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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_DOVE
437 bool "Marvell Dove"
438 select PCI
439 select GENERIC_GPIO
440 select ARCH_REQUIRE_GPIOLIB
441 select GENERIC_TIME
442 select GENERIC_CLOCKEVENTS
443 select PLAT_ORION
444 help
445 Support for the Marvell Dove SoC 88AP510
447 config ARCH_KIRKWOOD
448 bool "Marvell Kirkwood"
449 select CPU_FEROCEON
450 select PCI
451 select GENERIC_GPIO
452 select ARCH_REQUIRE_GPIOLIB
453 select GENERIC_TIME
454 select GENERIC_CLOCKEVENTS
455 select PLAT_ORION
456 help
457 Support for the following Marvell Kirkwood series SoCs:
458 88F6180, 88F6192 and 88F6281.
460 config ARCH_LOKI
461 bool "Marvell Loki (88RC8480)"
462 select CPU_FEROCEON
463 select GENERIC_TIME
464 select GENERIC_CLOCKEVENTS
465 select PLAT_ORION
466 help
467 Support for the Marvell Loki (88RC8480) SoC.
469 config ARCH_MV78XX0
470 bool "Marvell MV78xx0"
471 select CPU_FEROCEON
472 select PCI
473 select GENERIC_GPIO
474 select ARCH_REQUIRE_GPIOLIB
475 select GENERIC_TIME
476 select GENERIC_CLOCKEVENTS
477 select PLAT_ORION
478 help
479 Support for the following Marvell MV78xx0 series SoCs:
480 MV781x0, MV782x0.
482 config ARCH_ORION5X
483 bool "Marvell Orion"
484 depends on MMU
485 select CPU_FEROCEON
486 select PCI
487 select GENERIC_GPIO
488 select ARCH_REQUIRE_GPIOLIB
489 select GENERIC_TIME
490 select GENERIC_CLOCKEVENTS
491 select PLAT_ORION
492 help
493 Support for the following Marvell Orion 5x series SoCs:
494 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
495 Orion-2 (5281), Orion-1-90 (6183).
497 config ARCH_MMP
498 bool "Marvell PXA168/910"
499 depends on MMU
500 select GENERIC_GPIO
501 select ARCH_REQUIRE_GPIOLIB
502 select HAVE_CLK
503 select COMMON_CLKDEV
504 select GENERIC_TIME
505 select GENERIC_CLOCKEVENTS
506 select TICK_ONESHOT
507 select PLAT_PXA
508 help
509 Support for Marvell's PXA168/910 processor line.
511 config ARCH_KS8695
512 bool "Micrel/Kendin KS8695"
513 select CPU_ARM922T
514 select GENERIC_GPIO
515 select ARCH_REQUIRE_GPIOLIB
516 help
517 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
518 System-on-Chip devices.
520 config ARCH_NS9XXX
521 bool "NetSilicon NS9xxx"
522 select CPU_ARM926T
523 select GENERIC_GPIO
524 select GENERIC_TIME
525 select GENERIC_CLOCKEVENTS
526 select HAVE_CLK
527 help
528 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
529 System.
531 <http://www.digi.com/products/microprocessors/index.jsp>
533 config ARCH_W90X900
534 bool "Nuvoton W90X900 CPU"
535 select CPU_ARM926T
536 select ARCH_REQUIRE_GPIOLIB
537 select GENERIC_GPIO
538 select HAVE_CLK
539 select COMMON_CLKDEV
540 select GENERIC_TIME
541 select GENERIC_CLOCKEVENTS
542 help
543 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
544 At present, the w90x900 has been renamed nuc900, regarding
545 the ARM series product line, you can login the following
546 link address to know more.
548 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
549 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
551 config ARCH_PNX4008
552 bool "Philips Nexperia PNX4008 Mobile"
553 select CPU_ARM926T
554 select HAVE_CLK
555 help
556 This enables support for Philips PNX4008 mobile platform.
558 config ARCH_PXA
559 bool "PXA2xx/PXA3xx-based"
560 depends on MMU
561 select ARCH_MTD_XIP
562 select ARCH_HAS_CPUFREQ
563 select GENERIC_GPIO
564 select HAVE_CLK
565 select COMMON_CLKDEV
566 select ARCH_REQUIRE_GPIOLIB
567 select GENERIC_TIME
568 select GENERIC_CLOCKEVENTS
569 select TICK_ONESHOT
570 select PLAT_PXA
571 help
572 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
574 config ARCH_MSM
575 bool "Qualcomm MSM"
576 select CPU_V6
577 select GENERIC_TIME
578 select GENERIC_CLOCKEVENTS
579 help
580 Support for Qualcomm MSM7K based systems. This runs on the ARM11
581 apps processor of the MSM7K and depends on a shared memory
582 interface to the ARM9 modem processor which runs the baseband stack
583 and controls some vital subsystems (clock and power control, etc).
585 config ARCH_RPC
586 bool "RiscPC"
587 select ARCH_ACORN
588 select FIQ
589 select TIMER_ACORN
590 select ARCH_MAY_HAVE_PC_FDC
591 select HAVE_PATA_PLATFORM
592 select ISA_DMA_API
593 select NO_IOPORT
594 select ARCH_SPARSEMEM_ENABLE
595 help
596 On the Acorn Risc-PC, Linux can support the internal IDE disk and
597 CD-ROM interface, serial and parallel port, and the floppy drive.
599 config ARCH_SA1100
600 bool "SA1100-based"
601 select CPU_SA1100
602 select ISA
603 select ARCH_SPARSEMEM_ENABLE
604 select ARCH_MTD_XIP
605 select ARCH_HAS_CPUFREQ
606 select CPU_FREQ
607 select GENERIC_GPIO
608 select GENERIC_TIME
609 select GENERIC_CLOCKEVENTS
610 select HAVE_CLK
611 select TICK_ONESHOT
612 select ARCH_REQUIRE_GPIOLIB
613 help
614 Support for StrongARM 11x0 based boards.
616 config ARCH_S3C2410
617 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
618 select GENERIC_GPIO
619 select ARCH_HAS_CPUFREQ
620 select HAVE_CLK
621 help
622 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
623 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
624 the Samsung SMDK2410 development board (and derivatives).
626 config ARCH_S3C64XX
627 bool "Samsung S3C64XX"
628 select GENERIC_GPIO
629 select HAVE_CLK
630 select ARCH_HAS_CPUFREQ
631 help
632 Samsung S3C64XX series based systems
634 config ARCH_S5PC1XX
635 bool "Samsung S5PC1XX"
636 select GENERIC_GPIO
637 select HAVE_CLK
638 select CPU_V7
639 help
640 Samsung S5PC1XX series based systems
642 config ARCH_SHARK
643 bool "Shark"
644 select CPU_SA110
645 select ISA
646 select ISA_DMA
647 select ZONE_DMA
648 select PCI
649 help
650 Support for the StrongARM based Digital DNARD machine, also known
651 as "Shark" (<http://www.shark-linux.de/shark.html>).
653 config ARCH_LH7A40X
654 bool "Sharp LH7A40X"
655 select CPU_ARM922T
656 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
657 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
658 help
659 Say Y here for systems based on one of the Sharp LH7A40X
660 System on a Chip processors. These CPUs include an ARM922T
661 core with a wide array of integrated devices for
662 hand-held and low-power applications.
664 config ARCH_U300
665 bool "ST-Ericsson U300 Series"
666 depends on MMU
667 select CPU_ARM926T
668 select HAVE_TCM
669 select ARM_AMBA
670 select ARM_VIC
671 select GENERIC_TIME
672 select GENERIC_CLOCKEVENTS
673 select HAVE_CLK
674 select COMMON_CLKDEV
675 select GENERIC_GPIO
676 help
677 Support for ST-Ericsson U300 series mobile platforms.
679 config ARCH_DAVINCI
680 bool "TI DaVinci"
681 select CPU_ARM926T
682 select GENERIC_TIME
683 select GENERIC_CLOCKEVENTS
684 select GENERIC_GPIO
685 select ARCH_REQUIRE_GPIOLIB
686 select HAVE_CLK
687 select ZONE_DMA
688 select HAVE_IDE
689 select COMMON_CLKDEV
690 select GENERIC_ALLOCATOR
691 help
692 Support for TI's DaVinci platform.
694 config ARCH_OMAP
695 bool "TI OMAP"
696 select GENERIC_GPIO
697 select HAVE_CLK
698 select ARCH_REQUIRE_GPIOLIB
699 select ARCH_HAS_CPUFREQ
700 select GENERIC_TIME
701 select GENERIC_CLOCKEVENTS
702 help
703 Support for TI's OMAP platform (OMAP1 and OMAP2).
705 config ARCH_BCMRING
706 bool "Broadcom BCMRING"
707 depends on MMU
708 select CPU_V6
709 select ARM_AMBA
710 select COMMON_CLKDEV
711 select GENERIC_TIME
712 select GENERIC_CLOCKEVENTS
713 select ARCH_WANT_OPTIONAL_GPIOLIB
714 help
715 Support for Broadcom's BCMRing platform.
717 config ARCH_U8500
718 bool "ST-Ericsson U8500 Series"
719 select CPU_V7
720 select ARM_AMBA
721 select GENERIC_TIME
722 select GENERIC_CLOCKEVENTS
723 select COMMON_CLKDEV
724 help
725 Support for ST-Ericsson's Ux500 architecture
727 endchoice
729 source "arch/arm/mach-clps711x/Kconfig"
731 source "arch/arm/mach-ep93xx/Kconfig"
733 source "arch/arm/mach-footbridge/Kconfig"
735 source "arch/arm/mach-gemini/Kconfig"
737 source "arch/arm/mach-integrator/Kconfig"
739 source "arch/arm/mach-iop32x/Kconfig"
741 source "arch/arm/mach-iop33x/Kconfig"
743 source "arch/arm/mach-iop13xx/Kconfig"
745 source "arch/arm/mach-ixp4xx/Kconfig"
747 source "arch/arm/mach-ixp2000/Kconfig"
749 source "arch/arm/mach-ixp23xx/Kconfig"
751 source "arch/arm/mach-loki/Kconfig"
753 source "arch/arm/mach-mv78xx0/Kconfig"
755 source "arch/arm/mach-pxa/Kconfig"
756 source "arch/arm/plat-pxa/Kconfig"
758 source "arch/arm/mach-mmp/Kconfig"
760 source "arch/arm/mach-sa1100/Kconfig"
762 source "arch/arm/plat-omap/Kconfig"
764 source "arch/arm/mach-omap1/Kconfig"
766 source "arch/arm/mach-omap2/Kconfig"
768 source "arch/arm/mach-orion5x/Kconfig"
770 source "arch/arm/mach-kirkwood/Kconfig"
772 source "arch/arm/mach-dove/Kconfig"
774 source "arch/arm/plat-samsung/Kconfig"
775 source "arch/arm/plat-s3c24xx/Kconfig"
776 source "arch/arm/plat-s3c64xx/Kconfig"
777 source "arch/arm/plat-s3c/Kconfig"
778 source "arch/arm/plat-s5pc1xx/Kconfig"
780 if ARCH_S3C2410
781 source "arch/arm/mach-s3c2400/Kconfig"
782 source "arch/arm/mach-s3c2410/Kconfig"
783 source "arch/arm/mach-s3c2412/Kconfig"
784 source "arch/arm/mach-s3c2440/Kconfig"
785 source "arch/arm/mach-s3c2442/Kconfig"
786 source "arch/arm/mach-s3c2443/Kconfig"
787 endif
789 if ARCH_S3C64XX
790 source "arch/arm/mach-s3c6400/Kconfig"
791 source "arch/arm/mach-s3c6410/Kconfig"
792 endif
794 source "arch/arm/plat-stmp3xxx/Kconfig"
796 if ARCH_S5PC1XX
797 source "arch/arm/mach-s5pc100/Kconfig"
798 endif
800 source "arch/arm/mach-lh7a40x/Kconfig"
802 source "arch/arm/mach-h720x/Kconfig"
804 source "arch/arm/mach-versatile/Kconfig"
806 source "arch/arm/mach-aaec2000/Kconfig"
808 source "arch/arm/mach-realview/Kconfig"
810 source "arch/arm/mach-at91/Kconfig"
812 source "arch/arm/plat-mxc/Kconfig"
814 source "arch/arm/mach-nomadik/Kconfig"
815 source "arch/arm/plat-nomadik/Kconfig"
817 source "arch/arm/mach-netx/Kconfig"
819 source "arch/arm/mach-ns9xxx/Kconfig"
821 source "arch/arm/mach-davinci/Kconfig"
823 source "arch/arm/mach-ks8695/Kconfig"
825 source "arch/arm/mach-msm/Kconfig"
827 source "arch/arm/mach-u300/Kconfig"
829 source "arch/arm/mach-w90x900/Kconfig"
831 source "arch/arm/mach-bcmring/Kconfig"
833 source "arch/arm/mach-ux500/Kconfig"
835 # Definitions to make life easier
836 config ARCH_ACORN
837 bool
839 config PLAT_IOP
840 bool
841 select GENERIC_CLOCKEVENTS
842 select GENERIC_TIME
844 config PLAT_ORION
845 bool
847 config PLAT_PXA
848 bool
850 source arch/arm/mm/Kconfig
852 config IWMMXT
853 bool "Enable iWMMXt support"
854 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
855 default y if PXA27x || PXA3xx || ARCH_MMP
856 help
857 Enable support for iWMMXt context switching at run time if
858 running on a CPU that supports it.
860 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
861 config XSCALE_PMU
862 bool
863 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
864 default y
866 if !MMU
867 source "arch/arm/Kconfig-nommu"
868 endif
870 config ARM_ERRATA_411920
871 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
872 depends on CPU_V6 && !SMP
873 help
874 Invalidation of the Instruction Cache operation can
875 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
876 It does not affect the MPCore. This option enables the ARM Ltd.
877 recommended workaround.
879 config ARM_ERRATA_430973
880 bool "ARM errata: Stale prediction on replaced interworking branch"
881 depends on CPU_V7
882 help
883 This option enables the workaround for the 430973 Cortex-A8
884 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
885 interworking branch is replaced with another code sequence at the
886 same virtual address, whether due to self-modifying code or virtual
887 to physical address re-mapping, Cortex-A8 does not recover from the
888 stale interworking branch prediction. This results in Cortex-A8
889 executing the new code sequence in the incorrect ARM or Thumb state.
890 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
891 and also flushes the branch target cache at every context switch.
892 Note that setting specific bits in the ACTLR register may not be
893 available in non-secure mode.
895 config ARM_ERRATA_458693
896 bool "ARM errata: Processor deadlock when a false hazard is created"
897 depends on CPU_V7
898 help
899 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
900 erratum. For very specific sequences of memory operations, it is
901 possible for a hazard condition intended for a cache line to instead
902 be incorrectly associated with a different cache line. This false
903 hazard might then cause a processor deadlock. The workaround enables
904 the L1 caching of the NEON accesses and disables the PLD instruction
905 in the ACTLR register. Note that setting specific bits in the ACTLR
906 register may not be available in non-secure mode.
908 config ARM_ERRATA_460075
909 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
910 depends on CPU_V7
911 help
912 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
913 erratum. Any asynchronous access to the L2 cache may encounter a
914 situation in which recent store transactions to the L2 cache are lost
915 and overwritten with stale memory contents from external memory. The
916 workaround disables the write-allocate mode for the L2 cache via the
917 ACTLR register. Note that setting specific bits in the ACTLR register
918 may not be available in non-secure mode.
920 endmenu
922 source "arch/arm/common/Kconfig"
924 config FORCE_MAX_ZONEORDER
925 int
926 depends on SA1111
927 default "9"
929 menu "Bus support"
931 config ARM_AMBA
932 bool
934 config ISA
935 bool
936 help
937 Find out whether you have ISA slots on your motherboard. ISA is the
938 name of a bus system, i.e. the way the CPU talks to the other stuff
939 inside your box. Other bus systems are PCI, EISA, MicroChannel
940 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
941 newer boards don't support it. If you have ISA, say Y, otherwise N.
943 # Select ISA DMA controller support
944 config ISA_DMA
945 bool
946 select ISA_DMA_API
948 # Select ISA DMA interface
949 config ISA_DMA_API
950 bool
952 config PCI
953 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
954 help
955 Find out whether you have a PCI motherboard. PCI is the name of a
956 bus system, i.e. the way the CPU talks to the other stuff inside
957 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
958 VESA. If you have PCI, say Y, otherwise N.
960 config PCI_SYSCALL
961 def_bool PCI
963 # Select the host bridge type
964 config PCI_HOST_VIA82C505
965 bool
966 depends on PCI && ARCH_SHARK
967 default y
969 config PCI_HOST_ITE8152
970 bool
971 depends on PCI && MACH_ARMCORE
972 default y
973 select DMABOUNCE
975 source "drivers/pci/Kconfig"
977 source "drivers/pcmcia/Kconfig"
979 endmenu
981 menu "Kernel Features"
983 source "kernel/time/Kconfig"
985 config SMP
986 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
987 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
988 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
989 depends on GENERIC_CLOCKEVENTS
990 select USE_GENERIC_SMP_HELPERS
991 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
992 help
993 This enables support for systems with more than one CPU. If you have
994 a system with only one CPU, like most personal computers, say N. If
995 you have a system with more than one CPU, say Y.
997 If you say N here, the kernel will run on single and multiprocessor
998 machines, but will use only one CPU of a multiprocessor machine. If
999 you say Y here, the kernel will run on many, but not all, single
1000 processor machines. On a single processor machine, the kernel will
1001 run faster if you say N here.
1003 See also <file:Documentation/i386/IO-APIC.txt>,
1004 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1005 <http://www.linuxdoc.org/docs.html#howto>.
1007 If you don't know what to do here, say N.
1009 config HAVE_ARM_SCU
1010 bool
1011 depends on SMP
1012 help
1013 This option enables support for the ARM system coherency unit
1015 config HAVE_ARM_TWD
1016 bool
1017 depends on SMP
1018 help
1019 This options enables support for the ARM timer and watchdog unit
1021 choice
1022 prompt "Memory split"
1023 default VMSPLIT_3G
1024 help
1025 Select the desired split between kernel and user memory.
1027 If you are not absolutely sure what you are doing, leave this
1028 option alone!
1030 config VMSPLIT_3G
1031 bool "3G/1G user/kernel split"
1032 config VMSPLIT_2G
1033 bool "2G/2G user/kernel split"
1034 config VMSPLIT_1G
1035 bool "1G/3G user/kernel split"
1036 endchoice
1038 config PAGE_OFFSET
1039 hex
1040 default 0x40000000 if VMSPLIT_1G
1041 default 0x80000000 if VMSPLIT_2G
1042 default 0xC0000000
1044 config NR_CPUS
1045 int "Maximum number of CPUs (2-32)"
1046 range 2 32
1047 depends on SMP
1048 default "4"
1050 config HOTPLUG_CPU
1051 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1052 depends on SMP && HOTPLUG && EXPERIMENTAL
1053 help
1054 Say Y here to experiment with turning CPUs off and on. CPUs
1055 can be controlled through /sys/devices/system/cpu.
1057 config LOCAL_TIMERS
1058 bool "Use local timer interrupts"
1059 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1060 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1061 default y
1062 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1063 help
1064 Enable support for local timers on SMP platforms, rather then the
1065 legacy IPI broadcast method. Local timers allows the system
1066 accounting to be spread across the timer interval, preventing a
1067 "thundering herd" at every timer tick.
1069 source kernel/Kconfig.preempt
1071 config HZ
1072 int
1073 default 128 if ARCH_L7200
1074 default 200 if ARCH_EBSA110 || ARCH_S3C2410
1075 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1076 default AT91_TIMER_HZ if ARCH_AT91
1077 default 100
1079 config THUMB2_KERNEL
1080 bool "Compile the kernel in Thumb-2 mode"
1081 depends on CPU_V7 && EXPERIMENTAL
1082 select AEABI
1083 select ARM_ASM_UNIFIED
1084 help
1085 By enabling this option, the kernel will be compiled in
1086 Thumb-2 mode. A compiler/assembler that understand the unified
1087 ARM-Thumb syntax is needed.
1089 If unsure, say N.
1091 config ARM_ASM_UNIFIED
1092 bool
1094 config AEABI
1095 bool "Use the ARM EABI to compile the kernel"
1096 help
1097 This option allows for the kernel to be compiled using the latest
1098 ARM ABI (aka EABI). This is only useful if you are using a user
1099 space environment that is also compiled with EABI.
1101 Since there are major incompatibilities between the legacy ABI and
1102 EABI, especially with regard to structure member alignment, this
1103 option also changes the kernel syscall calling convention to
1104 disambiguate both ABIs and allow for backward compatibility support
1105 (selected with CONFIG_OABI_COMPAT).
1107 To use this you need GCC version 4.0.0 or later.
1109 config OABI_COMPAT
1110 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1111 depends on AEABI && EXPERIMENTAL
1112 default y
1113 help
1114 This option preserves the old syscall interface along with the
1115 new (ARM EABI) one. It also provides a compatibility layer to
1116 intercept syscalls that have structure arguments which layout
1117 in memory differs between the legacy ABI and the new ARM EABI
1118 (only for non "thumb" binaries). This option adds a tiny
1119 overhead to all syscalls and produces a slightly larger kernel.
1120 If you know you'll be using only pure EABI user space then you
1121 can say N here. If this option is not selected and you attempt
1122 to execute a legacy ABI binary then the result will be
1123 UNPREDICTABLE (in fact it can be predicted that it won't work
1124 at all). If in doubt say Y.
1126 config ARCH_HAS_HOLES_MEMORYMODEL
1127 bool
1129 # Discontigmem is deprecated
1130 config ARCH_DISCONTIGMEM_ENABLE
1131 bool
1133 config ARCH_SPARSEMEM_ENABLE
1134 bool
1136 config ARCH_SPARSEMEM_DEFAULT
1137 def_bool ARCH_SPARSEMEM_ENABLE
1139 config ARCH_SELECT_MEMORY_MODEL
1140 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1142 config NODES_SHIFT
1143 int
1144 default "4" if ARCH_LH7A40X
1145 default "2"
1146 depends on NEED_MULTIPLE_NODES
1148 config HIGHMEM
1149 bool "High Memory Support (EXPERIMENTAL)"
1150 depends on MMU && EXPERIMENTAL
1151 help
1152 The address space of ARM processors is only 4 Gigabytes large
1153 and it has to accommodate user address space, kernel address
1154 space as well as some memory mapped IO. That means that, if you
1155 have a large amount of physical memory and/or IO, not all of the
1156 memory can be "permanently mapped" by the kernel. The physical
1157 memory that is not permanently mapped is called "high memory".
1159 Depending on the selected kernel/user memory split, minimum
1160 vmalloc space and actual amount of RAM, you may not need this
1161 option which should result in a slightly faster kernel.
1163 If unsure, say n.
1165 config HIGHPTE
1166 bool "Allocate 2nd-level pagetables from highmem"
1167 depends on HIGHMEM
1168 depends on !OUTER_CACHE
1170 source "mm/Kconfig"
1172 config LEDS
1173 bool "Timer and CPU usage LEDs"
1174 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1175 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1176 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1177 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1178 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1179 ARCH_AT91 || ARCH_DAVINCI || \
1180 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1181 help
1182 If you say Y here, the LEDs on your machine will be used
1183 to provide useful information about your current system status.
1185 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1186 be able to select which LEDs are active using the options below. If
1187 you are compiling a kernel for the EBSA-110 or the LART however, the
1188 red LED will simply flash regularly to indicate that the system is
1189 still functional. It is safe to say Y here if you have a CATS
1190 system, but the driver will do nothing.
1192 config LEDS_TIMER
1193 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1194 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1195 || MACH_OMAP_PERSEUS2
1196 depends on LEDS
1197 depends on !GENERIC_CLOCKEVENTS
1198 default y if ARCH_EBSA110
1199 help
1200 If you say Y here, one of the system LEDs (the green one on the
1201 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1202 will flash regularly to indicate that the system is still
1203 operational. This is mainly useful to kernel hackers who are
1204 debugging unstable kernels.
1206 The LART uses the same LED for both Timer LED and CPU usage LED
1207 functions. You may choose to use both, but the Timer LED function
1208 will overrule the CPU usage LED.
1210 config LEDS_CPU
1211 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1212 !ARCH_OMAP) \
1213 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1214 || MACH_OMAP_PERSEUS2
1215 depends on LEDS
1216 help
1217 If you say Y here, the red LED will be used to give a good real
1218 time indication of CPU usage, by lighting whenever the idle task
1219 is not currently executing.
1221 The LART uses the same LED for both Timer LED and CPU usage LED
1222 functions. You may choose to use both, but the Timer LED function
1223 will overrule the CPU usage LED.
1225 config ALIGNMENT_TRAP
1226 bool
1227 depends on CPU_CP15_MMU
1228 default y if !ARCH_EBSA110
1229 help
1230 ARM processors cannot fetch/store information which is not
1231 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1232 address divisible by 4. On 32-bit ARM processors, these non-aligned
1233 fetch/store instructions will be emulated in software if you say
1234 here, which has a severe performance impact. This is necessary for
1235 correct operation of some network protocols. With an IP-only
1236 configuration it is safe to say N, otherwise say Y.
1238 config UACCESS_WITH_MEMCPY
1239 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1240 depends on MMU && EXPERIMENTAL
1241 default y if CPU_FEROCEON
1242 help
1243 Implement faster copy_to_user and clear_user methods for CPU
1244 cores where a 8-word STM instruction give significantly higher
1245 memory write throughput than a sequence of individual 32bit stores.
1247 A possible side effect is a slight increase in scheduling latency
1248 between threads sharing the same address space if they invoke
1249 such copy operations with large buffers.
1251 However, if the CPU data cache is using a write-allocate mode,
1252 this option is unlikely to provide any performance gain.
1254 endmenu
1256 menu "Boot options"
1258 # Compressed boot loader in ROM. Yes, we really want to ask about
1259 # TEXT and BSS so we preserve their values in the config files.
1260 config ZBOOT_ROM_TEXT
1261 hex "Compressed ROM boot loader base address"
1262 default "0"
1263 help
1264 The physical address at which the ROM-able zImage is to be
1265 placed in the target. Platforms which normally make use of
1266 ROM-able zImage formats normally set this to a suitable
1267 value in their defconfig file.
1269 If ZBOOT_ROM is not enabled, this has no effect.
1271 config ZBOOT_ROM_BSS
1272 hex "Compressed ROM boot loader BSS address"
1273 default "0"
1274 help
1275 The base address of an area of read/write memory in the target
1276 for the ROM-able zImage which must be available while the
1277 decompressor is running. It must be large enough to hold the
1278 entire decompressed kernel plus an additional 128 KiB.
1279 Platforms which normally make use of ROM-able zImage formats
1280 normally set this to a suitable value in their defconfig file.
1282 If ZBOOT_ROM is not enabled, this has no effect.
1284 config ZBOOT_ROM
1285 bool "Compressed boot loader in ROM/flash"
1286 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1287 help
1288 Say Y here if you intend to execute your compressed kernel image
1289 (zImage) directly from ROM or flash. If unsure, say N.
1291 config CMDLINE
1292 string "Default kernel command string"
1293 default ""
1294 help
1295 On some architectures (EBSA110 and CATS), there is currently no way
1296 for the boot loader to pass arguments to the kernel. For these
1297 architectures, you should supply some command-line options at build
1298 time by entering them here. As a minimum, you should specify the
1299 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1301 config XIP_KERNEL
1302 bool "Kernel Execute-In-Place from ROM"
1303 depends on !ZBOOT_ROM
1304 help
1305 Execute-In-Place allows the kernel to run from non-volatile storage
1306 directly addressable by the CPU, such as NOR flash. This saves RAM
1307 space since the text section of the kernel is not loaded from flash
1308 to RAM. Read-write sections, such as the data section and stack,
1309 are still copied to RAM. The XIP kernel is not compressed since
1310 it has to run directly from flash, so it will take more space to
1311 store it. The flash address used to link the kernel object files,
1312 and for storing it, is configuration dependent. Therefore, if you
1313 say Y here, you must know the proper physical address where to
1314 store the kernel image depending on your own flash memory usage.
1316 Also note that the make target becomes "make xipImage" rather than
1317 "make zImage" or "make Image". The final kernel binary to put in
1318 ROM memory will be arch/arm/boot/xipImage.
1320 If unsure, say N.
1322 config XIP_PHYS_ADDR
1323 hex "XIP Kernel Physical Location"
1324 depends on XIP_KERNEL
1325 default "0x00080000"
1326 help
1327 This is the physical address in your flash memory the kernel will
1328 be linked for and stored to. This address is dependent on your
1329 own flash usage.
1331 config KEXEC
1332 bool "Kexec system call (EXPERIMENTAL)"
1333 depends on EXPERIMENTAL
1334 help
1335 kexec is a system call that implements the ability to shutdown your
1336 current kernel, and to start another kernel. It is like a reboot
1337 but it is independent of the system firmware. And like a reboot
1338 you can start any kernel with it, not just Linux.
1340 It is an ongoing process to be certain the hardware in a machine
1341 is properly shutdown, so do not be surprised if this code does not
1342 initially work for you. It may help to enable device hotplugging
1343 support.
1345 config ATAGS_PROC
1346 bool "Export atags in procfs"
1347 depends on KEXEC
1348 default y
1349 help
1350 Should the atags used to boot the kernel be exported in an "atags"
1351 file in procfs. Useful with kexec.
1353 endmenu
1355 menu "CPU Power Management"
1357 if ARCH_HAS_CPUFREQ
1359 source "drivers/cpufreq/Kconfig"
1361 config CPU_FREQ_SA1100
1362 bool
1364 config CPU_FREQ_SA1110
1365 bool
1367 config CPU_FREQ_INTEGRATOR
1368 tristate "CPUfreq driver for ARM Integrator CPUs"
1369 depends on ARCH_INTEGRATOR && CPU_FREQ
1370 default y
1371 help
1372 This enables the CPUfreq driver for ARM Integrator CPUs.
1374 For details, take a look at <file:Documentation/cpu-freq>.
1376 If in doubt, say Y.
1378 config CPU_FREQ_PXA
1379 bool
1380 depends on CPU_FREQ && ARCH_PXA && PXA25x
1381 default y
1382 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1384 config CPU_FREQ_S3C64XX
1385 bool "CPUfreq support for Samsung S3C64XX CPUs"
1386 depends on CPU_FREQ && CPU_S3C6410
1388 config CPU_FREQ_S3C
1389 bool
1390 help
1391 Internal configuration node for common cpufreq on Samsung SoC
1393 config CPU_FREQ_S3C24XX
1394 bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1395 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1396 select CPU_FREQ_S3C
1397 help
1398 This enables the CPUfreq driver for the Samsung S3C24XX family
1399 of CPUs.
1401 For details, take a look at <file:Documentation/cpu-freq>.
1403 If in doubt, say N.
1405 config CPU_FREQ_S3C24XX_PLL
1406 bool "Support CPUfreq changing of PLL frequency"
1407 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1408 help
1409 Compile in support for changing the PLL frequency from the
1410 S3C24XX series CPUfreq driver. The PLL takes time to settle
1411 after a frequency change, so by default it is not enabled.
1413 This also means that the PLL tables for the selected CPU(s) will
1414 be built which may increase the size of the kernel image.
1416 config CPU_FREQ_S3C24XX_DEBUG
1417 bool "Debug CPUfreq Samsung driver core"
1418 depends on CPU_FREQ_S3C24XX
1419 help
1420 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1422 config CPU_FREQ_S3C24XX_IODEBUG
1423 bool "Debug CPUfreq Samsung driver IO timing"
1424 depends on CPU_FREQ_S3C24XX
1425 help
1426 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1428 config CPU_FREQ_S3C24XX_DEBUGFS
1429 bool "Export debugfs for CPUFreq"
1430 depends on CPU_FREQ_S3C24XX && DEBUG_FS
1431 help
1432 Export status information via debugfs.
1434 endif
1436 source "drivers/cpuidle/Kconfig"
1438 endmenu
1440 menu "Floating point emulation"
1442 comment "At least one emulation must be selected"
1444 config FPE_NWFPE
1445 bool "NWFPE math emulation"
1446 depends on !AEABI || OABI_COMPAT
1447 ---help---
1448 Say Y to include the NWFPE floating point emulator in the kernel.
1449 This is necessary to run most binaries. Linux does not currently
1450 support floating point hardware so you need to say Y here even if
1451 your machine has an FPA or floating point co-processor podule.
1453 You may say N here if you are going to load the Acorn FPEmulator
1454 early in the bootup.
1456 config FPE_NWFPE_XP
1457 bool "Support extended precision"
1458 depends on FPE_NWFPE
1459 help
1460 Say Y to include 80-bit support in the kernel floating-point
1461 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1462 Note that gcc does not generate 80-bit operations by default,
1463 so in most cases this option only enlarges the size of the
1464 floating point emulator without any good reason.
1466 You almost surely want to say N here.
1468 config FPE_FASTFPE
1469 bool "FastFPE math emulation (EXPERIMENTAL)"
1470 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1471 ---help---
1472 Say Y here to include the FAST floating point emulator in the kernel.
1473 This is an experimental much faster emulator which now also has full
1474 precision for the mantissa. It does not support any exceptions.
1475 It is very simple, and approximately 3-6 times faster than NWFPE.
1477 It should be sufficient for most programs. It may be not suitable
1478 for scientific calculations, but you have to check this for yourself.
1479 If you do not feel you need a faster FP emulation you should better
1480 choose NWFPE.
1482 config VFP
1483 bool "VFP-format floating point maths"
1484 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1485 help
1486 Say Y to include VFP support code in the kernel. This is needed
1487 if your hardware includes a VFP unit.
1489 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1490 release notes and additional status information.
1492 Say N if your target does not have VFP hardware.
1494 config VFPv3
1495 bool
1496 depends on VFP
1497 default y if CPU_V7
1499 config NEON
1500 bool "Advanced SIMD (NEON) Extension support"
1501 depends on VFPv3 && CPU_V7
1502 help
1503 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1504 Extension.
1506 endmenu
1508 menu "Userspace binary formats"
1510 source "fs/Kconfig.binfmt"
1512 config ARTHUR
1513 tristate "RISC OS personality"
1514 depends on !AEABI
1515 help
1516 Say Y here to include the kernel code necessary if you want to run
1517 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1518 experimental; if this sounds frightening, say N and sleep in peace.
1519 You can also say M here to compile this support as a module (which
1520 will be called arthur).
1522 endmenu
1524 menu "Power management options"
1526 source "kernel/power/Kconfig"
1528 config ARCH_SUSPEND_POSSIBLE
1529 def_bool y
1531 endmenu
1533 source "net/Kconfig"
1535 source "drivers/Kconfig"
1537 source "fs/Kconfig"
1539 source "arch/arm/Kconfig.debug"
1541 source "security/Kconfig"
1543 source "crypto/Kconfig"
1545 source "lib/Kconfig"