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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 config ARM_ERRATA_720789
891 bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
892 depends on CPU_V7 && SMP
893 help
894 This option enables the workaround for the 720789 Cortex-A9 (prior to
895 r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
896 broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
897 As a consequence of this erratum, some TLB entries which should be
898 invalidated are not, resulting in an incoherency in the system page
899 tables. The workaround changes the TLB flushing routines to invalidate
900 entries regardless of the ASID.
902 endmenu
904 source "arch/arm/common/Kconfig"
906 config FORCE_MAX_ZONEORDER
907 int
908 depends on SA1111
909 default "9"
911 menu "Bus support"
913 config ARM_AMBA
914 bool
916 config ISA
917 bool
918 help
919 Find out whether you have ISA slots on your motherboard. ISA is the
920 name of a bus system, i.e. the way the CPU talks to the other stuff
921 inside your box. Other bus systems are PCI, EISA, MicroChannel
922 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
923 newer boards don't support it. If you have ISA, say Y, otherwise N.
925 # Select ISA DMA controller support
926 config ISA_DMA
927 bool
928 select ISA_DMA_API
930 # Select ISA DMA interface
931 config ISA_DMA_API
932 bool
934 config PCI
935 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
936 help
937 Find out whether you have a PCI motherboard. PCI is the name of a
938 bus system, i.e. the way the CPU talks to the other stuff inside
939 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
940 VESA. If you have PCI, say Y, otherwise N.
942 config PCI_SYSCALL
943 def_bool PCI
945 # Select the host bridge type
946 config PCI_HOST_VIA82C505
947 bool
948 depends on PCI && ARCH_SHARK
949 default y
951 config PCI_HOST_ITE8152
952 bool
953 depends on PCI && MACH_ARMCORE
954 default y
955 select DMABOUNCE
957 source "drivers/pci/Kconfig"
959 source "drivers/pcmcia/Kconfig"
961 endmenu
963 menu "Kernel Features"
965 source "kernel/time/Kconfig"
967 config SMP
968 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
969 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
970 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
971 depends on GENERIC_CLOCKEVENTS
972 select USE_GENERIC_SMP_HELPERS
973 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4)
974 help
975 This enables support for systems with more than one CPU. If you have
976 a system with only one CPU, like most personal computers, say N. If
977 you have a system with more than one CPU, say Y.
979 If you say N here, the kernel will run on single and multiprocessor
980 machines, but will use only one CPU of a multiprocessor machine. If
981 you say Y here, the kernel will run on many, but not all, single
982 processor machines. On a single processor machine, the kernel will
983 run faster if you say N here.
985 See also <file:Documentation/i386/IO-APIC.txt>,
986 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
987 <http://www.linuxdoc.org/docs.html#howto>.
989 If you don't know what to do here, say N.
991 config HAVE_ARM_SCU
992 bool
993 depends on SMP
994 help
995 This option enables support for the ARM system coherency unit
997 config HAVE_ARM_TWD
998 bool
999 depends on SMP
1000 help
1001 This options enables support for the ARM timer and watchdog unit
1003 choice
1004 prompt "Memory split"
1005 default VMSPLIT_3G
1006 help
1007 Select the desired split between kernel and user memory.
1009 If you are not absolutely sure what you are doing, leave this
1010 option alone!
1012 config VMSPLIT_3G
1013 bool "3G/1G user/kernel split"
1014 config VMSPLIT_2G
1015 bool "2G/2G user/kernel split"
1016 config VMSPLIT_1G
1017 bool "1G/3G user/kernel split"
1018 endchoice
1020 config PAGE_OFFSET
1021 hex
1022 default 0x40000000 if VMSPLIT_1G
1023 default 0x80000000 if VMSPLIT_2G
1024 default 0xC0000000
1026 config NR_CPUS
1027 int "Maximum number of CPUs (2-32)"
1028 range 2 32
1029 depends on SMP
1030 default "4"
1032 config HOTPLUG_CPU
1033 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1034 depends on SMP && HOTPLUG && EXPERIMENTAL
1035 help
1036 Say Y here to experiment with turning CPUs off and on. CPUs
1037 can be controlled through /sys/devices/system/cpu.
1039 config LOCAL_TIMERS
1040 bool "Use local timer interrupts"
1041 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1042 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
1043 default y
1044 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4)
1045 help
1046 Enable support for local timers on SMP platforms, rather then the
1047 legacy IPI broadcast method. Local timers allows the system
1048 accounting to be spread across the timer interval, preventing a
1049 "thundering herd" at every timer tick.
1051 source kernel/Kconfig.preempt
1053 config HZ
1054 int
1055 default 128 if ARCH_L7200
1056 default 200 if ARCH_EBSA110 || ARCH_S3C2410
1057 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1058 default AT91_TIMER_HZ if ARCH_AT91
1059 default 100
1061 config THUMB2_KERNEL
1062 bool "Compile the kernel in Thumb-2 mode"
1063 depends on CPU_V7 && EXPERIMENTAL
1064 select AEABI
1065 select ARM_ASM_UNIFIED
1066 help
1067 By enabling this option, the kernel will be compiled in
1068 Thumb-2 mode. A compiler/assembler that understand the unified
1069 ARM-Thumb syntax is needed.
1071 If unsure, say N.
1073 config ARM_ASM_UNIFIED
1074 bool
1076 config AEABI
1077 bool "Use the ARM EABI to compile the kernel"
1078 help
1079 This option allows for the kernel to be compiled using the latest
1080 ARM ABI (aka EABI). This is only useful if you are using a user
1081 space environment that is also compiled with EABI.
1083 Since there are major incompatibilities between the legacy ABI and
1084 EABI, especially with regard to structure member alignment, this
1085 option also changes the kernel syscall calling convention to
1086 disambiguate both ABIs and allow for backward compatibility support
1087 (selected with CONFIG_OABI_COMPAT).
1089 To use this you need GCC version 4.0.0 or later.
1091 config OABI_COMPAT
1092 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1093 depends on AEABI && EXPERIMENTAL
1094 default y
1095 help
1096 This option preserves the old syscall interface along with the
1097 new (ARM EABI) one. It also provides a compatibility layer to
1098 intercept syscalls that have structure arguments which layout
1099 in memory differs between the legacy ABI and the new ARM EABI
1100 (only for non "thumb" binaries). This option adds a tiny
1101 overhead to all syscalls and produces a slightly larger kernel.
1102 If you know you'll be using only pure EABI user space then you
1103 can say N here. If this option is not selected and you attempt
1104 to execute a legacy ABI binary then the result will be
1105 UNPREDICTABLE (in fact it can be predicted that it won't work
1106 at all). If in doubt say Y.
1108 config ARCH_HAS_HOLES_MEMORYMODEL
1109 bool
1111 # Discontigmem is deprecated
1112 config ARCH_DISCONTIGMEM_ENABLE
1113 bool
1115 config ARCH_SPARSEMEM_ENABLE
1116 bool
1118 config ARCH_SPARSEMEM_DEFAULT
1119 def_bool ARCH_SPARSEMEM_ENABLE
1121 config ARCH_SELECT_MEMORY_MODEL
1122 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1124 config NODES_SHIFT
1125 int
1126 default "4" if ARCH_LH7A40X
1127 default "2"
1128 depends on NEED_MULTIPLE_NODES
1130 config HIGHMEM
1131 bool "High Memory Support (EXPERIMENTAL)"
1132 depends on MMU && EXPERIMENTAL
1133 help
1134 The address space of ARM processors is only 4 Gigabytes large
1135 and it has to accommodate user address space, kernel address
1136 space as well as some memory mapped IO. That means that, if you
1137 have a large amount of physical memory and/or IO, not all of the
1138 memory can be "permanently mapped" by the kernel. The physical
1139 memory that is not permanently mapped is called "high memory".
1141 Depending on the selected kernel/user memory split, minimum
1142 vmalloc space and actual amount of RAM, you may not need this
1143 option which should result in a slightly faster kernel.
1145 If unsure, say n.
1147 config HIGHPTE
1148 bool "Allocate 2nd-level pagetables from highmem"
1149 depends on HIGHMEM
1150 depends on !OUTER_CACHE
1152 source "mm/Kconfig"
1154 config LEDS
1155 bool "Timer and CPU usage LEDs"
1156 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1157 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1158 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1159 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1160 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1161 ARCH_AT91 || ARCH_DAVINCI || \
1162 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1163 help
1164 If you say Y here, the LEDs on your machine will be used
1165 to provide useful information about your current system status.
1167 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1168 be able to select which LEDs are active using the options below. If
1169 you are compiling a kernel for the EBSA-110 or the LART however, the
1170 red LED will simply flash regularly to indicate that the system is
1171 still functional. It is safe to say Y here if you have a CATS
1172 system, but the driver will do nothing.
1174 config LEDS_TIMER
1175 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1176 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1177 || MACH_OMAP_PERSEUS2
1178 depends on LEDS
1179 depends on !GENERIC_CLOCKEVENTS
1180 default y if ARCH_EBSA110
1181 help
1182 If you say Y here, one of the system LEDs (the green one on the
1183 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1184 will flash regularly to indicate that the system is still
1185 operational. This is mainly useful to kernel hackers who are
1186 debugging unstable kernels.
1188 The LART uses the same LED for both Timer LED and CPU usage LED
1189 functions. You may choose to use both, but the Timer LED function
1190 will overrule the CPU usage LED.
1192 config LEDS_CPU
1193 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1194 !ARCH_OMAP) \
1195 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1196 || MACH_OMAP_PERSEUS2
1197 depends on LEDS
1198 help
1199 If you say Y here, the red LED will be used to give a good real
1200 time indication of CPU usage, by lighting whenever the idle task
1201 is not currently executing.
1203 The LART uses the same LED for both Timer LED and CPU usage LED
1204 functions. You may choose to use both, but the Timer LED function
1205 will overrule the CPU usage LED.
1207 config ALIGNMENT_TRAP
1208 bool
1209 depends on CPU_CP15_MMU
1210 default y if !ARCH_EBSA110
1211 help
1212 ARM processors cannot fetch/store information which is not
1213 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1214 address divisible by 4. On 32-bit ARM processors, these non-aligned
1215 fetch/store instructions will be emulated in software if you say
1216 here, which has a severe performance impact. This is necessary for
1217 correct operation of some network protocols. With an IP-only
1218 configuration it is safe to say N, otherwise say Y.
1220 config UACCESS_WITH_MEMCPY
1221 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1222 depends on MMU && EXPERIMENTAL
1223 default y if CPU_FEROCEON
1224 help
1225 Implement faster copy_to_user and clear_user methods for CPU
1226 cores where a 8-word STM instruction give significantly higher
1227 memory write throughput than a sequence of individual 32bit stores.
1229 A possible side effect is a slight increase in scheduling latency
1230 between threads sharing the same address space if they invoke
1231 such copy operations with large buffers.
1233 However, if the CPU data cache is using a write-allocate mode,
1234 this option is unlikely to provide any performance gain.
1236 endmenu
1238 menu "Boot options"
1240 # Compressed boot loader in ROM. Yes, we really want to ask about
1241 # TEXT and BSS so we preserve their values in the config files.
1242 config ZBOOT_ROM_TEXT
1243 hex "Compressed ROM boot loader base address"
1244 default "0"
1245 help
1246 The physical address at which the ROM-able zImage is to be
1247 placed in the target. Platforms which normally make use of
1248 ROM-able zImage formats normally set this to a suitable
1249 value in their defconfig file.
1251 If ZBOOT_ROM is not enabled, this has no effect.
1253 config ZBOOT_ROM_BSS
1254 hex "Compressed ROM boot loader BSS address"
1255 default "0"
1256 help
1257 The base address of an area of read/write memory in the target
1258 for the ROM-able zImage which must be available while the
1259 decompressor is running. It must be large enough to hold the
1260 entire decompressed kernel plus an additional 128 KiB.
1261 Platforms which normally make use of ROM-able zImage formats
1262 normally set this to a suitable value in their defconfig file.
1264 If ZBOOT_ROM is not enabled, this has no effect.
1266 config ZBOOT_ROM
1267 bool "Compressed boot loader in ROM/flash"
1268 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1269 help
1270 Say Y here if you intend to execute your compressed kernel image
1271 (zImage) directly from ROM or flash. If unsure, say N.
1273 config CMDLINE
1274 string "Default kernel command string"
1275 default ""
1276 help
1277 On some architectures (EBSA110 and CATS), there is currently no way
1278 for the boot loader to pass arguments to the kernel. For these
1279 architectures, you should supply some command-line options at build
1280 time by entering them here. As a minimum, you should specify the
1281 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1283 config XIP_KERNEL
1284 bool "Kernel Execute-In-Place from ROM"
1285 depends on !ZBOOT_ROM
1286 help
1287 Execute-In-Place allows the kernel to run from non-volatile storage
1288 directly addressable by the CPU, such as NOR flash. This saves RAM
1289 space since the text section of the kernel is not loaded from flash
1290 to RAM. Read-write sections, such as the data section and stack,
1291 are still copied to RAM. The XIP kernel is not compressed since
1292 it has to run directly from flash, so it will take more space to
1293 store it. The flash address used to link the kernel object files,
1294 and for storing it, is configuration dependent. Therefore, if you
1295 say Y here, you must know the proper physical address where to
1296 store the kernel image depending on your own flash memory usage.
1298 Also note that the make target becomes "make xipImage" rather than
1299 "make zImage" or "make Image". The final kernel binary to put in
1300 ROM memory will be arch/arm/boot/xipImage.
1302 If unsure, say N.
1304 config XIP_PHYS_ADDR
1305 hex "XIP Kernel Physical Location"
1306 depends on XIP_KERNEL
1307 default "0x00080000"
1308 help
1309 This is the physical address in your flash memory the kernel will
1310 be linked for and stored to. This address is dependent on your
1311 own flash usage.
1313 config KEXEC
1314 bool "Kexec system call (EXPERIMENTAL)"
1315 depends on EXPERIMENTAL
1316 help
1317 kexec is a system call that implements the ability to shutdown your
1318 current kernel, and to start another kernel. It is like a reboot
1319 but it is independent of the system firmware. And like a reboot
1320 you can start any kernel with it, not just Linux.
1322 It is an ongoing process to be certain the hardware in a machine
1323 is properly shutdown, so do not be surprised if this code does not
1324 initially work for you. It may help to enable device hotplugging
1325 support.
1327 config ATAGS_PROC
1328 bool "Export atags in procfs"
1329 depends on KEXEC
1330 default y
1331 help
1332 Should the atags used to boot the kernel be exported in an "atags"
1333 file in procfs. Useful with kexec.
1335 endmenu
1337 menu "CPU Power Management"
1339 if ARCH_HAS_CPUFREQ
1341 source "drivers/cpufreq/Kconfig"
1343 config CPU_FREQ_SA1100
1344 bool
1345 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1346 default y
1348 config CPU_FREQ_SA1110
1349 bool
1350 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1351 default y
1353 config CPU_FREQ_INTEGRATOR
1354 tristate "CPUfreq driver for ARM Integrator CPUs"
1355 depends on ARCH_INTEGRATOR && CPU_FREQ
1356 default y
1357 help
1358 This enables the CPUfreq driver for ARM Integrator CPUs.
1360 For details, take a look at <file:Documentation/cpu-freq>.
1362 If in doubt, say Y.
1364 config CPU_FREQ_PXA
1365 bool
1366 depends on CPU_FREQ && ARCH_PXA && PXA25x
1367 default y
1368 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1370 config CPU_FREQ_S3C64XX
1371 bool "CPUfreq support for Samsung S3C64XX CPUs"
1372 depends on CPU_FREQ && CPU_S3C6410
1374 config CPU_FREQ_S3C
1375 bool
1376 help
1377 Internal configuration node for common cpufreq on Samsung SoC
1379 config CPU_FREQ_S3C24XX
1380 bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1381 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1382 select CPU_FREQ_S3C
1383 help
1384 This enables the CPUfreq driver for the Samsung S3C24XX family
1385 of CPUs.
1387 For details, take a look at <file:Documentation/cpu-freq>.
1389 If in doubt, say N.
1391 config CPU_FREQ_S3C24XX_PLL
1392 bool "Support CPUfreq changing of PLL frequency"
1393 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1394 help
1395 Compile in support for changing the PLL frequency from the
1396 S3C24XX series CPUfreq driver. The PLL takes time to settle
1397 after a frequency change, so by default it is not enabled.
1399 This also means that the PLL tables for the selected CPU(s) will
1400 be built which may increase the size of the kernel image.
1402 config CPU_FREQ_S3C24XX_DEBUG
1403 bool "Debug CPUfreq Samsung driver core"
1404 depends on CPU_FREQ_S3C24XX
1405 help
1406 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1408 config CPU_FREQ_S3C24XX_IODEBUG
1409 bool "Debug CPUfreq Samsung driver IO timing"
1410 depends on CPU_FREQ_S3C24XX
1411 help
1412 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1414 config CPU_FREQ_S3C24XX_DEBUGFS
1415 bool "Export debugfs for CPUFreq"
1416 depends on CPU_FREQ_S3C24XX && DEBUG_FS
1417 help
1418 Export status information via debugfs.
1420 endif
1422 source "drivers/cpuidle/Kconfig"
1424 endmenu
1426 menu "Floating point emulation"
1428 comment "At least one emulation must be selected"
1430 config FPE_NWFPE
1431 bool "NWFPE math emulation"
1432 depends on !AEABI || OABI_COMPAT
1433 ---help---
1434 Say Y to include the NWFPE floating point emulator in the kernel.
1435 This is necessary to run most binaries. Linux does not currently
1436 support floating point hardware so you need to say Y here even if
1437 your machine has an FPA or floating point co-processor podule.
1439 You may say N here if you are going to load the Acorn FPEmulator
1440 early in the bootup.
1442 config FPE_NWFPE_XP
1443 bool "Support extended precision"
1444 depends on FPE_NWFPE
1445 help
1446 Say Y to include 80-bit support in the kernel floating-point
1447 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1448 Note that gcc does not generate 80-bit operations by default,
1449 so in most cases this option only enlarges the size of the
1450 floating point emulator without any good reason.
1452 You almost surely want to say N here.
1454 config FPE_FASTFPE
1455 bool "FastFPE math emulation (EXPERIMENTAL)"
1456 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1457 ---help---
1458 Say Y here to include the FAST floating point emulator in the kernel.
1459 This is an experimental much faster emulator which now also has full
1460 precision for the mantissa. It does not support any exceptions.
1461 It is very simple, and approximately 3-6 times faster than NWFPE.
1463 It should be sufficient for most programs. It may be not suitable
1464 for scientific calculations, but you have to check this for yourself.
1465 If you do not feel you need a faster FP emulation you should better
1466 choose NWFPE.
1468 config VFP
1469 bool "VFP-format floating point maths"
1470 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1471 help
1472 Say Y to include VFP support code in the kernel. This is needed
1473 if your hardware includes a VFP unit.
1475 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1476 release notes and additional status information.
1478 Say N if your target does not have VFP hardware.
1480 config VFPv3
1481 bool
1482 depends on VFP
1483 default y if CPU_V7
1485 config NEON
1486 bool "Advanced SIMD (NEON) Extension support"
1487 depends on VFPv3 && CPU_V7
1488 help
1489 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1490 Extension.
1492 endmenu
1494 menu "Userspace binary formats"
1496 source "fs/Kconfig.binfmt"
1498 config ARTHUR
1499 tristate "RISC OS personality"
1500 depends on !AEABI
1501 help
1502 Say Y here to include the kernel code necessary if you want to run
1503 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1504 experimental; if this sounds frightening, say N and sleep in peace.
1505 You can also say M here to compile this support as a module (which
1506 will be called arthur).
1508 endmenu
1510 menu "Power management options"
1512 source "kernel/power/Kconfig"
1514 config ARCH_SUSPEND_POSSIBLE
1515 def_bool y
1517 endmenu
1519 source "net/Kconfig"
1521 source "drivers/Kconfig"
1523 source "fs/Kconfig"
1525 source "arch/arm/Kconfig.debug"
1527 source "security/Kconfig"
1529 source "crypto/Kconfig"
1531 source "lib/Kconfig"