Commit | Line | Data |
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1da177e4 LT |
1 | # |
2 | # For a description of the syntax of this configuration file, | |
3 | # see Documentation/kbuild/kconfig-language.txt. | |
4 | # | |
5 | ||
6 | mainmenu "Linux Kernel Configuration" | |
7 | ||
8 | config ARM | |
9 | bool | |
10 | default y | |
11 | help | |
12 | The ARM series is a line of low-power-consumption RISC chip designs | |
f6c8965a | 13 | licensed by ARM Ltd and targeted at embedded applications and |
1da177e4 | 14 | handhelds such as the Compaq IPAQ. ARM-based PCs are no longer |
f6c8965a | 15 | manufactured, but legacy ARM-based PC hardware remains popular in |
1da177e4 LT |
16 | Europe. There is an ARM Linux project with a web page at |
17 | <http://www.arm.linux.org.uk/>. | |
18 | ||
19 | config MMU | |
20 | bool | |
21 | default y | |
22 | ||
23 | config EISA | |
24 | bool | |
25 | ---help--- | |
26 | The Extended Industry Standard Architecture (EISA) bus was | |
27 | developed as an open alternative to the IBM MicroChannel bus. | |
28 | ||
29 | The EISA bus provided some of the features of the IBM MicroChannel | |
30 | bus while maintaining backward compatibility with cards made for | |
31 | the older ISA bus. The EISA bus saw limited use between 1988 and | |
32 | 1995 when it was made obsolete by the PCI bus. | |
33 | ||
34 | Say Y here if you are building a kernel for an EISA-based machine. | |
35 | ||
36 | Otherwise, say N. | |
37 | ||
38 | config SBUS | |
39 | bool | |
40 | ||
41 | config MCA | |
42 | bool | |
43 | help | |
44 | MicroChannel Architecture is found in some IBM PS/2 machines and | |
45 | laptops. It is a bus system similar to PCI or ISA. See | |
46 | <file:Documentation/mca.txt> (and especially the web page given | |
47 | there) before attempting to build an MCA bus kernel. | |
48 | ||
1da177e4 LT |
49 | config RWSEM_GENERIC_SPINLOCK |
50 | bool | |
51 | default y | |
52 | ||
53 | config RWSEM_XCHGADD_ALGORITHM | |
54 | bool | |
55 | ||
56 | config GENERIC_CALIBRATE_DELAY | |
57 | bool | |
58 | default y | |
59 | ||
60 | config GENERIC_BUST_SPINLOCK | |
61 | bool | |
62 | ||
a08b6b79 Z |
63 | config ARCH_MAY_HAVE_PC_FDC |
64 | bool | |
65 | ||
1da177e4 LT |
66 | config GENERIC_ISA_DMA |
67 | bool | |
68 | ||
1da177e4 LT |
69 | config FIQ |
70 | bool | |
71 | ||
034d2f5a AV |
72 | config ARCH_MTD_XIP |
73 | bool | |
74 | ||
1da177e4 LT |
75 | source "init/Kconfig" |
76 | ||
77 | menu "System Type" | |
78 | ||
79 | choice | |
80 | prompt "ARM system type" | |
6a0e2430 | 81 | default ARCH_VERSATILE |
1da177e4 LT |
82 | |
83 | config ARCH_CLPS7500 | |
84 | bool "Cirrus-CL-PS7500FE" | |
85 | select TIMER_ACORN | |
f7e68bbf | 86 | select ISA |
f999b8bd MM |
87 | help |
88 | Support for the Cirrus Logic PS7500FE system-on-a-chip. | |
1da177e4 LT |
89 | |
90 | config ARCH_CLPS711X | |
91 | bool "CLPS711x/EP721x-based" | |
f999b8bd MM |
92 | help |
93 | Support for Cirrus Logic 711x/721x based boards. | |
1da177e4 LT |
94 | |
95 | config ARCH_CO285 | |
96 | bool "Co-EBSA285" | |
97 | select FOOTBRIDGE | |
98 | select FOOTBRIDGE_ADDIN | |
f999b8bd MM |
99 | help |
100 | Support for Intel's EBSA285 companion chip. | |
1da177e4 LT |
101 | |
102 | config ARCH_EBSA110 | |
103 | bool "EBSA-110" | |
f7e68bbf | 104 | select ISA |
1da177e4 LT |
105 | help |
106 | This is an evaluation board for the StrongARM processor available | |
f6c8965a | 107 | from Digital. It has limited hardware on-board, including an |
1da177e4 LT |
108 | Ethernet interface, two PCMCIA sockets, two serial ports and a |
109 | parallel port. | |
110 | ||
e7736d47 LB |
111 | config ARCH_EP93XX |
112 | bool "EP93xx-based" | |
113 | select ARM_AMBA | |
114 | select ARM_VIC | |
115 | help | |
116 | This enables support for the Cirrus EP93xx series of CPUs. | |
117 | ||
1da177e4 LT |
118 | config ARCH_FOOTBRIDGE |
119 | bool "FootBridge" | |
120 | select FOOTBRIDGE | |
f999b8bd MM |
121 | help |
122 | Support for systems based on the DC21285 companion chip | |
123 | ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. | |
1da177e4 LT |
124 | |
125 | config ARCH_INTEGRATOR | |
126 | bool "Integrator" | |
127 | select ARM_AMBA | |
128 | select ICST525 | |
f999b8bd MM |
129 | help |
130 | Support for ARM's Integrator platform. | |
1da177e4 LT |
131 | |
132 | config ARCH_IOP3XX | |
133 | bool "IOP3xx-based" | |
f7e68bbf | 134 | select PCI |
f999b8bd MM |
135 | help |
136 | Support for Intel's IOP3XX (XScale) family of processors. | |
1da177e4 LT |
137 | |
138 | config ARCH_IXP4XX | |
139 | bool "IXP4xx-based" | |
140 | select DMABOUNCE | |
f7e68bbf | 141 | select PCI |
f999b8bd MM |
142 | help |
143 | Support for Intel's IXP4XX (XScale) family of processors. | |
1da177e4 LT |
144 | |
145 | config ARCH_IXP2000 | |
146 | bool "IXP2400/2800-based" | |
f7e68bbf | 147 | select PCI |
f999b8bd MM |
148 | help |
149 | Support for Intel's IXP2400/2800 (XScale) family of processors. | |
1da177e4 LT |
150 | |
151 | config ARCH_L7200 | |
152 | bool "LinkUp-L7200" | |
153 | select FIQ | |
154 | help | |
155 | Say Y here if you intend to run this kernel on a LinkUp Systems | |
156 | L7200 Software Development Board which uses an ARM720T processor. | |
157 | Information on this board can be obtained at: | |
158 | ||
159 | <http://www.linkupsys.com/> | |
160 | ||
161 | If you have any questions or comments about the Linux kernel port | |
162 | to this board, send e-mail to <sjhill@cotw.com>. | |
163 | ||
164 | config ARCH_PXA | |
165 | bool "PXA2xx-based" | |
034d2f5a | 166 | select ARCH_MTD_XIP |
f999b8bd MM |
167 | help |
168 | Support for Intel's PXA2XX processor line. | |
1da177e4 LT |
169 | |
170 | config ARCH_RPC | |
171 | bool "RiscPC" | |
172 | select ARCH_ACORN | |
173 | select FIQ | |
174 | select TIMER_ACORN | |
a08b6b79 | 175 | select ARCH_MAY_HAVE_PC_FDC |
065909b9 | 176 | select ISA_DMA_API |
1da177e4 LT |
177 | help |
178 | On the Acorn Risc-PC, Linux can support the internal IDE disk and | |
179 | CD-ROM interface, serial and parallel port, and the floppy drive. | |
180 | ||
181 | config ARCH_SA1100 | |
182 | bool "SA1100-based" | |
f7e68bbf | 183 | select ISA |
3cd9e19e | 184 | select ARCH_DISCONTIGMEM_ENABLE |
034d2f5a | 185 | select ARCH_MTD_XIP |
f999b8bd MM |
186 | help |
187 | Support for StrongARM 11x0 based boards. | |
1da177e4 LT |
188 | |
189 | config ARCH_S3C2410 | |
190 | bool "Samsung S3C2410" | |
191 | help | |
192 | Samsung S3C2410X CPU based systems, such as the Simtec Electronics | |
193 | BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or | |
f6c8965a | 194 | the Samsung SMDK2410 development board (and derivatives). |
1da177e4 LT |
195 | |
196 | config ARCH_SHARK | |
197 | bool "Shark" | |
f7e68bbf RK |
198 | select ISA |
199 | select ISA_DMA | |
200 | select PCI | |
f999b8bd MM |
201 | help |
202 | Support for the StrongARM based Digital DNARD machine, also known | |
203 | as "Shark" (<http://www.shark-linux.de/shark.html>). | |
1da177e4 LT |
204 | |
205 | config ARCH_LH7A40X | |
206 | bool "Sharp LH7A40X" | |
207 | help | |
208 | Say Y here for systems based on one of the Sharp LH7A40X | |
209 | System on a Chip processors. These CPUs include an ARM922T | |
210 | core with a wide array of integrated devices for | |
211 | hand-held and low-power applications. | |
212 | ||
213 | config ARCH_OMAP | |
214 | bool "TI OMAP" | |
f999b8bd MM |
215 | help |
216 | Support for TI's OMAP platform (OMAP1 and OMAP2). | |
1da177e4 LT |
217 | |
218 | config ARCH_VERSATILE | |
219 | bool "Versatile" | |
220 | select ARM_AMBA | |
fa0fe48f | 221 | select ARM_VIC |
1da177e4 LT |
222 | select ICST307 |
223 | help | |
224 | This enables support for ARM Ltd Versatile board. | |
225 | ||
8ad68bbf CM |
226 | config ARCH_REALVIEW |
227 | bool "RealView" | |
228 | select ARM_AMBA | |
229 | select ICST307 | |
230 | help | |
231 | This enables support for ARM Ltd RealView boards. | |
232 | ||
1da177e4 LT |
233 | config ARCH_IMX |
234 | bool "IMX" | |
f999b8bd MM |
235 | help |
236 | Support for Motorola's i.MX family of processors (MX1, MXL). | |
1da177e4 LT |
237 | |
238 | config ARCH_H720X | |
239 | bool "Hynix-HMS720x-based" | |
065909b9 | 240 | select ISA_DMA_API |
1da177e4 LT |
241 | help |
242 | This enables support for systems based on the Hynix HMS720x | |
243 | ||
038c5b60 BN |
244 | config ARCH_AAEC2000 |
245 | bool "Agilent AAEC-2000 based" | |
049eb329 | 246 | select ARM_AMBA |
038c5b60 BN |
247 | help |
248 | This enables support for systems based on the Agilent AAEC-2000 | |
249 | ||
73a59c1c SP |
250 | config ARCH_AT91RM9200 |
251 | bool "AT91RM9200" | |
252 | help | |
f999b8bd MM |
253 | Say Y here if you intend to run this kernel on an Atmel |
254 | AT91RM9200-based board. | |
73a59c1c | 255 | |
1da177e4 LT |
256 | endchoice |
257 | ||
258 | source "arch/arm/mach-clps711x/Kconfig" | |
259 | ||
e7736d47 LB |
260 | source "arch/arm/mach-ep93xx/Kconfig" |
261 | ||
1da177e4 LT |
262 | source "arch/arm/mach-footbridge/Kconfig" |
263 | ||
264 | source "arch/arm/mach-integrator/Kconfig" | |
265 | ||
266 | source "arch/arm/mach-iop3xx/Kconfig" | |
267 | ||
268 | source "arch/arm/mach-ixp4xx/Kconfig" | |
269 | ||
270 | source "arch/arm/mach-ixp2000/Kconfig" | |
271 | ||
272 | source "arch/arm/mach-pxa/Kconfig" | |
273 | ||
274 | source "arch/arm/mach-sa1100/Kconfig" | |
275 | ||
d48af15e TL |
276 | source "arch/arm/plat-omap/Kconfig" |
277 | ||
278 | source "arch/arm/mach-omap1/Kconfig" | |
1da177e4 | 279 | |
1dbae815 TL |
280 | source "arch/arm/mach-omap2/Kconfig" |
281 | ||
1da177e4 LT |
282 | source "arch/arm/mach-s3c2410/Kconfig" |
283 | ||
284 | source "arch/arm/mach-lh7a40x/Kconfig" | |
285 | ||
286 | source "arch/arm/mach-imx/Kconfig" | |
287 | ||
288 | source "arch/arm/mach-h720x/Kconfig" | |
289 | ||
290 | source "arch/arm/mach-versatile/Kconfig" | |
291 | ||
038c5b60 BN |
292 | source "arch/arm/mach-aaec2000/Kconfig" |
293 | ||
8ad68bbf CM |
294 | source "arch/arm/mach-realview/Kconfig" |
295 | ||
73a59c1c SP |
296 | source "arch/arm/mach-at91rm9200/Kconfig" |
297 | ||
1da177e4 LT |
298 | # Definitions to make life easier |
299 | config ARCH_ACORN | |
300 | bool | |
301 | ||
302 | source arch/arm/mm/Kconfig | |
303 | ||
304 | # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER | |
305 | config XSCALE_PMU | |
306 | bool | |
307 | depends on CPU_XSCALE && !XSCALE_PMU_TIMER | |
308 | default y | |
309 | ||
310 | endmenu | |
311 | ||
312 | source "arch/arm/common/Kconfig" | |
313 | ||
314 | config FORCE_MAX_ZONEORDER | |
315 | int | |
316 | depends on SA1111 | |
317 | default "9" | |
318 | ||
319 | menu "Bus support" | |
320 | ||
321 | config ARM_AMBA | |
322 | bool | |
323 | ||
324 | config ISA | |
325 | bool | |
1da177e4 LT |
326 | help |
327 | Find out whether you have ISA slots on your motherboard. ISA is the | |
328 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
329 | inside your box. Other bus systems are PCI, EISA, MicroChannel | |
330 | (MCA) or VESA. ISA is an older system, now being displaced by PCI; | |
331 | newer boards don't support it. If you have ISA, say Y, otherwise N. | |
332 | ||
065909b9 | 333 | # Select ISA DMA controller support |
1da177e4 LT |
334 | config ISA_DMA |
335 | bool | |
065909b9 | 336 | select ISA_DMA_API |
1da177e4 | 337 | |
065909b9 | 338 | # Select ISA DMA interface |
5cae841b AV |
339 | config ISA_DMA_API |
340 | bool | |
5cae841b | 341 | |
1da177e4 | 342 | config PCI |
c0da085a | 343 | bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB |
1da177e4 LT |
344 | help |
345 | Find out whether you have a PCI motherboard. PCI is the name of a | |
346 | bus system, i.e. the way the CPU talks to the other stuff inside | |
347 | your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or | |
348 | VESA. If you have PCI, say Y, otherwise N. | |
349 | ||
350 | The PCI-HOWTO, available from | |
351 | <http://www.tldp.org/docs.html#howto>, contains valuable | |
352 | information about which PCI hardware does work under Linux and which | |
353 | doesn't. | |
354 | ||
355 | # Select the host bridge type | |
356 | config PCI_HOST_VIA82C505 | |
357 | bool | |
358 | depends on PCI && ARCH_SHARK | |
359 | default y | |
360 | ||
361 | source "drivers/pci/Kconfig" | |
362 | ||
363 | source "drivers/pcmcia/Kconfig" | |
364 | ||
365 | endmenu | |
366 | ||
367 | menu "Kernel Features" | |
368 | ||
369 | config SMP | |
370 | bool "Symmetric Multi-Processing (EXPERIMENTAL)" | |
f6db449c | 371 | depends on EXPERIMENTAL && REALVIEW_MPCORE |
1da177e4 LT |
372 | help |
373 | This enables support for systems with more than one CPU. If you have | |
374 | a system with only one CPU, like most personal computers, say N. If | |
375 | you have a system with more than one CPU, say Y. | |
376 | ||
377 | If you say N here, the kernel will run on single and multiprocessor | |
378 | machines, but will use only one CPU of a multiprocessor machine. If | |
379 | you say Y here, the kernel will run on many, but not all, single | |
380 | processor machines. On a single processor machine, the kernel will | |
381 | run faster if you say N here. | |
382 | ||
12c62c2e AO |
383 | See also the <file:Documentation/smp.txt>, |
384 | <file:Documentation/i386/IO-APIC.txt>, | |
1da177e4 LT |
385 | <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at |
386 | <http://www.linuxdoc.org/docs.html#howto>. | |
387 | ||
388 | If you don't know what to do here, say N. | |
389 | ||
390 | config NR_CPUS | |
391 | int "Maximum number of CPUs (2-32)" | |
392 | range 2 32 | |
393 | depends on SMP | |
394 | default "4" | |
395 | ||
a054a811 RK |
396 | config HOTPLUG_CPU |
397 | bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" | |
398 | depends on SMP && HOTPLUG && EXPERIMENTAL | |
399 | help | |
400 | Say Y here to experiment with turning CPUs off and on. CPUs | |
401 | can be controlled through /sys/devices/system/cpu. | |
402 | ||
37ee16ae RK |
403 | config LOCAL_TIMERS |
404 | bool "Use local timer interrupts" | |
2a98beb6 | 405 | depends on SMP && REALVIEW_MPCORE |
37ee16ae RK |
406 | default y |
407 | help | |
408 | Enable support for local timers on SMP platforms, rather then the | |
409 | legacy IPI broadcast method. Local timers allows the system | |
410 | accounting to be spread across the timer interval, preventing a | |
411 | "thundering herd" at every timer tick. | |
412 | ||
1da177e4 LT |
413 | config PREEMPT |
414 | bool "Preemptible Kernel (EXPERIMENTAL)" | |
415 | depends on EXPERIMENTAL | |
416 | help | |
417 | This option reduces the latency of the kernel when reacting to | |
418 | real-time or interactive events by allowing a low priority process to | |
419 | be preempted even if it is in kernel mode executing a system call. | |
420 | This allows applications to run more reliably even when the system is | |
421 | under load. | |
422 | ||
423 | Say Y here if you are building a kernel for a desktop, embedded | |
424 | or real-time system. Say N if you are unsure. | |
425 | ||
8749af68 RK |
426 | config NO_IDLE_HZ |
427 | bool "Dynamic tick timer" | |
428 | help | |
429 | Select this option if you want to disable continuous timer ticks | |
430 | and have them programmed to occur as required. This option saves | |
431 | power as the system can remain in idle state for longer. | |
432 | ||
433 | By default dynamic tick is disabled during the boot, and can be | |
434 | manually enabled with: | |
435 | ||
436 | echo 1 > /sys/devices/system/timer/timer0/dyn_tick | |
437 | ||
438 | Alternatively, if you want dynamic tick automatically enabled | |
439 | during boot, pass "dyntick=enable" via the kernel command string. | |
440 | ||
f2be64b3 TL |
441 | Please note that dynamic tick may affect the accuracy of |
442 | timekeeping on some platforms depending on the implementation. | |
569d2c34 NP |
443 | Currently at least OMAP, PXA2xx and SA11x0 platforms are known |
444 | to have accurate timekeeping with dynamic tick. | |
f2be64b3 | 445 | |
f8065813 RK |
446 | config HZ |
447 | int | |
448 | default 128 if ARCH_L7200 | |
449 | default 200 if ARCH_EBSA110 || ARCH_S3C2410 | |
bfe65704 | 450 | default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER |
f8065813 RK |
451 | default 100 |
452 | ||
704bdda0 NP |
453 | config AEABI |
454 | bool "Use the ARM EABI to compile the kernel" | |
455 | help | |
456 | This option allows for the kernel to be compiled using the latest | |
457 | ARM ABI (aka EABI). This is only useful if you are using a user | |
458 | space environment that is also compiled with EABI. | |
459 | ||
460 | Since there are major incompatibilities between the legacy ABI and | |
461 | EABI, especially with regard to structure member alignment, this | |
462 | option also changes the kernel syscall calling convention to | |
463 | disambiguate both ABIs and allow for backward compatibility support | |
464 | (selected with CONFIG_OABI_COMPAT). | |
465 | ||
466 | To use this you need GCC version 4.0.0 or later. | |
467 | ||
6c90c872 | 468 | config OABI_COMPAT |
a73a3ff1 | 469 | bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" |
61c484d4 | 470 | depends on AEABI && EXPERIMENTAL |
6c90c872 NP |
471 | default y |
472 | help | |
473 | This option preserves the old syscall interface along with the | |
474 | new (ARM EABI) one. It also provides a compatibility layer to | |
475 | intercept syscalls that have structure arguments which layout | |
476 | in memory differs between the legacy ABI and the new ARM EABI | |
477 | (only for non "thumb" binaries). This option adds a tiny | |
478 | overhead to all syscalls and produces a slightly larger kernel. | |
479 | If you know you'll be using only pure EABI user space then you | |
480 | can say N here. If this option is not selected and you attempt | |
481 | to execute a legacy ABI binary then the result will be | |
482 | UNPREDICTABLE (in fact it can be predicted that it won't work | |
483 | at all). If in doubt say Y. | |
484 | ||
3f22ab27 | 485 | config ARCH_DISCONTIGMEM_ENABLE |
1da177e4 | 486 | bool |
f7e68bbf | 487 | default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM) |
1da177e4 LT |
488 | help |
489 | Say Y to support efficient handling of discontiguous physical memory, | |
490 | for architectures which are either NUMA (Non-Uniform Memory Access) | |
491 | or have huge holes in the physical address space for other reasons. | |
492 | See <file:Documentation/vm/numa> for more. | |
493 | ||
3f22ab27 DH |
494 | source "mm/Kconfig" |
495 | ||
1da177e4 LT |
496 | config LEDS |
497 | bool "Timer and CPU usage LEDs" | |
498 | depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \ | |
499 | ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \ | |
500 | ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ | |
501 | ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ | |
73a59c1c SP |
502 | ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \ |
503 | ARCH_AT91RM9200 | |
1da177e4 LT |
504 | help |
505 | If you say Y here, the LEDs on your machine will be used | |
506 | to provide useful information about your current system status. | |
507 | ||
508 | If you are compiling a kernel for a NetWinder or EBSA-285, you will | |
509 | be able to select which LEDs are active using the options below. If | |
510 | you are compiling a kernel for the EBSA-110 or the LART however, the | |
511 | red LED will simply flash regularly to indicate that the system is | |
512 | still functional. It is safe to say Y here if you have a CATS | |
513 | system, but the driver will do nothing. | |
514 | ||
515 | config LEDS_TIMER | |
516 | bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ | |
517 | MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 | |
518 | depends on LEDS | |
519 | default y if ARCH_EBSA110 | |
520 | help | |
521 | If you say Y here, one of the system LEDs (the green one on the | |
522 | NetWinder, the amber one on the EBSA285, or the red one on the LART) | |
523 | will flash regularly to indicate that the system is still | |
524 | operational. This is mainly useful to kernel hackers who are | |
525 | debugging unstable kernels. | |
526 | ||
527 | The LART uses the same LED for both Timer LED and CPU usage LED | |
528 | functions. You may choose to use both, but the Timer LED function | |
529 | will overrule the CPU usage LED. | |
530 | ||
531 | config LEDS_CPU | |
532 | bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ | |
533 | !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 | |
534 | depends on LEDS | |
535 | help | |
536 | If you say Y here, the red LED will be used to give a good real | |
537 | time indication of CPU usage, by lighting whenever the idle task | |
538 | is not currently executing. | |
539 | ||
540 | The LART uses the same LED for both Timer LED and CPU usage LED | |
541 | functions. You may choose to use both, but the Timer LED function | |
542 | will overrule the CPU usage LED. | |
543 | ||
544 | config ALIGNMENT_TRAP | |
545 | bool | |
546 | default y if !ARCH_EBSA110 | |
547 | help | |
548 | ARM processors can not fetch/store information which is not | |
549 | naturally aligned on the bus, i.e., a 4 byte fetch must start at an | |
550 | address divisible by 4. On 32-bit ARM processors, these non-aligned | |
551 | fetch/store instructions will be emulated in software if you say | |
552 | here, which has a severe performance impact. This is necessary for | |
553 | correct operation of some network protocols. With an IP-only | |
554 | configuration it is safe to say N, otherwise say Y. | |
555 | ||
556 | endmenu | |
557 | ||
558 | menu "Boot options" | |
559 | ||
560 | # Compressed boot loader in ROM. Yes, we really want to ask about | |
561 | # TEXT and BSS so we preserve their values in the config files. | |
562 | config ZBOOT_ROM_TEXT | |
563 | hex "Compressed ROM boot loader base address" | |
564 | default "0" | |
565 | help | |
566 | The physical address at which the ROM-able zImage is to be | |
567 | placed in the target. Platforms which normally make use of | |
568 | ROM-able zImage formats normally set this to a suitable | |
569 | value in their defconfig file. | |
570 | ||
571 | If ZBOOT_ROM is not enabled, this has no effect. | |
572 | ||
573 | config ZBOOT_ROM_BSS | |
574 | hex "Compressed ROM boot loader BSS address" | |
575 | default "0" | |
576 | help | |
577 | The base address of 64KiB of read/write memory in the target | |
578 | for the ROM-able zImage, which must be available while the | |
579 | decompressor is running. Platforms which normally make use of | |
580 | ROM-able zImage formats normally set this to a suitable | |
581 | value in their defconfig file. | |
582 | ||
583 | If ZBOOT_ROM is not enabled, this has no effect. | |
584 | ||
585 | config ZBOOT_ROM | |
586 | bool "Compressed boot loader in ROM/flash" | |
587 | depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS | |
588 | help | |
589 | Say Y here if you intend to execute your compressed kernel image | |
590 | (zImage) directly from ROM or flash. If unsure, say N. | |
591 | ||
592 | config CMDLINE | |
593 | string "Default kernel command string" | |
594 | default "" | |
595 | help | |
596 | On some architectures (EBSA110 and CATS), there is currently no way | |
597 | for the boot loader to pass arguments to the kernel. For these | |
598 | architectures, you should supply some command-line options at build | |
599 | time by entering them here. As a minimum, you should specify the | |
600 | memory size and the root device (e.g., mem=64M root=/dev/nfs). | |
601 | ||
602 | config XIP_KERNEL | |
603 | bool "Kernel Execute-In-Place from ROM" | |
604 | depends on !ZBOOT_ROM | |
605 | help | |
606 | Execute-In-Place allows the kernel to run from non-volatile storage | |
607 | directly addressable by the CPU, such as NOR flash. This saves RAM | |
608 | space since the text section of the kernel is not loaded from flash | |
609 | to RAM. Read-write sections, such as the data section and stack, | |
610 | are still copied to RAM. The XIP kernel is not compressed since | |
611 | it has to run directly from flash, so it will take more space to | |
612 | store it. The flash address used to link the kernel object files, | |
613 | and for storing it, is configuration dependent. Therefore, if you | |
614 | say Y here, you must know the proper physical address where to | |
615 | store the kernel image depending on your own flash memory usage. | |
616 | ||
617 | Also note that the make target becomes "make xipImage" rather than | |
618 | "make zImage" or "make Image". The final kernel binary to put in | |
619 | ROM memory will be arch/arm/boot/xipImage. | |
620 | ||
621 | If unsure, say N. | |
622 | ||
623 | config XIP_PHYS_ADDR | |
624 | hex "XIP Kernel Physical Location" | |
625 | depends on XIP_KERNEL | |
626 | default "0x00080000" | |
627 | help | |
628 | This is the physical address in your flash memory the kernel will | |
629 | be linked for and stored to. This address is dependent on your | |
630 | own flash usage. | |
631 | ||
632 | endmenu | |
633 | ||
ec6bced6 | 634 | if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP1) |
1da177e4 LT |
635 | |
636 | menu "CPU Frequency scaling" | |
637 | ||
638 | source "drivers/cpufreq/Kconfig" | |
639 | ||
640 | config CPU_FREQ_SA1100 | |
641 | bool | |
07c6d48f | 642 | depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT) |
1da177e4 LT |
643 | default y |
644 | ||
645 | config CPU_FREQ_SA1110 | |
646 | bool | |
647 | depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3) | |
648 | default y | |
649 | ||
650 | config CPU_FREQ_INTEGRATOR | |
651 | tristate "CPUfreq driver for ARM Integrator CPUs" | |
652 | depends on ARCH_INTEGRATOR && CPU_FREQ | |
653 | default y | |
654 | help | |
655 | This enables the CPUfreq driver for ARM Integrator CPUs. | |
656 | ||
657 | For details, take a look at <file:Documentation/cpu-freq>. | |
658 | ||
659 | If in doubt, say Y. | |
660 | ||
661 | endmenu | |
662 | ||
663 | endif | |
664 | ||
665 | menu "Floating point emulation" | |
666 | ||
667 | comment "At least one emulation must be selected" | |
668 | ||
669 | config FPE_NWFPE | |
670 | bool "NWFPE math emulation" | |
8993a44c | 671 | depends on !AEABI || OABI_COMPAT |
1da177e4 LT |
672 | ---help--- |
673 | Say Y to include the NWFPE floating point emulator in the kernel. | |
674 | This is necessary to run most binaries. Linux does not currently | |
675 | support floating point hardware so you need to say Y here even if | |
676 | your machine has an FPA or floating point co-processor podule. | |
677 | ||
678 | You may say N here if you are going to load the Acorn FPEmulator | |
679 | early in the bootup. | |
680 | ||
681 | config FPE_NWFPE_XP | |
682 | bool "Support extended precision" | |
bedf142b | 683 | depends on FPE_NWFPE |
1da177e4 LT |
684 | help |
685 | Say Y to include 80-bit support in the kernel floating-point | |
686 | emulator. Otherwise, only 32 and 64-bit support is compiled in. | |
687 | Note that gcc does not generate 80-bit operations by default, | |
688 | so in most cases this option only enlarges the size of the | |
689 | floating point emulator without any good reason. | |
690 | ||
691 | You almost surely want to say N here. | |
692 | ||
693 | config FPE_FASTFPE | |
694 | bool "FastFPE math emulation (EXPERIMENTAL)" | |
8993a44c | 695 | depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL |
1da177e4 LT |
696 | ---help--- |
697 | Say Y here to include the FAST floating point emulator in the kernel. | |
698 | This is an experimental much faster emulator which now also has full | |
699 | precision for the mantissa. It does not support any exceptions. | |
700 | It is very simple, and approximately 3-6 times faster than NWFPE. | |
701 | ||
702 | It should be sufficient for most programs. It may be not suitable | |
703 | for scientific calculations, but you have to check this for yourself. | |
704 | If you do not feel you need a faster FP emulation you should better | |
705 | choose NWFPE. | |
706 | ||
707 | config VFP | |
708 | bool "VFP-format floating point maths" | |
709 | depends on CPU_V6 || CPU_ARM926T | |
710 | help | |
711 | Say Y to include VFP support code in the kernel. This is needed | |
712 | if your hardware includes a VFP unit. | |
713 | ||
714 | Please see <file:Documentation/arm/VFP/release-notes.txt> for | |
715 | release notes and additional status information. | |
716 | ||
717 | Say N if your target does not have VFP hardware. | |
718 | ||
719 | endmenu | |
720 | ||
721 | menu "Userspace binary formats" | |
722 | ||
723 | source "fs/Kconfig.binfmt" | |
724 | ||
725 | config ARTHUR | |
726 | tristate "RISC OS personality" | |
704bdda0 | 727 | depends on !AEABI |
1da177e4 LT |
728 | help |
729 | Say Y here to include the kernel code necessary if you want to run | |
730 | Acorn RISC OS/Arthur binaries under Linux. This code is still very | |
731 | experimental; if this sounds frightening, say N and sleep in peace. | |
732 | You can also say M here to compile this support as a module (which | |
733 | will be called arthur). | |
734 | ||
735 | endmenu | |
736 | ||
737 | menu "Power management options" | |
738 | ||
eceab4ac | 739 | source "kernel/power/Kconfig" |
1da177e4 | 740 | |
1da177e4 LT |
741 | config APM |
742 | tristate "Advanced Power Management Emulation" | |
1da177e4 LT |
743 | ---help--- |
744 | APM is a BIOS specification for saving power using several different | |
745 | techniques. This is mostly useful for battery powered laptops with | |
746 | APM compliant BIOSes. If you say Y here, the system time will be | |
747 | reset after a RESUME operation, the /proc/apm device will provide | |
748 | battery status information, and user-space programs will receive | |
749 | notification of APM "events" (e.g. battery status change). | |
750 | ||
1da177e4 LT |
751 | In order to use APM, you will need supporting software. For location |
752 | and more information, read <file:Documentation/pm.txt> and the | |
753 | Battery Powered Linux mini-HOWTO, available from | |
754 | <http://www.tldp.org/docs.html#howto>. | |
755 | ||
756 | This driver does not spin down disk drives (see the hdparm(8) | |
757 | manpage ("man 8 hdparm") for that), and it doesn't turn off | |
758 | VESA-compliant "green" monitors. | |
759 | ||
1da177e4 LT |
760 | Generally, if you don't have a battery in your machine, there isn't |
761 | much point in using this driver and you should say N. If you get | |
762 | random kernel OOPSes or reboots that don't seem to be related to | |
763 | anything, try disabling/enabling this option (or disabling/enabling | |
764 | APM in your BIOS). | |
765 | ||
1da177e4 LT |
766 | endmenu |
767 | ||
d5950b43 SR |
768 | source "net/Kconfig" |
769 | ||
1da177e4 LT |
770 | menu "Device Drivers" |
771 | ||
772 | source "drivers/base/Kconfig" | |
773 | ||
c35bf4a5 PM |
774 | source "drivers/connector/Kconfig" |
775 | ||
1da177e4 LT |
776 | if ALIGNMENT_TRAP |
777 | source "drivers/mtd/Kconfig" | |
778 | endif | |
779 | ||
780 | source "drivers/parport/Kconfig" | |
781 | ||
782 | source "drivers/pnp/Kconfig" | |
783 | ||
784 | source "drivers/block/Kconfig" | |
785 | ||
786 | source "drivers/acorn/block/Kconfig" | |
787 | ||
bb011b8e DB |
788 | if PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \ |
789 | || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \ | |
d56c524a | 790 | || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE |
1da177e4 LT |
791 | source "drivers/ide/Kconfig" |
792 | endif | |
793 | ||
794 | source "drivers/scsi/Kconfig" | |
795 | ||
796 | source "drivers/md/Kconfig" | |
797 | ||
798 | source "drivers/message/fusion/Kconfig" | |
799 | ||
800 | source "drivers/ieee1394/Kconfig" | |
801 | ||
802 | source "drivers/message/i2o/Kconfig" | |
803 | ||
d5950b43 | 804 | source "drivers/net/Kconfig" |
1da177e4 LT |
805 | |
806 | source "drivers/isdn/Kconfig" | |
807 | ||
808 | # input before char - char/joystick depends on it. As does USB. | |
809 | ||
810 | source "drivers/input/Kconfig" | |
811 | ||
812 | source "drivers/char/Kconfig" | |
813 | ||
814 | source "drivers/i2c/Kconfig" | |
815 | ||
8ae12a0d DB |
816 | source "drivers/spi/Kconfig" |
817 | ||
04916c0e AZ |
818 | source "drivers/w1/Kconfig" |
819 | ||
ad2f931d JD |
820 | source "drivers/hwmon/Kconfig" |
821 | ||
1da177e4 LT |
822 | #source "drivers/l3/Kconfig" |
823 | ||
824 | source "drivers/misc/Kconfig" | |
825 | ||
a4e137ab RK |
826 | source "drivers/mfd/Kconfig" |
827 | ||
1da177e4 LT |
828 | source "drivers/media/Kconfig" |
829 | ||
830 | source "drivers/video/Kconfig" | |
831 | ||
832 | source "sound/Kconfig" | |
833 | ||
834 | source "drivers/usb/Kconfig" | |
835 | ||
836 | source "drivers/mmc/Kconfig" | |
837 | ||
838 | endmenu | |
839 | ||
840 | source "fs/Kconfig" | |
841 | ||
842 | source "arch/arm/oprofile/Kconfig" | |
843 | ||
844 | source "arch/arm/Kconfig.debug" | |
845 | ||
846 | source "security/Kconfig" | |
847 | ||
848 | source "crypto/Kconfig" | |
849 | ||
850 | source "lib/Kconfig" |