blob: ec77721507cb746c238afe4d4ed56a62b97f4b38 [file] [log] [blame]
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
11 help
12 The ARM series is a line of low-power-consumption RISC chip designs
13 licensed by ARM ltd and targeted at embedded applications and
14 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
15 manufactured, but legacy ARM-based PC hardware remains popular in
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
49config UID16
50 bool
51 default y
52
53config RWSEM_GENERIC_SPINLOCK
54 bool
55 default y
56
57config RWSEM_XCHGADD_ALGORITHM
58 bool
59
60config GENERIC_CALIBRATE_DELAY
61 bool
62 default y
63
64config GENERIC_BUST_SPINLOCK
65 bool
66
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +010067config ARCH_MAY_HAVE_PC_FDC
68 bool
69
Linus Torvalds1da177e2005-04-16 15:20:36 -070070config GENERIC_ISA_DMA
71 bool
72
Linus Torvalds1da177e2005-04-16 15:20:36 -070073config FIQ
74 bool
75
76source "init/Kconfig"
77
78menu "System Type"
79
80choice
81 prompt "ARM system type"
82 default ARCH_RPC
83
84config ARCH_CLPS7500
85 bool "Cirrus-CL-PS7500FE"
86 select TIMER_ACORN
Russell Kingf7e68bb2005-05-05 14:49:01 +010087 select ISA
Linus Torvalds1da177e2005-04-16 15:20:36 -070088
89config ARCH_CLPS711X
90 bool "CLPS711x/EP721x-based"
91
92config ARCH_CO285
93 bool "Co-EBSA285"
94 select FOOTBRIDGE
95 select FOOTBRIDGE_ADDIN
96
97config ARCH_EBSA110
98 bool "EBSA-110"
Russell Kingf7e68bb2005-05-05 14:49:01 +010099 select ISA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 help
101 This is an evaluation board for the StrongARM processor available
102 from Digital. It has limited hardware on-board, including an onboard
103 Ethernet interface, two PCMCIA sockets, two serial ports and a
104 parallel port.
105
106config ARCH_CAMELOT
107 bool "Epxa10db"
108 help
109 This enables support for Altera's Excalibur XA10 development board.
110 If you would like to build your kernel to run on one of these boards
111 then you must say 'Y' here. Otherwise say 'N'
112
113config ARCH_FOOTBRIDGE
114 bool "FootBridge"
115 select FOOTBRIDGE
116
117config ARCH_INTEGRATOR
118 bool "Integrator"
119 select ARM_AMBA
120 select ICST525
121
122config ARCH_IOP3XX
123 bool "IOP3xx-based"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100124 select PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
126config ARCH_IXP4XX
127 bool "IXP4xx-based"
128 select DMABOUNCE
Russell Kingf7e68bb2005-05-05 14:49:01 +0100129 select PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
131config ARCH_IXP2000
132 bool "IXP2400/2800-based"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100133 select PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
135config ARCH_L7200
136 bool "LinkUp-L7200"
137 select FIQ
138 help
139 Say Y here if you intend to run this kernel on a LinkUp Systems
140 L7200 Software Development Board which uses an ARM720T processor.
141 Information on this board can be obtained at:
142
143 <http://www.linkupsys.com/>
144
145 If you have any questions or comments about the Linux kernel port
146 to this board, send e-mail to <sjhill@cotw.com>.
147
148config ARCH_PXA
149 bool "PXA2xx-based"
150
151config ARCH_RPC
152 bool "RiscPC"
153 select ARCH_ACORN
154 select FIQ
155 select TIMER_ACORN
viro@ZenIV.linux.org.uka08b6b72005-09-06 01:48:42 +0100156 select ARCH_MAY_HAVE_PC_FDC
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 help
158 On the Acorn Risc-PC, Linux can support the internal IDE disk and
159 CD-ROM interface, serial and parallel port, and the floppy drive.
160
161config ARCH_SA1100
162 bool "SA1100-based"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100163 select ISA
Russell King3cd9e192005-06-25 19:29:34 +0100164 select ARCH_DISCONTIGMEM_ENABLE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
166config ARCH_S3C2410
167 bool "Samsung S3C2410"
168 help
169 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
170 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
171 the Samsung SMDK2410 development board (and derviatives).
172
173config ARCH_SHARK
174 bool "Shark"
Russell Kingf7e68bb2005-05-05 14:49:01 +0100175 select ISA
176 select ISA_DMA
177 select PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178
179config ARCH_LH7A40X
180 bool "Sharp LH7A40X"
181 help
182 Say Y here for systems based on one of the Sharp LH7A40X
183 System on a Chip processors. These CPUs include an ARM922T
184 core with a wide array of integrated devices for
185 hand-held and low-power applications.
186
187config ARCH_OMAP
188 bool "TI OMAP"
189
190config ARCH_VERSATILE
191 bool "Versatile"
192 select ARM_AMBA
193 select ICST307
194 help
195 This enables support for ARM Ltd Versatile board.
196
Catalin Marinas8ad68bb2005-10-31 14:25:02 +0000197config ARCH_REALVIEW
198 bool "RealView"
199 select ARM_AMBA
200 select ICST307
201 help
202 This enables support for ARM Ltd RealView boards.
203
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204config ARCH_IMX
205 bool "IMX"
206
207config ARCH_H720X
208 bool "Hynix-HMS720x-based"
209 help
210 This enables support for systems based on the Hynix HMS720x
211
Bellido Nicolas038c5b62005-06-20 18:51:05 +0100212config ARCH_AAEC2000
213 bool "Agilent AAEC-2000 based"
Bellido Nicolas049eb322005-10-28 16:51:44 +0100214 select ARM_AMBA
Bellido Nicolas038c5b62005-06-20 18:51:05 +0100215 help
216 This enables support for systems based on the Agilent AAEC-2000
217
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218endchoice
219
220source "arch/arm/mach-clps711x/Kconfig"
221
222source "arch/arm/mach-epxa10db/Kconfig"
223
224source "arch/arm/mach-footbridge/Kconfig"
225
226source "arch/arm/mach-integrator/Kconfig"
227
228source "arch/arm/mach-iop3xx/Kconfig"
229
230source "arch/arm/mach-ixp4xx/Kconfig"
231
232source "arch/arm/mach-ixp2000/Kconfig"
233
234source "arch/arm/mach-pxa/Kconfig"
235
236source "arch/arm/mach-sa1100/Kconfig"
237
Tony Lindgrend48af152005-07-10 19:58:17 +0100238source "arch/arm/plat-omap/Kconfig"
239
240source "arch/arm/mach-omap1/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
242source "arch/arm/mach-s3c2410/Kconfig"
243
244source "arch/arm/mach-lh7a40x/Kconfig"
245
246source "arch/arm/mach-imx/Kconfig"
247
248source "arch/arm/mach-h720x/Kconfig"
249
250source "arch/arm/mach-versatile/Kconfig"
251
Bellido Nicolas038c5b62005-06-20 18:51:05 +0100252source "arch/arm/mach-aaec2000/Kconfig"
253
Catalin Marinas8ad68bb2005-10-31 14:25:02 +0000254source "arch/arm/mach-realview/Kconfig"
255
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256# Definitions to make life easier
257config ARCH_ACORN
258 bool
259
260source arch/arm/mm/Kconfig
261
262# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
263config XSCALE_PMU
264 bool
265 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
266 default y
267
268endmenu
269
270source "arch/arm/common/Kconfig"
271
272config FORCE_MAX_ZONEORDER
273 int
274 depends on SA1111
275 default "9"
276
277menu "Bus support"
278
279config ARM_AMBA
280 bool
281
282config ISA
283 bool
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 help
285 Find out whether you have ISA slots on your motherboard. ISA is the
286 name of a bus system, i.e. the way the CPU talks to the other stuff
287 inside your box. Other bus systems are PCI, EISA, MicroChannel
288 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
289 newer boards don't support it. If you have ISA, say Y, otherwise N.
290
291config ISA_DMA
292 bool
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293
Al Viro5cae8412005-05-04 05:39:22 +0100294config ISA_DMA_API
295 bool
296 default y
297
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298config PCI
Catalin Marinasc0da0852005-06-20 18:51:06 +0100299 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 help
301 Find out whether you have a PCI motherboard. PCI is the name of a
302 bus system, i.e. the way the CPU talks to the other stuff inside
303 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
304 VESA. If you have PCI, say Y, otherwise N.
305
306 The PCI-HOWTO, available from
307 <http://www.tldp.org/docs.html#howto>, contains valuable
308 information about which PCI hardware does work under Linux and which
309 doesn't.
310
311# Select the host bridge type
312config PCI_HOST_VIA82C505
313 bool
314 depends on PCI && ARCH_SHARK
315 default y
316
317source "drivers/pci/Kconfig"
318
319source "drivers/pcmcia/Kconfig"
320
321endmenu
322
323menu "Kernel Features"
324
325config SMP
326 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
Russell Kingf6db4492005-11-07 21:30:21 +0000327 depends on EXPERIMENTAL && REALVIEW_MPCORE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 help
329 This enables support for systems with more than one CPU. If you have
330 a system with only one CPU, like most personal computers, say N. If
331 you have a system with more than one CPU, say Y.
332
333 If you say N here, the kernel will run on single and multiprocessor
334 machines, but will use only one CPU of a multiprocessor machine. If
335 you say Y here, the kernel will run on many, but not all, single
336 processor machines. On a single processor machine, the kernel will
337 run faster if you say N here.
338
Arthur Othieno12c62c22005-09-10 00:26:22 -0700339 See also the <file:Documentation/smp.txt>,
340 <file:Documentation/i386/IO-APIC.txt>,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
342 <http://www.linuxdoc.org/docs.html#howto>.
343
344 If you don't know what to do here, say N.
345
346config NR_CPUS
347 int "Maximum number of CPUs (2-32)"
348 range 2 32
349 depends on SMP
350 default "4"
351
Russell Kinga054a812005-11-02 22:24:33 +0000352config HOTPLUG_CPU
353 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
354 depends on SMP && HOTPLUG && EXPERIMENTAL
355 help
356 Say Y here to experiment with turning CPUs off and on. CPUs
357 can be controlled through /sys/devices/system/cpu.
358
Russell King37ee16a2005-11-08 19:08:05 +0000359config LOCAL_TIMERS
360 bool "Use local timer interrupts"
Russell King2a98beb2005-11-09 10:50:29 +0000361 depends on SMP && REALVIEW_MPCORE
Russell King37ee16a2005-11-08 19:08:05 +0000362 default y
363 help
364 Enable support for local timers on SMP platforms, rather then the
365 legacy IPI broadcast method. Local timers allows the system
366 accounting to be spread across the timer interval, preventing a
367 "thundering herd" at every timer tick.
368
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369config PREEMPT
370 bool "Preemptible Kernel (EXPERIMENTAL)"
371 depends on EXPERIMENTAL
372 help
373 This option reduces the latency of the kernel when reacting to
374 real-time or interactive events by allowing a low priority process to
375 be preempted even if it is in kernel mode executing a system call.
376 This allows applications to run more reliably even when the system is
377 under load.
378
379 Say Y here if you are building a kernel for a desktop, embedded
380 or real-time system. Say N if you are unsure.
381
Russell King8749af62005-06-25 19:39:45 +0100382config NO_IDLE_HZ
383 bool "Dynamic tick timer"
384 help
385 Select this option if you want to disable continuous timer ticks
386 and have them programmed to occur as required. This option saves
387 power as the system can remain in idle state for longer.
388
389 By default dynamic tick is disabled during the boot, and can be
390 manually enabled with:
391
392 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
393
394 Alternatively, if you want dynamic tick automatically enabled
395 during boot, pass "dyntick=enable" via the kernel command string.
396
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100397 Please note that dynamic tick may affect the accuracy of
398 timekeeping on some platforms depending on the implementation.
Nicolas Pitre569d2c32005-09-01 12:48:48 +0100399 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
400 to have accurate timekeeping with dynamic tick.
Tony Lindgrenf2be64b2005-06-28 21:01:16 +0100401
Dave Hansen3f22ab22005-06-23 00:07:43 -0700402config ARCH_DISCONTIGMEM_ENABLE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 bool
Russell Kingf7e68bb2005-05-05 14:49:01 +0100404 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 help
406 Say Y to support efficient handling of discontiguous physical memory,
407 for architectures which are either NUMA (Non-Uniform Memory Access)
408 or have huge holes in the physical address space for other reasons.
409 See <file:Documentation/vm/numa> for more.
410
Dave Hansen3f22ab22005-06-23 00:07:43 -0700411source "mm/Kconfig"
412
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413config LEDS
414 bool "Timer and CPU usage LEDs"
415 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
416 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
417 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
418 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
419 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE
420 help
421 If you say Y here, the LEDs on your machine will be used
422 to provide useful information about your current system status.
423
424 If you are compiling a kernel for a NetWinder or EBSA-285, you will
425 be able to select which LEDs are active using the options below. If
426 you are compiling a kernel for the EBSA-110 or the LART however, the
427 red LED will simply flash regularly to indicate that the system is
428 still functional. It is safe to say Y here if you have a CATS
429 system, but the driver will do nothing.
430
431config LEDS_TIMER
432 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
433 MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
434 depends on LEDS
435 default y if ARCH_EBSA110
436 help
437 If you say Y here, one of the system LEDs (the green one on the
438 NetWinder, the amber one on the EBSA285, or the red one on the LART)
439 will flash regularly to indicate that the system is still
440 operational. This is mainly useful to kernel hackers who are
441 debugging unstable kernels.
442
443 The LART uses the same LED for both Timer LED and CPU usage LED
444 functions. You may choose to use both, but the Timer LED function
445 will overrule the CPU usage LED.
446
447config LEDS_CPU
448 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
449 !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
450 depends on LEDS
451 help
452 If you say Y here, the red LED will be used to give a good real
453 time indication of CPU usage, by lighting whenever the idle task
454 is not currently executing.
455
456 The LART uses the same LED for both Timer LED and CPU usage LED
457 functions. You may choose to use both, but the Timer LED function
458 will overrule the CPU usage LED.
459
460config ALIGNMENT_TRAP
461 bool
462 default y if !ARCH_EBSA110
463 help
464 ARM processors can not fetch/store information which is not
465 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
466 address divisible by 4. On 32-bit ARM processors, these non-aligned
467 fetch/store instructions will be emulated in software if you say
468 here, which has a severe performance impact. This is necessary for
469 correct operation of some network protocols. With an IP-only
470 configuration it is safe to say N, otherwise say Y.
471
472endmenu
473
474menu "Boot options"
475
476# Compressed boot loader in ROM. Yes, we really want to ask about
477# TEXT and BSS so we preserve their values in the config files.
478config ZBOOT_ROM_TEXT
479 hex "Compressed ROM boot loader base address"
480 default "0"
481 help
482 The physical address at which the ROM-able zImage is to be
483 placed in the target. Platforms which normally make use of
484 ROM-able zImage formats normally set this to a suitable
485 value in their defconfig file.
486
487 If ZBOOT_ROM is not enabled, this has no effect.
488
489config ZBOOT_ROM_BSS
490 hex "Compressed ROM boot loader BSS address"
491 default "0"
492 help
493 The base address of 64KiB of read/write memory in the target
494 for the ROM-able zImage, which must be available while the
495 decompressor is running. Platforms which normally make use of
496 ROM-able zImage formats normally set this to a suitable
497 value in their defconfig file.
498
499 If ZBOOT_ROM is not enabled, this has no effect.
500
501config ZBOOT_ROM
502 bool "Compressed boot loader in ROM/flash"
503 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
504 help
505 Say Y here if you intend to execute your compressed kernel image
506 (zImage) directly from ROM or flash. If unsure, say N.
507
508config CMDLINE
509 string "Default kernel command string"
510 default ""
511 help
512 On some architectures (EBSA110 and CATS), there is currently no way
513 for the boot loader to pass arguments to the kernel. For these
514 architectures, you should supply some command-line options at build
515 time by entering them here. As a minimum, you should specify the
516 memory size and the root device (e.g., mem=64M root=/dev/nfs).
517
518config XIP_KERNEL
519 bool "Kernel Execute-In-Place from ROM"
520 depends on !ZBOOT_ROM
521 help
522 Execute-In-Place allows the kernel to run from non-volatile storage
523 directly addressable by the CPU, such as NOR flash. This saves RAM
524 space since the text section of the kernel is not loaded from flash
525 to RAM. Read-write sections, such as the data section and stack,
526 are still copied to RAM. The XIP kernel is not compressed since
527 it has to run directly from flash, so it will take more space to
528 store it. The flash address used to link the kernel object files,
529 and for storing it, is configuration dependent. Therefore, if you
530 say Y here, you must know the proper physical address where to
531 store the kernel image depending on your own flash memory usage.
532
533 Also note that the make target becomes "make xipImage" rather than
534 "make zImage" or "make Image". The final kernel binary to put in
535 ROM memory will be arch/arm/boot/xipImage.
536
537 If unsure, say N.
538
539config XIP_PHYS_ADDR
540 hex "XIP Kernel Physical Location"
541 depends on XIP_KERNEL
542 default "0x00080000"
543 help
544 This is the physical address in your flash memory the kernel will
545 be linked for and stored to. This address is dependent on your
546 own flash usage.
547
548endmenu
549
Tony Lindgrenec6bced2005-07-10 19:58:20 +0100550if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551
552menu "CPU Frequency scaling"
553
554source "drivers/cpufreq/Kconfig"
555
556config CPU_FREQ_SA1100
557 bool
Vincent Sanders07c6d482005-06-09 21:59:22 +0100558 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 -0700559 default y
560
561config CPU_FREQ_SA1110
562 bool
563 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
564 default y
565
566config CPU_FREQ_INTEGRATOR
567 tristate "CPUfreq driver for ARM Integrator CPUs"
568 depends on ARCH_INTEGRATOR && CPU_FREQ
569 default y
570 help
571 This enables the CPUfreq driver for ARM Integrator CPUs.
572
573 For details, take a look at <file:Documentation/cpu-freq>.
574
575 If in doubt, say Y.
576
577endmenu
578
579endif
580
581menu "Floating point emulation"
582
583comment "At least one emulation must be selected"
584
585config FPE_NWFPE
586 bool "NWFPE math emulation"
587 ---help---
588 Say Y to include the NWFPE floating point emulator in the kernel.
589 This is necessary to run most binaries. Linux does not currently
590 support floating point hardware so you need to say Y here even if
591 your machine has an FPA or floating point co-processor podule.
592
593 You may say N here if you are going to load the Acorn FPEmulator
594 early in the bootup.
595
596config FPE_NWFPE_XP
597 bool "Support extended precision"
Lennert Buytenhekbedf1422005-11-07 21:12:08 +0000598 depends on FPE_NWFPE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 help
600 Say Y to include 80-bit support in the kernel floating-point
601 emulator. Otherwise, only 32 and 64-bit support is compiled in.
602 Note that gcc does not generate 80-bit operations by default,
603 so in most cases this option only enlarges the size of the
604 floating point emulator without any good reason.
605
606 You almost surely want to say N here.
607
608config FPE_FASTFPE
609 bool "FastFPE math emulation (EXPERIMENTAL)"
610 depends on !CPU_32v3 && EXPERIMENTAL
611 ---help---
612 Say Y here to include the FAST floating point emulator in the kernel.
613 This is an experimental much faster emulator which now also has full
614 precision for the mantissa. It does not support any exceptions.
615 It is very simple, and approximately 3-6 times faster than NWFPE.
616
617 It should be sufficient for most programs. It may be not suitable
618 for scientific calculations, but you have to check this for yourself.
619 If you do not feel you need a faster FP emulation you should better
620 choose NWFPE.
621
622config VFP
623 bool "VFP-format floating point maths"
624 depends on CPU_V6 || CPU_ARM926T
625 help
626 Say Y to include VFP support code in the kernel. This is needed
627 if your hardware includes a VFP unit.
628
629 Please see <file:Documentation/arm/VFP/release-notes.txt> for
630 release notes and additional status information.
631
632 Say N if your target does not have VFP hardware.
633
634endmenu
635
636menu "Userspace binary formats"
637
638source "fs/Kconfig.binfmt"
639
640config ARTHUR
641 tristate "RISC OS personality"
642 help
643 Say Y here to include the kernel code necessary if you want to run
644 Acorn RISC OS/Arthur binaries under Linux. This code is still very
645 experimental; if this sounds frightening, say N and sleep in peace.
646 You can also say M here to compile this support as a module (which
647 will be called arthur).
648
649endmenu
650
651menu "Power management options"
652
653config PM
654 bool "Power Management support"
655 ---help---
656 "Power Management" means that parts of your computer are shut
657 off or put into a power conserving "sleep" mode if they are not
658 being used. There are two competing standards for doing this: APM
659 and ACPI. If you want to use either one, say Y here and then also
660 to the requisite support below.
661
662 Power Management is most important for battery powered laptop
663 computers; if you have a laptop, check out the Linux Laptop home
664 page on the WWW at <http://www.linux-on-laptops.com/> or
665 Tuxmobil - Linux on Mobile Computers at <http://www.tuxmobil.org/>
666 and the Battery Powered Linux mini-HOWTO, available from
667 <http://www.tldp.org/docs.html#howto>.
668
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669config APM
670 tristate "Advanced Power Management Emulation"
671 depends on PM
672 ---help---
673 APM is a BIOS specification for saving power using several different
674 techniques. This is mostly useful for battery powered laptops with
675 APM compliant BIOSes. If you say Y here, the system time will be
676 reset after a RESUME operation, the /proc/apm device will provide
677 battery status information, and user-space programs will receive
678 notification of APM "events" (e.g. battery status change).
679
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 In order to use APM, you will need supporting software. For location
681 and more information, read <file:Documentation/pm.txt> and the
682 Battery Powered Linux mini-HOWTO, available from
683 <http://www.tldp.org/docs.html#howto>.
684
685 This driver does not spin down disk drives (see the hdparm(8)
686 manpage ("man 8 hdparm") for that), and it doesn't turn off
687 VESA-compliant "green" monitors.
688
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 Generally, if you don't have a battery in your machine, there isn't
690 much point in using this driver and you should say N. If you get
691 random kernel OOPSes or reboots that don't seem to be related to
692 anything, try disabling/enabling this option (or disabling/enabling
693 APM in your BIOS).
694
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695endmenu
696
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700697source "net/Kconfig"
698
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699menu "Device Drivers"
700
701source "drivers/base/Kconfig"
702
703if ALIGNMENT_TRAP
704source "drivers/mtd/Kconfig"
705endif
706
707source "drivers/parport/Kconfig"
708
709source "drivers/pnp/Kconfig"
710
711source "drivers/block/Kconfig"
712
713source "drivers/acorn/block/Kconfig"
714
David Brownellbb011b82005-06-12 23:26:05 +0100715if PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \
716 || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
Russell Kingd56c5242005-11-04 17:28:34 +0000717 || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718source "drivers/ide/Kconfig"
719endif
720
721source "drivers/scsi/Kconfig"
722
723source "drivers/md/Kconfig"
724
725source "drivers/message/fusion/Kconfig"
726
727source "drivers/ieee1394/Kconfig"
728
729source "drivers/message/i2o/Kconfig"
730
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700731source "drivers/net/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732
733source "drivers/isdn/Kconfig"
734
735# input before char - char/joystick depends on it. As does USB.
736
737source "drivers/input/Kconfig"
738
739source "drivers/char/Kconfig"
740
741source "drivers/i2c/Kconfig"
742
Jean Delvaread2f9312005-07-02 18:15:49 +0200743source "drivers/hwmon/Kconfig"
744
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745#source "drivers/l3/Kconfig"
746
747source "drivers/misc/Kconfig"
748
Russell Kinga4e137a2005-08-18 10:06:59 +0100749source "drivers/mfd/Kconfig"
750
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751source "drivers/media/Kconfig"
752
753source "drivers/video/Kconfig"
754
755source "sound/Kconfig"
756
757source "drivers/usb/Kconfig"
758
759source "drivers/mmc/Kconfig"
760
761endmenu
762
763source "fs/Kconfig"
764
765source "arch/arm/oprofile/Kconfig"
766
767source "arch/arm/Kconfig.debug"
768
769source "security/Kconfig"
770
771source "crypto/Kconfig"
772
773source "lib/Kconfig"