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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
11 help
12 The ARM series is a line of low-power-consumption RISC chip designs
Martin Michlmayrf6c89652006-02-08 21:09:07 +000013 licensed by ARM Ltd and targeted at embedded applications and
Linus Torvalds1da177e2005-04-16 15:20:36 -070014 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
Martin Michlmayrf6c89652006-02-08 21:09:07 +000015 manufactured, but legacy ARM-based PC hardware remains popular in
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 Europe. There is an ARM Linux project with a web page at
17 <http://www.arm.linux.org.uk/>.
18
19config MMU
20 bool
21 default y
22
23config EISA
24 bool
25 ---help---
26 The Extended Industry Standard Architecture (EISA) bus was
27 developed as an open alternative to the IBM MicroChannel bus.
28
29 The EISA bus provided some of the features of the IBM MicroChannel
30 bus while maintaining backward compatibility with cards made for
31 the older ISA bus. The EISA bus saw limited use between 1988 and
32 1995 when it was made obsolete by the PCI bus.
33
34 Say Y here if you are building a kernel for an EISA-based machine.
35
36 Otherwise, say N.
37
38config SBUS
39 bool
40
41config MCA
42 bool
43 help
44 MicroChannel Architecture is found in some IBM PS/2 machines and
45 laptops. It is a bus system similar to PCI or ISA. See
46 <file:Documentation/mca.txt> (and especially the web page given
47 there) before attempting to build an MCA bus kernel.
48
Linus Torvalds1da177e2005-04-16 15:20:36 -070049config RWSEM_GENERIC_SPINLOCK
50 bool
51 default y
52
53config RWSEM_XCHGADD_ALGORITHM
54 bool
55
56config GENERIC_CALIBRATE_DELAY
57 bool
58 default y
59
60config GENERIC_BUST_SPINLOCK
61 bool
62
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +010063config ARCH_MAY_HAVE_PC_FDC
64 bool
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066config GENERIC_ISA_DMA
67 bool
68
Linus Torvalds1da177e2005-04-16 15:20:36 -070069config FIQ
70 bool
71
Al Viro034d2f52005-12-19 16:27:59 -050072config ARCH_MTD_XIP
73 bool
74
Linus Torvalds1da177e2005-04-16 15:20:36 -070075source "init/Kconfig"
76
77menu "System Type"
78
79choice
80 prompt "ARM system type"
Catalin Marinas6a0e2432006-03-07 14:42:27 +000081 default ARCH_VERSATILE
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
83config ARCH_CLPS7500
84 bool "Cirrus-CL-PS7500FE"
85 select TIMER_ACORN
Russell Kingf7e68bb2005-05-05 14:49:01 +010086 select ISA
Martin Michlmayrf999b8b2006-02-08 21:09:05 +000087 help
88 Support for the Cirrus Logic PS7500FE system-on-a-chip.
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
90config ARCH_CLPS711X
91 bool "CLPS711x/EP721x-based"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +000092 help
93 Support for Cirrus Logic 711x/721x based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
95config ARCH_CO285
96 bool "Co-EBSA285"
97 select FOOTBRIDGE
98 select FOOTBRIDGE_ADDIN
Martin Michlmayrf999b8b2006-02-08 21:09:05 +000099 help
100 Support for Intel's EBSA285 companion chip.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
102config ARCH_EBSA110
103 bool "EBSA-110"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100104 select ISA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 help
106 This is an evaluation board for the StrongARM processor available
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000107 from Digital. It has limited hardware on-board, including an
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 Ethernet interface, two PCMCIA sockets, two serial ports and a
109 parallel port.
110
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111config ARCH_FOOTBRIDGE
112 bool "FootBridge"
113 select FOOTBRIDGE
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000114 help
115 Support for systems based on the DC21285 companion chip
116 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
118config ARCH_INTEGRATOR
119 bool "Integrator"
120 select ARM_AMBA
121 select ICST525
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000122 help
123 Support for ARM's Integrator platform.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
125config ARCH_IOP3XX
126 bool "IOP3xx-based"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100127 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000128 help
129 Support for Intel's IOP3XX (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
131config ARCH_IXP4XX
132 bool "IXP4xx-based"
133 select DMABOUNCE
Russell Kingf7e68bb2005-05-05 14:49:01 +0100134 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000135 help
136 Support for Intel's IXP4XX (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
138config ARCH_IXP2000
139 bool "IXP2400/2800-based"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100140 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000141 help
142 Support for Intel's IXP2400/2800 (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
144config ARCH_L7200
145 bool "LinkUp-L7200"
146 select FIQ
147 help
148 Say Y here if you intend to run this kernel on a LinkUp Systems
149 L7200 Software Development Board which uses an ARM720T processor.
150 Information on this board can be obtained at:
151
152 <http://www.linkupsys.com/>
153
154 If you have any questions or comments about the Linux kernel port
155 to this board, send e-mail to <sjhill@cotw.com>.
156
157config ARCH_PXA
158 bool "PXA2xx-based"
Al Viro034d2f52005-12-19 16:27:59 -0500159 select ARCH_MTD_XIP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000160 help
161 Support for Intel's PXA2XX processor line.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
163config ARCH_RPC
164 bool "RiscPC"
165 select ARCH_ACORN
166 select FIQ
167 select TIMER_ACORN
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100168 select ARCH_MAY_HAVE_PC_FDC
Russell King065909b2006-01-04 15:44:16 +0000169 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 help
171 On the Acorn Risc-PC, Linux can support the internal IDE disk and
172 CD-ROM interface, serial and parallel port, and the floppy drive.
173
174config ARCH_SA1100
175 bool "SA1100-based"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100176 select ISA
Russell King3cd9e192005-06-25 19:29:34 +0100177 select ARCH_DISCONTIGMEM_ENABLE
Al Viro034d2f52005-12-19 16:27:59 -0500178 select ARCH_MTD_XIP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000179 help
180 Support for StrongARM 11x0 based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
182config ARCH_S3C2410
183 bool "Samsung S3C2410"
184 help
185 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
186 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000187 the Samsung SMDK2410 development board (and derivatives).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
189config ARCH_SHARK
190 bool "Shark"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100191 select ISA
192 select ISA_DMA
193 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000194 help
195 Support for the StrongARM based Digital DNARD machine, also known
196 as "Shark" (<http://www.shark-linux.de/shark.html>).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
198config ARCH_LH7A40X
199 bool "Sharp LH7A40X"
200 help
201 Say Y here for systems based on one of the Sharp LH7A40X
202 System on a Chip processors. These CPUs include an ARM922T
203 core with a wide array of integrated devices for
204 hand-held and low-power applications.
205
206config ARCH_OMAP
207 bool "TI OMAP"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000208 help
209 Support for TI's OMAP platform (OMAP1 and OMAP2).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
211config ARCH_VERSATILE
212 bool "Versatile"
213 select ARM_AMBA
Russell Kingfa0fe482006-01-13 21:30:48 +0000214 select ARM_VIC
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 select ICST307
216 help
217 This enables support for ARM Ltd Versatile board.
218
Catalin Marinas8ad68bb2005-10-31 14:25:02 +0000219config ARCH_REALVIEW
220 bool "RealView"
221 select ARM_AMBA
222 select ICST307
223 help
224 This enables support for ARM Ltd RealView boards.
225
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226config ARCH_IMX
227 bool "IMX"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000228 help
229 Support for Motorola's i.MX family of processors (MX1, MXL).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
231config ARCH_H720X
232 bool "Hynix-HMS720x-based"
Russell King065909b2006-01-04 15:44:16 +0000233 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 help
235 This enables support for systems based on the Hynix HMS720x
236
Bellido Nicolas038c5b62005-06-20 18:51:05 +0100237config ARCH_AAEC2000
238 bool "Agilent AAEC-2000 based"
Bellido Nicolas049eb322005-10-28 16:51:44 +0100239 select ARM_AMBA
Bellido Nicolas038c5b62005-06-20 18:51:05 +0100240 help
241 This enables support for systems based on the Agilent AAEC-2000
242
SAN People73a59c12006-01-09 17:05:41 +0000243config ARCH_AT91RM9200
244 bool "AT91RM9200"
245 help
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000246 Say Y here if you intend to run this kernel on an Atmel
247 AT91RM9200-based board.
SAN People73a59c12006-01-09 17:05:41 +0000248
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249endchoice
250
251source "arch/arm/mach-clps711x/Kconfig"
252
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253source "arch/arm/mach-footbridge/Kconfig"
254
255source "arch/arm/mach-integrator/Kconfig"
256
257source "arch/arm/mach-iop3xx/Kconfig"
258
259source "arch/arm/mach-ixp4xx/Kconfig"
260
261source "arch/arm/mach-ixp2000/Kconfig"
262
263source "arch/arm/mach-pxa/Kconfig"
264
265source "arch/arm/mach-sa1100/Kconfig"
266
Tony Lindgrend48af152005-07-10 19:58:17 +0100267source "arch/arm/plat-omap/Kconfig"
268
269source "arch/arm/mach-omap1/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270
Tony Lindgren1dbae812005-11-10 14:26:51 +0000271source "arch/arm/mach-omap2/Kconfig"
272
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273source "arch/arm/mach-s3c2410/Kconfig"
274
275source "arch/arm/mach-lh7a40x/Kconfig"
276
277source "arch/arm/mach-imx/Kconfig"
278
279source "arch/arm/mach-h720x/Kconfig"
280
281source "arch/arm/mach-versatile/Kconfig"
282
Bellido Nicolas038c5b62005-06-20 18:51:05 +0100283source "arch/arm/mach-aaec2000/Kconfig"
284
Catalin Marinas8ad68bb2005-10-31 14:25:02 +0000285source "arch/arm/mach-realview/Kconfig"
286
SAN People73a59c12006-01-09 17:05:41 +0000287source "arch/arm/mach-at91rm9200/Kconfig"
288
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289# Definitions to make life easier
290config ARCH_ACORN
291 bool
292
293source arch/arm/mm/Kconfig
294
295# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
296config XSCALE_PMU
297 bool
298 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
299 default y
300
301endmenu
302
303source "arch/arm/common/Kconfig"
304
305config FORCE_MAX_ZONEORDER
306 int
307 depends on SA1111
308 default "9"
309
310menu "Bus support"
311
312config ARM_AMBA
313 bool
314
315config ISA
316 bool
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 help
318 Find out whether you have ISA slots on your motherboard. ISA is the
319 name of a bus system, i.e. the way the CPU talks to the other stuff
320 inside your box. Other bus systems are PCI, EISA, MicroChannel
321 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
322 newer boards don't support it. If you have ISA, say Y, otherwise N.
323
Russell King065909b2006-01-04 15:44:16 +0000324# Select ISA DMA controller support
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325config ISA_DMA
326 bool
Russell King065909b2006-01-04 15:44:16 +0000327 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
Russell King065909b2006-01-04 15:44:16 +0000329# Select ISA DMA interface
Al Viro5cae8412005-05-04 05:39:22 +0100330config ISA_DMA_API
331 bool
Al Viro5cae8412005-05-04 05:39:22 +0100332
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333config PCI
Catalin Marinasc0da0852005-06-20 18:51:06 +0100334 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 help
336 Find out whether you have a PCI motherboard. PCI is the name of a
337 bus system, i.e. the way the CPU talks to the other stuff inside
338 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
339 VESA. If you have PCI, say Y, otherwise N.
340
341 The PCI-HOWTO, available from
342 <http://www.tldp.org/docs.html#howto>, contains valuable
343 information about which PCI hardware does work under Linux and which
344 doesn't.
345
346# Select the host bridge type
347config PCI_HOST_VIA82C505
348 bool
349 depends on PCI && ARCH_SHARK
350 default y
351
352source "drivers/pci/Kconfig"
353
354source "drivers/pcmcia/Kconfig"
355
356endmenu
357
358menu "Kernel Features"
359
360config SMP
361 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
Russell Kingf6db4492005-11-07 21:30:21 +0000362 depends on EXPERIMENTAL && REALVIEW_MPCORE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 help
364 This enables support for systems with more than one CPU. If you have
365 a system with only one CPU, like most personal computers, say N. If
366 you have a system with more than one CPU, say Y.
367
368 If you say N here, the kernel will run on single and multiprocessor
369 machines, but will use only one CPU of a multiprocessor machine. If
370 you say Y here, the kernel will run on many, but not all, single
371 processor machines. On a single processor machine, the kernel will
372 run faster if you say N here.
373
Arthur Othieno12c62c22005-09-10 00:26:22 -0700374 See also the <file:Documentation/smp.txt>,
375 <file:Documentation/i386/IO-APIC.txt>,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
377 <http://www.linuxdoc.org/docs.html#howto>.
378
379 If you don't know what to do here, say N.
380
381config NR_CPUS
382 int "Maximum number of CPUs (2-32)"
383 range 2 32
384 depends on SMP
385 default "4"
386
Russell Kinga054a812005-11-02 22:24:33 +0000387config HOTPLUG_CPU
388 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
389 depends on SMP && HOTPLUG && EXPERIMENTAL
390 help
391 Say Y here to experiment with turning CPUs off and on. CPUs
392 can be controlled through /sys/devices/system/cpu.
393
Russell King37ee16a2005-11-08 19:08:05 +0000394config LOCAL_TIMERS
395 bool "Use local timer interrupts"
Russell King2a98beb2005-11-09 10:50:29 +0000396 depends on SMP && REALVIEW_MPCORE
Russell King37ee16a2005-11-08 19:08:05 +0000397 default y
398 help
399 Enable support for local timers on SMP platforms, rather then the
400 legacy IPI broadcast method. Local timers allows the system
401 accounting to be spread across the timer interval, preventing a
402 "thundering herd" at every timer tick.
403
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404config PREEMPT
405 bool "Preemptible Kernel (EXPERIMENTAL)"
406 depends on EXPERIMENTAL
407 help
408 This option reduces the latency of the kernel when reacting to
409 real-time or interactive events by allowing a low priority process to
410 be preempted even if it is in kernel mode executing a system call.
411 This allows applications to run more reliably even when the system is
412 under load.
413
414 Say Y here if you are building a kernel for a desktop, embedded
415 or real-time system. Say N if you are unsure.
416
Russell King8749af62005-06-25 19:39:45 +0100417config NO_IDLE_HZ
418 bool "Dynamic tick timer"
419 help
420 Select this option if you want to disable continuous timer ticks
421 and have them programmed to occur as required. This option saves
422 power as the system can remain in idle state for longer.
423
424 By default dynamic tick is disabled during the boot, and can be
425 manually enabled with:
426
427 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
428
429 Alternatively, if you want dynamic tick automatically enabled
430 during boot, pass "dyntick=enable" via the kernel command string.
431
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100432 Please note that dynamic tick may affect the accuracy of
433 timekeeping on some platforms depending on the implementation.
Nicolas Pitre569d2c32005-09-01 12:48:48 +0100434 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
435 to have accurate timekeeping with dynamic tick.
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100436
Russell Kingf8065812006-03-02 22:41:59 +0000437config HZ
438 int
439 default 128 if ARCH_L7200
440 default 200 if ARCH_EBSA110 || ARCH_S3C2410
Russell Kingbfe65702006-03-04 11:01:53 +0000441 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
Russell Kingf8065812006-03-02 22:41:59 +0000442 default 100
443
Nicolas Pitre704bdda2006-01-14 16:33:50 +0000444config AEABI
445 bool "Use the ARM EABI to compile the kernel"
446 help
447 This option allows for the kernel to be compiled using the latest
448 ARM ABI (aka EABI). This is only useful if you are using a user
449 space environment that is also compiled with EABI.
450
451 Since there are major incompatibilities between the legacy ABI and
452 EABI, especially with regard to structure member alignment, this
453 option also changes the kernel syscall calling convention to
454 disambiguate both ABIs and allow for backward compatibility support
455 (selected with CONFIG_OABI_COMPAT).
456
457 To use this you need GCC version 4.0.0 or later.
458
Nicolas Pitre6c90c872006-01-14 16:37:15 +0000459config OABI_COMPAT
Russell Kinga73a3ff2006-02-08 21:09:55 +0000460 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
Nicolas Pitre61c484d2006-02-08 21:09:08 +0000461 depends on AEABI && EXPERIMENTAL
Nicolas Pitre6c90c872006-01-14 16:37:15 +0000462 default y
463 help
464 This option preserves the old syscall interface along with the
465 new (ARM EABI) one. It also provides a compatibility layer to
466 intercept syscalls that have structure arguments which layout
467 in memory differs between the legacy ABI and the new ARM EABI
468 (only for non "thumb" binaries). This option adds a tiny
469 overhead to all syscalls and produces a slightly larger kernel.
470 If you know you'll be using only pure EABI user space then you
471 can say N here. If this option is not selected and you attempt
472 to execute a legacy ABI binary then the result will be
473 UNPREDICTABLE (in fact it can be predicted that it won't work
474 at all). If in doubt say Y.
475
Dave Hansen3f22ab22005-06-23 00:07:43 -0700476config ARCH_DISCONTIGMEM_ENABLE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 bool
Russell Kingf7e68bb2005-05-05 14:49:01 +0100478 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 help
480 Say Y to support efficient handling of discontiguous physical memory,
481 for architectures which are either NUMA (Non-Uniform Memory Access)
482 or have huge holes in the physical address space for other reasons.
483 See <file:Documentation/vm/numa> for more.
484
Dave Hansen3f22ab22005-06-23 00:07:43 -0700485source "mm/Kconfig"
486
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487config LEDS
488 bool "Timer and CPU usage LEDs"
489 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
490 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
491 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
492 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
SAN People73a59c12006-01-09 17:05:41 +0000493 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
494 ARCH_AT91RM9200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 help
496 If you say Y here, the LEDs on your machine will be used
497 to provide useful information about your current system status.
498
499 If you are compiling a kernel for a NetWinder or EBSA-285, you will
500 be able to select which LEDs are active using the options below. If
501 you are compiling a kernel for the EBSA-110 or the LART however, the
502 red LED will simply flash regularly to indicate that the system is
503 still functional. It is safe to say Y here if you have a CATS
504 system, but the driver will do nothing.
505
506config LEDS_TIMER
507 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
508 MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
509 depends on LEDS
510 default y if ARCH_EBSA110
511 help
512 If you say Y here, one of the system LEDs (the green one on the
513 NetWinder, the amber one on the EBSA285, or the red one on the LART)
514 will flash regularly to indicate that the system is still
515 operational. This is mainly useful to kernel hackers who are
516 debugging unstable kernels.
517
518 The LART uses the same LED for both Timer LED and CPU usage LED
519 functions. You may choose to use both, but the Timer LED function
520 will overrule the CPU usage LED.
521
522config LEDS_CPU
523 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
524 !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
525 depends on LEDS
526 help
527 If you say Y here, the red LED will be used to give a good real
528 time indication of CPU usage, by lighting whenever the idle task
529 is not currently executing.
530
531 The LART uses the same LED for both Timer LED and CPU usage LED
532 functions. You may choose to use both, but the Timer LED function
533 will overrule the CPU usage LED.
534
535config ALIGNMENT_TRAP
536 bool
537 default y if !ARCH_EBSA110
538 help
539 ARM processors can not fetch/store information which is not
540 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
541 address divisible by 4. On 32-bit ARM processors, these non-aligned
542 fetch/store instructions will be emulated in software if you say
543 here, which has a severe performance impact. This is necessary for
544 correct operation of some network protocols. With an IP-only
545 configuration it is safe to say N, otherwise say Y.
546
547endmenu
548
549menu "Boot options"
550
551# Compressed boot loader in ROM. Yes, we really want to ask about
552# TEXT and BSS so we preserve their values in the config files.
553config ZBOOT_ROM_TEXT
554 hex "Compressed ROM boot loader base address"
555 default "0"
556 help
557 The physical address at which the ROM-able zImage is to be
558 placed in the target. Platforms which normally make use of
559 ROM-able zImage formats normally set this to a suitable
560 value in their defconfig file.
561
562 If ZBOOT_ROM is not enabled, this has no effect.
563
564config ZBOOT_ROM_BSS
565 hex "Compressed ROM boot loader BSS address"
566 default "0"
567 help
568 The base address of 64KiB of read/write memory in the target
569 for the ROM-able zImage, which must be available while the
570 decompressor is running. Platforms which normally make use of
571 ROM-able zImage formats normally set this to a suitable
572 value in their defconfig file.
573
574 If ZBOOT_ROM is not enabled, this has no effect.
575
576config ZBOOT_ROM
577 bool "Compressed boot loader in ROM/flash"
578 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
579 help
580 Say Y here if you intend to execute your compressed kernel image
581 (zImage) directly from ROM or flash. If unsure, say N.
582
583config CMDLINE
584 string "Default kernel command string"
585 default ""
586 help
587 On some architectures (EBSA110 and CATS), there is currently no way
588 for the boot loader to pass arguments to the kernel. For these
589 architectures, you should supply some command-line options at build
590 time by entering them here. As a minimum, you should specify the
591 memory size and the root device (e.g., mem=64M root=/dev/nfs).
592
593config XIP_KERNEL
594 bool "Kernel Execute-In-Place from ROM"
595 depends on !ZBOOT_ROM
596 help
597 Execute-In-Place allows the kernel to run from non-volatile storage
598 directly addressable by the CPU, such as NOR flash. This saves RAM
599 space since the text section of the kernel is not loaded from flash
600 to RAM. Read-write sections, such as the data section and stack,
601 are still copied to RAM. The XIP kernel is not compressed since
602 it has to run directly from flash, so it will take more space to
603 store it. The flash address used to link the kernel object files,
604 and for storing it, is configuration dependent. Therefore, if you
605 say Y here, you must know the proper physical address where to
606 store the kernel image depending on your own flash memory usage.
607
608 Also note that the make target becomes "make xipImage" rather than
609 "make zImage" or "make Image". The final kernel binary to put in
610 ROM memory will be arch/arm/boot/xipImage.
611
612 If unsure, say N.
613
614config XIP_PHYS_ADDR
615 hex "XIP Kernel Physical Location"
616 depends on XIP_KERNEL
617 default "0x00080000"
618 help
619 This is the physical address in your flash memory the kernel will
620 be linked for and stored to. This address is dependent on your
621 own flash usage.
622
623endmenu
624
Tony Lindgrenec6bced2005-07-10 19:58:20 +0100625if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626
627menu "CPU Frequency scaling"
628
629source "drivers/cpufreq/Kconfig"
630
631config CPU_FREQ_SA1100
632 bool
Vincent Sanders07c6d482005-06-09 21:59:22 +0100633 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 -0700634 default y
635
636config CPU_FREQ_SA1110
637 bool
638 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
639 default y
640
641config CPU_FREQ_INTEGRATOR
642 tristate "CPUfreq driver for ARM Integrator CPUs"
643 depends on ARCH_INTEGRATOR && CPU_FREQ
644 default y
645 help
646 This enables the CPUfreq driver for ARM Integrator CPUs.
647
648 For details, take a look at <file:Documentation/cpu-freq>.
649
650 If in doubt, say Y.
651
652endmenu
653
654endif
655
656menu "Floating point emulation"
657
658comment "At least one emulation must be selected"
659
660config FPE_NWFPE
661 bool "NWFPE math emulation"
Nicolas Pitre8993a442006-01-14 16:36:50 +0000662 depends on !AEABI || OABI_COMPAT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 ---help---
664 Say Y to include the NWFPE floating point emulator in the kernel.
665 This is necessary to run most binaries. Linux does not currently
666 support floating point hardware so you need to say Y here even if
667 your machine has an FPA or floating point co-processor podule.
668
669 You may say N here if you are going to load the Acorn FPEmulator
670 early in the bootup.
671
672config FPE_NWFPE_XP
673 bool "Support extended precision"
Lennert Buytenhekbedf1422005-11-07 21:12:08 +0000674 depends on FPE_NWFPE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 help
676 Say Y to include 80-bit support in the kernel floating-point
677 emulator. Otherwise, only 32 and 64-bit support is compiled in.
678 Note that gcc does not generate 80-bit operations by default,
679 so in most cases this option only enlarges the size of the
680 floating point emulator without any good reason.
681
682 You almost surely want to say N here.
683
684config FPE_FASTFPE
685 bool "FastFPE math emulation (EXPERIMENTAL)"
Nicolas Pitre8993a442006-01-14 16:36:50 +0000686 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 ---help---
688 Say Y here to include the FAST floating point emulator in the kernel.
689 This is an experimental much faster emulator which now also has full
690 precision for the mantissa. It does not support any exceptions.
691 It is very simple, and approximately 3-6 times faster than NWFPE.
692
693 It should be sufficient for most programs. It may be not suitable
694 for scientific calculations, but you have to check this for yourself.
695 If you do not feel you need a faster FP emulation you should better
696 choose NWFPE.
697
698config VFP
699 bool "VFP-format floating point maths"
700 depends on CPU_V6 || CPU_ARM926T
701 help
702 Say Y to include VFP support code in the kernel. This is needed
703 if your hardware includes a VFP unit.
704
705 Please see <file:Documentation/arm/VFP/release-notes.txt> for
706 release notes and additional status information.
707
708 Say N if your target does not have VFP hardware.
709
710endmenu
711
712menu "Userspace binary formats"
713
714source "fs/Kconfig.binfmt"
715
716config ARTHUR
717 tristate "RISC OS personality"
Nicolas Pitre704bdda2006-01-14 16:33:50 +0000718 depends on !AEABI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 help
720 Say Y here to include the kernel code necessary if you want to run
721 Acorn RISC OS/Arthur binaries under Linux. This code is still very
722 experimental; if this sounds frightening, say N and sleep in peace.
723 You can also say M here to compile this support as a module (which
724 will be called arthur).
725
726endmenu
727
728menu "Power management options"
729
Russell Kingeceab4a2005-11-15 11:31:41 +0000730source "kernel/power/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732config APM
733 tristate "Advanced Power Management Emulation"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 ---help---
735 APM is a BIOS specification for saving power using several different
736 techniques. This is mostly useful for battery powered laptops with
737 APM compliant BIOSes. If you say Y here, the system time will be
738 reset after a RESUME operation, the /proc/apm device will provide
739 battery status information, and user-space programs will receive
740 notification of APM "events" (e.g. battery status change).
741
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 In order to use APM, you will need supporting software. For location
743 and more information, read <file:Documentation/pm.txt> and the
744 Battery Powered Linux mini-HOWTO, available from
745 <http://www.tldp.org/docs.html#howto>.
746
747 This driver does not spin down disk drives (see the hdparm(8)
748 manpage ("man 8 hdparm") for that), and it doesn't turn off
749 VESA-compliant "green" monitors.
750
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 Generally, if you don't have a battery in your machine, there isn't
752 much point in using this driver and you should say N. If you get
753 random kernel OOPSes or reboots that don't seem to be related to
754 anything, try disabling/enabling this option (or disabling/enabling
755 APM in your BIOS).
756
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757endmenu
758
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700759source "net/Kconfig"
760
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761menu "Device Drivers"
762
763source "drivers/base/Kconfig"
764
Pavel Machekc35bf4a2005-11-12 20:25:25 +0000765source "drivers/connector/Kconfig"
766
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767if ALIGNMENT_TRAP
768source "drivers/mtd/Kconfig"
769endif
770
771source "drivers/parport/Kconfig"
772
773source "drivers/pnp/Kconfig"
774
775source "drivers/block/Kconfig"
776
777source "drivers/acorn/block/Kconfig"
778
David Brownellbb011b82005-06-12 23:26:05 +0100779if PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \
780 || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
Russell Kingd56c5242005-11-04 17:28:34 +0000781 || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782source "drivers/ide/Kconfig"
783endif
784
785source "drivers/scsi/Kconfig"
786
787source "drivers/md/Kconfig"
788
789source "drivers/message/fusion/Kconfig"
790
791source "drivers/ieee1394/Kconfig"
792
793source "drivers/message/i2o/Kconfig"
794
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700795source "drivers/net/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796
797source "drivers/isdn/Kconfig"
798
799# input before char - char/joystick depends on it. As does USB.
800
801source "drivers/input/Kconfig"
802
803source "drivers/char/Kconfig"
804
805source "drivers/i2c/Kconfig"
806
David Brownell8ae12a02006-01-08 13:34:19 -0800807source "drivers/spi/Kconfig"
808
Alessandro Zummo04916c02006-03-10 22:30:01 +0000809source "drivers/w1/Kconfig"
810
Jean Delvaread2f9312005-07-02 18:15:49 +0200811source "drivers/hwmon/Kconfig"
812
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813#source "drivers/l3/Kconfig"
814
815source "drivers/misc/Kconfig"
816
Russell Kinga4e137a2005-08-18 10:06:59 +0100817source "drivers/mfd/Kconfig"
818
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819source "drivers/media/Kconfig"
820
821source "drivers/video/Kconfig"
822
823source "sound/Kconfig"
824
825source "drivers/usb/Kconfig"
826
827source "drivers/mmc/Kconfig"
828
829endmenu
830
831source "fs/Kconfig"
832
833source "arch/arm/oprofile/Kconfig"
834
835source "arch/arm/Kconfig.debug"
836
837source "security/Kconfig"
838
839source "crypto/Kconfig"
840
841source "lib/Kconfig"