atomic64_test: simplify the #ifdef for atomic64_dec_if_positive() test
[deliverable/linux.git] / arch / arm / Kconfig
CommitLineData
1da177e4
LT
1config ARM
2 bool
3 default y
7563bbf8 4 select ARCH_HAVE_CUSTOM_GPIO_H
e17c6d56 5 select HAVE_AOUT
24056f52 6 select HAVE_DMA_API_DEBUG
d0ee9f40 7 select HAVE_IDE if PCI || ISA || PCMCIA
2dc6a016 8 select HAVE_DMA_ATTRS
c7909509 9 select HAVE_DMA_CONTIGUOUS if (CPU_V6 || CPU_V6K || CPU_V7)
2778f620 10 select HAVE_MEMBLOCK
12b824fb 11 select RTC_LIB
75e7153a 12 select SYS_SUPPORTS_APM_EMULATION
a41297a0 13 select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
7463449b 14 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
fe166148 15 select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
09f05d85 16 select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
5cbad0eb 17 select HAVE_ARCH_KGDB
0693bf68 18 select HAVE_ARCH_TRACEHOOK
856bc356 19 select HAVE_KPROBES if !XIP_KERNEL
9edddaa2 20 select HAVE_KRETPROBES if (HAVE_KPROBES)
606576ce 21 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
80be7a7f
RV
22 select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
23 select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
0e341af8 24 select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
e39f5602 25 select ARCH_BINFMT_ELF_RANDOMIZE_PIE
1fe53268 26 select HAVE_GENERIC_DMA_COHERENT
e7db7b42
AT
27 select HAVE_KERNEL_GZIP
28 select HAVE_KERNEL_LZO
6e8699f7 29 select HAVE_KERNEL_LZMA
a7f464f3 30 select HAVE_KERNEL_XZ
e360adbe 31 select HAVE_IRQ_WORK
7ada189f
JI
32 select HAVE_PERF_EVENTS
33 select PERF_USE_VMALLOC
e513f8bf 34 select HAVE_REGS_AND_STACK_ACCESS_API
e399b1a4 35 select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
ed60453f 36 select HAVE_C_RECORDMCOUNT
e2a93ecc 37 select HAVE_GENERIC_HARDIRQS
37e74beb
SB
38 select HARDIRQS_SW_RESEND
39 select GENERIC_IRQ_PROBE
25a5662a 40 select GENERIC_IRQ_SHOW
d4aa8b15
TG
41 select GENERIC_IRQ_PROBE
42 select HARDIRQS_SW_RESEND
1fb90263 43 select CPU_PM if (SUSPEND || CPU_IDLE)
e5bfb72c 44 select GENERIC_PCI_IOMAP
e47b65b0 45 select HAVE_BPF_JIT
84ec6d57 46 select GENERIC_SMP_IDLE_THREAD
3d92a71a
AMG
47 select KTIME_SCALAR
48 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
8c56cc8b
WD
49 select GENERIC_STRNCPY_FROM_USER
50 select GENERIC_STRNLEN_USER
b9a50f74 51 select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN
1da177e4
LT
52 help
53 The ARM series is a line of low-power-consumption RISC chip designs
f6c8965a 54 licensed by ARM Ltd and targeted at embedded applications and
1da177e4 55 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
f6c8965a 56 manufactured, but legacy ARM-based PC hardware remains popular in
1da177e4
LT
57 Europe. There is an ARM Linux project with a web page at
58 <http://www.arm.linux.org.uk/>.
59
74facffe
RK
60config ARM_HAS_SG_CHAIN
61 bool
62
4ce63fcd
MS
63config NEED_SG_DMA_LENGTH
64 bool
65
66config ARM_DMA_USE_IOMMU
67 select NEED_SG_DMA_LENGTH
68 select ARM_HAS_SG_CHAIN
69 bool
70
1a189b97
RK
71config HAVE_PWM
72 bool
73
0b05da72
HUK
74config MIGHT_HAVE_PCI
75 bool
76
75e7153a
RB
77config SYS_SUPPORTS_APM_EMULATION
78 bool
79
0a938b97
DB
80config GENERIC_GPIO
81 bool
0a938b97 82
bc581770
LW
83config HAVE_TCM
84 bool
85 select GENERIC_ALLOCATOR
86
e119bfff
RK
87config HAVE_PROC_CPU
88 bool
89
5ea81769
AV
90config NO_IOPORT
91 bool
5ea81769 92
1da177e4
LT
93config EISA
94 bool
95 ---help---
96 The Extended Industry Standard Architecture (EISA) bus was
97 developed as an open alternative to the IBM MicroChannel bus.
98
99 The EISA bus provided some of the features of the IBM MicroChannel
100 bus while maintaining backward compatibility with cards made for
101 the older ISA bus. The EISA bus saw limited use between 1988 and
102 1995 when it was made obsolete by the PCI bus.
103
104 Say Y here if you are building a kernel for an EISA-based machine.
105
106 Otherwise, say N.
107
108config SBUS
109 bool
110
f16fb1ec
RK
111config STACKTRACE_SUPPORT
112 bool
113 default y
114
f76e9154
NP
115config HAVE_LATENCYTOP_SUPPORT
116 bool
117 depends on !SMP
118 default y
119
f16fb1ec
RK
120config LOCKDEP_SUPPORT
121 bool
122 default y
123
7ad1bcb2
RK
124config TRACE_IRQFLAGS_SUPPORT
125 bool
126 default y
127
95c354fe
NP
128config GENERIC_LOCKBREAK
129 bool
130 default y
131 depends on SMP && PREEMPT
132
1da177e4
LT
133config RWSEM_GENERIC_SPINLOCK
134 bool
135 default y
136
137config RWSEM_XCHGADD_ALGORITHM
138 bool
139
f0d1b0b3
DH
140config ARCH_HAS_ILOG2_U32
141 bool
f0d1b0b3
DH
142
143config ARCH_HAS_ILOG2_U64
144 bool
f0d1b0b3 145
89c52ed4
BD
146config ARCH_HAS_CPUFREQ
147 bool
148 help
149 Internal node to signify that the ARCH has CPUFREQ support
150 and that the relevant menu configurations are displayed for
151 it.
152
b89c3b16
AM
153config GENERIC_HWEIGHT
154 bool
155 default y
156
1da177e4
LT
157config GENERIC_CALIBRATE_DELAY
158 bool
159 default y
160
a08b6b79
Z
161config ARCH_MAY_HAVE_PC_FDC
162 bool
163
5ac6da66
CL
164config ZONE_DMA
165 bool
5ac6da66 166
ccd7ab7f
FT
167config NEED_DMA_MAP_STATE
168 def_bool y
169
58af4a24
RH
170config ARCH_HAS_DMA_SET_COHERENT_MASK
171 bool
172
1da177e4
LT
173config GENERIC_ISA_DMA
174 bool
175
1da177e4
LT
176config FIQ
177 bool
178
13a5045d
RH
179config NEED_RET_TO_USER
180 bool
181
034d2f5a
AV
182config ARCH_MTD_XIP
183 bool
184
c760fc19
HC
185config VECTORS_BASE
186 hex
6afd6fae 187 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
c760fc19
HC
188 default DRAM_BASE if REMAP_VECTORS_TO_RAM
189 default 0x00000000
190 help
191 The base address of exception vectors.
192
dc21af99 193config ARM_PATCH_PHYS_VIRT
c1becedc
RK
194 bool "Patch physical to virtual translations at runtime" if EMBEDDED
195 default y
b511d75d 196 depends on !XIP_KERNEL && MMU
dc21af99
RK
197 depends on !ARCH_REALVIEW || !SPARSEMEM
198 help
111e9a5c
RK
199 Patch phys-to-virt and virt-to-phys translation functions at
200 boot and module load time according to the position of the
201 kernel in system memory.
dc21af99 202
111e9a5c 203 This can only be used with non-XIP MMU kernels where the base
daece596 204 of physical memory is at a 16MB boundary.
dc21af99 205
c1becedc
RK
206 Only disable this option if you know that you do not require
207 this feature (eg, building a kernel for a single machine) and
208 you need to shrink the kernel to the minimal size.
dc21af99 209
c334bc15
RH
210config NEED_MACH_IO_H
211 bool
212 help
213 Select this when mach/io.h is required to provide special
214 definitions for this platform. The need for mach/io.h should
215 be avoided when possible.
216
0cdc8b92 217config NEED_MACH_MEMORY_H
1b9f95f8
NP
218 bool
219 help
0cdc8b92
NP
220 Select this when mach/memory.h is required to provide special
221 definitions for this platform. The need for mach/memory.h should
222 be avoided when possible.
dc21af99 223
1b9f95f8 224config PHYS_OFFSET
974c0724 225 hex "Physical address of main memory" if MMU
0cdc8b92 226 depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
974c0724 227 default DRAM_BASE if !MMU
111e9a5c 228 help
1b9f95f8
NP
229 Please provide the physical address corresponding to the
230 location of main memory in your system.
cada3c08 231
87e040b6
SG
232config GENERIC_BUG
233 def_bool y
234 depends on BUG
235
1da177e4
LT
236source "init/Kconfig"
237
dc52ddc0
MH
238source "kernel/Kconfig.freezer"
239
1da177e4
LT
240menu "System Type"
241
3c427975
HC
242config MMU
243 bool "MMU-based Paged Memory Management Support"
244 default y
245 help
246 Select if you want MMU-based virtualised addressing space
247 support by paged memory management. If unsure, say 'Y'.
248
ccf50e23
RK
249#
250# The "ARM system type" choice list is ordered alphabetically by option
251# text. Please add new entries in the option alphabetic order.
252#
1da177e4
LT
253choice
254 prompt "ARM system type"
6a0e2430 255 default ARCH_VERSATILE
1da177e4 256
66314223
DN
257config ARCH_SOCFPGA
258 bool "Altera SOCFPGA family"
259 select ARCH_WANT_OPTIONAL_GPIOLIB
260 select ARM_AMBA
261 select ARM_GIC
262 select CACHE_L2X0
263 select CLKDEV_LOOKUP
264 select COMMON_CLK
265 select CPU_V7
266 select DW_APB_TIMER
267 select DW_APB_TIMER_OF
268 select GENERIC_CLOCKEVENTS
269 select GPIO_PL061 if GPIOLIB
270 select HAVE_ARM_SCU
271 select SPARSE_IRQ
272 select USE_OF
273 help
274 This enables support for Altera SOCFPGA Cyclone V platform
275
4af6fee1
DS
276config ARCH_INTEGRATOR
277 bool "ARM Ltd. Integrator family"
278 select ARM_AMBA
89c52ed4 279 select ARCH_HAS_CPUFREQ
a613163d
LW
280 select COMMON_CLK
281 select CLK_VERSATILE
9904f793 282 select HAVE_TCM
c5a0adb5 283 select ICST
13edd86d 284 select GENERIC_CLOCKEVENTS
f4b8b319 285 select PLAT_VERSATILE
c41b16f8 286 select PLAT_VERSATILE_FPGA_IRQ
c334bc15 287 select NEED_MACH_IO_H
0cdc8b92 288 select NEED_MACH_MEMORY_H
695436e3 289 select SPARSE_IRQ
3108e6ab 290 select MULTI_IRQ_HANDLER
4af6fee1
DS
291 help
292 Support for ARM's Integrator platform.
293
294config ARCH_REALVIEW
295 bool "ARM Ltd. RealView family"
296 select ARM_AMBA
6d803ba7 297 select CLKDEV_LOOKUP
aa3831cf 298 select HAVE_MACH_CLKDEV
c5a0adb5 299 select ICST
ae30ceac 300 select GENERIC_CLOCKEVENTS
eb7fffa3 301 select ARCH_WANT_OPTIONAL_GPIOLIB
f4b8b319 302 select PLAT_VERSATILE
56a34b03 303 select PLAT_VERSATILE_CLOCK
3cb5ee49 304 select PLAT_VERSATILE_CLCD
e3887714 305 select ARM_TIMER_SP804
b56ba8aa 306 select GPIO_PL061 if GPIOLIB
0cdc8b92 307 select NEED_MACH_MEMORY_H
4af6fee1
DS
308 help
309 This enables support for ARM Ltd RealView boards.
310
311config ARCH_VERSATILE
312 bool "ARM Ltd. Versatile family"
313 select ARM_AMBA
314 select ARM_VIC
6d803ba7 315 select CLKDEV_LOOKUP
aa3831cf 316 select HAVE_MACH_CLKDEV
c5a0adb5 317 select ICST
89df1272 318 select GENERIC_CLOCKEVENTS
bbeddc43 319 select ARCH_WANT_OPTIONAL_GPIOLIB
9b0f7e39 320 select NEED_MACH_IO_H if PCI
f4b8b319 321 select PLAT_VERSATILE
56a34b03 322 select PLAT_VERSATILE_CLOCK
3414ba8c 323 select PLAT_VERSATILE_CLCD
c41b16f8 324 select PLAT_VERSATILE_FPGA_IRQ
e3887714 325 select ARM_TIMER_SP804
4af6fee1
DS
326 help
327 This enables support for ARM Ltd Versatile board.
328
ceade897
RK
329config ARCH_VEXPRESS
330 bool "ARM Ltd. Versatile Express family"
331 select ARCH_WANT_OPTIONAL_GPIOLIB
332 select ARM_AMBA
333 select ARM_TIMER_SP804
6d803ba7 334 select CLKDEV_LOOKUP
d1b8a775 335 select COMMON_CLK
ceade897 336 select GENERIC_CLOCKEVENTS
ceade897 337 select HAVE_CLK
95c34f83 338 select HAVE_PATA_PLATFORM
ceade897 339 select ICST
ba81f502 340 select NO_IOPORT
ceade897 341 select PLAT_VERSATILE
0fb44b91 342 select PLAT_VERSATILE_CLCD
b2a54ff0 343 select REGULATOR_FIXED_VOLTAGE if REGULATOR
ceade897
RK
344 help
345 This enables support for the ARM Ltd Versatile Express boards.
346
8fc5ffa0
AV
347config ARCH_AT91
348 bool "Atmel AT91"
f373e8c0 349 select ARCH_REQUIRE_GPIOLIB
93686ae8 350 select HAVE_CLK
bd602995 351 select CLKDEV_LOOKUP
e261501d 352 select IRQ_DOMAIN
1ac02d79 353 select NEED_MACH_IO_H if PCCARD
4af6fee1 354 help
929e994f
NF
355 This enables support for systems based on Atmel
356 AT91RM9200 and AT91SAM9* processors.
4af6fee1 357
ccf50e23
RK
358config ARCH_BCMRING
359 bool "Broadcom BCMRING"
360 depends on MMU
361 select CPU_V6
362 select ARM_AMBA
82d63734 363 select ARM_TIMER_SP804
6d803ba7 364 select CLKDEV_LOOKUP
ccf50e23
RK
365 select GENERIC_CLOCKEVENTS
366 select ARCH_WANT_OPTIONAL_GPIOLIB
367 help
368 Support for Broadcom's BCMRing platform.
369
220e6cf7
RH
370config ARCH_HIGHBANK
371 bool "Calxeda Highbank-based"
372 select ARCH_WANT_OPTIONAL_GPIOLIB
373 select ARM_AMBA
374 select ARM_GIC
375 select ARM_TIMER_SP804
22d80379 376 select CACHE_L2X0
220e6cf7 377 select CLKDEV_LOOKUP
8d4d9f52 378 select COMMON_CLK
220e6cf7
RH
379 select CPU_V7
380 select GENERIC_CLOCKEVENTS
381 select HAVE_ARM_SCU
3b55658a 382 select HAVE_SMP
fdfa64a4 383 select SPARSE_IRQ
220e6cf7
RH
384 select USE_OF
385 help
386 Support for the Calxeda Highbank SoC based boards.
387
1da177e4 388config ARCH_CLPS711X
0e2fce59 389 bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
c750815e 390 select CPU_ARM720T
5cfc8ee0 391 select ARCH_USES_GETTIMEOFFSET
0cdc8b92 392 select NEED_MACH_MEMORY_H
f999b8bd 393 help
0e2fce59 394 Support for Cirrus Logic 711x/721x/731x based boards.
1da177e4 395
d94f944e
AV
396config ARCH_CNS3XXX
397 bool "Cavium Networks CNS3XXX family"
00d2711d 398 select CPU_V6K
d94f944e
AV
399 select GENERIC_CLOCKEVENTS
400 select ARM_GIC
ce5ea9f3 401 select MIGHT_HAVE_CACHE_L2X0
0b05da72 402 select MIGHT_HAVE_PCI
5f32f7a0 403 select PCI_DOMAINS if PCI
d94f944e
AV
404 help
405 Support for Cavium Networks CNS3XXX platform.
406
788c9700
RK
407config ARCH_GEMINI
408 bool "Cortina Systems Gemini"
409 select CPU_FA526
788c9700 410 select ARCH_REQUIRE_GPIOLIB
5cfc8ee0 411 select ARCH_USES_GETTIMEOFFSET
788c9700
RK
412 help
413 Support for the Cortina Systems Gemini family SoCs
414
3a6cb8ce
AB
415config ARCH_PRIMA2
416 bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
417 select CPU_V7
3a6cb8ce 418 select NO_IOPORT
f6387092 419 select ARCH_REQUIRE_GPIOLIB
3a6cb8ce
AB
420 select GENERIC_CLOCKEVENTS
421 select CLKDEV_LOOKUP
422 select GENERIC_IRQ_CHIP
ce5ea9f3 423 select MIGHT_HAVE_CACHE_L2X0
cbd8d842
BS
424 select PINCTRL
425 select PINCTRL_SIRF
3a6cb8ce
AB
426 select USE_OF
427 select ZONE_DMA
428 help
429 Support for CSR SiRFSoC ARM Cortex A9 Platform
430
1da177e4
LT
431config ARCH_EBSA110
432 bool "EBSA-110"
c750815e 433 select CPU_SA110
f7e68bbf 434 select ISA
c5eb2a2b 435 select NO_IOPORT
5cfc8ee0 436 select ARCH_USES_GETTIMEOFFSET
c334bc15 437 select NEED_MACH_IO_H
0cdc8b92 438 select NEED_MACH_MEMORY_H
1da177e4
LT
439 help
440 This is an evaluation board for the StrongARM processor available
f6c8965a 441 from Digital. It has limited hardware on-board, including an
1da177e4
LT
442 Ethernet interface, two PCMCIA sockets, two serial ports and a
443 parallel port.
444
e7736d47
LB
445config ARCH_EP93XX
446 bool "EP93xx-based"
c750815e 447 select CPU_ARM920T
e7736d47
LB
448 select ARM_AMBA
449 select ARM_VIC
6d803ba7 450 select CLKDEV_LOOKUP
7444a72e 451 select ARCH_REQUIRE_GPIOLIB
eb33575c 452 select ARCH_HAS_HOLES_MEMORYMODEL
5cfc8ee0 453 select ARCH_USES_GETTIMEOFFSET
5725aeae 454 select NEED_MACH_MEMORY_H
e7736d47
LB
455 help
456 This enables support for the Cirrus EP93xx series of CPUs.
457
1da177e4
LT
458config ARCH_FOOTBRIDGE
459 bool "FootBridge"
c750815e 460 select CPU_SA110
1da177e4 461 select FOOTBRIDGE
4e8d7637 462 select GENERIC_CLOCKEVENTS
d0ee9f40 463 select HAVE_IDE
c334bc15 464 select NEED_MACH_IO_H
0cdc8b92 465 select NEED_MACH_MEMORY_H
f999b8bd
MM
466 help
467 Support for systems based on the DC21285 companion chip
468 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
1da177e4 469
788c9700
RK
470config ARCH_MXC
471 bool "Freescale MXC/iMX-based"
788c9700 472 select GENERIC_CLOCKEVENTS
788c9700 473 select ARCH_REQUIRE_GPIOLIB
6d803ba7 474 select CLKDEV_LOOKUP
234b6ced 475 select CLKSRC_MMIO
8b6c44f1 476 select GENERIC_IRQ_CHIP
ffa2ea3f 477 select MULTI_IRQ_HANDLER
8842a9e2 478 select SPARSE_IRQ
3e62af82 479 select USE_OF
788c9700
RK
480 help
481 Support for Freescale MXC/iMX-based family of processors
482
1d3f33d5
SG
483config ARCH_MXS
484 bool "Freescale MXS-based"
485 select GENERIC_CLOCKEVENTS
486 select ARCH_REQUIRE_GPIOLIB
b9214b97 487 select CLKDEV_LOOKUP
5c61ddcf 488 select CLKSRC_MMIO
2664681f 489 select COMMON_CLK
6abda3e1 490 select HAVE_CLK_PREPARE
a0f5e363 491 select PINCTRL
6c4d4efb 492 select USE_OF
1d3f33d5
SG
493 help
494 Support for Freescale MXS-based family of processors
495
4af6fee1
DS
496config ARCH_NETX
497 bool "Hilscher NetX based"
234b6ced 498 select CLKSRC_MMIO
c750815e 499 select CPU_ARM926T
4af6fee1 500 select ARM_VIC
2fcfe6b8 501 select GENERIC_CLOCKEVENTS
f999b8bd 502 help
4af6fee1
DS
503 This enables support for systems based on the Hilscher NetX Soc
504
505config ARCH_H720X
506 bool "Hynix HMS720x-based"
c750815e 507 select CPU_ARM720T
4af6fee1 508 select ISA_DMA_API
5cfc8ee0 509 select ARCH_USES_GETTIMEOFFSET
4af6fee1
DS
510 help
511 This enables support for systems based on the Hynix HMS720x
512
3b938be6
RK
513config ARCH_IOP13XX
514 bool "IOP13xx-based"
515 depends on MMU
c750815e 516 select CPU_XSC3
3b938be6
RK
517 select PLAT_IOP
518 select PCI
519 select ARCH_SUPPORTS_MSI
8d5796d2 520 select VMSPLIT_1G
c334bc15 521 select NEED_MACH_IO_H
0cdc8b92 522 select NEED_MACH_MEMORY_H
13a5045d 523 select NEED_RET_TO_USER
3b938be6
RK
524 help
525 Support for Intel's IOP13XX (XScale) family of processors.
526
3f7e5815
LB
527config ARCH_IOP32X
528 bool "IOP32x-based"
a4f7e763 529 depends on MMU
c750815e 530 select CPU_XSCALE
c334bc15 531 select NEED_MACH_IO_H
13a5045d 532 select NEED_RET_TO_USER
7ae1f7ec 533 select PLAT_IOP
f7e68bbf 534 select PCI
bb2b180c 535 select ARCH_REQUIRE_GPIOLIB
f999b8bd 536 help
3f7e5815
LB
537 Support for Intel's 80219 and IOP32X (XScale) family of
538 processors.
539
540config ARCH_IOP33X
541 bool "IOP33x-based"
542 depends on MMU
c750815e 543 select CPU_XSCALE
c334bc15 544 select NEED_MACH_IO_H
13a5045d 545 select NEED_RET_TO_USER
7ae1f7ec 546 select PLAT_IOP
3f7e5815 547 select PCI
bb2b180c 548 select ARCH_REQUIRE_GPIOLIB
3f7e5815
LB
549 help
550 Support for Intel's IOP33X (XScale) family of processors.
1da177e4 551
3b938be6
RK
552config ARCH_IXP4XX
553 bool "IXP4xx-based"
a4f7e763 554 depends on MMU
58af4a24 555 select ARCH_HAS_DMA_SET_COHERENT_MASK
234b6ced 556 select CLKSRC_MMIO
c750815e 557 select CPU_XSCALE
9dde0ae3 558 select ARCH_REQUIRE_GPIOLIB
3b938be6 559 select GENERIC_CLOCKEVENTS
0b05da72 560 select MIGHT_HAVE_PCI
c334bc15 561 select NEED_MACH_IO_H
485bdde7 562 select DMABOUNCE if PCI
c4713074 563 help
3b938be6 564 Support for Intel's IXP4XX (XScale) family of processors.
c4713074 565
3e93a22b
GC
566config ARCH_MVEBU
567 bool "Marvell SOCs with Device Tree support"
568 select GENERIC_CLOCKEVENTS
569 select MULTI_IRQ_HANDLER
570 select SPARSE_IRQ
571 select CLKSRC_MMIO
572 select GENERIC_IRQ_CHIP
573 select IRQ_DOMAIN
574 select COMMON_CLK
575 help
576 Support for the Marvell SoC Family with device tree support
577
edabd38e
SB
578config ARCH_DOVE
579 bool "Marvell Dove"
7b769bb3 580 select CPU_V7
edabd38e 581 select PCI
edabd38e 582 select ARCH_REQUIRE_GPIOLIB
edabd38e 583 select GENERIC_CLOCKEVENTS
c334bc15 584 select NEED_MACH_IO_H
edabd38e
SB
585 select PLAT_ORION
586 help
587 Support for the Marvell Dove SoC 88AP510
588
651c74c7
SB
589config ARCH_KIRKWOOD
590 bool "Marvell Kirkwood"
c750815e 591 select CPU_FEROCEON
651c74c7 592 select PCI
a8865655 593 select ARCH_REQUIRE_GPIOLIB
651c74c7 594 select GENERIC_CLOCKEVENTS
c334bc15 595 select NEED_MACH_IO_H
651c74c7
SB
596 select PLAT_ORION
597 help
598 Support for the following Marvell Kirkwood series SoCs:
599 88F6180, 88F6192 and 88F6281.
600
40805949
KW
601config ARCH_LPC32XX
602 bool "NXP LPC32XX"
234b6ced 603 select CLKSRC_MMIO
40805949
KW
604 select CPU_ARM926T
605 select ARCH_REQUIRE_GPIOLIB
606 select HAVE_IDE
607 select ARM_AMBA
608 select USB_ARCH_HAS_OHCI
6d803ba7 609 select CLKDEV_LOOKUP
40805949 610 select GENERIC_CLOCKEVENTS
f5c42271 611 select USE_OF
c49a1830 612 select HAVE_PWM
40805949
KW
613 help
614 Support for the NXP LPC32XX family of processors
615
794d15b2
SS
616config ARCH_MV78XX0
617 bool "Marvell MV78xx0"
c750815e 618 select CPU_FEROCEON
794d15b2 619 select PCI
a8865655 620 select ARCH_REQUIRE_GPIOLIB
794d15b2 621 select GENERIC_CLOCKEVENTS
c334bc15 622 select NEED_MACH_IO_H
794d15b2
SS
623 select PLAT_ORION
624 help
625 Support for the following Marvell MV78xx0 series SoCs:
626 MV781x0, MV782x0.
627
9dd0b194 628config ARCH_ORION5X
585cf175
TP
629 bool "Marvell Orion"
630 depends on MMU
c750815e 631 select CPU_FEROCEON
038ee083 632 select PCI
a8865655 633 select ARCH_REQUIRE_GPIOLIB
51cbff1d 634 select GENERIC_CLOCKEVENTS
b5e12229 635 select NEED_MACH_IO_H
69b02f6a 636 select PLAT_ORION
585cf175 637 help
9dd0b194 638 Support for the following Marvell Orion 5x series SoCs:
d2b2a6bb 639 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
d323ade1 640 Orion-2 (5281), Orion-1-90 (6183).
585cf175 641
788c9700 642config ARCH_MMP
2f7e8fae 643 bool "Marvell PXA168/910/MMP2"
788c9700 644 depends on MMU
788c9700 645 select ARCH_REQUIRE_GPIOLIB
6d803ba7 646 select CLKDEV_LOOKUP
788c9700 647 select GENERIC_CLOCKEVENTS
157d2644 648 select GPIO_PXA
c24b3114 649 select IRQ_DOMAIN
788c9700 650 select PLAT_PXA
0bd86961 651 select SPARSE_IRQ
3c7241bd 652 select GENERIC_ALLOCATOR
788c9700 653 help
2f7e8fae 654 Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
788c9700
RK
655
656config ARCH_KS8695
657 bool "Micrel/Kendin KS8695"
658 select CPU_ARM922T
98830bc9 659 select ARCH_REQUIRE_GPIOLIB
5cfc8ee0 660 select ARCH_USES_GETTIMEOFFSET
0cdc8b92 661 select NEED_MACH_MEMORY_H
788c9700
RK
662 help
663 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
664 System-on-Chip devices.
665
788c9700
RK
666config ARCH_W90X900
667 bool "Nuvoton W90X900 CPU"
668 select CPU_ARM926T
c52d3d68 669 select ARCH_REQUIRE_GPIOLIB
6d803ba7 670 select CLKDEV_LOOKUP
6fa5d5f7 671 select CLKSRC_MMIO
58b5369e 672 select GENERIC_CLOCKEVENTS
788c9700 673 help
a8bc4ead 674 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
675 At present, the w90x900 has been renamed nuc900, regarding
676 the ARM series product line, you can login the following
677 link address to know more.
678
679 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
680 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
788c9700 681
c5f80065
EG
682config ARCH_TEGRA
683 bool "NVIDIA Tegra"
4073723a 684 select CLKDEV_LOOKUP
234b6ced 685 select CLKSRC_MMIO
c5f80065
EG
686 select GENERIC_CLOCKEVENTS
687 select GENERIC_GPIO
688 select HAVE_CLK
3b55658a 689 select HAVE_SMP
ce5ea9f3 690 select MIGHT_HAVE_CACHE_L2X0
c334bc15 691 select NEED_MACH_IO_H if PCI
7056d423 692 select ARCH_HAS_CPUFREQ
2c95b7e0 693 select USE_OF
c5f80065
EG
694 help
695 This enables support for NVIDIA Tegra based systems (Tegra APX,
696 Tegra 6xx and Tegra 2 series).
697
af75655c
JI
698config ARCH_PICOXCELL
699 bool "Picochip picoXcell"
700 select ARCH_REQUIRE_GPIOLIB
701 select ARM_PATCH_PHYS_VIRT
702 select ARM_VIC
703 select CPU_V6K
704 select DW_APB_TIMER
cfda5901 705 select DW_APB_TIMER_OF
af75655c
JI
706 select GENERIC_CLOCKEVENTS
707 select GENERIC_GPIO
af75655c
JI
708 select HAVE_TCM
709 select NO_IOPORT
98e27a5c 710 select SPARSE_IRQ
af75655c
JI
711 select USE_OF
712 help
713 This enables support for systems based on the Picochip picoXcell
714 family of Femtocell devices. The picoxcell support requires device tree
715 for all boards.
716
4af6fee1
DS
717config ARCH_PNX4008
718 bool "Philips Nexperia PNX4008 Mobile"
c750815e 719 select CPU_ARM926T
6d803ba7 720 select CLKDEV_LOOKUP
5cfc8ee0 721 select ARCH_USES_GETTIMEOFFSET
4af6fee1
DS
722 help
723 This enables support for Philips PNX4008 mobile platform.
724
1da177e4 725config ARCH_PXA
2c8086a5 726 bool "PXA2xx/PXA3xx-based"
a4f7e763 727 depends on MMU
034d2f5a 728 select ARCH_MTD_XIP
89c52ed4 729 select ARCH_HAS_CPUFREQ
6d803ba7 730 select CLKDEV_LOOKUP
234b6ced 731 select CLKSRC_MMIO
7444a72e 732 select ARCH_REQUIRE_GPIOLIB
981d0f39 733 select GENERIC_CLOCKEVENTS
157d2644 734 select GPIO_PXA
bd5ce433 735 select PLAT_PXA
6ac6b817 736 select SPARSE_IRQ
4e234cc0 737 select AUTO_ZRELADDR
8a97ae2f 738 select MULTI_IRQ_HANDLER
15e0d9e3 739 select ARM_CPU_SUSPEND if PM
d0ee9f40 740 select HAVE_IDE
f999b8bd 741 help
2c8086a5 742 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
1da177e4 743
788c9700
RK
744config ARCH_MSM
745 bool "Qualcomm MSM"
4b536b8d 746 select HAVE_CLK
49cbe786 747 select GENERIC_CLOCKEVENTS
923a081c 748 select ARCH_REQUIRE_GPIOLIB
bd32344a 749 select CLKDEV_LOOKUP
49cbe786 750 help
4b53eb4f
DW
751 Support for Qualcomm MSM/QSD based systems. This runs on the
752 apps processor of the MSM/QSD and depends on a shared memory
753 interface to the modem processor which runs the baseband
754 stack and controls some vital subsystems
755 (clock and power control, etc).
49cbe786 756
c793c1b0 757config ARCH_SHMOBILE
6d72ad35
PM
758 bool "Renesas SH-Mobile / R-Mobile"
759 select HAVE_CLK
5e93c6b4 760 select CLKDEV_LOOKUP
aa3831cf 761 select HAVE_MACH_CLKDEV
3b55658a 762 select HAVE_SMP
6d72ad35 763 select GENERIC_CLOCKEVENTS
ce5ea9f3 764 select MIGHT_HAVE_CACHE_L2X0
6d72ad35
PM
765 select NO_IOPORT
766 select SPARSE_IRQ
60f1435c 767 select MULTI_IRQ_HANDLER
e3e01091 768 select PM_GENERIC_DOMAINS if PM
0cdc8b92 769 select NEED_MACH_MEMORY_H
c793c1b0 770 help
6d72ad35 771 Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
c793c1b0 772
1da177e4
LT
773config ARCH_RPC
774 bool "RiscPC"
775 select ARCH_ACORN
776 select FIQ
a08b6b79 777 select ARCH_MAY_HAVE_PC_FDC
341eb781 778 select HAVE_PATA_PLATFORM
065909b9 779 select ISA_DMA_API
5ea81769 780 select NO_IOPORT
07f841b7 781 select ARCH_SPARSEMEM_ENABLE
5cfc8ee0 782 select ARCH_USES_GETTIMEOFFSET
d0ee9f40 783 select HAVE_IDE
c334bc15 784 select NEED_MACH_IO_H
0cdc8b92 785 select NEED_MACH_MEMORY_H
1da177e4
LT
786 help
787 On the Acorn Risc-PC, Linux can support the internal IDE disk and
788 CD-ROM interface, serial and parallel port, and the floppy drive.
789
790config ARCH_SA1100
791 bool "SA1100-based"
234b6ced 792 select CLKSRC_MMIO
c750815e 793 select CPU_SA1100
f7e68bbf 794 select ISA
05944d74 795 select ARCH_SPARSEMEM_ENABLE
034d2f5a 796 select ARCH_MTD_XIP
89c52ed4 797 select ARCH_HAS_CPUFREQ
1937f5b9 798 select CPU_FREQ
3e238be2 799 select GENERIC_CLOCKEVENTS
4a8f8340 800 select CLKDEV_LOOKUP
7444a72e 801 select ARCH_REQUIRE_GPIOLIB
d0ee9f40 802 select HAVE_IDE
0cdc8b92 803 select NEED_MACH_MEMORY_H
375dec92 804 select SPARSE_IRQ
f999b8bd
MM
805 help
806 Support for StrongARM 11x0 based boards.
1da177e4 807
b130d5c2
KK
808config ARCH_S3C24XX
809 bool "Samsung S3C24XX SoCs"
0a938b97 810 select GENERIC_GPIO
9d56c02a 811 select ARCH_HAS_CPUFREQ
9483a578 812 select HAVE_CLK
e83626f2 813 select CLKDEV_LOOKUP
5cfc8ee0 814 select ARCH_USES_GETTIMEOFFSET
20676c15 815 select HAVE_S3C2410_I2C if I2C
b130d5c2
KK
816 select HAVE_S3C_RTC if RTC_CLASS
817 select HAVE_S3C2410_WATCHDOG if WATCHDOG
c334bc15 818 select NEED_MACH_IO_H
1da177e4 819 help
b130d5c2
KK
820 Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
821 and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
822 (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
823 Samsung SMDK2410 development board (and derivatives).
63b1f51b 824
a08ab637
BD
825config ARCH_S3C64XX
826 bool "Samsung S3C64XX"
89f1fa08 827 select PLAT_SAMSUNG
89f0ce72 828 select CPU_V6
89f0ce72 829 select ARM_VIC
a08ab637 830 select HAVE_CLK
6700397a 831 select HAVE_TCM
226e85f4 832 select CLKDEV_LOOKUP
89f0ce72 833 select NO_IOPORT
5cfc8ee0 834 select ARCH_USES_GETTIMEOFFSET
89c52ed4 835 select ARCH_HAS_CPUFREQ
89f0ce72
BD
836 select ARCH_REQUIRE_GPIOLIB
837 select SAMSUNG_CLKSRC
838 select SAMSUNG_IRQ_VIC_TIMER
89f0ce72 839 select S3C_GPIO_TRACK
89f0ce72
BD
840 select S3C_DEV_NAND
841 select USB_ARCH_HAS_OHCI
842 select SAMSUNG_GPIOLIB_4BIT
20676c15 843 select HAVE_S3C2410_I2C if I2C
c39d8d55 844 select HAVE_S3C2410_WATCHDOG if WATCHDOG
a08ab637
BD
845 help
846 Samsung S3C64XX series based systems
847
49b7a491
KK
848config ARCH_S5P64X0
849 bool "Samsung S5P6440 S5P6450"
c4ffccdd
KK
850 select CPU_V6
851 select GENERIC_GPIO
852 select HAVE_CLK
d8b22d25 853 select CLKDEV_LOOKUP
0665ccc4 854 select CLKSRC_MMIO
c39d8d55 855 select HAVE_S3C2410_WATCHDOG if WATCHDOG
9e65bbf2 856 select GENERIC_CLOCKEVENTS
20676c15 857 select HAVE_S3C2410_I2C if I2C
754961a8 858 select HAVE_S3C_RTC if RTC_CLASS
c4ffccdd 859 help
49b7a491
KK
860 Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
861 SMDK6450.
c4ffccdd 862
acc84707
MS
863config ARCH_S5PC100
864 bool "Samsung S5PC100"
5a7652f2
BM
865 select GENERIC_GPIO
866 select HAVE_CLK
29e8eb0f 867 select CLKDEV_LOOKUP
5a7652f2 868 select CPU_V7
925c68cd 869 select ARCH_USES_GETTIMEOFFSET
20676c15 870 select HAVE_S3C2410_I2C if I2C
754961a8 871 select HAVE_S3C_RTC if RTC_CLASS
c39d8d55 872 select HAVE_S3C2410_WATCHDOG if WATCHDOG
5a7652f2 873 help
acc84707 874 Samsung S5PC100 series based systems
5a7652f2 875
170f4e42
KK
876config ARCH_S5PV210
877 bool "Samsung S5PV210/S5PC110"
878 select CPU_V7
eecb6a84 879 select ARCH_SPARSEMEM_ENABLE
0f75a96b 880 select ARCH_HAS_HOLES_MEMORYMODEL
170f4e42
KK
881 select GENERIC_GPIO
882 select HAVE_CLK
b2a9dd46 883 select CLKDEV_LOOKUP
0665ccc4 884 select CLKSRC_MMIO
d8144aea 885 select ARCH_HAS_CPUFREQ
9e65bbf2 886 select GENERIC_CLOCKEVENTS
20676c15 887 select HAVE_S3C2410_I2C if I2C
754961a8 888 select HAVE_S3C_RTC if RTC_CLASS
c39d8d55 889 select HAVE_S3C2410_WATCHDOG if WATCHDOG
0cdc8b92 890 select NEED_MACH_MEMORY_H
170f4e42
KK
891 help
892 Samsung S5PV210/S5PC110 series based systems
893
83014579
KK
894config ARCH_EXYNOS
895 bool "SAMSUNG EXYNOS"
cc0e72b8 896 select CPU_V7
f567fa6f 897 select ARCH_SPARSEMEM_ENABLE
0f75a96b 898 select ARCH_HAS_HOLES_MEMORYMODEL
cc0e72b8
CY
899 select GENERIC_GPIO
900 select HAVE_CLK
badc4f2d 901 select CLKDEV_LOOKUP
b333fb16 902 select ARCH_HAS_CPUFREQ
cc0e72b8 903 select GENERIC_CLOCKEVENTS
754961a8 904 select HAVE_S3C_RTC if RTC_CLASS
20676c15 905 select HAVE_S3C2410_I2C if I2C
c39d8d55 906 select HAVE_S3C2410_WATCHDOG if WATCHDOG
0cdc8b92 907 select NEED_MACH_MEMORY_H
cc0e72b8 908 help
83014579 909 Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
cc0e72b8 910
1da177e4
LT
911config ARCH_SHARK
912 bool "Shark"
c750815e 913 select CPU_SA110
f7e68bbf
RK
914 select ISA
915 select ISA_DMA
3bca103a 916 select ZONE_DMA
f7e68bbf 917 select PCI
5cfc8ee0 918 select ARCH_USES_GETTIMEOFFSET
0cdc8b92 919 select NEED_MACH_MEMORY_H
c334bc15 920 select NEED_MACH_IO_H
f999b8bd
MM
921 help
922 Support for the StrongARM based Digital DNARD machine, also known
923 as "Shark" (<http://www.shark-linux.de/shark.html>).
1da177e4 924
d98aac75
LW
925config ARCH_U300
926 bool "ST-Ericsson U300 Series"
927 depends on MMU
234b6ced 928 select CLKSRC_MMIO
d98aac75 929 select CPU_ARM926T
bc581770 930 select HAVE_TCM
d98aac75 931 select ARM_AMBA
5485c1e0 932 select ARM_PATCH_PHYS_VIRT
d98aac75 933 select ARM_VIC
d98aac75 934 select GENERIC_CLOCKEVENTS
6d803ba7 935 select CLKDEV_LOOKUP
50667d63 936 select COMMON_CLK
d98aac75 937 select GENERIC_GPIO
cc890cd7 938 select ARCH_REQUIRE_GPIOLIB
d98aac75
LW
939 help
940 Support for ST-Ericsson U300 series mobile platforms.
941
ccf50e23
RK
942config ARCH_U8500
943 bool "ST-Ericsson U8500 Series"
67ae14fc 944 depends on MMU
ccf50e23
RK
945 select CPU_V7
946 select ARM_AMBA
ccf50e23 947 select GENERIC_CLOCKEVENTS
6d803ba7 948 select CLKDEV_LOOKUP
94bdc0e2 949 select ARCH_REQUIRE_GPIOLIB
7c1a70e9 950 select ARCH_HAS_CPUFREQ
3b55658a 951 select HAVE_SMP
ce5ea9f3 952 select MIGHT_HAVE_CACHE_L2X0
ccf50e23
RK
953 help
954 Support for ST-Ericsson's Ux500 architecture
955
956config ARCH_NOMADIK
957 bool "STMicroelectronics Nomadik"
958 select ARM_AMBA
959 select ARM_VIC
960 select CPU_ARM926T
4a31bd28 961 select COMMON_CLK
ccf50e23 962 select GENERIC_CLOCKEVENTS
0fa7be40 963 select PINCTRL
ce5ea9f3 964 select MIGHT_HAVE_CACHE_L2X0
ccf50e23
RK
965 select ARCH_REQUIRE_GPIOLIB
966 help
967 Support for the Nomadik platform by ST-Ericsson
968
7c6337e2
KH
969config ARCH_DAVINCI
970 bool "TI DaVinci"
7c6337e2 971 select GENERIC_CLOCKEVENTS
dce1115b 972 select ARCH_REQUIRE_GPIOLIB
3bca103a 973 select ZONE_DMA
9232fcc9 974 select HAVE_IDE
6d803ba7 975 select CLKDEV_LOOKUP
20e9969b 976 select GENERIC_ALLOCATOR
dc7ad3b3 977 select GENERIC_IRQ_CHIP
ae88e05a 978 select ARCH_HAS_HOLES_MEMORYMODEL
7c6337e2
KH
979 help
980 Support for TI's DaVinci platform.
981
3b938be6
RK
982config ARCH_OMAP
983 bool "TI OMAP"
00a36698 984 depends on MMU
9483a578 985 select HAVE_CLK
7444a72e 986 select ARCH_REQUIRE_GPIOLIB
89c52ed4 987 select ARCH_HAS_CPUFREQ
354a183f 988 select CLKSRC_MMIO
06cad098 989 select GENERIC_CLOCKEVENTS
9af915da 990 select ARCH_HAS_HOLES_MEMORYMODEL
3b938be6 991 help
6e457bb0 992 Support for TI's OMAP platform (OMAP1/2/3/4).
3b938be6 993
cee37e50 994config PLAT_SPEAR
995 bool "ST SPEAr"
996 select ARM_AMBA
997 select ARCH_REQUIRE_GPIOLIB
6d803ba7 998 select CLKDEV_LOOKUP
5df33a62 999 select COMMON_CLK
d6e15d78 1000 select CLKSRC_MMIO
cee37e50 1001 select GENERIC_CLOCKEVENTS
cee37e50 1002 select HAVE_CLK
1003 help
1004 Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
1005
21f47fbc
AC
1006config ARCH_VT8500
1007 bool "VIA/WonderMedia 85xx"
1008 select CPU_ARM926T
1009 select GENERIC_GPIO
1010 select ARCH_HAS_CPUFREQ
1011 select GENERIC_CLOCKEVENTS
1012 select ARCH_REQUIRE_GPIOLIB
1013 select HAVE_PWM
1014 help
1015 Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
02c981c0 1016
b85a3ef4
JL
1017config ARCH_ZYNQ
1018 bool "Xilinx Zynq ARM Cortex A9 Platform"
02c981c0 1019 select CPU_V7
02c981c0
BD
1020 select GENERIC_CLOCKEVENTS
1021 select CLKDEV_LOOKUP
b85a3ef4
JL
1022 select ARM_GIC
1023 select ARM_AMBA
1024 select ICST
ce5ea9f3 1025 select MIGHT_HAVE_CACHE_L2X0
02c981c0 1026 select USE_OF
02c981c0 1027 help
b85a3ef4 1028 Support for Xilinx Zynq ARM Cortex A9 Platform
1da177e4
LT
1029endchoice
1030
ccf50e23
RK
1031#
1032# This is sorted alphabetically by mach-* pathname. However, plat-*
1033# Kconfigs may be included either alphabetically (according to the
1034# plat- suffix) or along side the corresponding mach-* source.
1035#
3e93a22b
GC
1036source "arch/arm/mach-mvebu/Kconfig"
1037
95b8f20f
RK
1038source "arch/arm/mach-at91/Kconfig"
1039
1040source "arch/arm/mach-bcmring/Kconfig"
1041
1da177e4
LT
1042source "arch/arm/mach-clps711x/Kconfig"
1043
d94f944e
AV
1044source "arch/arm/mach-cns3xxx/Kconfig"
1045
95b8f20f
RK
1046source "arch/arm/mach-davinci/Kconfig"
1047
1048source "arch/arm/mach-dove/Kconfig"
1049
e7736d47
LB
1050source "arch/arm/mach-ep93xx/Kconfig"
1051
1da177e4
LT
1052source "arch/arm/mach-footbridge/Kconfig"
1053
59d3a193
PZ
1054source "arch/arm/mach-gemini/Kconfig"
1055
95b8f20f
RK
1056source "arch/arm/mach-h720x/Kconfig"
1057
1da177e4
LT
1058source "arch/arm/mach-integrator/Kconfig"
1059
3f7e5815
LB
1060source "arch/arm/mach-iop32x/Kconfig"
1061
1062source "arch/arm/mach-iop33x/Kconfig"
1da177e4 1063
285f5fa7
DW
1064source "arch/arm/mach-iop13xx/Kconfig"
1065
1da177e4
LT
1066source "arch/arm/mach-ixp4xx/Kconfig"
1067
95b8f20f
RK
1068source "arch/arm/mach-kirkwood/Kconfig"
1069
1070source "arch/arm/mach-ks8695/Kconfig"
1071
95b8f20f
RK
1072source "arch/arm/mach-msm/Kconfig"
1073
794d15b2
SS
1074source "arch/arm/mach-mv78xx0/Kconfig"
1075
95b8f20f 1076source "arch/arm/plat-mxc/Kconfig"
1da177e4 1077
1d3f33d5
SG
1078source "arch/arm/mach-mxs/Kconfig"
1079
95b8f20f 1080source "arch/arm/mach-netx/Kconfig"
49cbe786 1081
95b8f20f
RK
1082source "arch/arm/mach-nomadik/Kconfig"
1083source "arch/arm/plat-nomadik/Kconfig"
1084
d48af15e
TL
1085source "arch/arm/plat-omap/Kconfig"
1086
1087source "arch/arm/mach-omap1/Kconfig"
1da177e4 1088
1dbae815
TL
1089source "arch/arm/mach-omap2/Kconfig"
1090
9dd0b194 1091source "arch/arm/mach-orion5x/Kconfig"
585cf175 1092
95b8f20f
RK
1093source "arch/arm/mach-pxa/Kconfig"
1094source "arch/arm/plat-pxa/Kconfig"
585cf175 1095
95b8f20f
RK
1096source "arch/arm/mach-mmp/Kconfig"
1097
1098source "arch/arm/mach-realview/Kconfig"
1099
1100source "arch/arm/mach-sa1100/Kconfig"
edabd38e 1101
cf383678 1102source "arch/arm/plat-samsung/Kconfig"
a21765a7
BD
1103source "arch/arm/plat-s3c24xx/Kconfig"
1104
cee37e50 1105source "arch/arm/plat-spear/Kconfig"
a21765a7 1106
85fd6d63 1107source "arch/arm/mach-s3c24xx/Kconfig"
b130d5c2 1108if ARCH_S3C24XX
a21765a7
BD
1109source "arch/arm/mach-s3c2412/Kconfig"
1110source "arch/arm/mach-s3c2440/Kconfig"
a21765a7 1111endif
1da177e4 1112
a08ab637 1113if ARCH_S3C64XX
431107ea 1114source "arch/arm/mach-s3c64xx/Kconfig"
a08ab637
BD
1115endif
1116
49b7a491 1117source "arch/arm/mach-s5p64x0/Kconfig"
c4ffccdd 1118
5a7652f2 1119source "arch/arm/mach-s5pc100/Kconfig"
5a7652f2 1120
170f4e42
KK
1121source "arch/arm/mach-s5pv210/Kconfig"
1122
83014579 1123source "arch/arm/mach-exynos/Kconfig"
cc0e72b8 1124
882d01f9 1125source "arch/arm/mach-shmobile/Kconfig"
52c543f9 1126
c5f80065
EG
1127source "arch/arm/mach-tegra/Kconfig"
1128
95b8f20f 1129source "arch/arm/mach-u300/Kconfig"
1da177e4 1130
95b8f20f 1131source "arch/arm/mach-ux500/Kconfig"
1da177e4
LT
1132
1133source "arch/arm/mach-versatile/Kconfig"
1134
ceade897 1135source "arch/arm/mach-vexpress/Kconfig"
420c34e4 1136source "arch/arm/plat-versatile/Kconfig"
ceade897 1137
21f47fbc
AC
1138source "arch/arm/mach-vt8500/Kconfig"
1139
7ec80ddf 1140source "arch/arm/mach-w90x900/Kconfig"
1141
1da177e4
LT
1142# Definitions to make life easier
1143config ARCH_ACORN
1144 bool
1145
7ae1f7ec
LB
1146config PLAT_IOP
1147 bool
469d3044 1148 select GENERIC_CLOCKEVENTS
7ae1f7ec 1149
69b02f6a
LB
1150config PLAT_ORION
1151 bool
bfe45e0b 1152 select CLKSRC_MMIO
dc7ad3b3 1153 select GENERIC_IRQ_CHIP
2f129bf4 1154 select COMMON_CLK
69b02f6a 1155
bd5ce433
EM
1156config PLAT_PXA
1157 bool
1158
f4b8b319
RK
1159config PLAT_VERSATILE
1160 bool
1161
e3887714
RK
1162config ARM_TIMER_SP804
1163 bool
bfe45e0b 1164 select CLKSRC_MMIO
a7bf6162 1165 select HAVE_SCHED_CLOCK
e3887714 1166
1da177e4
LT
1167source arch/arm/mm/Kconfig
1168
958cab0f
RK
1169config ARM_NR_BANKS
1170 int
1171 default 16 if ARCH_EP93XX
1172 default 8
1173
afe4b25e
LB
1174config IWMMXT
1175 bool "Enable iWMMXt support"
ef6c8445
HZ
1176 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
1177 default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
afe4b25e
LB
1178 help
1179 Enable support for iWMMXt context switching at run time if
1180 running on a CPU that supports it.
1181
1da177e4
LT
1182config XSCALE_PMU
1183 bool
bfc994b5 1184 depends on CPU_XSCALE
1da177e4
LT
1185 default y
1186
0f4f0672 1187config CPU_HAS_PMU
e399b1a4 1188 depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
8954bb0d 1189 (!ARCH_OMAP3 || OMAP3_EMU)
0f4f0672
JI
1190 default y
1191 bool
1192
52108641 1193config MULTI_IRQ_HANDLER
1194 bool
1195 help
1196 Allow each machine to specify it's own IRQ handler at run time.
1197
3b93e7b0
HC
1198if !MMU
1199source "arch/arm/Kconfig-nommu"
1200endif
1201
f0c4b8d6
WD
1202config ARM_ERRATA_326103
1203 bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
1204 depends on CPU_V6
1205 help
1206 Executing a SWP instruction to read-only memory does not set bit 11
1207 of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
1208 treat the access as a read, preventing a COW from occurring and
1209 causing the faulting task to livelock.
1210
9cba3ccc
CM
1211config ARM_ERRATA_411920
1212 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
e399b1a4 1213 depends on CPU_V6 || CPU_V6K
9cba3ccc
CM
1214 help
1215 Invalidation of the Instruction Cache operation can
1216 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1217 It does not affect the MPCore. This option enables the ARM Ltd.
1218 recommended workaround.
1219
7ce236fc
CM
1220config ARM_ERRATA_430973
1221 bool "ARM errata: Stale prediction on replaced interworking branch"
1222 depends on CPU_V7
1223 help
1224 This option enables the workaround for the 430973 Cortex-A8
1225 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1226 interworking branch is replaced with another code sequence at the
1227 same virtual address, whether due to self-modifying code or virtual
1228 to physical address re-mapping, Cortex-A8 does not recover from the
1229 stale interworking branch prediction. This results in Cortex-A8
1230 executing the new code sequence in the incorrect ARM or Thumb state.
1231 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1232 and also flushes the branch target cache at every context switch.
1233 Note that setting specific bits in the ACTLR register may not be
1234 available in non-secure mode.
1235
855c551f
CM
1236config ARM_ERRATA_458693
1237 bool "ARM errata: Processor deadlock when a false hazard is created"
1238 depends on CPU_V7
1239 help
1240 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1241 erratum. For very specific sequences of memory operations, it is
1242 possible for a hazard condition intended for a cache line to instead
1243 be incorrectly associated with a different cache line. This false
1244 hazard might then cause a processor deadlock. The workaround enables
1245 the L1 caching of the NEON accesses and disables the PLD instruction
1246 in the ACTLR register. Note that setting specific bits in the ACTLR
1247 register may not be available in non-secure mode.
1248
0516e464
CM
1249config ARM_ERRATA_460075
1250 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1251 depends on CPU_V7
1252 help
1253 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1254 erratum. Any asynchronous access to the L2 cache may encounter a
1255 situation in which recent store transactions to the L2 cache are lost
1256 and overwritten with stale memory contents from external memory. The
1257 workaround disables the write-allocate mode for the L2 cache via the
1258 ACTLR register. Note that setting specific bits in the ACTLR register
1259 may not be available in non-secure mode.
1260
9f05027c
WD
1261config ARM_ERRATA_742230
1262 bool "ARM errata: DMB operation may be faulty"
1263 depends on CPU_V7 && SMP
1264 help
1265 This option enables the workaround for the 742230 Cortex-A9
1266 (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1267 between two write operations may not ensure the correct visibility
1268 ordering of the two writes. This workaround sets a specific bit in
1269 the diagnostic register of the Cortex-A9 which causes the DMB
1270 instruction to behave as a DSB, ensuring the correct behaviour of
1271 the two writes.
1272
a672e99b
WD
1273config ARM_ERRATA_742231
1274 bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1275 depends on CPU_V7 && SMP
1276 help
1277 This option enables the workaround for the 742231 Cortex-A9
1278 (r2p0..r2p2) erratum. Under certain conditions, specific to the
1279 Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1280 accessing some data located in the same cache line, may get corrupted
1281 data due to bad handling of the address hazard when the line gets
1282 replaced from one of the CPUs at the same time as another CPU is
1283 accessing it. This workaround sets specific bits in the diagnostic
1284 register of the Cortex-A9 which reduces the linefill issuing
1285 capabilities of the processor.
1286
9e65582a 1287config PL310_ERRATA_588369
fa0ce403 1288 bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
2839e06c 1289 depends on CACHE_L2X0
9e65582a
SS
1290 help
1291 The PL310 L2 cache controller implements three types of Clean &
1292 Invalidate maintenance operations: by Physical Address
1293 (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1294 They are architecturally defined to behave as the execution of a
1295 clean operation followed immediately by an invalidate operation,
1296 both performing to the same memory location. This functionality
1297 is not correctly implemented in PL310 as clean lines are not
2839e06c 1298 invalidated as a result of these operations.
cdf357f1
WD
1299
1300config ARM_ERRATA_720789
1301 bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
e66dc745 1302 depends on CPU_V7
cdf357f1
WD
1303 help
1304 This option enables the workaround for the 720789 Cortex-A9 (prior to
1305 r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1306 broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1307 As a consequence of this erratum, some TLB entries which should be
1308 invalidated are not, resulting in an incoherency in the system page
1309 tables. The workaround changes the TLB flushing routines to invalidate
1310 entries regardless of the ASID.
475d92fc 1311
1f0090a1 1312config PL310_ERRATA_727915
fa0ce403 1313 bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
1f0090a1
RK
1314 depends on CACHE_L2X0
1315 help
1316 PL310 implements the Clean & Invalidate by Way L2 cache maintenance
1317 operation (offset 0x7FC). This operation runs in background so that
1318 PL310 can handle normal accesses while it is in progress. Under very
1319 rare circumstances, due to this erratum, write data can be lost when
1320 PL310 treats a cacheable write transaction during a Clean &
1321 Invalidate by Way operation.
1322
475d92fc
WD
1323config ARM_ERRATA_743622
1324 bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1325 depends on CPU_V7
1326 help
1327 This option enables the workaround for the 743622 Cortex-A9
efbc74ac 1328 (r2p*) erratum. Under very rare conditions, a faulty
475d92fc
WD
1329 optimisation in the Cortex-A9 Store Buffer may lead to data
1330 corruption. This workaround sets a specific bit in the diagnostic
1331 register of the Cortex-A9 which disables the Store Buffer
1332 optimisation, preventing the defect from occurring. This has no
1333 visible impact on the overall performance or power consumption of the
1334 processor.
1335
9a27c27c
WD
1336config ARM_ERRATA_751472
1337 bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
ba90c516 1338 depends on CPU_V7
9a27c27c
WD
1339 help
1340 This option enables the workaround for the 751472 Cortex-A9 (prior
1341 to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1342 completion of a following broadcasted operation if the second
1343 operation is received by a CPU before the ICIALLUIS has completed,
1344 potentially leading to corrupted entries in the cache or TLB.
1345
fa0ce403
WD
1346config PL310_ERRATA_753970
1347 bool "PL310 errata: cache sync operation may be faulty"
885028e4
SK
1348 depends on CACHE_PL310
1349 help
1350 This option enables the workaround for the 753970 PL310 (r3p0) erratum.
1351
1352 Under some condition the effect of cache sync operation on
1353 the store buffer still remains when the operation completes.
1354 This means that the store buffer is always asked to drain and
1355 this prevents it from merging any further writes. The workaround
1356 is to replace the normal offset of cache sync operation (0x730)
1357 by another offset targeting an unmapped PL310 register 0x740.
1358 This has the same effect as the cache sync operation: store buffer
1359 drain and waiting for all buffers empty.
1360
fcbdc5fe
WD
1361config ARM_ERRATA_754322
1362 bool "ARM errata: possible faulty MMU translations following an ASID switch"
1363 depends on CPU_V7
1364 help
1365 This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1366 r3p*) erratum. A speculative memory access may cause a page table walk
1367 which starts prior to an ASID switch but completes afterwards. This
1368 can populate the micro-TLB with a stale entry which may be hit with
1369 the new ASID. This workaround places two dsb instructions in the mm
1370 switching code so that no page table walks can cross the ASID switch.
1371
5dab26af
WD
1372config ARM_ERRATA_754327
1373 bool "ARM errata: no automatic Store Buffer drain"
1374 depends on CPU_V7 && SMP
1375 help
1376 This option enables the workaround for the 754327 Cortex-A9 (prior to
1377 r2p0) erratum. The Store Buffer does not have any automatic draining
1378 mechanism and therefore a livelock may occur if an external agent
1379 continuously polls a memory location waiting to observe an update.
1380 This workaround defines cpu_relax() as smp_mb(), preventing correctly
1381 written polling loops from denying visibility of updates to memory.
1382
145e10e1
CM
1383config ARM_ERRATA_364296
1384 bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
1385 depends on CPU_V6 && !SMP
1386 help
1387 This options enables the workaround for the 364296 ARM1136
1388 r0p2 erratum (possible cache data corruption with
1389 hit-under-miss enabled). It sets the undocumented bit 31 in
1390 the auxiliary control register and the FI bit in the control
1391 register, thus disabling hit-under-miss without putting the
1392 processor into full low interrupt latency mode. ARM11MPCore
1393 is not affected.
1394
f630c1bd
WD
1395config ARM_ERRATA_764369
1396 bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1397 depends on CPU_V7 && SMP
1398 help
1399 This option enables the workaround for erratum 764369
1400 affecting Cortex-A9 MPCore with two or more processors (all
1401 current revisions). Under certain timing circumstances, a data
1402 cache line maintenance operation by MVA targeting an Inner
1403 Shareable memory region may fail to proceed up to either the
1404 Point of Coherency or to the Point of Unification of the
1405 system. This workaround adds a DSB instruction before the
1406 relevant cache maintenance functions and sets a specific bit
1407 in the diagnostic control register of the SCU.
1408
11ed0ba1
WD
1409config PL310_ERRATA_769419
1410 bool "PL310 errata: no automatic Store Buffer drain"
1411 depends on CACHE_L2X0
1412 help
1413 On revisions of the PL310 prior to r3p2, the Store Buffer does
1414 not automatically drain. This can cause normal, non-cacheable
1415 writes to be retained when the memory system is idle, leading
1416 to suboptimal I/O performance for drivers using coherent DMA.
1417 This option adds a write barrier to the cpu_idle loop so that,
1418 on systems with an outer cache, the store buffer is drained
1419 explicitly.
1420
1da177e4
LT
1421endmenu
1422
1423source "arch/arm/common/Kconfig"
1424
1da177e4
LT
1425menu "Bus support"
1426
1427config ARM_AMBA
1428 bool
1429
1430config ISA
1431 bool
1da177e4
LT
1432 help
1433 Find out whether you have ISA slots on your motherboard. ISA is the
1434 name of a bus system, i.e. the way the CPU talks to the other stuff
1435 inside your box. Other bus systems are PCI, EISA, MicroChannel
1436 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1437 newer boards don't support it. If you have ISA, say Y, otherwise N.
1438
065909b9 1439# Select ISA DMA controller support
1da177e4
LT
1440config ISA_DMA
1441 bool
065909b9 1442 select ISA_DMA_API
1da177e4 1443
065909b9 1444# Select ISA DMA interface
5cae841b
AV
1445config ISA_DMA_API
1446 bool
5cae841b 1447
1da177e4 1448config PCI
0b05da72 1449 bool "PCI support" if MIGHT_HAVE_PCI
1da177e4
LT
1450 help
1451 Find out whether you have a PCI motherboard. PCI is the name of a
1452 bus system, i.e. the way the CPU talks to the other stuff inside
1453 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1454 VESA. If you have PCI, say Y, otherwise N.
1455
52882173
AV
1456config PCI_DOMAINS
1457 bool
1458 depends on PCI
1459
b080ac8a
MRJ
1460config PCI_NANOENGINE
1461 bool "BSE nanoEngine PCI support"
1462 depends on SA1100_NANOENGINE
1463 help
1464 Enable PCI on the BSE nanoEngine board.
1465
36e23590
MW
1466config PCI_SYSCALL
1467 def_bool PCI
1468
1da177e4
LT
1469# Select the host bridge type
1470config PCI_HOST_VIA82C505
1471 bool
1472 depends on PCI && ARCH_SHARK
1473 default y
1474
a0113a99
MR
1475config PCI_HOST_ITE8152
1476 bool
1477 depends on PCI && MACH_ARMCORE
1478 default y
1479 select DMABOUNCE
1480
1da177e4
LT
1481source "drivers/pci/Kconfig"
1482
1483source "drivers/pcmcia/Kconfig"
1484
1485endmenu
1486
1487menu "Kernel Features"
1488
3b55658a
DM
1489config HAVE_SMP
1490 bool
1491 help
1492 This option should be selected by machines which have an SMP-
1493 capable CPU.
1494
1495 The only effect of this option is to make the SMP-related
1496 options available to the user for configuration.
1497
1da177e4 1498config SMP
bb2d8130 1499 bool "Symmetric Multi-Processing"
fbb4ddac 1500 depends on CPU_V6K || CPU_V7
bc28248e 1501 depends on GENERIC_CLOCKEVENTS
3b55658a 1502 depends on HAVE_SMP
9934ebb8 1503 depends on MMU
f6dd9fa5 1504 select USE_GENERIC_SMP_HELPERS
89c3dedf 1505 select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
1da177e4
LT
1506 help
1507 This enables support for systems with more than one CPU. If you have
1508 a system with only one CPU, like most personal computers, say N. If
1509 you have a system with more than one CPU, say Y.
1510
1511 If you say N here, the kernel will run on single and multiprocessor
1512 machines, but will use only one CPU of a multiprocessor machine. If
1513 you say Y here, the kernel will run on many, but not all, single
1514 processor machines. On a single processor machine, the kernel will
1515 run faster if you say N here.
1516
395cf969 1517 See also <file:Documentation/x86/i386/IO-APIC.txt>,
1da177e4 1518 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
50a23e6e 1519 <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1da177e4
LT
1520
1521 If you don't know what to do here, say N.
1522
f00ec48f
RK
1523config SMP_ON_UP
1524 bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1525 depends on EXPERIMENTAL
4d2692a7 1526 depends on SMP && !XIP_KERNEL
f00ec48f
RK
1527 default y
1528 help
1529 SMP kernels contain instructions which fail on non-SMP processors.
1530 Enabling this option allows the kernel to modify itself to make
1531 these instructions safe. Disabling it allows about 1K of space
1532 savings.
1533
1534 If you don't know what to do here, say Y.
1535
c9018aab
VG
1536config ARM_CPU_TOPOLOGY
1537 bool "Support cpu topology definition"
1538 depends on SMP && CPU_V7
1539 default y
1540 help
1541 Support ARM cpu topology definition. The MPIDR register defines
1542 affinity between processors which is then used to describe the cpu
1543 topology of an ARM System.
1544
1545config SCHED_MC
1546 bool "Multi-core scheduler support"
1547 depends on ARM_CPU_TOPOLOGY
1548 help
1549 Multi-core scheduler support improves the CPU scheduler's decision
1550 making when dealing with multi-core CPU chips at a cost of slightly
1551 increased overhead in some places. If unsure say N here.
1552
1553config SCHED_SMT
1554 bool "SMT scheduler support"
1555 depends on ARM_CPU_TOPOLOGY
1556 help
1557 Improves the CPU scheduler's decision making when dealing with
1558 MultiThreading at a cost of slightly increased overhead in some
1559 places. If unsure say N here.
1560
a8cbcd92
RK
1561config HAVE_ARM_SCU
1562 bool
a8cbcd92
RK
1563 help
1564 This option enables support for the ARM system coherency unit
1565
022c03a2
MZ
1566config ARM_ARCH_TIMER
1567 bool "Architected timer support"
1568 depends on CPU_V7
1569 help
1570 This option enables support for the ARM architected timer
1571
f32f4ce2
RK
1572config HAVE_ARM_TWD
1573 bool
1574 depends on SMP
1575 help
1576 This options enables support for the ARM timer and watchdog unit
1577
8d5796d2
LB
1578choice
1579 prompt "Memory split"
1580 default VMSPLIT_3G
1581 help
1582 Select the desired split between kernel and user memory.
1583
1584 If you are not absolutely sure what you are doing, leave this
1585 option alone!
1586
1587 config VMSPLIT_3G
1588 bool "3G/1G user/kernel split"
1589 config VMSPLIT_2G
1590 bool "2G/2G user/kernel split"
1591 config VMSPLIT_1G
1592 bool "1G/3G user/kernel split"
1593endchoice
1594
1595config PAGE_OFFSET
1596 hex
1597 default 0x40000000 if VMSPLIT_1G
1598 default 0x80000000 if VMSPLIT_2G
1599 default 0xC0000000
1600
1da177e4
LT
1601config NR_CPUS
1602 int "Maximum number of CPUs (2-32)"
1603 range 2 32
1604 depends on SMP
1605 default "4"
1606
a054a811
RK
1607config HOTPLUG_CPU
1608 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1609 depends on SMP && HOTPLUG && EXPERIMENTAL
1610 help
1611 Say Y here to experiment with turning CPUs off and on. CPUs
1612 can be controlled through /sys/devices/system/cpu.
1613
37ee16ae
RK
1614config LOCAL_TIMERS
1615 bool "Use local timer interrupts"
971acb9b 1616 depends on SMP
37ee16ae 1617 default y
30d8bead 1618 select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
37ee16ae
RK
1619 help
1620 Enable support for local timers on SMP platforms, rather then the
1621 legacy IPI broadcast method. Local timers allows the system
1622 accounting to be spread across the timer interval, preventing a
1623 "thundering herd" at every timer tick.
1624
44986ab0
PDSN
1625config ARCH_NR_GPIO
1626 int
3dea19e8 1627 default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
70227a45 1628 default 355 if ARCH_U8500
9a01ec30 1629 default 264 if MACH_H4700
39f47d9f 1630 default 512 if SOC_OMAP5
44986ab0
PDSN
1631 default 0
1632 help
1633 Maximum number of GPIOs in the system.
1634
1635 If unsure, leave the default value.
1636
d45a398f 1637source kernel/Kconfig.preempt
1da177e4 1638
f8065813
RK
1639config HZ
1640 int
b130d5c2 1641 default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
a73ddc61 1642 ARCH_S5PV210 || ARCH_EXYNOS4
bfe65704 1643 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
5248c657 1644 default AT91_TIMER_HZ if ARCH_AT91
5da3e714 1645 default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
f8065813
RK
1646 default 100
1647
16c79651 1648config THUMB2_KERNEL
4a50bfe3 1649 bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
e399b1a4 1650 depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
16c79651
CM
1651 select AEABI
1652 select ARM_ASM_UNIFIED
89bace65 1653 select ARM_UNWIND
16c79651
CM
1654 help
1655 By enabling this option, the kernel will be compiled in
1656 Thumb-2 mode. A compiler/assembler that understand the unified
1657 ARM-Thumb syntax is needed.
1658
1659 If unsure, say N.
1660
6f685c5c
DM
1661config THUMB2_AVOID_R_ARM_THM_JUMP11
1662 bool "Work around buggy Thumb-2 short branch relocations in gas"
1663 depends on THUMB2_KERNEL && MODULES
1664 default y
1665 help
1666 Various binutils versions can resolve Thumb-2 branches to
1667 locally-defined, preemptible global symbols as short-range "b.n"
1668 branch instructions.
1669
1670 This is a problem, because there's no guarantee the final
1671 destination of the symbol, or any candidate locations for a
1672 trampoline, are within range of the branch. For this reason, the
1673 kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1674 relocation in modules at all, and it makes little sense to add
1675 support.
1676
1677 The symptom is that the kernel fails with an "unsupported
1678 relocation" error when loading some modules.
1679
1680 Until fixed tools are available, passing
1681 -fno-optimize-sibling-calls to gcc should prevent gcc generating
1682 code which hits this problem, at the cost of a bit of extra runtime
1683 stack usage in some cases.
1684
1685 The problem is described in more detail at:
1686 https://bugs.launchpad.net/binutils-linaro/+bug/725126
1687
1688 Only Thumb-2 kernels are affected.
1689
1690 Unless you are sure your tools don't have this problem, say Y.
1691
0becb088
CM
1692config ARM_ASM_UNIFIED
1693 bool
1694
704bdda0
NP
1695config AEABI
1696 bool "Use the ARM EABI to compile the kernel"
1697 help
1698 This option allows for the kernel to be compiled using the latest
1699 ARM ABI (aka EABI). This is only useful if you are using a user
1700 space environment that is also compiled with EABI.
1701
1702 Since there are major incompatibilities between the legacy ABI and
1703 EABI, especially with regard to structure member alignment, this
1704 option also changes the kernel syscall calling convention to
1705 disambiguate both ABIs and allow for backward compatibility support
1706 (selected with CONFIG_OABI_COMPAT).
1707
1708 To use this you need GCC version 4.0.0 or later.
1709
6c90c872 1710config OABI_COMPAT
a73a3ff1 1711 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
9bc433a1 1712 depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
6c90c872
NP
1713 default y
1714 help
1715 This option preserves the old syscall interface along with the
1716 new (ARM EABI) one. It also provides a compatibility layer to
1717 intercept syscalls that have structure arguments which layout
1718 in memory differs between the legacy ABI and the new ARM EABI
1719 (only for non "thumb" binaries). This option adds a tiny
1720 overhead to all syscalls and produces a slightly larger kernel.
1721 If you know you'll be using only pure EABI user space then you
1722 can say N here. If this option is not selected and you attempt
1723 to execute a legacy ABI binary then the result will be
1724 UNPREDICTABLE (in fact it can be predicted that it won't work
1725 at all). If in doubt say Y.
1726
eb33575c 1727config ARCH_HAS_HOLES_MEMORYMODEL
e80d6a24 1728 bool
e80d6a24 1729
05944d74
RK
1730config ARCH_SPARSEMEM_ENABLE
1731 bool
1732
07a2f737
RK
1733config ARCH_SPARSEMEM_DEFAULT
1734 def_bool ARCH_SPARSEMEM_ENABLE
1735
05944d74 1736config ARCH_SELECT_MEMORY_MODEL
be370302 1737 def_bool ARCH_SPARSEMEM_ENABLE
c80d79d7 1738
7b7bf499
WD
1739config HAVE_ARCH_PFN_VALID
1740 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1741
053a96ca 1742config HIGHMEM
e8db89a2
RK
1743 bool "High Memory Support"
1744 depends on MMU
053a96ca
NP
1745 help
1746 The address space of ARM processors is only 4 Gigabytes large
1747 and it has to accommodate user address space, kernel address
1748 space as well as some memory mapped IO. That means that, if you
1749 have a large amount of physical memory and/or IO, not all of the
1750 memory can be "permanently mapped" by the kernel. The physical
1751 memory that is not permanently mapped is called "high memory".
1752
1753 Depending on the selected kernel/user memory split, minimum
1754 vmalloc space and actual amount of RAM, you may not need this
1755 option which should result in a slightly faster kernel.
1756
1757 If unsure, say n.
1758
65cec8e3
RK
1759config HIGHPTE
1760 bool "Allocate 2nd-level pagetables from highmem"
1761 depends on HIGHMEM
65cec8e3 1762
1b8873a0
JI
1763config HW_PERF_EVENTS
1764 bool "Enable hardware performance counter support for perf events"
fe166148 1765 depends on PERF_EVENTS && CPU_HAS_PMU
1b8873a0
JI
1766 default y
1767 help
1768 Enable hardware performance counter support for perf events. If
1769 disabled, perf events will use software events only.
1770
3f22ab27
DH
1771source "mm/Kconfig"
1772
c1b2d970
MD
1773config FORCE_MAX_ZONEORDER
1774 int "Maximum zone order" if ARCH_SHMOBILE
1775 range 11 64 if ARCH_SHMOBILE
1776 default "9" if SA1111
1777 default "11"
1778 help
1779 The kernel memory allocator divides physically contiguous memory
1780 blocks into "zones", where each zone is a power of two number of
1781 pages. This option selects the largest power of two that the kernel
1782 keeps in the memory allocator. If you need to allocate very large
1783 blocks of physically contiguous memory, then you may need to
1784 increase this value.
1785
1786 This config option is actually maximum order plus one. For example,
1787 a value of 11 means that the largest free memory block is 2^10 pages.
1788
1da177e4
LT
1789config LEDS
1790 bool "Timer and CPU usage LEDs"
e055d5bf 1791 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
8c8fdbc9 1792 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1da177e4
LT
1793 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1794 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
73a59c1c 1795 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
25329671 1796 ARCH_AT91 || ARCH_DAVINCI || \
ff3042fb 1797 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1da177e4
LT
1798 help
1799 If you say Y here, the LEDs on your machine will be used
1800 to provide useful information about your current system status.
1801
1802 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1803 be able to select which LEDs are active using the options below. If
1804 you are compiling a kernel for the EBSA-110 or the LART however, the
1805 red LED will simply flash regularly to indicate that the system is
1806 still functional. It is safe to say Y here if you have a CATS
1807 system, but the driver will do nothing.
1808
1809config LEDS_TIMER
1810 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
eebdf7d7
DB
1811 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1812 || MACH_OMAP_PERSEUS2
1da177e4 1813 depends on LEDS
0567a0c0 1814 depends on !GENERIC_CLOCKEVENTS
1da177e4
LT
1815 default y if ARCH_EBSA110
1816 help
1817 If you say Y here, one of the system LEDs (the green one on the
1818 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1819 will flash regularly to indicate that the system is still
1820 operational. This is mainly useful to kernel hackers who are
1821 debugging unstable kernels.
1822
1823 The LART uses the same LED for both Timer LED and CPU usage LED
1824 functions. You may choose to use both, but the Timer LED function
1825 will overrule the CPU usage LED.
1826
1827config LEDS_CPU
1828 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
eebdf7d7
DB
1829 !ARCH_OMAP) \
1830 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1831 || MACH_OMAP_PERSEUS2
1da177e4
LT
1832 depends on LEDS
1833 help
1834 If you say Y here, the red LED will be used to give a good real
1835 time indication of CPU usage, by lighting whenever the idle task
1836 is not currently executing.
1837
1838 The LART uses the same LED for both Timer LED and CPU usage LED
1839 functions. You may choose to use both, but the Timer LED function
1840 will overrule the CPU usage LED.
1841
1842config ALIGNMENT_TRAP
1843 bool
f12d0d7c 1844 depends on CPU_CP15_MMU
1da177e4 1845 default y if !ARCH_EBSA110
e119bfff 1846 select HAVE_PROC_CPU if PROC_FS
1da177e4 1847 help
84eb8d06 1848 ARM processors cannot fetch/store information which is not
1da177e4
LT
1849 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1850 address divisible by 4. On 32-bit ARM processors, these non-aligned
1851 fetch/store instructions will be emulated in software if you say
1852 here, which has a severe performance impact. This is necessary for
1853 correct operation of some network protocols. With an IP-only
1854 configuration it is safe to say N, otherwise say Y.
1855
39ec58f3
LB
1856config UACCESS_WITH_MEMCPY
1857 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1858 depends on MMU && EXPERIMENTAL
1859 default y if CPU_FEROCEON
1860 help
1861 Implement faster copy_to_user and clear_user methods for CPU
1862 cores where a 8-word STM instruction give significantly higher
1863 memory write throughput than a sequence of individual 32bit stores.
1864
1865 A possible side effect is a slight increase in scheduling latency
1866 between threads sharing the same address space if they invoke
1867 such copy operations with large buffers.
1868
1869 However, if the CPU data cache is using a write-allocate mode,
1870 this option is unlikely to provide any performance gain.
1871
70c70d97
NP
1872config SECCOMP
1873 bool
1874 prompt "Enable seccomp to safely compute untrusted bytecode"
1875 ---help---
1876 This kernel feature is useful for number crunching applications
1877 that may need to compute untrusted bytecode during their
1878 execution. By using pipes or other transports made available to
1879 the process as file descriptors supporting the read/write
1880 syscalls, it's possible to isolate those applications in
1881 their own address space using seccomp. Once seccomp is
1882 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1883 and the task is only allowed to execute a few safe syscalls
1884 defined by each seccomp mode.
1885
c743f380
NP
1886config CC_STACKPROTECTOR
1887 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
4a50bfe3 1888 depends on EXPERIMENTAL
c743f380
NP
1889 help
1890 This option turns on the -fstack-protector GCC feature. This
1891 feature puts, at the beginning of functions, a canary value on
1892 the stack just before the return address, and validates
1893 the value just before actually returning. Stack based buffer
1894 overflows (that need to overwrite this return address) now also
1895 overwrite the canary, which gets detected and the attack is then
1896 neutralized via a kernel panic.
1897 This feature requires gcc version 4.2 or above.
1898
73a65b3f
UKK
1899config DEPRECATED_PARAM_STRUCT
1900 bool "Provide old way to pass kernel parameters"
1901 help
1902 This was deprecated in 2001 and announced to live on for 5 years.
1903 Some old boot loaders still use this way.
1904
1da177e4
LT
1905endmenu
1906
1907menu "Boot options"
1908
9eb8f674
GL
1909config USE_OF
1910 bool "Flattened Device Tree support"
1911 select OF
1912 select OF_EARLY_FLATTREE
08a543ad 1913 select IRQ_DOMAIN
9eb8f674
GL
1914 help
1915 Include support for flattened device tree machine descriptions.
1916
1da177e4
LT
1917# Compressed boot loader in ROM. Yes, we really want to ask about
1918# TEXT and BSS so we preserve their values in the config files.
1919config ZBOOT_ROM_TEXT
1920 hex "Compressed ROM boot loader base address"
1921 default "0"
1922 help
1923 The physical address at which the ROM-able zImage is to be
1924 placed in the target. Platforms which normally make use of
1925 ROM-able zImage formats normally set this to a suitable
1926 value in their defconfig file.
1927
1928 If ZBOOT_ROM is not enabled, this has no effect.
1929
1930config ZBOOT_ROM_BSS
1931 hex "Compressed ROM boot loader BSS address"
1932 default "0"
1933 help
f8c440b2
DF
1934 The base address of an area of read/write memory in the target
1935 for the ROM-able zImage which must be available while the
1936 decompressor is running. It must be large enough to hold the
1937 entire decompressed kernel plus an additional 128 KiB.
1938 Platforms which normally make use of ROM-able zImage formats
1939 normally set this to a suitable value in their defconfig file.
1da177e4
LT
1940
1941 If ZBOOT_ROM is not enabled, this has no effect.
1942
1943config ZBOOT_ROM
1944 bool "Compressed boot loader in ROM/flash"
1945 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1946 help
1947 Say Y here if you intend to execute your compressed kernel image
1948 (zImage) directly from ROM or flash. If unsure, say N.
1949
090ab3ff
SH
1950choice
1951 prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1952 depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
1953 default ZBOOT_ROM_NONE
1954 help
1955 Include experimental SD/MMC loading code in the ROM-able zImage.
59bf8964 1956 With this enabled it is possible to write the ROM-able zImage
090ab3ff
SH
1957 kernel image to an MMC or SD card and boot the kernel straight
1958 from the reset vector. At reset the processor Mask ROM will load
59bf8964 1959 the first part of the ROM-able zImage which in turn loads the
090ab3ff
SH
1960 rest the kernel image to RAM.
1961
1962config ZBOOT_ROM_NONE
1963 bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
1964 help
1965 Do not load image from SD or MMC
1966
f45b1149
SH
1967config ZBOOT_ROM_MMCIF
1968 bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
f45b1149 1969 help
090ab3ff
SH
1970 Load image from MMCIF hardware block.
1971
1972config ZBOOT_ROM_SH_MOBILE_SDHI
1973 bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
1974 help
1975 Load image from SDHI hardware block
1976
1977endchoice
f45b1149 1978
e2a6a3aa
JB
1979config ARM_APPENDED_DTB
1980 bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
1981 depends on OF && !ZBOOT_ROM && EXPERIMENTAL
1982 help
1983 With this option, the boot code will look for a device tree binary
1984 (DTB) appended to zImage
1985 (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1986
1987 This is meant as a backward compatibility convenience for those
1988 systems with a bootloader that can't be upgraded to accommodate
1989 the documented boot protocol using a device tree.
1990
1991 Beware that there is very little in terms of protection against
1992 this option being confused by leftover garbage in memory that might
1993 look like a DTB header after a reboot if no actual DTB is appended
1994 to zImage. Do not leave this option active in a production kernel
1995 if you don't intend to always append a DTB. Proper passing of the
1996 location into r2 of a bootloader provided DTB is always preferable
1997 to this option.
1998
b90b9a38
NP
1999config ARM_ATAG_DTB_COMPAT
2000 bool "Supplement the appended DTB with traditional ATAG information"
2001 depends on ARM_APPENDED_DTB
2002 help
2003 Some old bootloaders can't be updated to a DTB capable one, yet
2004 they provide ATAGs with memory configuration, the ramdisk address,
2005 the kernel cmdline string, etc. Such information is dynamically
2006 provided by the bootloader and can't always be stored in a static
2007 DTB. To allow a device tree enabled kernel to be used with such
2008 bootloaders, this option allows zImage to extract the information
2009 from the ATAG list and store it at run time into the appended DTB.
2010
d0f34a11
GR
2011choice
2012 prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
2013 default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
2014
2015config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
2016 bool "Use bootloader kernel arguments if available"
2017 help
2018 Uses the command-line options passed by the boot loader instead of
2019 the device tree bootargs property. If the boot loader doesn't provide
2020 any, the device tree bootargs property will be used.
2021
2022config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
2023 bool "Extend with bootloader kernel arguments"
2024 help
2025 The command-line arguments provided by the boot loader will be
2026 appended to the the device tree bootargs property.
2027
2028endchoice
2029
1da177e4
LT
2030config CMDLINE
2031 string "Default kernel command string"
2032 default ""
2033 help
2034 On some architectures (EBSA110 and CATS), there is currently no way
2035 for the boot loader to pass arguments to the kernel. For these
2036 architectures, you should supply some command-line options at build
2037 time by entering them here. As a minimum, you should specify the
2038 memory size and the root device (e.g., mem=64M root=/dev/nfs).
2039
4394c124
VB
2040choice
2041 prompt "Kernel command line type" if CMDLINE != ""
2042 default CMDLINE_FROM_BOOTLOADER
2043
2044config CMDLINE_FROM_BOOTLOADER
2045 bool "Use bootloader kernel arguments if available"
2046 help
2047 Uses the command-line options passed by the boot loader. If
2048 the boot loader doesn't provide any, the default kernel command
2049 string provided in CMDLINE will be used.
2050
2051config CMDLINE_EXTEND
2052 bool "Extend bootloader kernel arguments"
2053 help
2054 The command-line arguments provided by the boot loader will be
2055 appended to the default kernel command string.
2056
92d2040d
AH
2057config CMDLINE_FORCE
2058 bool "Always use the default kernel command string"
92d2040d
AH
2059 help
2060 Always use the default kernel command string, even if the boot
2061 loader passes other arguments to the kernel.
2062 This is useful if you cannot or don't want to change the
2063 command-line options your boot loader passes to the kernel.
4394c124 2064endchoice
92d2040d 2065
1da177e4
LT
2066config XIP_KERNEL
2067 bool "Kernel Execute-In-Place from ROM"
497b7e94 2068 depends on !ZBOOT_ROM && !ARM_LPAE
1da177e4
LT
2069 help
2070 Execute-In-Place allows the kernel to run from non-volatile storage
2071 directly addressable by the CPU, such as NOR flash. This saves RAM
2072 space since the text section of the kernel is not loaded from flash
2073 to RAM. Read-write sections, such as the data section and stack,
2074 are still copied to RAM. The XIP kernel is not compressed since
2075 it has to run directly from flash, so it will take more space to
2076 store it. The flash address used to link the kernel object files,
2077 and for storing it, is configuration dependent. Therefore, if you
2078 say Y here, you must know the proper physical address where to
2079 store the kernel image depending on your own flash memory usage.
2080
2081 Also note that the make target becomes "make xipImage" rather than
2082 "make zImage" or "make Image". The final kernel binary to put in
2083 ROM memory will be arch/arm/boot/xipImage.
2084
2085 If unsure, say N.
2086
2087config XIP_PHYS_ADDR
2088 hex "XIP Kernel Physical Location"
2089 depends on XIP_KERNEL
2090 default "0x00080000"
2091 help
2092 This is the physical address in your flash memory the kernel will
2093 be linked for and stored to. This address is dependent on your
2094 own flash usage.
2095
c587e4a6
RP
2096config KEXEC
2097 bool "Kexec system call (EXPERIMENTAL)"
02b73e2e 2098 depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
c587e4a6
RP
2099 help
2100 kexec is a system call that implements the ability to shutdown your
2101 current kernel, and to start another kernel. It is like a reboot
01dd2fbf 2102 but it is independent of the system firmware. And like a reboot
c587e4a6
RP
2103 you can start any kernel with it, not just Linux.
2104
2105 It is an ongoing process to be certain the hardware in a machine
2106 is properly shutdown, so do not be surprised if this code does not
2107 initially work for you. It may help to enable device hotplugging
2108 support.
2109
4cd9d6f7
RP
2110config ATAGS_PROC
2111 bool "Export atags in procfs"
b98d7291
UL
2112 depends on KEXEC
2113 default y
4cd9d6f7
RP
2114 help
2115 Should the atags used to boot the kernel be exported in an "atags"
2116 file in procfs. Useful with kexec.
2117
cb5d39b3
MW
2118config CRASH_DUMP
2119 bool "Build kdump crash kernel (EXPERIMENTAL)"
2120 depends on EXPERIMENTAL
2121 help
2122 Generate crash dump after being started by kexec. This should
2123 be normally only set in special crash dump kernels which are
2124 loaded in the main kernel with kexec-tools into a specially
2125 reserved region and then later executed after a crash by
2126 kdump/kexec. The crash dump kernel must be compiled to a
2127 memory address not used by the main kernel
2128
2129 For more details see Documentation/kdump/kdump.txt
2130
e69edc79
EM
2131config AUTO_ZRELADDR
2132 bool "Auto calculation of the decompressed kernel image address"
2133 depends on !ZBOOT_ROM && !ARCH_U300
2134 help
2135 ZRELADDR is the physical address where the decompressed kernel
2136 image will be placed. If AUTO_ZRELADDR is selected, the address
2137 will be determined at run-time by masking the current IP with
2138 0xf8000000. This assumes the zImage being placed in the first 128MB
2139 from start of memory.
2140
1da177e4
LT
2141endmenu
2142
ac9d7efc 2143menu "CPU Power Management"
1da177e4 2144
89c52ed4 2145if ARCH_HAS_CPUFREQ
1da177e4
LT
2146
2147source "drivers/cpufreq/Kconfig"
2148
64f102b6
YS
2149config CPU_FREQ_IMX
2150 tristate "CPUfreq driver for i.MX CPUs"
2151 depends on ARCH_MXC && CPU_FREQ
2152 help
2153 This enables the CPUfreq driver for i.MX CPUs.
2154
1da177e4
LT
2155config CPU_FREQ_SA1100
2156 bool
1da177e4
LT
2157
2158config CPU_FREQ_SA1110
2159 bool
1da177e4
LT
2160
2161config CPU_FREQ_INTEGRATOR
2162 tristate "CPUfreq driver for ARM Integrator CPUs"
2163 depends on ARCH_INTEGRATOR && CPU_FREQ
2164 default y
2165 help
2166 This enables the CPUfreq driver for ARM Integrator CPUs.
2167
2168 For details, take a look at <file:Documentation/cpu-freq>.
2169
2170 If in doubt, say Y.
2171
9e2697ff
RK
2172config CPU_FREQ_PXA
2173 bool
2174 depends on CPU_FREQ && ARCH_PXA && PXA25x
2175 default y
ca7d156e 2176 select CPU_FREQ_TABLE
9e2697ff
RK
2177 select CPU_FREQ_DEFAULT_GOV_USERSPACE
2178
9d56c02a
BD
2179config CPU_FREQ_S3C
2180 bool
2181 help
2182 Internal configuration node for common cpufreq on Samsung SoC
2183
2184config CPU_FREQ_S3C24XX
4a50bfe3 2185 bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
b130d5c2 2186 depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
9d56c02a
BD
2187 select CPU_FREQ_S3C
2188 help
2189 This enables the CPUfreq driver for the Samsung S3C24XX family
2190 of CPUs.
2191
2192 For details, take a look at <file:Documentation/cpu-freq>.
2193
2194 If in doubt, say N.
2195
2196config CPU_FREQ_S3C24XX_PLL
4a50bfe3 2197 bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
9d56c02a
BD
2198 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
2199 help
2200 Compile in support for changing the PLL frequency from the
2201 S3C24XX series CPUfreq driver. The PLL takes time to settle
2202 after a frequency change, so by default it is not enabled.
2203
2204 This also means that the PLL tables for the selected CPU(s) will
2205 be built which may increase the size of the kernel image.
2206
2207config CPU_FREQ_S3C24XX_DEBUG
2208 bool "Debug CPUfreq Samsung driver core"
2209 depends on CPU_FREQ_S3C24XX
2210 help
2211 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
2212
2213config CPU_FREQ_S3C24XX_IODEBUG
2214 bool "Debug CPUfreq Samsung driver IO timing"
2215 depends on CPU_FREQ_S3C24XX
2216 help
2217 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
2218
e6d197a6
BD
2219config CPU_FREQ_S3C24XX_DEBUGFS
2220 bool "Export debugfs for CPUFreq"
2221 depends on CPU_FREQ_S3C24XX && DEBUG_FS
2222 help
2223 Export status information via debugfs.
2224
1da177e4
LT
2225endif
2226
ac9d7efc
RK
2227source "drivers/cpuidle/Kconfig"
2228
2229endmenu
2230
1da177e4
LT
2231menu "Floating point emulation"
2232
2233comment "At least one emulation must be selected"
2234
2235config FPE_NWFPE
2236 bool "NWFPE math emulation"
593c252a 2237 depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
1da177e4
LT
2238 ---help---
2239 Say Y to include the NWFPE floating point emulator in the kernel.
2240 This is necessary to run most binaries. Linux does not currently
2241 support floating point hardware so you need to say Y here even if
2242 your machine has an FPA or floating point co-processor podule.
2243
2244 You may say N here if you are going to load the Acorn FPEmulator
2245 early in the bootup.
2246
2247config FPE_NWFPE_XP
2248 bool "Support extended precision"
bedf142b 2249 depends on FPE_NWFPE
1da177e4
LT
2250 help
2251 Say Y to include 80-bit support in the kernel floating-point
2252 emulator. Otherwise, only 32 and 64-bit support is compiled in.
2253 Note that gcc does not generate 80-bit operations by default,
2254 so in most cases this option only enlarges the size of the
2255 floating point emulator without any good reason.
2256
2257 You almost surely want to say N here.
2258
2259config FPE_FASTFPE
2260 bool "FastFPE math emulation (EXPERIMENTAL)"
8993a44c 2261 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1da177e4
LT
2262 ---help---
2263 Say Y here to include the FAST floating point emulator in the kernel.
2264 This is an experimental much faster emulator which now also has full
2265 precision for the mantissa. It does not support any exceptions.
2266 It is very simple, and approximately 3-6 times faster than NWFPE.
2267
2268 It should be sufficient for most programs. It may be not suitable
2269 for scientific calculations, but you have to check this for yourself.
2270 If you do not feel you need a faster FP emulation you should better
2271 choose NWFPE.
2272
2273config VFP
2274 bool "VFP-format floating point maths"
e399b1a4 2275 depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1da177e4
LT
2276 help
2277 Say Y to include VFP support code in the kernel. This is needed
2278 if your hardware includes a VFP unit.
2279
2280 Please see <file:Documentation/arm/VFP/release-notes.txt> for
2281 release notes and additional status information.
2282
2283 Say N if your target does not have VFP hardware.
2284
25ebee02
CM
2285config VFPv3
2286 bool
2287 depends on VFP
2288 default y if CPU_V7
2289
b5872db4
CM
2290config NEON
2291 bool "Advanced SIMD (NEON) Extension support"
2292 depends on VFPv3 && CPU_V7
2293 help
2294 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2295 Extension.
2296
1da177e4
LT
2297endmenu
2298
2299menu "Userspace binary formats"
2300
2301source "fs/Kconfig.binfmt"
2302
2303config ARTHUR
2304 tristate "RISC OS personality"
704bdda0 2305 depends on !AEABI
1da177e4
LT
2306 help
2307 Say Y here to include the kernel code necessary if you want to run
2308 Acorn RISC OS/Arthur binaries under Linux. This code is still very
2309 experimental; if this sounds frightening, say N and sleep in peace.
2310 You can also say M here to compile this support as a module (which
2311 will be called arthur).
2312
2313endmenu
2314
2315menu "Power management options"
2316
eceab4ac 2317source "kernel/power/Kconfig"
1da177e4 2318
f4cb5700 2319config ARCH_SUSPEND_POSSIBLE
3d5e8af4 2320 depends on !ARCH_S5PC100 && !ARCH_TEGRA
6a786182 2321 depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
3f5d0819 2322 CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
f4cb5700
JB
2323 def_bool y
2324
15e0d9e3
AB
2325config ARM_CPU_SUSPEND
2326 def_bool PM_SLEEP
2327
1da177e4
LT
2328endmenu
2329
d5950b43
SR
2330source "net/Kconfig"
2331
ac25150f 2332source "drivers/Kconfig"
1da177e4
LT
2333
2334source "fs/Kconfig"
2335
1da177e4
LT
2336source "arch/arm/Kconfig.debug"
2337
2338source "security/Kconfig"
2339
2340source "crypto/Kconfig"
2341
2342source "lib/Kconfig"
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