Kconfig 64.7 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_WANT_IPC_PARSE_VERSION
9
	select BUILDTIME_EXTABLE_SORT if MMU
R
Russell King 已提交
10
	select CLONE_BACKWARDS
11
	select CPU_PM if (SUSPEND || CPU_IDLE)
12
	select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
13
	select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
14
	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
R
Russell King 已提交
15
	select GENERIC_IDLE_POLL_SETUP
16 17 18
	select GENERIC_IRQ_PROBE
	select GENERIC_IRQ_SHOW
	select GENERIC_PCI_IOMAP
19
	select GENERIC_SCHED_CLOCK
20 21 22 23
	select GENERIC_SMP_IDLE_THREAD
	select GENERIC_STRNCPY_FROM_USER
	select GENERIC_STRNLEN_USER
	select HARDIRQS_SW_RESEND
24
	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
J
Jason Wessel 已提交
25
	select HAVE_ARCH_KGDB
26
	select HAVE_ARCH_SECCOMP_FILTER
27
	select HAVE_ARCH_TRACEHOOK
28
	select HAVE_BPF_JIT
R
Russell King 已提交
29
	select HAVE_CONTEXT_TRACKING
30 31 32 33 34
	select HAVE_C_RECORDMCOUNT
	select HAVE_DEBUG_KMEMLEAK
	select HAVE_DMA_API_DEBUG
	select HAVE_DMA_ATTRS
	select HAVE_DMA_CONTIGUOUS if MMU
35
	select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
36
	select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
37
	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
38
	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
39
	select HAVE_GENERIC_DMA_COHERENT
40 41
	select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
	select HAVE_IDE if PCI || ISA || PCMCIA
42
	select HAVE_IRQ_TIME_ACCOUNTING
43
	select HAVE_KERNEL_GZIP
44
	select HAVE_KERNEL_LZ4
45
	select HAVE_KERNEL_LZMA
46
	select HAVE_KERNEL_LZO
47
	select HAVE_KERNEL_XZ
48 49 50
	select HAVE_KPROBES if !XIP_KERNEL
	select HAVE_KRETPROBES if (HAVE_KPROBES)
	select HAVE_MEMBLOCK
R
Russell King 已提交
51
	select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
52
	select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
53
	select HAVE_PERF_EVENTS
54
	select HAVE_REGS_AND_STACK_ACCESS_API
55
	select HAVE_SYSCALL_TRACEPOINTS
56
	select HAVE_UID16
57
	select IRQ_FORCED_THREADING
58
	select KTIME_SCALAR
R
Russell King 已提交
59 60 61
	select MODULES_USE_ELF_REL
	select OLD_SIGACTION
	select OLD_SIGSUSPEND3
62 63 64
	select PERF_USE_VMALLOC
	select RTC_LIB
	select SYS_SUPPORTS_APM_EMULATION
R
Russell King 已提交
65 66
	# Above selects are sorted alphabetically; please add new ones
	# according to that.  Thanks.
L
Linus Torvalds 已提交
67 68
	help
	  The ARM series is a line of low-power-consumption RISC chip designs
69
	  licensed by ARM Ltd and targeted at embedded applications and
L
Linus Torvalds 已提交
70
	  handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
71
	  manufactured, but legacy ARM-based PC hardware remains popular in
L
Linus Torvalds 已提交
72 73 74
	  Europe.  There is an ARM Linux project with a web page at
	  <http://www.arm.linux.org.uk/>.

75 76 77
config ARM_HAS_SG_CHAIN
	bool

78 79 80 81 82
config NEED_SG_DMA_LENGTH
	bool

config ARM_DMA_USE_IOMMU
	bool
83 84
	select ARM_HAS_SG_CHAIN
	select NEED_SG_DMA_LENGTH
85

86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106
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

R
Russell King 已提交
107 108 109
config HAVE_PWM
	bool

110 111 112
config MIGHT_HAVE_PCI
	bool

113 114 115
config SYS_SUPPORTS_APM_EMULATION
	bool

116 117 118 119
config HAVE_TCM
	bool
	select GENERIC_ALLOCATOR

120 121 122
config HAVE_PROC_CPU
	bool

A
Al Viro 已提交
123 124 125
config NO_IOPORT
	bool

L
Linus Torvalds 已提交
126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143
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

144 145 146 147
config STACKTRACE_SUPPORT
	bool
	default y

N
Nicolas Pitre 已提交
148 149 150 151 152
config HAVE_LATENCYTOP_SUPPORT
	bool
	depends on !SMP
	default y

153 154 155 156
config LOCKDEP_SUPPORT
	bool
	default y

R
Russell King 已提交
157 158 159 160
config TRACE_IRQFLAGS_SUPPORT
	bool
	default y

L
Linus Torvalds 已提交
161 162 163 164 165 166 167
config RWSEM_GENERIC_SPINLOCK
	bool
	default y

config RWSEM_XCHGADD_ALGORITHM
	bool

168 169 170 171 172 173
config ARCH_HAS_ILOG2_U32
	bool

config ARCH_HAS_ILOG2_U64
	bool

174 175 176 177 178 179 180
config ARCH_HAS_CPUFREQ
	bool
	help
	  Internal node to signify that the ARCH has CPUFREQ support
	  and that the relevant menu configurations are displayed for
	  it.

181 182 183
config ARCH_HAS_BANDGAP
	bool

184 185 186 187
config GENERIC_HWEIGHT
	bool
	default y

L
Linus Torvalds 已提交
188 189 190 191
config GENERIC_CALIBRATE_DELAY
	bool
	default y

192 193 194
config ARCH_MAY_HAVE_PC_FDC
	bool

195 196 197
config ZONE_DMA
	bool

198 199 200
config NEED_DMA_MAP_STATE
       def_bool y

201 202 203
config ARCH_HAS_DMA_SET_COHERENT_MASK
	bool

L
Linus Torvalds 已提交
204 205 206 207 208 209
config GENERIC_ISA_DMA
	bool

config FIQ
	bool

210 211 212
config NEED_RET_TO_USER
	bool

213 214 215
config ARCH_MTD_XIP
	bool

216 217
config VECTORS_BASE
	hex
218
	default 0xffff0000 if MMU || CPU_HIGH_VECTOR
219 220 221
	default DRAM_BASE if REMAP_VECTORS_TO_RAM
	default 0x00000000
	help
R
Russell King 已提交
222 223
	  The base address of exception vectors.  This must be two pages
	  in size.
224

225
config ARM_PATCH_PHYS_VIRT
226 227
	bool "Patch physical to virtual translations at runtime" if EMBEDDED
	default y
N
Nicolas Pitre 已提交
228
	depends on !XIP_KERNEL && MMU
229 230
	depends on !ARCH_REALVIEW || !SPARSEMEM
	help
231 232 233
	  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.
234

235
	  This can only be used with non-XIP MMU kernels where the base
236
	  of physical memory is at a 16MB boundary.
237

238 239 240
	  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.
241

242 243 244 245 246 247 248
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.

249 250 251 252 253 254 255
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.

256
config NEED_MACH_MEMORY_H
257 258
	bool
	help
259 260 261
	  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.
262

263
config PHYS_OFFSET
264
	hex "Physical address of main memory" if MMU
265
	depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
266
	default DRAM_BASE if !MMU
267
	help
268 269
	  Please provide the physical address corresponding to the
	  location of main memory in your system.
270

271 272 273 274
config GENERIC_BUG
	def_bool y
	depends on BUG

L
Linus Torvalds 已提交
275 276
source "init/Kconfig"

277 278
source "kernel/Kconfig.freezer"

L
Linus Torvalds 已提交
279 280
menu "System Type"

281 282 283 284 285 286 287
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'.

288 289 290 291
#
# 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
292 293
choice
	prompt "ARM system type"
294 295
	default ARCH_VERSATILE if !MMU
	default ARCH_MULTIPLATFORM if MMU
L
Linus Torvalds 已提交
296

R
Rob Herring 已提交
297 298
config ARCH_MULTIPLATFORM
	bool "Allow multiple platforms to be selected"
299
	depends on MMU
R
Rob Herring 已提交
300 301
	select ARM_PATCH_PHYS_VIRT
	select AUTO_ZRELADDR
302
	select COMMON_CLK
R
Rob Herring 已提交
303
	select MULTI_IRQ_HANDLER
304 305 306
	select SPARSE_IRQ
	select USE_OF

307 308
config ARCH_INTEGRATOR
	bool "ARM Ltd. Integrator family"
309
	select ARCH_HAS_CPUFREQ
310
	select ARM_AMBA
311
	select COMMON_CLK
312
	select COMMON_CLK_VERSATILE
313
	select GENERIC_CLOCKEVENTS
314
	select HAVE_TCM
315
	select ICST
316 317
	select MULTI_IRQ_HANDLER
	select NEED_MACH_MEMORY_H
318
	select PLAT_VERSATILE
319
	select SPARSE_IRQ
320
	select VERSATILE_FPGA_IRQ
321 322 323 324 325
	help
	  Support for ARM's Integrator platform.

config ARCH_REALVIEW
	bool "ARM Ltd. RealView family"
326
	select ARCH_WANT_OPTIONAL_GPIOLIB
327
	select ARM_AMBA
328
	select ARM_TIMER_SP804
329 330
	select COMMON_CLK
	select COMMON_CLK_VERSATILE
331
	select GENERIC_CLOCKEVENTS
332
	select GPIO_PL061 if GPIOLIB
333
	select ICST
334
	select NEED_MACH_MEMORY_H
335 336
	select PLAT_VERSATILE
	select PLAT_VERSATILE_CLCD
337 338 339 340 341
	help
	  This enables support for ARM Ltd RealView boards.

config ARCH_VERSATILE
	bool "ARM Ltd. Versatile family"
342
	select ARCH_WANT_OPTIONAL_GPIOLIB
343
	select ARM_AMBA
344
	select ARM_TIMER_SP804
345
	select ARM_VIC
346
	select CLKDEV_LOOKUP
347
	select GENERIC_CLOCKEVENTS
348
	select HAVE_MACH_CLKDEV
349
	select ICST
350
	select PLAT_VERSATILE
351
	select PLAT_VERSATILE_CLCD
352
	select PLAT_VERSATILE_CLOCK
353
	select VERSATILE_FPGA_IRQ
354 355 356
	help
	  This enables support for ARM Ltd Versatile board.

357 358
config ARCH_AT91
	bool "Atmel AT91"
359
	select ARCH_REQUIRE_GPIOLIB
360
	select CLKDEV_LOOKUP
361
	select IRQ_DOMAIN
362
	select NEED_MACH_GPIO_H
R
Rob Herring 已提交
363
	select NEED_MACH_IO_H if PCCARD
364 365
	select PINCTRL
	select PINCTRL_AT91 if USE_OF
366
	help
367 368
	  This enables support for systems based on Atmel
	  AT91RM9200 and AT91SAM9* processors.
369

370 371
config ARCH_CLPS711X
	bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
372
	select ARCH_REQUIRE_GPIOLIB
373
	select AUTO_ZRELADDR
374
	select CLKSRC_MMIO
375 376
	select COMMON_CLK
	select CPU_ARM720T
377
	select GENERIC_CLOCKEVENTS
378
	select MFD_SYSCON
379
	select MULTI_IRQ_HANDLER
380
	select SPARSE_IRQ
381 382 383
	help
	  Support for Cirrus Logic 711x/721x/731x based boards.

384 385 386
config ARCH_GEMINI
	bool "Cortina Systems Gemini"
	select ARCH_REQUIRE_GPIOLIB
387
	select ARCH_USES_GETTIMEOFFSET
388
	select CPU_FA526
R
Russell King 已提交
389
	select NEED_MACH_GPIO_H
390 391 392
	help
	  Support for the Cortina Systems Gemini family SoCs

L
Linus Torvalds 已提交
393 394
config ARCH_EBSA110
	bool "EBSA-110"
395
	select ARCH_USES_GETTIMEOFFSET
396
	select CPU_SA110
397
	select ISA
398
	select NEED_MACH_IO_H
399
	select NEED_MACH_MEMORY_H
400
	select NO_IOPORT
L
Linus Torvalds 已提交
401 402
	help
	  This is an evaluation board for the StrongARM processor available
403
	  from Digital. It has limited hardware on-board, including an
L
Linus Torvalds 已提交
404 405 406
	  Ethernet interface, two PCMCIA sockets, two serial ports and a
	  parallel port.

407 408
config ARCH_EP93XX
	bool "EP93xx-based"
409 410 411
	select ARCH_HAS_HOLES_MEMORYMODEL
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_USES_GETTIMEOFFSET
412 413
	select ARM_AMBA
	select ARM_VIC
414
	select CLKDEV_LOOKUP
415
	select CPU_ARM920T
416
	select NEED_MACH_MEMORY_H
417 418 419
	help
	  This enables support for the Cirrus EP93xx series of CPUs.

L
Linus Torvalds 已提交
420 421
config ARCH_FOOTBRIDGE
	bool "FootBridge"
422
	select CPU_SA110
L
Linus Torvalds 已提交
423
	select FOOTBRIDGE
424
	select GENERIC_CLOCKEVENTS
425
	select HAVE_IDE
426
	select NEED_MACH_IO_H if !MMU
427
	select NEED_MACH_MEMORY_H
428 429 430
	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
431

432 433
config ARCH_NETX
	bool "Hilscher NetX based"
434
	select ARM_VIC
435
	select CLKSRC_MMIO
436
	select CPU_ARM926T
437
	select GENERIC_CLOCKEVENTS
438
	help
439 440
	  This enables support for systems based on the Hilscher NetX Soc

441 442 443
config ARCH_IOP13XX
	bool "IOP13xx-based"
	depends on MMU
444
	select CPU_XSC3
445
	select NEED_MACH_MEMORY_H
446
	select NEED_RET_TO_USER
447 448 449
	select PCI
	select PLAT_IOP
	select VMSPLIT_1G
450 451 452
	help
	  Support for Intel's IOP13XX (XScale) family of processors.

453 454
config ARCH_IOP32X
	bool "IOP32x-based"
455
	depends on MMU
456
	select ARCH_REQUIRE_GPIOLIB
457
	select CPU_XSCALE
458
	select NEED_MACH_GPIO_H
459
	select NEED_RET_TO_USER
460
	select PCI
461
	select PLAT_IOP
462
	help
463 464 465 466 467 468
	  Support for Intel's 80219 and IOP32X (XScale) family of
	  processors.

config ARCH_IOP33X
	bool "IOP33x-based"
	depends on MMU
469
	select ARCH_REQUIRE_GPIOLIB
470
	select CPU_XSCALE
471
	select NEED_MACH_GPIO_H
472
	select NEED_RET_TO_USER
473
	select PCI
474
	select PLAT_IOP
475 476
	help
	  Support for Intel's IOP33X (XScale) family of processors.
L
Linus Torvalds 已提交
477

478 479
config ARCH_IXP4XX
	bool "IXP4xx-based"
480
	depends on MMU
481
	select ARCH_HAS_DMA_SET_COHERENT_MASK
482
	select ARCH_REQUIRE_GPIOLIB
483
	select CLKSRC_MMIO
484
	select CPU_XSCALE
485
	select DMABOUNCE if PCI
486
	select GENERIC_CLOCKEVENTS
487
	select MIGHT_HAVE_PCI
488
	select NEED_MACH_IO_H
489
	select USB_EHCI_BIG_ENDIAN_DESC
R
Russell King 已提交
490
	select USB_EHCI_BIG_ENDIAN_MMIO
491
	help
492
	  Support for Intel's IXP4XX (XScale) family of processors.
493

494 495 496
config ARCH_DOVE
	bool "Marvell Dove"
	select ARCH_REQUIRE_GPIOLIB
497
	select CPU_PJ4
498
	select GENERIC_CLOCKEVENTS
499
	select MIGHT_HAVE_PCI
R
Russell King 已提交
500
	select MVEBU_MBUS
501 502
	select PINCTRL
	select PINCTRL_DOVE
503
	select PLAT_ORION_LEGACY
504
	select USB_ARCH_HAS_EHCI
505 506 507
	help
	  Support for the Marvell Dove SoC 88AP510

508 509
config ARCH_KIRKWOOD
	bool "Marvell Kirkwood"
510
	select ARCH_HAS_CPUFREQ
511
	select ARCH_REQUIRE_GPIOLIB
512
	select CPU_FEROCEON
513
	select GENERIC_CLOCKEVENTS
R
Russell King 已提交
514
	select MVEBU_MBUS
515
	select PCI
516
	select PCI_QUIRKS
517 518
	select PINCTRL
	select PINCTRL_KIRKWOOD
519
	select PLAT_ORION_LEGACY
520 521 522 523
	help
	  Support for the following Marvell Kirkwood series SoCs:
	  88F6180, 88F6192 and 88F6281.

524 525
config ARCH_MV78XX0
	bool "Marvell MV78xx0"
526
	select ARCH_REQUIRE_GPIOLIB
527
	select CPU_FEROCEON
528
	select GENERIC_CLOCKEVENTS
R
Russell King 已提交
529
	select MVEBU_MBUS
530
	select PCI
531
	select PLAT_ORION_LEGACY
532 533 534 535
	help
	  Support for the following Marvell MV78xx0 series SoCs:
	  MV781x0, MV782x0.

536
config ARCH_ORION5X
537 538
	bool "Marvell Orion"
	depends on MMU
539
	select ARCH_REQUIRE_GPIOLIB
540
	select CPU_FEROCEON
541
	select GENERIC_CLOCKEVENTS
R
Russell King 已提交
542
	select MVEBU_MBUS
543
	select PCI
544
	select PLAT_ORION_LEGACY
545
	help
546
	  Support for the following Marvell Orion 5x series SoCs:
547
	  Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
548
	  Orion-2 (5281), Orion-1-90 (6183).
549

550
config ARCH_MMP
551
	bool "Marvell PXA168/910/MMP2"
552 553
	depends on MMU
	select ARCH_REQUIRE_GPIOLIB
554
	select CLKDEV_LOOKUP
555
	select GENERIC_ALLOCATOR
556
	select GENERIC_CLOCKEVENTS
557
	select GPIO_PXA
H
Haojian Zhuang 已提交
558
	select IRQ_DOMAIN
H
Haojian Zhuang 已提交
559
	select MULTI_IRQ_HANDLER
560
	select NEED_MACH_GPIO_H
A
Axel Lin 已提交
561
	select PINCTRL
562
	select PLAT_PXA
H
Haojian Zhuang 已提交
563
	select SPARSE_IRQ
564
	help
565
	  Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
566 567 568

config ARCH_KS8695
	bool "Micrel/Kendin KS8695"
569
	select ARCH_REQUIRE_GPIOLIB
570
	select CLKSRC_MMIO
571
	select CPU_ARM922T
572
	select GENERIC_CLOCKEVENTS
573
	select NEED_MACH_MEMORY_H
574 575 576 577 578 579
	help
	  Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
	  System-on-Chip devices.

config ARCH_W90X900
	bool "Nuvoton W90X900 CPU"
580
	select ARCH_REQUIRE_GPIOLIB
581
	select CLKDEV_LOOKUP
582
	select CLKSRC_MMIO
583
	select CPU_ARM926T
584
	select GENERIC_CLOCKEVENTS
585
	help
586 587 588 589 590 591 592
	  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>
593

594 595 596 597 598 599 600 601 602 603 604 605 606 607 608
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 HAVE_PWM
	select USB_ARCH_HAS_OHCI
	select USE_OF
	help
	  Support for the NXP LPC32XX family of processors

L
Linus Torvalds 已提交
609
config ARCH_PXA
E
eric miao 已提交
610
	bool "PXA2xx/PXA3xx-based"
611
	depends on MMU
612
	select ARCH_HAS_CPUFREQ
613 614 615 616
	select ARCH_MTD_XIP
	select ARCH_REQUIRE_GPIOLIB
	select ARM_CPU_SUSPEND if PM
	select AUTO_ZRELADDR
617
	select CLKDEV_LOOKUP
618
	select CLKSRC_MMIO
619
	select GENERIC_CLOCKEVENTS
620
	select GPIO_PXA
621
	select HAVE_IDE
622
	select MULTI_IRQ_HANDLER
623
	select NEED_MACH_GPIO_H
624 625
	select PLAT_PXA
	select SPARSE_IRQ
626
	help
E
eric miao 已提交
627
	  Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
L
Linus Torvalds 已提交
628

629 630
config ARCH_MSM
	bool "Qualcomm MSM"
P
Pavel Machek 已提交
631
	select ARCH_REQUIRE_GPIOLIB
632
	select CLKSRC_OF if OF
633
	select COMMON_CLK
634
	select GENERIC_CLOCKEVENTS
635
	help
636 637 638 639 640
	  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).
641

642
config ARCH_SHMOBILE
643
	bool "Renesas SH-Mobile / R-Mobile"
644
	select ARM_PATCH_PHYS_VIRT
P
Paul Mundt 已提交
645
	select CLKDEV_LOOKUP
646
	select GENERIC_CLOCKEVENTS
647
	select HAVE_ARM_SCU if SMP
648
	select HAVE_ARM_TWD if SMP
649
	select HAVE_MACH_CLKDEV
650
	select HAVE_SMP
651
	select MIGHT_HAVE_CACHE_L2X0
652
	select MULTI_IRQ_HANDLER
653
	select NO_IOPORT
654
	select PINCTRL
655 656
	select PM_GENERIC_DOMAINS if PM
	select SPARSE_IRQ
657
	help
658
	  Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
659

L
Linus Torvalds 已提交
660 661 662
config ARCH_RPC
	bool "RiscPC"
	select ARCH_ACORN
663
	select ARCH_MAY_HAVE_PC_FDC
664
	select ARCH_SPARSEMEM_ENABLE
665
	select ARCH_USES_GETTIMEOFFSET
666
	select FIQ
667
	select HAVE_IDE
668 669
	select HAVE_PATA_PLATFORM
	select ISA_DMA_API
670
	select NEED_MACH_IO_H
671
	select NEED_MACH_MEMORY_H
672
	select NO_IOPORT
673
	select VIRT_TO_BUS
L
Linus Torvalds 已提交
674 675 676 677 678 679
	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"
680
	select ARCH_HAS_CPUFREQ
681 682 683 684 685
	select ARCH_MTD_XIP
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_SPARSEMEM_ENABLE
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
R
Russell King 已提交
686
	select CPU_FREQ
687
	select CPU_SA1100
688
	select GENERIC_CLOCKEVENTS
689
	select HAVE_IDE
690
	select ISA
691
	select NEED_MACH_GPIO_H
692
	select NEED_MACH_MEMORY_H
693
	select SPARSE_IRQ
694 695
	help
	  Support for StrongARM 11x0 based boards.
L
Linus Torvalds 已提交
696

697 698
config ARCH_S3C24XX
	bool "Samsung S3C24XX SoCs"
B
Ben Dooks 已提交
699
	select ARCH_HAS_CPUFREQ
700
	select ARCH_REQUIRE_GPIOLIB
701
	select CLKDEV_LOOKUP
702
	select CLKSRC_SAMSUNG_PWM
703
	select GENERIC_CLOCKEVENTS
704
	select GPIO_SAMSUNG
705
	select HAVE_S3C2410_I2C if I2C
706
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
707
	select HAVE_S3C_RTC if RTC_CLASS
708
	select MULTI_IRQ_HANDLER
709
	select NEED_MACH_GPIO_H
710
	select NEED_MACH_IO_H
711
	select SAMSUNG_ATAGS
L
Linus Torvalds 已提交
712
	help
713 714 715 716
	  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).
717

B
Ben Dooks 已提交
718 719
config ARCH_S3C64XX
	bool "Samsung S3C64XX"
720 721
	select ARCH_HAS_CPUFREQ
	select ARCH_REQUIRE_GPIOLIB
722
	select ARM_VIC
723
	select CLKDEV_LOOKUP
724
	select CLKSRC_SAMSUNG_PWM
725
	select CPU_V6
726
	select GENERIC_CLOCKEVENTS
727
	select GPIO_SAMSUNG
728 729
	select HAVE_S3C2410_I2C if I2C
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
M
Mark Brown 已提交
730
	select HAVE_TCM
731
	select NEED_MACH_GPIO_H
732
	select NO_IOPORT
733
	select PLAT_SAMSUNG
734
	select PM_GENERIC_DOMAINS
735 736
	select S3C_DEV_NAND
	select S3C_GPIO_TRACK
737
	select SAMSUNG_ATAGS
738
	select SAMSUNG_CLKSRC
739
	select SAMSUNG_GPIOLIB_4BIT
740
	select SAMSUNG_WAKEMASK
741
	select SAMSUNG_WDT_RESET
742
	select USB_ARCH_HAS_OHCI
B
Ben Dooks 已提交
743 744 745
	help
	  Samsung S3C64XX series based systems

746 747
config ARCH_S5P64X0
	bool "Samsung S5P6440 S5P6450"
748
	select CLKDEV_LOOKUP
749
	select CLKSRC_SAMSUNG_PWM
750
	select CPU_V6
751
	select GENERIC_CLOCKEVENTS
752
	select GPIO_SAMSUNG
753
	select HAVE_S3C2410_I2C if I2C
754
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
755
	select HAVE_S3C_RTC if RTC_CLASS
756
	select NEED_MACH_GPIO_H
757
	select SAMSUNG_ATAGS
R
Russell King 已提交
758
	select SAMSUNG_WDT_RESET
759
	help
760 761
	  Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
	  SMDK6450.
762

763 764
config ARCH_S5PC100
	bool "Samsung S5PC100"
765
	select ARCH_REQUIRE_GPIOLIB
766
	select CLKDEV_LOOKUP
767
	select CLKSRC_SAMSUNG_PWM
768
	select CPU_V7
769
	select GENERIC_CLOCKEVENTS
770
	select GPIO_SAMSUNG
771
	select HAVE_S3C2410_I2C if I2C
772
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
773
	select HAVE_S3C_RTC if RTC_CLASS
774
	select NEED_MACH_GPIO_H
775
	select SAMSUNG_ATAGS
R
Russell King 已提交
776
	select SAMSUNG_WDT_RESET
777
	help
778
	  Samsung S5PC100 series based systems
779

780 781
config ARCH_S5PV210
	bool "Samsung S5PV210/S5PC110"
782
	select ARCH_HAS_CPUFREQ
783
	select ARCH_HAS_HOLES_MEMORYMODEL
784
	select ARCH_SPARSEMEM_ENABLE
785
	select CLKDEV_LOOKUP
786
	select CLKSRC_SAMSUNG_PWM
787
	select CPU_V7
788
	select GENERIC_CLOCKEVENTS
789
	select GPIO_SAMSUNG
790
	select HAVE_S3C2410_I2C if I2C
791
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
792
	select HAVE_S3C_RTC if RTC_CLASS
793
	select NEED_MACH_GPIO_H
794
	select NEED_MACH_MEMORY_H
795
	select SAMSUNG_ATAGS
796 797 798
	help
	  Samsung S5PV210/S5PC110 series based systems

799
config ARCH_EXYNOS
800
	bool "Samsung EXYNOS"
801
	select ARCH_HAS_CPUFREQ
802
	select ARCH_HAS_HOLES_MEMORYMODEL
803
	select ARCH_REQUIRE_GPIOLIB
804
	select ARCH_SPARSEMEM_ENABLE
805
	select ARM_GIC
806
	select COMMON_CLK
807
	select CPU_V7
808
	select GENERIC_CLOCKEVENTS
809
	select HAVE_S3C2410_I2C if I2C
810
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
811
	select HAVE_S3C_RTC if RTC_CLASS
812
	select NEED_MACH_MEMORY_H
813
	select SPARSE_IRQ
814
	select USE_OF
815
	help
816
	  Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
817

818 819
config ARCH_DAVINCI
	bool "TI DaVinci"
820
	select ARCH_HAS_HOLES_MEMORYMODEL
821
	select ARCH_REQUIRE_GPIOLIB
822
	select CLKDEV_LOOKUP
D
David Brownell 已提交
823
	select GENERIC_ALLOCATOR
824
	select GENERIC_CLOCKEVENTS
R
Russell King 已提交
825
	select GENERIC_IRQ_CHIP
826
	select HAVE_IDE
827
	select NEED_MACH_GPIO_H
828
	select TI_PRIV_EDMA
829
	select USE_OF
830
	select ZONE_DMA
831 832 833
	help
	  Support for TI's DaVinci platform.

834 835
config ARCH_OMAP1
	bool "TI OMAP1"
A
Arnd Bergmann 已提交
836
	depends on MMU
837
	select ARCH_HAS_CPUFREQ
838
	select ARCH_HAS_HOLES_MEMORYMODEL
839
	select ARCH_OMAP
840
	select ARCH_REQUIRE_GPIOLIB
841
	select CLKDEV_LOOKUP
842
	select CLKSRC_MMIO
843
	select GENERIC_CLOCKEVENTS
844 845 846 847 848
	select GENERIC_IRQ_CHIP
	select HAVE_IDE
	select IRQ_DOMAIN
	select NEED_MACH_IO_H if PCCARD
	select NEED_MACH_MEMORY_H
849
	help
850
	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
851

L
Linus Torvalds 已提交
852 853
endchoice

R
Rob Herring 已提交
854 855 856 857 858 859 860 861
menu "Multiple platform selection"
	depends on ARCH_MULTIPLATFORM

comment "CPU Core family selection"

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

config ARCH_MULTI_V5
	bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
	depends on !ARCH_MULTI_V6_V7
870
	select ARCH_MULTI_V4_V5
871 872 873
	select CPU_ARM926T if (!CPU_ARM946E || CPU_ARM1020 || \
		CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
		CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
R
Rob Herring 已提交
874 875 876 877 878

config ARCH_MULTI_V4_V5
	bool

config ARCH_MULTI_V6
879
	bool "ARMv6 based platforms (ARM11)"
R
Rob Herring 已提交
880
	select ARCH_MULTI_V6_V7
881
	select CPU_V6
R
Rob Herring 已提交
882 883

config ARCH_MULTI_V7
884
	bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
R
Rob Herring 已提交
885 886
	default y
	select ARCH_MULTI_V6_V7
887
	select CPU_V7
R
Rob Herring 已提交
888 889 890 891 892 893 894 895 896 897

config ARCH_MULTI_V6_V7
	bool

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

endmenu

898 899 900 901 902
#
# 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.
#
903 904
source "arch/arm/mach-mvebu/Kconfig"

905 906
source "arch/arm/mach-at91/Kconfig"

907 908
source "arch/arm/mach-bcm/Kconfig"

909 910
source "arch/arm/mach-bcm2835/Kconfig"

L
Linus Torvalds 已提交
911 912
source "arch/arm/mach-clps711x/Kconfig"

913 914
source "arch/arm/mach-cns3xxx/Kconfig"

915 916 917 918
source "arch/arm/mach-davinci/Kconfig"

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

919 920
source "arch/arm/mach-ep93xx/Kconfig"

L
Linus Torvalds 已提交
921 922
source "arch/arm/mach-footbridge/Kconfig"

923 924
source "arch/arm/mach-gemini/Kconfig"

R
Rob Herring 已提交
925 926
source "arch/arm/mach-highbank/Kconfig"

L
Linus Torvalds 已提交
927 928
source "arch/arm/mach-integrator/Kconfig"

929 930 931
source "arch/arm/mach-iop32x/Kconfig"

source "arch/arm/mach-iop33x/Kconfig"
L
Linus Torvalds 已提交
932

933 934
source "arch/arm/mach-iop13xx/Kconfig"

L
Linus Torvalds 已提交
935 936
source "arch/arm/mach-ixp4xx/Kconfig"

937 938
source "arch/arm/mach-keystone/Kconfig"

939 940 941 942 943 944
source "arch/arm/mach-kirkwood/Kconfig"

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

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

945 946
source "arch/arm/mach-mv78xx0/Kconfig"

S
Shawn Guo 已提交
947
source "arch/arm/mach-imx/Kconfig"
L
Linus Torvalds 已提交
948

949 950
source "arch/arm/mach-mxs/Kconfig"

951
source "arch/arm/mach-netx/Kconfig"
952

953 954
source "arch/arm/mach-nomadik/Kconfig"

D
Daniel Tang 已提交
955 956
source "arch/arm/mach-nspire/Kconfig"

957 958 959
source "arch/arm/plat-omap/Kconfig"

source "arch/arm/mach-omap1/Kconfig"
L
Linus Torvalds 已提交
960

961 962
source "arch/arm/mach-omap2/Kconfig"

963
source "arch/arm/mach-orion5x/Kconfig"
964

R
Rob Herring 已提交
965 966
source "arch/arm/mach-picoxcell/Kconfig"

967 968
source "arch/arm/mach-pxa/Kconfig"
source "arch/arm/plat-pxa/Kconfig"
969

970 971 972 973
source "arch/arm/mach-mmp/Kconfig"

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

974 975
source "arch/arm/mach-rockchip/Kconfig"

976
source "arch/arm/mach-sa1100/Kconfig"
977

978
source "arch/arm/plat-samsung/Kconfig"
979

R
Rob Herring 已提交
980 981
source "arch/arm/mach-socfpga/Kconfig"

982
source "arch/arm/mach-spear/Kconfig"
983

984 985
source "arch/arm/mach-sti/Kconfig"

986
source "arch/arm/mach-s3c24xx/Kconfig"
L
Linus Torvalds 已提交
987

988
source "arch/arm/mach-s3c64xx/Kconfig"
B
Ben Dooks 已提交
989

990
source "arch/arm/mach-s5p64x0/Kconfig"
991

992 993
source "arch/arm/mach-s5pc100/Kconfig"

994 995
source "arch/arm/mach-s5pv210/Kconfig"

996
source "arch/arm/mach-exynos/Kconfig"
997

998
source "arch/arm/mach-shmobile/Kconfig"
999

1000 1001
source "arch/arm/mach-sunxi/Kconfig"

1002 1003
source "arch/arm/mach-prima2/Kconfig"

1004 1005
source "arch/arm/mach-tegra/Kconfig"

1006
source "arch/arm/mach-u300/Kconfig"
L
Linus Torvalds 已提交
1007

1008
source "arch/arm/mach-ux500/Kconfig"
L
Linus Torvalds 已提交
1009 1010 1011

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

1012
source "arch/arm/mach-vexpress/Kconfig"
1013
source "arch/arm/plat-versatile/Kconfig"
1014

1015 1016
source "arch/arm/mach-virt/Kconfig"

1017 1018
source "arch/arm/mach-vt8500/Kconfig"

1019 1020
source "arch/arm/mach-w90x900/Kconfig"

1021 1022
source "arch/arm/mach-zynq/Kconfig"

L
Linus Torvalds 已提交
1023 1024 1025 1026
# Definitions to make life easier
config ARCH_ACORN
	bool

1027 1028
config PLAT_IOP
	bool
M
Mikael Pettersson 已提交
1029
	select GENERIC_CLOCKEVENTS
1030

L
Lennert Buytenhek 已提交
1031 1032
config PLAT_ORION
	bool
1033
	select CLKSRC_MMIO
1034
	select COMMON_CLK
R
Russell King 已提交
1035
	select GENERIC_IRQ_CHIP
1036
	select IRQ_DOMAIN
L
Lennert Buytenhek 已提交
1037

1038 1039 1040 1041
config PLAT_ORION_LEGACY
	bool
	select PLAT_ORION

1042 1043 1044
config PLAT_PXA
	bool

1045 1046 1047
config PLAT_VERSATILE
	bool

1048 1049
config ARM_TIMER_SP804
	bool
1050
	select CLKSRC_MMIO
1051
	select CLKSRC_OF if OF
1052

L
Linus Torvalds 已提交
1053 1054
source arch/arm/mm/Kconfig

1055 1056 1057 1058 1059
config ARM_NR_BANKS
	int
	default 16 if ARCH_EP93XX
	default 8

1060
config IWMMXT
1061
	bool "Enable iWMMXt support" if !CPU_PJ4
1062
	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
1063
	default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4
1064 1065 1066 1067
	help
	  Enable support for iWMMXt context switching at run time if
	  running on a CPU that supports it.

L
Linus Torvalds 已提交
1068 1069
config XSCALE_PMU
	bool
1070
	depends on CPU_XSCALE
L
Linus Torvalds 已提交
1071 1072
	default y

1073 1074 1075 1076 1077
config MULTI_IRQ_HANDLER
	bool
	help
	  Allow each machine to specify it's own IRQ handler at run time.

1078 1079 1080 1081
if !MMU
source "arch/arm/Kconfig-nommu"
endif

1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095
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

1096 1097 1098 1099 1100 1101 1102 1103 1104
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.

1105 1106
config ARM_ERRATA_411920
	bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1107
	depends on CPU_V6 || CPU_V6K
1108 1109 1110 1111 1112 1113
	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.

1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129
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.

1130 1131 1132
config ARM_ERRATA_458693
	bool "ARM errata: Processor deadlock when a false hazard is created"
	depends on CPU_V7
1133
	depends on !ARCH_MULTIPLATFORM
1134 1135 1136 1137 1138 1139 1140 1141 1142 1143
	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.

1144 1145 1146
config ARM_ERRATA_460075
	bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
	depends on CPU_V7
1147
	depends on !ARCH_MULTIPLATFORM
1148 1149 1150 1151 1152 1153 1154 1155 1156
	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.

1157 1158 1159
config ARM_ERRATA_742230
	bool "ARM errata: DMB operation may be faulty"
	depends on CPU_V7 && SMP
1160
	depends on !ARCH_MULTIPLATFORM
1161 1162 1163 1164 1165 1166 1167 1168 1169
	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.

1170 1171 1172
config ARM_ERRATA_742231
	bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
	depends on CPU_V7 && SMP
1173
	depends on !ARCH_MULTIPLATFORM
1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184
	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.

1185
config PL310_ERRATA_588369
1186
	bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
1187
	depends on CACHE_L2X0
1188 1189 1190 1191 1192 1193 1194 1195
	help
	   The PL310 L2 cache controller implements three types of Clean &
	   Invalidate maintenance operations: by Physical Address
	   (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
	   They are architecturally defined to behave as the execution of a
	   clean operation followed immediately by an invalidate operation,
	   both performing to the same memory location. This functionality
	   is not correctly implemented in PL310 as clean lines are not
1196
	   invalidated as a result of these operations.
1197

1198 1199 1200 1201 1202 1203 1204 1205 1206 1207
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.

1208 1209
config ARM_ERRATA_720789
	bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1210
	depends on CPU_V7
1211 1212 1213 1214 1215 1216 1217 1218
	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.
1219

R
Russell King 已提交
1220
config PL310_ERRATA_727915
1221
	bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
R
Russell King 已提交
1222 1223 1224 1225 1226 1227 1228 1229 1230
	depends on CACHE_L2X0
	help
	  PL310 implements the Clean & Invalidate by Way L2 cache maintenance
	  operation (offset 0x7FC). This operation runs in background so that
	  PL310 can handle normal accesses while it is in progress. Under very
	  rare circumstances, due to this erratum, write data can be lost when
	  PL310 treats a cacheable write transaction during a Clean &
	  Invalidate by Way operation.

1231 1232 1233
config ARM_ERRATA_743622
	bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
	depends on CPU_V7
1234
	depends on !ARCH_MULTIPLATFORM
1235 1236
	help
	  This option enables the workaround for the 743622 Cortex-A9
1237
	  (r2p*) erratum. Under very rare conditions, a faulty
1238 1239 1240 1241 1242 1243 1244
	  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.

1245 1246
config ARM_ERRATA_751472
	bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1247
	depends on CPU_V7
1248
	depends on !ARCH_MULTIPLATFORM
1249 1250 1251 1252 1253 1254 1255
	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.

1256 1257
config PL310_ERRATA_753970
	bool "PL310 errata: cache sync operation may be faulty"
1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270
	depends on CACHE_PL310
	help
	  This option enables the workaround for the 753970 PL310 (r3p0) erratum.

	  Under some condition the effect of cache sync operation on
	  the store buffer still remains when the operation completes.
	  This means that the store buffer is always asked to drain and
	  this prevents it from merging any further writes. The workaround
	  is to replace the normal offset of cache sync operation (0x730)
	  by another offset targeting an unmapped PL310 register 0x740.
	  This has the same effect as the cache sync operation: store buffer
	  drain and waiting for all buffers empty.

1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281
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.

1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292
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.

1293 1294
config ARM_ERRATA_364296
	bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
1295
	depends on CPU_V6
1296 1297 1298 1299 1300 1301 1302 1303 1304
	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.

1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318
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.

1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330
config PL310_ERRATA_769419
	bool "PL310 errata: no automatic Store Buffer drain"
	depends on CACHE_L2X0
	help
	  On revisions of the PL310 prior to r3p2, the Store Buffer does
	  not automatically drain. This can cause normal, non-cacheable
	  writes to be retained when the memory system is idle, leading
	  to suboptimal I/O performance for drivers using coherent DMA.
	  This option adds a write barrier to the cpu_idle loop so that,
	  on systems with an outer cache, the store buffer is drained
	  explicitly.

1331 1332 1333 1334 1335 1336 1337 1338 1339 1340
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.

1341 1342 1343 1344 1345 1346 1347 1348 1349 1350
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.

1351 1352 1353 1354 1355 1356 1357 1358 1359
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
1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377
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.

1378
# Select ISA DMA controller support
L
Linus Torvalds 已提交
1379 1380
config ISA_DMA
	bool
1381
	select ISA_DMA_API
L
Linus Torvalds 已提交
1382

1383
# Select ISA DMA interface
A
Al Viro 已提交
1384 1385 1386
config ISA_DMA_API
	bool

L
Linus Torvalds 已提交
1387
config PCI
1388
	bool "PCI support" if MIGHT_HAVE_PCI
L
Linus Torvalds 已提交
1389 1390 1391 1392 1393 1394
	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.

1395 1396 1397 1398
config PCI_DOMAINS
	bool
	depends on PCI

1399 1400 1401 1402 1403 1404
config PCI_NANOENGINE
	bool "BSE nanoEngine PCI support"
	depends on SA1100_NANOENGINE
	help
	  Enable PCI on the BSE nanoEngine board.

1405 1406 1407
config PCI_SYSCALL
	def_bool PCI

M
Mike Rapoport 已提交
1408 1409 1410 1411 1412 1413
config PCI_HOST_ITE8152
	bool
	depends on PCI && MACH_ARMCORE
	default y
	select DMABOUNCE

L
Linus Torvalds 已提交
1414
source "drivers/pci/Kconfig"
1415
source "drivers/pci/pcie/Kconfig"
L
Linus Torvalds 已提交
1416 1417 1418 1419 1420 1421 1422

source "drivers/pcmcia/Kconfig"

endmenu

menu "Kernel Features"

1423 1424 1425 1426 1427 1428 1429 1430 1431
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
1432
config SMP
1433
	bool "Symmetric Multi-Processing"
1434
	depends on CPU_V6K || CPU_V7
1435
	depends on GENERIC_CLOCKEVENTS
1436
	depends on HAVE_SMP
1437
	depends on MMU || ARM_MPU
1438
	select USE_GENERIC_SMP_HELPERS
L
Linus Torvalds 已提交
1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449
	help
	  This enables support for systems with more than one CPU. If you have
	  a system with only one CPU, like most personal computers, say N. If
	  you have a system with more than one CPU, say Y.

	  If you say N here, the kernel will run on single and multiprocessor
	  machines, but will use only one CPU of a multiprocessor machine. If
	  you say Y here, the kernel will run on many, but not all, single
	  processor machines. On a single processor machine, the kernel will
	  run faster if you say N here.

P
Paul Bolle 已提交
1450
	  See also <file:Documentation/x86/i386/IO-APIC.txt>,
L
Linus Torvalds 已提交
1451
	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1452
	  <http://tldp.org/HOWTO/SMP-HOWTO.html>.
L
Linus Torvalds 已提交
1453 1454 1455

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

1456 1457
config SMP_ON_UP
	bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1458
	depends on SMP && !XIP_KERNEL && MMU
1459 1460 1461 1462 1463 1464 1465 1466 1467
	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.

1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492
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.

1493 1494 1495 1496 1497
config HAVE_ARM_SCU
	bool
	help
	  This option enables support for the ARM system coherency unit

1498
config HAVE_ARM_ARCH_TIMER
1499 1500
	bool "Architected timer support"
	depends on CPU_V7
1501
	select ARM_ARCH_TIMER
1502 1503 1504
	help
	  This option enables support for the ARM architected timer

1505 1506 1507
config HAVE_ARM_TWD
	bool
	depends on SMP
1508
	select CLKSRC_OF if OF
1509 1510 1511
	help
	  This options enables support for the ARM timer and watchdog unit

1512 1513 1514 1515 1516 1517 1518 1519
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.

1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542
choice
	prompt "Memory split"
	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
	default 0x40000000 if VMSPLIT_1G
	default 0x80000000 if VMSPLIT_2G
	default 0xC0000000

L
Linus Torvalds 已提交
1543 1544 1545 1546 1547 1548
config NR_CPUS
	int "Maximum number of CPUs (2-32)"
	range 2 32
	depends on SMP
	default "4"

1549
config HOTPLUG_CPU
1550
	bool "Support for hot-pluggable CPUs"
1551
	depends on SMP
1552 1553 1554 1555
	help
	  Say Y here to experiment with turning CPUs off and on.  CPUs
	  can be controlled through /sys/devices/system/cpu.

1556 1557 1558 1559 1560 1561 1562 1563 1564 1565
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").

1566 1567 1568
# 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.
1569 1570
config ARCH_NR_GPIO
	int
1571
	default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
1572
	default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || SOC_DRA7XX
1573
	default 392 if ARCH_U8500
1574 1575
	default 352 if ARCH_VT8500
	default 288 if ARCH_SUNXI
1576
	default 264 if MACH_H4700
1577 1578 1579 1580 1581 1582
	default 0
	help
	  Maximum number of GPIOs in the system.

	  If unsure, leave the default value.

1583
source kernel/Kconfig.preempt
L
Linus Torvalds 已提交
1584

R
Russell King 已提交
1585
config HZ_FIXED
1586
	int
1587
	default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
K
Kukjin Kim 已提交
1588
		ARCH_S5PV210 || ARCH_EXYNOS4
1589
	default AT91_TIMER_HZ if ARCH_AT91
1590
	default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
R
Russell King 已提交
1591
	default 0
R
Russell King 已提交
1592 1593

choice
R
Russell King 已提交
1594
	depends on HZ_FIXED = 0
R
Russell King 已提交
1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618
	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
1619
	default HZ_FIXED if HZ_FIXED != 0
R
Russell King 已提交
1620 1621 1622 1623 1624 1625 1626 1627 1628
	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
1629

1630 1631 1632
config SCHED_HRTICK
	def_bool HIGH_RES_TIMERS

1633
config THUMB2_KERNEL
1634
	bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
1635
	depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
1636
	default y if CPU_THUMBONLY
1637 1638
	select AEABI
	select ARM_ASM_UNIFIED
1639
	select ARM_UNWIND
1640 1641 1642 1643 1644 1645 1646
	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.

1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677
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.

1678 1679 1680
config ARM_ASM_UNIFIED
	bool

1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695
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.

1696
config OABI_COMPAT
1697
	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1698
	depends on AEABI && !THUMB2_KERNEL
1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712
	default y
	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.
	  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
	  at all). If in doubt say Y.

1713
config ARCH_HAS_HOLES_MEMORYMODEL
1714 1715
	bool

1716 1717 1718
config ARCH_SPARSEMEM_ENABLE
	bool

1719 1720 1721
config ARCH_SPARSEMEM_DEFAULT
	def_bool ARCH_SPARSEMEM_ENABLE

1722
config ARCH_SELECT_MEMORY_MODEL
R
Russell King 已提交
1723
	def_bool ARCH_SPARSEMEM_ENABLE
Y
Yasunori Goto 已提交
1724

1725 1726 1727
config HAVE_ARCH_PFN_VALID
	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM

N
Nicolas Pitre 已提交
1728
config HIGHMEM
1729 1730
	bool "High Memory Support"
	depends on MMU
N
Nicolas Pitre 已提交
1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744
	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
1745 1746 1747 1748
config HIGHPTE
	bool "Allocate 2nd-level pagetables from highmem"
	depends on HIGHMEM

1749 1750
config HW_PERF_EVENTS
	bool "Enable hardware performance counter support for perf events"
1751
	depends on PERF_EVENTS
1752 1753 1754 1755 1756
	default y
	help
	  Enable hardware performance counter support for perf events. If
	  disabled, perf events will use software events only.

1757 1758 1759 1760
config SYS_SUPPORTS_HUGETLBFS
       def_bool y
       depends on ARM_LPAE

1761 1762 1763 1764
config HAVE_ARCH_TRANSPARENT_HUGEPAGE
       def_bool y
       depends on ARM_LPAE

1765 1766 1767
config ARCH_WANT_GENERAL_HUGETLB
	def_bool y

1768 1769
source "mm/Kconfig"

1770 1771 1772
config FORCE_MAX_ZONEORDER
	int "Maximum zone order" if ARCH_SHMOBILE
	range 11 64 if ARCH_SHMOBILE
1773
	default "12" if SOC_AM33XX
1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786
	default "9" if SA1111
	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
1787 1788
config ALIGNMENT_TRAP
	bool
1789
	depends on CPU_CP15_MMU
L
Linus Torvalds 已提交
1790
	default y if !ARCH_EBSA110
1791
	select HAVE_PROC_CPU if PROC_FS
L
Linus Torvalds 已提交
1792
	help
1793
	  ARM processors cannot fetch/store information which is not
L
Linus Torvalds 已提交
1794 1795 1796 1797 1798 1799 1800
	  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.

1801
config UACCESS_WITH_MEMCPY
1802 1803
	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
	depends on MMU
1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816
	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
1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830
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.

1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842
config CC_STACKPROTECTOR
	bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
	help
	  This option turns on the -fstack-protector GCC feature. This
	  feature puts, at the beginning of functions, a canary value on
	  the stack just before the return address, and validates
	  the value just before actually returning.  Stack based buffer
	  overflows (that need to overwrite this return address) now also
	  overwrite the canary, which gets detected and the attack is then
	  neutralized via a kernel panic.
	  This feature requires gcc version 4.2 or above.

1843 1844 1845 1846 1847 1848
config XEN_DOM0
	def_bool y
	depends on XEN

config XEN
	bool "Xen guest support on ARM (EXPERIMENTAL)"
1849
	depends on ARM && AEABI && OF
1850
	depends on CPU_V7 && !CPU_V6
1851
	depends on !GENERIC_ATOMIC64
1852
	select ARM_PSCI
1853 1854 1855
	help
	  Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.

L
Linus Torvalds 已提交
1856 1857 1858 1859
endmenu

menu "Boot options"

G
Grant Likely 已提交
1860 1861
config USE_OF
	bool "Flattened Device Tree support"
1862
	select IRQ_DOMAIN
G
Grant Likely 已提交
1863 1864 1865 1866 1867
	select OF
	select OF_EARLY_FLATTREE
	help
	  Include support for flattened device tree machine descriptions.

1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884
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
1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901
# 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
1902 1903 1904 1905 1906 1907
	  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
1908 1909 1910 1911 1912 1913 1914 1915 1916 1917

	  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
	help
	  Say Y here if you intend to execute your compressed kernel image
	  (zImage) directly from ROM or flash.  If unsure, say N.

1918 1919
choice
	prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1920
	depends on ZBOOT_ROM && ARCH_SH7372
1921 1922 1923
	default ZBOOT_ROM_NONE
	help
	  Include experimental SD/MMC loading code in the ROM-able zImage.
M
Masanari Iida 已提交
1924
	  With this enabled it is possible to write the ROM-able zImage
1925 1926
	  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
1927
	  the first part of the ROM-able zImage which in turn loads the
1928 1929 1930 1931 1932 1933 1934
	  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

1935 1936 1937
config ZBOOT_ROM_MMCIF
	bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
	help
1938 1939 1940 1941 1942 1943 1944 1945
	  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
1946

1947 1948
config ARM_APPENDED_DTB
	bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
1949
	depends on OF && !ZBOOT_ROM
1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966
	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.

1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978
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.

1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997
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
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007
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).

2008 2009 2010
choice
	prompt "Kernel command line type" if CMDLINE != ""
	default CMDLINE_FROM_BOOTLOADER
2011
	depends on ATAGS
2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

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.

2026 2027 2028 2029 2030 2031 2032
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.
2033
endchoice
2034

L
Linus Torvalds 已提交
2035 2036
config XIP_KERNEL
	bool "Kernel Execute-In-Place from ROM"
R
Rob Herring 已提交
2037
	depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
L
Linus Torvalds 已提交
2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064
	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
2065 2066
config KEXEC
	bool "Kexec system call (EXPERIMENTAL)"
2067
	depends on (!SMP || PM_SLEEP_SMP)
R
Richard Purdie 已提交
2068 2069 2070
	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
2071
	  but it is independent of the system firmware.   And like a reboot
R
Richard Purdie 已提交
2072 2073 2074 2075
	  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
2076
	  initially work for you.
R
Richard Purdie 已提交
2077

2078 2079
config ATAGS_PROC
	bool "Export atags in procfs"
2080
	depends on ATAGS && KEXEC
2081
	default y
2082 2083 2084 2085
	help
	  Should the atags used to boot the kernel be exported in an "atags"
	  file in procfs. Useful with kexec.

2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097
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

2098 2099
config AUTO_ZRELADDR
	bool "Auto calculation of the decompressed kernel image address"
2100
	depends on !ZBOOT_ROM
2101 2102 2103 2104 2105 2106 2107
	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
2108 2109
endmenu

2110
menu "CPU Power Management"
L
Linus Torvalds 已提交
2111

2112
if ARCH_HAS_CPUFREQ
L
Linus Torvalds 已提交
2113 2114 2115
source "drivers/cpufreq/Kconfig"
endif

2116 2117 2118 2119
source "drivers/cpuidle/Kconfig"

endmenu

L
Linus Torvalds 已提交
2120 2121 2122 2123 2124 2125
menu "Floating point emulation"

comment "At least one emulation must be selected"

config FPE_NWFPE
	bool "NWFPE math emulation"
2126
	depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
L
Linus Torvalds 已提交
2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137
	---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"
2138
	depends on FPE_NWFPE
L
Linus Torvalds 已提交
2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149
	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)"
2150
	depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
L
Linus Torvalds 已提交
2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163
	---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"
2164
	depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
L
Linus Torvalds 已提交
2165 2166 2167 2168 2169 2170 2171 2172 2173
	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.

2174 2175 2176 2177 2178
config VFPv3
	bool
	depends on VFP
	default y if CPU_V7

2179 2180 2181 2182 2183 2184 2185
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.

2186 2187
config KERNEL_MODE_NEON
	bool "Support for NEON in kernel mode"
2188
	depends on NEON && AEABI
2189 2190 2191
	help
	  Say Y to include support for NEON in kernel mode.

L
Linus Torvalds 已提交
2192 2193 2194 2195 2196 2197 2198 2199
endmenu

menu "Userspace binary formats"

source "fs/Kconfig.binfmt"

config ARTHUR
	tristate "RISC OS personality"
2200
	depends on !AEABI
L
Linus Torvalds 已提交
2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211
	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
2212
source "kernel/power/Kconfig"
L
Linus Torvalds 已提交
2213

J
Johannes Berg 已提交
2214
config ARCH_SUSPEND_POSSIBLE
2215
	depends on !ARCH_S5PC100
2216
	depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
2217
		CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
J
Johannes Berg 已提交
2218 2219
	def_bool y

2220 2221 2222
config ARM_CPU_SUSPEND
	def_bool PM_SLEEP

L
Linus Torvalds 已提交
2223 2224
endmenu

2225 2226
source "net/Kconfig"

2227
source "drivers/Kconfig"
L
Linus Torvalds 已提交
2228 2229 2230 2231 2232 2233 2234 2235 2236 2237

source "fs/Kconfig"

source "arch/arm/Kconfig.debug"

source "security/Kconfig"

source "crypto/Kconfig"

source "lib/Kconfig"
2238 2239

source "arch/arm/kvm/Kconfig"