blob: 97adb5eda7bb378ab053ee4504e83b83c4fd152f [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
Kees Cook2b68f6c2015-04-14 15:48:00 -07005 select ARCH_HAS_ELF_RANDOMIZE
Mark Rutland3d067702012-10-30 12:13:42 +00006 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
Russell King171b3f02013-09-12 21:24:42 +01007 select ARCH_HAVE_CUSTOM_GPIO_H
Riku Voipio957e3fa2014-12-12 16:57:44 -08008 select ARCH_HAS_GCOV_PROFILE_ALL
Mark Salterd7018842013-10-07 22:07:58 -04009 select ARCH_MIGHT_HAVE_PC_PARPORT
Peter Zijlstra4badad32014-06-06 19:53:16 +020010 select ARCH_SUPPORTS_ATOMIC_RMW
Kim Phillips017f1612013-11-06 05:15:24 +010011 select ARCH_USE_BUILTIN_BSWAP
Will Deacon0cbad9c2013-10-09 17:19:22 +010012 select ARCH_USE_CMPXCHG_LOCKREF
Russell Kingb1b3f492012-10-06 17:12:25 +010013 select ARCH_WANT_IPC_PARSE_VERSION
Stephen Boydee951c62012-10-29 19:19:34 +010014 select BUILDTIME_EXTABLE_SORT if MMU
Russell King171b3f02013-09-12 21:24:42 +010015 select CLONE_BACKWARDS
Russell Kingb1b3f492012-10-06 17:12:25 +010016 select CPU_PM if (SUSPEND || CPU_IDLE)
Will Deacondce5c9e2013-12-17 19:50:16 +010017 select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS
Borislav Petkovb01aec92015-05-21 19:59:31 +020018 select EDAC_SUPPORT
19 select EDAC_ATOMIC_SCRUB
Laura Abbott36d0fd22014-10-09 15:26:42 -070020 select GENERIC_ALLOCATOR
Uwe Kleine-König4477ca42013-03-21 21:02:37 +010021 select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
Russell Kingb1b3f492012-10-06 17:12:25 +010022 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
Russell King171b3f02013-09-12 21:24:42 +010023 select GENERIC_IDLE_POLL_SETUP
Russell Kingb1b3f492012-10-06 17:12:25 +010024 select GENERIC_IRQ_PROBE
25 select GENERIC_IRQ_SHOW
Geert Uytterhoeven7c070052015-04-01 13:37:11 +010026 select GENERIC_IRQ_SHOW_LEVEL
Russell Kingb1b3f492012-10-06 17:12:25 +010027 select GENERIC_PCI_IOMAP
Stephen Boyd38ff87f2013-06-01 23:39:40 -070028 select GENERIC_SCHED_CLOCK
Russell Kingb1b3f492012-10-06 17:12:25 +010029 select GENERIC_SMP_IDLE_THREAD
30 select GENERIC_STRNCPY_FROM_USER
31 select GENERIC_STRNLEN_USER
Marc Zyngiera71b0922014-08-26 11:03:18 +010032 select HANDLE_DOMAIN_IRQ
Russell Kingb1b3f492012-10-06 17:12:25 +010033 select HARDIRQS_SW_RESEND
AKASHI Takahiro7a017722014-02-25 18:16:24 +090034 select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT)
Yalin Wang0b7857d2015-01-16 02:45:55 +010035 select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6
Arnd Bergmanncfeec792015-05-26 15:38:01 +010036 select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32
37 select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32
Kees Cook91702172013-11-09 00:51:56 +010038 select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
Wade Farnsworth0693bf62012-04-04 16:19:47 +010039 select HAVE_ARCH_TRACEHOOK
Russell Kingb1b3f492012-10-06 17:12:25 +010040 select HAVE_BPF_JIT
Russell King51aaf812014-04-22 22:26:27 +010041 select HAVE_CC_STACKPROTECTOR
Russell King171b3f02013-09-12 21:24:42 +010042 select HAVE_CONTEXT_TRACKING
Russell Kingb1b3f492012-10-06 17:12:25 +010043 select HAVE_C_RECORDMCOUNT
44 select HAVE_DEBUG_KMEMLEAK
45 select HAVE_DMA_API_DEBUG
46 select HAVE_DMA_ATTRS
47 select HAVE_DMA_CONTIGUOUS if MMU
Arnd Bergmanncfeec792015-05-26 15:38:01 +010048 select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) && !CPU_ENDIAN_BE32
Will Deacondce5c9e2013-12-17 19:50:16 +010049 select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU
Russell Kingb1b3f492012-10-06 17:12:25 +010050 select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
51 select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
52 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
53 select HAVE_GENERIC_DMA_COHERENT
Russell Kingb1b3f492012-10-06 17:12:25 +010054 select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
55 select HAVE_IDE if PCI || ISA || PCMCIA
Russell King87c46b62013-05-04 14:38:59 +010056 select HAVE_IRQ_TIME_ACCOUNTING
Russell Kingb1b3f492012-10-06 17:12:25 +010057 select HAVE_KERNEL_GZIP
Kyungsik Leef9b493a2013-07-08 16:01:48 -070058 select HAVE_KERNEL_LZ4
Russell Kingb1b3f492012-10-06 17:12:25 +010059 select HAVE_KERNEL_LZMA
60 select HAVE_KERNEL_LZO
61 select HAVE_KERNEL_XZ
Arnd Bergmanncb1293e2015-05-26 15:40:44 +010062 select HAVE_KPROBES if !XIP_KERNEL && !CPU_ENDIAN_BE32 && !CPU_V7M
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -080063 select HAVE_KRETPROBES if (HAVE_KPROBES)
Russell Kingb1b3f492012-10-06 17:12:25 +010064 select HAVE_MEMBLOCK
Ard Biesheuvel7d485f62014-11-24 16:54:35 +010065 select HAVE_MOD_ARCH_SPECIFIC
Russell Kingb1b3f492012-10-06 17:12:25 +010066 select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
Wang Nan0dc016d2015-01-09 14:37:36 +080067 select HAVE_OPTPROBES if !THUMB2_KERNEL
Jamie Iles7ada1892010-02-02 20:24:58 +010068 select HAVE_PERF_EVENTS
Will Deacon49863892013-09-26 12:36:35 +010069 select HAVE_PERF_REGS
70 select HAVE_PERF_USER_STACK_DUMP
Steve Cappera0ad5492014-10-09 15:29:18 -070071 select HAVE_RCU_TABLE_FREE if (SMP && ARM_LPAE)
Will Deacone513f8b2010-06-25 12:24:53 +010072 select HAVE_REGS_AND_STACK_ACCESS_API
Russell Kingb1b3f492012-10-06 17:12:25 +010073 select HAVE_SYSCALL_TRACEPOINTS
Catalin Marinasaf1839e2012-10-08 16:28:08 -070074 select HAVE_UID16
Kevin Hilman31c1fc82013-09-16 15:28:22 -070075 select HAVE_VIRT_CPU_ACCOUNTING_GEN
Thomas Gleixnerda0ec6f2013-08-14 20:43:17 +010076 select IRQ_FORCED_THREADING
Russell King171b3f02013-09-12 21:24:42 +010077 select MODULES_USE_ELF_REL
Santosh Shilimkar84f452b2013-06-30 00:28:46 -040078 select NO_BOOTMEM
Arnd Bergmannaa7d5f12015-11-19 13:20:54 +010079 select OF_EARLY_FLATTREE if OF
80 select OF_RESERVED_MEM if OF
Russell King171b3f02013-09-12 21:24:42 +010081 select OLD_SIGACTION
82 select OLD_SIGSUSPEND3
Russell Kingb1b3f492012-10-06 17:12:25 +010083 select PERF_USE_VMALLOC
84 select RTC_LIB
85 select SYS_SUPPORTS_APM_EMULATION
Russell King171b3f02013-09-12 21:24:42 +010086 # Above selects are sorted alphabetically; please add new ones
87 # according to that. Thanks.
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 help
89 The ARM series is a line of low-power-consumption RISC chip designs
Martin Michlmayrf6c89652006-02-08 21:09:07 +000090 licensed by ARM Ltd and targeted at embedded applications and
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
Martin Michlmayrf6c89652006-02-08 21:09:07 +000092 manufactured, but legacy ARM-based PC hardware remains popular in
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 Europe. There is an ARM Linux project with a web page at
94 <http://www.arm.linux.org.uk/>.
95
Russell King74facff2011-06-02 11:16:22 +010096config ARM_HAS_SG_CHAIN
Laura Abbott308c09f2014-08-08 14:23:25 -070097 select ARCH_HAS_SG_CHAIN
Russell King74facff2011-06-02 11:16:22 +010098 bool
99
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200100config NEED_SG_DMA_LENGTH
101 bool
102
103config ARM_DMA_USE_IOMMU
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200104 bool
Russell Kingb1b3f492012-10-06 17:12:25 +0100105 select ARM_HAS_SG_CHAIN
106 select NEED_SG_DMA_LENGTH
Marek Szyprowski4ce63fc2012-05-16 15:48:21 +0200107
Seung-Woo Kim60460ab2013-02-06 13:21:14 +0900108if ARM_DMA_USE_IOMMU
109
110config ARM_DMA_IOMMU_ALIGNMENT
111 int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
112 range 4 9
113 default 8
114 help
115 DMA mapping framework by default aligns all buffers to the smallest
116 PAGE_SIZE order which is greater than or equal to the requested buffer
117 size. This works well for buffers up to a few hundreds kilobytes, but
118 for larger buffers it just a waste of address space. Drivers which has
119 relatively small addressing window (like 64Mib) might run out of
120 virtual space with just a few allocations.
121
122 With this parameter you can specify the maximum PAGE_SIZE order for
123 DMA IOMMU buffers. Larger buffers will be aligned only to this
124 specified order. The order is expressed as a power of two multiplied
125 by the PAGE_SIZE.
126
127endif
128
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +0100129config MIGHT_HAVE_PCI
130 bool
131
Ralf Baechle75e71532007-02-09 17:08:58 +0000132config SYS_SUPPORTS_APM_EMULATION
133 bool
134
Linus Walleijbc581772009-09-15 17:30:37 +0100135config HAVE_TCM
136 bool
137 select GENERIC_ALLOCATOR
138
Russell Kinge119bff2010-01-10 17:23:29 +0000139config HAVE_PROC_CPU
140 bool
141
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700142config NO_IOPORT_MAP
Al Viro5ea81762007-02-11 15:41:31 +0000143 bool
Al Viro5ea81762007-02-11 15:41:31 +0000144
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145config EISA
146 bool
147 ---help---
148 The Extended Industry Standard Architecture (EISA) bus was
149 developed as an open alternative to the IBM MicroChannel bus.
150
151 The EISA bus provided some of the features of the IBM MicroChannel
152 bus while maintaining backward compatibility with cards made for
153 the older ISA bus. The EISA bus saw limited use between 1988 and
154 1995 when it was made obsolete by the PCI bus.
155
156 Say Y here if you are building a kernel for an EISA-based machine.
157
158 Otherwise, say N.
159
160config SBUS
161 bool
162
Russell Kingf16fb1e2007-04-28 09:59:37 +0100163config STACKTRACE_SUPPORT
164 bool
165 default y
166
Nicolas Pitref76e9152008-04-24 01:31:46 -0400167config HAVE_LATENCYTOP_SUPPORT
168 bool
169 depends on !SMP
170 default y
171
Russell Kingf16fb1e2007-04-28 09:59:37 +0100172config LOCKDEP_SUPPORT
173 bool
174 default y
175
Russell King7ad1bcb2006-08-27 12:07:02 +0100176config TRACE_IRQFLAGS_SUPPORT
177 bool
Arnd Bergmanncb1293e2015-05-26 15:40:44 +0100178 default !CPU_V7M
Russell King7ad1bcb2006-08-27 12:07:02 +0100179
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180config RWSEM_XCHGADD_ALGORITHM
181 bool
Will Deacon8a874112014-05-02 17:06:19 +0100182 default y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
David Howellsf0d1b0b2006-12-08 02:37:49 -0800184config ARCH_HAS_ILOG2_U32
185 bool
David Howellsf0d1b0b2006-12-08 02:37:49 -0800186
187config ARCH_HAS_ILOG2_U64
188 bool
David Howellsf0d1b0b2006-12-08 02:37:49 -0800189
Eduardo Valentin4a1b5732013-06-13 22:58:52 +0100190config ARCH_HAS_BANDGAP
191 bool
192
Stefan Agnera5f4c562015-08-13 00:01:52 +0100193config FIX_EARLYCON_MEM
194 def_bool y if MMU
195
Akinobu Mitab89c3b12006-03-26 01:39:19 -0800196config GENERIC_HWEIGHT
197 bool
198 default y
199
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200config GENERIC_CALIBRATE_DELAY
201 bool
202 default y
203
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100204config ARCH_MAY_HAVE_PC_FDC
205 bool
206
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800207config ZONE_DMA
208 bool
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800209
FUJITA Tomonoriccd7ab72010-03-10 15:23:23 -0800210config NEED_DMA_MAP_STATE
211 def_bool y
212
David A. Longc7edc9e2014-03-07 11:23:04 -0500213config ARCH_SUPPORTS_UPROBES
214 def_bool y
215
Rob Herring58af4a22012-03-20 14:33:01 -0500216config ARCH_HAS_DMA_SET_COHERENT_MASK
217 bool
218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219config GENERIC_ISA_DMA
220 bool
221
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222config FIQ
223 bool
224
Rob Herring13a50452012-02-07 09:28:22 -0600225config NEED_RET_TO_USER
226 bool
227
Al Viro034d2f52005-12-19 16:27:59 -0500228config ARCH_MTD_XIP
229 bool
230
Hyok S. Choic760fc12006-03-27 15:18:50 +0100231config VECTORS_BASE
232 hex
Hyok S. Choi6afd6fa2006-09-28 21:46:34 +0900233 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
Hyok S. Choic760fc12006-03-27 15:18:50 +0100234 default DRAM_BASE if REMAP_VECTORS_TO_RAM
235 default 0x00000000
236 help
Russell King19accfd2013-07-04 11:40:32 +0100237 The base address of exception vectors. This must be two pages
238 in size.
Hyok S. Choic760fc12006-03-27 15:18:50 +0100239
Russell Kingdc21af92011-01-04 19:09:43 +0000240config ARM_PATCH_PHYS_VIRT
Russell Kingc1beced2011-08-10 10:23:45 +0100241 bool "Patch physical to virtual translations at runtime" if EMBEDDED
242 default y
Nicolas Pitreb511d752011-02-21 06:53:35 +0100243 depends on !XIP_KERNEL && MMU
Russell Kingdc21af92011-01-04 19:09:43 +0000244 depends on !ARCH_REALVIEW || !SPARSEMEM
245 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
Russell Kingccf50e22010-03-15 19:03:06 +0000311#
312# The "ARM system type" choice list is ordered alphabetically by option
313# text. Please add new entries in the option alphabetic order.
314#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315choice
316 prompt "ARM system type"
Arnd Bergmann1420b222013-02-14 13:33:36 +0100317 default ARCH_VERSATILE if !MMU
318 default ARCH_MULTIPLATFORM if MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319
Rob Herring387798b2012-09-06 13:41:12 -0500320config ARCH_MULTIPLATFORM
321 bool "Allow multiple platforms to be selected"
Russell Kingb1b3f492012-10-06 17:12:25 +0100322 depends on MMU
Rob Herringddb902c2013-11-22 09:29:37 -0600323 select ARCH_WANT_OPTIONAL_GPIOLIB
Olof Johansson42dc8362014-03-09 12:46:59 -0700324 select ARM_HAS_SG_CHAIN
Rob Herring387798b2012-09-06 13:41:12 -0500325 select ARM_PATCH_PHYS_VIRT
326 select AUTO_ZRELADDR
Rob Herring6d0add42014-04-16 08:42:13 -0500327 select CLKSRC_OF
Dinh Nguyen66314222012-07-18 16:07:18 -0600328 select COMMON_CLK
Rob Herringddb902c2013-11-22 09:29:37 -0600329 select GENERIC_CLOCKEVENTS
Will Deacon08d38be2014-05-27 23:26:35 +0100330 select MIGHT_HAVE_PCI
Rob Herring387798b2012-09-06 13:41:12 -0500331 select MULTI_IRQ_HANDLER
Dinh Nguyen66314222012-07-18 16:07:18 -0600332 select SPARSE_IRQ
333 select USE_OF
Dinh Nguyen66314222012-07-18 16:07:18 -0600334
Stefan Agner9c77bc42015-05-20 00:03:51 +0200335config ARM_SINGLE_ARMV7M
336 bool "ARMv7-M based platforms (Cortex-M0/M3/M4)"
337 depends on !MMU
338 select ARCH_WANT_OPTIONAL_GPIOLIB
339 select ARM_NVIC
Stefan Agner499f1642015-05-21 00:35:44 +0200340 select AUTO_ZRELADDR
Stefan Agner9c77bc42015-05-20 00:03:51 +0200341 select CLKSRC_OF
342 select COMMON_CLK
343 select CPU_V7M
344 select GENERIC_CLOCKEVENTS
345 select NO_IOPORT_MAP
346 select SPARSE_IRQ
347 select USE_OF
348
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100349config ARCH_REALVIEW
350 bool "ARM Ltd. RealView family"
Russell Kingb1b3f492012-10-06 17:12:25 +0100351 select ARCH_WANT_OPTIONAL_GPIOLIB
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100352 select ARM_AMBA
Russell Kingb1b3f492012-10-06 17:12:25 +0100353 select ARM_TIMER_SP804
Linus Walleijf9a6aa42012-08-06 18:32:08 +0200354 select COMMON_CLK
355 select COMMON_CLK_VERSATILE
Catalin Marinasae30cea2008-02-04 17:26:55 +0100356 select GENERIC_CLOCKEVENTS
Russell Kingb1b3f492012-10-06 17:12:25 +0100357 select GPIO_PL061 if GPIOLIB
358 select ICST
359 select NEED_MACH_MEMORY_H
Russell Kingf4b8b312010-01-14 12:48:06 +0000360 select PLAT_VERSATILE
Pawel Moll81cc3f82014-11-25 18:17:34 +0000361 select PLAT_VERSATILE_SCHED_CLOCK
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100362 help
363 This enables support for ARM Ltd RealView boards.
364
365config ARCH_VERSATILE
366 bool "ARM Ltd. Versatile family"
Russell Kingb1b3f492012-10-06 17:12:25 +0100367 select ARCH_WANT_OPTIONAL_GPIOLIB
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100368 select ARM_AMBA
Russell Kingb1b3f492012-10-06 17:12:25 +0100369 select ARM_TIMER_SP804
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100370 select ARM_VIC
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100371 select CLKDEV_LOOKUP
Russell Kingb1b3f492012-10-06 17:12:25 +0100372 select GENERIC_CLOCKEVENTS
Kyungmin Parkaa3831c2011-07-18 16:34:54 +0900373 select HAVE_MACH_CLKDEV
Russell Kingc5a0adb2010-01-16 20:16:10 +0000374 select ICST
Russell Kingf4b8b312010-01-14 12:48:06 +0000375 select PLAT_VERSATILE
Russell Kingb1b3f492012-10-06 17:12:25 +0100376 select PLAT_VERSATILE_CLOCK
Pawel Moll81cc3f82014-11-25 18:17:34 +0000377 select PLAT_VERSATILE_SCHED_CLOCK
Linus Walleij2389d502012-10-31 22:04:31 +0100378 select VERSATILE_FPGA_IRQ
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100379 help
380 This enables support for ARM Ltd Versatile board.
381
Russell King93e22562012-10-12 14:20:52 +0100382config ARCH_CLPS711X
383 bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +0400384 select ARCH_REQUIRE_GPIOLIB
Alexander Shiyanea7d1bc2012-11-17 17:57:11 +0400385 select AUTO_ZRELADDR
Alexander Shiyanc99f72a2013-05-13 21:07:32 +0400386 select CLKSRC_MMIO
Russell King93e22562012-10-12 14:20:52 +0100387 select COMMON_CLK
388 select CPU_ARM720T
Alexander Shiyan4a8355c2012-10-10 19:45:27 +0400389 select GENERIC_CLOCKEVENTS
Alexander Shiyan65976192013-05-13 21:07:36 +0400390 select MFD_SYSCON
Alexander Shiyane4e3a372014-08-19 16:31:15 +0400391 select SOC_BUS
Russell King93e22562012-10-12 14:20:52 +0100392 help
393 Support for Cirrus Logic 711x/721x/731x based boards.
394
Russell King788c9702009-04-26 14:21:59 +0100395config ARCH_GEMINI
396 bool "Cortina Systems Gemini"
Russell King788c9702009-04-26 14:21:59 +0100397 select ARCH_REQUIRE_GPIOLIB
Linus Walleijf3372c02013-10-01 12:57:20 +0200398 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100399 select CPU_FA526
Linus Walleijf3372c02013-10-01 12:57:20 +0200400 select GENERIC_CLOCKEVENTS
Russell King788c9702009-04-26 14:21:59 +0100401 help
402 Support for the Cortina Systems Gemini family SoCs
403
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404config ARCH_EBSA110
405 bool "EBSA-110"
Russell Kingb1b3f492012-10-06 17:12:25 +0100406 select ARCH_USES_GETTIMEOFFSET
Russell Kingc7508152008-10-26 10:55:14 +0000407 select CPU_SA110
Russell Kingf7e68bb2005-05-05 14:49:01 +0100408 select ISA
Rob Herringc334bc12012-03-04 22:03:33 -0600409 select NEED_MACH_IO_H
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400410 select NEED_MACH_MEMORY_H
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700411 select NO_IOPORT_MAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 help
413 This is an evaluation board for the StrongARM processor available
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000414 from Digital. It has limited hardware on-board, including an
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 Ethernet interface, two PCMCIA sockets, two serial ports and a
416 parallel port.
417
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000418config ARCH_EP93XX
419 bool "EP93xx-based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100420 select ARCH_HAS_HOLES_MEMORYMODEL
421 select ARCH_REQUIRE_GPIOLIB
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000422 select ARM_AMBA
H Hartley Sweetenb8824c92015-06-15 10:35:06 -0700423 select ARM_PATCH_PHYS_VIRT
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000424 select ARM_VIC
H Hartley Sweetenb8824c92015-06-15 10:35:06 -0700425 select AUTO_ZRELADDR
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100426 select CLKDEV_LOOKUP
Linus Walleij000bc172015-06-15 14:34:03 +0200427 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100428 select CPU_ARM920T
Linus Walleij000bc172015-06-15 14:34:03 +0200429 select GENERIC_CLOCKEVENTS
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000430 help
431 This enables support for the Cirrus EP93xx series of CPUs.
432
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433config ARCH_FOOTBRIDGE
434 bool "FootBridge"
Russell Kingc7508152008-10-26 10:55:14 +0000435 select CPU_SA110
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 select FOOTBRIDGE
Russell King4e8d7632011-01-28 21:00:39 +0000437 select GENERIC_CLOCKEVENTS
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200438 select HAVE_IDE
Rob Herring8ef6e622012-03-01 20:48:12 -0600439 select NEED_MACH_IO_H if !MMU
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400440 select NEED_MACH_MEMORY_H
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000441 help
442 Support for systems based on the DC21285 companion chip
443 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100445config ARCH_NETX
446 bool "Hilscher NetX based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100447 select ARM_VIC
Russell King234b6ced2011-05-08 14:09:47 +0100448 select CLKSRC_MMIO
Russell Kingc7508152008-10-26 10:55:14 +0000449 select CPU_ARM926T
Uwe Kleine-König2fcfe6b2008-12-09 21:57:24 +0100450 select GENERIC_CLOCKEVENTS
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000451 help
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100452 This enables support for systems based on the Hilscher NetX Soc
453
Russell King3b938be2007-05-12 11:25:44 +0100454config ARCH_IOP13XX
455 bool "IOP13xx-based"
456 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100457 select CPU_XSC3
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400458 select NEED_MACH_MEMORY_H
Rob Herring13a50452012-02-07 09:28:22 -0600459 select NEED_RET_TO_USER
Russell Kingb1b3f492012-10-06 17:12:25 +0100460 select PCI
461 select PLAT_IOP
462 select VMSPLIT_1G
Thomas Gleixner37ebbcf2014-05-07 15:44:04 +0000463 select SPARSE_IRQ
Russell King3b938be2007-05-12 11:25:44 +0100464 help
465 Support for Intel's IOP13XX (XScale) family of processors.
466
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100467config ARCH_IOP32X
468 bool "IOP32x-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100469 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100470 select ARCH_REQUIRE_GPIOLIB
Russell Kingc7508152008-10-26 10:55:14 +0000471 select CPU_XSCALE
Linus Walleije9004f52013-09-09 11:59:51 +0200472 select GPIO_IOP
Rob Herring13a50452012-02-07 09:28:22 -0600473 select NEED_RET_TO_USER
Russell Kingf7e68bb2005-05-05 14:49:01 +0100474 select PCI
Russell Kingb1b3f492012-10-06 17:12:25 +0100475 select PLAT_IOP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000476 help
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100477 Support for Intel's 80219 and IOP32X (XScale) family of
478 processors.
479
480config ARCH_IOP33X
481 bool "IOP33x-based"
482 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100483 select ARCH_REQUIRE_GPIOLIB
Russell Kingc7508152008-10-26 10:55:14 +0000484 select CPU_XSCALE
Linus Walleije9004f52013-09-09 11:59:51 +0200485 select GPIO_IOP
Rob Herring13a50452012-02-07 09:28:22 -0600486 select NEED_RET_TO_USER
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100487 select PCI
Russell Kingb1b3f492012-10-06 17:12:25 +0100488 select PLAT_IOP
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100489 help
490 Support for Intel's IOP33X (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
Russell King3b938be2007-05-12 11:25:44 +0100492config ARCH_IXP4XX
493 bool "IXP4xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100494 depends on MMU
Rob Herring58af4a22012-03-20 14:33:01 -0500495 select ARCH_HAS_DMA_SET_COHERENT_MASK
Russell Kingb1b3f492012-10-06 17:12:25 +0100496 select ARCH_REQUIRE_GPIOLIB
Russell King51aaf812014-04-22 22:26:27 +0100497 select ARCH_SUPPORTS_BIG_ENDIAN
Russell King234b6ced2011-05-08 14:09:47 +0100498 select CLKSRC_MMIO
Russell Kingc7508152008-10-26 10:55:14 +0000499 select CPU_XSCALE
Russell Kingb1b3f492012-10-06 17:12:25 +0100500 select DMABOUNCE if PCI
Russell King3b938be2007-05-12 11:25:44 +0100501 select GENERIC_CLOCKEVENTS
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +0100502 select MIGHT_HAVE_PCI
Rob Herringc334bc12012-03-04 22:03:33 -0600503 select NEED_MACH_IO_H
Florian Fainelli9296d942013-04-09 14:29:26 +0200504 select USB_EHCI_BIG_ENDIAN_DESC
Russell King171b3f02013-09-12 21:24:42 +0100505 select USB_EHCI_BIG_ENDIAN_MMIO
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100506 help
Russell King3b938be2007-05-12 11:25:44 +0100507 Support for Intel's IXP4XX (XScale) family of processors.
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100508
Saeed Bisharaedabd382009-08-06 15:12:43 +0300509config ARCH_DOVE
510 bool "Marvell Dove"
Saeed Bisharaedabd382009-08-06 15:12:43 +0300511 select ARCH_REQUIRE_GPIOLIB
Sebastian Hesselbarth756b2532013-05-02 19:56:12 +0100512 select CPU_PJ4
Saeed Bisharaedabd382009-08-06 15:12:43 +0300513 select GENERIC_CLOCKEVENTS
Russell King0f81bd42012-09-09 20:34:13 +0100514 select MIGHT_HAVE_PCI
Russell King171b3f02013-09-12 21:24:42 +0100515 select MVEBU_MBUS
Sebastian Hesselbarth9139acd2012-11-19 10:39:55 +0100516 select PINCTRL
517 select PINCTRL_DOVE
Thomas Petazzoniabcda1d2012-09-11 14:27:27 +0200518 select PLAT_ORION_LEGACY
Saeed Bisharaedabd382009-08-06 15:12:43 +0300519 help
520 Support for the Marvell Dove SoC 88AP510
521
Russell King788c9702009-04-26 14:21:59 +0100522config ARCH_MV78XX0
523 bool "Marvell MV78xx0"
Erik Benadaa8865652009-05-28 17:08:55 -0700524 select ARCH_REQUIRE_GPIOLIB
Russell Kingb1b3f492012-10-06 17:12:25 +0100525 select CPU_FEROCEON
Russell King788c9702009-04-26 14:21:59 +0100526 select GENERIC_CLOCKEVENTS
Russell King171b3f02013-09-12 21:24:42 +0100527 select MVEBU_MBUS
Russell Kingb1b3f492012-10-06 17:12:25 +0100528 select PCI
Thomas Petazzoniabcda1d2012-09-11 14:27:27 +0200529 select PLAT_ORION_LEGACY
Russell King788c9702009-04-26 14:21:59 +0100530 help
531 Support for the following Marvell MV78xx0 series SoCs:
532 MV781x0, MV782x0.
533
534config ARCH_ORION5X
535 bool "Marvell Orion"
536 depends on MMU
Erik Benadaa8865652009-05-28 17:08:55 -0700537 select ARCH_REQUIRE_GPIOLIB
Russell Kingb1b3f492012-10-06 17:12:25 +0100538 select CPU_FEROCEON
Russell King788c9702009-04-26 14:21:59 +0100539 select GENERIC_CLOCKEVENTS
Russell King171b3f02013-09-12 21:24:42 +0100540 select MVEBU_MBUS
Russell Kingb1b3f492012-10-06 17:12:25 +0100541 select PCI
Thomas Petazzoniabcda1d2012-09-11 14:27:27 +0200542 select PLAT_ORION_LEGACY
Benjamin Cama5be9fc22015-07-14 16:25:58 +0200543 select MULTI_IRQ_HANDLER
Russell King788c9702009-04-26 14:21:59 +0100544 help
545 Support for the following Marvell Orion 5x series SoCs:
546 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
547 Orion-2 (5281), Orion-1-90 (6183).
548
549config ARCH_MMP
Haojian Zhuang2f7e8fa2009-12-04 09:41:28 -0500550 bool "Marvell PXA168/910/MMP2"
Russell King788c9702009-04-26 14:21:59 +0100551 depends on MMU
Russell King788c9702009-04-26 14:21:59 +0100552 select ARCH_REQUIRE_GPIOLIB
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100553 select CLKDEV_LOOKUP
Russell Kingb1b3f492012-10-06 17:12:25 +0100554 select GENERIC_ALLOCATOR
Russell King788c9702009-04-26 14:21:59 +0100555 select GENERIC_CLOCKEVENTS
Haojian Zhuang157d2642011-10-17 20:37:52 +0800556 select GPIO_PXA
Haojian Zhuangc24b3112012-04-12 19:02:02 +0800557 select IRQ_DOMAIN
Haojian Zhuang0f374562013-04-21 16:53:02 +0800558 select MULTI_IRQ_HANDLER
Axel Lin7c8f86a2012-11-28 14:42:35 +0800559 select PINCTRL
Russell King788c9702009-04-26 14:21:59 +0100560 select PLAT_PXA
Haojian Zhuang0bd86962010-09-08 09:42:42 -0400561 select SPARSE_IRQ
Russell King788c9702009-04-26 14:21:59 +0100562 help
Haojian Zhuang2f7e8fa2009-12-04 09:41:28 -0500563 Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
Russell King788c9702009-04-26 14:21:59 +0100564
Andrew Victorc53c9cf2007-05-11 21:01:28 +0100565config ARCH_KS8695
566 bool "Micrel/Kendin KS8695"
Hartley Sweeten98830bc2010-05-17 17:18:10 +0100567 select ARCH_REQUIRE_GPIOLIB
Linus Walleijc7e783d2012-08-29 20:27:22 +0200568 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100569 select CPU_ARM922T
Linus Walleijc7e783d2012-08-29 20:27:22 +0200570 select GENERIC_CLOCKEVENTS
Russell Kingb1b3f492012-10-06 17:12:25 +0100571 select NEED_MACH_MEMORY_H
Andrew Victorc53c9cf2007-05-11 21:01:28 +0100572 help
573 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
574 System-on-Chip devices.
575
Russell King788c9702009-04-26 14:21:59 +0100576config ARCH_W90X900
577 bool "Nuvoton W90X900 CPU"
wanzongshunc52d3d62009-06-10 15:49:32 +0100578 select ARCH_REQUIRE_GPIOLIB
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100579 select CLKDEV_LOOKUP
Russell King6fa5d5f2011-05-08 15:34:39 +0100580 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100581 select CPU_ARM926T
wanzongshun58b53692009-08-14 15:36:44 +0100582 select GENERIC_CLOCKEVENTS
Lennert Buytenhek777f9be2008-06-22 22:45:02 +0200583 help
wanzongshuna8bc4ea2009-08-14 15:38:29 +0100584 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
585 At present, the w90x900 has been renamed nuc900, regarding
586 the ARM series product line, you can login the following
587 link address to know more.
588
589 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
590 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
Tzachi Perelstein585cf172007-10-23 15:14:41 -0400591
Russell King93e22562012-10-12 14:20:52 +0100592config ARCH_LPC32XX
593 bool "NXP LPC32XX"
594 select ARCH_REQUIRE_GPIOLIB
595 select ARM_AMBA
Russell King40737232011-01-06 22:32:52 +0000596 select CLKDEV_LOOKUP
Russell King234b6ced2011-05-08 14:09:47 +0100597 select CLKSRC_MMIO
Russell King93e22562012-10-12 14:20:52 +0100598 select CPU_ARM926T
599 select GENERIC_CLOCKEVENTS
600 select HAVE_IDE
Russell King93e22562012-10-12 14:20:52 +0100601 select USE_OF
602 help
603 Support for the NXP LPC32XX family of processors
604
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605config ARCH_PXA
eric miao2c8086a2007-09-11 19:13:17 -0700606 bool "PXA2xx/PXA3xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100607 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100608 select ARCH_MTD_XIP
609 select ARCH_REQUIRE_GPIOLIB
610 select ARM_CPU_SUSPEND if PM
611 select AUTO_ZRELADDR
Robert Jarzmika1c0a6a2015-02-07 22:54:03 +0100612 select COMMON_CLK
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100613 select CLKDEV_LOOKUP
Russell King234b6ced2011-05-08 14:09:47 +0100614 select CLKSRC_MMIO
Robert Jarzmik6f6caea2014-07-14 18:52:03 +0200615 select CLKSRC_OF
Eric Miao981d0f32007-07-24 01:22:43 +0100616 select GENERIC_CLOCKEVENTS
Haojian Zhuang157d2642011-10-17 20:37:52 +0800617 select GPIO_PXA
Russell Kingb1b3f492012-10-06 17:12:25 +0100618 select HAVE_IDE
Robert Jarzmikd6cf30c2015-02-14 22:41:56 +0100619 select IRQ_DOMAIN
Russell Kingb1b3f492012-10-06 17:12:25 +0100620 select MULTI_IRQ_HANDLER
Eric Miaobd5ce432009-01-20 12:06:01 +0800621 select PLAT_PXA
Haojian Zhuang6ac6b812010-08-20 15:23:59 +0800622 select SPARSE_IRQ
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000623 help
eric miao2c8086a2007-09-11 19:13:17 -0700624 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625
626config ARCH_RPC
627 bool "RiscPC"
Russell King868e87c2015-09-28 10:31:50 +0100628 depends on MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 select ARCH_ACORN
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100630 select ARCH_MAY_HAVE_PC_FDC
Russell King07f841b2008-10-01 17:11:06 +0100631 select ARCH_SPARSEMEM_ENABLE
John Stultz5cfc8ee2010-03-24 00:22:36 +0000632 select ARCH_USES_GETTIMEOFFSET
Arnd Bergmannfa04e202014-02-26 17:39:12 +0100633 select CPU_SA110
Russell Kingb1b3f492012-10-06 17:12:25 +0100634 select FIQ
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200635 select HAVE_IDE
Russell Kingb1b3f492012-10-06 17:12:25 +0100636 select HAVE_PATA_PLATFORM
637 select ISA_DMA_API
Rob Herringc334bc12012-03-04 22:03:33 -0600638 select NEED_MACH_IO_H
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400639 select NEED_MACH_MEMORY_H
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -0700640 select NO_IOPORT_MAP
Arnd Bergmannb4811ba2013-03-13 17:36:37 +0100641 select VIRT_TO_BUS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 help
643 On the Acorn Risc-PC, Linux can support the internal IDE disk and
644 CD-ROM interface, serial and parallel port, and the floppy drive.
645
646config ARCH_SA1100
647 bool "SA1100-based"
Russell Kingb1b3f492012-10-06 17:12:25 +0100648 select ARCH_MTD_XIP
Michael Buesch7444a722008-07-25 01:46:11 -0700649 select ARCH_REQUIRE_GPIOLIB
Russell Kingb1b3f492012-10-06 17:12:25 +0100650 select ARCH_SPARSEMEM_ENABLE
651 select CLKDEV_LOOKUP
652 select CLKSRC_MMIO
653 select CPU_FREQ
654 select CPU_SA1100
655 select GENERIC_CLOCKEVENTS
Arnd Bergmannd0ee9f42011-10-01 21:10:32 +0200656 select HAVE_IDE
Dmitry Eremin-Solenikov1eca42b2014-11-28 15:56:54 +0100657 select IRQ_DOMAIN
Russell Kingb1b3f492012-10-06 17:12:25 +0100658 select ISA
Dmitry Eremin-Solenikovaffcab32014-11-28 15:55:16 +0100659 select MULTI_IRQ_HANDLER
Nicolas Pitre0cdc8b92011-09-02 22:26:55 -0400660 select NEED_MACH_MEMORY_H
Russell King375dec92012-02-23 14:29:33 +0100661 select SPARSE_IRQ
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000662 help
663 Support for StrongARM 11x0 based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900665config ARCH_S3C24XX
666 bool "Samsung S3C24XX SoCs"
Kukjin Kim53650432013-04-04 09:04:30 +0900667 select ARCH_REQUIRE_GPIOLIB
Arnd Bergmann335cce72014-03-13 14:11:16 +0100668 select ATAGS
Russell Kingb1b3f492012-10-06 17:12:25 +0100669 select CLKDEV_LOOKUP
Tomasz Figa42805062013-04-28 02:25:01 +0200670 select CLKSRC_SAMSUNG_PWM
Romain Naour7f78b6e2013-01-09 18:47:04 -0800671 select GENERIC_CLOCKEVENTS
Tomasz Figa880cf072013-06-19 01:22:20 +0900672 select GPIO_SAMSUNG
Kukjin Kim20676c12010-11-13 16:08:32 +0900673 select HAVE_S3C2410_I2C if I2C
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900674 select HAVE_S3C2410_WATCHDOG if WATCHDOG
Russell Kingb1b3f492012-10-06 17:12:25 +0100675 select HAVE_S3C_RTC if RTC_CLASS
Heiko Stuebner17453dd2013-03-07 12:38:25 +0900676 select MULTI_IRQ_HANDLER
Rob Herringc334bc12012-03-04 22:03:33 -0600677 select NEED_MACH_IO_H
Tomasz Figacd8dc7a2013-06-15 09:01:49 +0900678 select SAMSUNG_ATAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 help
Kukjin Kimb130d5c2012-02-03 14:29:23 +0900680 Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
681 and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
682 (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
683 Samsung SMDK2410 development board (and derivatives).
Ben Dooks63b1f512010-04-30 16:32:26 +0900684
Kevin Hilman7c6337e2007-04-30 19:37:19 +0100685config ARCH_DAVINCI
686 bool "TI DaVinci"
Russell Kingb1b3f492012-10-06 17:12:25 +0100687 select ARCH_HAS_HOLES_MEMORYMODEL
David Brownelldce11152008-09-07 23:41:04 -0700688 select ARCH_REQUIRE_GPIOLIB
Jean-Christop PLAGNIOL-VILLARD6d803ba2010-11-17 10:04:33 +0100689 select CLKDEV_LOOKUP
David Brownell20e99692009-05-07 09:31:42 -0700690 select GENERIC_ALLOCATOR
Russell Kingb1b3f492012-10-06 17:12:25 +0100691 select GENERIC_CLOCKEVENTS
Russell Kingdc7ad3b2011-05-22 10:01:21 +0100692 select GENERIC_IRQ_CHIP
Russell Kingb1b3f492012-10-06 17:12:25 +0100693 select HAVE_IDE
Sekhar Nori689e3312012-08-28 15:27:52 +0530694 select USE_OF
Russell Kingb1b3f492012-10-06 17:12:25 +0100695 select ZONE_DMA
Kevin Hilman7c6337e2007-04-30 19:37:19 +0100696 help
697 Support for TI's DaVinci platform.
698
Tony Lindgrena0694862013-01-11 11:24:20 -0800699config ARCH_OMAP1
700 bool "TI OMAP1"
Arnd Bergmann00a36692012-06-07 18:50:51 -0600701 depends on MMU
Russell Kingb1b3f492012-10-06 17:12:25 +0100702 select ARCH_HAS_HOLES_MEMORYMODEL
Tony Lindgrena0694862013-01-11 11:24:20 -0800703 select ARCH_OMAP
Alexey Charkov21f47fb2010-12-23 13:11:21 +0100704 select ARCH_REQUIRE_GPIOLIB
Tony Priske9a91de2012-08-03 21:00:06 +1200705 select CLKDEV_LOOKUP
viresh kumarcee37e52010-04-01 12:31:05 +0100706 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100707 select GENERIC_CLOCKEVENTS
Tony Lindgrena0694862013-01-11 11:24:20 -0800708 select GENERIC_IRQ_CHIP
Tony Lindgrena0694862013-01-11 11:24:20 -0800709 select HAVE_IDE
710 select IRQ_DOMAIN
Tony Lindgrenb6943312015-05-20 09:01:21 -0700711 select MULTI_IRQ_HANDLER
Tony Lindgrena0694862013-01-11 11:24:20 -0800712 select NEED_MACH_IO_H if PCCARD
713 select NEED_MACH_MEMORY_H
Tony Lindgren685e2d02015-05-20 09:01:21 -0700714 select SPARSE_IRQ
Alexey Charkov21f47fb2010-12-23 13:11:21 +0100715 help
Tony Lindgrena0694862013-01-11 11:24:20 -0800716 Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
Binghua Duan02c981c2011-07-08 17:40:12 +0800717
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718endchoice
719
Rob Herring387798b2012-09-06 13:41:12 -0500720menu "Multiple platform selection"
721 depends on ARCH_MULTIPLATFORM
722
723comment "CPU Core family selection"
724
Arnd Bergmannf8afae42014-03-25 22:19:00 +0100725config ARCH_MULTI_V4
726 bool "ARMv4 based platforms (FA526)"
727 depends on !ARCH_MULTI_V6_V7
728 select ARCH_MULTI_V4_V5
729 select CPU_FA526
730
Rob Herring387798b2012-09-06 13:41:12 -0500731config ARCH_MULTI_V4T
732 bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
Rob Herring387798b2012-09-06 13:41:12 -0500733 depends on !ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100734 select ARCH_MULTI_V4_V5
Arnd Bergmann24e860f2013-06-03 15:38:58 +0200735 select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
736 CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
737 CPU_ARM925T || CPU_ARM940T)
Rob Herring387798b2012-09-06 13:41:12 -0500738
739config ARCH_MULTI_V5
740 bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
Rob Herring387798b2012-09-06 13:41:12 -0500741 depends on !ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100742 select ARCH_MULTI_V4_V5
Andrew Lunn12567bb2014-02-22 20:14:54 +0100743 select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \
Arnd Bergmann24e860f2013-06-03 15:38:58 +0200744 CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
745 CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
Rob Herring387798b2012-09-06 13:41:12 -0500746
747config ARCH_MULTI_V4_V5
748 bool
749
750config ARCH_MULTI_V6
Stephen Boyd8dda05c2013-03-04 15:19:19 -0800751 bool "ARMv6 based platforms (ARM11)"
Rob Herring387798b2012-09-06 13:41:12 -0500752 select ARCH_MULTI_V6_V7
Rob Herring42f47542014-01-31 14:26:04 -0600753 select CPU_V6K
Rob Herring387798b2012-09-06 13:41:12 -0500754
755config ARCH_MULTI_V7
Stephen Boyd8dda05c2013-03-04 15:19:19 -0800756 bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
Rob Herring387798b2012-09-06 13:41:12 -0500757 default y
758 select ARCH_MULTI_V6_V7
Russell Kingb1b3f492012-10-06 17:12:25 +0100759 select CPU_V7
Rob Herring90bc8ac2014-01-31 15:32:02 -0600760 select HAVE_SMP
Rob Herring387798b2012-09-06 13:41:12 -0500761
762config ARCH_MULTI_V6_V7
763 bool
Rob Herring9352b052014-01-31 15:36:10 -0600764 select MIGHT_HAVE_CACHE_L2X0
Rob Herring387798b2012-09-06 13:41:12 -0500765
766config ARCH_MULTI_CPU_AUTO
767 def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
768 select ARCH_MULTI_V5
769
770endmenu
771
Rob Herring05e2a3d2013-12-05 10:04:54 -0600772config ARCH_VIRT
773 bool "Dummy Virtual Machine" if ARCH_MULTI_V7
Rob Herring4b8b5f22013-12-05 10:10:34 -0600774 select ARM_AMBA
Rob Herring05e2a3d2013-12-05 10:04:54 -0600775 select ARM_GIC
Jean-Philippe Brucker0b28f1d2015-10-01 13:47:18 +0100776 select ARM_GIC_V3
Rob Herring05e2a3d2013-12-05 10:04:54 -0600777 select ARM_PSCI
Rob Herring4b8b5f22013-12-05 10:10:34 -0600778 select HAVE_ARM_ARCH_TIMER
Rob Herring05e2a3d2013-12-05 10:04:54 -0600779
Russell Kingccf50e22010-03-15 19:03:06 +0000780#
781# This is sorted alphabetically by mach-* pathname. However, plat-*
782# Kconfigs may be included either alphabetically (according to the
783# plat- suffix) or along side the corresponding mach-* source.
784#
Gregory CLEMENT3e93a222012-06-04 18:38:56 +0200785source "arch/arm/mach-mvebu/Kconfig"
786
Tsahee Zidenberg445d9b32015-03-12 13:53:00 +0200787source "arch/arm/mach-alpine/Kconfig"
788
Oleksij Rempeld9bfc862014-11-24 12:08:27 +0100789source "arch/arm/mach-asm9260/Kconfig"
790
Russell King95b8f202010-01-14 11:43:54 +0000791source "arch/arm/mach-at91/Kconfig"
792
Anders Berg1d22924e2014-05-23 11:08:35 +0200793source "arch/arm/mach-axxia/Kconfig"
794
Christian Daudt8ac49e02012-11-19 09:46:10 -0800795source "arch/arm/mach-bcm/Kconfig"
796
Sebastian Hesselbarth1c37fa12013-09-09 14:36:19 +0200797source "arch/arm/mach-berlin/Kconfig"
798
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799source "arch/arm/mach-clps711x/Kconfig"
800
Anton Vorontsovd94f9442010-03-25 17:12:41 +0300801source "arch/arm/mach-cns3xxx/Kconfig"
802
Russell King95b8f202010-01-14 11:43:54 +0000803source "arch/arm/mach-davinci/Kconfig"
804
Baruch Siachdf8d7422015-01-14 10:40:30 +0200805source "arch/arm/mach-digicolor/Kconfig"
806
Russell King95b8f202010-01-14 11:43:54 +0000807source "arch/arm/mach-dove/Kconfig"
808
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000809source "arch/arm/mach-ep93xx/Kconfig"
810
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811source "arch/arm/mach-footbridge/Kconfig"
812
Paulius Zaleckas59d3a192009-03-26 10:06:08 +0200813source "arch/arm/mach-gemini/Kconfig"
814
Rob Herring387798b2012-09-06 13:41:12 -0500815source "arch/arm/mach-highbank/Kconfig"
816
Haojian Zhuang389ee0c2013-12-20 10:52:56 +0800817source "arch/arm/mach-hisi/Kconfig"
818
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819source "arch/arm/mach-integrator/Kconfig"
820
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100821source "arch/arm/mach-iop32x/Kconfig"
822
823source "arch/arm/mach-iop33x/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824
Dan Williams285f5fa2006-12-07 02:59:39 +0100825source "arch/arm/mach-iop13xx/Kconfig"
826
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827source "arch/arm/mach-ixp4xx/Kconfig"
828
Santosh Shilimkar828989a2013-06-10 11:27:13 -0400829source "arch/arm/mach-keystone/Kconfig"
830
Russell King95b8f202010-01-14 11:43:54 +0000831source "arch/arm/mach-ks8695/Kconfig"
832
Carlo Caione3b8f5032014-09-10 22:16:59 +0200833source "arch/arm/mach-meson/Kconfig"
834
Jonas Jensen17723fd32013-12-18 13:58:45 +0100835source "arch/arm/mach-moxart/Kconfig"
836
Stanislav Samsonov794d15b2008-06-22 22:45:10 +0200837source "arch/arm/mach-mv78xx0/Kconfig"
838
Shawn Guo3995eb82012-09-13 19:48:07 +0800839source "arch/arm/mach-imx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840
Matthias Bruggerf682a212014-05-13 01:06:13 +0200841source "arch/arm/mach-mediatek/Kconfig"
842
Shawn Guo1d3f33d2010-12-13 20:55:03 +0800843source "arch/arm/mach-mxs/Kconfig"
844
Russell King95b8f202010-01-14 11:43:54 +0000845source "arch/arm/mach-netx/Kconfig"
Eric Miao49cbe782009-01-20 14:15:18 +0800846
Russell King95b8f202010-01-14 11:43:54 +0000847source "arch/arm/mach-nomadik/Kconfig"
Russell King95b8f202010-01-14 11:43:54 +0000848
Daniel Tang9851ca52013-06-11 18:40:17 +1000849source "arch/arm/mach-nspire/Kconfig"
850
Tony Lindgrend48af152005-07-10 19:58:17 +0100851source "arch/arm/plat-omap/Kconfig"
852
853source "arch/arm/mach-omap1/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854
Tony Lindgren1dbae812005-11-10 14:26:51 +0000855source "arch/arm/mach-omap2/Kconfig"
856
Lennert Buytenhek9dd0b192008-03-27 14:51:41 -0400857source "arch/arm/mach-orion5x/Kconfig"
Tzachi Perelstein585cf172007-10-23 15:14:41 -0400858
Rob Herring387798b2012-09-06 13:41:12 -0500859source "arch/arm/mach-picoxcell/Kconfig"
860
Russell King95b8f202010-01-14 11:43:54 +0000861source "arch/arm/mach-pxa/Kconfig"
862source "arch/arm/plat-pxa/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863
Russell King95b8f202010-01-14 11:43:54 +0000864source "arch/arm/mach-mmp/Kconfig"
865
Kumar Gala8fc1b0f2014-01-21 17:14:10 -0600866source "arch/arm/mach-qcom/Kconfig"
867
Russell King95b8f202010-01-14 11:43:54 +0000868source "arch/arm/mach-realview/Kconfig"
869
Heiko Stuebnerd63dc052013-06-02 23:09:41 +0200870source "arch/arm/mach-rockchip/Kconfig"
871
Russell King95b8f202010-01-14 11:43:54 +0000872source "arch/arm/mach-sa1100/Kconfig"
Saeed Bisharaedabd382009-08-06 15:12:43 +0300873
Rob Herring387798b2012-09-06 13:41:12 -0500874source "arch/arm/mach-socfpga/Kconfig"
875
Arnd Bergmanna7ed0992012-12-02 15:12:47 +0100876source "arch/arm/mach-spear/Kconfig"
Ben Dooksa21765a2007-02-11 18:31:01 +0100877
Srinivas Kandagatla65ebcc12013-06-25 12:15:10 +0100878source "arch/arm/mach-sti/Kconfig"
879
Kukjin Kim85fd6d62012-02-06 09:38:19 +0900880source "arch/arm/mach-s3c24xx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881
Ben Dooks431107e2010-01-26 10:11:04 +0900882source "arch/arm/mach-s3c64xx/Kconfig"
Ben Dooksa08ab632008-10-21 14:06:39 +0100883
Kukjin Kim170f4e42010-02-24 16:40:44 +0900884source "arch/arm/mach-s5pv210/Kconfig"
885
Kukjin Kim83014572011-11-06 13:54:56 +0900886source "arch/arm/mach-exynos/Kconfig"
Rob Herringe509b282014-06-10 09:06:09 -0500887source "arch/arm/plat-samsung/Kconfig"
Changhwan Youncc0e72b2010-07-16 12:15:38 +0900888
Russell King882d01f2010-03-02 23:40:15 +0000889source "arch/arm/mach-shmobile/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890
Maxime Ripard3b526342012-11-08 12:40:16 +0100891source "arch/arm/mach-sunxi/Kconfig"
892
Barry Song156a0992012-08-23 13:41:58 +0800893source "arch/arm/mach-prima2/Kconfig"
894
Erik Gillingc5f80062010-01-21 16:53:02 -0800895source "arch/arm/mach-tegra/Kconfig"
896
Russell King95b8f202010-01-14 11:43:54 +0000897source "arch/arm/mach-u300/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898
Masahiro Yamadaba56a982015-05-08 13:07:11 +0900899source "arch/arm/mach-uniphier/Kconfig"
900
Russell King95b8f202010-01-14 11:43:54 +0000901source "arch/arm/mach-ux500/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902
903source "arch/arm/mach-versatile/Kconfig"
904
Russell Kingceade892010-02-11 21:44:53 +0000905source "arch/arm/mach-vexpress/Kconfig"
Russell King420c34e2011-01-18 20:08:06 +0000906source "arch/arm/plat-versatile/Kconfig"
Russell Kingceade892010-02-11 21:44:53 +0000907
Tony Prisk6f35f9a2012-10-11 20:13:09 +1300908source "arch/arm/mach-vt8500/Kconfig"
909
wanzongshun7ec80dd2008-12-03 03:55:38 +0100910source "arch/arm/mach-w90x900/Kconfig"
911
Jun Nieacede512015-04-28 17:18:05 +0800912source "arch/arm/mach-zx/Kconfig"
913
Josh Cartwright9a45eb62012-11-19 11:38:29 -0600914source "arch/arm/mach-zynq/Kconfig"
915
Stefan Agner499f1642015-05-21 00:35:44 +0200916# ARMv7-M architecture
917config ARCH_EFM32
918 bool "Energy Micro efm32"
919 depends on ARM_SINGLE_ARMV7M
920 select ARCH_REQUIRE_GPIOLIB
921 help
922 Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko
923 processors.
924
925config ARCH_LPC18XX
926 bool "NXP LPC18xx/LPC43xx"
927 depends on ARM_SINGLE_ARMV7M
928 select ARCH_HAS_RESET_CONTROLLER
929 select ARM_AMBA
930 select CLKSRC_LPC32XX
931 select PINCTRL
932 help
933 Support for NXP's LPC18xx Cortex-M3 and LPC43xx Cortex-M4
934 high performance microcontrollers.
935
936config ARCH_STM32
937 bool "STMicrolectronics STM32"
938 depends on ARM_SINGLE_ARMV7M
939 select ARCH_HAS_RESET_CONTROLLER
940 select ARMV7M_SYSTICK
Maxime Coquelin25263182015-05-22 23:50:52 +0200941 select CLKSRC_STM32
Stefan Agner499f1642015-05-21 00:35:44 +0200942 select RESET_CONTROLLER
943 help
944 Support for STMicroelectronics STM32 processors.
945
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946# Definitions to make life easier
947config ARCH_ACORN
948 bool
949
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100950config PLAT_IOP
951 bool
Mikael Pettersson469d30442009-10-29 11:46:54 -0700952 select GENERIC_CLOCKEVENTS
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100953
Lennert Buytenhek69b02f62008-03-27 14:51:39 -0400954config PLAT_ORION
955 bool
Russell Kingbfe45e02011-05-08 15:33:30 +0100956 select CLKSRC_MMIO
Russell Kingb1b3f492012-10-06 17:12:25 +0100957 select COMMON_CLK
Russell Kingdc7ad3b2011-05-22 10:01:21 +0100958 select GENERIC_IRQ_CHIP
Andrew Lunn278b45b2012-06-27 13:40:04 +0200959 select IRQ_DOMAIN
Lennert Buytenhek69b02f62008-03-27 14:51:39 -0400960
Thomas Petazzoniabcda1d2012-09-11 14:27:27 +0200961config PLAT_ORION_LEGACY
962 bool
963 select PLAT_ORION
964
Eric Miaobd5ce432009-01-20 12:06:01 +0800965config PLAT_PXA
966 bool
967
Russell Kingf4b8b312010-01-14 12:48:06 +0000968config PLAT_VERSATILE
969 bool
970
Alexandre Courbotd9a1bea2013-11-24 15:30:46 +0900971source "arch/arm/firmware/Kconfig"
972
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973source arch/arm/mm/Kconfig
974
Lennert Buytenhekafe4b252006-12-03 18:51:14 +0100975config IWMMXT
Sebastian Hesselbarthd93003e2014-04-24 22:58:30 +0100976 bool "Enable iWMMXt support"
977 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B
978 default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B
Lennert Buytenhekafe4b252006-12-03 18:51:14 +0100979 help
980 Enable support for iWMMXt context switching at run time if
981 running on a CPU that supports it.
982
eric miao52108642010-12-13 09:42:34 +0100983config MULTI_IRQ_HANDLER
984 bool
985 help
986 Allow each machine to specify it's own IRQ handler at run time.
987
Hyok S. Choi3b93e7b2006-06-22 11:48:56 +0100988if !MMU
989source "arch/arm/Kconfig-nommu"
990endif
991
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100992config PJ4B_ERRATA_4742
993 bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
994 depends on CPU_PJ4B && MACH_ARMADA_370
995 default y
996 help
997 When coming out of either a Wait for Interrupt (WFI) or a Wait for
998 Event (WFE) IDLE states, a specific timing sensitivity exists between
999 the retiring WFI/WFE instructions and the newly issued subsequent
1000 instructions. This sensitivity can result in a CPU hang scenario.
1001 Workaround:
1002 The software must insert either a Data Synchronization Barrier (DSB)
1003 or Data Memory Barrier (DMB) command immediately after the WFI/WFE
1004 instruction
1005
Will Deaconf0c4b8d2012-04-20 17:20:08 +01001006config ARM_ERRATA_326103
1007 bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
1008 depends on CPU_V6
1009 help
1010 Executing a SWP instruction to read-only memory does not set bit 11
1011 of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
1012 treat the access as a read, preventing a COW from occurring and
1013 causing the faulting task to livelock.
1014
Catalin Marinas9cba3cc2009-04-30 17:06:03 +01001015config ARM_ERRATA_411920
1016 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
Russell Kinge399b1a2011-01-17 15:08:32 +00001017 depends on CPU_V6 || CPU_V6K
Catalin Marinas9cba3cc2009-04-30 17:06:03 +01001018 help
1019 Invalidation of the Instruction Cache operation can
1020 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1021 It does not affect the MPCore. This option enables the ARM Ltd.
1022 recommended workaround.
1023
Catalin Marinas7ce236f2009-04-30 17:06:09 +01001024config ARM_ERRATA_430973
1025 bool "ARM errata: Stale prediction on replaced interworking branch"
1026 depends on CPU_V7
1027 help
1028 This option enables the workaround for the 430973 Cortex-A8
Russell King79403cd2015-04-13 16:14:37 +01001029 r1p* erratum. If a code sequence containing an ARM/Thumb
Catalin Marinas7ce236f2009-04-30 17:06:09 +01001030 interworking branch is replaced with another code sequence at the
1031 same virtual address, whether due to self-modifying code or virtual
1032 to physical address re-mapping, Cortex-A8 does not recover from the
1033 stale interworking branch prediction. This results in Cortex-A8
1034 executing the new code sequence in the incorrect ARM or Thumb state.
1035 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1036 and also flushes the branch target cache at every context switch.
1037 Note that setting specific bits in the ACTLR register may not be
1038 available in non-secure mode.
1039
Catalin Marinas855c5512009-04-30 17:06:15 +01001040config ARM_ERRATA_458693
1041 bool "ARM errata: Processor deadlock when a false hazard is created"
1042 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001043 depends on !ARCH_MULTIPLATFORM
Catalin Marinas855c5512009-04-30 17:06:15 +01001044 help
1045 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1046 erratum. For very specific sequences of memory operations, it is
1047 possible for a hazard condition intended for a cache line to instead
1048 be incorrectly associated with a different cache line. This false
1049 hazard might then cause a processor deadlock. The workaround enables
1050 the L1 caching of the NEON accesses and disables the PLD instruction
1051 in the ACTLR register. Note that setting specific bits in the ACTLR
1052 register may not be available in non-secure mode.
1053
Catalin Marinas0516e462009-04-30 17:06:20 +01001054config ARM_ERRATA_460075
1055 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1056 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001057 depends on !ARCH_MULTIPLATFORM
Catalin Marinas0516e462009-04-30 17:06:20 +01001058 help
1059 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1060 erratum. Any asynchronous access to the L2 cache may encounter a
1061 situation in which recent store transactions to the L2 cache are lost
1062 and overwritten with stale memory contents from external memory. The
1063 workaround disables the write-allocate mode for the L2 cache via the
1064 ACTLR register. Note that setting specific bits in the ACTLR register
1065 may not be available in non-secure mode.
1066
Will Deacon9f050272010-09-14 09:51:43 +01001067config ARM_ERRATA_742230
1068 bool "ARM errata: DMB operation may be faulty"
1069 depends on CPU_V7 && SMP
Rob Herring62e4d352012-12-21 22:42:40 +01001070 depends on !ARCH_MULTIPLATFORM
Will Deacon9f050272010-09-14 09:51:43 +01001071 help
1072 This option enables the workaround for the 742230 Cortex-A9
1073 (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1074 between two write operations may not ensure the correct visibility
1075 ordering of the two writes. This workaround sets a specific bit in
1076 the diagnostic register of the Cortex-A9 which causes the DMB
1077 instruction to behave as a DSB, ensuring the correct behaviour of
1078 the two writes.
1079
Will Deacona672e992010-09-14 09:53:02 +01001080config ARM_ERRATA_742231
1081 bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1082 depends on CPU_V7 && SMP
Rob Herring62e4d352012-12-21 22:42:40 +01001083 depends on !ARCH_MULTIPLATFORM
Will Deacona672e992010-09-14 09:53:02 +01001084 help
1085 This option enables the workaround for the 742231 Cortex-A9
1086 (r2p0..r2p2) erratum. Under certain conditions, specific to the
1087 Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1088 accessing some data located in the same cache line, may get corrupted
1089 data due to bad handling of the address hazard when the line gets
1090 replaced from one of the CPUs at the same time as another CPU is
1091 accessing it. This workaround sets specific bits in the diagnostic
1092 register of the Cortex-A9 which reduces the linefill issuing
1093 capabilities of the processor.
1094
Jon Medhurst69155792013-06-07 10:35:35 +01001095config ARM_ERRATA_643719
1096 bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
1097 depends on CPU_V7 && SMP
Russell Kinge5a5de42015-04-02 23:58:55 +01001098 default y
Jon Medhurst69155792013-06-07 10:35:35 +01001099 help
1100 This option enables the workaround for the 643719 Cortex-A9 (prior to
1101 r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
1102 register returns zero when it should return one. The workaround
1103 corrects this value, ensuring cache maintenance operations which use
1104 it behave as intended and avoiding data corruption.
1105
Will Deaconcdf357f2010-08-05 11:20:51 +01001106config ARM_ERRATA_720789
1107 bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
Dave Martine66dc742011-12-08 13:37:46 +01001108 depends on CPU_V7
Will Deaconcdf357f2010-08-05 11:20:51 +01001109 help
1110 This option enables the workaround for the 720789 Cortex-A9 (prior to
1111 r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1112 broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1113 As a consequence of this erratum, some TLB entries which should be
1114 invalidated are not, resulting in an incoherency in the system page
1115 tables. The workaround changes the TLB flushing routines to invalidate
1116 entries regardless of the ASID.
Will Deacon475d92f2010-09-28 14:02:02 +01001117
1118config ARM_ERRATA_743622
1119 bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1120 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001121 depends on !ARCH_MULTIPLATFORM
Will Deacon475d92f2010-09-28 14:02:02 +01001122 help
1123 This option enables the workaround for the 743622 Cortex-A9
Will Deaconefbc74a2012-02-24 12:12:38 +01001124 (r2p*) erratum. Under very rare conditions, a faulty
Will Deacon475d92f2010-09-28 14:02:02 +01001125 optimisation in the Cortex-A9 Store Buffer may lead to data
1126 corruption. This workaround sets a specific bit in the diagnostic
1127 register of the Cortex-A9 which disables the Store Buffer
1128 optimisation, preventing the defect from occurring. This has no
1129 visible impact on the overall performance or power consumption of the
1130 processor.
1131
Will Deacon9a27c272011-02-18 16:36:35 +01001132config ARM_ERRATA_751472
1133 bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
Dave Martinba90c512011-12-08 13:41:06 +01001134 depends on CPU_V7
Rob Herring62e4d352012-12-21 22:42:40 +01001135 depends on !ARCH_MULTIPLATFORM
Will Deacon9a27c272011-02-18 16:36:35 +01001136 help
1137 This option enables the workaround for the 751472 Cortex-A9 (prior
1138 to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1139 completion of a following broadcasted operation if the second
1140 operation is received by a CPU before the ICIALLUIS has completed,
1141 potentially leading to corrupted entries in the cache or TLB.
1142
Will Deaconfcbdc5fe2011-02-28 18:15:16 +01001143config ARM_ERRATA_754322
1144 bool "ARM errata: possible faulty MMU translations following an ASID switch"
1145 depends on CPU_V7
1146 help
1147 This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1148 r3p*) erratum. A speculative memory access may cause a page table walk
1149 which starts prior to an ASID switch but completes afterwards. This
1150 can populate the micro-TLB with a stale entry which may be hit with
1151 the new ASID. This workaround places two dsb instructions in the mm
1152 switching code so that no page table walks can cross the ASID switch.
1153
Will Deacon5dab26a2011-03-04 12:38:54 +01001154config ARM_ERRATA_754327
1155 bool "ARM errata: no automatic Store Buffer drain"
1156 depends on CPU_V7 && SMP
1157 help
1158 This option enables the workaround for the 754327 Cortex-A9 (prior to
1159 r2p0) erratum. The Store Buffer does not have any automatic draining
1160 mechanism and therefore a livelock may occur if an external agent
1161 continuously polls a memory location waiting to observe an update.
1162 This workaround defines cpu_relax() as smp_mb(), preventing correctly
1163 written polling loops from denying visibility of updates to memory.
1164
Catalin Marinas145e10e2011-08-15 11:04:41 +01001165config ARM_ERRATA_364296
1166 bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
Fabio Estevamfd832472013-07-09 18:34:01 +01001167 depends on CPU_V6
Catalin Marinas145e10e2011-08-15 11:04:41 +01001168 help
1169 This options enables the workaround for the 364296 ARM1136
1170 r0p2 erratum (possible cache data corruption with
1171 hit-under-miss enabled). It sets the undocumented bit 31 in
1172 the auxiliary control register and the FI bit in the control
1173 register, thus disabling hit-under-miss without putting the
1174 processor into full low interrupt latency mode. ARM11MPCore
1175 is not affected.
1176
Will Deaconf630c1b2011-09-15 11:45:15 +01001177config ARM_ERRATA_764369
1178 bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1179 depends on CPU_V7 && SMP
1180 help
1181 This option enables the workaround for erratum 764369
1182 affecting Cortex-A9 MPCore with two or more processors (all
1183 current revisions). Under certain timing circumstances, a data
1184 cache line maintenance operation by MVA targeting an Inner
1185 Shareable memory region may fail to proceed up to either the
1186 Point of Coherency or to the Point of Unification of the
1187 system. This workaround adds a DSB instruction before the
1188 relevant cache maintenance functions and sets a specific bit
1189 in the diagnostic control register of the SCU.
1190
Simon Horman7253b852012-09-28 02:12:45 +01001191config ARM_ERRATA_775420
1192 bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
1193 depends on CPU_V7
1194 help
1195 This option enables the workaround for the 775420 Cortex-A9 (r2p2,
1196 r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
1197 operation aborts with MMU exception, it might cause the processor
1198 to deadlock. This workaround puts DSB before executing ISB if
1199 an abort may occur on cache maintenance.
1200
Catalin Marinas93dc6882013-03-26 23:35:04 +01001201config ARM_ERRATA_798181
1202 bool "ARM errata: TLBI/DSB failure on Cortex-A15"
1203 depends on CPU_V7 && SMP
1204 help
1205 On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
1206 adequately shooting down all use of the old entries. This
1207 option enables the Linux kernel workaround for this erratum
1208 which sends an IPI to the CPUs that are running the same ASID
1209 as the one being invalidated.
1210
Will Deacon84b65042013-08-20 17:29:55 +01001211config ARM_ERRATA_773022
1212 bool "ARM errata: incorrect instructions may be executed from loop buffer"
1213 depends on CPU_V7
1214 help
1215 This option enables the workaround for the 773022 Cortex-A15
1216 (up to r0p4) erratum. In certain rare sequences of code, the
1217 loop buffer may deliver incorrect instructions. This
1218 workaround disables the loop buffer to avoid the erratum.
1219
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220endmenu
1221
1222source "arch/arm/common/Kconfig"
1223
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224menu "Bus support"
1225
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226config ISA
1227 bool
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228 help
1229 Find out whether you have ISA slots on your motherboard. ISA is the
1230 name of a bus system, i.e. the way the CPU talks to the other stuff
1231 inside your box. Other bus systems are PCI, EISA, MicroChannel
1232 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1233 newer boards don't support it. If you have ISA, say Y, otherwise N.
1234
Russell King065909b2006-01-04 15:44:16 +00001235# Select ISA DMA controller support
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236config ISA_DMA
1237 bool
Russell King065909b2006-01-04 15:44:16 +00001238 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239
Russell King065909b2006-01-04 15:44:16 +00001240# Select ISA DMA interface
Al Viro5cae8412005-05-04 05:39:22 +01001241config ISA_DMA_API
1242 bool
Al Viro5cae8412005-05-04 05:39:22 +01001243
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244config PCI
Hans Ulli Kroll0b05da72010-12-02 12:32:15 +01001245 bool "PCI support" if MIGHT_HAVE_PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246 help
1247 Find out whether you have a PCI motherboard. PCI is the name of a
1248 bus system, i.e. the way the CPU talks to the other stuff inside
1249 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1250 VESA. If you have PCI, say Y, otherwise N.
1251
Anton Vorontsov52882172010-04-19 13:20:49 +01001252config PCI_DOMAINS
1253 bool
1254 depends on PCI
1255
Lorenzo Pieralisi8c7d14742014-11-21 11:29:26 +00001256config PCI_DOMAINS_GENERIC
1257 def_bool PCI_DOMAINS
1258
Marcelo Roberto Jimenezb080ac82010-12-16 21:34:51 +01001259config PCI_NANOENGINE
1260 bool "BSE nanoEngine PCI support"
1261 depends on SA1100_NANOENGINE
1262 help
1263 Enable PCI on the BSE nanoEngine board.
1264
Matthew Wilcox36e23592007-07-10 10:54:40 -06001265config PCI_SYSCALL
1266 def_bool PCI
1267
Mike Rapoporta0113a92007-11-25 08:55:34 +01001268config PCI_HOST_ITE8152
1269 bool
1270 depends on PCI && MACH_ARMCORE
1271 default y
1272 select DMABOUNCE
1273
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274source "drivers/pci/Kconfig"
Jingoo Han3f06d152013-06-21 16:25:29 +09001275source "drivers/pci/pcie/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276
1277source "drivers/pcmcia/Kconfig"
1278
1279endmenu
1280
1281menu "Kernel Features"
1282
Dave Martin3b556582011-12-07 15:38:04 +00001283config HAVE_SMP
1284 bool
1285 help
1286 This option should be selected by machines which have an SMP-
1287 capable CPU.
1288
1289 The only effect of this option is to make the SMP-related
1290 options available to the user for configuration.
1291
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292config SMP
Russell Kingbb2d8132011-05-12 09:52:02 +01001293 bool "Symmetric Multi-Processing"
Russell Kingfbb4dda2011-01-17 18:01:58 +00001294 depends on CPU_V6K || CPU_V7
Russell Kingbc282482009-05-17 18:58:34 +01001295 depends on GENERIC_CLOCKEVENTS
Dave Martin3b556582011-12-07 15:38:04 +00001296 depends on HAVE_SMP
Jonathan Austin801bb212013-02-22 18:56:04 +00001297 depends on MMU || ARM_MPU
Arnd Bergmann03617482015-05-26 15:36:58 +01001298 select IRQ_WORK
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299 help
1300 This enables support for systems with more than one CPU. If you have
Robert Graffham4a474152014-01-23 15:55:29 -08001301 a system with only one CPU, say N. If you have a system with more
1302 than one CPU, say Y.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303
Robert Graffham4a474152014-01-23 15:55:29 -08001304 If you say N here, the kernel will run on uni- and multiprocessor
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 machines, but will use only one CPU of a multiprocessor machine. If
Robert Graffham4a474152014-01-23 15:55:29 -08001306 you say Y here, the kernel will run on many, but not all,
1307 uniprocessor machines. On a uniprocessor machine, the kernel
1308 will run faster if you say N here.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309
Paul Bolle395cf962011-08-15 02:02:26 +02001310 See also <file:Documentation/x86/i386/IO-APIC.txt>,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
Justin P. Mattock50a23e62010-10-16 10:36:23 -07001312 <http://tldp.org/HOWTO/SMP-HOWTO.html>.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313
1314 If you don't know what to do here, say N.
1315
Russell Kingf00ec482010-09-04 10:47:48 +01001316config SMP_ON_UP
Russell King5744ff42015-02-13 11:04:21 +00001317 bool "Allow booting SMP kernel on uniprocessor systems"
Jonathan Austin801bb212013-02-22 18:56:04 +00001318 depends on SMP && !XIP_KERNEL && MMU
Russell Kingf00ec482010-09-04 10:47:48 +01001319 default y
1320 help
1321 SMP kernels contain instructions which fail on non-SMP processors.
1322 Enabling this option allows the kernel to modify itself to make
1323 these instructions safe. Disabling it allows about 1K of space
1324 savings.
1325
1326 If you don't know what to do here, say Y.
1327
Vincent Guittotc9018aa2011-08-08 13:21:59 +01001328config ARM_CPU_TOPOLOGY
1329 bool "Support cpu topology definition"
1330 depends on SMP && CPU_V7
1331 default y
1332 help
1333 Support ARM cpu topology definition. The MPIDR register defines
1334 affinity between processors which is then used to describe the cpu
1335 topology of an ARM System.
1336
1337config SCHED_MC
1338 bool "Multi-core scheduler support"
1339 depends on ARM_CPU_TOPOLOGY
1340 help
1341 Multi-core scheduler support improves the CPU scheduler's decision
1342 making when dealing with multi-core CPU chips at a cost of slightly
1343 increased overhead in some places. If unsure say N here.
1344
1345config SCHED_SMT
1346 bool "SMT scheduler support"
1347 depends on ARM_CPU_TOPOLOGY
1348 help
1349 Improves the CPU scheduler's decision making when dealing with
1350 MultiThreading at a cost of slightly increased overhead in some
1351 places. If unsure say N here.
1352
Russell Kinga8cbcd92009-05-16 11:51:14 +01001353config HAVE_ARM_SCU
1354 bool
Russell Kinga8cbcd92009-05-16 11:51:14 +01001355 help
1356 This option enables support for the ARM system coherency unit
1357
Mark Rutland8a4da6e2012-11-12 14:33:44 +00001358config HAVE_ARM_ARCH_TIMER
Marc Zyngier022c03a2012-01-11 17:25:17 +00001359 bool "Architected timer support"
1360 depends on CPU_V7
Mark Rutland8a4da6e2012-11-12 14:33:44 +00001361 select ARM_ARCH_TIMER
Will Deacon0c4034622013-11-19 15:46:17 +01001362 select GENERIC_CLOCKEVENTS
Marc Zyngier022c03a2012-01-11 17:25:17 +00001363 help
1364 This option enables support for the ARM architected timer
1365
Russell Kingf32f4ce2009-05-16 12:14:21 +01001366config HAVE_ARM_TWD
1367 bool
Rob Herringda4a6862013-02-06 21:17:47 -06001368 select CLKSRC_OF if OF
Russell Kingf32f4ce2009-05-16 12:14:21 +01001369 help
1370 This options enables support for the ARM timer and watchdog unit
1371
Nicolas Pitree8db2882012-04-12 02:45:22 -04001372config MCPM
1373 bool "Multi-Cluster Power Management"
1374 depends on CPU_V7 && SMP
1375 help
1376 This option provides the common power management infrastructure
1377 for (multi-)cluster based systems, such as big.LITTLE based
1378 systems.
1379
Haojian Zhuangebf4a5c2014-04-15 14:52:00 +08001380config MCPM_QUAD_CLUSTER
1381 bool
1382 depends on MCPM
1383 help
1384 To avoid wasting resources unnecessarily, MCPM only supports up
1385 to 2 clusters by default.
1386 Platforms with 3 or 4 clusters that use MCPM must select this
1387 option to allow the additional clusters to be managed.
1388
Nicolas Pitre1c33be52012-04-12 02:56:10 -04001389config BIG_LITTLE
1390 bool "big.LITTLE support (Experimental)"
1391 depends on CPU_V7 && SMP
1392 select MCPM
1393 help
1394 This option enables support selections for the big.LITTLE
1395 system architecture.
1396
1397config BL_SWITCHER
1398 bool "big.LITTLE switcher support"
1399 depends on BIG_LITTLE && MCPM && HOTPLUG_CPU
Nicolas Pitre1c33be52012-04-12 02:56:10 -04001400 select ARM_CPU_SUSPEND
Russell King51aaf812014-04-22 22:26:27 +01001401 select CPU_PM
Nicolas Pitre1c33be52012-04-12 02:56:10 -04001402 help
1403 The big.LITTLE "switcher" provides the core functionality to
1404 transparently handle transition between a cluster of A15's
1405 and a cluster of A7's in a big.LITTLE system.
1406
Nicolas Pitreb22537c2012-04-12 03:04:28 -04001407config BL_SWITCHER_DUMMY_IF
1408 tristate "Simple big.LITTLE switcher user interface"
1409 depends on BL_SWITCHER && DEBUG_KERNEL
1410 help
1411 This is a simple and dummy char dev interface to control
1412 the big.LITTLE switcher core code. It is meant for
1413 debugging purposes only.
1414
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001415choice
1416 prompt "Memory split"
Russell King006fa252014-02-26 19:40:46 +00001417 depends on MMU
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001418 default VMSPLIT_3G
1419 help
1420 Select the desired split between kernel and user memory.
1421
1422 If you are not absolutely sure what you are doing, leave this
1423 option alone!
1424
1425 config VMSPLIT_3G
1426 bool "3G/1G user/kernel split"
Nicolas Pitre63ce4462015-09-13 03:30:11 +01001427 config VMSPLIT_3G_OPT
1428 bool "3G/1G user/kernel split (for full 1G low memory)"
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001429 config VMSPLIT_2G
1430 bool "2G/2G user/kernel split"
1431 config VMSPLIT_1G
1432 bool "1G/3G user/kernel split"
1433endchoice
1434
1435config PAGE_OFFSET
1436 hex
Russell King006fa252014-02-26 19:40:46 +00001437 default PHYS_OFFSET if !MMU
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001438 default 0x40000000 if VMSPLIT_1G
1439 default 0x80000000 if VMSPLIT_2G
Nicolas Pitre63ce4462015-09-13 03:30:11 +01001440 default 0xB0000000 if VMSPLIT_3G_OPT
Lennert Buytenhek8d5796d2008-08-25 21:03:32 +01001441 default 0xC0000000
1442
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443config NR_CPUS
1444 int "Maximum number of CPUs (2-32)"
1445 range 2 32
1446 depends on SMP
1447 default "4"
1448
Russell Kinga054a812005-11-02 22:24:33 +00001449config HOTPLUG_CPU
Russell King00b7ded2012-10-22 22:54:30 +01001450 bool "Support for hot-pluggable CPUs"
Stephen Rothwell40b31362013-05-21 13:49:35 +10001451 depends on SMP
Russell Kinga054a812005-11-02 22:24:33 +00001452 help
1453 Say Y here to experiment with turning CPUs off and on. CPUs
1454 can be controlled through /sys/devices/system/cpu.
1455
Will Deacon2bdd4242012-12-12 19:20:52 +00001456config ARM_PSCI
1457 bool "Support for the ARM Power State Coordination Interface (PSCI)"
1458 depends on CPU_V7
Mark Rutlandbe120392015-07-31 15:46:19 +01001459 select ARM_PSCI_FW
Will Deacon2bdd4242012-12-12 19:20:52 +00001460 help
1461 Say Y here if you want Linux to communicate with system firmware
1462 implementing the PSCI specification for CPU-centric power
1463 management operations described in ARM document number ARM DEN
1464 0022A ("Power State Coordination Interface System Software on
1465 ARM processors").
1466
Maxime Ripard2a6ad872013-02-03 12:24:48 +01001467# The GPIO number here must be sorted by descending number. In case of
1468# a multiplatform kernel, we just want the highest value required by the
1469# selected platforms.
Peter De Schrijver (NVIDIA)44986ab2011-12-21 10:48:45 +01001470config ARCH_NR_GPIO
1471 int
Gregory Fongb35d2e52015-05-28 19:14:10 -07001472 default 1024 if ARCH_BRCMSTB || ARCH_SHMOBILE || ARCH_TEGRA || \
1473 ARCH_ZYNQ
Tomasz Figaaa425872014-07-03 13:17:12 +02001474 default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || \
1475 SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210
Boris BREZILLONeb171a92014-04-10 15:52:46 +02001476 default 416 if ARCH_SUNXI
Olof Johansson06b851e2013-04-02 18:33:58 -07001477 default 392 if ARCH_U8500
Tony Prisk01bb9142013-03-09 18:22:30 +13001478 default 352 if ARCH_VT8500
Heiko Stuebner7b5da4c2014-05-26 00:13:51 +02001479 default 288 if ARCH_ROCKCHIP
Maxime Ripard2a6ad872013-02-03 12:24:48 +01001480 default 264 if MACH_H4700
Peter De Schrijver (NVIDIA)44986ab2011-12-21 10:48:45 +01001481 default 0
1482 help
1483 Maximum number of GPIOs in the system.
1484
1485 If unsure, leave the default value.
1486
Uwe Kleine-Königd45a3982009-08-13 20:38:17 +02001487source kernel/Kconfig.preempt
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488
Russell Kingc9218b12013-04-27 23:31:10 +01001489config HZ_FIXED
Russell Kingf8065812006-03-02 22:41:59 +00001490 int
Kukjin Kim070b8b42014-07-02 07:50:15 +09001491 default 200 if ARCH_EBSA110 || ARCH_S3C24XX || \
Kukjin Kima73ddc62011-05-11 16:27:51 +09001492 ARCH_S5PV210 || ARCH_EXYNOS4
Alexandre Belloni1164f672015-03-13 22:57:24 +01001493 default 128 if SOC_AT91RM9200
Russell King47d84682013-09-10 23:47:55 +01001494 default 0
Russell Kingc9218b12013-04-27 23:31:10 +01001495
1496choice
Russell King47d84682013-09-10 23:47:55 +01001497 depends on HZ_FIXED = 0
Russell Kingc9218b12013-04-27 23:31:10 +01001498 prompt "Timer frequency"
1499
1500config HZ_100
1501 bool "100 Hz"
1502
1503config HZ_200
1504 bool "200 Hz"
1505
1506config HZ_250
1507 bool "250 Hz"
1508
1509config HZ_300
1510 bool "300 Hz"
1511
1512config HZ_500
1513 bool "500 Hz"
1514
1515config HZ_1000
1516 bool "1000 Hz"
1517
1518endchoice
1519
1520config HZ
1521 int
Russell King47d84682013-09-10 23:47:55 +01001522 default HZ_FIXED if HZ_FIXED != 0
Russell Kingc9218b12013-04-27 23:31:10 +01001523 default 100 if HZ_100
1524 default 200 if HZ_200
1525 default 250 if HZ_250
1526 default 300 if HZ_300
1527 default 500 if HZ_500
1528 default 1000
1529
1530config SCHED_HRTICK
1531 def_bool HIGH_RES_TIMERS
Russell Kingf8065812006-03-02 22:41:59 +00001532
Catalin Marinas16c79652009-07-24 12:33:02 +01001533config THUMB2_KERNEL
Uwe Kleine-Königbc7dea02011-12-09 20:52:10 +01001534 bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
Uwe Kleine-König4477ca42013-03-21 21:02:37 +01001535 depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
Uwe Kleine-Königbc7dea02011-12-09 20:52:10 +01001536 default y if CPU_THUMBONLY
Catalin Marinas16c79652009-07-24 12:33:02 +01001537 select AEABI
1538 select ARM_ASM_UNIFIED
Arnd Bergmann89bace62011-06-10 14:12:21 +00001539 select ARM_UNWIND
Catalin Marinas16c79652009-07-24 12:33:02 +01001540 help
1541 By enabling this option, the kernel will be compiled in
1542 Thumb-2 mode. A compiler/assembler that understand the unified
1543 ARM-Thumb syntax is needed.
1544
1545 If unsure, say N.
1546
Dave Martin6f685c52011-03-03 11:41:12 +01001547config THUMB2_AVOID_R_ARM_THM_JUMP11
1548 bool "Work around buggy Thumb-2 short branch relocations in gas"
1549 depends on THUMB2_KERNEL && MODULES
1550 default y
1551 help
1552 Various binutils versions can resolve Thumb-2 branches to
1553 locally-defined, preemptible global symbols as short-range "b.n"
1554 branch instructions.
1555
1556 This is a problem, because there's no guarantee the final
1557 destination of the symbol, or any candidate locations for a
1558 trampoline, are within range of the branch. For this reason, the
1559 kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1560 relocation in modules at all, and it makes little sense to add
1561 support.
1562
1563 The symptom is that the kernel fails with an "unsupported
1564 relocation" error when loading some modules.
1565
1566 Until fixed tools are available, passing
1567 -fno-optimize-sibling-calls to gcc should prevent gcc generating
1568 code which hits this problem, at the cost of a bit of extra runtime
1569 stack usage in some cases.
1570
1571 The problem is described in more detail at:
1572 https://bugs.launchpad.net/binutils-linaro/+bug/725126
1573
1574 Only Thumb-2 kernels are affected.
1575
1576 Unless you are sure your tools don't have this problem, say Y.
1577
Catalin Marinas0becb082009-07-24 12:32:53 +01001578config ARM_ASM_UNIFIED
1579 bool
1580
Nicolas Pitre704bdda2006-01-14 16:33:50 +00001581config AEABI
1582 bool "Use the ARM EABI to compile the kernel"
1583 help
1584 This option allows for the kernel to be compiled using the latest
1585 ARM ABI (aka EABI). This is only useful if you are using a user
1586 space environment that is also compiled with EABI.
1587
1588 Since there are major incompatibilities between the legacy ABI and
1589 EABI, especially with regard to structure member alignment, this
1590 option also changes the kernel syscall calling convention to
1591 disambiguate both ABIs and allow for backward compatibility support
1592 (selected with CONFIG_OABI_COMPAT).
1593
1594 To use this you need GCC version 4.0.0 or later.
1595
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001596config OABI_COMPAT
Russell Kinga73a3ff2006-02-08 21:09:55 +00001597 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
Kees Cookd6f94fa2013-01-16 18:53:14 -08001598 depends on AEABI && !THUMB2_KERNEL
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001599 help
1600 This option preserves the old syscall interface along with the
1601 new (ARM EABI) one. It also provides a compatibility layer to
1602 intercept syscalls that have structure arguments which layout
1603 in memory differs between the legacy ABI and the new ARM EABI
1604 (only for non "thumb" binaries). This option adds a tiny
1605 overhead to all syscalls and produces a slightly larger kernel.
Kees Cook91702172013-11-09 00:51:56 +01001606
1607 The seccomp filter system will not be available when this is
1608 selected, since there is no way yet to sensibly distinguish
1609 between calling conventions during filtering.
1610
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001611 If you know you'll be using only pure EABI user space then you
1612 can say N here. If this option is not selected and you attempt
1613 to execute a legacy ABI binary then the result will be
1614 UNPREDICTABLE (in fact it can be predicted that it won't work
Kees Cookb02f8462013-11-09 00:31:11 +01001615 at all). If in doubt say N.
Nicolas Pitre6c90c872006-01-14 16:37:15 +00001616
Mel Gormaneb335752009-05-13 17:34:48 +01001617config ARCH_HAS_HOLES_MEMORYMODEL
Mel Gormane80d6a22008-08-14 11:10:14 +01001618 bool
Mel Gormane80d6a22008-08-14 11:10:14 +01001619
Russell King05944d72006-11-30 20:43:51 +00001620config ARCH_SPARSEMEM_ENABLE
1621 bool
1622
Russell King07a2f732008-10-01 21:39:58 +01001623config ARCH_SPARSEMEM_DEFAULT
1624 def_bool ARCH_SPARSEMEM_ENABLE
1625
Russell King05944d72006-11-30 20:43:51 +00001626config ARCH_SELECT_MEMORY_MODEL
Russell Kingbe370302010-05-07 17:40:33 +01001627 def_bool ARCH_SPARSEMEM_ENABLE
Yasunori Gotoc80d79d2006-04-10 22:53:53 -07001628
Will Deacon7b7bf492011-05-19 13:21:14 +01001629config HAVE_ARCH_PFN_VALID
1630 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1631
Steve Capperb8cd51a2014-10-09 15:29:20 -07001632config HAVE_GENERIC_RCU_GUP
1633 def_bool y
1634 depends on ARM_LPAE
1635
Nicolas Pitre053a96c2008-09-19 00:36:12 -04001636config HIGHMEM
Russell Kinge8db89a2011-05-12 09:53:05 +01001637 bool "High Memory Support"
1638 depends on MMU
Nicolas Pitre053a96c2008-09-19 00:36:12 -04001639 help
1640 The address space of ARM processors is only 4 Gigabytes large
1641 and it has to accommodate user address space, kernel address
1642 space as well as some memory mapped IO. That means that, if you
1643 have a large amount of physical memory and/or IO, not all of the
1644 memory can be "permanently mapped" by the kernel. The physical
1645 memory that is not permanently mapped is called "high memory".
1646
1647 Depending on the selected kernel/user memory split, minimum
1648 vmalloc space and actual amount of RAM, you may not need this
1649 option which should result in a slightly faster kernel.
1650
1651 If unsure, say n.
1652
Russell King65cec8e2009-08-17 20:02:06 +01001653config HIGHPTE
Russell King9a431bd2015-06-25 10:44:08 +01001654 bool "Allocate 2nd-level pagetables from highmem" if EXPERT
Russell King65cec8e2009-08-17 20:02:06 +01001655 depends on HIGHMEM
Russell King9a431bd2015-06-25 10:44:08 +01001656 default y
Russell Kingb4d103d2015-06-25 10:49:45 +01001657 help
1658 The VM uses one page of physical memory for each page table.
1659 For systems with a lot of processes, this can use a lot of
1660 precious low memory, eventually leading to low memory being
1661 consumed by page tables. Setting this option will allow
1662 user-space 2nd level page tables to reside in high memory.
Russell King65cec8e2009-08-17 20:02:06 +01001663
Russell Kinga5e090a2015-08-19 20:40:41 +01001664config CPU_SW_DOMAIN_PAN
1665 bool "Enable use of CPU domains to implement privileged no-access"
1666 depends on MMU && !ARM_LPAE
Jamie Iles1b8873a2010-02-02 20:25:44 +01001667 default y
1668 help
Russell Kinga5e090a2015-08-19 20:40:41 +01001669 Increase kernel security by ensuring that normal kernel accesses
1670 are unable to access userspace addresses. This can help prevent
1671 use-after-free bugs becoming an exploitable privilege escalation
1672 by ensuring that magic values (such as LIST_POISON) will always
1673 fault when dereferenced.
1674
1675 CPUs with low-vector mappings use a best-efforts implementation.
1676 Their lower 1MB needs to remain accessible for the vectors, but
1677 the remainder of userspace will become appropriately inaccessible.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001678
1679config HW_PERF_EVENTS
Mark Rutlandfa8ad782015-07-06 12:23:53 +01001680 def_bool y
1681 depends on ARM_PMU
Jamie Iles1b8873a2010-02-02 20:25:44 +01001682
Catalin Marinas1355e2a2012-07-25 14:32:38 +01001683config SYS_SUPPORTS_HUGETLBFS
1684 def_bool y
1685 depends on ARM_LPAE
1686
Catalin Marinas8d962502012-07-25 14:39:26 +01001687config HAVE_ARCH_TRANSPARENT_HUGEPAGE
1688 def_bool y
1689 depends on ARM_LPAE
1690
Steven Capper4bfab202013-07-26 14:58:22 +01001691config ARCH_WANT_GENERAL_HUGETLB
1692 def_bool y
1693
Ard Biesheuvel7d485f62014-11-24 16:54:35 +01001694config ARM_MODULE_PLTS
1695 bool "Use PLTs to allow module memory to spill over into vmalloc area"
1696 depends on MODULES
1697 help
1698 Allocate PLTs when loading modules so that jumps and calls whose
1699 targets are too far away for their relative offsets to be encoded
1700 in the instructions themselves can be bounced via veneers in the
1701 module's PLT. This allows modules to be allocated in the generic
1702 vmalloc area after the dedicated module memory area has been
1703 exhausted. The modules will use slightly more memory, but after
1704 rounding up to page size, the actual memory footprint is usually
1705 the same.
1706
1707 Say y if you are getting out of memory errors while loading modules
1708
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709source "mm/Kconfig"
1710
Magnus Dammc1b2d972010-07-05 10:00:11 +01001711config FORCE_MAX_ZONEORDER
Ulrich Hecht36d6c922015-08-14 15:51:06 +02001712 int "Maximum zone order"
Yegor Yefremov898f08e2012-10-08 14:37:53 -07001713 default "12" if SOC_AM33XX
Uwe Kleine-König6d85e2b2011-11-17 14:36:23 +01001714 default "9" if SA1111 || ARCH_EFM32
Magnus Dammc1b2d972010-07-05 10:00:11 +01001715 default "11"
1716 help
1717 The kernel memory allocator divides physically contiguous memory
1718 blocks into "zones", where each zone is a power of two number of
1719 pages. This option selects the largest power of two that the kernel
1720 keeps in the memory allocator. If you need to allocate very large
1721 blocks of physically contiguous memory, then you may need to
1722 increase this value.
1723
1724 This config option is actually maximum order plus one. For example,
1725 a value of 11 means that the largest free memory block is 2^10 pages.
1726
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727config ALIGNMENT_TRAP
1728 bool
Hyok S. Choif12d0d72006-09-26 17:36:37 +09001729 depends on CPU_CP15_MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -07001730 default y if !ARCH_EBSA110
Russell Kinge119bff2010-01-10 17:23:29 +00001731 select HAVE_PROC_CPU if PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001732 help
Matt LaPlante84eb8d02006-10-03 22:53:09 +02001733 ARM processors cannot fetch/store information which is not
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1735 address divisible by 4. On 32-bit ARM processors, these non-aligned
1736 fetch/store instructions will be emulated in software if you say
1737 here, which has a severe performance impact. This is necessary for
1738 correct operation of some network protocols. With an IP-only
1739 configuration it is safe to say N, otherwise say Y.
1740
Lennert Buytenhek39ec58f2009-03-09 14:30:09 -04001741config UACCESS_WITH_MEMCPY
Linus Walleij38ef2ad2012-09-10 16:36:37 +01001742 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
1743 depends on MMU
Lennert Buytenhek39ec58f2009-03-09 14:30:09 -04001744 default y if CPU_FEROCEON
1745 help
1746 Implement faster copy_to_user and clear_user methods for CPU
1747 cores where a 8-word STM instruction give significantly higher
1748 memory write throughput than a sequence of individual 32bit stores.
1749
1750 A possible side effect is a slight increase in scheduling latency
1751 between threads sharing the same address space if they invoke
1752 such copy operations with large buffers.
1753
1754 However, if the CPU data cache is using a write-allocate mode,
1755 this option is unlikely to provide any performance gain.
1756
Nicolas Pitre70c70d92010-08-26 15:08:35 -07001757config SECCOMP
1758 bool
1759 prompt "Enable seccomp to safely compute untrusted bytecode"
1760 ---help---
1761 This kernel feature is useful for number crunching applications
1762 that may need to compute untrusted bytecode during their
1763 execution. By using pipes or other transports made available to
1764 the process as file descriptors supporting the read/write
1765 syscalls, it's possible to isolate those applications in
1766 their own address space using seccomp. Once seccomp is
1767 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1768 and the task is only allowed to execute a few safe syscalls
1769 defined by each seccomp mode.
1770
Stefano Stabellini06e62952013-10-15 15:47:14 +00001771config SWIOTLB
1772 def_bool y
1773
1774config IOMMU_HELPER
1775 def_bool SWIOTLB
1776
Stefano Stabellinieff8d642012-09-17 14:58:17 +00001777config XEN_DOM0
1778 def_bool y
1779 depends on XEN
1780
1781config XEN
Julien Grallc2ba1f72014-09-17 14:07:06 -07001782 bool "Xen guest support on ARM"
Ian Campbell85323a92013-03-07 07:17:25 +00001783 depends on ARM && AEABI && OF
Arnd Bergmannf880b672012-10-09 10:33:52 +00001784 depends on CPU_V7 && !CPU_V6
Ian Campbell85323a92013-03-07 07:17:25 +00001785 depends on !GENERIC_ATOMIC64
Uwe Kleine-König7693dec2014-03-03 09:25:52 -05001786 depends on MMU
Russell King51aaf812014-04-22 22:26:27 +01001787 select ARCH_DMA_ADDR_T_64BIT
Stefano Stabellini17b7ab82013-04-24 18:47:18 +00001788 select ARM_PSCI
Stefano Stabellini83862cc2013-10-10 13:40:44 +00001789 select SWIOTLB_XEN
Stefano Stabellinieff8d642012-09-17 14:58:17 +00001790 help
1791 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
1792
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793endmenu
1794
1795menu "Boot options"
1796
Grant Likely9eb8f672011-04-28 14:27:20 -06001797config USE_OF
1798 bool "Flattened Device Tree support"
Russell Kingb1b3f492012-10-06 17:12:25 +01001799 select IRQ_DOMAIN
Grant Likely9eb8f672011-04-28 14:27:20 -06001800 select OF
Grant Likely9eb8f672011-04-28 14:27:20 -06001801 help
1802 Include support for flattened device tree machine descriptions.
1803
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01001804config ATAGS
1805 bool "Support for the traditional ATAGS boot data passing" if USE_OF
1806 default y
1807 help
1808 This is the traditional way of passing data to the kernel at boot
1809 time. If you are solely relying on the flattened device tree (or
1810 the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
1811 to remove ATAGS support from your kernel binary. If unsure,
1812 leave this to y.
1813
1814config DEPRECATED_PARAM_STRUCT
1815 bool "Provide old way to pass kernel parameters"
1816 depends on ATAGS
1817 help
1818 This was deprecated in 2001 and announced to live on for 5 years.
1819 Some old boot loaders still use this way.
1820
Linus Torvalds1da177e2005-04-16 15:20:36 -07001821# Compressed boot loader in ROM. Yes, we really want to ask about
1822# TEXT and BSS so we preserve their values in the config files.
1823config ZBOOT_ROM_TEXT
1824 hex "Compressed ROM boot loader base address"
1825 default "0"
1826 help
1827 The physical address at which the ROM-able zImage is to be
1828 placed in the target. Platforms which normally make use of
1829 ROM-able zImage formats normally set this to a suitable
1830 value in their defconfig file.
1831
1832 If ZBOOT_ROM is not enabled, this has no effect.
1833
1834config ZBOOT_ROM_BSS
1835 hex "Compressed ROM boot loader BSS address"
1836 default "0"
1837 help
Dan Fandrichf8c440b2006-09-20 23:28:51 +01001838 The base address of an area of read/write memory in the target
1839 for the ROM-able zImage which must be available while the
1840 decompressor is running. It must be large enough to hold the
1841 entire decompressed kernel plus an additional 128 KiB.
1842 Platforms which normally make use of ROM-able zImage formats
1843 normally set this to a suitable value in their defconfig file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001844
1845 If ZBOOT_ROM is not enabled, this has no effect.
1846
1847config ZBOOT_ROM
1848 bool "Compressed boot loader in ROM/flash"
1849 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
Russell King10968132014-01-01 11:59:44 +00001850 depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR
Linus Torvalds1da177e2005-04-16 15:20:36 -07001851 help
1852 Say Y here if you intend to execute your compressed kernel image
1853 (zImage) directly from ROM or flash. If unsure, say N.
1854
John Bonesioe2a6a3a2011-05-27 18:45:50 -04001855config ARM_APPENDED_DTB
1856 bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
Russell King10968132014-01-01 11:59:44 +00001857 depends on OF
John Bonesioe2a6a3a2011-05-27 18:45:50 -04001858 help
1859 With this option, the boot code will look for a device tree binary
1860 (DTB) appended to zImage
1861 (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1862
1863 This is meant as a backward compatibility convenience for those
1864 systems with a bootloader that can't be upgraded to accommodate
1865 the documented boot protocol using a device tree.
1866
1867 Beware that there is very little in terms of protection against
1868 this option being confused by leftover garbage in memory that might
1869 look like a DTB header after a reboot if no actual DTB is appended
1870 to zImage. Do not leave this option active in a production kernel
1871 if you don't intend to always append a DTB. Proper passing of the
1872 location into r2 of a bootloader provided DTB is always preferable
1873 to this option.
1874
Nicolas Pitreb90b9a32011-09-13 22:37:07 -04001875config ARM_ATAG_DTB_COMPAT
1876 bool "Supplement the appended DTB with traditional ATAG information"
1877 depends on ARM_APPENDED_DTB
1878 help
1879 Some old bootloaders can't be updated to a DTB capable one, yet
1880 they provide ATAGs with memory configuration, the ramdisk address,
1881 the kernel cmdline string, etc. Such information is dynamically
1882 provided by the bootloader and can't always be stored in a static
1883 DTB. To allow a device tree enabled kernel to be used with such
1884 bootloaders, this option allows zImage to extract the information
1885 from the ATAG list and store it at run time into the appended DTB.
1886
Genoud Richardd0f34a12012-06-26 16:37:59 +01001887choice
1888 prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
1889 default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1890
1891config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1892 bool "Use bootloader kernel arguments if available"
1893 help
1894 Uses the command-line options passed by the boot loader instead of
1895 the device tree bootargs property. If the boot loader doesn't provide
1896 any, the device tree bootargs property will be used.
1897
1898config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
1899 bool "Extend with bootloader kernel arguments"
1900 help
1901 The command-line arguments provided by the boot loader will be
1902 appended to the the device tree bootargs property.
1903
1904endchoice
1905
Linus Torvalds1da177e2005-04-16 15:20:36 -07001906config CMDLINE
1907 string "Default kernel command string"
1908 default ""
1909 help
1910 On some architectures (EBSA110 and CATS), there is currently no way
1911 for the boot loader to pass arguments to the kernel. For these
1912 architectures, you should supply some command-line options at build
1913 time by entering them here. As a minimum, you should specify the
1914 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1915
Victor Boivie4394c122011-05-04 17:07:55 +01001916choice
1917 prompt "Kernel command line type" if CMDLINE != ""
1918 default CMDLINE_FROM_BOOTLOADER
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01001919 depends on ATAGS
Victor Boivie4394c122011-05-04 17:07:55 +01001920
1921config CMDLINE_FROM_BOOTLOADER
1922 bool "Use bootloader kernel arguments if available"
1923 help
1924 Uses the command-line options passed by the boot loader. If
1925 the boot loader doesn't provide any, the default kernel command
1926 string provided in CMDLINE will be used.
1927
1928config CMDLINE_EXTEND
1929 bool "Extend bootloader kernel arguments"
1930 help
1931 The command-line arguments provided by the boot loader will be
1932 appended to the default kernel command string.
1933
Alexander Holler92d20402010-02-16 19:04:53 +01001934config CMDLINE_FORCE
1935 bool "Always use the default kernel command string"
Alexander Holler92d20402010-02-16 19:04:53 +01001936 help
1937 Always use the default kernel command string, even if the boot
1938 loader passes other arguments to the kernel.
1939 This is useful if you cannot or don't want to change the
1940 command-line options your boot loader passes to the kernel.
Victor Boivie4394c122011-05-04 17:07:55 +01001941endchoice
Alexander Holler92d20402010-02-16 19:04:53 +01001942
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943config XIP_KERNEL
1944 bool "Kernel Execute-In-Place from ROM"
Russell King10968132014-01-01 11:59:44 +00001945 depends on !ARM_LPAE && !ARCH_MULTIPLATFORM
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946 help
1947 Execute-In-Place allows the kernel to run from non-volatile storage
1948 directly addressable by the CPU, such as NOR flash. This saves RAM
1949 space since the text section of the kernel is not loaded from flash
1950 to RAM. Read-write sections, such as the data section and stack,
1951 are still copied to RAM. The XIP kernel is not compressed since
1952 it has to run directly from flash, so it will take more space to
1953 store it. The flash address used to link the kernel object files,
1954 and for storing it, is configuration dependent. Therefore, if you
1955 say Y here, you must know the proper physical address where to
1956 store the kernel image depending on your own flash memory usage.
1957
1958 Also note that the make target becomes "make xipImage" rather than
1959 "make zImage" or "make Image". The final kernel binary to put in
1960 ROM memory will be arch/arm/boot/xipImage.
1961
1962 If unsure, say N.
1963
1964config XIP_PHYS_ADDR
1965 hex "XIP Kernel Physical Location"
1966 depends on XIP_KERNEL
1967 default "0x00080000"
1968 help
1969 This is the physical address in your flash memory the kernel will
1970 be linked for and stored to. This address is dependent on your
1971 own flash usage.
1972
Richard Purdiec587e4a2007-02-06 21:29:00 +01001973config KEXEC
1974 bool "Kexec system call (EXPERIMENTAL)"
Stephen Warren19ab4282013-06-14 16:14:14 +01001975 depends on (!SMP || PM_SLEEP_SMP)
Arnd Bergmanncb1293e2015-05-26 15:40:44 +01001976 depends on !CPU_V7M
Dave Young2965faa2015-09-09 15:38:55 -07001977 select KEXEC_CORE
Richard Purdiec587e4a2007-02-06 21:29:00 +01001978 help
1979 kexec is a system call that implements the ability to shutdown your
1980 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante01dd2fb2007-10-20 01:34:40 +02001981 but it is independent of the system firmware. And like a reboot
Richard Purdiec587e4a2007-02-06 21:29:00 +01001982 you can start any kernel with it, not just Linux.
1983
1984 It is an ongoing process to be certain the hardware in a machine
1985 is properly shutdown, so do not be surprised if this code does not
Geert Uytterhoevenbf220692013-08-20 21:38:03 +02001986 initially work for you.
Richard Purdiec587e4a2007-02-06 21:29:00 +01001987
Richard Purdie4cd9d6f2008-01-02 00:56:46 +01001988config ATAGS_PROC
1989 bool "Export atags in procfs"
Nicolas Pitrebd51e2f2012-09-01 03:03:25 +01001990 depends on ATAGS && KEXEC
Uli Luckasb98d7292008-02-22 16:45:18 +01001991 default y
Richard Purdie4cd9d6f2008-01-02 00:56:46 +01001992 help
1993 Should the atags used to boot the kernel be exported in an "atags"
1994 file in procfs. Useful with kexec.
1995
Mika Westerbergcb5d39b2010-11-18 19:14:52 +01001996config CRASH_DUMP
1997 bool "Build kdump crash kernel (EXPERIMENTAL)"
Mika Westerbergcb5d39b2010-11-18 19:14:52 +01001998 help
1999 Generate crash dump after being started by kexec. This should
2000 be normally only set in special crash dump kernels which are
2001 loaded in the main kernel with kexec-tools into a specially
2002 reserved region and then later executed after a crash by
2003 kdump/kexec. The crash dump kernel must be compiled to a
2004 memory address not used by the main kernel
2005
2006 For more details see Documentation/kdump/kdump.txt
2007
Eric Miaoe69edc792010-07-05 15:56:50 +02002008config AUTO_ZRELADDR
2009 bool "Auto calculation of the decompressed kernel image address"
Eric Miaoe69edc792010-07-05 15:56:50 +02002010 help
2011 ZRELADDR is the physical address where the decompressed kernel
2012 image will be placed. If AUTO_ZRELADDR is selected, the address
2013 will be determined at run-time by masking the current IP with
2014 0xf8000000. This assumes the zImage being placed in the first 128MB
2015 from start of memory.
2016
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017endmenu
2018
Russell Kingac9d7ef2008-08-18 17:26:00 +01002019menu "CPU Power Management"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002020
Linus Torvalds1da177e2005-04-16 15:20:36 -07002021source "drivers/cpufreq/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002022
Russell Kingac9d7ef2008-08-18 17:26:00 +01002023source "drivers/cpuidle/Kconfig"
2024
2025endmenu
2026
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027menu "Floating point emulation"
2028
2029comment "At least one emulation must be selected"
2030
2031config FPE_NWFPE
2032 bool "NWFPE math emulation"
Dave Martin593c2522010-12-13 21:56:03 +01002033 depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034 ---help---
2035 Say Y to include the NWFPE floating point emulator in the kernel.
2036 This is necessary to run most binaries. Linux does not currently
2037 support floating point hardware so you need to say Y here even if
2038 your machine has an FPA or floating point co-processor podule.
2039
2040 You may say N here if you are going to load the Acorn FPEmulator
2041 early in the bootup.
2042
2043config FPE_NWFPE_XP
2044 bool "Support extended precision"
Lennert Buytenhekbedf1422005-11-07 21:12:08 +00002045 depends on FPE_NWFPE
Linus Torvalds1da177e2005-04-16 15:20:36 -07002046 help
2047 Say Y to include 80-bit support in the kernel floating-point
2048 emulator. Otherwise, only 32 and 64-bit support is compiled in.
2049 Note that gcc does not generate 80-bit operations by default,
2050 so in most cases this option only enlarges the size of the
2051 floating point emulator without any good reason.
2052
2053 You almost surely want to say N here.
2054
2055config FPE_FASTFPE
2056 bool "FastFPE math emulation (EXPERIMENTAL)"
Kees Cookd6f94fa2013-01-16 18:53:14 -08002057 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058 ---help---
2059 Say Y here to include the FAST floating point emulator in the kernel.
2060 This is an experimental much faster emulator which now also has full
2061 precision for the mantissa. It does not support any exceptions.
2062 It is very simple, and approximately 3-6 times faster than NWFPE.
2063
2064 It should be sufficient for most programs. It may be not suitable
2065 for scientific calculations, but you have to check this for yourself.
2066 If you do not feel you need a faster FP emulation you should better
2067 choose NWFPE.
2068
2069config VFP
2070 bool "VFP-format floating point maths"
Russell Kinge399b1a2011-01-17 15:08:32 +00002071 depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
Linus Torvalds1da177e2005-04-16 15:20:36 -07002072 help
2073 Say Y to include VFP support code in the kernel. This is needed
2074 if your hardware includes a VFP unit.
2075
2076 Please see <file:Documentation/arm/VFP/release-notes.txt> for
2077 release notes and additional status information.
2078
2079 Say N if your target does not have VFP hardware.
2080
Catalin Marinas25ebee02007-09-25 15:22:24 +01002081config VFPv3
2082 bool
2083 depends on VFP
2084 default y if CPU_V7
2085
Catalin Marinasb5872db2008-01-10 19:16:17 +01002086config NEON
2087 bool "Advanced SIMD (NEON) Extension support"
2088 depends on VFPv3 && CPU_V7
2089 help
2090 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2091 Extension.
2092
Ard Biesheuvel73c132c2013-05-16 11:41:48 +02002093config KERNEL_MODE_NEON
2094 bool "Support for NEON in kernel mode"
Russell Kingc4a30c32013-09-22 11:08:50 +01002095 depends on NEON && AEABI
Ard Biesheuvel73c132c2013-05-16 11:41:48 +02002096 help
2097 Say Y to include support for NEON in kernel mode.
2098
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099endmenu
2100
2101menu "Userspace binary formats"
2102
2103source "fs/Kconfig.binfmt"
2104
Linus Torvalds1da177e2005-04-16 15:20:36 -07002105endmenu
2106
2107menu "Power management options"
2108
Russell Kingeceab4a2005-11-15 11:31:41 +00002109source "kernel/power/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110
Johannes Bergf4cb5702007-12-08 02:14:00 +01002111config ARCH_SUSPEND_POSSIBLE
Ezequiel Garcia19a05192013-08-16 10:28:24 +01002112 depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
Uwe Kleine-Königf0d75152012-02-01 10:00:00 +01002113 CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
Johannes Bergf4cb5702007-12-08 02:14:00 +01002114 def_bool y
2115
Arnd Bergmann15e0d9e2011-10-01 21:09:39 +02002116config ARM_CPU_SUSPEND
2117 def_bool PM_SLEEP
2118
Sebastian Capella603fb422014-03-25 01:20:29 +01002119config ARCH_HIBERNATION_POSSIBLE
2120 bool
2121 depends on MMU
2122 default y if ARCH_SUSPEND_POSSIBLE
2123
Linus Torvalds1da177e2005-04-16 15:20:36 -07002124endmenu
2125
Sam Ravnborgd5950b42005-07-11 21:03:49 -07002126source "net/Kconfig"
2127
Uwe Kleine-Königac251502009-08-13 21:09:21 +02002128source "drivers/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002129
Kumar Gala916f7432015-02-26 15:49:09 -06002130source "drivers/firmware/Kconfig"
2131
Linus Torvalds1da177e2005-04-16 15:20:36 -07002132source "fs/Kconfig"
2133
Linus Torvalds1da177e2005-04-16 15:20:36 -07002134source "arch/arm/Kconfig.debug"
2135
2136source "security/Kconfig"
2137
2138source "crypto/Kconfig"
Ard Biesheuvel652ccae2015-03-10 09:47:44 +01002139if CRYPTO
2140source "arch/arm/crypto/Kconfig"
2141endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002142
2143source "lib/Kconfig"
Christoffer Dall749cf76c2013-01-20 18:28:06 -05002144
2145source "arch/arm/kvm/Kconfig"