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 | |
12b824fb | 11 | select RTC_LIB |
1da177e4 LT |
12 | help |
13 | The ARM series is a line of low-power-consumption RISC chip designs | |
f6c8965a | 14 | licensed by ARM Ltd and targeted at embedded applications and |
1da177e4 | 15 | handhelds such as the Compaq IPAQ. ARM-based PCs are no longer |
f6c8965a | 16 | manufactured, but legacy ARM-based PC hardware remains popular in |
1da177e4 LT |
17 | Europe. There is an ARM Linux project with a web page at |
18 | <http://www.arm.linux.org.uk/>. | |
19 | ||
746140c7 KH |
20 | config GENERIC_TIME |
21 | bool | |
22 | default n | |
23 | ||
1da177e4 LT |
24 | config MMU |
25 | bool | |
26 | default y | |
27 | ||
28 | config EISA | |
29 | bool | |
30 | ---help--- | |
31 | The Extended Industry Standard Architecture (EISA) bus was | |
32 | developed as an open alternative to the IBM MicroChannel bus. | |
33 | ||
34 | The EISA bus provided some of the features of the IBM MicroChannel | |
35 | bus while maintaining backward compatibility with cards made for | |
36 | the older ISA bus. The EISA bus saw limited use between 1988 and | |
37 | 1995 when it was made obsolete by the PCI bus. | |
38 | ||
39 | Say Y here if you are building a kernel for an EISA-based machine. | |
40 | ||
41 | Otherwise, say N. | |
42 | ||
43 | config SBUS | |
44 | bool | |
45 | ||
46 | config MCA | |
47 | bool | |
48 | help | |
49 | MicroChannel Architecture is found in some IBM PS/2 machines and | |
50 | laptops. It is a bus system similar to PCI or ISA. See | |
51 | <file:Documentation/mca.txt> (and especially the web page given | |
52 | there) before attempting to build an MCA bus kernel. | |
53 | ||
4a2581a0 TG |
54 | config GENERIC_HARDIRQS |
55 | bool | |
56 | default y | |
57 | ||
7ad1bcb2 RK |
58 | config TRACE_IRQFLAGS_SUPPORT |
59 | bool | |
60 | default y | |
61 | ||
4a2581a0 TG |
62 | config HARDIRQS_SW_RESEND |
63 | bool | |
64 | default y | |
65 | ||
66 | config GENERIC_IRQ_PROBE | |
67 | bool | |
68 | default y | |
69 | ||
1da177e4 LT |
70 | config RWSEM_GENERIC_SPINLOCK |
71 | bool | |
72 | default y | |
73 | ||
74 | config RWSEM_XCHGADD_ALGORITHM | |
75 | bool | |
76 | ||
f0d1b0b3 DH |
77 | config ARCH_HAS_ILOG2_U32 |
78 | bool | |
79 | default n | |
80 | ||
81 | config ARCH_HAS_ILOG2_U64 | |
82 | bool | |
83 | default n | |
84 | ||
b89c3b16 AM |
85 | config GENERIC_HWEIGHT |
86 | bool | |
87 | default y | |
88 | ||
1da177e4 LT |
89 | config GENERIC_CALIBRATE_DELAY |
90 | bool | |
91 | default y | |
92 | ||
93 | config GENERIC_BUST_SPINLOCK | |
94 | bool | |
95 | ||
a08b6b79 Z |
96 | config ARCH_MAY_HAVE_PC_FDC |
97 | bool | |
98 | ||
1da177e4 LT |
99 | config GENERIC_ISA_DMA |
100 | bool | |
101 | ||
1da177e4 LT |
102 | config FIQ |
103 | bool | |
104 | ||
034d2f5a AV |
105 | config ARCH_MTD_XIP |
106 | bool | |
107 | ||
c760fc19 HC |
108 | config VECTORS_BASE |
109 | hex | |
6afd6fae | 110 | default 0xffff0000 if MMU || CPU_HIGH_VECTOR |
c760fc19 HC |
111 | default DRAM_BASE if REMAP_VECTORS_TO_RAM |
112 | default 0x00000000 | |
113 | help | |
114 | The base address of exception vectors. | |
115 | ||
1da177e4 LT |
116 | source "init/Kconfig" |
117 | ||
118 | menu "System Type" | |
119 | ||
120 | choice | |
121 | prompt "ARM system type" | |
6a0e2430 | 122 | default ARCH_VERSATILE |
1da177e4 | 123 | |
4af6fee1 DS |
124 | config ARCH_AAEC2000 |
125 | bool "Agilent AAEC-2000 based" | |
126 | select ARM_AMBA | |
127 | help | |
128 | This enables support for systems based on the Agilent AAEC-2000 | |
129 | ||
130 | config ARCH_INTEGRATOR | |
131 | bool "ARM Ltd. Integrator family" | |
132 | select ARM_AMBA | |
133 | select ICST525 | |
134 | help | |
135 | Support for ARM's Integrator platform. | |
136 | ||
137 | config ARCH_REALVIEW | |
138 | bool "ARM Ltd. RealView family" | |
139 | select ARM_AMBA | |
140 | select ICST307 | |
141 | help | |
142 | This enables support for ARM Ltd RealView boards. | |
143 | ||
144 | config ARCH_VERSATILE | |
145 | bool "ARM Ltd. Versatile family" | |
146 | select ARM_AMBA | |
147 | select ARM_VIC | |
148 | select ICST307 | |
149 | help | |
150 | This enables support for ARM Ltd Versatile board. | |
151 | ||
8fc5ffa0 AV |
152 | config ARCH_AT91 |
153 | bool "Atmel AT91" | |
4af6fee1 | 154 | help |
8fc5ffa0 AV |
155 | This enables support for systems based on the Atmel AT91RM9200 |
156 | and AT91SAM9xxx processors. | |
4af6fee1 | 157 | |
1da177e4 | 158 | config ARCH_CLPS7500 |
4af6fee1 | 159 | bool "Cirrus CL-PS7500FE" |
1da177e4 | 160 | select TIMER_ACORN |
f7e68bbf | 161 | select ISA |
f999b8bd MM |
162 | help |
163 | Support for the Cirrus Logic PS7500FE system-on-a-chip. | |
1da177e4 LT |
164 | |
165 | config ARCH_CLPS711X | |
4af6fee1 | 166 | bool "Cirrus Logic CLPS711x/EP721x-based" |
f999b8bd MM |
167 | help |
168 | Support for Cirrus Logic 711x/721x based boards. | |
1da177e4 LT |
169 | |
170 | config ARCH_CO285 | |
171 | bool "Co-EBSA285" | |
172 | select FOOTBRIDGE | |
173 | select FOOTBRIDGE_ADDIN | |
f999b8bd MM |
174 | help |
175 | Support for Intel's EBSA285 companion chip. | |
1da177e4 LT |
176 | |
177 | config ARCH_EBSA110 | |
178 | bool "EBSA-110" | |
f7e68bbf | 179 | select ISA |
1da177e4 LT |
180 | help |
181 | This is an evaluation board for the StrongARM processor available | |
f6c8965a | 182 | from Digital. It has limited hardware on-board, including an |
1da177e4 LT |
183 | Ethernet interface, two PCMCIA sockets, two serial ports and a |
184 | parallel port. | |
185 | ||
e7736d47 LB |
186 | config ARCH_EP93XX |
187 | bool "EP93xx-based" | |
188 | select ARM_AMBA | |
189 | select ARM_VIC | |
190 | help | |
191 | This enables support for the Cirrus EP93xx series of CPUs. | |
192 | ||
1da177e4 LT |
193 | config ARCH_FOOTBRIDGE |
194 | bool "FootBridge" | |
195 | select FOOTBRIDGE | |
f999b8bd MM |
196 | help |
197 | Support for systems based on the DC21285 companion chip | |
198 | ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. | |
1da177e4 | 199 | |
4af6fee1 DS |
200 | config ARCH_NETX |
201 | bool "Hilscher NetX based" | |
202 | select ARM_VIC | |
f999b8bd | 203 | help |
4af6fee1 DS |
204 | This enables support for systems based on the Hilscher NetX Soc |
205 | ||
206 | config ARCH_H720X | |
207 | bool "Hynix HMS720x-based" | |
208 | select ISA_DMA_API | |
209 | help | |
210 | This enables support for systems based on the Hynix HMS720x | |
211 | ||
212 | config ARCH_IMX | |
213 | bool "IMX" | |
214 | help | |
215 | Support for Motorola's i.MX family of processors (MX1, MXL). | |
1da177e4 | 216 | |
3f7e5815 LB |
217 | config ARCH_IOP32X |
218 | bool "IOP32x-based" | |
a4f7e763 | 219 | depends on MMU |
7ae1f7ec | 220 | select PLAT_IOP |
f7e68bbf | 221 | select PCI |
f999b8bd | 222 | help |
3f7e5815 LB |
223 | Support for Intel's 80219 and IOP32X (XScale) family of |
224 | processors. | |
225 | ||
226 | config ARCH_IOP33X | |
227 | bool "IOP33x-based" | |
228 | depends on MMU | |
7ae1f7ec | 229 | select PLAT_IOP |
3f7e5815 LB |
230 | select PCI |
231 | help | |
232 | Support for Intel's IOP33X (XScale) family of processors. | |
1da177e4 | 233 | |
285f5fa7 DW |
234 | config ARCH_IOP13XX |
235 | bool "IOP13xx-based" | |
236 | select PCI | |
237 | help | |
238 | Support for Intel's IOP13XX (XScale) family of processors. | |
239 | ||
1da177e4 LT |
240 | config ARCH_IXP4XX |
241 | bool "IXP4xx-based" | |
a4f7e763 | 242 | depends on MMU |
84904d0e | 243 | select GENERIC_TIME |
f999b8bd MM |
244 | help |
245 | Support for Intel's IXP4XX (XScale) family of processors. | |
1da177e4 LT |
246 | |
247 | config ARCH_IXP2000 | |
248 | bool "IXP2400/2800-based" | |
a4f7e763 | 249 | depends on MMU |
f7e68bbf | 250 | select PCI |
f999b8bd MM |
251 | help |
252 | Support for Intel's IXP2400/2800 (XScale) family of processors. | |
1da177e4 | 253 | |
c4713074 LB |
254 | config ARCH_IXP23XX |
255 | bool "IXP23XX-based" | |
a4f7e763 | 256 | depends on MMU |
c4713074 LB |
257 | select PCI |
258 | help | |
259 | Support for Intel's IXP23xx (XScale) family of processors. | |
260 | ||
1da177e4 LT |
261 | config ARCH_L7200 |
262 | bool "LinkUp-L7200" | |
263 | select FIQ | |
264 | help | |
265 | Say Y here if you intend to run this kernel on a LinkUp Systems | |
266 | L7200 Software Development Board which uses an ARM720T processor. | |
267 | Information on this board can be obtained at: | |
268 | ||
269 | <http://www.linkupsys.com/> | |
270 | ||
271 | If you have any questions or comments about the Linux kernel port | |
272 | to this board, send e-mail to <sjhill@cotw.com>. | |
273 | ||
4af6fee1 DS |
274 | config ARCH_PNX4008 |
275 | bool "Philips Nexperia PNX4008 Mobile" | |
276 | help | |
277 | This enables support for Philips PNX4008 mobile platform. | |
278 | ||
1da177e4 LT |
279 | config ARCH_PXA |
280 | bool "PXA2xx-based" | |
a4f7e763 | 281 | depends on MMU |
034d2f5a | 282 | select ARCH_MTD_XIP |
f999b8bd MM |
283 | help |
284 | Support for Intel's PXA2XX processor line. | |
1da177e4 LT |
285 | |
286 | config ARCH_RPC | |
287 | bool "RiscPC" | |
288 | select ARCH_ACORN | |
289 | select FIQ | |
290 | select TIMER_ACORN | |
a08b6b79 | 291 | select ARCH_MAY_HAVE_PC_FDC |
065909b9 | 292 | select ISA_DMA_API |
1da177e4 LT |
293 | help |
294 | On the Acorn Risc-PC, Linux can support the internal IDE disk and | |
295 | CD-ROM interface, serial and parallel port, and the floppy drive. | |
296 | ||
297 | config ARCH_SA1100 | |
298 | bool "SA1100-based" | |
f7e68bbf | 299 | select ISA |
3cd9e19e | 300 | select ARCH_DISCONTIGMEM_ENABLE |
034d2f5a | 301 | select ARCH_MTD_XIP |
f999b8bd MM |
302 | help |
303 | Support for StrongARM 11x0 based boards. | |
1da177e4 LT |
304 | |
305 | config ARCH_S3C2410 | |
cd701aa2 | 306 | bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442" |
1da177e4 LT |
307 | help |
308 | Samsung S3C2410X CPU based systems, such as the Simtec Electronics | |
309 | BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or | |
f6c8965a | 310 | the Samsung SMDK2410 development board (and derivatives). |
1da177e4 LT |
311 | |
312 | config ARCH_SHARK | |
313 | bool "Shark" | |
f7e68bbf RK |
314 | select ISA |
315 | select ISA_DMA | |
316 | select PCI | |
f999b8bd MM |
317 | help |
318 | Support for the StrongARM based Digital DNARD machine, also known | |
319 | as "Shark" (<http://www.shark-linux.de/shark.html>). | |
1da177e4 LT |
320 | |
321 | config ARCH_LH7A40X | |
322 | bool "Sharp LH7A40X" | |
323 | help | |
324 | Say Y here for systems based on one of the Sharp LH7A40X | |
325 | System on a Chip processors. These CPUs include an ARM922T | |
326 | core with a wide array of integrated devices for | |
327 | hand-held and low-power applications. | |
328 | ||
329 | config ARCH_OMAP | |
330 | bool "TI OMAP" | |
f999b8bd MM |
331 | help |
332 | Support for TI's OMAP platform (OMAP1 and OMAP2). | |
1da177e4 | 333 | |
1da177e4 LT |
334 | endchoice |
335 | ||
336 | source "arch/arm/mach-clps711x/Kconfig" | |
337 | ||
e7736d47 LB |
338 | source "arch/arm/mach-ep93xx/Kconfig" |
339 | ||
1da177e4 LT |
340 | source "arch/arm/mach-footbridge/Kconfig" |
341 | ||
342 | source "arch/arm/mach-integrator/Kconfig" | |
343 | ||
3f7e5815 LB |
344 | source "arch/arm/mach-iop32x/Kconfig" |
345 | ||
346 | source "arch/arm/mach-iop33x/Kconfig" | |
1da177e4 | 347 | |
285f5fa7 DW |
348 | source "arch/arm/mach-iop13xx/Kconfig" |
349 | ||
1da177e4 LT |
350 | source "arch/arm/mach-ixp4xx/Kconfig" |
351 | ||
352 | source "arch/arm/mach-ixp2000/Kconfig" | |
353 | ||
c4713074 LB |
354 | source "arch/arm/mach-ixp23xx/Kconfig" |
355 | ||
1da177e4 LT |
356 | source "arch/arm/mach-pxa/Kconfig" |
357 | ||
358 | source "arch/arm/mach-sa1100/Kconfig" | |
359 | ||
d48af15e TL |
360 | source "arch/arm/plat-omap/Kconfig" |
361 | ||
362 | source "arch/arm/mach-omap1/Kconfig" | |
1da177e4 | 363 | |
1dbae815 TL |
364 | source "arch/arm/mach-omap2/Kconfig" |
365 | ||
1da177e4 LT |
366 | source "arch/arm/mach-s3c2410/Kconfig" |
367 | ||
368 | source "arch/arm/mach-lh7a40x/Kconfig" | |
369 | ||
370 | source "arch/arm/mach-imx/Kconfig" | |
371 | ||
372 | source "arch/arm/mach-h720x/Kconfig" | |
373 | ||
374 | source "arch/arm/mach-versatile/Kconfig" | |
375 | ||
038c5b60 BN |
376 | source "arch/arm/mach-aaec2000/Kconfig" |
377 | ||
8ad68bbf CM |
378 | source "arch/arm/mach-realview/Kconfig" |
379 | ||
73a59c1c SP |
380 | source "arch/arm/mach-at91rm9200/Kconfig" |
381 | ||
bb6d8c88 SH |
382 | source "arch/arm/mach-netx/Kconfig" |
383 | ||
1da177e4 LT |
384 | # Definitions to make life easier |
385 | config ARCH_ACORN | |
386 | bool | |
387 | ||
7ae1f7ec LB |
388 | config PLAT_IOP |
389 | bool | |
390 | ||
1da177e4 LT |
391 | source arch/arm/mm/Kconfig |
392 | ||
afe4b25e LB |
393 | config IWMMXT |
394 | bool "Enable iWMMXt support" | |
395 | depends CPU_XSCALE || CPU_XSC3 | |
396 | default y if PXA27x | |
397 | help | |
398 | Enable support for iWMMXt context switching at run time if | |
399 | running on a CPU that supports it. | |
400 | ||
1da177e4 LT |
401 | # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER |
402 | config XSCALE_PMU | |
403 | bool | |
404 | depends on CPU_XSCALE && !XSCALE_PMU_TIMER | |
405 | default y | |
406 | ||
3b93e7b0 HC |
407 | if !MMU |
408 | source "arch/arm/Kconfig-nommu" | |
409 | endif | |
410 | ||
1da177e4 LT |
411 | endmenu |
412 | ||
413 | source "arch/arm/common/Kconfig" | |
414 | ||
415 | config FORCE_MAX_ZONEORDER | |
416 | int | |
417 | depends on SA1111 | |
418 | default "9" | |
419 | ||
420 | menu "Bus support" | |
421 | ||
422 | config ARM_AMBA | |
423 | bool | |
424 | ||
425 | config ISA | |
426 | bool | |
1da177e4 LT |
427 | help |
428 | Find out whether you have ISA slots on your motherboard. ISA is the | |
429 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
430 | inside your box. Other bus systems are PCI, EISA, MicroChannel | |
431 | (MCA) or VESA. ISA is an older system, now being displaced by PCI; | |
432 | newer boards don't support it. If you have ISA, say Y, otherwise N. | |
433 | ||
065909b9 | 434 | # Select ISA DMA controller support |
1da177e4 LT |
435 | config ISA_DMA |
436 | bool | |
065909b9 | 437 | select ISA_DMA_API |
1da177e4 | 438 | |
065909b9 | 439 | # Select ISA DMA interface |
5cae841b AV |
440 | config ISA_DMA_API |
441 | bool | |
5cae841b | 442 | |
1da177e4 | 443 | config PCI |
68939121 | 444 | bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX |
1da177e4 LT |
445 | help |
446 | Find out whether you have a PCI motherboard. PCI is the name of a | |
447 | bus system, i.e. the way the CPU talks to the other stuff inside | |
448 | your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or | |
449 | VESA. If you have PCI, say Y, otherwise N. | |
450 | ||
451 | The PCI-HOWTO, available from | |
452 | <http://www.tldp.org/docs.html#howto>, contains valuable | |
453 | information about which PCI hardware does work under Linux and which | |
454 | doesn't. | |
455 | ||
456 | # Select the host bridge type | |
457 | config PCI_HOST_VIA82C505 | |
458 | bool | |
459 | depends on PCI && ARCH_SHARK | |
460 | default y | |
461 | ||
462 | source "drivers/pci/Kconfig" | |
463 | ||
464 | source "drivers/pcmcia/Kconfig" | |
465 | ||
466 | endmenu | |
467 | ||
468 | menu "Kernel Features" | |
469 | ||
470 | config SMP | |
471 | bool "Symmetric Multi-Processing (EXPERIMENTAL)" | |
f6db449c | 472 | depends on EXPERIMENTAL && REALVIEW_MPCORE |
1da177e4 LT |
473 | help |
474 | This enables support for systems with more than one CPU. If you have | |
475 | a system with only one CPU, like most personal computers, say N. If | |
476 | you have a system with more than one CPU, say Y. | |
477 | ||
478 | If you say N here, the kernel will run on single and multiprocessor | |
479 | machines, but will use only one CPU of a multiprocessor machine. If | |
480 | you say Y here, the kernel will run on many, but not all, single | |
481 | processor machines. On a single processor machine, the kernel will | |
482 | run faster if you say N here. | |
483 | ||
12c62c2e AO |
484 | See also the <file:Documentation/smp.txt>, |
485 | <file:Documentation/i386/IO-APIC.txt>, | |
1da177e4 LT |
486 | <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at |
487 | <http://www.linuxdoc.org/docs.html#howto>. | |
488 | ||
489 | If you don't know what to do here, say N. | |
490 | ||
491 | config NR_CPUS | |
492 | int "Maximum number of CPUs (2-32)" | |
493 | range 2 32 | |
494 | depends on SMP | |
495 | default "4" | |
496 | ||
a054a811 RK |
497 | config HOTPLUG_CPU |
498 | bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" | |
499 | depends on SMP && HOTPLUG && EXPERIMENTAL | |
500 | help | |
501 | Say Y here to experiment with turning CPUs off and on. CPUs | |
502 | can be controlled through /sys/devices/system/cpu. | |
503 | ||
37ee16ae RK |
504 | config LOCAL_TIMERS |
505 | bool "Use local timer interrupts" | |
2a98beb6 | 506 | depends on SMP && REALVIEW_MPCORE |
37ee16ae RK |
507 | default y |
508 | help | |
509 | Enable support for local timers on SMP platforms, rather then the | |
510 | legacy IPI broadcast method. Local timers allows the system | |
511 | accounting to be spread across the timer interval, preventing a | |
512 | "thundering herd" at every timer tick. | |
513 | ||
1da177e4 LT |
514 | config PREEMPT |
515 | bool "Preemptible Kernel (EXPERIMENTAL)" | |
516 | depends on EXPERIMENTAL | |
517 | help | |
518 | This option reduces the latency of the kernel when reacting to | |
519 | real-time or interactive events by allowing a low priority process to | |
520 | be preempted even if it is in kernel mode executing a system call. | |
521 | This allows applications to run more reliably even when the system is | |
522 | under load. | |
523 | ||
524 | Say Y here if you are building a kernel for a desktop, embedded | |
525 | or real-time system. Say N if you are unsure. | |
526 | ||
8749af68 RK |
527 | config NO_IDLE_HZ |
528 | bool "Dynamic tick timer" | |
529 | help | |
530 | Select this option if you want to disable continuous timer ticks | |
531 | and have them programmed to occur as required. This option saves | |
532 | power as the system can remain in idle state for longer. | |
533 | ||
534 | By default dynamic tick is disabled during the boot, and can be | |
535 | manually enabled with: | |
536 | ||
537 | echo 1 > /sys/devices/system/timer/timer0/dyn_tick | |
538 | ||
539 | Alternatively, if you want dynamic tick automatically enabled | |
540 | during boot, pass "dyntick=enable" via the kernel command string. | |
541 | ||
f2be64b3 TL |
542 | Please note that dynamic tick may affect the accuracy of |
543 | timekeeping on some platforms depending on the implementation. | |
569d2c34 NP |
544 | Currently at least OMAP, PXA2xx and SA11x0 platforms are known |
545 | to have accurate timekeeping with dynamic tick. | |
f2be64b3 | 546 | |
f8065813 RK |
547 | config HZ |
548 | int | |
549 | default 128 if ARCH_L7200 | |
550 | default 200 if ARCH_EBSA110 || ARCH_S3C2410 | |
bfe65704 | 551 | default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER |
f8065813 RK |
552 | default 100 |
553 | ||
704bdda0 NP |
554 | config AEABI |
555 | bool "Use the ARM EABI to compile the kernel" | |
556 | help | |
557 | This option allows for the kernel to be compiled using the latest | |
558 | ARM ABI (aka EABI). This is only useful if you are using a user | |
559 | space environment that is also compiled with EABI. | |
560 | ||
561 | Since there are major incompatibilities between the legacy ABI and | |
562 | EABI, especially with regard to structure member alignment, this | |
563 | option also changes the kernel syscall calling convention to | |
564 | disambiguate both ABIs and allow for backward compatibility support | |
565 | (selected with CONFIG_OABI_COMPAT). | |
566 | ||
567 | To use this you need GCC version 4.0.0 or later. | |
568 | ||
6c90c872 | 569 | config OABI_COMPAT |
a73a3ff1 | 570 | bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" |
61c484d4 | 571 | depends on AEABI && EXPERIMENTAL |
6c90c872 NP |
572 | default y |
573 | help | |
574 | This option preserves the old syscall interface along with the | |
575 | new (ARM EABI) one. It also provides a compatibility layer to | |
576 | intercept syscalls that have structure arguments which layout | |
577 | in memory differs between the legacy ABI and the new ARM EABI | |
578 | (only for non "thumb" binaries). This option adds a tiny | |
579 | overhead to all syscalls and produces a slightly larger kernel. | |
580 | If you know you'll be using only pure EABI user space then you | |
581 | can say N here. If this option is not selected and you attempt | |
582 | to execute a legacy ABI binary then the result will be | |
583 | UNPREDICTABLE (in fact it can be predicted that it won't work | |
584 | at all). If in doubt say Y. | |
585 | ||
3f22ab27 | 586 | config ARCH_DISCONTIGMEM_ENABLE |
1da177e4 | 587 | bool |
f7e68bbf | 588 | default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM) |
1da177e4 LT |
589 | help |
590 | Say Y to support efficient handling of discontiguous physical memory, | |
591 | for architectures which are either NUMA (Non-Uniform Memory Access) | |
592 | or have huge holes in the physical address space for other reasons. | |
593 | See <file:Documentation/vm/numa> for more. | |
594 | ||
c80d79d7 YG |
595 | config NODES_SHIFT |
596 | int | |
597 | default "4" if ARCH_LH7A40X | |
598 | default "2" | |
599 | depends on NEED_MULTIPLE_NODES | |
600 | ||
3f22ab27 DH |
601 | source "mm/Kconfig" |
602 | ||
1da177e4 LT |
603 | config LEDS |
604 | bool "Timer and CPU usage LEDs" | |
605 | depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \ | |
606 | ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \ | |
607 | ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ | |
608 | ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ | |
73a59c1c | 609 | ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \ |
58a0cd78 | 610 | ARCH_AT91 || MACH_TRIZEPS4 |
1da177e4 LT |
611 | help |
612 | If you say Y here, the LEDs on your machine will be used | |
613 | to provide useful information about your current system status. | |
614 | ||
615 | If you are compiling a kernel for a NetWinder or EBSA-285, you will | |
616 | be able to select which LEDs are active using the options below. If | |
617 | you are compiling a kernel for the EBSA-110 or the LART however, the | |
618 | red LED will simply flash regularly to indicate that the system is | |
619 | still functional. It is safe to say Y here if you have a CATS | |
620 | system, but the driver will do nothing. | |
621 | ||
622 | config LEDS_TIMER | |
623 | bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ | |
624 | MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 | |
625 | depends on LEDS | |
626 | default y if ARCH_EBSA110 | |
627 | help | |
628 | If you say Y here, one of the system LEDs (the green one on the | |
629 | NetWinder, the amber one on the EBSA285, or the red one on the LART) | |
630 | will flash regularly to indicate that the system is still | |
631 | operational. This is mainly useful to kernel hackers who are | |
632 | debugging unstable kernels. | |
633 | ||
634 | The LART uses the same LED for both Timer LED and CPU usage LED | |
635 | functions. You may choose to use both, but the Timer LED function | |
636 | will overrule the CPU usage LED. | |
637 | ||
638 | config LEDS_CPU | |
639 | bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ | |
640 | !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 | |
641 | depends on LEDS | |
642 | help | |
643 | If you say Y here, the red LED will be used to give a good real | |
644 | time indication of CPU usage, by lighting whenever the idle task | |
645 | is not currently executing. | |
646 | ||
647 | The LART uses the same LED for both Timer LED and CPU usage LED | |
648 | functions. You may choose to use both, but the Timer LED function | |
649 | will overrule the CPU usage LED. | |
650 | ||
651 | config ALIGNMENT_TRAP | |
652 | bool | |
f12d0d7c | 653 | depends on CPU_CP15_MMU |
1da177e4 LT |
654 | default y if !ARCH_EBSA110 |
655 | help | |
84eb8d06 | 656 | ARM processors cannot fetch/store information which is not |
1da177e4 LT |
657 | naturally aligned on the bus, i.e., a 4 byte fetch must start at an |
658 | address divisible by 4. On 32-bit ARM processors, these non-aligned | |
659 | fetch/store instructions will be emulated in software if you say | |
660 | here, which has a severe performance impact. This is necessary for | |
661 | correct operation of some network protocols. With an IP-only | |
662 | configuration it is safe to say N, otherwise say Y. | |
663 | ||
664 | endmenu | |
665 | ||
666 | menu "Boot options" | |
667 | ||
668 | # Compressed boot loader in ROM. Yes, we really want to ask about | |
669 | # TEXT and BSS so we preserve their values in the config files. | |
670 | config ZBOOT_ROM_TEXT | |
671 | hex "Compressed ROM boot loader base address" | |
672 | default "0" | |
673 | help | |
674 | The physical address at which the ROM-able zImage is to be | |
675 | placed in the target. Platforms which normally make use of | |
676 | ROM-able zImage formats normally set this to a suitable | |
677 | value in their defconfig file. | |
678 | ||
679 | If ZBOOT_ROM is not enabled, this has no effect. | |
680 | ||
681 | config ZBOOT_ROM_BSS | |
682 | hex "Compressed ROM boot loader BSS address" | |
683 | default "0" | |
684 | help | |
f8c440b2 DF |
685 | The base address of an area of read/write memory in the target |
686 | for the ROM-able zImage which must be available while the | |
687 | decompressor is running. It must be large enough to hold the | |
688 | entire decompressed kernel plus an additional 128 KiB. | |
689 | Platforms which normally make use of ROM-able zImage formats | |
690 | normally set this to a suitable value in their defconfig file. | |
1da177e4 LT |
691 | |
692 | If ZBOOT_ROM is not enabled, this has no effect. | |
693 | ||
694 | config ZBOOT_ROM | |
695 | bool "Compressed boot loader in ROM/flash" | |
696 | depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS | |
697 | help | |
698 | Say Y here if you intend to execute your compressed kernel image | |
699 | (zImage) directly from ROM or flash. If unsure, say N. | |
700 | ||
701 | config CMDLINE | |
702 | string "Default kernel command string" | |
703 | default "" | |
704 | help | |
705 | On some architectures (EBSA110 and CATS), there is currently no way | |
706 | for the boot loader to pass arguments to the kernel. For these | |
707 | architectures, you should supply some command-line options at build | |
708 | time by entering them here. As a minimum, you should specify the | |
709 | memory size and the root device (e.g., mem=64M root=/dev/nfs). | |
710 | ||
711 | config XIP_KERNEL | |
712 | bool "Kernel Execute-In-Place from ROM" | |
713 | depends on !ZBOOT_ROM | |
714 | help | |
715 | Execute-In-Place allows the kernel to run from non-volatile storage | |
716 | directly addressable by the CPU, such as NOR flash. This saves RAM | |
717 | space since the text section of the kernel is not loaded from flash | |
718 | to RAM. Read-write sections, such as the data section and stack, | |
719 | are still copied to RAM. The XIP kernel is not compressed since | |
720 | it has to run directly from flash, so it will take more space to | |
721 | store it. The flash address used to link the kernel object files, | |
722 | and for storing it, is configuration dependent. Therefore, if you | |
723 | say Y here, you must know the proper physical address where to | |
724 | store the kernel image depending on your own flash memory usage. | |
725 | ||
726 | Also note that the make target becomes "make xipImage" rather than | |
727 | "make zImage" or "make Image". The final kernel binary to put in | |
728 | ROM memory will be arch/arm/boot/xipImage. | |
729 | ||
730 | If unsure, say N. | |
731 | ||
732 | config XIP_PHYS_ADDR | |
733 | hex "XIP Kernel Physical Location" | |
734 | depends on XIP_KERNEL | |
735 | default "0x00080000" | |
736 | help | |
737 | This is the physical address in your flash memory the kernel will | |
738 | be linked for and stored to. This address is dependent on your | |
739 | own flash usage. | |
740 | ||
741 | endmenu | |
742 | ||
3c8cd0cc | 743 | if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX ) |
1da177e4 LT |
744 | |
745 | menu "CPU Frequency scaling" | |
746 | ||
747 | source "drivers/cpufreq/Kconfig" | |
748 | ||
749 | config CPU_FREQ_SA1100 | |
750 | bool | |
07c6d48f | 751 | depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT) |
1da177e4 LT |
752 | default y |
753 | ||
754 | config CPU_FREQ_SA1110 | |
755 | bool | |
756 | depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3) | |
757 | default y | |
758 | ||
759 | config CPU_FREQ_INTEGRATOR | |
760 | tristate "CPUfreq driver for ARM Integrator CPUs" | |
761 | depends on ARCH_INTEGRATOR && CPU_FREQ | |
762 | default y | |
763 | help | |
764 | This enables the CPUfreq driver for ARM Integrator CPUs. | |
765 | ||
766 | For details, take a look at <file:Documentation/cpu-freq>. | |
767 | ||
768 | If in doubt, say Y. | |
769 | ||
3c8cd0cc PP |
770 | config CPU_FREQ_IMX |
771 | tristate "CPUfreq driver for i.MX CPUs" | |
772 | depends on ARCH_IMX && CPU_FREQ | |
773 | default n | |
774 | help | |
775 | This enables the CPUfreq driver for i.MX CPUs. | |
776 | ||
777 | If in doubt, say N. | |
778 | ||
1da177e4 LT |
779 | endmenu |
780 | ||
781 | endif | |
782 | ||
783 | menu "Floating point emulation" | |
784 | ||
785 | comment "At least one emulation must be selected" | |
786 | ||
787 | config FPE_NWFPE | |
788 | bool "NWFPE math emulation" | |
8993a44c | 789 | depends on !AEABI || OABI_COMPAT |
1da177e4 LT |
790 | ---help--- |
791 | Say Y to include the NWFPE floating point emulator in the kernel. | |
792 | This is necessary to run most binaries. Linux does not currently | |
793 | support floating point hardware so you need to say Y here even if | |
794 | your machine has an FPA or floating point co-processor podule. | |
795 | ||
796 | You may say N here if you are going to load the Acorn FPEmulator | |
797 | early in the bootup. | |
798 | ||
799 | config FPE_NWFPE_XP | |
800 | bool "Support extended precision" | |
bedf142b | 801 | depends on FPE_NWFPE |
1da177e4 LT |
802 | help |
803 | Say Y to include 80-bit support in the kernel floating-point | |
804 | emulator. Otherwise, only 32 and 64-bit support is compiled in. | |
805 | Note that gcc does not generate 80-bit operations by default, | |
806 | so in most cases this option only enlarges the size of the | |
807 | floating point emulator without any good reason. | |
808 | ||
809 | You almost surely want to say N here. | |
810 | ||
811 | config FPE_FASTFPE | |
812 | bool "FastFPE math emulation (EXPERIMENTAL)" | |
8993a44c | 813 | depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL |
1da177e4 LT |
814 | ---help--- |
815 | Say Y here to include the FAST floating point emulator in the kernel. | |
816 | This is an experimental much faster emulator which now also has full | |
817 | precision for the mantissa. It does not support any exceptions. | |
818 | It is very simple, and approximately 3-6 times faster than NWFPE. | |
819 | ||
820 | It should be sufficient for most programs. It may be not suitable | |
821 | for scientific calculations, but you have to check this for yourself. | |
822 | If you do not feel you need a faster FP emulation you should better | |
823 | choose NWFPE. | |
824 | ||
825 | config VFP | |
826 | bool "VFP-format floating point maths" | |
827 | depends on CPU_V6 || CPU_ARM926T | |
828 | help | |
829 | Say Y to include VFP support code in the kernel. This is needed | |
830 | if your hardware includes a VFP unit. | |
831 | ||
832 | Please see <file:Documentation/arm/VFP/release-notes.txt> for | |
833 | release notes and additional status information. | |
834 | ||
835 | Say N if your target does not have VFP hardware. | |
836 | ||
837 | endmenu | |
838 | ||
839 | menu "Userspace binary formats" | |
840 | ||
841 | source "fs/Kconfig.binfmt" | |
842 | ||
843 | config ARTHUR | |
844 | tristate "RISC OS personality" | |
704bdda0 | 845 | depends on !AEABI |
1da177e4 LT |
846 | help |
847 | Say Y here to include the kernel code necessary if you want to run | |
848 | Acorn RISC OS/Arthur binaries under Linux. This code is still very | |
849 | experimental; if this sounds frightening, say N and sleep in peace. | |
850 | You can also say M here to compile this support as a module (which | |
851 | will be called arthur). | |
852 | ||
853 | endmenu | |
854 | ||
855 | menu "Power management options" | |
856 | ||
eceab4ac | 857 | source "kernel/power/Kconfig" |
1da177e4 | 858 | |
1da177e4 LT |
859 | config APM |
860 | tristate "Advanced Power Management Emulation" | |
1da177e4 LT |
861 | ---help--- |
862 | APM is a BIOS specification for saving power using several different | |
863 | techniques. This is mostly useful for battery powered laptops with | |
864 | APM compliant BIOSes. If you say Y here, the system time will be | |
865 | reset after a RESUME operation, the /proc/apm device will provide | |
866 | battery status information, and user-space programs will receive | |
867 | notification of APM "events" (e.g. battery status change). | |
868 | ||
1da177e4 LT |
869 | In order to use APM, you will need supporting software. For location |
870 | and more information, read <file:Documentation/pm.txt> and the | |
871 | Battery Powered Linux mini-HOWTO, available from | |
872 | <http://www.tldp.org/docs.html#howto>. | |
873 | ||
874 | This driver does not spin down disk drives (see the hdparm(8) | |
875 | manpage ("man 8 hdparm") for that), and it doesn't turn off | |
876 | VESA-compliant "green" monitors. | |
877 | ||
1da177e4 LT |
878 | Generally, if you don't have a battery in your machine, there isn't |
879 | much point in using this driver and you should say N. If you get | |
880 | random kernel OOPSes or reboots that don't seem to be related to | |
881 | anything, try disabling/enabling this option (or disabling/enabling | |
882 | APM in your BIOS). | |
883 | ||
1da177e4 LT |
884 | endmenu |
885 | ||
d5950b43 SR |
886 | source "net/Kconfig" |
887 | ||
1da177e4 LT |
888 | menu "Device Drivers" |
889 | ||
890 | source "drivers/base/Kconfig" | |
891 | ||
c35bf4a5 PM |
892 | source "drivers/connector/Kconfig" |
893 | ||
f12d0d7c | 894 | if ALIGNMENT_TRAP || !CPU_CP15_MMU |
1da177e4 LT |
895 | source "drivers/mtd/Kconfig" |
896 | endif | |
897 | ||
898 | source "drivers/parport/Kconfig" | |
899 | ||
900 | source "drivers/pnp/Kconfig" | |
901 | ||
902 | source "drivers/block/Kconfig" | |
903 | ||
904 | source "drivers/acorn/block/Kconfig" | |
905 | ||
3f7e5815 | 906 | if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \ |
bb011b8e | 907 | || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \ |
c4713074 LB |
908 | || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \ |
909 | || ARCH_IXP23XX | |
1da177e4 LT |
910 | source "drivers/ide/Kconfig" |
911 | endif | |
912 | ||
913 | source "drivers/scsi/Kconfig" | |
914 | ||
eb370f0b MM |
915 | source "drivers/ata/Kconfig" |
916 | ||
1da177e4 LT |
917 | source "drivers/md/Kconfig" |
918 | ||
919 | source "drivers/message/fusion/Kconfig" | |
920 | ||
921 | source "drivers/ieee1394/Kconfig" | |
922 | ||
923 | source "drivers/message/i2o/Kconfig" | |
924 | ||
d5950b43 | 925 | source "drivers/net/Kconfig" |
1da177e4 LT |
926 | |
927 | source "drivers/isdn/Kconfig" | |
928 | ||
929 | # input before char - char/joystick depends on it. As does USB. | |
930 | ||
931 | source "drivers/input/Kconfig" | |
932 | ||
933 | source "drivers/char/Kconfig" | |
934 | ||
935 | source "drivers/i2c/Kconfig" | |
936 | ||
8ae12a0d DB |
937 | source "drivers/spi/Kconfig" |
938 | ||
04916c0e AZ |
939 | source "drivers/w1/Kconfig" |
940 | ||
ad2f931d JD |
941 | source "drivers/hwmon/Kconfig" |
942 | ||
1da177e4 LT |
943 | #source "drivers/l3/Kconfig" |
944 | ||
945 | source "drivers/misc/Kconfig" | |
946 | ||
a4e137ab RK |
947 | source "drivers/mfd/Kconfig" |
948 | ||
c72a1d60 RP |
949 | source "drivers/leds/Kconfig" |
950 | ||
1da177e4 LT |
951 | source "drivers/media/Kconfig" |
952 | ||
953 | source "drivers/video/Kconfig" | |
954 | ||
955 | source "sound/Kconfig" | |
956 | ||
c2dade51 SH |
957 | source "drivers/hid/Kconfig" |
958 | ||
1da177e4 LT |
959 | source "drivers/usb/Kconfig" |
960 | ||
961 | source "drivers/mmc/Kconfig" | |
962 | ||
12b824fb AZ |
963 | source "drivers/rtc/Kconfig" |
964 | ||
1da177e4 LT |
965 | endmenu |
966 | ||
967 | source "fs/Kconfig" | |
968 | ||
969 | source "arch/arm/oprofile/Kconfig" | |
970 | ||
971 | source "arch/arm/Kconfig.debug" | |
972 | ||
973 | source "security/Kconfig" | |
974 | ||
975 | source "crypto/Kconfig" | |
976 | ||
977 | source "lib/Kconfig" |