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1da177e4 LT |
1 | # |
2 | # For a description of the syntax of this configuration file, | |
3 | # see Documentation/kbuild/kconfig-language.txt. | |
4 | # | |
5 | ||
6 | mainmenu "Linux Kernel Configuration" | |
7 | ||
8 | config 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 | ||
19 | config MMU | |
20 | bool | |
21 | default y | |
22 | ||
23 | config 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 | ||
38 | config SBUS | |
39 | bool | |
40 | ||
41 | config 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 | ||
49 | config UID16 | |
50 | bool | |
51 | default y | |
52 | ||
53 | config RWSEM_GENERIC_SPINLOCK | |
54 | bool | |
55 | default y | |
56 | ||
57 | config RWSEM_XCHGADD_ALGORITHM | |
58 | bool | |
59 | ||
60 | config GENERIC_CALIBRATE_DELAY | |
61 | bool | |
62 | default y | |
63 | ||
64 | config GENERIC_BUST_SPINLOCK | |
65 | bool | |
66 | ||
67 | config GENERIC_ISA_DMA | |
68 | bool | |
69 | ||
1da177e4 LT |
70 | config FIQ |
71 | bool | |
72 | ||
73 | source "init/Kconfig" | |
74 | ||
75 | menu "System Type" | |
76 | ||
77 | choice | |
78 | prompt "ARM system type" | |
79 | default ARCH_RPC | |
80 | ||
81 | config ARCH_CLPS7500 | |
82 | bool "Cirrus-CL-PS7500FE" | |
83 | select TIMER_ACORN | |
f7e68bbf | 84 | select ISA |
1da177e4 LT |
85 | |
86 | config ARCH_CLPS711X | |
87 | bool "CLPS711x/EP721x-based" | |
88 | ||
89 | config ARCH_CO285 | |
90 | bool "Co-EBSA285" | |
91 | select FOOTBRIDGE | |
92 | select FOOTBRIDGE_ADDIN | |
93 | ||
94 | config ARCH_EBSA110 | |
95 | bool "EBSA-110" | |
f7e68bbf | 96 | select ISA |
1da177e4 LT |
97 | help |
98 | This is an evaluation board for the StrongARM processor available | |
99 | from Digital. It has limited hardware on-board, including an onboard | |
100 | Ethernet interface, two PCMCIA sockets, two serial ports and a | |
101 | parallel port. | |
102 | ||
103 | config ARCH_CAMELOT | |
104 | bool "Epxa10db" | |
105 | help | |
106 | This enables support for Altera's Excalibur XA10 development board. | |
107 | If you would like to build your kernel to run on one of these boards | |
108 | then you must say 'Y' here. Otherwise say 'N' | |
109 | ||
110 | config ARCH_FOOTBRIDGE | |
111 | bool "FootBridge" | |
112 | select FOOTBRIDGE | |
113 | ||
114 | config ARCH_INTEGRATOR | |
115 | bool "Integrator" | |
116 | select ARM_AMBA | |
117 | select ICST525 | |
118 | ||
119 | config ARCH_IOP3XX | |
120 | bool "IOP3xx-based" | |
f7e68bbf | 121 | select PCI |
1da177e4 LT |
122 | |
123 | config ARCH_IXP4XX | |
124 | bool "IXP4xx-based" | |
125 | select DMABOUNCE | |
f7e68bbf | 126 | select PCI |
1da177e4 LT |
127 | |
128 | config ARCH_IXP2000 | |
129 | bool "IXP2400/2800-based" | |
f7e68bbf | 130 | select PCI |
1da177e4 LT |
131 | |
132 | config ARCH_L7200 | |
133 | bool "LinkUp-L7200" | |
134 | select FIQ | |
135 | help | |
136 | Say Y here if you intend to run this kernel on a LinkUp Systems | |
137 | L7200 Software Development Board which uses an ARM720T processor. | |
138 | Information on this board can be obtained at: | |
139 | ||
140 | <http://www.linkupsys.com/> | |
141 | ||
142 | If you have any questions or comments about the Linux kernel port | |
143 | to this board, send e-mail to <sjhill@cotw.com>. | |
144 | ||
145 | config ARCH_PXA | |
146 | bool "PXA2xx-based" | |
147 | ||
148 | config ARCH_RPC | |
149 | bool "RiscPC" | |
150 | select ARCH_ACORN | |
151 | select FIQ | |
152 | select TIMER_ACORN | |
153 | help | |
154 | On the Acorn Risc-PC, Linux can support the internal IDE disk and | |
155 | CD-ROM interface, serial and parallel port, and the floppy drive. | |
156 | ||
157 | config ARCH_SA1100 | |
158 | bool "SA1100-based" | |
f7e68bbf | 159 | select ISA |
3cd9e19e | 160 | select ARCH_DISCONTIGMEM_ENABLE |
1da177e4 LT |
161 | |
162 | config ARCH_S3C2410 | |
163 | bool "Samsung S3C2410" | |
164 | help | |
165 | Samsung S3C2410X CPU based systems, such as the Simtec Electronics | |
166 | BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or | |
167 | the Samsung SMDK2410 development board (and derviatives). | |
168 | ||
169 | config ARCH_SHARK | |
170 | bool "Shark" | |
f7e68bbf RK |
171 | select ISA |
172 | select ISA_DMA | |
173 | select PCI | |
1da177e4 LT |
174 | |
175 | config ARCH_LH7A40X | |
176 | bool "Sharp LH7A40X" | |
177 | help | |
178 | Say Y here for systems based on one of the Sharp LH7A40X | |
179 | System on a Chip processors. These CPUs include an ARM922T | |
180 | core with a wide array of integrated devices for | |
181 | hand-held and low-power applications. | |
182 | ||
183 | config ARCH_OMAP | |
184 | bool "TI OMAP" | |
185 | ||
186 | config ARCH_VERSATILE | |
187 | bool "Versatile" | |
188 | select ARM_AMBA | |
189 | select ICST307 | |
190 | help | |
191 | This enables support for ARM Ltd Versatile board. | |
192 | ||
193 | config ARCH_IMX | |
194 | bool "IMX" | |
195 | ||
196 | config ARCH_H720X | |
197 | bool "Hynix-HMS720x-based" | |
198 | help | |
199 | This enables support for systems based on the Hynix HMS720x | |
200 | ||
038c5b60 BN |
201 | config ARCH_AAEC2000 |
202 | bool "Agilent AAEC-2000 based" | |
203 | help | |
204 | This enables support for systems based on the Agilent AAEC-2000 | |
205 | ||
1da177e4 LT |
206 | endchoice |
207 | ||
208 | source "arch/arm/mach-clps711x/Kconfig" | |
209 | ||
210 | source "arch/arm/mach-epxa10db/Kconfig" | |
211 | ||
212 | source "arch/arm/mach-footbridge/Kconfig" | |
213 | ||
214 | source "arch/arm/mach-integrator/Kconfig" | |
215 | ||
216 | source "arch/arm/mach-iop3xx/Kconfig" | |
217 | ||
218 | source "arch/arm/mach-ixp4xx/Kconfig" | |
219 | ||
220 | source "arch/arm/mach-ixp2000/Kconfig" | |
221 | ||
222 | source "arch/arm/mach-pxa/Kconfig" | |
223 | ||
224 | source "arch/arm/mach-sa1100/Kconfig" | |
225 | ||
226 | source "arch/arm/mach-omap/Kconfig" | |
227 | ||
228 | source "arch/arm/mach-s3c2410/Kconfig" | |
229 | ||
230 | source "arch/arm/mach-lh7a40x/Kconfig" | |
231 | ||
232 | source "arch/arm/mach-imx/Kconfig" | |
233 | ||
234 | source "arch/arm/mach-h720x/Kconfig" | |
235 | ||
236 | source "arch/arm/mach-versatile/Kconfig" | |
237 | ||
038c5b60 BN |
238 | source "arch/arm/mach-aaec2000/Kconfig" |
239 | ||
1da177e4 LT |
240 | # Definitions to make life easier |
241 | config ARCH_ACORN | |
242 | bool | |
243 | ||
244 | source arch/arm/mm/Kconfig | |
245 | ||
246 | # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER | |
247 | config XSCALE_PMU | |
248 | bool | |
249 | depends on CPU_XSCALE && !XSCALE_PMU_TIMER | |
250 | default y | |
251 | ||
252 | endmenu | |
253 | ||
254 | source "arch/arm/common/Kconfig" | |
255 | ||
256 | config FORCE_MAX_ZONEORDER | |
257 | int | |
258 | depends on SA1111 | |
259 | default "9" | |
260 | ||
261 | menu "Bus support" | |
262 | ||
263 | config ARM_AMBA | |
264 | bool | |
265 | ||
266 | config ISA | |
267 | bool | |
1da177e4 LT |
268 | help |
269 | Find out whether you have ISA slots on your motherboard. ISA is the | |
270 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
271 | inside your box. Other bus systems are PCI, EISA, MicroChannel | |
272 | (MCA) or VESA. ISA is an older system, now being displaced by PCI; | |
273 | newer boards don't support it. If you have ISA, say Y, otherwise N. | |
274 | ||
275 | config ISA_DMA | |
276 | bool | |
1da177e4 | 277 | |
5cae841b AV |
278 | config ISA_DMA_API |
279 | bool | |
280 | default y | |
281 | ||
1da177e4 | 282 | config PCI |
c0da085a | 283 | bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB |
1da177e4 LT |
284 | help |
285 | Find out whether you have a PCI motherboard. PCI is the name of a | |
286 | bus system, i.e. the way the CPU talks to the other stuff inside | |
287 | your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or | |
288 | VESA. If you have PCI, say Y, otherwise N. | |
289 | ||
290 | The PCI-HOWTO, available from | |
291 | <http://www.tldp.org/docs.html#howto>, contains valuable | |
292 | information about which PCI hardware does work under Linux and which | |
293 | doesn't. | |
294 | ||
295 | # Select the host bridge type | |
296 | config PCI_HOST_VIA82C505 | |
297 | bool | |
298 | depends on PCI && ARCH_SHARK | |
299 | default y | |
300 | ||
301 | source "drivers/pci/Kconfig" | |
302 | ||
303 | source "drivers/pcmcia/Kconfig" | |
304 | ||
305 | endmenu | |
306 | ||
307 | menu "Kernel Features" | |
308 | ||
309 | config SMP | |
310 | bool "Symmetric Multi-Processing (EXPERIMENTAL)" | |
f7e68bbf | 311 | depends on EXPERIMENTAL #&& n |
1da177e4 LT |
312 | help |
313 | This enables support for systems with more than one CPU. If you have | |
314 | a system with only one CPU, like most personal computers, say N. If | |
315 | you have a system with more than one CPU, say Y. | |
316 | ||
317 | If you say N here, the kernel will run on single and multiprocessor | |
318 | machines, but will use only one CPU of a multiprocessor machine. If | |
319 | you say Y here, the kernel will run on many, but not all, single | |
320 | processor machines. On a single processor machine, the kernel will | |
321 | run faster if you say N here. | |
322 | ||
323 | See also the <file:Documentation/smp.tex>, | |
324 | <file:Documentation/smp.txt>, <file:Documentation/i386/IO-APIC.txt>, | |
325 | <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at | |
326 | <http://www.linuxdoc.org/docs.html#howto>. | |
327 | ||
328 | If you don't know what to do here, say N. | |
329 | ||
330 | config NR_CPUS | |
331 | int "Maximum number of CPUs (2-32)" | |
332 | range 2 32 | |
333 | depends on SMP | |
334 | default "4" | |
335 | ||
336 | config PREEMPT | |
337 | bool "Preemptible Kernel (EXPERIMENTAL)" | |
338 | depends on EXPERIMENTAL | |
339 | help | |
340 | This option reduces the latency of the kernel when reacting to | |
341 | real-time or interactive events by allowing a low priority process to | |
342 | be preempted even if it is in kernel mode executing a system call. | |
343 | This allows applications to run more reliably even when the system is | |
344 | under load. | |
345 | ||
346 | Say Y here if you are building a kernel for a desktop, embedded | |
347 | or real-time system. Say N if you are unsure. | |
348 | ||
8749af68 RK |
349 | config NO_IDLE_HZ |
350 | bool "Dynamic tick timer" | |
351 | help | |
352 | Select this option if you want to disable continuous timer ticks | |
353 | and have them programmed to occur as required. This option saves | |
354 | power as the system can remain in idle state for longer. | |
355 | ||
356 | By default dynamic tick is disabled during the boot, and can be | |
357 | manually enabled with: | |
358 | ||
359 | echo 1 > /sys/devices/system/timer/timer0/dyn_tick | |
360 | ||
361 | Alternatively, if you want dynamic tick automatically enabled | |
362 | during boot, pass "dyntick=enable" via the kernel command string. | |
363 | ||
3f22ab27 | 364 | config ARCH_DISCONTIGMEM_ENABLE |
1da177e4 | 365 | bool |
f7e68bbf | 366 | default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM) |
1da177e4 LT |
367 | help |
368 | Say Y to support efficient handling of discontiguous physical memory, | |
369 | for architectures which are either NUMA (Non-Uniform Memory Access) | |
370 | or have huge holes in the physical address space for other reasons. | |
371 | See <file:Documentation/vm/numa> for more. | |
372 | ||
3f22ab27 DH |
373 | source "mm/Kconfig" |
374 | ||
1da177e4 LT |
375 | config LEDS |
376 | bool "Timer and CPU usage LEDs" | |
377 | depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \ | |
378 | ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \ | |
379 | ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ | |
380 | ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ | |
381 | ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE | |
382 | help | |
383 | If you say Y here, the LEDs on your machine will be used | |
384 | to provide useful information about your current system status. | |
385 | ||
386 | If you are compiling a kernel for a NetWinder or EBSA-285, you will | |
387 | be able to select which LEDs are active using the options below. If | |
388 | you are compiling a kernel for the EBSA-110 or the LART however, the | |
389 | red LED will simply flash regularly to indicate that the system is | |
390 | still functional. It is safe to say Y here if you have a CATS | |
391 | system, but the driver will do nothing. | |
392 | ||
393 | config LEDS_TIMER | |
394 | bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ | |
395 | MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 | |
396 | depends on LEDS | |
397 | default y if ARCH_EBSA110 | |
398 | help | |
399 | If you say Y here, one of the system LEDs (the green one on the | |
400 | NetWinder, the amber one on the EBSA285, or the red one on the LART) | |
401 | will flash regularly to indicate that the system is still | |
402 | operational. This is mainly useful to kernel hackers who are | |
403 | debugging unstable kernels. | |
404 | ||
405 | The LART uses the same LED for both Timer LED and CPU usage LED | |
406 | functions. You may choose to use both, but the Timer LED function | |
407 | will overrule the CPU usage LED. | |
408 | ||
409 | config LEDS_CPU | |
410 | bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ | |
411 | !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 | |
412 | depends on LEDS | |
413 | help | |
414 | If you say Y here, the red LED will be used to give a good real | |
415 | time indication of CPU usage, by lighting whenever the idle task | |
416 | is not currently executing. | |
417 | ||
418 | The LART uses the same LED for both Timer LED and CPU usage LED | |
419 | functions. You may choose to use both, but the Timer LED function | |
420 | will overrule the CPU usage LED. | |
421 | ||
422 | config ALIGNMENT_TRAP | |
423 | bool | |
424 | default y if !ARCH_EBSA110 | |
425 | help | |
426 | ARM processors can not fetch/store information which is not | |
427 | naturally aligned on the bus, i.e., a 4 byte fetch must start at an | |
428 | address divisible by 4. On 32-bit ARM processors, these non-aligned | |
429 | fetch/store instructions will be emulated in software if you say | |
430 | here, which has a severe performance impact. This is necessary for | |
431 | correct operation of some network protocols. With an IP-only | |
432 | configuration it is safe to say N, otherwise say Y. | |
433 | ||
434 | endmenu | |
435 | ||
436 | menu "Boot options" | |
437 | ||
438 | # Compressed boot loader in ROM. Yes, we really want to ask about | |
439 | # TEXT and BSS so we preserve their values in the config files. | |
440 | config ZBOOT_ROM_TEXT | |
441 | hex "Compressed ROM boot loader base address" | |
442 | default "0" | |
443 | help | |
444 | The physical address at which the ROM-able zImage is to be | |
445 | placed in the target. Platforms which normally make use of | |
446 | ROM-able zImage formats normally set this to a suitable | |
447 | value in their defconfig file. | |
448 | ||
449 | If ZBOOT_ROM is not enabled, this has no effect. | |
450 | ||
451 | config ZBOOT_ROM_BSS | |
452 | hex "Compressed ROM boot loader BSS address" | |
453 | default "0" | |
454 | help | |
455 | The base address of 64KiB of read/write memory in the target | |
456 | for the ROM-able zImage, which must be available while the | |
457 | decompressor is running. Platforms which normally make use of | |
458 | ROM-able zImage formats normally set this to a suitable | |
459 | value in their defconfig file. | |
460 | ||
461 | If ZBOOT_ROM is not enabled, this has no effect. | |
462 | ||
463 | config ZBOOT_ROM | |
464 | bool "Compressed boot loader in ROM/flash" | |
465 | depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS | |
466 | help | |
467 | Say Y here if you intend to execute your compressed kernel image | |
468 | (zImage) directly from ROM or flash. If unsure, say N. | |
469 | ||
470 | config CMDLINE | |
471 | string "Default kernel command string" | |
472 | default "" | |
473 | help | |
474 | On some architectures (EBSA110 and CATS), there is currently no way | |
475 | for the boot loader to pass arguments to the kernel. For these | |
476 | architectures, you should supply some command-line options at build | |
477 | time by entering them here. As a minimum, you should specify the | |
478 | memory size and the root device (e.g., mem=64M root=/dev/nfs). | |
479 | ||
480 | config XIP_KERNEL | |
481 | bool "Kernel Execute-In-Place from ROM" | |
482 | depends on !ZBOOT_ROM | |
483 | help | |
484 | Execute-In-Place allows the kernel to run from non-volatile storage | |
485 | directly addressable by the CPU, such as NOR flash. This saves RAM | |
486 | space since the text section of the kernel is not loaded from flash | |
487 | to RAM. Read-write sections, such as the data section and stack, | |
488 | are still copied to RAM. The XIP kernel is not compressed since | |
489 | it has to run directly from flash, so it will take more space to | |
490 | store it. The flash address used to link the kernel object files, | |
491 | and for storing it, is configuration dependent. Therefore, if you | |
492 | say Y here, you must know the proper physical address where to | |
493 | store the kernel image depending on your own flash memory usage. | |
494 | ||
495 | Also note that the make target becomes "make xipImage" rather than | |
496 | "make zImage" or "make Image". The final kernel binary to put in | |
497 | ROM memory will be arch/arm/boot/xipImage. | |
498 | ||
499 | If unsure, say N. | |
500 | ||
501 | config XIP_PHYS_ADDR | |
502 | hex "XIP Kernel Physical Location" | |
503 | depends on XIP_KERNEL | |
504 | default "0x00080000" | |
505 | help | |
506 | This is the physical address in your flash memory the kernel will | |
507 | be linked for and stored to. This address is dependent on your | |
508 | own flash usage. | |
509 | ||
510 | endmenu | |
511 | ||
512 | if (ARCH_SA1100 || ARCH_INTEGRATOR) | |
513 | ||
514 | menu "CPU Frequency scaling" | |
515 | ||
516 | source "drivers/cpufreq/Kconfig" | |
517 | ||
518 | config CPU_FREQ_SA1100 | |
519 | bool | |
07c6d48f | 520 | depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT) |
1da177e4 LT |
521 | default y |
522 | ||
523 | config CPU_FREQ_SA1110 | |
524 | bool | |
525 | depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3) | |
526 | default y | |
527 | ||
528 | config CPU_FREQ_INTEGRATOR | |
529 | tristate "CPUfreq driver for ARM Integrator CPUs" | |
530 | depends on ARCH_INTEGRATOR && CPU_FREQ | |
531 | default y | |
532 | help | |
533 | This enables the CPUfreq driver for ARM Integrator CPUs. | |
534 | ||
535 | For details, take a look at <file:Documentation/cpu-freq>. | |
536 | ||
537 | If in doubt, say Y. | |
538 | ||
539 | endmenu | |
540 | ||
541 | endif | |
542 | ||
543 | menu "Floating point emulation" | |
544 | ||
545 | comment "At least one emulation must be selected" | |
546 | ||
547 | config FPE_NWFPE | |
548 | bool "NWFPE math emulation" | |
549 | ---help--- | |
550 | Say Y to include the NWFPE floating point emulator in the kernel. | |
551 | This is necessary to run most binaries. Linux does not currently | |
552 | support floating point hardware so you need to say Y here even if | |
553 | your machine has an FPA or floating point co-processor podule. | |
554 | ||
555 | You may say N here if you are going to load the Acorn FPEmulator | |
556 | early in the bootup. | |
557 | ||
558 | config FPE_NWFPE_XP | |
559 | bool "Support extended precision" | |
560 | depends on FPE_NWFPE && !CPU_BIG_ENDIAN | |
561 | help | |
562 | Say Y to include 80-bit support in the kernel floating-point | |
563 | emulator. Otherwise, only 32 and 64-bit support is compiled in. | |
564 | Note that gcc does not generate 80-bit operations by default, | |
565 | so in most cases this option only enlarges the size of the | |
566 | floating point emulator without any good reason. | |
567 | ||
568 | You almost surely want to say N here. | |
569 | ||
570 | config FPE_FASTFPE | |
571 | bool "FastFPE math emulation (EXPERIMENTAL)" | |
572 | depends on !CPU_32v3 && EXPERIMENTAL | |
573 | ---help--- | |
574 | Say Y here to include the FAST floating point emulator in the kernel. | |
575 | This is an experimental much faster emulator which now also has full | |
576 | precision for the mantissa. It does not support any exceptions. | |
577 | It is very simple, and approximately 3-6 times faster than NWFPE. | |
578 | ||
579 | It should be sufficient for most programs. It may be not suitable | |
580 | for scientific calculations, but you have to check this for yourself. | |
581 | If you do not feel you need a faster FP emulation you should better | |
582 | choose NWFPE. | |
583 | ||
584 | config VFP | |
585 | bool "VFP-format floating point maths" | |
586 | depends on CPU_V6 || CPU_ARM926T | |
587 | help | |
588 | Say Y to include VFP support code in the kernel. This is needed | |
589 | if your hardware includes a VFP unit. | |
590 | ||
591 | Please see <file:Documentation/arm/VFP/release-notes.txt> for | |
592 | release notes and additional status information. | |
593 | ||
594 | Say N if your target does not have VFP hardware. | |
595 | ||
596 | endmenu | |
597 | ||
598 | menu "Userspace binary formats" | |
599 | ||
600 | source "fs/Kconfig.binfmt" | |
601 | ||
602 | config ARTHUR | |
603 | tristate "RISC OS personality" | |
604 | help | |
605 | Say Y here to include the kernel code necessary if you want to run | |
606 | Acorn RISC OS/Arthur binaries under Linux. This code is still very | |
607 | experimental; if this sounds frightening, say N and sleep in peace. | |
608 | You can also say M here to compile this support as a module (which | |
609 | will be called arthur). | |
610 | ||
611 | endmenu | |
612 | ||
613 | menu "Power management options" | |
614 | ||
615 | config PM | |
616 | bool "Power Management support" | |
617 | ---help--- | |
618 | "Power Management" means that parts of your computer are shut | |
619 | off or put into a power conserving "sleep" mode if they are not | |
620 | being used. There are two competing standards for doing this: APM | |
621 | and ACPI. If you want to use either one, say Y here and then also | |
622 | to the requisite support below. | |
623 | ||
624 | Power Management is most important for battery powered laptop | |
625 | computers; if you have a laptop, check out the Linux Laptop home | |
626 | page on the WWW at <http://www.linux-on-laptops.com/> or | |
627 | Tuxmobil - Linux on Mobile Computers at <http://www.tuxmobil.org/> | |
628 | and the Battery Powered Linux mini-HOWTO, available from | |
629 | <http://www.tldp.org/docs.html#howto>. | |
630 | ||
631 | Note that, even if you say N here, Linux on the x86 architecture | |
632 | will issue the hlt instruction if nothing is to be done, thereby | |
633 | sending the processor to sleep and saving power. | |
634 | ||
635 | config APM | |
636 | tristate "Advanced Power Management Emulation" | |
637 | depends on PM | |
638 | ---help--- | |
639 | APM is a BIOS specification for saving power using several different | |
640 | techniques. This is mostly useful for battery powered laptops with | |
641 | APM compliant BIOSes. If you say Y here, the system time will be | |
642 | reset after a RESUME operation, the /proc/apm device will provide | |
643 | battery status information, and user-space programs will receive | |
644 | notification of APM "events" (e.g. battery status change). | |
645 | ||
646 | If you select "Y" here, you can disable actual use of the APM | |
647 | BIOS by passing the "apm=off" option to the kernel at boot time. | |
648 | ||
649 | Note that the APM support is almost completely disabled for | |
650 | machines with more than one CPU. | |
651 | ||
652 | In order to use APM, you will need supporting software. For location | |
653 | and more information, read <file:Documentation/pm.txt> and the | |
654 | Battery Powered Linux mini-HOWTO, available from | |
655 | <http://www.tldp.org/docs.html#howto>. | |
656 | ||
657 | This driver does not spin down disk drives (see the hdparm(8) | |
658 | manpage ("man 8 hdparm") for that), and it doesn't turn off | |
659 | VESA-compliant "green" monitors. | |
660 | ||
661 | This driver does not support the TI 4000M TravelMate and the ACER | |
662 | 486/DX4/75 because they don't have compliant BIOSes. Many "green" | |
663 | desktop machines also don't have compliant BIOSes, and this driver | |
664 | may cause those machines to panic during the boot phase. | |
665 | ||
666 | Generally, if you don't have a battery in your machine, there isn't | |
667 | much point in using this driver and you should say N. If you get | |
668 | random kernel OOPSes or reboots that don't seem to be related to | |
669 | anything, try disabling/enabling this option (or disabling/enabling | |
670 | APM in your BIOS). | |
671 | ||
672 | Some other things you should try when experiencing seemingly random, | |
673 | "weird" problems: | |
674 | ||
675 | 1) make sure that you have enough swap space and that it is | |
676 | enabled. | |
677 | 2) pass the "no-hlt" option to the kernel | |
678 | 3) switch on floating point emulation in the kernel and pass | |
679 | the "no387" option to the kernel | |
680 | 4) pass the "floppy=nodma" option to the kernel | |
681 | 5) pass the "mem=4M" option to the kernel (thereby disabling | |
682 | all but the first 4 MB of RAM) | |
683 | 6) make sure that the CPU is not over clocked. | |
684 | 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/> | |
685 | 8) disable the cache from your BIOS settings | |
686 | 9) install a fan for the video card or exchange video RAM | |
687 | 10) install a better fan for the CPU | |
688 | 11) exchange RAM chips | |
689 | 12) exchange the motherboard. | |
690 | ||
691 | To compile this driver as a module, choose M here: the | |
692 | module will be called apm. | |
693 | ||
694 | endmenu | |
695 | ||
696 | menu "Device Drivers" | |
697 | ||
698 | source "drivers/base/Kconfig" | |
699 | ||
700 | if ALIGNMENT_TRAP | |
701 | source "drivers/mtd/Kconfig" | |
702 | endif | |
703 | ||
704 | source "drivers/parport/Kconfig" | |
705 | ||
706 | source "drivers/pnp/Kconfig" | |
707 | ||
708 | source "drivers/block/Kconfig" | |
709 | ||
710 | source "drivers/acorn/block/Kconfig" | |
711 | ||
bb011b8e DB |
712 | if PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \ |
713 | || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \ | |
714 | || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE | |
1da177e4 LT |
715 | source "drivers/ide/Kconfig" |
716 | endif | |
717 | ||
718 | source "drivers/scsi/Kconfig" | |
719 | ||
720 | source "drivers/md/Kconfig" | |
721 | ||
722 | source "drivers/message/fusion/Kconfig" | |
723 | ||
724 | source "drivers/ieee1394/Kconfig" | |
725 | ||
726 | source "drivers/message/i2o/Kconfig" | |
727 | ||
728 | source "net/Kconfig" | |
729 | ||
730 | source "drivers/isdn/Kconfig" | |
731 | ||
732 | # input before char - char/joystick depends on it. As does USB. | |
733 | ||
734 | source "drivers/input/Kconfig" | |
735 | ||
736 | source "drivers/char/Kconfig" | |
737 | ||
738 | source "drivers/i2c/Kconfig" | |
739 | ||
740 | #source "drivers/l3/Kconfig" | |
741 | ||
742 | source "drivers/misc/Kconfig" | |
743 | ||
744 | source "drivers/media/Kconfig" | |
745 | ||
746 | source "drivers/video/Kconfig" | |
747 | ||
748 | source "sound/Kconfig" | |
749 | ||
750 | source "drivers/usb/Kconfig" | |
751 | ||
752 | source "drivers/mmc/Kconfig" | |
753 | ||
754 | endmenu | |
755 | ||
756 | source "fs/Kconfig" | |
757 | ||
758 | source "arch/arm/oprofile/Kconfig" | |
759 | ||
760 | source "arch/arm/Kconfig.debug" | |
761 | ||
762 | source "security/Kconfig" | |
763 | ||
764 | source "crypto/Kconfig" | |
765 | ||
766 | source "lib/Kconfig" |