[PATCH] hdaps: add support for Thinkpad R52
[deliverable/linux.git] / arch / arm / Kconfig
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1#
2# For a description of the syntax of this configuration file,
3# see Documentation/kbuild/kconfig-language.txt.
4#
5
6mainmenu "Linux Kernel Configuration"
7
8config ARM
9 bool
10 default y
12b824fb 11 select RTC_LIB
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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
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17 Europe. There is an ARM Linux project with a web page at
18 <http://www.arm.linux.org.uk/>.
19
20config MMU
21 bool
22 default y
23
24config EISA
25 bool
26 ---help---
27 The Extended Industry Standard Architecture (EISA) bus was
28 developed as an open alternative to the IBM MicroChannel bus.
29
30 The EISA bus provided some of the features of the IBM MicroChannel
31 bus while maintaining backward compatibility with cards made for
32 the older ISA bus. The EISA bus saw limited use between 1988 and
33 1995 when it was made obsolete by the PCI bus.
34
35 Say Y here if you are building a kernel for an EISA-based machine.
36
37 Otherwise, say N.
38
39config SBUS
40 bool
41
42config MCA
43 bool
44 help
45 MicroChannel Architecture is found in some IBM PS/2 machines and
46 laptops. It is a bus system similar to PCI or ISA. See
47 <file:Documentation/mca.txt> (and especially the web page given
48 there) before attempting to build an MCA bus kernel.
49
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50config RWSEM_GENERIC_SPINLOCK
51 bool
52 default y
53
54config RWSEM_XCHGADD_ALGORITHM
55 bool
56
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57config GENERIC_HWEIGHT
58 bool
59 default y
60
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61config GENERIC_CALIBRATE_DELAY
62 bool
63 default y
64
65config GENERIC_BUST_SPINLOCK
66 bool
67
a08b6b79
Z
68config ARCH_MAY_HAVE_PC_FDC
69 bool
70
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71config GENERIC_ISA_DMA
72 bool
73
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74config FIQ
75 bool
76
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77config ARCH_MTD_XIP
78 bool
79
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80config VECTORS_BASE
81 hex
82 default 0xffff0000 if MMU
83 default DRAM_BASE if REMAP_VECTORS_TO_RAM
84 default 0x00000000
85 help
86 The base address of exception vectors.
87
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88source "init/Kconfig"
89
90menu "System Type"
91
92choice
93 prompt "ARM system type"
6a0e2430 94 default ARCH_VERSATILE
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95
96config ARCH_CLPS7500
97 bool "Cirrus-CL-PS7500FE"
98 select TIMER_ACORN
f7e68bbf 99 select ISA
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100 help
101 Support for the Cirrus Logic PS7500FE system-on-a-chip.
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102
103config ARCH_CLPS711X
104 bool "CLPS711x/EP721x-based"
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105 help
106 Support for Cirrus Logic 711x/721x based boards.
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107
108config ARCH_CO285
109 bool "Co-EBSA285"
110 select FOOTBRIDGE
111 select FOOTBRIDGE_ADDIN
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112 help
113 Support for Intel's EBSA285 companion chip.
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114
115config ARCH_EBSA110
116 bool "EBSA-110"
f7e68bbf 117 select ISA
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118 help
119 This is an evaluation board for the StrongARM processor available
f6c8965a 120 from Digital. It has limited hardware on-board, including an
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121 Ethernet interface, two PCMCIA sockets, two serial ports and a
122 parallel port.
123
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124config ARCH_EP93XX
125 bool "EP93xx-based"
126 select ARM_AMBA
127 select ARM_VIC
128 help
129 This enables support for the Cirrus EP93xx series of CPUs.
130
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131config ARCH_FOOTBRIDGE
132 bool "FootBridge"
133 select FOOTBRIDGE
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134 help
135 Support for systems based on the DC21285 companion chip
136 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
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137
138config ARCH_INTEGRATOR
139 bool "Integrator"
140 select ARM_AMBA
141 select ICST525
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142 help
143 Support for ARM's Integrator platform.
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144
145config ARCH_IOP3XX
146 bool "IOP3xx-based"
f7e68bbf 147 select PCI
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148 help
149 Support for Intel's IOP3XX (XScale) family of processors.
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150
151config ARCH_IXP4XX
152 bool "IXP4xx-based"
153 select DMABOUNCE
f7e68bbf 154 select PCI
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155 help
156 Support for Intel's IXP4XX (XScale) family of processors.
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157
158config ARCH_IXP2000
159 bool "IXP2400/2800-based"
f7e68bbf 160 select PCI
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161 help
162 Support for Intel's IXP2400/2800 (XScale) family of processors.
1da177e4 163
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164config ARCH_IXP23XX
165 bool "IXP23XX-based"
166 select PCI
167 help
168 Support for Intel's IXP23xx (XScale) family of processors.
169
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170config ARCH_L7200
171 bool "LinkUp-L7200"
172 select FIQ
173 help
174 Say Y here if you intend to run this kernel on a LinkUp Systems
175 L7200 Software Development Board which uses an ARM720T processor.
176 Information on this board can be obtained at:
177
178 <http://www.linkupsys.com/>
179
180 If you have any questions or comments about the Linux kernel port
181 to this board, send e-mail to <sjhill@cotw.com>.
182
183config ARCH_PXA
184 bool "PXA2xx-based"
034d2f5a 185 select ARCH_MTD_XIP
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186 help
187 Support for Intel's PXA2XX processor line.
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188
189config ARCH_RPC
190 bool "RiscPC"
191 select ARCH_ACORN
192 select FIQ
193 select TIMER_ACORN
a08b6b79 194 select ARCH_MAY_HAVE_PC_FDC
065909b9 195 select ISA_DMA_API
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196 help
197 On the Acorn Risc-PC, Linux can support the internal IDE disk and
198 CD-ROM interface, serial and parallel port, and the floppy drive.
199
200config ARCH_SA1100
201 bool "SA1100-based"
f7e68bbf 202 select ISA
3cd9e19e 203 select ARCH_DISCONTIGMEM_ENABLE
034d2f5a 204 select ARCH_MTD_XIP
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205 help
206 Support for StrongARM 11x0 based boards.
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207
208config ARCH_S3C2410
209 bool "Samsung S3C2410"
210 help
211 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
212 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
f6c8965a 213 the Samsung SMDK2410 development board (and derivatives).
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214
215config ARCH_SHARK
216 bool "Shark"
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217 select ISA
218 select ISA_DMA
219 select PCI
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220 help
221 Support for the StrongARM based Digital DNARD machine, also known
222 as "Shark" (<http://www.shark-linux.de/shark.html>).
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223
224config ARCH_LH7A40X
225 bool "Sharp LH7A40X"
226 help
227 Say Y here for systems based on one of the Sharp LH7A40X
228 System on a Chip processors. These CPUs include an ARM922T
229 core with a wide array of integrated devices for
230 hand-held and low-power applications.
231
232config ARCH_OMAP
233 bool "TI OMAP"
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234 help
235 Support for TI's OMAP platform (OMAP1 and OMAP2).
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236
237config ARCH_VERSATILE
238 bool "Versatile"
239 select ARM_AMBA
fa0fe48f 240 select ARM_VIC
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241 select ICST307
242 help
243 This enables support for ARM Ltd Versatile board.
244
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245config ARCH_REALVIEW
246 bool "RealView"
247 select ARM_AMBA
248 select ICST307
249 help
250 This enables support for ARM Ltd RealView boards.
251
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252config ARCH_IMX
253 bool "IMX"
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254 help
255 Support for Motorola's i.MX family of processors (MX1, MXL).
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256
257config ARCH_H720X
258 bool "Hynix-HMS720x-based"
065909b9 259 select ISA_DMA_API
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260 help
261 This enables support for systems based on the Hynix HMS720x
262
038c5b60
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263config ARCH_AAEC2000
264 bool "Agilent AAEC-2000 based"
049eb329 265 select ARM_AMBA
038c5b60
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266 help
267 This enables support for systems based on the Agilent AAEC-2000
268
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269config ARCH_AT91RM9200
270 bool "AT91RM9200"
271 help
f999b8bd
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272 Say Y here if you intend to run this kernel on an Atmel
273 AT91RM9200-based board.
73a59c1c 274
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275endchoice
276
277source "arch/arm/mach-clps711x/Kconfig"
278
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279source "arch/arm/mach-ep93xx/Kconfig"
280
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281source "arch/arm/mach-footbridge/Kconfig"
282
283source "arch/arm/mach-integrator/Kconfig"
284
285source "arch/arm/mach-iop3xx/Kconfig"
286
287source "arch/arm/mach-ixp4xx/Kconfig"
288
289source "arch/arm/mach-ixp2000/Kconfig"
290
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291source "arch/arm/mach-ixp23xx/Kconfig"
292
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293source "arch/arm/mach-pxa/Kconfig"
294
295source "arch/arm/mach-sa1100/Kconfig"
296
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297source "arch/arm/plat-omap/Kconfig"
298
299source "arch/arm/mach-omap1/Kconfig"
1da177e4 300
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301source "arch/arm/mach-omap2/Kconfig"
302
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303source "arch/arm/mach-s3c2410/Kconfig"
304
305source "arch/arm/mach-lh7a40x/Kconfig"
306
307source "arch/arm/mach-imx/Kconfig"
308
309source "arch/arm/mach-h720x/Kconfig"
310
311source "arch/arm/mach-versatile/Kconfig"
312
038c5b60
BN
313source "arch/arm/mach-aaec2000/Kconfig"
314
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315source "arch/arm/mach-realview/Kconfig"
316
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317source "arch/arm/mach-at91rm9200/Kconfig"
318
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319# Definitions to make life easier
320config ARCH_ACORN
321 bool
322
323source arch/arm/mm/Kconfig
324
325# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
326config XSCALE_PMU
327 bool
328 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
329 default y
330
331endmenu
332
333source "arch/arm/common/Kconfig"
334
335config FORCE_MAX_ZONEORDER
336 int
337 depends on SA1111
338 default "9"
339
340menu "Bus support"
341
342config ARM_AMBA
343 bool
344
345config ISA
346 bool
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347 help
348 Find out whether you have ISA slots on your motherboard. ISA is the
349 name of a bus system, i.e. the way the CPU talks to the other stuff
350 inside your box. Other bus systems are PCI, EISA, MicroChannel
351 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
352 newer boards don't support it. If you have ISA, say Y, otherwise N.
353
065909b9 354# Select ISA DMA controller support
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355config ISA_DMA
356 bool
065909b9 357 select ISA_DMA_API
1da177e4 358
065909b9 359# Select ISA DMA interface
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AV
360config ISA_DMA_API
361 bool
5cae841b 362
1da177e4 363config PCI
c0da085a 364 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB
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365 help
366 Find out whether you have a PCI motherboard. PCI is the name of a
367 bus system, i.e. the way the CPU talks to the other stuff inside
368 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
369 VESA. If you have PCI, say Y, otherwise N.
370
371 The PCI-HOWTO, available from
372 <http://www.tldp.org/docs.html#howto>, contains valuable
373 information about which PCI hardware does work under Linux and which
374 doesn't.
375
376# Select the host bridge type
377config PCI_HOST_VIA82C505
378 bool
379 depends on PCI && ARCH_SHARK
380 default y
381
382source "drivers/pci/Kconfig"
383
384source "drivers/pcmcia/Kconfig"
385
386endmenu
387
388menu "Kernel Features"
389
390config SMP
391 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
f6db449c 392 depends on EXPERIMENTAL && REALVIEW_MPCORE
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393 help
394 This enables support for systems with more than one CPU. If you have
395 a system with only one CPU, like most personal computers, say N. If
396 you have a system with more than one CPU, say Y.
397
398 If you say N here, the kernel will run on single and multiprocessor
399 machines, but will use only one CPU of a multiprocessor machine. If
400 you say Y here, the kernel will run on many, but not all, single
401 processor machines. On a single processor machine, the kernel will
402 run faster if you say N here.
403
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404 See also the <file:Documentation/smp.txt>,
405 <file:Documentation/i386/IO-APIC.txt>,
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406 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
407 <http://www.linuxdoc.org/docs.html#howto>.
408
409 If you don't know what to do here, say N.
410
411config NR_CPUS
412 int "Maximum number of CPUs (2-32)"
413 range 2 32
414 depends on SMP
415 default "4"
416
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417config HOTPLUG_CPU
418 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
419 depends on SMP && HOTPLUG && EXPERIMENTAL
420 help
421 Say Y here to experiment with turning CPUs off and on. CPUs
422 can be controlled through /sys/devices/system/cpu.
423
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424config LOCAL_TIMERS
425 bool "Use local timer interrupts"
2a98beb6 426 depends on SMP && REALVIEW_MPCORE
37ee16ae
RK
427 default y
428 help
429 Enable support for local timers on SMP platforms, rather then the
430 legacy IPI broadcast method. Local timers allows the system
431 accounting to be spread across the timer interval, preventing a
432 "thundering herd" at every timer tick.
433
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434config PREEMPT
435 bool "Preemptible Kernel (EXPERIMENTAL)"
436 depends on EXPERIMENTAL
437 help
438 This option reduces the latency of the kernel when reacting to
439 real-time or interactive events by allowing a low priority process to
440 be preempted even if it is in kernel mode executing a system call.
441 This allows applications to run more reliably even when the system is
442 under load.
443
444 Say Y here if you are building a kernel for a desktop, embedded
445 or real-time system. Say N if you are unsure.
446
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447config NO_IDLE_HZ
448 bool "Dynamic tick timer"
449 help
450 Select this option if you want to disable continuous timer ticks
451 and have them programmed to occur as required. This option saves
452 power as the system can remain in idle state for longer.
453
454 By default dynamic tick is disabled during the boot, and can be
455 manually enabled with:
456
457 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
458
459 Alternatively, if you want dynamic tick automatically enabled
460 during boot, pass "dyntick=enable" via the kernel command string.
461
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462 Please note that dynamic tick may affect the accuracy of
463 timekeeping on some platforms depending on the implementation.
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NP
464 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
465 to have accurate timekeeping with dynamic tick.
f2be64b3 466
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467config HZ
468 int
469 default 128 if ARCH_L7200
470 default 200 if ARCH_EBSA110 || ARCH_S3C2410
bfe65704 471 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
f8065813
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472 default 100
473
704bdda0
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474config AEABI
475 bool "Use the ARM EABI to compile the kernel"
476 help
477 This option allows for the kernel to be compiled using the latest
478 ARM ABI (aka EABI). This is only useful if you are using a user
479 space environment that is also compiled with EABI.
480
481 Since there are major incompatibilities between the legacy ABI and
482 EABI, especially with regard to structure member alignment, this
483 option also changes the kernel syscall calling convention to
484 disambiguate both ABIs and allow for backward compatibility support
485 (selected with CONFIG_OABI_COMPAT).
486
487 To use this you need GCC version 4.0.0 or later.
488
6c90c872 489config OABI_COMPAT
a73a3ff1 490 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
61c484d4 491 depends on AEABI && EXPERIMENTAL
6c90c872
NP
492 default y
493 help
494 This option preserves the old syscall interface along with the
495 new (ARM EABI) one. It also provides a compatibility layer to
496 intercept syscalls that have structure arguments which layout
497 in memory differs between the legacy ABI and the new ARM EABI
498 (only for non "thumb" binaries). This option adds a tiny
499 overhead to all syscalls and produces a slightly larger kernel.
500 If you know you'll be using only pure EABI user space then you
501 can say N here. If this option is not selected and you attempt
502 to execute a legacy ABI binary then the result will be
503 UNPREDICTABLE (in fact it can be predicted that it won't work
504 at all). If in doubt say Y.
505
3f22ab27 506config ARCH_DISCONTIGMEM_ENABLE
1da177e4 507 bool
f7e68bbf 508 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
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509 help
510 Say Y to support efficient handling of discontiguous physical memory,
511 for architectures which are either NUMA (Non-Uniform Memory Access)
512 or have huge holes in the physical address space for other reasons.
513 See <file:Documentation/vm/numa> for more.
514
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515source "mm/Kconfig"
516
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517config LEDS
518 bool "Timer and CPU usage LEDs"
519 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
520 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
521 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
522 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
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SP
523 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
524 ARCH_AT91RM9200
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525 help
526 If you say Y here, the LEDs on your machine will be used
527 to provide useful information about your current system status.
528
529 If you are compiling a kernel for a NetWinder or EBSA-285, you will
530 be able to select which LEDs are active using the options below. If
531 you are compiling a kernel for the EBSA-110 or the LART however, the
532 red LED will simply flash regularly to indicate that the system is
533 still functional. It is safe to say Y here if you have a CATS
534 system, but the driver will do nothing.
535
536config LEDS_TIMER
537 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
538 MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
539 depends on LEDS
540 default y if ARCH_EBSA110
541 help
542 If you say Y here, one of the system LEDs (the green one on the
543 NetWinder, the amber one on the EBSA285, or the red one on the LART)
544 will flash regularly to indicate that the system is still
545 operational. This is mainly useful to kernel hackers who are
546 debugging unstable kernels.
547
548 The LART uses the same LED for both Timer LED and CPU usage LED
549 functions. You may choose to use both, but the Timer LED function
550 will overrule the CPU usage LED.
551
552config LEDS_CPU
553 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
554 !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
555 depends on LEDS
556 help
557 If you say Y here, the red LED will be used to give a good real
558 time indication of CPU usage, by lighting whenever the idle task
559 is not currently executing.
560
561 The LART uses the same LED for both Timer LED and CPU usage LED
562 functions. You may choose to use both, but the Timer LED function
563 will overrule the CPU usage LED.
564
565config ALIGNMENT_TRAP
566 bool
567 default y if !ARCH_EBSA110
568 help
569 ARM processors can not fetch/store information which is not
570 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
571 address divisible by 4. On 32-bit ARM processors, these non-aligned
572 fetch/store instructions will be emulated in software if you say
573 here, which has a severe performance impact. This is necessary for
574 correct operation of some network protocols. With an IP-only
575 configuration it is safe to say N, otherwise say Y.
576
577endmenu
578
579menu "Boot options"
580
581# Compressed boot loader in ROM. Yes, we really want to ask about
582# TEXT and BSS so we preserve their values in the config files.
583config ZBOOT_ROM_TEXT
584 hex "Compressed ROM boot loader base address"
585 default "0"
586 help
587 The physical address at which the ROM-able zImage is to be
588 placed in the target. Platforms which normally make use of
589 ROM-able zImage formats normally set this to a suitable
590 value in their defconfig file.
591
592 If ZBOOT_ROM is not enabled, this has no effect.
593
594config ZBOOT_ROM_BSS
595 hex "Compressed ROM boot loader BSS address"
596 default "0"
597 help
598 The base address of 64KiB of read/write memory in the target
599 for the ROM-able zImage, which must be available while the
600 decompressor is running. Platforms which normally make use of
601 ROM-able zImage formats normally set this to a suitable
602 value in their defconfig file.
603
604 If ZBOOT_ROM is not enabled, this has no effect.
605
606config ZBOOT_ROM
607 bool "Compressed boot loader in ROM/flash"
608 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
609 help
610 Say Y here if you intend to execute your compressed kernel image
611 (zImage) directly from ROM or flash. If unsure, say N.
612
613config CMDLINE
614 string "Default kernel command string"
615 default ""
616 help
617 On some architectures (EBSA110 and CATS), there is currently no way
618 for the boot loader to pass arguments to the kernel. For these
619 architectures, you should supply some command-line options at build
620 time by entering them here. As a minimum, you should specify the
621 memory size and the root device (e.g., mem=64M root=/dev/nfs).
622
623config XIP_KERNEL
624 bool "Kernel Execute-In-Place from ROM"
625 depends on !ZBOOT_ROM
626 help
627 Execute-In-Place allows the kernel to run from non-volatile storage
628 directly addressable by the CPU, such as NOR flash. This saves RAM
629 space since the text section of the kernel is not loaded from flash
630 to RAM. Read-write sections, such as the data section and stack,
631 are still copied to RAM. The XIP kernel is not compressed since
632 it has to run directly from flash, so it will take more space to
633 store it. The flash address used to link the kernel object files,
634 and for storing it, is configuration dependent. Therefore, if you
635 say Y here, you must know the proper physical address where to
636 store the kernel image depending on your own flash memory usage.
637
638 Also note that the make target becomes "make xipImage" rather than
639 "make zImage" or "make Image". The final kernel binary to put in
640 ROM memory will be arch/arm/boot/xipImage.
641
642 If unsure, say N.
643
644config XIP_PHYS_ADDR
645 hex "XIP Kernel Physical Location"
646 depends on XIP_KERNEL
647 default "0x00080000"
648 help
649 This is the physical address in your flash memory the kernel will
650 be linked for and stored to. This address is dependent on your
651 own flash usage.
652
653endmenu
654
ec6bced6 655if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP1)
1da177e4
LT
656
657menu "CPU Frequency scaling"
658
659source "drivers/cpufreq/Kconfig"
660
661config CPU_FREQ_SA1100
662 bool
07c6d48f 663 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1da177e4
LT
664 default y
665
666config CPU_FREQ_SA1110
667 bool
668 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
669 default y
670
671config CPU_FREQ_INTEGRATOR
672 tristate "CPUfreq driver for ARM Integrator CPUs"
673 depends on ARCH_INTEGRATOR && CPU_FREQ
674 default y
675 help
676 This enables the CPUfreq driver for ARM Integrator CPUs.
677
678 For details, take a look at <file:Documentation/cpu-freq>.
679
680 If in doubt, say Y.
681
682endmenu
683
684endif
685
686menu "Floating point emulation"
687
688comment "At least one emulation must be selected"
689
690config FPE_NWFPE
691 bool "NWFPE math emulation"
8993a44c 692 depends on !AEABI || OABI_COMPAT
1da177e4
LT
693 ---help---
694 Say Y to include the NWFPE floating point emulator in the kernel.
695 This is necessary to run most binaries. Linux does not currently
696 support floating point hardware so you need to say Y here even if
697 your machine has an FPA or floating point co-processor podule.
698
699 You may say N here if you are going to load the Acorn FPEmulator
700 early in the bootup.
701
702config FPE_NWFPE_XP
703 bool "Support extended precision"
bedf142b 704 depends on FPE_NWFPE
1da177e4
LT
705 help
706 Say Y to include 80-bit support in the kernel floating-point
707 emulator. Otherwise, only 32 and 64-bit support is compiled in.
708 Note that gcc does not generate 80-bit operations by default,
709 so in most cases this option only enlarges the size of the
710 floating point emulator without any good reason.
711
712 You almost surely want to say N here.
713
714config FPE_FASTFPE
715 bool "FastFPE math emulation (EXPERIMENTAL)"
8993a44c 716 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1da177e4
LT
717 ---help---
718 Say Y here to include the FAST floating point emulator in the kernel.
719 This is an experimental much faster emulator which now also has full
720 precision for the mantissa. It does not support any exceptions.
721 It is very simple, and approximately 3-6 times faster than NWFPE.
722
723 It should be sufficient for most programs. It may be not suitable
724 for scientific calculations, but you have to check this for yourself.
725 If you do not feel you need a faster FP emulation you should better
726 choose NWFPE.
727
728config VFP
729 bool "VFP-format floating point maths"
730 depends on CPU_V6 || CPU_ARM926T
731 help
732 Say Y to include VFP support code in the kernel. This is needed
733 if your hardware includes a VFP unit.
734
735 Please see <file:Documentation/arm/VFP/release-notes.txt> for
736 release notes and additional status information.
737
738 Say N if your target does not have VFP hardware.
739
740endmenu
741
742menu "Userspace binary formats"
743
744source "fs/Kconfig.binfmt"
745
746config ARTHUR
747 tristate "RISC OS personality"
704bdda0 748 depends on !AEABI
1da177e4
LT
749 help
750 Say Y here to include the kernel code necessary if you want to run
751 Acorn RISC OS/Arthur binaries under Linux. This code is still very
752 experimental; if this sounds frightening, say N and sleep in peace.
753 You can also say M here to compile this support as a module (which
754 will be called arthur).
755
756endmenu
757
758menu "Power management options"
759
eceab4ac 760source "kernel/power/Kconfig"
1da177e4 761
1da177e4
LT
762config APM
763 tristate "Advanced Power Management Emulation"
1da177e4
LT
764 ---help---
765 APM is a BIOS specification for saving power using several different
766 techniques. This is mostly useful for battery powered laptops with
767 APM compliant BIOSes. If you say Y here, the system time will be
768 reset after a RESUME operation, the /proc/apm device will provide
769 battery status information, and user-space programs will receive
770 notification of APM "events" (e.g. battery status change).
771
1da177e4
LT
772 In order to use APM, you will need supporting software. For location
773 and more information, read <file:Documentation/pm.txt> and the
774 Battery Powered Linux mini-HOWTO, available from
775 <http://www.tldp.org/docs.html#howto>.
776
777 This driver does not spin down disk drives (see the hdparm(8)
778 manpage ("man 8 hdparm") for that), and it doesn't turn off
779 VESA-compliant "green" monitors.
780
1da177e4
LT
781 Generally, if you don't have a battery in your machine, there isn't
782 much point in using this driver and you should say N. If you get
783 random kernel OOPSes or reboots that don't seem to be related to
784 anything, try disabling/enabling this option (or disabling/enabling
785 APM in your BIOS).
786
1da177e4
LT
787endmenu
788
d5950b43
SR
789source "net/Kconfig"
790
1da177e4
LT
791menu "Device Drivers"
792
793source "drivers/base/Kconfig"
794
c35bf4a5
PM
795source "drivers/connector/Kconfig"
796
1da177e4
LT
797if ALIGNMENT_TRAP
798source "drivers/mtd/Kconfig"
799endif
800
801source "drivers/parport/Kconfig"
802
803source "drivers/pnp/Kconfig"
804
805source "drivers/block/Kconfig"
806
807source "drivers/acorn/block/Kconfig"
808
bb011b8e
DB
809if PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \
810 || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
c4713074
LB
811 || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
812 || ARCH_IXP23XX
1da177e4
LT
813source "drivers/ide/Kconfig"
814endif
815
816source "drivers/scsi/Kconfig"
817
818source "drivers/md/Kconfig"
819
820source "drivers/message/fusion/Kconfig"
821
822source "drivers/ieee1394/Kconfig"
823
824source "drivers/message/i2o/Kconfig"
825
d5950b43 826source "drivers/net/Kconfig"
1da177e4
LT
827
828source "drivers/isdn/Kconfig"
829
830# input before char - char/joystick depends on it. As does USB.
831
832source "drivers/input/Kconfig"
833
834source "drivers/char/Kconfig"
835
836source "drivers/i2c/Kconfig"
837
8ae12a0d
DB
838source "drivers/spi/Kconfig"
839
04916c0e
AZ
840source "drivers/w1/Kconfig"
841
ad2f931d
JD
842source "drivers/hwmon/Kconfig"
843
1da177e4
LT
844#source "drivers/l3/Kconfig"
845
846source "drivers/misc/Kconfig"
847
a4e137ab
RK
848source "drivers/mfd/Kconfig"
849
c72a1d60
RP
850source "drivers/leds/Kconfig"
851
1da177e4
LT
852source "drivers/media/Kconfig"
853
854source "drivers/video/Kconfig"
855
856source "sound/Kconfig"
857
858source "drivers/usb/Kconfig"
859
860source "drivers/mmc/Kconfig"
861
12b824fb
AZ
862source "drivers/rtc/Kconfig"
863
1da177e4
LT
864endmenu
865
866source "fs/Kconfig"
867
868source "arch/arm/oprofile/Kconfig"
869
870source "arch/arm/Kconfig.debug"
871
872source "security/Kconfig"
873
874source "crypto/Kconfig"
875
876source "lib/Kconfig"
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