Kconfig 65.7 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_MIGHT_HAVE_PC_PARPORT
9
	select ARCH_USE_CMPXCHG_LOCKREF
10
	select ARCH_WANT_IPC_PARSE_VERSION
11
	select BUILDTIME_EXTABLE_SORT if MMU
R
Russell King 已提交
12
	select CLONE_BACKWARDS
13
	select CPU_PM if (SUSPEND || CPU_IDLE)
14
	select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
15
	select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
16
	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
R
Russell King 已提交
17
	select GENERIC_IDLE_POLL_SETUP
18 19 20
	select GENERIC_IRQ_PROBE
	select GENERIC_IRQ_SHOW
	select GENERIC_PCI_IOMAP
21
	select GENERIC_SCHED_CLOCK
22 23 24 25
	select GENERIC_SMP_IDLE_THREAD
	select GENERIC_STRNCPY_FROM_USER
	select GENERIC_STRNLEN_USER
	select HARDIRQS_SW_RESEND
26
	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
J
Jason Wessel 已提交
27
	select HAVE_ARCH_KGDB
28
	select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
29
	select HAVE_ARCH_TRACEHOOK
30
	select HAVE_BPF_JIT
R
Russell King 已提交
31
	select HAVE_CONTEXT_TRACKING
32 33 34 35 36
	select HAVE_C_RECORDMCOUNT
	select HAVE_DEBUG_KMEMLEAK
	select HAVE_DMA_API_DEBUG
	select HAVE_DMA_ATTRS
	select HAVE_DMA_CONTIGUOUS if MMU
37
	select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
38
	select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
39
	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
40
	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
41
	select HAVE_GENERIC_DMA_COHERENT
42 43
	select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
	select HAVE_IDE if PCI || ISA || PCMCIA
44
	select HAVE_IRQ_TIME_ACCOUNTING
45
	select HAVE_KERNEL_GZIP
46
	select HAVE_KERNEL_LZ4
47
	select HAVE_KERNEL_LZMA
48
	select HAVE_KERNEL_LZO
49
	select HAVE_KERNEL_XZ
50 51 52
	select HAVE_KPROBES if !XIP_KERNEL
	select HAVE_KRETPROBES if (HAVE_KPROBES)
	select HAVE_MEMBLOCK
R
Russell King 已提交
53
	select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
54
	select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
55
	select HAVE_PERF_EVENTS
56 57
	select HAVE_PERF_REGS
	select HAVE_PERF_USER_STACK_DUMP
58
	select HAVE_REGS_AND_STACK_ACCESS_API
59
	select HAVE_SYSCALL_TRACEPOINTS
60
	select HAVE_UID16
61
	select HAVE_VIRT_CPU_ACCOUNTING_GEN
62
	select IRQ_FORCED_THREADING
63
	select KTIME_SCALAR
R
Russell King 已提交
64 65 66
	select MODULES_USE_ELF_REL
	select OLD_SIGACTION
	select OLD_SIGSUSPEND3
67 68 69
	select PERF_USE_VMALLOC
	select RTC_LIB
	select SYS_SUPPORTS_APM_EMULATION
R
Russell King 已提交
70 71
	# Above selects are sorted alphabetically; please add new ones
	# according to that.  Thanks.
L
Linus Torvalds 已提交
72 73
	help
	  The ARM series is a line of low-power-consumption RISC chip designs
74
	  licensed by ARM Ltd and targeted at embedded applications and
L
Linus Torvalds 已提交
75
	  handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
76
	  manufactured, but legacy ARM-based PC hardware remains popular in
L
Linus Torvalds 已提交
77 78 79
	  Europe.  There is an ARM Linux project with a web page at
	  <http://www.arm.linux.org.uk/>.

80 81 82
config ARM_HAS_SG_CHAIN
	bool

83 84 85 86 87
config NEED_SG_DMA_LENGTH
	bool

config ARM_DMA_USE_IOMMU
	bool
88 89
	select ARM_HAS_SG_CHAIN
	select NEED_SG_DMA_LENGTH
90

91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111
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
112 113 114
config HAVE_PWM
	bool

115 116 117
config MIGHT_HAVE_PCI
	bool

118 119 120
config SYS_SUPPORTS_APM_EMULATION
	bool

121 122 123 124
config HAVE_TCM
	bool
	select GENERIC_ALLOCATOR

125 126 127
config HAVE_PROC_CPU
	bool

A
Al Viro 已提交
128 129 130
config NO_IOPORT
	bool

L
Linus Torvalds 已提交
131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148
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

149 150 151 152
config STACKTRACE_SUPPORT
	bool
	default y

N
Nicolas Pitre 已提交
153 154 155 156 157
config HAVE_LATENCYTOP_SUPPORT
	bool
	depends on !SMP
	default y

158 159 160 161
config LOCKDEP_SUPPORT
	bool
	default y

R
Russell King 已提交
162 163 164 165
config TRACE_IRQFLAGS_SUPPORT
	bool
	default y

L
Linus Torvalds 已提交
166 167 168 169 170 171 172
config RWSEM_GENERIC_SPINLOCK
	bool
	default y

config RWSEM_XCHGADD_ALGORITHM
	bool

173 174 175 176 177 178
config ARCH_HAS_ILOG2_U32
	bool

config ARCH_HAS_ILOG2_U64
	bool

179 180 181 182 183 184 185
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.

186 187 188
config ARCH_HAS_BANDGAP
	bool

189 190 191 192
config GENERIC_HWEIGHT
	bool
	default y

L
Linus Torvalds 已提交
193 194 195 196
config GENERIC_CALIBRATE_DELAY
	bool
	default y

197 198 199
config ARCH_MAY_HAVE_PC_FDC
	bool

200 201 202
config ZONE_DMA
	bool

203 204 205
config NEED_DMA_MAP_STATE
       def_bool y

206 207 208
config ARCH_HAS_DMA_SET_COHERENT_MASK
	bool

L
Linus Torvalds 已提交
209 210 211 212 213 214
config GENERIC_ISA_DMA
	bool

config FIQ
	bool

215 216 217
config NEED_RET_TO_USER
	bool

218 219 220
config ARCH_MTD_XIP
	bool

221 222
config VECTORS_BASE
	hex
223
	default 0xffff0000 if MMU || CPU_HIGH_VECTOR
224 225 226
	default DRAM_BASE if REMAP_VECTORS_TO_RAM
	default 0x00000000
	help
R
Russell King 已提交
227 228
	  The base address of exception vectors.  This must be two pages
	  in size.
229

230
config ARM_PATCH_PHYS_VIRT
231 232
	bool "Patch physical to virtual translations at runtime" if EMBEDDED
	default y
N
Nicolas Pitre 已提交
233
	depends on !XIP_KERNEL && MMU
234 235
	depends on !ARCH_REALVIEW || !SPARSEMEM
	help
236 237 238
	  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.
239

240
	  This can only be used with non-XIP MMU kernels where the base
241
	  of physical memory is at a 16MB boundary.
242

243 244 245
	  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.
246

247 248 249 250 251 252 253
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.

254 255 256 257 258 259 260
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.

261
config NEED_MACH_MEMORY_H
262 263
	bool
	help
264 265 266
	  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.
267

268
config PHYS_OFFSET
269
	hex "Physical address of main memory" if MMU
270
	depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
271
	default DRAM_BASE if !MMU
272
	help
273 274
	  Please provide the physical address corresponding to the
	  location of main memory in your system.
275

276 277 278 279
config GENERIC_BUG
	def_bool y
	depends on BUG

L
Linus Torvalds 已提交
280 281
source "init/Kconfig"

282 283
source "kernel/Kconfig.freezer"

L
Linus Torvalds 已提交
284 285
menu "System Type"

286 287 288 289 290 291 292
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'.

293 294 295 296
#
# 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
297 298
choice
	prompt "ARM system type"
299 300
	default ARCH_VERSATILE if !MMU
	default ARCH_MULTIPLATFORM if MMU
L
Linus Torvalds 已提交
301

R
Rob Herring 已提交
302 303
config ARCH_MULTIPLATFORM
	bool "Allow multiple platforms to be selected"
304
	depends on MMU
R
Rob Herring 已提交
305 306
	select ARM_PATCH_PHYS_VIRT
	select AUTO_ZRELADDR
307
	select COMMON_CLK
R
Rob Herring 已提交
308
	select MULTI_IRQ_HANDLER
309 310 311
	select SPARSE_IRQ
	select USE_OF

312 313
config ARCH_INTEGRATOR
	bool "ARM Ltd. Integrator family"
314
	select ARCH_HAS_CPUFREQ
315
	select ARM_AMBA
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
368
	select NEED_MACH_GPIO_H
R
Rob Herring 已提交
369
	select NEED_MACH_IO_H if PCCARD
370 371
	select PINCTRL
	select PINCTRL_AT91 if USE_OF
372
	help
373 374
	  This enables support for systems based on Atmel
	  AT91RM9200 and AT91SAM9* processors.
375

376 377
config ARCH_CLPS711X
	bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
378
	select ARCH_REQUIRE_GPIOLIB
379
	select AUTO_ZRELADDR
380
	select CLKSRC_MMIO
381 382
	select COMMON_CLK
	select CPU_ARM720T
383
	select GENERIC_CLOCKEVENTS
384
	select MFD_SYSCON
385
	select MULTI_IRQ_HANDLER
386
	select SPARSE_IRQ
387 388 389
	help
	  Support for Cirrus Logic 711x/721x/731x based boards.

390 391 392
config ARCH_GEMINI
	bool "Cortina Systems Gemini"
	select ARCH_REQUIRE_GPIOLIB
393
	select CLKSRC_MMIO
394
	select CPU_FA526
395
	select GENERIC_CLOCKEVENTS
396 397 398
	help
	  Support for the Cortina Systems Gemini family SoCs

L
Linus Torvalds 已提交
399 400
config ARCH_EBSA110
	bool "EBSA-110"
401
	select ARCH_USES_GETTIMEOFFSET
402
	select CPU_SA110
403
	select ISA
404
	select NEED_MACH_IO_H
405
	select NEED_MACH_MEMORY_H
406
	select NO_IOPORT
L
Linus Torvalds 已提交
407 408
	help
	  This is an evaluation board for the StrongARM processor available
409
	  from Digital. It has limited hardware on-board, including an
L
Linus Torvalds 已提交
410 411 412
	  Ethernet interface, two PCMCIA sockets, two serial ports and a
	  parallel port.

413 414
config ARCH_EP93XX
	bool "EP93xx-based"
415 416 417
	select ARCH_HAS_HOLES_MEMORYMODEL
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_USES_GETTIMEOFFSET
418 419
	select ARM_AMBA
	select ARM_VIC
420
	select CLKDEV_LOOKUP
421
	select CPU_ARM920T
422
	select NEED_MACH_MEMORY_H
423 424 425
	help
	  This enables support for the Cirrus EP93xx series of CPUs.

L
Linus Torvalds 已提交
426 427
config ARCH_FOOTBRIDGE
	bool "FootBridge"
428
	select CPU_SA110
L
Linus Torvalds 已提交
429
	select FOOTBRIDGE
430
	select GENERIC_CLOCKEVENTS
431
	select HAVE_IDE
432
	select NEED_MACH_IO_H if !MMU
433
	select NEED_MACH_MEMORY_H
434 435 436
	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
437

438 439
config ARCH_NETX
	bool "Hilscher NetX based"
440
	select ARM_VIC
441
	select CLKSRC_MMIO
442
	select CPU_ARM926T
443
	select GENERIC_CLOCKEVENTS
444
	help
445 446
	  This enables support for systems based on the Hilscher NetX Soc

447 448 449
config ARCH_IOP13XX
	bool "IOP13xx-based"
	depends on MMU
450
	select CPU_XSC3
451
	select NEED_MACH_MEMORY_H
452
	select NEED_RET_TO_USER
453 454 455
	select PCI
	select PLAT_IOP
	select VMSPLIT_1G
456 457 458
	help
	  Support for Intel's IOP13XX (XScale) family of processors.

459 460
config ARCH_IOP32X
	bool "IOP32x-based"
461
	depends on MMU
462
	select ARCH_REQUIRE_GPIOLIB
463
	select CPU_XSCALE
464
	select GPIO_IOP
465
	select NEED_RET_TO_USER
466
	select PCI
467
	select PLAT_IOP
468
	help
469 470 471 472 473 474
	  Support for Intel's 80219 and IOP32X (XScale) family of
	  processors.

config ARCH_IOP33X
	bool "IOP33x-based"
	depends on MMU
475
	select ARCH_REQUIRE_GPIOLIB
476
	select CPU_XSCALE
477
	select GPIO_IOP
478
	select NEED_RET_TO_USER
479
	select PCI
480
	select PLAT_IOP
481 482
	help
	  Support for Intel's IOP33X (XScale) family of processors.
L
Linus Torvalds 已提交
483

484 485
config ARCH_IXP4XX
	bool "IXP4xx-based"
486
	depends on MMU
487
	select ARCH_HAS_DMA_SET_COHERENT_MASK
488
	select ARCH_SUPPORTS_BIG_ENDIAN
489
	select ARCH_REQUIRE_GPIOLIB
490
	select CLKSRC_MMIO
491
	select CPU_XSCALE
492
	select DMABOUNCE if PCI
493
	select GENERIC_CLOCKEVENTS
494
	select MIGHT_HAVE_PCI
495
	select NEED_MACH_IO_H
496
	select USB_EHCI_BIG_ENDIAN_DESC
R
Russell King 已提交
497
	select USB_EHCI_BIG_ENDIAN_MMIO
498
	help
499
	  Support for Intel's IXP4XX (XScale) family of processors.
500

501 502 503
config ARCH_DOVE
	bool "Marvell Dove"
	select ARCH_REQUIRE_GPIOLIB
504
	select CPU_PJ4
505
	select GENERIC_CLOCKEVENTS
506
	select MIGHT_HAVE_PCI
R
Russell King 已提交
507
	select MVEBU_MBUS
508 509
	select PINCTRL
	select PINCTRL_DOVE
510
	select PLAT_ORION_LEGACY
511
	select USB_ARCH_HAS_EHCI
512 513 514
	help
	  Support for the Marvell Dove SoC 88AP510

515 516
config ARCH_KIRKWOOD
	bool "Marvell Kirkwood"
517
	select ARCH_HAS_CPUFREQ
518
	select ARCH_REQUIRE_GPIOLIB
519
	select CPU_FEROCEON
520
	select GENERIC_CLOCKEVENTS
R
Russell King 已提交
521
	select MVEBU_MBUS
522
	select PCI
523
	select PCI_QUIRKS
524 525
	select PINCTRL
	select PINCTRL_KIRKWOOD
526
	select PLAT_ORION_LEGACY
527 528 529 530
	help
	  Support for the following Marvell Kirkwood series SoCs:
	  88F6180, 88F6192 and 88F6281.

531 532
config ARCH_MV78XX0
	bool "Marvell MV78xx0"
533
	select ARCH_REQUIRE_GPIOLIB
534
	select CPU_FEROCEON
535
	select GENERIC_CLOCKEVENTS
R
Russell King 已提交
536
	select MVEBU_MBUS
537
	select PCI
538
	select PLAT_ORION_LEGACY
539 540 541 542
	help
	  Support for the following Marvell MV78xx0 series SoCs:
	  MV781x0, MV782x0.

543
config ARCH_ORION5X
544 545
	bool "Marvell Orion"
	depends on MMU
546
	select ARCH_REQUIRE_GPIOLIB
547
	select CPU_FEROCEON
548
	select GENERIC_CLOCKEVENTS
R
Russell King 已提交
549
	select MVEBU_MBUS
550
	select PCI
551
	select PLAT_ORION_LEGACY
552
	help
553
	  Support for the following Marvell Orion 5x series SoCs:
554
	  Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
555
	  Orion-2 (5281), Orion-1-90 (6183).
556

557
config ARCH_MMP
558
	bool "Marvell PXA168/910/MMP2"
559 560
	depends on MMU
	select ARCH_REQUIRE_GPIOLIB
561
	select CLKDEV_LOOKUP
562
	select GENERIC_ALLOCATOR
563
	select GENERIC_CLOCKEVENTS
564
	select GPIO_PXA
H
Haojian Zhuang 已提交
565
	select IRQ_DOMAIN
H
Haojian Zhuang 已提交
566
	select MULTI_IRQ_HANDLER
A
Axel Lin 已提交
567
	select PINCTRL
568
	select PLAT_PXA
H
Haojian Zhuang 已提交
569
	select SPARSE_IRQ
570
	help
571
	  Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
572 573 574

config ARCH_KS8695
	bool "Micrel/Kendin KS8695"
575
	select ARCH_REQUIRE_GPIOLIB
576
	select CLKSRC_MMIO
577
	select CPU_ARM922T
578
	select GENERIC_CLOCKEVENTS
579
	select NEED_MACH_MEMORY_H
580 581 582 583 584 585
	help
	  Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
	  System-on-Chip devices.

config ARCH_W90X900
	bool "Nuvoton W90X900 CPU"
586
	select ARCH_REQUIRE_GPIOLIB
587
	select CLKDEV_LOOKUP
588
	select CLKSRC_MMIO
589
	select CPU_ARM926T
590
	select GENERIC_CLOCKEVENTS
591
	help
592 593 594 595 596 597 598
	  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>
599

600 601 602 603 604 605 606 607 608 609 610 611 612 613 614
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
615
config ARCH_PXA
E
eric miao 已提交
616
	bool "PXA2xx/PXA3xx-based"
617
	depends on MMU
618
	select ARCH_HAS_CPUFREQ
619 620 621 622
	select ARCH_MTD_XIP
	select ARCH_REQUIRE_GPIOLIB
	select ARM_CPU_SUSPEND if PM
	select AUTO_ZRELADDR
623
	select CLKDEV_LOOKUP
624
	select CLKSRC_MMIO
625
	select GENERIC_CLOCKEVENTS
626
	select GPIO_PXA
627
	select HAVE_IDE
628 629 630
	select MULTI_IRQ_HANDLER
	select PLAT_PXA
	select SPARSE_IRQ
631
	help
E
eric miao 已提交
632
	  Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
L
Linus Torvalds 已提交
633

634 635
config ARCH_MSM
	bool "Qualcomm MSM"
P
Pavel Machek 已提交
636
	select ARCH_REQUIRE_GPIOLIB
637
	select CLKSRC_OF if OF
638
	select COMMON_CLK
639
	select GENERIC_CLOCKEVENTS
640
	help
641 642 643 644 645
	  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).
646

647
config ARCH_SHMOBILE
648
	bool "Renesas SH-Mobile / R-Mobile"
649
	select ARM_PATCH_PHYS_VIRT
P
Paul Mundt 已提交
650
	select CLKDEV_LOOKUP
651
	select GENERIC_CLOCKEVENTS
652
	select HAVE_ARM_SCU if SMP
653
	select HAVE_ARM_TWD if SMP
654
	select HAVE_MACH_CLKDEV
655
	select HAVE_SMP
656
	select MIGHT_HAVE_CACHE_L2X0
657
	select MULTI_IRQ_HANDLER
658
	select NO_IOPORT
659
	select PINCTRL
660 661
	select PM_GENERIC_DOMAINS if PM
	select SPARSE_IRQ
662
	help
663
	  Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
664

L
Linus Torvalds 已提交
665 666 667
config ARCH_RPC
	bool "RiscPC"
	select ARCH_ACORN
668
	select ARCH_MAY_HAVE_PC_FDC
669
	select ARCH_SPARSEMEM_ENABLE
670
	select ARCH_USES_GETTIMEOFFSET
671
	select FIQ
672
	select HAVE_IDE
673 674
	select HAVE_PATA_PLATFORM
	select ISA_DMA_API
675
	select NEED_MACH_IO_H
676
	select NEED_MACH_MEMORY_H
677
	select NO_IOPORT
678
	select VIRT_TO_BUS
L
Linus Torvalds 已提交
679 680 681 682 683 684
	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"
685
	select ARCH_HAS_CPUFREQ
686 687 688 689 690
	select ARCH_MTD_XIP
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_SPARSEMEM_ENABLE
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
R
Russell King 已提交
691
	select CPU_FREQ
692
	select CPU_SA1100
693
	select GENERIC_CLOCKEVENTS
694
	select HAVE_IDE
695
	select ISA
696
	select NEED_MACH_MEMORY_H
697
	select SPARSE_IRQ
698 699
	help
	  Support for StrongARM 11x0 based boards.
L
Linus Torvalds 已提交
700

701 702
config ARCH_S3C24XX
	bool "Samsung S3C24XX SoCs"
B
Ben Dooks 已提交
703
	select ARCH_HAS_CPUFREQ
704
	select ARCH_REQUIRE_GPIOLIB
705
	select CLKDEV_LOOKUP
706
	select CLKSRC_SAMSUNG_PWM
707
	select GENERIC_CLOCKEVENTS
708
	select GPIO_SAMSUNG
709
	select HAVE_S3C2410_I2C if I2C
710
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
711
	select HAVE_S3C_RTC if RTC_CLASS
712
	select MULTI_IRQ_HANDLER
713
	select NEED_MACH_GPIO_H
714
	select NEED_MACH_IO_H
715
	select SAMSUNG_ATAGS
L
Linus Torvalds 已提交
716
	help
717 718 719 720
	  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).
721

B
Ben Dooks 已提交
722 723
config ARCH_S3C64XX
	bool "Samsung S3C64XX"
724 725
	select ARCH_HAS_CPUFREQ
	select ARCH_REQUIRE_GPIOLIB
726
	select ARM_VIC
727
	select CLKDEV_LOOKUP
728
	select CLKSRC_SAMSUNG_PWM
729
	select COMMON_CLK
730
	select CPU_V6
731
	select GENERIC_CLOCKEVENTS
732
	select GPIO_SAMSUNG
733 734
	select HAVE_S3C2410_I2C if I2C
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
M
Mark Brown 已提交
735
	select HAVE_TCM
736
	select NEED_MACH_GPIO_H
737
	select NO_IOPORT
738
	select PLAT_SAMSUNG
739
	select PM_GENERIC_DOMAINS
740 741
	select S3C_DEV_NAND
	select S3C_GPIO_TRACK
742
	select SAMSUNG_ATAGS
743
	select SAMSUNG_GPIOLIB_4BIT
744
	select SAMSUNG_WAKEMASK
745
	select SAMSUNG_WDT_RESET
746
	select USB_ARCH_HAS_OHCI
B
Ben Dooks 已提交
747 748 749
	help
	  Samsung S3C64XX series based systems

750 751
config ARCH_S5P64X0
	bool "Samsung S5P6440 S5P6450"
752
	select CLKDEV_LOOKUP
753
	select CLKSRC_SAMSUNG_PWM
754
	select CPU_V6
755
	select GENERIC_CLOCKEVENTS
756
	select GPIO_SAMSUNG
757
	select HAVE_S3C2410_I2C if I2C
758
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
759
	select HAVE_S3C_RTC if RTC_CLASS
760
	select NEED_MACH_GPIO_H
761
	select SAMSUNG_ATAGS
R
Russell King 已提交
762
	select SAMSUNG_WDT_RESET
763
	help
764 765
	  Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
	  SMDK6450.
766

767 768
config ARCH_S5PC100
	bool "Samsung S5PC100"
769
	select ARCH_REQUIRE_GPIOLIB
770
	select CLKDEV_LOOKUP
771
	select CLKSRC_SAMSUNG_PWM
772
	select CPU_V7
773
	select GENERIC_CLOCKEVENTS
774
	select GPIO_SAMSUNG
775
	select HAVE_S3C2410_I2C if I2C
776
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
777
	select HAVE_S3C_RTC if RTC_CLASS
778
	select NEED_MACH_GPIO_H
779
	select SAMSUNG_ATAGS
R
Russell King 已提交
780
	select SAMSUNG_WDT_RESET
781
	help
782
	  Samsung S5PC100 series based systems
783

784 785
config ARCH_S5PV210
	bool "Samsung S5PV210/S5PC110"
786
	select ARCH_HAS_CPUFREQ
787
	select ARCH_HAS_HOLES_MEMORYMODEL
788
	select ARCH_SPARSEMEM_ENABLE
789
	select CLKDEV_LOOKUP
790
	select CLKSRC_SAMSUNG_PWM
791
	select CPU_V7
792
	select GENERIC_CLOCKEVENTS
793
	select GPIO_SAMSUNG
794
	select HAVE_S3C2410_I2C if I2C
795
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
796
	select HAVE_S3C_RTC if RTC_CLASS
797
	select NEED_MACH_GPIO_H
798
	select NEED_MACH_MEMORY_H
799
	select SAMSUNG_ATAGS
800 801 802
	help
	  Samsung S5PV210/S5PC110 series based systems

803
config ARCH_EXYNOS
804
	bool "Samsung EXYNOS"
805
	select ARCH_HAS_CPUFREQ
806
	select ARCH_HAS_HOLES_MEMORYMODEL
807
	select ARCH_REQUIRE_GPIOLIB
808
	select ARCH_SPARSEMEM_ENABLE
809
	select ARM_GIC
810
	select COMMON_CLK
811
	select CPU_V7
812
	select GENERIC_CLOCKEVENTS
813
	select HAVE_S3C2410_I2C if I2C
814
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
815
	select HAVE_S3C_RTC if RTC_CLASS
816
	select NEED_MACH_MEMORY_H
817
	select SPARSE_IRQ
818
	select USE_OF
819
	help
820
	  Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
821

822 823
config ARCH_DAVINCI
	bool "TI DaVinci"
824
	select ARCH_HAS_HOLES_MEMORYMODEL
825
	select ARCH_REQUIRE_GPIOLIB
826
	select CLKDEV_LOOKUP
D
David Brownell 已提交
827
	select GENERIC_ALLOCATOR
828
	select GENERIC_CLOCKEVENTS
R
Russell King 已提交
829
	select GENERIC_IRQ_CHIP
830
	select HAVE_IDE
831
	select TI_PRIV_EDMA
832
	select USE_OF
833
	select ZONE_DMA
834 835 836
	help
	  Support for TI's DaVinci platform.

837 838
config ARCH_OMAP1
	bool "TI OMAP1"
A
Arnd Bergmann 已提交
839
	depends on MMU
840
	select ARCH_HAS_CPUFREQ
841
	select ARCH_HAS_HOLES_MEMORYMODEL
842
	select ARCH_OMAP
843
	select ARCH_REQUIRE_GPIOLIB
844
	select CLKDEV_LOOKUP
845
	select CLKSRC_MMIO
846
	select GENERIC_CLOCKEVENTS
847 848 849 850 851
	select GENERIC_IRQ_CHIP
	select HAVE_IDE
	select IRQ_DOMAIN
	select NEED_MACH_IO_H if PCCARD
	select NEED_MACH_MEMORY_H
852
	help
853
	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
854

L
Linus Torvalds 已提交
855 856
endchoice

R
Rob Herring 已提交
857 858 859 860 861 862 863 864
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
865
	select ARCH_MULTI_V4_V5
866 867 868
	select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
		CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
		CPU_ARM925T || CPU_ARM940T)
R
Rob Herring 已提交
869 870 871 872

config ARCH_MULTI_V5
	bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
	depends on !ARCH_MULTI_V6_V7
873
	select ARCH_MULTI_V4_V5
874 875 876
	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
877 878 879 880 881

config ARCH_MULTI_V4_V5
	bool

config ARCH_MULTI_V6
882
	bool "ARMv6 based platforms (ARM11)"
R
Rob Herring 已提交
883
	select ARCH_MULTI_V6_V7
884
	select CPU_V6
R
Rob Herring 已提交
885 886

config ARCH_MULTI_V7
887
	bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
R
Rob Herring 已提交
888 889
	default y
	select ARCH_MULTI_V6_V7
890
	select CPU_V7
R
Rob Herring 已提交
891 892 893 894 895 896 897 898 899 900

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

901 902 903 904 905
#
# 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.
#
906 907
source "arch/arm/mach-mvebu/Kconfig"

908 909
source "arch/arm/mach-at91/Kconfig"

910 911
source "arch/arm/mach-bcm/Kconfig"

912 913
source "arch/arm/mach-bcm2835/Kconfig"

L
Linus Torvalds 已提交
914 915
source "arch/arm/mach-clps711x/Kconfig"

916 917
source "arch/arm/mach-cns3xxx/Kconfig"

918 919 920 921
source "arch/arm/mach-davinci/Kconfig"

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

922 923
source "arch/arm/mach-ep93xx/Kconfig"

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

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

R
Rob Herring 已提交
928 929
source "arch/arm/mach-highbank/Kconfig"

L
Linus Torvalds 已提交
930 931
source "arch/arm/mach-integrator/Kconfig"

932 933 934
source "arch/arm/mach-iop32x/Kconfig"

source "arch/arm/mach-iop33x/Kconfig"
L
Linus Torvalds 已提交
935

936 937
source "arch/arm/mach-iop13xx/Kconfig"

L
Linus Torvalds 已提交
938 939
source "arch/arm/mach-ixp4xx/Kconfig"

940 941
source "arch/arm/mach-keystone/Kconfig"

942 943 944 945 946 947
source "arch/arm/mach-kirkwood/Kconfig"

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

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

948 949
source "arch/arm/mach-mv78xx0/Kconfig"

S
Shawn Guo 已提交
950
source "arch/arm/mach-imx/Kconfig"
L
Linus Torvalds 已提交
951

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

954
source "arch/arm/mach-netx/Kconfig"
955

956 957
source "arch/arm/mach-nomadik/Kconfig"

D
Daniel Tang 已提交
958 959
source "arch/arm/mach-nspire/Kconfig"

960 961 962
source "arch/arm/plat-omap/Kconfig"

source "arch/arm/mach-omap1/Kconfig"
L
Linus Torvalds 已提交
963

964 965
source "arch/arm/mach-omap2/Kconfig"

966
source "arch/arm/mach-orion5x/Kconfig"
967

R
Rob Herring 已提交
968 969
source "arch/arm/mach-picoxcell/Kconfig"

970 971
source "arch/arm/mach-pxa/Kconfig"
source "arch/arm/plat-pxa/Kconfig"
972

973 974 975 976
source "arch/arm/mach-mmp/Kconfig"

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

977 978
source "arch/arm/mach-rockchip/Kconfig"

979
source "arch/arm/mach-sa1100/Kconfig"
980

981
source "arch/arm/plat-samsung/Kconfig"
982

R
Rob Herring 已提交
983 984
source "arch/arm/mach-socfpga/Kconfig"

985
source "arch/arm/mach-spear/Kconfig"
986

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

989
source "arch/arm/mach-s3c24xx/Kconfig"
L
Linus Torvalds 已提交
990

991
source "arch/arm/mach-s3c64xx/Kconfig"
B
Ben Dooks 已提交
992

993
source "arch/arm/mach-s5p64x0/Kconfig"
994

995 996
source "arch/arm/mach-s5pc100/Kconfig"

997 998
source "arch/arm/mach-s5pv210/Kconfig"

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

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

1003 1004
source "arch/arm/mach-sunxi/Kconfig"

1005 1006
source "arch/arm/mach-prima2/Kconfig"

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

1009
source "arch/arm/mach-u300/Kconfig"
L
Linus Torvalds 已提交
1010

1011
source "arch/arm/mach-ux500/Kconfig"
L
Linus Torvalds 已提交
1012 1013 1014

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

1015
source "arch/arm/mach-vexpress/Kconfig"
1016
source "arch/arm/plat-versatile/Kconfig"
1017

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

1020 1021
source "arch/arm/mach-vt8500/Kconfig"

1022 1023
source "arch/arm/mach-w90x900/Kconfig"

1024 1025
source "arch/arm/mach-zynq/Kconfig"

L
Linus Torvalds 已提交
1026 1027 1028 1029
# Definitions to make life easier
config ARCH_ACORN
	bool

1030 1031
config PLAT_IOP
	bool
M
Mikael Pettersson 已提交
1032
	select GENERIC_CLOCKEVENTS
1033

L
Lennert Buytenhek 已提交
1034 1035
config PLAT_ORION
	bool
1036
	select CLKSRC_MMIO
1037
	select COMMON_CLK
R
Russell King 已提交
1038
	select GENERIC_IRQ_CHIP
1039
	select IRQ_DOMAIN
L
Lennert Buytenhek 已提交
1040

1041 1042 1043 1044
config PLAT_ORION_LEGACY
	bool
	select PLAT_ORION

1045 1046 1047
config PLAT_PXA
	bool

1048 1049 1050
config PLAT_VERSATILE
	bool

1051 1052
config ARM_TIMER_SP804
	bool
1053
	select CLKSRC_MMIO
1054
	select CLKSRC_OF if OF
1055

L
Linus Torvalds 已提交
1056 1057
source arch/arm/mm/Kconfig

1058 1059 1060 1061 1062
config ARM_NR_BANKS
	int
	default 16 if ARCH_EP93XX
	default 8

1063
config IWMMXT
1064
	bool "Enable iWMMXt support" if !CPU_PJ4
1065
	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
1066
	default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4
1067 1068 1069 1070
	help
	  Enable support for iWMMXt context switching at run time if
	  running on a CPU that supports it.

1071 1072 1073 1074 1075
config MULTI_IRQ_HANDLER
	bool
	help
	  Allow each machine to specify it's own IRQ handler at run time.

1076 1077 1078 1079
if !MMU
source "arch/arm/Kconfig-nommu"
endif

1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093
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

1094 1095 1096 1097 1098 1099 1100 1101 1102
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.

1103 1104
config ARM_ERRATA_411920
	bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1105
	depends on CPU_V6 || CPU_V6K
1106 1107 1108 1109 1110 1111
	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.

1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127
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.

1128 1129 1130
config ARM_ERRATA_458693
	bool "ARM errata: Processor deadlock when a false hazard is created"
	depends on CPU_V7
1131
	depends on !ARCH_MULTIPLATFORM
1132 1133 1134 1135 1136 1137 1138 1139 1140 1141
	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.

1142 1143 1144
config ARM_ERRATA_460075
	bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
	depends on CPU_V7
1145
	depends on !ARCH_MULTIPLATFORM
1146 1147 1148 1149 1150 1151 1152 1153 1154
	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.

1155 1156 1157
config ARM_ERRATA_742230
	bool "ARM errata: DMB operation may be faulty"
	depends on CPU_V7 && SMP
1158
	depends on !ARCH_MULTIPLATFORM
1159 1160 1161 1162 1163 1164 1165 1166 1167
	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.

1168 1169 1170
config ARM_ERRATA_742231
	bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
	depends on CPU_V7 && SMP
1171
	depends on !ARCH_MULTIPLATFORM
1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182
	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.

1183
config PL310_ERRATA_588369
1184
	bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
1185
	depends on CACHE_L2X0
1186 1187 1188 1189 1190 1191 1192 1193
	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
1194
	   invalidated as a result of these operations.
1195

1196 1197 1198 1199 1200 1201 1202 1203 1204 1205
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.

1206 1207
config ARM_ERRATA_720789
	bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1208
	depends on CPU_V7
1209 1210 1211 1212 1213 1214 1215 1216
	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.
1217

R
Russell King 已提交
1218
config PL310_ERRATA_727915
1219
	bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
R
Russell King 已提交
1220 1221 1222 1223 1224 1225 1226 1227 1228
	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.

1229 1230 1231
config ARM_ERRATA_743622
	bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
	depends on CPU_V7
1232
	depends on !ARCH_MULTIPLATFORM
1233 1234
	help
	  This option enables the workaround for the 743622 Cortex-A9
1235
	  (r2p*) erratum. Under very rare conditions, a faulty
1236 1237 1238 1239 1240 1241 1242
	  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.

1243 1244
config ARM_ERRATA_751472
	bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1245
	depends on CPU_V7
1246
	depends on !ARCH_MULTIPLATFORM
1247 1248 1249 1250 1251 1252 1253
	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.

1254 1255
config PL310_ERRATA_753970
	bool "PL310 errata: cache sync operation may be faulty"
1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268
	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.

1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279
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.

1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290
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.

1291 1292
config ARM_ERRATA_364296
	bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
1293
	depends on CPU_V6
1294 1295 1296 1297 1298 1299 1300 1301 1302
	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.

1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316
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.

1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328
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.

1329 1330 1331 1332 1333 1334 1335 1336 1337 1338
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.

1339 1340 1341 1342 1343 1344 1345 1346 1347 1348
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.

1349 1350 1351 1352 1353 1354 1355 1356 1357
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
1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375
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.

1376
# Select ISA DMA controller support
L
Linus Torvalds 已提交
1377 1378
config ISA_DMA
	bool
1379
	select ISA_DMA_API
L
Linus Torvalds 已提交
1380

1381
# Select ISA DMA interface
A
Al Viro 已提交
1382 1383 1384
config ISA_DMA_API
	bool

L
Linus Torvalds 已提交
1385
config PCI
1386
	bool "PCI support" if MIGHT_HAVE_PCI
L
Linus Torvalds 已提交
1387 1388 1389 1390 1391 1392
	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.

1393 1394 1395 1396
config PCI_DOMAINS
	bool
	depends on PCI

1397 1398 1399 1400 1401 1402
config PCI_NANOENGINE
	bool "BSE nanoEngine PCI support"
	depends on SA1100_NANOENGINE
	help
	  Enable PCI on the BSE nanoEngine board.

1403 1404 1405
config PCI_SYSCALL
	def_bool PCI

M
Mike Rapoport 已提交
1406 1407 1408 1409 1410 1411
config PCI_HOST_ITE8152
	bool
	depends on PCI && MACH_ARMCORE
	default y
	select DMABOUNCE

L
Linus Torvalds 已提交
1412
source "drivers/pci/Kconfig"
1413
source "drivers/pci/pcie/Kconfig"
L
Linus Torvalds 已提交
1414 1415 1416 1417 1418 1419 1420

source "drivers/pcmcia/Kconfig"

endmenu

menu "Kernel Features"

1421 1422 1423 1424 1425 1426 1427 1428 1429
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
1430
config SMP
1431
	bool "Symmetric Multi-Processing"
1432
	depends on CPU_V6K || CPU_V7
1433
	depends on GENERIC_CLOCKEVENTS
1434
	depends on HAVE_SMP
1435
	depends on MMU || ARM_MPU
L
Linus Torvalds 已提交
1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446
	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
1447
	  See also <file:Documentation/x86/i386/IO-APIC.txt>,
L
Linus Torvalds 已提交
1448
	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1449
	  <http://tldp.org/HOWTO/SMP-HOWTO.html>.
L
Linus Torvalds 已提交
1450 1451 1452

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

1453 1454
config SMP_ON_UP
	bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1455
	depends on SMP && !XIP_KERNEL && MMU
1456 1457 1458 1459 1460 1461 1462 1463 1464
	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.

1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489
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.

1490 1491 1492 1493 1494
config HAVE_ARM_SCU
	bool
	help
	  This option enables support for the ARM system coherency unit

1495
config HAVE_ARM_ARCH_TIMER
1496 1497
	bool "Architected timer support"
	depends on CPU_V7
1498
	select ARM_ARCH_TIMER
1499
	select GENERIC_CLOCKEVENTS
1500 1501 1502
	help
	  This option enables support for the ARM architected timer

1503 1504 1505
config HAVE_ARM_TWD
	bool
	depends on SMP
1506
	select CLKSRC_OF if OF
1507 1508 1509
	help
	  This options enables support for the ARM timer and watchdog unit

1510 1511 1512 1513 1514 1515 1516 1517
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
1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535
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 CPU_PM
	select ARM_CPU_SUSPEND
	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.

1536 1537 1538 1539 1540 1541 1542 1543
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.

1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566
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
1567 1568 1569 1570 1571 1572
config NR_CPUS
	int "Maximum number of CPUs (2-32)"
	range 2 32
	depends on SMP
	default "4"

1573
config HOTPLUG_CPU
1574
	bool "Support for hot-pluggable CPUs"
1575
	depends on SMP
1576 1577 1578 1579
	help
	  Say Y here to experiment with turning CPUs off and on.  CPUs
	  can be controlled through /sys/devices/system/cpu.

1580 1581 1582 1583 1584 1585 1586 1587 1588 1589
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").

1590 1591 1592
# 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.
1593 1594
config ARCH_NR_GPIO
	int
1595
	default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
1596
	default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || SOC_DRA7XX
1597
	default 392 if ARCH_U8500
1598 1599
	default 352 if ARCH_VT8500
	default 288 if ARCH_SUNXI
1600
	default 264 if MACH_H4700
1601 1602 1603 1604 1605 1606
	default 0
	help
	  Maximum number of GPIOs in the system.

	  If unsure, leave the default value.

1607
source kernel/Kconfig.preempt
L
Linus Torvalds 已提交
1608

R
Russell King 已提交
1609
config HZ_FIXED
1610
	int
1611
	default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
K
Kukjin Kim 已提交
1612
		ARCH_S5PV210 || ARCH_EXYNOS4
1613
	default AT91_TIMER_HZ if ARCH_AT91
1614
	default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
R
Russell King 已提交
1615
	default 0
R
Russell King 已提交
1616 1617

choice
R
Russell King 已提交
1618
	depends on HZ_FIXED = 0
R
Russell King 已提交
1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642
	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
1643
	default HZ_FIXED if HZ_FIXED != 0
R
Russell King 已提交
1644 1645 1646 1647 1648 1649 1650 1651 1652
	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
1653

1654 1655 1656
config SCHED_HRTICK
	def_bool HIGH_RES_TIMERS

1657
config THUMB2_KERNEL
1658
	bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
1659
	depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
1660
	default y if CPU_THUMBONLY
1661 1662
	select AEABI
	select ARM_ASM_UNIFIED
1663
	select ARM_UNWIND
1664 1665 1666 1667 1668 1669 1670
	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.

1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701
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.

1702 1703 1704
config ARM_ASM_UNIFIED
	bool

1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719
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.

1720
config OABI_COMPAT
1721
	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1722
	depends on AEABI && !THUMB2_KERNEL
1723 1724 1725 1726 1727 1728 1729
	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.
1730 1731 1732 1733 1734

	  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.

1735 1736 1737 1738
	  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
1739
	  at all). If in doubt say N.
1740

1741
config ARCH_HAS_HOLES_MEMORYMODEL
1742 1743
	bool

1744 1745 1746
config ARCH_SPARSEMEM_ENABLE
	bool

1747 1748 1749
config ARCH_SPARSEMEM_DEFAULT
	def_bool ARCH_SPARSEMEM_ENABLE

1750
config ARCH_SELECT_MEMORY_MODEL
R
Russell King 已提交
1751
	def_bool ARCH_SPARSEMEM_ENABLE
Y
Yasunori Goto 已提交
1752

1753 1754 1755
config HAVE_ARCH_PFN_VALID
	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM

N
Nicolas Pitre 已提交
1756
config HIGHMEM
1757 1758
	bool "High Memory Support"
	depends on MMU
N
Nicolas Pitre 已提交
1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772
	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
1773 1774 1775 1776
config HIGHPTE
	bool "Allocate 2nd-level pagetables from highmem"
	depends on HIGHMEM

1777 1778
config HW_PERF_EVENTS
	bool "Enable hardware performance counter support for perf events"
1779
	depends on PERF_EVENTS
1780 1781 1782 1783 1784
	default y
	help
	  Enable hardware performance counter support for perf events. If
	  disabled, perf events will use software events only.

1785 1786 1787 1788
config SYS_SUPPORTS_HUGETLBFS
       def_bool y
       depends on ARM_LPAE

1789 1790 1791 1792
config HAVE_ARCH_TRANSPARENT_HUGEPAGE
       def_bool y
       depends on ARM_LPAE

1793 1794 1795
config ARCH_WANT_GENERAL_HUGETLB
	def_bool y

1796 1797
source "mm/Kconfig"

1798 1799 1800
config FORCE_MAX_ZONEORDER
	int "Maximum zone order" if ARCH_SHMOBILE
	range 11 64 if ARCH_SHMOBILE
1801
	default "12" if SOC_AM33XX
1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814
	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
1815 1816
config ALIGNMENT_TRAP
	bool
1817
	depends on CPU_CP15_MMU
L
Linus Torvalds 已提交
1818
	default y if !ARCH_EBSA110
1819
	select HAVE_PROC_CPU if PROC_FS
L
Linus Torvalds 已提交
1820
	help
1821
	  ARM processors cannot fetch/store information which is not
L
Linus Torvalds 已提交
1822 1823 1824 1825 1826 1827 1828
	  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.

1829
config UACCESS_WITH_MEMCPY
1830 1831
	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
	depends on MMU
1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844
	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
1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858
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.

1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870
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.

S
Stefano Stabellini 已提交
1871 1872 1873 1874 1875 1876
config SWIOTLB
	def_bool y

config IOMMU_HELPER
	def_bool SWIOTLB

1877 1878 1879 1880 1881 1882
config XEN_DOM0
	def_bool y
	depends on XEN

config XEN
	bool "Xen guest support on ARM (EXPERIMENTAL)"
1883
	depends on ARM && AEABI && OF
1884
	depends on CPU_V7 && !CPU_V6
1885
	depends on !GENERIC_ATOMIC64
1886
	select ARM_PSCI
1887
	select SWIOTLB_XEN
1888 1889 1890
	help
	  Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.

L
Linus Torvalds 已提交
1891 1892 1893 1894
endmenu

menu "Boot options"

G
Grant Likely 已提交
1895 1896
config USE_OF
	bool "Flattened Device Tree support"
1897
	select IRQ_DOMAIN
G
Grant Likely 已提交
1898 1899 1900 1901 1902
	select OF
	select OF_EARLY_FLATTREE
	help
	  Include support for flattened device tree machine descriptions.

1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919
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
1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936
# 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
1937 1938 1939 1940 1941 1942
	  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
1943 1944 1945 1946 1947 1948 1949 1950 1951 1952

	  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.

1953 1954
choice
	prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1955
	depends on ZBOOT_ROM && ARCH_SH7372
1956 1957 1958
	default ZBOOT_ROM_NONE
	help
	  Include experimental SD/MMC loading code in the ROM-able zImage.
M
Masanari Iida 已提交
1959
	  With this enabled it is possible to write the ROM-able zImage
1960 1961
	  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
1962
	  the first part of the ROM-able zImage which in turn loads the
1963 1964 1965 1966 1967 1968 1969
	  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

1970 1971 1972
config ZBOOT_ROM_MMCIF
	bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
	help
1973 1974 1975 1976 1977 1978 1979 1980
	  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
1981

1982 1983
config ARM_APPENDED_DTB
	bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
1984
	depends on OF && !ZBOOT_ROM
1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001
	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.

2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013
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.

2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032
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
2033 2034 2035 2036 2037 2038 2039 2040 2041 2042
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).

2043 2044 2045
choice
	prompt "Kernel command line type" if CMDLINE != ""
	default CMDLINE_FROM_BOOTLOADER
2046
	depends on ATAGS
2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060

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.

2061 2062 2063 2064 2065 2066 2067
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.
2068
endchoice
2069

L
Linus Torvalds 已提交
2070 2071
config XIP_KERNEL
	bool "Kernel Execute-In-Place from ROM"
R
Rob Herring 已提交
2072
	depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
L
Linus Torvalds 已提交
2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099
	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
2100 2101
config KEXEC
	bool "Kexec system call (EXPERIMENTAL)"
2102
	depends on (!SMP || PM_SLEEP_SMP)
R
Richard Purdie 已提交
2103 2104 2105
	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
2106
	  but it is independent of the system firmware.   And like a reboot
R
Richard Purdie 已提交
2107 2108 2109 2110
	  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
2111
	  initially work for you.
R
Richard Purdie 已提交
2112

2113 2114
config ATAGS_PROC
	bool "Export atags in procfs"
2115
	depends on ATAGS && KEXEC
2116
	default y
2117 2118 2119 2120
	help
	  Should the atags used to boot the kernel be exported in an "atags"
	  file in procfs. Useful with kexec.

2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132
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

2133 2134
config AUTO_ZRELADDR
	bool "Auto calculation of the decompressed kernel image address"
2135
	depends on !ZBOOT_ROM
2136 2137 2138 2139 2140 2141 2142
	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
2143 2144
endmenu

2145
menu "CPU Power Management"
L
Linus Torvalds 已提交
2146

2147
if ARCH_HAS_CPUFREQ
L
Linus Torvalds 已提交
2148 2149 2150
source "drivers/cpufreq/Kconfig"
endif

2151 2152 2153 2154
source "drivers/cpuidle/Kconfig"

endmenu

L
Linus Torvalds 已提交
2155 2156 2157 2158 2159 2160
menu "Floating point emulation"

comment "At least one emulation must be selected"

config FPE_NWFPE
	bool "NWFPE math emulation"
2161
	depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
L
Linus Torvalds 已提交
2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172
	---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"
2173
	depends on FPE_NWFPE
L
Linus Torvalds 已提交
2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184
	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)"
2185
	depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
L
Linus Torvalds 已提交
2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198
	---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"
2199
	depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
L
Linus Torvalds 已提交
2200 2201 2202 2203 2204 2205 2206 2207 2208
	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.

2209 2210 2211 2212 2213
config VFPv3
	bool
	depends on VFP
	default y if CPU_V7

2214 2215 2216 2217 2218 2219 2220
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.

2221 2222
config KERNEL_MODE_NEON
	bool "Support for NEON in kernel mode"
2223
	depends on NEON && AEABI
2224 2225 2226
	help
	  Say Y to include support for NEON in kernel mode.

L
Linus Torvalds 已提交
2227 2228 2229 2230 2231 2232 2233 2234
endmenu

menu "Userspace binary formats"

source "fs/Kconfig.binfmt"

config ARTHUR
	tristate "RISC OS personality"
2235
	depends on !AEABI
L
Linus Torvalds 已提交
2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246
	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
2247
source "kernel/power/Kconfig"
L
Linus Torvalds 已提交
2248

J
Johannes Berg 已提交
2249
config ARCH_SUSPEND_POSSIBLE
2250
	depends on !ARCH_S5PC100
2251
	depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
2252
		CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
J
Johannes Berg 已提交
2253 2254
	def_bool y

2255 2256 2257
config ARM_CPU_SUSPEND
	def_bool PM_SLEEP

L
Linus Torvalds 已提交
2258 2259
endmenu

2260 2261
source "net/Kconfig"

2262
source "drivers/Kconfig"
L
Linus Torvalds 已提交
2263 2264 2265 2266 2267 2268 2269 2270 2271 2272

source "fs/Kconfig"

source "arch/arm/Kconfig.debug"

source "security/Kconfig"

source "crypto/Kconfig"

source "lib/Kconfig"
2273 2274

source "arch/arm/kvm/Kconfig"