diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/Kconfig |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/arm/Kconfig')
-rw-r--r-- | arch/arm/Kconfig | 736 |
1 files changed, 736 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig new file mode 100644 index 000000000000..4055115ae0e2 --- /dev/null +++ b/arch/arm/Kconfig | |||
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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 | |||
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 | |||
70 | config GENERIC_IOMAP | ||
71 | bool | ||
72 | default y | ||
73 | |||
74 | config FIQ | ||
75 | bool | ||
76 | |||
77 | source "init/Kconfig" | ||
78 | |||
79 | menu "System Type" | ||
80 | |||
81 | choice | ||
82 | prompt "ARM system type" | ||
83 | default ARCH_RPC | ||
84 | |||
85 | config ARCH_CLPS7500 | ||
86 | bool "Cirrus-CL-PS7500FE" | ||
87 | select TIMER_ACORN | ||
88 | |||
89 | config ARCH_CLPS711X | ||
90 | bool "CLPS711x/EP721x-based" | ||
91 | |||
92 | config ARCH_CO285 | ||
93 | bool "Co-EBSA285" | ||
94 | select FOOTBRIDGE | ||
95 | select FOOTBRIDGE_ADDIN | ||
96 | |||
97 | config ARCH_EBSA110 | ||
98 | bool "EBSA-110" | ||
99 | help | ||
100 | This is an evaluation board for the StrongARM processor available | ||
101 | from Digital. It has limited hardware on-board, including an onboard | ||
102 | Ethernet interface, two PCMCIA sockets, two serial ports and a | ||
103 | parallel port. | ||
104 | |||
105 | config ARCH_CAMELOT | ||
106 | bool "Epxa10db" | ||
107 | help | ||
108 | This enables support for Altera's Excalibur XA10 development board. | ||
109 | If you would like to build your kernel to run on one of these boards | ||
110 | then you must say 'Y' here. Otherwise say 'N' | ||
111 | |||
112 | config ARCH_FOOTBRIDGE | ||
113 | bool "FootBridge" | ||
114 | select FOOTBRIDGE | ||
115 | |||
116 | config ARCH_INTEGRATOR | ||
117 | bool "Integrator" | ||
118 | select ARM_AMBA | ||
119 | select ICST525 | ||
120 | |||
121 | config ARCH_IOP3XX | ||
122 | bool "IOP3xx-based" | ||
123 | |||
124 | config ARCH_IXP4XX | ||
125 | bool "IXP4xx-based" | ||
126 | select DMABOUNCE | ||
127 | |||
128 | config ARCH_IXP2000 | ||
129 | bool "IXP2400/2800-based" | ||
130 | |||
131 | config ARCH_L7200 | ||
132 | bool "LinkUp-L7200" | ||
133 | select FIQ | ||
134 | help | ||
135 | Say Y here if you intend to run this kernel on a LinkUp Systems | ||
136 | L7200 Software Development Board which uses an ARM720T processor. | ||
137 | Information on this board can be obtained at: | ||
138 | |||
139 | <http://www.linkupsys.com/> | ||
140 | |||
141 | If you have any questions or comments about the Linux kernel port | ||
142 | to this board, send e-mail to <sjhill@cotw.com>. | ||
143 | |||
144 | config ARCH_PXA | ||
145 | bool "PXA2xx-based" | ||
146 | |||
147 | config ARCH_RPC | ||
148 | bool "RiscPC" | ||
149 | select ARCH_ACORN | ||
150 | select FIQ | ||
151 | select TIMER_ACORN | ||
152 | help | ||
153 | On the Acorn Risc-PC, Linux can support the internal IDE disk and | ||
154 | CD-ROM interface, serial and parallel port, and the floppy drive. | ||
155 | |||
156 | config ARCH_SA1100 | ||
157 | bool "SA1100-based" | ||
158 | |||
159 | config ARCH_S3C2410 | ||
160 | bool "Samsung S3C2410" | ||
161 | help | ||
162 | Samsung S3C2410X CPU based systems, such as the Simtec Electronics | ||
163 | BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or | ||
164 | the Samsung SMDK2410 development board (and derviatives). | ||
165 | |||
166 | config ARCH_SHARK | ||
167 | bool "Shark" | ||
168 | |||
169 | config ARCH_LH7A40X | ||
170 | bool "Sharp LH7A40X" | ||
171 | help | ||
172 | Say Y here for systems based on one of the Sharp LH7A40X | ||
173 | System on a Chip processors. These CPUs include an ARM922T | ||
174 | core with a wide array of integrated devices for | ||
175 | hand-held and low-power applications. | ||
176 | |||
177 | config ARCH_OMAP | ||
178 | bool "TI OMAP" | ||
179 | |||
180 | config ARCH_VERSATILE | ||
181 | bool "Versatile" | ||
182 | select ARM_AMBA | ||
183 | select ICST307 | ||
184 | help | ||
185 | This enables support for ARM Ltd Versatile board. | ||
186 | |||
187 | config ARCH_IMX | ||
188 | bool "IMX" | ||
189 | |||
190 | config ARCH_H720X | ||
191 | bool "Hynix-HMS720x-based" | ||
192 | help | ||
193 | This enables support for systems based on the Hynix HMS720x | ||
194 | |||
195 | endchoice | ||
196 | |||
197 | source "arch/arm/mach-clps711x/Kconfig" | ||
198 | |||
199 | source "arch/arm/mach-epxa10db/Kconfig" | ||
200 | |||
201 | source "arch/arm/mach-footbridge/Kconfig" | ||
202 | |||
203 | source "arch/arm/mach-integrator/Kconfig" | ||
204 | |||
205 | source "arch/arm/mach-iop3xx/Kconfig" | ||
206 | |||
207 | source "arch/arm/mach-ixp4xx/Kconfig" | ||
208 | |||
209 | source "arch/arm/mach-ixp2000/Kconfig" | ||
210 | |||
211 | source "arch/arm/mach-pxa/Kconfig" | ||
212 | |||
213 | source "arch/arm/mach-sa1100/Kconfig" | ||
214 | |||
215 | source "arch/arm/mach-omap/Kconfig" | ||
216 | |||
217 | source "arch/arm/mach-s3c2410/Kconfig" | ||
218 | |||
219 | source "arch/arm/mach-lh7a40x/Kconfig" | ||
220 | |||
221 | source "arch/arm/mach-imx/Kconfig" | ||
222 | |||
223 | source "arch/arm/mach-h720x/Kconfig" | ||
224 | |||
225 | source "arch/arm/mach-versatile/Kconfig" | ||
226 | |||
227 | # Definitions to make life easier | ||
228 | config ARCH_ACORN | ||
229 | bool | ||
230 | |||
231 | source arch/arm/mm/Kconfig | ||
232 | |||
233 | # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER | ||
234 | config XSCALE_PMU | ||
235 | bool | ||
236 | depends on CPU_XSCALE && !XSCALE_PMU_TIMER | ||
237 | default y | ||
238 | |||
239 | endmenu | ||
240 | |||
241 | source "arch/arm/common/Kconfig" | ||
242 | |||
243 | config FORCE_MAX_ZONEORDER | ||
244 | int | ||
245 | depends on SA1111 | ||
246 | default "9" | ||
247 | |||
248 | menu "Bus support" | ||
249 | |||
250 | config ARM_AMBA | ||
251 | bool | ||
252 | |||
253 | config ISA | ||
254 | bool | ||
255 | depends on FOOTBRIDGE_HOST || ARCH_SHARK || ARCH_CLPS7500 || ARCH_EBSA110 || ARCH_CDB89712 || ARCH_EDB7211 || ARCH_SA1100 || ARCH_MX1ADS | ||
256 | default y | ||
257 | help | ||
258 | Find out whether you have ISA slots on your motherboard. ISA is the | ||
259 | name of a bus system, i.e. the way the CPU talks to the other stuff | ||
260 | inside your box. Other bus systems are PCI, EISA, MicroChannel | ||
261 | (MCA) or VESA. ISA is an older system, now being displaced by PCI; | ||
262 | newer boards don't support it. If you have ISA, say Y, otherwise N. | ||
263 | |||
264 | config ISA_DMA | ||
265 | bool | ||
266 | depends on FOOTBRIDGE_HOST || ARCH_SHARK | ||
267 | default y | ||
268 | |||
269 | config PCI | ||
270 | bool "PCI support" if ARCH_INTEGRATOR_AP | ||
271 | default y if ARCH_SHARK || FOOTBRIDGE_HOST || ARCH_IOP3XX || ARCH_IXP4XX || ARCH_IXP2000 | ||
272 | help | ||
273 | Find out whether you have a PCI motherboard. PCI is the name of a | ||
274 | bus system, i.e. the way the CPU talks to the other stuff inside | ||
275 | your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or | ||
276 | VESA. If you have PCI, say Y, otherwise N. | ||
277 | |||
278 | The PCI-HOWTO, available from | ||
279 | <http://www.tldp.org/docs.html#howto>, contains valuable | ||
280 | information about which PCI hardware does work under Linux and which | ||
281 | doesn't. | ||
282 | |||
283 | # Select the host bridge type | ||
284 | config PCI_HOST_VIA82C505 | ||
285 | bool | ||
286 | depends on PCI && ARCH_SHARK | ||
287 | default y | ||
288 | |||
289 | source "drivers/pci/Kconfig" | ||
290 | |||
291 | source "drivers/pcmcia/Kconfig" | ||
292 | |||
293 | endmenu | ||
294 | |||
295 | menu "Kernel Features" | ||
296 | |||
297 | config SMP | ||
298 | bool "Symmetric Multi-Processing (EXPERIMENTAL)" | ||
299 | depends on EXPERIMENTAL && n | ||
300 | help | ||
301 | This enables support for systems with more than one CPU. If you have | ||
302 | a system with only one CPU, like most personal computers, say N. If | ||
303 | you have a system with more than one CPU, say Y. | ||
304 | |||
305 | If you say N here, the kernel will run on single and multiprocessor | ||
306 | machines, but will use only one CPU of a multiprocessor machine. If | ||
307 | you say Y here, the kernel will run on many, but not all, single | ||
308 | processor machines. On a single processor machine, the kernel will | ||
309 | run faster if you say N here. | ||
310 | |||
311 | See also the <file:Documentation/smp.tex>, | ||
312 | <file:Documentation/smp.txt>, <file:Documentation/i386/IO-APIC.txt>, | ||
313 | <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at | ||
314 | <http://www.linuxdoc.org/docs.html#howto>. | ||
315 | |||
316 | If you don't know what to do here, say N. | ||
317 | |||
318 | config NR_CPUS | ||
319 | int "Maximum number of CPUs (2-32)" | ||
320 | range 2 32 | ||
321 | depends on SMP | ||
322 | default "4" | ||
323 | |||
324 | config PREEMPT | ||
325 | bool "Preemptible Kernel (EXPERIMENTAL)" | ||
326 | depends on EXPERIMENTAL | ||
327 | help | ||
328 | This option reduces the latency of the kernel when reacting to | ||
329 | real-time or interactive events by allowing a low priority process to | ||
330 | be preempted even if it is in kernel mode executing a system call. | ||
331 | This allows applications to run more reliably even when the system is | ||
332 | under load. | ||
333 | |||
334 | Say Y here if you are building a kernel for a desktop, embedded | ||
335 | or real-time system. Say N if you are unsure. | ||
336 | |||
337 | config DISCONTIGMEM | ||
338 | bool | ||
339 | depends on ARCH_EDB7211 || ARCH_SA1100 || (ARCH_LH7A40X && !LH7A40X_CONTIGMEM) | ||
340 | default y | ||
341 | help | ||
342 | Say Y to support efficient handling of discontiguous physical memory, | ||
343 | for architectures which are either NUMA (Non-Uniform Memory Access) | ||
344 | or have huge holes in the physical address space for other reasons. | ||
345 | See <file:Documentation/vm/numa> for more. | ||
346 | |||
347 | config LEDS | ||
348 | bool "Timer and CPU usage LEDs" | ||
349 | depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \ | ||
350 | ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \ | ||
351 | ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ | ||
352 | ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ | ||
353 | ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE | ||
354 | help | ||
355 | If you say Y here, the LEDs on your machine will be used | ||
356 | to provide useful information about your current system status. | ||
357 | |||
358 | If you are compiling a kernel for a NetWinder or EBSA-285, you will | ||
359 | be able to select which LEDs are active using the options below. If | ||
360 | you are compiling a kernel for the EBSA-110 or the LART however, the | ||
361 | red LED will simply flash regularly to indicate that the system is | ||
362 | still functional. It is safe to say Y here if you have a CATS | ||
363 | system, but the driver will do nothing. | ||
364 | |||
365 | config LEDS_TIMER | ||
366 | bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ | ||
367 | MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 | ||
368 | depends on LEDS | ||
369 | default y if ARCH_EBSA110 | ||
370 | help | ||
371 | If you say Y here, one of the system LEDs (the green one on the | ||
372 | NetWinder, the amber one on the EBSA285, or the red one on the LART) | ||
373 | will flash regularly to indicate that the system is still | ||
374 | operational. This is mainly useful to kernel hackers who are | ||
375 | debugging unstable kernels. | ||
376 | |||
377 | The LART uses the same LED for both Timer LED and CPU usage LED | ||
378 | functions. You may choose to use both, but the Timer LED function | ||
379 | will overrule the CPU usage LED. | ||
380 | |||
381 | config LEDS_CPU | ||
382 | bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ | ||
383 | !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 | ||
384 | depends on LEDS | ||
385 | help | ||
386 | If you say Y here, the red LED will be used to give a good real | ||
387 | time indication of CPU usage, by lighting whenever the idle task | ||
388 | is not currently executing. | ||
389 | |||
390 | The LART uses the same LED for both Timer LED and CPU usage LED | ||
391 | functions. You may choose to use both, but the Timer LED function | ||
392 | will overrule the CPU usage LED. | ||
393 | |||
394 | config ALIGNMENT_TRAP | ||
395 | bool | ||
396 | default y if !ARCH_EBSA110 | ||
397 | help | ||
398 | ARM processors can not fetch/store information which is not | ||
399 | naturally aligned on the bus, i.e., a 4 byte fetch must start at an | ||
400 | address divisible by 4. On 32-bit ARM processors, these non-aligned | ||
401 | fetch/store instructions will be emulated in software if you say | ||
402 | here, which has a severe performance impact. This is necessary for | ||
403 | correct operation of some network protocols. With an IP-only | ||
404 | configuration it is safe to say N, otherwise say Y. | ||
405 | |||
406 | endmenu | ||
407 | |||
408 | menu "Boot options" | ||
409 | |||
410 | # Compressed boot loader in ROM. Yes, we really want to ask about | ||
411 | # TEXT and BSS so we preserve their values in the config files. | ||
412 | config ZBOOT_ROM_TEXT | ||
413 | hex "Compressed ROM boot loader base address" | ||
414 | default "0" | ||
415 | help | ||
416 | The physical address at which the ROM-able zImage is to be | ||
417 | placed in the target. Platforms which normally make use of | ||
418 | ROM-able zImage formats normally set this to a suitable | ||
419 | value in their defconfig file. | ||
420 | |||
421 | If ZBOOT_ROM is not enabled, this has no effect. | ||
422 | |||
423 | config ZBOOT_ROM_BSS | ||
424 | hex "Compressed ROM boot loader BSS address" | ||
425 | default "0" | ||
426 | help | ||
427 | The base address of 64KiB of read/write memory in the target | ||
428 | for the ROM-able zImage, which must be available while the | ||
429 | decompressor is running. Platforms which normally make use of | ||
430 | ROM-able zImage formats normally set this to a suitable | ||
431 | value in their defconfig file. | ||
432 | |||
433 | If ZBOOT_ROM is not enabled, this has no effect. | ||
434 | |||
435 | config ZBOOT_ROM | ||
436 | bool "Compressed boot loader in ROM/flash" | ||
437 | depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS | ||
438 | help | ||
439 | Say Y here if you intend to execute your compressed kernel image | ||
440 | (zImage) directly from ROM or flash. If unsure, say N. | ||
441 | |||
442 | config CMDLINE | ||
443 | string "Default kernel command string" | ||
444 | default "" | ||
445 | help | ||
446 | On some architectures (EBSA110 and CATS), there is currently no way | ||
447 | for the boot loader to pass arguments to the kernel. For these | ||
448 | architectures, you should supply some command-line options at build | ||
449 | time by entering them here. As a minimum, you should specify the | ||
450 | memory size and the root device (e.g., mem=64M root=/dev/nfs). | ||
451 | |||
452 | config XIP_KERNEL | ||
453 | bool "Kernel Execute-In-Place from ROM" | ||
454 | depends on !ZBOOT_ROM | ||
455 | help | ||
456 | Execute-In-Place allows the kernel to run from non-volatile storage | ||
457 | directly addressable by the CPU, such as NOR flash. This saves RAM | ||
458 | space since the text section of the kernel is not loaded from flash | ||
459 | to RAM. Read-write sections, such as the data section and stack, | ||
460 | are still copied to RAM. The XIP kernel is not compressed since | ||
461 | it has to run directly from flash, so it will take more space to | ||
462 | store it. The flash address used to link the kernel object files, | ||
463 | and for storing it, is configuration dependent. Therefore, if you | ||
464 | say Y here, you must know the proper physical address where to | ||
465 | store the kernel image depending on your own flash memory usage. | ||
466 | |||
467 | Also note that the make target becomes "make xipImage" rather than | ||
468 | "make zImage" or "make Image". The final kernel binary to put in | ||
469 | ROM memory will be arch/arm/boot/xipImage. | ||
470 | |||
471 | If unsure, say N. | ||
472 | |||
473 | config XIP_PHYS_ADDR | ||
474 | hex "XIP Kernel Physical Location" | ||
475 | depends on XIP_KERNEL | ||
476 | default "0x00080000" | ||
477 | help | ||
478 | This is the physical address in your flash memory the kernel will | ||
479 | be linked for and stored to. This address is dependent on your | ||
480 | own flash usage. | ||
481 | |||
482 | endmenu | ||
483 | |||
484 | if (ARCH_SA1100 || ARCH_INTEGRATOR) | ||
485 | |||
486 | menu "CPU Frequency scaling" | ||
487 | |||
488 | source "drivers/cpufreq/Kconfig" | ||
489 | |||
490 | config CPU_FREQ_SA1100 | ||
491 | bool | ||
492 | depends on CPU_FREQ && (SA1100_LART || SA1100_PLEB) | ||
493 | default y | ||
494 | |||
495 | config CPU_FREQ_SA1110 | ||
496 | bool | ||
497 | depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3) | ||
498 | default y | ||
499 | |||
500 | config CPU_FREQ_INTEGRATOR | ||
501 | tristate "CPUfreq driver for ARM Integrator CPUs" | ||
502 | depends on ARCH_INTEGRATOR && CPU_FREQ | ||
503 | default y | ||
504 | help | ||
505 | This enables the CPUfreq driver for ARM Integrator CPUs. | ||
506 | |||
507 | For details, take a look at <file:Documentation/cpu-freq>. | ||
508 | |||
509 | If in doubt, say Y. | ||
510 | |||
511 | endmenu | ||
512 | |||
513 | endif | ||
514 | |||
515 | menu "Floating point emulation" | ||
516 | |||
517 | comment "At least one emulation must be selected" | ||
518 | |||
519 | config FPE_NWFPE | ||
520 | bool "NWFPE math emulation" | ||
521 | ---help--- | ||
522 | Say Y to include the NWFPE floating point emulator in the kernel. | ||
523 | This is necessary to run most binaries. Linux does not currently | ||
524 | support floating point hardware so you need to say Y here even if | ||
525 | your machine has an FPA or floating point co-processor podule. | ||
526 | |||
527 | You may say N here if you are going to load the Acorn FPEmulator | ||
528 | early in the bootup. | ||
529 | |||
530 | config FPE_NWFPE_XP | ||
531 | bool "Support extended precision" | ||
532 | depends on FPE_NWFPE && !CPU_BIG_ENDIAN | ||
533 | help | ||
534 | Say Y to include 80-bit support in the kernel floating-point | ||
535 | emulator. Otherwise, only 32 and 64-bit support is compiled in. | ||
536 | Note that gcc does not generate 80-bit operations by default, | ||
537 | so in most cases this option only enlarges the size of the | ||
538 | floating point emulator without any good reason. | ||
539 | |||
540 | You almost surely want to say N here. | ||
541 | |||
542 | config FPE_FASTFPE | ||
543 | bool "FastFPE math emulation (EXPERIMENTAL)" | ||
544 | depends on !CPU_32v3 && EXPERIMENTAL | ||
545 | ---help--- | ||
546 | Say Y here to include the FAST floating point emulator in the kernel. | ||
547 | This is an experimental much faster emulator which now also has full | ||
548 | precision for the mantissa. It does not support any exceptions. | ||
549 | It is very simple, and approximately 3-6 times faster than NWFPE. | ||
550 | |||
551 | It should be sufficient for most programs. It may be not suitable | ||
552 | for scientific calculations, but you have to check this for yourself. | ||
553 | If you do not feel you need a faster FP emulation you should better | ||
554 | choose NWFPE. | ||
555 | |||
556 | config VFP | ||
557 | bool "VFP-format floating point maths" | ||
558 | depends on CPU_V6 || CPU_ARM926T | ||
559 | help | ||
560 | Say Y to include VFP support code in the kernel. This is needed | ||
561 | if your hardware includes a VFP unit. | ||
562 | |||
563 | Please see <file:Documentation/arm/VFP/release-notes.txt> for | ||
564 | release notes and additional status information. | ||
565 | |||
566 | Say N if your target does not have VFP hardware. | ||
567 | |||
568 | endmenu | ||
569 | |||
570 | menu "Userspace binary formats" | ||
571 | |||
572 | source "fs/Kconfig.binfmt" | ||
573 | |||
574 | config ARTHUR | ||
575 | tristate "RISC OS personality" | ||
576 | help | ||
577 | Say Y here to include the kernel code necessary if you want to run | ||
578 | Acorn RISC OS/Arthur binaries under Linux. This code is still very | ||
579 | experimental; if this sounds frightening, say N and sleep in peace. | ||
580 | You can also say M here to compile this support as a module (which | ||
581 | will be called arthur). | ||
582 | |||
583 | endmenu | ||
584 | |||
585 | menu "Power management options" | ||
586 | |||
587 | config PM | ||
588 | bool "Power Management support" | ||
589 | ---help--- | ||
590 | "Power Management" means that parts of your computer are shut | ||
591 | off or put into a power conserving "sleep" mode if they are not | ||
592 | being used. There are two competing standards for doing this: APM | ||
593 | and ACPI. If you want to use either one, say Y here and then also | ||
594 | to the requisite support below. | ||
595 | |||
596 | Power Management is most important for battery powered laptop | ||
597 | computers; if you have a laptop, check out the Linux Laptop home | ||
598 | page on the WWW at <http://www.linux-on-laptops.com/> or | ||
599 | Tuxmobil - Linux on Mobile Computers at <http://www.tuxmobil.org/> | ||
600 | and the Battery Powered Linux mini-HOWTO, available from | ||
601 | <http://www.tldp.org/docs.html#howto>. | ||
602 | |||
603 | Note that, even if you say N here, Linux on the x86 architecture | ||
604 | will issue the hlt instruction if nothing is to be done, thereby | ||
605 | sending the processor to sleep and saving power. | ||
606 | |||
607 | config APM | ||
608 | tristate "Advanced Power Management Emulation" | ||
609 | depends on PM | ||
610 | ---help--- | ||
611 | APM is a BIOS specification for saving power using several different | ||
612 | techniques. This is mostly useful for battery powered laptops with | ||
613 | APM compliant BIOSes. If you say Y here, the system time will be | ||
614 | reset after a RESUME operation, the /proc/apm device will provide | ||
615 | battery status information, and user-space programs will receive | ||
616 | notification of APM "events" (e.g. battery status change). | ||
617 | |||
618 | If you select "Y" here, you can disable actual use of the APM | ||
619 | BIOS by passing the "apm=off" option to the kernel at boot time. | ||
620 | |||
621 | Note that the APM support is almost completely disabled for | ||
622 | machines with more than one CPU. | ||
623 | |||
624 | In order to use APM, you will need supporting software. For location | ||
625 | and more information, read <file:Documentation/pm.txt> and the | ||
626 | Battery Powered Linux mini-HOWTO, available from | ||
627 | <http://www.tldp.org/docs.html#howto>. | ||
628 | |||
629 | This driver does not spin down disk drives (see the hdparm(8) | ||
630 | manpage ("man 8 hdparm") for that), and it doesn't turn off | ||
631 | VESA-compliant "green" monitors. | ||
632 | |||
633 | This driver does not support the TI 4000M TravelMate and the ACER | ||
634 | 486/DX4/75 because they don't have compliant BIOSes. Many "green" | ||
635 | desktop machines also don't have compliant BIOSes, and this driver | ||
636 | may cause those machines to panic during the boot phase. | ||
637 | |||
638 | Generally, if you don't have a battery in your machine, there isn't | ||
639 | much point in using this driver and you should say N. If you get | ||
640 | random kernel OOPSes or reboots that don't seem to be related to | ||
641 | anything, try disabling/enabling this option (or disabling/enabling | ||
642 | APM in your BIOS). | ||
643 | |||
644 | Some other things you should try when experiencing seemingly random, | ||
645 | "weird" problems: | ||
646 | |||
647 | 1) make sure that you have enough swap space and that it is | ||
648 | enabled. | ||
649 | 2) pass the "no-hlt" option to the kernel | ||
650 | 3) switch on floating point emulation in the kernel and pass | ||
651 | the "no387" option to the kernel | ||
652 | 4) pass the "floppy=nodma" option to the kernel | ||
653 | 5) pass the "mem=4M" option to the kernel (thereby disabling | ||
654 | all but the first 4 MB of RAM) | ||
655 | 6) make sure that the CPU is not over clocked. | ||
656 | 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/> | ||
657 | 8) disable the cache from your BIOS settings | ||
658 | 9) install a fan for the video card or exchange video RAM | ||
659 | 10) install a better fan for the CPU | ||
660 | 11) exchange RAM chips | ||
661 | 12) exchange the motherboard. | ||
662 | |||
663 | To compile this driver as a module, choose M here: the | ||
664 | module will be called apm. | ||
665 | |||
666 | endmenu | ||
667 | |||
668 | menu "Device Drivers" | ||
669 | |||
670 | source "drivers/base/Kconfig" | ||
671 | |||
672 | if ALIGNMENT_TRAP | ||
673 | source "drivers/mtd/Kconfig" | ||
674 | endif | ||
675 | |||
676 | source "drivers/parport/Kconfig" | ||
677 | |||
678 | source "drivers/pnp/Kconfig" | ||
679 | |||
680 | source "drivers/block/Kconfig" | ||
681 | |||
682 | source "drivers/acorn/block/Kconfig" | ||
683 | |||
684 | if ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE | ||
685 | source "drivers/ide/Kconfig" | ||
686 | endif | ||
687 | |||
688 | source "drivers/scsi/Kconfig" | ||
689 | |||
690 | source "drivers/md/Kconfig" | ||
691 | |||
692 | source "drivers/message/fusion/Kconfig" | ||
693 | |||
694 | source "drivers/ieee1394/Kconfig" | ||
695 | |||
696 | source "drivers/message/i2o/Kconfig" | ||
697 | |||
698 | source "net/Kconfig" | ||
699 | |||
700 | source "drivers/isdn/Kconfig" | ||
701 | |||
702 | # input before char - char/joystick depends on it. As does USB. | ||
703 | |||
704 | source "drivers/input/Kconfig" | ||
705 | |||
706 | source "drivers/char/Kconfig" | ||
707 | |||
708 | source "drivers/i2c/Kconfig" | ||
709 | |||
710 | #source "drivers/l3/Kconfig" | ||
711 | |||
712 | source "drivers/misc/Kconfig" | ||
713 | |||
714 | source "drivers/media/Kconfig" | ||
715 | |||
716 | source "drivers/video/Kconfig" | ||
717 | |||
718 | source "sound/Kconfig" | ||
719 | |||
720 | source "drivers/usb/Kconfig" | ||
721 | |||
722 | source "drivers/mmc/Kconfig" | ||
723 | |||
724 | endmenu | ||
725 | |||
726 | source "fs/Kconfig" | ||
727 | |||
728 | source "arch/arm/oprofile/Kconfig" | ||
729 | |||
730 | source "arch/arm/Kconfig.debug" | ||
731 | |||
732 | source "security/Kconfig" | ||
733 | |||
734 | source "crypto/Kconfig" | ||
735 | |||
736 | source "lib/Kconfig" | ||