Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
[deliverable/linux.git] / arch / arm / Kconfig
CommitLineData
1da177e4
LT
1#
2# For a description of the syntax of this configuration file,
3# see Documentation/kbuild/kconfig-language.txt.
4#
5
6mainmenu "Linux Kernel Configuration"
7
8config ARM
9 bool
10 default y
e17c6d56 11 select HAVE_AOUT
2064c946 12 select HAVE_IDE
12b824fb 13 select RTC_LIB
75e7153a 14 select SYS_SUPPORTS_APM_EMULATION
24b44a66 15 select GENERIC_ATOMIC64 if (!CPU_32v6K)
42d4b839 16 select HAVE_OPROFILE
5cbad0eb 17 select HAVE_ARCH_KGDB
3f550096 18 select HAVE_KPROBES if (!XIP_KERNEL)
9edddaa2 19 select HAVE_KRETPROBES if (HAVE_KPROBES)
606576ce 20 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
1fe53268 21 select HAVE_GENERIC_DMA_COHERENT
e7db7b42
AT
22 select HAVE_KERNEL_GZIP
23 select HAVE_KERNEL_LZO
7ada189f
JI
24 select HAVE_PERF_EVENTS
25 select PERF_USE_VMALLOC
1da177e4
LT
26 help
27 The ARM series is a line of low-power-consumption RISC chip designs
f6c8965a 28 licensed by ARM Ltd and targeted at embedded applications and
1da177e4 29 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
f6c8965a 30 manufactured, but legacy ARM-based PC hardware remains popular in
1da177e4
LT
31 Europe. There is an ARM Linux project with a web page at
32 <http://www.arm.linux.org.uk/>.
33
1a189b97
RK
34config HAVE_PWM
35 bool
36
75e7153a
RB
37config SYS_SUPPORTS_APM_EMULATION
38 bool
39
0a938b97
DB
40config GENERIC_GPIO
41 bool
0a938b97 42
746140c7
KH
43config GENERIC_TIME
44 bool
746140c7 45
0567a0c0
KH
46config GENERIC_CLOCKEVENTS
47 bool
0567a0c0 48
a8655e83
CM
49config GENERIC_CLOCKEVENTS_BROADCAST
50 bool
51 depends on GENERIC_CLOCKEVENTS
52 default y if SMP && !LOCAL_TIMERS
53
bc581770
LW
54config HAVE_TCM
55 bool
56 select GENERIC_ALLOCATOR
57
e119bfff
RK
58config HAVE_PROC_CPU
59 bool
60
5ea81769
AV
61config NO_IOPORT
62 bool
5ea81769 63
1da177e4
LT
64config EISA
65 bool
66 ---help---
67 The Extended Industry Standard Architecture (EISA) bus was
68 developed as an open alternative to the IBM MicroChannel bus.
69
70 The EISA bus provided some of the features of the IBM MicroChannel
71 bus while maintaining backward compatibility with cards made for
72 the older ISA bus. The EISA bus saw limited use between 1988 and
73 1995 when it was made obsolete by the PCI bus.
74
75 Say Y here if you are building a kernel for an EISA-based machine.
76
77 Otherwise, say N.
78
79config SBUS
80 bool
81
82config MCA
83 bool
84 help
85 MicroChannel Architecture is found in some IBM PS/2 machines and
86 laptops. It is a bus system similar to PCI or ISA. See
87 <file:Documentation/mca.txt> (and especially the web page given
88 there) before attempting to build an MCA bus kernel.
89
4a2581a0
TG
90config GENERIC_HARDIRQS
91 bool
92 default y
93
f16fb1ec
RK
94config STACKTRACE_SUPPORT
95 bool
96 default y
97
f76e9154
NP
98config HAVE_LATENCYTOP_SUPPORT
99 bool
100 depends on !SMP
101 default y
102
f16fb1ec
RK
103config LOCKDEP_SUPPORT
104 bool
105 default y
106
7ad1bcb2
RK
107config TRACE_IRQFLAGS_SUPPORT
108 bool
109 default y
110
4a2581a0
TG
111config HARDIRQS_SW_RESEND
112 bool
113 default y
114
115config GENERIC_IRQ_PROBE
116 bool
117 default y
118
95c354fe
NP
119config GENERIC_LOCKBREAK
120 bool
121 default y
122 depends on SMP && PREEMPT
123
1da177e4
LT
124config RWSEM_GENERIC_SPINLOCK
125 bool
126 default y
127
128config RWSEM_XCHGADD_ALGORITHM
129 bool
130
f0d1b0b3
DH
131config ARCH_HAS_ILOG2_U32
132 bool
f0d1b0b3
DH
133
134config ARCH_HAS_ILOG2_U64
135 bool
f0d1b0b3 136
89c52ed4
BD
137config ARCH_HAS_CPUFREQ
138 bool
139 help
140 Internal node to signify that the ARCH has CPUFREQ support
141 and that the relevant menu configurations are displayed for
142 it.
143
b89c3b16
AM
144config GENERIC_HWEIGHT
145 bool
146 default y
147
1da177e4
LT
148config GENERIC_CALIBRATE_DELAY
149 bool
150 default y
151
a08b6b79
Z
152config ARCH_MAY_HAVE_PC_FDC
153 bool
154
5ac6da66
CL
155config ZONE_DMA
156 bool
5ac6da66 157
1da177e4
LT
158config GENERIC_ISA_DMA
159 bool
160
1da177e4
LT
161config FIQ
162 bool
163
034d2f5a
AV
164config ARCH_MTD_XIP
165 bool
166
60a752ef 167config GENERIC_HARDIRQS_NO__DO_IRQ
60a752ef
PZ
168 def_bool y
169
d6d502fa
KK
170config ARM_L1_CACHE_SHIFT_6
171 bool
172 help
173 Setting ARM L1 cache line size to 64 Bytes.
174
c0ffa3a9
MD
175if OPROFILE
176
177config OPROFILE_ARMV6
178 def_bool y
179 depends on CPU_V6 && !SMP
180 select OPROFILE_ARM11_CORE
181
182config OPROFILE_MPCORE
183 def_bool y
184 depends on CPU_V6 && SMP
185 select OPROFILE_ARM11_CORE
186
187config OPROFILE_ARM11_CORE
188 bool
189
d7ac4e28
JP
190config OPROFILE_ARMV7
191 def_bool y
192 depends on CPU_V7 && !SMP
193 bool
194
c0ffa3a9
MD
195endif
196
c760fc19
HC
197config VECTORS_BASE
198 hex
6afd6fae 199 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
c760fc19
HC
200 default DRAM_BASE if REMAP_VECTORS_TO_RAM
201 default 0x00000000
202 help
203 The base address of exception vectors.
204
1da177e4
LT
205source "init/Kconfig"
206
dc52ddc0
MH
207source "kernel/Kconfig.freezer"
208
1da177e4
LT
209menu "System Type"
210
3c427975
HC
211config MMU
212 bool "MMU-based Paged Memory Management Support"
213 default y
214 help
215 Select if you want MMU-based virtualised addressing space
216 support by paged memory management. If unsure, say 'Y'.
217
1da177e4
LT
218choice
219 prompt "ARM system type"
6a0e2430 220 default ARCH_VERSATILE
1da177e4 221
4af6fee1
DS
222config ARCH_AAEC2000
223 bool "Agilent AAEC-2000 based"
c750815e 224 select CPU_ARM920T
4af6fee1 225 select ARM_AMBA
9483a578 226 select HAVE_CLK
4af6fee1
DS
227 help
228 This enables support for systems based on the Agilent AAEC-2000
229
230config ARCH_INTEGRATOR
231 bool "ARM Ltd. Integrator family"
232 select ARM_AMBA
89c52ed4 233 select ARCH_HAS_CPUFREQ
9483a578 234 select HAVE_CLK
d72fbdf0 235 select COMMON_CLKDEV
4af6fee1
DS
236 select ICST525
237 help
238 Support for ARM's Integrator platform.
239
240config ARCH_REALVIEW
241 bool "ARM Ltd. RealView family"
242 select ARM_AMBA
9483a578 243 select HAVE_CLK
cf30fb4a 244 select COMMON_CLKDEV
4af6fee1 245 select ICST307
85802afe 246 select GENERIC_TIME
ae30ceac 247 select GENERIC_CLOCKEVENTS
eb7fffa3 248 select ARCH_WANT_OPTIONAL_GPIOLIB
4af6fee1
DS
249 help
250 This enables support for ARM Ltd RealView boards.
251
252config ARCH_VERSATILE
253 bool "ARM Ltd. Versatile family"
254 select ARM_AMBA
255 select ARM_VIC
9483a578 256 select HAVE_CLK
71a06da0 257 select COMMON_CLKDEV
4af6fee1 258 select ICST307
b49c87c2 259 select GENERIC_TIME
89df1272 260 select GENERIC_CLOCKEVENTS
bbeddc43 261 select ARCH_WANT_OPTIONAL_GPIOLIB
4af6fee1
DS
262 help
263 This enables support for ARM Ltd Versatile board.
264
8fc5ffa0
AV
265config ARCH_AT91
266 bool "Atmel AT91"
0a938b97 267 select GENERIC_GPIO
f373e8c0 268 select ARCH_REQUIRE_GPIOLIB
93686ae8 269 select HAVE_CLK
4af6fee1 270 help
2b3b3516
AV
271 This enables support for systems based on the Atmel AT91RM9200,
272 AT91SAM9 and AT91CAP9 processors.
4af6fee1 273
1da177e4 274config ARCH_CLPS711X
4af6fee1 275 bool "Cirrus Logic CLPS711x/EP721x-based"
c750815e 276 select CPU_ARM720T
f999b8bd
MM
277 help
278 Support for Cirrus Logic 711x/721x based boards.
1da177e4 279
788c9700
RK
280config ARCH_GEMINI
281 bool "Cortina Systems Gemini"
282 select CPU_FA526
283 select GENERIC_GPIO
284 select ARCH_REQUIRE_GPIOLIB
285 help
286 Support for the Cortina Systems Gemini family SoCs
287
1da177e4
LT
288config ARCH_EBSA110
289 bool "EBSA-110"
c750815e 290 select CPU_SA110
f7e68bbf 291 select ISA
c5eb2a2b 292 select NO_IOPORT
1da177e4
LT
293 help
294 This is an evaluation board for the StrongARM processor available
f6c8965a 295 from Digital. It has limited hardware on-board, including an
1da177e4
LT
296 Ethernet interface, two PCMCIA sockets, two serial ports and a
297 parallel port.
298
e7736d47
LB
299config ARCH_EP93XX
300 bool "EP93xx-based"
c750815e 301 select CPU_ARM920T
e7736d47
LB
302 select ARM_AMBA
303 select ARM_VIC
4e9f9fd5 304 select GENERIC_GPIO
9483a578 305 select HAVE_CLK
ae696fd5 306 select COMMON_CLKDEV
7444a72e 307 select ARCH_REQUIRE_GPIOLIB
eb33575c 308 select ARCH_HAS_HOLES_MEMORYMODEL
e7736d47
LB
309 help
310 This enables support for the Cirrus EP93xx series of CPUs.
311
1da177e4
LT
312config ARCH_FOOTBRIDGE
313 bool "FootBridge"
c750815e 314 select CPU_SA110
1da177e4 315 select FOOTBRIDGE
f999b8bd
MM
316 help
317 Support for systems based on the DC21285 companion chip
318 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
1da177e4 319
788c9700
RK
320config ARCH_MXC
321 bool "Freescale MXC/iMX-based"
322 select GENERIC_TIME
323 select GENERIC_CLOCKEVENTS
324 select ARCH_MTD_XIP
325 select GENERIC_GPIO
326 select ARCH_REQUIRE_GPIOLIB
a2ab67fa 327 select HAVE_CLK
788c9700
RK
328 help
329 Support for Freescale MXC/iMX-based family of processors
330
7bd0f2f5 331config ARCH_STMP3XXX
332 bool "Freescale STMP3xxx"
333 select CPU_ARM926T
334 select HAVE_CLK
335 select COMMON_CLKDEV
336 select ARCH_REQUIRE_GPIOLIB
337 select GENERIC_TIME
338 select GENERIC_CLOCKEVENTS
339 select GENERIC_GPIO
340 select USB_ARCH_HAS_EHCI
341 help
342 Support for systems based on the Freescale 3xxx CPUs.
343
4af6fee1
DS
344config ARCH_NETX
345 bool "Hilscher NetX based"
c750815e 346 select CPU_ARM926T
4af6fee1 347 select ARM_VIC
2fcfe6b8 348 select GENERIC_CLOCKEVENTS
21edecd3 349 select GENERIC_TIME
f999b8bd 350 help
4af6fee1
DS
351 This enables support for systems based on the Hilscher NetX Soc
352
353config ARCH_H720X
354 bool "Hynix HMS720x-based"
c750815e 355 select CPU_ARM720T
4af6fee1
DS
356 select ISA_DMA_API
357 help
358 This enables support for systems based on the Hynix HMS720x
359
28ad94ec
AR
360config ARCH_NOMADIK
361 bool "STMicroelectronics Nomadik"
362 select ARM_AMBA
363 select ARM_VIC
364 select CPU_ARM926T
365 select HAVE_CLK
366 select COMMON_CLKDEV
367 select GENERIC_TIME
368 select GENERIC_CLOCKEVENTS
2ec1d359
AR
369 select GENERIC_GPIO
370 select ARCH_REQUIRE_GPIOLIB
28ad94ec
AR
371 help
372 Support for the Nomadik platform by ST-Ericsson
373
3b938be6
RK
374config ARCH_IOP13XX
375 bool "IOP13xx-based"
376 depends on MMU
c750815e 377 select CPU_XSC3
3b938be6
RK
378 select PLAT_IOP
379 select PCI
380 select ARCH_SUPPORTS_MSI
8d5796d2 381 select VMSPLIT_1G
3b938be6
RK
382 help
383 Support for Intel's IOP13XX (XScale) family of processors.
384
3f7e5815
LB
385config ARCH_IOP32X
386 bool "IOP32x-based"
a4f7e763 387 depends on MMU
c750815e 388 select CPU_XSCALE
7ae1f7ec 389 select PLAT_IOP
f7e68bbf 390 select PCI
63f385cd 391 select GENERIC_GPIO
bb2b180c 392 select ARCH_REQUIRE_GPIOLIB
f999b8bd 393 help
3f7e5815
LB
394 Support for Intel's 80219 and IOP32X (XScale) family of
395 processors.
396
397config ARCH_IOP33X
398 bool "IOP33x-based"
399 depends on MMU
c750815e 400 select CPU_XSCALE
7ae1f7ec 401 select PLAT_IOP
3f7e5815 402 select PCI
63f385cd 403 select GENERIC_GPIO
bb2b180c 404 select ARCH_REQUIRE_GPIOLIB
3f7e5815
LB
405 help
406 Support for Intel's IOP33X (XScale) family of processors.
1da177e4 407
3b938be6
RK
408config ARCH_IXP23XX
409 bool "IXP23XX-based"
a4f7e763 410 depends on MMU
c750815e 411 select CPU_XSC3
3b938be6 412 select PCI
f999b8bd 413 help
3b938be6 414 Support for Intel's IXP23xx (XScale) family of processors.
1da177e4
LT
415
416config ARCH_IXP2000
417 bool "IXP2400/2800-based"
a4f7e763 418 depends on MMU
c750815e 419 select CPU_XSCALE
f7e68bbf 420 select PCI
f999b8bd
MM
421 help
422 Support for Intel's IXP2400/2800 (XScale) family of processors.
1da177e4 423
3b938be6
RK
424config ARCH_IXP4XX
425 bool "IXP4xx-based"
a4f7e763 426 depends on MMU
c750815e 427 select CPU_XSCALE
8858e9af 428 select GENERIC_GPIO
3b938be6
RK
429 select GENERIC_TIME
430 select GENERIC_CLOCKEVENTS
485bdde7 431 select DMABOUNCE if PCI
c4713074 432 help
3b938be6 433 Support for Intel's IXP4XX (XScale) family of processors.
c4713074 434
1da177e4
LT
435config ARCH_L7200
436 bool "LinkUp-L7200"
c750815e 437 select CPU_ARM720T
1da177e4
LT
438 select FIQ
439 help
440 Say Y here if you intend to run this kernel on a LinkUp Systems
441 L7200 Software Development Board which uses an ARM720T processor.
442 Information on this board can be obtained at:
443
444 <http://www.linkupsys.com/>
445
446 If you have any questions or comments about the Linux kernel port
447 to this board, send e-mail to <sjhill@cotw.com>.
448
edabd38e
SB
449config ARCH_DOVE
450 bool "Marvell Dove"
451 select PCI
452 select GENERIC_GPIO
453 select ARCH_REQUIRE_GPIOLIB
454 select GENERIC_TIME
455 select GENERIC_CLOCKEVENTS
456 select PLAT_ORION
457 help
458 Support for the Marvell Dove SoC 88AP510
459
651c74c7
SB
460config ARCH_KIRKWOOD
461 bool "Marvell Kirkwood"
c750815e 462 select CPU_FEROCEON
651c74c7 463 select PCI
4c213430 464 select GENERIC_GPIO
a8865655 465 select ARCH_REQUIRE_GPIOLIB
651c74c7
SB
466 select GENERIC_TIME
467 select GENERIC_CLOCKEVENTS
468 select PLAT_ORION
469 help
470 Support for the following Marvell Kirkwood series SoCs:
471 88F6180, 88F6192 and 88F6281.
472
777f9beb
LB
473config ARCH_LOKI
474 bool "Marvell Loki (88RC8480)"
c750815e 475 select CPU_FEROCEON
777f9beb
LB
476 select GENERIC_TIME
477 select GENERIC_CLOCKEVENTS
478 select PLAT_ORION
479 help
480 Support for the Marvell Loki (88RC8480) SoC.
481
794d15b2
SS
482config ARCH_MV78XX0
483 bool "Marvell MV78xx0"
c750815e 484 select CPU_FEROCEON
794d15b2 485 select PCI
b95a13d7 486 select GENERIC_GPIO
a8865655 487 select ARCH_REQUIRE_GPIOLIB
794d15b2
SS
488 select GENERIC_TIME
489 select GENERIC_CLOCKEVENTS
490 select PLAT_ORION
491 help
492 Support for the following Marvell MV78xx0 series SoCs:
493 MV781x0, MV782x0.
494
9dd0b194 495config ARCH_ORION5X
585cf175
TP
496 bool "Marvell Orion"
497 depends on MMU
c750815e 498 select CPU_FEROCEON
038ee083 499 select PCI
01af72e4 500 select GENERIC_GPIO
a8865655 501 select ARCH_REQUIRE_GPIOLIB
51cbff1d
TP
502 select GENERIC_TIME
503 select GENERIC_CLOCKEVENTS
69b02f6a 504 select PLAT_ORION
585cf175 505 help
9dd0b194 506 Support for the following Marvell Orion 5x series SoCs:
d2b2a6bb 507 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
d323ade1 508 Orion-2 (5281), Orion-1-90 (6183).
585cf175 509
788c9700
RK
510config ARCH_MMP
511 bool "Marvell PXA168/910"
512 depends on MMU
513 select GENERIC_GPIO
514 select ARCH_REQUIRE_GPIOLIB
515 select HAVE_CLK
516 select COMMON_CLKDEV
517 select GENERIC_TIME
518 select GENERIC_CLOCKEVENTS
519 select TICK_ONESHOT
520 select PLAT_PXA
521 help
522 Support for Marvell's PXA168/910 processor line.
523
524config ARCH_KS8695
525 bool "Micrel/Kendin KS8695"
526 select CPU_ARM922T
527 select GENERIC_GPIO
528 select ARCH_REQUIRE_GPIOLIB
529 help
530 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
531 System-on-Chip devices.
532
533config ARCH_NS9XXX
534 bool "NetSilicon NS9xxx"
535 select CPU_ARM926T
536 select GENERIC_GPIO
537 select GENERIC_TIME
538 select GENERIC_CLOCKEVENTS
539 select HAVE_CLK
540 help
541 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
542 System.
543
544 <http://www.digi.com/products/microprocessors/index.jsp>
545
546config ARCH_W90X900
547 bool "Nuvoton W90X900 CPU"
548 select CPU_ARM926T
c52d3d68 549 select ARCH_REQUIRE_GPIOLIB
550 select GENERIC_GPIO
d2c24195 551 select HAVE_CLK
0e4a34bb 552 select COMMON_CLKDEV
58b5369e 553 select GENERIC_TIME
554 select GENERIC_CLOCKEVENTS
788c9700 555 help
a8bc4ead 556 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
557 At present, the w90x900 has been renamed nuc900, regarding
558 the ARM series product line, you can login the following
559 link address to know more.
560
561 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
562 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
788c9700 563
a62e9030 564config ARCH_NUC93X
565 bool "Nuvoton NUC93X CPU"
566 select CPU_ARM926T
567 select HAVE_CLK
568 select COMMON_CLKDEV
569 help
570 Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
571 low-power and high performance MPEG-4/JPEG multimedia controller chip.
572
4af6fee1
DS
573config ARCH_PNX4008
574 bool "Philips Nexperia PNX4008 Mobile"
c750815e 575 select CPU_ARM926T
9483a578 576 select HAVE_CLK
6985a5ad 577 select COMMON_CLKDEV
4af6fee1
DS
578 help
579 This enables support for Philips PNX4008 mobile platform.
580
1da177e4 581config ARCH_PXA
2c8086a5 582 bool "PXA2xx/PXA3xx-based"
a4f7e763 583 depends on MMU
034d2f5a 584 select ARCH_MTD_XIP
89c52ed4 585 select ARCH_HAS_CPUFREQ
0a938b97 586 select GENERIC_GPIO
9483a578 587 select HAVE_CLK
8c3abc7d 588 select COMMON_CLKDEV
7444a72e 589 select ARCH_REQUIRE_GPIOLIB
45cf5eef 590 select GENERIC_TIME
981d0f39 591 select GENERIC_CLOCKEVENTS
a88264c2 592 select TICK_ONESHOT
bd5ce433 593 select PLAT_PXA
f999b8bd 594 help
2c8086a5 595 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
1da177e4 596
788c9700
RK
597config ARCH_MSM
598 bool "Qualcomm MSM"
599 select CPU_V6
49cbe786
EM
600 select GENERIC_TIME
601 select GENERIC_CLOCKEVENTS
49cbe786 602 help
788c9700
RK
603 Support for Qualcomm MSM7K based systems. This runs on the ARM11
604 apps processor of the MSM7K and depends on a shared memory
605 interface to the ARM9 modem processor which runs the baseband stack
606 and controls some vital subsystems (clock and power control, etc).
49cbe786 607
1da177e4
LT
608config ARCH_RPC
609 bool "RiscPC"
610 select ARCH_ACORN
611 select FIQ
612 select TIMER_ACORN
a08b6b79 613 select ARCH_MAY_HAVE_PC_FDC
341eb781 614 select HAVE_PATA_PLATFORM
065909b9 615 select ISA_DMA_API
5ea81769 616 select NO_IOPORT
07f841b7 617 select ARCH_SPARSEMEM_ENABLE
1da177e4
LT
618 help
619 On the Acorn Risc-PC, Linux can support the internal IDE disk and
620 CD-ROM interface, serial and parallel port, and the floppy drive.
621
622config ARCH_SA1100
623 bool "SA1100-based"
c750815e 624 select CPU_SA1100
f7e68bbf 625 select ISA
05944d74 626 select ARCH_SPARSEMEM_ENABLE
034d2f5a 627 select ARCH_MTD_XIP
89c52ed4 628 select ARCH_HAS_CPUFREQ
1937f5b9 629 select CPU_FREQ
0a938b97 630 select GENERIC_GPIO
d142b6e7 631 select GENERIC_TIME
3e238be2 632 select GENERIC_CLOCKEVENTS
9483a578 633 select HAVE_CLK
3e238be2 634 select TICK_ONESHOT
7444a72e 635 select ARCH_REQUIRE_GPIOLIB
f999b8bd
MM
636 help
637 Support for StrongARM 11x0 based boards.
1da177e4
LT
638
639config ARCH_S3C2410
e4d06e39 640 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
0a938b97 641 select GENERIC_GPIO
9d56c02a 642 select ARCH_HAS_CPUFREQ
9483a578 643 select HAVE_CLK
1da177e4
LT
644 help
645 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
646 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
f6c8965a 647 the Samsung SMDK2410 development board (and derivatives).
1da177e4 648
a08ab637
BD
649config ARCH_S3C64XX
650 bool "Samsung S3C64XX"
651 select GENERIC_GPIO
652 select HAVE_CLK
89c52ed4 653 select ARCH_HAS_CPUFREQ
a08ab637
BD
654 help
655 Samsung S3C64XX series based systems
656
5a7652f2
BM
657config ARCH_S5PC1XX
658 bool "Samsung S5PC1XX"
659 select GENERIC_GPIO
660 select HAVE_CLK
661 select CPU_V7
d6d502fa 662 select ARM_L1_CACHE_SHIFT_6
5a7652f2
BM
663 help
664 Samsung S5PC1XX series based systems
665
1da177e4
LT
666config ARCH_SHARK
667 bool "Shark"
c750815e 668 select CPU_SA110
f7e68bbf
RK
669 select ISA
670 select ISA_DMA
3bca103a 671 select ZONE_DMA
f7e68bbf 672 select PCI
f999b8bd
MM
673 help
674 Support for the StrongARM based Digital DNARD machine, also known
675 as "Shark" (<http://www.shark-linux.de/shark.html>).
1da177e4
LT
676
677config ARCH_LH7A40X
678 bool "Sharp LH7A40X"
c750815e 679 select CPU_ARM922T
4ba3f7c5
RK
680 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
681 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
1da177e4
LT
682 help
683 Say Y here for systems based on one of the Sharp LH7A40X
684 System on a Chip processors. These CPUs include an ARM922T
685 core with a wide array of integrated devices for
686 hand-held and low-power applications.
687
d98aac75
LW
688config ARCH_U300
689 bool "ST-Ericsson U300 Series"
690 depends on MMU
691 select CPU_ARM926T
bc581770 692 select HAVE_TCM
d98aac75
LW
693 select ARM_AMBA
694 select ARM_VIC
695 select GENERIC_TIME
696 select GENERIC_CLOCKEVENTS
697 select HAVE_CLK
698 select COMMON_CLKDEV
699 select GENERIC_GPIO
700 help
701 Support for ST-Ericsson U300 series mobile platforms.
702
7c6337e2
KH
703config ARCH_DAVINCI
704 bool "TI DaVinci"
c750815e 705 select CPU_ARM926T
7c6337e2
KH
706 select GENERIC_TIME
707 select GENERIC_CLOCKEVENTS
3d9edf09 708 select GENERIC_GPIO
dce1115b 709 select ARCH_REQUIRE_GPIOLIB
9483a578 710 select HAVE_CLK
3bca103a 711 select ZONE_DMA
9232fcc9 712 select HAVE_IDE
c5b736d0 713 select COMMON_CLKDEV
20e9969b 714 select GENERIC_ALLOCATOR
ae88e05a 715 select ARCH_HAS_HOLES_MEMORYMODEL
7c6337e2
KH
716 help
717 Support for TI's DaVinci platform.
718
3b938be6
RK
719config ARCH_OMAP
720 bool "TI OMAP"
721 select GENERIC_GPIO
9483a578 722 select HAVE_CLK
7444a72e 723 select ARCH_REQUIRE_GPIOLIB
89c52ed4 724 select ARCH_HAS_CPUFREQ
3b938be6 725 select GENERIC_TIME
06cad098 726 select GENERIC_CLOCKEVENTS
9af915da 727 select ARCH_HAS_HOLES_MEMORYMODEL
3b938be6
RK
728 help
729 Support for TI's OMAP platform (OMAP1 and OMAP2).
730
6288e28d
LC
731config ARCH_BCMRING
732 bool "Broadcom BCMRING"
733 depends on MMU
734 select CPU_V6
735 select ARM_AMBA
736 select COMMON_CLKDEV
737 select GENERIC_TIME
738 select GENERIC_CLOCKEVENTS
739 select ARCH_WANT_OPTIONAL_GPIOLIB
740 help
741 Support for Broadcom's BCMRing platform.
742
850265e8
SK
743config ARCH_U8500
744 bool "ST-Ericsson U8500 Series"
745 select CPU_V7
746 select ARM_AMBA
747 select GENERIC_TIME
748 select GENERIC_CLOCKEVENTS
749 select COMMON_CLKDEV
750 help
751 Support for ST-Ericsson's Ux500 architecture
752
1da177e4
LT
753endchoice
754
95b8f20f
RK
755source "arch/arm/mach-aaec2000/Kconfig"
756
757source "arch/arm/mach-at91/Kconfig"
758
759source "arch/arm/mach-bcmring/Kconfig"
760
1da177e4
LT
761source "arch/arm/mach-clps711x/Kconfig"
762
95b8f20f
RK
763source "arch/arm/mach-davinci/Kconfig"
764
765source "arch/arm/mach-dove/Kconfig"
766
e7736d47
LB
767source "arch/arm/mach-ep93xx/Kconfig"
768
1da177e4
LT
769source "arch/arm/mach-footbridge/Kconfig"
770
59d3a193
PZ
771source "arch/arm/mach-gemini/Kconfig"
772
95b8f20f
RK
773source "arch/arm/mach-h720x/Kconfig"
774
1da177e4
LT
775source "arch/arm/mach-integrator/Kconfig"
776
3f7e5815
LB
777source "arch/arm/mach-iop32x/Kconfig"
778
779source "arch/arm/mach-iop33x/Kconfig"
1da177e4 780
285f5fa7
DW
781source "arch/arm/mach-iop13xx/Kconfig"
782
1da177e4
LT
783source "arch/arm/mach-ixp4xx/Kconfig"
784
785source "arch/arm/mach-ixp2000/Kconfig"
786
c4713074
LB
787source "arch/arm/mach-ixp23xx/Kconfig"
788
95b8f20f
RK
789source "arch/arm/mach-kirkwood/Kconfig"
790
791source "arch/arm/mach-ks8695/Kconfig"
792
793source "arch/arm/mach-lh7a40x/Kconfig"
794
777f9beb
LB
795source "arch/arm/mach-loki/Kconfig"
796
95b8f20f
RK
797source "arch/arm/mach-msm/Kconfig"
798
794d15b2
SS
799source "arch/arm/mach-mv78xx0/Kconfig"
800
95b8f20f 801source "arch/arm/plat-mxc/Kconfig"
1da177e4 802
95b8f20f 803source "arch/arm/mach-netx/Kconfig"
49cbe786 804
95b8f20f
RK
805source "arch/arm/mach-nomadik/Kconfig"
806source "arch/arm/plat-nomadik/Kconfig"
807
808source "arch/arm/mach-ns9xxx/Kconfig"
1da177e4 809
186f93ea 810source "arch/arm/mach-nuc93x/Kconfig"
1da177e4 811
d48af15e
TL
812source "arch/arm/plat-omap/Kconfig"
813
814source "arch/arm/mach-omap1/Kconfig"
1da177e4 815
1dbae815
TL
816source "arch/arm/mach-omap2/Kconfig"
817
9dd0b194 818source "arch/arm/mach-orion5x/Kconfig"
585cf175 819
95b8f20f
RK
820source "arch/arm/mach-pxa/Kconfig"
821source "arch/arm/plat-pxa/Kconfig"
585cf175 822
95b8f20f
RK
823source "arch/arm/mach-mmp/Kconfig"
824
825source "arch/arm/mach-realview/Kconfig"
826
827source "arch/arm/mach-sa1100/Kconfig"
edabd38e 828
cf383678 829source "arch/arm/plat-samsung/Kconfig"
a21765a7 830source "arch/arm/plat-s3c24xx/Kconfig"
a08ab637 831source "arch/arm/plat-s3c64xx/Kconfig"
d58153d8 832source "arch/arm/plat-s3c/Kconfig"
5a7652f2 833source "arch/arm/plat-s5pc1xx/Kconfig"
a21765a7
BD
834
835if ARCH_S3C2410
836source "arch/arm/mach-s3c2400/Kconfig"
1da177e4 837source "arch/arm/mach-s3c2410/Kconfig"
a21765a7
BD
838source "arch/arm/mach-s3c2412/Kconfig"
839source "arch/arm/mach-s3c2440/Kconfig"
840source "arch/arm/mach-s3c2442/Kconfig"
e4d06e39 841source "arch/arm/mach-s3c2443/Kconfig"
a21765a7 842endif
1da177e4 843
a08ab637
BD
844if ARCH_S3C64XX
845source "arch/arm/mach-s3c6400/Kconfig"
846source "arch/arm/mach-s3c6410/Kconfig"
847endif
848
7bd0f2f5 849source "arch/arm/plat-stmp3xxx/Kconfig"
850
5a7652f2
BM
851if ARCH_S5PC1XX
852source "arch/arm/mach-s5pc100/Kconfig"
853endif
854
95b8f20f 855source "arch/arm/mach-u300/Kconfig"
1da177e4 856
95b8f20f 857source "arch/arm/mach-ux500/Kconfig"
1da177e4
LT
858
859source "arch/arm/mach-versatile/Kconfig"
860
7ec80ddf 861source "arch/arm/mach-w90x900/Kconfig"
862
1da177e4
LT
863# Definitions to make life easier
864config ARCH_ACORN
865 bool
866
7ae1f7ec
LB
867config PLAT_IOP
868 bool
469d3044 869 select GENERIC_CLOCKEVENTS
980f2296 870 select GENERIC_TIME
7ae1f7ec 871
69b02f6a
LB
872config PLAT_ORION
873 bool
874
bd5ce433
EM
875config PLAT_PXA
876 bool
877
1da177e4
LT
878source arch/arm/mm/Kconfig
879
afe4b25e
LB
880config IWMMXT
881 bool "Enable iWMMXt support"
40305a58
EM
882 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
883 default y if PXA27x || PXA3xx || ARCH_MMP
afe4b25e
LB
884 help
885 Enable support for iWMMXt context switching at run time if
886 running on a CPU that supports it.
887
1da177e4
LT
888# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
889config XSCALE_PMU
890 bool
891 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
892 default y
893
0f4f0672
JI
894config CPU_HAS_PMU
895 depends on CPU_V6 || CPU_V7 || XSCALE_PMU
896 default y
897 bool
898
3b93e7b0
HC
899if !MMU
900source "arch/arm/Kconfig-nommu"
901endif
902
9cba3ccc
CM
903config ARM_ERRATA_411920
904 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
905 depends on CPU_V6 && !SMP
906 help
907 Invalidation of the Instruction Cache operation can
908 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
909 It does not affect the MPCore. This option enables the ARM Ltd.
910 recommended workaround.
911
7ce236fc
CM
912config ARM_ERRATA_430973
913 bool "ARM errata: Stale prediction on replaced interworking branch"
914 depends on CPU_V7
915 help
916 This option enables the workaround for the 430973 Cortex-A8
917 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
918 interworking branch is replaced with another code sequence at the
919 same virtual address, whether due to self-modifying code or virtual
920 to physical address re-mapping, Cortex-A8 does not recover from the
921 stale interworking branch prediction. This results in Cortex-A8
922 executing the new code sequence in the incorrect ARM or Thumb state.
923 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
924 and also flushes the branch target cache at every context switch.
925 Note that setting specific bits in the ACTLR register may not be
926 available in non-secure mode.
927
855c551f
CM
928config ARM_ERRATA_458693
929 bool "ARM errata: Processor deadlock when a false hazard is created"
930 depends on CPU_V7
931 help
932 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
933 erratum. For very specific sequences of memory operations, it is
934 possible for a hazard condition intended for a cache line to instead
935 be incorrectly associated with a different cache line. This false
936 hazard might then cause a processor deadlock. The workaround enables
937 the L1 caching of the NEON accesses and disables the PLD instruction
938 in the ACTLR register. Note that setting specific bits in the ACTLR
939 register may not be available in non-secure mode.
940
0516e464
CM
941config ARM_ERRATA_460075
942 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
943 depends on CPU_V7
944 help
945 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
946 erratum. Any asynchronous access to the L2 cache may encounter a
947 situation in which recent store transactions to the L2 cache are lost
948 and overwritten with stale memory contents from external memory. The
949 workaround disables the write-allocate mode for the L2 cache via the
950 ACTLR register. Note that setting specific bits in the ACTLR register
951 may not be available in non-secure mode.
952
9e65582a
SS
953config PL310_ERRATA_588369
954 bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
955 depends on CACHE_L2X0 && ARCH_OMAP4
956 help
957 The PL310 L2 cache controller implements three types of Clean &
958 Invalidate maintenance operations: by Physical Address
959 (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
960 They are architecturally defined to behave as the execution of a
961 clean operation followed immediately by an invalidate operation,
962 both performing to the same memory location. This functionality
963 is not correctly implemented in PL310 as clean lines are not
964 invalidated as a result of these operations. Note that this errata
965 uses Texas Instrument's secure monitor api.
1da177e4
LT
966endmenu
967
968source "arch/arm/common/Kconfig"
969
970config FORCE_MAX_ZONEORDER
971 int
972 depends on SA1111
973 default "9"
974
975menu "Bus support"
976
977config ARM_AMBA
978 bool
979
980config ISA
981 bool
1da177e4
LT
982 help
983 Find out whether you have ISA slots on your motherboard. ISA is the
984 name of a bus system, i.e. the way the CPU talks to the other stuff
985 inside your box. Other bus systems are PCI, EISA, MicroChannel
986 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
987 newer boards don't support it. If you have ISA, say Y, otherwise N.
988
065909b9 989# Select ISA DMA controller support
1da177e4
LT
990config ISA_DMA
991 bool
065909b9 992 select ISA_DMA_API
1da177e4 993
065909b9 994# Select ISA DMA interface
5cae841b
AV
995config ISA_DMA_API
996 bool
5cae841b 997
1da177e4 998config PCI
a0113a99 999 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
1da177e4
LT
1000 help
1001 Find out whether you have a PCI motherboard. PCI is the name of a
1002 bus system, i.e. the way the CPU talks to the other stuff inside
1003 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1004 VESA. If you have PCI, say Y, otherwise N.
1005
36e23590
MW
1006config PCI_SYSCALL
1007 def_bool PCI
1008
1da177e4
LT
1009# Select the host bridge type
1010config PCI_HOST_VIA82C505
1011 bool
1012 depends on PCI && ARCH_SHARK
1013 default y
1014
a0113a99
MR
1015config PCI_HOST_ITE8152
1016 bool
1017 depends on PCI && MACH_ARMCORE
1018 default y
1019 select DMABOUNCE
1020
1da177e4
LT
1021source "drivers/pci/Kconfig"
1022
1023source "drivers/pcmcia/Kconfig"
1024
1025endmenu
1026
1027menu "Kernel Features"
1028
0567a0c0
KH
1029source "kernel/time/Kconfig"
1030
1da177e4
LT
1031config SMP
1032 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
42578c82 1033 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
850265e8 1034 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
bc28248e 1035 depends on GENERIC_CLOCKEVENTS
f6dd9fa5 1036 select USE_GENERIC_SMP_HELPERS
850265e8 1037 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1da177e4
LT
1038 help
1039 This enables support for systems with more than one CPU. If you have
1040 a system with only one CPU, like most personal computers, say N. If
1041 you have a system with more than one CPU, say Y.
1042
1043 If you say N here, the kernel will run on single and multiprocessor
1044 machines, but will use only one CPU of a multiprocessor machine. If
1045 you say Y here, the kernel will run on many, but not all, single
1046 processor machines. On a single processor machine, the kernel will
1047 run faster if you say N here.
1048
03502faa 1049 See also <file:Documentation/i386/IO-APIC.txt>,
1da177e4
LT
1050 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1051 <http://www.linuxdoc.org/docs.html#howto>.
1052
1053 If you don't know what to do here, say N.
1054
a8cbcd92
RK
1055config HAVE_ARM_SCU
1056 bool
1057 depends on SMP
1058 help
1059 This option enables support for the ARM system coherency unit
1060
f32f4ce2
RK
1061config HAVE_ARM_TWD
1062 bool
1063 depends on SMP
1064 help
1065 This options enables support for the ARM timer and watchdog unit
1066
8d5796d2
LB
1067choice
1068 prompt "Memory split"
1069 default VMSPLIT_3G
1070 help
1071 Select the desired split between kernel and user memory.
1072
1073 If you are not absolutely sure what you are doing, leave this
1074 option alone!
1075
1076 config VMSPLIT_3G
1077 bool "3G/1G user/kernel split"
1078 config VMSPLIT_2G
1079 bool "2G/2G user/kernel split"
1080 config VMSPLIT_1G
1081 bool "1G/3G user/kernel split"
1082endchoice
1083
1084config PAGE_OFFSET
1085 hex
1086 default 0x40000000 if VMSPLIT_1G
1087 default 0x80000000 if VMSPLIT_2G
1088 default 0xC0000000
1089
1da177e4
LT
1090config NR_CPUS
1091 int "Maximum number of CPUs (2-32)"
1092 range 2 32
1093 depends on SMP
1094 default "4"
1095
a054a811
RK
1096config HOTPLUG_CPU
1097 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1098 depends on SMP && HOTPLUG && EXPERIMENTAL
1099 help
1100 Say Y here to experiment with turning CPUs off and on. CPUs
1101 can be controlled through /sys/devices/system/cpu.
1102
37ee16ae
RK
1103config LOCAL_TIMERS
1104 bool "Use local timer interrupts"
42578c82 1105 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
850265e8 1106 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
37ee16ae 1107 default y
850265e8 1108 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
37ee16ae
RK
1109 help
1110 Enable support for local timers on SMP platforms, rather then the
1111 legacy IPI broadcast method. Local timers allows the system
1112 accounting to be spread across the timer interval, preventing a
1113 "thundering herd" at every timer tick.
1114
d45a398f 1115source kernel/Kconfig.preempt
1da177e4 1116
f8065813
RK
1117config HZ
1118 int
1119 default 128 if ARCH_L7200
1120 default 200 if ARCH_EBSA110 || ARCH_S3C2410
bfe65704 1121 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
5248c657 1122 default AT91_TIMER_HZ if ARCH_AT91
f8065813
RK
1123 default 100
1124
16c79651
CM
1125config THUMB2_KERNEL
1126 bool "Compile the kernel in Thumb-2 mode"
1127 depends on CPU_V7 && EXPERIMENTAL
1128 select AEABI
1129 select ARM_ASM_UNIFIED
1130 help
1131 By enabling this option, the kernel will be compiled in
1132 Thumb-2 mode. A compiler/assembler that understand the unified
1133 ARM-Thumb syntax is needed.
1134
1135 If unsure, say N.
1136
0becb088
CM
1137config ARM_ASM_UNIFIED
1138 bool
1139
704bdda0
NP
1140config AEABI
1141 bool "Use the ARM EABI to compile the kernel"
1142 help
1143 This option allows for the kernel to be compiled using the latest
1144 ARM ABI (aka EABI). This is only useful if you are using a user
1145 space environment that is also compiled with EABI.
1146
1147 Since there are major incompatibilities between the legacy ABI and
1148 EABI, especially with regard to structure member alignment, this
1149 option also changes the kernel syscall calling convention to
1150 disambiguate both ABIs and allow for backward compatibility support
1151 (selected with CONFIG_OABI_COMPAT).
1152
1153 To use this you need GCC version 4.0.0 or later.
1154
6c90c872 1155config OABI_COMPAT
a73a3ff1 1156 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
61c484d4 1157 depends on AEABI && EXPERIMENTAL
6c90c872
NP
1158 default y
1159 help
1160 This option preserves the old syscall interface along with the
1161 new (ARM EABI) one. It also provides a compatibility layer to
1162 intercept syscalls that have structure arguments which layout
1163 in memory differs between the legacy ABI and the new ARM EABI
1164 (only for non "thumb" binaries). This option adds a tiny
1165 overhead to all syscalls and produces a slightly larger kernel.
1166 If you know you'll be using only pure EABI user space then you
1167 can say N here. If this option is not selected and you attempt
1168 to execute a legacy ABI binary then the result will be
1169 UNPREDICTABLE (in fact it can be predicted that it won't work
1170 at all). If in doubt say Y.
1171
eb33575c 1172config ARCH_HAS_HOLES_MEMORYMODEL
e80d6a24 1173 bool
e80d6a24 1174
07a2f737 1175# Discontigmem is deprecated
3f22ab27 1176config ARCH_DISCONTIGMEM_ENABLE
1da177e4 1177 bool
1da177e4 1178
05944d74
RK
1179config ARCH_SPARSEMEM_ENABLE
1180 bool
1181
07a2f737
RK
1182config ARCH_SPARSEMEM_DEFAULT
1183 def_bool ARCH_SPARSEMEM_ENABLE
1184
05944d74 1185config ARCH_SELECT_MEMORY_MODEL
07a2f737 1186 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
05944d74 1187
c80d79d7
YG
1188config NODES_SHIFT
1189 int
1190 default "4" if ARCH_LH7A40X
1191 default "2"
1192 depends on NEED_MULTIPLE_NODES
1193
053a96ca
NP
1194config HIGHMEM
1195 bool "High Memory Support (EXPERIMENTAL)"
1196 depends on MMU && EXPERIMENTAL
1197 help
1198 The address space of ARM processors is only 4 Gigabytes large
1199 and it has to accommodate user address space, kernel address
1200 space as well as some memory mapped IO. That means that, if you
1201 have a large amount of physical memory and/or IO, not all of the
1202 memory can be "permanently mapped" by the kernel. The physical
1203 memory that is not permanently mapped is called "high memory".
1204
1205 Depending on the selected kernel/user memory split, minimum
1206 vmalloc space and actual amount of RAM, you may not need this
1207 option which should result in a slightly faster kernel.
1208
1209 If unsure, say n.
1210
65cec8e3
RK
1211config HIGHPTE
1212 bool "Allocate 2nd-level pagetables from highmem"
1213 depends on HIGHMEM
1214 depends on !OUTER_CACHE
1215
1b8873a0
JI
1216config HW_PERF_EVENTS
1217 bool "Enable hardware performance counter support for perf events"
796d1295 1218 depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
1b8873a0
JI
1219 default y
1220 help
1221 Enable hardware performance counter support for perf events. If
1222 disabled, perf events will use software events only.
1223
3f22ab27
DH
1224source "mm/Kconfig"
1225
1da177e4
LT
1226config LEDS
1227 bool "Timer and CPU usage LEDs"
e055d5bf 1228 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
8c8fdbc9 1229 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1da177e4
LT
1230 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1231 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
73a59c1c 1232 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
25329671 1233 ARCH_AT91 || ARCH_DAVINCI || \
ff3042fb 1234 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1da177e4
LT
1235 help
1236 If you say Y here, the LEDs on your machine will be used
1237 to provide useful information about your current system status.
1238
1239 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1240 be able to select which LEDs are active using the options below. If
1241 you are compiling a kernel for the EBSA-110 or the LART however, the
1242 red LED will simply flash regularly to indicate that the system is
1243 still functional. It is safe to say Y here if you have a CATS
1244 system, but the driver will do nothing.
1245
1246config LEDS_TIMER
1247 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
eebdf7d7
DB
1248 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1249 || MACH_OMAP_PERSEUS2
1da177e4 1250 depends on LEDS
0567a0c0 1251 depends on !GENERIC_CLOCKEVENTS
1da177e4
LT
1252 default y if ARCH_EBSA110
1253 help
1254 If you say Y here, one of the system LEDs (the green one on the
1255 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1256 will flash regularly to indicate that the system is still
1257 operational. This is mainly useful to kernel hackers who are
1258 debugging unstable kernels.
1259
1260 The LART uses the same LED for both Timer LED and CPU usage LED
1261 functions. You may choose to use both, but the Timer LED function
1262 will overrule the CPU usage LED.
1263
1264config LEDS_CPU
1265 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
eebdf7d7
DB
1266 !ARCH_OMAP) \
1267 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1268 || MACH_OMAP_PERSEUS2
1da177e4
LT
1269 depends on LEDS
1270 help
1271 If you say Y here, the red LED will be used to give a good real
1272 time indication of CPU usage, by lighting whenever the idle task
1273 is not currently executing.
1274
1275 The LART uses the same LED for both Timer LED and CPU usage LED
1276 functions. You may choose to use both, but the Timer LED function
1277 will overrule the CPU usage LED.
1278
1279config ALIGNMENT_TRAP
1280 bool
f12d0d7c 1281 depends on CPU_CP15_MMU
1da177e4 1282 default y if !ARCH_EBSA110
e119bfff 1283 select HAVE_PROC_CPU if PROC_FS
1da177e4 1284 help
84eb8d06 1285 ARM processors cannot fetch/store information which is not
1da177e4
LT
1286 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1287 address divisible by 4. On 32-bit ARM processors, these non-aligned
1288 fetch/store instructions will be emulated in software if you say
1289 here, which has a severe performance impact. This is necessary for
1290 correct operation of some network protocols. With an IP-only
1291 configuration it is safe to say N, otherwise say Y.
1292
39ec58f3
LB
1293config UACCESS_WITH_MEMCPY
1294 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1295 depends on MMU && EXPERIMENTAL
1296 default y if CPU_FEROCEON
1297 help
1298 Implement faster copy_to_user and clear_user methods for CPU
1299 cores where a 8-word STM instruction give significantly higher
1300 memory write throughput than a sequence of individual 32bit stores.
1301
1302 A possible side effect is a slight increase in scheduling latency
1303 between threads sharing the same address space if they invoke
1304 such copy operations with large buffers.
1305
1306 However, if the CPU data cache is using a write-allocate mode,
1307 this option is unlikely to provide any performance gain.
1308
1da177e4
LT
1309endmenu
1310
1311menu "Boot options"
1312
1313# Compressed boot loader in ROM. Yes, we really want to ask about
1314# TEXT and BSS so we preserve their values in the config files.
1315config ZBOOT_ROM_TEXT
1316 hex "Compressed ROM boot loader base address"
1317 default "0"
1318 help
1319 The physical address at which the ROM-able zImage is to be
1320 placed in the target. Platforms which normally make use of
1321 ROM-able zImage formats normally set this to a suitable
1322 value in their defconfig file.
1323
1324 If ZBOOT_ROM is not enabled, this has no effect.
1325
1326config ZBOOT_ROM_BSS
1327 hex "Compressed ROM boot loader BSS address"
1328 default "0"
1329 help
f8c440b2
DF
1330 The base address of an area of read/write memory in the target
1331 for the ROM-able zImage which must be available while the
1332 decompressor is running. It must be large enough to hold the
1333 entire decompressed kernel plus an additional 128 KiB.
1334 Platforms which normally make use of ROM-able zImage formats
1335 normally set this to a suitable value in their defconfig file.
1da177e4
LT
1336
1337 If ZBOOT_ROM is not enabled, this has no effect.
1338
1339config ZBOOT_ROM
1340 bool "Compressed boot loader in ROM/flash"
1341 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1342 help
1343 Say Y here if you intend to execute your compressed kernel image
1344 (zImage) directly from ROM or flash. If unsure, say N.
1345
1346config CMDLINE
1347 string "Default kernel command string"
1348 default ""
1349 help
1350 On some architectures (EBSA110 and CATS), there is currently no way
1351 for the boot loader to pass arguments to the kernel. For these
1352 architectures, you should supply some command-line options at build
1353 time by entering them here. As a minimum, you should specify the
1354 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1355
1356config XIP_KERNEL
1357 bool "Kernel Execute-In-Place from ROM"
1358 depends on !ZBOOT_ROM
1359 help
1360 Execute-In-Place allows the kernel to run from non-volatile storage
1361 directly addressable by the CPU, such as NOR flash. This saves RAM
1362 space since the text section of the kernel is not loaded from flash
1363 to RAM. Read-write sections, such as the data section and stack,
1364 are still copied to RAM. The XIP kernel is not compressed since
1365 it has to run directly from flash, so it will take more space to
1366 store it. The flash address used to link the kernel object files,
1367 and for storing it, is configuration dependent. Therefore, if you
1368 say Y here, you must know the proper physical address where to
1369 store the kernel image depending on your own flash memory usage.
1370
1371 Also note that the make target becomes "make xipImage" rather than
1372 "make zImage" or "make Image". The final kernel binary to put in
1373 ROM memory will be arch/arm/boot/xipImage.
1374
1375 If unsure, say N.
1376
1377config XIP_PHYS_ADDR
1378 hex "XIP Kernel Physical Location"
1379 depends on XIP_KERNEL
1380 default "0x00080000"
1381 help
1382 This is the physical address in your flash memory the kernel will
1383 be linked for and stored to. This address is dependent on your
1384 own flash usage.
1385
c587e4a6
RP
1386config KEXEC
1387 bool "Kexec system call (EXPERIMENTAL)"
1388 depends on EXPERIMENTAL
1389 help
1390 kexec is a system call that implements the ability to shutdown your
1391 current kernel, and to start another kernel. It is like a reboot
01dd2fbf 1392 but it is independent of the system firmware. And like a reboot
c587e4a6
RP
1393 you can start any kernel with it, not just Linux.
1394
1395 It is an ongoing process to be certain the hardware in a machine
1396 is properly shutdown, so do not be surprised if this code does not
1397 initially work for you. It may help to enable device hotplugging
1398 support.
1399
4cd9d6f7
RP
1400config ATAGS_PROC
1401 bool "Export atags in procfs"
b98d7291
UL
1402 depends on KEXEC
1403 default y
4cd9d6f7
RP
1404 help
1405 Should the atags used to boot the kernel be exported in an "atags"
1406 file in procfs. Useful with kexec.
1407
1da177e4
LT
1408endmenu
1409
ac9d7efc 1410menu "CPU Power Management"
1da177e4 1411
89c52ed4 1412if ARCH_HAS_CPUFREQ
1da177e4
LT
1413
1414source "drivers/cpufreq/Kconfig"
1415
1416config CPU_FREQ_SA1100
1417 bool
1da177e4
LT
1418
1419config CPU_FREQ_SA1110
1420 bool
1da177e4
LT
1421
1422config CPU_FREQ_INTEGRATOR
1423 tristate "CPUfreq driver for ARM Integrator CPUs"
1424 depends on ARCH_INTEGRATOR && CPU_FREQ
1425 default y
1426 help
1427 This enables the CPUfreq driver for ARM Integrator CPUs.
1428
1429 For details, take a look at <file:Documentation/cpu-freq>.
1430
1431 If in doubt, say Y.
1432
9e2697ff
RK
1433config CPU_FREQ_PXA
1434 bool
1435 depends on CPU_FREQ && ARCH_PXA && PXA25x
1436 default y
1437 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1438
b3748ddd
MB
1439config CPU_FREQ_S3C64XX
1440 bool "CPUfreq support for Samsung S3C64XX CPUs"
1441 depends on CPU_FREQ && CPU_S3C6410
1442
9d56c02a
BD
1443config CPU_FREQ_S3C
1444 bool
1445 help
1446 Internal configuration node for common cpufreq on Samsung SoC
1447
1448config CPU_FREQ_S3C24XX
1449 bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1450 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1451 select CPU_FREQ_S3C
1452 help
1453 This enables the CPUfreq driver for the Samsung S3C24XX family
1454 of CPUs.
1455
1456 For details, take a look at <file:Documentation/cpu-freq>.
1457
1458 If in doubt, say N.
1459
1460config CPU_FREQ_S3C24XX_PLL
1461 bool "Support CPUfreq changing of PLL frequency"
1462 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1463 help
1464 Compile in support for changing the PLL frequency from the
1465 S3C24XX series CPUfreq driver. The PLL takes time to settle
1466 after a frequency change, so by default it is not enabled.
1467
1468 This also means that the PLL tables for the selected CPU(s) will
1469 be built which may increase the size of the kernel image.
1470
1471config CPU_FREQ_S3C24XX_DEBUG
1472 bool "Debug CPUfreq Samsung driver core"
1473 depends on CPU_FREQ_S3C24XX
1474 help
1475 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1476
1477config CPU_FREQ_S3C24XX_IODEBUG
1478 bool "Debug CPUfreq Samsung driver IO timing"
1479 depends on CPU_FREQ_S3C24XX
1480 help
1481 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1482
e6d197a6
BD
1483config CPU_FREQ_S3C24XX_DEBUGFS
1484 bool "Export debugfs for CPUFreq"
1485 depends on CPU_FREQ_S3C24XX && DEBUG_FS
1486 help
1487 Export status information via debugfs.
1488
1da177e4
LT
1489endif
1490
ac9d7efc
RK
1491source "drivers/cpuidle/Kconfig"
1492
1493endmenu
1494
1da177e4
LT
1495menu "Floating point emulation"
1496
1497comment "At least one emulation must be selected"
1498
1499config FPE_NWFPE
1500 bool "NWFPE math emulation"
8993a44c 1501 depends on !AEABI || OABI_COMPAT
1da177e4
LT
1502 ---help---
1503 Say Y to include the NWFPE floating point emulator in the kernel.
1504 This is necessary to run most binaries. Linux does not currently
1505 support floating point hardware so you need to say Y here even if
1506 your machine has an FPA or floating point co-processor podule.
1507
1508 You may say N here if you are going to load the Acorn FPEmulator
1509 early in the bootup.
1510
1511config FPE_NWFPE_XP
1512 bool "Support extended precision"
bedf142b 1513 depends on FPE_NWFPE
1da177e4
LT
1514 help
1515 Say Y to include 80-bit support in the kernel floating-point
1516 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1517 Note that gcc does not generate 80-bit operations by default,
1518 so in most cases this option only enlarges the size of the
1519 floating point emulator without any good reason.
1520
1521 You almost surely want to say N here.
1522
1523config FPE_FASTFPE
1524 bool "FastFPE math emulation (EXPERIMENTAL)"
8993a44c 1525 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1da177e4
LT
1526 ---help---
1527 Say Y here to include the FAST floating point emulator in the kernel.
1528 This is an experimental much faster emulator which now also has full
1529 precision for the mantissa. It does not support any exceptions.
1530 It is very simple, and approximately 3-6 times faster than NWFPE.
1531
1532 It should be sufficient for most programs. It may be not suitable
1533 for scientific calculations, but you have to check this for yourself.
1534 If you do not feel you need a faster FP emulation you should better
1535 choose NWFPE.
1536
1537config VFP
1538 bool "VFP-format floating point maths"
c00d4ffd 1539 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1da177e4
LT
1540 help
1541 Say Y to include VFP support code in the kernel. This is needed
1542 if your hardware includes a VFP unit.
1543
1544 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1545 release notes and additional status information.
1546
1547 Say N if your target does not have VFP hardware.
1548
25ebee02
CM
1549config VFPv3
1550 bool
1551 depends on VFP
1552 default y if CPU_V7
1553
b5872db4
CM
1554config NEON
1555 bool "Advanced SIMD (NEON) Extension support"
1556 depends on VFPv3 && CPU_V7
1557 help
1558 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1559 Extension.
1560
1da177e4
LT
1561endmenu
1562
1563menu "Userspace binary formats"
1564
1565source "fs/Kconfig.binfmt"
1566
1567config ARTHUR
1568 tristate "RISC OS personality"
704bdda0 1569 depends on !AEABI
1da177e4
LT
1570 help
1571 Say Y here to include the kernel code necessary if you want to run
1572 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1573 experimental; if this sounds frightening, say N and sleep in peace.
1574 You can also say M here to compile this support as a module (which
1575 will be called arthur).
1576
1577endmenu
1578
1579menu "Power management options"
1580
eceab4ac 1581source "kernel/power/Kconfig"
1da177e4 1582
f4cb5700
JB
1583config ARCH_SUSPEND_POSSIBLE
1584 def_bool y
1585
1da177e4
LT
1586endmenu
1587
d5950b43
SR
1588source "net/Kconfig"
1589
ac25150f 1590source "drivers/Kconfig"
1da177e4
LT
1591
1592source "fs/Kconfig"
1593
1da177e4
LT
1594source "arch/arm/Kconfig.debug"
1595
1596source "security/Kconfig"
1597
1598source "crypto/Kconfig"
1599
1600source "lib/Kconfig"
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