ARM: 5991/1: Fix regression in restore_user_regs macro
[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
ccd7ab7f
FT
158config NEED_DMA_MAP_STATE
159 def_bool y
160
1da177e4
LT
161config GENERIC_ISA_DMA
162 bool
163
1da177e4
LT
164config FIQ
165 bool
166
034d2f5a
AV
167config ARCH_MTD_XIP
168 bool
169
60a752ef 170config GENERIC_HARDIRQS_NO__DO_IRQ
60a752ef
PZ
171 def_bool y
172
d6d502fa
KK
173config ARM_L1_CACHE_SHIFT_6
174 bool
175 help
176 Setting ARM L1 cache line size to 64 Bytes.
177
c0ffa3a9
MD
178if OPROFILE
179
180config OPROFILE_ARMV6
181 def_bool y
182 depends on CPU_V6 && !SMP
183 select OPROFILE_ARM11_CORE
184
185config OPROFILE_MPCORE
186 def_bool y
187 depends on CPU_V6 && SMP
188 select OPROFILE_ARM11_CORE
189
190config OPROFILE_ARM11_CORE
191 bool
192
d7ac4e28
JP
193config OPROFILE_ARMV7
194 def_bool y
195 depends on CPU_V7 && !SMP
196 bool
197
c0ffa3a9
MD
198endif
199
c760fc19
HC
200config VECTORS_BASE
201 hex
6afd6fae 202 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
c760fc19
HC
203 default DRAM_BASE if REMAP_VECTORS_TO_RAM
204 default 0x00000000
205 help
206 The base address of exception vectors.
207
1da177e4
LT
208source "init/Kconfig"
209
dc52ddc0
MH
210source "kernel/Kconfig.freezer"
211
1da177e4
LT
212menu "System Type"
213
3c427975
HC
214config MMU
215 bool "MMU-based Paged Memory Management Support"
216 default y
217 help
218 Select if you want MMU-based virtualised addressing space
219 support by paged memory management. If unsure, say 'Y'.
220
1da177e4
LT
221choice
222 prompt "ARM system type"
6a0e2430 223 default ARCH_VERSATILE
1da177e4 224
4af6fee1
DS
225config ARCH_AAEC2000
226 bool "Agilent AAEC-2000 based"
c750815e 227 select CPU_ARM920T
4af6fee1 228 select ARM_AMBA
9483a578 229 select HAVE_CLK
4af6fee1
DS
230 help
231 This enables support for systems based on the Agilent AAEC-2000
232
233config ARCH_INTEGRATOR
234 bool "ARM Ltd. Integrator family"
235 select ARM_AMBA
89c52ed4 236 select ARCH_HAS_CPUFREQ
9483a578 237 select HAVE_CLK
d72fbdf0 238 select COMMON_CLKDEV
4af6fee1
DS
239 select ICST525
240 help
241 Support for ARM's Integrator platform.
242
243config ARCH_REALVIEW
244 bool "ARM Ltd. RealView family"
245 select ARM_AMBA
9483a578 246 select HAVE_CLK
cf30fb4a 247 select COMMON_CLKDEV
4af6fee1 248 select ICST307
85802afe 249 select GENERIC_TIME
ae30ceac 250 select GENERIC_CLOCKEVENTS
eb7fffa3 251 select ARCH_WANT_OPTIONAL_GPIOLIB
4af6fee1
DS
252 help
253 This enables support for ARM Ltd RealView boards.
254
255config ARCH_VERSATILE
256 bool "ARM Ltd. Versatile family"
257 select ARM_AMBA
258 select ARM_VIC
9483a578 259 select HAVE_CLK
71a06da0 260 select COMMON_CLKDEV
4af6fee1 261 select ICST307
b49c87c2 262 select GENERIC_TIME
89df1272 263 select GENERIC_CLOCKEVENTS
bbeddc43 264 select ARCH_WANT_OPTIONAL_GPIOLIB
4af6fee1
DS
265 help
266 This enables support for ARM Ltd Versatile board.
267
8fc5ffa0
AV
268config ARCH_AT91
269 bool "Atmel AT91"
0a938b97 270 select GENERIC_GPIO
f373e8c0 271 select ARCH_REQUIRE_GPIOLIB
93686ae8 272 select HAVE_CLK
4af6fee1 273 help
2b3b3516
AV
274 This enables support for systems based on the Atmel AT91RM9200,
275 AT91SAM9 and AT91CAP9 processors.
4af6fee1 276
1da177e4 277config ARCH_CLPS711X
4af6fee1 278 bool "Cirrus Logic CLPS711x/EP721x-based"
c750815e 279 select CPU_ARM720T
f999b8bd
MM
280 help
281 Support for Cirrus Logic 711x/721x based boards.
1da177e4 282
788c9700
RK
283config ARCH_GEMINI
284 bool "Cortina Systems Gemini"
285 select CPU_FA526
286 select GENERIC_GPIO
287 select ARCH_REQUIRE_GPIOLIB
288 help
289 Support for the Cortina Systems Gemini family SoCs
290
1da177e4
LT
291config ARCH_EBSA110
292 bool "EBSA-110"
c750815e 293 select CPU_SA110
f7e68bbf 294 select ISA
c5eb2a2b 295 select NO_IOPORT
1da177e4
LT
296 help
297 This is an evaluation board for the StrongARM processor available
f6c8965a 298 from Digital. It has limited hardware on-board, including an
1da177e4
LT
299 Ethernet interface, two PCMCIA sockets, two serial ports and a
300 parallel port.
301
e7736d47
LB
302config ARCH_EP93XX
303 bool "EP93xx-based"
c750815e 304 select CPU_ARM920T
e7736d47
LB
305 select ARM_AMBA
306 select ARM_VIC
4e9f9fd5 307 select GENERIC_GPIO
9483a578 308 select HAVE_CLK
ae696fd5 309 select COMMON_CLKDEV
7444a72e 310 select ARCH_REQUIRE_GPIOLIB
eb33575c 311 select ARCH_HAS_HOLES_MEMORYMODEL
e7736d47
LB
312 help
313 This enables support for the Cirrus EP93xx series of CPUs.
314
1da177e4
LT
315config ARCH_FOOTBRIDGE
316 bool "FootBridge"
c750815e 317 select CPU_SA110
1da177e4 318 select FOOTBRIDGE
f999b8bd
MM
319 help
320 Support for systems based on the DC21285 companion chip
321 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
1da177e4 322
788c9700
RK
323config ARCH_MXC
324 bool "Freescale MXC/iMX-based"
325 select GENERIC_TIME
326 select GENERIC_CLOCKEVENTS
788c9700 327 select ARCH_REQUIRE_GPIOLIB
a2ab67fa 328 select HAVE_CLK
03e09cd8 329 select COMMON_CLKDEV
788c9700
RK
330 help
331 Support for Freescale MXC/iMX-based family of processors
332
7bd0f2f5 333config ARCH_STMP3XXX
334 bool "Freescale STMP3xxx"
335 select CPU_ARM926T
336 select HAVE_CLK
337 select COMMON_CLKDEV
338 select ARCH_REQUIRE_GPIOLIB
339 select GENERIC_TIME
340 select GENERIC_CLOCKEVENTS
341 select GENERIC_GPIO
342 select USB_ARCH_HAS_EHCI
343 help
344 Support for systems based on the Freescale 3xxx CPUs.
345
4af6fee1
DS
346config ARCH_NETX
347 bool "Hilscher NetX based"
c750815e 348 select CPU_ARM926T
4af6fee1 349 select ARM_VIC
2fcfe6b8 350 select GENERIC_CLOCKEVENTS
21edecd3 351 select GENERIC_TIME
f999b8bd 352 help
4af6fee1
DS
353 This enables support for systems based on the Hilscher NetX Soc
354
355config ARCH_H720X
356 bool "Hynix HMS720x-based"
c750815e 357 select CPU_ARM720T
4af6fee1
DS
358 select ISA_DMA_API
359 help
360 This enables support for systems based on the Hynix HMS720x
361
28ad94ec
AR
362config ARCH_NOMADIK
363 bool "STMicroelectronics Nomadik"
364 select ARM_AMBA
365 select ARM_VIC
366 select CPU_ARM926T
367 select HAVE_CLK
368 select COMMON_CLKDEV
369 select GENERIC_TIME
370 select GENERIC_CLOCKEVENTS
2ec1d359
AR
371 select GENERIC_GPIO
372 select ARCH_REQUIRE_GPIOLIB
28ad94ec
AR
373 help
374 Support for the Nomadik platform by ST-Ericsson
375
3b938be6
RK
376config ARCH_IOP13XX
377 bool "IOP13xx-based"
378 depends on MMU
c750815e 379 select CPU_XSC3
3b938be6
RK
380 select PLAT_IOP
381 select PCI
382 select ARCH_SUPPORTS_MSI
8d5796d2 383 select VMSPLIT_1G
3b938be6
RK
384 help
385 Support for Intel's IOP13XX (XScale) family of processors.
386
3f7e5815
LB
387config ARCH_IOP32X
388 bool "IOP32x-based"
a4f7e763 389 depends on MMU
c750815e 390 select CPU_XSCALE
7ae1f7ec 391 select PLAT_IOP
f7e68bbf 392 select PCI
63f385cd 393 select GENERIC_GPIO
bb2b180c 394 select ARCH_REQUIRE_GPIOLIB
f999b8bd 395 help
3f7e5815
LB
396 Support for Intel's 80219 and IOP32X (XScale) family of
397 processors.
398
399config ARCH_IOP33X
400 bool "IOP33x-based"
401 depends on MMU
c750815e 402 select CPU_XSCALE
7ae1f7ec 403 select PLAT_IOP
3f7e5815 404 select PCI
63f385cd 405 select GENERIC_GPIO
bb2b180c 406 select ARCH_REQUIRE_GPIOLIB
3f7e5815
LB
407 help
408 Support for Intel's IOP33X (XScale) family of processors.
1da177e4 409
3b938be6
RK
410config ARCH_IXP23XX
411 bool "IXP23XX-based"
a4f7e763 412 depends on MMU
c750815e 413 select CPU_XSC3
3b938be6 414 select PCI
f999b8bd 415 help
3b938be6 416 Support for Intel's IXP23xx (XScale) family of processors.
1da177e4
LT
417
418config ARCH_IXP2000
419 bool "IXP2400/2800-based"
a4f7e763 420 depends on MMU
c750815e 421 select CPU_XSCALE
f7e68bbf 422 select PCI
f999b8bd
MM
423 help
424 Support for Intel's IXP2400/2800 (XScale) family of processors.
1da177e4 425
3b938be6
RK
426config ARCH_IXP4XX
427 bool "IXP4xx-based"
a4f7e763 428 depends on MMU
c750815e 429 select CPU_XSCALE
8858e9af 430 select GENERIC_GPIO
3b938be6
RK
431 select GENERIC_TIME
432 select GENERIC_CLOCKEVENTS
485bdde7 433 select DMABOUNCE if PCI
c4713074 434 help
3b938be6 435 Support for Intel's IXP4XX (XScale) family of processors.
c4713074 436
1da177e4
LT
437config ARCH_L7200
438 bool "LinkUp-L7200"
c750815e 439 select CPU_ARM720T
1da177e4
LT
440 select FIQ
441 help
442 Say Y here if you intend to run this kernel on a LinkUp Systems
443 L7200 Software Development Board which uses an ARM720T processor.
444 Information on this board can be obtained at:
445
446 <http://www.linkupsys.com/>
447
448 If you have any questions or comments about the Linux kernel port
449 to this board, send e-mail to <sjhill@cotw.com>.
450
edabd38e
SB
451config ARCH_DOVE
452 bool "Marvell Dove"
453 select PCI
454 select GENERIC_GPIO
455 select ARCH_REQUIRE_GPIOLIB
456 select GENERIC_TIME
457 select GENERIC_CLOCKEVENTS
458 select PLAT_ORION
459 help
460 Support for the Marvell Dove SoC 88AP510
461
651c74c7
SB
462config ARCH_KIRKWOOD
463 bool "Marvell Kirkwood"
c750815e 464 select CPU_FEROCEON
651c74c7 465 select PCI
4c213430 466 select GENERIC_GPIO
a8865655 467 select ARCH_REQUIRE_GPIOLIB
651c74c7
SB
468 select GENERIC_TIME
469 select GENERIC_CLOCKEVENTS
470 select PLAT_ORION
471 help
472 Support for the following Marvell Kirkwood series SoCs:
473 88F6180, 88F6192 and 88F6281.
474
777f9beb
LB
475config ARCH_LOKI
476 bool "Marvell Loki (88RC8480)"
c750815e 477 select CPU_FEROCEON
777f9beb
LB
478 select GENERIC_TIME
479 select GENERIC_CLOCKEVENTS
480 select PLAT_ORION
481 help
482 Support for the Marvell Loki (88RC8480) SoC.
483
794d15b2
SS
484config ARCH_MV78XX0
485 bool "Marvell MV78xx0"
c750815e 486 select CPU_FEROCEON
794d15b2 487 select PCI
b95a13d7 488 select GENERIC_GPIO
a8865655 489 select ARCH_REQUIRE_GPIOLIB
794d15b2
SS
490 select GENERIC_TIME
491 select GENERIC_CLOCKEVENTS
492 select PLAT_ORION
493 help
494 Support for the following Marvell MV78xx0 series SoCs:
495 MV781x0, MV782x0.
496
9dd0b194 497config ARCH_ORION5X
585cf175
TP
498 bool "Marvell Orion"
499 depends on MMU
c750815e 500 select CPU_FEROCEON
038ee083 501 select PCI
01af72e4 502 select GENERIC_GPIO
a8865655 503 select ARCH_REQUIRE_GPIOLIB
51cbff1d
TP
504 select GENERIC_TIME
505 select GENERIC_CLOCKEVENTS
69b02f6a 506 select PLAT_ORION
585cf175 507 help
9dd0b194 508 Support for the following Marvell Orion 5x series SoCs:
d2b2a6bb 509 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
d323ade1 510 Orion-2 (5281), Orion-1-90 (6183).
585cf175 511
788c9700 512config ARCH_MMP
2f7e8fae 513 bool "Marvell PXA168/910/MMP2"
788c9700
RK
514 depends on MMU
515 select GENERIC_GPIO
516 select ARCH_REQUIRE_GPIOLIB
517 select HAVE_CLK
518 select COMMON_CLKDEV
519 select GENERIC_TIME
520 select GENERIC_CLOCKEVENTS
521 select TICK_ONESHOT
522 select PLAT_PXA
523 help
2f7e8fae 524 Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
788c9700
RK
525
526config ARCH_KS8695
527 bool "Micrel/Kendin KS8695"
528 select CPU_ARM922T
529 select GENERIC_GPIO
530 select ARCH_REQUIRE_GPIOLIB
531 help
532 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
533 System-on-Chip devices.
534
535config ARCH_NS9XXX
536 bool "NetSilicon NS9xxx"
537 select CPU_ARM926T
538 select GENERIC_GPIO
539 select GENERIC_TIME
540 select GENERIC_CLOCKEVENTS
541 select HAVE_CLK
542 help
543 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
544 System.
545
546 <http://www.digi.com/products/microprocessors/index.jsp>
547
548config ARCH_W90X900
549 bool "Nuvoton W90X900 CPU"
550 select CPU_ARM926T
c52d3d68 551 select ARCH_REQUIRE_GPIOLIB
552 select GENERIC_GPIO
d2c24195 553 select HAVE_CLK
0e4a34bb 554 select COMMON_CLKDEV
58b5369e 555 select GENERIC_TIME
556 select GENERIC_CLOCKEVENTS
788c9700 557 help
a8bc4ead 558 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
559 At present, the w90x900 has been renamed nuc900, regarding
560 the ARM series product line, you can login the following
561 link address to know more.
562
563 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
564 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
788c9700 565
a62e9030 566config ARCH_NUC93X
567 bool "Nuvoton NUC93X CPU"
568 select CPU_ARM926T
569 select HAVE_CLK
570 select COMMON_CLKDEV
571 help
572 Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
573 low-power and high performance MPEG-4/JPEG multimedia controller chip.
574
4af6fee1
DS
575config ARCH_PNX4008
576 bool "Philips Nexperia PNX4008 Mobile"
c750815e 577 select CPU_ARM926T
9483a578 578 select HAVE_CLK
6985a5ad 579 select COMMON_CLKDEV
4af6fee1
DS
580 help
581 This enables support for Philips PNX4008 mobile platform.
582
1da177e4 583config ARCH_PXA
2c8086a5 584 bool "PXA2xx/PXA3xx-based"
a4f7e763 585 depends on MMU
034d2f5a 586 select ARCH_MTD_XIP
89c52ed4 587 select ARCH_HAS_CPUFREQ
0a938b97 588 select GENERIC_GPIO
9483a578 589 select HAVE_CLK
8c3abc7d 590 select COMMON_CLKDEV
7444a72e 591 select ARCH_REQUIRE_GPIOLIB
45cf5eef 592 select GENERIC_TIME
981d0f39 593 select GENERIC_CLOCKEVENTS
a88264c2 594 select TICK_ONESHOT
bd5ce433 595 select PLAT_PXA
f999b8bd 596 help
2c8086a5 597 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
1da177e4 598
788c9700
RK
599config ARCH_MSM
600 bool "Qualcomm MSM"
601 select CPU_V6
49cbe786
EM
602 select GENERIC_TIME
603 select GENERIC_CLOCKEVENTS
49cbe786 604 help
788c9700
RK
605 Support for Qualcomm MSM7K based systems. This runs on the ARM11
606 apps processor of the MSM7K and depends on a shared memory
607 interface to the ARM9 modem processor which runs the baseband stack
608 and controls some vital subsystems (clock and power control, etc).
49cbe786 609
c793c1b0
MD
610config ARCH_SHMOBILE
611 bool "Renesas SH-Mobile"
612 help
613 Support for Renesas's SH-Mobile ARM platforms
614
1da177e4
LT
615config ARCH_RPC
616 bool "RiscPC"
617 select ARCH_ACORN
618 select FIQ
619 select TIMER_ACORN
a08b6b79 620 select ARCH_MAY_HAVE_PC_FDC
341eb781 621 select HAVE_PATA_PLATFORM
065909b9 622 select ISA_DMA_API
5ea81769 623 select NO_IOPORT
07f841b7 624 select ARCH_SPARSEMEM_ENABLE
1da177e4
LT
625 help
626 On the Acorn Risc-PC, Linux can support the internal IDE disk and
627 CD-ROM interface, serial and parallel port, and the floppy drive.
628
629config ARCH_SA1100
630 bool "SA1100-based"
c750815e 631 select CPU_SA1100
f7e68bbf 632 select ISA
05944d74 633 select ARCH_SPARSEMEM_ENABLE
034d2f5a 634 select ARCH_MTD_XIP
89c52ed4 635 select ARCH_HAS_CPUFREQ
1937f5b9 636 select CPU_FREQ
0a938b97 637 select GENERIC_GPIO
d142b6e7 638 select GENERIC_TIME
3e238be2 639 select GENERIC_CLOCKEVENTS
9483a578 640 select HAVE_CLK
3e238be2 641 select TICK_ONESHOT
7444a72e 642 select ARCH_REQUIRE_GPIOLIB
f999b8bd
MM
643 help
644 Support for StrongARM 11x0 based boards.
1da177e4
LT
645
646config ARCH_S3C2410
e4d06e39 647 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
0a938b97 648 select GENERIC_GPIO
9d56c02a 649 select ARCH_HAS_CPUFREQ
9483a578 650 select HAVE_CLK
1da177e4
LT
651 help
652 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
653 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
f6c8965a 654 the Samsung SMDK2410 development board (and derivatives).
1da177e4 655
a08ab637
BD
656config ARCH_S3C64XX
657 bool "Samsung S3C64XX"
89f1fa08 658 select PLAT_SAMSUNG
89f0ce72 659 select CPU_V6
a08ab637 660 select GENERIC_GPIO
89f0ce72 661 select ARM_VIC
a08ab637 662 select HAVE_CLK
89f0ce72 663 select NO_IOPORT
89c52ed4 664 select ARCH_HAS_CPUFREQ
89f0ce72
BD
665 select ARCH_REQUIRE_GPIOLIB
666 select SAMSUNG_CLKSRC
667 select SAMSUNG_IRQ_VIC_TIMER
668 select SAMSUNG_IRQ_UART
669 select S3C_GPIO_TRACK
670 select S3C_GPIO_PULL_UPDOWN
671 select S3C_GPIO_CFG_S3C24XX
672 select S3C_GPIO_CFG_S3C64XX
673 select S3C_DEV_NAND
674 select USB_ARCH_HAS_OHCI
675 select SAMSUNG_GPIOLIB_4BIT
a08ab637
BD
676 help
677 Samsung S3C64XX series based systems
678
c4ffccdd
KK
679config ARCH_S5P6440
680 bool "Samsung S5P6440"
681 select CPU_V6
682 select GENERIC_GPIO
683 select HAVE_CLK
684 help
685 Samsung S5P6440 CPU based systems
686
550db7f1
KK
687config ARCH_S5P6442
688 bool "Samsung S5P6442"
689 select CPU_V6
690 select GENERIC_GPIO
691 select HAVE_CLK
692 help
693 Samsung S5P6442 CPU based systems
694
5a7652f2
BM
695config ARCH_S5PC1XX
696 bool "Samsung S5PC1XX"
697 select GENERIC_GPIO
698 select HAVE_CLK
699 select CPU_V7
d6d502fa 700 select ARM_L1_CACHE_SHIFT_6
5a7652f2
BM
701 help
702 Samsung S5PC1XX series based systems
703
170f4e42
KK
704config ARCH_S5PV210
705 bool "Samsung S5PV210/S5PC110"
706 select CPU_V7
707 select GENERIC_GPIO
708 select HAVE_CLK
709 select ARM_L1_CACHE_SHIFT_6
710 help
711 Samsung S5PV210/S5PC110 series based systems
712
1da177e4
LT
713config ARCH_SHARK
714 bool "Shark"
c750815e 715 select CPU_SA110
f7e68bbf
RK
716 select ISA
717 select ISA_DMA
3bca103a 718 select ZONE_DMA
f7e68bbf 719 select PCI
f999b8bd
MM
720 help
721 Support for the StrongARM based Digital DNARD machine, also known
722 as "Shark" (<http://www.shark-linux.de/shark.html>).
1da177e4
LT
723
724config ARCH_LH7A40X
725 bool "Sharp LH7A40X"
c750815e 726 select CPU_ARM922T
4ba3f7c5
RK
727 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
728 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
1da177e4
LT
729 help
730 Say Y here for systems based on one of the Sharp LH7A40X
731 System on a Chip processors. These CPUs include an ARM922T
732 core with a wide array of integrated devices for
733 hand-held and low-power applications.
734
d98aac75
LW
735config ARCH_U300
736 bool "ST-Ericsson U300 Series"
737 depends on MMU
738 select CPU_ARM926T
bc581770 739 select HAVE_TCM
d98aac75
LW
740 select ARM_AMBA
741 select ARM_VIC
742 select GENERIC_TIME
743 select GENERIC_CLOCKEVENTS
744 select HAVE_CLK
745 select COMMON_CLKDEV
746 select GENERIC_GPIO
747 help
748 Support for ST-Ericsson U300 series mobile platforms.
749
7c6337e2
KH
750config ARCH_DAVINCI
751 bool "TI DaVinci"
c750815e 752 select CPU_ARM926T
7c6337e2
KH
753 select GENERIC_TIME
754 select GENERIC_CLOCKEVENTS
3d9edf09 755 select GENERIC_GPIO
dce1115b 756 select ARCH_REQUIRE_GPIOLIB
9483a578 757 select HAVE_CLK
3bca103a 758 select ZONE_DMA
9232fcc9 759 select HAVE_IDE
c5b736d0 760 select COMMON_CLKDEV
20e9969b 761 select GENERIC_ALLOCATOR
ae88e05a 762 select ARCH_HAS_HOLES_MEMORYMODEL
7c6337e2
KH
763 help
764 Support for TI's DaVinci platform.
765
3b938be6
RK
766config ARCH_OMAP
767 bool "TI OMAP"
768 select GENERIC_GPIO
9483a578 769 select HAVE_CLK
7444a72e 770 select ARCH_REQUIRE_GPIOLIB
89c52ed4 771 select ARCH_HAS_CPUFREQ
3b938be6 772 select GENERIC_TIME
06cad098 773 select GENERIC_CLOCKEVENTS
9af915da 774 select ARCH_HAS_HOLES_MEMORYMODEL
3b938be6
RK
775 help
776 Support for TI's OMAP platform (OMAP1 and OMAP2).
777
6288e28d
LC
778config ARCH_BCMRING
779 bool "Broadcom BCMRING"
780 depends on MMU
781 select CPU_V6
782 select ARM_AMBA
783 select COMMON_CLKDEV
784 select GENERIC_TIME
785 select GENERIC_CLOCKEVENTS
786 select ARCH_WANT_OPTIONAL_GPIOLIB
787 help
788 Support for Broadcom's BCMRing platform.
789
850265e8
SK
790config ARCH_U8500
791 bool "ST-Ericsson U8500 Series"
792 select CPU_V7
793 select ARM_AMBA
794 select GENERIC_TIME
795 select GENERIC_CLOCKEVENTS
796 select COMMON_CLKDEV
797 help
798 Support for ST-Ericsson's Ux500 architecture
799
1da177e4
LT
800endchoice
801
95b8f20f
RK
802source "arch/arm/mach-aaec2000/Kconfig"
803
804source "arch/arm/mach-at91/Kconfig"
805
806source "arch/arm/mach-bcmring/Kconfig"
807
1da177e4
LT
808source "arch/arm/mach-clps711x/Kconfig"
809
95b8f20f
RK
810source "arch/arm/mach-davinci/Kconfig"
811
812source "arch/arm/mach-dove/Kconfig"
813
e7736d47
LB
814source "arch/arm/mach-ep93xx/Kconfig"
815
1da177e4
LT
816source "arch/arm/mach-footbridge/Kconfig"
817
59d3a193
PZ
818source "arch/arm/mach-gemini/Kconfig"
819
95b8f20f
RK
820source "arch/arm/mach-h720x/Kconfig"
821
1da177e4
LT
822source "arch/arm/mach-integrator/Kconfig"
823
3f7e5815
LB
824source "arch/arm/mach-iop32x/Kconfig"
825
826source "arch/arm/mach-iop33x/Kconfig"
1da177e4 827
285f5fa7
DW
828source "arch/arm/mach-iop13xx/Kconfig"
829
1da177e4
LT
830source "arch/arm/mach-ixp4xx/Kconfig"
831
832source "arch/arm/mach-ixp2000/Kconfig"
833
c4713074
LB
834source "arch/arm/mach-ixp23xx/Kconfig"
835
95b8f20f
RK
836source "arch/arm/mach-kirkwood/Kconfig"
837
838source "arch/arm/mach-ks8695/Kconfig"
839
840source "arch/arm/mach-lh7a40x/Kconfig"
841
777f9beb
LB
842source "arch/arm/mach-loki/Kconfig"
843
95b8f20f
RK
844source "arch/arm/mach-msm/Kconfig"
845
794d15b2
SS
846source "arch/arm/mach-mv78xx0/Kconfig"
847
95b8f20f 848source "arch/arm/plat-mxc/Kconfig"
1da177e4 849
95b8f20f 850source "arch/arm/mach-netx/Kconfig"
49cbe786 851
95b8f20f
RK
852source "arch/arm/mach-nomadik/Kconfig"
853source "arch/arm/plat-nomadik/Kconfig"
854
855source "arch/arm/mach-ns9xxx/Kconfig"
1da177e4 856
186f93ea 857source "arch/arm/mach-nuc93x/Kconfig"
1da177e4 858
d48af15e
TL
859source "arch/arm/plat-omap/Kconfig"
860
861source "arch/arm/mach-omap1/Kconfig"
1da177e4 862
1dbae815
TL
863source "arch/arm/mach-omap2/Kconfig"
864
9dd0b194 865source "arch/arm/mach-orion5x/Kconfig"
585cf175 866
95b8f20f
RK
867source "arch/arm/mach-pxa/Kconfig"
868source "arch/arm/plat-pxa/Kconfig"
585cf175 869
95b8f20f
RK
870source "arch/arm/mach-mmp/Kconfig"
871
872source "arch/arm/mach-realview/Kconfig"
873
874source "arch/arm/mach-sa1100/Kconfig"
edabd38e 875
cf383678 876source "arch/arm/plat-samsung/Kconfig"
a21765a7 877source "arch/arm/plat-s3c24xx/Kconfig"
c4ffccdd 878source "arch/arm/plat-s5p/Kconfig"
5a7652f2 879source "arch/arm/plat-s5pc1xx/Kconfig"
a21765a7
BD
880
881if ARCH_S3C2410
882source "arch/arm/mach-s3c2400/Kconfig"
1da177e4 883source "arch/arm/mach-s3c2410/Kconfig"
a21765a7
BD
884source "arch/arm/mach-s3c2412/Kconfig"
885source "arch/arm/mach-s3c2440/Kconfig"
e4d06e39 886source "arch/arm/mach-s3c2443/Kconfig"
a21765a7 887endif
1da177e4 888
a08ab637 889if ARCH_S3C64XX
431107ea 890source "arch/arm/mach-s3c64xx/Kconfig"
a08ab637
BD
891endif
892
c4ffccdd
KK
893source "arch/arm/mach-s5p6440/Kconfig"
894
550db7f1 895source "arch/arm/mach-s5p6442/Kconfig"
7bd0f2f5 896
5a7652f2
BM
897if ARCH_S5PC1XX
898source "arch/arm/mach-s5pc100/Kconfig"
899endif
900
170f4e42
KK
901source "arch/arm/mach-s5pv210/Kconfig"
902
882d01f9 903source "arch/arm/mach-shmobile/Kconfig"
52c543f9 904
882d01f9 905source "arch/arm/plat-stmp3xxx/Kconfig"
9e73c84c 906
95b8f20f 907source "arch/arm/mach-u300/Kconfig"
1da177e4 908
95b8f20f 909source "arch/arm/mach-ux500/Kconfig"
1da177e4
LT
910
911source "arch/arm/mach-versatile/Kconfig"
912
7ec80ddf 913source "arch/arm/mach-w90x900/Kconfig"
914
1da177e4
LT
915# Definitions to make life easier
916config ARCH_ACORN
917 bool
918
7ae1f7ec
LB
919config PLAT_IOP
920 bool
469d3044 921 select GENERIC_CLOCKEVENTS
980f2296 922 select GENERIC_TIME
7ae1f7ec 923
69b02f6a
LB
924config PLAT_ORION
925 bool
926
bd5ce433
EM
927config PLAT_PXA
928 bool
929
1da177e4
LT
930source arch/arm/mm/Kconfig
931
afe4b25e
LB
932config IWMMXT
933 bool "Enable iWMMXt support"
40305a58
EM
934 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
935 default y if PXA27x || PXA3xx || ARCH_MMP
afe4b25e
LB
936 help
937 Enable support for iWMMXt context switching at run time if
938 running on a CPU that supports it.
939
1da177e4
LT
940# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
941config XSCALE_PMU
942 bool
943 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
944 default y
945
0f4f0672
JI
946config CPU_HAS_PMU
947 depends on CPU_V6 || CPU_V7 || XSCALE_PMU
948 default y
949 bool
950
3b93e7b0
HC
951if !MMU
952source "arch/arm/Kconfig-nommu"
953endif
954
9cba3ccc
CM
955config ARM_ERRATA_411920
956 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
957 depends on CPU_V6 && !SMP
958 help
959 Invalidation of the Instruction Cache operation can
960 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
961 It does not affect the MPCore. This option enables the ARM Ltd.
962 recommended workaround.
963
7ce236fc
CM
964config ARM_ERRATA_430973
965 bool "ARM errata: Stale prediction on replaced interworking branch"
966 depends on CPU_V7
967 help
968 This option enables the workaround for the 430973 Cortex-A8
969 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
970 interworking branch is replaced with another code sequence at the
971 same virtual address, whether due to self-modifying code or virtual
972 to physical address re-mapping, Cortex-A8 does not recover from the
973 stale interworking branch prediction. This results in Cortex-A8
974 executing the new code sequence in the incorrect ARM or Thumb state.
975 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
976 and also flushes the branch target cache at every context switch.
977 Note that setting specific bits in the ACTLR register may not be
978 available in non-secure mode.
979
855c551f
CM
980config ARM_ERRATA_458693
981 bool "ARM errata: Processor deadlock when a false hazard is created"
982 depends on CPU_V7
983 help
984 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
985 erratum. For very specific sequences of memory operations, it is
986 possible for a hazard condition intended for a cache line to instead
987 be incorrectly associated with a different cache line. This false
988 hazard might then cause a processor deadlock. The workaround enables
989 the L1 caching of the NEON accesses and disables the PLD instruction
990 in the ACTLR register. Note that setting specific bits in the ACTLR
991 register may not be available in non-secure mode.
992
0516e464
CM
993config ARM_ERRATA_460075
994 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
995 depends on CPU_V7
996 help
997 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
998 erratum. Any asynchronous access to the L2 cache may encounter a
999 situation in which recent store transactions to the L2 cache are lost
1000 and overwritten with stale memory contents from external memory. The
1001 workaround disables the write-allocate mode for the L2 cache via the
1002 ACTLR register. Note that setting specific bits in the ACTLR register
1003 may not be available in non-secure mode.
1004
9e65582a
SS
1005config PL310_ERRATA_588369
1006 bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1007 depends on CACHE_L2X0 && ARCH_OMAP4
1008 help
1009 The PL310 L2 cache controller implements three types of Clean &
1010 Invalidate maintenance operations: by Physical Address
1011 (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1012 They are architecturally defined to behave as the execution of a
1013 clean operation followed immediately by an invalidate operation,
1014 both performing to the same memory location. This functionality
1015 is not correctly implemented in PL310 as clean lines are not
1016 invalidated as a result of these operations. Note that this errata
1017 uses Texas Instrument's secure monitor api.
1da177e4
LT
1018endmenu
1019
1020source "arch/arm/common/Kconfig"
1021
1022config FORCE_MAX_ZONEORDER
1023 int
1024 depends on SA1111
1025 default "9"
1026
1027menu "Bus support"
1028
1029config ARM_AMBA
1030 bool
1031
1032config ISA
1033 bool
1da177e4
LT
1034 help
1035 Find out whether you have ISA slots on your motherboard. ISA is the
1036 name of a bus system, i.e. the way the CPU talks to the other stuff
1037 inside your box. Other bus systems are PCI, EISA, MicroChannel
1038 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1039 newer boards don't support it. If you have ISA, say Y, otherwise N.
1040
065909b9 1041# Select ISA DMA controller support
1da177e4
LT
1042config ISA_DMA
1043 bool
065909b9 1044 select ISA_DMA_API
1da177e4 1045
065909b9 1046# Select ISA DMA interface
5cae841b
AV
1047config ISA_DMA_API
1048 bool
5cae841b 1049
1da177e4 1050config PCI
a0113a99 1051 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
1da177e4
LT
1052 help
1053 Find out whether you have a PCI motherboard. PCI is the name of a
1054 bus system, i.e. the way the CPU talks to the other stuff inside
1055 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1056 VESA. If you have PCI, say Y, otherwise N.
1057
36e23590
MW
1058config PCI_SYSCALL
1059 def_bool PCI
1060
1da177e4
LT
1061# Select the host bridge type
1062config PCI_HOST_VIA82C505
1063 bool
1064 depends on PCI && ARCH_SHARK
1065 default y
1066
a0113a99
MR
1067config PCI_HOST_ITE8152
1068 bool
1069 depends on PCI && MACH_ARMCORE
1070 default y
1071 select DMABOUNCE
1072
1da177e4
LT
1073source "drivers/pci/Kconfig"
1074
1075source "drivers/pcmcia/Kconfig"
1076
1077endmenu
1078
1079menu "Kernel Features"
1080
0567a0c0
KH
1081source "kernel/time/Kconfig"
1082
1da177e4
LT
1083config SMP
1084 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
42578c82 1085 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
850265e8 1086 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
bc28248e 1087 depends on GENERIC_CLOCKEVENTS
f6dd9fa5 1088 select USE_GENERIC_SMP_HELPERS
850265e8 1089 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1da177e4
LT
1090 help
1091 This enables support for systems with more than one CPU. If you have
1092 a system with only one CPU, like most personal computers, say N. If
1093 you have a system with more than one CPU, say Y.
1094
1095 If you say N here, the kernel will run on single and multiprocessor
1096 machines, but will use only one CPU of a multiprocessor machine. If
1097 you say Y here, the kernel will run on many, but not all, single
1098 processor machines. On a single processor machine, the kernel will
1099 run faster if you say N here.
1100
03502faa 1101 See also <file:Documentation/i386/IO-APIC.txt>,
1da177e4
LT
1102 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1103 <http://www.linuxdoc.org/docs.html#howto>.
1104
1105 If you don't know what to do here, say N.
1106
a8cbcd92
RK
1107config HAVE_ARM_SCU
1108 bool
1109 depends on SMP
1110 help
1111 This option enables support for the ARM system coherency unit
1112
f32f4ce2
RK
1113config HAVE_ARM_TWD
1114 bool
1115 depends on SMP
1116 help
1117 This options enables support for the ARM timer and watchdog unit
1118
8d5796d2
LB
1119choice
1120 prompt "Memory split"
1121 default VMSPLIT_3G
1122 help
1123 Select the desired split between kernel and user memory.
1124
1125 If you are not absolutely sure what you are doing, leave this
1126 option alone!
1127
1128 config VMSPLIT_3G
1129 bool "3G/1G user/kernel split"
1130 config VMSPLIT_2G
1131 bool "2G/2G user/kernel split"
1132 config VMSPLIT_1G
1133 bool "1G/3G user/kernel split"
1134endchoice
1135
1136config PAGE_OFFSET
1137 hex
1138 default 0x40000000 if VMSPLIT_1G
1139 default 0x80000000 if VMSPLIT_2G
1140 default 0xC0000000
1141
1da177e4
LT
1142config NR_CPUS
1143 int "Maximum number of CPUs (2-32)"
1144 range 2 32
1145 depends on SMP
1146 default "4"
1147
a054a811
RK
1148config HOTPLUG_CPU
1149 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1150 depends on SMP && HOTPLUG && EXPERIMENTAL
1151 help
1152 Say Y here to experiment with turning CPUs off and on. CPUs
1153 can be controlled through /sys/devices/system/cpu.
1154
37ee16ae
RK
1155config LOCAL_TIMERS
1156 bool "Use local timer interrupts"
42578c82 1157 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
850265e8 1158 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
37ee16ae 1159 default y
850265e8 1160 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
37ee16ae
RK
1161 help
1162 Enable support for local timers on SMP platforms, rather then the
1163 legacy IPI broadcast method. Local timers allows the system
1164 accounting to be spread across the timer interval, preventing a
1165 "thundering herd" at every timer tick.
1166
d45a398f 1167source kernel/Kconfig.preempt
1da177e4 1168
f8065813
RK
1169config HZ
1170 int
1171 default 128 if ARCH_L7200
170f4e42 1172 default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
bfe65704 1173 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
5248c657 1174 default AT91_TIMER_HZ if ARCH_AT91
f8065813
RK
1175 default 100
1176
16c79651
CM
1177config THUMB2_KERNEL
1178 bool "Compile the kernel in Thumb-2 mode"
1179 depends on CPU_V7 && EXPERIMENTAL
1180 select AEABI
1181 select ARM_ASM_UNIFIED
1182 help
1183 By enabling this option, the kernel will be compiled in
1184 Thumb-2 mode. A compiler/assembler that understand the unified
1185 ARM-Thumb syntax is needed.
1186
1187 If unsure, say N.
1188
0becb088
CM
1189config ARM_ASM_UNIFIED
1190 bool
1191
704bdda0
NP
1192config AEABI
1193 bool "Use the ARM EABI to compile the kernel"
1194 help
1195 This option allows for the kernel to be compiled using the latest
1196 ARM ABI (aka EABI). This is only useful if you are using a user
1197 space environment that is also compiled with EABI.
1198
1199 Since there are major incompatibilities between the legacy ABI and
1200 EABI, especially with regard to structure member alignment, this
1201 option also changes the kernel syscall calling convention to
1202 disambiguate both ABIs and allow for backward compatibility support
1203 (selected with CONFIG_OABI_COMPAT).
1204
1205 To use this you need GCC version 4.0.0 or later.
1206
6c90c872 1207config OABI_COMPAT
a73a3ff1 1208 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
61c484d4 1209 depends on AEABI && EXPERIMENTAL
6c90c872
NP
1210 default y
1211 help
1212 This option preserves the old syscall interface along with the
1213 new (ARM EABI) one. It also provides a compatibility layer to
1214 intercept syscalls that have structure arguments which layout
1215 in memory differs between the legacy ABI and the new ARM EABI
1216 (only for non "thumb" binaries). This option adds a tiny
1217 overhead to all syscalls and produces a slightly larger kernel.
1218 If you know you'll be using only pure EABI user space then you
1219 can say N here. If this option is not selected and you attempt
1220 to execute a legacy ABI binary then the result will be
1221 UNPREDICTABLE (in fact it can be predicted that it won't work
1222 at all). If in doubt say Y.
1223
eb33575c 1224config ARCH_HAS_HOLES_MEMORYMODEL
e80d6a24 1225 bool
e80d6a24 1226
07a2f737 1227# Discontigmem is deprecated
3f22ab27 1228config ARCH_DISCONTIGMEM_ENABLE
1da177e4 1229 bool
1da177e4 1230
05944d74
RK
1231config ARCH_SPARSEMEM_ENABLE
1232 bool
1233
07a2f737
RK
1234config ARCH_SPARSEMEM_DEFAULT
1235 def_bool ARCH_SPARSEMEM_ENABLE
1236
05944d74 1237config ARCH_SELECT_MEMORY_MODEL
07a2f737 1238 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
05944d74 1239
c80d79d7
YG
1240config NODES_SHIFT
1241 int
1242 default "4" if ARCH_LH7A40X
1243 default "2"
1244 depends on NEED_MULTIPLE_NODES
1245
053a96ca
NP
1246config HIGHMEM
1247 bool "High Memory Support (EXPERIMENTAL)"
1248 depends on MMU && EXPERIMENTAL
1249 help
1250 The address space of ARM processors is only 4 Gigabytes large
1251 and it has to accommodate user address space, kernel address
1252 space as well as some memory mapped IO. That means that, if you
1253 have a large amount of physical memory and/or IO, not all of the
1254 memory can be "permanently mapped" by the kernel. The physical
1255 memory that is not permanently mapped is called "high memory".
1256
1257 Depending on the selected kernel/user memory split, minimum
1258 vmalloc space and actual amount of RAM, you may not need this
1259 option which should result in a slightly faster kernel.
1260
1261 If unsure, say n.
1262
65cec8e3
RK
1263config HIGHPTE
1264 bool "Allocate 2nd-level pagetables from highmem"
1265 depends on HIGHMEM
1266 depends on !OUTER_CACHE
1267
1b8873a0
JI
1268config HW_PERF_EVENTS
1269 bool "Enable hardware performance counter support for perf events"
796d1295 1270 depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
1b8873a0
JI
1271 default y
1272 help
1273 Enable hardware performance counter support for perf events. If
1274 disabled, perf events will use software events only.
1275
3f22ab27
DH
1276source "mm/Kconfig"
1277
1da177e4
LT
1278config LEDS
1279 bool "Timer and CPU usage LEDs"
e055d5bf 1280 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
8c8fdbc9 1281 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1da177e4
LT
1282 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1283 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
73a59c1c 1284 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
25329671 1285 ARCH_AT91 || ARCH_DAVINCI || \
ff3042fb 1286 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1da177e4
LT
1287 help
1288 If you say Y here, the LEDs on your machine will be used
1289 to provide useful information about your current system status.
1290
1291 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1292 be able to select which LEDs are active using the options below. If
1293 you are compiling a kernel for the EBSA-110 or the LART however, the
1294 red LED will simply flash regularly to indicate that the system is
1295 still functional. It is safe to say Y here if you have a CATS
1296 system, but the driver will do nothing.
1297
1298config LEDS_TIMER
1299 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
eebdf7d7
DB
1300 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1301 || MACH_OMAP_PERSEUS2
1da177e4 1302 depends on LEDS
0567a0c0 1303 depends on !GENERIC_CLOCKEVENTS
1da177e4
LT
1304 default y if ARCH_EBSA110
1305 help
1306 If you say Y here, one of the system LEDs (the green one on the
1307 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1308 will flash regularly to indicate that the system is still
1309 operational. This is mainly useful to kernel hackers who are
1310 debugging unstable kernels.
1311
1312 The LART uses the same LED for both Timer LED and CPU usage LED
1313 functions. You may choose to use both, but the Timer LED function
1314 will overrule the CPU usage LED.
1315
1316config LEDS_CPU
1317 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
eebdf7d7
DB
1318 !ARCH_OMAP) \
1319 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1320 || MACH_OMAP_PERSEUS2
1da177e4
LT
1321 depends on LEDS
1322 help
1323 If you say Y here, the red LED will be used to give a good real
1324 time indication of CPU usage, by lighting whenever the idle task
1325 is not currently executing.
1326
1327 The LART uses the same LED for both Timer LED and CPU usage LED
1328 functions. You may choose to use both, but the Timer LED function
1329 will overrule the CPU usage LED.
1330
1331config ALIGNMENT_TRAP
1332 bool
f12d0d7c 1333 depends on CPU_CP15_MMU
1da177e4 1334 default y if !ARCH_EBSA110
e119bfff 1335 select HAVE_PROC_CPU if PROC_FS
1da177e4 1336 help
84eb8d06 1337 ARM processors cannot fetch/store information which is not
1da177e4
LT
1338 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1339 address divisible by 4. On 32-bit ARM processors, these non-aligned
1340 fetch/store instructions will be emulated in software if you say
1341 here, which has a severe performance impact. This is necessary for
1342 correct operation of some network protocols. With an IP-only
1343 configuration it is safe to say N, otherwise say Y.
1344
39ec58f3
LB
1345config UACCESS_WITH_MEMCPY
1346 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1347 depends on MMU && EXPERIMENTAL
1348 default y if CPU_FEROCEON
1349 help
1350 Implement faster copy_to_user and clear_user methods for CPU
1351 cores where a 8-word STM instruction give significantly higher
1352 memory write throughput than a sequence of individual 32bit stores.
1353
1354 A possible side effect is a slight increase in scheduling latency
1355 between threads sharing the same address space if they invoke
1356 such copy operations with large buffers.
1357
1358 However, if the CPU data cache is using a write-allocate mode,
1359 this option is unlikely to provide any performance gain.
1360
1da177e4
LT
1361endmenu
1362
1363menu "Boot options"
1364
1365# Compressed boot loader in ROM. Yes, we really want to ask about
1366# TEXT and BSS so we preserve their values in the config files.
1367config ZBOOT_ROM_TEXT
1368 hex "Compressed ROM boot loader base address"
1369 default "0"
1370 help
1371 The physical address at which the ROM-able zImage is to be
1372 placed in the target. Platforms which normally make use of
1373 ROM-able zImage formats normally set this to a suitable
1374 value in their defconfig file.
1375
1376 If ZBOOT_ROM is not enabled, this has no effect.
1377
1378config ZBOOT_ROM_BSS
1379 hex "Compressed ROM boot loader BSS address"
1380 default "0"
1381 help
f8c440b2
DF
1382 The base address of an area of read/write memory in the target
1383 for the ROM-able zImage which must be available while the
1384 decompressor is running. It must be large enough to hold the
1385 entire decompressed kernel plus an additional 128 KiB.
1386 Platforms which normally make use of ROM-able zImage formats
1387 normally set this to a suitable value in their defconfig file.
1da177e4
LT
1388
1389 If ZBOOT_ROM is not enabled, this has no effect.
1390
1391config ZBOOT_ROM
1392 bool "Compressed boot loader in ROM/flash"
1393 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1394 help
1395 Say Y here if you intend to execute your compressed kernel image
1396 (zImage) directly from ROM or flash. If unsure, say N.
1397
1398config CMDLINE
1399 string "Default kernel command string"
1400 default ""
1401 help
1402 On some architectures (EBSA110 and CATS), there is currently no way
1403 for the boot loader to pass arguments to the kernel. For these
1404 architectures, you should supply some command-line options at build
1405 time by entering them here. As a minimum, you should specify the
1406 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1407
1408config XIP_KERNEL
1409 bool "Kernel Execute-In-Place from ROM"
1410 depends on !ZBOOT_ROM
1411 help
1412 Execute-In-Place allows the kernel to run from non-volatile storage
1413 directly addressable by the CPU, such as NOR flash. This saves RAM
1414 space since the text section of the kernel is not loaded from flash
1415 to RAM. Read-write sections, such as the data section and stack,
1416 are still copied to RAM. The XIP kernel is not compressed since
1417 it has to run directly from flash, so it will take more space to
1418 store it. The flash address used to link the kernel object files,
1419 and for storing it, is configuration dependent. Therefore, if you
1420 say Y here, you must know the proper physical address where to
1421 store the kernel image depending on your own flash memory usage.
1422
1423 Also note that the make target becomes "make xipImage" rather than
1424 "make zImage" or "make Image". The final kernel binary to put in
1425 ROM memory will be arch/arm/boot/xipImage.
1426
1427 If unsure, say N.
1428
1429config XIP_PHYS_ADDR
1430 hex "XIP Kernel Physical Location"
1431 depends on XIP_KERNEL
1432 default "0x00080000"
1433 help
1434 This is the physical address in your flash memory the kernel will
1435 be linked for and stored to. This address is dependent on your
1436 own flash usage.
1437
c587e4a6
RP
1438config KEXEC
1439 bool "Kexec system call (EXPERIMENTAL)"
1440 depends on EXPERIMENTAL
1441 help
1442 kexec is a system call that implements the ability to shutdown your
1443 current kernel, and to start another kernel. It is like a reboot
01dd2fbf 1444 but it is independent of the system firmware. And like a reboot
c587e4a6
RP
1445 you can start any kernel with it, not just Linux.
1446
1447 It is an ongoing process to be certain the hardware in a machine
1448 is properly shutdown, so do not be surprised if this code does not
1449 initially work for you. It may help to enable device hotplugging
1450 support.
1451
4cd9d6f7
RP
1452config ATAGS_PROC
1453 bool "Export atags in procfs"
b98d7291
UL
1454 depends on KEXEC
1455 default y
4cd9d6f7
RP
1456 help
1457 Should the atags used to boot the kernel be exported in an "atags"
1458 file in procfs. Useful with kexec.
1459
1da177e4
LT
1460endmenu
1461
ac9d7efc 1462menu "CPU Power Management"
1da177e4 1463
89c52ed4 1464if ARCH_HAS_CPUFREQ
1da177e4
LT
1465
1466source "drivers/cpufreq/Kconfig"
1467
1468config CPU_FREQ_SA1100
1469 bool
1da177e4
LT
1470
1471config CPU_FREQ_SA1110
1472 bool
1da177e4
LT
1473
1474config CPU_FREQ_INTEGRATOR
1475 tristate "CPUfreq driver for ARM Integrator CPUs"
1476 depends on ARCH_INTEGRATOR && CPU_FREQ
1477 default y
1478 help
1479 This enables the CPUfreq driver for ARM Integrator CPUs.
1480
1481 For details, take a look at <file:Documentation/cpu-freq>.
1482
1483 If in doubt, say Y.
1484
9e2697ff
RK
1485config CPU_FREQ_PXA
1486 bool
1487 depends on CPU_FREQ && ARCH_PXA && PXA25x
1488 default y
1489 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1490
b3748ddd
MB
1491config CPU_FREQ_S3C64XX
1492 bool "CPUfreq support for Samsung S3C64XX CPUs"
1493 depends on CPU_FREQ && CPU_S3C6410
1494
9d56c02a
BD
1495config CPU_FREQ_S3C
1496 bool
1497 help
1498 Internal configuration node for common cpufreq on Samsung SoC
1499
1500config CPU_FREQ_S3C24XX
1501 bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1502 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1503 select CPU_FREQ_S3C
1504 help
1505 This enables the CPUfreq driver for the Samsung S3C24XX family
1506 of CPUs.
1507
1508 For details, take a look at <file:Documentation/cpu-freq>.
1509
1510 If in doubt, say N.
1511
1512config CPU_FREQ_S3C24XX_PLL
1513 bool "Support CPUfreq changing of PLL frequency"
1514 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1515 help
1516 Compile in support for changing the PLL frequency from the
1517 S3C24XX series CPUfreq driver. The PLL takes time to settle
1518 after a frequency change, so by default it is not enabled.
1519
1520 This also means that the PLL tables for the selected CPU(s) will
1521 be built which may increase the size of the kernel image.
1522
1523config CPU_FREQ_S3C24XX_DEBUG
1524 bool "Debug CPUfreq Samsung driver core"
1525 depends on CPU_FREQ_S3C24XX
1526 help
1527 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1528
1529config CPU_FREQ_S3C24XX_IODEBUG
1530 bool "Debug CPUfreq Samsung driver IO timing"
1531 depends on CPU_FREQ_S3C24XX
1532 help
1533 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1534
e6d197a6
BD
1535config CPU_FREQ_S3C24XX_DEBUGFS
1536 bool "Export debugfs for CPUFreq"
1537 depends on CPU_FREQ_S3C24XX && DEBUG_FS
1538 help
1539 Export status information via debugfs.
1540
1da177e4
LT
1541endif
1542
ac9d7efc
RK
1543source "drivers/cpuidle/Kconfig"
1544
1545endmenu
1546
1da177e4
LT
1547menu "Floating point emulation"
1548
1549comment "At least one emulation must be selected"
1550
1551config FPE_NWFPE
1552 bool "NWFPE math emulation"
8993a44c 1553 depends on !AEABI || OABI_COMPAT
1da177e4
LT
1554 ---help---
1555 Say Y to include the NWFPE floating point emulator in the kernel.
1556 This is necessary to run most binaries. Linux does not currently
1557 support floating point hardware so you need to say Y here even if
1558 your machine has an FPA or floating point co-processor podule.
1559
1560 You may say N here if you are going to load the Acorn FPEmulator
1561 early in the bootup.
1562
1563config FPE_NWFPE_XP
1564 bool "Support extended precision"
bedf142b 1565 depends on FPE_NWFPE
1da177e4
LT
1566 help
1567 Say Y to include 80-bit support in the kernel floating-point
1568 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1569 Note that gcc does not generate 80-bit operations by default,
1570 so in most cases this option only enlarges the size of the
1571 floating point emulator without any good reason.
1572
1573 You almost surely want to say N here.
1574
1575config FPE_FASTFPE
1576 bool "FastFPE math emulation (EXPERIMENTAL)"
8993a44c 1577 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1da177e4
LT
1578 ---help---
1579 Say Y here to include the FAST floating point emulator in the kernel.
1580 This is an experimental much faster emulator which now also has full
1581 precision for the mantissa. It does not support any exceptions.
1582 It is very simple, and approximately 3-6 times faster than NWFPE.
1583
1584 It should be sufficient for most programs. It may be not suitable
1585 for scientific calculations, but you have to check this for yourself.
1586 If you do not feel you need a faster FP emulation you should better
1587 choose NWFPE.
1588
1589config VFP
1590 bool "VFP-format floating point maths"
c00d4ffd 1591 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1da177e4
LT
1592 help
1593 Say Y to include VFP support code in the kernel. This is needed
1594 if your hardware includes a VFP unit.
1595
1596 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1597 release notes and additional status information.
1598
1599 Say N if your target does not have VFP hardware.
1600
25ebee02
CM
1601config VFPv3
1602 bool
1603 depends on VFP
1604 default y if CPU_V7
1605
b5872db4
CM
1606config NEON
1607 bool "Advanced SIMD (NEON) Extension support"
1608 depends on VFPv3 && CPU_V7
1609 help
1610 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1611 Extension.
1612
1da177e4
LT
1613endmenu
1614
1615menu "Userspace binary formats"
1616
1617source "fs/Kconfig.binfmt"
1618
1619config ARTHUR
1620 tristate "RISC OS personality"
704bdda0 1621 depends on !AEABI
1da177e4
LT
1622 help
1623 Say Y here to include the kernel code necessary if you want to run
1624 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1625 experimental; if this sounds frightening, say N and sleep in peace.
1626 You can also say M here to compile this support as a module (which
1627 will be called arthur).
1628
1629endmenu
1630
1631menu "Power management options"
1632
eceab4ac 1633source "kernel/power/Kconfig"
1da177e4 1634
f4cb5700
JB
1635config ARCH_SUSPEND_POSSIBLE
1636 def_bool y
1637
1da177e4
LT
1638endmenu
1639
d5950b43
SR
1640source "net/Kconfig"
1641
ac25150f 1642source "drivers/Kconfig"
1da177e4
LT
1643
1644source "fs/Kconfig"
1645
1da177e4
LT
1646source "arch/arm/Kconfig.debug"
1647
1648source "security/Kconfig"
1649
1650source "crypto/Kconfig"
1651
1652source "lib/Kconfig"
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