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 | ||
0a938b97 DB |
24 | config GENERIC_GPIO |
25 | bool | |
26 | default n | |
27 | ||
746140c7 KH |
28 | config GENERIC_TIME |
29 | bool | |
30 | default n | |
31 | ||
1da177e4 LT |
32 | config MMU |
33 | bool | |
34 | default y | |
35 | ||
5ea81769 AV |
36 | config NO_IOPORT |
37 | bool | |
38 | default n | |
39 | ||
1da177e4 LT |
40 | config EISA |
41 | bool | |
42 | ---help--- | |
43 | The Extended Industry Standard Architecture (EISA) bus was | |
44 | developed as an open alternative to the IBM MicroChannel bus. | |
45 | ||
46 | The EISA bus provided some of the features of the IBM MicroChannel | |
47 | bus while maintaining backward compatibility with cards made for | |
48 | the older ISA bus. The EISA bus saw limited use between 1988 and | |
49 | 1995 when it was made obsolete by the PCI bus. | |
50 | ||
51 | Say Y here if you are building a kernel for an EISA-based machine. | |
52 | ||
53 | Otherwise, say N. | |
54 | ||
55 | config SBUS | |
56 | bool | |
57 | ||
58 | config MCA | |
59 | bool | |
60 | help | |
61 | MicroChannel Architecture is found in some IBM PS/2 machines and | |
62 | laptops. It is a bus system similar to PCI or ISA. See | |
63 | <file:Documentation/mca.txt> (and especially the web page given | |
64 | there) before attempting to build an MCA bus kernel. | |
65 | ||
4a2581a0 TG |
66 | config GENERIC_HARDIRQS |
67 | bool | |
68 | default y | |
69 | ||
7ad1bcb2 RK |
70 | config TRACE_IRQFLAGS_SUPPORT |
71 | bool | |
72 | default y | |
73 | ||
4a2581a0 TG |
74 | config HARDIRQS_SW_RESEND |
75 | bool | |
76 | default y | |
77 | ||
78 | config GENERIC_IRQ_PROBE | |
79 | bool | |
80 | default y | |
81 | ||
1da177e4 LT |
82 | config RWSEM_GENERIC_SPINLOCK |
83 | bool | |
84 | default y | |
85 | ||
86 | config RWSEM_XCHGADD_ALGORITHM | |
87 | bool | |
88 | ||
f0d1b0b3 DH |
89 | config ARCH_HAS_ILOG2_U32 |
90 | bool | |
91 | default n | |
92 | ||
93 | config ARCH_HAS_ILOG2_U64 | |
94 | bool | |
95 | default n | |
96 | ||
b89c3b16 AM |
97 | config GENERIC_HWEIGHT |
98 | bool | |
99 | default y | |
100 | ||
1da177e4 LT |
101 | config GENERIC_CALIBRATE_DELAY |
102 | bool | |
103 | default y | |
104 | ||
105 | config GENERIC_BUST_SPINLOCK | |
106 | bool | |
107 | ||
a08b6b79 Z |
108 | config ARCH_MAY_HAVE_PC_FDC |
109 | bool | |
110 | ||
5ac6da66 CL |
111 | config ZONE_DMA |
112 | bool | |
113 | default y | |
114 | ||
1da177e4 LT |
115 | config GENERIC_ISA_DMA |
116 | bool | |
117 | ||
1da177e4 LT |
118 | config FIQ |
119 | bool | |
120 | ||
034d2f5a AV |
121 | config ARCH_MTD_XIP |
122 | bool | |
123 | ||
c760fc19 HC |
124 | config VECTORS_BASE |
125 | hex | |
6afd6fae | 126 | default 0xffff0000 if MMU || CPU_HIGH_VECTOR |
c760fc19 HC |
127 | default DRAM_BASE if REMAP_VECTORS_TO_RAM |
128 | default 0x00000000 | |
129 | help | |
130 | The base address of exception vectors. | |
131 | ||
1da177e4 LT |
132 | source "init/Kconfig" |
133 | ||
134 | menu "System Type" | |
135 | ||
136 | choice | |
137 | prompt "ARM system type" | |
6a0e2430 | 138 | default ARCH_VERSATILE |
1da177e4 | 139 | |
4af6fee1 DS |
140 | config ARCH_AAEC2000 |
141 | bool "Agilent AAEC-2000 based" | |
142 | select ARM_AMBA | |
143 | help | |
144 | This enables support for systems based on the Agilent AAEC-2000 | |
145 | ||
146 | config ARCH_INTEGRATOR | |
147 | bool "ARM Ltd. Integrator family" | |
148 | select ARM_AMBA | |
149 | select ICST525 | |
150 | help | |
151 | Support for ARM's Integrator platform. | |
152 | ||
153 | config ARCH_REALVIEW | |
154 | bool "ARM Ltd. RealView family" | |
155 | select ARM_AMBA | |
156 | select ICST307 | |
157 | help | |
158 | This enables support for ARM Ltd RealView boards. | |
159 | ||
160 | config ARCH_VERSATILE | |
161 | bool "ARM Ltd. Versatile family" | |
162 | select ARM_AMBA | |
163 | select ARM_VIC | |
164 | select ICST307 | |
165 | help | |
166 | This enables support for ARM Ltd Versatile board. | |
167 | ||
8fc5ffa0 AV |
168 | config ARCH_AT91 |
169 | bool "Atmel AT91" | |
0a938b97 | 170 | select GENERIC_GPIO |
4af6fee1 | 171 | help |
8fc5ffa0 AV |
172 | This enables support for systems based on the Atmel AT91RM9200 |
173 | and AT91SAM9xxx processors. | |
4af6fee1 | 174 | |
1da177e4 | 175 | config ARCH_CLPS7500 |
4af6fee1 | 176 | bool "Cirrus CL-PS7500FE" |
1da177e4 | 177 | select TIMER_ACORN |
f7e68bbf | 178 | select ISA |
e4169889 | 179 | select NO_IOPORT |
f999b8bd MM |
180 | help |
181 | Support for the Cirrus Logic PS7500FE system-on-a-chip. | |
1da177e4 LT |
182 | |
183 | config ARCH_CLPS711X | |
4af6fee1 | 184 | bool "Cirrus Logic CLPS711x/EP721x-based" |
f999b8bd MM |
185 | help |
186 | Support for Cirrus Logic 711x/721x based boards. | |
1da177e4 LT |
187 | |
188 | config ARCH_CO285 | |
189 | bool "Co-EBSA285" | |
190 | select FOOTBRIDGE | |
191 | select FOOTBRIDGE_ADDIN | |
f999b8bd MM |
192 | help |
193 | Support for Intel's EBSA285 companion chip. | |
1da177e4 LT |
194 | |
195 | config ARCH_EBSA110 | |
196 | bool "EBSA-110" | |
f7e68bbf | 197 | select ISA |
c5eb2a2b | 198 | select NO_IOPORT |
1da177e4 LT |
199 | help |
200 | This is an evaluation board for the StrongARM processor available | |
f6c8965a | 201 | from Digital. It has limited hardware on-board, including an |
1da177e4 LT |
202 | Ethernet interface, two PCMCIA sockets, two serial ports and a |
203 | parallel port. | |
204 | ||
e7736d47 LB |
205 | config ARCH_EP93XX |
206 | bool "EP93xx-based" | |
207 | select ARM_AMBA | |
208 | select ARM_VIC | |
209 | help | |
210 | This enables support for the Cirrus EP93xx series of CPUs. | |
211 | ||
1da177e4 LT |
212 | config ARCH_FOOTBRIDGE |
213 | bool "FootBridge" | |
214 | select FOOTBRIDGE | |
f999b8bd MM |
215 | help |
216 | Support for systems based on the DC21285 companion chip | |
217 | ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. | |
1da177e4 | 218 | |
4af6fee1 DS |
219 | config ARCH_NETX |
220 | bool "Hilscher NetX based" | |
221 | select ARM_VIC | |
f999b8bd | 222 | help |
4af6fee1 DS |
223 | This enables support for systems based on the Hilscher NetX Soc |
224 | ||
225 | config ARCH_H720X | |
226 | bool "Hynix HMS720x-based" | |
227 | select ISA_DMA_API | |
228 | help | |
229 | This enables support for systems based on the Hynix HMS720x | |
230 | ||
231 | config ARCH_IMX | |
232 | bool "IMX" | |
233 | help | |
234 | Support for Motorola's i.MX family of processors (MX1, MXL). | |
1da177e4 | 235 | |
3f7e5815 LB |
236 | config ARCH_IOP32X |
237 | bool "IOP32x-based" | |
a4f7e763 | 238 | depends on MMU |
7ae1f7ec | 239 | select PLAT_IOP |
f7e68bbf | 240 | select PCI |
f999b8bd | 241 | help |
3f7e5815 LB |
242 | Support for Intel's 80219 and IOP32X (XScale) family of |
243 | processors. | |
244 | ||
245 | config ARCH_IOP33X | |
246 | bool "IOP33x-based" | |
247 | depends on MMU | |
7ae1f7ec | 248 | select PLAT_IOP |
3f7e5815 LB |
249 | select PCI |
250 | help | |
251 | Support for Intel's IOP33X (XScale) family of processors. | |
1da177e4 | 252 | |
285f5fa7 DW |
253 | config ARCH_IOP13XX |
254 | bool "IOP13xx-based" | |
588ef769 DW |
255 | depends on MMU |
256 | select PLAT_IOP | |
285f5fa7 DW |
257 | select PCI |
258 | help | |
259 | Support for Intel's IOP13XX (XScale) family of processors. | |
260 | ||
1da177e4 LT |
261 | config ARCH_IXP4XX |
262 | bool "IXP4xx-based" | |
a4f7e763 | 263 | depends on MMU |
84904d0e | 264 | select GENERIC_TIME |
f999b8bd MM |
265 | help |
266 | Support for Intel's IXP4XX (XScale) family of processors. | |
1da177e4 LT |
267 | |
268 | config ARCH_IXP2000 | |
269 | bool "IXP2400/2800-based" | |
a4f7e763 | 270 | depends on MMU |
f7e68bbf | 271 | select PCI |
f999b8bd MM |
272 | help |
273 | Support for Intel's IXP2400/2800 (XScale) family of processors. | |
1da177e4 | 274 | |
c4713074 LB |
275 | config ARCH_IXP23XX |
276 | bool "IXP23XX-based" | |
a4f7e763 | 277 | depends on MMU |
c4713074 LB |
278 | select PCI |
279 | help | |
280 | Support for Intel's IXP23xx (XScale) family of processors. | |
281 | ||
1da177e4 LT |
282 | config ARCH_L7200 |
283 | bool "LinkUp-L7200" | |
284 | select FIQ | |
285 | help | |
286 | Say Y here if you intend to run this kernel on a LinkUp Systems | |
287 | L7200 Software Development Board which uses an ARM720T processor. | |
288 | Information on this board can be obtained at: | |
289 | ||
290 | <http://www.linkupsys.com/> | |
291 | ||
292 | If you have any questions or comments about the Linux kernel port | |
293 | to this board, send e-mail to <sjhill@cotw.com>. | |
294 | ||
9918cda5 UKK |
295 | config ARCH_NS9XXX |
296 | bool "NetSilicon NS9xxx" | |
297 | help | |
298 | Say Y here if you intend to run this kernel on a NetSilicon NS9xxx | |
299 | System. | |
300 | ||
301 | <http://www.digi.com/products/microprocessors/index.jsp> | |
302 | ||
4af6fee1 DS |
303 | config ARCH_PNX4008 |
304 | bool "Philips Nexperia PNX4008 Mobile" | |
305 | help | |
306 | This enables support for Philips PNX4008 mobile platform. | |
307 | ||
1da177e4 LT |
308 | config ARCH_PXA |
309 | bool "PXA2xx-based" | |
a4f7e763 | 310 | depends on MMU |
034d2f5a | 311 | select ARCH_MTD_XIP |
0a938b97 | 312 | select GENERIC_GPIO |
45cf5eef | 313 | select GENERIC_TIME |
f999b8bd MM |
314 | help |
315 | Support for Intel's PXA2XX processor line. | |
1da177e4 LT |
316 | |
317 | config ARCH_RPC | |
318 | bool "RiscPC" | |
319 | select ARCH_ACORN | |
320 | select FIQ | |
321 | select TIMER_ACORN | |
a08b6b79 | 322 | select ARCH_MAY_HAVE_PC_FDC |
065909b9 | 323 | select ISA_DMA_API |
5ea81769 | 324 | select NO_IOPORT |
1da177e4 LT |
325 | help |
326 | On the Acorn Risc-PC, Linux can support the internal IDE disk and | |
327 | CD-ROM interface, serial and parallel port, and the floppy drive. | |
328 | ||
329 | config ARCH_SA1100 | |
330 | bool "SA1100-based" | |
f7e68bbf | 331 | select ISA |
3cd9e19e | 332 | select ARCH_DISCONTIGMEM_ENABLE |
034d2f5a | 333 | select ARCH_MTD_XIP |
0a938b97 | 334 | select GENERIC_GPIO |
f999b8bd MM |
335 | help |
336 | Support for StrongARM 11x0 based boards. | |
1da177e4 LT |
337 | |
338 | config ARCH_S3C2410 | |
e4d06e39 | 339 | bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443" |
0a938b97 | 340 | select GENERIC_GPIO |
1da177e4 LT |
341 | help |
342 | Samsung S3C2410X CPU based systems, such as the Simtec Electronics | |
343 | BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or | |
f6c8965a | 344 | the Samsung SMDK2410 development board (and derivatives). |
1da177e4 LT |
345 | |
346 | config ARCH_SHARK | |
347 | bool "Shark" | |
f7e68bbf RK |
348 | select ISA |
349 | select ISA_DMA | |
350 | select PCI | |
f999b8bd MM |
351 | help |
352 | Support for the StrongARM based Digital DNARD machine, also known | |
353 | as "Shark" (<http://www.shark-linux.de/shark.html>). | |
1da177e4 LT |
354 | |
355 | config ARCH_LH7A40X | |
356 | bool "Sharp LH7A40X" | |
357 | help | |
358 | Say Y here for systems based on one of the Sharp LH7A40X | |
359 | System on a Chip processors. These CPUs include an ARM922T | |
360 | core with a wide array of integrated devices for | |
361 | hand-held and low-power applications. | |
362 | ||
363 | config ARCH_OMAP | |
364 | bool "TI OMAP" | |
0a938b97 | 365 | select GENERIC_GPIO |
f999b8bd MM |
366 | help |
367 | Support for TI's OMAP platform (OMAP1 and OMAP2). | |
1da177e4 | 368 | |
1da177e4 LT |
369 | endchoice |
370 | ||
371 | source "arch/arm/mach-clps711x/Kconfig" | |
372 | ||
e7736d47 LB |
373 | source "arch/arm/mach-ep93xx/Kconfig" |
374 | ||
1da177e4 LT |
375 | source "arch/arm/mach-footbridge/Kconfig" |
376 | ||
377 | source "arch/arm/mach-integrator/Kconfig" | |
378 | ||
3f7e5815 LB |
379 | source "arch/arm/mach-iop32x/Kconfig" |
380 | ||
381 | source "arch/arm/mach-iop33x/Kconfig" | |
1da177e4 | 382 | |
285f5fa7 DW |
383 | source "arch/arm/mach-iop13xx/Kconfig" |
384 | ||
1da177e4 LT |
385 | source "arch/arm/mach-ixp4xx/Kconfig" |
386 | ||
387 | source "arch/arm/mach-ixp2000/Kconfig" | |
388 | ||
c4713074 LB |
389 | source "arch/arm/mach-ixp23xx/Kconfig" |
390 | ||
1da177e4 LT |
391 | source "arch/arm/mach-pxa/Kconfig" |
392 | ||
393 | source "arch/arm/mach-sa1100/Kconfig" | |
394 | ||
d48af15e TL |
395 | source "arch/arm/plat-omap/Kconfig" |
396 | ||
397 | source "arch/arm/mach-omap1/Kconfig" | |
1da177e4 | 398 | |
1dbae815 TL |
399 | source "arch/arm/mach-omap2/Kconfig" |
400 | ||
a21765a7 BD |
401 | source "arch/arm/plat-s3c24xx/Kconfig" |
402 | ||
403 | if ARCH_S3C2410 | |
404 | source "arch/arm/mach-s3c2400/Kconfig" | |
1da177e4 | 405 | source "arch/arm/mach-s3c2410/Kconfig" |
a21765a7 BD |
406 | source "arch/arm/mach-s3c2412/Kconfig" |
407 | source "arch/arm/mach-s3c2440/Kconfig" | |
408 | source "arch/arm/mach-s3c2442/Kconfig" | |
e4d06e39 | 409 | source "arch/arm/mach-s3c2443/Kconfig" |
a21765a7 | 410 | endif |
1da177e4 LT |
411 | |
412 | source "arch/arm/mach-lh7a40x/Kconfig" | |
413 | ||
414 | source "arch/arm/mach-imx/Kconfig" | |
415 | ||
416 | source "arch/arm/mach-h720x/Kconfig" | |
417 | ||
418 | source "arch/arm/mach-versatile/Kconfig" | |
419 | ||
038c5b60 BN |
420 | source "arch/arm/mach-aaec2000/Kconfig" |
421 | ||
8ad68bbf CM |
422 | source "arch/arm/mach-realview/Kconfig" |
423 | ||
9d041268 | 424 | source "arch/arm/mach-at91/Kconfig" |
73a59c1c | 425 | |
bb6d8c88 SH |
426 | source "arch/arm/mach-netx/Kconfig" |
427 | ||
9918cda5 UKK |
428 | source "arch/arm/mach-ns9xxx/Kconfig" |
429 | ||
1da177e4 LT |
430 | # Definitions to make life easier |
431 | config ARCH_ACORN | |
432 | bool | |
433 | ||
7ae1f7ec LB |
434 | config PLAT_IOP |
435 | bool | |
436 | ||
1da177e4 LT |
437 | source arch/arm/mm/Kconfig |
438 | ||
afe4b25e LB |
439 | config IWMMXT |
440 | bool "Enable iWMMXt support" | |
6340aa61 | 441 | depends on CPU_XSCALE || CPU_XSC3 |
afe4b25e LB |
442 | default y if PXA27x |
443 | help | |
444 | Enable support for iWMMXt context switching at run time if | |
445 | running on a CPU that supports it. | |
446 | ||
1da177e4 LT |
447 | # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER |
448 | config XSCALE_PMU | |
449 | bool | |
450 | depends on CPU_XSCALE && !XSCALE_PMU_TIMER | |
451 | default y | |
452 | ||
3b93e7b0 HC |
453 | if !MMU |
454 | source "arch/arm/Kconfig-nommu" | |
455 | endif | |
456 | ||
1da177e4 LT |
457 | endmenu |
458 | ||
459 | source "arch/arm/common/Kconfig" | |
460 | ||
461 | config FORCE_MAX_ZONEORDER | |
462 | int | |
463 | depends on SA1111 | |
464 | default "9" | |
465 | ||
466 | menu "Bus support" | |
467 | ||
468 | config ARM_AMBA | |
469 | bool | |
470 | ||
471 | config ISA | |
472 | bool | |
1da177e4 LT |
473 | help |
474 | Find out whether you have ISA slots on your motherboard. ISA is the | |
475 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
476 | inside your box. Other bus systems are PCI, EISA, MicroChannel | |
477 | (MCA) or VESA. ISA is an older system, now being displaced by PCI; | |
478 | newer boards don't support it. If you have ISA, say Y, otherwise N. | |
479 | ||
065909b9 | 480 | # Select ISA DMA controller support |
1da177e4 LT |
481 | config ISA_DMA |
482 | bool | |
065909b9 | 483 | select ISA_DMA_API |
1da177e4 | 484 | |
065909b9 | 485 | # Select ISA DMA interface |
5cae841b AV |
486 | config ISA_DMA_API |
487 | bool | |
5cae841b | 488 | |
1da177e4 | 489 | config PCI |
68939121 | 490 | bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX |
1da177e4 LT |
491 | help |
492 | Find out whether you have a PCI motherboard. PCI is the name of a | |
493 | bus system, i.e. the way the CPU talks to the other stuff inside | |
494 | your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or | |
495 | VESA. If you have PCI, say Y, otherwise N. | |
496 | ||
497 | The PCI-HOWTO, available from | |
498 | <http://www.tldp.org/docs.html#howto>, contains valuable | |
499 | information about which PCI hardware does work under Linux and which | |
500 | doesn't. | |
501 | ||
502 | # Select the host bridge type | |
503 | config PCI_HOST_VIA82C505 | |
504 | bool | |
505 | depends on PCI && ARCH_SHARK | |
506 | default y | |
507 | ||
508 | source "drivers/pci/Kconfig" | |
509 | ||
510 | source "drivers/pcmcia/Kconfig" | |
511 | ||
512 | endmenu | |
513 | ||
514 | menu "Kernel Features" | |
515 | ||
516 | config SMP | |
517 | bool "Symmetric Multi-Processing (EXPERIMENTAL)" | |
f6db449c | 518 | depends on EXPERIMENTAL && REALVIEW_MPCORE |
1da177e4 LT |
519 | help |
520 | This enables support for systems with more than one CPU. If you have | |
521 | a system with only one CPU, like most personal computers, say N. If | |
522 | you have a system with more than one CPU, say Y. | |
523 | ||
524 | If you say N here, the kernel will run on single and multiprocessor | |
525 | machines, but will use only one CPU of a multiprocessor machine. If | |
526 | you say Y here, the kernel will run on many, but not all, single | |
527 | processor machines. On a single processor machine, the kernel will | |
528 | run faster if you say N here. | |
529 | ||
12c62c2e AO |
530 | See also the <file:Documentation/smp.txt>, |
531 | <file:Documentation/i386/IO-APIC.txt>, | |
1da177e4 LT |
532 | <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at |
533 | <http://www.linuxdoc.org/docs.html#howto>. | |
534 | ||
535 | If you don't know what to do here, say N. | |
536 | ||
537 | config NR_CPUS | |
538 | int "Maximum number of CPUs (2-32)" | |
539 | range 2 32 | |
540 | depends on SMP | |
541 | default "4" | |
542 | ||
a054a811 RK |
543 | config HOTPLUG_CPU |
544 | bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" | |
545 | depends on SMP && HOTPLUG && EXPERIMENTAL | |
546 | help | |
547 | Say Y here to experiment with turning CPUs off and on. CPUs | |
548 | can be controlled through /sys/devices/system/cpu. | |
549 | ||
37ee16ae RK |
550 | config LOCAL_TIMERS |
551 | bool "Use local timer interrupts" | |
2a98beb6 | 552 | depends on SMP && REALVIEW_MPCORE |
37ee16ae RK |
553 | default y |
554 | help | |
555 | Enable support for local timers on SMP platforms, rather then the | |
556 | legacy IPI broadcast method. Local timers allows the system | |
557 | accounting to be spread across the timer interval, preventing a | |
558 | "thundering herd" at every timer tick. | |
559 | ||
1da177e4 LT |
560 | config PREEMPT |
561 | bool "Preemptible Kernel (EXPERIMENTAL)" | |
562 | depends on EXPERIMENTAL | |
563 | help | |
564 | This option reduces the latency of the kernel when reacting to | |
565 | real-time or interactive events by allowing a low priority process to | |
566 | be preempted even if it is in kernel mode executing a system call. | |
567 | This allows applications to run more reliably even when the system is | |
568 | under load. | |
569 | ||
570 | Say Y here if you are building a kernel for a desktop, embedded | |
571 | or real-time system. Say N if you are unsure. | |
572 | ||
8749af68 RK |
573 | config NO_IDLE_HZ |
574 | bool "Dynamic tick timer" | |
575 | help | |
576 | Select this option if you want to disable continuous timer ticks | |
577 | and have them programmed to occur as required. This option saves | |
578 | power as the system can remain in idle state for longer. | |
579 | ||
580 | By default dynamic tick is disabled during the boot, and can be | |
581 | manually enabled with: | |
582 | ||
583 | echo 1 > /sys/devices/system/timer/timer0/dyn_tick | |
584 | ||
585 | Alternatively, if you want dynamic tick automatically enabled | |
586 | during boot, pass "dyntick=enable" via the kernel command string. | |
587 | ||
f2be64b3 TL |
588 | Please note that dynamic tick may affect the accuracy of |
589 | timekeeping on some platforms depending on the implementation. | |
569d2c34 NP |
590 | Currently at least OMAP, PXA2xx and SA11x0 platforms are known |
591 | to have accurate timekeeping with dynamic tick. | |
f2be64b3 | 592 | |
f8065813 RK |
593 | config HZ |
594 | int | |
595 | default 128 if ARCH_L7200 | |
596 | default 200 if ARCH_EBSA110 || ARCH_S3C2410 | |
bfe65704 | 597 | default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER |
f8065813 RK |
598 | default 100 |
599 | ||
704bdda0 NP |
600 | config AEABI |
601 | bool "Use the ARM EABI to compile the kernel" | |
602 | help | |
603 | This option allows for the kernel to be compiled using the latest | |
604 | ARM ABI (aka EABI). This is only useful if you are using a user | |
605 | space environment that is also compiled with EABI. | |
606 | ||
607 | Since there are major incompatibilities between the legacy ABI and | |
608 | EABI, especially with regard to structure member alignment, this | |
609 | option also changes the kernel syscall calling convention to | |
610 | disambiguate both ABIs and allow for backward compatibility support | |
611 | (selected with CONFIG_OABI_COMPAT). | |
612 | ||
613 | To use this you need GCC version 4.0.0 or later. | |
614 | ||
6c90c872 | 615 | config OABI_COMPAT |
a73a3ff1 | 616 | bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" |
61c484d4 | 617 | depends on AEABI && EXPERIMENTAL |
6c90c872 NP |
618 | default y |
619 | help | |
620 | This option preserves the old syscall interface along with the | |
621 | new (ARM EABI) one. It also provides a compatibility layer to | |
622 | intercept syscalls that have structure arguments which layout | |
623 | in memory differs between the legacy ABI and the new ARM EABI | |
624 | (only for non "thumb" binaries). This option adds a tiny | |
625 | overhead to all syscalls and produces a slightly larger kernel. | |
626 | If you know you'll be using only pure EABI user space then you | |
627 | can say N here. If this option is not selected and you attempt | |
628 | to execute a legacy ABI binary then the result will be | |
629 | UNPREDICTABLE (in fact it can be predicted that it won't work | |
630 | at all). If in doubt say Y. | |
631 | ||
3f22ab27 | 632 | config ARCH_DISCONTIGMEM_ENABLE |
1da177e4 | 633 | bool |
f7e68bbf | 634 | default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM) |
1da177e4 LT |
635 | help |
636 | Say Y to support efficient handling of discontiguous physical memory, | |
637 | for architectures which are either NUMA (Non-Uniform Memory Access) | |
638 | or have huge holes in the physical address space for other reasons. | |
639 | See <file:Documentation/vm/numa> for more. | |
640 | ||
c80d79d7 YG |
641 | config NODES_SHIFT |
642 | int | |
643 | default "4" if ARCH_LH7A40X | |
644 | default "2" | |
645 | depends on NEED_MULTIPLE_NODES | |
646 | ||
3f22ab27 DH |
647 | source "mm/Kconfig" |
648 | ||
1da177e4 LT |
649 | config LEDS |
650 | bool "Timer and CPU usage LEDs" | |
651 | depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \ | |
652 | ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \ | |
653 | ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ | |
654 | ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ | |
73a59c1c | 655 | ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \ |
58a0cd78 | 656 | ARCH_AT91 || MACH_TRIZEPS4 |
1da177e4 LT |
657 | help |
658 | If you say Y here, the LEDs on your machine will be used | |
659 | to provide useful information about your current system status. | |
660 | ||
661 | If you are compiling a kernel for a NetWinder or EBSA-285, you will | |
662 | be able to select which LEDs are active using the options below. If | |
663 | you are compiling a kernel for the EBSA-110 or the LART however, the | |
664 | red LED will simply flash regularly to indicate that the system is | |
665 | still functional. It is safe to say Y here if you have a CATS | |
666 | system, but the driver will do nothing. | |
667 | ||
668 | config LEDS_TIMER | |
669 | bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ | |
670 | MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 | |
671 | depends on LEDS | |
672 | default y if ARCH_EBSA110 | |
673 | help | |
674 | If you say Y here, one of the system LEDs (the green one on the | |
675 | NetWinder, the amber one on the EBSA285, or the red one on the LART) | |
676 | will flash regularly to indicate that the system is still | |
677 | operational. This is mainly useful to kernel hackers who are | |
678 | debugging unstable kernels. | |
679 | ||
680 | The LART uses the same LED for both Timer LED and CPU usage LED | |
681 | functions. You may choose to use both, but the Timer LED function | |
682 | will overrule the CPU usage LED. | |
683 | ||
684 | config LEDS_CPU | |
685 | bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ | |
686 | !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 | |
687 | depends on LEDS | |
688 | help | |
689 | If you say Y here, the red LED will be used to give a good real | |
690 | time indication of CPU usage, by lighting whenever the idle task | |
691 | is not currently executing. | |
692 | ||
693 | The LART uses the same LED for both Timer LED and CPU usage LED | |
694 | functions. You may choose to use both, but the Timer LED function | |
695 | will overrule the CPU usage LED. | |
696 | ||
697 | config ALIGNMENT_TRAP | |
698 | bool | |
f12d0d7c | 699 | depends on CPU_CP15_MMU |
1da177e4 LT |
700 | default y if !ARCH_EBSA110 |
701 | help | |
84eb8d06 | 702 | ARM processors cannot fetch/store information which is not |
1da177e4 LT |
703 | naturally aligned on the bus, i.e., a 4 byte fetch must start at an |
704 | address divisible by 4. On 32-bit ARM processors, these non-aligned | |
705 | fetch/store instructions will be emulated in software if you say | |
706 | here, which has a severe performance impact. This is necessary for | |
707 | correct operation of some network protocols. With an IP-only | |
708 | configuration it is safe to say N, otherwise say Y. | |
709 | ||
710 | endmenu | |
711 | ||
712 | menu "Boot options" | |
713 | ||
714 | # Compressed boot loader in ROM. Yes, we really want to ask about | |
715 | # TEXT and BSS so we preserve their values in the config files. | |
716 | config ZBOOT_ROM_TEXT | |
717 | hex "Compressed ROM boot loader base address" | |
718 | default "0" | |
719 | help | |
720 | The physical address at which the ROM-able zImage is to be | |
721 | placed in the target. Platforms which normally make use of | |
722 | ROM-able zImage formats normally set this to a suitable | |
723 | value in their defconfig file. | |
724 | ||
725 | If ZBOOT_ROM is not enabled, this has no effect. | |
726 | ||
727 | config ZBOOT_ROM_BSS | |
728 | hex "Compressed ROM boot loader BSS address" | |
729 | default "0" | |
730 | help | |
f8c440b2 DF |
731 | The base address of an area of read/write memory in the target |
732 | for the ROM-able zImage which must be available while the | |
733 | decompressor is running. It must be large enough to hold the | |
734 | entire decompressed kernel plus an additional 128 KiB. | |
735 | Platforms which normally make use of ROM-able zImage formats | |
736 | normally set this to a suitable value in their defconfig file. | |
1da177e4 LT |
737 | |
738 | If ZBOOT_ROM is not enabled, this has no effect. | |
739 | ||
740 | config ZBOOT_ROM | |
741 | bool "Compressed boot loader in ROM/flash" | |
742 | depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS | |
743 | help | |
744 | Say Y here if you intend to execute your compressed kernel image | |
745 | (zImage) directly from ROM or flash. If unsure, say N. | |
746 | ||
747 | config CMDLINE | |
748 | string "Default kernel command string" | |
749 | default "" | |
750 | help | |
751 | On some architectures (EBSA110 and CATS), there is currently no way | |
752 | for the boot loader to pass arguments to the kernel. For these | |
753 | architectures, you should supply some command-line options at build | |
754 | time by entering them here. As a minimum, you should specify the | |
755 | memory size and the root device (e.g., mem=64M root=/dev/nfs). | |
756 | ||
757 | config XIP_KERNEL | |
758 | bool "Kernel Execute-In-Place from ROM" | |
759 | depends on !ZBOOT_ROM | |
760 | help | |
761 | Execute-In-Place allows the kernel to run from non-volatile storage | |
762 | directly addressable by the CPU, such as NOR flash. This saves RAM | |
763 | space since the text section of the kernel is not loaded from flash | |
764 | to RAM. Read-write sections, such as the data section and stack, | |
765 | are still copied to RAM. The XIP kernel is not compressed since | |
766 | it has to run directly from flash, so it will take more space to | |
767 | store it. The flash address used to link the kernel object files, | |
768 | and for storing it, is configuration dependent. Therefore, if you | |
769 | say Y here, you must know the proper physical address where to | |
770 | store the kernel image depending on your own flash memory usage. | |
771 | ||
772 | Also note that the make target becomes "make xipImage" rather than | |
773 | "make zImage" or "make Image". The final kernel binary to put in | |
774 | ROM memory will be arch/arm/boot/xipImage. | |
775 | ||
776 | If unsure, say N. | |
777 | ||
778 | config XIP_PHYS_ADDR | |
779 | hex "XIP Kernel Physical Location" | |
780 | depends on XIP_KERNEL | |
781 | default "0x00080000" | |
782 | help | |
783 | This is the physical address in your flash memory the kernel will | |
784 | be linked for and stored to. This address is dependent on your | |
785 | own flash usage. | |
786 | ||
c587e4a6 RP |
787 | config KEXEC |
788 | bool "Kexec system call (EXPERIMENTAL)" | |
789 | depends on EXPERIMENTAL | |
790 | help | |
791 | kexec is a system call that implements the ability to shutdown your | |
792 | current kernel, and to start another kernel. It is like a reboot | |
793 | but it is indepedent of the system firmware. And like a reboot | |
794 | you can start any kernel with it, not just Linux. | |
795 | ||
796 | It is an ongoing process to be certain the hardware in a machine | |
797 | is properly shutdown, so do not be surprised if this code does not | |
798 | initially work for you. It may help to enable device hotplugging | |
799 | support. | |
800 | ||
1da177e4 LT |
801 | endmenu |
802 | ||
3c8cd0cc | 803 | if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX ) |
1da177e4 LT |
804 | |
805 | menu "CPU Frequency scaling" | |
806 | ||
807 | source "drivers/cpufreq/Kconfig" | |
808 | ||
809 | config CPU_FREQ_SA1100 | |
810 | bool | |
07c6d48f | 811 | depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT) |
1da177e4 LT |
812 | default y |
813 | ||
814 | config CPU_FREQ_SA1110 | |
815 | bool | |
816 | depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3) | |
817 | default y | |
818 | ||
819 | config CPU_FREQ_INTEGRATOR | |
820 | tristate "CPUfreq driver for ARM Integrator CPUs" | |
821 | depends on ARCH_INTEGRATOR && CPU_FREQ | |
822 | default y | |
823 | help | |
824 | This enables the CPUfreq driver for ARM Integrator CPUs. | |
825 | ||
826 | For details, take a look at <file:Documentation/cpu-freq>. | |
827 | ||
828 | If in doubt, say Y. | |
829 | ||
3c8cd0cc PP |
830 | config CPU_FREQ_IMX |
831 | tristate "CPUfreq driver for i.MX CPUs" | |
832 | depends on ARCH_IMX && CPU_FREQ | |
833 | default n | |
834 | help | |
835 | This enables the CPUfreq driver for i.MX CPUs. | |
836 | ||
837 | If in doubt, say N. | |
838 | ||
1da177e4 LT |
839 | endmenu |
840 | ||
841 | endif | |
842 | ||
843 | menu "Floating point emulation" | |
844 | ||
845 | comment "At least one emulation must be selected" | |
846 | ||
847 | config FPE_NWFPE | |
848 | bool "NWFPE math emulation" | |
8993a44c | 849 | depends on !AEABI || OABI_COMPAT |
1da177e4 LT |
850 | ---help--- |
851 | Say Y to include the NWFPE floating point emulator in the kernel. | |
852 | This is necessary to run most binaries. Linux does not currently | |
853 | support floating point hardware so you need to say Y here even if | |
854 | your machine has an FPA or floating point co-processor podule. | |
855 | ||
856 | You may say N here if you are going to load the Acorn FPEmulator | |
857 | early in the bootup. | |
858 | ||
859 | config FPE_NWFPE_XP | |
860 | bool "Support extended precision" | |
bedf142b | 861 | depends on FPE_NWFPE |
1da177e4 LT |
862 | help |
863 | Say Y to include 80-bit support in the kernel floating-point | |
864 | emulator. Otherwise, only 32 and 64-bit support is compiled in. | |
865 | Note that gcc does not generate 80-bit operations by default, | |
866 | so in most cases this option only enlarges the size of the | |
867 | floating point emulator without any good reason. | |
868 | ||
869 | You almost surely want to say N here. | |
870 | ||
871 | config FPE_FASTFPE | |
872 | bool "FastFPE math emulation (EXPERIMENTAL)" | |
8993a44c | 873 | depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL |
1da177e4 LT |
874 | ---help--- |
875 | Say Y here to include the FAST floating point emulator in the kernel. | |
876 | This is an experimental much faster emulator which now also has full | |
877 | precision for the mantissa. It does not support any exceptions. | |
878 | It is very simple, and approximately 3-6 times faster than NWFPE. | |
879 | ||
880 | It should be sufficient for most programs. It may be not suitable | |
881 | for scientific calculations, but you have to check this for yourself. | |
882 | If you do not feel you need a faster FP emulation you should better | |
883 | choose NWFPE. | |
884 | ||
885 | config VFP | |
886 | bool "VFP-format floating point maths" | |
887 | depends on CPU_V6 || CPU_ARM926T | |
888 | help | |
889 | Say Y to include VFP support code in the kernel. This is needed | |
890 | if your hardware includes a VFP unit. | |
891 | ||
892 | Please see <file:Documentation/arm/VFP/release-notes.txt> for | |
893 | release notes and additional status information. | |
894 | ||
895 | Say N if your target does not have VFP hardware. | |
896 | ||
897 | endmenu | |
898 | ||
899 | menu "Userspace binary formats" | |
900 | ||
901 | source "fs/Kconfig.binfmt" | |
902 | ||
903 | config ARTHUR | |
904 | tristate "RISC OS personality" | |
704bdda0 | 905 | depends on !AEABI |
1da177e4 LT |
906 | help |
907 | Say Y here to include the kernel code necessary if you want to run | |
908 | Acorn RISC OS/Arthur binaries under Linux. This code is still very | |
909 | experimental; if this sounds frightening, say N and sleep in peace. | |
910 | You can also say M here to compile this support as a module (which | |
911 | will be called arthur). | |
912 | ||
913 | endmenu | |
914 | ||
915 | menu "Power management options" | |
916 | ||
eceab4ac | 917 | source "kernel/power/Kconfig" |
1da177e4 | 918 | |
1da177e4 LT |
919 | endmenu |
920 | ||
d5950b43 SR |
921 | source "net/Kconfig" |
922 | ||
1da177e4 LT |
923 | menu "Device Drivers" |
924 | ||
925 | source "drivers/base/Kconfig" | |
926 | ||
c35bf4a5 PM |
927 | source "drivers/connector/Kconfig" |
928 | ||
f12d0d7c | 929 | if ALIGNMENT_TRAP || !CPU_CP15_MMU |
1da177e4 LT |
930 | source "drivers/mtd/Kconfig" |
931 | endif | |
932 | ||
933 | source "drivers/parport/Kconfig" | |
934 | ||
935 | source "drivers/pnp/Kconfig" | |
936 | ||
937 | source "drivers/block/Kconfig" | |
938 | ||
939 | source "drivers/acorn/block/Kconfig" | |
940 | ||
3f7e5815 | 941 | if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \ |
bb011b8e | 942 | || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \ |
c4713074 LB |
943 | || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \ |
944 | || ARCH_IXP23XX | |
1da177e4 LT |
945 | source "drivers/ide/Kconfig" |
946 | endif | |
947 | ||
948 | source "drivers/scsi/Kconfig" | |
949 | ||
eb370f0b MM |
950 | source "drivers/ata/Kconfig" |
951 | ||
1da177e4 LT |
952 | source "drivers/md/Kconfig" |
953 | ||
954 | source "drivers/message/fusion/Kconfig" | |
955 | ||
956 | source "drivers/ieee1394/Kconfig" | |
957 | ||
958 | source "drivers/message/i2o/Kconfig" | |
959 | ||
d5950b43 | 960 | source "drivers/net/Kconfig" |
1da177e4 LT |
961 | |
962 | source "drivers/isdn/Kconfig" | |
963 | ||
964 | # input before char - char/joystick depends on it. As does USB. | |
965 | ||
966 | source "drivers/input/Kconfig" | |
967 | ||
968 | source "drivers/char/Kconfig" | |
969 | ||
970 | source "drivers/i2c/Kconfig" | |
971 | ||
8ae12a0d DB |
972 | source "drivers/spi/Kconfig" |
973 | ||
04916c0e AZ |
974 | source "drivers/w1/Kconfig" |
975 | ||
ad2f931d JD |
976 | source "drivers/hwmon/Kconfig" |
977 | ||
1da177e4 LT |
978 | #source "drivers/l3/Kconfig" |
979 | ||
980 | source "drivers/misc/Kconfig" | |
981 | ||
a4e137ab RK |
982 | source "drivers/mfd/Kconfig" |
983 | ||
c72a1d60 RP |
984 | source "drivers/leds/Kconfig" |
985 | ||
1da177e4 LT |
986 | source "drivers/media/Kconfig" |
987 | ||
988 | source "drivers/video/Kconfig" | |
989 | ||
990 | source "sound/Kconfig" | |
991 | ||
c2dade51 SH |
992 | source "drivers/hid/Kconfig" |
993 | ||
1da177e4 LT |
994 | source "drivers/usb/Kconfig" |
995 | ||
996 | source "drivers/mmc/Kconfig" | |
997 | ||
12b824fb AZ |
998 | source "drivers/rtc/Kconfig" |
999 | ||
1da177e4 LT |
1000 | endmenu |
1001 | ||
1002 | source "fs/Kconfig" | |
1003 | ||
1004 | source "arch/arm/oprofile/Kconfig" | |
1005 | ||
1006 | source "arch/arm/Kconfig.debug" | |
1007 | ||
1008 | source "security/Kconfig" | |
1009 | ||
1010 | source "crypto/Kconfig" | |
1011 | ||
1012 | source "lib/Kconfig" |