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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
102 default 0xffff0000 if MMU
103 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
226config ARCH_IXP4XX
227 bool "IXP4xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100228 depends on MMU
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000229 help
230 Support for Intel's IXP4XX (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
232config ARCH_IXP2000
233 bool "IXP2400/2800-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100234 depends on MMU
Russell Kingf7e68bb2005-05-05 14:49:01 +0100235 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000236 help
237 Support for Intel's IXP2400/2800 (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100239config ARCH_IXP23XX
240 bool "IXP23XX-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100241 depends on MMU
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100242 select PCI
243 help
244 Support for Intel's IXP23xx (XScale) family of processors.
245
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246config ARCH_L7200
247 bool "LinkUp-L7200"
248 select FIQ
249 help
250 Say Y here if you intend to run this kernel on a LinkUp Systems
251 L7200 Software Development Board which uses an ARM720T processor.
252 Information on this board can be obtained at:
253
254 <http://www.linkupsys.com/>
255
256 If you have any questions or comments about the Linux kernel port
257 to this board, send e-mail to <sjhill@cotw.com>.
258
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100259config ARCH_PNX4008
260 bool "Philips Nexperia PNX4008 Mobile"
261 help
262 This enables support for Philips PNX4008 mobile platform.
263
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264config ARCH_PXA
265 bool "PXA2xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100266 depends on MMU
Al Viro034d2f52005-12-19 16:27:59 -0500267 select ARCH_MTD_XIP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000268 help
269 Support for Intel's PXA2XX processor line.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270
271config ARCH_RPC
272 bool "RiscPC"
273 select ARCH_ACORN
274 select FIQ
275 select TIMER_ACORN
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100276 select ARCH_MAY_HAVE_PC_FDC
Russell King065909b2006-01-04 15:44:16 +0000277 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 help
279 On the Acorn Risc-PC, Linux can support the internal IDE disk and
280 CD-ROM interface, serial and parallel port, and the floppy drive.
281
282config ARCH_SA1100
283 bool "SA1100-based"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100284 select ISA
Russell King3cd9e192005-06-25 19:29:34 +0100285 select ARCH_DISCONTIGMEM_ENABLE
Al Viro034d2f52005-12-19 16:27:59 -0500286 select ARCH_MTD_XIP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000287 help
288 Support for StrongARM 11x0 based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
290config ARCH_S3C2410
Ben Dookscd701aa2006-06-26 15:12:58 +0100291 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 help
293 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
294 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000295 the Samsung SMDK2410 development board (and derivatives).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
297config ARCH_SHARK
298 bool "Shark"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100299 select ISA
300 select ISA_DMA
301 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000302 help
303 Support for the StrongARM based Digital DNARD machine, also known
304 as "Shark" (<http://www.shark-linux.de/shark.html>).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305
306config ARCH_LH7A40X
307 bool "Sharp LH7A40X"
308 help
309 Say Y here for systems based on one of the Sharp LH7A40X
310 System on a Chip processors. These CPUs include an ARM922T
311 core with a wide array of integrated devices for
312 hand-held and low-power applications.
313
314config ARCH_OMAP
315 bool "TI OMAP"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000316 help
317 Support for TI's OMAP platform (OMAP1 and OMAP2).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319endchoice
320
321source "arch/arm/mach-clps711x/Kconfig"
322
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000323source "arch/arm/mach-ep93xx/Kconfig"
324
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325source "arch/arm/mach-footbridge/Kconfig"
326
327source "arch/arm/mach-integrator/Kconfig"
328
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100329source "arch/arm/mach-iop32x/Kconfig"
330
331source "arch/arm/mach-iop33x/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332
333source "arch/arm/mach-ixp4xx/Kconfig"
334
335source "arch/arm/mach-ixp2000/Kconfig"
336
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100337source "arch/arm/mach-ixp23xx/Kconfig"
338
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339source "arch/arm/mach-pxa/Kconfig"
340
341source "arch/arm/mach-sa1100/Kconfig"
342
Tony Lindgrend48af152005-07-10 19:58:17 +0100343source "arch/arm/plat-omap/Kconfig"
344
345source "arch/arm/mach-omap1/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
Tony Lindgren1dbae812005-11-10 14:26:51 +0000347source "arch/arm/mach-omap2/Kconfig"
348
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349source "arch/arm/mach-s3c2410/Kconfig"
350
351source "arch/arm/mach-lh7a40x/Kconfig"
352
353source "arch/arm/mach-imx/Kconfig"
354
355source "arch/arm/mach-h720x/Kconfig"
356
357source "arch/arm/mach-versatile/Kconfig"
358
Bellido Nicolas038c5b62005-06-20 18:51:05 +0100359source "arch/arm/mach-aaec2000/Kconfig"
360
Catalin Marinas8ad68bb2005-10-31 14:25:02 +0000361source "arch/arm/mach-realview/Kconfig"
362
SAN People73a59c12006-01-09 17:05:41 +0000363source "arch/arm/mach-at91rm9200/Kconfig"
364
Sascha Hauerbb6d8c82006-06-19 15:27:53 +0100365source "arch/arm/mach-netx/Kconfig"
366
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367# Definitions to make life easier
368config ARCH_ACORN
369 bool
370
Lennert Buytenhek7ae1f7e2006-09-18 23:12:53 +0100371config PLAT_IOP
372 bool
373
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374source arch/arm/mm/Kconfig
375
376# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
377config XSCALE_PMU
378 bool
379 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
380 default y
381
Hyok S. Choi3b93e7b2006-06-22 11:48:56 +0100382if !MMU
383source "arch/arm/Kconfig-nommu"
384endif
385
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386endmenu
387
388source "arch/arm/common/Kconfig"
389
390config FORCE_MAX_ZONEORDER
391 int
392 depends on SA1111
393 default "9"
394
395menu "Bus support"
396
397config ARM_AMBA
398 bool
399
400config ISA
401 bool
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 help
403 Find out whether you have ISA slots on your motherboard. ISA is the
404 name of a bus system, i.e. the way the CPU talks to the other stuff
405 inside your box. Other bus systems are PCI, EISA, MicroChannel
406 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
407 newer boards don't support it. If you have ISA, say Y, otherwise N.
408
Russell King065909b2006-01-04 15:44:16 +0000409# Select ISA DMA controller support
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410config ISA_DMA
411 bool
Russell King065909b2006-01-04 15:44:16 +0000412 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
Russell King065909b2006-01-04 15:44:16 +0000414# Select ISA DMA interface
Al Viro5cae8412005-05-04 05:39:22 +0100415config ISA_DMA_API
416 bool
Al Viro5cae8412005-05-04 05:39:22 +0100417
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418config PCI
Milan Svoboda68939122006-06-25 22:12:12 +0100419 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 help
421 Find out whether you have a PCI motherboard. PCI is the name of a
422 bus system, i.e. the way the CPU talks to the other stuff inside
423 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
424 VESA. If you have PCI, say Y, otherwise N.
425
426 The PCI-HOWTO, available from
427 <http://www.tldp.org/docs.html#howto>, contains valuable
428 information about which PCI hardware does work under Linux and which
429 doesn't.
430
431# Select the host bridge type
432config PCI_HOST_VIA82C505
433 bool
434 depends on PCI && ARCH_SHARK
435 default y
436
437source "drivers/pci/Kconfig"
438
439source "drivers/pcmcia/Kconfig"
440
441endmenu
442
443menu "Kernel Features"
444
445config SMP
446 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
Russell Kingf6db4492005-11-07 21:30:21 +0000447 depends on EXPERIMENTAL && REALVIEW_MPCORE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 help
449 This enables support for systems with more than one CPU. If you have
450 a system with only one CPU, like most personal computers, say N. If
451 you have a system with more than one CPU, say Y.
452
453 If you say N here, the kernel will run on single and multiprocessor
454 machines, but will use only one CPU of a multiprocessor machine. If
455 you say Y here, the kernel will run on many, but not all, single
456 processor machines. On a single processor machine, the kernel will
457 run faster if you say N here.
458
Arthur Othieno12c62c22005-09-10 00:26:22 -0700459 See also the <file:Documentation/smp.txt>,
460 <file:Documentation/i386/IO-APIC.txt>,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
462 <http://www.linuxdoc.org/docs.html#howto>.
463
464 If you don't know what to do here, say N.
465
466config NR_CPUS
467 int "Maximum number of CPUs (2-32)"
468 range 2 32
469 depends on SMP
470 default "4"
471
Russell Kinga054a812005-11-02 22:24:33 +0000472config HOTPLUG_CPU
473 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
474 depends on SMP && HOTPLUG && EXPERIMENTAL
475 help
476 Say Y here to experiment with turning CPUs off and on. CPUs
477 can be controlled through /sys/devices/system/cpu.
478
Russell King37ee16a2005-11-08 19:08:05 +0000479config LOCAL_TIMERS
480 bool "Use local timer interrupts"
Russell King2a98beb2005-11-09 10:50:29 +0000481 depends on SMP && REALVIEW_MPCORE
Russell King37ee16a2005-11-08 19:08:05 +0000482 default y
483 help
484 Enable support for local timers on SMP platforms, rather then the
485 legacy IPI broadcast method. Local timers allows the system
486 accounting to be spread across the timer interval, preventing a
487 "thundering herd" at every timer tick.
488
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489config PREEMPT
490 bool "Preemptible Kernel (EXPERIMENTAL)"
491 depends on EXPERIMENTAL
492 help
493 This option reduces the latency of the kernel when reacting to
494 real-time or interactive events by allowing a low priority process to
495 be preempted even if it is in kernel mode executing a system call.
496 This allows applications to run more reliably even when the system is
497 under load.
498
499 Say Y here if you are building a kernel for a desktop, embedded
500 or real-time system. Say N if you are unsure.
501
Russell King8749af62005-06-25 19:39:45 +0100502config NO_IDLE_HZ
503 bool "Dynamic tick timer"
504 help
505 Select this option if you want to disable continuous timer ticks
506 and have them programmed to occur as required. This option saves
507 power as the system can remain in idle state for longer.
508
509 By default dynamic tick is disabled during the boot, and can be
510 manually enabled with:
511
512 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
513
514 Alternatively, if you want dynamic tick automatically enabled
515 during boot, pass "dyntick=enable" via the kernel command string.
516
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100517 Please note that dynamic tick may affect the accuracy of
518 timekeeping on some platforms depending on the implementation.
Nicolas Pitre569d2c32005-09-01 12:48:48 +0100519 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
520 to have accurate timekeeping with dynamic tick.
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100521
Russell Kingf8065812006-03-02 22:41:59 +0000522config HZ
523 int
524 default 128 if ARCH_L7200
525 default 200 if ARCH_EBSA110 || ARCH_S3C2410
Russell Kingbfe65702006-03-04 11:01:53 +0000526 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
Russell Kingf8065812006-03-02 22:41:59 +0000527 default 100
528
Nicolas Pitre704bdda2006-01-14 16:33:50 +0000529config AEABI
530 bool "Use the ARM EABI to compile the kernel"
531 help
532 This option allows for the kernel to be compiled using the latest
533 ARM ABI (aka EABI). This is only useful if you are using a user
534 space environment that is also compiled with EABI.
535
536 Since there are major incompatibilities between the legacy ABI and
537 EABI, especially with regard to structure member alignment, this
538 option also changes the kernel syscall calling convention to
539 disambiguate both ABIs and allow for backward compatibility support
540 (selected with CONFIG_OABI_COMPAT).
541
542 To use this you need GCC version 4.0.0 or later.
543
Nicolas Pitre6c90c872006-01-14 16:37:15 +0000544config OABI_COMPAT
Russell Kinga73a3ff2006-02-08 21:09:55 +0000545 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
Nicolas Pitre61c484d2006-02-08 21:09:08 +0000546 depends on AEABI && EXPERIMENTAL
Nicolas Pitre6c90c872006-01-14 16:37:15 +0000547 default y
548 help
549 This option preserves the old syscall interface along with the
550 new (ARM EABI) one. It also provides a compatibility layer to
551 intercept syscalls that have structure arguments which layout
552 in memory differs between the legacy ABI and the new ARM EABI
553 (only for non "thumb" binaries). This option adds a tiny
554 overhead to all syscalls and produces a slightly larger kernel.
555 If you know you'll be using only pure EABI user space then you
556 can say N here. If this option is not selected and you attempt
557 to execute a legacy ABI binary then the result will be
558 UNPREDICTABLE (in fact it can be predicted that it won't work
559 at all). If in doubt say Y.
560
Dave Hansen3f22ab22005-06-23 00:07:43 -0700561config ARCH_DISCONTIGMEM_ENABLE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 bool
Russell Kingf7e68bb2005-05-05 14:49:01 +0100563 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 help
565 Say Y to support efficient handling of discontiguous physical memory,
566 for architectures which are either NUMA (Non-Uniform Memory Access)
567 or have huge holes in the physical address space for other reasons.
568 See <file:Documentation/vm/numa> for more.
569
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700570config NODES_SHIFT
571 int
572 default "4" if ARCH_LH7A40X
573 default "2"
574 depends on NEED_MULTIPLE_NODES
575
Dave Hansen3f22ab22005-06-23 00:07:43 -0700576source "mm/Kconfig"
577
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578config LEDS
579 bool "Timer and CPU usage LEDs"
580 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
581 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
582 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
583 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
SAN People73a59c12006-01-09 17:05:41 +0000584 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
Jürgen Schindele326764a2006-06-29 16:01:43 +0100585 ARCH_AT91RM9200 || MACH_TRIZEPS4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 help
587 If you say Y here, the LEDs on your machine will be used
588 to provide useful information about your current system status.
589
590 If you are compiling a kernel for a NetWinder or EBSA-285, you will
591 be able to select which LEDs are active using the options below. If
592 you are compiling a kernel for the EBSA-110 or the LART however, the
593 red LED will simply flash regularly to indicate that the system is
594 still functional. It is safe to say Y here if you have a CATS
595 system, but the driver will do nothing.
596
597config LEDS_TIMER
598 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
599 MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
600 depends on LEDS
601 default y if ARCH_EBSA110
602 help
603 If you say Y here, one of the system LEDs (the green one on the
604 NetWinder, the amber one on the EBSA285, or the red one on the LART)
605 will flash regularly to indicate that the system is still
606 operational. This is mainly useful to kernel hackers who are
607 debugging unstable kernels.
608
609 The LART uses the same LED for both Timer LED and CPU usage LED
610 functions. You may choose to use both, but the Timer LED function
611 will overrule the CPU usage LED.
612
613config LEDS_CPU
614 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
615 !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
616 depends on LEDS
617 help
618 If you say Y here, the red LED will be used to give a good real
619 time indication of CPU usage, by lighting whenever the idle task
620 is not currently executing.
621
622 The LART uses the same LED for both Timer LED and CPU usage LED
623 functions. You may choose to use both, but the Timer LED function
624 will overrule the CPU usage LED.
625
626config ALIGNMENT_TRAP
627 bool
628 default y if !ARCH_EBSA110
629 help
630 ARM processors can not fetch/store information which is not
631 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
632 address divisible by 4. On 32-bit ARM processors, these non-aligned
633 fetch/store instructions will be emulated in software if you say
634 here, which has a severe performance impact. This is necessary for
635 correct operation of some network protocols. With an IP-only
636 configuration it is safe to say N, otherwise say Y.
637
638endmenu
639
640menu "Boot options"
641
642# Compressed boot loader in ROM. Yes, we really want to ask about
643# TEXT and BSS so we preserve their values in the config files.
644config ZBOOT_ROM_TEXT
645 hex "Compressed ROM boot loader base address"
646 default "0"
647 help
648 The physical address at which the ROM-able zImage is to be
649 placed in the target. Platforms which normally make use of
650 ROM-able zImage formats normally set this to a suitable
651 value in their defconfig file.
652
653 If ZBOOT_ROM is not enabled, this has no effect.
654
655config ZBOOT_ROM_BSS
656 hex "Compressed ROM boot loader BSS address"
657 default "0"
658 help
Dan Fandrichf8c440b2006-09-20 23:28:51 +0100659 The base address of an area of read/write memory in the target
660 for the ROM-able zImage which must be available while the
661 decompressor is running. It must be large enough to hold the
662 entire decompressed kernel plus an additional 128 KiB.
663 Platforms which normally make use of ROM-able zImage formats
664 normally set this to a suitable value in their defconfig file.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665
666 If ZBOOT_ROM is not enabled, this has no effect.
667
668config ZBOOT_ROM
669 bool "Compressed boot loader in ROM/flash"
670 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
671 help
672 Say Y here if you intend to execute your compressed kernel image
673 (zImage) directly from ROM or flash. If unsure, say N.
674
675config CMDLINE
676 string "Default kernel command string"
677 default ""
678 help
679 On some architectures (EBSA110 and CATS), there is currently no way
680 for the boot loader to pass arguments to the kernel. For these
681 architectures, you should supply some command-line options at build
682 time by entering them here. As a minimum, you should specify the
683 memory size and the root device (e.g., mem=64M root=/dev/nfs).
684
685config XIP_KERNEL
686 bool "Kernel Execute-In-Place from ROM"
687 depends on !ZBOOT_ROM
688 help
689 Execute-In-Place allows the kernel to run from non-volatile storage
690 directly addressable by the CPU, such as NOR flash. This saves RAM
691 space since the text section of the kernel is not loaded from flash
692 to RAM. Read-write sections, such as the data section and stack,
693 are still copied to RAM. The XIP kernel is not compressed since
694 it has to run directly from flash, so it will take more space to
695 store it. The flash address used to link the kernel object files,
696 and for storing it, is configuration dependent. Therefore, if you
697 say Y here, you must know the proper physical address where to
698 store the kernel image depending on your own flash memory usage.
699
700 Also note that the make target becomes "make xipImage" rather than
701 "make zImage" or "make Image". The final kernel binary to put in
702 ROM memory will be arch/arm/boot/xipImage.
703
704 If unsure, say N.
705
706config XIP_PHYS_ADDR
707 hex "XIP Kernel Physical Location"
708 depends on XIP_KERNEL
709 default "0x00080000"
710 help
711 This is the physical address in your flash memory the kernel will
712 be linked for and stored to. This address is dependent on your
713 own flash usage.
714
715endmenu
716
Tony Lindgrena7ca9d22006-06-26 16:16:17 -0700717if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718
719menu "CPU Frequency scaling"
720
721source "drivers/cpufreq/Kconfig"
722
723config CPU_FREQ_SA1100
724 bool
Vincent Sanders07c6d482005-06-09 21:59:22 +0100725 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 -0700726 default y
727
728config CPU_FREQ_SA1110
729 bool
730 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
731 default y
732
733config CPU_FREQ_INTEGRATOR
734 tristate "CPUfreq driver for ARM Integrator CPUs"
735 depends on ARCH_INTEGRATOR && CPU_FREQ
736 default y
737 help
738 This enables the CPUfreq driver for ARM Integrator CPUs.
739
740 For details, take a look at <file:Documentation/cpu-freq>.
741
742 If in doubt, say Y.
743
744endmenu
745
746endif
747
748menu "Floating point emulation"
749
750comment "At least one emulation must be selected"
751
752config FPE_NWFPE
753 bool "NWFPE math emulation"
Nicolas Pitre8993a442006-01-14 16:36:50 +0000754 depends on !AEABI || OABI_COMPAT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 ---help---
756 Say Y to include the NWFPE floating point emulator in the kernel.
757 This is necessary to run most binaries. Linux does not currently
758 support floating point hardware so you need to say Y here even if
759 your machine has an FPA or floating point co-processor podule.
760
761 You may say N here if you are going to load the Acorn FPEmulator
762 early in the bootup.
763
764config FPE_NWFPE_XP
765 bool "Support extended precision"
Lennert Buytenhekbedf1422005-11-07 21:12:08 +0000766 depends on FPE_NWFPE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 help
768 Say Y to include 80-bit support in the kernel floating-point
769 emulator. Otherwise, only 32 and 64-bit support is compiled in.
770 Note that gcc does not generate 80-bit operations by default,
771 so in most cases this option only enlarges the size of the
772 floating point emulator without any good reason.
773
774 You almost surely want to say N here.
775
776config FPE_FASTFPE
777 bool "FastFPE math emulation (EXPERIMENTAL)"
Nicolas Pitre8993a442006-01-14 16:36:50 +0000778 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 ---help---
780 Say Y here to include the FAST floating point emulator in the kernel.
781 This is an experimental much faster emulator which now also has full
782 precision for the mantissa. It does not support any exceptions.
783 It is very simple, and approximately 3-6 times faster than NWFPE.
784
785 It should be sufficient for most programs. It may be not suitable
786 for scientific calculations, but you have to check this for yourself.
787 If you do not feel you need a faster FP emulation you should better
788 choose NWFPE.
789
790config VFP
791 bool "VFP-format floating point maths"
792 depends on CPU_V6 || CPU_ARM926T
793 help
794 Say Y to include VFP support code in the kernel. This is needed
795 if your hardware includes a VFP unit.
796
797 Please see <file:Documentation/arm/VFP/release-notes.txt> for
798 release notes and additional status information.
799
800 Say N if your target does not have VFP hardware.
801
802endmenu
803
804menu "Userspace binary formats"
805
806source "fs/Kconfig.binfmt"
807
808config ARTHUR
809 tristate "RISC OS personality"
Nicolas Pitre704bdda2006-01-14 16:33:50 +0000810 depends on !AEABI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 help
812 Say Y here to include the kernel code necessary if you want to run
813 Acorn RISC OS/Arthur binaries under Linux. This code is still very
814 experimental; if this sounds frightening, say N and sleep in peace.
815 You can also say M here to compile this support as a module (which
816 will be called arthur).
817
818endmenu
819
820menu "Power management options"
821
Russell Kingeceab4a2005-11-15 11:31:41 +0000822source "kernel/power/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824config APM
825 tristate "Advanced Power Management Emulation"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 ---help---
827 APM is a BIOS specification for saving power using several different
828 techniques. This is mostly useful for battery powered laptops with
829 APM compliant BIOSes. If you say Y here, the system time will be
830 reset after a RESUME operation, the /proc/apm device will provide
831 battery status information, and user-space programs will receive
832 notification of APM "events" (e.g. battery status change).
833
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 In order to use APM, you will need supporting software. For location
835 and more information, read <file:Documentation/pm.txt> and the
836 Battery Powered Linux mini-HOWTO, available from
837 <http://www.tldp.org/docs.html#howto>.
838
839 This driver does not spin down disk drives (see the hdparm(8)
840 manpage ("man 8 hdparm") for that), and it doesn't turn off
841 VESA-compliant "green" monitors.
842
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 Generally, if you don't have a battery in your machine, there isn't
844 much point in using this driver and you should say N. If you get
845 random kernel OOPSes or reboots that don't seem to be related to
846 anything, try disabling/enabling this option (or disabling/enabling
847 APM in your BIOS).
848
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849endmenu
850
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700851source "net/Kconfig"
852
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853menu "Device Drivers"
854
855source "drivers/base/Kconfig"
856
Pavel Machekc35bf4a2005-11-12 20:25:25 +0000857source "drivers/connector/Kconfig"
858
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859if ALIGNMENT_TRAP
860source "drivers/mtd/Kconfig"
861endif
862
863source "drivers/parport/Kconfig"
864
865source "drivers/pnp/Kconfig"
866
867source "drivers/block/Kconfig"
868
869source "drivers/acorn/block/Kconfig"
870
Lennert Buytenhek3f7e5812006-09-18 23:10:26 +0100871if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
David Brownellbb011b82005-06-12 23:26:05 +0100872 || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100873 || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
874 || ARCH_IXP23XX
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875source "drivers/ide/Kconfig"
876endif
877
878source "drivers/scsi/Kconfig"
879
880source "drivers/md/Kconfig"
881
882source "drivers/message/fusion/Kconfig"
883
884source "drivers/ieee1394/Kconfig"
885
886source "drivers/message/i2o/Kconfig"
887
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700888source "drivers/net/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889
890source "drivers/isdn/Kconfig"
891
892# input before char - char/joystick depends on it. As does USB.
893
894source "drivers/input/Kconfig"
895
896source "drivers/char/Kconfig"
897
898source "drivers/i2c/Kconfig"
899
David Brownell8ae12a02006-01-08 13:34:19 -0800900source "drivers/spi/Kconfig"
901
Alessandro Zummo04916c02006-03-10 22:30:01 +0000902source "drivers/w1/Kconfig"
903
Jean Delvaread2f9312005-07-02 18:15:49 +0200904source "drivers/hwmon/Kconfig"
905
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906#source "drivers/l3/Kconfig"
907
908source "drivers/misc/Kconfig"
909
Russell Kinga4e137a2005-08-18 10:06:59 +0100910source "drivers/mfd/Kconfig"
911
Richard Purdiec72a1d62006-03-31 02:31:04 -0800912source "drivers/leds/Kconfig"
913
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914source "drivers/media/Kconfig"
915
916source "drivers/video/Kconfig"
917
918source "sound/Kconfig"
919
920source "drivers/usb/Kconfig"
921
922source "drivers/mmc/Kconfig"
923
Alessandro Zummo12b824f2006-03-27 01:16:35 -0800924source "drivers/rtc/Kconfig"
925
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926endmenu
927
928source "fs/Kconfig"
929
930source "arch/arm/oprofile/Kconfig"
931
932source "arch/arm/Kconfig.debug"
933
934source "security/Kconfig"
935
936source "crypto/Kconfig"
937
938source "lib/Kconfig"