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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#
2# For a description of the syntax of this configuration file,
3# see Documentation/kbuild/kconfig-language.txt.
4#
5
6mainmenu "Linux Kernel Configuration"
7
8config ARM
9 bool
10 default y
Alessandro Zummo12b824f2006-03-27 01:16:35 -080011 select RTC_LIB
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 help
13 The ARM series is a line of low-power-consumption RISC chip designs
Martin Michlmayrf6c89652006-02-08 21:09:07 +000014 licensed by ARM Ltd and targeted at embedded applications and
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
Martin Michlmayrf6c89652006-02-08 21:09:07 +000016 manufactured, but legacy ARM-based PC hardware remains popular in
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 Europe. There is an ARM Linux project with a web page at
18 <http://www.arm.linux.org.uk/>.
19
20config MMU
21 bool
22 default y
23
24config EISA
25 bool
26 ---help---
27 The Extended Industry Standard Architecture (EISA) bus was
28 developed as an open alternative to the IBM MicroChannel bus.
29
30 The EISA bus provided some of the features of the IBM MicroChannel
31 bus while maintaining backward compatibility with cards made for
32 the older ISA bus. The EISA bus saw limited use between 1988 and
33 1995 when it was made obsolete by the PCI bus.
34
35 Say Y here if you are building a kernel for an EISA-based machine.
36
37 Otherwise, say N.
38
39config SBUS
40 bool
41
42config MCA
43 bool
44 help
45 MicroChannel Architecture is found in some IBM PS/2 machines and
46 laptops. It is a bus system similar to PCI or ISA. See
47 <file:Documentation/mca.txt> (and especially the web page given
48 there) before attempting to build an MCA bus kernel.
49
Thomas Gleixner4a2581a2006-07-01 22:30:09 +010050config GENERIC_HARDIRQS
51 bool
52 default y
53
Russell King7ad1bcb2006-08-27 12:07:02 +010054config TRACE_IRQFLAGS_SUPPORT
55 bool
56 default y
57
Thomas Gleixner4a2581a2006-07-01 22:30:09 +010058config HARDIRQS_SW_RESEND
59 bool
60 default y
61
62config GENERIC_IRQ_PROBE
63 bool
64 default y
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066config RWSEM_GENERIC_SPINLOCK
67 bool
68 default y
69
70config RWSEM_XCHGADD_ALGORITHM
71 bool
72
Akinobu Mitab89c3b12006-03-26 01:39:19 -080073config GENERIC_HWEIGHT
74 bool
75 default y
76
Linus Torvalds1da177e2005-04-16 15:20:36 -070077config GENERIC_CALIBRATE_DELAY
78 bool
79 default y
80
81config GENERIC_BUST_SPINLOCK
82 bool
83
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +010084config ARCH_MAY_HAVE_PC_FDC
85 bool
86
Linus Torvalds1da177e2005-04-16 15:20:36 -070087config GENERIC_ISA_DMA
88 bool
89
Linus Torvalds1da177e2005-04-16 15:20:36 -070090config FIQ
91 bool
92
Al Viro034d2f52005-12-19 16:27:59 -050093config ARCH_MTD_XIP
94 bool
95
Hyok S. Choic760fc12006-03-27 15:18:50 +010096config VECTORS_BASE
97 hex
Hyok S. Choi6afd6fa2006-09-28 21:46:34 +090098 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
Hyok S. Choic760fc12006-03-27 15:18:50 +010099 default DRAM_BASE if REMAP_VECTORS_TO_RAM
100 default 0x00000000
101 help
102 The base address of exception vectors.
103
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104source "init/Kconfig"
105
106menu "System Type"
107
108choice
109 prompt "ARM system type"
Catalin Marinas6a0e2432006-03-07 14:42:27 +0000110 default ARCH_VERSATILE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100112config ARCH_AAEC2000
113 bool "Agilent AAEC-2000 based"
114 select ARM_AMBA
115 help
116 This enables support for systems based on the Agilent AAEC-2000
117
118config ARCH_INTEGRATOR
119 bool "ARM Ltd. Integrator family"
120 select ARM_AMBA
121 select ICST525
122 help
123 Support for ARM's Integrator platform.
124
125config ARCH_REALVIEW
126 bool "ARM Ltd. RealView family"
127 select ARM_AMBA
128 select ICST307
129 help
130 This enables support for ARM Ltd RealView boards.
131
132config ARCH_VERSATILE
133 bool "ARM Ltd. Versatile family"
134 select ARM_AMBA
135 select ARM_VIC
136 select ICST307
137 help
138 This enables support for ARM Ltd Versatile board.
139
Andrew Victor8fc5ffa2006-06-29 16:06:33 +0100140config ARCH_AT91
141 bool "Atmel AT91"
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100142 help
Andrew Victor8fc5ffa2006-06-29 16:06:33 +0100143 This enables support for systems based on the Atmel AT91RM9200
144 and AT91SAM9xxx processors.
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100145
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146config ARCH_CLPS7500
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100147 bool "Cirrus CL-PS7500FE"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 select TIMER_ACORN
Russell Kingf7e68bb2005-05-05 14:49:01 +0100149 select ISA
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000150 help
151 Support for the Cirrus Logic PS7500FE system-on-a-chip.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
153config ARCH_CLPS711X
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100154 bool "Cirrus Logic CLPS711x/EP721x-based"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000155 help
156 Support for Cirrus Logic 711x/721x based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
158config ARCH_CO285
159 bool "Co-EBSA285"
160 select FOOTBRIDGE
161 select FOOTBRIDGE_ADDIN
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000162 help
163 Support for Intel's EBSA285 companion chip.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
165config ARCH_EBSA110
166 bool "EBSA-110"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100167 select ISA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 help
169 This is an evaluation board for the StrongARM processor available
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000170 from Digital. It has limited hardware on-board, including an
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 Ethernet interface, two PCMCIA sockets, two serial ports and a
172 parallel port.
173
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000174config ARCH_EP93XX
175 bool "EP93xx-based"
176 select ARM_AMBA
177 select ARM_VIC
178 help
179 This enables support for the Cirrus EP93xx series of CPUs.
180
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181config ARCH_FOOTBRIDGE
182 bool "FootBridge"
183 select FOOTBRIDGE
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000184 help
185 Support for systems based on the DC21285 companion chip
186 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100188config ARCH_NETX
189 bool "Hilscher NetX based"
190 select ARM_VIC
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000191 help
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100192 This enables support for systems based on the Hilscher NetX Soc
193
194config ARCH_H720X
195 bool "Hynix HMS720x-based"
196 select ISA_DMA_API
197 help
198 This enables support for systems based on the Hynix HMS720x
199
200config ARCH_IMX
201 bool "IMX"
202 help
203 Support for Motorola's i.MX family of processors (MX1, MXL).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100205config ARCH_IOP32X
206 bool "IOP32x-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100207 depends on MMU
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100208 select PLAT_IOP
Russell Kingf7e68bb2005-05-05 14:49:01 +0100209 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000210 help
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100211 Support for Intel's 80219 and IOP32X (XScale) family of
212 processors.
213
214config ARCH_IOP33X
215 bool "IOP33x-based"
216 depends on MMU
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100217 select PLAT_IOP
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100218 select PCI
219 help
220 Support for Intel's IOP33X (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221
222config ARCH_IXP4XX
223 bool "IXP4xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100224 depends on MMU
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000225 help
226 Support for Intel's IXP4XX (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
228config ARCH_IXP2000
229 bool "IXP2400/2800-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100230 depends on MMU
Russell Kingf7e68bb2005-05-05 14:49:01 +0100231 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000232 help
233 Support for Intel's IXP2400/2800 (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100235config ARCH_IXP23XX
236 bool "IXP23XX-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100237 depends on MMU
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100238 select PCI
239 help
240 Support for Intel's IXP23xx (XScale) family of processors.
241
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242config ARCH_L7200
243 bool "LinkUp-L7200"
244 select FIQ
245 help
246 Say Y here if you intend to run this kernel on a LinkUp Systems
247 L7200 Software Development Board which uses an ARM720T processor.
248 Information on this board can be obtained at:
249
250 <http://www.linkupsys.com/>
251
252 If you have any questions or comments about the Linux kernel port
253 to this board, send e-mail to <sjhill@cotw.com>.
254
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100255config ARCH_PNX4008
256 bool "Philips Nexperia PNX4008 Mobile"
257 help
258 This enables support for Philips PNX4008 mobile platform.
259
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260config ARCH_PXA
261 bool "PXA2xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100262 depends on MMU
Al Viro034d2f52005-12-19 16:27:59 -0500263 select ARCH_MTD_XIP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000264 help
265 Support for Intel's PXA2XX processor line.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
267config ARCH_RPC
268 bool "RiscPC"
269 select ARCH_ACORN
270 select FIQ
271 select TIMER_ACORN
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100272 select ARCH_MAY_HAVE_PC_FDC
Russell King065909b2006-01-04 15:44:16 +0000273 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 help
275 On the Acorn Risc-PC, Linux can support the internal IDE disk and
276 CD-ROM interface, serial and parallel port, and the floppy drive.
277
278config ARCH_SA1100
279 bool "SA1100-based"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100280 select ISA
Russell King3cd9e192005-06-25 19:29:34 +0100281 select ARCH_DISCONTIGMEM_ENABLE
Al Viro034d2f52005-12-19 16:27:59 -0500282 select ARCH_MTD_XIP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000283 help
284 Support for StrongARM 11x0 based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
286config ARCH_S3C2410
Ben Dookscd701aa2006-06-26 15:12:58 +0100287 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 help
289 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
290 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000291 the Samsung SMDK2410 development board (and derivatives).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
293config ARCH_SHARK
294 bool "Shark"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100295 select ISA
296 select ISA_DMA
297 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000298 help
299 Support for the StrongARM based Digital DNARD machine, also known
300 as "Shark" (<http://www.shark-linux.de/shark.html>).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301
302config ARCH_LH7A40X
303 bool "Sharp LH7A40X"
304 help
305 Say Y here for systems based on one of the Sharp LH7A40X
306 System on a Chip processors. These CPUs include an ARM922T
307 core with a wide array of integrated devices for
308 hand-held and low-power applications.
309
310config ARCH_OMAP
311 bool "TI OMAP"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000312 help
313 Support for TI's OMAP platform (OMAP1 and OMAP2).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315endchoice
316
317source "arch/arm/mach-clps711x/Kconfig"
318
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000319source "arch/arm/mach-ep93xx/Kconfig"
320
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321source "arch/arm/mach-footbridge/Kconfig"
322
323source "arch/arm/mach-integrator/Kconfig"
324
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100325source "arch/arm/mach-iop32x/Kconfig"
326
327source "arch/arm/mach-iop33x/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
329source "arch/arm/mach-ixp4xx/Kconfig"
330
331source "arch/arm/mach-ixp2000/Kconfig"
332
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100333source "arch/arm/mach-ixp23xx/Kconfig"
334
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335source "arch/arm/mach-pxa/Kconfig"
336
337source "arch/arm/mach-sa1100/Kconfig"
338
Tony Lindgrend48af152005-07-10 19:58:17 +0100339source "arch/arm/plat-omap/Kconfig"
340
341source "arch/arm/mach-omap1/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
Tony Lindgren1dbae812005-11-10 14:26:51 +0000343source "arch/arm/mach-omap2/Kconfig"
344
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345source "arch/arm/mach-s3c2410/Kconfig"
346
347source "arch/arm/mach-lh7a40x/Kconfig"
348
349source "arch/arm/mach-imx/Kconfig"
350
351source "arch/arm/mach-h720x/Kconfig"
352
353source "arch/arm/mach-versatile/Kconfig"
354
Bellido Nicolas038c5b62005-06-20 18:51:05 +0100355source "arch/arm/mach-aaec2000/Kconfig"
356
Catalin Marinas8ad68bb2005-10-31 14:25:02 +0000357source "arch/arm/mach-realview/Kconfig"
358
SAN People73a59c12006-01-09 17:05:41 +0000359source "arch/arm/mach-at91rm9200/Kconfig"
360
Sascha Hauerbb6d8c82006-06-19 15:27:53 +0100361source "arch/arm/mach-netx/Kconfig"
362
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363# Definitions to make life easier
364config ARCH_ACORN
365 bool
366
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100367config PLAT_IOP
368 bool
369
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370source arch/arm/mm/Kconfig
371
372# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
373config XSCALE_PMU
374 bool
375 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
376 default y
377
Hyok S. Choi3b93e7b2006-06-22 11:48:56 +0100378if !MMU
379source "arch/arm/Kconfig-nommu"
380endif
381
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382endmenu
383
384source "arch/arm/common/Kconfig"
385
386config FORCE_MAX_ZONEORDER
387 int
388 depends on SA1111
389 default "9"
390
391menu "Bus support"
392
393config ARM_AMBA
394 bool
395
396config ISA
397 bool
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 help
399 Find out whether you have ISA slots on your motherboard. ISA is the
400 name of a bus system, i.e. the way the CPU talks to the other stuff
401 inside your box. Other bus systems are PCI, EISA, MicroChannel
402 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
403 newer boards don't support it. If you have ISA, say Y, otherwise N.
404
Russell King065909b2006-01-04 15:44:16 +0000405# Select ISA DMA controller support
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406config ISA_DMA
407 bool
Russell King065909b2006-01-04 15:44:16 +0000408 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
Russell King065909b2006-01-04 15:44:16 +0000410# Select ISA DMA interface
Al Viro5cae8412005-05-04 05:39:22 +0100411config ISA_DMA_API
412 bool
Al Viro5cae8412005-05-04 05:39:22 +0100413
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414config PCI
Milan Svoboda68939122006-06-25 22:12:12 +0100415 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 help
417 Find out whether you have a PCI motherboard. PCI is the name of a
418 bus system, i.e. the way the CPU talks to the other stuff inside
419 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
420 VESA. If you have PCI, say Y, otherwise N.
421
422 The PCI-HOWTO, available from
423 <http://www.tldp.org/docs.html#howto>, contains valuable
424 information about which PCI hardware does work under Linux and which
425 doesn't.
426
427# Select the host bridge type
428config PCI_HOST_VIA82C505
429 bool
430 depends on PCI && ARCH_SHARK
431 default y
432
433source "drivers/pci/Kconfig"
434
435source "drivers/pcmcia/Kconfig"
436
437endmenu
438
439menu "Kernel Features"
440
441config SMP
442 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
Russell Kingf6db4492005-11-07 21:30:21 +0000443 depends on EXPERIMENTAL && REALVIEW_MPCORE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 help
445 This enables support for systems with more than one CPU. If you have
446 a system with only one CPU, like most personal computers, say N. If
447 you have a system with more than one CPU, say Y.
448
449 If you say N here, the kernel will run on single and multiprocessor
450 machines, but will use only one CPU of a multiprocessor machine. If
451 you say Y here, the kernel will run on many, but not all, single
452 processor machines. On a single processor machine, the kernel will
453 run faster if you say N here.
454
Arthur Othieno12c62c22005-09-10 00:26:22 -0700455 See also the <file:Documentation/smp.txt>,
456 <file:Documentation/i386/IO-APIC.txt>,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
458 <http://www.linuxdoc.org/docs.html#howto>.
459
460 If you don't know what to do here, say N.
461
462config NR_CPUS
463 int "Maximum number of CPUs (2-32)"
464 range 2 32
465 depends on SMP
466 default "4"
467
Russell Kinga054a812005-11-02 22:24:33 +0000468config HOTPLUG_CPU
469 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
470 depends on SMP && HOTPLUG && EXPERIMENTAL
471 help
472 Say Y here to experiment with turning CPUs off and on. CPUs
473 can be controlled through /sys/devices/system/cpu.
474
Russell King37ee16a2005-11-08 19:08:05 +0000475config LOCAL_TIMERS
476 bool "Use local timer interrupts"
Russell King2a98beb2005-11-09 10:50:29 +0000477 depends on SMP && REALVIEW_MPCORE
Russell King37ee16a2005-11-08 19:08:05 +0000478 default y
479 help
480 Enable support for local timers on SMP platforms, rather then the
481 legacy IPI broadcast method. Local timers allows the system
482 accounting to be spread across the timer interval, preventing a
483 "thundering herd" at every timer tick.
484
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485config PREEMPT
486 bool "Preemptible Kernel (EXPERIMENTAL)"
487 depends on EXPERIMENTAL
488 help
489 This option reduces the latency of the kernel when reacting to
490 real-time or interactive events by allowing a low priority process to
491 be preempted even if it is in kernel mode executing a system call.
492 This allows applications to run more reliably even when the system is
493 under load.
494
495 Say Y here if you are building a kernel for a desktop, embedded
496 or real-time system. Say N if you are unsure.
497
Russell King8749af62005-06-25 19:39:45 +0100498config NO_IDLE_HZ
499 bool "Dynamic tick timer"
500 help
501 Select this option if you want to disable continuous timer ticks
502 and have them programmed to occur as required. This option saves
503 power as the system can remain in idle state for longer.
504
505 By default dynamic tick is disabled during the boot, and can be
506 manually enabled with:
507
508 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
509
510 Alternatively, if you want dynamic tick automatically enabled
511 during boot, pass "dyntick=enable" via the kernel command string.
512
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100513 Please note that dynamic tick may affect the accuracy of
514 timekeeping on some platforms depending on the implementation.
Nicolas Pitre569d2c32005-09-01 12:48:48 +0100515 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
516 to have accurate timekeeping with dynamic tick.
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100517
Russell Kingf8065812006-03-02 22:41:59 +0000518config HZ
519 int
520 default 128 if ARCH_L7200
521 default 200 if ARCH_EBSA110 || ARCH_S3C2410
Russell Kingbfe65702006-03-04 11:01:53 +0000522 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
Russell Kingf8065812006-03-02 22:41:59 +0000523 default 100
524
Nicolas Pitre704bdda02006-01-14 16:33:50 +0000525config AEABI
526 bool "Use the ARM EABI to compile the kernel"
527 help
528 This option allows for the kernel to be compiled using the latest
529 ARM ABI (aka EABI). This is only useful if you are using a user
530 space environment that is also compiled with EABI.
531
532 Since there are major incompatibilities between the legacy ABI and
533 EABI, especially with regard to structure member alignment, this
534 option also changes the kernel syscall calling convention to
535 disambiguate both ABIs and allow for backward compatibility support
536 (selected with CONFIG_OABI_COMPAT).
537
538 To use this you need GCC version 4.0.0 or later.
539
Nicolas Pitre6c90c872006-01-14 16:37:15 +0000540config OABI_COMPAT
Russell Kinga73a3ff2006-02-08 21:09:55 +0000541 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
Nicolas Pitre61c484d2006-02-08 21:09:08 +0000542 depends on AEABI && EXPERIMENTAL
Nicolas Pitre6c90c872006-01-14 16:37:15 +0000543 default y
544 help
545 This option preserves the old syscall interface along with the
546 new (ARM EABI) one. It also provides a compatibility layer to
547 intercept syscalls that have structure arguments which layout
548 in memory differs between the legacy ABI and the new ARM EABI
549 (only for non "thumb" binaries). This option adds a tiny
550 overhead to all syscalls and produces a slightly larger kernel.
551 If you know you'll be using only pure EABI user space then you
552 can say N here. If this option is not selected and you attempt
553 to execute a legacy ABI binary then the result will be
554 UNPREDICTABLE (in fact it can be predicted that it won't work
555 at all). If in doubt say Y.
556
Dave Hansen3f22ab22005-06-23 00:07:43 -0700557config ARCH_DISCONTIGMEM_ENABLE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 bool
Russell Kingf7e68bb2005-05-05 14:49:01 +0100559 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 help
561 Say Y to support efficient handling of discontiguous physical memory,
562 for architectures which are either NUMA (Non-Uniform Memory Access)
563 or have huge holes in the physical address space for other reasons.
564 See <file:Documentation/vm/numa> for more.
565
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700566config NODES_SHIFT
567 int
568 default "4" if ARCH_LH7A40X
569 default "2"
570 depends on NEED_MULTIPLE_NODES
571
Dave Hansen3f22ab22005-06-23 00:07:43 -0700572source "mm/Kconfig"
573
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574config LEDS
575 bool "Timer and CPU usage LEDs"
576 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
577 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
578 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
579 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
SAN People73a59c12006-01-09 17:05:41 +0000580 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
Jürgen Schindele326764a2006-06-29 16:01:43 +0100581 ARCH_AT91RM9200 || MACH_TRIZEPS4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 help
583 If you say Y here, the LEDs on your machine will be used
584 to provide useful information about your current system status.
585
586 If you are compiling a kernel for a NetWinder or EBSA-285, you will
587 be able to select which LEDs are active using the options below. If
588 you are compiling a kernel for the EBSA-110 or the LART however, the
589 red LED will simply flash regularly to indicate that the system is
590 still functional. It is safe to say Y here if you have a CATS
591 system, but the driver will do nothing.
592
593config LEDS_TIMER
594 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
595 MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
596 depends on LEDS
597 default y if ARCH_EBSA110
598 help
599 If you say Y here, one of the system LEDs (the green one on the
600 NetWinder, the amber one on the EBSA285, or the red one on the LART)
601 will flash regularly to indicate that the system is still
602 operational. This is mainly useful to kernel hackers who are
603 debugging unstable kernels.
604
605 The LART uses the same LED for both Timer LED and CPU usage LED
606 functions. You may choose to use both, but the Timer LED function
607 will overrule the CPU usage LED.
608
609config LEDS_CPU
610 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
611 !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
612 depends on LEDS
613 help
614 If you say Y here, the red LED will be used to give a good real
615 time indication of CPU usage, by lighting whenever the idle task
616 is not currently executing.
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 ALIGNMENT_TRAP
623 bool
Hyok S. Choif12d0d72006-09-26 17:36:37 +0900624 depends on CPU_CP15_MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 default y if !ARCH_EBSA110
626 help
627 ARM processors can not fetch/store information which is not
628 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
629 address divisible by 4. On 32-bit ARM processors, these non-aligned
630 fetch/store instructions will be emulated in software if you say
631 here, which has a severe performance impact. This is necessary for
632 correct operation of some network protocols. With an IP-only
633 configuration it is safe to say N, otherwise say Y.
634
635endmenu
636
637menu "Boot options"
638
639# Compressed boot loader in ROM. Yes, we really want to ask about
640# TEXT and BSS so we preserve their values in the config files.
641config ZBOOT_ROM_TEXT
642 hex "Compressed ROM boot loader base address"
643 default "0"
644 help
645 The physical address at which the ROM-able zImage is to be
646 placed in the target. Platforms which normally make use of
647 ROM-able zImage formats normally set this to a suitable
648 value in their defconfig file.
649
650 If ZBOOT_ROM is not enabled, this has no effect.
651
652config ZBOOT_ROM_BSS
653 hex "Compressed ROM boot loader BSS address"
654 default "0"
655 help
Dan Fandrichf8c440b2006-09-20 23:28:51 +0100656 The base address of an area of read/write memory in the target
657 for the ROM-able zImage which must be available while the
658 decompressor is running. It must be large enough to hold the
659 entire decompressed kernel plus an additional 128 KiB.
660 Platforms which normally make use of ROM-able zImage formats
661 normally set this to a suitable value in their defconfig file.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662
663 If ZBOOT_ROM is not enabled, this has no effect.
664
665config ZBOOT_ROM
666 bool "Compressed boot loader in ROM/flash"
667 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
668 help
669 Say Y here if you intend to execute your compressed kernel image
670 (zImage) directly from ROM or flash. If unsure, say N.
671
672config CMDLINE
673 string "Default kernel command string"
674 default ""
675 help
676 On some architectures (EBSA110 and CATS), there is currently no way
677 for the boot loader to pass arguments to the kernel. For these
678 architectures, you should supply some command-line options at build
679 time by entering them here. As a minimum, you should specify the
680 memory size and the root device (e.g., mem=64M root=/dev/nfs).
681
682config XIP_KERNEL
683 bool "Kernel Execute-In-Place from ROM"
684 depends on !ZBOOT_ROM
685 help
686 Execute-In-Place allows the kernel to run from non-volatile storage
687 directly addressable by the CPU, such as NOR flash. This saves RAM
688 space since the text section of the kernel is not loaded from flash
689 to RAM. Read-write sections, such as the data section and stack,
690 are still copied to RAM. The XIP kernel is not compressed since
691 it has to run directly from flash, so it will take more space to
692 store it. The flash address used to link the kernel object files,
693 and for storing it, is configuration dependent. Therefore, if you
694 say Y here, you must know the proper physical address where to
695 store the kernel image depending on your own flash memory usage.
696
697 Also note that the make target becomes "make xipImage" rather than
698 "make zImage" or "make Image". The final kernel binary to put in
699 ROM memory will be arch/arm/boot/xipImage.
700
701 If unsure, say N.
702
703config XIP_PHYS_ADDR
704 hex "XIP Kernel Physical Location"
705 depends on XIP_KERNEL
706 default "0x00080000"
707 help
708 This is the physical address in your flash memory the kernel will
709 be linked for and stored to. This address is dependent on your
710 own flash usage.
711
712endmenu
713
Tony Lindgrena7ca9d22006-06-26 16:16:17 -0700714if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715
716menu "CPU Frequency scaling"
717
718source "drivers/cpufreq/Kconfig"
719
720config CPU_FREQ_SA1100
721 bool
Vincent Sanders07c6d482005-06-09 21:59:22 +0100722 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 -0700723 default y
724
725config CPU_FREQ_SA1110
726 bool
727 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
728 default y
729
730config CPU_FREQ_INTEGRATOR
731 tristate "CPUfreq driver for ARM Integrator CPUs"
732 depends on ARCH_INTEGRATOR && CPU_FREQ
733 default y
734 help
735 This enables the CPUfreq driver for ARM Integrator CPUs.
736
737 For details, take a look at <file:Documentation/cpu-freq>.
738
739 If in doubt, say Y.
740
741endmenu
742
743endif
744
745menu "Floating point emulation"
746
747comment "At least one emulation must be selected"
748
749config FPE_NWFPE
750 bool "NWFPE math emulation"
Nicolas Pitre8993a442006-01-14 16:36:50 +0000751 depends on !AEABI || OABI_COMPAT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 ---help---
753 Say Y to include the NWFPE floating point emulator in the kernel.
754 This is necessary to run most binaries. Linux does not currently
755 support floating point hardware so you need to say Y here even if
756 your machine has an FPA or floating point co-processor podule.
757
758 You may say N here if you are going to load the Acorn FPEmulator
759 early in the bootup.
760
761config FPE_NWFPE_XP
762 bool "Support extended precision"
Lennert Buytenhekbedf1422005-11-07 21:12:08 +0000763 depends on FPE_NWFPE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 help
765 Say Y to include 80-bit support in the kernel floating-point
766 emulator. Otherwise, only 32 and 64-bit support is compiled in.
767 Note that gcc does not generate 80-bit operations by default,
768 so in most cases this option only enlarges the size of the
769 floating point emulator without any good reason.
770
771 You almost surely want to say N here.
772
773config FPE_FASTFPE
774 bool "FastFPE math emulation (EXPERIMENTAL)"
Nicolas Pitre8993a442006-01-14 16:36:50 +0000775 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 ---help---
777 Say Y here to include the FAST floating point emulator in the kernel.
778 This is an experimental much faster emulator which now also has full
779 precision for the mantissa. It does not support any exceptions.
780 It is very simple, and approximately 3-6 times faster than NWFPE.
781
782 It should be sufficient for most programs. It may be not suitable
783 for scientific calculations, but you have to check this for yourself.
784 If you do not feel you need a faster FP emulation you should better
785 choose NWFPE.
786
787config VFP
788 bool "VFP-format floating point maths"
789 depends on CPU_V6 || CPU_ARM926T
790 help
791 Say Y to include VFP support code in the kernel. This is needed
792 if your hardware includes a VFP unit.
793
794 Please see <file:Documentation/arm/VFP/release-notes.txt> for
795 release notes and additional status information.
796
797 Say N if your target does not have VFP hardware.
798
799endmenu
800
801menu "Userspace binary formats"
802
803source "fs/Kconfig.binfmt"
804
805config ARTHUR
806 tristate "RISC OS personality"
Nicolas Pitre704bdda02006-01-14 16:33:50 +0000807 depends on !AEABI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 help
809 Say Y here to include the kernel code necessary if you want to run
810 Acorn RISC OS/Arthur binaries under Linux. This code is still very
811 experimental; if this sounds frightening, say N and sleep in peace.
812 You can also say M here to compile this support as a module (which
813 will be called arthur).
814
815endmenu
816
817menu "Power management options"
818
Russell Kingeceab4a2005-11-15 11:31:41 +0000819source "kernel/power/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821config APM
822 tristate "Advanced Power Management Emulation"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 ---help---
824 APM is a BIOS specification for saving power using several different
825 techniques. This is mostly useful for battery powered laptops with
826 APM compliant BIOSes. If you say Y here, the system time will be
827 reset after a RESUME operation, the /proc/apm device will provide
828 battery status information, and user-space programs will receive
829 notification of APM "events" (e.g. battery status change).
830
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 In order to use APM, you will need supporting software. For location
832 and more information, read <file:Documentation/pm.txt> and the
833 Battery Powered Linux mini-HOWTO, available from
834 <http://www.tldp.org/docs.html#howto>.
835
836 This driver does not spin down disk drives (see the hdparm(8)
837 manpage ("man 8 hdparm") for that), and it doesn't turn off
838 VESA-compliant "green" monitors.
839
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 Generally, if you don't have a battery in your machine, there isn't
841 much point in using this driver and you should say N. If you get
842 random kernel OOPSes or reboots that don't seem to be related to
843 anything, try disabling/enabling this option (or disabling/enabling
844 APM in your BIOS).
845
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846endmenu
847
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700848source "net/Kconfig"
849
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850menu "Device Drivers"
851
852source "drivers/base/Kconfig"
853
Pavel Machekc35bf4a2005-11-12 20:25:25 +0000854source "drivers/connector/Kconfig"
855
Hyok S. Choif12d0d72006-09-26 17:36:37 +0900856if ALIGNMENT_TRAP || !CPU_CP15_MMU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857source "drivers/mtd/Kconfig"
858endif
859
860source "drivers/parport/Kconfig"
861
862source "drivers/pnp/Kconfig"
863
864source "drivers/block/Kconfig"
865
866source "drivers/acorn/block/Kconfig"
867
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100868if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
David Brownellbb011b82005-06-12 23:26:05 +0100869 || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100870 || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
871 || ARCH_IXP23XX
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872source "drivers/ide/Kconfig"
873endif
874
875source "drivers/scsi/Kconfig"
876
877source "drivers/md/Kconfig"
878
879source "drivers/message/fusion/Kconfig"
880
881source "drivers/ieee1394/Kconfig"
882
883source "drivers/message/i2o/Kconfig"
884
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700885source "drivers/net/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886
887source "drivers/isdn/Kconfig"
888
889# input before char - char/joystick depends on it. As does USB.
890
891source "drivers/input/Kconfig"
892
893source "drivers/char/Kconfig"
894
895source "drivers/i2c/Kconfig"
896
David Brownell8ae12a02006-01-08 13:34:19 -0800897source "drivers/spi/Kconfig"
898
Alessandro Zummo04916c02006-03-10 22:30:01 +0000899source "drivers/w1/Kconfig"
900
Jean Delvaread2f9312005-07-02 18:15:49 +0200901source "drivers/hwmon/Kconfig"
902
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903#source "drivers/l3/Kconfig"
904
905source "drivers/misc/Kconfig"
906
Russell Kinga4e137a2005-08-18 10:06:59 +0100907source "drivers/mfd/Kconfig"
908
Richard Purdiec72a1d62006-03-31 02:31:04 -0800909source "drivers/leds/Kconfig"
910
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911source "drivers/media/Kconfig"
912
913source "drivers/video/Kconfig"
914
915source "sound/Kconfig"
916
917source "drivers/usb/Kconfig"
918
919source "drivers/mmc/Kconfig"
920
Alessandro Zummo12b824f2006-03-27 01:16:35 -0800921source "drivers/rtc/Kconfig"
922
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923endmenu
924
925source "fs/Kconfig"
926
927source "arch/arm/oprofile/Kconfig"
928
929source "arch/arm/Kconfig.debug"
930
931source "security/Kconfig"
932
933source "crypto/Kconfig"
934
935source "lib/Kconfig"