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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 NO_IOPORT
50 bool
52 config EISA
53 bool
54 ---help---
55 The Extended Industry Standard Architecture (EISA) bus was
56 developed as an open alternative to the IBM MicroChannel bus.
58 The EISA bus provided some of the features of the IBM MicroChannel
59 bus while maintaining backward compatibility with cards made for
60 the older ISA bus. The EISA bus saw limited use between 1988 and
61 1995 when it was made obsolete by the PCI bus.
63 Say Y here if you are building a kernel for an EISA-based machine.
65 Otherwise, say N.
67 config SBUS
68 bool
70 config MCA
71 bool
72 help
73 MicroChannel Architecture is found in some IBM PS/2 machines and
74 laptops. It is a bus system similar to PCI or ISA. See
75 <file:Documentation/mca.txt> (and especially the web page given
76 there) before attempting to build an MCA bus kernel.
78 config GENERIC_HARDIRQS
79 bool
80 default y
82 config STACKTRACE_SUPPORT
83 bool
84 default y
86 config HAVE_LATENCYTOP_SUPPORT
87 bool
88 depends on !SMP
89 default y
91 config LOCKDEP_SUPPORT
92 bool
93 default y
95 config TRACE_IRQFLAGS_SUPPORT
96 bool
97 default y
99 config HARDIRQS_SW_RESEND
100 bool
101 default y
103 config GENERIC_IRQ_PROBE
104 bool
105 default y
107 config GENERIC_LOCKBREAK
108 bool
109 default y
110 depends on SMP && PREEMPT
112 config RWSEM_GENERIC_SPINLOCK
113 bool
114 default y
116 config RWSEM_XCHGADD_ALGORITHM
117 bool
119 config ARCH_HAS_ILOG2_U32
120 bool
122 config ARCH_HAS_ILOG2_U64
123 bool
125 config ARCH_HAS_CPUFREQ
126 bool
127 help
128 Internal node to signify that the ARCH has CPUFREQ support
129 and that the relevant menu configurations are displayed for
130 it.
132 config GENERIC_HWEIGHT
133 bool
134 default y
136 config GENERIC_CALIBRATE_DELAY
137 bool
138 default y
140 config ARCH_MAY_HAVE_PC_FDC
141 bool
143 config ZONE_DMA
144 bool
146 config GENERIC_ISA_DMA
147 bool
149 config FIQ
150 bool
152 config ARCH_MTD_XIP
153 bool
155 config GENERIC_HARDIRQS_NO__DO_IRQ
156 def_bool y
158 if OPROFILE
160 config OPROFILE_ARMV6
161 def_bool y
162 depends on CPU_V6 && !SMP
163 select OPROFILE_ARM11_CORE
165 config OPROFILE_MPCORE
166 def_bool y
167 depends on CPU_V6 && SMP
168 select OPROFILE_ARM11_CORE
170 config OPROFILE_ARM11_CORE
171 bool
173 config OPROFILE_ARMV7
174 def_bool y
175 depends on CPU_V7 && !SMP
176 bool
178 endif
180 config VECTORS_BASE
181 hex
182 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
183 default DRAM_BASE if REMAP_VECTORS_TO_RAM
184 default 0x00000000
185 help
186 The base address of exception vectors.
188 source "init/Kconfig"
190 source "kernel/Kconfig.freezer"
192 menu "System Type"
194 config MMU
195 bool "MMU-based Paged Memory Management Support"
196 default y
197 help
198 Select if you want MMU-based virtualised addressing space
199 support by paged memory management. If unsure, say 'Y'.
201 choice
202 prompt "ARM system type"
203 default ARCH_VERSATILE
205 config ARCH_AAEC2000
206 bool "Agilent AAEC-2000 based"
207 select CPU_ARM920T
208 select ARM_AMBA
209 select HAVE_CLK
210 help
211 This enables support for systems based on the Agilent AAEC-2000
213 config ARCH_INTEGRATOR
214 bool "ARM Ltd. Integrator family"
215 select ARM_AMBA
216 select ARCH_HAS_CPUFREQ
217 select HAVE_CLK
218 select COMMON_CLKDEV
219 select ICST525
220 help
221 Support for ARM's Integrator platform.
223 config ARCH_REALVIEW
224 bool "ARM Ltd. RealView family"
225 select ARM_AMBA
226 select HAVE_CLK
227 select COMMON_CLKDEV
228 select ICST307
229 select GENERIC_TIME
230 select GENERIC_CLOCKEVENTS
231 select ARCH_WANT_OPTIONAL_GPIOLIB
232 help
233 This enables support for ARM Ltd RealView boards.
235 config ARCH_VERSATILE
236 bool "ARM Ltd. Versatile family"
237 select ARM_AMBA
238 select ARM_VIC
239 select HAVE_CLK
240 select COMMON_CLKDEV
241 select ICST307
242 select GENERIC_TIME
243 select GENERIC_CLOCKEVENTS
244 select ARCH_WANT_OPTIONAL_GPIOLIB
245 help
246 This enables support for ARM Ltd Versatile board.
248 config ARCH_AT91
249 bool "Atmel AT91"
250 select GENERIC_GPIO
251 select ARCH_REQUIRE_GPIOLIB
252 select HAVE_CLK
253 help
254 This enables support for systems based on the Atmel AT91RM9200,
255 AT91SAM9 and AT91CAP9 processors.
257 config ARCH_CLPS711X
258 bool "Cirrus Logic CLPS711x/EP721x-based"
259 select CPU_ARM720T
260 help
261 Support for Cirrus Logic 711x/721x based boards.
263 config ARCH_GEMINI
264 bool "Cortina Systems Gemini"
265 select CPU_FA526
266 select GENERIC_GPIO
267 select ARCH_REQUIRE_GPIOLIB
268 help
269 Support for the Cortina Systems Gemini family SoCs
271 config ARCH_EBSA110
272 bool "EBSA-110"
273 select CPU_SA110
274 select ISA
275 select NO_IOPORT
276 help
277 This is an evaluation board for the StrongARM processor available
278 from Digital. It has limited hardware on-board, including an
279 Ethernet interface, two PCMCIA sockets, two serial ports and a
280 parallel port.
282 config ARCH_EP93XX
283 bool "EP93xx-based"
284 select CPU_ARM920T
285 select ARM_AMBA
286 select ARM_VIC
287 select GENERIC_GPIO
288 select HAVE_CLK
289 select COMMON_CLKDEV
290 select ARCH_REQUIRE_GPIOLIB
291 select ARCH_HAS_HOLES_MEMORYMODEL
292 help
293 This enables support for the Cirrus EP93xx series of CPUs.
295 config ARCH_FOOTBRIDGE
296 bool "FootBridge"
297 select CPU_SA110
298 select FOOTBRIDGE
299 help
300 Support for systems based on the DC21285 companion chip
301 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
303 config ARCH_MXC
304 bool "Freescale MXC/iMX-based"
305 select GENERIC_TIME
306 select GENERIC_CLOCKEVENTS
307 select ARCH_MTD_XIP
308 select GENERIC_GPIO
309 select ARCH_REQUIRE_GPIOLIB
310 select HAVE_CLK
311 help
312 Support for Freescale MXC/iMX-based family of processors
314 config ARCH_STMP3XXX
315 bool "Freescale STMP3xxx"
316 select CPU_ARM926T
317 select HAVE_CLK
318 select COMMON_CLKDEV
319 select ARCH_REQUIRE_GPIOLIB
320 select GENERIC_TIME
321 select GENERIC_CLOCKEVENTS
322 select GENERIC_GPIO
323 select USB_ARCH_HAS_EHCI
324 help
325 Support for systems based on the Freescale 3xxx CPUs.
327 config ARCH_NETX
328 bool "Hilscher NetX based"
329 select CPU_ARM926T
330 select ARM_VIC
331 select GENERIC_CLOCKEVENTS
332 select GENERIC_TIME
333 help
334 This enables support for systems based on the Hilscher NetX Soc
336 config ARCH_H720X
337 bool "Hynix HMS720x-based"
338 select CPU_ARM720T
339 select ISA_DMA_API
340 help
341 This enables support for systems based on the Hynix HMS720x
343 config ARCH_NOMADIK
344 bool "STMicroelectronics Nomadik"
345 select ARM_AMBA
346 select ARM_VIC
347 select CPU_ARM926T
348 select HAVE_CLK
349 select COMMON_CLKDEV
350 select GENERIC_TIME
351 select GENERIC_CLOCKEVENTS
352 select GENERIC_GPIO
353 select ARCH_REQUIRE_GPIOLIB
354 help
355 Support for the Nomadik platform by ST-Ericsson
357 config ARCH_IOP13XX
358 bool "IOP13xx-based"
359 depends on MMU
360 select CPU_XSC3
361 select PLAT_IOP
362 select PCI
363 select ARCH_SUPPORTS_MSI
364 select VMSPLIT_1G
365 help
366 Support for Intel's IOP13XX (XScale) family of processors.
368 config ARCH_IOP32X
369 bool "IOP32x-based"
370 depends on MMU
371 select CPU_XSCALE
372 select PLAT_IOP
373 select PCI
374 select GENERIC_GPIO
375 select ARCH_REQUIRE_GPIOLIB
376 help
377 Support for Intel's 80219 and IOP32X (XScale) family of
378 processors.
380 config ARCH_IOP33X
381 bool "IOP33x-based"
382 depends on MMU
383 select CPU_XSCALE
384 select PLAT_IOP
385 select PCI
386 select GENERIC_GPIO
387 select ARCH_REQUIRE_GPIOLIB
388 help
389 Support for Intel's IOP33X (XScale) family of processors.
391 config ARCH_IXP23XX
392 bool "IXP23XX-based"
393 depends on MMU
394 select CPU_XSC3
395 select PCI
396 help
397 Support for Intel's IXP23xx (XScale) family of processors.
399 config ARCH_IXP2000
400 bool "IXP2400/2800-based"
401 depends on MMU
402 select CPU_XSCALE
403 select PCI
404 help
405 Support for Intel's IXP2400/2800 (XScale) family of processors.
407 config ARCH_IXP4XX
408 bool "IXP4xx-based"
409 depends on MMU
410 select CPU_XSCALE
411 select GENERIC_GPIO
412 select GENERIC_TIME
413 select GENERIC_CLOCKEVENTS
414 select DMABOUNCE if PCI
415 help
416 Support for Intel's IXP4XX (XScale) family of processors.
418 config ARCH_L7200
419 bool "LinkUp-L7200"
420 select CPU_ARM720T
421 select FIQ
422 help
423 Say Y here if you intend to run this kernel on a LinkUp Systems
424 L7200 Software Development Board which uses an ARM720T processor.
425 Information on this board can be obtained at:
427 <http://www.linkupsys.com/>
429 If you have any questions or comments about the Linux kernel port
430 to this board, send e-mail to <sjhill@cotw.com>.
432 config ARCH_KIRKWOOD
433 bool "Marvell Kirkwood"
434 select CPU_FEROCEON
435 select PCI
436 select GENERIC_GPIO
437 select ARCH_REQUIRE_GPIOLIB
438 select GENERIC_TIME
439 select GENERIC_CLOCKEVENTS
440 select PLAT_ORION
441 help
442 Support for the following Marvell Kirkwood series SoCs:
443 88F6180, 88F6192 and 88F6281.
445 config ARCH_LOKI
446 bool "Marvell Loki (88RC8480)"
447 select CPU_FEROCEON
448 select GENERIC_TIME
449 select GENERIC_CLOCKEVENTS
450 select PLAT_ORION
451 help
452 Support for the Marvell Loki (88RC8480) SoC.
454 config ARCH_MV78XX0
455 bool "Marvell MV78xx0"
456 select CPU_FEROCEON
457 select PCI
458 select GENERIC_GPIO
459 select ARCH_REQUIRE_GPIOLIB
460 select GENERIC_TIME
461 select GENERIC_CLOCKEVENTS
462 select PLAT_ORION
463 help
464 Support for the following Marvell MV78xx0 series SoCs:
465 MV781x0, MV782x0.
467 config ARCH_ORION5X
468 bool "Marvell Orion"
469 depends on MMU
470 select CPU_FEROCEON
471 select PCI
472 select GENERIC_GPIO
473 select ARCH_REQUIRE_GPIOLIB
474 select GENERIC_TIME
475 select GENERIC_CLOCKEVENTS
476 select PLAT_ORION
477 help
478 Support for the following Marvell Orion 5x series SoCs:
479 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
480 Orion-2 (5281), Orion-1-90 (6183).
482 config ARCH_MMP
483 bool "Marvell PXA168/910"
484 depends on MMU
485 select GENERIC_GPIO
486 select ARCH_REQUIRE_GPIOLIB
487 select HAVE_CLK
488 select COMMON_CLKDEV
489 select GENERIC_TIME
490 select GENERIC_CLOCKEVENTS
491 select TICK_ONESHOT
492 select PLAT_PXA
493 help
494 Support for Marvell's PXA168/910 processor line.
496 config ARCH_KS8695
497 bool "Micrel/Kendin KS8695"
498 select CPU_ARM922T
499 select GENERIC_GPIO
500 select ARCH_REQUIRE_GPIOLIB
501 help
502 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
503 System-on-Chip devices.
505 config ARCH_NS9XXX
506 bool "NetSilicon NS9xxx"
507 select CPU_ARM926T
508 select GENERIC_GPIO
509 select GENERIC_TIME
510 select GENERIC_CLOCKEVENTS
511 select HAVE_CLK
512 help
513 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
514 System.
516 <http://www.digi.com/products/microprocessors/index.jsp>
518 config ARCH_W90X900
519 bool "Nuvoton W90X900 CPU"
520 select CPU_ARM926T
521 select ARCH_REQUIRE_GPIOLIB
522 select GENERIC_GPIO
523 select HAVE_CLK
524 select COMMON_CLKDEV
525 select GENERIC_TIME
526 select GENERIC_CLOCKEVENTS
527 help
528 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
529 At present, the w90x900 has been renamed nuc900, regarding
530 the ARM series product line, you can login the following
531 link address to know more.
533 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
534 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
536 config ARCH_PNX4008
537 bool "Philips Nexperia PNX4008 Mobile"
538 select CPU_ARM926T
539 select HAVE_CLK
540 help
541 This enables support for Philips PNX4008 mobile platform.
543 config ARCH_PXA
544 bool "PXA2xx/PXA3xx-based"
545 depends on MMU
546 select ARCH_MTD_XIP
547 select ARCH_HAS_CPUFREQ
548 select GENERIC_GPIO
549 select HAVE_CLK
550 select COMMON_CLKDEV
551 select ARCH_REQUIRE_GPIOLIB
552 select GENERIC_TIME
553 select GENERIC_CLOCKEVENTS
554 select TICK_ONESHOT
555 select PLAT_PXA
556 help
557 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
559 config ARCH_MSM
560 bool "Qualcomm MSM"
561 select CPU_V6
562 select GENERIC_TIME
563 select GENERIC_CLOCKEVENTS
564 help
565 Support for Qualcomm MSM7K based systems. This runs on the ARM11
566 apps processor of the MSM7K and depends on a shared memory
567 interface to the ARM9 modem processor which runs the baseband stack
568 and controls some vital subsystems (clock and power control, etc).
570 config ARCH_RPC
571 bool "RiscPC"
572 select ARCH_ACORN
573 select FIQ
574 select TIMER_ACORN
575 select ARCH_MAY_HAVE_PC_FDC
576 select HAVE_PATA_PLATFORM
577 select ISA_DMA_API
578 select NO_IOPORT
579 select ARCH_SPARSEMEM_ENABLE
580 help
581 On the Acorn Risc-PC, Linux can support the internal IDE disk and
582 CD-ROM interface, serial and parallel port, and the floppy drive.
584 config ARCH_SA1100
585 bool "SA1100-based"
586 select CPU_SA1100
587 select ISA
588 select ARCH_SPARSEMEM_ENABLE
589 select ARCH_MTD_XIP
590 select ARCH_HAS_CPUFREQ
591 select GENERIC_GPIO
592 select GENERIC_TIME
593 select GENERIC_CLOCKEVENTS
594 select HAVE_CLK
595 select TICK_ONESHOT
596 select ARCH_REQUIRE_GPIOLIB
597 help
598 Support for StrongARM 11x0 based boards.
600 config ARCH_S3C2410
601 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
602 select GENERIC_GPIO
603 select ARCH_HAS_CPUFREQ
604 select HAVE_CLK
605 help
606 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
607 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
608 the Samsung SMDK2410 development board (and derivatives).
610 config ARCH_S3C64XX
611 bool "Samsung S3C64XX"
612 select GENERIC_GPIO
613 select HAVE_CLK
614 select ARCH_HAS_CPUFREQ
615 help
616 Samsung S3C64XX series based systems
618 config ARCH_S5PC1XX
619 bool "Samsung S5PC1XX"
620 select GENERIC_GPIO
621 select HAVE_CLK
622 select CPU_V7
623 help
624 Samsung S5PC1XX series based systems
626 config ARCH_SHARK
627 bool "Shark"
628 select CPU_SA110
629 select ISA
630 select ISA_DMA
631 select ZONE_DMA
632 select PCI
633 help
634 Support for the StrongARM based Digital DNARD machine, also known
635 as "Shark" (<http://www.shark-linux.de/shark.html>).
637 config ARCH_LH7A40X
638 bool "Sharp LH7A40X"
639 select CPU_ARM922T
640 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
641 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
642 help
643 Say Y here for systems based on one of the Sharp LH7A40X
644 System on a Chip processors. These CPUs include an ARM922T
645 core with a wide array of integrated devices for
646 hand-held and low-power applications.
648 config ARCH_U300
649 bool "ST-Ericsson U300 Series"
650 depends on MMU
651 select CPU_ARM926T
652 select ARM_AMBA
653 select ARM_VIC
654 select GENERIC_TIME
655 select GENERIC_CLOCKEVENTS
656 select HAVE_CLK
657 select COMMON_CLKDEV
658 select GENERIC_GPIO
659 help
660 Support for ST-Ericsson U300 series mobile platforms.
662 config ARCH_DAVINCI
663 bool "TI DaVinci"
664 select CPU_ARM926T
665 select GENERIC_TIME
666 select GENERIC_CLOCKEVENTS
667 select GENERIC_GPIO
668 select ARCH_REQUIRE_GPIOLIB
669 select HAVE_CLK
670 select ZONE_DMA
671 select HAVE_IDE
672 select COMMON_CLKDEV
673 select GENERIC_ALLOCATOR
674 help
675 Support for TI's DaVinci platform.
677 config ARCH_OMAP
678 bool "TI OMAP"
679 select GENERIC_GPIO
680 select HAVE_CLK
681 select ARCH_REQUIRE_GPIOLIB
682 select ARCH_HAS_CPUFREQ
683 select GENERIC_TIME
684 select GENERIC_CLOCKEVENTS
685 help
686 Support for TI's OMAP platform (OMAP1 and OMAP2).
688 config ARCH_BCMRING
689 bool "Broadcom BCMRING"
690 depends on MMU
691 select CPU_V6
692 select ARM_AMBA
693 select COMMON_CLKDEV
694 select GENERIC_TIME
695 select GENERIC_CLOCKEVENTS
696 select ARCH_WANT_OPTIONAL_GPIOLIB
697 help
698 Support for Broadcom's BCMRing platform.
700 endchoice
702 source "arch/arm/mach-clps711x/Kconfig"
704 source "arch/arm/mach-ep93xx/Kconfig"
706 source "arch/arm/mach-footbridge/Kconfig"
708 source "arch/arm/mach-gemini/Kconfig"
710 source "arch/arm/mach-integrator/Kconfig"
712 source "arch/arm/mach-iop32x/Kconfig"
714 source "arch/arm/mach-iop33x/Kconfig"
716 source "arch/arm/mach-iop13xx/Kconfig"
718 source "arch/arm/mach-ixp4xx/Kconfig"
720 source "arch/arm/mach-ixp2000/Kconfig"
722 source "arch/arm/mach-ixp23xx/Kconfig"
724 source "arch/arm/mach-loki/Kconfig"
726 source "arch/arm/mach-mv78xx0/Kconfig"
728 source "arch/arm/mach-pxa/Kconfig"
729 source "arch/arm/plat-pxa/Kconfig"
731 source "arch/arm/mach-mmp/Kconfig"
733 source "arch/arm/mach-sa1100/Kconfig"
735 source "arch/arm/plat-omap/Kconfig"
737 source "arch/arm/mach-omap1/Kconfig"
739 source "arch/arm/mach-omap2/Kconfig"
741 source "arch/arm/mach-orion5x/Kconfig"
743 source "arch/arm/mach-kirkwood/Kconfig"
745 source "arch/arm/plat-s3c24xx/Kconfig"
746 source "arch/arm/plat-s3c64xx/Kconfig"
747 source "arch/arm/plat-s3c/Kconfig"
748 source "arch/arm/plat-s5pc1xx/Kconfig"
750 if ARCH_S3C2410
751 source "arch/arm/mach-s3c2400/Kconfig"
752 source "arch/arm/mach-s3c2410/Kconfig"
753 source "arch/arm/mach-s3c2412/Kconfig"
754 source "arch/arm/mach-s3c2440/Kconfig"
755 source "arch/arm/mach-s3c2442/Kconfig"
756 source "arch/arm/mach-s3c2443/Kconfig"
757 endif
759 if ARCH_S3C64XX
760 source "arch/arm/mach-s3c6400/Kconfig"
761 source "arch/arm/mach-s3c6410/Kconfig"
762 endif
764 source "arch/arm/plat-stmp3xxx/Kconfig"
766 if ARCH_S5PC1XX
767 source "arch/arm/mach-s5pc100/Kconfig"
768 endif
770 source "arch/arm/mach-lh7a40x/Kconfig"
772 source "arch/arm/mach-h720x/Kconfig"
774 source "arch/arm/mach-versatile/Kconfig"
776 source "arch/arm/mach-aaec2000/Kconfig"
778 source "arch/arm/mach-realview/Kconfig"
780 source "arch/arm/mach-at91/Kconfig"
782 source "arch/arm/plat-mxc/Kconfig"
784 source "arch/arm/mach-nomadik/Kconfig"
786 source "arch/arm/mach-netx/Kconfig"
788 source "arch/arm/mach-ns9xxx/Kconfig"
790 source "arch/arm/mach-davinci/Kconfig"
792 source "arch/arm/mach-ks8695/Kconfig"
794 source "arch/arm/mach-msm/Kconfig"
796 source "arch/arm/mach-u300/Kconfig"
798 source "arch/arm/mach-w90x900/Kconfig"
800 source "arch/arm/mach-bcmring/Kconfig"
802 # Definitions to make life easier
803 config ARCH_ACORN
804 bool
806 config PLAT_IOP
807 bool
809 config PLAT_ORION
810 bool
812 config PLAT_PXA
813 bool
815 source arch/arm/mm/Kconfig
817 config IWMMXT
818 bool "Enable iWMMXt support"
819 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
820 default y if PXA27x || PXA3xx || ARCH_MMP
821 help
822 Enable support for iWMMXt context switching at run time if
823 running on a CPU that supports it.
825 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
826 config XSCALE_PMU
827 bool
828 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
829 default y
831 if !MMU
832 source "arch/arm/Kconfig-nommu"
833 endif
835 config ARM_ERRATA_411920
836 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
837 depends on CPU_V6 && !SMP
838 help
839 Invalidation of the Instruction Cache operation can
840 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
841 It does not affect the MPCore. This option enables the ARM Ltd.
842 recommended workaround.
844 config ARM_ERRATA_430973
845 bool "ARM errata: Stale prediction on replaced interworking branch"
846 depends on CPU_V7
847 help
848 This option enables the workaround for the 430973 Cortex-A8
849 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
850 interworking branch is replaced with another code sequence at the
851 same virtual address, whether due to self-modifying code or virtual
852 to physical address re-mapping, Cortex-A8 does not recover from the
853 stale interworking branch prediction. This results in Cortex-A8
854 executing the new code sequence in the incorrect ARM or Thumb state.
855 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
856 and also flushes the branch target cache at every context switch.
857 Note that setting specific bits in the ACTLR register may not be
858 available in non-secure mode.
860 config ARM_ERRATA_458693
861 bool "ARM errata: Processor deadlock when a false hazard is created"
862 depends on CPU_V7
863 help
864 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
865 erratum. For very specific sequences of memory operations, it is
866 possible for a hazard condition intended for a cache line to instead
867 be incorrectly associated with a different cache line. This false
868 hazard might then cause a processor deadlock. The workaround enables
869 the L1 caching of the NEON accesses and disables the PLD instruction
870 in the ACTLR register. Note that setting specific bits in the ACTLR
871 register may not be available in non-secure mode.
873 config ARM_ERRATA_460075
874 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
875 depends on CPU_V7
876 help
877 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
878 erratum. Any asynchronous access to the L2 cache may encounter a
879 situation in which recent store transactions to the L2 cache are lost
880 and overwritten with stale memory contents from external memory. The
881 workaround disables the write-allocate mode for the L2 cache via the
882 ACTLR register. Note that setting specific bits in the ACTLR register
883 may not be available in non-secure mode.
885 endmenu
887 source "arch/arm/common/Kconfig"
889 config FORCE_MAX_ZONEORDER
890 int
891 depends on SA1111
892 default "9"
894 menu "Bus support"
896 config ARM_AMBA
897 bool
899 config ISA
900 bool
901 help
902 Find out whether you have ISA slots on your motherboard. ISA is the
903 name of a bus system, i.e. the way the CPU talks to the other stuff
904 inside your box. Other bus systems are PCI, EISA, MicroChannel
905 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
906 newer boards don't support it. If you have ISA, say Y, otherwise N.
908 # Select ISA DMA controller support
909 config ISA_DMA
910 bool
911 select ISA_DMA_API
913 # Select ISA DMA interface
914 config ISA_DMA_API
915 bool
917 config PCI
918 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
919 help
920 Find out whether you have a PCI motherboard. PCI is the name of a
921 bus system, i.e. the way the CPU talks to the other stuff inside
922 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
923 VESA. If you have PCI, say Y, otherwise N.
925 config PCI_SYSCALL
926 def_bool PCI
928 # Select the host bridge type
929 config PCI_HOST_VIA82C505
930 bool
931 depends on PCI && ARCH_SHARK
932 default y
934 config PCI_HOST_ITE8152
935 bool
936 depends on PCI && MACH_ARMCORE
937 default y
938 select DMABOUNCE
940 source "drivers/pci/Kconfig"
942 source "drivers/pcmcia/Kconfig"
944 endmenu
946 menu "Kernel Features"
948 source "kernel/time/Kconfig"
950 config SMP
951 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
952 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
953 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
954 depends on GENERIC_CLOCKEVENTS
955 select USE_GENERIC_SMP_HELPERS
956 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4)
957 help
958 This enables support for systems with more than one CPU. If you have
959 a system with only one CPU, like most personal computers, say N. If
960 you have a system with more than one CPU, say Y.
962 If you say N here, the kernel will run on single and multiprocessor
963 machines, but will use only one CPU of a multiprocessor machine. If
964 you say Y here, the kernel will run on many, but not all, single
965 processor machines. On a single processor machine, the kernel will
966 run faster if you say N here.
968 See also <file:Documentation/i386/IO-APIC.txt>,
969 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
970 <http://www.linuxdoc.org/docs.html#howto>.
972 If you don't know what to do here, say N.
974 config HAVE_ARM_SCU
975 bool
976 depends on SMP
977 help
978 This option enables support for the ARM system coherency unit
980 config HAVE_ARM_TWD
981 bool
982 depends on SMP
983 help
984 This options enables support for the ARM timer and watchdog unit
986 choice
987 prompt "Memory split"
988 default VMSPLIT_3G
989 help
990 Select the desired split between kernel and user memory.
992 If you are not absolutely sure what you are doing, leave this
993 option alone!
995 config VMSPLIT_3G
996 bool "3G/1G user/kernel split"
997 config VMSPLIT_2G
998 bool "2G/2G user/kernel split"
999 config VMSPLIT_1G
1000 bool "1G/3G user/kernel split"
1001 endchoice
1003 config PAGE_OFFSET
1004 hex
1005 default 0x40000000 if VMSPLIT_1G
1006 default 0x80000000 if VMSPLIT_2G
1007 default 0xC0000000
1009 config NR_CPUS
1010 int "Maximum number of CPUs (2-32)"
1011 range 2 32
1012 depends on SMP
1013 default "4"
1015 config HOTPLUG_CPU
1016 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1017 depends on SMP && HOTPLUG && EXPERIMENTAL
1018 help
1019 Say Y here to experiment with turning CPUs off and on. CPUs
1020 can be controlled through /sys/devices/system/cpu.
1022 config LOCAL_TIMERS
1023 bool "Use local timer interrupts"
1024 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1025 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
1026 default y
1027 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4)
1028 help
1029 Enable support for local timers on SMP platforms, rather then the
1030 legacy IPI broadcast method. Local timers allows the system
1031 accounting to be spread across the timer interval, preventing a
1032 "thundering herd" at every timer tick.
1034 source kernel/Kconfig.preempt
1036 config HZ
1037 int
1038 default 128 if ARCH_L7200
1039 default 200 if ARCH_EBSA110 || ARCH_S3C2410
1040 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1041 default AT91_TIMER_HZ if ARCH_AT91
1042 default 100
1044 config THUMB2_KERNEL
1045 bool "Compile the kernel in Thumb-2 mode"
1046 depends on CPU_V7 && EXPERIMENTAL
1047 select AEABI
1048 select ARM_ASM_UNIFIED
1049 help
1050 By enabling this option, the kernel will be compiled in
1051 Thumb-2 mode. A compiler/assembler that understand the unified
1052 ARM-Thumb syntax is needed.
1054 If unsure, say N.
1056 config ARM_ASM_UNIFIED
1057 bool
1059 config AEABI
1060 bool "Use the ARM EABI to compile the kernel"
1061 help
1062 This option allows for the kernel to be compiled using the latest
1063 ARM ABI (aka EABI). This is only useful if you are using a user
1064 space environment that is also compiled with EABI.
1066 Since there are major incompatibilities between the legacy ABI and
1067 EABI, especially with regard to structure member alignment, this
1068 option also changes the kernel syscall calling convention to
1069 disambiguate both ABIs and allow for backward compatibility support
1070 (selected with CONFIG_OABI_COMPAT).
1072 To use this you need GCC version 4.0.0 or later.
1074 config OABI_COMPAT
1075 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1076 depends on AEABI && EXPERIMENTAL
1077 default y
1078 help
1079 This option preserves the old syscall interface along with the
1080 new (ARM EABI) one. It also provides a compatibility layer to
1081 intercept syscalls that have structure arguments which layout
1082 in memory differs between the legacy ABI and the new ARM EABI
1083 (only for non "thumb" binaries). This option adds a tiny
1084 overhead to all syscalls and produces a slightly larger kernel.
1085 If you know you'll be using only pure EABI user space then you
1086 can say N here. If this option is not selected and you attempt
1087 to execute a legacy ABI binary then the result will be
1088 UNPREDICTABLE (in fact it can be predicted that it won't work
1089 at all). If in doubt say Y.
1091 config ARCH_HAS_HOLES_MEMORYMODEL
1092 bool
1094 # Discontigmem is deprecated
1095 config ARCH_DISCONTIGMEM_ENABLE
1096 bool
1098 config ARCH_SPARSEMEM_ENABLE
1099 bool
1101 config ARCH_SPARSEMEM_DEFAULT
1102 def_bool ARCH_SPARSEMEM_ENABLE
1104 config ARCH_SELECT_MEMORY_MODEL
1105 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1107 config NODES_SHIFT
1108 int
1109 default "4" if ARCH_LH7A40X
1110 default "2"
1111 depends on NEED_MULTIPLE_NODES
1113 config HIGHMEM
1114 bool "High Memory Support (EXPERIMENTAL)"
1115 depends on MMU && EXPERIMENTAL
1116 help
1117 The address space of ARM processors is only 4 Gigabytes large
1118 and it has to accommodate user address space, kernel address
1119 space as well as some memory mapped IO. That means that, if you
1120 have a large amount of physical memory and/or IO, not all of the
1121 memory can be "permanently mapped" by the kernel. The physical
1122 memory that is not permanently mapped is called "high memory".
1124 Depending on the selected kernel/user memory split, minimum
1125 vmalloc space and actual amount of RAM, you may not need this
1126 option which should result in a slightly faster kernel.
1128 If unsure, say n.
1130 config HIGHPTE
1131 bool "Allocate 2nd-level pagetables from highmem"
1132 depends on HIGHMEM
1133 depends on !OUTER_CACHE
1135 source "mm/Kconfig"
1137 config LEDS
1138 bool "Timer and CPU usage LEDs"
1139 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1140 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1141 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1142 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1143 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1144 ARCH_AT91 || ARCH_DAVINCI || \
1145 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1146 help
1147 If you say Y here, the LEDs on your machine will be used
1148 to provide useful information about your current system status.
1150 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1151 be able to select which LEDs are active using the options below. If
1152 you are compiling a kernel for the EBSA-110 or the LART however, the
1153 red LED will simply flash regularly to indicate that the system is
1154 still functional. It is safe to say Y here if you have a CATS
1155 system, but the driver will do nothing.
1157 config LEDS_TIMER
1158 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1159 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1160 || MACH_OMAP_PERSEUS2
1161 depends on LEDS
1162 depends on !GENERIC_CLOCKEVENTS
1163 default y if ARCH_EBSA110
1164 help
1165 If you say Y here, one of the system LEDs (the green one on the
1166 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1167 will flash regularly to indicate that the system is still
1168 operational. This is mainly useful to kernel hackers who are
1169 debugging unstable kernels.
1171 The LART uses the same LED for both Timer LED and CPU usage LED
1172 functions. You may choose to use both, but the Timer LED function
1173 will overrule the CPU usage LED.
1175 config LEDS_CPU
1176 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1177 !ARCH_OMAP) \
1178 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1179 || MACH_OMAP_PERSEUS2
1180 depends on LEDS
1181 help
1182 If you say Y here, the red LED will be used to give a good real
1183 time indication of CPU usage, by lighting whenever the idle task
1184 is not currently executing.
1186 The LART uses the same LED for both Timer LED and CPU usage LED
1187 functions. You may choose to use both, but the Timer LED function
1188 will overrule the CPU usage LED.
1190 config ALIGNMENT_TRAP
1191 bool
1192 depends on CPU_CP15_MMU
1193 default y if !ARCH_EBSA110
1194 help
1195 ARM processors cannot fetch/store information which is not
1196 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1197 address divisible by 4. On 32-bit ARM processors, these non-aligned
1198 fetch/store instructions will be emulated in software if you say
1199 here, which has a severe performance impact. This is necessary for
1200 correct operation of some network protocols. With an IP-only
1201 configuration it is safe to say N, otherwise say Y.
1203 config UACCESS_WITH_MEMCPY
1204 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1205 depends on MMU && EXPERIMENTAL
1206 default y if CPU_FEROCEON
1207 help
1208 Implement faster copy_to_user and clear_user methods for CPU
1209 cores where a 8-word STM instruction give significantly higher
1210 memory write throughput than a sequence of individual 32bit stores.
1212 A possible side effect is a slight increase in scheduling latency
1213 between threads sharing the same address space if they invoke
1214 such copy operations with large buffers.
1216 However, if the CPU data cache is using a write-allocate mode,
1217 this option is unlikely to provide any performance gain.
1219 endmenu
1221 menu "Boot options"
1223 # Compressed boot loader in ROM. Yes, we really want to ask about
1224 # TEXT and BSS so we preserve their values in the config files.
1225 config ZBOOT_ROM_TEXT
1226 hex "Compressed ROM boot loader base address"
1227 default "0"
1228 help
1229 The physical address at which the ROM-able zImage is to be
1230 placed in the target. Platforms which normally make use of
1231 ROM-able zImage formats normally set this to a suitable
1232 value in their defconfig file.
1234 If ZBOOT_ROM is not enabled, this has no effect.
1236 config ZBOOT_ROM_BSS
1237 hex "Compressed ROM boot loader BSS address"
1238 default "0"
1239 help
1240 The base address of an area of read/write memory in the target
1241 for the ROM-able zImage which must be available while the
1242 decompressor is running. It must be large enough to hold the
1243 entire decompressed kernel plus an additional 128 KiB.
1244 Platforms which normally make use of ROM-able zImage formats
1245 normally set this to a suitable value in their defconfig file.
1247 If ZBOOT_ROM is not enabled, this has no effect.
1249 config ZBOOT_ROM
1250 bool "Compressed boot loader in ROM/flash"
1251 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1252 help
1253 Say Y here if you intend to execute your compressed kernel image
1254 (zImage) directly from ROM or flash. If unsure, say N.
1256 config CMDLINE
1257 string "Default kernel command string"
1258 default ""
1259 help
1260 On some architectures (EBSA110 and CATS), there is currently no way
1261 for the boot loader to pass arguments to the kernel. For these
1262 architectures, you should supply some command-line options at build
1263 time by entering them here. As a minimum, you should specify the
1264 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1266 config XIP_KERNEL
1267 bool "Kernel Execute-In-Place from ROM"
1268 depends on !ZBOOT_ROM
1269 help
1270 Execute-In-Place allows the kernel to run from non-volatile storage
1271 directly addressable by the CPU, such as NOR flash. This saves RAM
1272 space since the text section of the kernel is not loaded from flash
1273 to RAM. Read-write sections, such as the data section and stack,
1274 are still copied to RAM. The XIP kernel is not compressed since
1275 it has to run directly from flash, so it will take more space to
1276 store it. The flash address used to link the kernel object files,
1277 and for storing it, is configuration dependent. Therefore, if you
1278 say Y here, you must know the proper physical address where to
1279 store the kernel image depending on your own flash memory usage.
1281 Also note that the make target becomes "make xipImage" rather than
1282 "make zImage" or "make Image". The final kernel binary to put in
1283 ROM memory will be arch/arm/boot/xipImage.
1285 If unsure, say N.
1287 config XIP_PHYS_ADDR
1288 hex "XIP Kernel Physical Location"
1289 depends on XIP_KERNEL
1290 default "0x00080000"
1291 help
1292 This is the physical address in your flash memory the kernel will
1293 be linked for and stored to. This address is dependent on your
1294 own flash usage.
1296 config KEXEC
1297 bool "Kexec system call (EXPERIMENTAL)"
1298 depends on EXPERIMENTAL
1299 help
1300 kexec is a system call that implements the ability to shutdown your
1301 current kernel, and to start another kernel. It is like a reboot
1302 but it is independent of the system firmware. And like a reboot
1303 you can start any kernel with it, not just Linux.
1305 It is an ongoing process to be certain the hardware in a machine
1306 is properly shutdown, so do not be surprised if this code does not
1307 initially work for you. It may help to enable device hotplugging
1308 support.
1310 config ATAGS_PROC
1311 bool "Export atags in procfs"
1312 depends on KEXEC
1313 default y
1314 help
1315 Should the atags used to boot the kernel be exported in an "atags"
1316 file in procfs. Useful with kexec.
1318 endmenu
1320 menu "CPU Power Management"
1322 if ARCH_HAS_CPUFREQ
1324 source "drivers/cpufreq/Kconfig"
1326 config CPU_FREQ_SA1100
1327 bool
1328 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1329 default y
1331 config CPU_FREQ_SA1110
1332 bool
1333 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1334 default y
1336 config CPU_FREQ_INTEGRATOR
1337 tristate "CPUfreq driver for ARM Integrator CPUs"
1338 depends on ARCH_INTEGRATOR && CPU_FREQ
1339 default y
1340 help
1341 This enables the CPUfreq driver for ARM Integrator CPUs.
1343 For details, take a look at <file:Documentation/cpu-freq>.
1345 If in doubt, say Y.
1347 config CPU_FREQ_PXA
1348 bool
1349 depends on CPU_FREQ && ARCH_PXA && PXA25x
1350 default y
1351 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1353 config CPU_FREQ_S3C64XX
1354 bool "CPUfreq support for Samsung S3C64XX CPUs"
1355 depends on CPU_FREQ && CPU_S3C6410
1357 config CPU_FREQ_S3C
1358 bool
1359 help
1360 Internal configuration node for common cpufreq on Samsung SoC
1362 config CPU_FREQ_S3C24XX
1363 bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1364 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1365 select CPU_FREQ_S3C
1366 help
1367 This enables the CPUfreq driver for the Samsung S3C24XX family
1368 of CPUs.
1370 For details, take a look at <file:Documentation/cpu-freq>.
1372 If in doubt, say N.
1374 config CPU_FREQ_S3C24XX_PLL
1375 bool "Support CPUfreq changing of PLL frequency"
1376 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1377 help
1378 Compile in support for changing the PLL frequency from the
1379 S3C24XX series CPUfreq driver. The PLL takes time to settle
1380 after a frequency change, so by default it is not enabled.
1382 This also means that the PLL tables for the selected CPU(s) will
1383 be built which may increase the size of the kernel image.
1385 config CPU_FREQ_S3C24XX_DEBUG
1386 bool "Debug CPUfreq Samsung driver core"
1387 depends on CPU_FREQ_S3C24XX
1388 help
1389 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1391 config CPU_FREQ_S3C24XX_IODEBUG
1392 bool "Debug CPUfreq Samsung driver IO timing"
1393 depends on CPU_FREQ_S3C24XX
1394 help
1395 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1397 config CPU_FREQ_S3C24XX_DEBUGFS
1398 bool "Export debugfs for CPUFreq"
1399 depends on CPU_FREQ_S3C24XX && DEBUG_FS
1400 help
1401 Export status information via debugfs.
1403 endif
1405 source "drivers/cpuidle/Kconfig"
1407 endmenu
1409 menu "Floating point emulation"
1411 comment "At least one emulation must be selected"
1413 config FPE_NWFPE
1414 bool "NWFPE math emulation"
1415 depends on !AEABI || OABI_COMPAT
1416 ---help---
1417 Say Y to include the NWFPE floating point emulator in the kernel.
1418 This is necessary to run most binaries. Linux does not currently
1419 support floating point hardware so you need to say Y here even if
1420 your machine has an FPA or floating point co-processor podule.
1422 You may say N here if you are going to load the Acorn FPEmulator
1423 early in the bootup.
1425 config FPE_NWFPE_XP
1426 bool "Support extended precision"
1427 depends on FPE_NWFPE
1428 help
1429 Say Y to include 80-bit support in the kernel floating-point
1430 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1431 Note that gcc does not generate 80-bit operations by default,
1432 so in most cases this option only enlarges the size of the
1433 floating point emulator without any good reason.
1435 You almost surely want to say N here.
1437 config FPE_FASTFPE
1438 bool "FastFPE math emulation (EXPERIMENTAL)"
1439 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1440 ---help---
1441 Say Y here to include the FAST floating point emulator in the kernel.
1442 This is an experimental much faster emulator which now also has full
1443 precision for the mantissa. It does not support any exceptions.
1444 It is very simple, and approximately 3-6 times faster than NWFPE.
1446 It should be sufficient for most programs. It may be not suitable
1447 for scientific calculations, but you have to check this for yourself.
1448 If you do not feel you need a faster FP emulation you should better
1449 choose NWFPE.
1451 config VFP
1452 bool "VFP-format floating point maths"
1453 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1454 help
1455 Say Y to include VFP support code in the kernel. This is needed
1456 if your hardware includes a VFP unit.
1458 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1459 release notes and additional status information.
1461 Say N if your target does not have VFP hardware.
1463 config VFPv3
1464 bool
1465 depends on VFP
1466 default y if CPU_V7
1468 config NEON
1469 bool "Advanced SIMD (NEON) Extension support"
1470 depends on VFPv3 && CPU_V7
1471 help
1472 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1473 Extension.
1475 endmenu
1477 menu "Userspace binary formats"
1479 source "fs/Kconfig.binfmt"
1481 config ARTHUR
1482 tristate "RISC OS personality"
1483 depends on !AEABI
1484 help
1485 Say Y here to include the kernel code necessary if you want to run
1486 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1487 experimental; if this sounds frightening, say N and sleep in peace.
1488 You can also say M here to compile this support as a module (which
1489 will be called arthur).
1491 endmenu
1493 menu "Power management options"
1495 source "kernel/power/Kconfig"
1497 config ARCH_SUSPEND_POSSIBLE
1498 def_bool y
1500 endmenu
1502 source "net/Kconfig"
1504 source "drivers/Kconfig"
1506 source "fs/Kconfig"
1508 source "arch/arm/Kconfig.debug"
1510 source "security/Kconfig"
1512 source "crypto/Kconfig"
1514 source "lib/Kconfig"