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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
Kevin Hilman746140c2006-09-22 00:16:30 +010020config GENERIC_TIME
21 bool
22 default n
23
Linus Torvalds1da177e2005-04-16 15:20:36 -070024config MMU
25 bool
26 default y
27
28config EISA
29 bool
30 ---help---
31 The Extended Industry Standard Architecture (EISA) bus was
32 developed as an open alternative to the IBM MicroChannel bus.
33
34 The EISA bus provided some of the features of the IBM MicroChannel
35 bus while maintaining backward compatibility with cards made for
36 the older ISA bus. The EISA bus saw limited use between 1988 and
37 1995 when it was made obsolete by the PCI bus.
38
39 Say Y here if you are building a kernel for an EISA-based machine.
40
41 Otherwise, say N.
42
43config SBUS
44 bool
45
46config MCA
47 bool
48 help
49 MicroChannel Architecture is found in some IBM PS/2 machines and
50 laptops. It is a bus system similar to PCI or ISA. See
51 <file:Documentation/mca.txt> (and especially the web page given
52 there) before attempting to build an MCA bus kernel.
53
Thomas Gleixner4a2581a2006-07-01 22:30:09 +010054config GENERIC_HARDIRQS
55 bool
56 default y
57
Russell King7ad1bcb2006-08-27 12:07:02 +010058config TRACE_IRQFLAGS_SUPPORT
59 bool
60 default y
61
Thomas Gleixner4a2581a2006-07-01 22:30:09 +010062config HARDIRQS_SW_RESEND
63 bool
64 default y
65
66config GENERIC_IRQ_PROBE
67 bool
68 default y
69
Linus Torvalds1da177e2005-04-16 15:20:36 -070070config RWSEM_GENERIC_SPINLOCK
71 bool
72 default y
73
74config RWSEM_XCHGADD_ALGORITHM
75 bool
76
David Howellsf0d1b0b2006-12-08 02:37:49 -080077config ARCH_HAS_ILOG2_U32
78 bool
79 default n
80
81config ARCH_HAS_ILOG2_U64
82 bool
83 default n
84
Akinobu Mitab89c3b12006-03-26 01:39:19 -080085config GENERIC_HWEIGHT
86 bool
87 default y
88
Linus Torvalds1da177e2005-04-16 15:20:36 -070089config GENERIC_CALIBRATE_DELAY
90 bool
91 default y
92
93config GENERIC_BUST_SPINLOCK
94 bool
95
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +010096config ARCH_MAY_HAVE_PC_FDC
97 bool
98
Linus Torvalds1da177e2005-04-16 15:20:36 -070099config GENERIC_ISA_DMA
100 bool
101
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102config FIQ
103 bool
104
Al Viro034d2f52005-12-19 16:27:59 -0500105config ARCH_MTD_XIP
106 bool
107
Hyok S. Choic760fc12006-03-27 15:18:50 +0100108config VECTORS_BASE
109 hex
Hyok S. Choi6afd6fa2006-09-28 21:46:34 +0900110 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
Hyok S. Choic760fc12006-03-27 15:18:50 +0100111 default DRAM_BASE if REMAP_VECTORS_TO_RAM
112 default 0x00000000
113 help
114 The base address of exception vectors.
115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116source "init/Kconfig"
117
118menu "System Type"
119
120choice
121 prompt "ARM system type"
Catalin Marinas6a0e2432006-03-07 14:42:27 +0000122 default ARCH_VERSATILE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100124config ARCH_AAEC2000
125 bool "Agilent AAEC-2000 based"
126 select ARM_AMBA
127 help
128 This enables support for systems based on the Agilent AAEC-2000
129
130config ARCH_INTEGRATOR
131 bool "ARM Ltd. Integrator family"
132 select ARM_AMBA
133 select ICST525
134 help
135 Support for ARM's Integrator platform.
136
137config ARCH_REALVIEW
138 bool "ARM Ltd. RealView family"
139 select ARM_AMBA
140 select ICST307
141 help
142 This enables support for ARM Ltd RealView boards.
143
144config ARCH_VERSATILE
145 bool "ARM Ltd. Versatile family"
146 select ARM_AMBA
147 select ARM_VIC
148 select ICST307
149 help
150 This enables support for ARM Ltd Versatile board.
151
Andrew Victor8fc5ffa2006-06-29 16:06:33 +0100152config ARCH_AT91
153 bool "Atmel AT91"
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100154 help
Andrew Victor8fc5ffa2006-06-29 16:06:33 +0100155 This enables support for systems based on the Atmel AT91RM9200
156 and AT91SAM9xxx processors.
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158config ARCH_CLPS7500
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100159 bool "Cirrus CL-PS7500FE"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 select TIMER_ACORN
Russell Kingf7e68bb2005-05-05 14:49:01 +0100161 select ISA
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000162 help
163 Support for the Cirrus Logic PS7500FE system-on-a-chip.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
165config ARCH_CLPS711X
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100166 bool "Cirrus Logic CLPS711x/EP721x-based"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000167 help
168 Support for Cirrus Logic 711x/721x based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
170config ARCH_CO285
171 bool "Co-EBSA285"
172 select FOOTBRIDGE
173 select FOOTBRIDGE_ADDIN
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000174 help
175 Support for Intel's EBSA285 companion chip.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176
177config ARCH_EBSA110
178 bool "EBSA-110"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100179 select ISA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 help
181 This is an evaluation board for the StrongARM processor available
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000182 from Digital. It has limited hardware on-board, including an
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 Ethernet interface, two PCMCIA sockets, two serial ports and a
184 parallel port.
185
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000186config ARCH_EP93XX
187 bool "EP93xx-based"
188 select ARM_AMBA
189 select ARM_VIC
190 help
191 This enables support for the Cirrus EP93xx series of CPUs.
192
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193config ARCH_FOOTBRIDGE
194 bool "FootBridge"
195 select FOOTBRIDGE
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000196 help
197 Support for systems based on the DC21285 companion chip
198 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100200config ARCH_NETX
201 bool "Hilscher NetX based"
202 select ARM_VIC
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000203 help
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100204 This enables support for systems based on the Hilscher NetX Soc
205
206config ARCH_H720X
207 bool "Hynix HMS720x-based"
208 select ISA_DMA_API
209 help
210 This enables support for systems based on the Hynix HMS720x
211
212config ARCH_IMX
213 bool "IMX"
214 help
215 Support for Motorola's i.MX family of processors (MX1, MXL).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100217config ARCH_IOP32X
218 bool "IOP32x-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100219 depends on MMU
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100220 select PLAT_IOP
Russell Kingf7e68bb2005-05-05 14:49:01 +0100221 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000222 help
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100223 Support for Intel's 80219 and IOP32X (XScale) family of
224 processors.
225
226config ARCH_IOP33X
227 bool "IOP33x-based"
228 depends on MMU
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100229 select PLAT_IOP
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100230 select PCI
231 help
232 Support for Intel's IOP33X (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Dan Williams285f5fa2006-12-07 02:59:39 +0100234config ARCH_IOP13XX
235 bool "IOP13xx-based"
236 select PCI
237 help
238 Support for Intel's IOP13XX (XScale) family of processors.
239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240config ARCH_IXP4XX
241 bool "IXP4xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100242 depends on MMU
Kevin Hilman84904d02006-09-22 00:58:57 +0100243 select GENERIC_TIME
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000244 help
245 Support for Intel's IXP4XX (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
247config ARCH_IXP2000
248 bool "IXP2400/2800-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100249 depends on MMU
Russell Kingf7e68bb2005-05-05 14:49:01 +0100250 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000251 help
252 Support for Intel's IXP2400/2800 (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100254config ARCH_IXP23XX
255 bool "IXP23XX-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100256 depends on MMU
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100257 select PCI
258 help
259 Support for Intel's IXP23xx (XScale) family of processors.
260
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261config ARCH_L7200
262 bool "LinkUp-L7200"
263 select FIQ
264 help
265 Say Y here if you intend to run this kernel on a LinkUp Systems
266 L7200 Software Development Board which uses an ARM720T processor.
267 Information on this board can be obtained at:
268
269 <http://www.linkupsys.com/>
270
271 If you have any questions or comments about the Linux kernel port
272 to this board, send e-mail to <sjhill@cotw.com>.
273
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100274config ARCH_PNX4008
275 bool "Philips Nexperia PNX4008 Mobile"
276 help
277 This enables support for Philips PNX4008 mobile platform.
278
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279config ARCH_PXA
280 bool "PXA2xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100281 depends on MMU
Al Viro034d2f52005-12-19 16:27:59 -0500282 select ARCH_MTD_XIP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000283 help
284 Support for Intel's PXA2XX processor line.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
286config ARCH_RPC
287 bool "RiscPC"
288 select ARCH_ACORN
289 select FIQ
290 select TIMER_ACORN
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100291 select ARCH_MAY_HAVE_PC_FDC
Russell King065909b2006-01-04 15:44:16 +0000292 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 help
294 On the Acorn Risc-PC, Linux can support the internal IDE disk and
295 CD-ROM interface, serial and parallel port, and the floppy drive.
296
297config ARCH_SA1100
298 bool "SA1100-based"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100299 select ISA
Russell King3cd9e192005-06-25 19:29:34 +0100300 select ARCH_DISCONTIGMEM_ENABLE
Al Viro034d2f52005-12-19 16:27:59 -0500301 select ARCH_MTD_XIP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000302 help
303 Support for StrongARM 11x0 based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
305config ARCH_S3C2410
Ben Dookse4d06e32007-02-16 12:12:31 +0100306 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 help
308 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
309 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000310 the Samsung SMDK2410 development board (and derivatives).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
312config ARCH_SHARK
313 bool "Shark"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100314 select ISA
315 select ISA_DMA
316 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000317 help
318 Support for the StrongARM based Digital DNARD machine, also known
319 as "Shark" (<http://www.shark-linux.de/shark.html>).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
321config ARCH_LH7A40X
322 bool "Sharp LH7A40X"
323 help
324 Say Y here for systems based on one of the Sharp LH7A40X
325 System on a Chip processors. These CPUs include an ARM922T
326 core with a wide array of integrated devices for
327 hand-held and low-power applications.
328
329config ARCH_OMAP
330 bool "TI OMAP"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000331 help
332 Support for TI's OMAP platform (OMAP1 and OMAP2).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334endchoice
335
336source "arch/arm/mach-clps711x/Kconfig"
337
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000338source "arch/arm/mach-ep93xx/Kconfig"
339
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340source "arch/arm/mach-footbridge/Kconfig"
341
342source "arch/arm/mach-integrator/Kconfig"
343
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100344source "arch/arm/mach-iop32x/Kconfig"
345
346source "arch/arm/mach-iop33x/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
Dan Williams285f5fa2006-12-07 02:59:39 +0100348source "arch/arm/mach-iop13xx/Kconfig"
349
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350source "arch/arm/mach-ixp4xx/Kconfig"
351
352source "arch/arm/mach-ixp2000/Kconfig"
353
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100354source "arch/arm/mach-ixp23xx/Kconfig"
355
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356source "arch/arm/mach-pxa/Kconfig"
357
358source "arch/arm/mach-sa1100/Kconfig"
359
Tony Lindgrend48af152005-07-10 19:58:17 +0100360source "arch/arm/plat-omap/Kconfig"
361
362source "arch/arm/mach-omap1/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
Tony Lindgren1dbae812005-11-10 14:26:51 +0000364source "arch/arm/mach-omap2/Kconfig"
365
Ben Dooksa21765a2007-02-11 18:31:01 +0100366source "arch/arm/plat-s3c24xx/Kconfig"
367
368if ARCH_S3C2410
369source "arch/arm/mach-s3c2400/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370source "arch/arm/mach-s3c2410/Kconfig"
Ben Dooksa21765a2007-02-11 18:31:01 +0100371source "arch/arm/mach-s3c2412/Kconfig"
372source "arch/arm/mach-s3c2440/Kconfig"
373source "arch/arm/mach-s3c2442/Kconfig"
Ben Dookse4d06e32007-02-16 12:12:31 +0100374source "arch/arm/mach-s3c2443/Kconfig"
Ben Dooksa21765a2007-02-11 18:31:01 +0100375endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376
377source "arch/arm/mach-lh7a40x/Kconfig"
378
379source "arch/arm/mach-imx/Kconfig"
380
381source "arch/arm/mach-h720x/Kconfig"
382
383source "arch/arm/mach-versatile/Kconfig"
384
Bellido Nicolas038c5b62005-06-20 18:51:05 +0100385source "arch/arm/mach-aaec2000/Kconfig"
386
Catalin Marinas8ad68bb2005-10-31 14:25:02 +0000387source "arch/arm/mach-realview/Kconfig"
388
SAN People73a59c12006-01-09 17:05:41 +0000389source "arch/arm/mach-at91rm9200/Kconfig"
390
Sascha Hauerbb6d8c82006-06-19 15:27:53 +0100391source "arch/arm/mach-netx/Kconfig"
392
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393# Definitions to make life easier
394config ARCH_ACORN
395 bool
396
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100397config PLAT_IOP
398 bool
399
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400source arch/arm/mm/Kconfig
401
Lennert Buytenhekafe4b252006-12-03 18:51:14 +0100402config IWMMXT
403 bool "Enable iWMMXt support"
404 depends CPU_XSCALE || CPU_XSC3
405 default y if PXA27x
406 help
407 Enable support for iWMMXt context switching at run time if
408 running on a CPU that supports it.
409
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
411config XSCALE_PMU
412 bool
413 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
414 default y
415
Hyok S. Choi3b93e7b2006-06-22 11:48:56 +0100416if !MMU
417source "arch/arm/Kconfig-nommu"
418endif
419
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420endmenu
421
422source "arch/arm/common/Kconfig"
423
424config FORCE_MAX_ZONEORDER
425 int
426 depends on SA1111
427 default "9"
428
429menu "Bus support"
430
431config ARM_AMBA
432 bool
433
434config ISA
435 bool
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 help
437 Find out whether you have ISA slots on your motherboard. ISA is the
438 name of a bus system, i.e. the way the CPU talks to the other stuff
439 inside your box. Other bus systems are PCI, EISA, MicroChannel
440 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
441 newer boards don't support it. If you have ISA, say Y, otherwise N.
442
Russell King065909b2006-01-04 15:44:16 +0000443# Select ISA DMA controller support
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444config ISA_DMA
445 bool
Russell King065909b2006-01-04 15:44:16 +0000446 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
Russell King065909b2006-01-04 15:44:16 +0000448# Select ISA DMA interface
Al Viro5cae8412005-05-04 05:39:22 +0100449config ISA_DMA_API
450 bool
Al Viro5cae8412005-05-04 05:39:22 +0100451
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452config PCI
Milan Svoboda68939122006-06-25 22:12:12 +0100453 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 help
455 Find out whether you have a PCI motherboard. PCI is the name of a
456 bus system, i.e. the way the CPU talks to the other stuff inside
457 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
458 VESA. If you have PCI, say Y, otherwise N.
459
460 The PCI-HOWTO, available from
461 <http://www.tldp.org/docs.html#howto>, contains valuable
462 information about which PCI hardware does work under Linux and which
463 doesn't.
464
465# Select the host bridge type
466config PCI_HOST_VIA82C505
467 bool
468 depends on PCI && ARCH_SHARK
469 default y
470
471source "drivers/pci/Kconfig"
472
473source "drivers/pcmcia/Kconfig"
474
475endmenu
476
477menu "Kernel Features"
478
479config SMP
480 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
Russell Kingf6db4492005-11-07 21:30:21 +0000481 depends on EXPERIMENTAL && REALVIEW_MPCORE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 help
483 This enables support for systems with more than one CPU. If you have
484 a system with only one CPU, like most personal computers, say N. If
485 you have a system with more than one CPU, say Y.
486
487 If you say N here, the kernel will run on single and multiprocessor
488 machines, but will use only one CPU of a multiprocessor machine. If
489 you say Y here, the kernel will run on many, but not all, single
490 processor machines. On a single processor machine, the kernel will
491 run faster if you say N here.
492
Arthur Othieno12c62c22005-09-10 00:26:22 -0700493 See also the <file:Documentation/smp.txt>,
494 <file:Documentation/i386/IO-APIC.txt>,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
496 <http://www.linuxdoc.org/docs.html#howto>.
497
498 If you don't know what to do here, say N.
499
500config NR_CPUS
501 int "Maximum number of CPUs (2-32)"
502 range 2 32
503 depends on SMP
504 default "4"
505
Russell Kinga054a812005-11-02 22:24:33 +0000506config HOTPLUG_CPU
507 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
508 depends on SMP && HOTPLUG && EXPERIMENTAL
509 help
510 Say Y here to experiment with turning CPUs off and on. CPUs
511 can be controlled through /sys/devices/system/cpu.
512
Russell King37ee16a2005-11-08 19:08:05 +0000513config LOCAL_TIMERS
514 bool "Use local timer interrupts"
Russell King2a98beb2005-11-09 10:50:29 +0000515 depends on SMP && REALVIEW_MPCORE
Russell King37ee16a2005-11-08 19:08:05 +0000516 default y
517 help
518 Enable support for local timers on SMP platforms, rather then the
519 legacy IPI broadcast method. Local timers allows the system
520 accounting to be spread across the timer interval, preventing a
521 "thundering herd" at every timer tick.
522
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523config PREEMPT
524 bool "Preemptible Kernel (EXPERIMENTAL)"
525 depends on EXPERIMENTAL
526 help
527 This option reduces the latency of the kernel when reacting to
528 real-time or interactive events by allowing a low priority process to
529 be preempted even if it is in kernel mode executing a system call.
530 This allows applications to run more reliably even when the system is
531 under load.
532
533 Say Y here if you are building a kernel for a desktop, embedded
534 or real-time system. Say N if you are unsure.
535
Russell King8749af62005-06-25 19:39:45 +0100536config NO_IDLE_HZ
537 bool "Dynamic tick timer"
538 help
539 Select this option if you want to disable continuous timer ticks
540 and have them programmed to occur as required. This option saves
541 power as the system can remain in idle state for longer.
542
543 By default dynamic tick is disabled during the boot, and can be
544 manually enabled with:
545
546 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
547
548 Alternatively, if you want dynamic tick automatically enabled
549 during boot, pass "dyntick=enable" via the kernel command string.
550
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100551 Please note that dynamic tick may affect the accuracy of
552 timekeeping on some platforms depending on the implementation.
Nicolas Pitre569d2c32005-09-01 12:48:48 +0100553 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
554 to have accurate timekeeping with dynamic tick.
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100555
Russell Kingf8065812006-03-02 22:41:59 +0000556config HZ
557 int
558 default 128 if ARCH_L7200
559 default 200 if ARCH_EBSA110 || ARCH_S3C2410
Russell Kingbfe65702006-03-04 11:01:53 +0000560 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
Russell Kingf8065812006-03-02 22:41:59 +0000561 default 100
562
Nicolas Pitre704bdda02006-01-14 16:33:50 +0000563config AEABI
564 bool "Use the ARM EABI to compile the kernel"
565 help
566 This option allows for the kernel to be compiled using the latest
567 ARM ABI (aka EABI). This is only useful if you are using a user
568 space environment that is also compiled with EABI.
569
570 Since there are major incompatibilities between the legacy ABI and
571 EABI, especially with regard to structure member alignment, this
572 option also changes the kernel syscall calling convention to
573 disambiguate both ABIs and allow for backward compatibility support
574 (selected with CONFIG_OABI_COMPAT).
575
576 To use this you need GCC version 4.0.0 or later.
577
Nicolas Pitre6c90c872006-01-14 16:37:15 +0000578config OABI_COMPAT
Russell Kinga73a3ff2006-02-08 21:09:55 +0000579 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
Nicolas Pitre61c484d2006-02-08 21:09:08 +0000580 depends on AEABI && EXPERIMENTAL
Nicolas Pitre6c90c872006-01-14 16:37:15 +0000581 default y
582 help
583 This option preserves the old syscall interface along with the
584 new (ARM EABI) one. It also provides a compatibility layer to
585 intercept syscalls that have structure arguments which layout
586 in memory differs between the legacy ABI and the new ARM EABI
587 (only for non "thumb" binaries). This option adds a tiny
588 overhead to all syscalls and produces a slightly larger kernel.
589 If you know you'll be using only pure EABI user space then you
590 can say N here. If this option is not selected and you attempt
591 to execute a legacy ABI binary then the result will be
592 UNPREDICTABLE (in fact it can be predicted that it won't work
593 at all). If in doubt say Y.
594
Dave Hansen3f22ab22005-06-23 00:07:43 -0700595config ARCH_DISCONTIGMEM_ENABLE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 bool
Russell Kingf7e68bb2005-05-05 14:49:01 +0100597 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 help
599 Say Y to support efficient handling of discontiguous physical memory,
600 for architectures which are either NUMA (Non-Uniform Memory Access)
601 or have huge holes in the physical address space for other reasons.
602 See <file:Documentation/vm/numa> for more.
603
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700604config NODES_SHIFT
605 int
606 default "4" if ARCH_LH7A40X
607 default "2"
608 depends on NEED_MULTIPLE_NODES
609
Dave Hansen3f22ab22005-06-23 00:07:43 -0700610source "mm/Kconfig"
611
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612config LEDS
613 bool "Timer and CPU usage LEDs"
614 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
615 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
616 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
617 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
SAN People73a59c12006-01-09 17:05:41 +0000618 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
Andrew Victor58a0cd72006-12-01 14:51:13 +0100619 ARCH_AT91 || MACH_TRIZEPS4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 help
621 If you say Y here, the LEDs on your machine will be used
622 to provide useful information about your current system status.
623
624 If you are compiling a kernel for a NetWinder or EBSA-285, you will
625 be able to select which LEDs are active using the options below. If
626 you are compiling a kernel for the EBSA-110 or the LART however, the
627 red LED will simply flash regularly to indicate that the system is
628 still functional. It is safe to say Y here if you have a CATS
629 system, but the driver will do nothing.
630
631config LEDS_TIMER
632 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
633 MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
634 depends on LEDS
635 default y if ARCH_EBSA110
636 help
637 If you say Y here, one of the system LEDs (the green one on the
638 NetWinder, the amber one on the EBSA285, or the red one on the LART)
639 will flash regularly to indicate that the system is still
640 operational. This is mainly useful to kernel hackers who are
641 debugging unstable kernels.
642
643 The LART uses the same LED for both Timer LED and CPU usage LED
644 functions. You may choose to use both, but the Timer LED function
645 will overrule the CPU usage LED.
646
647config LEDS_CPU
648 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
649 !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
650 depends on LEDS
651 help
652 If you say Y here, the red LED will be used to give a good real
653 time indication of CPU usage, by lighting whenever the idle task
654 is not currently executing.
655
656 The LART uses the same LED for both Timer LED and CPU usage LED
657 functions. You may choose to use both, but the Timer LED function
658 will overrule the CPU usage LED.
659
660config ALIGNMENT_TRAP
661 bool
Hyok S. Choif12d0d72006-09-26 17:36:37 +0900662 depends on CPU_CP15_MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 default y if !ARCH_EBSA110
664 help
Matt LaPlante84eb8d02006-10-03 22:53:09 +0200665 ARM processors cannot fetch/store information which is not
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
667 address divisible by 4. On 32-bit ARM processors, these non-aligned
668 fetch/store instructions will be emulated in software if you say
669 here, which has a severe performance impact. This is necessary for
670 correct operation of some network protocols. With an IP-only
671 configuration it is safe to say N, otherwise say Y.
672
673endmenu
674
675menu "Boot options"
676
677# Compressed boot loader in ROM. Yes, we really want to ask about
678# TEXT and BSS so we preserve their values in the config files.
679config ZBOOT_ROM_TEXT
680 hex "Compressed ROM boot loader base address"
681 default "0"
682 help
683 The physical address at which the ROM-able zImage is to be
684 placed in the target. Platforms which normally make use of
685 ROM-able zImage formats normally set this to a suitable
686 value in their defconfig file.
687
688 If ZBOOT_ROM is not enabled, this has no effect.
689
690config ZBOOT_ROM_BSS
691 hex "Compressed ROM boot loader BSS address"
692 default "0"
693 help
Dan Fandrichf8c440b2006-09-20 23:28:51 +0100694 The base address of an area of read/write memory in the target
695 for the ROM-able zImage which must be available while the
696 decompressor is running. It must be large enough to hold the
697 entire decompressed kernel plus an additional 128 KiB.
698 Platforms which normally make use of ROM-able zImage formats
699 normally set this to a suitable value in their defconfig file.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
701 If ZBOOT_ROM is not enabled, this has no effect.
702
703config ZBOOT_ROM
704 bool "Compressed boot loader in ROM/flash"
705 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
706 help
707 Say Y here if you intend to execute your compressed kernel image
708 (zImage) directly from ROM or flash. If unsure, say N.
709
710config CMDLINE
711 string "Default kernel command string"
712 default ""
713 help
714 On some architectures (EBSA110 and CATS), there is currently no way
715 for the boot loader to pass arguments to the kernel. For these
716 architectures, you should supply some command-line options at build
717 time by entering them here. As a minimum, you should specify the
718 memory size and the root device (e.g., mem=64M root=/dev/nfs).
719
720config XIP_KERNEL
721 bool "Kernel Execute-In-Place from ROM"
722 depends on !ZBOOT_ROM
723 help
724 Execute-In-Place allows the kernel to run from non-volatile storage
725 directly addressable by the CPU, such as NOR flash. This saves RAM
726 space since the text section of the kernel is not loaded from flash
727 to RAM. Read-write sections, such as the data section and stack,
728 are still copied to RAM. The XIP kernel is not compressed since
729 it has to run directly from flash, so it will take more space to
730 store it. The flash address used to link the kernel object files,
731 and for storing it, is configuration dependent. Therefore, if you
732 say Y here, you must know the proper physical address where to
733 store the kernel image depending on your own flash memory usage.
734
735 Also note that the make target becomes "make xipImage" rather than
736 "make zImage" or "make Image". The final kernel binary to put in
737 ROM memory will be arch/arm/boot/xipImage.
738
739 If unsure, say N.
740
741config XIP_PHYS_ADDR
742 hex "XIP Kernel Physical Location"
743 depends on XIP_KERNEL
744 default "0x00080000"
745 help
746 This is the physical address in your flash memory the kernel will
747 be linked for and stored to. This address is dependent on your
748 own flash usage.
749
750endmenu
751
Pavel Pisa3c8cd0c2006-12-06 17:25:04 +0100752if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753
754menu "CPU Frequency scaling"
755
756source "drivers/cpufreq/Kconfig"
757
758config CPU_FREQ_SA1100
759 bool
Vincent Sanders07c6d482005-06-09 21:59:22 +0100760 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 -0700761 default y
762
763config CPU_FREQ_SA1110
764 bool
765 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
766 default y
767
768config CPU_FREQ_INTEGRATOR
769 tristate "CPUfreq driver for ARM Integrator CPUs"
770 depends on ARCH_INTEGRATOR && CPU_FREQ
771 default y
772 help
773 This enables the CPUfreq driver for ARM Integrator CPUs.
774
775 For details, take a look at <file:Documentation/cpu-freq>.
776
777 If in doubt, say Y.
778
Pavel Pisa3c8cd0c2006-12-06 17:25:04 +0100779config CPU_FREQ_IMX
780 tristate "CPUfreq driver for i.MX CPUs"
781 depends on ARCH_IMX && CPU_FREQ
782 default n
783 help
784 This enables the CPUfreq driver for i.MX CPUs.
785
786 If in doubt, say N.
787
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788endmenu
789
790endif
791
792menu "Floating point emulation"
793
794comment "At least one emulation must be selected"
795
796config FPE_NWFPE
797 bool "NWFPE math emulation"
Nicolas Pitre8993a442006-01-14 16:36:50 +0000798 depends on !AEABI || OABI_COMPAT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 ---help---
800 Say Y to include the NWFPE floating point emulator in the kernel.
801 This is necessary to run most binaries. Linux does not currently
802 support floating point hardware so you need to say Y here even if
803 your machine has an FPA or floating point co-processor podule.
804
805 You may say N here if you are going to load the Acorn FPEmulator
806 early in the bootup.
807
808config FPE_NWFPE_XP
809 bool "Support extended precision"
Lennert Buytenhekbedf1422005-11-07 21:12:08 +0000810 depends on FPE_NWFPE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 help
812 Say Y to include 80-bit support in the kernel floating-point
813 emulator. Otherwise, only 32 and 64-bit support is compiled in.
814 Note that gcc does not generate 80-bit operations by default,
815 so in most cases this option only enlarges the size of the
816 floating point emulator without any good reason.
817
818 You almost surely want to say N here.
819
820config FPE_FASTFPE
821 bool "FastFPE math emulation (EXPERIMENTAL)"
Nicolas Pitre8993a442006-01-14 16:36:50 +0000822 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 ---help---
824 Say Y here to include the FAST floating point emulator in the kernel.
825 This is an experimental much faster emulator which now also has full
826 precision for the mantissa. It does not support any exceptions.
827 It is very simple, and approximately 3-6 times faster than NWFPE.
828
829 It should be sufficient for most programs. It may be not suitable
830 for scientific calculations, but you have to check this for yourself.
831 If you do not feel you need a faster FP emulation you should better
832 choose NWFPE.
833
834config VFP
835 bool "VFP-format floating point maths"
836 depends on CPU_V6 || CPU_ARM926T
837 help
838 Say Y to include VFP support code in the kernel. This is needed
839 if your hardware includes a VFP unit.
840
841 Please see <file:Documentation/arm/VFP/release-notes.txt> for
842 release notes and additional status information.
843
844 Say N if your target does not have VFP hardware.
845
846endmenu
847
848menu "Userspace binary formats"
849
850source "fs/Kconfig.binfmt"
851
852config ARTHUR
853 tristate "RISC OS personality"
Nicolas Pitre704bdda02006-01-14 16:33:50 +0000854 depends on !AEABI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 help
856 Say Y here to include the kernel code necessary if you want to run
857 Acorn RISC OS/Arthur binaries under Linux. This code is still very
858 experimental; if this sounds frightening, say N and sleep in peace.
859 You can also say M here to compile this support as a module (which
860 will be called arthur).
861
862endmenu
863
864menu "Power management options"
865
Russell Kingeceab4a2005-11-15 11:31:41 +0000866source "kernel/power/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868config APM
869 tristate "Advanced Power Management Emulation"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 ---help---
871 APM is a BIOS specification for saving power using several different
872 techniques. This is mostly useful for battery powered laptops with
873 APM compliant BIOSes. If you say Y here, the system time will be
874 reset after a RESUME operation, the /proc/apm device will provide
875 battery status information, and user-space programs will receive
876 notification of APM "events" (e.g. battery status change).
877
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 In order to use APM, you will need supporting software. For location
879 and more information, read <file:Documentation/pm.txt> and the
880 Battery Powered Linux mini-HOWTO, available from
881 <http://www.tldp.org/docs.html#howto>.
882
883 This driver does not spin down disk drives (see the hdparm(8)
884 manpage ("man 8 hdparm") for that), and it doesn't turn off
885 VESA-compliant "green" monitors.
886
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 Generally, if you don't have a battery in your machine, there isn't
888 much point in using this driver and you should say N. If you get
889 random kernel OOPSes or reboots that don't seem to be related to
890 anything, try disabling/enabling this option (or disabling/enabling
891 APM in your BIOS).
892
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893endmenu
894
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700895source "net/Kconfig"
896
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897menu "Device Drivers"
898
899source "drivers/base/Kconfig"
900
Pavel Machekc35bf4a2005-11-12 20:25:25 +0000901source "drivers/connector/Kconfig"
902
Hyok S. Choif12d0d72006-09-26 17:36:37 +0900903if ALIGNMENT_TRAP || !CPU_CP15_MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904source "drivers/mtd/Kconfig"
905endif
906
907source "drivers/parport/Kconfig"
908
909source "drivers/pnp/Kconfig"
910
911source "drivers/block/Kconfig"
912
913source "drivers/acorn/block/Kconfig"
914
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100915if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
David Brownellbb011b82005-06-12 23:26:05 +0100916 || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100917 || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
918 || ARCH_IXP23XX
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919source "drivers/ide/Kconfig"
920endif
921
922source "drivers/scsi/Kconfig"
923
Martin Michlmayreb370f02006-11-17 00:14:35 +0100924source "drivers/ata/Kconfig"
925
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926source "drivers/md/Kconfig"
927
928source "drivers/message/fusion/Kconfig"
929
930source "drivers/ieee1394/Kconfig"
931
932source "drivers/message/i2o/Kconfig"
933
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700934source "drivers/net/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935
936source "drivers/isdn/Kconfig"
937
938# input before char - char/joystick depends on it. As does USB.
939
940source "drivers/input/Kconfig"
941
942source "drivers/char/Kconfig"
943
944source "drivers/i2c/Kconfig"
945
David Brownell8ae12a02006-01-08 13:34:19 -0800946source "drivers/spi/Kconfig"
947
Alessandro Zummo04916c02006-03-10 22:30:01 +0000948source "drivers/w1/Kconfig"
949
Jean Delvaread2f9312005-07-02 18:15:49 +0200950source "drivers/hwmon/Kconfig"
951
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952#source "drivers/l3/Kconfig"
953
954source "drivers/misc/Kconfig"
955
Russell Kinga4e137a2005-08-18 10:06:59 +0100956source "drivers/mfd/Kconfig"
957
Richard Purdiec72a1d62006-03-31 02:31:04 -0800958source "drivers/leds/Kconfig"
959
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960source "drivers/media/Kconfig"
961
962source "drivers/video/Kconfig"
963
964source "sound/Kconfig"
965
Sascha Hauerc2dade52006-12-12 10:32:42 +0100966source "drivers/hid/Kconfig"
967
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968source "drivers/usb/Kconfig"
969
970source "drivers/mmc/Kconfig"
971
Alessandro Zummo12b824f2006-03-27 01:16:35 -0800972source "drivers/rtc/Kconfig"
973
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974endmenu
975
976source "fs/Kconfig"
977
978source "arch/arm/oprofile/Kconfig"
979
980source "arch/arm/Kconfig.debug"
981
982source "security/Kconfig"
983
984source "crypto/Kconfig"
985
986source "lib/Kconfig"