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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_MOXART
276 bool "MOXA ART SoC"
277 select CPU_FA526
278 help
279 Support for the MOXA ART SoC. This is a Faraday FA526 ARMv4 32-bit
280 192 MHz processor with MMU and 16KB/8KB D/I-cache (UC-7112-LX)
281 This perticular processor is used on models:
282 UC-7101, UC-7112/UC-7110, IA240/IA241, IA3341.
283 These are DIN-rail / wall-mountable embedded PCs sold by MOXA
284 ( http://www.moxa.com/product/Embedded_Computers.htm )
286 config ARCH_EBSA110
287 bool "EBSA-110"
288 select CPU_SA110
289 select ISA
290 select NO_IOPORT
291 help
292 This is an evaluation board for the StrongARM processor available
293 from Digital. It has limited hardware on-board, including an
294 Ethernet interface, two PCMCIA sockets, two serial ports and a
295 parallel port.
297 config ARCH_EP93XX
298 bool "EP93xx-based"
299 select CPU_ARM920T
300 select ARM_AMBA
301 select ARM_VIC
302 select GENERIC_GPIO
303 select HAVE_CLK
304 select COMMON_CLKDEV
305 select ARCH_REQUIRE_GPIOLIB
306 select ARCH_HAS_HOLES_MEMORYMODEL
307 help
308 This enables support for the Cirrus EP93xx series of CPUs.
310 config ARCH_FOOTBRIDGE
311 bool "FootBridge"
312 select CPU_SA110
313 select FOOTBRIDGE
314 help
315 Support for systems based on the DC21285 companion chip
316 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
318 config ARCH_MXC
319 bool "Freescale MXC/iMX-based"
320 select GENERIC_TIME
321 select GENERIC_CLOCKEVENTS
322 select ARCH_MTD_XIP
323 select GENERIC_GPIO
324 select ARCH_REQUIRE_GPIOLIB
325 select HAVE_CLK
326 help
327 Support for Freescale MXC/iMX-based family of processors
329 config ARCH_STMP3XXX
330 bool "Freescale STMP3xxx"
331 select CPU_ARM926T
332 select HAVE_CLK
333 select COMMON_CLKDEV
334 select ARCH_REQUIRE_GPIOLIB
335 select GENERIC_TIME
336 select GENERIC_CLOCKEVENTS
337 select GENERIC_GPIO
338 select USB_ARCH_HAS_EHCI
339 help
340 Support for systems based on the Freescale 3xxx CPUs.
342 config ARCH_NETX
343 bool "Hilscher NetX based"
344 select CPU_ARM926T
345 select ARM_VIC
346 select GENERIC_CLOCKEVENTS
347 select GENERIC_TIME
348 help
349 This enables support for systems based on the Hilscher NetX Soc
351 config ARCH_H720X
352 bool "Hynix HMS720x-based"
353 select CPU_ARM720T
354 select ISA_DMA_API
355 help
356 This enables support for systems based on the Hynix HMS720x
358 config ARCH_NOMADIK
359 bool "STMicroelectronics Nomadik"
360 select ARM_AMBA
361 select ARM_VIC
362 select CPU_ARM926T
363 select HAVE_CLK
364 select COMMON_CLKDEV
365 select GENERIC_TIME
366 select GENERIC_CLOCKEVENTS
367 select GENERIC_GPIO
368 select ARCH_REQUIRE_GPIOLIB
369 help
370 Support for the Nomadik platform by ST-Ericsson
372 config ARCH_IOP13XX
373 bool "IOP13xx-based"
374 depends on MMU
375 select CPU_XSC3
376 select PLAT_IOP
377 select PCI
378 select ARCH_SUPPORTS_MSI
379 select VMSPLIT_1G
380 help
381 Support for Intel's IOP13XX (XScale) family of processors.
383 config ARCH_IOP32X
384 bool "IOP32x-based"
385 depends on MMU
386 select CPU_XSCALE
387 select PLAT_IOP
388 select PCI
389 select GENERIC_GPIO
390 select ARCH_REQUIRE_GPIOLIB
391 help
392 Support for Intel's 80219 and IOP32X (XScale) family of
393 processors.
395 config ARCH_IOP33X
396 bool "IOP33x-based"
397 depends on MMU
398 select CPU_XSCALE
399 select PLAT_IOP
400 select PCI
401 select GENERIC_GPIO
402 select ARCH_REQUIRE_GPIOLIB
403 help
404 Support for Intel's IOP33X (XScale) family of processors.
406 config ARCH_IXP23XX
407 bool "IXP23XX-based"
408 depends on MMU
409 select CPU_XSC3
410 select PCI
411 help
412 Support for Intel's IXP23xx (XScale) family of processors.
414 config ARCH_IXP2000
415 bool "IXP2400/2800-based"
416 depends on MMU
417 select CPU_XSCALE
418 select PCI
419 help
420 Support for Intel's IXP2400/2800 (XScale) family of processors.
422 config ARCH_IXP4XX
423 bool "IXP4xx-based"
424 depends on MMU
425 select CPU_XSCALE
426 select GENERIC_GPIO
427 select GENERIC_TIME
428 select GENERIC_CLOCKEVENTS
429 select DMABOUNCE if PCI
430 help
431 Support for Intel's IXP4XX (XScale) family of processors.
433 config ARCH_L7200
434 bool "LinkUp-L7200"
435 select CPU_ARM720T
436 select FIQ
437 help
438 Say Y here if you intend to run this kernel on a LinkUp Systems
439 L7200 Software Development Board which uses an ARM720T processor.
440 Information on this board can be obtained at:
442 <http://www.linkupsys.com/>
444 If you have any questions or comments about the Linux kernel port
445 to this board, send e-mail to <sjhill@cotw.com>.
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 GENERIC_GPIO
607 select GENERIC_TIME
608 select GENERIC_CLOCKEVENTS
609 select HAVE_CLK
610 select TICK_ONESHOT
611 select ARCH_REQUIRE_GPIOLIB
612 help
613 Support for StrongARM 11x0 based boards.
615 config ARCH_S3C2410
616 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
617 select GENERIC_GPIO
618 select ARCH_HAS_CPUFREQ
619 select HAVE_CLK
620 help
621 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
622 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
623 the Samsung SMDK2410 development board (and derivatives).
625 config ARCH_S3C64XX
626 bool "Samsung S3C64XX"
627 select GENERIC_GPIO
628 select HAVE_CLK
629 select ARCH_HAS_CPUFREQ
630 help
631 Samsung S3C64XX series based systems
633 config ARCH_S5PC1XX
634 bool "Samsung S5PC1XX"
635 select GENERIC_GPIO
636 select HAVE_CLK
637 select CPU_V7
638 help
639 Samsung S5PC1XX series based systems
641 config ARCH_SHARK
642 bool "Shark"
643 select CPU_SA110
644 select ISA
645 select ISA_DMA
646 select ZONE_DMA
647 select PCI
648 help
649 Support for the StrongARM based Digital DNARD machine, also known
650 as "Shark" (<http://www.shark-linux.de/shark.html>).
652 config ARCH_LH7A40X
653 bool "Sharp LH7A40X"
654 select CPU_ARM922T
655 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
656 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
657 help
658 Say Y here for systems based on one of the Sharp LH7A40X
659 System on a Chip processors. These CPUs include an ARM922T
660 core with a wide array of integrated devices for
661 hand-held and low-power applications.
663 config ARCH_U300
664 bool "ST-Ericsson U300 Series"
665 depends on MMU
666 select CPU_ARM926T
667 select HAVE_TCM
668 select ARM_AMBA
669 select ARM_VIC
670 select GENERIC_TIME
671 select GENERIC_CLOCKEVENTS
672 select HAVE_CLK
673 select COMMON_CLKDEV
674 select GENERIC_GPIO
675 help
676 Support for ST-Ericsson U300 series mobile platforms.
678 config ARCH_DAVINCI
679 bool "TI DaVinci"
680 select CPU_ARM926T
681 select GENERIC_TIME
682 select GENERIC_CLOCKEVENTS
683 select GENERIC_GPIO
684 select ARCH_REQUIRE_GPIOLIB
685 select HAVE_CLK
686 select ZONE_DMA
687 select HAVE_IDE
688 select COMMON_CLKDEV
689 select GENERIC_ALLOCATOR
690 help
691 Support for TI's DaVinci platform.
693 config ARCH_OMAP
694 bool "TI OMAP"
695 select GENERIC_GPIO
696 select HAVE_CLK
697 select ARCH_REQUIRE_GPIOLIB
698 select ARCH_HAS_CPUFREQ
699 select GENERIC_TIME
700 select GENERIC_CLOCKEVENTS
701 help
702 Support for TI's OMAP platform (OMAP1 and OMAP2).
704 config ARCH_BCMRING
705 bool "Broadcom BCMRING"
706 depends on MMU
707 select CPU_V6
708 select ARM_AMBA
709 select COMMON_CLKDEV
710 select GENERIC_TIME
711 select GENERIC_CLOCKEVENTS
712 select ARCH_WANT_OPTIONAL_GPIOLIB
713 help
714 Support for Broadcom's BCMRing platform.
716 endchoice
718 source "arch/arm/mach-clps711x/Kconfig"
720 source "arch/arm/mach-ep93xx/Kconfig"
722 source "arch/arm/mach-footbridge/Kconfig"
724 source "arch/arm/mach-gemini/Kconfig"
726 source "arch/arm/mach-moxart/Kconfig"
728 source "arch/arm/mach-integrator/Kconfig"
730 source "arch/arm/mach-iop32x/Kconfig"
732 source "arch/arm/mach-iop33x/Kconfig"
734 source "arch/arm/mach-iop13xx/Kconfig"
736 source "arch/arm/mach-ixp4xx/Kconfig"
738 source "arch/arm/mach-ixp2000/Kconfig"
740 source "arch/arm/mach-ixp23xx/Kconfig"
742 source "arch/arm/mach-loki/Kconfig"
744 source "arch/arm/mach-mv78xx0/Kconfig"
746 source "arch/arm/mach-pxa/Kconfig"
747 source "arch/arm/plat-pxa/Kconfig"
749 source "arch/arm/mach-mmp/Kconfig"
751 source "arch/arm/mach-sa1100/Kconfig"
753 source "arch/arm/plat-omap/Kconfig"
755 source "arch/arm/mach-omap1/Kconfig"
757 source "arch/arm/mach-omap2/Kconfig"
759 source "arch/arm/mach-orion5x/Kconfig"
761 source "arch/arm/mach-kirkwood/Kconfig"
763 source "arch/arm/plat-s3c24xx/Kconfig"
764 source "arch/arm/plat-s3c64xx/Kconfig"
765 source "arch/arm/plat-s3c/Kconfig"
766 source "arch/arm/plat-s5pc1xx/Kconfig"
768 if ARCH_S3C2410
769 source "arch/arm/mach-s3c2400/Kconfig"
770 source "arch/arm/mach-s3c2410/Kconfig"
771 source "arch/arm/mach-s3c2412/Kconfig"
772 source "arch/arm/mach-s3c2440/Kconfig"
773 source "arch/arm/mach-s3c2442/Kconfig"
774 source "arch/arm/mach-s3c2443/Kconfig"
775 endif
777 if ARCH_S3C64XX
778 source "arch/arm/mach-s3c6400/Kconfig"
779 source "arch/arm/mach-s3c6410/Kconfig"
780 endif
782 source "arch/arm/plat-stmp3xxx/Kconfig"
784 if ARCH_S5PC1XX
785 source "arch/arm/mach-s5pc100/Kconfig"
786 endif
788 source "arch/arm/mach-lh7a40x/Kconfig"
790 source "arch/arm/mach-h720x/Kconfig"
792 source "arch/arm/mach-versatile/Kconfig"
794 source "arch/arm/mach-aaec2000/Kconfig"
796 source "arch/arm/mach-realview/Kconfig"
798 source "arch/arm/mach-at91/Kconfig"
800 source "arch/arm/plat-mxc/Kconfig"
802 source "arch/arm/mach-nomadik/Kconfig"
804 source "arch/arm/mach-netx/Kconfig"
806 source "arch/arm/mach-ns9xxx/Kconfig"
808 source "arch/arm/mach-davinci/Kconfig"
810 source "arch/arm/mach-ks8695/Kconfig"
812 source "arch/arm/mach-msm/Kconfig"
814 source "arch/arm/mach-u300/Kconfig"
816 source "arch/arm/mach-w90x900/Kconfig"
818 source "arch/arm/mach-bcmring/Kconfig"
820 # Definitions to make life easier
821 config ARCH_ACORN
822 bool
824 config PLAT_IOP
825 bool
827 config PLAT_ORION
828 bool
830 config PLAT_PXA
831 bool
833 source arch/arm/mm/Kconfig
835 config IWMMXT
836 bool "Enable iWMMXt support"
837 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
838 default y if PXA27x || PXA3xx || ARCH_MMP
839 help
840 Enable support for iWMMXt context switching at run time if
841 running on a CPU that supports it.
843 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
844 config XSCALE_PMU
845 bool
846 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
847 default y
849 if !MMU
850 source "arch/arm/Kconfig-nommu"
851 endif
853 config ARM_ERRATA_411920
854 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
855 depends on CPU_V6 && !SMP
856 help
857 Invalidation of the Instruction Cache operation can
858 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
859 It does not affect the MPCore. This option enables the ARM Ltd.
860 recommended workaround.
862 config ARM_ERRATA_430973
863 bool "ARM errata: Stale prediction on replaced interworking branch"
864 depends on CPU_V7
865 help
866 This option enables the workaround for the 430973 Cortex-A8
867 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
868 interworking branch is replaced with another code sequence at the
869 same virtual address, whether due to self-modifying code or virtual
870 to physical address re-mapping, Cortex-A8 does not recover from the
871 stale interworking branch prediction. This results in Cortex-A8
872 executing the new code sequence in the incorrect ARM or Thumb state.
873 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
874 and also flushes the branch target cache at every context switch.
875 Note that setting specific bits in the ACTLR register may not be
876 available in non-secure mode.
878 config ARM_ERRATA_458693
879 bool "ARM errata: Processor deadlock when a false hazard is created"
880 depends on CPU_V7
881 help
882 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
883 erratum. For very specific sequences of memory operations, it is
884 possible for a hazard condition intended for a cache line to instead
885 be incorrectly associated with a different cache line. This false
886 hazard might then cause a processor deadlock. The workaround enables
887 the L1 caching of the NEON accesses and disables the PLD instruction
888 in the ACTLR register. Note that setting specific bits in the ACTLR
889 register may not be available in non-secure mode.
891 config ARM_ERRATA_460075
892 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
893 depends on CPU_V7
894 help
895 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
896 erratum. Any asynchronous access to the L2 cache may encounter a
897 situation in which recent store transactions to the L2 cache are lost
898 and overwritten with stale memory contents from external memory. The
899 workaround disables the write-allocate mode for the L2 cache via the
900 ACTLR register. Note that setting specific bits in the ACTLR register
901 may not be available in non-secure mode.
903 config ARM_ERRATA_720789
904 bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
905 depends on CPU_V7 && SMP
906 help
907 This option enables the workaround for the 720789 Cortex-A9 (prior to
908 r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
909 broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
910 As a consequence of this erratum, some TLB entries which should be
911 invalidated are not, resulting in an incoherency in the system page
912 tables. The workaround changes the TLB flushing routines to invalidate
913 entries regardless of the ASID.
915 endmenu
917 source "arch/arm/common/Kconfig"
919 config FORCE_MAX_ZONEORDER
920 int
921 depends on SA1111
922 default "9"
924 menu "Bus support"
926 config ARM_AMBA
927 bool
929 config ISA
930 bool
931 help
932 Find out whether you have ISA slots on your motherboard. ISA is the
933 name of a bus system, i.e. the way the CPU talks to the other stuff
934 inside your box. Other bus systems are PCI, EISA, MicroChannel
935 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
936 newer boards don't support it. If you have ISA, say Y, otherwise N.
938 # Select ISA DMA controller support
939 config ISA_DMA
940 bool
941 select ISA_DMA_API
943 # Select ISA DMA interface
944 config ISA_DMA_API
945 bool
947 config PCI
948 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
949 help
950 Find out whether you have a PCI motherboard. PCI is the name of a
951 bus system, i.e. the way the CPU talks to the other stuff inside
952 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
953 VESA. If you have PCI, say Y, otherwise N.
955 config PCI_SYSCALL
956 def_bool PCI
958 # Select the host bridge type
959 config PCI_HOST_VIA82C505
960 bool
961 depends on PCI && ARCH_SHARK
962 default y
964 config PCI_HOST_ITE8152
965 bool
966 depends on PCI && MACH_ARMCORE
967 default y
968 select DMABOUNCE
970 source "drivers/pci/Kconfig"
972 source "drivers/pcmcia/Kconfig"
974 endmenu
976 menu "Kernel Features"
978 source "kernel/time/Kconfig"
980 config SMP
981 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
982 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
983 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
984 depends on GENERIC_CLOCKEVENTS
985 select USE_GENERIC_SMP_HELPERS
986 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4)
987 help
988 This enables support for systems with more than one CPU. If you have
989 a system with only one CPU, like most personal computers, say N. If
990 you have a system with more than one CPU, say Y.
992 If you say N here, the kernel will run on single and multiprocessor
993 machines, but will use only one CPU of a multiprocessor machine. If
994 you say Y here, the kernel will run on many, but not all, single
995 processor machines. On a single processor machine, the kernel will
996 run faster if you say N here.
998 See also <file:Documentation/i386/IO-APIC.txt>,
999 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1000 <http://www.linuxdoc.org/docs.html#howto>.
1002 If you don't know what to do here, say N.
1004 config HAVE_ARM_SCU
1005 bool
1006 depends on SMP
1007 help
1008 This option enables support for the ARM system coherency unit
1010 config HAVE_ARM_TWD
1011 bool
1012 depends on SMP
1013 help
1014 This options enables support for the ARM timer and watchdog unit
1016 choice
1017 prompt "Memory split"
1018 default VMSPLIT_3G
1019 help
1020 Select the desired split between kernel and user memory.
1022 If you are not absolutely sure what you are doing, leave this
1023 option alone!
1025 config VMSPLIT_3G
1026 bool "3G/1G user/kernel split"
1027 config VMSPLIT_2G
1028 bool "2G/2G user/kernel split"
1029 config VMSPLIT_1G
1030 bool "1G/3G user/kernel split"
1031 endchoice
1033 config PAGE_OFFSET
1034 hex
1035 default 0x40000000 if VMSPLIT_1G
1036 default 0x80000000 if VMSPLIT_2G
1037 default 0xC0000000
1039 config NR_CPUS
1040 int "Maximum number of CPUs (2-32)"
1041 range 2 32
1042 depends on SMP
1043 default "4"
1045 config HOTPLUG_CPU
1046 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1047 depends on SMP && HOTPLUG && EXPERIMENTAL
1048 help
1049 Say Y here to experiment with turning CPUs off and on. CPUs
1050 can be controlled through /sys/devices/system/cpu.
1052 config LOCAL_TIMERS
1053 bool "Use local timer interrupts"
1054 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1055 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
1056 default y
1057 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4)
1058 help
1059 Enable support for local timers on SMP platforms, rather then the
1060 legacy IPI broadcast method. Local timers allows the system
1061 accounting to be spread across the timer interval, preventing a
1062 "thundering herd" at every timer tick.
1064 source kernel/Kconfig.preempt
1066 config HZ
1067 int
1068 default 128 if ARCH_L7200
1069 default 200 if ARCH_EBSA110 || ARCH_S3C2410
1070 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1071 default AT91_TIMER_HZ if ARCH_AT91
1072 default 100
1074 config THUMB2_KERNEL
1075 bool "Compile the kernel in Thumb-2 mode"
1076 depends on CPU_V7 && EXPERIMENTAL
1077 select AEABI
1078 select ARM_ASM_UNIFIED
1079 help
1080 By enabling this option, the kernel will be compiled in
1081 Thumb-2 mode. A compiler/assembler that understand the unified
1082 ARM-Thumb syntax is needed.
1084 If unsure, say N.
1086 config ARM_ASM_UNIFIED
1087 bool
1089 config AEABI
1090 bool "Use the ARM EABI to compile the kernel"
1091 help
1092 This option allows for the kernel to be compiled using the latest
1093 ARM ABI (aka EABI). This is only useful if you are using a user
1094 space environment that is also compiled with EABI.
1096 Since there are major incompatibilities between the legacy ABI and
1097 EABI, especially with regard to structure member alignment, this
1098 option also changes the kernel syscall calling convention to
1099 disambiguate both ABIs and allow for backward compatibility support
1100 (selected with CONFIG_OABI_COMPAT).
1102 To use this you need GCC version 4.0.0 or later.
1104 config OABI_COMPAT
1105 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1106 depends on AEABI && EXPERIMENTAL
1107 default y
1108 help
1109 This option preserves the old syscall interface along with the
1110 new (ARM EABI) one. It also provides a compatibility layer to
1111 intercept syscalls that have structure arguments which layout
1112 in memory differs between the legacy ABI and the new ARM EABI
1113 (only for non "thumb" binaries). This option adds a tiny
1114 overhead to all syscalls and produces a slightly larger kernel.
1115 If you know you'll be using only pure EABI user space then you
1116 can say N here. If this option is not selected and you attempt
1117 to execute a legacy ABI binary then the result will be
1118 UNPREDICTABLE (in fact it can be predicted that it won't work
1119 at all). If in doubt say Y.
1121 config ARCH_HAS_HOLES_MEMORYMODEL
1122 bool
1124 # Discontigmem is deprecated
1125 config ARCH_DISCONTIGMEM_ENABLE
1126 bool
1128 config ARCH_SPARSEMEM_ENABLE
1129 bool
1131 config ARCH_SPARSEMEM_DEFAULT
1132 def_bool ARCH_SPARSEMEM_ENABLE
1134 config ARCH_SELECT_MEMORY_MODEL
1135 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1137 config NODES_SHIFT
1138 int
1139 default "4" if ARCH_LH7A40X
1140 default "2"
1141 depends on NEED_MULTIPLE_NODES
1143 config HIGHMEM
1144 bool "High Memory Support (EXPERIMENTAL)"
1145 depends on MMU && EXPERIMENTAL
1146 help
1147 The address space of ARM processors is only 4 Gigabytes large
1148 and it has to accommodate user address space, kernel address
1149 space as well as some memory mapped IO. That means that, if you
1150 have a large amount of physical memory and/or IO, not all of the
1151 memory can be "permanently mapped" by the kernel. The physical
1152 memory that is not permanently mapped is called "high memory".
1154 Depending on the selected kernel/user memory split, minimum
1155 vmalloc space and actual amount of RAM, you may not need this
1156 option which should result in a slightly faster kernel.
1158 If unsure, say n.
1160 config HIGHPTE
1161 bool "Allocate 2nd-level pagetables from highmem"
1162 depends on HIGHMEM
1163 depends on !OUTER_CACHE
1165 source "mm/Kconfig"
1167 config LEDS
1168 bool "Timer and CPU usage LEDs"
1169 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1170 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1171 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1172 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1173 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1174 ARCH_AT91 || ARCH_DAVINCI || \
1175 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1176 help
1177 If you say Y here, the LEDs on your machine will be used
1178 to provide useful information about your current system status.
1180 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1181 be able to select which LEDs are active using the options below. If
1182 you are compiling a kernel for the EBSA-110 or the LART however, the
1183 red LED will simply flash regularly to indicate that the system is
1184 still functional. It is safe to say Y here if you have a CATS
1185 system, but the driver will do nothing.
1187 config LEDS_TIMER
1188 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1189 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1190 || MACH_OMAP_PERSEUS2
1191 depends on LEDS
1192 depends on !GENERIC_CLOCKEVENTS
1193 default y if ARCH_EBSA110
1194 help
1195 If you say Y here, one of the system LEDs (the green one on the
1196 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1197 will flash regularly to indicate that the system is still
1198 operational. This is mainly useful to kernel hackers who are
1199 debugging unstable kernels.
1201 The LART uses the same LED for both Timer LED and CPU usage LED
1202 functions. You may choose to use both, but the Timer LED function
1203 will overrule the CPU usage LED.
1205 config LEDS_CPU
1206 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1207 !ARCH_OMAP) \
1208 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1209 || MACH_OMAP_PERSEUS2
1210 depends on LEDS
1211 help
1212 If you say Y here, the red LED will be used to give a good real
1213 time indication of CPU usage, by lighting whenever the idle task
1214 is not currently executing.
1216 The LART uses the same LED for both Timer LED and CPU usage LED
1217 functions. You may choose to use both, but the Timer LED function
1218 will overrule the CPU usage LED.
1220 config ALIGNMENT_TRAP
1221 bool
1222 depends on CPU_CP15_MMU
1223 default y if !ARCH_EBSA110
1224 help
1225 ARM processors cannot fetch/store information which is not
1226 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1227 address divisible by 4. On 32-bit ARM processors, these non-aligned
1228 fetch/store instructions will be emulated in software if you say
1229 here, which has a severe performance impact. This is necessary for
1230 correct operation of some network protocols. With an IP-only
1231 configuration it is safe to say N, otherwise say Y.
1233 config UACCESS_WITH_MEMCPY
1234 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1235 depends on MMU && EXPERIMENTAL
1236 default y if CPU_FEROCEON
1237 help
1238 Implement faster copy_to_user and clear_user methods for CPU
1239 cores where a 8-word STM instruction give significantly higher
1240 memory write throughput than a sequence of individual 32bit stores.
1242 A possible side effect is a slight increase in scheduling latency
1243 between threads sharing the same address space if they invoke
1244 such copy operations with large buffers.
1246 However, if the CPU data cache is using a write-allocate mode,
1247 this option is unlikely to provide any performance gain.
1249 endmenu
1251 menu "Boot options"
1253 # Compressed boot loader in ROM. Yes, we really want to ask about
1254 # TEXT and BSS so we preserve their values in the config files.
1255 config ZBOOT_ROM_TEXT
1256 hex "Compressed ROM boot loader base address"
1257 default "0"
1258 help
1259 The physical address at which the ROM-able zImage is to be
1260 placed in the target. Platforms which normally make use of
1261 ROM-able zImage formats normally set this to a suitable
1262 value in their defconfig file.
1264 If ZBOOT_ROM is not enabled, this has no effect.
1266 config ZBOOT_ROM_BSS
1267 hex "Compressed ROM boot loader BSS address"
1268 default "0"
1269 help
1270 The base address of an area of read/write memory in the target
1271 for the ROM-able zImage which must be available while the
1272 decompressor is running. It must be large enough to hold the
1273 entire decompressed kernel plus an additional 128 KiB.
1274 Platforms which normally make use of ROM-able zImage formats
1275 normally set this to a suitable value in their defconfig file.
1277 If ZBOOT_ROM is not enabled, this has no effect.
1279 config ZBOOT_ROM
1280 bool "Compressed boot loader in ROM/flash"
1281 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1282 help
1283 Say Y here if you intend to execute your compressed kernel image
1284 (zImage) directly from ROM or flash. If unsure, say N.
1286 config CMDLINE
1287 string "Default kernel command string"
1288 default ""
1289 help
1290 On some architectures (EBSA110 and CATS), there is currently no way
1291 for the boot loader to pass arguments to the kernel. For these
1292 architectures, you should supply some command-line options at build
1293 time by entering them here. As a minimum, you should specify the
1294 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1296 config XIP_KERNEL
1297 bool "Kernel Execute-In-Place from ROM"
1298 depends on !ZBOOT_ROM
1299 help
1300 Execute-In-Place allows the kernel to run from non-volatile storage
1301 directly addressable by the CPU, such as NOR flash. This saves RAM
1302 space since the text section of the kernel is not loaded from flash
1303 to RAM. Read-write sections, such as the data section and stack,
1304 are still copied to RAM. The XIP kernel is not compressed since
1305 it has to run directly from flash, so it will take more space to
1306 store it. The flash address used to link the kernel object files,
1307 and for storing it, is configuration dependent. Therefore, if you
1308 say Y here, you must know the proper physical address where to
1309 store the kernel image depending on your own flash memory usage.
1311 Also note that the make target becomes "make xipImage" rather than
1312 "make zImage" or "make Image". The final kernel binary to put in
1313 ROM memory will be arch/arm/boot/xipImage.
1315 If unsure, say N.
1317 config XIP_PHYS_ADDR
1318 hex "XIP Kernel Physical Location"
1319 depends on XIP_KERNEL
1320 default "0x00080000"
1321 help
1322 This is the physical address in your flash memory the kernel will
1323 be linked for and stored to. This address is dependent on your
1324 own flash usage.
1326 config KEXEC
1327 bool "Kexec system call (EXPERIMENTAL)"
1328 depends on EXPERIMENTAL
1329 help
1330 kexec is a system call that implements the ability to shutdown your
1331 current kernel, and to start another kernel. It is like a reboot
1332 but it is independent of the system firmware. And like a reboot
1333 you can start any kernel with it, not just Linux.
1335 It is an ongoing process to be certain the hardware in a machine
1336 is properly shutdown, so do not be surprised if this code does not
1337 initially work for you. It may help to enable device hotplugging
1338 support.
1340 config ATAGS_PROC
1341 bool "Export atags in procfs"
1342 depends on KEXEC
1343 default y
1344 help
1345 Should the atags used to boot the kernel be exported in an "atags"
1346 file in procfs. Useful with kexec.
1348 config PL310_ERRATA_769419
1349 bool "PL310 errata: no automatic Store Buffer drain"
1350 depends on CACHE_L2X0
1351 help
1352 On revisions of the PL310 prior to r3p2, the Store Buffer does
1353 not automatically drain. This can cause normal, non-cacheable
1354 writes to be retained when the memory system is idle, leading
1355 to suboptimal I/O performance for drivers using coherent DMA.
1356 This option adds a write barrier to the cpu_idle loop so that,
1357 on systems with an outer cache, the store buffer is drained
1358 explicitly.
1360 endmenu
1362 menu "CPU Power Management"
1364 if ARCH_HAS_CPUFREQ
1366 source "drivers/cpufreq/Kconfig"
1368 config CPU_FREQ_SA1100
1369 bool
1370 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1371 default y
1373 config CPU_FREQ_SA1110
1374 bool
1375 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1376 default y
1378 config CPU_FREQ_INTEGRATOR
1379 tristate "CPUfreq driver for ARM Integrator CPUs"
1380 depends on ARCH_INTEGRATOR && CPU_FREQ
1381 default y
1382 help
1383 This enables the CPUfreq driver for ARM Integrator CPUs.
1385 For details, take a look at <file:Documentation/cpu-freq>.
1387 If in doubt, say Y.
1389 config CPU_FREQ_PXA
1390 bool
1391 depends on CPU_FREQ && ARCH_PXA && PXA25x
1392 default y
1393 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1395 config CPU_FREQ_S3C64XX
1396 bool "CPUfreq support for Samsung S3C64XX CPUs"
1397 depends on CPU_FREQ && CPU_S3C6410
1399 config CPU_FREQ_S3C
1400 bool
1401 help
1402 Internal configuration node for common cpufreq on Samsung SoC
1404 config CPU_FREQ_S3C24XX
1405 bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1406 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1407 select CPU_FREQ_S3C
1408 help
1409 This enables the CPUfreq driver for the Samsung S3C24XX family
1410 of CPUs.
1412 For details, take a look at <file:Documentation/cpu-freq>.
1414 If in doubt, say N.
1416 config CPU_FREQ_S3C24XX_PLL
1417 bool "Support CPUfreq changing of PLL frequency"
1418 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1419 help
1420 Compile in support for changing the PLL frequency from the
1421 S3C24XX series CPUfreq driver. The PLL takes time to settle
1422 after a frequency change, so by default it is not enabled.
1424 This also means that the PLL tables for the selected CPU(s) will
1425 be built which may increase the size of the kernel image.
1427 config CPU_FREQ_S3C24XX_DEBUG
1428 bool "Debug CPUfreq Samsung driver core"
1429 depends on CPU_FREQ_S3C24XX
1430 help
1431 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1433 config CPU_FREQ_S3C24XX_IODEBUG
1434 bool "Debug CPUfreq Samsung driver IO timing"
1435 depends on CPU_FREQ_S3C24XX
1436 help
1437 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1439 config CPU_FREQ_S3C24XX_DEBUGFS
1440 bool "Export debugfs for CPUFreq"
1441 depends on CPU_FREQ_S3C24XX && DEBUG_FS
1442 help
1443 Export status information via debugfs.
1445 endif
1447 source "drivers/cpuidle/Kconfig"
1449 endmenu
1451 menu "Floating point emulation"
1453 comment "At least one emulation must be selected"
1455 config FPE_NWFPE
1456 bool "NWFPE math emulation"
1457 depends on !AEABI || OABI_COMPAT
1458 ---help---
1459 Say Y to include the NWFPE floating point emulator in the kernel.
1460 This is necessary to run most binaries. Linux does not currently
1461 support floating point hardware so you need to say Y here even if
1462 your machine has an FPA or floating point co-processor podule.
1464 You may say N here if you are going to load the Acorn FPEmulator
1465 early in the bootup.
1467 config FPE_NWFPE_XP
1468 bool "Support extended precision"
1469 depends on FPE_NWFPE
1470 help
1471 Say Y to include 80-bit support in the kernel floating-point
1472 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1473 Note that gcc does not generate 80-bit operations by default,
1474 so in most cases this option only enlarges the size of the
1475 floating point emulator without any good reason.
1477 You almost surely want to say N here.
1479 config FPE_FASTFPE
1480 bool "FastFPE math emulation (EXPERIMENTAL)"
1481 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1482 ---help---
1483 Say Y here to include the FAST floating point emulator in the kernel.
1484 This is an experimental much faster emulator which now also has full
1485 precision for the mantissa. It does not support any exceptions.
1486 It is very simple, and approximately 3-6 times faster than NWFPE.
1488 It should be sufficient for most programs. It may be not suitable
1489 for scientific calculations, but you have to check this for yourself.
1490 If you do not feel you need a faster FP emulation you should better
1491 choose NWFPE.
1493 config VFP
1494 bool "VFP-format floating point maths"
1495 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1496 help
1497 Say Y to include VFP support code in the kernel. This is needed
1498 if your hardware includes a VFP unit.
1500 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1501 release notes and additional status information.
1503 Say N if your target does not have VFP hardware.
1505 config VFPv3
1506 bool
1507 depends on VFP
1508 default y if CPU_V7
1510 config NEON
1511 bool "Advanced SIMD (NEON) Extension support"
1512 depends on VFPv3 && CPU_V7
1513 help
1514 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1515 Extension.
1517 endmenu
1519 menu "Userspace binary formats"
1521 source "fs/Kconfig.binfmt"
1523 config ARTHUR
1524 tristate "RISC OS personality"
1525 depends on !AEABI
1526 help
1527 Say Y here to include the kernel code necessary if you want to run
1528 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1529 experimental; if this sounds frightening, say N and sleep in peace.
1530 You can also say M here to compile this support as a module (which
1531 will be called arthur).
1533 endmenu
1535 menu "Power management options"
1537 source "kernel/power/Kconfig"
1539 config ARCH_SUSPEND_POSSIBLE
1540 def_bool y
1542 endmenu
1544 source "net/Kconfig"
1546 source "drivers/Kconfig"
1548 source "fs/Kconfig"
1550 source "arch/arm/Kconfig.debug"
1552 source "security/Kconfig"
1554 source "crypto/Kconfig"
1556 source "lib/Kconfig"