xref: /openbmc/linux/arch/arm/Kconfig (revision e868d61272caa648214046a096e5a6bfc068dc8c)
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
11	select RTC_LIB
12	select SYS_SUPPORTS_APM_EMULATION
13	help
14	  The ARM series is a line of low-power-consumption RISC chip designs
15	  licensed by ARM Ltd and targeted at embedded applications and
16	  handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
17	  manufactured, but legacy ARM-based PC hardware remains popular in
18	  Europe.  There is an ARM Linux project with a web page at
19	  <http://www.arm.linux.org.uk/>.
20
21config SYS_SUPPORTS_APM_EMULATION
22	bool
23
24config GENERIC_GPIO
25	bool
26	default n
27
28config GENERIC_TIME
29	bool
30	default n
31
32config GENERIC_CLOCKEVENTS
33	bool
34	default n
35
36config MMU
37	bool
38	default y
39
40config NO_IOPORT
41	bool
42	default n
43
44config EISA
45	bool
46	---help---
47	  The Extended Industry Standard Architecture (EISA) bus was
48	  developed as an open alternative to the IBM MicroChannel bus.
49
50	  The EISA bus provided some of the features of the IBM MicroChannel
51	  bus while maintaining backward compatibility with cards made for
52	  the older ISA bus.  The EISA bus saw limited use between 1988 and
53	  1995 when it was made obsolete by the PCI bus.
54
55	  Say Y here if you are building a kernel for an EISA-based machine.
56
57	  Otherwise, say N.
58
59config SBUS
60	bool
61
62config MCA
63	bool
64	help
65	  MicroChannel Architecture is found in some IBM PS/2 machines and
66	  laptops.  It is a bus system similar to PCI or ISA. See
67	  <file:Documentation/mca.txt> (and especially the web page given
68	  there) before attempting to build an MCA bus kernel.
69
70config GENERIC_HARDIRQS
71	bool
72	default y
73
74config STACKTRACE_SUPPORT
75	bool
76	default y
77
78config LOCKDEP_SUPPORT
79	bool
80	default y
81
82config TRACE_IRQFLAGS_SUPPORT
83	bool
84	default y
85
86config HARDIRQS_SW_RESEND
87	bool
88	default y
89
90config GENERIC_IRQ_PROBE
91	bool
92	default y
93
94config RWSEM_GENERIC_SPINLOCK
95	bool
96	default y
97
98config RWSEM_XCHGADD_ALGORITHM
99	bool
100
101config ARCH_HAS_ILOG2_U32
102	bool
103	default n
104
105config ARCH_HAS_ILOG2_U64
106	bool
107	default n
108
109config GENERIC_HWEIGHT
110	bool
111	default y
112
113config GENERIC_CALIBRATE_DELAY
114	bool
115	default y
116
117config ARCH_MAY_HAVE_PC_FDC
118	bool
119
120config ZONE_DMA
121	bool
122	default y
123
124config GENERIC_ISA_DMA
125	bool
126
127config FIQ
128	bool
129
130config ARCH_MTD_XIP
131	bool
132
133config VECTORS_BASE
134	hex
135	default 0xffff0000 if MMU || CPU_HIGH_VECTOR
136	default DRAM_BASE if REMAP_VECTORS_TO_RAM
137	default 0x00000000
138	help
139	  The base address of exception vectors.
140
141source "init/Kconfig"
142
143menu "System Type"
144
145choice
146	prompt "ARM system type"
147	default ARCH_VERSATILE
148
149config ARCH_AAEC2000
150	bool "Agilent AAEC-2000 based"
151	select ARM_AMBA
152	help
153	  This enables support for systems based on the Agilent AAEC-2000
154
155config ARCH_INTEGRATOR
156	bool "ARM Ltd. Integrator family"
157	select ARM_AMBA
158	select ICST525
159	help
160	  Support for ARM's Integrator platform.
161
162config ARCH_REALVIEW
163	bool "ARM Ltd. RealView family"
164	select ARM_AMBA
165	select ICST307
166	help
167	  This enables support for ARM Ltd RealView boards.
168
169config ARCH_VERSATILE
170	bool "ARM Ltd. Versatile family"
171	select ARM_AMBA
172	select ARM_VIC
173	select ICST307
174	select GENERIC_TIME
175	select GENERIC_CLOCKEVENTS
176	help
177	  This enables support for ARM Ltd Versatile board.
178
179config ARCH_AT91
180	bool "Atmel AT91"
181	select GENERIC_GPIO
182	help
183	  This enables support for systems based on the Atmel AT91RM9200
184	  and AT91SAM9xxx processors.
185
186config ARCH_CLPS7500
187	bool "Cirrus CL-PS7500FE"
188	select TIMER_ACORN
189	select ISA
190	select NO_IOPORT
191	help
192	  Support for the Cirrus Logic PS7500FE system-on-a-chip.
193
194config ARCH_CLPS711X
195	bool "Cirrus Logic CLPS711x/EP721x-based"
196	help
197	  Support for Cirrus Logic 711x/721x based boards.
198
199config ARCH_CO285
200	bool "Co-EBSA285"
201	select FOOTBRIDGE
202	select FOOTBRIDGE_ADDIN
203	help
204	  Support for Intel's EBSA285 companion chip.
205
206config ARCH_EBSA110
207	bool "EBSA-110"
208	select ISA
209	select NO_IOPORT
210	help
211	  This is an evaluation board for the StrongARM processor available
212	  from Digital. It has limited hardware on-board, including an
213	  Ethernet interface, two PCMCIA sockets, two serial ports and a
214	  parallel port.
215
216config ARCH_EP93XX
217	bool "EP93xx-based"
218	select ARM_AMBA
219	select ARM_VIC
220	help
221	  This enables support for the Cirrus EP93xx series of CPUs.
222
223config ARCH_FOOTBRIDGE
224	bool "FootBridge"
225	select FOOTBRIDGE
226	help
227	  Support for systems based on the DC21285 companion chip
228	  ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
229
230config ARCH_NETX
231	bool "Hilscher NetX based"
232	select ARM_VIC
233	help
234	  This enables support for systems based on the Hilscher NetX Soc
235
236config ARCH_H720X
237	bool "Hynix HMS720x-based"
238	select ISA_DMA_API
239	help
240	  This enables support for systems based on the Hynix HMS720x
241
242config ARCH_IMX
243	bool "IMX"
244	help
245	  Support for Motorola's i.MX family of processors (MX1, MXL).
246
247config ARCH_IOP13XX
248	bool "IOP13xx-based"
249	depends on MMU
250	select PLAT_IOP
251	select PCI
252	select ARCH_SUPPORTS_MSI
253	help
254	  Support for Intel's IOP13XX (XScale) family of processors.
255
256config ARCH_IOP32X
257	bool "IOP32x-based"
258	depends on MMU
259	select PLAT_IOP
260	select PCI
261	help
262	  Support for Intel's 80219 and IOP32X (XScale) family of
263	  processors.
264
265config ARCH_IOP33X
266	bool "IOP33x-based"
267	depends on MMU
268	select PLAT_IOP
269	select PCI
270	help
271	  Support for Intel's IOP33X (XScale) family of processors.
272
273config ARCH_IXP23XX
274 	bool "IXP23XX-based"
275	depends on MMU
276 	select PCI
277	help
278	  Support for Intel's IXP23xx (XScale) family of processors.
279
280config ARCH_IXP2000
281	bool "IXP2400/2800-based"
282	depends on MMU
283	select PCI
284	help
285	  Support for Intel's IXP2400/2800 (XScale) family of processors.
286
287config ARCH_IXP4XX
288	bool "IXP4xx-based"
289	depends on MMU
290	select GENERIC_TIME
291	select GENERIC_CLOCKEVENTS
292	help
293	  Support for Intel's IXP4XX (XScale) family of processors.
294
295config ARCH_L7200
296	bool "LinkUp-L7200"
297	select FIQ
298	help
299	  Say Y here if you intend to run this kernel on a LinkUp Systems
300	  L7200 Software Development Board which uses an ARM720T processor.
301	  Information on this board can be obtained at:
302
303	  <http://www.linkupsys.com/>
304
305	  If you have any questions or comments about the Linux kernel port
306	  to this board, send e-mail to <sjhill@cotw.com>.
307
308config ARCH_KS8695
309	bool "Micrel/Kendin KS8695"
310	help
311	  Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
312	  System-on-Chip devices.
313
314config ARCH_NS9XXX
315	bool "NetSilicon NS9xxx"
316	help
317	  Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
318	  System.
319
320	  <http://www.digi.com/products/microprocessors/index.jsp>
321
322config ARCH_PNX4008
323	bool "Philips Nexperia PNX4008 Mobile"
324	help
325	  This enables support for Philips PNX4008 mobile platform.
326
327config ARCH_PXA
328	bool "PXA2xx-based"
329	depends on MMU
330	select ARCH_MTD_XIP
331	select GENERIC_GPIO
332	select GENERIC_TIME
333	help
334	  Support for Intel's PXA2XX processor line.
335
336config ARCH_RPC
337	bool "RiscPC"
338	select ARCH_ACORN
339	select FIQ
340	select TIMER_ACORN
341	select ARCH_MAY_HAVE_PC_FDC
342	select ISA_DMA_API
343	select NO_IOPORT
344	help
345	  On the Acorn Risc-PC, Linux can support the internal IDE disk and
346	  CD-ROM interface, serial and parallel port, and the floppy drive.
347
348config ARCH_SA1100
349	bool "SA1100-based"
350	select ISA
351	select ARCH_DISCONTIGMEM_ENABLE
352	select ARCH_MTD_XIP
353	select GENERIC_GPIO
354	help
355	  Support for StrongARM 11x0 based boards.
356
357config ARCH_S3C2410
358	bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
359	select GENERIC_GPIO
360	help
361	  Samsung S3C2410X CPU based systems, such as the Simtec Electronics
362	  BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
363	  the Samsung SMDK2410 development board (and derivatives).
364
365config ARCH_SHARK
366	bool "Shark"
367	select ISA
368	select ISA_DMA
369	select PCI
370	help
371	  Support for the StrongARM based Digital DNARD machine, also known
372	  as "Shark" (<http://www.shark-linux.de/shark.html>).
373
374config ARCH_LH7A40X
375	bool "Sharp LH7A40X"
376	help
377	  Say Y here for systems based on one of the Sharp LH7A40X
378	  System on a Chip processors.  These CPUs include an ARM922T
379	  core with a wide array of integrated devices for
380	  hand-held and low-power applications.
381
382config ARCH_DAVINCI
383	bool "TI DaVinci"
384	select GENERIC_TIME
385	select GENERIC_CLOCKEVENTS
386	help
387	  Support for TI's DaVinci platform.
388
389config ARCH_OMAP
390	bool "TI OMAP"
391	select GENERIC_GPIO
392	select GENERIC_TIME
393	help
394	  Support for TI's OMAP platform (OMAP1 and OMAP2).
395
396endchoice
397
398source "arch/arm/mach-clps711x/Kconfig"
399
400source "arch/arm/mach-ep93xx/Kconfig"
401
402source "arch/arm/mach-footbridge/Kconfig"
403
404source "arch/arm/mach-integrator/Kconfig"
405
406source "arch/arm/mach-iop32x/Kconfig"
407
408source "arch/arm/mach-iop33x/Kconfig"
409
410source "arch/arm/mach-iop13xx/Kconfig"
411
412source "arch/arm/mach-ixp4xx/Kconfig"
413
414source "arch/arm/mach-ixp2000/Kconfig"
415
416source "arch/arm/mach-ixp23xx/Kconfig"
417
418source "arch/arm/mach-pxa/Kconfig"
419
420source "arch/arm/mach-sa1100/Kconfig"
421
422source "arch/arm/plat-omap/Kconfig"
423
424source "arch/arm/mach-omap1/Kconfig"
425
426source "arch/arm/mach-omap2/Kconfig"
427
428source "arch/arm/plat-s3c24xx/Kconfig"
429
430if ARCH_S3C2410
431source "arch/arm/mach-s3c2400/Kconfig"
432source "arch/arm/mach-s3c2410/Kconfig"
433source "arch/arm/mach-s3c2412/Kconfig"
434source "arch/arm/mach-s3c2440/Kconfig"
435source "arch/arm/mach-s3c2442/Kconfig"
436source "arch/arm/mach-s3c2443/Kconfig"
437endif
438
439source "arch/arm/mach-lh7a40x/Kconfig"
440
441source "arch/arm/mach-imx/Kconfig"
442
443source "arch/arm/mach-h720x/Kconfig"
444
445source "arch/arm/mach-versatile/Kconfig"
446
447source "arch/arm/mach-aaec2000/Kconfig"
448
449source "arch/arm/mach-realview/Kconfig"
450
451source "arch/arm/mach-at91/Kconfig"
452
453source "arch/arm/mach-netx/Kconfig"
454
455source "arch/arm/mach-ns9xxx/Kconfig"
456
457source "arch/arm/mach-davinci/Kconfig"
458
459source "arch/arm/mach-ks8695/Kconfig"
460
461# Definitions to make life easier
462config ARCH_ACORN
463	bool
464
465config PLAT_IOP
466	bool
467
468source arch/arm/mm/Kconfig
469
470config IWMMXT
471	bool "Enable iWMMXt support"
472	depends on CPU_XSCALE || CPU_XSC3
473	default y if PXA27x
474	help
475	  Enable support for iWMMXt context switching at run time if
476	  running on a CPU that supports it.
477
478#  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
479config XSCALE_PMU
480	bool
481	depends on CPU_XSCALE && !XSCALE_PMU_TIMER
482	default y
483
484if !MMU
485source "arch/arm/Kconfig-nommu"
486endif
487
488endmenu
489
490source "arch/arm/common/Kconfig"
491
492config FORCE_MAX_ZONEORDER
493	int
494	depends on SA1111
495	default "9"
496
497menu "Bus support"
498
499config ARM_AMBA
500	bool
501
502config ISA
503	bool
504	help
505	  Find out whether you have ISA slots on your motherboard.  ISA is the
506	  name of a bus system, i.e. the way the CPU talks to the other stuff
507	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
508	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
509	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
510
511# Select ISA DMA controller support
512config ISA_DMA
513	bool
514	select ISA_DMA_API
515
516# Select ISA DMA interface
517config ISA_DMA_API
518	bool
519
520config PCI
521	bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695
522	help
523	  Find out whether you have a PCI motherboard. PCI is the name of a
524	  bus system, i.e. the way the CPU talks to the other stuff inside
525	  your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
526	  VESA. If you have PCI, say Y, otherwise N.
527
528	  The PCI-HOWTO, available from
529	  <http://www.tldp.org/docs.html#howto>, contains valuable
530	  information about which PCI hardware does work under Linux and which
531	  doesn't.
532
533# Select the host bridge type
534config PCI_HOST_VIA82C505
535	bool
536	depends on PCI && ARCH_SHARK
537	default y
538
539source "drivers/pci/Kconfig"
540
541source "drivers/pcmcia/Kconfig"
542
543endmenu
544
545menu "Kernel Features"
546
547source "kernel/time/Kconfig"
548
549config SMP
550	bool "Symmetric Multi-Processing (EXPERIMENTAL)"
551	depends on EXPERIMENTAL && REALVIEW_MPCORE
552	help
553	  This enables support for systems with more than one CPU. If you have
554	  a system with only one CPU, like most personal computers, say N. If
555	  you have a system with more than one CPU, say Y.
556
557	  If you say N here, the kernel will run on single and multiprocessor
558	  machines, but will use only one CPU of a multiprocessor machine. If
559	  you say Y here, the kernel will run on many, but not all, single
560	  processor machines. On a single processor machine, the kernel will
561	  run faster if you say N here.
562
563	  See also the <file:Documentation/smp.txt>,
564	  <file:Documentation/i386/IO-APIC.txt>,
565	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
566	  <http://www.linuxdoc.org/docs.html#howto>.
567
568	  If you don't know what to do here, say N.
569
570config NR_CPUS
571	int "Maximum number of CPUs (2-32)"
572	range 2 32
573	depends on SMP
574	default "4"
575
576config HOTPLUG_CPU
577	bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
578	depends on SMP && HOTPLUG && EXPERIMENTAL
579	help
580	  Say Y here to experiment with turning CPUs off and on.  CPUs
581	  can be controlled through /sys/devices/system/cpu.
582
583config LOCAL_TIMERS
584	bool "Use local timer interrupts"
585	depends on SMP && REALVIEW_MPCORE
586	default y
587	help
588	  Enable support for local timers on SMP platforms, rather then the
589	  legacy IPI broadcast method.  Local timers allows the system
590	  accounting to be spread across the timer interval, preventing a
591	  "thundering herd" at every timer tick.
592
593config PREEMPT
594	bool "Preemptible Kernel (EXPERIMENTAL)"
595	depends on EXPERIMENTAL
596	help
597	  This option reduces the latency of the kernel when reacting to
598	  real-time or interactive events by allowing a low priority process to
599	  be preempted even if it is in kernel mode executing a system call.
600	  This allows applications to run more reliably even when the system is
601	  under load.
602
603	  Say Y here if you are building a kernel for a desktop, embedded
604	  or real-time system.  Say N if you are unsure.
605
606config NO_IDLE_HZ
607	bool "Dynamic tick timer"
608	depends on !GENERIC_CLOCKEVENTS
609	help
610	  Select this option if you want to disable continuous timer ticks
611	  and have them programmed to occur as required. This option saves
612	  power as the system can remain in idle state for longer.
613
614	  By default dynamic tick is disabled during the boot, and can be
615	  manually enabled with:
616
617	    echo 1 > /sys/devices/system/timer/timer0/dyn_tick
618
619	  Alternatively, if you want dynamic tick automatically enabled
620	  during boot, pass "dyntick=enable" via the kernel command string.
621
622	  Please note that dynamic tick may affect the accuracy of
623	  timekeeping on some platforms depending on the implementation.
624	  Currently at least OMAP, PXA2xx and SA11x0 platforms are known
625	  to have accurate timekeeping with dynamic tick.
626
627config HZ
628	int
629	default 128 if ARCH_L7200
630	default 200 if ARCH_EBSA110 || ARCH_S3C2410
631	default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
632	default 100
633
634config AEABI
635	bool "Use the ARM EABI to compile the kernel"
636	help
637	  This option allows for the kernel to be compiled using the latest
638	  ARM ABI (aka EABI).  This is only useful if you are using a user
639	  space environment that is also compiled with EABI.
640
641	  Since there are major incompatibilities between the legacy ABI and
642	  EABI, especially with regard to structure member alignment, this
643	  option also changes the kernel syscall calling convention to
644	  disambiguate both ABIs and allow for backward compatibility support
645	  (selected with CONFIG_OABI_COMPAT).
646
647	  To use this you need GCC version 4.0.0 or later.
648
649config OABI_COMPAT
650	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
651	depends on AEABI && EXPERIMENTAL
652	default y
653	help
654	  This option preserves the old syscall interface along with the
655	  new (ARM EABI) one. It also provides a compatibility layer to
656	  intercept syscalls that have structure arguments which layout
657	  in memory differs between the legacy ABI and the new ARM EABI
658	  (only for non "thumb" binaries). This option adds a tiny
659	  overhead to all syscalls and produces a slightly larger kernel.
660	  If you know you'll be using only pure EABI user space then you
661	  can say N here. If this option is not selected and you attempt
662	  to execute a legacy ABI binary then the result will be
663	  UNPREDICTABLE (in fact it can be predicted that it won't work
664	  at all). If in doubt say Y.
665
666config ARCH_DISCONTIGMEM_ENABLE
667	bool
668	default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
669	help
670	  Say Y to support efficient handling of discontiguous physical memory,
671	  for architectures which are either NUMA (Non-Uniform Memory Access)
672	  or have huge holes in the physical address space for other reasons.
673	  See <file:Documentation/vm/numa> for more.
674
675config NODES_SHIFT
676	int
677	default "4" if ARCH_LH7A40X
678	default "2"
679	depends on NEED_MULTIPLE_NODES
680
681source "mm/Kconfig"
682
683config LEDS
684	bool "Timer and CPU usage LEDs"
685	depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
686		   ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
687		   ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
688		   ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
689		   ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
690		   ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
691		   ARCH_KS8695
692	help
693	  If you say Y here, the LEDs on your machine will be used
694	  to provide useful information about your current system status.
695
696	  If you are compiling a kernel for a NetWinder or EBSA-285, you will
697	  be able to select which LEDs are active using the options below. If
698	  you are compiling a kernel for the EBSA-110 or the LART however, the
699	  red LED will simply flash regularly to indicate that the system is
700	  still functional. It is safe to say Y here if you have a CATS
701	  system, but the driver will do nothing.
702
703config LEDS_TIMER
704	bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
705			    MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
706	depends on LEDS
707	depends on !GENERIC_CLOCKEVENTS
708	default y if ARCH_EBSA110
709	help
710	  If you say Y here, one of the system LEDs (the green one on the
711	  NetWinder, the amber one on the EBSA285, or the red one on the LART)
712	  will flash regularly to indicate that the system is still
713	  operational. This is mainly useful to kernel hackers who are
714	  debugging unstable kernels.
715
716	  The LART uses the same LED for both Timer LED and CPU usage LED
717	  functions. You may choose to use both, but the Timer LED function
718	  will overrule the CPU usage LED.
719
720config LEDS_CPU
721	bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
722			!ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
723	depends on LEDS
724	help
725	  If you say Y here, the red LED will be used to give a good real
726	  time indication of CPU usage, by lighting whenever the idle task
727	  is not currently executing.
728
729	  The LART uses the same LED for both Timer LED and CPU usage LED
730	  functions. You may choose to use both, but the Timer LED function
731	  will overrule the CPU usage LED.
732
733config ALIGNMENT_TRAP
734	bool
735	depends on CPU_CP15_MMU
736	default y if !ARCH_EBSA110
737	help
738	  ARM processors cannot fetch/store information which is not
739	  naturally aligned on the bus, i.e., a 4 byte fetch must start at an
740	  address divisible by 4. On 32-bit ARM processors, these non-aligned
741	  fetch/store instructions will be emulated in software if you say
742	  here, which has a severe performance impact. This is necessary for
743	  correct operation of some network protocols. With an IP-only
744	  configuration it is safe to say N, otherwise say Y.
745
746endmenu
747
748menu "Boot options"
749
750# Compressed boot loader in ROM.  Yes, we really want to ask about
751# TEXT and BSS so we preserve their values in the config files.
752config ZBOOT_ROM_TEXT
753	hex "Compressed ROM boot loader base address"
754	default "0"
755	help
756	  The physical address at which the ROM-able zImage is to be
757	  placed in the target.  Platforms which normally make use of
758	  ROM-able zImage formats normally set this to a suitable
759	  value in their defconfig file.
760
761	  If ZBOOT_ROM is not enabled, this has no effect.
762
763config ZBOOT_ROM_BSS
764	hex "Compressed ROM boot loader BSS address"
765	default "0"
766	help
767	  The base address of an area of read/write memory in the target
768	  for the ROM-able zImage which must be available while the
769	  decompressor is running. It must be large enough to hold the
770	  entire decompressed kernel plus an additional 128 KiB.
771	  Platforms which normally make use of ROM-able zImage formats
772	  normally set this to a suitable value in their defconfig file.
773
774	  If ZBOOT_ROM is not enabled, this has no effect.
775
776config ZBOOT_ROM
777	bool "Compressed boot loader in ROM/flash"
778	depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
779	help
780	  Say Y here if you intend to execute your compressed kernel image
781	  (zImage) directly from ROM or flash.  If unsure, say N.
782
783config CMDLINE
784	string "Default kernel command string"
785	default ""
786	help
787	  On some architectures (EBSA110 and CATS), there is currently no way
788	  for the boot loader to pass arguments to the kernel. For these
789	  architectures, you should supply some command-line options at build
790	  time by entering them here. As a minimum, you should specify the
791	  memory size and the root device (e.g., mem=64M root=/dev/nfs).
792
793config XIP_KERNEL
794	bool "Kernel Execute-In-Place from ROM"
795	depends on !ZBOOT_ROM
796	help
797	  Execute-In-Place allows the kernel to run from non-volatile storage
798	  directly addressable by the CPU, such as NOR flash. This saves RAM
799	  space since the text section of the kernel is not loaded from flash
800	  to RAM.  Read-write sections, such as the data section and stack,
801	  are still copied to RAM.  The XIP kernel is not compressed since
802	  it has to run directly from flash, so it will take more space to
803	  store it.  The flash address used to link the kernel object files,
804	  and for storing it, is configuration dependent. Therefore, if you
805	  say Y here, you must know the proper physical address where to
806	  store the kernel image depending on your own flash memory usage.
807
808	  Also note that the make target becomes "make xipImage" rather than
809	  "make zImage" or "make Image".  The final kernel binary to put in
810	  ROM memory will be arch/arm/boot/xipImage.
811
812	  If unsure, say N.
813
814config XIP_PHYS_ADDR
815	hex "XIP Kernel Physical Location"
816	depends on XIP_KERNEL
817	default "0x00080000"
818	help
819	  This is the physical address in your flash memory the kernel will
820	  be linked for and stored to.  This address is dependent on your
821	  own flash usage.
822
823config KEXEC
824	bool "Kexec system call (EXPERIMENTAL)"
825	depends on EXPERIMENTAL
826	help
827	  kexec is a system call that implements the ability to shutdown your
828	  current kernel, and to start another kernel.  It is like a reboot
829	  but it is indepedent of the system firmware.   And like a reboot
830	  you can start any kernel with it, not just Linux.
831
832	  It is an ongoing process to be certain the hardware in a machine
833	  is properly shutdown, so do not be surprised if this code does not
834	  initially work for you.  It may help to enable device hotplugging
835	  support.
836
837endmenu
838
839if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX )
840
841menu "CPU Frequency scaling"
842
843source "drivers/cpufreq/Kconfig"
844
845config CPU_FREQ_SA1100
846	bool
847	depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
848	default y
849
850config CPU_FREQ_SA1110
851	bool
852	depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
853	default y
854
855config CPU_FREQ_INTEGRATOR
856	tristate "CPUfreq driver for ARM Integrator CPUs"
857	depends on ARCH_INTEGRATOR && CPU_FREQ
858	default y
859	help
860	  This enables the CPUfreq driver for ARM Integrator CPUs.
861
862	  For details, take a look at <file:Documentation/cpu-freq>.
863
864	  If in doubt, say Y.
865
866config CPU_FREQ_IMX
867	tristate "CPUfreq driver for i.MX CPUs"
868	depends on ARCH_IMX && CPU_FREQ
869	default n
870	help
871	  This enables the CPUfreq driver for i.MX CPUs.
872
873	  If in doubt, say N.
874
875endmenu
876
877endif
878
879menu "Floating point emulation"
880
881comment "At least one emulation must be selected"
882
883config FPE_NWFPE
884	bool "NWFPE math emulation"
885	depends on !AEABI || OABI_COMPAT
886	---help---
887	  Say Y to include the NWFPE floating point emulator in the kernel.
888	  This is necessary to run most binaries. Linux does not currently
889	  support floating point hardware so you need to say Y here even if
890	  your machine has an FPA or floating point co-processor podule.
891
892	  You may say N here if you are going to load the Acorn FPEmulator
893	  early in the bootup.
894
895config FPE_NWFPE_XP
896	bool "Support extended precision"
897	depends on FPE_NWFPE
898	help
899	  Say Y to include 80-bit support in the kernel floating-point
900	  emulator.  Otherwise, only 32 and 64-bit support is compiled in.
901	  Note that gcc does not generate 80-bit operations by default,
902	  so in most cases this option only enlarges the size of the
903	  floating point emulator without any good reason.
904
905	  You almost surely want to say N here.
906
907config FPE_FASTFPE
908	bool "FastFPE math emulation (EXPERIMENTAL)"
909	depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
910	---help---
911	  Say Y here to include the FAST floating point emulator in the kernel.
912	  This is an experimental much faster emulator which now also has full
913	  precision for the mantissa.  It does not support any exceptions.
914	  It is very simple, and approximately 3-6 times faster than NWFPE.
915
916	  It should be sufficient for most programs.  It may be not suitable
917	  for scientific calculations, but you have to check this for yourself.
918	  If you do not feel you need a faster FP emulation you should better
919	  choose NWFPE.
920
921config VFP
922	bool "VFP-format floating point maths"
923	depends on CPU_V6 || CPU_ARM926T
924	help
925	  Say Y to include VFP support code in the kernel. This is needed
926	  if your hardware includes a VFP unit.
927
928	  Please see <file:Documentation/arm/VFP/release-notes.txt> for
929	  release notes and additional status information.
930
931	  Say N if your target does not have VFP hardware.
932
933endmenu
934
935menu "Userspace binary formats"
936
937source "fs/Kconfig.binfmt"
938
939config ARTHUR
940	tristate "RISC OS personality"
941	depends on !AEABI
942	help
943	  Say Y here to include the kernel code necessary if you want to run
944	  Acorn RISC OS/Arthur binaries under Linux. This code is still very
945	  experimental; if this sounds frightening, say N and sleep in peace.
946	  You can also say M here to compile this support as a module (which
947	  will be called arthur).
948
949endmenu
950
951menu "Power management options"
952
953source "kernel/power/Kconfig"
954
955endmenu
956
957source "net/Kconfig"
958
959menu "Device Drivers"
960
961source "drivers/base/Kconfig"
962
963source "drivers/connector/Kconfig"
964
965if ALIGNMENT_TRAP || !CPU_CP15_MMU
966source "drivers/mtd/Kconfig"
967endif
968
969source "drivers/parport/Kconfig"
970
971source "drivers/pnp/Kconfig"
972
973source "drivers/block/Kconfig"
974
975source "drivers/acorn/block/Kconfig"
976
977if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
978	|| ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
979	|| ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
980	|| ARCH_IXP23XX
981source "drivers/ide/Kconfig"
982endif
983
984source "drivers/scsi/Kconfig"
985
986source "drivers/ata/Kconfig"
987
988source "drivers/md/Kconfig"
989
990source "drivers/message/fusion/Kconfig"
991
992source "drivers/ieee1394/Kconfig"
993
994source "drivers/message/i2o/Kconfig"
995
996source "drivers/net/Kconfig"
997
998source "drivers/isdn/Kconfig"
999
1000# input before char - char/joystick depends on it. As does USB.
1001
1002source "drivers/input/Kconfig"
1003
1004source "drivers/char/Kconfig"
1005
1006source "drivers/i2c/Kconfig"
1007
1008source "drivers/spi/Kconfig"
1009
1010source "drivers/w1/Kconfig"
1011
1012source "drivers/hwmon/Kconfig"
1013
1014#source "drivers/l3/Kconfig"
1015
1016source "drivers/misc/Kconfig"
1017
1018source "drivers/mfd/Kconfig"
1019
1020source "drivers/leds/Kconfig"
1021
1022source "drivers/media/Kconfig"
1023
1024source "drivers/video/Kconfig"
1025
1026source "sound/Kconfig"
1027
1028source "drivers/hid/Kconfig"
1029
1030source "drivers/usb/Kconfig"
1031
1032source "drivers/mmc/Kconfig"
1033
1034source "drivers/rtc/Kconfig"
1035
1036endmenu
1037
1038source "fs/Kconfig"
1039
1040source "arch/arm/oprofile/Kconfig"
1041
1042source "arch/arm/Kconfig.debug"
1043
1044source "security/Kconfig"
1045
1046source "crypto/Kconfig"
1047
1048source "lib/Kconfig"
1049