Kconfig 63.4 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3
config ARM
	bool
	default y
4 5
	select ARCH_BINFMT_ELF_RANDOMIZE_PIE
	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
6
	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
R
Russell King 已提交
7
	select ARCH_HAVE_CUSTOM_GPIO_H
8
	select ARCH_MIGHT_HAVE_PC_PARPORT
9
	select ARCH_USE_BUILTIN_BSWAP
10
	select ARCH_USE_CMPXCHG_LOCKREF
11
	select ARCH_WANT_IPC_PARSE_VERSION
12
	select BUILDTIME_EXTABLE_SORT if MMU
R
Russell King 已提交
13
	select CLONE_BACKWARDS
14
	select CPU_PM if (SUSPEND || CPU_IDLE)
15
	select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS
16
	select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
17
	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
R
Russell King 已提交
18
	select GENERIC_IDLE_POLL_SETUP
19 20 21
	select GENERIC_IRQ_PROBE
	select GENERIC_IRQ_SHOW
	select GENERIC_PCI_IOMAP
22
	select GENERIC_SCHED_CLOCK
23 24 25 26
	select GENERIC_SMP_IDLE_THREAD
	select GENERIC_STRNCPY_FROM_USER
	select GENERIC_STRNLEN_USER
	select HARDIRQS_SW_RESEND
27
	select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT)
28
	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
J
Jason Wessel 已提交
29
	select HAVE_ARCH_KGDB
30
	select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
31
	select HAVE_ARCH_TRACEHOOK
32
	select HAVE_BPF_JIT
33
	select HAVE_CC_STACKPROTECTOR
R
Russell King 已提交
34
	select HAVE_CONTEXT_TRACKING
35 36 37 38 39
	select HAVE_C_RECORDMCOUNT
	select HAVE_DEBUG_KMEMLEAK
	select HAVE_DMA_API_DEBUG
	select HAVE_DMA_ATTRS
	select HAVE_DMA_CONTIGUOUS if MMU
40
	select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
41
	select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU
42
	select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
43
	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
44
	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
45
	select HAVE_GENERIC_DMA_COHERENT
46 47
	select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
	select HAVE_IDE if PCI || ISA || PCMCIA
48
	select HAVE_IRQ_TIME_ACCOUNTING
49
	select HAVE_KERNEL_GZIP
50
	select HAVE_KERNEL_LZ4
51
	select HAVE_KERNEL_LZMA
52
	select HAVE_KERNEL_LZO
53
	select HAVE_KERNEL_XZ
54 55 56
	select HAVE_KPROBES if !XIP_KERNEL
	select HAVE_KRETPROBES if (HAVE_KPROBES)
	select HAVE_MEMBLOCK
R
Russell King 已提交
57
	select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
58
	select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
59
	select HAVE_PERF_EVENTS
60 61
	select HAVE_PERF_REGS
	select HAVE_PERF_USER_STACK_DUMP
62
	select HAVE_REGS_AND_STACK_ACCESS_API
63
	select HAVE_SYSCALL_TRACEPOINTS
64
	select HAVE_UID16
65
	select HAVE_VIRT_CPU_ACCOUNTING_GEN
66
	select IRQ_FORCED_THREADING
R
Russell King 已提交
67
	select MODULES_USE_ELF_REL
68
	select NO_BOOTMEM
R
Russell King 已提交
69 70
	select OLD_SIGACTION
	select OLD_SIGSUSPEND3
71 72 73
	select PERF_USE_VMALLOC
	select RTC_LIB
	select SYS_SUPPORTS_APM_EMULATION
R
Russell King 已提交
74 75
	# Above selects are sorted alphabetically; please add new ones
	# according to that.  Thanks.
L
Linus Torvalds 已提交
76 77
	help
	  The ARM series is a line of low-power-consumption RISC chip designs
78
	  licensed by ARM Ltd and targeted at embedded applications and
L
Linus Torvalds 已提交
79
	  handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
80
	  manufactured, but legacy ARM-based PC hardware remains popular in
L
Linus Torvalds 已提交
81 82 83
	  Europe.  There is an ARM Linux project with a web page at
	  <http://www.arm.linux.org.uk/>.

84 85 86
config ARM_HAS_SG_CHAIN
	bool

87 88 89 90 91
config NEED_SG_DMA_LENGTH
	bool

config ARM_DMA_USE_IOMMU
	bool
92 93
	select ARM_HAS_SG_CHAIN
	select NEED_SG_DMA_LENGTH
94

95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115
if ARM_DMA_USE_IOMMU

config ARM_DMA_IOMMU_ALIGNMENT
	int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
	range 4 9
	default 8
	help
	  DMA mapping framework by default aligns all buffers to the smallest
	  PAGE_SIZE order which is greater than or equal to the requested buffer
	  size. This works well for buffers up to a few hundreds kilobytes, but
	  for larger buffers it just a waste of address space. Drivers which has
	  relatively small addressing window (like 64Mib) might run out of
	  virtual space with just a few allocations.

	  With this parameter you can specify the maximum PAGE_SIZE order for
	  DMA IOMMU buffers. Larger buffers will be aligned only to this
	  specified order. The order is expressed as a power of two multiplied
	  by the PAGE_SIZE.

endif

116 117 118
config MIGHT_HAVE_PCI
	bool

119 120 121
config SYS_SUPPORTS_APM_EMULATION
	bool

122 123 124 125
config HAVE_TCM
	bool
	select GENERIC_ALLOCATOR

126 127 128
config HAVE_PROC_CPU
	bool

129
config NO_IOPORT_MAP
A
Al Viro 已提交
130 131
	bool

L
Linus Torvalds 已提交
132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149
config EISA
	bool
	---help---
	  The Extended Industry Standard Architecture (EISA) bus was
	  developed as an open alternative to the IBM MicroChannel bus.

	  The EISA bus provided some of the features of the IBM MicroChannel
	  bus while maintaining backward compatibility with cards made for
	  the older ISA bus.  The EISA bus saw limited use between 1988 and
	  1995 when it was made obsolete by the PCI bus.

	  Say Y here if you are building a kernel for an EISA-based machine.

	  Otherwise, say N.

config SBUS
	bool

150 151 152 153
config STACKTRACE_SUPPORT
	bool
	default y

N
Nicolas Pitre 已提交
154 155 156 157 158
config HAVE_LATENCYTOP_SUPPORT
	bool
	depends on !SMP
	default y

159 160 161 162
config LOCKDEP_SUPPORT
	bool
	default y

R
Russell King 已提交
163 164 165 166
config TRACE_IRQFLAGS_SUPPORT
	bool
	default y

L
Linus Torvalds 已提交
167 168
config RWSEM_XCHGADD_ALGORITHM
	bool
169
	default y
L
Linus Torvalds 已提交
170

171 172 173 174 175 176
config ARCH_HAS_ILOG2_U32
	bool

config ARCH_HAS_ILOG2_U64
	bool

177 178 179
config ARCH_HAS_BANDGAP
	bool

180 181 182 183
config GENERIC_HWEIGHT
	bool
	default y

L
Linus Torvalds 已提交
184 185 186 187
config GENERIC_CALIBRATE_DELAY
	bool
	default y

188 189 190
config ARCH_MAY_HAVE_PC_FDC
	bool

191 192 193
config ZONE_DMA
	bool

194 195 196
config NEED_DMA_MAP_STATE
       def_bool y

D
David A. Long 已提交
197 198 199
config ARCH_SUPPORTS_UPROBES
	def_bool y

200 201 202
config ARCH_HAS_DMA_SET_COHERENT_MASK
	bool

L
Linus Torvalds 已提交
203 204 205 206 207 208
config GENERIC_ISA_DMA
	bool

config FIQ
	bool

209 210 211
config NEED_RET_TO_USER
	bool

212 213 214
config ARCH_MTD_XIP
	bool

215 216
config VECTORS_BASE
	hex
217
	default 0xffff0000 if MMU || CPU_HIGH_VECTOR
218 219 220
	default DRAM_BASE if REMAP_VECTORS_TO_RAM
	default 0x00000000
	help
R
Russell King 已提交
221 222
	  The base address of exception vectors.  This must be two pages
	  in size.
223

224
config ARM_PATCH_PHYS_VIRT
225 226
	bool "Patch physical to virtual translations at runtime" if EMBEDDED
	default y
N
Nicolas Pitre 已提交
227
	depends on !XIP_KERNEL && MMU
228 229
	depends on !ARCH_REALVIEW || !SPARSEMEM
	help
230 231 232
	  Patch phys-to-virt and virt-to-phys translation functions at
	  boot and module load time according to the position of the
	  kernel in system memory.
233

234
	  This can only be used with non-XIP MMU kernels where the base
235
	  of physical memory is at a 16MB boundary.
236

237 238 239
	  Only disable this option if you know that you do not require
	  this feature (eg, building a kernel for a single machine) and
	  you need to shrink the kernel to the minimal size.
240

241 242 243 244 245 246 247
config NEED_MACH_GPIO_H
	bool
	help
	  Select this when mach/gpio.h is required to provide special
	  definitions for this platform. The need for mach/gpio.h should
	  be avoided when possible.

248 249 250 251 252 253 254
config NEED_MACH_IO_H
	bool
	help
	  Select this when mach/io.h is required to provide special
	  definitions for this platform.  The need for mach/io.h should
	  be avoided when possible.

255
config NEED_MACH_MEMORY_H
256 257
	bool
	help
258 259 260
	  Select this when mach/memory.h is required to provide special
	  definitions for this platform.  The need for mach/memory.h should
	  be avoided when possible.
261

262
config PHYS_OFFSET
263
	hex "Physical address of main memory" if MMU
264
	depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
265
	default DRAM_BASE if !MMU
266
	help
267 268
	  Please provide the physical address corresponding to the
	  location of main memory in your system.
269

270 271 272 273
config GENERIC_BUG
	def_bool y
	depends on BUG

L
Linus Torvalds 已提交
274 275
source "init/Kconfig"

276 277
source "kernel/Kconfig.freezer"

L
Linus Torvalds 已提交
278 279
menu "System Type"

280 281 282 283 284 285 286
config MMU
	bool "MMU-based Paged Memory Management Support"
	default y
	help
	  Select if you want MMU-based virtualised addressing space
	  support by paged memory management. If unsure, say 'Y'.

287 288 289 290
#
# The "ARM system type" choice list is ordered alphabetically by option
# text.  Please add new entries in the option alphabetic order.
#
L
Linus Torvalds 已提交
291 292
choice
	prompt "ARM system type"
293 294
	default ARCH_VERSATILE if !MMU
	default ARCH_MULTIPLATFORM if MMU
L
Linus Torvalds 已提交
295

R
Rob Herring 已提交
296 297
config ARCH_MULTIPLATFORM
	bool "Allow multiple platforms to be selected"
298
	depends on MMU
299
	select ARCH_WANT_OPTIONAL_GPIOLIB
300
	select ARM_HAS_SG_CHAIN
R
Rob Herring 已提交
301 302
	select ARM_PATCH_PHYS_VIRT
	select AUTO_ZRELADDR
303
	select CLKSRC_OF
304
	select COMMON_CLK
305
	select GENERIC_CLOCKEVENTS
306
	select MIGHT_HAVE_PCI
R
Rob Herring 已提交
307
	select MULTI_IRQ_HANDLER
308 309 310
	select SPARSE_IRQ
	select USE_OF

311 312
config ARCH_INTEGRATOR
	bool "ARM Ltd. Integrator family"
313
	select ARM_AMBA
314 315
	select ARM_PATCH_PHYS_VIRT
	select AUTO_ZRELADDR
316
	select COMMON_CLK
317
	select COMMON_CLK_VERSATILE
318
	select GENERIC_CLOCKEVENTS
319
	select HAVE_TCM
320
	select ICST
321 322
	select MULTI_IRQ_HANDLER
	select NEED_MACH_MEMORY_H
323
	select PLAT_VERSATILE
324
	select SPARSE_IRQ
325
	select USE_OF
326
	select VERSATILE_FPGA_IRQ
327 328 329 330 331
	help
	  Support for ARM's Integrator platform.

config ARCH_REALVIEW
	bool "ARM Ltd. RealView family"
332
	select ARCH_WANT_OPTIONAL_GPIOLIB
333
	select ARM_AMBA
334
	select ARM_TIMER_SP804
335 336
	select COMMON_CLK
	select COMMON_CLK_VERSATILE
337
	select GENERIC_CLOCKEVENTS
338
	select GPIO_PL061 if GPIOLIB
339
	select ICST
340
	select NEED_MACH_MEMORY_H
341 342
	select PLAT_VERSATILE
	select PLAT_VERSATILE_CLCD
343 344 345 346 347
	help
	  This enables support for ARM Ltd RealView boards.

config ARCH_VERSATILE
	bool "ARM Ltd. Versatile family"
348
	select ARCH_WANT_OPTIONAL_GPIOLIB
349
	select ARM_AMBA
350
	select ARM_TIMER_SP804
351
	select ARM_VIC
352
	select CLKDEV_LOOKUP
353
	select GENERIC_CLOCKEVENTS
354
	select HAVE_MACH_CLKDEV
355
	select ICST
356
	select PLAT_VERSATILE
357
	select PLAT_VERSATILE_CLCD
358
	select PLAT_VERSATILE_CLOCK
359
	select VERSATILE_FPGA_IRQ
360 361 362
	help
	  This enables support for ARM Ltd Versatile board.

363 364
config ARCH_AT91
	bool "Atmel AT91"
365
	select ARCH_REQUIRE_GPIOLIB
366
	select CLKDEV_LOOKUP
367
	select IRQ_DOMAIN
R
Rob Herring 已提交
368
	select NEED_MACH_IO_H if PCCARD
369 370
	select PINCTRL
	select PINCTRL_AT91 if USE_OF
371
	help
372 373
	  This enables support for systems based on Atmel
	  AT91RM9200 and AT91SAM9* processors.
374

375 376
config ARCH_CLPS711X
	bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
377
	select ARCH_REQUIRE_GPIOLIB
378
	select AUTO_ZRELADDR
379
	select CLKSRC_MMIO
380 381
	select COMMON_CLK
	select CPU_ARM720T
382
	select GENERIC_CLOCKEVENTS
383
	select MFD_SYSCON
384 385 386
	help
	  Support for Cirrus Logic 711x/721x/731x based boards.

387 388 389
config ARCH_GEMINI
	bool "Cortina Systems Gemini"
	select ARCH_REQUIRE_GPIOLIB
390
	select CLKSRC_MMIO
391
	select CPU_FA526
392
	select GENERIC_CLOCKEVENTS
393 394 395
	help
	  Support for the Cortina Systems Gemini family SoCs

L
Linus Torvalds 已提交
396 397
config ARCH_EBSA110
	bool "EBSA-110"
398
	select ARCH_USES_GETTIMEOFFSET
399
	select CPU_SA110
400
	select ISA
401
	select NEED_MACH_IO_H
402
	select NEED_MACH_MEMORY_H
403
	select NO_IOPORT_MAP
L
Linus Torvalds 已提交
404 405
	help
	  This is an evaluation board for the StrongARM processor available
406
	  from Digital. It has limited hardware on-board, including an
L
Linus Torvalds 已提交
407 408 409
	  Ethernet interface, two PCMCIA sockets, two serial ports and a
	  parallel port.

410 411 412 413 414
config ARCH_EFM32
	bool "Energy Micro efm32"
	depends on !MMU
	select ARCH_REQUIRE_GPIOLIB
	select ARM_NVIC
415
	select AUTO_ZRELADDR
416 417 418 419 420
	select CLKSRC_OF
	select COMMON_CLK
	select CPU_V7M
	select GENERIC_CLOCKEVENTS
	select NO_DMA
421
	select NO_IOPORT_MAP
422 423 424 425 426 427
	select SPARSE_IRQ
	select USE_OF
	help
	  Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko
	  processors.

428 429
config ARCH_EP93XX
	bool "EP93xx-based"
430 431 432
	select ARCH_HAS_HOLES_MEMORYMODEL
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_USES_GETTIMEOFFSET
433 434
	select ARM_AMBA
	select ARM_VIC
435
	select CLKDEV_LOOKUP
436
	select CPU_ARM920T
437
	select NEED_MACH_MEMORY_H
438 439 440
	help
	  This enables support for the Cirrus EP93xx series of CPUs.

L
Linus Torvalds 已提交
441 442
config ARCH_FOOTBRIDGE
	bool "FootBridge"
443
	select CPU_SA110
L
Linus Torvalds 已提交
444
	select FOOTBRIDGE
445
	select GENERIC_CLOCKEVENTS
446
	select HAVE_IDE
447
	select NEED_MACH_IO_H if !MMU
448
	select NEED_MACH_MEMORY_H
449 450 451
	help
	  Support for systems based on the DC21285 companion chip
	  ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
L
Linus Torvalds 已提交
452

453 454
config ARCH_NETX
	bool "Hilscher NetX based"
455
	select ARM_VIC
456
	select CLKSRC_MMIO
457
	select CPU_ARM926T
458
	select GENERIC_CLOCKEVENTS
459
	help
460 461
	  This enables support for systems based on the Hilscher NetX Soc

462 463 464
config ARCH_IOP13XX
	bool "IOP13xx-based"
	depends on MMU
465
	select CPU_XSC3
466
	select NEED_MACH_MEMORY_H
467
	select NEED_RET_TO_USER
468 469 470
	select PCI
	select PLAT_IOP
	select VMSPLIT_1G
471
	select SPARSE_IRQ
472 473 474
	help
	  Support for Intel's IOP13XX (XScale) family of processors.

475 476
config ARCH_IOP32X
	bool "IOP32x-based"
477
	depends on MMU
478
	select ARCH_REQUIRE_GPIOLIB
479
	select CPU_XSCALE
480
	select GPIO_IOP
481
	select NEED_RET_TO_USER
482
	select PCI
483
	select PLAT_IOP
484
	help
485 486 487 488 489 490
	  Support for Intel's 80219 and IOP32X (XScale) family of
	  processors.

config ARCH_IOP33X
	bool "IOP33x-based"
	depends on MMU
491
	select ARCH_REQUIRE_GPIOLIB
492
	select CPU_XSCALE
493
	select GPIO_IOP
494
	select NEED_RET_TO_USER
495
	select PCI
496
	select PLAT_IOP
497 498
	help
	  Support for Intel's IOP33X (XScale) family of processors.
L
Linus Torvalds 已提交
499

500 501
config ARCH_IXP4XX
	bool "IXP4xx-based"
502
	depends on MMU
503
	select ARCH_HAS_DMA_SET_COHERENT_MASK
504
	select ARCH_REQUIRE_GPIOLIB
505
	select ARCH_SUPPORTS_BIG_ENDIAN
506
	select CLKSRC_MMIO
507
	select CPU_XSCALE
508
	select DMABOUNCE if PCI
509
	select GENERIC_CLOCKEVENTS
510
	select MIGHT_HAVE_PCI
511
	select NEED_MACH_IO_H
512
	select USB_EHCI_BIG_ENDIAN_DESC
R
Russell King 已提交
513
	select USB_EHCI_BIG_ENDIAN_MMIO
514
	help
515
	  Support for Intel's IXP4XX (XScale) family of processors.
516

517 518 519
config ARCH_DOVE
	bool "Marvell Dove"
	select ARCH_REQUIRE_GPIOLIB
520
	select CPU_PJ4
521
	select GENERIC_CLOCKEVENTS
522
	select MIGHT_HAVE_PCI
R
Russell King 已提交
523
	select MVEBU_MBUS
524 525
	select PINCTRL
	select PINCTRL_DOVE
526
	select PLAT_ORION_LEGACY
527 528 529
	help
	  Support for the Marvell Dove SoC 88AP510

530 531
config ARCH_KIRKWOOD
	bool "Marvell Kirkwood"
532
	select ARCH_REQUIRE_GPIOLIB
533
	select CPU_FEROCEON
534
	select GENERIC_CLOCKEVENTS
R
Russell King 已提交
535
	select MVEBU_MBUS
536
	select PCI
537
	select PCI_QUIRKS
538 539
	select PINCTRL
	select PINCTRL_KIRKWOOD
540
	select PLAT_ORION_LEGACY
541 542 543 544
	help
	  Support for the following Marvell Kirkwood series SoCs:
	  88F6180, 88F6192 and 88F6281.

545 546
config ARCH_MV78XX0
	bool "Marvell MV78xx0"
547
	select ARCH_REQUIRE_GPIOLIB
548
	select CPU_FEROCEON
549
	select GENERIC_CLOCKEVENTS
R
Russell King 已提交
550
	select MVEBU_MBUS
551
	select PCI
552
	select PLAT_ORION_LEGACY
553 554 555 556
	help
	  Support for the following Marvell MV78xx0 series SoCs:
	  MV781x0, MV782x0.

557
config ARCH_ORION5X
558 559
	bool "Marvell Orion"
	depends on MMU
560
	select ARCH_REQUIRE_GPIOLIB
561
	select CPU_FEROCEON
562
	select GENERIC_CLOCKEVENTS
R
Russell King 已提交
563
	select MVEBU_MBUS
564
	select PCI
565
	select PLAT_ORION_LEGACY
566
	help
567
	  Support for the following Marvell Orion 5x series SoCs:
568
	  Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
569
	  Orion-2 (5281), Orion-1-90 (6183).
570

571
config ARCH_MMP
572
	bool "Marvell PXA168/910/MMP2"
573 574
	depends on MMU
	select ARCH_REQUIRE_GPIOLIB
575
	select CLKDEV_LOOKUP
576
	select GENERIC_ALLOCATOR
577
	select GENERIC_CLOCKEVENTS
578
	select GPIO_PXA
H
Haojian Zhuang 已提交
579
	select IRQ_DOMAIN
H
Haojian Zhuang 已提交
580
	select MULTI_IRQ_HANDLER
A
Axel Lin 已提交
581
	select PINCTRL
582
	select PLAT_PXA
H
Haojian Zhuang 已提交
583
	select SPARSE_IRQ
584
	help
585
	  Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
586 587 588

config ARCH_KS8695
	bool "Micrel/Kendin KS8695"
589
	select ARCH_REQUIRE_GPIOLIB
590
	select CLKSRC_MMIO
591
	select CPU_ARM922T
592
	select GENERIC_CLOCKEVENTS
593
	select NEED_MACH_MEMORY_H
594 595 596 597 598 599
	help
	  Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
	  System-on-Chip devices.

config ARCH_W90X900
	bool "Nuvoton W90X900 CPU"
600
	select ARCH_REQUIRE_GPIOLIB
601
	select CLKDEV_LOOKUP
602
	select CLKSRC_MMIO
603
	select CPU_ARM926T
604
	select GENERIC_CLOCKEVENTS
605
	help
606 607 608 609 610 611 612
	  Support for Nuvoton (Winbond logic dept.) ARM9 processor,
	  At present, the w90x900 has been renamed nuc900, regarding
	  the ARM series product line, you can login the following
	  link address to know more.

	  <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
		ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
613

614 615 616 617 618 619 620 621 622 623 624 625 626
config ARCH_LPC32XX
	bool "NXP LPC32XX"
	select ARCH_REQUIRE_GPIOLIB
	select ARM_AMBA
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
	select CPU_ARM926T
	select GENERIC_CLOCKEVENTS
	select HAVE_IDE
	select USE_OF
	help
	  Support for the NXP LPC32XX family of processors

L
Linus Torvalds 已提交
627
config ARCH_PXA
E
eric miao 已提交
628
	bool "PXA2xx/PXA3xx-based"
629
	depends on MMU
630 631 632 633
	select ARCH_MTD_XIP
	select ARCH_REQUIRE_GPIOLIB
	select ARM_CPU_SUSPEND if PM
	select AUTO_ZRELADDR
634
	select CLKDEV_LOOKUP
635
	select CLKSRC_MMIO
636
	select CLKSRC_OF
637
	select GENERIC_CLOCKEVENTS
638
	select GPIO_PXA
639
	select HAVE_IDE
640 641 642
	select MULTI_IRQ_HANDLER
	select PLAT_PXA
	select SPARSE_IRQ
643
	help
E
eric miao 已提交
644
	  Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
L
Linus Torvalds 已提交
645

646 647
config ARCH_MSM
	bool "Qualcomm MSM (non-multiplatform)"
P
Pavel Machek 已提交
648
	select ARCH_REQUIRE_GPIOLIB
649
	select COMMON_CLK
650
	select GENERIC_CLOCKEVENTS
651
	help
652 653 654 655 656
	  Support for Qualcomm MSM/QSD based systems.  This runs on the
	  apps processor of the MSM/QSD and depends on a shared memory
	  interface to the modem processor which runs the baseband
	  stack and controls some vital subsystems
	  (clock and power control, etc).
657

658
config ARCH_SHMOBILE_LEGACY
659
	bool "Renesas ARM SoCs (non-multiplatform)"
660
	select ARCH_SHMOBILE
661
	select ARM_PATCH_PHYS_VIRT
P
Paul Mundt 已提交
662
	select CLKDEV_LOOKUP
663
	select GENERIC_CLOCKEVENTS
664
	select HAVE_ARM_SCU if SMP
665
	select HAVE_ARM_TWD if SMP
666
	select HAVE_MACH_CLKDEV
667
	select HAVE_SMP
668
	select MIGHT_HAVE_CACHE_L2X0
669
	select MULTI_IRQ_HANDLER
670
	select NO_IOPORT_MAP
671
	select PINCTRL
672 673
	select PM_GENERIC_DOMAINS if PM
	select SPARSE_IRQ
674
	help
675 676 677
	  Support for Renesas ARM SoC platforms using a non-multiplatform
	  kernel. This includes the SH-Mobile, R-Mobile, EMMA-Mobile, R-Car
	  and RZ families.
678

L
Linus Torvalds 已提交
679 680 681
config ARCH_RPC
	bool "RiscPC"
	select ARCH_ACORN
682
	select ARCH_MAY_HAVE_PC_FDC
683
	select ARCH_SPARSEMEM_ENABLE
684
	select ARCH_USES_GETTIMEOFFSET
A
Arnd Bergmann 已提交
685
	select CPU_SA110
686
	select FIQ
687
	select HAVE_IDE
688 689
	select HAVE_PATA_PLATFORM
	select ISA_DMA_API
690
	select NEED_MACH_IO_H
691
	select NEED_MACH_MEMORY_H
692
	select NO_IOPORT_MAP
693
	select VIRT_TO_BUS
L
Linus Torvalds 已提交
694 695 696 697 698 699
	help
	  On the Acorn Risc-PC, Linux can support the internal IDE disk and
	  CD-ROM interface, serial and parallel port, and the floppy drive.

config ARCH_SA1100
	bool "SA1100-based"
700 701 702 703 704
	select ARCH_MTD_XIP
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_SPARSEMEM_ENABLE
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
R
Russell King 已提交
705
	select CPU_FREQ
706
	select CPU_SA1100
707
	select GENERIC_CLOCKEVENTS
708
	select HAVE_IDE
709
	select ISA
710
	select NEED_MACH_MEMORY_H
711
	select SPARSE_IRQ
712 713
	help
	  Support for StrongARM 11x0 based boards.
L
Linus Torvalds 已提交
714

715 716
config ARCH_S3C24XX
	bool "Samsung S3C24XX SoCs"
717
	select ARCH_REQUIRE_GPIOLIB
718
	select ATAGS
719
	select CLKDEV_LOOKUP
720
	select CLKSRC_SAMSUNG_PWM
721
	select GENERIC_CLOCKEVENTS
722
	select GPIO_SAMSUNG
723
	select HAVE_S3C2410_I2C if I2C
724
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
725
	select HAVE_S3C_RTC if RTC_CLASS
726
	select MULTI_IRQ_HANDLER
727
	select NEED_MACH_IO_H
728
	select SAMSUNG_ATAGS
L
Linus Torvalds 已提交
729
	help
730 731 732 733
	  Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
	  and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
	  (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
	  Samsung SMDK2410 development board (and derivatives).
734

B
Ben Dooks 已提交
735 736
config ARCH_S3C64XX
	bool "Samsung S3C64XX"
737
	select ARCH_REQUIRE_GPIOLIB
738
	select ARM_AMBA
739
	select ARM_VIC
740
	select ATAGS
741
	select CLKDEV_LOOKUP
742
	select CLKSRC_SAMSUNG_PWM
743
	select COMMON_CLK_SAMSUNG
744
	select CPU_V6K
745
	select GENERIC_CLOCKEVENTS
746
	select GPIO_SAMSUNG
747 748
	select HAVE_S3C2410_I2C if I2C
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
M
Mark Brown 已提交
749
	select HAVE_TCM
750
	select NO_IOPORT_MAP
751
	select PLAT_SAMSUNG
752
	select PM_GENERIC_DOMAINS if PM
753 754
	select S3C_DEV_NAND
	select S3C_GPIO_TRACK
755
	select SAMSUNG_ATAGS
756
	select SAMSUNG_WAKEMASK
757
	select SAMSUNG_WDT_RESET
B
Ben Dooks 已提交
758 759 760
	help
	  Samsung S3C64XX series based systems

761 762
config ARCH_S5P64X0
	bool "Samsung S5P6440 S5P6450"
763
	select ATAGS
764
	select CLKDEV_LOOKUP
765
	select CLKSRC_SAMSUNG_PWM
766
	select CPU_V6
767
	select GENERIC_CLOCKEVENTS
768
	select GPIO_SAMSUNG
769
	select HAVE_S3C2410_I2C if I2C
770
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
771
	select HAVE_S3C_RTC if RTC_CLASS
772
	select NEED_MACH_GPIO_H
773
	select SAMSUNG_ATAGS
R
Russell King 已提交
774
	select SAMSUNG_WDT_RESET
775
	help
776 777
	  Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
	  SMDK6450.
778

779 780
config ARCH_S5PC100
	bool "Samsung S5PC100"
781
	select ARCH_REQUIRE_GPIOLIB
782
	select ATAGS
783
	select CLKDEV_LOOKUP
784
	select CLKSRC_SAMSUNG_PWM
785
	select CPU_V7
786
	select GENERIC_CLOCKEVENTS
787
	select GPIO_SAMSUNG
788
	select HAVE_S3C2410_I2C if I2C
789
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
790
	select HAVE_S3C_RTC if RTC_CLASS
791
	select NEED_MACH_GPIO_H
792
	select SAMSUNG_ATAGS
R
Russell King 已提交
793
	select SAMSUNG_WDT_RESET
794
	help
795
	  Samsung S5PC100 series based systems
796

797 798
config ARCH_S5PV210
	bool "Samsung S5PV210/S5PC110"
799
	select ARCH_HAS_HOLES_MEMORYMODEL
800
	select ARCH_SPARSEMEM_ENABLE
801
	select ATAGS
802
	select CLKDEV_LOOKUP
803
	select CLKSRC_SAMSUNG_PWM
804
	select CPU_V7
805
	select GENERIC_CLOCKEVENTS
806
	select GPIO_SAMSUNG
807
	select HAVE_S3C2410_I2C if I2C
808
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
809
	select HAVE_S3C_RTC if RTC_CLASS
810
	select NEED_MACH_GPIO_H
811
	select NEED_MACH_MEMORY_H
812
	select SAMSUNG_ATAGS
813 814 815
	help
	  Samsung S5PV210/S5PC110 series based systems

816 817
config ARCH_DAVINCI
	bool "TI DaVinci"
818
	select ARCH_HAS_HOLES_MEMORYMODEL
819
	select ARCH_REQUIRE_GPIOLIB
820
	select CLKDEV_LOOKUP
D
David Brownell 已提交
821
	select GENERIC_ALLOCATOR
822
	select GENERIC_CLOCKEVENTS
R
Russell King 已提交
823
	select GENERIC_IRQ_CHIP
824
	select HAVE_IDE
825
	select TI_PRIV_EDMA
826
	select USE_OF
827
	select ZONE_DMA
828 829 830
	help
	  Support for TI's DaVinci platform.

831 832
config ARCH_OMAP1
	bool "TI OMAP1"
A
Arnd Bergmann 已提交
833
	depends on MMU
834
	select ARCH_HAS_HOLES_MEMORYMODEL
835
	select ARCH_OMAP
836
	select ARCH_REQUIRE_GPIOLIB
837
	select CLKDEV_LOOKUP
838
	select CLKSRC_MMIO
839
	select GENERIC_CLOCKEVENTS
840 841 842 843 844
	select GENERIC_IRQ_CHIP
	select HAVE_IDE
	select IRQ_DOMAIN
	select NEED_MACH_IO_H if PCCARD
	select NEED_MACH_MEMORY_H
845
	help
846
	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
847

L
Linus Torvalds 已提交
848 849
endchoice

R
Rob Herring 已提交
850 851 852 853 854
menu "Multiple platform selection"
	depends on ARCH_MULTIPLATFORM

comment "CPU Core family selection"

A
Arnd Bergmann 已提交
855 856 857 858 859 860
config ARCH_MULTI_V4
	bool "ARMv4 based platforms (FA526)"
	depends on !ARCH_MULTI_V6_V7
	select ARCH_MULTI_V4_V5
	select CPU_FA526

R
Rob Herring 已提交
861 862 863
config ARCH_MULTI_V4T
	bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
	depends on !ARCH_MULTI_V6_V7
864
	select ARCH_MULTI_V4_V5
865 866 867
	select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
		CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
		CPU_ARM925T || CPU_ARM940T)
R
Rob Herring 已提交
868 869 870 871

config ARCH_MULTI_V5
	bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
	depends on !ARCH_MULTI_V6_V7
872
	select ARCH_MULTI_V4_V5
873
	select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \
874 875
		CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
		CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
R
Rob Herring 已提交
876 877 878 879 880

config ARCH_MULTI_V4_V5
	bool

config ARCH_MULTI_V6
881
	bool "ARMv6 based platforms (ARM11)"
R
Rob Herring 已提交
882
	select ARCH_MULTI_V6_V7
883
	select CPU_V6K
R
Rob Herring 已提交
884 885

config ARCH_MULTI_V7
886
	bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
R
Rob Herring 已提交
887 888
	default y
	select ARCH_MULTI_V6_V7
889
	select CPU_V7
890
	select HAVE_SMP
R
Rob Herring 已提交
891 892 893

config ARCH_MULTI_V6_V7
	bool
894
	select MIGHT_HAVE_CACHE_L2X0
R
Rob Herring 已提交
895 896 897 898 899 900 901

config ARCH_MULTI_CPU_AUTO
	def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
	select ARCH_MULTI_V5

endmenu

902 903
config ARCH_VIRT
	bool "Dummy Virtual Machine" if ARCH_MULTI_V7
R
Rob Herring 已提交
904
	select ARM_AMBA
905 906
	select ARM_GIC
	select ARM_PSCI
R
Rob Herring 已提交
907
	select HAVE_ARM_ARCH_TIMER
908

909 910 911 912 913
#
# This is sorted alphabetically by mach-* pathname.  However, plat-*
# Kconfigs may be included either alphabetically (according to the
# plat- suffix) or along side the corresponding mach-* source.
#
914 915
source "arch/arm/mach-mvebu/Kconfig"

916 917
source "arch/arm/mach-at91/Kconfig"

918 919
source "arch/arm/mach-axxia/Kconfig"

920 921
source "arch/arm/mach-bcm/Kconfig"

922 923
source "arch/arm/mach-berlin/Kconfig"

L
Linus Torvalds 已提交
924 925
source "arch/arm/mach-clps711x/Kconfig"

926 927
source "arch/arm/mach-cns3xxx/Kconfig"

928 929 930 931
source "arch/arm/mach-davinci/Kconfig"

source "arch/arm/mach-dove/Kconfig"

932 933
source "arch/arm/mach-ep93xx/Kconfig"

L
Linus Torvalds 已提交
934 935
source "arch/arm/mach-footbridge/Kconfig"

936 937
source "arch/arm/mach-gemini/Kconfig"

R
Rob Herring 已提交
938 939
source "arch/arm/mach-highbank/Kconfig"

H
Haojian Zhuang 已提交
940 941
source "arch/arm/mach-hisi/Kconfig"

L
Linus Torvalds 已提交
942 943
source "arch/arm/mach-integrator/Kconfig"

944 945 946
source "arch/arm/mach-iop32x/Kconfig"

source "arch/arm/mach-iop33x/Kconfig"
L
Linus Torvalds 已提交
947

948 949
source "arch/arm/mach-iop13xx/Kconfig"

L
Linus Torvalds 已提交
950 951
source "arch/arm/mach-ixp4xx/Kconfig"

952 953
source "arch/arm/mach-keystone/Kconfig"

954 955 956 957 958 959
source "arch/arm/mach-kirkwood/Kconfig"

source "arch/arm/mach-ks8695/Kconfig"

source "arch/arm/mach-msm/Kconfig"

960 961
source "arch/arm/mach-moxart/Kconfig"

962 963
source "arch/arm/mach-mv78xx0/Kconfig"

S
Shawn Guo 已提交
964
source "arch/arm/mach-imx/Kconfig"
L
Linus Torvalds 已提交
965

966 967
source "arch/arm/mach-mxs/Kconfig"

968
source "arch/arm/mach-netx/Kconfig"
969

970 971
source "arch/arm/mach-nomadik/Kconfig"

D
Daniel Tang 已提交
972 973
source "arch/arm/mach-nspire/Kconfig"

974 975 976
source "arch/arm/plat-omap/Kconfig"

source "arch/arm/mach-omap1/Kconfig"
L
Linus Torvalds 已提交
977

978 979
source "arch/arm/mach-omap2/Kconfig"

980
source "arch/arm/mach-orion5x/Kconfig"
981

R
Rob Herring 已提交
982 983
source "arch/arm/mach-picoxcell/Kconfig"

984 985
source "arch/arm/mach-pxa/Kconfig"
source "arch/arm/plat-pxa/Kconfig"
986

987 988
source "arch/arm/mach-mmp/Kconfig"

989 990
source "arch/arm/mach-qcom/Kconfig"

991 992
source "arch/arm/mach-realview/Kconfig"

993 994
source "arch/arm/mach-rockchip/Kconfig"

995
source "arch/arm/mach-sa1100/Kconfig"
996

R
Rob Herring 已提交
997 998
source "arch/arm/mach-socfpga/Kconfig"

999
source "arch/arm/mach-spear/Kconfig"
1000

1001 1002
source "arch/arm/mach-sti/Kconfig"

1003
source "arch/arm/mach-s3c24xx/Kconfig"
L
Linus Torvalds 已提交
1004

1005
source "arch/arm/mach-s3c64xx/Kconfig"
B
Ben Dooks 已提交
1006

1007
source "arch/arm/mach-s5p64x0/Kconfig"
1008

1009 1010
source "arch/arm/mach-s5pc100/Kconfig"

1011 1012
source "arch/arm/mach-s5pv210/Kconfig"

1013
source "arch/arm/mach-exynos/Kconfig"
1014
source "arch/arm/plat-samsung/Kconfig"
1015

1016
source "arch/arm/mach-shmobile/Kconfig"
1017

1018 1019
source "arch/arm/mach-sunxi/Kconfig"

1020 1021
source "arch/arm/mach-prima2/Kconfig"

1022 1023
source "arch/arm/mach-tegra/Kconfig"

1024
source "arch/arm/mach-u300/Kconfig"
L
Linus Torvalds 已提交
1025

1026
source "arch/arm/mach-ux500/Kconfig"
L
Linus Torvalds 已提交
1027 1028 1029

source "arch/arm/mach-versatile/Kconfig"

1030
source "arch/arm/mach-vexpress/Kconfig"
1031
source "arch/arm/plat-versatile/Kconfig"
1032

1033 1034
source "arch/arm/mach-vt8500/Kconfig"

1035 1036
source "arch/arm/mach-w90x900/Kconfig"

1037 1038
source "arch/arm/mach-zynq/Kconfig"

L
Linus Torvalds 已提交
1039 1040 1041 1042
# Definitions to make life easier
config ARCH_ACORN
	bool

1043 1044
config PLAT_IOP
	bool
M
Mikael Pettersson 已提交
1045
	select GENERIC_CLOCKEVENTS
1046

L
Lennert Buytenhek 已提交
1047 1048
config PLAT_ORION
	bool
1049
	select CLKSRC_MMIO
1050
	select COMMON_CLK
R
Russell King 已提交
1051
	select GENERIC_IRQ_CHIP
1052
	select IRQ_DOMAIN
L
Lennert Buytenhek 已提交
1053

1054 1055 1056 1057
config PLAT_ORION_LEGACY
	bool
	select PLAT_ORION

1058 1059 1060
config PLAT_PXA
	bool

1061 1062 1063
config PLAT_VERSATILE
	bool

1064 1065
config ARM_TIMER_SP804
	bool
1066
	select CLKSRC_MMIO
1067
	select CLKSRC_OF if OF
1068

1069 1070
source "arch/arm/firmware/Kconfig"

L
Linus Torvalds 已提交
1071 1072
source arch/arm/mm/Kconfig

1073
config IWMMXT
1074 1075 1076
	bool "Enable iWMMXt support"
	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B
	default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B
1077 1078 1079 1080
	help
	  Enable support for iWMMXt context switching at run time if
	  running on a CPU that supports it.

1081 1082 1083 1084 1085
config MULTI_IRQ_HANDLER
	bool
	help
	  Allow each machine to specify it's own IRQ handler at run time.

1086 1087 1088 1089
if !MMU
source "arch/arm/Kconfig-nommu"
endif

1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103
config PJ4B_ERRATA_4742
	bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
	depends on CPU_PJ4B && MACH_ARMADA_370
	default y
	help
	  When coming out of either a Wait for Interrupt (WFI) or a Wait for
	  Event (WFE) IDLE states, a specific timing sensitivity exists between
	  the retiring WFI/WFE instructions and the newly issued subsequent
	  instructions.  This sensitivity can result in a CPU hang scenario.
	  Workaround:
	  The software must insert either a Data Synchronization Barrier (DSB)
	  or Data Memory Barrier (DMB) command immediately after the WFI/WFE
	  instruction

1104 1105 1106 1107 1108 1109 1110 1111 1112
config ARM_ERRATA_326103
	bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
	depends on CPU_V6
	help
	  Executing a SWP instruction to read-only memory does not set bit 11
	  of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
	  treat the access as a read, preventing a COW from occurring and
	  causing the faulting task to livelock.

1113 1114
config ARM_ERRATA_411920
	bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1115
	depends on CPU_V6 || CPU_V6K
1116 1117 1118 1119 1120 1121
	help
	  Invalidation of the Instruction Cache operation can
	  fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
	  It does not affect the MPCore. This option enables the ARM Ltd.
	  recommended workaround.

1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137
config ARM_ERRATA_430973
	bool "ARM errata: Stale prediction on replaced interworking branch"
	depends on CPU_V7
	help
	  This option enables the workaround for the 430973 Cortex-A8
	  (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
	  interworking branch is replaced with another code sequence at the
	  same virtual address, whether due to self-modifying code or virtual
	  to physical address re-mapping, Cortex-A8 does not recover from the
	  stale interworking branch prediction. This results in Cortex-A8
	  executing the new code sequence in the incorrect ARM or Thumb state.
	  The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
	  and also flushes the branch target cache at every context switch.
	  Note that setting specific bits in the ACTLR register may not be
	  available in non-secure mode.

1138 1139 1140
config ARM_ERRATA_458693
	bool "ARM errata: Processor deadlock when a false hazard is created"
	depends on CPU_V7
1141
	depends on !ARCH_MULTIPLATFORM
1142 1143 1144 1145 1146 1147 1148 1149 1150 1151
	help
	  This option enables the workaround for the 458693 Cortex-A8 (r2p0)
	  erratum. For very specific sequences of memory operations, it is
	  possible for a hazard condition intended for a cache line to instead
	  be incorrectly associated with a different cache line. This false
	  hazard might then cause a processor deadlock. The workaround enables
	  the L1 caching of the NEON accesses and disables the PLD instruction
	  in the ACTLR register. Note that setting specific bits in the ACTLR
	  register may not be available in non-secure mode.

1152 1153 1154
config ARM_ERRATA_460075
	bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
	depends on CPU_V7
1155
	depends on !ARCH_MULTIPLATFORM
1156 1157 1158 1159 1160 1161 1162 1163 1164
	help
	  This option enables the workaround for the 460075 Cortex-A8 (r2p0)
	  erratum. Any asynchronous access to the L2 cache may encounter a
	  situation in which recent store transactions to the L2 cache are lost
	  and overwritten with stale memory contents from external memory. The
	  workaround disables the write-allocate mode for the L2 cache via the
	  ACTLR register. Note that setting specific bits in the ACTLR register
	  may not be available in non-secure mode.

1165 1166 1167
config ARM_ERRATA_742230
	bool "ARM errata: DMB operation may be faulty"
	depends on CPU_V7 && SMP
1168
	depends on !ARCH_MULTIPLATFORM
1169 1170 1171 1172 1173 1174 1175 1176 1177
	help
	  This option enables the workaround for the 742230 Cortex-A9
	  (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
	  between two write operations may not ensure the correct visibility
	  ordering of the two writes. This workaround sets a specific bit in
	  the diagnostic register of the Cortex-A9 which causes the DMB
	  instruction to behave as a DSB, ensuring the correct behaviour of
	  the two writes.

1178 1179 1180
config ARM_ERRATA_742231
	bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
	depends on CPU_V7 && SMP
1181
	depends on !ARCH_MULTIPLATFORM
1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192
	help
	  This option enables the workaround for the 742231 Cortex-A9
	  (r2p0..r2p2) erratum. Under certain conditions, specific to the
	  Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
	  accessing some data located in the same cache line, may get corrupted
	  data due to bad handling of the address hazard when the line gets
	  replaced from one of the CPUs at the same time as another CPU is
	  accessing it. This workaround sets specific bits in the diagnostic
	  register of the Cortex-A9 which reduces the linefill issuing
	  capabilities of the processor.

1193 1194 1195 1196 1197 1198 1199 1200 1201 1202
config ARM_ERRATA_643719
	bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
	depends on CPU_V7 && SMP
	help
	  This option enables the workaround for the 643719 Cortex-A9 (prior to
	  r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
	  register returns zero when it should return one. The workaround
	  corrects this value, ensuring cache maintenance operations which use
	  it behave as intended and avoiding data corruption.

1203 1204
config ARM_ERRATA_720789
	bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1205
	depends on CPU_V7
1206 1207 1208 1209 1210 1211 1212 1213
	help
	  This option enables the workaround for the 720789 Cortex-A9 (prior to
	  r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
	  broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
	  As a consequence of this erratum, some TLB entries which should be
	  invalidated are not, resulting in an incoherency in the system page
	  tables. The workaround changes the TLB flushing routines to invalidate
	  entries regardless of the ASID.
1214 1215 1216 1217

config ARM_ERRATA_743622
	bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
	depends on CPU_V7
1218
	depends on !ARCH_MULTIPLATFORM
1219 1220
	help
	  This option enables the workaround for the 743622 Cortex-A9
1221
	  (r2p*) erratum. Under very rare conditions, a faulty
1222 1223 1224 1225 1226 1227 1228
	  optimisation in the Cortex-A9 Store Buffer may lead to data
	  corruption. This workaround sets a specific bit in the diagnostic
	  register of the Cortex-A9 which disables the Store Buffer
	  optimisation, preventing the defect from occurring. This has no
	  visible impact on the overall performance or power consumption of the
	  processor.

1229 1230
config ARM_ERRATA_751472
	bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1231
	depends on CPU_V7
1232
	depends on !ARCH_MULTIPLATFORM
1233 1234 1235 1236 1237 1238 1239
	help
	  This option enables the workaround for the 751472 Cortex-A9 (prior
	  to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
	  completion of a following broadcasted operation if the second
	  operation is received by a CPU before the ICIALLUIS has completed,
	  potentially leading to corrupted entries in the cache or TLB.

1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250
config ARM_ERRATA_754322
	bool "ARM errata: possible faulty MMU translations following an ASID switch"
	depends on CPU_V7
	help
	  This option enables the workaround for the 754322 Cortex-A9 (r2p*,
	  r3p*) erratum. A speculative memory access may cause a page table walk
	  which starts prior to an ASID switch but completes afterwards. This
	  can populate the micro-TLB with a stale entry which may be hit with
	  the new ASID. This workaround places two dsb instructions in the mm
	  switching code so that no page table walks can cross the ASID switch.

1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261
config ARM_ERRATA_754327
	bool "ARM errata: no automatic Store Buffer drain"
	depends on CPU_V7 && SMP
	help
	  This option enables the workaround for the 754327 Cortex-A9 (prior to
	  r2p0) erratum. The Store Buffer does not have any automatic draining
	  mechanism and therefore a livelock may occur if an external agent
	  continuously polls a memory location waiting to observe an update.
	  This workaround defines cpu_relax() as smp_mb(), preventing correctly
	  written polling loops from denying visibility of updates to memory.

1262 1263
config ARM_ERRATA_364296
	bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
1264
	depends on CPU_V6
1265 1266 1267 1268 1269 1270 1271 1272 1273
	help
	  This options enables the workaround for the 364296 ARM1136
	  r0p2 erratum (possible cache data corruption with
	  hit-under-miss enabled). It sets the undocumented bit 31 in
	  the auxiliary control register and the FI bit in the control
	  register, thus disabling hit-under-miss without putting the
	  processor into full low interrupt latency mode. ARM11MPCore
	  is not affected.

1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287
config ARM_ERRATA_764369
	bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
	depends on CPU_V7 && SMP
	help
	  This option enables the workaround for erratum 764369
	  affecting Cortex-A9 MPCore with two or more processors (all
	  current revisions). Under certain timing circumstances, a data
	  cache line maintenance operation by MVA targeting an Inner
	  Shareable memory region may fail to proceed up to either the
	  Point of Coherency or to the Point of Unification of the
	  system. This workaround adds a DSB instruction before the
	  relevant cache maintenance functions and sets a specific bit
	  in the diagnostic control register of the SCU.

1288 1289 1290 1291 1292 1293 1294 1295 1296 1297
config ARM_ERRATA_775420
       bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
       depends on CPU_V7
       help
	 This option enables the workaround for the 775420 Cortex-A9 (r2p2,
	 r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
	 operation aborts with MMU exception, it might cause the processor
	 to deadlock. This workaround puts DSB before executing ISB if
	 an abort may occur on cache maintenance.

1298 1299 1300 1301 1302 1303 1304 1305 1306 1307
config ARM_ERRATA_798181
	bool "ARM errata: TLBI/DSB failure on Cortex-A15"
	depends on CPU_V7 && SMP
	help
	  On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
	  adequately shooting down all use of the old entries. This
	  option enables the Linux kernel workaround for this erratum
	  which sends an IPI to the CPUs that are running the same ASID
	  as the one being invalidated.

1308 1309 1310 1311 1312 1313 1314 1315 1316
config ARM_ERRATA_773022
	bool "ARM errata: incorrect instructions may be executed from loop buffer"
	depends on CPU_V7
	help
	  This option enables the workaround for the 773022 Cortex-A15
	  (up to r0p4) erratum. In certain rare sequences of code, the
	  loop buffer may deliver incorrect instructions. This
	  workaround disables the loop buffer to avoid the erratum.

L
Linus Torvalds 已提交
1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334
endmenu

source "arch/arm/common/Kconfig"

menu "Bus support"

config ARM_AMBA
	bool

config ISA
	bool
	help
	  Find out whether you have ISA slots on your motherboard.  ISA is the
	  name of a bus system, i.e. the way the CPU talks to the other stuff
	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
	  newer boards don't support it.  If you have ISA, say Y, otherwise N.

1335
# Select ISA DMA controller support
L
Linus Torvalds 已提交
1336 1337
config ISA_DMA
	bool
1338
	select ISA_DMA_API
L
Linus Torvalds 已提交
1339

1340
# Select ISA DMA interface
A
Al Viro 已提交
1341 1342 1343
config ISA_DMA_API
	bool

L
Linus Torvalds 已提交
1344
config PCI
1345
	bool "PCI support" if MIGHT_HAVE_PCI
L
Linus Torvalds 已提交
1346 1347 1348 1349 1350 1351
	help
	  Find out whether you have a PCI motherboard. PCI is the name of a
	  bus system, i.e. the way the CPU talks to the other stuff inside
	  your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
	  VESA. If you have PCI, say Y, otherwise N.

1352 1353 1354 1355
config PCI_DOMAINS
	bool
	depends on PCI

1356 1357 1358 1359 1360 1361
config PCI_NANOENGINE
	bool "BSE nanoEngine PCI support"
	depends on SA1100_NANOENGINE
	help
	  Enable PCI on the BSE nanoEngine board.

1362 1363 1364
config PCI_SYSCALL
	def_bool PCI

M
Mike Rapoport 已提交
1365 1366 1367 1368 1369 1370
config PCI_HOST_ITE8152
	bool
	depends on PCI && MACH_ARMCORE
	default y
	select DMABOUNCE

L
Linus Torvalds 已提交
1371
source "drivers/pci/Kconfig"
1372
source "drivers/pci/pcie/Kconfig"
L
Linus Torvalds 已提交
1373 1374 1375 1376 1377 1378 1379

source "drivers/pcmcia/Kconfig"

endmenu

menu "Kernel Features"

1380 1381 1382 1383 1384 1385 1386 1387 1388
config HAVE_SMP
	bool
	help
	  This option should be selected by machines which have an SMP-
	  capable CPU.

	  The only effect of this option is to make the SMP-related
	  options available to the user for configuration.

L
Linus Torvalds 已提交
1389
config SMP
1390
	bool "Symmetric Multi-Processing"
1391
	depends on CPU_V6K || CPU_V7
1392
	depends on GENERIC_CLOCKEVENTS
1393
	depends on HAVE_SMP
1394
	depends on MMU || ARM_MPU
L
Linus Torvalds 已提交
1395 1396
	help
	  This enables support for systems with more than one CPU. If you have
1397 1398
	  a system with only one CPU, say N. If you have a system with more
	  than one CPU, say Y.
L
Linus Torvalds 已提交
1399

1400
	  If you say N here, the kernel will run on uni- and multiprocessor
L
Linus Torvalds 已提交
1401
	  machines, but will use only one CPU of a multiprocessor machine. If
1402 1403 1404
	  you say Y here, the kernel will run on many, but not all,
	  uniprocessor machines. On a uniprocessor machine, the kernel
	  will run faster if you say N here.
L
Linus Torvalds 已提交
1405

P
Paul Bolle 已提交
1406
	  See also <file:Documentation/x86/i386/IO-APIC.txt>,
L
Linus Torvalds 已提交
1407
	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1408
	  <http://tldp.org/HOWTO/SMP-HOWTO.html>.
L
Linus Torvalds 已提交
1409 1410 1411

	  If you don't know what to do here, say N.

1412 1413
config SMP_ON_UP
	bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1414
	depends on SMP && !XIP_KERNEL && MMU
1415 1416 1417 1418 1419 1420 1421 1422 1423
	default y
	help
	  SMP kernels contain instructions which fail on non-SMP processors.
	  Enabling this option allows the kernel to modify itself to make
	  these instructions safe.  Disabling it allows about 1K of space
	  savings.

	  If you don't know what to do here, say Y.

1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448
config ARM_CPU_TOPOLOGY
	bool "Support cpu topology definition"
	depends on SMP && CPU_V7
	default y
	help
	  Support ARM cpu topology definition. The MPIDR register defines
	  affinity between processors which is then used to describe the cpu
	  topology of an ARM System.

config SCHED_MC
	bool "Multi-core scheduler support"
	depends on ARM_CPU_TOPOLOGY
	help
	  Multi-core scheduler support improves the CPU scheduler's decision
	  making when dealing with multi-core CPU chips at a cost of slightly
	  increased overhead in some places. If unsure say N here.

config SCHED_SMT
	bool "SMT scheduler support"
	depends on ARM_CPU_TOPOLOGY
	help
	  Improves the CPU scheduler's decision making when dealing with
	  MultiThreading at a cost of slightly increased overhead in some
	  places. If unsure say N here.

1449 1450 1451 1452 1453
config HAVE_ARM_SCU
	bool
	help
	  This option enables support for the ARM system coherency unit

1454
config HAVE_ARM_ARCH_TIMER
1455 1456
	bool "Architected timer support"
	depends on CPU_V7
1457
	select ARM_ARCH_TIMER
1458
	select GENERIC_CLOCKEVENTS
1459 1460 1461
	help
	  This option enables support for the ARM architected timer

1462 1463 1464
config HAVE_ARM_TWD
	bool
	depends on SMP
1465
	select CLKSRC_OF if OF
1466 1467 1468
	help
	  This options enables support for the ARM timer and watchdog unit

1469 1470 1471 1472 1473 1474 1475 1476
config MCPM
	bool "Multi-Cluster Power Management"
	depends on CPU_V7 && SMP
	help
	  This option provides the common power management infrastructure
	  for (multi-)cluster based systems, such as big.LITTLE based
	  systems.

N
Nicolas Pitre 已提交
1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488
config BIG_LITTLE
	bool "big.LITTLE support (Experimental)"
	depends on CPU_V7 && SMP
	select MCPM
	help
	  This option enables support selections for the big.LITTLE
	  system architecture.

config BL_SWITCHER
	bool "big.LITTLE switcher support"
	depends on BIG_LITTLE && MCPM && HOTPLUG_CPU
	select ARM_CPU_SUSPEND
1489
	select CPU_PM
N
Nicolas Pitre 已提交
1490 1491 1492 1493 1494
	help
	  The big.LITTLE "switcher" provides the core functionality to
	  transparently handle transition between a cluster of A15's
	  and a cluster of A7's in a big.LITTLE system.

1495 1496 1497 1498 1499 1500 1501 1502
config BL_SWITCHER_DUMMY_IF
	tristate "Simple big.LITTLE switcher user interface"
	depends on BL_SWITCHER && DEBUG_KERNEL
	help
	  This is a simple and dummy char dev interface to control
	  the big.LITTLE switcher core code.  It is meant for
	  debugging purposes only.

1503 1504
choice
	prompt "Memory split"
1505
	depends on MMU
1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522
	default VMSPLIT_3G
	help
	  Select the desired split between kernel and user memory.

	  If you are not absolutely sure what you are doing, leave this
	  option alone!

	config VMSPLIT_3G
		bool "3G/1G user/kernel split"
	config VMSPLIT_2G
		bool "2G/2G user/kernel split"
	config VMSPLIT_1G
		bool "1G/3G user/kernel split"
endchoice

config PAGE_OFFSET
	hex
1523
	default PHYS_OFFSET if !MMU
1524 1525 1526 1527
	default 0x40000000 if VMSPLIT_1G
	default 0x80000000 if VMSPLIT_2G
	default 0xC0000000

L
Linus Torvalds 已提交
1528 1529 1530 1531 1532 1533
config NR_CPUS
	int "Maximum number of CPUs (2-32)"
	range 2 32
	depends on SMP
	default "4"

1534
config HOTPLUG_CPU
1535
	bool "Support for hot-pluggable CPUs"
1536
	depends on SMP
1537 1538 1539 1540
	help
	  Say Y here to experiment with turning CPUs off and on.  CPUs
	  can be controlled through /sys/devices/system/cpu.

1541 1542 1543 1544 1545 1546 1547 1548 1549 1550
config ARM_PSCI
	bool "Support for the ARM Power State Coordination Interface (PSCI)"
	depends on CPU_V7
	help
	  Say Y here if you want Linux to communicate with system firmware
	  implementing the PSCI specification for CPU-centric power
	  management operations described in ARM document number ARM DEN
	  0022A ("Power State Coordination Interface System Software on
	  ARM processors").

1551 1552 1553
# The GPIO number here must be sorted by descending number. In case of
# a multiplatform kernel, we just want the highest value required by the
# selected platforms.
1554 1555
config ARCH_NR_GPIO
	int
1556
	default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
1557
	default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX
1558
	default 416 if ARCH_SUNXI
1559
	default 392 if ARCH_U8500
1560
	default 352 if ARCH_VT8500
1561
	default 264 if MACH_H4700
1562 1563 1564 1565 1566 1567
	default 0
	help
	  Maximum number of GPIOs in the system.

	  If unsure, leave the default value.

1568
source kernel/Kconfig.preempt
L
Linus Torvalds 已提交
1569

R
Russell King 已提交
1570
config HZ_FIXED
1571
	int
1572
	default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
K
Kukjin Kim 已提交
1573
		ARCH_S5PV210 || ARCH_EXYNOS4
1574
	default AT91_TIMER_HZ if ARCH_AT91
1575
	default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE_LEGACY
R
Russell King 已提交
1576
	default 0
R
Russell King 已提交
1577 1578

choice
R
Russell King 已提交
1579
	depends on HZ_FIXED = 0
R
Russell King 已提交
1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603
	prompt "Timer frequency"

config HZ_100
	bool "100 Hz"

config HZ_200
	bool "200 Hz"

config HZ_250
	bool "250 Hz"

config HZ_300
	bool "300 Hz"

config HZ_500
	bool "500 Hz"

config HZ_1000
	bool "1000 Hz"

endchoice

config HZ
	int
R
Russell King 已提交
1604
	default HZ_FIXED if HZ_FIXED != 0
R
Russell King 已提交
1605 1606 1607 1608 1609 1610 1611 1612 1613
	default 100 if HZ_100
	default 200 if HZ_200
	default 250 if HZ_250
	default 300 if HZ_300
	default 500 if HZ_500
	default 1000

config SCHED_HRTICK
	def_bool HIGH_RES_TIMERS
1614

1615
config THUMB2_KERNEL
1616
	bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
1617
	depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
1618
	default y if CPU_THUMBONLY
1619 1620
	select AEABI
	select ARM_ASM_UNIFIED
1621
	select ARM_UNWIND
1622 1623 1624 1625 1626 1627 1628
	help
	  By enabling this option, the kernel will be compiled in
	  Thumb-2 mode. A compiler/assembler that understand the unified
	  ARM-Thumb syntax is needed.

	  If unsure, say N.

1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659
config THUMB2_AVOID_R_ARM_THM_JUMP11
	bool "Work around buggy Thumb-2 short branch relocations in gas"
	depends on THUMB2_KERNEL && MODULES
	default y
	help
	  Various binutils versions can resolve Thumb-2 branches to
	  locally-defined, preemptible global symbols as short-range "b.n"
	  branch instructions.

	  This is a problem, because there's no guarantee the final
	  destination of the symbol, or any candidate locations for a
	  trampoline, are within range of the branch.  For this reason, the
	  kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
	  relocation in modules at all, and it makes little sense to add
	  support.

	  The symptom is that the kernel fails with an "unsupported
	  relocation" error when loading some modules.

	  Until fixed tools are available, passing
	  -fno-optimize-sibling-calls to gcc should prevent gcc generating
	  code which hits this problem, at the cost of a bit of extra runtime
	  stack usage in some cases.

	  The problem is described in more detail at:
	      https://bugs.launchpad.net/binutils-linaro/+bug/725126

	  Only Thumb-2 kernels are affected.

	  Unless you are sure your tools don't have this problem, say Y.

1660 1661 1662
config ARM_ASM_UNIFIED
	bool

1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677
config AEABI
	bool "Use the ARM EABI to compile the kernel"
	help
	  This option allows for the kernel to be compiled using the latest
	  ARM ABI (aka EABI).  This is only useful if you are using a user
	  space environment that is also compiled with EABI.

	  Since there are major incompatibilities between the legacy ABI and
	  EABI, especially with regard to structure member alignment, this
	  option also changes the kernel syscall calling convention to
	  disambiguate both ABIs and allow for backward compatibility support
	  (selected with CONFIG_OABI_COMPAT).

	  To use this you need GCC version 4.0.0 or later.

1678
config OABI_COMPAT
1679
	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1680
	depends on AEABI && !THUMB2_KERNEL
1681 1682 1683 1684 1685 1686 1687
	help
	  This option preserves the old syscall interface along with the
	  new (ARM EABI) one. It also provides a compatibility layer to
	  intercept syscalls that have structure arguments which layout
	  in memory differs between the legacy ABI and the new ARM EABI
	  (only for non "thumb" binaries). This option adds a tiny
	  overhead to all syscalls and produces a slightly larger kernel.
1688 1689 1690 1691 1692

	  The seccomp filter system will not be available when this is
	  selected, since there is no way yet to sensibly distinguish
	  between calling conventions during filtering.

1693 1694 1695 1696
	  If you know you'll be using only pure EABI user space then you
	  can say N here. If this option is not selected and you attempt
	  to execute a legacy ABI binary then the result will be
	  UNPREDICTABLE (in fact it can be predicted that it won't work
K
Kees Cook 已提交
1697
	  at all). If in doubt say N.
1698

1699
config ARCH_HAS_HOLES_MEMORYMODEL
1700 1701
	bool

1702 1703 1704
config ARCH_SPARSEMEM_ENABLE
	bool

1705 1706 1707
config ARCH_SPARSEMEM_DEFAULT
	def_bool ARCH_SPARSEMEM_ENABLE

1708
config ARCH_SELECT_MEMORY_MODEL
R
Russell King 已提交
1709
	def_bool ARCH_SPARSEMEM_ENABLE
Y
Yasunori Goto 已提交
1710

1711 1712 1713
config HAVE_ARCH_PFN_VALID
	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM

N
Nicolas Pitre 已提交
1714
config HIGHMEM
1715 1716
	bool "High Memory Support"
	depends on MMU
N
Nicolas Pitre 已提交
1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730
	help
	  The address space of ARM processors is only 4 Gigabytes large
	  and it has to accommodate user address space, kernel address
	  space as well as some memory mapped IO. That means that, if you
	  have a large amount of physical memory and/or IO, not all of the
	  memory can be "permanently mapped" by the kernel. The physical
	  memory that is not permanently mapped is called "high memory".

	  Depending on the selected kernel/user memory split, minimum
	  vmalloc space and actual amount of RAM, you may not need this
	  option which should result in a slightly faster kernel.

	  If unsure, say n.

R
Russell King 已提交
1731 1732 1733 1734
config HIGHPTE
	bool "Allocate 2nd-level pagetables from highmem"
	depends on HIGHMEM

1735 1736
config HW_PERF_EVENTS
	bool "Enable hardware performance counter support for perf events"
1737
	depends on PERF_EVENTS
1738 1739 1740 1741 1742
	default y
	help
	  Enable hardware performance counter support for perf events. If
	  disabled, perf events will use software events only.

1743 1744 1745 1746
config SYS_SUPPORTS_HUGETLBFS
       def_bool y
       depends on ARM_LPAE

1747 1748 1749 1750
config HAVE_ARCH_TRANSPARENT_HUGEPAGE
       def_bool y
       depends on ARM_LPAE

1751 1752 1753
config ARCH_WANT_GENERAL_HUGETLB
	def_bool y

1754 1755
source "mm/Kconfig"

1756
config FORCE_MAX_ZONEORDER
1757 1758
	int "Maximum zone order" if ARCH_SHMOBILE_LEGACY
	range 11 64 if ARCH_SHMOBILE_LEGACY
1759
	default "12" if SOC_AM33XX
1760
	default "9" if SA1111 || ARCH_EFM32
1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772
	default "11"
	help
	  The kernel memory allocator divides physically contiguous memory
	  blocks into "zones", where each zone is a power of two number of
	  pages.  This option selects the largest power of two that the kernel
	  keeps in the memory allocator.  If you need to allocate very large
	  blocks of physically contiguous memory, then you may need to
	  increase this value.

	  This config option is actually maximum order plus one. For example,
	  a value of 11 means that the largest free memory block is 2^10 pages.

L
Linus Torvalds 已提交
1773 1774
config ALIGNMENT_TRAP
	bool
1775
	depends on CPU_CP15_MMU
L
Linus Torvalds 已提交
1776
	default y if !ARCH_EBSA110
1777
	select HAVE_PROC_CPU if PROC_FS
L
Linus Torvalds 已提交
1778
	help
1779
	  ARM processors cannot fetch/store information which is not
L
Linus Torvalds 已提交
1780 1781 1782 1783 1784 1785 1786
	  naturally aligned on the bus, i.e., a 4 byte fetch must start at an
	  address divisible by 4. On 32-bit ARM processors, these non-aligned
	  fetch/store instructions will be emulated in software if you say
	  here, which has a severe performance impact. This is necessary for
	  correct operation of some network protocols. With an IP-only
	  configuration it is safe to say N, otherwise say Y.

1787
config UACCESS_WITH_MEMCPY
1788 1789
	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
	depends on MMU
1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802
	default y if CPU_FEROCEON
	help
	  Implement faster copy_to_user and clear_user methods for CPU
	  cores where a 8-word STM instruction give significantly higher
	  memory write throughput than a sequence of individual 32bit stores.

	  A possible side effect is a slight increase in scheduling latency
	  between threads sharing the same address space if they invoke
	  such copy operations with large buffers.

	  However, if the CPU data cache is using a write-allocate mode,
	  this option is unlikely to provide any performance gain.

N
Nicolas Pitre 已提交
1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816
config SECCOMP
	bool
	prompt "Enable seccomp to safely compute untrusted bytecode"
	---help---
	  This kernel feature is useful for number crunching applications
	  that may need to compute untrusted bytecode during their
	  execution. By using pipes or other transports made available to
	  the process as file descriptors supporting the read/write
	  syscalls, it's possible to isolate those applications in
	  their own address space using seccomp. Once seccomp is
	  enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
	  and the task is only allowed to execute a few safe syscalls
	  defined by each seccomp mode.

S
Stefano Stabellini 已提交
1817 1818 1819 1820 1821 1822
config SWIOTLB
	def_bool y

config IOMMU_HELPER
	def_bool SWIOTLB

1823 1824 1825 1826 1827 1828
config XEN_DOM0
	def_bool y
	depends on XEN

config XEN
	bool "Xen guest support on ARM (EXPERIMENTAL)"
1829
	depends on ARM && AEABI && OF
1830
	depends on CPU_V7 && !CPU_V6
1831
	depends on !GENERIC_ATOMIC64
1832
	depends on MMU
1833
	select ARCH_DMA_ADDR_T_64BIT
1834
	select ARM_PSCI
1835
	select SWIOTLB_XEN
1836 1837 1838
	help
	  Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.

L
Linus Torvalds 已提交
1839 1840 1841 1842
endmenu

menu "Boot options"

G
Grant Likely 已提交
1843 1844
config USE_OF
	bool "Flattened Device Tree support"
1845
	select IRQ_DOMAIN
G
Grant Likely 已提交
1846 1847
	select OF
	select OF_EARLY_FLATTREE
1848
	select OF_RESERVED_MEM
G
Grant Likely 已提交
1849 1850 1851
	help
	  Include support for flattened device tree machine descriptions.

1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868
config ATAGS
	bool "Support for the traditional ATAGS boot data passing" if USE_OF
	default y
	help
	  This is the traditional way of passing data to the kernel at boot
	  time. If you are solely relying on the flattened device tree (or
	  the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
	  to remove ATAGS support from your kernel binary.  If unsure,
	  leave this to y.

config DEPRECATED_PARAM_STRUCT
	bool "Provide old way to pass kernel parameters"
	depends on ATAGS
	help
	  This was deprecated in 2001 and announced to live on for 5 years.
	  Some old boot loaders still use this way.

L
Linus Torvalds 已提交
1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885
# Compressed boot loader in ROM.  Yes, we really want to ask about
# TEXT and BSS so we preserve their values in the config files.
config ZBOOT_ROM_TEXT
	hex "Compressed ROM boot loader base address"
	default "0"
	help
	  The physical address at which the ROM-able zImage is to be
	  placed in the target.  Platforms which normally make use of
	  ROM-able zImage formats normally set this to a suitable
	  value in their defconfig file.

	  If ZBOOT_ROM is not enabled, this has no effect.

config ZBOOT_ROM_BSS
	hex "Compressed ROM boot loader BSS address"
	default "0"
	help
1886 1887 1888 1889 1890 1891
	  The base address of an area of read/write memory in the target
	  for the ROM-able zImage which must be available while the
	  decompressor is running. It must be large enough to hold the
	  entire decompressed kernel plus an additional 128 KiB.
	  Platforms which normally make use of ROM-able zImage formats
	  normally set this to a suitable value in their defconfig file.
L
Linus Torvalds 已提交
1892 1893 1894 1895 1896 1897

	  If ZBOOT_ROM is not enabled, this has no effect.

config ZBOOT_ROM
	bool "Compressed boot loader in ROM/flash"
	depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1898
	depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR
L
Linus Torvalds 已提交
1899 1900 1901 1902
	help
	  Say Y here if you intend to execute your compressed kernel image
	  (zImage) directly from ROM or flash.  If unsure, say N.

1903 1904
choice
	prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1905
	depends on ZBOOT_ROM && ARCH_SH7372
1906 1907 1908
	default ZBOOT_ROM_NONE
	help
	  Include experimental SD/MMC loading code in the ROM-able zImage.
M
Masanari Iida 已提交
1909
	  With this enabled it is possible to write the ROM-able zImage
1910 1911
	  kernel image to an MMC or SD card and boot the kernel straight
	  from the reset vector. At reset the processor Mask ROM will load
M
Masanari Iida 已提交
1912
	  the first part of the ROM-able zImage which in turn loads the
1913 1914 1915 1916 1917 1918 1919
	  rest the kernel image to RAM.

config ZBOOT_ROM_NONE
	bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
	help
	  Do not load image from SD or MMC

1920 1921 1922
config ZBOOT_ROM_MMCIF
	bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
	help
1923 1924 1925 1926 1927 1928 1929 1930
	  Load image from MMCIF hardware block.

config ZBOOT_ROM_SH_MOBILE_SDHI
	bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
	help
	  Load image from SDHI hardware block

endchoice
1931

1932 1933
config ARM_APPENDED_DTB
	bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
1934
	depends on OF
1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951
	help
	  With this option, the boot code will look for a device tree binary
	  (DTB) appended to zImage
	  (e.g. cat zImage <filename>.dtb > zImage_w_dtb).

	  This is meant as a backward compatibility convenience for those
	  systems with a bootloader that can't be upgraded to accommodate
	  the documented boot protocol using a device tree.

	  Beware that there is very little in terms of protection against
	  this option being confused by leftover garbage in memory that might
	  look like a DTB header after a reboot if no actual DTB is appended
	  to zImage.  Do not leave this option active in a production kernel
	  if you don't intend to always append a DTB.  Proper passing of the
	  location into r2 of a bootloader provided DTB is always preferable
	  to this option.

1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963
config ARM_ATAG_DTB_COMPAT
	bool "Supplement the appended DTB with traditional ATAG information"
	depends on ARM_APPENDED_DTB
	help
	  Some old bootloaders can't be updated to a DTB capable one, yet
	  they provide ATAGs with memory configuration, the ramdisk address,
	  the kernel cmdline string, etc.  Such information is dynamically
	  provided by the bootloader and can't always be stored in a static
	  DTB.  To allow a device tree enabled kernel to be used with such
	  bootloaders, this option allows zImage to extract the information
	  from the ATAG list and store it at run time into the appended DTB.

1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982
choice
	prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
	default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER

config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
	bool "Use bootloader kernel arguments if available"
	help
	  Uses the command-line options passed by the boot loader instead of
	  the device tree bootargs property. If the boot loader doesn't provide
	  any, the device tree bootargs property will be used.

config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
	bool "Extend with bootloader kernel arguments"
	help
	  The command-line arguments provided by the boot loader will be
	  appended to the the device tree bootargs property.

endchoice

L
Linus Torvalds 已提交
1983 1984 1985 1986 1987 1988 1989 1990 1991 1992
config CMDLINE
	string "Default kernel command string"
	default ""
	help
	  On some architectures (EBSA110 and CATS), there is currently no way
	  for the boot loader to pass arguments to the kernel. For these
	  architectures, you should supply some command-line options at build
	  time by entering them here. As a minimum, you should specify the
	  memory size and the root device (e.g., mem=64M root=/dev/nfs).

1993 1994 1995
choice
	prompt "Kernel command line type" if CMDLINE != ""
	default CMDLINE_FROM_BOOTLOADER
1996
	depends on ATAGS
1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010

config CMDLINE_FROM_BOOTLOADER
	bool "Use bootloader kernel arguments if available"
	help
	  Uses the command-line options passed by the boot loader. If
	  the boot loader doesn't provide any, the default kernel command
	  string provided in CMDLINE will be used.

config CMDLINE_EXTEND
	bool "Extend bootloader kernel arguments"
	help
	  The command-line arguments provided by the boot loader will be
	  appended to the default kernel command string.

2011 2012 2013 2014 2015 2016 2017
config CMDLINE_FORCE
	bool "Always use the default kernel command string"
	help
	  Always use the default kernel command string, even if the boot
	  loader passes other arguments to the kernel.
	  This is useful if you cannot or don't want to change the
	  command-line options your boot loader passes to the kernel.
2018
endchoice
2019

L
Linus Torvalds 已提交
2020 2021
config XIP_KERNEL
	bool "Kernel Execute-In-Place from ROM"
2022
	depends on !ARM_LPAE && !ARCH_MULTIPLATFORM
L
Linus Torvalds 已提交
2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049
	help
	  Execute-In-Place allows the kernel to run from non-volatile storage
	  directly addressable by the CPU, such as NOR flash. This saves RAM
	  space since the text section of the kernel is not loaded from flash
	  to RAM.  Read-write sections, such as the data section and stack,
	  are still copied to RAM.  The XIP kernel is not compressed since
	  it has to run directly from flash, so it will take more space to
	  store it.  The flash address used to link the kernel object files,
	  and for storing it, is configuration dependent. Therefore, if you
	  say Y here, you must know the proper physical address where to
	  store the kernel image depending on your own flash memory usage.

	  Also note that the make target becomes "make xipImage" rather than
	  "make zImage" or "make Image".  The final kernel binary to put in
	  ROM memory will be arch/arm/boot/xipImage.

	  If unsure, say N.

config XIP_PHYS_ADDR
	hex "XIP Kernel Physical Location"
	depends on XIP_KERNEL
	default "0x00080000"
	help
	  This is the physical address in your flash memory the kernel will
	  be linked for and stored to.  This address is dependent on your
	  own flash usage.

R
Richard Purdie 已提交
2050 2051
config KEXEC
	bool "Kexec system call (EXPERIMENTAL)"
2052
	depends on (!SMP || PM_SLEEP_SMP)
R
Richard Purdie 已提交
2053 2054 2055
	help
	  kexec is a system call that implements the ability to shutdown your
	  current kernel, and to start another kernel.  It is like a reboot
M
Matt LaPlante 已提交
2056
	  but it is independent of the system firmware.   And like a reboot
R
Richard Purdie 已提交
2057 2058 2059 2060
	  you can start any kernel with it, not just Linux.

	  It is an ongoing process to be certain the hardware in a machine
	  is properly shutdown, so do not be surprised if this code does not
2061
	  initially work for you.
R
Richard Purdie 已提交
2062

2063 2064
config ATAGS_PROC
	bool "Export atags in procfs"
2065
	depends on ATAGS && KEXEC
2066
	default y
2067 2068 2069 2070
	help
	  Should the atags used to boot the kernel be exported in an "atags"
	  file in procfs. Useful with kexec.

2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082
config CRASH_DUMP
	bool "Build kdump crash kernel (EXPERIMENTAL)"
	help
	  Generate crash dump after being started by kexec. This should
	  be normally only set in special crash dump kernels which are
	  loaded in the main kernel with kexec-tools into a specially
	  reserved region and then later executed after a crash by
	  kdump/kexec. The crash dump kernel must be compiled to a
	  memory address not used by the main kernel

	  For more details see Documentation/kdump/kdump.txt

2083 2084 2085 2086 2087 2088 2089 2090 2091
config AUTO_ZRELADDR
	bool "Auto calculation of the decompressed kernel image address"
	help
	  ZRELADDR is the physical address where the decompressed kernel
	  image will be placed. If AUTO_ZRELADDR is selected, the address
	  will be determined at run-time by masking the current IP with
	  0xf8000000. This assumes the zImage being placed in the first 128MB
	  from start of memory.

L
Linus Torvalds 已提交
2092 2093
endmenu

2094
menu "CPU Power Management"
L
Linus Torvalds 已提交
2095 2096 2097

source "drivers/cpufreq/Kconfig"

2098 2099 2100 2101
source "drivers/cpuidle/Kconfig"

endmenu

L
Linus Torvalds 已提交
2102 2103 2104 2105 2106 2107
menu "Floating point emulation"

comment "At least one emulation must be selected"

config FPE_NWFPE
	bool "NWFPE math emulation"
2108
	depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
L
Linus Torvalds 已提交
2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119
	---help---
	  Say Y to include the NWFPE floating point emulator in the kernel.
	  This is necessary to run most binaries. Linux does not currently
	  support floating point hardware so you need to say Y here even if
	  your machine has an FPA or floating point co-processor podule.

	  You may say N here if you are going to load the Acorn FPEmulator
	  early in the bootup.

config FPE_NWFPE_XP
	bool "Support extended precision"
2120
	depends on FPE_NWFPE
L
Linus Torvalds 已提交
2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131
	help
	  Say Y to include 80-bit support in the kernel floating-point
	  emulator.  Otherwise, only 32 and 64-bit support is compiled in.
	  Note that gcc does not generate 80-bit operations by default,
	  so in most cases this option only enlarges the size of the
	  floating point emulator without any good reason.

	  You almost surely want to say N here.

config FPE_FASTFPE
	bool "FastFPE math emulation (EXPERIMENTAL)"
2132
	depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
L
Linus Torvalds 已提交
2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145
	---help---
	  Say Y here to include the FAST floating point emulator in the kernel.
	  This is an experimental much faster emulator which now also has full
	  precision for the mantissa.  It does not support any exceptions.
	  It is very simple, and approximately 3-6 times faster than NWFPE.

	  It should be sufficient for most programs.  It may be not suitable
	  for scientific calculations, but you have to check this for yourself.
	  If you do not feel you need a faster FP emulation you should better
	  choose NWFPE.

config VFP
	bool "VFP-format floating point maths"
2146
	depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
L
Linus Torvalds 已提交
2147 2148 2149 2150 2151 2152 2153 2154 2155
	help
	  Say Y to include VFP support code in the kernel. This is needed
	  if your hardware includes a VFP unit.

	  Please see <file:Documentation/arm/VFP/release-notes.txt> for
	  release notes and additional status information.

	  Say N if your target does not have VFP hardware.

2156 2157 2158 2159 2160
config VFPv3
	bool
	depends on VFP
	default y if CPU_V7

2161 2162 2163 2164 2165 2166 2167
config NEON
	bool "Advanced SIMD (NEON) Extension support"
	depends on VFPv3 && CPU_V7
	help
	  Say Y to include support code for NEON, the ARMv7 Advanced SIMD
	  Extension.

2168 2169
config KERNEL_MODE_NEON
	bool "Support for NEON in kernel mode"
2170
	depends on NEON && AEABI
2171 2172 2173
	help
	  Say Y to include support for NEON in kernel mode.

L
Linus Torvalds 已提交
2174 2175 2176 2177 2178 2179 2180 2181
endmenu

menu "Userspace binary formats"

source "fs/Kconfig.binfmt"

config ARTHUR
	tristate "RISC OS personality"
2182
	depends on !AEABI
L
Linus Torvalds 已提交
2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193
	help
	  Say Y here to include the kernel code necessary if you want to run
	  Acorn RISC OS/Arthur binaries under Linux. This code is still very
	  experimental; if this sounds frightening, say N and sleep in peace.
	  You can also say M here to compile this support as a module (which
	  will be called arthur).

endmenu

menu "Power management options"

R
Russell King 已提交
2194
source "kernel/power/Kconfig"
L
Linus Torvalds 已提交
2195

J
Johannes Berg 已提交
2196
config ARCH_SUSPEND_POSSIBLE
2197
	depends on !ARCH_S5PC100
2198
	depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
2199
		CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
J
Johannes Berg 已提交
2200 2201
	def_bool y

2202 2203 2204
config ARM_CPU_SUSPEND
	def_bool PM_SLEEP

2205 2206 2207 2208 2209
config ARCH_HIBERNATION_POSSIBLE
	bool
	depends on MMU
	default y if ARCH_SUSPEND_POSSIBLE

L
Linus Torvalds 已提交
2210 2211
endmenu

2212 2213
source "net/Kconfig"

2214
source "drivers/Kconfig"
L
Linus Torvalds 已提交
2215 2216 2217 2218 2219 2220 2221 2222 2223 2224

source "fs/Kconfig"

source "arch/arm/Kconfig.debug"

source "security/Kconfig"

source "crypto/Kconfig"

source "lib/Kconfig"
2225 2226

source "arch/arm/kvm/Kconfig"