[ARM] 4373/1: i.MX/MX1 GPIO support implementation
[GitHub/mt8127/android_kernel_alcatel_ttab.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
12b824fb 11 select RTC_LIB
75e7153a 12 select SYS_SUPPORTS_APM_EMULATION
1da177e4
LT
13 help
14 The ARM series is a line of low-power-consumption RISC chip designs
f6c8965a 15 licensed by ARM Ltd and targeted at embedded applications and
1da177e4 16 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
f6c8965a 17 manufactured, but legacy ARM-based PC hardware remains popular in
1da177e4
LT
18 Europe. There is an ARM Linux project with a web page at
19 <http://www.arm.linux.org.uk/>.
20
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RB
21config SYS_SUPPORTS_APM_EMULATION
22 bool
23
0a938b97
DB
24config GENERIC_GPIO
25 bool
26 default n
27
746140c7
KH
28config GENERIC_TIME
29 bool
30 default n
31
0567a0c0
KH
32config GENERIC_CLOCKEVENTS
33 bool
34 default n
35
1da177e4
LT
36config MMU
37 bool
38 default y
39
5ea81769
AV
40config NO_IOPORT
41 bool
42 default n
43
1da177e4
LT
44config EISA
45 bool
46 ---help---
47 The Extended Industry Standard Architecture (EISA) bus was
48 developed as an open alternative to the IBM MicroChannel bus.
49
50 The EISA bus provided some of the features of the IBM MicroChannel
51 bus while maintaining backward compatibility with cards made for
52 the older ISA bus. The EISA bus saw limited use between 1988 and
53 1995 when it was made obsolete by the PCI bus.
54
55 Say Y here if you are building a kernel for an EISA-based machine.
56
57 Otherwise, say N.
58
59config SBUS
60 bool
61
62config MCA
63 bool
64 help
65 MicroChannel Architecture is found in some IBM PS/2 machines and
66 laptops. It is a bus system similar to PCI or ISA. See
67 <file:Documentation/mca.txt> (and especially the web page given
68 there) before attempting to build an MCA bus kernel.
69
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TG
70config GENERIC_HARDIRQS
71 bool
72 default y
73
f16fb1ec
RK
74config STACKTRACE_SUPPORT
75 bool
76 default y
77
78config LOCKDEP_SUPPORT
79 bool
80 default y
81
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RK
82config TRACE_IRQFLAGS_SUPPORT
83 bool
84 default y
85
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TG
86config HARDIRQS_SW_RESEND
87 bool
88 default y
89
90config GENERIC_IRQ_PROBE
91 bool
92 default y
93
1da177e4
LT
94config RWSEM_GENERIC_SPINLOCK
95 bool
96 default y
97
98config RWSEM_XCHGADD_ALGORITHM
99 bool
100
f0d1b0b3
DH
101config ARCH_HAS_ILOG2_U32
102 bool
103 default n
104
105config ARCH_HAS_ILOG2_U64
106 bool
107 default n
108
b89c3b16
AM
109config GENERIC_HWEIGHT
110 bool
111 default y
112
1da177e4
LT
113config GENERIC_CALIBRATE_DELAY
114 bool
115 default y
116
a08b6b79
AV
117config ARCH_MAY_HAVE_PC_FDC
118 bool
119
5ac6da66
CL
120config ZONE_DMA
121 bool
122 default y
123
1da177e4
LT
124config GENERIC_ISA_DMA
125 bool
126
1da177e4
LT
127config FIQ
128 bool
129
034d2f5a
AV
130config ARCH_MTD_XIP
131 bool
132
c760fc19
HC
133config VECTORS_BASE
134 hex
6afd6fae 135 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
c760fc19
HC
136 default DRAM_BASE if REMAP_VECTORS_TO_RAM
137 default 0x00000000
138 help
139 The base address of exception vectors.
140
1da177e4
LT
141source "init/Kconfig"
142
143menu "System Type"
144
145choice
146 prompt "ARM system type"
6a0e2430 147 default ARCH_VERSATILE
1da177e4 148
4af6fee1
DS
149config ARCH_AAEC2000
150 bool "Agilent AAEC-2000 based"
151 select ARM_AMBA
152 help
153 This enables support for systems based on the Agilent AAEC-2000
154
155config ARCH_INTEGRATOR
156 bool "ARM Ltd. Integrator family"
157 select ARM_AMBA
158 select ICST525
159 help
160 Support for ARM's Integrator platform.
161
162config ARCH_REALVIEW
163 bool "ARM Ltd. RealView family"
164 select ARM_AMBA
165 select ICST307
166 help
167 This enables support for ARM Ltd RealView boards.
168
169config ARCH_VERSATILE
170 bool "ARM Ltd. Versatile family"
171 select ARM_AMBA
172 select ARM_VIC
173 select ICST307
b49c87c2 174 select GENERIC_TIME
89df1272 175 select GENERIC_CLOCKEVENTS
4af6fee1
DS
176 help
177 This enables support for ARM Ltd Versatile board.
178
8fc5ffa0
AV
179config ARCH_AT91
180 bool "Atmel AT91"
0a938b97 181 select GENERIC_GPIO
4af6fee1 182 help
8fc5ffa0
AV
183 This enables support for systems based on the Atmel AT91RM9200
184 and AT91SAM9xxx processors.
4af6fee1 185
1da177e4 186config ARCH_CLPS7500
4af6fee1 187 bool "Cirrus CL-PS7500FE"
1da177e4 188 select TIMER_ACORN
f7e68bbf 189 select ISA
e4169889 190 select NO_IOPORT
f999b8bd
MM
191 help
192 Support for the Cirrus Logic PS7500FE system-on-a-chip.
1da177e4
LT
193
194config ARCH_CLPS711X
4af6fee1 195 bool "Cirrus Logic CLPS711x/EP721x-based"
f999b8bd
MM
196 help
197 Support for Cirrus Logic 711x/721x based boards.
1da177e4
LT
198
199config ARCH_CO285
200 bool "Co-EBSA285"
201 select FOOTBRIDGE
202 select FOOTBRIDGE_ADDIN
f999b8bd
MM
203 help
204 Support for Intel's EBSA285 companion chip.
1da177e4
LT
205
206config ARCH_EBSA110
207 bool "EBSA-110"
f7e68bbf 208 select ISA
c5eb2a2b 209 select NO_IOPORT
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210 help
211 This is an evaluation board for the StrongARM processor available
f6c8965a 212 from Digital. It has limited hardware on-board, including an
1da177e4
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213 Ethernet interface, two PCMCIA sockets, two serial ports and a
214 parallel port.
215
e7736d47
LB
216config ARCH_EP93XX
217 bool "EP93xx-based"
218 select ARM_AMBA
219 select ARM_VIC
220 help
221 This enables support for the Cirrus EP93xx series of CPUs.
222
1da177e4
LT
223config ARCH_FOOTBRIDGE
224 bool "FootBridge"
225 select FOOTBRIDGE
f999b8bd
MM
226 help
227 Support for systems based on the DC21285 companion chip
228 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
1da177e4 229
4af6fee1
DS
230config ARCH_NETX
231 bool "Hilscher NetX based"
232 select ARM_VIC
f999b8bd 233 help
4af6fee1
DS
234 This enables support for systems based on the Hilscher NetX Soc
235
236config ARCH_H720X
237 bool "Hynix HMS720x-based"
238 select ISA_DMA_API
239 help
240 This enables support for systems based on the Hynix HMS720x
241
242config ARCH_IMX
243 bool "IMX"
b3e6a508 244 select GENERIC_GPIO
4af6fee1
DS
245 help
246 Support for Motorola's i.MX family of processors (MX1, MXL).
1da177e4 247
3b938be6
RK
248config ARCH_IOP13XX
249 bool "IOP13xx-based"
250 depends on MMU
251 select PLAT_IOP
252 select PCI
253 select ARCH_SUPPORTS_MSI
254 help
255 Support for Intel's IOP13XX (XScale) family of processors.
256
3f7e5815
LB
257config ARCH_IOP32X
258 bool "IOP32x-based"
a4f7e763 259 depends on MMU
7ae1f7ec 260 select PLAT_IOP
f7e68bbf 261 select PCI
f999b8bd 262 help
3f7e5815
LB
263 Support for Intel's 80219 and IOP32X (XScale) family of
264 processors.
265
266config ARCH_IOP33X
267 bool "IOP33x-based"
268 depends on MMU
7ae1f7ec 269 select PLAT_IOP
3f7e5815
LB
270 select PCI
271 help
272 Support for Intel's IOP33X (XScale) family of processors.
1da177e4 273
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RK
274config ARCH_IXP23XX
275 bool "IXP23XX-based"
a4f7e763 276 depends on MMU
3b938be6 277 select PCI
f999b8bd 278 help
3b938be6 279 Support for Intel's IXP23xx (XScale) family of processors.
1da177e4
LT
280
281config ARCH_IXP2000
282 bool "IXP2400/2800-based"
a4f7e763 283 depends on MMU
f7e68bbf 284 select PCI
f999b8bd
MM
285 help
286 Support for Intel's IXP2400/2800 (XScale) family of processors.
1da177e4 287
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RK
288config ARCH_IXP4XX
289 bool "IXP4xx-based"
a4f7e763 290 depends on MMU
8858e9af 291 select GENERIC_GPIO
3b938be6
RK
292 select GENERIC_TIME
293 select GENERIC_CLOCKEVENTS
c4713074 294 help
3b938be6 295 Support for Intel's IXP4XX (XScale) family of processors.
c4713074 296
1da177e4
LT
297config ARCH_L7200
298 bool "LinkUp-L7200"
299 select FIQ
300 help
301 Say Y here if you intend to run this kernel on a LinkUp Systems
302 L7200 Software Development Board which uses an ARM720T processor.
303 Information on this board can be obtained at:
304
305 <http://www.linkupsys.com/>
306
307 If you have any questions or comments about the Linux kernel port
308 to this board, send e-mail to <sjhill@cotw.com>.
309
c53c9cf6
AV
310config ARCH_KS8695
311 bool "Micrel/Kendin KS8695"
312 help
313 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
314 System-on-Chip devices.
315
9918cda5
UKK
316config ARCH_NS9XXX
317 bool "NetSilicon NS9xxx"
318 help
319 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
320 System.
321
322 <http://www.digi.com/products/microprocessors/index.jsp>
323
4af6fee1
DS
324config ARCH_PNX4008
325 bool "Philips Nexperia PNX4008 Mobile"
326 help
327 This enables support for Philips PNX4008 mobile platform.
328
1da177e4
LT
329config ARCH_PXA
330 bool "PXA2xx-based"
a4f7e763 331 depends on MMU
034d2f5a 332 select ARCH_MTD_XIP
0a938b97 333 select GENERIC_GPIO
45cf5eef 334 select GENERIC_TIME
f999b8bd
MM
335 help
336 Support for Intel's PXA2XX processor line.
1da177e4
LT
337
338config ARCH_RPC
339 bool "RiscPC"
340 select ARCH_ACORN
341 select FIQ
342 select TIMER_ACORN
a08b6b79 343 select ARCH_MAY_HAVE_PC_FDC
065909b9 344 select ISA_DMA_API
5ea81769 345 select NO_IOPORT
1da177e4
LT
346 help
347 On the Acorn Risc-PC, Linux can support the internal IDE disk and
348 CD-ROM interface, serial and parallel port, and the floppy drive.
349
350config ARCH_SA1100
351 bool "SA1100-based"
f7e68bbf 352 select ISA
3cd9e19e 353 select ARCH_DISCONTIGMEM_ENABLE
034d2f5a 354 select ARCH_MTD_XIP
0a938b97 355 select GENERIC_GPIO
f999b8bd
MM
356 help
357 Support for StrongARM 11x0 based boards.
1da177e4
LT
358
359config ARCH_S3C2410
e4d06e39 360 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
0a938b97 361 select GENERIC_GPIO
1da177e4
LT
362 help
363 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
364 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
f6c8965a 365 the Samsung SMDK2410 development board (and derivatives).
1da177e4
LT
366
367config ARCH_SHARK
368 bool "Shark"
f7e68bbf
RK
369 select ISA
370 select ISA_DMA
371 select PCI
f999b8bd
MM
372 help
373 Support for the StrongARM based Digital DNARD machine, also known
374 as "Shark" (<http://www.shark-linux.de/shark.html>).
1da177e4
LT
375
376config ARCH_LH7A40X
377 bool "Sharp LH7A40X"
378 help
379 Say Y here for systems based on one of the Sharp LH7A40X
380 System on a Chip processors. These CPUs include an ARM922T
381 core with a wide array of integrated devices for
382 hand-held and low-power applications.
383
7c6337e2
KH
384config ARCH_DAVINCI
385 bool "TI DaVinci"
386 select GENERIC_TIME
387 select GENERIC_CLOCKEVENTS
388 help
389 Support for TI's DaVinci platform.
390
3b938be6
RK
391config ARCH_OMAP
392 bool "TI OMAP"
393 select GENERIC_GPIO
394 select GENERIC_TIME
395 help
396 Support for TI's OMAP platform (OMAP1 and OMAP2).
397
1da177e4
LT
398endchoice
399
400source "arch/arm/mach-clps711x/Kconfig"
401
e7736d47
LB
402source "arch/arm/mach-ep93xx/Kconfig"
403
1da177e4
LT
404source "arch/arm/mach-footbridge/Kconfig"
405
406source "arch/arm/mach-integrator/Kconfig"
407
3f7e5815
LB
408source "arch/arm/mach-iop32x/Kconfig"
409
410source "arch/arm/mach-iop33x/Kconfig"
1da177e4 411
285f5fa7
DW
412source "arch/arm/mach-iop13xx/Kconfig"
413
1da177e4
LT
414source "arch/arm/mach-ixp4xx/Kconfig"
415
416source "arch/arm/mach-ixp2000/Kconfig"
417
c4713074
LB
418source "arch/arm/mach-ixp23xx/Kconfig"
419
1da177e4
LT
420source "arch/arm/mach-pxa/Kconfig"
421
422source "arch/arm/mach-sa1100/Kconfig"
423
d48af15e
TL
424source "arch/arm/plat-omap/Kconfig"
425
426source "arch/arm/mach-omap1/Kconfig"
1da177e4 427
1dbae815
TL
428source "arch/arm/mach-omap2/Kconfig"
429
a21765a7
BD
430source "arch/arm/plat-s3c24xx/Kconfig"
431
432if ARCH_S3C2410
433source "arch/arm/mach-s3c2400/Kconfig"
1da177e4 434source "arch/arm/mach-s3c2410/Kconfig"
a21765a7
BD
435source "arch/arm/mach-s3c2412/Kconfig"
436source "arch/arm/mach-s3c2440/Kconfig"
437source "arch/arm/mach-s3c2442/Kconfig"
e4d06e39 438source "arch/arm/mach-s3c2443/Kconfig"
a21765a7 439endif
1da177e4
LT
440
441source "arch/arm/mach-lh7a40x/Kconfig"
442
443source "arch/arm/mach-imx/Kconfig"
444
445source "arch/arm/mach-h720x/Kconfig"
446
447source "arch/arm/mach-versatile/Kconfig"
448
038c5b60
BN
449source "arch/arm/mach-aaec2000/Kconfig"
450
8ad68bbf
CM
451source "arch/arm/mach-realview/Kconfig"
452
9d041268 453source "arch/arm/mach-at91/Kconfig"
73a59c1c 454
bb6d8c88
SH
455source "arch/arm/mach-netx/Kconfig"
456
9918cda5
UKK
457source "arch/arm/mach-ns9xxx/Kconfig"
458
7c6337e2
KH
459source "arch/arm/mach-davinci/Kconfig"
460
c53c9cf6
AV
461source "arch/arm/mach-ks8695/Kconfig"
462
1da177e4
LT
463# Definitions to make life easier
464config ARCH_ACORN
465 bool
466
7ae1f7ec
LB
467config PLAT_IOP
468 bool
469
1da177e4
LT
470source arch/arm/mm/Kconfig
471
afe4b25e
LB
472config IWMMXT
473 bool "Enable iWMMXt support"
6340aa61 474 depends on CPU_XSCALE || CPU_XSC3
afe4b25e
LB
475 default y if PXA27x
476 help
477 Enable support for iWMMXt context switching at run time if
478 running on a CPU that supports it.
479
1da177e4
LT
480# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
481config XSCALE_PMU
482 bool
483 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
484 default y
485
3b93e7b0
HC
486if !MMU
487source "arch/arm/Kconfig-nommu"
488endif
489
1da177e4
LT
490endmenu
491
492source "arch/arm/common/Kconfig"
493
494config FORCE_MAX_ZONEORDER
495 int
496 depends on SA1111
497 default "9"
498
499menu "Bus support"
500
501config ARM_AMBA
502 bool
503
504config ISA
505 bool
1da177e4
LT
506 help
507 Find out whether you have ISA slots on your motherboard. ISA is the
508 name of a bus system, i.e. the way the CPU talks to the other stuff
509 inside your box. Other bus systems are PCI, EISA, MicroChannel
510 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
511 newer boards don't support it. If you have ISA, say Y, otherwise N.
512
065909b9 513# Select ISA DMA controller support
1da177e4
LT
514config ISA_DMA
515 bool
065909b9 516 select ISA_DMA_API
1da177e4 517
065909b9 518# Select ISA DMA interface
5cae841b
AV
519config ISA_DMA_API
520 bool
5cae841b 521
1da177e4 522config PCI
c53c9cf6 523 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695
1da177e4
LT
524 help
525 Find out whether you have a PCI motherboard. PCI is the name of a
526 bus system, i.e. the way the CPU talks to the other stuff inside
527 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
528 VESA. If you have PCI, say Y, otherwise N.
529
530 The PCI-HOWTO, available from
531 <http://www.tldp.org/docs.html#howto>, contains valuable
532 information about which PCI hardware does work under Linux and which
533 doesn't.
534
535# Select the host bridge type
536config PCI_HOST_VIA82C505
537 bool
538 depends on PCI && ARCH_SHARK
539 default y
540
541source "drivers/pci/Kconfig"
542
543source "drivers/pcmcia/Kconfig"
544
545endmenu
546
547menu "Kernel Features"
548
0567a0c0
KH
549source "kernel/time/Kconfig"
550
1da177e4
LT
551config SMP
552 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
f6db449c 553 depends on EXPERIMENTAL && REALVIEW_MPCORE
1da177e4
LT
554 help
555 This enables support for systems with more than one CPU. If you have
556 a system with only one CPU, like most personal computers, say N. If
557 you have a system with more than one CPU, say Y.
558
559 If you say N here, the kernel will run on single and multiprocessor
560 machines, but will use only one CPU of a multiprocessor machine. If
561 you say Y here, the kernel will run on many, but not all, single
562 processor machines. On a single processor machine, the kernel will
563 run faster if you say N here.
564
12c62c2e
AO
565 See also the <file:Documentation/smp.txt>,
566 <file:Documentation/i386/IO-APIC.txt>,
1da177e4
LT
567 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
568 <http://www.linuxdoc.org/docs.html#howto>.
569
570 If you don't know what to do here, say N.
571
572config NR_CPUS
573 int "Maximum number of CPUs (2-32)"
574 range 2 32
575 depends on SMP
576 default "4"
577
a054a811
RK
578config HOTPLUG_CPU
579 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
580 depends on SMP && HOTPLUG && EXPERIMENTAL
581 help
582 Say Y here to experiment with turning CPUs off and on. CPUs
583 can be controlled through /sys/devices/system/cpu.
584
37ee16ae
RK
585config LOCAL_TIMERS
586 bool "Use local timer interrupts"
2a98beb6 587 depends on SMP && REALVIEW_MPCORE
37ee16ae
RK
588 default y
589 help
590 Enable support for local timers on SMP platforms, rather then the
591 legacy IPI broadcast method. Local timers allows the system
592 accounting to be spread across the timer interval, preventing a
593 "thundering herd" at every timer tick.
594
1da177e4
LT
595config PREEMPT
596 bool "Preemptible Kernel (EXPERIMENTAL)"
597 depends on EXPERIMENTAL
598 help
599 This option reduces the latency of the kernel when reacting to
600 real-time or interactive events by allowing a low priority process to
601 be preempted even if it is in kernel mode executing a system call.
602 This allows applications to run more reliably even when the system is
603 under load.
604
605 Say Y here if you are building a kernel for a desktop, embedded
606 or real-time system. Say N if you are unsure.
607
8749af68
RK
608config NO_IDLE_HZ
609 bool "Dynamic tick timer"
0567a0c0 610 depends on !GENERIC_CLOCKEVENTS
8749af68
RK
611 help
612 Select this option if you want to disable continuous timer ticks
613 and have them programmed to occur as required. This option saves
614 power as the system can remain in idle state for longer.
615
616 By default dynamic tick is disabled during the boot, and can be
617 manually enabled with:
618
619 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
620
621 Alternatively, if you want dynamic tick automatically enabled
622 during boot, pass "dyntick=enable" via the kernel command string.
623
f2be64b3
TL
624 Please note that dynamic tick may affect the accuracy of
625 timekeeping on some platforms depending on the implementation.
569d2c34
NP
626 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
627 to have accurate timekeeping with dynamic tick.
f2be64b3 628
f8065813
RK
629config HZ
630 int
631 default 128 if ARCH_L7200
632 default 200 if ARCH_EBSA110 || ARCH_S3C2410
bfe65704 633 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
f8065813
RK
634 default 100
635
704bdda0
NP
636config AEABI
637 bool "Use the ARM EABI to compile the kernel"
638 help
639 This option allows for the kernel to be compiled using the latest
640 ARM ABI (aka EABI). This is only useful if you are using a user
641 space environment that is also compiled with EABI.
642
643 Since there are major incompatibilities between the legacy ABI and
644 EABI, especially with regard to structure member alignment, this
645 option also changes the kernel syscall calling convention to
646 disambiguate both ABIs and allow for backward compatibility support
647 (selected with CONFIG_OABI_COMPAT).
648
649 To use this you need GCC version 4.0.0 or later.
650
6c90c872 651config OABI_COMPAT
a73a3ff1 652 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
61c484d4 653 depends on AEABI && EXPERIMENTAL
6c90c872
NP
654 default y
655 help
656 This option preserves the old syscall interface along with the
657 new (ARM EABI) one. It also provides a compatibility layer to
658 intercept syscalls that have structure arguments which layout
659 in memory differs between the legacy ABI and the new ARM EABI
660 (only for non "thumb" binaries). This option adds a tiny
661 overhead to all syscalls and produces a slightly larger kernel.
662 If you know you'll be using only pure EABI user space then you
663 can say N here. If this option is not selected and you attempt
664 to execute a legacy ABI binary then the result will be
665 UNPREDICTABLE (in fact it can be predicted that it won't work
666 at all). If in doubt say Y.
667
3f22ab27 668config ARCH_DISCONTIGMEM_ENABLE
1da177e4 669 bool
f7e68bbf 670 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
1da177e4
LT
671 help
672 Say Y to support efficient handling of discontiguous physical memory,
673 for architectures which are either NUMA (Non-Uniform Memory Access)
674 or have huge holes in the physical address space for other reasons.
675 See <file:Documentation/vm/numa> for more.
676
c80d79d7
YG
677config NODES_SHIFT
678 int
679 default "4" if ARCH_LH7A40X
680 default "2"
681 depends on NEED_MULTIPLE_NODES
682
3f22ab27
DH
683source "mm/Kconfig"
684
1da177e4
LT
685config LEDS
686 bool "Timer and CPU usage LEDs"
687 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
688 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
689 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
690 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
73a59c1c 691 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
c53c9cf6
AV
692 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
693 ARCH_KS8695
1da177e4
LT
694 help
695 If you say Y here, the LEDs on your machine will be used
696 to provide useful information about your current system status.
697
698 If you are compiling a kernel for a NetWinder or EBSA-285, you will
699 be able to select which LEDs are active using the options below. If
700 you are compiling a kernel for the EBSA-110 or the LART however, the
701 red LED will simply flash regularly to indicate that the system is
702 still functional. It is safe to say Y here if you have a CATS
703 system, but the driver will do nothing.
704
705config LEDS_TIMER
706 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
707 MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
708 depends on LEDS
0567a0c0 709 depends on !GENERIC_CLOCKEVENTS
1da177e4
LT
710 default y if ARCH_EBSA110
711 help
712 If you say Y here, one of the system LEDs (the green one on the
713 NetWinder, the amber one on the EBSA285, or the red one on the LART)
714 will flash regularly to indicate that the system is still
715 operational. This is mainly useful to kernel hackers who are
716 debugging unstable kernels.
717
718 The LART uses the same LED for both Timer LED and CPU usage LED
719 functions. You may choose to use both, but the Timer LED function
720 will overrule the CPU usage LED.
721
722config LEDS_CPU
723 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
724 !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
725 depends on LEDS
726 help
727 If you say Y here, the red LED will be used to give a good real
728 time indication of CPU usage, by lighting whenever the idle task
729 is not currently executing.
730
731 The LART uses the same LED for both Timer LED and CPU usage LED
732 functions. You may choose to use both, but the Timer LED function
733 will overrule the CPU usage LED.
734
735config ALIGNMENT_TRAP
736 bool
f12d0d7c 737 depends on CPU_CP15_MMU
1da177e4
LT
738 default y if !ARCH_EBSA110
739 help
84eb8d06 740 ARM processors cannot fetch/store information which is not
1da177e4
LT
741 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
742 address divisible by 4. On 32-bit ARM processors, these non-aligned
743 fetch/store instructions will be emulated in software if you say
744 here, which has a severe performance impact. This is necessary for
745 correct operation of some network protocols. With an IP-only
746 configuration it is safe to say N, otherwise say Y.
747
748endmenu
749
750menu "Boot options"
751
752# Compressed boot loader in ROM. Yes, we really want to ask about
753# TEXT and BSS so we preserve their values in the config files.
754config ZBOOT_ROM_TEXT
755 hex "Compressed ROM boot loader base address"
756 default "0"
757 help
758 The physical address at which the ROM-able zImage is to be
759 placed in the target. Platforms which normally make use of
760 ROM-able zImage formats normally set this to a suitable
761 value in their defconfig file.
762
763 If ZBOOT_ROM is not enabled, this has no effect.
764
765config ZBOOT_ROM_BSS
766 hex "Compressed ROM boot loader BSS address"
767 default "0"
768 help
f8c440b2
DF
769 The base address of an area of read/write memory in the target
770 for the ROM-able zImage which must be available while the
771 decompressor is running. It must be large enough to hold the
772 entire decompressed kernel plus an additional 128 KiB.
773 Platforms which normally make use of ROM-able zImage formats
774 normally set this to a suitable value in their defconfig file.
1da177e4
LT
775
776 If ZBOOT_ROM is not enabled, this has no effect.
777
778config ZBOOT_ROM
779 bool "Compressed boot loader in ROM/flash"
780 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
781 help
782 Say Y here if you intend to execute your compressed kernel image
783 (zImage) directly from ROM or flash. If unsure, say N.
784
785config CMDLINE
786 string "Default kernel command string"
787 default ""
788 help
789 On some architectures (EBSA110 and CATS), there is currently no way
790 for the boot loader to pass arguments to the kernel. For these
791 architectures, you should supply some command-line options at build
792 time by entering them here. As a minimum, you should specify the
793 memory size and the root device (e.g., mem=64M root=/dev/nfs).
794
795config XIP_KERNEL
796 bool "Kernel Execute-In-Place from ROM"
797 depends on !ZBOOT_ROM
798 help
799 Execute-In-Place allows the kernel to run from non-volatile storage
800 directly addressable by the CPU, such as NOR flash. This saves RAM
801 space since the text section of the kernel is not loaded from flash
802 to RAM. Read-write sections, such as the data section and stack,
803 are still copied to RAM. The XIP kernel is not compressed since
804 it has to run directly from flash, so it will take more space to
805 store it. The flash address used to link the kernel object files,
806 and for storing it, is configuration dependent. Therefore, if you
807 say Y here, you must know the proper physical address where to
808 store the kernel image depending on your own flash memory usage.
809
810 Also note that the make target becomes "make xipImage" rather than
811 "make zImage" or "make Image". The final kernel binary to put in
812 ROM memory will be arch/arm/boot/xipImage.
813
814 If unsure, say N.
815
816config XIP_PHYS_ADDR
817 hex "XIP Kernel Physical Location"
818 depends on XIP_KERNEL
819 default "0x00080000"
820 help
821 This is the physical address in your flash memory the kernel will
822 be linked for and stored to. This address is dependent on your
823 own flash usage.
824
c587e4a6
RP
825config KEXEC
826 bool "Kexec system call (EXPERIMENTAL)"
827 depends on EXPERIMENTAL
828 help
829 kexec is a system call that implements the ability to shutdown your
830 current kernel, and to start another kernel. It is like a reboot
831 but it is indepedent of the system firmware. And like a reboot
832 you can start any kernel with it, not just Linux.
833
834 It is an ongoing process to be certain the hardware in a machine
835 is properly shutdown, so do not be surprised if this code does not
836 initially work for you. It may help to enable device hotplugging
837 support.
838
1da177e4
LT
839endmenu
840
3c8cd0cc 841if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX )
1da177e4
LT
842
843menu "CPU Frequency scaling"
844
845source "drivers/cpufreq/Kconfig"
846
847config CPU_FREQ_SA1100
848 bool
07c6d48f 849 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1da177e4
LT
850 default y
851
852config CPU_FREQ_SA1110
853 bool
854 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
855 default y
856
857config CPU_FREQ_INTEGRATOR
858 tristate "CPUfreq driver for ARM Integrator CPUs"
859 depends on ARCH_INTEGRATOR && CPU_FREQ
860 default y
861 help
862 This enables the CPUfreq driver for ARM Integrator CPUs.
863
864 For details, take a look at <file:Documentation/cpu-freq>.
865
866 If in doubt, say Y.
867
3c8cd0cc
PP
868config CPU_FREQ_IMX
869 tristate "CPUfreq driver for i.MX CPUs"
870 depends on ARCH_IMX && CPU_FREQ
871 default n
872 help
873 This enables the CPUfreq driver for i.MX CPUs.
874
875 If in doubt, say N.
876
1da177e4
LT
877endmenu
878
879endif
880
881menu "Floating point emulation"
882
883comment "At least one emulation must be selected"
884
885config FPE_NWFPE
886 bool "NWFPE math emulation"
8993a44c 887 depends on !AEABI || OABI_COMPAT
1da177e4
LT
888 ---help---
889 Say Y to include the NWFPE floating point emulator in the kernel.
890 This is necessary to run most binaries. Linux does not currently
891 support floating point hardware so you need to say Y here even if
892 your machine has an FPA or floating point co-processor podule.
893
894 You may say N here if you are going to load the Acorn FPEmulator
895 early in the bootup.
896
897config FPE_NWFPE_XP
898 bool "Support extended precision"
bedf142b 899 depends on FPE_NWFPE
1da177e4
LT
900 help
901 Say Y to include 80-bit support in the kernel floating-point
902 emulator. Otherwise, only 32 and 64-bit support is compiled in.
903 Note that gcc does not generate 80-bit operations by default,
904 so in most cases this option only enlarges the size of the
905 floating point emulator without any good reason.
906
907 You almost surely want to say N here.
908
909config FPE_FASTFPE
910 bool "FastFPE math emulation (EXPERIMENTAL)"
8993a44c 911 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1da177e4
LT
912 ---help---
913 Say Y here to include the FAST floating point emulator in the kernel.
914 This is an experimental much faster emulator which now also has full
915 precision for the mantissa. It does not support any exceptions.
916 It is very simple, and approximately 3-6 times faster than NWFPE.
917
918 It should be sufficient for most programs. It may be not suitable
919 for scientific calculations, but you have to check this for yourself.
920 If you do not feel you need a faster FP emulation you should better
921 choose NWFPE.
922
923config VFP
924 bool "VFP-format floating point maths"
925 depends on CPU_V6 || CPU_ARM926T
926 help
927 Say Y to include VFP support code in the kernel. This is needed
928 if your hardware includes a VFP unit.
929
930 Please see <file:Documentation/arm/VFP/release-notes.txt> for
931 release notes and additional status information.
932
933 Say N if your target does not have VFP hardware.
934
935endmenu
936
937menu "Userspace binary formats"
938
939source "fs/Kconfig.binfmt"
940
941config ARTHUR
942 tristate "RISC OS personality"
704bdda0 943 depends on !AEABI
1da177e4
LT
944 help
945 Say Y here to include the kernel code necessary if you want to run
946 Acorn RISC OS/Arthur binaries under Linux. This code is still very
947 experimental; if this sounds frightening, say N and sleep in peace.
948 You can also say M here to compile this support as a module (which
949 will be called arthur).
950
951endmenu
952
953menu "Power management options"
954
eceab4ac 955source "kernel/power/Kconfig"
1da177e4 956
1da177e4
LT
957endmenu
958
d5950b43
SR
959source "net/Kconfig"
960
1da177e4
LT
961menu "Device Drivers"
962
963source "drivers/base/Kconfig"
964
c35bf4a5
PM
965source "drivers/connector/Kconfig"
966
f12d0d7c 967if ALIGNMENT_TRAP || !CPU_CP15_MMU
1da177e4
LT
968source "drivers/mtd/Kconfig"
969endif
970
971source "drivers/parport/Kconfig"
972
973source "drivers/pnp/Kconfig"
974
975source "drivers/block/Kconfig"
976
977source "drivers/acorn/block/Kconfig"
978
3f7e5815 979if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
bb011b8e 980 || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
c4713074
LB
981 || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
982 || ARCH_IXP23XX
1da177e4
LT
983source "drivers/ide/Kconfig"
984endif
985
986source "drivers/scsi/Kconfig"
987
eb370f0b
MM
988source "drivers/ata/Kconfig"
989
1da177e4
LT
990source "drivers/md/Kconfig"
991
992source "drivers/message/fusion/Kconfig"
993
994source "drivers/ieee1394/Kconfig"
995
996source "drivers/message/i2o/Kconfig"
997
d5950b43 998source "drivers/net/Kconfig"
1da177e4
LT
999
1000source "drivers/isdn/Kconfig"
1001
1002# input before char - char/joystick depends on it. As does USB.
1003
1004source "drivers/input/Kconfig"
1005
1006source "drivers/char/Kconfig"
1007
1008source "drivers/i2c/Kconfig"
1009
8ae12a0d
DB
1010source "drivers/spi/Kconfig"
1011
04916c0e
AZ
1012source "drivers/w1/Kconfig"
1013
ad2f931d
JD
1014source "drivers/hwmon/Kconfig"
1015
1da177e4
LT
1016#source "drivers/l3/Kconfig"
1017
1018source "drivers/misc/Kconfig"
1019
a4e137ab
RK
1020source "drivers/mfd/Kconfig"
1021
c72a1d60
RP
1022source "drivers/leds/Kconfig"
1023
1da177e4
LT
1024source "drivers/media/Kconfig"
1025
1026source "drivers/video/Kconfig"
1027
1028source "sound/Kconfig"
1029
c2dade51
SH
1030source "drivers/hid/Kconfig"
1031
1da177e4
LT
1032source "drivers/usb/Kconfig"
1033
1034source "drivers/mmc/Kconfig"
1035
12b824fb
AZ
1036source "drivers/rtc/Kconfig"
1037
1da177e4
LT
1038endmenu
1039
1040source "fs/Kconfig"
1041
1042source "arch/arm/oprofile/Kconfig"
1043
1044source "arch/arm/Kconfig.debug"
1045
1046source "security/Kconfig"
1047
1048source "crypto/Kconfig"
1049
1050source "lib/Kconfig"