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