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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
72source "init/Kconfig"
73
74menu "System Type"
75
76choice
77 prompt "ARM system type"
78 default ARCH_RPC
79
80config ARCH_CLPS7500
81 bool "Cirrus-CL-PS7500FE"
82 select TIMER_ACORN
Russell Kingf7e68bb2005-05-05 14:49:01 +010083 select ISA
Martin Michlmayrf999b8b2006-02-08 21:09:05 +000084 help
85 Support for the Cirrus Logic PS7500FE system-on-a-chip.
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
87config ARCH_CLPS711X
88 bool "CLPS711x/EP721x-based"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +000089 help
90 Support for Cirrus Logic 711x/721x based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92config ARCH_CO285
93 bool "Co-EBSA285"
94 select FOOTBRIDGE
95 select FOOTBRIDGE_ADDIN
Martin Michlmayrf999b8b2006-02-08 21:09:05 +000096 help
97 Support for Intel's EBSA285 companion chip.
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
99config ARCH_EBSA110
100 bool "EBSA-110"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100101 select ISA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 help
103 This is an evaluation board for the StrongARM processor available
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000104 from Digital. It has limited hardware on-board, including an
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 Ethernet interface, two PCMCIA sockets, two serial ports and a
106 parallel port.
107
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108config ARCH_FOOTBRIDGE
109 bool "FootBridge"
110 select FOOTBRIDGE
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000111 help
112 Support for systems based on the DC21285 companion chip
113 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
115config ARCH_INTEGRATOR
116 bool "Integrator"
117 select ARM_AMBA
118 select ICST525
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000119 help
120 Support for ARM's Integrator platform.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
122config ARCH_IOP3XX
123 bool "IOP3xx-based"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100124 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000125 help
126 Support for Intel's IOP3XX (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
128config ARCH_IXP4XX
129 bool "IXP4xx-based"
130 select DMABOUNCE
Russell Kingf7e68bb2005-05-05 14:49:01 +0100131 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000132 help
133 Support for Intel's IXP4XX (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
135config ARCH_IXP2000
136 bool "IXP2400/2800-based"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100137 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000138 help
139 Support for Intel's IXP2400/2800 (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140
141config ARCH_L7200
142 bool "LinkUp-L7200"
143 select FIQ
144 help
145 Say Y here if you intend to run this kernel on a LinkUp Systems
146 L7200 Software Development Board which uses an ARM720T processor.
147 Information on this board can be obtained at:
148
149 <http://www.linkupsys.com/>
150
151 If you have any questions or comments about the Linux kernel port
152 to this board, send e-mail to <sjhill@cotw.com>.
153
154config ARCH_PXA
155 bool "PXA2xx-based"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000156 help
157 Support for Intel's PXA2XX processor line.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
159config ARCH_RPC
160 bool "RiscPC"
161 select ARCH_ACORN
162 select FIQ
163 select TIMER_ACORN
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100164 select ARCH_MAY_HAVE_PC_FDC
Russell King065909b2006-01-04 15:44:16 +0000165 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 help
167 On the Acorn Risc-PC, Linux can support the internal IDE disk and
168 CD-ROM interface, serial and parallel port, and the floppy drive.
169
170config ARCH_SA1100
171 bool "SA1100-based"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100172 select ISA
Russell King3cd9e192005-06-25 19:29:34 +0100173 select ARCH_DISCONTIGMEM_ENABLE
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000174 help
175 Support for StrongARM 11x0 based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176
177config ARCH_S3C2410
178 bool "Samsung S3C2410"
179 help
180 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
181 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000182 the Samsung SMDK2410 development board (and derivatives).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
184config ARCH_SHARK
185 bool "Shark"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100186 select ISA
187 select ISA_DMA
188 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000189 help
190 Support for the StrongARM based Digital DNARD machine, also known
191 as "Shark" (<http://www.shark-linux.de/shark.html>).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
193config ARCH_LH7A40X
194 bool "Sharp LH7A40X"
195 help
196 Say Y here for systems based on one of the Sharp LH7A40X
197 System on a Chip processors. These CPUs include an ARM922T
198 core with a wide array of integrated devices for
199 hand-held and low-power applications.
200
201config ARCH_OMAP
202 bool "TI OMAP"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000203 help
204 Support for TI's OMAP platform (OMAP1 and OMAP2).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
206config ARCH_VERSATILE
207 bool "Versatile"
208 select ARM_AMBA
Russell Kingfa0fe482006-01-13 21:30:48 +0000209 select ARM_VIC
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 select ICST307
211 help
212 This enables support for ARM Ltd Versatile board.
213
Catalin Marinas8ad68bb2005-10-31 14:25:02 +0000214config ARCH_REALVIEW
215 bool "RealView"
216 select ARM_AMBA
217 select ICST307
218 help
219 This enables support for ARM Ltd RealView boards.
220
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221config ARCH_IMX
222 bool "IMX"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000223 help
224 Support for Motorola's i.MX family of processors (MX1, MXL).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
226config ARCH_H720X
227 bool "Hynix-HMS720x-based"
Russell King065909b2006-01-04 15:44:16 +0000228 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 help
230 This enables support for systems based on the Hynix HMS720x
231
Bellido Nicolas038c5b62005-06-20 18:51:05 +0100232config ARCH_AAEC2000
233 bool "Agilent AAEC-2000 based"
Bellido Nicolas049eb322005-10-28 16:51:44 +0100234 select ARM_AMBA
Bellido Nicolas038c5b62005-06-20 18:51:05 +0100235 help
236 This enables support for systems based on the Agilent AAEC-2000
237
SAN People73a59c12006-01-09 17:05:41 +0000238config ARCH_AT91RM9200
239 bool "AT91RM9200"
240 help
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000241 Say Y here if you intend to run this kernel on an Atmel
242 AT91RM9200-based board.
SAN People73a59c12006-01-09 17:05:41 +0000243
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244endchoice
245
246source "arch/arm/mach-clps711x/Kconfig"
247
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248source "arch/arm/mach-footbridge/Kconfig"
249
250source "arch/arm/mach-integrator/Kconfig"
251
252source "arch/arm/mach-iop3xx/Kconfig"
253
254source "arch/arm/mach-ixp4xx/Kconfig"
255
256source "arch/arm/mach-ixp2000/Kconfig"
257
258source "arch/arm/mach-pxa/Kconfig"
259
260source "arch/arm/mach-sa1100/Kconfig"
261
Tony Lindgrend48af152005-07-10 19:58:17 +0100262source "arch/arm/plat-omap/Kconfig"
263
264source "arch/arm/mach-omap1/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265
Tony Lindgren1dbae812005-11-10 14:26:51 +0000266source "arch/arm/mach-omap2/Kconfig"
267
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268source "arch/arm/mach-s3c2410/Kconfig"
269
270source "arch/arm/mach-lh7a40x/Kconfig"
271
272source "arch/arm/mach-imx/Kconfig"
273
274source "arch/arm/mach-h720x/Kconfig"
275
276source "arch/arm/mach-versatile/Kconfig"
277
Bellido Nicolas038c5b62005-06-20 18:51:05 +0100278source "arch/arm/mach-aaec2000/Kconfig"
279
Catalin Marinas8ad68bb2005-10-31 14:25:02 +0000280source "arch/arm/mach-realview/Kconfig"
281
SAN People73a59c12006-01-09 17:05:41 +0000282source "arch/arm/mach-at91rm9200/Kconfig"
283
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284# Definitions to make life easier
285config ARCH_ACORN
286 bool
287
288source arch/arm/mm/Kconfig
289
290# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
291config XSCALE_PMU
292 bool
293 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
294 default y
295
296endmenu
297
298source "arch/arm/common/Kconfig"
299
300config FORCE_MAX_ZONEORDER
301 int
302 depends on SA1111
303 default "9"
304
305menu "Bus support"
306
307config ARM_AMBA
308 bool
309
310config ISA
311 bool
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 help
313 Find out whether you have ISA slots on your motherboard. ISA is the
314 name of a bus system, i.e. the way the CPU talks to the other stuff
315 inside your box. Other bus systems are PCI, EISA, MicroChannel
316 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
317 newer boards don't support it. If you have ISA, say Y, otherwise N.
318
Russell King065909b2006-01-04 15:44:16 +0000319# Select ISA DMA controller support
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320config ISA_DMA
321 bool
Russell King065909b2006-01-04 15:44:16 +0000322 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
Russell King065909b2006-01-04 15:44:16 +0000324# Select ISA DMA interface
Al Viro5cae8412005-05-04 05:39:22 +0100325config ISA_DMA_API
326 bool
Al Viro5cae8412005-05-04 05:39:22 +0100327
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328config PCI
Catalin Marinasc0da0852005-06-20 18:51:06 +0100329 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 help
331 Find out whether you have a PCI motherboard. PCI is the name of a
332 bus system, i.e. the way the CPU talks to the other stuff inside
333 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
334 VESA. If you have PCI, say Y, otherwise N.
335
336 The PCI-HOWTO, available from
337 <http://www.tldp.org/docs.html#howto>, contains valuable
338 information about which PCI hardware does work under Linux and which
339 doesn't.
340
341# Select the host bridge type
342config PCI_HOST_VIA82C505
343 bool
344 depends on PCI && ARCH_SHARK
345 default y
346
347source "drivers/pci/Kconfig"
348
349source "drivers/pcmcia/Kconfig"
350
351endmenu
352
353menu "Kernel Features"
354
355config SMP
356 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
Russell Kingf6db4492005-11-07 21:30:21 +0000357 depends on EXPERIMENTAL && REALVIEW_MPCORE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 help
359 This enables support for systems with more than one CPU. If you have
360 a system with only one CPU, like most personal computers, say N. If
361 you have a system with more than one CPU, say Y.
362
363 If you say N here, the kernel will run on single and multiprocessor
364 machines, but will use only one CPU of a multiprocessor machine. If
365 you say Y here, the kernel will run on many, but not all, single
366 processor machines. On a single processor machine, the kernel will
367 run faster if you say N here.
368
Arthur Othieno12c62c22005-09-10 00:26:22 -0700369 See also the <file:Documentation/smp.txt>,
370 <file:Documentation/i386/IO-APIC.txt>,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
372 <http://www.linuxdoc.org/docs.html#howto>.
373
374 If you don't know what to do here, say N.
375
376config NR_CPUS
377 int "Maximum number of CPUs (2-32)"
378 range 2 32
379 depends on SMP
380 default "4"
381
Russell Kinga054a812005-11-02 22:24:33 +0000382config HOTPLUG_CPU
383 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
384 depends on SMP && HOTPLUG && EXPERIMENTAL
385 help
386 Say Y here to experiment with turning CPUs off and on. CPUs
387 can be controlled through /sys/devices/system/cpu.
388
Russell King37ee16a2005-11-08 19:08:05 +0000389config LOCAL_TIMERS
390 bool "Use local timer interrupts"
Russell King2a98beb2005-11-09 10:50:29 +0000391 depends on SMP && REALVIEW_MPCORE
Russell King37ee16a2005-11-08 19:08:05 +0000392 default y
393 help
394 Enable support for local timers on SMP platforms, rather then the
395 legacy IPI broadcast method. Local timers allows the system
396 accounting to be spread across the timer interval, preventing a
397 "thundering herd" at every timer tick.
398
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399config PREEMPT
400 bool "Preemptible Kernel (EXPERIMENTAL)"
401 depends on EXPERIMENTAL
402 help
403 This option reduces the latency of the kernel when reacting to
404 real-time or interactive events by allowing a low priority process to
405 be preempted even if it is in kernel mode executing a system call.
406 This allows applications to run more reliably even when the system is
407 under load.
408
409 Say Y here if you are building a kernel for a desktop, embedded
410 or real-time system. Say N if you are unsure.
411
Russell King8749af62005-06-25 19:39:45 +0100412config NO_IDLE_HZ
413 bool "Dynamic tick timer"
414 help
415 Select this option if you want to disable continuous timer ticks
416 and have them programmed to occur as required. This option saves
417 power as the system can remain in idle state for longer.
418
419 By default dynamic tick is disabled during the boot, and can be
420 manually enabled with:
421
422 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
423
424 Alternatively, if you want dynamic tick automatically enabled
425 during boot, pass "dyntick=enable" via the kernel command string.
426
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100427 Please note that dynamic tick may affect the accuracy of
428 timekeeping on some platforms depending on the implementation.
Nicolas Pitre569d2c32005-09-01 12:48:48 +0100429 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
430 to have accurate timekeeping with dynamic tick.
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100431
Nicolas Pitre704bdda2006-01-14 16:33:50 +0000432config AEABI
433 bool "Use the ARM EABI to compile the kernel"
434 help
435 This option allows for the kernel to be compiled using the latest
436 ARM ABI (aka EABI). This is only useful if you are using a user
437 space environment that is also compiled with EABI.
438
439 Since there are major incompatibilities between the legacy ABI and
440 EABI, especially with regard to structure member alignment, this
441 option also changes the kernel syscall calling convention to
442 disambiguate both ABIs and allow for backward compatibility support
443 (selected with CONFIG_OABI_COMPAT).
444
445 To use this you need GCC version 4.0.0 or later.
446
Nicolas Pitre6c90c872006-01-14 16:37:15 +0000447config OABI_COMPAT
448 bool "Allow old ABI binaries to run with this kernel"
449 depends on AEABI
450 default y
451 help
452 This option preserves the old syscall interface along with the
453 new (ARM EABI) one. It also provides a compatibility layer to
454 intercept syscalls that have structure arguments which layout
455 in memory differs between the legacy ABI and the new ARM EABI
456 (only for non "thumb" binaries). This option adds a tiny
457 overhead to all syscalls and produces a slightly larger kernel.
458 If you know you'll be using only pure EABI user space then you
459 can say N here. If this option is not selected and you attempt
460 to execute a legacy ABI binary then the result will be
461 UNPREDICTABLE (in fact it can be predicted that it won't work
462 at all). If in doubt say Y.
463
Dave Hansen3f22ab22005-06-23 00:07:43 -0700464config ARCH_DISCONTIGMEM_ENABLE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 bool
Russell Kingf7e68bb2005-05-05 14:49:01 +0100466 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 help
468 Say Y to support efficient handling of discontiguous physical memory,
469 for architectures which are either NUMA (Non-Uniform Memory Access)
470 or have huge holes in the physical address space for other reasons.
471 See <file:Documentation/vm/numa> for more.
472
Dave Hansen3f22ab22005-06-23 00:07:43 -0700473source "mm/Kconfig"
474
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475config LEDS
476 bool "Timer and CPU usage LEDs"
477 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
478 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
479 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
480 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
SAN People73a59c12006-01-09 17:05:41 +0000481 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
482 ARCH_AT91RM9200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 help
484 If you say Y here, the LEDs on your machine will be used
485 to provide useful information about your current system status.
486
487 If you are compiling a kernel for a NetWinder or EBSA-285, you will
488 be able to select which LEDs are active using the options below. If
489 you are compiling a kernel for the EBSA-110 or the LART however, the
490 red LED will simply flash regularly to indicate that the system is
491 still functional. It is safe to say Y here if you have a CATS
492 system, but the driver will do nothing.
493
494config LEDS_TIMER
495 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
496 MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
497 depends on LEDS
498 default y if ARCH_EBSA110
499 help
500 If you say Y here, one of the system LEDs (the green one on the
501 NetWinder, the amber one on the EBSA285, or the red one on the LART)
502 will flash regularly to indicate that the system is still
503 operational. This is mainly useful to kernel hackers who are
504 debugging unstable kernels.
505
506 The LART uses the same LED for both Timer LED and CPU usage LED
507 functions. You may choose to use both, but the Timer LED function
508 will overrule the CPU usage LED.
509
510config LEDS_CPU
511 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
512 !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
513 depends on LEDS
514 help
515 If you say Y here, the red LED will be used to give a good real
516 time indication of CPU usage, by lighting whenever the idle task
517 is not currently executing.
518
519 The LART uses the same LED for both Timer LED and CPU usage LED
520 functions. You may choose to use both, but the Timer LED function
521 will overrule the CPU usage LED.
522
523config ALIGNMENT_TRAP
524 bool
525 default y if !ARCH_EBSA110
526 help
527 ARM processors can not fetch/store information which is not
528 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
529 address divisible by 4. On 32-bit ARM processors, these non-aligned
530 fetch/store instructions will be emulated in software if you say
531 here, which has a severe performance impact. This is necessary for
532 correct operation of some network protocols. With an IP-only
533 configuration it is safe to say N, otherwise say Y.
534
535endmenu
536
537menu "Boot options"
538
539# Compressed boot loader in ROM. Yes, we really want to ask about
540# TEXT and BSS so we preserve their values in the config files.
541config ZBOOT_ROM_TEXT
542 hex "Compressed ROM boot loader base address"
543 default "0"
544 help
545 The physical address at which the ROM-able zImage is to be
546 placed in the target. Platforms which normally make use of
547 ROM-able zImage formats normally set this to a suitable
548 value in their defconfig file.
549
550 If ZBOOT_ROM is not enabled, this has no effect.
551
552config ZBOOT_ROM_BSS
553 hex "Compressed ROM boot loader BSS address"
554 default "0"
555 help
556 The base address of 64KiB of read/write memory in the target
557 for the ROM-able zImage, which must be available while the
558 decompressor is running. 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
565 bool "Compressed boot loader in ROM/flash"
566 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
567 help
568 Say Y here if you intend to execute your compressed kernel image
569 (zImage) directly from ROM or flash. If unsure, say N.
570
571config CMDLINE
572 string "Default kernel command string"
573 default ""
574 help
575 On some architectures (EBSA110 and CATS), there is currently no way
576 for the boot loader to pass arguments to the kernel. For these
577 architectures, you should supply some command-line options at build
578 time by entering them here. As a minimum, you should specify the
579 memory size and the root device (e.g., mem=64M root=/dev/nfs).
580
581config XIP_KERNEL
582 bool "Kernel Execute-In-Place from ROM"
583 depends on !ZBOOT_ROM
584 help
585 Execute-In-Place allows the kernel to run from non-volatile storage
586 directly addressable by the CPU, such as NOR flash. This saves RAM
587 space since the text section of the kernel is not loaded from flash
588 to RAM. Read-write sections, such as the data section and stack,
589 are still copied to RAM. The XIP kernel is not compressed since
590 it has to run directly from flash, so it will take more space to
591 store it. The flash address used to link the kernel object files,
592 and for storing it, is configuration dependent. Therefore, if you
593 say Y here, you must know the proper physical address where to
594 store the kernel image depending on your own flash memory usage.
595
596 Also note that the make target becomes "make xipImage" rather than
597 "make zImage" or "make Image". The final kernel binary to put in
598 ROM memory will be arch/arm/boot/xipImage.
599
600 If unsure, say N.
601
602config XIP_PHYS_ADDR
603 hex "XIP Kernel Physical Location"
604 depends on XIP_KERNEL
605 default "0x00080000"
606 help
607 This is the physical address in your flash memory the kernel will
608 be linked for and stored to. This address is dependent on your
609 own flash usage.
610
611endmenu
612
Tony Lindgrenec6bced2005-07-10 19:58:20 +0100613if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614
615menu "CPU Frequency scaling"
616
617source "drivers/cpufreq/Kconfig"
618
619config CPU_FREQ_SA1100
620 bool
Vincent Sanders07c6d482005-06-09 21:59:22 +0100621 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 -0700622 default y
623
624config CPU_FREQ_SA1110
625 bool
626 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
627 default y
628
629config CPU_FREQ_INTEGRATOR
630 tristate "CPUfreq driver for ARM Integrator CPUs"
631 depends on ARCH_INTEGRATOR && CPU_FREQ
632 default y
633 help
634 This enables the CPUfreq driver for ARM Integrator CPUs.
635
636 For details, take a look at <file:Documentation/cpu-freq>.
637
638 If in doubt, say Y.
639
640endmenu
641
642endif
643
644menu "Floating point emulation"
645
646comment "At least one emulation must be selected"
647
648config FPE_NWFPE
649 bool "NWFPE math emulation"
Nicolas Pitre8993a442006-01-14 16:36:50 +0000650 depends on !AEABI || OABI_COMPAT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 ---help---
652 Say Y to include the NWFPE floating point emulator in the kernel.
653 This is necessary to run most binaries. Linux does not currently
654 support floating point hardware so you need to say Y here even if
655 your machine has an FPA or floating point co-processor podule.
656
657 You may say N here if you are going to load the Acorn FPEmulator
658 early in the bootup.
659
660config FPE_NWFPE_XP
661 bool "Support extended precision"
Lennert Buytenhekbedf1422005-11-07 21:12:08 +0000662 depends on FPE_NWFPE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 help
664 Say Y to include 80-bit support in the kernel floating-point
665 emulator. Otherwise, only 32 and 64-bit support is compiled in.
666 Note that gcc does not generate 80-bit operations by default,
667 so in most cases this option only enlarges the size of the
668 floating point emulator without any good reason.
669
670 You almost surely want to say N here.
671
672config FPE_FASTFPE
673 bool "FastFPE math emulation (EXPERIMENTAL)"
Nicolas Pitre8993a442006-01-14 16:36:50 +0000674 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 ---help---
676 Say Y here to include the FAST floating point emulator in the kernel.
677 This is an experimental much faster emulator which now also has full
678 precision for the mantissa. It does not support any exceptions.
679 It is very simple, and approximately 3-6 times faster than NWFPE.
680
681 It should be sufficient for most programs. It may be not suitable
682 for scientific calculations, but you have to check this for yourself.
683 If you do not feel you need a faster FP emulation you should better
684 choose NWFPE.
685
686config VFP
687 bool "VFP-format floating point maths"
688 depends on CPU_V6 || CPU_ARM926T
689 help
690 Say Y to include VFP support code in the kernel. This is needed
691 if your hardware includes a VFP unit.
692
693 Please see <file:Documentation/arm/VFP/release-notes.txt> for
694 release notes and additional status information.
695
696 Say N if your target does not have VFP hardware.
697
698endmenu
699
700menu "Userspace binary formats"
701
702source "fs/Kconfig.binfmt"
703
704config ARTHUR
705 tristate "RISC OS personality"
Nicolas Pitre704bdda2006-01-14 16:33:50 +0000706 depends on !AEABI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 help
708 Say Y here to include the kernel code necessary if you want to run
709 Acorn RISC OS/Arthur binaries under Linux. This code is still very
710 experimental; if this sounds frightening, say N and sleep in peace.
711 You can also say M here to compile this support as a module (which
712 will be called arthur).
713
714endmenu
715
716menu "Power management options"
717
Russell Kingeceab4a2005-11-15 11:31:41 +0000718source "kernel/power/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720config APM
721 tristate "Advanced Power Management Emulation"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 ---help---
723 APM is a BIOS specification for saving power using several different
724 techniques. This is mostly useful for battery powered laptops with
725 APM compliant BIOSes. If you say Y here, the system time will be
726 reset after a RESUME operation, the /proc/apm device will provide
727 battery status information, and user-space programs will receive
728 notification of APM "events" (e.g. battery status change).
729
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 In order to use APM, you will need supporting software. For location
731 and more information, read <file:Documentation/pm.txt> and the
732 Battery Powered Linux mini-HOWTO, available from
733 <http://www.tldp.org/docs.html#howto>.
734
735 This driver does not spin down disk drives (see the hdparm(8)
736 manpage ("man 8 hdparm") for that), and it doesn't turn off
737 VESA-compliant "green" monitors.
738
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 Generally, if you don't have a battery in your machine, there isn't
740 much point in using this driver and you should say N. If you get
741 random kernel OOPSes or reboots that don't seem to be related to
742 anything, try disabling/enabling this option (or disabling/enabling
743 APM in your BIOS).
744
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745endmenu
746
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700747source "net/Kconfig"
748
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749menu "Device Drivers"
750
751source "drivers/base/Kconfig"
752
Pavel Machekc35bf4a2005-11-12 20:25:25 +0000753source "drivers/connector/Kconfig"
754
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755if ALIGNMENT_TRAP
756source "drivers/mtd/Kconfig"
757endif
758
759source "drivers/parport/Kconfig"
760
761source "drivers/pnp/Kconfig"
762
763source "drivers/block/Kconfig"
764
765source "drivers/acorn/block/Kconfig"
766
David Brownellbb011b82005-06-12 23:26:05 +0100767if PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \
768 || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
Russell Kingd56c5242005-11-04 17:28:34 +0000769 || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770source "drivers/ide/Kconfig"
771endif
772
773source "drivers/scsi/Kconfig"
774
775source "drivers/md/Kconfig"
776
777source "drivers/message/fusion/Kconfig"
778
779source "drivers/ieee1394/Kconfig"
780
781source "drivers/message/i2o/Kconfig"
782
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700783source "drivers/net/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784
785source "drivers/isdn/Kconfig"
786
787# input before char - char/joystick depends on it. As does USB.
788
789source "drivers/input/Kconfig"
790
791source "drivers/char/Kconfig"
792
793source "drivers/i2c/Kconfig"
794
David Brownell8ae12a02006-01-08 13:34:19 -0800795source "drivers/spi/Kconfig"
796
Jean Delvaread2f9312005-07-02 18:15:49 +0200797source "drivers/hwmon/Kconfig"
798
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799#source "drivers/l3/Kconfig"
800
801source "drivers/misc/Kconfig"
802
Russell Kinga4e137a2005-08-18 10:06:59 +0100803source "drivers/mfd/Kconfig"
804
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805source "drivers/media/Kconfig"
806
807source "drivers/video/Kconfig"
808
809source "sound/Kconfig"
810
811source "drivers/usb/Kconfig"
812
813source "drivers/mmc/Kconfig"
814
815endmenu
816
817source "fs/Kconfig"
818
819source "arch/arm/oprofile/Kconfig"
820
821source "arch/arm/Kconfig.debug"
822
823source "security/Kconfig"
824
825source "crypto/Kconfig"
826
827source "lib/Kconfig"