[ARM] 5487/1: ARM errata: Stale prediction on replaced interworking branch
[deliverable/linux.git] / arch / arm / Kconfig
1 #
2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
4 #
5
6 mainmenu "Linux Kernel Configuration"
7
8 config ARM
9 bool
10 default y
11 select HAVE_AOUT
12 select HAVE_IDE
13 select RTC_LIB
14 select SYS_SUPPORTS_APM_EMULATION
15 select HAVE_OPROFILE
16 select HAVE_ARCH_KGDB
17 select HAVE_KPROBES if (!XIP_KERNEL)
18 select HAVE_KRETPROBES if (HAVE_KPROBES)
19 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
20 select HAVE_GENERIC_DMA_COHERENT
21 help
22 The ARM series is a line of low-power-consumption RISC chip designs
23 licensed by ARM Ltd and targeted at embedded applications and
24 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
25 manufactured, but legacy ARM-based PC hardware remains popular in
26 Europe. There is an ARM Linux project with a web page at
27 <http://www.arm.linux.org.uk/>.
28
29 config HAVE_PWM
30 bool
31
32 config SYS_SUPPORTS_APM_EMULATION
33 bool
34
35 config GENERIC_GPIO
36 bool
37 default n
38
39 config GENERIC_TIME
40 bool
41 default n
42
43 config GENERIC_CLOCKEVENTS
44 bool
45 default n
46
47 config GENERIC_CLOCKEVENTS_BROADCAST
48 bool
49 depends on GENERIC_CLOCKEVENTS
50 default y if SMP && !LOCAL_TIMERS
51
52 config MMU
53 bool
54 default y
55
56 config NO_IOPORT
57 bool
58 default n
59
60 config EISA
61 bool
62 ---help---
63 The Extended Industry Standard Architecture (EISA) bus was
64 developed as an open alternative to the IBM MicroChannel bus.
65
66 The EISA bus provided some of the features of the IBM MicroChannel
67 bus while maintaining backward compatibility with cards made for
68 the older ISA bus. The EISA bus saw limited use between 1988 and
69 1995 when it was made obsolete by the PCI bus.
70
71 Say Y here if you are building a kernel for an EISA-based machine.
72
73 Otherwise, say N.
74
75 config SBUS
76 bool
77
78 config MCA
79 bool
80 help
81 MicroChannel Architecture is found in some IBM PS/2 machines and
82 laptops. It is a bus system similar to PCI or ISA. See
83 <file:Documentation/mca.txt> (and especially the web page given
84 there) before attempting to build an MCA bus kernel.
85
86 config GENERIC_HARDIRQS
87 bool
88 default y
89
90 config STACKTRACE_SUPPORT
91 bool
92 default y
93
94 config HAVE_LATENCYTOP_SUPPORT
95 bool
96 depends on !SMP
97 default y
98
99 config LOCKDEP_SUPPORT
100 bool
101 default y
102
103 config TRACE_IRQFLAGS_SUPPORT
104 bool
105 default y
106
107 config HARDIRQS_SW_RESEND
108 bool
109 default y
110
111 config GENERIC_IRQ_PROBE
112 bool
113 default y
114
115 config GENERIC_LOCKBREAK
116 bool
117 default y
118 depends on SMP && PREEMPT
119
120 config RWSEM_GENERIC_SPINLOCK
121 bool
122 default y
123
124 config RWSEM_XCHGADD_ALGORITHM
125 bool
126
127 config ARCH_HAS_ILOG2_U32
128 bool
129 default n
130
131 config ARCH_HAS_ILOG2_U64
132 bool
133 default n
134
135 config GENERIC_HWEIGHT
136 bool
137 default y
138
139 config GENERIC_CALIBRATE_DELAY
140 bool
141 default y
142
143 config ARCH_MAY_HAVE_PC_FDC
144 bool
145
146 config ZONE_DMA
147 bool
148
149 config GENERIC_ISA_DMA
150 bool
151
152 config FIQ
153 bool
154
155 config ARCH_MTD_XIP
156 bool
157
158 config GENERIC_HARDIRQS_NO__DO_IRQ
159 def_bool y
160
161 if OPROFILE
162
163 config OPROFILE_ARMV6
164 def_bool y
165 depends on CPU_V6 && !SMP
166 select OPROFILE_ARM11_CORE
167
168 config OPROFILE_MPCORE
169 def_bool y
170 depends on CPU_V6 && SMP
171 select OPROFILE_ARM11_CORE
172
173 config OPROFILE_ARM11_CORE
174 bool
175
176 config OPROFILE_ARMV7
177 def_bool y
178 depends on CPU_V7 && !SMP
179 bool
180
181 endif
182
183 config VECTORS_BASE
184 hex
185 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
186 default DRAM_BASE if REMAP_VECTORS_TO_RAM
187 default 0x00000000
188 help
189 The base address of exception vectors.
190
191 source "init/Kconfig"
192
193 source "kernel/Kconfig.freezer"
194
195 menu "System Type"
196
197 choice
198 prompt "ARM system type"
199 default ARCH_VERSATILE
200
201 config ARCH_AAEC2000
202 bool "Agilent AAEC-2000 based"
203 select CPU_ARM920T
204 select ARM_AMBA
205 select HAVE_CLK
206 help
207 This enables support for systems based on the Agilent AAEC-2000
208
209 config ARCH_INTEGRATOR
210 bool "ARM Ltd. Integrator family"
211 select ARM_AMBA
212 select HAVE_CLK
213 select COMMON_CLKDEV
214 select ICST525
215 help
216 Support for ARM's Integrator platform.
217
218 config ARCH_REALVIEW
219 bool "ARM Ltd. RealView family"
220 select ARM_AMBA
221 select HAVE_CLK
222 select COMMON_CLKDEV
223 select ICST307
224 select GENERIC_TIME
225 select GENERIC_CLOCKEVENTS
226 help
227 This enables support for ARM Ltd RealView boards.
228
229 config ARCH_VERSATILE
230 bool "ARM Ltd. Versatile family"
231 select ARM_AMBA
232 select ARM_VIC
233 select HAVE_CLK
234 select COMMON_CLKDEV
235 select ICST307
236 select GENERIC_TIME
237 select GENERIC_CLOCKEVENTS
238 help
239 This enables support for ARM Ltd Versatile board.
240
241 config ARCH_AT91
242 bool "Atmel AT91"
243 select GENERIC_GPIO
244 select ARCH_REQUIRE_GPIOLIB
245 select HAVE_CLK
246 help
247 This enables support for systems based on the Atmel AT91RM9200,
248 AT91SAM9 and AT91CAP9 processors.
249
250 config ARCH_CLPS711X
251 bool "Cirrus Logic CLPS711x/EP721x-based"
252 select CPU_ARM720T
253 help
254 Support for Cirrus Logic 711x/721x based boards.
255
256 config ARCH_EBSA110
257 bool "EBSA-110"
258 select CPU_SA110
259 select ISA
260 select NO_IOPORT
261 help
262 This is an evaluation board for the StrongARM processor available
263 from Digital. It has limited hardware on-board, including an
264 Ethernet interface, two PCMCIA sockets, two serial ports and a
265 parallel port.
266
267 config ARCH_EP93XX
268 bool "EP93xx-based"
269 select CPU_ARM920T
270 select ARM_AMBA
271 select ARM_VIC
272 select GENERIC_GPIO
273 select HAVE_CLK
274 select COMMON_CLKDEV
275 select ARCH_REQUIRE_GPIOLIB
276 help
277 This enables support for the Cirrus EP93xx series of CPUs.
278
279 config ARCH_GEMINI
280 bool "Cortina Systems Gemini"
281 select CPU_FA526
282 select GENERIC_GPIO
283 select ARCH_REQUIRE_GPIOLIB
284 help
285 Support for the Cortina Systems Gemini family SoCs
286
287 config ARCH_FOOTBRIDGE
288 bool "FootBridge"
289 select CPU_SA110
290 select FOOTBRIDGE
291 help
292 Support for systems based on the DC21285 companion chip
293 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
294
295 config ARCH_NETX
296 bool "Hilscher NetX based"
297 select CPU_ARM926T
298 select ARM_VIC
299 select GENERIC_CLOCKEVENTS
300 select GENERIC_TIME
301 help
302 This enables support for systems based on the Hilscher NetX Soc
303
304 config ARCH_H720X
305 bool "Hynix HMS720x-based"
306 select CPU_ARM720T
307 select ISA_DMA_API
308 help
309 This enables support for systems based on the Hynix HMS720x
310
311 config ARCH_IMX
312 bool "IMX"
313 select CPU_ARM920T
314 select GENERIC_GPIO
315 select GENERIC_TIME
316 select GENERIC_CLOCKEVENTS
317 help
318 Support for Motorola's i.MX family of processors (MX1, MXL).
319
320 config ARCH_IOP13XX
321 bool "IOP13xx-based"
322 depends on MMU
323 select CPU_XSC3
324 select PLAT_IOP
325 select PCI
326 select ARCH_SUPPORTS_MSI
327 select VMSPLIT_1G
328 help
329 Support for Intel's IOP13XX (XScale) family of processors.
330
331 config ARCH_IOP32X
332 bool "IOP32x-based"
333 depends on MMU
334 select CPU_XSCALE
335 select PLAT_IOP
336 select PCI
337 select GENERIC_GPIO
338 select ARCH_REQUIRE_GPIOLIB
339 help
340 Support for Intel's 80219 and IOP32X (XScale) family of
341 processors.
342
343 config ARCH_IOP33X
344 bool "IOP33x-based"
345 depends on MMU
346 select CPU_XSCALE
347 select PLAT_IOP
348 select PCI
349 select GENERIC_GPIO
350 select ARCH_REQUIRE_GPIOLIB
351 help
352 Support for Intel's IOP33X (XScale) family of processors.
353
354 config ARCH_IXP23XX
355 bool "IXP23XX-based"
356 depends on MMU
357 select CPU_XSC3
358 select PCI
359 help
360 Support for Intel's IXP23xx (XScale) family of processors.
361
362 config ARCH_IXP2000
363 bool "IXP2400/2800-based"
364 depends on MMU
365 select CPU_XSCALE
366 select PCI
367 help
368 Support for Intel's IXP2400/2800 (XScale) family of processors.
369
370 config ARCH_IXP4XX
371 bool "IXP4xx-based"
372 depends on MMU
373 select CPU_XSCALE
374 select GENERIC_GPIO
375 select GENERIC_TIME
376 select GENERIC_CLOCKEVENTS
377 select DMABOUNCE if PCI
378 help
379 Support for Intel's IXP4XX (XScale) family of processors.
380
381 config ARCH_L7200
382 bool "LinkUp-L7200"
383 select CPU_ARM720T
384 select FIQ
385 help
386 Say Y here if you intend to run this kernel on a LinkUp Systems
387 L7200 Software Development Board which uses an ARM720T processor.
388 Information on this board can be obtained at:
389
390 <http://www.linkupsys.com/>
391
392 If you have any questions or comments about the Linux kernel port
393 to this board, send e-mail to <sjhill@cotw.com>.
394
395 config ARCH_KIRKWOOD
396 bool "Marvell Kirkwood"
397 select CPU_FEROCEON
398 select PCI
399 select GENERIC_GPIO
400 select GENERIC_TIME
401 select GENERIC_CLOCKEVENTS
402 select PLAT_ORION
403 help
404 Support for the following Marvell Kirkwood series SoCs:
405 88F6180, 88F6192 and 88F6281.
406
407 config ARCH_KS8695
408 bool "Micrel/Kendin KS8695"
409 select CPU_ARM922T
410 select GENERIC_GPIO
411 select ARCH_REQUIRE_GPIOLIB
412 help
413 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
414 System-on-Chip devices.
415
416 config ARCH_NS9XXX
417 bool "NetSilicon NS9xxx"
418 select CPU_ARM926T
419 select GENERIC_GPIO
420 select GENERIC_TIME
421 select GENERIC_CLOCKEVENTS
422 select HAVE_CLK
423 help
424 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
425 System.
426
427 <http://www.digi.com/products/microprocessors/index.jsp>
428
429 config ARCH_LOKI
430 bool "Marvell Loki (88RC8480)"
431 select CPU_FEROCEON
432 select GENERIC_TIME
433 select GENERIC_CLOCKEVENTS
434 select PLAT_ORION
435 help
436 Support for the Marvell Loki (88RC8480) SoC.
437
438 config ARCH_MV78XX0
439 bool "Marvell MV78xx0"
440 select CPU_FEROCEON
441 select PCI
442 select GENERIC_GPIO
443 select GENERIC_TIME
444 select GENERIC_CLOCKEVENTS
445 select PLAT_ORION
446 help
447 Support for the following Marvell MV78xx0 series SoCs:
448 MV781x0, MV782x0.
449
450 config ARCH_MXC
451 bool "Freescale MXC/iMX-based"
452 select GENERIC_TIME
453 select GENERIC_CLOCKEVENTS
454 select ARCH_MTD_XIP
455 select GENERIC_GPIO
456 select ARCH_REQUIRE_GPIOLIB
457 help
458 Support for Freescale MXC/iMX-based family of processors
459
460 config ARCH_ORION5X
461 bool "Marvell Orion"
462 depends on MMU
463 select CPU_FEROCEON
464 select PCI
465 select GENERIC_GPIO
466 select GENERIC_TIME
467 select GENERIC_CLOCKEVENTS
468 select PLAT_ORION
469 help
470 Support for the following Marvell Orion 5x series SoCs:
471 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
472 Orion-2 (5281), Orion-1-90 (6183).
473
474 config ARCH_PNX4008
475 bool "Philips Nexperia PNX4008 Mobile"
476 select CPU_ARM926T
477 select HAVE_CLK
478 help
479 This enables support for Philips PNX4008 mobile platform.
480
481 config ARCH_PXA
482 bool "PXA2xx/PXA3xx-based"
483 depends on MMU
484 select ARCH_MTD_XIP
485 select GENERIC_GPIO
486 select HAVE_CLK
487 select COMMON_CLKDEV
488 select ARCH_REQUIRE_GPIOLIB
489 select GENERIC_TIME
490 select GENERIC_CLOCKEVENTS
491 select TICK_ONESHOT
492 select PLAT_PXA
493 help
494 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
495
496 config ARCH_MMP
497 bool "Marvell PXA168/910"
498 depends on MMU
499 select GENERIC_GPIO
500 select ARCH_REQUIRE_GPIOLIB
501 select HAVE_CLK
502 select COMMON_CLKDEV
503 select GENERIC_TIME
504 select GENERIC_CLOCKEVENTS
505 select TICK_ONESHOT
506 select PLAT_PXA
507 help
508 Support for Marvell's PXA168/910 processor line.
509
510 config ARCH_RPC
511 bool "RiscPC"
512 select ARCH_ACORN
513 select FIQ
514 select TIMER_ACORN
515 select ARCH_MAY_HAVE_PC_FDC
516 select HAVE_PATA_PLATFORM
517 select ISA_DMA_API
518 select NO_IOPORT
519 select ARCH_SPARSEMEM_ENABLE
520 help
521 On the Acorn Risc-PC, Linux can support the internal IDE disk and
522 CD-ROM interface, serial and parallel port, and the floppy drive.
523
524 config ARCH_SA1100
525 bool "SA1100-based"
526 select CPU_SA1100
527 select ISA
528 select ARCH_SPARSEMEM_ENABLE
529 select ARCH_MTD_XIP
530 select GENERIC_GPIO
531 select GENERIC_TIME
532 select GENERIC_CLOCKEVENTS
533 select HAVE_CLK
534 select TICK_ONESHOT
535 select ARCH_REQUIRE_GPIOLIB
536 help
537 Support for StrongARM 11x0 based boards.
538
539 config ARCH_S3C2410
540 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
541 select GENERIC_GPIO
542 select HAVE_CLK
543 help
544 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
545 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
546 the Samsung SMDK2410 development board (and derivatives).
547
548 config ARCH_S3C64XX
549 bool "Samsung S3C64XX"
550 select GENERIC_GPIO
551 select HAVE_CLK
552 help
553 Samsung S3C64XX series based systems
554
555 config ARCH_SHARK
556 bool "Shark"
557 select CPU_SA110
558 select ISA
559 select ISA_DMA
560 select ZONE_DMA
561 select PCI
562 help
563 Support for the StrongARM based Digital DNARD machine, also known
564 as "Shark" (<http://www.shark-linux.de/shark.html>).
565
566 config ARCH_LH7A40X
567 bool "Sharp LH7A40X"
568 select CPU_ARM922T
569 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
570 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
571 help
572 Say Y here for systems based on one of the Sharp LH7A40X
573 System on a Chip processors. These CPUs include an ARM922T
574 core with a wide array of integrated devices for
575 hand-held and low-power applications.
576
577 config ARCH_DAVINCI
578 bool "TI DaVinci"
579 select CPU_ARM926T
580 select GENERIC_TIME
581 select GENERIC_CLOCKEVENTS
582 select GENERIC_GPIO
583 select ARCH_REQUIRE_GPIOLIB
584 select HAVE_CLK
585 select ZONE_DMA
586 select HAVE_IDE
587 select COMMON_CLKDEV
588 help
589 Support for TI's DaVinci platform.
590
591 config ARCH_OMAP
592 bool "TI OMAP"
593 select GENERIC_GPIO
594 select HAVE_CLK
595 select ARCH_REQUIRE_GPIOLIB
596 select GENERIC_TIME
597 select GENERIC_CLOCKEVENTS
598 help
599 Support for TI's OMAP platform (OMAP1 and OMAP2).
600
601 config ARCH_MSM
602 bool "Qualcomm MSM"
603 select CPU_V6
604 select GENERIC_TIME
605 select GENERIC_CLOCKEVENTS
606 help
607 Support for Qualcomm MSM7K based systems. This runs on the ARM11
608 apps processor of the MSM7K and depends on a shared memory
609 interface to the ARM9 modem processor which runs the baseband stack
610 and controls some vital subsystems (clock and power control, etc).
611
612 config ARCH_W90X900
613 bool "Nuvoton W90X900 CPU"
614 select CPU_ARM926T
615 help
616 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
617 can login www.mcuos.com or www.nuvoton.com to know more.
618
619 endchoice
620
621 source "arch/arm/mach-clps711x/Kconfig"
622
623 source "arch/arm/mach-ep93xx/Kconfig"
624
625 source "arch/arm/mach-footbridge/Kconfig"
626
627 source "arch/arm/mach-gemini/Kconfig"
628
629 source "arch/arm/mach-integrator/Kconfig"
630
631 source "arch/arm/mach-iop32x/Kconfig"
632
633 source "arch/arm/mach-iop33x/Kconfig"
634
635 source "arch/arm/mach-iop13xx/Kconfig"
636
637 source "arch/arm/mach-ixp4xx/Kconfig"
638
639 source "arch/arm/mach-ixp2000/Kconfig"
640
641 source "arch/arm/mach-ixp23xx/Kconfig"
642
643 source "arch/arm/mach-loki/Kconfig"
644
645 source "arch/arm/mach-mv78xx0/Kconfig"
646
647 source "arch/arm/mach-pxa/Kconfig"
648 source "arch/arm/plat-pxa/Kconfig"
649
650 source "arch/arm/mach-mmp/Kconfig"
651
652 source "arch/arm/mach-sa1100/Kconfig"
653
654 source "arch/arm/plat-omap/Kconfig"
655
656 source "arch/arm/mach-omap1/Kconfig"
657
658 source "arch/arm/mach-omap2/Kconfig"
659
660 source "arch/arm/mach-orion5x/Kconfig"
661
662 source "arch/arm/mach-kirkwood/Kconfig"
663
664 source "arch/arm/plat-s3c24xx/Kconfig"
665 source "arch/arm/plat-s3c64xx/Kconfig"
666 source "arch/arm/plat-s3c/Kconfig"
667
668 if ARCH_S3C2410
669 source "arch/arm/mach-s3c2400/Kconfig"
670 source "arch/arm/mach-s3c2410/Kconfig"
671 source "arch/arm/mach-s3c2412/Kconfig"
672 source "arch/arm/mach-s3c2440/Kconfig"
673 source "arch/arm/mach-s3c2442/Kconfig"
674 source "arch/arm/mach-s3c2443/Kconfig"
675 endif
676
677 if ARCH_S3C64XX
678 source "arch/arm/mach-s3c6400/Kconfig"
679 source "arch/arm/mach-s3c6410/Kconfig"
680 endif
681
682 source "arch/arm/mach-lh7a40x/Kconfig"
683
684 source "arch/arm/mach-imx/Kconfig"
685
686 source "arch/arm/mach-h720x/Kconfig"
687
688 source "arch/arm/mach-versatile/Kconfig"
689
690 source "arch/arm/mach-aaec2000/Kconfig"
691
692 source "arch/arm/mach-realview/Kconfig"
693
694 source "arch/arm/mach-at91/Kconfig"
695
696 source "arch/arm/plat-mxc/Kconfig"
697
698 source "arch/arm/mach-netx/Kconfig"
699
700 source "arch/arm/mach-ns9xxx/Kconfig"
701
702 source "arch/arm/mach-davinci/Kconfig"
703
704 source "arch/arm/mach-ks8695/Kconfig"
705
706 source "arch/arm/mach-msm/Kconfig"
707
708 source "arch/arm/mach-w90x900/Kconfig"
709
710 # Definitions to make life easier
711 config ARCH_ACORN
712 bool
713
714 config PLAT_IOP
715 bool
716
717 config PLAT_ORION
718 bool
719
720 config PLAT_PXA
721 bool
722
723 source arch/arm/mm/Kconfig
724
725 config IWMMXT
726 bool "Enable iWMMXt support"
727 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
728 default y if PXA27x || PXA3xx || ARCH_MMP
729 help
730 Enable support for iWMMXt context switching at run time if
731 running on a CPU that supports it.
732
733 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
734 config XSCALE_PMU
735 bool
736 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
737 default y
738
739 if !MMU
740 source "arch/arm/Kconfig-nommu"
741 endif
742
743 config ARM_ERRATA_411920
744 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
745 depends on CPU_V6 && !SMP
746 help
747 Invalidation of the Instruction Cache operation can
748 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
749 It does not affect the MPCore. This option enables the ARM Ltd.
750 recommended workaround.
751
752 config ARM_ERRATA_430973
753 bool "ARM errata: Stale prediction on replaced interworking branch"
754 depends on CPU_V7
755 help
756 This option enables the workaround for the 430973 Cortex-A8
757 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
758 interworking branch is replaced with another code sequence at the
759 same virtual address, whether due to self-modifying code or virtual
760 to physical address re-mapping, Cortex-A8 does not recover from the
761 stale interworking branch prediction. This results in Cortex-A8
762 executing the new code sequence in the incorrect ARM or Thumb state.
763 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
764 and also flushes the branch target cache at every context switch.
765 Note that setting specific bits in the ACTLR register may not be
766 available in non-secure mode.
767
768 endmenu
769
770 source "arch/arm/common/Kconfig"
771
772 config FORCE_MAX_ZONEORDER
773 int
774 depends on SA1111
775 default "9"
776
777 menu "Bus support"
778
779 config ARM_AMBA
780 bool
781
782 config ISA
783 bool
784 help
785 Find out whether you have ISA slots on your motherboard. ISA is the
786 name of a bus system, i.e. the way the CPU talks to the other stuff
787 inside your box. Other bus systems are PCI, EISA, MicroChannel
788 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
789 newer boards don't support it. If you have ISA, say Y, otherwise N.
790
791 # Select ISA DMA controller support
792 config ISA_DMA
793 bool
794 select ISA_DMA_API
795
796 # Select ISA DMA interface
797 config ISA_DMA_API
798 bool
799
800 config PCI
801 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
802 help
803 Find out whether you have a PCI motherboard. PCI is the name of a
804 bus system, i.e. the way the CPU talks to the other stuff inside
805 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
806 VESA. If you have PCI, say Y, otherwise N.
807
808 config PCI_SYSCALL
809 def_bool PCI
810
811 # Select the host bridge type
812 config PCI_HOST_VIA82C505
813 bool
814 depends on PCI && ARCH_SHARK
815 default y
816
817 config PCI_HOST_ITE8152
818 bool
819 depends on PCI && MACH_ARMCORE
820 default y
821 select DMABOUNCE
822
823 source "drivers/pci/Kconfig"
824
825 source "drivers/pcmcia/Kconfig"
826
827 endmenu
828
829 menu "Kernel Features"
830
831 source "kernel/time/Kconfig"
832
833 config SMP
834 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
835 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
836 select USE_GENERIC_SMP_HELPERS
837 help
838 This enables support for systems with more than one CPU. If you have
839 a system with only one CPU, like most personal computers, say N. If
840 you have a system with more than one CPU, say Y.
841
842 If you say N here, the kernel will run on single and multiprocessor
843 machines, but will use only one CPU of a multiprocessor machine. If
844 you say Y here, the kernel will run on many, but not all, single
845 processor machines. On a single processor machine, the kernel will
846 run faster if you say N here.
847
848 See also <file:Documentation/i386/IO-APIC.txt>,
849 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
850 <http://www.linuxdoc.org/docs.html#howto>.
851
852 If you don't know what to do here, say N.
853
854 choice
855 prompt "Memory split"
856 default VMSPLIT_3G
857 help
858 Select the desired split between kernel and user memory.
859
860 If you are not absolutely sure what you are doing, leave this
861 option alone!
862
863 config VMSPLIT_3G
864 bool "3G/1G user/kernel split"
865 config VMSPLIT_2G
866 bool "2G/2G user/kernel split"
867 config VMSPLIT_1G
868 bool "1G/3G user/kernel split"
869 endchoice
870
871 config PAGE_OFFSET
872 hex
873 default 0x40000000 if VMSPLIT_1G
874 default 0x80000000 if VMSPLIT_2G
875 default 0xC0000000
876
877 config NR_CPUS
878 int "Maximum number of CPUs (2-32)"
879 range 2 32
880 depends on SMP
881 default "4"
882
883 config HOTPLUG_CPU
884 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
885 depends on SMP && HOTPLUG && EXPERIMENTAL
886 help
887 Say Y here to experiment with turning CPUs off and on. CPUs
888 can be controlled through /sys/devices/system/cpu.
889
890 config LOCAL_TIMERS
891 bool "Use local timer interrupts"
892 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
893 default y
894 help
895 Enable support for local timers on SMP platforms, rather then the
896 legacy IPI broadcast method. Local timers allows the system
897 accounting to be spread across the timer interval, preventing a
898 "thundering herd" at every timer tick.
899
900 config PREEMPT
901 bool "Preemptible Kernel (EXPERIMENTAL)"
902 depends on EXPERIMENTAL
903 help
904 This option reduces the latency of the kernel when reacting to
905 real-time or interactive events by allowing a low priority process to
906 be preempted even if it is in kernel mode executing a system call.
907 This allows applications to run more reliably even when the system is
908 under load.
909
910 Say Y here if you are building a kernel for a desktop, embedded
911 or real-time system. Say N if you are unsure.
912
913 config HZ
914 int
915 default 128 if ARCH_L7200
916 default 200 if ARCH_EBSA110 || ARCH_S3C2410
917 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
918 default AT91_TIMER_HZ if ARCH_AT91
919 default 100
920
921 config AEABI
922 bool "Use the ARM EABI to compile the kernel"
923 help
924 This option allows for the kernel to be compiled using the latest
925 ARM ABI (aka EABI). This is only useful if you are using a user
926 space environment that is also compiled with EABI.
927
928 Since there are major incompatibilities between the legacy ABI and
929 EABI, especially with regard to structure member alignment, this
930 option also changes the kernel syscall calling convention to
931 disambiguate both ABIs and allow for backward compatibility support
932 (selected with CONFIG_OABI_COMPAT).
933
934 To use this you need GCC version 4.0.0 or later.
935
936 config OABI_COMPAT
937 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
938 depends on AEABI && EXPERIMENTAL
939 default y
940 help
941 This option preserves the old syscall interface along with the
942 new (ARM EABI) one. It also provides a compatibility layer to
943 intercept syscalls that have structure arguments which layout
944 in memory differs between the legacy ABI and the new ARM EABI
945 (only for non "thumb" binaries). This option adds a tiny
946 overhead to all syscalls and produces a slightly larger kernel.
947 If you know you'll be using only pure EABI user space then you
948 can say N here. If this option is not selected and you attempt
949 to execute a legacy ABI binary then the result will be
950 UNPREDICTABLE (in fact it can be predicted that it won't work
951 at all). If in doubt say Y.
952
953 config ARCH_FLATMEM_HAS_HOLES
954 bool
955 default y
956 depends on FLATMEM
957
958 # Discontigmem is deprecated
959 config ARCH_DISCONTIGMEM_ENABLE
960 bool
961
962 config ARCH_SPARSEMEM_ENABLE
963 bool
964
965 config ARCH_SPARSEMEM_DEFAULT
966 def_bool ARCH_SPARSEMEM_ENABLE
967
968 config ARCH_SELECT_MEMORY_MODEL
969 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
970
971 config NODES_SHIFT
972 int
973 default "4" if ARCH_LH7A40X
974 default "2"
975 depends on NEED_MULTIPLE_NODES
976
977 config HIGHMEM
978 bool "High Memory Support (EXPERIMENTAL)"
979 depends on MMU && EXPERIMENTAL
980 help
981 The address space of ARM processors is only 4 Gigabytes large
982 and it has to accommodate user address space, kernel address
983 space as well as some memory mapped IO. That means that, if you
984 have a large amount of physical memory and/or IO, not all of the
985 memory can be "permanently mapped" by the kernel. The physical
986 memory that is not permanently mapped is called "high memory".
987
988 Depending on the selected kernel/user memory split, minimum
989 vmalloc space and actual amount of RAM, you may not need this
990 option which should result in a slightly faster kernel.
991
992 If unsure, say n.
993
994 source "mm/Kconfig"
995
996 config LEDS
997 bool "Timer and CPU usage LEDs"
998 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
999 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
1000 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1001 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1002 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1003 ARCH_AT91 || ARCH_DAVINCI || \
1004 ARCH_KS8695 || MACH_RD88F5182
1005 help
1006 If you say Y here, the LEDs on your machine will be used
1007 to provide useful information about your current system status.
1008
1009 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1010 be able to select which LEDs are active using the options below. If
1011 you are compiling a kernel for the EBSA-110 or the LART however, the
1012 red LED will simply flash regularly to indicate that the system is
1013 still functional. It is safe to say Y here if you have a CATS
1014 system, but the driver will do nothing.
1015
1016 config LEDS_TIMER
1017 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1018 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1019 || MACH_OMAP_PERSEUS2
1020 depends on LEDS
1021 depends on !GENERIC_CLOCKEVENTS
1022 default y if ARCH_EBSA110
1023 help
1024 If you say Y here, one of the system LEDs (the green one on the
1025 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1026 will flash regularly to indicate that the system is still
1027 operational. This is mainly useful to kernel hackers who are
1028 debugging unstable kernels.
1029
1030 The LART uses the same LED for both Timer LED and CPU usage LED
1031 functions. You may choose to use both, but the Timer LED function
1032 will overrule the CPU usage LED.
1033
1034 config LEDS_CPU
1035 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1036 !ARCH_OMAP) \
1037 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1038 || MACH_OMAP_PERSEUS2
1039 depends on LEDS
1040 help
1041 If you say Y here, the red LED will be used to give a good real
1042 time indication of CPU usage, by lighting whenever the idle task
1043 is not currently executing.
1044
1045 The LART uses the same LED for both Timer LED and CPU usage LED
1046 functions. You may choose to use both, but the Timer LED function
1047 will overrule the CPU usage LED.
1048
1049 config ALIGNMENT_TRAP
1050 bool
1051 depends on CPU_CP15_MMU
1052 default y if !ARCH_EBSA110
1053 help
1054 ARM processors cannot fetch/store information which is not
1055 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1056 address divisible by 4. On 32-bit ARM processors, these non-aligned
1057 fetch/store instructions will be emulated in software if you say
1058 here, which has a severe performance impact. This is necessary for
1059 correct operation of some network protocols. With an IP-only
1060 configuration it is safe to say N, otherwise say Y.
1061
1062 endmenu
1063
1064 menu "Boot options"
1065
1066 # Compressed boot loader in ROM. Yes, we really want to ask about
1067 # TEXT and BSS so we preserve their values in the config files.
1068 config ZBOOT_ROM_TEXT
1069 hex "Compressed ROM boot loader base address"
1070 default "0"
1071 help
1072 The physical address at which the ROM-able zImage is to be
1073 placed in the target. Platforms which normally make use of
1074 ROM-able zImage formats normally set this to a suitable
1075 value in their defconfig file.
1076
1077 If ZBOOT_ROM is not enabled, this has no effect.
1078
1079 config ZBOOT_ROM_BSS
1080 hex "Compressed ROM boot loader BSS address"
1081 default "0"
1082 help
1083 The base address of an area of read/write memory in the target
1084 for the ROM-able zImage which must be available while the
1085 decompressor is running. It must be large enough to hold the
1086 entire decompressed kernel plus an additional 128 KiB.
1087 Platforms which normally make use of ROM-able zImage formats
1088 normally set this to a suitable value in their defconfig file.
1089
1090 If ZBOOT_ROM is not enabled, this has no effect.
1091
1092 config ZBOOT_ROM
1093 bool "Compressed boot loader in ROM/flash"
1094 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1095 help
1096 Say Y here if you intend to execute your compressed kernel image
1097 (zImage) directly from ROM or flash. If unsure, say N.
1098
1099 config CMDLINE
1100 string "Default kernel command string"
1101 default ""
1102 help
1103 On some architectures (EBSA110 and CATS), there is currently no way
1104 for the boot loader to pass arguments to the kernel. For these
1105 architectures, you should supply some command-line options at build
1106 time by entering them here. As a minimum, you should specify the
1107 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1108
1109 config XIP_KERNEL
1110 bool "Kernel Execute-In-Place from ROM"
1111 depends on !ZBOOT_ROM
1112 help
1113 Execute-In-Place allows the kernel to run from non-volatile storage
1114 directly addressable by the CPU, such as NOR flash. This saves RAM
1115 space since the text section of the kernel is not loaded from flash
1116 to RAM. Read-write sections, such as the data section and stack,
1117 are still copied to RAM. The XIP kernel is not compressed since
1118 it has to run directly from flash, so it will take more space to
1119 store it. The flash address used to link the kernel object files,
1120 and for storing it, is configuration dependent. Therefore, if you
1121 say Y here, you must know the proper physical address where to
1122 store the kernel image depending on your own flash memory usage.
1123
1124 Also note that the make target becomes "make xipImage" rather than
1125 "make zImage" or "make Image". The final kernel binary to put in
1126 ROM memory will be arch/arm/boot/xipImage.
1127
1128 If unsure, say N.
1129
1130 config XIP_PHYS_ADDR
1131 hex "XIP Kernel Physical Location"
1132 depends on XIP_KERNEL
1133 default "0x00080000"
1134 help
1135 This is the physical address in your flash memory the kernel will
1136 be linked for and stored to. This address is dependent on your
1137 own flash usage.
1138
1139 config KEXEC
1140 bool "Kexec system call (EXPERIMENTAL)"
1141 depends on EXPERIMENTAL
1142 help
1143 kexec is a system call that implements the ability to shutdown your
1144 current kernel, and to start another kernel. It is like a reboot
1145 but it is independent of the system firmware. And like a reboot
1146 you can start any kernel with it, not just Linux.
1147
1148 It is an ongoing process to be certain the hardware in a machine
1149 is properly shutdown, so do not be surprised if this code does not
1150 initially work for you. It may help to enable device hotplugging
1151 support.
1152
1153 config ATAGS_PROC
1154 bool "Export atags in procfs"
1155 depends on KEXEC
1156 default y
1157 help
1158 Should the atags used to boot the kernel be exported in an "atags"
1159 file in procfs. Useful with kexec.
1160
1161 endmenu
1162
1163 menu "CPU Power Management"
1164
1165 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1166
1167 source "drivers/cpufreq/Kconfig"
1168
1169 config CPU_FREQ_SA1100
1170 bool
1171 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1172 default y
1173
1174 config CPU_FREQ_SA1110
1175 bool
1176 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1177 default y
1178
1179 config CPU_FREQ_INTEGRATOR
1180 tristate "CPUfreq driver for ARM Integrator CPUs"
1181 depends on ARCH_INTEGRATOR && CPU_FREQ
1182 default y
1183 help
1184 This enables the CPUfreq driver for ARM Integrator CPUs.
1185
1186 For details, take a look at <file:Documentation/cpu-freq>.
1187
1188 If in doubt, say Y.
1189
1190 config CPU_FREQ_IMX
1191 tristate "CPUfreq driver for i.MX CPUs"
1192 depends on ARCH_IMX && CPU_FREQ
1193 default n
1194 help
1195 This enables the CPUfreq driver for i.MX CPUs.
1196
1197 If in doubt, say N.
1198
1199 endif
1200
1201 source "drivers/cpuidle/Kconfig"
1202
1203 endmenu
1204
1205 menu "Floating point emulation"
1206
1207 comment "At least one emulation must be selected"
1208
1209 config FPE_NWFPE
1210 bool "NWFPE math emulation"
1211 depends on !AEABI || OABI_COMPAT
1212 ---help---
1213 Say Y to include the NWFPE floating point emulator in the kernel.
1214 This is necessary to run most binaries. Linux does not currently
1215 support floating point hardware so you need to say Y here even if
1216 your machine has an FPA or floating point co-processor podule.
1217
1218 You may say N here if you are going to load the Acorn FPEmulator
1219 early in the bootup.
1220
1221 config FPE_NWFPE_XP
1222 bool "Support extended precision"
1223 depends on FPE_NWFPE
1224 help
1225 Say Y to include 80-bit support in the kernel floating-point
1226 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1227 Note that gcc does not generate 80-bit operations by default,
1228 so in most cases this option only enlarges the size of the
1229 floating point emulator without any good reason.
1230
1231 You almost surely want to say N here.
1232
1233 config FPE_FASTFPE
1234 bool "FastFPE math emulation (EXPERIMENTAL)"
1235 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1236 ---help---
1237 Say Y here to include the FAST floating point emulator in the kernel.
1238 This is an experimental much faster emulator which now also has full
1239 precision for the mantissa. It does not support any exceptions.
1240 It is very simple, and approximately 3-6 times faster than NWFPE.
1241
1242 It should be sufficient for most programs. It may be not suitable
1243 for scientific calculations, but you have to check this for yourself.
1244 If you do not feel you need a faster FP emulation you should better
1245 choose NWFPE.
1246
1247 config VFP
1248 bool "VFP-format floating point maths"
1249 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1250 help
1251 Say Y to include VFP support code in the kernel. This is needed
1252 if your hardware includes a VFP unit.
1253
1254 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1255 release notes and additional status information.
1256
1257 Say N if your target does not have VFP hardware.
1258
1259 config VFPv3
1260 bool
1261 depends on VFP
1262 default y if CPU_V7
1263
1264 config NEON
1265 bool "Advanced SIMD (NEON) Extension support"
1266 depends on VFPv3 && CPU_V7
1267 help
1268 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1269 Extension.
1270
1271 endmenu
1272
1273 menu "Userspace binary formats"
1274
1275 source "fs/Kconfig.binfmt"
1276
1277 config ARTHUR
1278 tristate "RISC OS personality"
1279 depends on !AEABI
1280 help
1281 Say Y here to include the kernel code necessary if you want to run
1282 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1283 experimental; if this sounds frightening, say N and sleep in peace.
1284 You can also say M here to compile this support as a module (which
1285 will be called arthur).
1286
1287 endmenu
1288
1289 menu "Power management options"
1290
1291 source "kernel/power/Kconfig"
1292
1293 config ARCH_SUSPEND_POSSIBLE
1294 def_bool y
1295
1296 endmenu
1297
1298 source "net/Kconfig"
1299
1300 menu "Device Drivers"
1301
1302 source "drivers/base/Kconfig"
1303
1304 source "drivers/connector/Kconfig"
1305
1306 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1307 source "drivers/mtd/Kconfig"
1308 endif
1309
1310 source "drivers/parport/Kconfig"
1311
1312 source "drivers/pnp/Kconfig"
1313
1314 source "drivers/block/Kconfig"
1315
1316 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1317
1318 source "drivers/misc/Kconfig"
1319
1320 source "drivers/ide/Kconfig"
1321
1322 source "drivers/scsi/Kconfig"
1323
1324 source "drivers/ata/Kconfig"
1325
1326 source "drivers/md/Kconfig"
1327
1328 source "drivers/message/fusion/Kconfig"
1329
1330 source "drivers/ieee1394/Kconfig"
1331
1332 source "drivers/message/i2o/Kconfig"
1333
1334 source "drivers/net/Kconfig"
1335
1336 source "drivers/isdn/Kconfig"
1337
1338 # input before char - char/joystick depends on it. As does USB.
1339
1340 source "drivers/input/Kconfig"
1341
1342 source "drivers/char/Kconfig"
1343
1344 source "drivers/i2c/Kconfig"
1345
1346 source "drivers/spi/Kconfig"
1347
1348 source "drivers/gpio/Kconfig"
1349
1350 source "drivers/w1/Kconfig"
1351
1352 source "drivers/power/Kconfig"
1353
1354 source "drivers/hwmon/Kconfig"
1355
1356 source "drivers/thermal/Kconfig"
1357
1358 source "drivers/watchdog/Kconfig"
1359
1360 source "drivers/ssb/Kconfig"
1361
1362 #source "drivers/l3/Kconfig"
1363
1364 source "drivers/mfd/Kconfig"
1365
1366 source "drivers/media/Kconfig"
1367
1368 source "drivers/video/Kconfig"
1369
1370 source "sound/Kconfig"
1371
1372 source "drivers/hid/Kconfig"
1373
1374 source "drivers/usb/Kconfig"
1375
1376 source "drivers/uwb/Kconfig"
1377
1378 source "drivers/mmc/Kconfig"
1379
1380 source "drivers/memstick/Kconfig"
1381
1382 source "drivers/accessibility/Kconfig"
1383
1384 source "drivers/leds/Kconfig"
1385
1386 source "drivers/rtc/Kconfig"
1387
1388 source "drivers/dma/Kconfig"
1389
1390 source "drivers/dca/Kconfig"
1391
1392 source "drivers/auxdisplay/Kconfig"
1393
1394 source "drivers/regulator/Kconfig"
1395
1396 source "drivers/uio/Kconfig"
1397
1398 source "drivers/staging/Kconfig"
1399
1400 endmenu
1401
1402 source "fs/Kconfig"
1403
1404 source "arch/arm/Kconfig.debug"
1405
1406 source "security/Kconfig"
1407
1408 source "crypto/Kconfig"
1409
1410 source "lib/Kconfig"
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