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1da177e4
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1#
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
11 help
12 The ARM series is a line of low-power-consumption RISC chip designs
f6c8965a 13 licensed by ARM Ltd and targeted at embedded applications and
1da177e4 14 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
f6c8965a 15 manufactured, but legacy ARM-based PC hardware remains popular in
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16 Europe. There is an ARM Linux project with a web page at
17 <http://www.arm.linux.org.uk/>.
18
19config MMU
20 bool
21 default y
22
23config EISA
24 bool
25 ---help---
26 The Extended Industry Standard Architecture (EISA) bus was
27 developed as an open alternative to the IBM MicroChannel bus.
28
29 The EISA bus provided some of the features of the IBM MicroChannel
30 bus while maintaining backward compatibility with cards made for
31 the older ISA bus. The EISA bus saw limited use between 1988 and
32 1995 when it was made obsolete by the PCI bus.
33
34 Say Y here if you are building a kernel for an EISA-based machine.
35
36 Otherwise, say N.
37
38config SBUS
39 bool
40
41config MCA
42 bool
43 help
44 MicroChannel Architecture is found in some IBM PS/2 machines and
45 laptops. It is a bus system similar to PCI or ISA. See
46 <file:Documentation/mca.txt> (and especially the web page given
47 there) before attempting to build an MCA bus kernel.
48
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49config RWSEM_GENERIC_SPINLOCK
50 bool
51 default y
52
53config RWSEM_XCHGADD_ALGORITHM
54 bool
55
b89c3b16
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56config GENERIC_HWEIGHT
57 bool
58 default y
59
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60config GENERIC_CALIBRATE_DELAY
61 bool
62 default y
63
64config GENERIC_BUST_SPINLOCK
65 bool
66
a08b6b79
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67config ARCH_MAY_HAVE_PC_FDC
68 bool
69
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70config GENERIC_ISA_DMA
71 bool
72
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73config FIQ
74 bool
75
034d2f5a
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76config ARCH_MTD_XIP
77 bool
78
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79source "init/Kconfig"
80
81menu "System Type"
82
83choice
84 prompt "ARM system type"
6a0e2430 85 default ARCH_VERSATILE
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86
87config ARCH_CLPS7500
88 bool "Cirrus-CL-PS7500FE"
89 select TIMER_ACORN
f7e68bbf 90 select ISA
f999b8bd
MM
91 help
92 Support for the Cirrus Logic PS7500FE system-on-a-chip.
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93
94config ARCH_CLPS711X
95 bool "CLPS711x/EP721x-based"
f999b8bd
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96 help
97 Support for Cirrus Logic 711x/721x based boards.
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98
99config ARCH_CO285
100 bool "Co-EBSA285"
101 select FOOTBRIDGE
102 select FOOTBRIDGE_ADDIN
f999b8bd
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103 help
104 Support for Intel's EBSA285 companion chip.
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105
106config ARCH_EBSA110
107 bool "EBSA-110"
f7e68bbf 108 select ISA
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109 help
110 This is an evaluation board for the StrongARM processor available
f6c8965a 111 from Digital. It has limited hardware on-board, including an
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112 Ethernet interface, two PCMCIA sockets, two serial ports and a
113 parallel port.
114
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115config ARCH_EP93XX
116 bool "EP93xx-based"
117 select ARM_AMBA
118 select ARM_VIC
119 help
120 This enables support for the Cirrus EP93xx series of CPUs.
121
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122config ARCH_FOOTBRIDGE
123 bool "FootBridge"
124 select FOOTBRIDGE
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125 help
126 Support for systems based on the DC21285 companion chip
127 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
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128
129config ARCH_INTEGRATOR
130 bool "Integrator"
131 select ARM_AMBA
132 select ICST525
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133 help
134 Support for ARM's Integrator platform.
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135
136config ARCH_IOP3XX
137 bool "IOP3xx-based"
f7e68bbf 138 select PCI
f999b8bd
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139 help
140 Support for Intel's IOP3XX (XScale) family of processors.
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141
142config ARCH_IXP4XX
143 bool "IXP4xx-based"
144 select DMABOUNCE
f7e68bbf 145 select PCI
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146 help
147 Support for Intel's IXP4XX (XScale) family of processors.
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148
149config ARCH_IXP2000
150 bool "IXP2400/2800-based"
f7e68bbf 151 select PCI
f999b8bd
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152 help
153 Support for Intel's IXP2400/2800 (XScale) family of processors.
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154
155config ARCH_L7200
156 bool "LinkUp-L7200"
157 select FIQ
158 help
159 Say Y here if you intend to run this kernel on a LinkUp Systems
160 L7200 Software Development Board which uses an ARM720T processor.
161 Information on this board can be obtained at:
162
163 <http://www.linkupsys.com/>
164
165 If you have any questions or comments about the Linux kernel port
166 to this board, send e-mail to <sjhill@cotw.com>.
167
168config ARCH_PXA
169 bool "PXA2xx-based"
034d2f5a 170 select ARCH_MTD_XIP
f999b8bd
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171 help
172 Support for Intel's PXA2XX processor line.
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173
174config ARCH_RPC
175 bool "RiscPC"
176 select ARCH_ACORN
177 select FIQ
178 select TIMER_ACORN
a08b6b79 179 select ARCH_MAY_HAVE_PC_FDC
065909b9 180 select ISA_DMA_API
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181 help
182 On the Acorn Risc-PC, Linux can support the internal IDE disk and
183 CD-ROM interface, serial and parallel port, and the floppy drive.
184
185config ARCH_SA1100
186 bool "SA1100-based"
f7e68bbf 187 select ISA
3cd9e19e 188 select ARCH_DISCONTIGMEM_ENABLE
034d2f5a 189 select ARCH_MTD_XIP
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190 help
191 Support for StrongARM 11x0 based boards.
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192
193config ARCH_S3C2410
194 bool "Samsung S3C2410"
195 help
196 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
197 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
f6c8965a 198 the Samsung SMDK2410 development board (and derivatives).
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199
200config ARCH_SHARK
201 bool "Shark"
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202 select ISA
203 select ISA_DMA
204 select PCI
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205 help
206 Support for the StrongARM based Digital DNARD machine, also known
207 as "Shark" (<http://www.shark-linux.de/shark.html>).
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208
209config ARCH_LH7A40X
210 bool "Sharp LH7A40X"
211 help
212 Say Y here for systems based on one of the Sharp LH7A40X
213 System on a Chip processors. These CPUs include an ARM922T
214 core with a wide array of integrated devices for
215 hand-held and low-power applications.
216
217config ARCH_OMAP
218 bool "TI OMAP"
f999b8bd
MM
219 help
220 Support for TI's OMAP platform (OMAP1 and OMAP2).
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221
222config ARCH_VERSATILE
223 bool "Versatile"
224 select ARM_AMBA
fa0fe48f 225 select ARM_VIC
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226 select ICST307
227 help
228 This enables support for ARM Ltd Versatile board.
229
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230config ARCH_REALVIEW
231 bool "RealView"
232 select ARM_AMBA
233 select ICST307
234 help
235 This enables support for ARM Ltd RealView boards.
236
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237config ARCH_IMX
238 bool "IMX"
f999b8bd
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239 help
240 Support for Motorola's i.MX family of processors (MX1, MXL).
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241
242config ARCH_H720X
243 bool "Hynix-HMS720x-based"
065909b9 244 select ISA_DMA_API
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245 help
246 This enables support for systems based on the Hynix HMS720x
247
038c5b60
BN
248config ARCH_AAEC2000
249 bool "Agilent AAEC-2000 based"
049eb329 250 select ARM_AMBA
038c5b60
BN
251 help
252 This enables support for systems based on the Agilent AAEC-2000
253
73a59c1c
SP
254config ARCH_AT91RM9200
255 bool "AT91RM9200"
256 help
f999b8bd
MM
257 Say Y here if you intend to run this kernel on an Atmel
258 AT91RM9200-based board.
73a59c1c 259
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260endchoice
261
262source "arch/arm/mach-clps711x/Kconfig"
263
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264source "arch/arm/mach-ep93xx/Kconfig"
265
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266source "arch/arm/mach-footbridge/Kconfig"
267
268source "arch/arm/mach-integrator/Kconfig"
269
270source "arch/arm/mach-iop3xx/Kconfig"
271
272source "arch/arm/mach-ixp4xx/Kconfig"
273
274source "arch/arm/mach-ixp2000/Kconfig"
275
276source "arch/arm/mach-pxa/Kconfig"
277
278source "arch/arm/mach-sa1100/Kconfig"
279
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280source "arch/arm/plat-omap/Kconfig"
281
282source "arch/arm/mach-omap1/Kconfig"
1da177e4 283
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284source "arch/arm/mach-omap2/Kconfig"
285
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286source "arch/arm/mach-s3c2410/Kconfig"
287
288source "arch/arm/mach-lh7a40x/Kconfig"
289
290source "arch/arm/mach-imx/Kconfig"
291
292source "arch/arm/mach-h720x/Kconfig"
293
294source "arch/arm/mach-versatile/Kconfig"
295
038c5b60
BN
296source "arch/arm/mach-aaec2000/Kconfig"
297
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298source "arch/arm/mach-realview/Kconfig"
299
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300source "arch/arm/mach-at91rm9200/Kconfig"
301
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302# Definitions to make life easier
303config ARCH_ACORN
304 bool
305
306source arch/arm/mm/Kconfig
307
308# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
309config XSCALE_PMU
310 bool
311 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
312 default y
313
314endmenu
315
316source "arch/arm/common/Kconfig"
317
318config FORCE_MAX_ZONEORDER
319 int
320 depends on SA1111
321 default "9"
322
323menu "Bus support"
324
325config ARM_AMBA
326 bool
327
328config ISA
329 bool
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330 help
331 Find out whether you have ISA slots on your motherboard. ISA is the
332 name of a bus system, i.e. the way the CPU talks to the other stuff
333 inside your box. Other bus systems are PCI, EISA, MicroChannel
334 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
335 newer boards don't support it. If you have ISA, say Y, otherwise N.
336
065909b9 337# Select ISA DMA controller support
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338config ISA_DMA
339 bool
065909b9 340 select ISA_DMA_API
1da177e4 341
065909b9 342# Select ISA DMA interface
5cae841b
AV
343config ISA_DMA_API
344 bool
5cae841b 345
1da177e4 346config PCI
c0da085a 347 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB
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348 help
349 Find out whether you have a PCI motherboard. PCI is the name of a
350 bus system, i.e. the way the CPU talks to the other stuff inside
351 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
352 VESA. If you have PCI, say Y, otherwise N.
353
354 The PCI-HOWTO, available from
355 <http://www.tldp.org/docs.html#howto>, contains valuable
356 information about which PCI hardware does work under Linux and which
357 doesn't.
358
359# Select the host bridge type
360config PCI_HOST_VIA82C505
361 bool
362 depends on PCI && ARCH_SHARK
363 default y
364
365source "drivers/pci/Kconfig"
366
367source "drivers/pcmcia/Kconfig"
368
369endmenu
370
371menu "Kernel Features"
372
373config SMP
374 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
f6db449c 375 depends on EXPERIMENTAL && REALVIEW_MPCORE
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376 help
377 This enables support for systems with more than one CPU. If you have
378 a system with only one CPU, like most personal computers, say N. If
379 you have a system with more than one CPU, say Y.
380
381 If you say N here, the kernel will run on single and multiprocessor
382 machines, but will use only one CPU of a multiprocessor machine. If
383 you say Y here, the kernel will run on many, but not all, single
384 processor machines. On a single processor machine, the kernel will
385 run faster if you say N here.
386
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387 See also the <file:Documentation/smp.txt>,
388 <file:Documentation/i386/IO-APIC.txt>,
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389 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
390 <http://www.linuxdoc.org/docs.html#howto>.
391
392 If you don't know what to do here, say N.
393
394config NR_CPUS
395 int "Maximum number of CPUs (2-32)"
396 range 2 32
397 depends on SMP
398 default "4"
399
a054a811
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400config HOTPLUG_CPU
401 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
402 depends on SMP && HOTPLUG && EXPERIMENTAL
403 help
404 Say Y here to experiment with turning CPUs off and on. CPUs
405 can be controlled through /sys/devices/system/cpu.
406
37ee16ae
RK
407config LOCAL_TIMERS
408 bool "Use local timer interrupts"
2a98beb6 409 depends on SMP && REALVIEW_MPCORE
37ee16ae
RK
410 default y
411 help
412 Enable support for local timers on SMP platforms, rather then the
413 legacy IPI broadcast method. Local timers allows the system
414 accounting to be spread across the timer interval, preventing a
415 "thundering herd" at every timer tick.
416
1da177e4
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417config PREEMPT
418 bool "Preemptible Kernel (EXPERIMENTAL)"
419 depends on EXPERIMENTAL
420 help
421 This option reduces the latency of the kernel when reacting to
422 real-time or interactive events by allowing a low priority process to
423 be preempted even if it is in kernel mode executing a system call.
424 This allows applications to run more reliably even when the system is
425 under load.
426
427 Say Y here if you are building a kernel for a desktop, embedded
428 or real-time system. Say N if you are unsure.
429
8749af68
RK
430config NO_IDLE_HZ
431 bool "Dynamic tick timer"
432 help
433 Select this option if you want to disable continuous timer ticks
434 and have them programmed to occur as required. This option saves
435 power as the system can remain in idle state for longer.
436
437 By default dynamic tick is disabled during the boot, and can be
438 manually enabled with:
439
440 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
441
442 Alternatively, if you want dynamic tick automatically enabled
443 during boot, pass "dyntick=enable" via the kernel command string.
444
f2be64b3
TL
445 Please note that dynamic tick may affect the accuracy of
446 timekeeping on some platforms depending on the implementation.
569d2c34
NP
447 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
448 to have accurate timekeeping with dynamic tick.
f2be64b3 449
f8065813
RK
450config HZ
451 int
452 default 128 if ARCH_L7200
453 default 200 if ARCH_EBSA110 || ARCH_S3C2410
bfe65704 454 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
f8065813
RK
455 default 100
456
704bdda0
NP
457config AEABI
458 bool "Use the ARM EABI to compile the kernel"
459 help
460 This option allows for the kernel to be compiled using the latest
461 ARM ABI (aka EABI). This is only useful if you are using a user
462 space environment that is also compiled with EABI.
463
464 Since there are major incompatibilities between the legacy ABI and
465 EABI, especially with regard to structure member alignment, this
466 option also changes the kernel syscall calling convention to
467 disambiguate both ABIs and allow for backward compatibility support
468 (selected with CONFIG_OABI_COMPAT).
469
470 To use this you need GCC version 4.0.0 or later.
471
6c90c872 472config OABI_COMPAT
a73a3ff1 473 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
61c484d4 474 depends on AEABI && EXPERIMENTAL
6c90c872
NP
475 default y
476 help
477 This option preserves the old syscall interface along with the
478 new (ARM EABI) one. It also provides a compatibility layer to
479 intercept syscalls that have structure arguments which layout
480 in memory differs between the legacy ABI and the new ARM EABI
481 (only for non "thumb" binaries). This option adds a tiny
482 overhead to all syscalls and produces a slightly larger kernel.
483 If you know you'll be using only pure EABI user space then you
484 can say N here. If this option is not selected and you attempt
485 to execute a legacy ABI binary then the result will be
486 UNPREDICTABLE (in fact it can be predicted that it won't work
487 at all). If in doubt say Y.
488
3f22ab27 489config ARCH_DISCONTIGMEM_ENABLE
1da177e4 490 bool
f7e68bbf 491 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
1da177e4
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492 help
493 Say Y to support efficient handling of discontiguous physical memory,
494 for architectures which are either NUMA (Non-Uniform Memory Access)
495 or have huge holes in the physical address space for other reasons.
496 See <file:Documentation/vm/numa> for more.
497
3f22ab27
DH
498source "mm/Kconfig"
499
1da177e4
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500config LEDS
501 bool "Timer and CPU usage LEDs"
502 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
503 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
504 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
505 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
73a59c1c
SP
506 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
507 ARCH_AT91RM9200
1da177e4
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508 help
509 If you say Y here, the LEDs on your machine will be used
510 to provide useful information about your current system status.
511
512 If you are compiling a kernel for a NetWinder or EBSA-285, you will
513 be able to select which LEDs are active using the options below. If
514 you are compiling a kernel for the EBSA-110 or the LART however, the
515 red LED will simply flash regularly to indicate that the system is
516 still functional. It is safe to say Y here if you have a CATS
517 system, but the driver will do nothing.
518
519config LEDS_TIMER
520 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
521 MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
522 depends on LEDS
523 default y if ARCH_EBSA110
524 help
525 If you say Y here, one of the system LEDs (the green one on the
526 NetWinder, the amber one on the EBSA285, or the red one on the LART)
527 will flash regularly to indicate that the system is still
528 operational. This is mainly useful to kernel hackers who are
529 debugging unstable kernels.
530
531 The LART uses the same LED for both Timer LED and CPU usage LED
532 functions. You may choose to use both, but the Timer LED function
533 will overrule the CPU usage LED.
534
535config LEDS_CPU
536 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
537 !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
538 depends on LEDS
539 help
540 If you say Y here, the red LED will be used to give a good real
541 time indication of CPU usage, by lighting whenever the idle task
542 is not currently executing.
543
544 The LART uses the same LED for both Timer LED and CPU usage LED
545 functions. You may choose to use both, but the Timer LED function
546 will overrule the CPU usage LED.
547
548config ALIGNMENT_TRAP
549 bool
550 default y if !ARCH_EBSA110
551 help
552 ARM processors can not fetch/store information which is not
553 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
554 address divisible by 4. On 32-bit ARM processors, these non-aligned
555 fetch/store instructions will be emulated in software if you say
556 here, which has a severe performance impact. This is necessary for
557 correct operation of some network protocols. With an IP-only
558 configuration it is safe to say N, otherwise say Y.
559
560endmenu
561
562menu "Boot options"
563
564# Compressed boot loader in ROM. Yes, we really want to ask about
565# TEXT and BSS so we preserve their values in the config files.
566config ZBOOT_ROM_TEXT
567 hex "Compressed ROM boot loader base address"
568 default "0"
569 help
570 The physical address at which the ROM-able zImage is to be
571 placed in the target. Platforms which normally make use of
572 ROM-able zImage formats normally set this to a suitable
573 value in their defconfig file.
574
575 If ZBOOT_ROM is not enabled, this has no effect.
576
577config ZBOOT_ROM_BSS
578 hex "Compressed ROM boot loader BSS address"
579 default "0"
580 help
581 The base address of 64KiB of read/write memory in the target
582 for the ROM-able zImage, which must be available while the
583 decompressor is running. Platforms which normally make use of
584 ROM-able zImage formats normally set this to a suitable
585 value in their defconfig file.
586
587 If ZBOOT_ROM is not enabled, this has no effect.
588
589config ZBOOT_ROM
590 bool "Compressed boot loader in ROM/flash"
591 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
592 help
593 Say Y here if you intend to execute your compressed kernel image
594 (zImage) directly from ROM or flash. If unsure, say N.
595
596config CMDLINE
597 string "Default kernel command string"
598 default ""
599 help
600 On some architectures (EBSA110 and CATS), there is currently no way
601 for the boot loader to pass arguments to the kernel. For these
602 architectures, you should supply some command-line options at build
603 time by entering them here. As a minimum, you should specify the
604 memory size and the root device (e.g., mem=64M root=/dev/nfs).
605
606config XIP_KERNEL
607 bool "Kernel Execute-In-Place from ROM"
608 depends on !ZBOOT_ROM
609 help
610 Execute-In-Place allows the kernel to run from non-volatile storage
611 directly addressable by the CPU, such as NOR flash. This saves RAM
612 space since the text section of the kernel is not loaded from flash
613 to RAM. Read-write sections, such as the data section and stack,
614 are still copied to RAM. The XIP kernel is not compressed since
615 it has to run directly from flash, so it will take more space to
616 store it. The flash address used to link the kernel object files,
617 and for storing it, is configuration dependent. Therefore, if you
618 say Y here, you must know the proper physical address where to
619 store the kernel image depending on your own flash memory usage.
620
621 Also note that the make target becomes "make xipImage" rather than
622 "make zImage" or "make Image". The final kernel binary to put in
623 ROM memory will be arch/arm/boot/xipImage.
624
625 If unsure, say N.
626
627config XIP_PHYS_ADDR
628 hex "XIP Kernel Physical Location"
629 depends on XIP_KERNEL
630 default "0x00080000"
631 help
632 This is the physical address in your flash memory the kernel will
633 be linked for and stored to. This address is dependent on your
634 own flash usage.
635
636endmenu
637
ec6bced6 638if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP1)
1da177e4
LT
639
640menu "CPU Frequency scaling"
641
642source "drivers/cpufreq/Kconfig"
643
644config CPU_FREQ_SA1100
645 bool
07c6d48f 646 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1da177e4
LT
647 default y
648
649config CPU_FREQ_SA1110
650 bool
651 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
652 default y
653
654config CPU_FREQ_INTEGRATOR
655 tristate "CPUfreq driver for ARM Integrator CPUs"
656 depends on ARCH_INTEGRATOR && CPU_FREQ
657 default y
658 help
659 This enables the CPUfreq driver for ARM Integrator CPUs.
660
661 For details, take a look at <file:Documentation/cpu-freq>.
662
663 If in doubt, say Y.
664
665endmenu
666
667endif
668
669menu "Floating point emulation"
670
671comment "At least one emulation must be selected"
672
673config FPE_NWFPE
674 bool "NWFPE math emulation"
8993a44c 675 depends on !AEABI || OABI_COMPAT
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LT
676 ---help---
677 Say Y to include the NWFPE floating point emulator in the kernel.
678 This is necessary to run most binaries. Linux does not currently
679 support floating point hardware so you need to say Y here even if
680 your machine has an FPA or floating point co-processor podule.
681
682 You may say N here if you are going to load the Acorn FPEmulator
683 early in the bootup.
684
685config FPE_NWFPE_XP
686 bool "Support extended precision"
bedf142b 687 depends on FPE_NWFPE
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LT
688 help
689 Say Y to include 80-bit support in the kernel floating-point
690 emulator. Otherwise, only 32 and 64-bit support is compiled in.
691 Note that gcc does not generate 80-bit operations by default,
692 so in most cases this option only enlarges the size of the
693 floating point emulator without any good reason.
694
695 You almost surely want to say N here.
696
697config FPE_FASTFPE
698 bool "FastFPE math emulation (EXPERIMENTAL)"
8993a44c 699 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
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LT
700 ---help---
701 Say Y here to include the FAST floating point emulator in the kernel.
702 This is an experimental much faster emulator which now also has full
703 precision for the mantissa. It does not support any exceptions.
704 It is very simple, and approximately 3-6 times faster than NWFPE.
705
706 It should be sufficient for most programs. It may be not suitable
707 for scientific calculations, but you have to check this for yourself.
708 If you do not feel you need a faster FP emulation you should better
709 choose NWFPE.
710
711config VFP
712 bool "VFP-format floating point maths"
713 depends on CPU_V6 || CPU_ARM926T
714 help
715 Say Y to include VFP support code in the kernel. This is needed
716 if your hardware includes a VFP unit.
717
718 Please see <file:Documentation/arm/VFP/release-notes.txt> for
719 release notes and additional status information.
720
721 Say N if your target does not have VFP hardware.
722
723endmenu
724
725menu "Userspace binary formats"
726
727source "fs/Kconfig.binfmt"
728
729config ARTHUR
730 tristate "RISC OS personality"
704bdda0 731 depends on !AEABI
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LT
732 help
733 Say Y here to include the kernel code necessary if you want to run
734 Acorn RISC OS/Arthur binaries under Linux. This code is still very
735 experimental; if this sounds frightening, say N and sleep in peace.
736 You can also say M here to compile this support as a module (which
737 will be called arthur).
738
739endmenu
740
741menu "Power management options"
742
eceab4ac 743source "kernel/power/Kconfig"
1da177e4 744
1da177e4
LT
745config APM
746 tristate "Advanced Power Management Emulation"
1da177e4
LT
747 ---help---
748 APM is a BIOS specification for saving power using several different
749 techniques. This is mostly useful for battery powered laptops with
750 APM compliant BIOSes. If you say Y here, the system time will be
751 reset after a RESUME operation, the /proc/apm device will provide
752 battery status information, and user-space programs will receive
753 notification of APM "events" (e.g. battery status change).
754
1da177e4
LT
755 In order to use APM, you will need supporting software. For location
756 and more information, read <file:Documentation/pm.txt> and the
757 Battery Powered Linux mini-HOWTO, available from
758 <http://www.tldp.org/docs.html#howto>.
759
760 This driver does not spin down disk drives (see the hdparm(8)
761 manpage ("man 8 hdparm") for that), and it doesn't turn off
762 VESA-compliant "green" monitors.
763
1da177e4
LT
764 Generally, if you don't have a battery in your machine, there isn't
765 much point in using this driver and you should say N. If you get
766 random kernel OOPSes or reboots that don't seem to be related to
767 anything, try disabling/enabling this option (or disabling/enabling
768 APM in your BIOS).
769
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LT
770endmenu
771
d5950b43
SR
772source "net/Kconfig"
773
1da177e4
LT
774menu "Device Drivers"
775
776source "drivers/base/Kconfig"
777
c35bf4a5
PM
778source "drivers/connector/Kconfig"
779
1da177e4
LT
780if ALIGNMENT_TRAP
781source "drivers/mtd/Kconfig"
782endif
783
784source "drivers/parport/Kconfig"
785
786source "drivers/pnp/Kconfig"
787
788source "drivers/block/Kconfig"
789
790source "drivers/acorn/block/Kconfig"
791
bb011b8e
DB
792if PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \
793 || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
d56c524a 794 || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE
1da177e4
LT
795source "drivers/ide/Kconfig"
796endif
797
798source "drivers/scsi/Kconfig"
799
800source "drivers/md/Kconfig"
801
802source "drivers/message/fusion/Kconfig"
803
804source "drivers/ieee1394/Kconfig"
805
806source "drivers/message/i2o/Kconfig"
807
d5950b43 808source "drivers/net/Kconfig"
1da177e4
LT
809
810source "drivers/isdn/Kconfig"
811
812# input before char - char/joystick depends on it. As does USB.
813
814source "drivers/input/Kconfig"
815
816source "drivers/char/Kconfig"
817
818source "drivers/i2c/Kconfig"
819
8ae12a0d
DB
820source "drivers/spi/Kconfig"
821
04916c0e
AZ
822source "drivers/w1/Kconfig"
823
ad2f931d
JD
824source "drivers/hwmon/Kconfig"
825
1da177e4
LT
826#source "drivers/l3/Kconfig"
827
828source "drivers/misc/Kconfig"
829
a4e137ab
RK
830source "drivers/mfd/Kconfig"
831
1da177e4
LT
832source "drivers/media/Kconfig"
833
834source "drivers/video/Kconfig"
835
836source "sound/Kconfig"
837
838source "drivers/usb/Kconfig"
839
840source "drivers/mmc/Kconfig"
841
842endmenu
843
844source "fs/Kconfig"
845
846source "arch/arm/oprofile/Kconfig"
847
848source "arch/arm/Kconfig.debug"
849
850source "security/Kconfig"
851
852source "crypto/Kconfig"
853
854source "lib/Kconfig"