Commit | Line | Data |
---|---|---|
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 | |
12b824fb | 11 | select RTC_LIB |
75e7153a | 12 | select SYS_SUPPORTS_APM_EMULATION |
1da177e4 LT |
13 | help |
14 | The ARM series is a line of low-power-consumption RISC chip designs | |
f6c8965a | 15 | licensed by ARM Ltd and targeted at embedded applications and |
1da177e4 | 16 | handhelds such as the Compaq IPAQ. ARM-based PCs are no longer |
f6c8965a | 17 | manufactured, but legacy ARM-based PC hardware remains popular in |
1da177e4 LT |
18 | Europe. There is an ARM Linux project with a web page at |
19 | <http://www.arm.linux.org.uk/>. | |
20 | ||
75e7153a RB |
21 | config SYS_SUPPORTS_APM_EMULATION |
22 | bool | |
23 | ||
746140c7 KH |
24 | config GENERIC_TIME |
25 | bool | |
26 | default n | |
27 | ||
1da177e4 LT |
28 | config MMU |
29 | bool | |
30 | default y | |
31 | ||
5ea81769 AV |
32 | config NO_IOPORT |
33 | bool | |
34 | default n | |
35 | ||
1da177e4 LT |
36 | config EISA |
37 | bool | |
38 | ---help--- | |
39 | The Extended Industry Standard Architecture (EISA) bus was | |
40 | developed as an open alternative to the IBM MicroChannel bus. | |
41 | ||
42 | The EISA bus provided some of the features of the IBM MicroChannel | |
43 | bus while maintaining backward compatibility with cards made for | |
44 | the older ISA bus. The EISA bus saw limited use between 1988 and | |
45 | 1995 when it was made obsolete by the PCI bus. | |
46 | ||
47 | Say Y here if you are building a kernel for an EISA-based machine. | |
48 | ||
49 | Otherwise, say N. | |
50 | ||
51 | config SBUS | |
52 | bool | |
53 | ||
54 | config MCA | |
55 | bool | |
56 | help | |
57 | MicroChannel Architecture is found in some IBM PS/2 machines and | |
58 | laptops. It is a bus system similar to PCI or ISA. See | |
59 | <file:Documentation/mca.txt> (and especially the web page given | |
60 | there) before attempting to build an MCA bus kernel. | |
61 | ||
4a2581a0 TG |
62 | config GENERIC_HARDIRQS |
63 | bool | |
64 | default y | |
65 | ||
7ad1bcb2 RK |
66 | config TRACE_IRQFLAGS_SUPPORT |
67 | bool | |
68 | default y | |
69 | ||
4a2581a0 TG |
70 | config HARDIRQS_SW_RESEND |
71 | bool | |
72 | default y | |
73 | ||
74 | config GENERIC_IRQ_PROBE | |
75 | bool | |
76 | default y | |
77 | ||
1da177e4 LT |
78 | config RWSEM_GENERIC_SPINLOCK |
79 | bool | |
80 | default y | |
81 | ||
82 | config RWSEM_XCHGADD_ALGORITHM | |
83 | bool | |
84 | ||
f0d1b0b3 DH |
85 | config ARCH_HAS_ILOG2_U32 |
86 | bool | |
87 | default n | |
88 | ||
89 | config ARCH_HAS_ILOG2_U64 | |
90 | bool | |
91 | default n | |
92 | ||
b89c3b16 AM |
93 | config GENERIC_HWEIGHT |
94 | bool | |
95 | default y | |
96 | ||
1da177e4 LT |
97 | config GENERIC_CALIBRATE_DELAY |
98 | bool | |
99 | default y | |
100 | ||
101 | config GENERIC_BUST_SPINLOCK | |
102 | bool | |
103 | ||
a08b6b79 Z |
104 | config ARCH_MAY_HAVE_PC_FDC |
105 | bool | |
106 | ||
5ac6da66 CL |
107 | config ZONE_DMA |
108 | bool | |
109 | default y | |
110 | ||
1da177e4 LT |
111 | config GENERIC_ISA_DMA |
112 | bool | |
113 | ||
1da177e4 LT |
114 | config FIQ |
115 | bool | |
116 | ||
034d2f5a AV |
117 | config ARCH_MTD_XIP |
118 | bool | |
119 | ||
c760fc19 HC |
120 | config VECTORS_BASE |
121 | hex | |
6afd6fae | 122 | default 0xffff0000 if MMU || CPU_HIGH_VECTOR |
c760fc19 HC |
123 | default DRAM_BASE if REMAP_VECTORS_TO_RAM |
124 | default 0x00000000 | |
125 | help | |
126 | The base address of exception vectors. | |
127 | ||
1da177e4 LT |
128 | source "init/Kconfig" |
129 | ||
130 | menu "System Type" | |
131 | ||
132 | choice | |
133 | prompt "ARM system type" | |
6a0e2430 | 134 | default ARCH_VERSATILE |
1da177e4 | 135 | |
4af6fee1 DS |
136 | config ARCH_AAEC2000 |
137 | bool "Agilent AAEC-2000 based" | |
138 | select ARM_AMBA | |
139 | help | |
140 | This enables support for systems based on the Agilent AAEC-2000 | |
141 | ||
142 | config ARCH_INTEGRATOR | |
143 | bool "ARM Ltd. Integrator family" | |
144 | select ARM_AMBA | |
145 | select ICST525 | |
146 | help | |
147 | Support for ARM's Integrator platform. | |
148 | ||
149 | config ARCH_REALVIEW | |
150 | bool "ARM Ltd. RealView family" | |
151 | select ARM_AMBA | |
152 | select ICST307 | |
153 | help | |
154 | This enables support for ARM Ltd RealView boards. | |
155 | ||
156 | config ARCH_VERSATILE | |
157 | bool "ARM Ltd. Versatile family" | |
158 | select ARM_AMBA | |
159 | select ARM_VIC | |
160 | select ICST307 | |
161 | help | |
162 | This enables support for ARM Ltd Versatile board. | |
163 | ||
8fc5ffa0 AV |
164 | config ARCH_AT91 |
165 | bool "Atmel AT91" | |
4af6fee1 | 166 | help |
8fc5ffa0 AV |
167 | This enables support for systems based on the Atmel AT91RM9200 |
168 | and AT91SAM9xxx processors. | |
4af6fee1 | 169 | |
1da177e4 | 170 | config ARCH_CLPS7500 |
4af6fee1 | 171 | bool "Cirrus CL-PS7500FE" |
1da177e4 | 172 | select TIMER_ACORN |
f7e68bbf | 173 | select ISA |
e4169889 | 174 | select NO_IOPORT |
f999b8bd MM |
175 | help |
176 | Support for the Cirrus Logic PS7500FE system-on-a-chip. | |
1da177e4 LT |
177 | |
178 | config ARCH_CLPS711X | |
4af6fee1 | 179 | bool "Cirrus Logic CLPS711x/EP721x-based" |
f999b8bd MM |
180 | help |
181 | Support for Cirrus Logic 711x/721x based boards. | |
1da177e4 LT |
182 | |
183 | config ARCH_CO285 | |
184 | bool "Co-EBSA285" | |
185 | select FOOTBRIDGE | |
186 | select FOOTBRIDGE_ADDIN | |
f999b8bd MM |
187 | help |
188 | Support for Intel's EBSA285 companion chip. | |
1da177e4 LT |
189 | |
190 | config ARCH_EBSA110 | |
191 | bool "EBSA-110" | |
f7e68bbf | 192 | select ISA |
c5eb2a2b | 193 | select NO_IOPORT |
1da177e4 LT |
194 | help |
195 | This is an evaluation board for the StrongARM processor available | |
f6c8965a | 196 | from Digital. It has limited hardware on-board, including an |
1da177e4 LT |
197 | Ethernet interface, two PCMCIA sockets, two serial ports and a |
198 | parallel port. | |
199 | ||
e7736d47 LB |
200 | config ARCH_EP93XX |
201 | bool "EP93xx-based" | |
202 | select ARM_AMBA | |
203 | select ARM_VIC | |
204 | help | |
205 | This enables support for the Cirrus EP93xx series of CPUs. | |
206 | ||
1da177e4 LT |
207 | config ARCH_FOOTBRIDGE |
208 | bool "FootBridge" | |
209 | select FOOTBRIDGE | |
f999b8bd MM |
210 | help |
211 | Support for systems based on the DC21285 companion chip | |
212 | ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. | |
1da177e4 | 213 | |
4af6fee1 DS |
214 | config ARCH_NETX |
215 | bool "Hilscher NetX based" | |
216 | select ARM_VIC | |
f999b8bd | 217 | help |
4af6fee1 DS |
218 | This enables support for systems based on the Hilscher NetX Soc |
219 | ||
220 | config ARCH_H720X | |
221 | bool "Hynix HMS720x-based" | |
222 | select ISA_DMA_API | |
223 | help | |
224 | This enables support for systems based on the Hynix HMS720x | |
225 | ||
226 | config ARCH_IMX | |
227 | bool "IMX" | |
228 | help | |
229 | Support for Motorola's i.MX family of processors (MX1, MXL). | |
1da177e4 | 230 | |
3f7e5815 LB |
231 | config ARCH_IOP32X |
232 | bool "IOP32x-based" | |
a4f7e763 | 233 | depends on MMU |
7ae1f7ec | 234 | select PLAT_IOP |
f7e68bbf | 235 | select PCI |
f999b8bd | 236 | help |
3f7e5815 LB |
237 | Support for Intel's 80219 and IOP32X (XScale) family of |
238 | processors. | |
239 | ||
240 | config ARCH_IOP33X | |
241 | bool "IOP33x-based" | |
242 | depends on MMU | |
7ae1f7ec | 243 | select PLAT_IOP |
3f7e5815 LB |
244 | select PCI |
245 | help | |
246 | Support for Intel's IOP33X (XScale) family of processors. | |
1da177e4 | 247 | |
285f5fa7 DW |
248 | config ARCH_IOP13XX |
249 | bool "IOP13xx-based" | |
588ef769 DW |
250 | depends on MMU |
251 | select PLAT_IOP | |
285f5fa7 DW |
252 | select PCI |
253 | help | |
254 | Support for Intel's IOP13XX (XScale) family of processors. | |
255 | ||
1da177e4 LT |
256 | config ARCH_IXP4XX |
257 | bool "IXP4xx-based" | |
a4f7e763 | 258 | depends on MMU |
84904d0e | 259 | select GENERIC_TIME |
f999b8bd MM |
260 | help |
261 | Support for Intel's IXP4XX (XScale) family of processors. | |
1da177e4 LT |
262 | |
263 | config ARCH_IXP2000 | |
264 | bool "IXP2400/2800-based" | |
a4f7e763 | 265 | depends on MMU |
f7e68bbf | 266 | select PCI |
f999b8bd MM |
267 | help |
268 | Support for Intel's IXP2400/2800 (XScale) family of processors. | |
1da177e4 | 269 | |
c4713074 LB |
270 | config ARCH_IXP23XX |
271 | bool "IXP23XX-based" | |
a4f7e763 | 272 | depends on MMU |
c4713074 LB |
273 | select PCI |
274 | help | |
275 | Support for Intel's IXP23xx (XScale) family of processors. | |
276 | ||
1da177e4 LT |
277 | config ARCH_L7200 |
278 | bool "LinkUp-L7200" | |
279 | select FIQ | |
280 | help | |
281 | Say Y here if you intend to run this kernel on a LinkUp Systems | |
282 | L7200 Software Development Board which uses an ARM720T processor. | |
283 | Information on this board can be obtained at: | |
284 | ||
285 | <http://www.linkupsys.com/> | |
286 | ||
287 | If you have any questions or comments about the Linux kernel port | |
288 | to this board, send e-mail to <sjhill@cotw.com>. | |
289 | ||
9918cda5 UKK |
290 | config ARCH_NS9XXX |
291 | bool "NetSilicon NS9xxx" | |
292 | help | |
293 | Say Y here if you intend to run this kernel on a NetSilicon NS9xxx | |
294 | System. | |
295 | ||
296 | <http://www.digi.com/products/microprocessors/index.jsp> | |
297 | ||
4af6fee1 DS |
298 | config ARCH_PNX4008 |
299 | bool "Philips Nexperia PNX4008 Mobile" | |
300 | help | |
301 | This enables support for Philips PNX4008 mobile platform. | |
302 | ||
1da177e4 LT |
303 | config ARCH_PXA |
304 | bool "PXA2xx-based" | |
a4f7e763 | 305 | depends on MMU |
034d2f5a | 306 | select ARCH_MTD_XIP |
45cf5eef | 307 | select GENERIC_TIME |
f999b8bd MM |
308 | help |
309 | Support for Intel's PXA2XX processor line. | |
1da177e4 LT |
310 | |
311 | config ARCH_RPC | |
312 | bool "RiscPC" | |
313 | select ARCH_ACORN | |
314 | select FIQ | |
315 | select TIMER_ACORN | |
a08b6b79 | 316 | select ARCH_MAY_HAVE_PC_FDC |
065909b9 | 317 | select ISA_DMA_API |
5ea81769 | 318 | select NO_IOPORT |
1da177e4 LT |
319 | help |
320 | On the Acorn Risc-PC, Linux can support the internal IDE disk and | |
321 | CD-ROM interface, serial and parallel port, and the floppy drive. | |
322 | ||
323 | config ARCH_SA1100 | |
324 | bool "SA1100-based" | |
f7e68bbf | 325 | select ISA |
3cd9e19e | 326 | select ARCH_DISCONTIGMEM_ENABLE |
034d2f5a | 327 | select ARCH_MTD_XIP |
f999b8bd MM |
328 | help |
329 | Support for StrongARM 11x0 based boards. | |
1da177e4 LT |
330 | |
331 | config ARCH_S3C2410 | |
e4d06e39 | 332 | bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443" |
1da177e4 LT |
333 | help |
334 | Samsung S3C2410X CPU based systems, such as the Simtec Electronics | |
335 | BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or | |
f6c8965a | 336 | the Samsung SMDK2410 development board (and derivatives). |
1da177e4 LT |
337 | |
338 | config ARCH_SHARK | |
339 | bool "Shark" | |
f7e68bbf RK |
340 | select ISA |
341 | select ISA_DMA | |
342 | select PCI | |
f999b8bd MM |
343 | help |
344 | Support for the StrongARM based Digital DNARD machine, also known | |
345 | as "Shark" (<http://www.shark-linux.de/shark.html>). | |
1da177e4 LT |
346 | |
347 | config ARCH_LH7A40X | |
348 | bool "Sharp LH7A40X" | |
349 | help | |
350 | Say Y here for systems based on one of the Sharp LH7A40X | |
351 | System on a Chip processors. These CPUs include an ARM922T | |
352 | core with a wide array of integrated devices for | |
353 | hand-held and low-power applications. | |
354 | ||
355 | config ARCH_OMAP | |
356 | bool "TI OMAP" | |
f999b8bd MM |
357 | help |
358 | Support for TI's OMAP platform (OMAP1 and OMAP2). | |
1da177e4 | 359 | |
1da177e4 LT |
360 | endchoice |
361 | ||
362 | source "arch/arm/mach-clps711x/Kconfig" | |
363 | ||
e7736d47 LB |
364 | source "arch/arm/mach-ep93xx/Kconfig" |
365 | ||
1da177e4 LT |
366 | source "arch/arm/mach-footbridge/Kconfig" |
367 | ||
368 | source "arch/arm/mach-integrator/Kconfig" | |
369 | ||
3f7e5815 LB |
370 | source "arch/arm/mach-iop32x/Kconfig" |
371 | ||
372 | source "arch/arm/mach-iop33x/Kconfig" | |
1da177e4 | 373 | |
285f5fa7 DW |
374 | source "arch/arm/mach-iop13xx/Kconfig" |
375 | ||
1da177e4 LT |
376 | source "arch/arm/mach-ixp4xx/Kconfig" |
377 | ||
378 | source "arch/arm/mach-ixp2000/Kconfig" | |
379 | ||
c4713074 LB |
380 | source "arch/arm/mach-ixp23xx/Kconfig" |
381 | ||
1da177e4 LT |
382 | source "arch/arm/mach-pxa/Kconfig" |
383 | ||
384 | source "arch/arm/mach-sa1100/Kconfig" | |
385 | ||
d48af15e TL |
386 | source "arch/arm/plat-omap/Kconfig" |
387 | ||
388 | source "arch/arm/mach-omap1/Kconfig" | |
1da177e4 | 389 | |
1dbae815 TL |
390 | source "arch/arm/mach-omap2/Kconfig" |
391 | ||
a21765a7 BD |
392 | source "arch/arm/plat-s3c24xx/Kconfig" |
393 | ||
394 | if ARCH_S3C2410 | |
395 | source "arch/arm/mach-s3c2400/Kconfig" | |
1da177e4 | 396 | source "arch/arm/mach-s3c2410/Kconfig" |
a21765a7 BD |
397 | source "arch/arm/mach-s3c2412/Kconfig" |
398 | source "arch/arm/mach-s3c2440/Kconfig" | |
399 | source "arch/arm/mach-s3c2442/Kconfig" | |
e4d06e39 | 400 | source "arch/arm/mach-s3c2443/Kconfig" |
a21765a7 | 401 | endif |
1da177e4 LT |
402 | |
403 | source "arch/arm/mach-lh7a40x/Kconfig" | |
404 | ||
405 | source "arch/arm/mach-imx/Kconfig" | |
406 | ||
407 | source "arch/arm/mach-h720x/Kconfig" | |
408 | ||
409 | source "arch/arm/mach-versatile/Kconfig" | |
410 | ||
038c5b60 BN |
411 | source "arch/arm/mach-aaec2000/Kconfig" |
412 | ||
8ad68bbf CM |
413 | source "arch/arm/mach-realview/Kconfig" |
414 | ||
9d041268 | 415 | source "arch/arm/mach-at91/Kconfig" |
73a59c1c | 416 | |
bb6d8c88 SH |
417 | source "arch/arm/mach-netx/Kconfig" |
418 | ||
9918cda5 UKK |
419 | source "arch/arm/mach-ns9xxx/Kconfig" |
420 | ||
1da177e4 LT |
421 | # Definitions to make life easier |
422 | config ARCH_ACORN | |
423 | bool | |
424 | ||
7ae1f7ec LB |
425 | config PLAT_IOP |
426 | bool | |
427 | ||
1da177e4 LT |
428 | source arch/arm/mm/Kconfig |
429 | ||
afe4b25e LB |
430 | config IWMMXT |
431 | bool "Enable iWMMXt support" | |
6340aa61 | 432 | depends on CPU_XSCALE || CPU_XSC3 |
afe4b25e LB |
433 | default y if PXA27x |
434 | help | |
435 | Enable support for iWMMXt context switching at run time if | |
436 | running on a CPU that supports it. | |
437 | ||
1da177e4 LT |
438 | # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER |
439 | config XSCALE_PMU | |
440 | bool | |
441 | depends on CPU_XSCALE && !XSCALE_PMU_TIMER | |
442 | default y | |
443 | ||
3b93e7b0 HC |
444 | if !MMU |
445 | source "arch/arm/Kconfig-nommu" | |
446 | endif | |
447 | ||
1da177e4 LT |
448 | endmenu |
449 | ||
450 | source "arch/arm/common/Kconfig" | |
451 | ||
452 | config FORCE_MAX_ZONEORDER | |
453 | int | |
454 | depends on SA1111 | |
455 | default "9" | |
456 | ||
457 | menu "Bus support" | |
458 | ||
459 | config ARM_AMBA | |
460 | bool | |
461 | ||
462 | config ISA | |
463 | bool | |
1da177e4 LT |
464 | help |
465 | Find out whether you have ISA slots on your motherboard. ISA is the | |
466 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
467 | inside your box. Other bus systems are PCI, EISA, MicroChannel | |
468 | (MCA) or VESA. ISA is an older system, now being displaced by PCI; | |
469 | newer boards don't support it. If you have ISA, say Y, otherwise N. | |
470 | ||
065909b9 | 471 | # Select ISA DMA controller support |
1da177e4 LT |
472 | config ISA_DMA |
473 | bool | |
065909b9 | 474 | select ISA_DMA_API |
1da177e4 | 475 | |
065909b9 | 476 | # Select ISA DMA interface |
5cae841b AV |
477 | config ISA_DMA_API |
478 | bool | |
5cae841b | 479 | |
1da177e4 | 480 | config PCI |
68939121 | 481 | bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX |
1da177e4 LT |
482 | help |
483 | Find out whether you have a PCI motherboard. PCI is the name of a | |
484 | bus system, i.e. the way the CPU talks to the other stuff inside | |
485 | your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or | |
486 | VESA. If you have PCI, say Y, otherwise N. | |
487 | ||
488 | The PCI-HOWTO, available from | |
489 | <http://www.tldp.org/docs.html#howto>, contains valuable | |
490 | information about which PCI hardware does work under Linux and which | |
491 | doesn't. | |
492 | ||
493 | # Select the host bridge type | |
494 | config PCI_HOST_VIA82C505 | |
495 | bool | |
496 | depends on PCI && ARCH_SHARK | |
497 | default y | |
498 | ||
499 | source "drivers/pci/Kconfig" | |
500 | ||
501 | source "drivers/pcmcia/Kconfig" | |
502 | ||
503 | endmenu | |
504 | ||
505 | menu "Kernel Features" | |
506 | ||
507 | config SMP | |
508 | bool "Symmetric Multi-Processing (EXPERIMENTAL)" | |
f6db449c | 509 | depends on EXPERIMENTAL && REALVIEW_MPCORE |
1da177e4 LT |
510 | help |
511 | This enables support for systems with more than one CPU. If you have | |
512 | a system with only one CPU, like most personal computers, say N. If | |
513 | you have a system with more than one CPU, say Y. | |
514 | ||
515 | If you say N here, the kernel will run on single and multiprocessor | |
516 | machines, but will use only one CPU of a multiprocessor machine. If | |
517 | you say Y here, the kernel will run on many, but not all, single | |
518 | processor machines. On a single processor machine, the kernel will | |
519 | run faster if you say N here. | |
520 | ||
12c62c2e AO |
521 | See also the <file:Documentation/smp.txt>, |
522 | <file:Documentation/i386/IO-APIC.txt>, | |
1da177e4 LT |
523 | <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at |
524 | <http://www.linuxdoc.org/docs.html#howto>. | |
525 | ||
526 | If you don't know what to do here, say N. | |
527 | ||
528 | config NR_CPUS | |
529 | int "Maximum number of CPUs (2-32)" | |
530 | range 2 32 | |
531 | depends on SMP | |
532 | default "4" | |
533 | ||
a054a811 RK |
534 | config HOTPLUG_CPU |
535 | bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" | |
536 | depends on SMP && HOTPLUG && EXPERIMENTAL | |
537 | help | |
538 | Say Y here to experiment with turning CPUs off and on. CPUs | |
539 | can be controlled through /sys/devices/system/cpu. | |
540 | ||
37ee16ae RK |
541 | config LOCAL_TIMERS |
542 | bool "Use local timer interrupts" | |
2a98beb6 | 543 | depends on SMP && REALVIEW_MPCORE |
37ee16ae RK |
544 | default y |
545 | help | |
546 | Enable support for local timers on SMP platforms, rather then the | |
547 | legacy IPI broadcast method. Local timers allows the system | |
548 | accounting to be spread across the timer interval, preventing a | |
549 | "thundering herd" at every timer tick. | |
550 | ||
1da177e4 LT |
551 | config PREEMPT |
552 | bool "Preemptible Kernel (EXPERIMENTAL)" | |
553 | depends on EXPERIMENTAL | |
554 | help | |
555 | This option reduces the latency of the kernel when reacting to | |
556 | real-time or interactive events by allowing a low priority process to | |
557 | be preempted even if it is in kernel mode executing a system call. | |
558 | This allows applications to run more reliably even when the system is | |
559 | under load. | |
560 | ||
561 | Say Y here if you are building a kernel for a desktop, embedded | |
562 | or real-time system. Say N if you are unsure. | |
563 | ||
8749af68 RK |
564 | config NO_IDLE_HZ |
565 | bool "Dynamic tick timer" | |
566 | help | |
567 | Select this option if you want to disable continuous timer ticks | |
568 | and have them programmed to occur as required. This option saves | |
569 | power as the system can remain in idle state for longer. | |
570 | ||
571 | By default dynamic tick is disabled during the boot, and can be | |
572 | manually enabled with: | |
573 | ||
574 | echo 1 > /sys/devices/system/timer/timer0/dyn_tick | |
575 | ||
576 | Alternatively, if you want dynamic tick automatically enabled | |
577 | during boot, pass "dyntick=enable" via the kernel command string. | |
578 | ||
f2be64b3 TL |
579 | Please note that dynamic tick may affect the accuracy of |
580 | timekeeping on some platforms depending on the implementation. | |
569d2c34 NP |
581 | Currently at least OMAP, PXA2xx and SA11x0 platforms are known |
582 | to have accurate timekeeping with dynamic tick. | |
f2be64b3 | 583 | |
f8065813 RK |
584 | config HZ |
585 | int | |
586 | default 128 if ARCH_L7200 | |
587 | default 200 if ARCH_EBSA110 || ARCH_S3C2410 | |
bfe65704 | 588 | default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER |
f8065813 RK |
589 | default 100 |
590 | ||
704bdda0 NP |
591 | config AEABI |
592 | bool "Use the ARM EABI to compile the kernel" | |
593 | help | |
594 | This option allows for the kernel to be compiled using the latest | |
595 | ARM ABI (aka EABI). This is only useful if you are using a user | |
596 | space environment that is also compiled with EABI. | |
597 | ||
598 | Since there are major incompatibilities between the legacy ABI and | |
599 | EABI, especially with regard to structure member alignment, this | |
600 | option also changes the kernel syscall calling convention to | |
601 | disambiguate both ABIs and allow for backward compatibility support | |
602 | (selected with CONFIG_OABI_COMPAT). | |
603 | ||
604 | To use this you need GCC version 4.0.0 or later. | |
605 | ||
6c90c872 | 606 | config OABI_COMPAT |
a73a3ff1 | 607 | bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" |
61c484d4 | 608 | depends on AEABI && EXPERIMENTAL |
6c90c872 NP |
609 | default y |
610 | help | |
611 | This option preserves the old syscall interface along with the | |
612 | new (ARM EABI) one. It also provides a compatibility layer to | |
613 | intercept syscalls that have structure arguments which layout | |
614 | in memory differs between the legacy ABI and the new ARM EABI | |
615 | (only for non "thumb" binaries). This option adds a tiny | |
616 | overhead to all syscalls and produces a slightly larger kernel. | |
617 | If you know you'll be using only pure EABI user space then you | |
618 | can say N here. If this option is not selected and you attempt | |
619 | to execute a legacy ABI binary then the result will be | |
620 | UNPREDICTABLE (in fact it can be predicted that it won't work | |
621 | at all). If in doubt say Y. | |
622 | ||
3f22ab27 | 623 | config ARCH_DISCONTIGMEM_ENABLE |
1da177e4 | 624 | bool |
f7e68bbf | 625 | default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM) |
1da177e4 LT |
626 | help |
627 | Say Y to support efficient handling of discontiguous physical memory, | |
628 | for architectures which are either NUMA (Non-Uniform Memory Access) | |
629 | or have huge holes in the physical address space for other reasons. | |
630 | See <file:Documentation/vm/numa> for more. | |
631 | ||
c80d79d7 YG |
632 | config NODES_SHIFT |
633 | int | |
634 | default "4" if ARCH_LH7A40X | |
635 | default "2" | |
636 | depends on NEED_MULTIPLE_NODES | |
637 | ||
3f22ab27 DH |
638 | source "mm/Kconfig" |
639 | ||
1da177e4 LT |
640 | config LEDS |
641 | bool "Timer and CPU usage LEDs" | |
642 | depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \ | |
643 | ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \ | |
644 | ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ | |
645 | ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ | |
73a59c1c | 646 | ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \ |
58a0cd78 | 647 | ARCH_AT91 || MACH_TRIZEPS4 |
1da177e4 LT |
648 | help |
649 | If you say Y here, the LEDs on your machine will be used | |
650 | to provide useful information about your current system status. | |
651 | ||
652 | If you are compiling a kernel for a NetWinder or EBSA-285, you will | |
653 | be able to select which LEDs are active using the options below. If | |
654 | you are compiling a kernel for the EBSA-110 or the LART however, the | |
655 | red LED will simply flash regularly to indicate that the system is | |
656 | still functional. It is safe to say Y here if you have a CATS | |
657 | system, but the driver will do nothing. | |
658 | ||
659 | config LEDS_TIMER | |
660 | bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ | |
661 | MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 | |
662 | depends on LEDS | |
663 | default y if ARCH_EBSA110 | |
664 | help | |
665 | If you say Y here, one of the system LEDs (the green one on the | |
666 | NetWinder, the amber one on the EBSA285, or the red one on the LART) | |
667 | will flash regularly to indicate that the system is still | |
668 | operational. This is mainly useful to kernel hackers who are | |
669 | debugging unstable kernels. | |
670 | ||
671 | The LART uses the same LED for both Timer LED and CPU usage LED | |
672 | functions. You may choose to use both, but the Timer LED function | |
673 | will overrule the CPU usage LED. | |
674 | ||
675 | config LEDS_CPU | |
676 | bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ | |
677 | !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 | |
678 | depends on LEDS | |
679 | help | |
680 | If you say Y here, the red LED will be used to give a good real | |
681 | time indication of CPU usage, by lighting whenever the idle task | |
682 | is not currently executing. | |
683 | ||
684 | The LART uses the same LED for both Timer LED and CPU usage LED | |
685 | functions. You may choose to use both, but the Timer LED function | |
686 | will overrule the CPU usage LED. | |
687 | ||
688 | config ALIGNMENT_TRAP | |
689 | bool | |
f12d0d7c | 690 | depends on CPU_CP15_MMU |
1da177e4 LT |
691 | default y if !ARCH_EBSA110 |
692 | help | |
84eb8d06 | 693 | ARM processors cannot fetch/store information which is not |
1da177e4 LT |
694 | naturally aligned on the bus, i.e., a 4 byte fetch must start at an |
695 | address divisible by 4. On 32-bit ARM processors, these non-aligned | |
696 | fetch/store instructions will be emulated in software if you say | |
697 | here, which has a severe performance impact. This is necessary for | |
698 | correct operation of some network protocols. With an IP-only | |
699 | configuration it is safe to say N, otherwise say Y. | |
700 | ||
701 | endmenu | |
702 | ||
703 | menu "Boot options" | |
704 | ||
705 | # Compressed boot loader in ROM. Yes, we really want to ask about | |
706 | # TEXT and BSS so we preserve their values in the config files. | |
707 | config ZBOOT_ROM_TEXT | |
708 | hex "Compressed ROM boot loader base address" | |
709 | default "0" | |
710 | help | |
711 | The physical address at which the ROM-able zImage is to be | |
712 | placed in the target. Platforms which normally make use of | |
713 | ROM-able zImage formats normally set this to a suitable | |
714 | value in their defconfig file. | |
715 | ||
716 | If ZBOOT_ROM is not enabled, this has no effect. | |
717 | ||
718 | config ZBOOT_ROM_BSS | |
719 | hex "Compressed ROM boot loader BSS address" | |
720 | default "0" | |
721 | help | |
f8c440b2 DF |
722 | The base address of an area of read/write memory in the target |
723 | for the ROM-able zImage which must be available while the | |
724 | decompressor is running. It must be large enough to hold the | |
725 | entire decompressed kernel plus an additional 128 KiB. | |
726 | Platforms which normally make use of ROM-able zImage formats | |
727 | normally set this to a suitable value in their defconfig file. | |
1da177e4 LT |
728 | |
729 | If ZBOOT_ROM is not enabled, this has no effect. | |
730 | ||
731 | config ZBOOT_ROM | |
732 | bool "Compressed boot loader in ROM/flash" | |
733 | depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS | |
734 | help | |
735 | Say Y here if you intend to execute your compressed kernel image | |
736 | (zImage) directly from ROM or flash. If unsure, say N. | |
737 | ||
738 | config CMDLINE | |
739 | string "Default kernel command string" | |
740 | default "" | |
741 | help | |
742 | On some architectures (EBSA110 and CATS), there is currently no way | |
743 | for the boot loader to pass arguments to the kernel. For these | |
744 | architectures, you should supply some command-line options at build | |
745 | time by entering them here. As a minimum, you should specify the | |
746 | memory size and the root device (e.g., mem=64M root=/dev/nfs). | |
747 | ||
748 | config XIP_KERNEL | |
749 | bool "Kernel Execute-In-Place from ROM" | |
750 | depends on !ZBOOT_ROM | |
751 | help | |
752 | Execute-In-Place allows the kernel to run from non-volatile storage | |
753 | directly addressable by the CPU, such as NOR flash. This saves RAM | |
754 | space since the text section of the kernel is not loaded from flash | |
755 | to RAM. Read-write sections, such as the data section and stack, | |
756 | are still copied to RAM. The XIP kernel is not compressed since | |
757 | it has to run directly from flash, so it will take more space to | |
758 | store it. The flash address used to link the kernel object files, | |
759 | and for storing it, is configuration dependent. Therefore, if you | |
760 | say Y here, you must know the proper physical address where to | |
761 | store the kernel image depending on your own flash memory usage. | |
762 | ||
763 | Also note that the make target becomes "make xipImage" rather than | |
764 | "make zImage" or "make Image". The final kernel binary to put in | |
765 | ROM memory will be arch/arm/boot/xipImage. | |
766 | ||
767 | If unsure, say N. | |
768 | ||
769 | config XIP_PHYS_ADDR | |
770 | hex "XIP Kernel Physical Location" | |
771 | depends on XIP_KERNEL | |
772 | default "0x00080000" | |
773 | help | |
774 | This is the physical address in your flash memory the kernel will | |
775 | be linked for and stored to. This address is dependent on your | |
776 | own flash usage. | |
777 | ||
c587e4a6 RP |
778 | config KEXEC |
779 | bool "Kexec system call (EXPERIMENTAL)" | |
780 | depends on EXPERIMENTAL | |
781 | help | |
782 | kexec is a system call that implements the ability to shutdown your | |
783 | current kernel, and to start another kernel. It is like a reboot | |
784 | but it is indepedent of the system firmware. And like a reboot | |
785 | you can start any kernel with it, not just Linux. | |
786 | ||
787 | It is an ongoing process to be certain the hardware in a machine | |
788 | is properly shutdown, so do not be surprised if this code does not | |
789 | initially work for you. It may help to enable device hotplugging | |
790 | support. | |
791 | ||
1da177e4 LT |
792 | endmenu |
793 | ||
3c8cd0cc | 794 | if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX ) |
1da177e4 LT |
795 | |
796 | menu "CPU Frequency scaling" | |
797 | ||
798 | source "drivers/cpufreq/Kconfig" | |
799 | ||
800 | config CPU_FREQ_SA1100 | |
801 | bool | |
07c6d48f | 802 | depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT) |
1da177e4 LT |
803 | default y |
804 | ||
805 | config CPU_FREQ_SA1110 | |
806 | bool | |
807 | depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3) | |
808 | default y | |
809 | ||
810 | config CPU_FREQ_INTEGRATOR | |
811 | tristate "CPUfreq driver for ARM Integrator CPUs" | |
812 | depends on ARCH_INTEGRATOR && CPU_FREQ | |
813 | default y | |
814 | help | |
815 | This enables the CPUfreq driver for ARM Integrator CPUs. | |
816 | ||
817 | For details, take a look at <file:Documentation/cpu-freq>. | |
818 | ||
819 | If in doubt, say Y. | |
820 | ||
3c8cd0cc PP |
821 | config CPU_FREQ_IMX |
822 | tristate "CPUfreq driver for i.MX CPUs" | |
823 | depends on ARCH_IMX && CPU_FREQ | |
824 | default n | |
825 | help | |
826 | This enables the CPUfreq driver for i.MX CPUs. | |
827 | ||
828 | If in doubt, say N. | |
829 | ||
1da177e4 LT |
830 | endmenu |
831 | ||
832 | endif | |
833 | ||
834 | menu "Floating point emulation" | |
835 | ||
836 | comment "At least one emulation must be selected" | |
837 | ||
838 | config FPE_NWFPE | |
839 | bool "NWFPE math emulation" | |
8993a44c | 840 | depends on !AEABI || OABI_COMPAT |
1da177e4 LT |
841 | ---help--- |
842 | Say Y to include the NWFPE floating point emulator in the kernel. | |
843 | This is necessary to run most binaries. Linux does not currently | |
844 | support floating point hardware so you need to say Y here even if | |
845 | your machine has an FPA or floating point co-processor podule. | |
846 | ||
847 | You may say N here if you are going to load the Acorn FPEmulator | |
848 | early in the bootup. | |
849 | ||
850 | config FPE_NWFPE_XP | |
851 | bool "Support extended precision" | |
bedf142b | 852 | depends on FPE_NWFPE |
1da177e4 LT |
853 | help |
854 | Say Y to include 80-bit support in the kernel floating-point | |
855 | emulator. Otherwise, only 32 and 64-bit support is compiled in. | |
856 | Note that gcc does not generate 80-bit operations by default, | |
857 | so in most cases this option only enlarges the size of the | |
858 | floating point emulator without any good reason. | |
859 | ||
860 | You almost surely want to say N here. | |
861 | ||
862 | config FPE_FASTFPE | |
863 | bool "FastFPE math emulation (EXPERIMENTAL)" | |
8993a44c | 864 | depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL |
1da177e4 LT |
865 | ---help--- |
866 | Say Y here to include the FAST floating point emulator in the kernel. | |
867 | This is an experimental much faster emulator which now also has full | |
868 | precision for the mantissa. It does not support any exceptions. | |
869 | It is very simple, and approximately 3-6 times faster than NWFPE. | |
870 | ||
871 | It should be sufficient for most programs. It may be not suitable | |
872 | for scientific calculations, but you have to check this for yourself. | |
873 | If you do not feel you need a faster FP emulation you should better | |
874 | choose NWFPE. | |
875 | ||
876 | config VFP | |
877 | bool "VFP-format floating point maths" | |
878 | depends on CPU_V6 || CPU_ARM926T | |
879 | help | |
880 | Say Y to include VFP support code in the kernel. This is needed | |
881 | if your hardware includes a VFP unit. | |
882 | ||
883 | Please see <file:Documentation/arm/VFP/release-notes.txt> for | |
884 | release notes and additional status information. | |
885 | ||
886 | Say N if your target does not have VFP hardware. | |
887 | ||
888 | endmenu | |
889 | ||
890 | menu "Userspace binary formats" | |
891 | ||
892 | source "fs/Kconfig.binfmt" | |
893 | ||
894 | config ARTHUR | |
895 | tristate "RISC OS personality" | |
704bdda0 | 896 | depends on !AEABI |
1da177e4 LT |
897 | help |
898 | Say Y here to include the kernel code necessary if you want to run | |
899 | Acorn RISC OS/Arthur binaries under Linux. This code is still very | |
900 | experimental; if this sounds frightening, say N and sleep in peace. | |
901 | You can also say M here to compile this support as a module (which | |
902 | will be called arthur). | |
903 | ||
904 | endmenu | |
905 | ||
906 | menu "Power management options" | |
907 | ||
eceab4ac | 908 | source "kernel/power/Kconfig" |
1da177e4 | 909 | |
1da177e4 LT |
910 | endmenu |
911 | ||
d5950b43 SR |
912 | source "net/Kconfig" |
913 | ||
1da177e4 LT |
914 | menu "Device Drivers" |
915 | ||
916 | source "drivers/base/Kconfig" | |
917 | ||
c35bf4a5 PM |
918 | source "drivers/connector/Kconfig" |
919 | ||
f12d0d7c | 920 | if ALIGNMENT_TRAP || !CPU_CP15_MMU |
1da177e4 LT |
921 | source "drivers/mtd/Kconfig" |
922 | endif | |
923 | ||
924 | source "drivers/parport/Kconfig" | |
925 | ||
926 | source "drivers/pnp/Kconfig" | |
927 | ||
928 | source "drivers/block/Kconfig" | |
929 | ||
930 | source "drivers/acorn/block/Kconfig" | |
931 | ||
3f7e5815 | 932 | if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \ |
bb011b8e | 933 | || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \ |
c4713074 LB |
934 | || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \ |
935 | || ARCH_IXP23XX | |
1da177e4 LT |
936 | source "drivers/ide/Kconfig" |
937 | endif | |
938 | ||
939 | source "drivers/scsi/Kconfig" | |
940 | ||
eb370f0b MM |
941 | source "drivers/ata/Kconfig" |
942 | ||
1da177e4 LT |
943 | source "drivers/md/Kconfig" |
944 | ||
945 | source "drivers/message/fusion/Kconfig" | |
946 | ||
947 | source "drivers/ieee1394/Kconfig" | |
948 | ||
949 | source "drivers/message/i2o/Kconfig" | |
950 | ||
d5950b43 | 951 | source "drivers/net/Kconfig" |
1da177e4 LT |
952 | |
953 | source "drivers/isdn/Kconfig" | |
954 | ||
955 | # input before char - char/joystick depends on it. As does USB. | |
956 | ||
957 | source "drivers/input/Kconfig" | |
958 | ||
959 | source "drivers/char/Kconfig" | |
960 | ||
961 | source "drivers/i2c/Kconfig" | |
962 | ||
8ae12a0d DB |
963 | source "drivers/spi/Kconfig" |
964 | ||
04916c0e AZ |
965 | source "drivers/w1/Kconfig" |
966 | ||
ad2f931d JD |
967 | source "drivers/hwmon/Kconfig" |
968 | ||
1da177e4 LT |
969 | #source "drivers/l3/Kconfig" |
970 | ||
971 | source "drivers/misc/Kconfig" | |
972 | ||
a4e137ab RK |
973 | source "drivers/mfd/Kconfig" |
974 | ||
c72a1d60 RP |
975 | source "drivers/leds/Kconfig" |
976 | ||
1da177e4 LT |
977 | source "drivers/media/Kconfig" |
978 | ||
979 | source "drivers/video/Kconfig" | |
980 | ||
981 | source "sound/Kconfig" | |
982 | ||
c2dade51 SH |
983 | source "drivers/hid/Kconfig" |
984 | ||
1da177e4 LT |
985 | source "drivers/usb/Kconfig" |
986 | ||
987 | source "drivers/mmc/Kconfig" | |
988 | ||
12b824fb AZ |
989 | source "drivers/rtc/Kconfig" |
990 | ||
1da177e4 LT |
991 | endmenu |
992 | ||
993 | source "fs/Kconfig" | |
994 | ||
995 | source "arch/arm/oprofile/Kconfig" | |
996 | ||
997 | source "arch/arm/Kconfig.debug" | |
998 | ||
999 | source "security/Kconfig" | |
1000 | ||
1001 | source "crypto/Kconfig" | |
1002 | ||
1003 | source "lib/Kconfig" |