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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
Akinobu Mitab89c3b12006-03-26 01:39:19 -080077config GENERIC_HWEIGHT
78 bool
79 default y
80
Linus Torvalds1da177e2005-04-16 15:20:36 -070081config GENERIC_CALIBRATE_DELAY
82 bool
83 default y
84
85config GENERIC_BUST_SPINLOCK
86 bool
87
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +010088config ARCH_MAY_HAVE_PC_FDC
89 bool
90
Linus Torvalds1da177e2005-04-16 15:20:36 -070091config GENERIC_ISA_DMA
92 bool
93
Linus Torvalds1da177e2005-04-16 15:20:36 -070094config FIQ
95 bool
96
Al Viro034d2f52005-12-19 16:27:59 -050097config ARCH_MTD_XIP
98 bool
99
Hyok S. Choic760fc12006-03-27 15:18:50 +0100100config VECTORS_BASE
101 hex
Hyok S. Choi6afd6fa2006-09-28 21:46:34 +0900102 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
Hyok S. Choic760fc12006-03-27 15:18:50 +0100103 default DRAM_BASE if REMAP_VECTORS_TO_RAM
104 default 0x00000000
105 help
106 The base address of exception vectors.
107
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108source "init/Kconfig"
109
110menu "System Type"
111
112choice
113 prompt "ARM system type"
Catalin Marinas6a0e2432006-03-07 14:42:27 +0000114 default ARCH_VERSATILE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100116config ARCH_AAEC2000
117 bool "Agilent AAEC-2000 based"
118 select ARM_AMBA
119 help
120 This enables support for systems based on the Agilent AAEC-2000
121
122config ARCH_INTEGRATOR
123 bool "ARM Ltd. Integrator family"
124 select ARM_AMBA
125 select ICST525
126 help
127 Support for ARM's Integrator platform.
128
129config ARCH_REALVIEW
130 bool "ARM Ltd. RealView family"
131 select ARM_AMBA
132 select ICST307
133 help
134 This enables support for ARM Ltd RealView boards.
135
136config ARCH_VERSATILE
137 bool "ARM Ltd. Versatile family"
138 select ARM_AMBA
139 select ARM_VIC
140 select ICST307
141 help
142 This enables support for ARM Ltd Versatile board.
143
Andrew Victor8fc5ffa2006-06-29 16:06:33 +0100144config ARCH_AT91
145 bool "Atmel AT91"
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100146 help
Andrew Victor8fc5ffa2006-06-29 16:06:33 +0100147 This enables support for systems based on the Atmel AT91RM9200
148 and AT91SAM9xxx processors.
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100149
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150config ARCH_CLPS7500
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100151 bool "Cirrus CL-PS7500FE"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 select TIMER_ACORN
Russell Kingf7e68bb2005-05-05 14:49:01 +0100153 select ISA
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000154 help
155 Support for the Cirrus Logic PS7500FE system-on-a-chip.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
157config ARCH_CLPS711X
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100158 bool "Cirrus Logic CLPS711x/EP721x-based"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000159 help
160 Support for Cirrus Logic 711x/721x based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
162config ARCH_CO285
163 bool "Co-EBSA285"
164 select FOOTBRIDGE
165 select FOOTBRIDGE_ADDIN
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000166 help
167 Support for Intel's EBSA285 companion chip.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
169config ARCH_EBSA110
170 bool "EBSA-110"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100171 select ISA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 help
173 This is an evaluation board for the StrongARM processor available
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000174 from Digital. It has limited hardware on-board, including an
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 Ethernet interface, two PCMCIA sockets, two serial ports and a
176 parallel port.
177
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000178config ARCH_EP93XX
179 bool "EP93xx-based"
180 select ARM_AMBA
181 select ARM_VIC
182 help
183 This enables support for the Cirrus EP93xx series of CPUs.
184
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185config ARCH_FOOTBRIDGE
186 bool "FootBridge"
187 select FOOTBRIDGE
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000188 help
189 Support for systems based on the DC21285 companion chip
190 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100192config ARCH_NETX
193 bool "Hilscher NetX based"
194 select ARM_VIC
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000195 help
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100196 This enables support for systems based on the Hilscher NetX Soc
197
198config ARCH_H720X
199 bool "Hynix HMS720x-based"
200 select ISA_DMA_API
201 help
202 This enables support for systems based on the Hynix HMS720x
203
204config ARCH_IMX
205 bool "IMX"
206 help
207 Support for Motorola's i.MX family of processors (MX1, MXL).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100209config ARCH_IOP32X
210 bool "IOP32x-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100211 depends on MMU
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100212 select PLAT_IOP
Russell Kingf7e68bb2005-05-05 14:49:01 +0100213 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000214 help
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100215 Support for Intel's 80219 and IOP32X (XScale) family of
216 processors.
217
218config ARCH_IOP33X
219 bool "IOP33x-based"
220 depends on MMU
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100221 select PLAT_IOP
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100222 select PCI
223 help
224 Support for Intel's IOP33X (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
Dan Williams285f5fa2006-12-07 02:59:39 +0100226config ARCH_IOP13XX
227 bool "IOP13xx-based"
228 select PCI
229 help
230 Support for Intel's IOP13XX (XScale) family of processors.
231
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232config ARCH_IXP4XX
233 bool "IXP4xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100234 depends on MMU
Kevin Hilman84904d02006-09-22 00:58:57 +0100235 select GENERIC_TIME
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000236 help
237 Support for Intel's IXP4XX (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
239config ARCH_IXP2000
240 bool "IXP2400/2800-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100241 depends on MMU
Russell Kingf7e68bb2005-05-05 14:49:01 +0100242 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000243 help
244 Support for Intel's IXP2400/2800 (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100246config ARCH_IXP23XX
247 bool "IXP23XX-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100248 depends on MMU
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100249 select PCI
250 help
251 Support for Intel's IXP23xx (XScale) family of processors.
252
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253config ARCH_L7200
254 bool "LinkUp-L7200"
255 select FIQ
256 help
257 Say Y here if you intend to run this kernel on a LinkUp Systems
258 L7200 Software Development Board which uses an ARM720T processor.
259 Information on this board can be obtained at:
260
261 <http://www.linkupsys.com/>
262
263 If you have any questions or comments about the Linux kernel port
264 to this board, send e-mail to <sjhill@cotw.com>.
265
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100266config ARCH_PNX4008
267 bool "Philips Nexperia PNX4008 Mobile"
268 help
269 This enables support for Philips PNX4008 mobile platform.
270
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271config ARCH_PXA
272 bool "PXA2xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100273 depends on MMU
Al Viro034d2f52005-12-19 16:27:59 -0500274 select ARCH_MTD_XIP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000275 help
276 Support for Intel's PXA2XX processor line.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
278config ARCH_RPC
279 bool "RiscPC"
280 select ARCH_ACORN
281 select FIQ
282 select TIMER_ACORN
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100283 select ARCH_MAY_HAVE_PC_FDC
Russell King065909b2006-01-04 15:44:16 +0000284 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 help
286 On the Acorn Risc-PC, Linux can support the internal IDE disk and
287 CD-ROM interface, serial and parallel port, and the floppy drive.
288
289config ARCH_SA1100
290 bool "SA1100-based"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100291 select ISA
Russell King3cd9e192005-06-25 19:29:34 +0100292 select ARCH_DISCONTIGMEM_ENABLE
Al Viro034d2f52005-12-19 16:27:59 -0500293 select ARCH_MTD_XIP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000294 help
295 Support for StrongARM 11x0 based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
297config ARCH_S3C2410
Ben Dookscd701aa2006-06-26 15:12:58 +0100298 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 help
300 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
301 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000302 the Samsung SMDK2410 development board (and derivatives).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
304config ARCH_SHARK
305 bool "Shark"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100306 select ISA
307 select ISA_DMA
308 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000309 help
310 Support for the StrongARM based Digital DNARD machine, also known
311 as "Shark" (<http://www.shark-linux.de/shark.html>).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
313config ARCH_LH7A40X
314 bool "Sharp LH7A40X"
315 help
316 Say Y here for systems based on one of the Sharp LH7A40X
317 System on a Chip processors. These CPUs include an ARM922T
318 core with a wide array of integrated devices for
319 hand-held and low-power applications.
320
321config ARCH_OMAP
322 bool "TI OMAP"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000323 help
324 Support for TI's OMAP platform (OMAP1 and OMAP2).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326endchoice
327
328source "arch/arm/mach-clps711x/Kconfig"
329
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000330source "arch/arm/mach-ep93xx/Kconfig"
331
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332source "arch/arm/mach-footbridge/Kconfig"
333
334source "arch/arm/mach-integrator/Kconfig"
335
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100336source "arch/arm/mach-iop32x/Kconfig"
337
338source "arch/arm/mach-iop33x/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
Dan Williams285f5fa2006-12-07 02:59:39 +0100340source "arch/arm/mach-iop13xx/Kconfig"
341
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342source "arch/arm/mach-ixp4xx/Kconfig"
343
344source "arch/arm/mach-ixp2000/Kconfig"
345
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100346source "arch/arm/mach-ixp23xx/Kconfig"
347
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348source "arch/arm/mach-pxa/Kconfig"
349
350source "arch/arm/mach-sa1100/Kconfig"
351
Tony Lindgrend48af152005-07-10 19:58:17 +0100352source "arch/arm/plat-omap/Kconfig"
353
354source "arch/arm/mach-omap1/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355
Tony Lindgren1dbae812005-11-10 14:26:51 +0000356source "arch/arm/mach-omap2/Kconfig"
357
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358source "arch/arm/mach-s3c2410/Kconfig"
359
360source "arch/arm/mach-lh7a40x/Kconfig"
361
362source "arch/arm/mach-imx/Kconfig"
363
364source "arch/arm/mach-h720x/Kconfig"
365
366source "arch/arm/mach-versatile/Kconfig"
367
Bellido Nicolas038c5b62005-06-20 18:51:05 +0100368source "arch/arm/mach-aaec2000/Kconfig"
369
Catalin Marinas8ad68bb2005-10-31 14:25:02 +0000370source "arch/arm/mach-realview/Kconfig"
371
SAN People73a59c12006-01-09 17:05:41 +0000372source "arch/arm/mach-at91rm9200/Kconfig"
373
Sascha Hauerbb6d8c82006-06-19 15:27:53 +0100374source "arch/arm/mach-netx/Kconfig"
375
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376# Definitions to make life easier
377config ARCH_ACORN
378 bool
379
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100380config PLAT_IOP
381 bool
382
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383source arch/arm/mm/Kconfig
384
385# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
386config XSCALE_PMU
387 bool
388 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
389 default y
390
Hyok S. Choi3b93e7b2006-06-22 11:48:56 +0100391if !MMU
392source "arch/arm/Kconfig-nommu"
393endif
394
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395endmenu
396
397source "arch/arm/common/Kconfig"
398
399config FORCE_MAX_ZONEORDER
400 int
401 depends on SA1111
402 default "9"
403
404menu "Bus support"
405
406config ARM_AMBA
407 bool
408
409config ISA
410 bool
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 help
412 Find out whether you have ISA slots on your motherboard. ISA is the
413 name of a bus system, i.e. the way the CPU talks to the other stuff
414 inside your box. Other bus systems are PCI, EISA, MicroChannel
415 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
416 newer boards don't support it. If you have ISA, say Y, otherwise N.
417
Russell King065909b2006-01-04 15:44:16 +0000418# Select ISA DMA controller support
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419config ISA_DMA
420 bool
Russell King065909b2006-01-04 15:44:16 +0000421 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422
Russell King065909b2006-01-04 15:44:16 +0000423# Select ISA DMA interface
Al Viro5cae8412005-05-04 05:39:22 +0100424config ISA_DMA_API
425 bool
Al Viro5cae8412005-05-04 05:39:22 +0100426
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427config PCI
Milan Svoboda68939122006-06-25 22:12:12 +0100428 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 help
430 Find out whether you have a PCI motherboard. PCI is the name of a
431 bus system, i.e. the way the CPU talks to the other stuff inside
432 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
433 VESA. If you have PCI, say Y, otherwise N.
434
435 The PCI-HOWTO, available from
436 <http://www.tldp.org/docs.html#howto>, contains valuable
437 information about which PCI hardware does work under Linux and which
438 doesn't.
439
440# Select the host bridge type
441config PCI_HOST_VIA82C505
442 bool
443 depends on PCI && ARCH_SHARK
444 default y
445
446source "drivers/pci/Kconfig"
447
448source "drivers/pcmcia/Kconfig"
449
450endmenu
451
452menu "Kernel Features"
453
454config SMP
455 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
Russell Kingf6db4492005-11-07 21:30:21 +0000456 depends on EXPERIMENTAL && REALVIEW_MPCORE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 help
458 This enables support for systems with more than one CPU. If you have
459 a system with only one CPU, like most personal computers, say N. If
460 you have a system with more than one CPU, say Y.
461
462 If you say N here, the kernel will run on single and multiprocessor
463 machines, but will use only one CPU of a multiprocessor machine. If
464 you say Y here, the kernel will run on many, but not all, single
465 processor machines. On a single processor machine, the kernel will
466 run faster if you say N here.
467
Arthur Othieno12c62c22005-09-10 00:26:22 -0700468 See also the <file:Documentation/smp.txt>,
469 <file:Documentation/i386/IO-APIC.txt>,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
471 <http://www.linuxdoc.org/docs.html#howto>.
472
473 If you don't know what to do here, say N.
474
475config NR_CPUS
476 int "Maximum number of CPUs (2-32)"
477 range 2 32
478 depends on SMP
479 default "4"
480
Russell Kinga054a812005-11-02 22:24:33 +0000481config HOTPLUG_CPU
482 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
483 depends on SMP && HOTPLUG && EXPERIMENTAL
484 help
485 Say Y here to experiment with turning CPUs off and on. CPUs
486 can be controlled through /sys/devices/system/cpu.
487
Russell King37ee16a2005-11-08 19:08:05 +0000488config LOCAL_TIMERS
489 bool "Use local timer interrupts"
Russell King2a98beb2005-11-09 10:50:29 +0000490 depends on SMP && REALVIEW_MPCORE
Russell King37ee16a2005-11-08 19:08:05 +0000491 default y
492 help
493 Enable support for local timers on SMP platforms, rather then the
494 legacy IPI broadcast method. Local timers allows the system
495 accounting to be spread across the timer interval, preventing a
496 "thundering herd" at every timer tick.
497
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498config PREEMPT
499 bool "Preemptible Kernel (EXPERIMENTAL)"
500 depends on EXPERIMENTAL
501 help
502 This option reduces the latency of the kernel when reacting to
503 real-time or interactive events by allowing a low priority process to
504 be preempted even if it is in kernel mode executing a system call.
505 This allows applications to run more reliably even when the system is
506 under load.
507
508 Say Y here if you are building a kernel for a desktop, embedded
509 or real-time system. Say N if you are unsure.
510
Russell King8749af62005-06-25 19:39:45 +0100511config NO_IDLE_HZ
512 bool "Dynamic tick timer"
513 help
514 Select this option if you want to disable continuous timer ticks
515 and have them programmed to occur as required. This option saves
516 power as the system can remain in idle state for longer.
517
518 By default dynamic tick is disabled during the boot, and can be
519 manually enabled with:
520
521 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
522
523 Alternatively, if you want dynamic tick automatically enabled
524 during boot, pass "dyntick=enable" via the kernel command string.
525
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100526 Please note that dynamic tick may affect the accuracy of
527 timekeeping on some platforms depending on the implementation.
Nicolas Pitre569d2c32005-09-01 12:48:48 +0100528 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
529 to have accurate timekeeping with dynamic tick.
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100530
Russell Kingf8065812006-03-02 22:41:59 +0000531config HZ
532 int
533 default 128 if ARCH_L7200
534 default 200 if ARCH_EBSA110 || ARCH_S3C2410
Russell Kingbfe65702006-03-04 11:01:53 +0000535 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
Russell Kingf8065812006-03-02 22:41:59 +0000536 default 100
537
Nicolas Pitre704bdda02006-01-14 16:33:50 +0000538config AEABI
539 bool "Use the ARM EABI to compile the kernel"
540 help
541 This option allows for the kernel to be compiled using the latest
542 ARM ABI (aka EABI). This is only useful if you are using a user
543 space environment that is also compiled with EABI.
544
545 Since there are major incompatibilities between the legacy ABI and
546 EABI, especially with regard to structure member alignment, this
547 option also changes the kernel syscall calling convention to
548 disambiguate both ABIs and allow for backward compatibility support
549 (selected with CONFIG_OABI_COMPAT).
550
551 To use this you need GCC version 4.0.0 or later.
552
Nicolas Pitre6c90c872006-01-14 16:37:15 +0000553config OABI_COMPAT
Russell Kinga73a3ff2006-02-08 21:09:55 +0000554 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
Nicolas Pitre61c484d2006-02-08 21:09:08 +0000555 depends on AEABI && EXPERIMENTAL
Nicolas Pitre6c90c872006-01-14 16:37:15 +0000556 default y
557 help
558 This option preserves the old syscall interface along with the
559 new (ARM EABI) one. It also provides a compatibility layer to
560 intercept syscalls that have structure arguments which layout
561 in memory differs between the legacy ABI and the new ARM EABI
562 (only for non "thumb" binaries). This option adds a tiny
563 overhead to all syscalls and produces a slightly larger kernel.
564 If you know you'll be using only pure EABI user space then you
565 can say N here. If this option is not selected and you attempt
566 to execute a legacy ABI binary then the result will be
567 UNPREDICTABLE (in fact it can be predicted that it won't work
568 at all). If in doubt say Y.
569
Dave Hansen3f22ab22005-06-23 00:07:43 -0700570config ARCH_DISCONTIGMEM_ENABLE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 bool
Russell Kingf7e68bb2005-05-05 14:49:01 +0100572 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 help
574 Say Y to support efficient handling of discontiguous physical memory,
575 for architectures which are either NUMA (Non-Uniform Memory Access)
576 or have huge holes in the physical address space for other reasons.
577 See <file:Documentation/vm/numa> for more.
578
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700579config NODES_SHIFT
580 int
581 default "4" if ARCH_LH7A40X
582 default "2"
583 depends on NEED_MULTIPLE_NODES
584
Dave Hansen3f22ab22005-06-23 00:07:43 -0700585source "mm/Kconfig"
586
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587config LEDS
588 bool "Timer and CPU usage LEDs"
589 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
590 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
591 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
592 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
SAN People73a59c12006-01-09 17:05:41 +0000593 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
Jürgen Schindele326764a2006-06-29 16:01:43 +0100594 ARCH_AT91RM9200 || MACH_TRIZEPS4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 help
596 If you say Y here, the LEDs on your machine will be used
597 to provide useful information about your current system status.
598
599 If you are compiling a kernel for a NetWinder or EBSA-285, you will
600 be able to select which LEDs are active using the options below. If
601 you are compiling a kernel for the EBSA-110 or the LART however, the
602 red LED will simply flash regularly to indicate that the system is
603 still functional. It is safe to say Y here if you have a CATS
604 system, but the driver will do nothing.
605
606config LEDS_TIMER
607 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
608 MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
609 depends on LEDS
610 default y if ARCH_EBSA110
611 help
612 If you say Y here, one of the system LEDs (the green one on the
613 NetWinder, the amber one on the EBSA285, or the red one on the LART)
614 will flash regularly to indicate that the system is still
615 operational. This is mainly useful to kernel hackers who are
616 debugging unstable kernels.
617
618 The LART uses the same LED for both Timer LED and CPU usage LED
619 functions. You may choose to use both, but the Timer LED function
620 will overrule the CPU usage LED.
621
622config LEDS_CPU
623 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
624 !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
625 depends on LEDS
626 help
627 If you say Y here, the red LED will be used to give a good real
628 time indication of CPU usage, by lighting whenever the idle task
629 is not currently executing.
630
631 The LART uses the same LED for both Timer LED and CPU usage LED
632 functions. You may choose to use both, but the Timer LED function
633 will overrule the CPU usage LED.
634
635config ALIGNMENT_TRAP
636 bool
Hyok S. Choif12d0d72006-09-26 17:36:37 +0900637 depends on CPU_CP15_MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 default y if !ARCH_EBSA110
639 help
Matt LaPlante84eb8d02006-10-03 22:53:09 +0200640 ARM processors cannot fetch/store information which is not
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
642 address divisible by 4. On 32-bit ARM processors, these non-aligned
643 fetch/store instructions will be emulated in software if you say
644 here, which has a severe performance impact. This is necessary for
645 correct operation of some network protocols. With an IP-only
646 configuration it is safe to say N, otherwise say Y.
647
648endmenu
649
650menu "Boot options"
651
652# Compressed boot loader in ROM. Yes, we really want to ask about
653# TEXT and BSS so we preserve their values in the config files.
654config ZBOOT_ROM_TEXT
655 hex "Compressed ROM boot loader base address"
656 default "0"
657 help
658 The physical address at which the ROM-able zImage is to be
659 placed in the target. Platforms which normally make use of
660 ROM-able zImage formats normally set this to a suitable
661 value in their defconfig file.
662
663 If ZBOOT_ROM is not enabled, this has no effect.
664
665config ZBOOT_ROM_BSS
666 hex "Compressed ROM boot loader BSS address"
667 default "0"
668 help
Dan Fandrichf8c440b2006-09-20 23:28:51 +0100669 The base address of an area of read/write memory in the target
670 for the ROM-able zImage which must be available while the
671 decompressor is running. It must be large enough to hold the
672 entire decompressed kernel plus an additional 128 KiB.
673 Platforms which normally make use of ROM-able zImage formats
674 normally set this to a suitable value in their defconfig file.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675
676 If ZBOOT_ROM is not enabled, this has no effect.
677
678config ZBOOT_ROM
679 bool "Compressed boot loader in ROM/flash"
680 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
681 help
682 Say Y here if you intend to execute your compressed kernel image
683 (zImage) directly from ROM or flash. If unsure, say N.
684
685config CMDLINE
686 string "Default kernel command string"
687 default ""
688 help
689 On some architectures (EBSA110 and CATS), there is currently no way
690 for the boot loader to pass arguments to the kernel. For these
691 architectures, you should supply some command-line options at build
692 time by entering them here. As a minimum, you should specify the
693 memory size and the root device (e.g., mem=64M root=/dev/nfs).
694
695config XIP_KERNEL
696 bool "Kernel Execute-In-Place from ROM"
697 depends on !ZBOOT_ROM
698 help
699 Execute-In-Place allows the kernel to run from non-volatile storage
700 directly addressable by the CPU, such as NOR flash. This saves RAM
701 space since the text section of the kernel is not loaded from flash
702 to RAM. Read-write sections, such as the data section and stack,
703 are still copied to RAM. The XIP kernel is not compressed since
704 it has to run directly from flash, so it will take more space to
705 store it. The flash address used to link the kernel object files,
706 and for storing it, is configuration dependent. Therefore, if you
707 say Y here, you must know the proper physical address where to
708 store the kernel image depending on your own flash memory usage.
709
710 Also note that the make target becomes "make xipImage" rather than
711 "make zImage" or "make Image". The final kernel binary to put in
712 ROM memory will be arch/arm/boot/xipImage.
713
714 If unsure, say N.
715
716config XIP_PHYS_ADDR
717 hex "XIP Kernel Physical Location"
718 depends on XIP_KERNEL
719 default "0x00080000"
720 help
721 This is the physical address in your flash memory the kernel will
722 be linked for and stored to. This address is dependent on your
723 own flash usage.
724
725endmenu
726
Tony Lindgrena7ca9d22006-06-26 16:16:17 -0700727if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728
729menu "CPU Frequency scaling"
730
731source "drivers/cpufreq/Kconfig"
732
733config CPU_FREQ_SA1100
734 bool
Vincent Sanders07c6d482005-06-09 21:59:22 +0100735 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 -0700736 default y
737
738config CPU_FREQ_SA1110
739 bool
740 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
741 default y
742
743config CPU_FREQ_INTEGRATOR
744 tristate "CPUfreq driver for ARM Integrator CPUs"
745 depends on ARCH_INTEGRATOR && CPU_FREQ
746 default y
747 help
748 This enables the CPUfreq driver for ARM Integrator CPUs.
749
750 For details, take a look at <file:Documentation/cpu-freq>.
751
752 If in doubt, say Y.
753
754endmenu
755
756endif
757
758menu "Floating point emulation"
759
760comment "At least one emulation must be selected"
761
762config FPE_NWFPE
763 bool "NWFPE math emulation"
Nicolas Pitre8993a442006-01-14 16:36:50 +0000764 depends on !AEABI || OABI_COMPAT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 ---help---
766 Say Y to include the NWFPE floating point emulator in the kernel.
767 This is necessary to run most binaries. Linux does not currently
768 support floating point hardware so you need to say Y here even if
769 your machine has an FPA or floating point co-processor podule.
770
771 You may say N here if you are going to load the Acorn FPEmulator
772 early in the bootup.
773
774config FPE_NWFPE_XP
775 bool "Support extended precision"
Lennert Buytenhekbedf1422005-11-07 21:12:08 +0000776 depends on FPE_NWFPE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 help
778 Say Y to include 80-bit support in the kernel floating-point
779 emulator. Otherwise, only 32 and 64-bit support is compiled in.
780 Note that gcc does not generate 80-bit operations by default,
781 so in most cases this option only enlarges the size of the
782 floating point emulator without any good reason.
783
784 You almost surely want to say N here.
785
786config FPE_FASTFPE
787 bool "FastFPE math emulation (EXPERIMENTAL)"
Nicolas Pitre8993a442006-01-14 16:36:50 +0000788 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 ---help---
790 Say Y here to include the FAST floating point emulator in the kernel.
791 This is an experimental much faster emulator which now also has full
792 precision for the mantissa. It does not support any exceptions.
793 It is very simple, and approximately 3-6 times faster than NWFPE.
794
795 It should be sufficient for most programs. It may be not suitable
796 for scientific calculations, but you have to check this for yourself.
797 If you do not feel you need a faster FP emulation you should better
798 choose NWFPE.
799
800config VFP
801 bool "VFP-format floating point maths"
802 depends on CPU_V6 || CPU_ARM926T
803 help
804 Say Y to include VFP support code in the kernel. This is needed
805 if your hardware includes a VFP unit.
806
807 Please see <file:Documentation/arm/VFP/release-notes.txt> for
808 release notes and additional status information.
809
810 Say N if your target does not have VFP hardware.
811
812endmenu
813
814menu "Userspace binary formats"
815
816source "fs/Kconfig.binfmt"
817
818config ARTHUR
819 tristate "RISC OS personality"
Nicolas Pitre704bdda02006-01-14 16:33:50 +0000820 depends on !AEABI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 help
822 Say Y here to include the kernel code necessary if you want to run
823 Acorn RISC OS/Arthur binaries under Linux. This code is still very
824 experimental; if this sounds frightening, say N and sleep in peace.
825 You can also say M here to compile this support as a module (which
826 will be called arthur).
827
828endmenu
829
830menu "Power management options"
831
Russell Kingeceab4a2005-11-15 11:31:41 +0000832source "kernel/power/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834config APM
835 tristate "Advanced Power Management Emulation"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 ---help---
837 APM is a BIOS specification for saving power using several different
838 techniques. This is mostly useful for battery powered laptops with
839 APM compliant BIOSes. If you say Y here, the system time will be
840 reset after a RESUME operation, the /proc/apm device will provide
841 battery status information, and user-space programs will receive
842 notification of APM "events" (e.g. battery status change).
843
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 In order to use APM, you will need supporting software. For location
845 and more information, read <file:Documentation/pm.txt> and the
846 Battery Powered Linux mini-HOWTO, available from
847 <http://www.tldp.org/docs.html#howto>.
848
849 This driver does not spin down disk drives (see the hdparm(8)
850 manpage ("man 8 hdparm") for that), and it doesn't turn off
851 VESA-compliant "green" monitors.
852
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 Generally, if you don't have a battery in your machine, there isn't
854 much point in using this driver and you should say N. If you get
855 random kernel OOPSes or reboots that don't seem to be related to
856 anything, try disabling/enabling this option (or disabling/enabling
857 APM in your BIOS).
858
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859endmenu
860
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700861source "net/Kconfig"
862
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863menu "Device Drivers"
864
865source "drivers/base/Kconfig"
866
Pavel Machekc35bf4a2005-11-12 20:25:25 +0000867source "drivers/connector/Kconfig"
868
Hyok S. Choif12d0d72006-09-26 17:36:37 +0900869if ALIGNMENT_TRAP || !CPU_CP15_MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870source "drivers/mtd/Kconfig"
871endif
872
873source "drivers/parport/Kconfig"
874
875source "drivers/pnp/Kconfig"
876
877source "drivers/block/Kconfig"
878
879source "drivers/acorn/block/Kconfig"
880
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100881if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
David Brownellbb011b82005-06-12 23:26:05 +0100882 || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100883 || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
884 || ARCH_IXP23XX
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885source "drivers/ide/Kconfig"
886endif
887
888source "drivers/scsi/Kconfig"
889
Martin Michlmayreb370f02006-11-17 00:14:35 +0100890source "drivers/ata/Kconfig"
891
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892source "drivers/md/Kconfig"
893
894source "drivers/message/fusion/Kconfig"
895
896source "drivers/ieee1394/Kconfig"
897
898source "drivers/message/i2o/Kconfig"
899
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700900source "drivers/net/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901
902source "drivers/isdn/Kconfig"
903
904# input before char - char/joystick depends on it. As does USB.
905
906source "drivers/input/Kconfig"
907
908source "drivers/char/Kconfig"
909
910source "drivers/i2c/Kconfig"
911
David Brownell8ae12a02006-01-08 13:34:19 -0800912source "drivers/spi/Kconfig"
913
Alessandro Zummo04916c02006-03-10 22:30:01 +0000914source "drivers/w1/Kconfig"
915
Jean Delvaread2f9312005-07-02 18:15:49 +0200916source "drivers/hwmon/Kconfig"
917
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918#source "drivers/l3/Kconfig"
919
920source "drivers/misc/Kconfig"
921
Russell Kinga4e137a2005-08-18 10:06:59 +0100922source "drivers/mfd/Kconfig"
923
Richard Purdiec72a1d62006-03-31 02:31:04 -0800924source "drivers/leds/Kconfig"
925
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926source "drivers/media/Kconfig"
927
928source "drivers/video/Kconfig"
929
930source "sound/Kconfig"
931
932source "drivers/usb/Kconfig"
933
934source "drivers/mmc/Kconfig"
935
Alessandro Zummo12b824f2006-03-27 01:16:35 -0800936source "drivers/rtc/Kconfig"
937
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938endmenu
939
940source "fs/Kconfig"
941
942source "arch/arm/oprofile/Kconfig"
943
944source "arch/arm/Kconfig.debug"
945
946source "security/Kconfig"
947
948source "crypto/Kconfig"
949
950source "lib/Kconfig"