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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#
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
Alessandro Zummo12b824f2006-03-27 01:16:35 -080011 select RTC_LIB
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 help
13 The ARM series is a line of low-power-consumption RISC chip designs
Martin Michlmayrf6c89652006-02-08 21:09:07 +000014 licensed by ARM Ltd and targeted at embedded applications and
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
Martin Michlmayrf6c89652006-02-08 21:09:07 +000016 manufactured, but legacy ARM-based PC hardware remains popular in
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 Europe. There is an ARM Linux project with a web page at
18 <http://www.arm.linux.org.uk/>.
19
20config MMU
21 bool
22 default y
23
24config EISA
25 bool
26 ---help---
27 The Extended Industry Standard Architecture (EISA) bus was
28 developed as an open alternative to the IBM MicroChannel bus.
29
30 The EISA bus provided some of the features of the IBM MicroChannel
31 bus while maintaining backward compatibility with cards made for
32 the older ISA bus. The EISA bus saw limited use between 1988 and
33 1995 when it was made obsolete by the PCI bus.
34
35 Say Y here if you are building a kernel for an EISA-based machine.
36
37 Otherwise, say N.
38
39config SBUS
40 bool
41
42config MCA
43 bool
44 help
45 MicroChannel Architecture is found in some IBM PS/2 machines and
46 laptops. It is a bus system similar to PCI or ISA. See
47 <file:Documentation/mca.txt> (and especially the web page given
48 there) before attempting to build an MCA bus kernel.
49
Linus Torvalds1da177e2005-04-16 15:20:36 -070050config RWSEM_GENERIC_SPINLOCK
51 bool
52 default y
53
54config RWSEM_XCHGADD_ALGORITHM
55 bool
56
Akinobu Mitab89c3b12006-03-26 01:39:19 -080057config GENERIC_HWEIGHT
58 bool
59 default y
60
Linus Torvalds1da177e2005-04-16 15:20:36 -070061config GENERIC_CALIBRATE_DELAY
62 bool
63 default y
64
65config GENERIC_BUST_SPINLOCK
66 bool
67
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +010068config ARCH_MAY_HAVE_PC_FDC
69 bool
70
Linus Torvalds1da177e2005-04-16 15:20:36 -070071config GENERIC_ISA_DMA
72 bool
73
Linus Torvalds1da177e2005-04-16 15:20:36 -070074config FIQ
75 bool
76
Al Viro034d2f52005-12-19 16:27:59 -050077config ARCH_MTD_XIP
78 bool
79
Linus Torvalds1da177e2005-04-16 15:20:36 -070080source "init/Kconfig"
81
82menu "System Type"
83
84choice
85 prompt "ARM system type"
Catalin Marinas6a0e2432006-03-07 14:42:27 +000086 default ARCH_VERSATILE
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
88config ARCH_CLPS7500
89 bool "Cirrus-CL-PS7500FE"
90 select TIMER_ACORN
Russell Kingf7e68bb2005-05-05 14:49:01 +010091 select ISA
Martin Michlmayrf999b8b2006-02-08 21:09:05 +000092 help
93 Support for the Cirrus Logic PS7500FE system-on-a-chip.
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
95config ARCH_CLPS711X
96 bool "CLPS711x/EP721x-based"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +000097 help
98 Support for Cirrus Logic 711x/721x based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
100config ARCH_CO285
101 bool "Co-EBSA285"
102 select FOOTBRIDGE
103 select FOOTBRIDGE_ADDIN
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000104 help
105 Support for Intel's EBSA285 companion chip.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
107config ARCH_EBSA110
108 bool "EBSA-110"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100109 select ISA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 help
111 This is an evaluation board for the StrongARM processor available
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000112 from Digital. It has limited hardware on-board, including an
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 Ethernet interface, two PCMCIA sockets, two serial ports and a
114 parallel port.
115
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000116config ARCH_EP93XX
117 bool "EP93xx-based"
118 select ARM_AMBA
119 select ARM_VIC
120 help
121 This enables support for the Cirrus EP93xx series of CPUs.
122
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123config ARCH_FOOTBRIDGE
124 bool "FootBridge"
125 select FOOTBRIDGE
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000126 help
127 Support for systems based on the DC21285 companion chip
128 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
130config ARCH_INTEGRATOR
131 bool "Integrator"
132 select ARM_AMBA
133 select ICST525
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000134 help
135 Support for ARM's Integrator platform.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
137config ARCH_IOP3XX
138 bool "IOP3xx-based"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100139 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000140 help
141 Support for Intel's IOP3XX (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142
143config ARCH_IXP4XX
144 bool "IXP4xx-based"
145 select DMABOUNCE
Russell Kingf7e68bb2005-05-05 14:49:01 +0100146 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000147 help
148 Support for Intel's IXP4XX (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
150config ARCH_IXP2000
151 bool "IXP2400/2800-based"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100152 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000153 help
154 Support for Intel's IXP2400/2800 (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
156config ARCH_L7200
157 bool "LinkUp-L7200"
158 select FIQ
159 help
160 Say Y here if you intend to run this kernel on a LinkUp Systems
161 L7200 Software Development Board which uses an ARM720T processor.
162 Information on this board can be obtained at:
163
164 <http://www.linkupsys.com/>
165
166 If you have any questions or comments about the Linux kernel port
167 to this board, send e-mail to <sjhill@cotw.com>.
168
169config ARCH_PXA
170 bool "PXA2xx-based"
Al Viro034d2f52005-12-19 16:27:59 -0500171 select ARCH_MTD_XIP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000172 help
173 Support for Intel's PXA2XX processor line.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
175config ARCH_RPC
176 bool "RiscPC"
177 select ARCH_ACORN
178 select FIQ
179 select TIMER_ACORN
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100180 select ARCH_MAY_HAVE_PC_FDC
Russell King065909b2006-01-04 15:44:16 +0000181 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 help
183 On the Acorn Risc-PC, Linux can support the internal IDE disk and
184 CD-ROM interface, serial and parallel port, and the floppy drive.
185
186config ARCH_SA1100
187 bool "SA1100-based"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100188 select ISA
Russell King3cd9e192005-06-25 19:29:34 +0100189 select ARCH_DISCONTIGMEM_ENABLE
Al Viro034d2f52005-12-19 16:27:59 -0500190 select ARCH_MTD_XIP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000191 help
192 Support for StrongARM 11x0 based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193
194config ARCH_S3C2410
195 bool "Samsung S3C2410"
196 help
197 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
198 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000199 the Samsung SMDK2410 development board (and derivatives).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
201config ARCH_SHARK
202 bool "Shark"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100203 select ISA
204 select ISA_DMA
205 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000206 help
207 Support for the StrongARM based Digital DNARD machine, also known
208 as "Shark" (<http://www.shark-linux.de/shark.html>).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209
210config ARCH_LH7A40X
211 bool "Sharp LH7A40X"
212 help
213 Say Y here for systems based on one of the Sharp LH7A40X
214 System on a Chip processors. These CPUs include an ARM922T
215 core with a wide array of integrated devices for
216 hand-held and low-power applications.
217
218config ARCH_OMAP
219 bool "TI OMAP"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000220 help
221 Support for TI's OMAP platform (OMAP1 and OMAP2).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
223config ARCH_VERSATILE
224 bool "Versatile"
225 select ARM_AMBA
Russell Kingfa0fe482006-01-13 21:30:48 +0000226 select ARM_VIC
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 select ICST307
228 help
229 This enables support for ARM Ltd Versatile board.
230
Catalin Marinas8ad68bb2005-10-31 14:25:02 +0000231config ARCH_REALVIEW
232 bool "RealView"
233 select ARM_AMBA
234 select ICST307
235 help
236 This enables support for ARM Ltd RealView boards.
237
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238config ARCH_IMX
239 bool "IMX"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000240 help
241 Support for Motorola's i.MX family of processors (MX1, MXL).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
243config ARCH_H720X
244 bool "Hynix-HMS720x-based"
Russell King065909b2006-01-04 15:44:16 +0000245 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 help
247 This enables support for systems based on the Hynix HMS720x
248
Bellido Nicolas038c5b62005-06-20 18:51:05 +0100249config ARCH_AAEC2000
250 bool "Agilent AAEC-2000 based"
Bellido Nicolas049eb322005-10-28 16:51:44 +0100251 select ARM_AMBA
Bellido Nicolas038c5b62005-06-20 18:51:05 +0100252 help
253 This enables support for systems based on the Agilent AAEC-2000
254
SAN People73a59c12006-01-09 17:05:41 +0000255config ARCH_AT91RM9200
256 bool "AT91RM9200"
257 help
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000258 Say Y here if you intend to run this kernel on an Atmel
259 AT91RM9200-based board.
SAN People73a59c12006-01-09 17:05:41 +0000260
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261endchoice
262
263source "arch/arm/mach-clps711x/Kconfig"
264
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000265source "arch/arm/mach-ep93xx/Kconfig"
266
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267source "arch/arm/mach-footbridge/Kconfig"
268
269source "arch/arm/mach-integrator/Kconfig"
270
271source "arch/arm/mach-iop3xx/Kconfig"
272
273source "arch/arm/mach-ixp4xx/Kconfig"
274
275source "arch/arm/mach-ixp2000/Kconfig"
276
277source "arch/arm/mach-pxa/Kconfig"
278
279source "arch/arm/mach-sa1100/Kconfig"
280
Tony Lindgrend48af152005-07-10 19:58:17 +0100281source "arch/arm/plat-omap/Kconfig"
282
283source "arch/arm/mach-omap1/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284
Tony Lindgren1dbae812005-11-10 14:26:51 +0000285source "arch/arm/mach-omap2/Kconfig"
286
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287source "arch/arm/mach-s3c2410/Kconfig"
288
289source "arch/arm/mach-lh7a40x/Kconfig"
290
291source "arch/arm/mach-imx/Kconfig"
292
293source "arch/arm/mach-h720x/Kconfig"
294
295source "arch/arm/mach-versatile/Kconfig"
296
Bellido Nicolas038c5b62005-06-20 18:51:05 +0100297source "arch/arm/mach-aaec2000/Kconfig"
298
Catalin Marinas8ad68bb2005-10-31 14:25:02 +0000299source "arch/arm/mach-realview/Kconfig"
300
SAN People73a59c12006-01-09 17:05:41 +0000301source "arch/arm/mach-at91rm9200/Kconfig"
302
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303# Definitions to make life easier
304config ARCH_ACORN
305 bool
306
307source arch/arm/mm/Kconfig
308
309# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
310config XSCALE_PMU
311 bool
312 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
313 default y
314
315endmenu
316
317source "arch/arm/common/Kconfig"
318
319config FORCE_MAX_ZONEORDER
320 int
321 depends on SA1111
322 default "9"
323
324menu "Bus support"
325
326config ARM_AMBA
327 bool
328
329config ISA
330 bool
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 help
332 Find out whether you have ISA slots on your motherboard. ISA is the
333 name of a bus system, i.e. the way the CPU talks to the other stuff
334 inside your box. Other bus systems are PCI, EISA, MicroChannel
335 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
336 newer boards don't support it. If you have ISA, say Y, otherwise N.
337
Russell King065909b2006-01-04 15:44:16 +0000338# Select ISA DMA controller support
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339config ISA_DMA
340 bool
Russell King065909b2006-01-04 15:44:16 +0000341 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
Russell King065909b2006-01-04 15:44:16 +0000343# Select ISA DMA interface
Al Viro5cae8412005-05-04 05:39:22 +0100344config ISA_DMA_API
345 bool
Al Viro5cae8412005-05-04 05:39:22 +0100346
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347config PCI
Catalin Marinasc0da0852005-06-20 18:51:06 +0100348 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 help
350 Find out whether you have a PCI motherboard. PCI is the name of a
351 bus system, i.e. the way the CPU talks to the other stuff inside
352 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
353 VESA. If you have PCI, say Y, otherwise N.
354
355 The PCI-HOWTO, available from
356 <http://www.tldp.org/docs.html#howto>, contains valuable
357 information about which PCI hardware does work under Linux and which
358 doesn't.
359
360# Select the host bridge type
361config PCI_HOST_VIA82C505
362 bool
363 depends on PCI && ARCH_SHARK
364 default y
365
366source "drivers/pci/Kconfig"
367
368source "drivers/pcmcia/Kconfig"
369
370endmenu
371
372menu "Kernel Features"
373
374config SMP
375 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
Russell Kingf6db4492005-11-07 21:30:21 +0000376 depends on EXPERIMENTAL && REALVIEW_MPCORE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 help
378 This enables support for systems with more than one CPU. If you have
379 a system with only one CPU, like most personal computers, say N. If
380 you have a system with more than one CPU, say Y.
381
382 If you say N here, the kernel will run on single and multiprocessor
383 machines, but will use only one CPU of a multiprocessor machine. If
384 you say Y here, the kernel will run on many, but not all, single
385 processor machines. On a single processor machine, the kernel will
386 run faster if you say N here.
387
Arthur Othieno12c62c22005-09-10 00:26:22 -0700388 See also the <file:Documentation/smp.txt>,
389 <file:Documentation/i386/IO-APIC.txt>,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
391 <http://www.linuxdoc.org/docs.html#howto>.
392
393 If you don't know what to do here, say N.
394
395config NR_CPUS
396 int "Maximum number of CPUs (2-32)"
397 range 2 32
398 depends on SMP
399 default "4"
400
Russell Kinga054a812005-11-02 22:24:33 +0000401config HOTPLUG_CPU
402 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
403 depends on SMP && HOTPLUG && EXPERIMENTAL
404 help
405 Say Y here to experiment with turning CPUs off and on. CPUs
406 can be controlled through /sys/devices/system/cpu.
407
Russell King37ee16a2005-11-08 19:08:05 +0000408config LOCAL_TIMERS
409 bool "Use local timer interrupts"
Russell King2a98beb2005-11-09 10:50:29 +0000410 depends on SMP && REALVIEW_MPCORE
Russell King37ee16a2005-11-08 19:08:05 +0000411 default y
412 help
413 Enable support for local timers on SMP platforms, rather then the
414 legacy IPI broadcast method. Local timers allows the system
415 accounting to be spread across the timer interval, preventing a
416 "thundering herd" at every timer tick.
417
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418config PREEMPT
419 bool "Preemptible Kernel (EXPERIMENTAL)"
420 depends on EXPERIMENTAL
421 help
422 This option reduces the latency of the kernel when reacting to
423 real-time or interactive events by allowing a low priority process to
424 be preempted even if it is in kernel mode executing a system call.
425 This allows applications to run more reliably even when the system is
426 under load.
427
428 Say Y here if you are building a kernel for a desktop, embedded
429 or real-time system. Say N if you are unsure.
430
Russell King8749af62005-06-25 19:39:45 +0100431config NO_IDLE_HZ
432 bool "Dynamic tick timer"
433 help
434 Select this option if you want to disable continuous timer ticks
435 and have them programmed to occur as required. This option saves
436 power as the system can remain in idle state for longer.
437
438 By default dynamic tick is disabled during the boot, and can be
439 manually enabled with:
440
441 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
442
443 Alternatively, if you want dynamic tick automatically enabled
444 during boot, pass "dyntick=enable" via the kernel command string.
445
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100446 Please note that dynamic tick may affect the accuracy of
447 timekeeping on some platforms depending on the implementation.
Nicolas Pitre569d2c32005-09-01 12:48:48 +0100448 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
449 to have accurate timekeeping with dynamic tick.
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100450
Russell Kingf8065812006-03-02 22:41:59 +0000451config HZ
452 int
453 default 128 if ARCH_L7200
454 default 200 if ARCH_EBSA110 || ARCH_S3C2410
Russell Kingbfe65702006-03-04 11:01:53 +0000455 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
Russell Kingf8065812006-03-02 22:41:59 +0000456 default 100
457
Nicolas Pitre704bdda2006-01-14 16:33:50 +0000458config AEABI
459 bool "Use the ARM EABI to compile the kernel"
460 help
461 This option allows for the kernel to be compiled using the latest
462 ARM ABI (aka EABI). This is only useful if you are using a user
463 space environment that is also compiled with EABI.
464
465 Since there are major incompatibilities between the legacy ABI and
466 EABI, especially with regard to structure member alignment, this
467 option also changes the kernel syscall calling convention to
468 disambiguate both ABIs and allow for backward compatibility support
469 (selected with CONFIG_OABI_COMPAT).
470
471 To use this you need GCC version 4.0.0 or later.
472
Nicolas Pitre6c90c872006-01-14 16:37:15 +0000473config OABI_COMPAT
Russell Kinga73a3ff2006-02-08 21:09:55 +0000474 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
Nicolas Pitre61c484d2006-02-08 21:09:08 +0000475 depends on AEABI && EXPERIMENTAL
Nicolas Pitre6c90c872006-01-14 16:37:15 +0000476 default y
477 help
478 This option preserves the old syscall interface along with the
479 new (ARM EABI) one. It also provides a compatibility layer to
480 intercept syscalls that have structure arguments which layout
481 in memory differs between the legacy ABI and the new ARM EABI
482 (only for non "thumb" binaries). This option adds a tiny
483 overhead to all syscalls and produces a slightly larger kernel.
484 If you know you'll be using only pure EABI user space then you
485 can say N here. If this option is not selected and you attempt
486 to execute a legacy ABI binary then the result will be
487 UNPREDICTABLE (in fact it can be predicted that it won't work
488 at all). If in doubt say Y.
489
Dave Hansen3f22ab22005-06-23 00:07:43 -0700490config ARCH_DISCONTIGMEM_ENABLE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 bool
Russell Kingf7e68bb2005-05-05 14:49:01 +0100492 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 help
494 Say Y to support efficient handling of discontiguous physical memory,
495 for architectures which are either NUMA (Non-Uniform Memory Access)
496 or have huge holes in the physical address space for other reasons.
497 See <file:Documentation/vm/numa> for more.
498
Dave Hansen3f22ab22005-06-23 00:07:43 -0700499source "mm/Kconfig"
500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501config LEDS
502 bool "Timer and CPU usage LEDs"
503 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
504 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
505 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
506 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
SAN People73a59c12006-01-09 17:05:41 +0000507 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
508 ARCH_AT91RM9200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 help
510 If you say Y here, the LEDs on your machine will be used
511 to provide useful information about your current system status.
512
513 If you are compiling a kernel for a NetWinder or EBSA-285, you will
514 be able to select which LEDs are active using the options below. If
515 you are compiling a kernel for the EBSA-110 or the LART however, the
516 red LED will simply flash regularly to indicate that the system is
517 still functional. It is safe to say Y here if you have a CATS
518 system, but the driver will do nothing.
519
520config LEDS_TIMER
521 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
522 MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
523 depends on LEDS
524 default y if ARCH_EBSA110
525 help
526 If you say Y here, one of the system LEDs (the green one on the
527 NetWinder, the amber one on the EBSA285, or the red one on the LART)
528 will flash regularly to indicate that the system is still
529 operational. This is mainly useful to kernel hackers who are
530 debugging unstable kernels.
531
532 The LART uses the same LED for both Timer LED and CPU usage LED
533 functions. You may choose to use both, but the Timer LED function
534 will overrule the CPU usage LED.
535
536config LEDS_CPU
537 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
538 !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
539 depends on LEDS
540 help
541 If you say Y here, the red LED will be used to give a good real
542 time indication of CPU usage, by lighting whenever the idle task
543 is not currently executing.
544
545 The LART uses the same LED for both Timer LED and CPU usage LED
546 functions. You may choose to use both, but the Timer LED function
547 will overrule the CPU usage LED.
548
549config ALIGNMENT_TRAP
550 bool
551 default y if !ARCH_EBSA110
552 help
553 ARM processors can not fetch/store information which is not
554 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
555 address divisible by 4. On 32-bit ARM processors, these non-aligned
556 fetch/store instructions will be emulated in software if you say
557 here, which has a severe performance impact. This is necessary for
558 correct operation of some network protocols. With an IP-only
559 configuration it is safe to say N, otherwise say Y.
560
561endmenu
562
563menu "Boot options"
564
565# Compressed boot loader in ROM. Yes, we really want to ask about
566# TEXT and BSS so we preserve their values in the config files.
567config ZBOOT_ROM_TEXT
568 hex "Compressed ROM boot loader base address"
569 default "0"
570 help
571 The physical address at which the ROM-able zImage is to be
572 placed in the target. Platforms which normally make use of
573 ROM-able zImage formats normally set this to a suitable
574 value in their defconfig file.
575
576 If ZBOOT_ROM is not enabled, this has no effect.
577
578config ZBOOT_ROM_BSS
579 hex "Compressed ROM boot loader BSS address"
580 default "0"
581 help
582 The base address of 64KiB of read/write memory in the target
583 for the ROM-able zImage, which must be available while the
584 decompressor is running. Platforms which normally make use of
585 ROM-able zImage formats normally set this to a suitable
586 value in their defconfig file.
587
588 If ZBOOT_ROM is not enabled, this has no effect.
589
590config ZBOOT_ROM
591 bool "Compressed boot loader in ROM/flash"
592 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
593 help
594 Say Y here if you intend to execute your compressed kernel image
595 (zImage) directly from ROM or flash. If unsure, say N.
596
597config CMDLINE
598 string "Default kernel command string"
599 default ""
600 help
601 On some architectures (EBSA110 and CATS), there is currently no way
602 for the boot loader to pass arguments to the kernel. For these
603 architectures, you should supply some command-line options at build
604 time by entering them here. As a minimum, you should specify the
605 memory size and the root device (e.g., mem=64M root=/dev/nfs).
606
607config XIP_KERNEL
608 bool "Kernel Execute-In-Place from ROM"
609 depends on !ZBOOT_ROM
610 help
611 Execute-In-Place allows the kernel to run from non-volatile storage
612 directly addressable by the CPU, such as NOR flash. This saves RAM
613 space since the text section of the kernel is not loaded from flash
614 to RAM. Read-write sections, such as the data section and stack,
615 are still copied to RAM. The XIP kernel is not compressed since
616 it has to run directly from flash, so it will take more space to
617 store it. The flash address used to link the kernel object files,
618 and for storing it, is configuration dependent. Therefore, if you
619 say Y here, you must know the proper physical address where to
620 store the kernel image depending on your own flash memory usage.
621
622 Also note that the make target becomes "make xipImage" rather than
623 "make zImage" or "make Image". The final kernel binary to put in
624 ROM memory will be arch/arm/boot/xipImage.
625
626 If unsure, say N.
627
628config XIP_PHYS_ADDR
629 hex "XIP Kernel Physical Location"
630 depends on XIP_KERNEL
631 default "0x00080000"
632 help
633 This is the physical address in your flash memory the kernel will
634 be linked for and stored to. This address is dependent on your
635 own flash usage.
636
637endmenu
638
Tony Lindgrenec6bced2005-07-10 19:58:20 +0100639if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640
641menu "CPU Frequency scaling"
642
643source "drivers/cpufreq/Kconfig"
644
645config CPU_FREQ_SA1100
646 bool
Vincent Sanders07c6d482005-06-09 21:59:22 +0100647 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 default y
649
650config CPU_FREQ_SA1110
651 bool
652 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
653 default y
654
655config CPU_FREQ_INTEGRATOR
656 tristate "CPUfreq driver for ARM Integrator CPUs"
657 depends on ARCH_INTEGRATOR && CPU_FREQ
658 default y
659 help
660 This enables the CPUfreq driver for ARM Integrator CPUs.
661
662 For details, take a look at <file:Documentation/cpu-freq>.
663
664 If in doubt, say Y.
665
666endmenu
667
668endif
669
670menu "Floating point emulation"
671
672comment "At least one emulation must be selected"
673
674config FPE_NWFPE
675 bool "NWFPE math emulation"
Nicolas Pitre8993a442006-01-14 16:36:50 +0000676 depends on !AEABI || OABI_COMPAT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 ---help---
678 Say Y to include the NWFPE floating point emulator in the kernel.
679 This is necessary to run most binaries. Linux does not currently
680 support floating point hardware so you need to say Y here even if
681 your machine has an FPA or floating point co-processor podule.
682
683 You may say N here if you are going to load the Acorn FPEmulator
684 early in the bootup.
685
686config FPE_NWFPE_XP
687 bool "Support extended precision"
Lennert Buytenhekbedf1422005-11-07 21:12:08 +0000688 depends on FPE_NWFPE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 help
690 Say Y to include 80-bit support in the kernel floating-point
691 emulator. Otherwise, only 32 and 64-bit support is compiled in.
692 Note that gcc does not generate 80-bit operations by default,
693 so in most cases this option only enlarges the size of the
694 floating point emulator without any good reason.
695
696 You almost surely want to say N here.
697
698config FPE_FASTFPE
699 bool "FastFPE math emulation (EXPERIMENTAL)"
Nicolas Pitre8993a442006-01-14 16:36:50 +0000700 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 ---help---
702 Say Y here to include the FAST floating point emulator in the kernel.
703 This is an experimental much faster emulator which now also has full
704 precision for the mantissa. It does not support any exceptions.
705 It is very simple, and approximately 3-6 times faster than NWFPE.
706
707 It should be sufficient for most programs. It may be not suitable
708 for scientific calculations, but you have to check this for yourself.
709 If you do not feel you need a faster FP emulation you should better
710 choose NWFPE.
711
712config VFP
713 bool "VFP-format floating point maths"
714 depends on CPU_V6 || CPU_ARM926T
715 help
716 Say Y to include VFP support code in the kernel. This is needed
717 if your hardware includes a VFP unit.
718
719 Please see <file:Documentation/arm/VFP/release-notes.txt> for
720 release notes and additional status information.
721
722 Say N if your target does not have VFP hardware.
723
724endmenu
725
726menu "Userspace binary formats"
727
728source "fs/Kconfig.binfmt"
729
730config ARTHUR
731 tristate "RISC OS personality"
Nicolas Pitre704bdda2006-01-14 16:33:50 +0000732 depends on !AEABI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 help
734 Say Y here to include the kernel code necessary if you want to run
735 Acorn RISC OS/Arthur binaries under Linux. This code is still very
736 experimental; if this sounds frightening, say N and sleep in peace.
737 You can also say M here to compile this support as a module (which
738 will be called arthur).
739
740endmenu
741
742menu "Power management options"
743
Russell Kingeceab4a2005-11-15 11:31:41 +0000744source "kernel/power/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746config APM
747 tristate "Advanced Power Management Emulation"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 ---help---
749 APM is a BIOS specification for saving power using several different
750 techniques. This is mostly useful for battery powered laptops with
751 APM compliant BIOSes. If you say Y here, the system time will be
752 reset after a RESUME operation, the /proc/apm device will provide
753 battery status information, and user-space programs will receive
754 notification of APM "events" (e.g. battery status change).
755
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 In order to use APM, you will need supporting software. For location
757 and more information, read <file:Documentation/pm.txt> and the
758 Battery Powered Linux mini-HOWTO, available from
759 <http://www.tldp.org/docs.html#howto>.
760
761 This driver does not spin down disk drives (see the hdparm(8)
762 manpage ("man 8 hdparm") for that), and it doesn't turn off
763 VESA-compliant "green" monitors.
764
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 Generally, if you don't have a battery in your machine, there isn't
766 much point in using this driver and you should say N. If you get
767 random kernel OOPSes or reboots that don't seem to be related to
768 anything, try disabling/enabling this option (or disabling/enabling
769 APM in your BIOS).
770
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771endmenu
772
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700773source "net/Kconfig"
774
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775menu "Device Drivers"
776
777source "drivers/base/Kconfig"
778
Pavel Machekc35bf4a2005-11-12 20:25:25 +0000779source "drivers/connector/Kconfig"
780
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781if ALIGNMENT_TRAP
782source "drivers/mtd/Kconfig"
783endif
784
785source "drivers/parport/Kconfig"
786
787source "drivers/pnp/Kconfig"
788
789source "drivers/block/Kconfig"
790
791source "drivers/acorn/block/Kconfig"
792
David Brownellbb011b82005-06-12 23:26:05 +0100793if PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \
794 || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
Russell Kingd56c5242005-11-04 17:28:34 +0000795 || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796source "drivers/ide/Kconfig"
797endif
798
799source "drivers/scsi/Kconfig"
800
801source "drivers/md/Kconfig"
802
803source "drivers/message/fusion/Kconfig"
804
805source "drivers/ieee1394/Kconfig"
806
807source "drivers/message/i2o/Kconfig"
808
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700809source "drivers/net/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810
811source "drivers/isdn/Kconfig"
812
813# input before char - char/joystick depends on it. As does USB.
814
815source "drivers/input/Kconfig"
816
817source "drivers/char/Kconfig"
818
819source "drivers/i2c/Kconfig"
820
David Brownell8ae12a02006-01-08 13:34:19 -0800821source "drivers/spi/Kconfig"
822
Alessandro Zummo04916c02006-03-10 22:30:01 +0000823source "drivers/w1/Kconfig"
824
Jean Delvaread2f9312005-07-02 18:15:49 +0200825source "drivers/hwmon/Kconfig"
826
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827#source "drivers/l3/Kconfig"
828
829source "drivers/misc/Kconfig"
830
Russell Kinga4e137a2005-08-18 10:06:59 +0100831source "drivers/mfd/Kconfig"
832
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833source "drivers/media/Kconfig"
834
835source "drivers/video/Kconfig"
836
837source "sound/Kconfig"
838
839source "drivers/usb/Kconfig"
840
841source "drivers/mmc/Kconfig"
842
Alessandro Zummo12b824f2006-03-27 01:16:35 -0800843source "drivers/rtc/Kconfig"
844
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845endmenu
846
847source "fs/Kconfig"
848
849source "arch/arm/oprofile/Kconfig"
850
851source "arch/arm/Kconfig.debug"
852
853source "security/Kconfig"
854
855source "crypto/Kconfig"
856
857source "lib/Kconfig"