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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
98 default 0xffff0000 if MMU
99 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
205config ARCH_IOP3XX
206 bool "IOP3xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100207 depends on MMU
Russell Kingf7e68bb2005-05-05 14:49:01 +0100208 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000209 help
210 Support for Intel's IOP3XX (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211
212config ARCH_IXP4XX
213 bool "IXP4xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100214 depends on MMU
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000215 help
216 Support for Intel's IXP4XX (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217
218config ARCH_IXP2000
219 bool "IXP2400/2800-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100220 depends on MMU
Russell Kingf7e68bb2005-05-05 14:49:01 +0100221 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000222 help
223 Support for Intel's IXP2400/2800 (XScale) family of processors.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100225config ARCH_IXP23XX
226 bool "IXP23XX-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100227 depends on MMU
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100228 select PCI
229 help
230 Support for Intel's IXP23xx (XScale) family of processors.
231
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232config ARCH_L7200
233 bool "LinkUp-L7200"
234 select FIQ
235 help
236 Say Y here if you intend to run this kernel on a LinkUp Systems
237 L7200 Software Development Board which uses an ARM720T processor.
238 Information on this board can be obtained at:
239
240 <http://www.linkupsys.com/>
241
242 If you have any questions or comments about the Linux kernel port
243 to this board, send e-mail to <sjhill@cotw.com>.
244
Deepak Saxena4af6fee2006-06-20 21:30:44 +0100245config ARCH_PNX4008
246 bool "Philips Nexperia PNX4008 Mobile"
247 help
248 This enables support for Philips PNX4008 mobile platform.
249
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250config ARCH_PXA
251 bool "PXA2xx-based"
Russell Kinga4f7e762006-06-28 12:52:41 +0100252 depends on MMU
Al Viro034d2f52005-12-19 16:27:59 -0500253 select ARCH_MTD_XIP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000254 help
255 Support for Intel's PXA2XX processor line.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256
257config ARCH_RPC
258 bool "RiscPC"
259 select ARCH_ACORN
260 select FIQ
261 select TIMER_ACORN
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100262 select ARCH_MAY_HAVE_PC_FDC
Russell King065909b2006-01-04 15:44:16 +0000263 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 help
265 On the Acorn Risc-PC, Linux can support the internal IDE disk and
266 CD-ROM interface, serial and parallel port, and the floppy drive.
267
268config ARCH_SA1100
269 bool "SA1100-based"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100270 select ISA
Russell King3cd9e192005-06-25 19:29:34 +0100271 select ARCH_DISCONTIGMEM_ENABLE
Al Viro034d2f52005-12-19 16:27:59 -0500272 select ARCH_MTD_XIP
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000273 help
274 Support for StrongARM 11x0 based boards.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275
276config ARCH_S3C2410
Ben Dookscd701aa2006-06-26 15:12:58 +0100277 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 help
279 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
280 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
Martin Michlmayrf6c89652006-02-08 21:09:07 +0000281 the Samsung SMDK2410 development board (and derivatives).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282
283config ARCH_SHARK
284 bool "Shark"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100285 select ISA
286 select ISA_DMA
287 select PCI
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000288 help
289 Support for the StrongARM based Digital DNARD machine, also known
290 as "Shark" (<http://www.shark-linux.de/shark.html>).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291
292config ARCH_LH7A40X
293 bool "Sharp LH7A40X"
294 help
295 Say Y here for systems based on one of the Sharp LH7A40X
296 System on a Chip processors. These CPUs include an ARM922T
297 core with a wide array of integrated devices for
298 hand-held and low-power applications.
299
300config ARCH_OMAP
301 bool "TI OMAP"
Martin Michlmayrf999b8b2006-02-08 21:09:05 +0000302 help
303 Support for TI's OMAP platform (OMAP1 and OMAP2).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305endchoice
306
307source "arch/arm/mach-clps711x/Kconfig"
308
Lennert Buytenheke7736d42006-03-20 17:10:13 +0000309source "arch/arm/mach-ep93xx/Kconfig"
310
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311source "arch/arm/mach-footbridge/Kconfig"
312
313source "arch/arm/mach-integrator/Kconfig"
314
315source "arch/arm/mach-iop3xx/Kconfig"
316
317source "arch/arm/mach-ixp4xx/Kconfig"
318
319source "arch/arm/mach-ixp2000/Kconfig"
320
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100321source "arch/arm/mach-ixp23xx/Kconfig"
322
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323source "arch/arm/mach-pxa/Kconfig"
324
325source "arch/arm/mach-sa1100/Kconfig"
326
Tony Lindgrend48af152005-07-10 19:58:17 +0100327source "arch/arm/plat-omap/Kconfig"
328
329source "arch/arm/mach-omap1/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
Tony Lindgren1dbae812005-11-10 14:26:51 +0000331source "arch/arm/mach-omap2/Kconfig"
332
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333source "arch/arm/mach-s3c2410/Kconfig"
334
335source "arch/arm/mach-lh7a40x/Kconfig"
336
337source "arch/arm/mach-imx/Kconfig"
338
339source "arch/arm/mach-h720x/Kconfig"
340
341source "arch/arm/mach-versatile/Kconfig"
342
Bellido Nicolas038c5b62005-06-20 18:51:05 +0100343source "arch/arm/mach-aaec2000/Kconfig"
344
Catalin Marinas8ad68bb2005-10-31 14:25:02 +0000345source "arch/arm/mach-realview/Kconfig"
346
SAN People73a59c12006-01-09 17:05:41 +0000347source "arch/arm/mach-at91rm9200/Kconfig"
348
Sascha Hauerbb6d8c82006-06-19 15:27:53 +0100349source "arch/arm/mach-netx/Kconfig"
350
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351# Definitions to make life easier
352config ARCH_ACORN
353 bool
354
355source arch/arm/mm/Kconfig
356
357# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
358config XSCALE_PMU
359 bool
360 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
361 default y
362
Hyok S. Choi3b93e7b2006-06-22 11:48:56 +0100363if !MMU
364source "arch/arm/Kconfig-nommu"
365endif
366
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367endmenu
368
369source "arch/arm/common/Kconfig"
370
371config FORCE_MAX_ZONEORDER
372 int
373 depends on SA1111
374 default "9"
375
376menu "Bus support"
377
378config ARM_AMBA
379 bool
380
381config ISA
382 bool
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 help
384 Find out whether you have ISA slots on your motherboard. ISA is the
385 name of a bus system, i.e. the way the CPU talks to the other stuff
386 inside your box. Other bus systems are PCI, EISA, MicroChannel
387 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
388 newer boards don't support it. If you have ISA, say Y, otherwise N.
389
Russell King065909b2006-01-04 15:44:16 +0000390# Select ISA DMA controller support
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391config ISA_DMA
392 bool
Russell King065909b2006-01-04 15:44:16 +0000393 select ISA_DMA_API
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394
Russell King065909b2006-01-04 15:44:16 +0000395# Select ISA DMA interface
Al Viro5cae8412005-05-04 05:39:22 +0100396config ISA_DMA_API
397 bool
Al Viro5cae8412005-05-04 05:39:22 +0100398
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399config PCI
Milan Svoboda68939122006-06-25 22:12:12 +0100400 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 help
402 Find out whether you have a PCI motherboard. PCI is the name of a
403 bus system, i.e. the way the CPU talks to the other stuff inside
404 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
405 VESA. If you have PCI, say Y, otherwise N.
406
407 The PCI-HOWTO, available from
408 <http://www.tldp.org/docs.html#howto>, contains valuable
409 information about which PCI hardware does work under Linux and which
410 doesn't.
411
412# Select the host bridge type
413config PCI_HOST_VIA82C505
414 bool
415 depends on PCI && ARCH_SHARK
416 default y
417
418source "drivers/pci/Kconfig"
419
420source "drivers/pcmcia/Kconfig"
421
422endmenu
423
424menu "Kernel Features"
425
426config SMP
427 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
Russell Kingf6db4492005-11-07 21:30:21 +0000428 depends on EXPERIMENTAL && REALVIEW_MPCORE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 help
430 This enables support for systems with more than one CPU. If you have
431 a system with only one CPU, like most personal computers, say N. If
432 you have a system with more than one CPU, say Y.
433
434 If you say N here, the kernel will run on single and multiprocessor
435 machines, but will use only one CPU of a multiprocessor machine. If
436 you say Y here, the kernel will run on many, but not all, single
437 processor machines. On a single processor machine, the kernel will
438 run faster if you say N here.
439
Arthur Othieno12c62c22005-09-10 00:26:22 -0700440 See also the <file:Documentation/smp.txt>,
441 <file:Documentation/i386/IO-APIC.txt>,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
443 <http://www.linuxdoc.org/docs.html#howto>.
444
445 If you don't know what to do here, say N.
446
447config NR_CPUS
448 int "Maximum number of CPUs (2-32)"
449 range 2 32
450 depends on SMP
451 default "4"
452
Russell Kinga054a812005-11-02 22:24:33 +0000453config HOTPLUG_CPU
454 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
455 depends on SMP && HOTPLUG && EXPERIMENTAL
456 help
457 Say Y here to experiment with turning CPUs off and on. CPUs
458 can be controlled through /sys/devices/system/cpu.
459
Russell King37ee16a2005-11-08 19:08:05 +0000460config LOCAL_TIMERS
461 bool "Use local timer interrupts"
Russell King2a98beb2005-11-09 10:50:29 +0000462 depends on SMP && REALVIEW_MPCORE
Russell King37ee16a2005-11-08 19:08:05 +0000463 default y
464 help
465 Enable support for local timers on SMP platforms, rather then the
466 legacy IPI broadcast method. Local timers allows the system
467 accounting to be spread across the timer interval, preventing a
468 "thundering herd" at every timer tick.
469
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470config PREEMPT
471 bool "Preemptible Kernel (EXPERIMENTAL)"
472 depends on EXPERIMENTAL
473 help
474 This option reduces the latency of the kernel when reacting to
475 real-time or interactive events by allowing a low priority process to
476 be preempted even if it is in kernel mode executing a system call.
477 This allows applications to run more reliably even when the system is
478 under load.
479
480 Say Y here if you are building a kernel for a desktop, embedded
481 or real-time system. Say N if you are unsure.
482
Russell King8749af62005-06-25 19:39:45 +0100483config NO_IDLE_HZ
484 bool "Dynamic tick timer"
485 help
486 Select this option if you want to disable continuous timer ticks
487 and have them programmed to occur as required. This option saves
488 power as the system can remain in idle state for longer.
489
490 By default dynamic tick is disabled during the boot, and can be
491 manually enabled with:
492
493 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
494
495 Alternatively, if you want dynamic tick automatically enabled
496 during boot, pass "dyntick=enable" via the kernel command string.
497
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100498 Please note that dynamic tick may affect the accuracy of
499 timekeeping on some platforms depending on the implementation.
Nicolas Pitre569d2c32005-09-01 12:48:48 +0100500 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
501 to have accurate timekeeping with dynamic tick.
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100502
Russell Kingf8065812006-03-02 22:41:59 +0000503config HZ
504 int
505 default 128 if ARCH_L7200
506 default 200 if ARCH_EBSA110 || ARCH_S3C2410
Russell Kingbfe65702006-03-04 11:01:53 +0000507 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
Russell Kingf8065812006-03-02 22:41:59 +0000508 default 100
509
Nicolas Pitre704bdda2006-01-14 16:33:50 +0000510config AEABI
511 bool "Use the ARM EABI to compile the kernel"
512 help
513 This option allows for the kernel to be compiled using the latest
514 ARM ABI (aka EABI). This is only useful if you are using a user
515 space environment that is also compiled with EABI.
516
517 Since there are major incompatibilities between the legacy ABI and
518 EABI, especially with regard to structure member alignment, this
519 option also changes the kernel syscall calling convention to
520 disambiguate both ABIs and allow for backward compatibility support
521 (selected with CONFIG_OABI_COMPAT).
522
523 To use this you need GCC version 4.0.0 or later.
524
Nicolas Pitre6c90c872006-01-14 16:37:15 +0000525config OABI_COMPAT
Russell Kinga73a3ff2006-02-08 21:09:55 +0000526 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
Nicolas Pitre61c484d2006-02-08 21:09:08 +0000527 depends on AEABI && EXPERIMENTAL
Nicolas Pitre6c90c872006-01-14 16:37:15 +0000528 default y
529 help
530 This option preserves the old syscall interface along with the
531 new (ARM EABI) one. It also provides a compatibility layer to
532 intercept syscalls that have structure arguments which layout
533 in memory differs between the legacy ABI and the new ARM EABI
534 (only for non "thumb" binaries). This option adds a tiny
535 overhead to all syscalls and produces a slightly larger kernel.
536 If you know you'll be using only pure EABI user space then you
537 can say N here. If this option is not selected and you attempt
538 to execute a legacy ABI binary then the result will be
539 UNPREDICTABLE (in fact it can be predicted that it won't work
540 at all). If in doubt say Y.
541
Dave Hansen3f22ab22005-06-23 00:07:43 -0700542config ARCH_DISCONTIGMEM_ENABLE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 bool
Russell Kingf7e68bb2005-05-05 14:49:01 +0100544 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 help
546 Say Y to support efficient handling of discontiguous physical memory,
547 for architectures which are either NUMA (Non-Uniform Memory Access)
548 or have huge holes in the physical address space for other reasons.
549 See <file:Documentation/vm/numa> for more.
550
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700551config NODES_SHIFT
552 int
553 default "4" if ARCH_LH7A40X
554 default "2"
555 depends on NEED_MULTIPLE_NODES
556
Dave Hansen3f22ab22005-06-23 00:07:43 -0700557source "mm/Kconfig"
558
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559config LEDS
560 bool "Timer and CPU usage LEDs"
561 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
562 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
563 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
564 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
SAN People73a59c12006-01-09 17:05:41 +0000565 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
Jürgen Schindele326764a2006-06-29 16:01:43 +0100566 ARCH_AT91RM9200 || MACH_TRIZEPS4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 help
568 If you say Y here, the LEDs on your machine will be used
569 to provide useful information about your current system status.
570
571 If you are compiling a kernel for a NetWinder or EBSA-285, you will
572 be able to select which LEDs are active using the options below. If
573 you are compiling a kernel for the EBSA-110 or the LART however, the
574 red LED will simply flash regularly to indicate that the system is
575 still functional. It is safe to say Y here if you have a CATS
576 system, but the driver will do nothing.
577
578config LEDS_TIMER
579 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
580 MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
581 depends on LEDS
582 default y if ARCH_EBSA110
583 help
584 If you say Y here, one of the system LEDs (the green one on the
585 NetWinder, the amber one on the EBSA285, or the red one on the LART)
586 will flash regularly to indicate that the system is still
587 operational. This is mainly useful to kernel hackers who are
588 debugging unstable kernels.
589
590 The LART uses the same LED for both Timer LED and CPU usage LED
591 functions. You may choose to use both, but the Timer LED function
592 will overrule the CPU usage LED.
593
594config LEDS_CPU
595 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
596 !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
597 depends on LEDS
598 help
599 If you say Y here, the red LED will be used to give a good real
600 time indication of CPU usage, by lighting whenever the idle task
601 is not currently executing.
602
603 The LART uses the same LED for both Timer LED and CPU usage LED
604 functions. You may choose to use both, but the Timer LED function
605 will overrule the CPU usage LED.
606
607config ALIGNMENT_TRAP
608 bool
609 default y if !ARCH_EBSA110
610 help
611 ARM processors can not fetch/store information which is not
612 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
613 address divisible by 4. On 32-bit ARM processors, these non-aligned
614 fetch/store instructions will be emulated in software if you say
615 here, which has a severe performance impact. This is necessary for
616 correct operation of some network protocols. With an IP-only
617 configuration it is safe to say N, otherwise say Y.
618
619endmenu
620
621menu "Boot options"
622
623# Compressed boot loader in ROM. Yes, we really want to ask about
624# TEXT and BSS so we preserve their values in the config files.
625config ZBOOT_ROM_TEXT
626 hex "Compressed ROM boot loader base address"
627 default "0"
628 help
629 The physical address at which the ROM-able zImage is to be
630 placed in the target. Platforms which normally make use of
631 ROM-able zImage formats normally set this to a suitable
632 value in their defconfig file.
633
634 If ZBOOT_ROM is not enabled, this has no effect.
635
636config ZBOOT_ROM_BSS
637 hex "Compressed ROM boot loader BSS address"
638 default "0"
639 help
640 The base address of 64KiB of read/write memory in the target
641 for the ROM-able zImage, which must be available while the
642 decompressor is running. Platforms which normally make use of
643 ROM-able zImage formats normally set this to a suitable
644 value in their defconfig file.
645
646 If ZBOOT_ROM is not enabled, this has no effect.
647
648config ZBOOT_ROM
649 bool "Compressed boot loader in ROM/flash"
650 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
651 help
652 Say Y here if you intend to execute your compressed kernel image
653 (zImage) directly from ROM or flash. If unsure, say N.
654
655config CMDLINE
656 string "Default kernel command string"
657 default ""
658 help
659 On some architectures (EBSA110 and CATS), there is currently no way
660 for the boot loader to pass arguments to the kernel. For these
661 architectures, you should supply some command-line options at build
662 time by entering them here. As a minimum, you should specify the
663 memory size and the root device (e.g., mem=64M root=/dev/nfs).
664
665config XIP_KERNEL
666 bool "Kernel Execute-In-Place from ROM"
667 depends on !ZBOOT_ROM
668 help
669 Execute-In-Place allows the kernel to run from non-volatile storage
670 directly addressable by the CPU, such as NOR flash. This saves RAM
671 space since the text section of the kernel is not loaded from flash
672 to RAM. Read-write sections, such as the data section and stack,
673 are still copied to RAM. The XIP kernel is not compressed since
674 it has to run directly from flash, so it will take more space to
675 store it. The flash address used to link the kernel object files,
676 and for storing it, is configuration dependent. Therefore, if you
677 say Y here, you must know the proper physical address where to
678 store the kernel image depending on your own flash memory usage.
679
680 Also note that the make target becomes "make xipImage" rather than
681 "make zImage" or "make Image". The final kernel binary to put in
682 ROM memory will be arch/arm/boot/xipImage.
683
684 If unsure, say N.
685
686config XIP_PHYS_ADDR
687 hex "XIP Kernel Physical Location"
688 depends on XIP_KERNEL
689 default "0x00080000"
690 help
691 This is the physical address in your flash memory the kernel will
692 be linked for and stored to. This address is dependent on your
693 own flash usage.
694
695endmenu
696
Tony Lindgrena7ca9d22006-06-26 16:16:17 -0700697if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698
699menu "CPU Frequency scaling"
700
701source "drivers/cpufreq/Kconfig"
702
703config CPU_FREQ_SA1100
704 bool
Vincent Sanders07c6d482005-06-09 21:59:22 +0100705 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 -0700706 default y
707
708config CPU_FREQ_SA1110
709 bool
710 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
711 default y
712
713config CPU_FREQ_INTEGRATOR
714 tristate "CPUfreq driver for ARM Integrator CPUs"
715 depends on ARCH_INTEGRATOR && CPU_FREQ
716 default y
717 help
718 This enables the CPUfreq driver for ARM Integrator CPUs.
719
720 For details, take a look at <file:Documentation/cpu-freq>.
721
722 If in doubt, say Y.
723
724endmenu
725
726endif
727
728menu "Floating point emulation"
729
730comment "At least one emulation must be selected"
731
732config FPE_NWFPE
733 bool "NWFPE math emulation"
Nicolas Pitre8993a442006-01-14 16:36:50 +0000734 depends on !AEABI || OABI_COMPAT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 ---help---
736 Say Y to include the NWFPE floating point emulator in the kernel.
737 This is necessary to run most binaries. Linux does not currently
738 support floating point hardware so you need to say Y here even if
739 your machine has an FPA or floating point co-processor podule.
740
741 You may say N here if you are going to load the Acorn FPEmulator
742 early in the bootup.
743
744config FPE_NWFPE_XP
745 bool "Support extended precision"
Lennert Buytenhekbedf1422005-11-07 21:12:08 +0000746 depends on FPE_NWFPE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 help
748 Say Y to include 80-bit support in the kernel floating-point
749 emulator. Otherwise, only 32 and 64-bit support is compiled in.
750 Note that gcc does not generate 80-bit operations by default,
751 so in most cases this option only enlarges the size of the
752 floating point emulator without any good reason.
753
754 You almost surely want to say N here.
755
756config FPE_FASTFPE
757 bool "FastFPE math emulation (EXPERIMENTAL)"
Nicolas Pitre8993a442006-01-14 16:36:50 +0000758 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 ---help---
760 Say Y here to include the FAST floating point emulator in the kernel.
761 This is an experimental much faster emulator which now also has full
762 precision for the mantissa. It does not support any exceptions.
763 It is very simple, and approximately 3-6 times faster than NWFPE.
764
765 It should be sufficient for most programs. It may be not suitable
766 for scientific calculations, but you have to check this for yourself.
767 If you do not feel you need a faster FP emulation you should better
768 choose NWFPE.
769
770config VFP
771 bool "VFP-format floating point maths"
772 depends on CPU_V6 || CPU_ARM926T
773 help
774 Say Y to include VFP support code in the kernel. This is needed
775 if your hardware includes a VFP unit.
776
777 Please see <file:Documentation/arm/VFP/release-notes.txt> for
778 release notes and additional status information.
779
780 Say N if your target does not have VFP hardware.
781
782endmenu
783
784menu "Userspace binary formats"
785
786source "fs/Kconfig.binfmt"
787
788config ARTHUR
789 tristate "RISC OS personality"
Nicolas Pitre704bdda2006-01-14 16:33:50 +0000790 depends on !AEABI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791 help
792 Say Y here to include the kernel code necessary if you want to run
793 Acorn RISC OS/Arthur binaries under Linux. This code is still very
794 experimental; if this sounds frightening, say N and sleep in peace.
795 You can also say M here to compile this support as a module (which
796 will be called arthur).
797
798endmenu
799
800menu "Power management options"
801
Russell Kingeceab4a2005-11-15 11:31:41 +0000802source "kernel/power/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804config APM
805 tristate "Advanced Power Management Emulation"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 ---help---
807 APM is a BIOS specification for saving power using several different
808 techniques. This is mostly useful for battery powered laptops with
809 APM compliant BIOSes. If you say Y here, the system time will be
810 reset after a RESUME operation, the /proc/apm device will provide
811 battery status information, and user-space programs will receive
812 notification of APM "events" (e.g. battery status change).
813
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 In order to use APM, you will need supporting software. For location
815 and more information, read <file:Documentation/pm.txt> and the
816 Battery Powered Linux mini-HOWTO, available from
817 <http://www.tldp.org/docs.html#howto>.
818
819 This driver does not spin down disk drives (see the hdparm(8)
820 manpage ("man 8 hdparm") for that), and it doesn't turn off
821 VESA-compliant "green" monitors.
822
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 Generally, if you don't have a battery in your machine, there isn't
824 much point in using this driver and you should say N. If you get
825 random kernel OOPSes or reboots that don't seem to be related to
826 anything, try disabling/enabling this option (or disabling/enabling
827 APM in your BIOS).
828
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829endmenu
830
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700831source "net/Kconfig"
832
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833menu "Device Drivers"
834
835source "drivers/base/Kconfig"
836
Pavel Machekc35bf4a2005-11-12 20:25:25 +0000837source "drivers/connector/Kconfig"
838
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839if ALIGNMENT_TRAP
840source "drivers/mtd/Kconfig"
841endif
842
843source "drivers/parport/Kconfig"
844
845source "drivers/pnp/Kconfig"
846
847source "drivers/block/Kconfig"
848
849source "drivers/acorn/block/Kconfig"
850
David Brownellbb011b82005-06-12 23:26:05 +0100851if PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \
852 || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
Lennert Buytenhekc4713072006-03-28 21:18:54 +0100853 || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
854 || ARCH_IXP23XX
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855source "drivers/ide/Kconfig"
856endif
857
858source "drivers/scsi/Kconfig"
859
860source "drivers/md/Kconfig"
861
862source "drivers/message/fusion/Kconfig"
863
864source "drivers/ieee1394/Kconfig"
865
866source "drivers/message/i2o/Kconfig"
867
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700868source "drivers/net/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869
870source "drivers/isdn/Kconfig"
871
872# input before char - char/joystick depends on it. As does USB.
873
874source "drivers/input/Kconfig"
875
876source "drivers/char/Kconfig"
877
878source "drivers/i2c/Kconfig"
879
David Brownell8ae12a02006-01-08 13:34:19 -0800880source "drivers/spi/Kconfig"
881
Alessandro Zummo04916c02006-03-10 22:30:01 +0000882source "drivers/w1/Kconfig"
883
Jean Delvaread2f9312005-07-02 18:15:49 +0200884source "drivers/hwmon/Kconfig"
885
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886#source "drivers/l3/Kconfig"
887
888source "drivers/misc/Kconfig"
889
Russell Kinga4e137a2005-08-18 10:06:59 +0100890source "drivers/mfd/Kconfig"
891
Richard Purdiec72a1d62006-03-31 02:31:04 -0800892source "drivers/leds/Kconfig"
893
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894source "drivers/media/Kconfig"
895
896source "drivers/video/Kconfig"
897
898source "sound/Kconfig"
899
900source "drivers/usb/Kconfig"
901
902source "drivers/mmc/Kconfig"
903
Alessandro Zummo12b824f2006-03-27 01:16:35 -0800904source "drivers/rtc/Kconfig"
905
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906endmenu
907
908source "fs/Kconfig"
909
910source "arch/arm/oprofile/Kconfig"
911
912source "arch/arm/Kconfig.debug"
913
914source "security/Kconfig"
915
916source "crypto/Kconfig"
917
918source "lib/Kconfig"