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1 #
2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
4 #
6 mainmenu "Linux Kernel Configuration"
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/>.
29 config HAVE_PWM
30 bool
32 config SYS_SUPPORTS_APM_EMULATION
33 bool
35 config GENERIC_GPIO
36 bool
38 config GENERIC_TIME
39 bool
41 config GENERIC_CLOCKEVENTS
42 bool
44 config GENERIC_CLOCKEVENTS_BROADCAST
45 bool
46 depends on GENERIC_CLOCKEVENTS
47 default y if SMP && !LOCAL_TIMERS
49 config HAVE_TCM
50 bool
51 select GENERIC_ALLOCATOR
53 config NO_IOPORT
54 bool
56 config EISA
57 bool
58 ---help---
59 The Extended Industry Standard Architecture (EISA) bus was
60 developed as an open alternative to the IBM MicroChannel bus.
62 The EISA bus provided some of the features of the IBM MicroChannel
63 bus while maintaining backward compatibility with cards made for
64 the older ISA bus. The EISA bus saw limited use between 1988 and
65 1995 when it was made obsolete by the PCI bus.
67 Say Y here if you are building a kernel for an EISA-based machine.
69 Otherwise, say N.
71 config SBUS
72 bool
74 config MCA
75 bool
76 help
77 MicroChannel Architecture is found in some IBM PS/2 machines and
78 laptops. It is a bus system similar to PCI or ISA. See
79 <file:Documentation/mca.txt> (and especially the web page given
80 there) before attempting to build an MCA bus kernel.
82 config GENERIC_HARDIRQS
83 bool
84 default y
86 config STACKTRACE_SUPPORT
87 bool
88 default y
90 config HAVE_LATENCYTOP_SUPPORT
91 bool
92 depends on !SMP
93 default y
95 config LOCKDEP_SUPPORT
96 bool
97 default y
99 config TRACE_IRQFLAGS_SUPPORT
100 bool
101 default y
103 config HARDIRQS_SW_RESEND
104 bool
105 default y
107 config GENERIC_IRQ_PROBE
108 bool
109 default y
111 config GENERIC_LOCKBREAK
112 bool
113 default y
114 depends on SMP && PREEMPT
116 config RWSEM_GENERIC_SPINLOCK
117 bool
118 default y
120 config RWSEM_XCHGADD_ALGORITHM
121 bool
123 config ARCH_HAS_ILOG2_U32
124 bool
126 config ARCH_HAS_ILOG2_U64
127 bool
129 config ARCH_HAS_CPUFREQ
130 bool
131 help
132 Internal node to signify that the ARCH has CPUFREQ support
133 and that the relevant menu configurations are displayed for
134 it.
136 config GENERIC_HWEIGHT
137 bool
138 default y
140 config GENERIC_CALIBRATE_DELAY
141 bool
142 default y
144 config ARCH_MAY_HAVE_PC_FDC
145 bool
147 config ZONE_DMA
148 bool
150 config GENERIC_ISA_DMA
151 bool
153 config FIQ
154 bool
156 config ARCH_MTD_XIP
157 bool
159 config GENERIC_HARDIRQS_NO__DO_IRQ
160 def_bool y
162 if OPROFILE
164 config OPROFILE_ARMV6
165 def_bool y
166 depends on CPU_V6 && !SMP
167 select OPROFILE_ARM11_CORE
169 config OPROFILE_MPCORE
170 def_bool y
171 depends on CPU_V6 && SMP
172 select OPROFILE_ARM11_CORE
174 config OPROFILE_ARM11_CORE
175 bool
177 config OPROFILE_ARMV7
178 def_bool y
179 depends on CPU_V7 && !SMP
180 bool
182 endif
184 config VECTORS_BASE
185 hex
186 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
187 default DRAM_BASE if REMAP_VECTORS_TO_RAM
188 default 0x00000000
189 help
190 The base address of exception vectors.
192 source "init/Kconfig"
194 source "kernel/Kconfig.freezer"
196 menu "System Type"
198 config MMU
199 bool "MMU-based Paged Memory Management Support"
200 default y
201 help
202 Select if you want MMU-based virtualised addressing space
203 support by paged memory management. If unsure, say 'Y'.
205 choice
206 prompt "ARM system type"
207 default ARCH_VERSATILE
209 config ARCH_AAEC2000
210 bool "Agilent AAEC-2000 based"
211 select CPU_ARM920T
212 select ARM_AMBA
213 select HAVE_CLK
214 help
215 This enables support for systems based on the Agilent AAEC-2000
217 config ARCH_INTEGRATOR
218 bool "ARM Ltd. Integrator family"
219 select ARM_AMBA
220 select ARCH_HAS_CPUFREQ
221 select HAVE_CLK
222 select COMMON_CLKDEV
223 select ICST525
224 help
225 Support for ARM's Integrator platform.
227 config ARCH_REALVIEW
228 bool "ARM Ltd. RealView family"
229 select ARM_AMBA
230 select HAVE_CLK
231 select COMMON_CLKDEV
232 select ICST307
233 select GENERIC_TIME
234 select GENERIC_CLOCKEVENTS
235 select ARCH_WANT_OPTIONAL_GPIOLIB
236 help
237 This enables support for ARM Ltd RealView boards.
239 config ARCH_VERSATILE
240 bool "ARM Ltd. Versatile family"
241 select ARM_AMBA
242 select ARM_VIC
243 select HAVE_CLK
244 select COMMON_CLKDEV
245 select ICST307
246 select GENERIC_TIME
247 select GENERIC_CLOCKEVENTS
248 select ARCH_WANT_OPTIONAL_GPIOLIB
249 help
250 This enables support for ARM Ltd Versatile board.
252 config ARCH_AT91
253 bool "Atmel AT91"
254 select GENERIC_GPIO
255 select ARCH_REQUIRE_GPIOLIB
256 select HAVE_CLK
257 help
258 This enables support for systems based on the Atmel AT91RM9200,
259 AT91SAM9 and AT91CAP9 processors.
261 config ARCH_CLPS711X
262 bool "Cirrus Logic CLPS711x/EP721x-based"
263 select CPU_ARM720T
264 help
265 Support for Cirrus Logic 711x/721x based boards.
267 config ARCH_GEMINI
268 bool "Cortina Systems Gemini"
269 select CPU_FA526
270 select GENERIC_GPIO
271 select ARCH_REQUIRE_GPIOLIB
272 help
273 Support for the Cortina Systems Gemini family SoCs
275 config ARCH_EBSA110
276 bool "EBSA-110"
277 select CPU_SA110
278 select ISA
279 select NO_IOPORT
280 help
281 This is an evaluation board for the StrongARM processor available
282 from Digital. It has limited hardware on-board, including an
283 Ethernet interface, two PCMCIA sockets, two serial ports and a
284 parallel port.
286 config ARCH_EP93XX
287 bool "EP93xx-based"
288 select CPU_ARM920T
289 select ARM_AMBA
290 select ARM_VIC
291 select GENERIC_GPIO
292 select HAVE_CLK
293 select COMMON_CLKDEV
294 select ARCH_REQUIRE_GPIOLIB
295 select ARCH_HAS_HOLES_MEMORYMODEL
296 help
297 This enables support for the Cirrus EP93xx series of CPUs.
299 config ARCH_FOOTBRIDGE
300 bool "FootBridge"
301 select CPU_SA110
302 select FOOTBRIDGE
303 help
304 Support for systems based on the DC21285 companion chip
305 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
307 config ARCH_MXC
308 bool "Freescale MXC/iMX-based"
309 select GENERIC_TIME
310 select GENERIC_CLOCKEVENTS
311 select ARCH_MTD_XIP
312 select GENERIC_GPIO
313 select ARCH_REQUIRE_GPIOLIB
314 select HAVE_CLK
315 help
316 Support for Freescale MXC/iMX-based family of processors
318 config ARCH_STMP3XXX
319 bool "Freescale STMP3xxx"
320 select CPU_ARM926T
321 select HAVE_CLK
322 select COMMON_CLKDEV
323 select ARCH_REQUIRE_GPIOLIB
324 select GENERIC_TIME
325 select GENERIC_CLOCKEVENTS
326 select GENERIC_GPIO
327 select USB_ARCH_HAS_EHCI
328 help
329 Support for systems based on the Freescale 3xxx CPUs.
331 config ARCH_NETX
332 bool "Hilscher NetX based"
333 select CPU_ARM926T
334 select ARM_VIC
335 select GENERIC_CLOCKEVENTS
336 select GENERIC_TIME
337 help
338 This enables support for systems based on the Hilscher NetX Soc
340 config ARCH_H720X
341 bool "Hynix HMS720x-based"
342 select CPU_ARM720T
343 select ISA_DMA_API
344 help
345 This enables support for systems based on the Hynix HMS720x
347 config ARCH_NOMADIK
348 bool "STMicroelectronics Nomadik"
349 select ARM_AMBA
350 select ARM_VIC
351 select CPU_ARM926T
352 select HAVE_CLK
353 select COMMON_CLKDEV
354 select GENERIC_TIME
355 select GENERIC_CLOCKEVENTS
356 select GENERIC_GPIO
357 select ARCH_REQUIRE_GPIOLIB
358 help
359 Support for the Nomadik platform by ST-Ericsson
361 config ARCH_IOP13XX
362 bool "IOP13xx-based"
363 depends on MMU
364 select CPU_XSC3
365 select PLAT_IOP
366 select PCI
367 select ARCH_SUPPORTS_MSI
368 select VMSPLIT_1G
369 help
370 Support for Intel's IOP13XX (XScale) family of processors.
372 config ARCH_IOP32X
373 bool "IOP32x-based"
374 depends on MMU
375 select CPU_XSCALE
376 select PLAT_IOP
377 select PCI
378 select GENERIC_GPIO
379 select ARCH_REQUIRE_GPIOLIB
380 help
381 Support for Intel's 80219 and IOP32X (XScale) family of
382 processors.
384 config ARCH_IOP33X
385 bool "IOP33x-based"
386 depends on MMU
387 select CPU_XSCALE
388 select PLAT_IOP
389 select PCI
390 select GENERIC_GPIO
391 select ARCH_REQUIRE_GPIOLIB
392 help
393 Support for Intel's IOP33X (XScale) family of processors.
395 config ARCH_IXP23XX
396 bool "IXP23XX-based"
397 depends on MMU
398 select CPU_XSC3
399 select PCI
400 help
401 Support for Intel's IXP23xx (XScale) family of processors.
403 config ARCH_IXP2000
404 bool "IXP2400/2800-based"
405 depends on MMU
406 select CPU_XSCALE
407 select PCI
408 help
409 Support for Intel's IXP2400/2800 (XScale) family of processors.
411 config ARCH_IXP4XX
412 bool "IXP4xx-based"
413 depends on MMU
414 select CPU_XSCALE
415 select GENERIC_GPIO
416 select GENERIC_TIME
417 select GENERIC_CLOCKEVENTS
418 select DMABOUNCE if PCI
419 help
420 Support for Intel's IXP4XX (XScale) family of processors.
422 config ARCH_L7200
423 bool "LinkUp-L7200"
424 select CPU_ARM720T
425 select FIQ
426 help
427 Say Y here if you intend to run this kernel on a LinkUp Systems
428 L7200 Software Development Board which uses an ARM720T processor.
429 Information on this board can be obtained at:
431 <http://www.linkupsys.com/>
433 If you have any questions or comments about the Linux kernel port
434 to this board, send e-mail to <sjhill@cotw.com>.
436 config ARCH_KIRKWOOD
437 bool "Marvell Kirkwood"
438 select CPU_FEROCEON
439 select PCI
440 select GENERIC_GPIO
441 select ARCH_REQUIRE_GPIOLIB
442 select GENERIC_TIME
443 select GENERIC_CLOCKEVENTS
444 select PLAT_ORION
445 help
446 Support for the following Marvell Kirkwood series SoCs:
447 88F6180, 88F6192 and 88F6281.
449 config ARCH_LOKI
450 bool "Marvell Loki (88RC8480)"
451 select CPU_FEROCEON
452 select GENERIC_TIME
453 select GENERIC_CLOCKEVENTS
454 select PLAT_ORION
455 help
456 Support for the Marvell Loki (88RC8480) SoC.
458 config ARCH_MV78XX0
459 bool "Marvell MV78xx0"
460 select CPU_FEROCEON
461 select PCI
462 select GENERIC_GPIO
463 select ARCH_REQUIRE_GPIOLIB
464 select GENERIC_TIME
465 select GENERIC_CLOCKEVENTS
466 select PLAT_ORION
467 help
468 Support for the following Marvell MV78xx0 series SoCs:
469 MV781x0, MV782x0.
471 config ARCH_ORION5X
472 bool "Marvell Orion"
473 depends on MMU
474 select CPU_FEROCEON
475 select PCI
476 select GENERIC_GPIO
477 select ARCH_REQUIRE_GPIOLIB
478 select GENERIC_TIME
479 select GENERIC_CLOCKEVENTS
480 select PLAT_ORION
481 help
482 Support for the following Marvell Orion 5x series SoCs:
483 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
484 Orion-2 (5281), Orion-1-90 (6183).
486 config ARCH_MMP
487 bool "Marvell PXA168/910"
488 depends on MMU
489 select GENERIC_GPIO
490 select ARCH_REQUIRE_GPIOLIB
491 select HAVE_CLK
492 select COMMON_CLKDEV
493 select GENERIC_TIME
494 select GENERIC_CLOCKEVENTS
495 select TICK_ONESHOT
496 select PLAT_PXA
497 help
498 Support for Marvell's PXA168/910 processor line.
500 config ARCH_KS8695
501 bool "Micrel/Kendin KS8695"
502 select CPU_ARM922T
503 select GENERIC_GPIO
504 select ARCH_REQUIRE_GPIOLIB
505 help
506 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
507 System-on-Chip devices.
509 config ARCH_NS9XXX
510 bool "NetSilicon NS9xxx"
511 select CPU_ARM926T
512 select GENERIC_GPIO
513 select GENERIC_TIME
514 select GENERIC_CLOCKEVENTS
515 select HAVE_CLK
516 help
517 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
518 System.
520 <http://www.digi.com/products/microprocessors/index.jsp>
522 config ARCH_W90X900
523 bool "Nuvoton W90X900 CPU"
524 select CPU_ARM926T
525 select ARCH_REQUIRE_GPIOLIB
526 select GENERIC_GPIO
527 select HAVE_CLK
528 select COMMON_CLKDEV
529 select GENERIC_TIME
530 select GENERIC_CLOCKEVENTS
531 help
532 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
533 At present, the w90x900 has been renamed nuc900, regarding
534 the ARM series product line, you can login the following
535 link address to know more.
537 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
538 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
540 config ARCH_PNX4008
541 bool "Philips Nexperia PNX4008 Mobile"
542 select CPU_ARM926T
543 select HAVE_CLK
544 help
545 This enables support for Philips PNX4008 mobile platform.
547 config ARCH_PXA
548 bool "PXA2xx/PXA3xx-based"
549 depends on MMU
550 select ARCH_MTD_XIP
551 select ARCH_HAS_CPUFREQ
552 select GENERIC_GPIO
553 select HAVE_CLK
554 select COMMON_CLKDEV
555 select ARCH_REQUIRE_GPIOLIB
556 select GENERIC_TIME
557 select GENERIC_CLOCKEVENTS
558 select TICK_ONESHOT
559 select PLAT_PXA
560 help
561 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
563 config ARCH_MSM
564 bool "Qualcomm MSM"
565 select CPU_V6
566 select GENERIC_TIME
567 select GENERIC_CLOCKEVENTS
568 help
569 Support for Qualcomm MSM7K based systems. This runs on the ARM11
570 apps processor of the MSM7K and depends on a shared memory
571 interface to the ARM9 modem processor which runs the baseband stack
572 and controls some vital subsystems (clock and power control, etc).
574 config ARCH_RPC
575 bool "RiscPC"
576 select ARCH_ACORN
577 select FIQ
578 select TIMER_ACORN
579 select ARCH_MAY_HAVE_PC_FDC
580 select HAVE_PATA_PLATFORM
581 select ISA_DMA_API
582 select NO_IOPORT
583 select ARCH_SPARSEMEM_ENABLE
584 help
585 On the Acorn Risc-PC, Linux can support the internal IDE disk and
586 CD-ROM interface, serial and parallel port, and the floppy drive.
588 config ARCH_SA1100
589 bool "SA1100-based"
590 select CPU_SA1100
591 select ISA
592 select ARCH_SPARSEMEM_ENABLE
593 select ARCH_MTD_XIP
594 select ARCH_HAS_CPUFREQ
595 select GENERIC_GPIO
596 select GENERIC_TIME
597 select GENERIC_CLOCKEVENTS
598 select HAVE_CLK
599 select TICK_ONESHOT
600 select ARCH_REQUIRE_GPIOLIB
601 help
602 Support for StrongARM 11x0 based boards.
604 config ARCH_S3C2410
605 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
606 select GENERIC_GPIO
607 select ARCH_HAS_CPUFREQ
608 select HAVE_CLK
609 help
610 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
611 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
612 the Samsung SMDK2410 development board (and derivatives).
614 config ARCH_S3C64XX
615 bool "Samsung S3C64XX"
616 select GENERIC_GPIO
617 select HAVE_CLK
618 select ARCH_HAS_CPUFREQ
619 help
620 Samsung S3C64XX series based systems
622 config ARCH_S5PC1XX
623 bool "Samsung S5PC1XX"
624 select GENERIC_GPIO
625 select HAVE_CLK
626 select CPU_V7
627 help
628 Samsung S5PC1XX series based systems
630 config ARCH_SHARK
631 bool "Shark"
632 select CPU_SA110
633 select ISA
634 select ISA_DMA
635 select ZONE_DMA
636 select PCI
637 help
638 Support for the StrongARM based Digital DNARD machine, also known
639 as "Shark" (<http://www.shark-linux.de/shark.html>).
641 config ARCH_LH7A40X
642 bool "Sharp LH7A40X"
643 select CPU_ARM922T
644 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
645 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
646 help
647 Say Y here for systems based on one of the Sharp LH7A40X
648 System on a Chip processors. These CPUs include an ARM922T
649 core with a wide array of integrated devices for
650 hand-held and low-power applications.
652 config ARCH_U300
653 bool "ST-Ericsson U300 Series"
654 depends on MMU
655 select CPU_ARM926T
656 select HAVE_TCM
657 select ARM_AMBA
658 select ARM_VIC
659 select GENERIC_TIME
660 select GENERIC_CLOCKEVENTS
661 select HAVE_CLK
662 select COMMON_CLKDEV
663 select GENERIC_GPIO
664 help
665 Support for ST-Ericsson U300 series mobile platforms.
667 config ARCH_DAVINCI
668 bool "TI DaVinci"
669 select CPU_ARM926T
670 select GENERIC_TIME
671 select GENERIC_CLOCKEVENTS
672 select GENERIC_GPIO
673 select ARCH_REQUIRE_GPIOLIB
674 select HAVE_CLK
675 select ZONE_DMA
676 select HAVE_IDE
677 select COMMON_CLKDEV
678 select GENERIC_ALLOCATOR
679 help
680 Support for TI's DaVinci platform.
682 config ARCH_OMAP
683 bool "TI OMAP"
684 select GENERIC_GPIO
685 select HAVE_CLK
686 select ARCH_REQUIRE_GPIOLIB
687 select ARCH_HAS_CPUFREQ
688 select GENERIC_TIME
689 select GENERIC_CLOCKEVENTS
690 help
691 Support for TI's OMAP platform (OMAP1 and OMAP2).
693 config ARCH_BCMRING
694 bool "Broadcom BCMRING"
695 depends on MMU
696 select CPU_V6
697 select ARM_AMBA
698 select COMMON_CLKDEV
699 select GENERIC_TIME
700 select GENERIC_CLOCKEVENTS
701 select ARCH_WANT_OPTIONAL_GPIOLIB
702 help
703 Support for Broadcom's BCMRing platform.
705 endchoice
707 source "arch/arm/mach-clps711x/Kconfig"
709 source "arch/arm/mach-ep93xx/Kconfig"
711 source "arch/arm/mach-footbridge/Kconfig"
713 source "arch/arm/mach-gemini/Kconfig"
715 source "arch/arm/mach-integrator/Kconfig"
717 source "arch/arm/mach-iop32x/Kconfig"
719 source "arch/arm/mach-iop33x/Kconfig"
721 source "arch/arm/mach-iop13xx/Kconfig"
723 source "arch/arm/mach-ixp4xx/Kconfig"
725 source "arch/arm/mach-ixp2000/Kconfig"
727 source "arch/arm/mach-ixp23xx/Kconfig"
729 source "arch/arm/mach-loki/Kconfig"
731 source "arch/arm/mach-mv78xx0/Kconfig"
733 source "arch/arm/mach-pxa/Kconfig"
734 source "arch/arm/plat-pxa/Kconfig"
736 source "arch/arm/mach-mmp/Kconfig"
738 source "arch/arm/mach-sa1100/Kconfig"
740 source "arch/arm/plat-omap/Kconfig"
742 source "arch/arm/mach-omap1/Kconfig"
744 source "arch/arm/mach-omap2/Kconfig"
746 source "arch/arm/mach-orion5x/Kconfig"
748 source "arch/arm/mach-kirkwood/Kconfig"
750 source "arch/arm/plat-s3c24xx/Kconfig"
751 source "arch/arm/plat-s3c64xx/Kconfig"
752 source "arch/arm/plat-s3c/Kconfig"
753 source "arch/arm/plat-s5pc1xx/Kconfig"
755 if ARCH_S3C2410
756 source "arch/arm/mach-s3c2400/Kconfig"
757 source "arch/arm/mach-s3c2410/Kconfig"
758 source "arch/arm/mach-s3c2412/Kconfig"
759 source "arch/arm/mach-s3c2440/Kconfig"
760 source "arch/arm/mach-s3c2442/Kconfig"
761 source "arch/arm/mach-s3c2443/Kconfig"
762 endif
764 if ARCH_S3C64XX
765 source "arch/arm/mach-s3c6400/Kconfig"
766 source "arch/arm/mach-s3c6410/Kconfig"
767 endif
769 source "arch/arm/plat-stmp3xxx/Kconfig"
771 if ARCH_S5PC1XX
772 source "arch/arm/mach-s5pc100/Kconfig"
773 endif
775 source "arch/arm/mach-lh7a40x/Kconfig"
777 source "arch/arm/mach-h720x/Kconfig"
779 source "arch/arm/mach-versatile/Kconfig"
781 source "arch/arm/mach-aaec2000/Kconfig"
783 source "arch/arm/mach-realview/Kconfig"
785 source "arch/arm/mach-at91/Kconfig"
787 source "arch/arm/plat-mxc/Kconfig"
789 source "arch/arm/mach-nomadik/Kconfig"
791 source "arch/arm/mach-netx/Kconfig"
793 source "arch/arm/mach-ns9xxx/Kconfig"
795 source "arch/arm/mach-davinci/Kconfig"
797 source "arch/arm/mach-ks8695/Kconfig"
799 source "arch/arm/mach-msm/Kconfig"
801 source "arch/arm/mach-u300/Kconfig"
803 source "arch/arm/mach-w90x900/Kconfig"
805 source "arch/arm/mach-bcmring/Kconfig"
807 # Definitions to make life easier
808 config ARCH_ACORN
809 bool
811 config PLAT_IOP
812 bool
814 config PLAT_ORION
815 bool
817 config PLAT_PXA
818 bool
820 source arch/arm/mm/Kconfig
822 config IWMMXT
823 bool "Enable iWMMXt support"
824 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
825 default y if PXA27x || PXA3xx || ARCH_MMP
826 help
827 Enable support for iWMMXt context switching at run time if
828 running on a CPU that supports it.
830 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
831 config XSCALE_PMU
832 bool
833 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
834 default y
836 if !MMU
837 source "arch/arm/Kconfig-nommu"
838 endif
840 config ARM_ERRATA_411920
841 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
842 depends on CPU_V6 && !SMP
843 help
844 Invalidation of the Instruction Cache operation can
845 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
846 It does not affect the MPCore. This option enables the ARM Ltd.
847 recommended workaround.
849 config ARM_ERRATA_430973
850 bool "ARM errata: Stale prediction on replaced interworking branch"
851 depends on CPU_V7
852 help
853 This option enables the workaround for the 430973 Cortex-A8
854 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
855 interworking branch is replaced with another code sequence at the
856 same virtual address, whether due to self-modifying code or virtual
857 to physical address re-mapping, Cortex-A8 does not recover from the
858 stale interworking branch prediction. This results in Cortex-A8
859 executing the new code sequence in the incorrect ARM or Thumb state.
860 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
861 and also flushes the branch target cache at every context switch.
862 Note that setting specific bits in the ACTLR register may not be
863 available in non-secure mode.
865 config ARM_ERRATA_458693
866 bool "ARM errata: Processor deadlock when a false hazard is created"
867 depends on CPU_V7
868 help
869 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
870 erratum. For very specific sequences of memory operations, it is
871 possible for a hazard condition intended for a cache line to instead
872 be incorrectly associated with a different cache line. This false
873 hazard might then cause a processor deadlock. The workaround enables
874 the L1 caching of the NEON accesses and disables the PLD instruction
875 in the ACTLR register. Note that setting specific bits in the ACTLR
876 register may not be available in non-secure mode.
878 config ARM_ERRATA_460075
879 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
880 depends on CPU_V7
881 help
882 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
883 erratum. Any asynchronous access to the L2 cache may encounter a
884 situation in which recent store transactions to the L2 cache are lost
885 and overwritten with stale memory contents from external memory. The
886 workaround disables the write-allocate mode for the L2 cache via the
887 ACTLR register. Note that setting specific bits in the ACTLR register
888 may not be available in non-secure mode.
890 endmenu
892 source "arch/arm/common/Kconfig"
894 config FORCE_MAX_ZONEORDER
895 int
896 depends on SA1111
897 default "9"
899 menu "Bus support"
901 config ARM_AMBA
902 bool
904 config ISA
905 bool
906 help
907 Find out whether you have ISA slots on your motherboard. ISA is the
908 name of a bus system, i.e. the way the CPU talks to the other stuff
909 inside your box. Other bus systems are PCI, EISA, MicroChannel
910 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
911 newer boards don't support it. If you have ISA, say Y, otherwise N.
913 # Select ISA DMA controller support
914 config ISA_DMA
915 bool
916 select ISA_DMA_API
918 # Select ISA DMA interface
919 config ISA_DMA_API
920 bool
922 config PCI
923 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
924 help
925 Find out whether you have a PCI motherboard. PCI is the name of a
926 bus system, i.e. the way the CPU talks to the other stuff inside
927 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
928 VESA. If you have PCI, say Y, otherwise N.
930 config PCI_SYSCALL
931 def_bool PCI
933 # Select the host bridge type
934 config PCI_HOST_VIA82C505
935 bool
936 depends on PCI && ARCH_SHARK
937 default y
939 config PCI_HOST_ITE8152
940 bool
941 depends on PCI && MACH_ARMCORE
942 default y
943 select DMABOUNCE
945 source "drivers/pci/Kconfig"
947 source "drivers/pcmcia/Kconfig"
949 endmenu
951 menu "Kernel Features"
953 source "kernel/time/Kconfig"
955 config SMP
956 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
957 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
958 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
959 depends on GENERIC_CLOCKEVENTS
960 select USE_GENERIC_SMP_HELPERS
961 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4)
962 help
963 This enables support for systems with more than one CPU. If you have
964 a system with only one CPU, like most personal computers, say N. If
965 you have a system with more than one CPU, say Y.
967 If you say N here, the kernel will run on single and multiprocessor
968 machines, but will use only one CPU of a multiprocessor machine. If
969 you say Y here, the kernel will run on many, but not all, single
970 processor machines. On a single processor machine, the kernel will
971 run faster if you say N here.
973 See also <file:Documentation/i386/IO-APIC.txt>,
974 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
975 <http://www.linuxdoc.org/docs.html#howto>.
977 If you don't know what to do here, say N.
979 config HAVE_ARM_SCU
980 bool
981 depends on SMP
982 help
983 This option enables support for the ARM system coherency unit
985 config HAVE_ARM_TWD
986 bool
987 depends on SMP
988 help
989 This options enables support for the ARM timer and watchdog unit
991 choice
992 prompt "Memory split"
993 default VMSPLIT_3G
994 help
995 Select the desired split between kernel and user memory.
997 If you are not absolutely sure what you are doing, leave this
998 option alone!
1000 config VMSPLIT_3G
1001 bool "3G/1G user/kernel split"
1002 config VMSPLIT_2G
1003 bool "2G/2G user/kernel split"
1004 config VMSPLIT_1G
1005 bool "1G/3G user/kernel split"
1006 endchoice
1008 config PAGE_OFFSET
1009 hex
1010 default 0x40000000 if VMSPLIT_1G
1011 default 0x80000000 if VMSPLIT_2G
1012 default 0xC0000000
1014 config NR_CPUS
1015 int "Maximum number of CPUs (2-32)"
1016 range 2 32
1017 depends on SMP
1018 default "4"
1020 config HOTPLUG_CPU
1021 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1022 depends on SMP && HOTPLUG && EXPERIMENTAL
1023 help
1024 Say Y here to experiment with turning CPUs off and on. CPUs
1025 can be controlled through /sys/devices/system/cpu.
1027 config LOCAL_TIMERS
1028 bool "Use local timer interrupts"
1029 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1030 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
1031 default y
1032 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4)
1033 help
1034 Enable support for local timers on SMP platforms, rather then the
1035 legacy IPI broadcast method. Local timers allows the system
1036 accounting to be spread across the timer interval, preventing a
1037 "thundering herd" at every timer tick.
1039 source kernel/Kconfig.preempt
1041 config HZ
1042 int
1043 default 128 if ARCH_L7200
1044 default 200 if ARCH_EBSA110 || ARCH_S3C2410
1045 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1046 default AT91_TIMER_HZ if ARCH_AT91
1047 default 100
1049 config THUMB2_KERNEL
1050 bool "Compile the kernel in Thumb-2 mode"
1051 depends on CPU_V7 && EXPERIMENTAL
1052 select AEABI
1053 select ARM_ASM_UNIFIED
1054 help
1055 By enabling this option, the kernel will be compiled in
1056 Thumb-2 mode. A compiler/assembler that understand the unified
1057 ARM-Thumb syntax is needed.
1059 If unsure, say N.
1061 config ARM_ASM_UNIFIED
1062 bool
1064 config AEABI
1065 bool "Use the ARM EABI to compile the kernel"
1066 help
1067 This option allows for the kernel to be compiled using the latest
1068 ARM ABI (aka EABI). This is only useful if you are using a user
1069 space environment that is also compiled with EABI.
1071 Since there are major incompatibilities between the legacy ABI and
1072 EABI, especially with regard to structure member alignment, this
1073 option also changes the kernel syscall calling convention to
1074 disambiguate both ABIs and allow for backward compatibility support
1075 (selected with CONFIG_OABI_COMPAT).
1077 To use this you need GCC version 4.0.0 or later.
1079 config OABI_COMPAT
1080 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1081 depends on AEABI && EXPERIMENTAL
1082 default y
1083 help
1084 This option preserves the old syscall interface along with the
1085 new (ARM EABI) one. It also provides a compatibility layer to
1086 intercept syscalls that have structure arguments which layout
1087 in memory differs between the legacy ABI and the new ARM EABI
1088 (only for non "thumb" binaries). This option adds a tiny
1089 overhead to all syscalls and produces a slightly larger kernel.
1090 If you know you'll be using only pure EABI user space then you
1091 can say N here. If this option is not selected and you attempt
1092 to execute a legacy ABI binary then the result will be
1093 UNPREDICTABLE (in fact it can be predicted that it won't work
1094 at all). If in doubt say Y.
1096 config ARCH_HAS_HOLES_MEMORYMODEL
1097 bool
1099 # Discontigmem is deprecated
1100 config ARCH_DISCONTIGMEM_ENABLE
1101 bool
1103 config ARCH_SPARSEMEM_ENABLE
1104 bool
1106 config ARCH_SPARSEMEM_DEFAULT
1107 def_bool ARCH_SPARSEMEM_ENABLE
1109 config ARCH_SELECT_MEMORY_MODEL
1110 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1112 config NODES_SHIFT
1113 int
1114 default "4" if ARCH_LH7A40X
1115 default "2"
1116 depends on NEED_MULTIPLE_NODES
1118 config HIGHMEM
1119 bool "High Memory Support (EXPERIMENTAL)"
1120 depends on MMU && EXPERIMENTAL
1121 help
1122 The address space of ARM processors is only 4 Gigabytes large
1123 and it has to accommodate user address space, kernel address
1124 space as well as some memory mapped IO. That means that, if you
1125 have a large amount of physical memory and/or IO, not all of the
1126 memory can be "permanently mapped" by the kernel. The physical
1127 memory that is not permanently mapped is called "high memory".
1129 Depending on the selected kernel/user memory split, minimum
1130 vmalloc space and actual amount of RAM, you may not need this
1131 option which should result in a slightly faster kernel.
1133 If unsure, say n.
1135 config HIGHPTE
1136 bool "Allocate 2nd-level pagetables from highmem"
1137 depends on HIGHMEM
1138 depends on !OUTER_CACHE
1140 source "mm/Kconfig"
1142 config LEDS
1143 bool "Timer and CPU usage LEDs"
1144 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1145 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1146 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1147 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1148 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1149 ARCH_AT91 || ARCH_DAVINCI || \
1150 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1151 help
1152 If you say Y here, the LEDs on your machine will be used
1153 to provide useful information about your current system status.
1155 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1156 be able to select which LEDs are active using the options below. If
1157 you are compiling a kernel for the EBSA-110 or the LART however, the
1158 red LED will simply flash regularly to indicate that the system is
1159 still functional. It is safe to say Y here if you have a CATS
1160 system, but the driver will do nothing.
1162 config LEDS_TIMER
1163 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1164 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1165 || MACH_OMAP_PERSEUS2
1166 depends on LEDS
1167 depends on !GENERIC_CLOCKEVENTS
1168 default y if ARCH_EBSA110
1169 help
1170 If you say Y here, one of the system LEDs (the green one on the
1171 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1172 will flash regularly to indicate that the system is still
1173 operational. This is mainly useful to kernel hackers who are
1174 debugging unstable kernels.
1176 The LART uses the same LED for both Timer LED and CPU usage LED
1177 functions. You may choose to use both, but the Timer LED function
1178 will overrule the CPU usage LED.
1180 config LEDS_CPU
1181 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1182 !ARCH_OMAP) \
1183 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1184 || MACH_OMAP_PERSEUS2
1185 depends on LEDS
1186 help
1187 If you say Y here, the red LED will be used to give a good real
1188 time indication of CPU usage, by lighting whenever the idle task
1189 is not currently executing.
1191 The LART uses the same LED for both Timer LED and CPU usage LED
1192 functions. You may choose to use both, but the Timer LED function
1193 will overrule the CPU usage LED.
1195 config ALIGNMENT_TRAP
1196 bool
1197 depends on CPU_CP15_MMU
1198 default y if !ARCH_EBSA110
1199 help
1200 ARM processors cannot fetch/store information which is not
1201 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1202 address divisible by 4. On 32-bit ARM processors, these non-aligned
1203 fetch/store instructions will be emulated in software if you say
1204 here, which has a severe performance impact. This is necessary for
1205 correct operation of some network protocols. With an IP-only
1206 configuration it is safe to say N, otherwise say Y.
1208 config UACCESS_WITH_MEMCPY
1209 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1210 depends on MMU && EXPERIMENTAL
1211 default y if CPU_FEROCEON
1212 help
1213 Implement faster copy_to_user and clear_user methods for CPU
1214 cores where a 8-word STM instruction give significantly higher
1215 memory write throughput than a sequence of individual 32bit stores.
1217 A possible side effect is a slight increase in scheduling latency
1218 between threads sharing the same address space if they invoke
1219 such copy operations with large buffers.
1221 However, if the CPU data cache is using a write-allocate mode,
1222 this option is unlikely to provide any performance gain.
1224 endmenu
1226 menu "Boot options"
1228 # Compressed boot loader in ROM. Yes, we really want to ask about
1229 # TEXT and BSS so we preserve their values in the config files.
1230 config ZBOOT_ROM_TEXT
1231 hex "Compressed ROM boot loader base address"
1232 default "0"
1233 help
1234 The physical address at which the ROM-able zImage is to be
1235 placed in the target. Platforms which normally make use of
1236 ROM-able zImage formats normally set this to a suitable
1237 value in their defconfig file.
1239 If ZBOOT_ROM is not enabled, this has no effect.
1241 config ZBOOT_ROM_BSS
1242 hex "Compressed ROM boot loader BSS address"
1243 default "0"
1244 help
1245 The base address of an area of read/write memory in the target
1246 for the ROM-able zImage which must be available while the
1247 decompressor is running. It must be large enough to hold the
1248 entire decompressed kernel plus an additional 128 KiB.
1249 Platforms which normally make use of ROM-able zImage formats
1250 normally set this to a suitable value in their defconfig file.
1252 If ZBOOT_ROM is not enabled, this has no effect.
1254 config ZBOOT_ROM
1255 bool "Compressed boot loader in ROM/flash"
1256 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1257 help
1258 Say Y here if you intend to execute your compressed kernel image
1259 (zImage) directly from ROM or flash. If unsure, say N.
1261 config CMDLINE
1262 string "Default kernel command string"
1263 default ""
1264 help
1265 On some architectures (EBSA110 and CATS), there is currently no way
1266 for the boot loader to pass arguments to the kernel. For these
1267 architectures, you should supply some command-line options at build
1268 time by entering them here. As a minimum, you should specify the
1269 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1271 config XIP_KERNEL
1272 bool "Kernel Execute-In-Place from ROM"
1273 depends on !ZBOOT_ROM
1274 help
1275 Execute-In-Place allows the kernel to run from non-volatile storage
1276 directly addressable by the CPU, such as NOR flash. This saves RAM
1277 space since the text section of the kernel is not loaded from flash
1278 to RAM. Read-write sections, such as the data section and stack,
1279 are still copied to RAM. The XIP kernel is not compressed since
1280 it has to run directly from flash, so it will take more space to
1281 store it. The flash address used to link the kernel object files,
1282 and for storing it, is configuration dependent. Therefore, if you
1283 say Y here, you must know the proper physical address where to
1284 store the kernel image depending on your own flash memory usage.
1286 Also note that the make target becomes "make xipImage" rather than
1287 "make zImage" or "make Image". The final kernel binary to put in
1288 ROM memory will be arch/arm/boot/xipImage.
1290 If unsure, say N.
1292 config XIP_PHYS_ADDR
1293 hex "XIP Kernel Physical Location"
1294 depends on XIP_KERNEL
1295 default "0x00080000"
1296 help
1297 This is the physical address in your flash memory the kernel will
1298 be linked for and stored to. This address is dependent on your
1299 own flash usage.
1301 config KEXEC
1302 bool "Kexec system call (EXPERIMENTAL)"
1303 depends on EXPERIMENTAL
1304 help
1305 kexec is a system call that implements the ability to shutdown your
1306 current kernel, and to start another kernel. It is like a reboot
1307 but it is independent of the system firmware. And like a reboot
1308 you can start any kernel with it, not just Linux.
1310 It is an ongoing process to be certain the hardware in a machine
1311 is properly shutdown, so do not be surprised if this code does not
1312 initially work for you. It may help to enable device hotplugging
1313 support.
1315 config ATAGS_PROC
1316 bool "Export atags in procfs"
1317 depends on KEXEC
1318 default y
1319 help
1320 Should the atags used to boot the kernel be exported in an "atags"
1321 file in procfs. Useful with kexec.
1323 endmenu
1325 menu "CPU Power Management"
1327 if ARCH_HAS_CPUFREQ
1329 source "drivers/cpufreq/Kconfig"
1331 config CPU_FREQ_SA1100
1332 bool
1333 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1334 default y
1336 config CPU_FREQ_SA1110
1337 bool
1338 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1339 default y
1341 config CPU_FREQ_INTEGRATOR
1342 tristate "CPUfreq driver for ARM Integrator CPUs"
1343 depends on ARCH_INTEGRATOR && CPU_FREQ
1344 default y
1345 help
1346 This enables the CPUfreq driver for ARM Integrator CPUs.
1348 For details, take a look at <file:Documentation/cpu-freq>.
1350 If in doubt, say Y.
1352 config CPU_FREQ_PXA
1353 bool
1354 depends on CPU_FREQ && ARCH_PXA && PXA25x
1355 default y
1356 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1358 config CPU_FREQ_S3C64XX
1359 bool "CPUfreq support for Samsung S3C64XX CPUs"
1360 depends on CPU_FREQ && CPU_S3C6410
1362 config CPU_FREQ_S3C
1363 bool
1364 help
1365 Internal configuration node for common cpufreq on Samsung SoC
1367 config CPU_FREQ_S3C24XX
1368 bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1369 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1370 select CPU_FREQ_S3C
1371 help
1372 This enables the CPUfreq driver for the Samsung S3C24XX family
1373 of CPUs.
1375 For details, take a look at <file:Documentation/cpu-freq>.
1377 If in doubt, say N.
1379 config CPU_FREQ_S3C24XX_PLL
1380 bool "Support CPUfreq changing of PLL frequency"
1381 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1382 help
1383 Compile in support for changing the PLL frequency from the
1384 S3C24XX series CPUfreq driver. The PLL takes time to settle
1385 after a frequency change, so by default it is not enabled.
1387 This also means that the PLL tables for the selected CPU(s) will
1388 be built which may increase the size of the kernel image.
1390 config CPU_FREQ_S3C24XX_DEBUG
1391 bool "Debug CPUfreq Samsung driver core"
1392 depends on CPU_FREQ_S3C24XX
1393 help
1394 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1396 config CPU_FREQ_S3C24XX_IODEBUG
1397 bool "Debug CPUfreq Samsung driver IO timing"
1398 depends on CPU_FREQ_S3C24XX
1399 help
1400 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1402 config CPU_FREQ_S3C24XX_DEBUGFS
1403 bool "Export debugfs for CPUFreq"
1404 depends on CPU_FREQ_S3C24XX && DEBUG_FS
1405 help
1406 Export status information via debugfs.
1408 endif
1410 source "drivers/cpuidle/Kconfig"
1412 endmenu
1414 menu "Floating point emulation"
1416 comment "At least one emulation must be selected"
1418 config FPE_NWFPE
1419 bool "NWFPE math emulation"
1420 depends on !AEABI || OABI_COMPAT
1421 ---help---
1422 Say Y to include the NWFPE floating point emulator in the kernel.
1423 This is necessary to run most binaries. Linux does not currently
1424 support floating point hardware so you need to say Y here even if
1425 your machine has an FPA or floating point co-processor podule.
1427 You may say N here if you are going to load the Acorn FPEmulator
1428 early in the bootup.
1430 config FPE_NWFPE_XP
1431 bool "Support extended precision"
1432 depends on FPE_NWFPE
1433 help
1434 Say Y to include 80-bit support in the kernel floating-point
1435 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1436 Note that gcc does not generate 80-bit operations by default,
1437 so in most cases this option only enlarges the size of the
1438 floating point emulator without any good reason.
1440 You almost surely want to say N here.
1442 config FPE_FASTFPE
1443 bool "FastFPE math emulation (EXPERIMENTAL)"
1444 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1445 ---help---
1446 Say Y here to include the FAST floating point emulator in the kernel.
1447 This is an experimental much faster emulator which now also has full
1448 precision for the mantissa. It does not support any exceptions.
1449 It is very simple, and approximately 3-6 times faster than NWFPE.
1451 It should be sufficient for most programs. It may be not suitable
1452 for scientific calculations, but you have to check this for yourself.
1453 If you do not feel you need a faster FP emulation you should better
1454 choose NWFPE.
1456 config VFP
1457 bool "VFP-format floating point maths"
1458 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1459 help
1460 Say Y to include VFP support code in the kernel. This is needed
1461 if your hardware includes a VFP unit.
1463 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1464 release notes and additional status information.
1466 Say N if your target does not have VFP hardware.
1468 config VFPv3
1469 bool
1470 depends on VFP
1471 default y if CPU_V7
1473 config NEON
1474 bool "Advanced SIMD (NEON) Extension support"
1475 depends on VFPv3 && CPU_V7
1476 help
1477 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1478 Extension.
1480 endmenu
1482 menu "Userspace binary formats"
1484 source "fs/Kconfig.binfmt"
1486 config ARTHUR
1487 tristate "RISC OS personality"
1488 depends on !AEABI
1489 help
1490 Say Y here to include the kernel code necessary if you want to run
1491 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1492 experimental; if this sounds frightening, say N and sleep in peace.
1493 You can also say M here to compile this support as a module (which
1494 will be called arthur).
1496 endmenu
1498 menu "Power management options"
1500 source "kernel/power/Kconfig"
1502 config ARCH_SUSPEND_POSSIBLE
1503 def_bool y
1505 endmenu
1507 source "net/Kconfig"
1509 source "drivers/Kconfig"
1511 if ARCH_OMAP
1512 source "drivers/cbus/Kconfig"
1513 endif
1515 source "fs/Kconfig"
1517 source "arch/arm/Kconfig.debug"
1519 source "security/Kconfig"
1521 source "crypto/Kconfig"
1523 source "lib/Kconfig"