1115 depends on CPU_V7
1116 help
1117 This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1118 r3p*) erratum. A speculative memory access may cause a page table walk
1119 which starts prior to an ASID switch but completes afterwards. This
1120 can populate the micro-TLB with a stale entry which may be hit with
1121 the new ASID. This workaround places two dsb instructions in the mm
1122 switching code so that no page table walks can cross the ASID switch.
1123
Will Deacon5dab26af2011-03-04 12:38:54 +01001124config ARM_ERRATA_754327
1125 bool "ARM errata: no automatic Store Buffer drain"
1126 depends on CPU_V7 && SMP
1127 help
1128 This option enables the workaround for the 754327 Cortex-A9 (prior to
1129 r2p0) erratum. The Store Buffer does not have any automatic draining
1130 mechanism and therefore a livelock may occur if an external agent
1131 continuously polls a memory location waiting to observe an update.
1132 This workaround defines cpu_relax() as smp_mb(), preventing correctly
1133 written polling loops from denying visibility of updates to memory.
1134
Catalin Marinas145e10e2011-08-15 11:04:41 +01001135config ARM_ERRATA_364296
1136 bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
Fabio Estevamfd832472013-07-09 18:34:01 +01001137 depends on CPU_V6
Catalin Marinas145e10e2011-08-15 11:04:41 +01001138 help
1139 This options enables the workaround for the 364296 ARM1136
1140 r0p2 erratum (possible cache data corruption with
1141 hit-under-miss enabled). It sets the undocumented bit 31 in
1142 the auxiliary control register and the FI bit in the control
1143 register, thus disabling hit-under-miss without putting the
1144 processor into full low interrupt latency mode. ARM11MPCore
1145 is not affected.
1146
Will Deaconf630c1b2011-09-15 11:45:15 +01001147config ARM_ERRATA_764369
1148 bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1149 depends on CPU_V7 && SMP
1150 help
1151 This option enables the workaround for erratum 764369
1152 affecting Cortex-A9 MPCore with two or more processors (all
1153 current revisions). Under certain timing circumstances, a data
1154 cache line maintenance operation by MVA targeting an Inner
1155 Shareable memory region may fail to proceed up to either the
1156 Point of Coherency or to the Point of Unification of the
1157 system. This workaround adds a DSB instruction before the
1158 relevant cache maintenance functions and sets a specific bit
1159 in the diagnostic control register of the SCU.
1160
Simon Horman7253b852012-09-28 02:12:45 +01001161config ARM_ERRATA_775420
1162 bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
1163 depends on CPU_V7
1164 help
1165 This option enables the workaround for the 775420 Cortex-A9 (r2p2,
1166 r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
1167 operation aborts with MMU exception, it might cause the processor
1168 to deadlock. This workaround puts DSB before executing ISB if
1169 an abort may occur on cache maintenance.
1170
Catalin Marinas93dc6882013-03-26 23:35:04 +01001171config ARM_ERRATA_798181
1172 bool "ARM errata: TLBI/DSB failure on Cortex-A15"
1173 depends on CPU_V7 && SMP
1174 help
1175 On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
1176 adequately shooting down all use of the old entries. This
1177 option enables the Linux kernel workaround for this erratum
1178 which sends an IPI to the CPUs that are running the same ASID
1179 as the one being invalidated.
1180
Will Deacon84b65042013-08-20 17:29:55 +01001181config ARM_ERRATA_773022
1182 bool "ARM errata: incorrect instructions may be executed from loop buffer"
1183 depends on CPU_V7
1184 help
1185 This option enables the workaround for the 773022 Cortex-A15
1186 (up to r0p4) erratum. In certain rare sequences of code, the
1187 loop buffer may deliver incorrect instructions. This
1188 workaround disables the loop buffer to avoid the erratum.
1189
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190endmenu
1191
1192source "arch/arm/common/Kconfig"
1193
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194menu "Bus support"
1195
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196config ISA
1197 bool
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 help
1199 Find out whether you have ISA slots on your motherboard. ISA is the
1200 name of a bus system, i.e. the way the CPU talks to the other stuff
1201 inside your box. Other bus systems are PCI, EISA, MicroChannel
1202 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1203 newer boards don't support it. If you have ISA, say Y, otherwise N.
1204
Russell King065909b2006-01-04 15:44:16 +00001205# Select ISA DMA controller support
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206config ISA_DMA
1207 bool
Russell King065909b2006-01-04 15:44:16 +00001208 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209
Russell King065909b2006-01-04 15:44:16 +00001210# Select ISA DMA interface
Al Viro5cae8412005-05-04 05:39:22 +01001211config ISA_DMA_API
1212 bool
Al Viro5cae8412005-05-04 05:39:22 +01001213
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214config PCI
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +01001215 bool "PCI support" if MIGHT_HAVE_PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 help
1217 Find out whether you have a PCI motherboard. PCI is the name of a
1218 bus system, i.e. the way the CPU talks to the other stuff inside
1219 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1220 VESA. If you have PCI, say Y, otherwise N.
1221
Anton Vorontsov52882172010-04-19 13:20:49 +01001222config PCI_DOMAINS
1223 bool
1224 depends on PCI
1225
Lorenzo Pieralisi8c7d14742014-11-21 11:29:26 +00001226config PCI_DOMAINS_GENERIC
1227 def_bool PCI_DOMAINS
1228
Marcelo Roberto Jimenezb080ac82010-12-16 21:34:51 +01001229config PCI_NANOENGINE
1230 bool "BSE nanoEngine PCI support"
1231 depends on SA1100_NANOENGINE
1232 help
1233 Enable PCI on the BSE nanoEngine board.
1234
Matthew Wilcox36e23592007-07-10 10:54:40 -06001235config PCI_SYSCALL
1236 def_bool PCI
1237
Mike Rapoporta0113a92007-11-25 08:55:34 +01001238config PCI_HOST_ITE8152
1239 bool
1240 depends on PCI && MACH_ARMCORE
1241 default y
1242 select DMABOUNCE
1243
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244source "drivers/pci/Kconfig"
1245
1246source "drivers/pcmcia/Kconfig"
1247
1248endmenu
1249
1250menu "Kernel Features"
1251
Dave Martin3b556582011-12-07 15:38:04 +00001252config HAVE_SMP
1253 bool
1254 help
1255 This option should be selected by machines which have an SMP-
1256 capable CPU.
1257
1258 The only effect of this option is to make the SMP-related
1259 options available to the user for configuration.
1260
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261config SMP
Russell Kingbb2d8132011-05-12 09:52:02 +01001262 bool "Symmetric Multi-Processing"
Russell Kingfbb4dda2011-01-17 18:01:58 +00001263 depends on CPU_V6K || CPU_V7
Russell Kingbc282482009-05-17 18:58:34 +01001264 depends on GENERIC_CLOCKEVENTS
Dave Martin3b556582011-12-07 15:38:04 +00001265 depends on HAVE_SMP
Jonathan Austin801bb212013-02-22 18:56:04 +00001266 depends on MMU || ARM_MPU
Arnd Bergmann03617482015-05-26 15:36:58 +01001267 select IRQ_WORK
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268 help
1269 This enables support for systems with more than one CPU. If you have
Robert Graffham4a474152014-01-23 15:55:29 -08001270 a system with only one CPU, say N. If you have a system with more
1271 than one CPU, say Y.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272
Robert Graffham4a474152014-01-23 15:55:29 -08001273 If you say N here, the kernel will run on uni- and multiprocessor
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 machines, but will use only one CPU of a multiprocessor machine. If
Robert Graffham4a474152014-01-23 15:55:29 -08001275 you say Y here, the kernel will run on many, but not all,
1276 uniprocessor machines. On a uniprocessor machine, the kernel
1277 will run faster if you say N here.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278
Paul Bolle395cf962011-08-15 02:02:26 +02001279 See also <file:Documentation/x86/i386/IO-APIC.txt>,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
Justin P. Mattock50a23e62010-10-16 10:36:23 -07001281 <http://tldp.org/HOWTO/SMP-HOWTO.html>.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282
1283 If you don't know what to do here, say N.
1284
Russell Kingf00ec482010-09-04 10:47:48 +01001285config SMP_ON_UP
Russell King5744ff42015-02-13 11:04:21 +00001286 bool "Allow booting SMP kernel on uniprocessor systems"
Jonathan Austin801bb212013-02-22 18:56:04 +00001287 depends on SMP && !XIP_KERNEL && MMU
Russell Kingf00ec482010-09-04 10:47:48 +01001288 default y
1289 help
1290 SMP kernels contain instructions which fail on non-SMP processors.
1291 Enabling this option allows the kernel to modify itself to make
1292 these instructions safe. Disabling it allows about 1K of space
1293 savings.
1294
1295 If you don't know what to do here, say Y.
1296
Vincent Guittotc9018aa2011-08-08 13:21:59 +01001297config ARM_CPU_TOPOLOGY
1298 bool "Support cpu topology definition"
1299 depends on SMP && CPU_V7
1300 default y
1301 help
1302 Support ARM cpu topology definition. The MPIDR register defines
1303 affinity between processors which is then used to describe the cpu
1304 topology of an ARM System.
1305
1306config SCHED_MC
1307 bool "Multi-core scheduler support"
1308 depends on ARM_CPU_TOPOLOGY
1309 help
1310 Multi-core scheduler support improves the CPU scheduler's decision
1311 making when dealing with multi-core CPU chips at a cost of slightly
1312 increased overhead in some places. If unsure say N here.
1313
1314config SCHED_SMT
1315 bool "SMT scheduler support"
1316 depends on ARM_CPU_TOPOLOGY
1317 help
1318 Improves the CPU scheduler's decision making when dealing with
1319 MultiThreading at a cost of slightly increased overhead in some
1320 places. If unsure say N here.
1321
Russell Kinga8cbcd92009-05-16 11:51:14 +01001322config HAVE_ARM_SCU
1323 bool
Russell Kinga8cbcd92009-05-16 11:51:14 +01001324 help
1325 This option enables support for the ARM system coherency unit
1326
Mark Rutland8a4da6e2012-11-12 14:33:44 +00001327config HAVE_ARM_ARCH_TIMER
Marc Zyngier022c03a2012-01-11 17:25:17 +00001328 bool "Architected timer support"
1329 depends on CPU_V7
Mark Rutland8a4da6e2012-11-12 14:33:44 +00001330 select ARM_ARCH_TIMER
Will Deacon0c4034622013-11-19 15:46:17 +01001331 select GENERIC_CLOCKEVENTS
Marc Zyngier022c03a2012-01-11 17:25:17 +00001332 help
1333 This option enables support for the ARM architected timer
1334
Russell Kingf32f4ce2009-05-16 12:14:21 +01001335config HAVE_ARM_TWD
1336 bool
Rob Herringda4a6862013-02-06 21:17:47 -06001337 select CLKSRC_OF if OF
Russell Kingf32f4ce2009-05-16 12:14:21 +01001338 help
1339 This options enables support for the ARM timer and watchdog unit
1340
Nicolas Pitree8db2882012-04-12 02:45:22 -04001341config MCPM
1342 bool "Multi-Cluster Power Management"
1343 depends on CPU_V7 && SMP
1344 help
1345 This option provides the common power management infrastructure
1346 for (multi-)cluster based systems, such as big.LITTLE based
1347 systems.
1348
Haojian Zhuangebf4a5c2014-04-15 14:52:00 +08001349config MCPM_QUAD_CLUSTER
1350 bool
1351 depends on MCPM
1352 help
1353 To avoid wasting resources unnecessarily, MCPM only supports up
1354 to 2 clusters by default.
1355 Platforms with 3 or 4 clusters that use MCPM must select this
1356 option to allow the additional clusters to be managed.
1357
Nicolas Pitre1c33be52012-04-12 02:56:10 -04001358config BIG_LITTLE
1359 bool "big.LITTLE support (Experimental)"
1360 depends on CPU_V7 && SMP
1361 select MCPM
1362 help
1363 This option enables support selections for the big.LITTLE
1364 system architecture.
1365
1366config BL_SWITCHER
1367 bool "big.LITTLE switcher support"
Arnd Bergmann6c044fe2015-11-19 15:49:23 +01001368 depends on BIG_LITTLE && MCPM && HOTPLUG_CPU && ARM_GIC
Russell King51aaf812014-04-22 22:26:27 +01001369 select CPU_PM
Nicolas Pitre1c33be52012-04-12 02:56:10 -04001370 help
1371 The big.LITTLE "switcher" provides the core functionality to
1372 transparently handle transition between a cluster of A15's
1373 and a cluster of A7's in a big.LITTLE system.
1374
Nicolas Pitreb22537c2012-04-12 03:04:28 -04001375config BL_SWITCHER_DUMMY_IF
1376 tristate "Simple big.LITTLE switcher user interface"
1377 depends on BL_SWITCHER && DEBUG_KERNEL
1378 help
1379 This is a simple and dummy char dev interface to control
1380 the big.LITTLE switcher core code. It is meant for
1381 debugging purposes only.
1382
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001383choice
1384 prompt "Memory split"
Russell King006fa252014-02-26 19:40:46 +00001385 depends on MMU
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001386 default VMSPLIT_3G
1387 help
1388 Select the desired split between kernel and user memory.
1389
1390 If you are not absolutely sure what you are doing, leave this
1391 option alone!
1392
1393 config VMSPLIT_3G
1394 bool "3G/1G user/kernel split"
Nicolas Pitre63ce4462015-09-13 03:30:11 +01001395 config VMSPLIT_3G_OPT
1396 bool "3G/1G user/kernel split (for full 1G low memory)"
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001397 config VMSPLIT_2G
1398 bool "2G/2G user/kernel split"
1399 config VMSPLIT_1G
1400 bool "1G/3G user/kernel split"
1401endchoice
1402
1403config PAGE_OFFSET
1404 hex
Russell King006fa252014-02-26 19:40:46 +00001405 default PHYS_OFFSET if !MMU
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001406 default 0x40000000 if VMSPLIT_1G
1407 default 0x80000000 if VMSPLIT_2G
Nicolas Pitre63ce4462015-09-13 03:30:11 +01001408 default 0xB0000000 if VMSPLIT_3G_OPT
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001409 default 0xC0000000
1410
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411config NR_CPUS
1412 int "Maximum number of CPUs (2-32)"
1413 range 2 32
1414 depends on SMP
1415 default "4"
1416
Russell Kinga054a812005-11-02 22:24:33 +00001417config HOTPLUG_CPU
Russell King00b7ded2012-10-22 22:54:30 +01001418 bool "Support for hot-pluggable CPUs"
Stephen Rothwell40b31362013-05-21 13:49:35 +10001419 depends on SMP
Russell Kinga054a812005-11-02 22:24:33 +00001420 help
1421 Say Y here to experiment with turning CPUs off and on. CPUs
1422 can be controlled through /sys/devices/system/cpu.
1423
Will Deacon2bdd4242012-12-12 19:20:52 +00001424config ARM_PSCI
1425 bool "Support for the ARM Power State Coordination Interface (PSCI)"
Jens Wiklandere6796602016-01-04 15:46:47 +01001426 depends on HAVE_ARM_SMCCC
Mark Rutlandbe120392015-07-31 15:46:19 +01001427 select ARM_PSCI_FW
Will Deacon2bdd4242012-12-12 19:20:52 +00001428 help
1429 Say Y here if you want Linux to communicate with system firmware
1430 implementing the PSCI specification for CPU-centric power
1431 management operations described in ARM document number ARM DEN
1432 0022A ("Power State Coordination Interface System Software on
1433 ARM processors").
1434
Maxime Ripard2a6ad872013-02-03 12:24:48 +01001435# The GPIO number here must be sorted by descending number. In case of
1436# a multiplatform kernel, we just want the highest value required by the
1437# selected platforms.
Peter De Schrijver (NVIDIA)44986ab2011-12-21 10:48:45 +01001438config ARCH_NR_GPIO
1439 int
Gregory Fongb35d2e52015-05-28 19:14:10 -07001440 default 1024 if ARCH_BRCMSTB || ARCH_SHMOBILE || ARCH_TEGRA || \
1441 ARCH_ZYNQ
Tomasz Figaaa425872014-07-03 13:17:12 +02001442 default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || \
1443 SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210
Boris BREZILLONeb171a92014-04-10 15:52:46 +02001444 default 416 if ARCH_SUNXI
Olof Johansson06b851e2013-04-02 18:33:58 -07001445 default 392 if ARCH_U8500
Tony Prisk01bb9142013-03-09 18:22:30 +13001446 default 352 if ARCH_VT8500
Heiko Stuebner7b5da4c2014-05-26 00:13:51 +02001447 default 288 if ARCH_ROCKCHIP
Maxime Ripard2a6ad872013-02-03 12:24:48 +01001448 default 264 if MACH_H4700
Peter De Schrijver (NVIDIA)44986ab2011-12-21 10:48:45 +01001449 default 0
1450 help
1451 Maximum number of GPIOs in the system.
1452
1453 If unsure, leave the default value.
1454
Uwe Kleine-Königd45a3982009-08-13 20:38:17 +02001455source kernel/Kconfig.preempt
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456
Russell Kingc9218b12013-04-27 23:31:10 +01001457config HZ_FIXED
Russell Kingf8065812006-03-02 22:41:59 +00001458 int
Kukjin Kim070b8b42014-07-02 07:50:15 +09001459 default 200 if ARCH_EBSA110 || ARCH_S3C24XX || \
Kukjin Kima73ddc62011-05-11 16:27:51 +09001460 ARCH_S5PV210 || ARCH_EXYNOS4
Alexandre Belloni1164f672015-03-13 22:57:24 +01001461 default 128 if SOC_AT91RM9200
Russell King47d84682013-09-10 23:47:55 +01001462 default 0
Russell Kingc9218b12013-04-27 23:31:10 +01001463
1464choice
Russell King47d84682013-09-10 23:47:55 +01001465 depends on HZ_FIXED = 0
Russell Kingc9218b12013-04-27 23:31:10 +01001466 prompt "Timer frequency"
1467
1468config HZ_100
1469 bool "100 Hz"
1470
1471config HZ_200
1472 bool "200 Hz"
1473
1474config HZ_250
1475 bool "250 Hz"
1476
1477config HZ_300
1478 bool "300 Hz"
1479
1480config HZ_500
1481 bool "500 Hz"
1482
1483config HZ_1000
1484 bool "1000 Hz"
1485
1486endchoice
1487
1488config HZ
1489 int
Russell King47d84682013-09-10 23:47:55 +01001490 default HZ_FIXED if HZ_FIXED != 0
Russell Kingc9218b12013-04-27 23:31:10 +01001491 default 100 if HZ_100
1492 default 200 if HZ_200
1493 default 250 if HZ_250
1494 default 300 if HZ_300
1495 default 500 if HZ_500
1496 default 1000
1497
1498config SCHED_HRTICK
1499 def_bool HIGH_RES_TIMERS
Russell Kingf8065812006-03-02 22:41:59 +00001500
Catalin Marinas16c79652009-07-24 12:33:02 +01001501config THUMB2_KERNEL
Uwe Kleine-Königbc7dea02011-12-09 20:52:10 +01001502 bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
Uwe Kleine-König4477ca42013-03-21 21:02:37 +01001503 depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
Uwe Kleine-Königbc7dea02011-12-09 20:52:10 +01001504 default y if CPU_THUMBONLY
Catalin Marinas16c79652009-07-24 12:33:02 +01001505 select AEABI
1506 select ARM_ASM_UNIFIED
Arnd Bergmann89bace62011-06-10 14:12:21 +00001507 select ARM_UNWIND
Catalin Marinas16c79652009-07-24 12:33:02 +01001508 help
1509 By enabling this option, the kernel will be compiled in
1510 Thumb-2 mode. A compiler/assembler that understand the unified
1511 ARM-Thumb syntax is needed.
1512
1513 If unsure, say N.
1514
Dave Martin6f685c52011-03-03 11:41:12 +01001515config THUMB2_AVOID_R_ARM_THM_JUMP11
1516 bool "Work around buggy Thumb-2 short branch relocations in gas"
1517 depends on THUMB2_KERNEL && MODULES
1518 default y
1519 help
1520 Various binutils versions can resolve Thumb-2 branches to
1521 locally-defined, preemptible global symbols as short-range "b.n"
1522 branch instructions.
1523
1524 This is a problem, because there's no guarantee the final
1525 destination of the symbol, or any candidate locations for a
1526 trampoline, are within range of the branch. For this reason, the
1527 kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1528 relocation in modules at all, and it makes little sense to add
1529 support.
1530
1531 The symptom is that the kernel fails with an "unsupported
1532 relocation" error when loading some modules.
1533
1534 Until fixed tools are available, passing
1535 -fno-optimize-sibling-calls to gcc should prevent gcc generating
1536 code which hits this problem, at the cost of a bit of extra runtime
1537 stack usage in some cases.
1538
1539 The problem is described in more detail at:
1540 https://bugs.launchpad.net/binutils-linaro/+bug/725126
1541
1542 Only Thumb-2 kernels are affected.
1543
1544 Unless you are sure your tools don't have this problem, say Y.
1545
Catalin Marinas0becb082009-07-24 12:32:53 +01001546config ARM_ASM_UNIFIED
1547 bool
1548
Nicolas Pitre42f25bd2015-12-12 02:49:21 +01001549config ARM_PATCH_IDIV
1550 bool "Runtime patch udiv/sdiv instructions into __aeabi_{u}idiv()"
1551 depends on CPU_32v7 && !XIP_KERNEL
1552 default y
1553 help
1554 The ARM compiler inserts calls to __aeabi_idiv() and
1555 __aeabi_uidiv() when it needs to perform division on signed
1556 and unsigned integers. Some v7 CPUs have support for the sdiv
1557 and udiv instructions that can be used to implement those
1558 functions.
1559
1560 Enabling this option allows the kernel to modify itself to
1561 replace the first two instructions of these library functions
1562 with the sdiv or udiv plus "bx lr" instructions when the CPU
1563 it is running on supports them. Typically this will be faster
1564 and less power intensive than running the original library
1565 code to do integer division.
1566
Nicolas Pitre704bdda02006-01-14 16:33:50 +00001567config AEABI
1568 bool "Use the ARM EABI to compile the kernel"
1569 help
1570 This option allows for the kernel to be compiled using the latest
1571 ARM ABI (aka EABI). This is only useful if you are using a user
1572 space environment that is also compiled with EABI.
1573
1574 Since there are major incompatibilities between the legacy ABI and
1575 EABI, especially with regard to structure member alignment, this
1576 option also changes the kernel syscall calling convention to
1577 disambiguate both ABIs and allow for backward compatibility support
1578 (selected with CONFIG_OABI_COMPAT).
1579
1580 To use this you need GCC version 4.0.0 or later.
1581
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001582config OABI_COMPAT
Russell Kinga73a3ff2006-02-08 21:09:55 +00001583 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
Kees Cookd6f94fa2013-01-16 18:53:14 -08001584 depends on AEABI && !THUMB2_KERNEL
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001585 help
1586 This option preserves the old syscall interface along with the
1587 new (ARM EABI) one. It also provides a compatibility layer to
1588 intercept syscalls that have structure arguments which layout
1589 in memory differs between the legacy ABI and the new ARM EABI
1590 (only for non "thumb" binaries). This option adds a tiny
1591 overhead to all syscalls and produces a slightly larger kernel.
Kees Cook91702172013-11-09 00:51:56 +01001592
1593 The seccomp filter system will not be available when this is
1594 selected, since there is no way yet to sensibly distinguish
1595 between calling conventions during filtering.
1596
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001597 If you know you'll be using only pure EABI user space then you
1598 can say N here. If this option is not selected and you attempt
1599 to execute a legacy ABI binary then the result will be
1600 UNPREDICTABLE (in fact it can be predicted that it won't work
Kees Cookb02f8462013-11-09 00:31:11 +01001601 at all). If in doubt say N.
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001602
Mel Gormaneb335752009-05-13 17:34:48 +01001603config ARCH_HAS_HOLES_MEMORYMODEL
Mel Gormane80d6a22008-08-14 11:10:14 +01001604 bool
Mel Gormane80d6a22008-08-14 11:10:14 +01001605
Russell King05944d72006-11-30 20:43:51 +00001606config ARCH_SPARSEMEM_ENABLE
1607 bool
1608
Russell King07a2f732008-10-01 21:39:58 +01001609config ARCH_SPARSEMEM_DEFAULT
1610 def_bool ARCH_SPARSEMEM_ENABLE
1611
Russell King05944d72006-11-30 20:43:51 +00001612config ARCH_SELECT_MEMORY_MODEL
Russell Kingbe370302010-05-07 17:40:33 +01001613 def_bool ARCH_SPARSEMEM_ENABLE
Yasunori Gotoc80d79d2006-04-10 22:53:53 -07001614
Will Deacon7b7bf492011-05-19 13:21:14 +01001615config HAVE_ARCH_PFN_VALID
1616 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1617
Steve Capperb8cd51a2014-10-09 15:29:20 -07001618config HAVE_GENERIC_RCU_GUP
1619 def_bool y
1620 depends on ARM_LPAE
1621
Nicolas Pitre053a96c2008-09-19 00:36:12 -04001622config HIGHMEM
Russell Kinge8db89a2011-05-12 09:53:05 +01001623 bool "High Memory Support"
1624 depends on MMU
Nicolas Pitre053a96c2008-09-19 00:36:12 -04001625 help
1626 The address space of ARM processors is only 4 Gigabytes large
1627 and it has to accommodate user address space, kernel address
1628 space as well as some memory mapped IO. That means that, if you
1629 have a large amount of physical memory and/or IO, not all of the
1630 memory can be "permanently mapped" by the kernel. The physical
1631 memory that is not permanently mapped is called "high memory".
1632
1633 Depending on the selected kernel/user memory split, minimum
1634 vmalloc space and actual amount of RAM, you may not need this
1635 option which should result in a slightly faster kernel.
1636
1637 If unsure, say n.
1638
Russell King65cec8e2009-08-17 20:02:06 +01001639config HIGHPTE
Russell King9a431bd2015-06-25 10:44:08 +01001640 bool "Allocate 2nd-level pagetables from highmem" if EXPERT
Russell King65cec8e2009-08-17 20:02:06 +01001641 depends on HIGHMEM
Russell King9a431bd2015-06-25 10:44:08 +01001642 default y
Russell Kingb4d103d2015-06-25 10:49:45 +01001643 help
1644 The VM uses one page of physical memory for each page table.
1645 For systems with a lot of processes, this can use a lot of
1646 precious low memory, eventually leading to low memory being
1647 consumed by page tables. Setting this option will allow
1648 user-space 2nd level page tables to reside in high memory.
Russell King65cec8e2009-08-17 20:02:06 +01001649
Russell Kinga5e090a2015-08-19 20:40:41 +01001650config CPU_SW_DOMAIN_PAN
1651 bool "Enable use of CPU domains to implement privileged no-access"
1652 depends on MMU && !ARM_LPAE
Jamie Iles1b8873a2010-02-02 20:25:44 +01001653 default y
1654 help
Russell Kinga5e090a2015-08-19 20:40:41 +01001655 Increase kernel security by ensuring that normal kernel accesses
1656 are unable to access userspace addresses. This can help prevent
1657 use-after-free bugs becoming an exploitable privilege escalation
1658 by ensuring that magic values (such as LIST_POISON) will always
1659 fault when dereferenced.
1660
1661 CPUs with low-vector mappings use a best-efforts implementation.
1662 Their lower 1MB needs to remain accessible for the vectors, but
1663 the remainder of userspace will become appropriately inaccessible.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001664
1665config HW_PERF_EVENTS
Mark Rutlandfa8ad782015-07-06 12:23:53 +01001666 def_bool y
1667 depends on ARM_PMU
Jamie Iles1b8873a2010-02-02 20:25:44 +01001668
Catalin Marinas1355e2a2012-07-25 14:32:38 +01001669config SYS_SUPPORTS_HUGETLBFS
1670 def_bool y
1671 depends on ARM_LPAE
1672
Catalin Marinas8d962502012-07-25 14:39:26 +01001673config HAVE_ARCH_TRANSPARENT_HUGEPAGE
1674 def_bool y
1675 depends on ARM_LPAE
1676
Steven Capper4bfab202013-07-26 14:58:22 +01001677config ARCH_WANT_GENERAL_HUGETLB
1678 def_bool y
1679
Ard Biesheuvel7d485f62014-11-24 16:54:35 +01001680config ARM_MODULE_PLTS
1681 bool "Use PLTs to allow module memory to spill over into vmalloc area"
1682 depends on MODULES
1683 help
1684 Allocate PLTs when loading modules so that jumps and calls whose
1685 targets are too far away for their relative offsets to be encoded
1686 in the instructions themselves can be bounced via veneers in the
1687 module's PLT. This allows modules to be allocated in the generic
1688 vmalloc area after the dedicated module memory area has been
1689 exhausted. The modules will use slightly more memory, but after
1690 rounding up to page size, the actual memory footprint is usually
1691 the same.
1692
1693 Say y if you are getting out of memory errors while loading modules
1694
Linus Torvalds1da177e2005-04-16 15:20:36 -07001695source "mm/Kconfig"
1696
Magnus Dammc1b2d972010-07-05 10:00:11 +01001697config FORCE_MAX_ZONEORDER
Ulrich Hecht36d6c922015-08-14 15:51:06 +02001698 int "Maximum zone order"
Yegor Yefremov898f08e2012-10-08 14:37:53 -07001699 default "12" if SOC_AM33XX
Uwe Kleine-König6d85e2b2011-11-17 14:36:23 +01001700 default "9" if SA1111 || ARCH_EFM32
Magnus Dammc1b2d972010-07-05 10:00:11 +01001701 default "11"
1702 help
1703 The kernel memory allocator divides physically contiguous memory
1704 blocks into "zones", where each zone is a power of two number of
1705 pages. This option selects the largest power of two that the kernel
1706 keeps in the memory allocator. If you need to allocate very large
1707 blocks of physically contiguous memory, then you may need to
1708 increase this value.
1709
1710 This config option is actually maximum order plus one. For example,
1711 a value of 11 means that the largest free memory block is 2^10 pages.
1712
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713config ALIGNMENT_TRAP
1714 bool
Hyok S. Choif12d0d72006-09-26 17:36:37 +09001715 depends on CPU_CP15_MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -07001716 default y if !ARCH_EBSA110
Russell Kinge119bff2010-01-10 17:23:29 +00001717 select HAVE_PROC_CPU if PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718 help
Matt LaPlante84eb8d02006-10-03 22:53:09 +02001719 ARM processors cannot fetch/store information which is not
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1721 address divisible by 4. On 32-bit ARM processors, these non-aligned
1722 fetch/store instructions will be emulated in software if you say
1723 here, which has a severe performance impact. This is necessary for
1724 correct operation of some network protocols. With an IP-only
1725 configuration it is safe to say N, otherwise say Y.
1726
Lennert Buytenhek39ec58f2009-03-09 14:30:09 -04001727config UACCESS_WITH_MEMCPY
Linus Walleij38ef2ad2012-09-10 16:36:37 +01001728 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
1729 depends on MMU
Lennert Buytenhek39ec58f2009-03-09 14:30:09 -04001730 default y if CPU_FEROCEON
1731 help
1732 Implement faster copy_to_user and clear_user methods for CPU
1733 cores where a 8-word STM instruction give significantly higher
1734 memory write throughput than a sequence of individual 32bit stores.
1735
1736 A possible side effect is a slight increase in scheduling latency
1737 between threads sharing the same address space if they invoke
1738 such copy operations with large buffers.
1739
1740 However, if the CPU data cache is using a write-allocate mode,
1741 this option is unlikely to provide any performance gain.
1742
Nicolas Pitre70c70d92010-08-26 15:08:35 -07001743config SECCOMP
1744 bool
1745 prompt "Enable seccomp to safely compute untrusted bytecode"
1746 ---help---
1747 This kernel feature is useful for number crunching applications
1748 that may need to compute untrusted bytecode during their
1749 execution. By using pipes or other transports made available to
1750 the process as file descriptors supporting the read/write
1751 syscalls, it's possible to isolate those applications in
1752 their own address space using seccomp. Once seccomp is
1753 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1754 and the task is only allowed to execute a few safe syscalls
1755 defined by each seccomp mode.
1756
Stefano Stabellini06e62952013-10-15 15:47:14 +00001757config SWIOTLB
1758 def_bool y
1759
1760config IOMMU_HELPER
1761 def_bool SWIOTLB
1762
Stefano Stabellini02c24332015-11-23 10:32:57 +00001763config PARAVIRT
1764 bool "Enable paravirtualization code"
1765 help
1766 This changes the kernel so it can modify itself when it is run
1767 under a hypervisor, potentially improving performance significantly
1768 over full virtualization.
1769
1770config PARAVIRT_TIME_ACCOUNTING
1771 bool "Paravirtual steal time accounting"
1772 select PARAVIRT
1773 default n
1774 help
1775 Select this option to enable fine granularity task steal time
1776 accounting. Time spent executing other tasks in parallel with
1777 the current vCPU is discounted from the vCPU power. To account for
1778 that, there can be a small performance impact.
1779
1780 If in doubt, say N here.
1781
Stefano Stabellinieff8d642012-09-17 14:58:17 +00001782config XEN_DOM0
1783 def_bool y
1784 depends on XEN
1785
1786config XEN
Julien Grallc2ba1f72014-09-17 14:07:06 -07001787 bool "Xen guest support on ARM"
Ian Campbell85323a92013-03-07 07:17:25 +00001788 depends on ARM && AEABI && OF
Arnd Bergmannf880b672012-10-09 10:33:52 +00001789 depends on CPU_V7 && !CPU_V6
Ian Campbell85323a92013-03-07 07:17:25 +00001790 depends on !GENERIC_ATOMIC64
Uwe Kleine-König7693dec2014-03-03 09:25:52 -05001791 depends on MMU
Russell King51aaf812014-04-22 22:26:27 +01001792 select ARCH_DMA_ADDR_T_64BIT
Stefano Stabellini17b7ab82013-04-24 18:47:18 +00001793 select ARM_PSCI
Stefano Stabellini83862cc2013-10-10 13:40:44 +00001794 select SWIOTLB_XEN
Stefano Stabellini02c24332015-11-23 10:32:57 +00001795 select PARAVIRT
Stefano Stabellinieff8d642012-09-17 14:58:17 +00001796 help
1797 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
1798
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799endmenu
1800
1801menu "Boot options"
1802
Grant Likely9eb8f672011-04-28 14:27:20 -06001803config USE_OF
1804 bool "Flattened Device Tree support"
Russell Kingb1b3f492012-10-06 17:12:25 +01001805 select IRQ_DOMAIN
Grant Likely9eb8f672011-04-28 14:27:20 -06001806 select OF
Grant Likely9eb8f672011-04-28 14:27:20 -06001807 help
1808 Include support for flattened device tree machine descriptions.
1809
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01001810config ATAGS
1811 bool "Support for the traditional ATAGS boot data passing" if USE_OF
1812 default y
1813 help
1814 This is the traditional way of passing data to the kernel at boot
1815 time. If you are solely relying on the flattened device tree (or
1816 the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
1817 to remove ATAGS support from your kernel binary. If unsure,
1818 leave this to y.
1819
1820config DEPRECATED_PARAM_STRUCT
1821 bool "Provide old way to pass kernel parameters"
1822 depends on ATAGS
1823 help
1824 This was deprecated in 2001 and announced to live on for 5 years.
1825 Some old boot loaders still use this way.
1826
Linus Torvalds1da177e2005-04-16 15:20:36 -07001827# Compressed boot loader in ROM. Yes, we really want to ask about
1828# TEXT and BSS so we preserve their values in the config files.
1829config ZBOOT_ROM_TEXT
1830 hex "Compressed ROM boot loader base address"
1831 default "0"
1832 help
1833 The physical address at which the ROM-able zImage is to be
1834 placed in the target. Platforms which normally make use of
1835 ROM-able zImage formats normally set this to a suitable
1836 value in their defconfig file.
1837
1838 If ZBOOT_ROM is not enabled, this has no effect.
1839
1840config ZBOOT_ROM_BSS
1841 hex "Compressed ROM boot loader BSS address"
1842 default "0"
1843 help
Dan Fandrichf8c440b2006-09-20 23:28:51 +01001844 The base address of an area of read/write memory in the target
1845 for the ROM-able zImage which must be available while the
1846 decompressor is running. It must be large enough to hold the
1847 entire decompressed kernel plus an additional 128 KiB.
1848 Platforms which normally make use of ROM-able zImage formats
1849 normally set this to a suitable value in their defconfig file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850
1851 If ZBOOT_ROM is not enabled, this has no effect.
1852
1853config ZBOOT_ROM
1854 bool "Compressed boot loader in ROM/flash"
1855 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
Russell King10968132014-01-01 11:59:44 +00001856 depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857 help
1858 Say Y here if you intend to execute your compressed kernel image
1859 (zImage) directly from ROM or flash. If unsure, say N.
1860
John Bonesioe2a6a3a2011-05-27 18:45:50 -04001861config ARM_APPENDED_DTB
1862 bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
Russell King10968132014-01-01 11:59:44 +00001863 depends on OF
John Bonesioe2a6a3a2011-05-27 18:45:50 -04001864 help
1865 With this option, the boot code will look for a device tree binary
1866 (DTB) appended to zImage
1867 (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1868
1869 This is meant as a backward compatibility convenience for those
1870 systems with a bootloader that can't be upgraded to accommodate
1871 the documented boot protocol using a device tree.
1872
1873 Beware that there is very little in terms of protection against
1874 this option being confused by leftover garbage in memory that might
1875 look like a DTB header after a reboot if no actual DTB is appended
1876 to zImage. Do not leave this option active in a production kernel
1877 if you don't intend to always append a DTB. Proper passing of the
1878 location into r2 of a bootloader provided DTB is always preferable
1879 to this option.
1880
Nicolas Pitreb90b9a32011-09-13 22:37:07 -04001881config ARM_ATAG_DTB_COMPAT
1882 bool "Supplement the appended DTB with traditional ATAG information"
1883 depends on ARM_APPENDED_DTB
1884 help
1885 Some old bootloaders can't be updated to a DTB capable one, yet
1886 they provide ATAGs with memory configuration, the ramdisk address,
1887 the kernel cmdline string, etc. Such information is dynamically
1888 provided by the bootloader and can't always be stored in a static
1889 DTB. To allow a device tree enabled kernel to be used with such
1890 bootloaders, this option allows zImage to extract the information
1891 from the ATAG list and store it at run time into the appended DTB.
1892
Genoud Richardd0f34a112012-06-26 16:37:59 +01001893choice
1894 prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
1895 default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1896
1897config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1898 bool "Use bootloader kernel arguments if available"
1899 help
1900 Uses the command-line options passed by the boot loader instead of
1901 the device tree bootargs property. If the boot loader doesn't provide
1902 any, the device tree bootargs property will be used.
1903
1904config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
1905 bool "Extend with bootloader kernel arguments"
1906 help
1907 The command-line arguments provided by the boot loader will be
1908 appended to the the device tree bootargs property.
1909
1910endchoice
1911
Linus Torvalds1da177e2005-04-16 15:20:36 -07001912config CMDLINE
1913 string "Default kernel command string"
1914 default ""
1915 help
1916 On some architectures (EBSA110 and CATS), there is currently no way
1917 for the boot loader to pass arguments to the kernel. For these
1918 architectures, you should supply some command-line options at build
1919 time by entering them here. As a minimum, you should specify the
1920 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1921
Victor Boivie4394c122011-05-04 17:07:55 +01001922choice
1923 prompt "Kernel command line type" if CMDLINE != ""
1924 default CMDLINE_FROM_BOOTLOADER
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01001925 depends on ATAGS
Victor Boivie4394c122011-05-04 17:07:55 +01001926
1927config CMDLINE_FROM_BOOTLOADER
1928 bool "Use bootloader kernel arguments if available"
1929 help
1930 Uses the command-line options passed by the boot loader. If
1931 the boot loader doesn't provide any, the default kernel command
1932 string provided in CMDLINE will be used.
1933
1934config CMDLINE_EXTEND
1935 bool "Extend bootloader kernel arguments"
1936 help
1937 The command-line arguments provided by the boot loader will be
1938 appended to the default kernel command string.
1939
Alexander Holler92d20402010-02-16 19:04:53 +01001940config CMDLINE_FORCE
1941 bool "Always use the default kernel command string"
Alexander Holler92d20402010-02-16 19:04:53 +01001942 help
1943 Always use the default kernel command string, even if the boot
1944 loader passes other arguments to the kernel.
1945 This is useful if you cannot or don't want to change the
1946 command-line options your boot loader passes to the kernel.
Victor Boivie4394c122011-05-04 17:07:55 +01001947endchoice
Alexander Holler92d20402010-02-16 19:04:53 +01001948
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949config XIP_KERNEL
1950 bool "Kernel Execute-In-Place from ROM"
Russell King10968132014-01-01 11:59:44 +00001951 depends on !ARM_LPAE && !ARCH_MULTIPLATFORM
Linus Torvalds1da177e2005-04-16 15:20:36 -07001952 help
1953 Execute-In-Place allows the kernel to run from non-volatile storage
1954 directly addressable by the CPU, such as NOR flash. This saves RAM
1955 space since the text section of the kernel is not loaded from flash
1956 to RAM. Read-write sections, such as the data section and stack,
1957 are still copied to RAM. The XIP kernel is not compressed since
1958 it has to run directly from flash, so it will take more space to
1959 store it. The flash address used to link the kernel object files,
1960 and for storing it, is configuration dependent. Therefore, if you
1961 say Y here, you must know the proper physical address where to
1962 store the kernel image depending on your own flash memory usage.
1963
1964 Also note that the make target becomes "make xipImage" rather than
1965 "make zImage" or "make Image". The final kernel binary to put in
1966 ROM memory will be arch/arm/boot/xipImage.
1967
1968 If unsure, say N.
1969
1970config XIP_PHYS_ADDR
1971 hex "XIP Kernel Physical Location"
1972 depends on XIP_KERNEL
1973 default "0x00080000"
1974 help
1975 This is the physical address in your flash memory the kernel will
1976 be linked for and stored to. This address is dependent on your
1977 own flash usage.
1978
Richard Purdiec587e4a2007-02-06 21:29:00 +01001979config KEXEC
1980 bool "Kexec system call (EXPERIMENTAL)"
Stephen Warren19ab4282013-06-14 16:14:14 +01001981 depends on (!SMP || PM_SLEEP_SMP)
Arnd Bergmanncb1293e2015-05-26 15:40:44 +01001982 depends on !CPU_V7M
Dave Young2965faa2015-09-09 15:38:55 -07001983 select KEXEC_CORE
Richard Purdiec587e4a2007-02-06 21:29:00 +01001984 help
1985 kexec is a system call that implements the ability to shutdown your
1986 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante01dd2fb2007-10-20 01:34:40 +02001987 but it is independent of the system firmware. And like a reboot
Richard Purdiec587e4a2007-02-06 21:29:00 +01001988 you can start any kernel with it, not just Linux.
1989
1990 It is an ongoing process to be certain the hardware in a machine
1991 is properly shutdown, so do not be surprised if this code does not
Geert Uytterhoevenbf220692013-08-20 21:38:03 +02001992 initially work for you.
Richard Purdiec587e4a2007-02-06 21:29:00 +01001993
Richard Purdie4cd9d6f2008-01-02 00:56:46 +01001994config ATAGS_PROC
1995 bool "Export atags in procfs"
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01001996 depends on ATAGS && KEXEC
Uli Luckasb98d7292008-02-22 16:45:18 +01001997 default y
Richard Purdie4cd9d6f2008-01-02 00:56:46 +01001998 help
1999 Should the atags used to boot the kernel be exported in an "atags"
2000 file in procfs. Useful with kexec.
2001
Mika Westerbergcb5d39b2010-11-18 19:14:52 +01002002config CRASH_DUMP
2003 bool "Build kdump crash kernel (EXPERIMENTAL)"
Mika Westerbergcb5d39b2010-11-18 19:14:52 +01002004 help
2005 Generate crash dump after being started by kexec. This should
2006 be normally only set in special crash dump kernels which are
2007 loaded in the main kernel with kexec-tools into a specially
2008 reserved region and then later executed after a crash by
2009 kdump/kexec. The crash dump kernel must be compiled to a
2010 memory address not used by the main kernel
2011
2012 For more details see Documentation/kdump/kdump.txt
2013
Eric Miaoe69edc792010-07-05 15:56:50 +02002014config AUTO_ZRELADDR
2015 bool "Auto calculation of the decompressed kernel image address"
Eric Miaoe69edc792010-07-05 15:56:50 +02002016 help
2017 ZRELADDR is the physical address where the decompressed kernel
2018 image will be placed. If AUTO_ZRELADDR is selected, the address
2019 will be determined at run-time by masking the current IP with
2020 0xf8000000. This assumes the zImage being placed in the first 128MB
2021 from start of memory.
2022
Roy Franz81a0bc32015-09-23 20:17:54 -07002023config EFI_STUB
2024 bool
2025
2026config EFI
2027 bool "UEFI runtime support"
2028 depends on OF && !CPU_BIG_ENDIAN && MMU && AUTO_ZRELADDR && !XIP_KERNEL
2029 select UCS2_STRING
2030 select EFI_PARAMS_FROM_FDT
2031 select EFI_STUB
2032 select EFI_ARMSTUB
2033 select EFI_RUNTIME_WRAPPERS
2034 ---help---
2035 This option provides support for runtime services provided
2036 by UEFI firmware (such as non-volatile variables, realtime
2037 clock, and platform reset). A UEFI stub is also provided to
2038 allow the kernel to be booted as an EFI application. This
2039 is only useful for kernels that may run on systems that have
2040 UEFI firmware.
2041
Linus Torvalds1da177e2005-04-16 15:20:36 -07002042endmenu
2043
Russell Kingac9d7ef2008-08-18 17:26:00 +01002044menu "CPU Power Management"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045
Linus Torvalds1da177e2005-04-16 15:20:36 -07002046source "drivers/cpufreq/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047
Russell Kingac9d7ef2008-08-18 17:26:00 +01002048source "drivers/cpuidle/Kconfig"
2049
2050endmenu
2051
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052menu "Floating point emulation"
2053
2054comment "At least one emulation must be selected"
2055
2056config FPE_NWFPE
2057 bool "NWFPE math emulation"
Dave Martin593c2522010-12-13 21:56:03 +01002058 depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
Linus Torvalds1da177e2005-04-16 15:20:36 -07002059 ---help---
2060 Say Y to include the NWFPE floating point emulator in the kernel.
2061 This is necessary to run most binaries. Linux does not currently
2062 support floating point hardware so you need to say Y here even if
2063 your machine has an FPA or floating point co-processor podule.
2064
2065 You may say N here if you are going to load the Acorn FPEmulator
2066 early in the bootup.
2067
2068config FPE_NWFPE_XP
2069 bool "Support extended precision"
Lennert Buytenhekbedf1422005-11-07 21:12:08 +00002070 depends on FPE_NWFPE
Linus Torvalds1da177e2005-04-16 15:20:36 -07002071 help
2072 Say Y to include 80-bit support in the kernel floating-point
2073 emulator. Otherwise, only 32 and 64-bit support is compiled in.
2074 Note that gcc does not generate 80-bit operations by default,
2075 so in most cases this option only enlarges the size of the
2076 floating point emulator without any good reason.
2077
2078 You almost surely want to say N here.
2079
2080config FPE_FASTFPE
2081 bool "FastFPE math emulation (EXPERIMENTAL)"
Kees Cookd6f94fa2013-01-16 18:53:14 -08002082 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
Linus Torvalds1da177e2005-04-16 15:20:36 -07002083 ---help---
2084 Say Y here to include the FAST floating point emulator in the kernel.
2085 This is an experimental much faster emulator which now also has full
2086 precision for the mantissa. It does not support any exceptions.
2087 It is very simple, and approximately 3-6 times faster than NWFPE.
2088
2089 It should be sufficient for most programs. It may be not suitable
2090 for scientific calculations, but you have to check this for yourself.
2091 If you do not feel you need a faster FP emulation you should better
2092 choose NWFPE.
2093
2094config VFP
2095 bool "VFP-format floating point maths"
Russell Kinge399b1a2011-01-17 15:08:32 +00002096 depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
Linus Torvalds1da177e2005-04-16 15:20:36 -07002097 help
2098 Say Y to include VFP support code in the kernel. This is needed
2099 if your hardware includes a VFP unit.
2100
2101 Please see <file:Documentation/arm/VFP/release-notes.txt> for
2102 release notes and additional status information.
2103
2104 Say N if your target does not have VFP hardware.
2105
Catalin Marinas25ebee02007-09-25 15:22:24 +01002106config VFPv3
2107 bool
2108 depends on VFP
2109 default y if CPU_V7
2110
Catalin Marinasb5872db2008-01-10 19:16:17 +01002111config NEON
2112 bool "Advanced SIMD (NEON) Extension support"
2113 depends on VFPv3 && CPU_V7
2114 help
2115 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2116 Extension.
2117
Ard Biesheuvel73c132c2013-05-16 11:41:48 +02002118config KERNEL_MODE_NEON
2119 bool "Support for NEON in kernel mode"
Russell Kingc4a30c32013-09-22 11:08:50 +01002120 depends on NEON && AEABI
Ard Biesheuvel73c132c2013-05-16 11:41:48 +02002121 help
2122 Say Y to include support for NEON in kernel mode.
2123
Linus Torvalds1da177e2005-04-16 15:20:36 -07002124endmenu
2125
2126menu "Userspace binary formats"
2127
2128source "fs/Kconfig.binfmt"
2129
Linus Torvalds1da177e2005-04-16 15:20:36 -07002130endmenu
2131
2132menu "Power management options"
2133
Russell Kingeceab4a2005-11-15 11:31:41 +00002134source "kernel/power/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135
Johannes Bergf4cb5702007-12-08 02:14:00 +01002136config ARCH_SUSPEND_POSSIBLE
Ezequiel Garcia19a05192013-08-16 10:28:24 +01002137 depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
Uwe Kleine-Königf0d75152012-02-01 10:00:00 +01002138 CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
Johannes Bergf4cb5702007-12-08 02:14:00 +01002139 def_bool y
2140
Arnd Bergmann15e0d9e2011-10-01 21:09:39 +02002141config ARM_CPU_SUSPEND
Lorenzo Pieralisi8b6f2492016-02-01 18:01:30 +01002142 def_bool PM_SLEEP || BL_SWITCHER || ARM_PSCI_FW
Lorenzo Pieralisi1b9bdf52016-02-01 18:01:29 +01002143 depends on ARCH_SUSPEND_POSSIBLE
Arnd Bergmann15e0d9e2011-10-01 21:09:39 +02002144
Sebastian Capella603fb422014-03-25 01:20:29 +01002145config ARCH_HIBERNATION_POSSIBLE
2146 bool
2147 depends on MMU
2148 default y if ARCH_SUSPEND_POSSIBLE
2149
Linus Torvalds1da177e2005-04-16 15:20:36 -07002150endmenu
2151
Sam Ravnborgd5950b42005-07-11 21:03:49 -07002152source "net/Kconfig"
2153
Uwe Kleine-Königac251502009-08-13 21:09:21 +02002154source "drivers/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002155
Kumar Gala916f7432015-02-26 15:49:09 -06002156source "drivers/firmware/Kconfig"
2157
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158source "fs/Kconfig"
2159
Linus Torvalds1da177e2005-04-16 15:20:36 -07002160source "arch/arm/Kconfig.debug"
2161
2162source "security/Kconfig"
2163
2164source "crypto/Kconfig"
Ard Biesheuvel652ccae2015-03-10 09:47:44 +01002165if CRYPTO
2166source "arch/arm/crypto/Kconfig"
2167endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002168
2169source "lib/Kconfig"
Christoffer Dall749cf76c2013-01-20 18:28:06 -05002170
2171source "arch/arm/kvm/Kconfig"