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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
813 select GENERIC_CLOCKEVENTS
814 select GENERIC_TIME
816 config PLAT_ORION
817 bool
819 config PLAT_PXA
820 bool
822 source arch/arm/mm/Kconfig
824 config IWMMXT
825 bool "Enable iWMMXt support"
826 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
827 default y if PXA27x || PXA3xx || ARCH_MMP
828 help
829 Enable support for iWMMXt context switching at run time if
830 running on a CPU that supports it.
832 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
833 config XSCALE_PMU
834 bool
835 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
836 default y
838 if !MMU
839 source "arch/arm/Kconfig-nommu"
840 endif
842 config ARM_ERRATA_411920
843 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
844 depends on CPU_V6 && !SMP
845 help
846 Invalidation of the Instruction Cache operation can
847 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
848 It does not affect the MPCore. This option enables the ARM Ltd.
849 recommended workaround.
851 config ARM_ERRATA_430973
852 bool "ARM errata: Stale prediction on replaced interworking branch"
853 depends on CPU_V7
854 help
855 This option enables the workaround for the 430973 Cortex-A8
856 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
857 interworking branch is replaced with another code sequence at the
858 same virtual address, whether due to self-modifying code or virtual
859 to physical address re-mapping, Cortex-A8 does not recover from the
860 stale interworking branch prediction. This results in Cortex-A8
861 executing the new code sequence in the incorrect ARM or Thumb state.
862 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
863 and also flushes the branch target cache at every context switch.
864 Note that setting specific bits in the ACTLR register may not be
865 available in non-secure mode.
867 config ARM_ERRATA_458693
868 bool "ARM errata: Processor deadlock when a false hazard is created"
869 depends on CPU_V7
870 help
871 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
872 erratum. For very specific sequences of memory operations, it is
873 possible for a hazard condition intended for a cache line to instead
874 be incorrectly associated with a different cache line. This false
875 hazard might then cause a processor deadlock. The workaround enables
876 the L1 caching of the NEON accesses and disables the PLD instruction
877 in the ACTLR register. Note that setting specific bits in the ACTLR
878 register may not be available in non-secure mode.
880 config ARM_ERRATA_460075
881 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
882 depends on CPU_V7
883 help
884 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
885 erratum. Any asynchronous access to the L2 cache may encounter a
886 situation in which recent store transactions to the L2 cache are lost
887 and overwritten with stale memory contents from external memory. The
888 workaround disables the write-allocate mode for the L2 cache via the
889 ACTLR register. Note that setting specific bits in the ACTLR register
890 may not be available in non-secure mode.
892 endmenu
894 source "arch/arm/common/Kconfig"
896 config FORCE_MAX_ZONEORDER
897 int
898 depends on SA1111
899 default "9"
901 menu "Bus support"
903 config ARM_AMBA
904 bool
906 config ISA
907 bool
908 help
909 Find out whether you have ISA slots on your motherboard. ISA is the
910 name of a bus system, i.e. the way the CPU talks to the other stuff
911 inside your box. Other bus systems are PCI, EISA, MicroChannel
912 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
913 newer boards don't support it. If you have ISA, say Y, otherwise N.
915 # Select ISA DMA controller support
916 config ISA_DMA
917 bool
918 select ISA_DMA_API
920 # Select ISA DMA interface
921 config ISA_DMA_API
922 bool
924 config PCI
925 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
926 help
927 Find out whether you have a PCI motherboard. PCI is the name of a
928 bus system, i.e. the way the CPU talks to the other stuff inside
929 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
930 VESA. If you have PCI, say Y, otherwise N.
932 config PCI_SYSCALL
933 def_bool PCI
935 # Select the host bridge type
936 config PCI_HOST_VIA82C505
937 bool
938 depends on PCI && ARCH_SHARK
939 default y
941 config PCI_HOST_ITE8152
942 bool
943 depends on PCI && MACH_ARMCORE
944 default y
945 select DMABOUNCE
947 source "drivers/pci/Kconfig"
949 source "drivers/pcmcia/Kconfig"
951 endmenu
953 menu "Kernel Features"
955 source "kernel/time/Kconfig"
957 config SMP
958 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
959 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
960 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
961 depends on GENERIC_CLOCKEVENTS
962 select USE_GENERIC_SMP_HELPERS
963 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4)
964 help
965 This enables support for systems with more than one CPU. If you have
966 a system with only one CPU, like most personal computers, say N. If
967 you have a system with more than one CPU, say Y.
969 If you say N here, the kernel will run on single and multiprocessor
970 machines, but will use only one CPU of a multiprocessor machine. If
971 you say Y here, the kernel will run on many, but not all, single
972 processor machines. On a single processor machine, the kernel will
973 run faster if you say N here.
975 See also <file:Documentation/i386/IO-APIC.txt>,
976 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
977 <http://www.linuxdoc.org/docs.html#howto>.
979 If you don't know what to do here, say N.
981 config HAVE_ARM_SCU
982 bool
983 depends on SMP
984 help
985 This option enables support for the ARM system coherency unit
987 config HAVE_ARM_TWD
988 bool
989 depends on SMP
990 help
991 This options enables support for the ARM timer and watchdog unit
993 choice
994 prompt "Memory split"
995 default VMSPLIT_3G
996 help
997 Select the desired split between kernel and user memory.
999 If you are not absolutely sure what you are doing, leave this
1000 option alone!
1002 config VMSPLIT_3G
1003 bool "3G/1G user/kernel split"
1004 config VMSPLIT_2G
1005 bool "2G/2G user/kernel split"
1006 config VMSPLIT_1G
1007 bool "1G/3G user/kernel split"
1008 endchoice
1010 config PAGE_OFFSET
1011 hex
1012 default 0x40000000 if VMSPLIT_1G
1013 default 0x80000000 if VMSPLIT_2G
1014 default 0xC0000000
1016 config NR_CPUS
1017 int "Maximum number of CPUs (2-32)"
1018 range 2 32
1019 depends on SMP
1020 default "4"
1022 config HOTPLUG_CPU
1023 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1024 depends on SMP && HOTPLUG && EXPERIMENTAL
1025 help
1026 Say Y here to experiment with turning CPUs off and on. CPUs
1027 can be controlled through /sys/devices/system/cpu.
1029 config LOCAL_TIMERS
1030 bool "Use local timer interrupts"
1031 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1032 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
1033 default y
1034 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4)
1035 help
1036 Enable support for local timers on SMP platforms, rather then the
1037 legacy IPI broadcast method. Local timers allows the system
1038 accounting to be spread across the timer interval, preventing a
1039 "thundering herd" at every timer tick.
1041 source kernel/Kconfig.preempt
1043 config HZ
1044 int
1045 default 128 if ARCH_L7200
1046 default 200 if ARCH_EBSA110 || ARCH_S3C2410
1047 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1048 default AT91_TIMER_HZ if ARCH_AT91
1049 default 100
1051 config THUMB2_KERNEL
1052 bool "Compile the kernel in Thumb-2 mode"
1053 depends on CPU_V7 && EXPERIMENTAL
1054 select AEABI
1055 select ARM_ASM_UNIFIED
1056 help
1057 By enabling this option, the kernel will be compiled in
1058 Thumb-2 mode. A compiler/assembler that understand the unified
1059 ARM-Thumb syntax is needed.
1061 If unsure, say N.
1063 config ARM_ASM_UNIFIED
1064 bool
1066 config AEABI
1067 bool "Use the ARM EABI to compile the kernel"
1068 help
1069 This option allows for the kernel to be compiled using the latest
1070 ARM ABI (aka EABI). This is only useful if you are using a user
1071 space environment that is also compiled with EABI.
1073 Since there are major incompatibilities between the legacy ABI and
1074 EABI, especially with regard to structure member alignment, this
1075 option also changes the kernel syscall calling convention to
1076 disambiguate both ABIs and allow for backward compatibility support
1077 (selected with CONFIG_OABI_COMPAT).
1079 To use this you need GCC version 4.0.0 or later.
1081 config OABI_COMPAT
1082 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1083 depends on AEABI && EXPERIMENTAL
1084 default y
1085 help
1086 This option preserves the old syscall interface along with the
1087 new (ARM EABI) one. It also provides a compatibility layer to
1088 intercept syscalls that have structure arguments which layout
1089 in memory differs between the legacy ABI and the new ARM EABI
1090 (only for non "thumb" binaries). This option adds a tiny
1091 overhead to all syscalls and produces a slightly larger kernel.
1092 If you know you'll be using only pure EABI user space then you
1093 can say N here. If this option is not selected and you attempt
1094 to execute a legacy ABI binary then the result will be
1095 UNPREDICTABLE (in fact it can be predicted that it won't work
1096 at all). If in doubt say Y.
1098 config ARCH_HAS_HOLES_MEMORYMODEL
1099 bool
1101 # Discontigmem is deprecated
1102 config ARCH_DISCONTIGMEM_ENABLE
1103 bool
1105 config ARCH_SPARSEMEM_ENABLE
1106 bool
1108 config ARCH_SPARSEMEM_DEFAULT
1109 def_bool ARCH_SPARSEMEM_ENABLE
1111 config ARCH_SELECT_MEMORY_MODEL
1112 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1114 config NODES_SHIFT
1115 int
1116 default "4" if ARCH_LH7A40X
1117 default "2"
1118 depends on NEED_MULTIPLE_NODES
1120 config HIGHMEM
1121 bool "High Memory Support (EXPERIMENTAL)"
1122 depends on MMU && EXPERIMENTAL
1123 help
1124 The address space of ARM processors is only 4 Gigabytes large
1125 and it has to accommodate user address space, kernel address
1126 space as well as some memory mapped IO. That means that, if you
1127 have a large amount of physical memory and/or IO, not all of the
1128 memory can be "permanently mapped" by the kernel. The physical
1129 memory that is not permanently mapped is called "high memory".
1131 Depending on the selected kernel/user memory split, minimum
1132 vmalloc space and actual amount of RAM, you may not need this
1133 option which should result in a slightly faster kernel.
1135 If unsure, say n.
1137 config HIGHPTE
1138 bool "Allocate 2nd-level pagetables from highmem"
1139 depends on HIGHMEM
1140 depends on !OUTER_CACHE
1142 source "mm/Kconfig"
1144 config LEDS
1145 bool "Timer and CPU usage LEDs"
1146 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1147 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1148 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1149 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1150 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1151 ARCH_AT91 || ARCH_DAVINCI || \
1152 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1153 help
1154 If you say Y here, the LEDs on your machine will be used
1155 to provide useful information about your current system status.
1157 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1158 be able to select which LEDs are active using the options below. If
1159 you are compiling a kernel for the EBSA-110 or the LART however, the
1160 red LED will simply flash regularly to indicate that the system is
1161 still functional. It is safe to say Y here if you have a CATS
1162 system, but the driver will do nothing.
1164 config LEDS_TIMER
1165 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1166 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1167 || MACH_OMAP_PERSEUS2
1168 depends on LEDS
1169 depends on !GENERIC_CLOCKEVENTS
1170 default y if ARCH_EBSA110
1171 help
1172 If you say Y here, one of the system LEDs (the green one on the
1173 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1174 will flash regularly to indicate that the system is still
1175 operational. This is mainly useful to kernel hackers who are
1176 debugging unstable kernels.
1178 The LART uses the same LED for both Timer LED and CPU usage LED
1179 functions. You may choose to use both, but the Timer LED function
1180 will overrule the CPU usage LED.
1182 config LEDS_CPU
1183 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1184 !ARCH_OMAP) \
1185 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1186 || MACH_OMAP_PERSEUS2
1187 depends on LEDS
1188 help
1189 If you say Y here, the red LED will be used to give a good real
1190 time indication of CPU usage, by lighting whenever the idle task
1191 is not currently executing.
1193 The LART uses the same LED for both Timer LED and CPU usage LED
1194 functions. You may choose to use both, but the Timer LED function
1195 will overrule the CPU usage LED.
1197 config ALIGNMENT_TRAP
1198 bool
1199 depends on CPU_CP15_MMU
1200 default y if !ARCH_EBSA110
1201 help
1202 ARM processors cannot fetch/store information which is not
1203 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1204 address divisible by 4. On 32-bit ARM processors, these non-aligned
1205 fetch/store instructions will be emulated in software if you say
1206 here, which has a severe performance impact. This is necessary for
1207 correct operation of some network protocols. With an IP-only
1208 configuration it is safe to say N, otherwise say Y.
1210 config UACCESS_WITH_MEMCPY
1211 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1212 depends on MMU && EXPERIMENTAL
1213 default y if CPU_FEROCEON
1214 help
1215 Implement faster copy_to_user and clear_user methods for CPU
1216 cores where a 8-word STM instruction give significantly higher
1217 memory write throughput than a sequence of individual 32bit stores.
1219 A possible side effect is a slight increase in scheduling latency
1220 between threads sharing the same address space if they invoke
1221 such copy operations with large buffers.
1223 However, if the CPU data cache is using a write-allocate mode,
1224 this option is unlikely to provide any performance gain.
1226 endmenu
1228 menu "Boot options"
1230 # Compressed boot loader in ROM. Yes, we really want to ask about
1231 # TEXT and BSS so we preserve their values in the config files.
1232 config ZBOOT_ROM_TEXT
1233 hex "Compressed ROM boot loader base address"
1234 default "0"
1235 help
1236 The physical address at which the ROM-able zImage is to be
1237 placed in the target. Platforms which normally make use of
1238 ROM-able zImage formats normally set this to a suitable
1239 value in their defconfig file.
1241 If ZBOOT_ROM is not enabled, this has no effect.
1243 config ZBOOT_ROM_BSS
1244 hex "Compressed ROM boot loader BSS address"
1245 default "0"
1246 help
1247 The base address of an area of read/write memory in the target
1248 for the ROM-able zImage which must be available while the
1249 decompressor is running. It must be large enough to hold the
1250 entire decompressed kernel plus an additional 128 KiB.
1251 Platforms which normally make use of ROM-able zImage formats
1252 normally set this to a suitable value in their defconfig file.
1254 If ZBOOT_ROM is not enabled, this has no effect.
1256 config ZBOOT_ROM
1257 bool "Compressed boot loader in ROM/flash"
1258 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1259 help
1260 Say Y here if you intend to execute your compressed kernel image
1261 (zImage) directly from ROM or flash. If unsure, say N.
1263 config CMDLINE
1264 string "Default kernel command string"
1265 default ""
1266 help
1267 On some architectures (EBSA110 and CATS), there is currently no way
1268 for the boot loader to pass arguments to the kernel. For these
1269 architectures, you should supply some command-line options at build
1270 time by entering them here. As a minimum, you should specify the
1271 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1273 config XIP_KERNEL
1274 bool "Kernel Execute-In-Place from ROM"
1275 depends on !ZBOOT_ROM
1276 help
1277 Execute-In-Place allows the kernel to run from non-volatile storage
1278 directly addressable by the CPU, such as NOR flash. This saves RAM
1279 space since the text section of the kernel is not loaded from flash
1280 to RAM. Read-write sections, such as the data section and stack,
1281 are still copied to RAM. The XIP kernel is not compressed since
1282 it has to run directly from flash, so it will take more space to
1283 store it. The flash address used to link the kernel object files,
1284 and for storing it, is configuration dependent. Therefore, if you
1285 say Y here, you must know the proper physical address where to
1286 store the kernel image depending on your own flash memory usage.
1288 Also note that the make target becomes "make xipImage" rather than
1289 "make zImage" or "make Image". The final kernel binary to put in
1290 ROM memory will be arch/arm/boot/xipImage.
1292 If unsure, say N.
1294 config XIP_PHYS_ADDR
1295 hex "XIP Kernel Physical Location"
1296 depends on XIP_KERNEL
1297 default "0x00080000"
1298 help
1299 This is the physical address in your flash memory the kernel will
1300 be linked for and stored to. This address is dependent on your
1301 own flash usage.
1303 config KEXEC
1304 bool "Kexec system call (EXPERIMENTAL)"
1305 depends on EXPERIMENTAL
1306 help
1307 kexec is a system call that implements the ability to shutdown your
1308 current kernel, and to start another kernel. It is like a reboot
1309 but it is independent of the system firmware. And like a reboot
1310 you can start any kernel with it, not just Linux.
1312 It is an ongoing process to be certain the hardware in a machine
1313 is properly shutdown, so do not be surprised if this code does not
1314 initially work for you. It may help to enable device hotplugging
1315 support.
1317 config ATAGS_PROC
1318 bool "Export atags in procfs"
1319 depends on KEXEC
1320 default y
1321 help
1322 Should the atags used to boot the kernel be exported in an "atags"
1323 file in procfs. Useful with kexec.
1325 endmenu
1327 menu "CPU Power Management"
1329 if ARCH_HAS_CPUFREQ
1331 source "drivers/cpufreq/Kconfig"
1333 config CPU_FREQ_SA1100
1334 bool
1335 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1336 default y
1338 config CPU_FREQ_SA1110
1339 bool
1340 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1341 default y
1343 config CPU_FREQ_INTEGRATOR
1344 tristate "CPUfreq driver for ARM Integrator CPUs"
1345 depends on ARCH_INTEGRATOR && CPU_FREQ
1346 default y
1347 help
1348 This enables the CPUfreq driver for ARM Integrator CPUs.
1350 For details, take a look at <file:Documentation/cpu-freq>.
1352 If in doubt, say Y.
1354 config CPU_FREQ_PXA
1355 bool
1356 depends on CPU_FREQ && ARCH_PXA && PXA25x
1357 default y
1358 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1360 config CPU_FREQ_S3C64XX
1361 bool "CPUfreq support for Samsung S3C64XX CPUs"
1362 depends on CPU_FREQ && CPU_S3C6410
1364 config CPU_FREQ_S3C
1365 bool
1366 help
1367 Internal configuration node for common cpufreq on Samsung SoC
1369 config CPU_FREQ_S3C24XX
1370 bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1371 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1372 select CPU_FREQ_S3C
1373 help
1374 This enables the CPUfreq driver for the Samsung S3C24XX family
1375 of CPUs.
1377 For details, take a look at <file:Documentation/cpu-freq>.
1379 If in doubt, say N.
1381 config CPU_FREQ_S3C24XX_PLL
1382 bool "Support CPUfreq changing of PLL frequency"
1383 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1384 help
1385 Compile in support for changing the PLL frequency from the
1386 S3C24XX series CPUfreq driver. The PLL takes time to settle
1387 after a frequency change, so by default it is not enabled.
1389 This also means that the PLL tables for the selected CPU(s) will
1390 be built which may increase the size of the kernel image.
1392 config CPU_FREQ_S3C24XX_DEBUG
1393 bool "Debug CPUfreq Samsung driver core"
1394 depends on CPU_FREQ_S3C24XX
1395 help
1396 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1398 config CPU_FREQ_S3C24XX_IODEBUG
1399 bool "Debug CPUfreq Samsung driver IO timing"
1400 depends on CPU_FREQ_S3C24XX
1401 help
1402 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1404 config CPU_FREQ_S3C24XX_DEBUGFS
1405 bool "Export debugfs for CPUFreq"
1406 depends on CPU_FREQ_S3C24XX && DEBUG_FS
1407 help
1408 Export status information via debugfs.
1410 endif
1412 source "drivers/cpuidle/Kconfig"
1414 endmenu
1416 menu "Floating point emulation"
1418 comment "At least one emulation must be selected"
1420 config FPE_NWFPE
1421 bool "NWFPE math emulation"
1422 depends on !AEABI || OABI_COMPAT
1423 ---help---
1424 Say Y to include the NWFPE floating point emulator in the kernel.
1425 This is necessary to run most binaries. Linux does not currently
1426 support floating point hardware so you need to say Y here even if
1427 your machine has an FPA or floating point co-processor podule.
1429 You may say N here if you are going to load the Acorn FPEmulator
1430 early in the bootup.
1432 config FPE_NWFPE_XP
1433 bool "Support extended precision"
1434 depends on FPE_NWFPE
1435 help
1436 Say Y to include 80-bit support in the kernel floating-point
1437 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1438 Note that gcc does not generate 80-bit operations by default,
1439 so in most cases this option only enlarges the size of the
1440 floating point emulator without any good reason.
1442 You almost surely want to say N here.
1444 config FPE_FASTFPE
1445 bool "FastFPE math emulation (EXPERIMENTAL)"
1446 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1447 ---help---
1448 Say Y here to include the FAST floating point emulator in the kernel.
1449 This is an experimental much faster emulator which now also has full
1450 precision for the mantissa. It does not support any exceptions.
1451 It is very simple, and approximately 3-6 times faster than NWFPE.
1453 It should be sufficient for most programs. It may be not suitable
1454 for scientific calculations, but you have to check this for yourself.
1455 If you do not feel you need a faster FP emulation you should better
1456 choose NWFPE.
1458 config VFP
1459 bool "VFP-format floating point maths"
1460 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1461 help
1462 Say Y to include VFP support code in the kernel. This is needed
1463 if your hardware includes a VFP unit.
1465 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1466 release notes and additional status information.
1468 Say N if your target does not have VFP hardware.
1470 config VFPv3
1471 bool
1472 depends on VFP
1473 default y if CPU_V7
1475 config NEON
1476 bool "Advanced SIMD (NEON) Extension support"
1477 depends on VFPv3 && CPU_V7
1478 help
1479 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1480 Extension.
1482 endmenu
1484 menu "Userspace binary formats"
1486 source "fs/Kconfig.binfmt"
1488 config ARTHUR
1489 tristate "RISC OS personality"
1490 depends on !AEABI
1491 help
1492 Say Y here to include the kernel code necessary if you want to run
1493 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1494 experimental; if this sounds frightening, say N and sleep in peace.
1495 You can also say M here to compile this support as a module (which
1496 will be called arthur).
1498 endmenu
1500 menu "Power management options"
1502 source "kernel/power/Kconfig"
1504 config ARCH_SUSPEND_POSSIBLE
1505 def_bool y
1507 endmenu
1509 source "net/Kconfig"
1511 source "drivers/Kconfig"
1513 source "fs/Kconfig"
1515 source "arch/arm/Kconfig.debug"
1517 source "security/Kconfig"
1519 source "crypto/Kconfig"
1521 source "lib/Kconfig"