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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 select HAVE_KERNEL_GZIP
22 select HAVE_KERNEL_LZO
23 help
24 The ARM series is a line of low-power-consumption RISC chip designs
25 licensed by ARM Ltd and targeted at embedded applications and
26 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
27 manufactured, but legacy ARM-based PC hardware remains popular in
28 Europe. There is an ARM Linux project with a web page at
29 <http://www.arm.linux.org.uk/>.
31 config HAVE_PWM
32 bool
34 config SYS_SUPPORTS_APM_EMULATION
35 bool
37 config GENERIC_GPIO
38 bool
40 config GENERIC_TIME
41 bool
43 config GENERIC_CLOCKEVENTS
44 bool
46 config GENERIC_CLOCKEVENTS_BROADCAST
47 bool
48 depends on GENERIC_CLOCKEVENTS
49 default y if SMP && !LOCAL_TIMERS
51 config HAVE_TCM
52 bool
53 select GENERIC_ALLOCATOR
55 config NO_IOPORT
56 bool
58 config EISA
59 bool
60 ---help---
61 The Extended Industry Standard Architecture (EISA) bus was
62 developed as an open alternative to the IBM MicroChannel bus.
64 The EISA bus provided some of the features of the IBM MicroChannel
65 bus while maintaining backward compatibility with cards made for
66 the older ISA bus. The EISA bus saw limited use between 1988 and
67 1995 when it was made obsolete by the PCI bus.
69 Say Y here if you are building a kernel for an EISA-based machine.
71 Otherwise, say N.
73 config SBUS
74 bool
76 config MCA
77 bool
78 help
79 MicroChannel Architecture is found in some IBM PS/2 machines and
80 laptops. It is a bus system similar to PCI or ISA. See
81 <file:Documentation/mca.txt> (and especially the web page given
82 there) before attempting to build an MCA bus kernel.
84 config GENERIC_HARDIRQS
85 bool
86 default y
88 config STACKTRACE_SUPPORT
89 bool
90 default y
92 config HAVE_LATENCYTOP_SUPPORT
93 bool
94 depends on !SMP
95 default y
97 config LOCKDEP_SUPPORT
98 bool
99 default y
101 config TRACE_IRQFLAGS_SUPPORT
102 bool
103 default y
105 config HARDIRQS_SW_RESEND
106 bool
107 default y
109 config GENERIC_IRQ_PROBE
110 bool
111 default y
113 config GENERIC_LOCKBREAK
114 bool
115 default y
116 depends on SMP && PREEMPT
118 config RWSEM_GENERIC_SPINLOCK
119 bool
120 default y
122 config RWSEM_XCHGADD_ALGORITHM
123 bool
125 config ARCH_HAS_ILOG2_U32
126 bool
128 config ARCH_HAS_ILOG2_U64
129 bool
131 config ARCH_HAS_CPUFREQ
132 bool
133 help
134 Internal node to signify that the ARCH has CPUFREQ support
135 and that the relevant menu configurations are displayed for
136 it.
138 config GENERIC_HWEIGHT
139 bool
140 default y
142 config GENERIC_CALIBRATE_DELAY
143 bool
144 default y
146 config ARCH_MAY_HAVE_PC_FDC
147 bool
149 config ZONE_DMA
150 bool
152 config GENERIC_ISA_DMA
153 bool
155 config FIQ
156 bool
158 config ARCH_MTD_XIP
159 bool
161 config GENERIC_HARDIRQS_NO__DO_IRQ
162 def_bool y
164 if OPROFILE
166 config OPROFILE_ARMV6
167 def_bool y
168 depends on CPU_V6 && !SMP
169 select OPROFILE_ARM11_CORE
171 config OPROFILE_MPCORE
172 def_bool y
173 depends on CPU_V6 && SMP
174 select OPROFILE_ARM11_CORE
176 config OPROFILE_ARM11_CORE
177 bool
179 config OPROFILE_ARMV7
180 def_bool y
181 depends on CPU_V7 && !SMP
182 bool
184 endif
186 config VECTORS_BASE
187 hex
188 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
189 default DRAM_BASE if REMAP_VECTORS_TO_RAM
190 default 0x00000000
191 help
192 The base address of exception vectors.
194 source "init/Kconfig"
196 source "kernel/Kconfig.freezer"
198 menu "System Type"
200 config MMU
201 bool "MMU-based Paged Memory Management Support"
202 default y
203 help
204 Select if you want MMU-based virtualised addressing space
205 support by paged memory management. If unsure, say 'Y'.
207 choice
208 prompt "ARM system type"
209 default ARCH_VERSATILE
211 config ARCH_AAEC2000
212 bool "Agilent AAEC-2000 based"
213 select CPU_ARM920T
214 select ARM_AMBA
215 select HAVE_CLK
216 help
217 This enables support for systems based on the Agilent AAEC-2000
219 config ARCH_INTEGRATOR
220 bool "ARM Ltd. Integrator family"
221 select ARM_AMBA
222 select ARCH_HAS_CPUFREQ
223 select HAVE_CLK
224 select COMMON_CLKDEV
225 select ICST525
226 help
227 Support for ARM's Integrator platform.
229 config ARCH_REALVIEW
230 bool "ARM Ltd. RealView family"
231 select ARM_AMBA
232 select HAVE_CLK
233 select COMMON_CLKDEV
234 select ICST307
235 select GENERIC_TIME
236 select GENERIC_CLOCKEVENTS
237 select ARCH_WANT_OPTIONAL_GPIOLIB
238 help
239 This enables support for ARM Ltd RealView boards.
241 config ARCH_VERSATILE
242 bool "ARM Ltd. Versatile family"
243 select ARM_AMBA
244 select ARM_VIC
245 select HAVE_CLK
246 select COMMON_CLKDEV
247 select ICST307
248 select GENERIC_TIME
249 select GENERIC_CLOCKEVENTS
250 select ARCH_WANT_OPTIONAL_GPIOLIB
251 help
252 This enables support for ARM Ltd Versatile board.
254 config ARCH_AT91
255 bool "Atmel AT91"
256 select GENERIC_GPIO
257 select ARCH_REQUIRE_GPIOLIB
258 select HAVE_CLK
259 help
260 This enables support for systems based on the Atmel AT91RM9200,
261 AT91SAM9 and AT91CAP9 processors.
263 config ARCH_CLPS711X
264 bool "Cirrus Logic CLPS711x/EP721x-based"
265 select CPU_ARM720T
266 help
267 Support for Cirrus Logic 711x/721x based boards.
269 config ARCH_GEMINI
270 bool "Cortina Systems Gemini"
271 select CPU_FA526
272 select GENERIC_GPIO
273 select ARCH_REQUIRE_GPIOLIB
274 help
275 Support for the Cortina Systems Gemini family SoCs
277 config ARCH_EBSA110
278 bool "EBSA-110"
279 select CPU_SA110
280 select ISA
281 select NO_IOPORT
282 help
283 This is an evaluation board for the StrongARM processor available
284 from Digital. It has limited hardware on-board, including an
285 Ethernet interface, two PCMCIA sockets, two serial ports and a
286 parallel port.
288 config ARCH_EP93XX
289 bool "EP93xx-based"
290 select CPU_ARM920T
291 select ARM_AMBA
292 select ARM_VIC
293 select GENERIC_GPIO
294 select HAVE_CLK
295 select COMMON_CLKDEV
296 select ARCH_REQUIRE_GPIOLIB
297 select ARCH_HAS_HOLES_MEMORYMODEL
298 help
299 This enables support for the Cirrus EP93xx series of CPUs.
301 config ARCH_FOOTBRIDGE
302 bool "FootBridge"
303 select CPU_SA110
304 select FOOTBRIDGE
305 help
306 Support for systems based on the DC21285 companion chip
307 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
309 config ARCH_MXC
310 bool "Freescale MXC/iMX-based"
311 select GENERIC_TIME
312 select GENERIC_CLOCKEVENTS
313 select ARCH_MTD_XIP
314 select GENERIC_GPIO
315 select ARCH_REQUIRE_GPIOLIB
316 select HAVE_CLK
317 help
318 Support for Freescale MXC/iMX-based family of processors
320 config ARCH_STMP3XXX
321 bool "Freescale STMP3xxx"
322 select CPU_ARM926T
323 select HAVE_CLK
324 select COMMON_CLKDEV
325 select ARCH_REQUIRE_GPIOLIB
326 select GENERIC_TIME
327 select GENERIC_CLOCKEVENTS
328 select GENERIC_GPIO
329 select USB_ARCH_HAS_EHCI
330 help
331 Support for systems based on the Freescale 3xxx CPUs.
333 config ARCH_NETX
334 bool "Hilscher NetX based"
335 select CPU_ARM926T
336 select ARM_VIC
337 select GENERIC_CLOCKEVENTS
338 select GENERIC_TIME
339 help
340 This enables support for systems based on the Hilscher NetX Soc
342 config ARCH_H720X
343 bool "Hynix HMS720x-based"
344 select CPU_ARM720T
345 select ISA_DMA_API
346 help
347 This enables support for systems based on the Hynix HMS720x
349 config ARCH_NOMADIK
350 bool "STMicroelectronics Nomadik"
351 select ARM_AMBA
352 select ARM_VIC
353 select CPU_ARM926T
354 select HAVE_CLK
355 select COMMON_CLKDEV
356 select GENERIC_TIME
357 select GENERIC_CLOCKEVENTS
358 select GENERIC_GPIO
359 select ARCH_REQUIRE_GPIOLIB
360 help
361 Support for the Nomadik platform by ST-Ericsson
363 config ARCH_IOP13XX
364 bool "IOP13xx-based"
365 depends on MMU
366 select CPU_XSC3
367 select PLAT_IOP
368 select PCI
369 select ARCH_SUPPORTS_MSI
370 select VMSPLIT_1G
371 help
372 Support for Intel's IOP13XX (XScale) family of processors.
374 config ARCH_IOP32X
375 bool "IOP32x-based"
376 depends on MMU
377 select CPU_XSCALE
378 select PLAT_IOP
379 select PCI
380 select GENERIC_GPIO
381 select ARCH_REQUIRE_GPIOLIB
382 help
383 Support for Intel's 80219 and IOP32X (XScale) family of
384 processors.
386 config ARCH_IOP33X
387 bool "IOP33x-based"
388 depends on MMU
389 select CPU_XSCALE
390 select PLAT_IOP
391 select PCI
392 select GENERIC_GPIO
393 select ARCH_REQUIRE_GPIOLIB
394 help
395 Support for Intel's IOP33X (XScale) family of processors.
397 config ARCH_IXP23XX
398 bool "IXP23XX-based"
399 depends on MMU
400 select CPU_XSC3
401 select PCI
402 help
403 Support for Intel's IXP23xx (XScale) family of processors.
405 config ARCH_IXP2000
406 bool "IXP2400/2800-based"
407 depends on MMU
408 select CPU_XSCALE
409 select PCI
410 help
411 Support for Intel's IXP2400/2800 (XScale) family of processors.
413 config ARCH_IXP4XX
414 bool "IXP4xx-based"
415 depends on MMU
416 select CPU_XSCALE
417 select GENERIC_GPIO
418 select GENERIC_TIME
419 select GENERIC_CLOCKEVENTS
420 select DMABOUNCE if PCI
421 help
422 Support for Intel's IXP4XX (XScale) family of processors.
424 config ARCH_L7200
425 bool "LinkUp-L7200"
426 select CPU_ARM720T
427 select FIQ
428 help
429 Say Y here if you intend to run this kernel on a LinkUp Systems
430 L7200 Software Development Board which uses an ARM720T processor.
431 Information on this board can be obtained at:
433 <http://www.linkupsys.com/>
435 If you have any questions or comments about the Linux kernel port
436 to this board, send e-mail to <sjhill@cotw.com>.
438 config ARCH_DOVE
439 bool "Marvell Dove"
440 select PCI
441 select GENERIC_GPIO
442 select ARCH_REQUIRE_GPIOLIB
443 select GENERIC_TIME
444 select GENERIC_CLOCKEVENTS
445 select PLAT_ORION
446 help
447 Support for the Marvell Dove SoC 88AP510
449 config ARCH_KIRKWOOD
450 bool "Marvell Kirkwood"
451 select CPU_FEROCEON
452 select PCI
453 select GENERIC_GPIO
454 select ARCH_REQUIRE_GPIOLIB
455 select GENERIC_TIME
456 select GENERIC_CLOCKEVENTS
457 select PLAT_ORION
458 help
459 Support for the following Marvell Kirkwood series SoCs:
460 88F6180, 88F6192 and 88F6281.
462 config ARCH_LOKI
463 bool "Marvell Loki (88RC8480)"
464 select CPU_FEROCEON
465 select GENERIC_TIME
466 select GENERIC_CLOCKEVENTS
467 select PLAT_ORION
468 help
469 Support for the Marvell Loki (88RC8480) SoC.
471 config ARCH_MV78XX0
472 bool "Marvell MV78xx0"
473 select CPU_FEROCEON
474 select PCI
475 select GENERIC_GPIO
476 select ARCH_REQUIRE_GPIOLIB
477 select GENERIC_TIME
478 select GENERIC_CLOCKEVENTS
479 select PLAT_ORION
480 help
481 Support for the following Marvell MV78xx0 series SoCs:
482 MV781x0, MV782x0.
484 config ARCH_ORION5X
485 bool "Marvell Orion"
486 depends on MMU
487 select CPU_FEROCEON
488 select PCI
489 select GENERIC_GPIO
490 select ARCH_REQUIRE_GPIOLIB
491 select GENERIC_TIME
492 select GENERIC_CLOCKEVENTS
493 select PLAT_ORION
494 help
495 Support for the following Marvell Orion 5x series SoCs:
496 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
497 Orion-2 (5281), Orion-1-90 (6183).
499 config ARCH_MMP
500 bool "Marvell PXA168/910"
501 depends on MMU
502 select GENERIC_GPIO
503 select ARCH_REQUIRE_GPIOLIB
504 select HAVE_CLK
505 select COMMON_CLKDEV
506 select GENERIC_TIME
507 select GENERIC_CLOCKEVENTS
508 select TICK_ONESHOT
509 select PLAT_PXA
510 help
511 Support for Marvell's PXA168/910 processor line.
513 config ARCH_KS8695
514 bool "Micrel/Kendin KS8695"
515 select CPU_ARM922T
516 select GENERIC_GPIO
517 select ARCH_REQUIRE_GPIOLIB
518 help
519 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
520 System-on-Chip devices.
522 config ARCH_NS9XXX
523 bool "NetSilicon NS9xxx"
524 select CPU_ARM926T
525 select GENERIC_GPIO
526 select GENERIC_TIME
527 select GENERIC_CLOCKEVENTS
528 select HAVE_CLK
529 help
530 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
531 System.
533 <http://www.digi.com/products/microprocessors/index.jsp>
535 config ARCH_W90X900
536 bool "Nuvoton W90X900 CPU"
537 select CPU_ARM926T
538 select ARCH_REQUIRE_GPIOLIB
539 select GENERIC_GPIO
540 select HAVE_CLK
541 select COMMON_CLKDEV
542 select GENERIC_TIME
543 select GENERIC_CLOCKEVENTS
544 help
545 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
546 At present, the w90x900 has been renamed nuc900, regarding
547 the ARM series product line, you can login the following
548 link address to know more.
550 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
551 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
553 config ARCH_PNX4008
554 bool "Philips Nexperia PNX4008 Mobile"
555 select CPU_ARM926T
556 select HAVE_CLK
557 help
558 This enables support for Philips PNX4008 mobile platform.
560 config ARCH_PXA
561 bool "PXA2xx/PXA3xx-based"
562 depends on MMU
563 select ARCH_MTD_XIP
564 select ARCH_HAS_CPUFREQ
565 select GENERIC_GPIO
566 select HAVE_CLK
567 select COMMON_CLKDEV
568 select ARCH_REQUIRE_GPIOLIB
569 select GENERIC_TIME
570 select GENERIC_CLOCKEVENTS
571 select TICK_ONESHOT
572 select PLAT_PXA
573 help
574 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
576 config ARCH_MSM
577 bool "Qualcomm MSM"
578 select CPU_V6
579 select GENERIC_TIME
580 select GENERIC_CLOCKEVENTS
581 help
582 Support for Qualcomm MSM7K based systems. This runs on the ARM11
583 apps processor of the MSM7K and depends on a shared memory
584 interface to the ARM9 modem processor which runs the baseband stack
585 and controls some vital subsystems (clock and power control, etc).
587 config ARCH_RPC
588 bool "RiscPC"
589 select ARCH_ACORN
590 select FIQ
591 select TIMER_ACORN
592 select ARCH_MAY_HAVE_PC_FDC
593 select HAVE_PATA_PLATFORM
594 select ISA_DMA_API
595 select NO_IOPORT
596 select ARCH_SPARSEMEM_ENABLE
597 help
598 On the Acorn Risc-PC, Linux can support the internal IDE disk and
599 CD-ROM interface, serial and parallel port, and the floppy drive.
601 config ARCH_SA1100
602 bool "SA1100-based"
603 select CPU_SA1100
604 select ISA
605 select ARCH_SPARSEMEM_ENABLE
606 select ARCH_MTD_XIP
607 select ARCH_HAS_CPUFREQ
608 select CPU_FREQ
609 select GENERIC_GPIO
610 select GENERIC_TIME
611 select GENERIC_CLOCKEVENTS
612 select HAVE_CLK
613 select TICK_ONESHOT
614 select ARCH_REQUIRE_GPIOLIB
615 help
616 Support for StrongARM 11x0 based boards.
618 config ARCH_S3C2410
619 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
620 select GENERIC_GPIO
621 select ARCH_HAS_CPUFREQ
622 select HAVE_CLK
623 help
624 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
625 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
626 the Samsung SMDK2410 development board (and derivatives).
628 config ARCH_S3C64XX
629 bool "Samsung S3C64XX"
630 select GENERIC_GPIO
631 select HAVE_CLK
632 select ARCH_HAS_CPUFREQ
633 help
634 Samsung S3C64XX series based systems
636 config ARCH_S5PC1XX
637 bool "Samsung S5PC1XX"
638 select GENERIC_GPIO
639 select HAVE_CLK
640 select CPU_V7
641 help
642 Samsung S5PC1XX series based systems
644 config ARCH_SHARK
645 bool "Shark"
646 select CPU_SA110
647 select ISA
648 select ISA_DMA
649 select ZONE_DMA
650 select PCI
651 help
652 Support for the StrongARM based Digital DNARD machine, also known
653 as "Shark" (<http://www.shark-linux.de/shark.html>).
655 config ARCH_LH7A40X
656 bool "Sharp LH7A40X"
657 select CPU_ARM922T
658 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
659 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
660 help
661 Say Y here for systems based on one of the Sharp LH7A40X
662 System on a Chip processors. These CPUs include an ARM922T
663 core with a wide array of integrated devices for
664 hand-held and low-power applications.
666 config ARCH_U300
667 bool "ST-Ericsson U300 Series"
668 depends on MMU
669 select CPU_ARM926T
670 select HAVE_TCM
671 select ARM_AMBA
672 select ARM_VIC
673 select GENERIC_TIME
674 select GENERIC_CLOCKEVENTS
675 select HAVE_CLK
676 select COMMON_CLKDEV
677 select GENERIC_GPIO
678 help
679 Support for ST-Ericsson U300 series mobile platforms.
681 config ARCH_DAVINCI
682 bool "TI DaVinci"
683 select CPU_ARM926T
684 select GENERIC_TIME
685 select GENERIC_CLOCKEVENTS
686 select GENERIC_GPIO
687 select ARCH_REQUIRE_GPIOLIB
688 select HAVE_CLK
689 select ZONE_DMA
690 select HAVE_IDE
691 select COMMON_CLKDEV
692 select GENERIC_ALLOCATOR
693 select ARCH_HAS_HOLES_MEMORYMODEL
694 help
695 Support for TI's DaVinci platform.
697 config ARCH_OMAP
698 bool "TI OMAP"
699 select GENERIC_GPIO
700 select HAVE_CLK
701 select ARCH_REQUIRE_GPIOLIB
702 select ARCH_HAS_CPUFREQ
703 select GENERIC_TIME
704 select GENERIC_CLOCKEVENTS
705 select ARCH_HAS_HOLES_MEMORYMODEL
706 help
707 Support for TI's OMAP platform (OMAP1 and OMAP2).
709 config ARCH_BCMRING
710 bool "Broadcom BCMRING"
711 depends on MMU
712 select CPU_V6
713 select ARM_AMBA
714 select COMMON_CLKDEV
715 select GENERIC_TIME
716 select GENERIC_CLOCKEVENTS
717 select ARCH_WANT_OPTIONAL_GPIOLIB
718 help
719 Support for Broadcom's BCMRing platform.
721 config ARCH_U8500
722 bool "ST-Ericsson U8500 Series"
723 select CPU_V7
724 select ARM_AMBA
725 select GENERIC_TIME
726 select GENERIC_CLOCKEVENTS
727 select COMMON_CLKDEV
728 help
729 Support for ST-Ericsson's Ux500 architecture
731 endchoice
733 source "arch/arm/mach-aaec2000/Kconfig"
735 source "arch/arm/mach-at91/Kconfig"
737 source "arch/arm/mach-bcmring/Kconfig"
739 source "arch/arm/mach-clps711x/Kconfig"
741 source "arch/arm/mach-davinci/Kconfig"
743 source "arch/arm/mach-dove/Kconfig"
745 source "arch/arm/mach-ep93xx/Kconfig"
747 source "arch/arm/mach-footbridge/Kconfig"
749 source "arch/arm/mach-gemini/Kconfig"
751 source "arch/arm/mach-h720x/Kconfig"
753 source "arch/arm/mach-integrator/Kconfig"
755 source "arch/arm/mach-iop32x/Kconfig"
757 source "arch/arm/mach-iop33x/Kconfig"
759 source "arch/arm/mach-iop13xx/Kconfig"
761 source "arch/arm/mach-ixp4xx/Kconfig"
763 source "arch/arm/mach-ixp2000/Kconfig"
765 source "arch/arm/mach-ixp23xx/Kconfig"
767 source "arch/arm/mach-kirkwood/Kconfig"
769 source "arch/arm/mach-ks8695/Kconfig"
771 source "arch/arm/mach-lh7a40x/Kconfig"
773 source "arch/arm/mach-loki/Kconfig"
775 source "arch/arm/mach-msm/Kconfig"
777 source "arch/arm/mach-mv78xx0/Kconfig"
779 source "arch/arm/plat-mxc/Kconfig"
781 source "arch/arm/mach-netx/Kconfig"
783 source "arch/arm/mach-nomadik/Kconfig"
784 source "arch/arm/plat-nomadik/Kconfig"
786 source "arch/arm/mach-ns9xxx/Kconfig"
788 source "arch/arm/plat-omap/Kconfig"
790 source "arch/arm/mach-omap1/Kconfig"
792 source "arch/arm/mach-omap2/Kconfig"
794 source "arch/arm/mach-orion5x/Kconfig"
796 source "arch/arm/mach-pxa/Kconfig"
797 source "arch/arm/plat-pxa/Kconfig"
799 source "arch/arm/mach-mmp/Kconfig"
801 source "arch/arm/mach-realview/Kconfig"
803 source "arch/arm/mach-sa1100/Kconfig"
805 source "arch/arm/plat-samsung/Kconfig"
806 source "arch/arm/plat-s3c24xx/Kconfig"
807 source "arch/arm/plat-s3c64xx/Kconfig"
808 source "arch/arm/plat-s3c/Kconfig"
809 source "arch/arm/plat-s5pc1xx/Kconfig"
811 if ARCH_S3C2410
812 source "arch/arm/mach-s3c2400/Kconfig"
813 source "arch/arm/mach-s3c2410/Kconfig"
814 source "arch/arm/mach-s3c2412/Kconfig"
815 source "arch/arm/mach-s3c2440/Kconfig"
816 source "arch/arm/mach-s3c2442/Kconfig"
817 source "arch/arm/mach-s3c2443/Kconfig"
818 endif
820 if ARCH_S3C64XX
821 source "arch/arm/mach-s3c6400/Kconfig"
822 source "arch/arm/mach-s3c6410/Kconfig"
823 endif
825 source "arch/arm/plat-stmp3xxx/Kconfig"
827 if ARCH_S5PC1XX
828 source "arch/arm/mach-s5pc100/Kconfig"
829 endif
831 source "arch/arm/mach-u300/Kconfig"
833 source "arch/arm/mach-ux500/Kconfig"
835 source "arch/arm/mach-versatile/Kconfig"
837 source "arch/arm/mach-w90x900/Kconfig"
839 # Definitions to make life easier
840 config ARCH_ACORN
841 bool
843 config PLAT_IOP
844 bool
845 select GENERIC_CLOCKEVENTS
846 select GENERIC_TIME
848 config PLAT_ORION
849 bool
851 config PLAT_PXA
852 bool
854 source arch/arm/mm/Kconfig
856 config IWMMXT
857 bool "Enable iWMMXt support"
858 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
859 default y if PXA27x || PXA3xx || ARCH_MMP
860 help
861 Enable support for iWMMXt context switching at run time if
862 running on a CPU that supports it.
864 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
865 config XSCALE_PMU
866 bool
867 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
868 default y
870 if !MMU
871 source "arch/arm/Kconfig-nommu"
872 endif
874 config ARM_ERRATA_411920
875 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
876 depends on CPU_V6 && !SMP
877 help
878 Invalidation of the Instruction Cache operation can
879 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
880 It does not affect the MPCore. This option enables the ARM Ltd.
881 recommended workaround.
883 config ARM_ERRATA_430973
884 bool "ARM errata: Stale prediction on replaced interworking branch"
885 depends on CPU_V7
886 help
887 This option enables the workaround for the 430973 Cortex-A8
888 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
889 interworking branch is replaced with another code sequence at the
890 same virtual address, whether due to self-modifying code or virtual
891 to physical address re-mapping, Cortex-A8 does not recover from the
892 stale interworking branch prediction. This results in Cortex-A8
893 executing the new code sequence in the incorrect ARM or Thumb state.
894 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
895 and also flushes the branch target cache at every context switch.
896 Note that setting specific bits in the ACTLR register may not be
897 available in non-secure mode.
899 config ARM_ERRATA_458693
900 bool "ARM errata: Processor deadlock when a false hazard is created"
901 depends on CPU_V7
902 help
903 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
904 erratum. For very specific sequences of memory operations, it is
905 possible for a hazard condition intended for a cache line to instead
906 be incorrectly associated with a different cache line. This false
907 hazard might then cause a processor deadlock. The workaround enables
908 the L1 caching of the NEON accesses and disables the PLD instruction
909 in the ACTLR register. Note that setting specific bits in the ACTLR
910 register may not be available in non-secure mode.
912 config ARM_ERRATA_460075
913 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
914 depends on CPU_V7
915 help
916 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
917 erratum. Any asynchronous access to the L2 cache may encounter a
918 situation in which recent store transactions to the L2 cache are lost
919 and overwritten with stale memory contents from external memory. The
920 workaround disables the write-allocate mode for the L2 cache via the
921 ACTLR register. Note that setting specific bits in the ACTLR register
922 may not be available in non-secure mode.
924 endmenu
926 source "arch/arm/common/Kconfig"
928 config FORCE_MAX_ZONEORDER
929 int
930 depends on SA1111
931 default "9"
933 menu "Bus support"
935 config ARM_AMBA
936 bool
938 config ISA
939 bool
940 help
941 Find out whether you have ISA slots on your motherboard. ISA is the
942 name of a bus system, i.e. the way the CPU talks to the other stuff
943 inside your box. Other bus systems are PCI, EISA, MicroChannel
944 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
945 newer boards don't support it. If you have ISA, say Y, otherwise N.
947 # Select ISA DMA controller support
948 config ISA_DMA
949 bool
950 select ISA_DMA_API
952 # Select ISA DMA interface
953 config ISA_DMA_API
954 bool
956 config PCI
957 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
958 help
959 Find out whether you have a PCI motherboard. PCI is the name of a
960 bus system, i.e. the way the CPU talks to the other stuff inside
961 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
962 VESA. If you have PCI, say Y, otherwise N.
964 config PCI_SYSCALL
965 def_bool PCI
967 # Select the host bridge type
968 config PCI_HOST_VIA82C505
969 bool
970 depends on PCI && ARCH_SHARK
971 default y
973 config PCI_HOST_ITE8152
974 bool
975 depends on PCI && MACH_ARMCORE
976 default y
977 select DMABOUNCE
979 source "drivers/pci/Kconfig"
981 source "drivers/pcmcia/Kconfig"
983 endmenu
985 menu "Kernel Features"
987 source "kernel/time/Kconfig"
989 config SMP
990 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
991 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
992 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
993 depends on GENERIC_CLOCKEVENTS
994 select USE_GENERIC_SMP_HELPERS
995 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
996 help
997 This enables support for systems with more than one CPU. If you have
998 a system with only one CPU, like most personal computers, say N. If
999 you have a system with more than one CPU, say Y.
1001 If you say N here, the kernel will run on single and multiprocessor
1002 machines, but will use only one CPU of a multiprocessor machine. If
1003 you say Y here, the kernel will run on many, but not all, single
1004 processor machines. On a single processor machine, the kernel will
1005 run faster if you say N here.
1007 See also <file:Documentation/i386/IO-APIC.txt>,
1008 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1009 <http://www.linuxdoc.org/docs.html#howto>.
1011 If you don't know what to do here, say N.
1013 config HAVE_ARM_SCU
1014 bool
1015 depends on SMP
1016 help
1017 This option enables support for the ARM system coherency unit
1019 config HAVE_ARM_TWD
1020 bool
1021 depends on SMP
1022 help
1023 This options enables support for the ARM timer and watchdog unit
1025 choice
1026 prompt "Memory split"
1027 default VMSPLIT_3G
1028 help
1029 Select the desired split between kernel and user memory.
1031 If you are not absolutely sure what you are doing, leave this
1032 option alone!
1034 config VMSPLIT_3G
1035 bool "3G/1G user/kernel split"
1036 config VMSPLIT_2G
1037 bool "2G/2G user/kernel split"
1038 config VMSPLIT_1G
1039 bool "1G/3G user/kernel split"
1040 endchoice
1042 config PAGE_OFFSET
1043 hex
1044 default 0x40000000 if VMSPLIT_1G
1045 default 0x80000000 if VMSPLIT_2G
1046 default 0xC0000000
1048 config NR_CPUS
1049 int "Maximum number of CPUs (2-32)"
1050 range 2 32
1051 depends on SMP
1052 default "4"
1054 config HOTPLUG_CPU
1055 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1056 depends on SMP && HOTPLUG && EXPERIMENTAL
1057 help
1058 Say Y here to experiment with turning CPUs off and on. CPUs
1059 can be controlled through /sys/devices/system/cpu.
1061 config LOCAL_TIMERS
1062 bool "Use local timer interrupts"
1063 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1064 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1065 default y
1066 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1067 help
1068 Enable support for local timers on SMP platforms, rather then the
1069 legacy IPI broadcast method. Local timers allows the system
1070 accounting to be spread across the timer interval, preventing a
1071 "thundering herd" at every timer tick.
1073 source kernel/Kconfig.preempt
1075 config HZ
1076 int
1077 default 128 if ARCH_L7200
1078 default 200 if ARCH_EBSA110 || ARCH_S3C2410
1079 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1080 default AT91_TIMER_HZ if ARCH_AT91
1081 default 100
1083 config THUMB2_KERNEL
1084 bool "Compile the kernel in Thumb-2 mode"
1085 depends on CPU_V7 && EXPERIMENTAL
1086 select AEABI
1087 select ARM_ASM_UNIFIED
1088 help
1089 By enabling this option, the kernel will be compiled in
1090 Thumb-2 mode. A compiler/assembler that understand the unified
1091 ARM-Thumb syntax is needed.
1093 If unsure, say N.
1095 config ARM_ASM_UNIFIED
1096 bool
1098 config AEABI
1099 bool "Use the ARM EABI to compile the kernel"
1100 help
1101 This option allows for the kernel to be compiled using the latest
1102 ARM ABI (aka EABI). This is only useful if you are using a user
1103 space environment that is also compiled with EABI.
1105 Since there are major incompatibilities between the legacy ABI and
1106 EABI, especially with regard to structure member alignment, this
1107 option also changes the kernel syscall calling convention to
1108 disambiguate both ABIs and allow for backward compatibility support
1109 (selected with CONFIG_OABI_COMPAT).
1111 To use this you need GCC version 4.0.0 or later.
1113 config OABI_COMPAT
1114 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1115 depends on AEABI && EXPERIMENTAL
1116 default y
1117 help
1118 This option preserves the old syscall interface along with the
1119 new (ARM EABI) one. It also provides a compatibility layer to
1120 intercept syscalls that have structure arguments which layout
1121 in memory differs between the legacy ABI and the new ARM EABI
1122 (only for non "thumb" binaries). This option adds a tiny
1123 overhead to all syscalls and produces a slightly larger kernel.
1124 If you know you'll be using only pure EABI user space then you
1125 can say N here. If this option is not selected and you attempt
1126 to execute a legacy ABI binary then the result will be
1127 UNPREDICTABLE (in fact it can be predicted that it won't work
1128 at all). If in doubt say Y.
1130 config ARCH_HAS_HOLES_MEMORYMODEL
1131 bool
1133 # Discontigmem is deprecated
1134 config ARCH_DISCONTIGMEM_ENABLE
1135 bool
1137 config ARCH_SPARSEMEM_ENABLE
1138 bool
1140 config ARCH_SPARSEMEM_DEFAULT
1141 def_bool ARCH_SPARSEMEM_ENABLE
1143 config ARCH_SELECT_MEMORY_MODEL
1144 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1146 config NODES_SHIFT
1147 int
1148 default "4" if ARCH_LH7A40X
1149 default "2"
1150 depends on NEED_MULTIPLE_NODES
1152 config HIGHMEM
1153 bool "High Memory Support (EXPERIMENTAL)"
1154 depends on MMU && EXPERIMENTAL
1155 help
1156 The address space of ARM processors is only 4 Gigabytes large
1157 and it has to accommodate user address space, kernel address
1158 space as well as some memory mapped IO. That means that, if you
1159 have a large amount of physical memory and/or IO, not all of the
1160 memory can be "permanently mapped" by the kernel. The physical
1161 memory that is not permanently mapped is called "high memory".
1163 Depending on the selected kernel/user memory split, minimum
1164 vmalloc space and actual amount of RAM, you may not need this
1165 option which should result in a slightly faster kernel.
1167 If unsure, say n.
1169 config HIGHPTE
1170 bool "Allocate 2nd-level pagetables from highmem"
1171 depends on HIGHMEM
1172 depends on !OUTER_CACHE
1174 source "mm/Kconfig"
1176 config LEDS
1177 bool "Timer and CPU usage LEDs"
1178 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1179 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1180 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1181 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1182 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1183 ARCH_AT91 || ARCH_DAVINCI || \
1184 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1185 help
1186 If you say Y here, the LEDs on your machine will be used
1187 to provide useful information about your current system status.
1189 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1190 be able to select which LEDs are active using the options below. If
1191 you are compiling a kernel for the EBSA-110 or the LART however, the
1192 red LED will simply flash regularly to indicate that the system is
1193 still functional. It is safe to say Y here if you have a CATS
1194 system, but the driver will do nothing.
1196 config LEDS_TIMER
1197 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1198 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1199 || MACH_OMAP_PERSEUS2
1200 depends on LEDS
1201 depends on !GENERIC_CLOCKEVENTS
1202 default y if ARCH_EBSA110
1203 help
1204 If you say Y here, one of the system LEDs (the green one on the
1205 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1206 will flash regularly to indicate that the system is still
1207 operational. This is mainly useful to kernel hackers who are
1208 debugging unstable kernels.
1210 The LART uses the same LED for both Timer LED and CPU usage LED
1211 functions. You may choose to use both, but the Timer LED function
1212 will overrule the CPU usage LED.
1214 config LEDS_CPU
1215 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1216 !ARCH_OMAP) \
1217 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1218 || MACH_OMAP_PERSEUS2
1219 depends on LEDS
1220 help
1221 If you say Y here, the red LED will be used to give a good real
1222 time indication of CPU usage, by lighting whenever the idle task
1223 is not currently executing.
1225 The LART uses the same LED for both Timer LED and CPU usage LED
1226 functions. You may choose to use both, but the Timer LED function
1227 will overrule the CPU usage LED.
1229 config ALIGNMENT_TRAP
1230 bool
1231 depends on CPU_CP15_MMU
1232 default y if !ARCH_EBSA110
1233 help
1234 ARM processors cannot fetch/store information which is not
1235 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1236 address divisible by 4. On 32-bit ARM processors, these non-aligned
1237 fetch/store instructions will be emulated in software if you say
1238 here, which has a severe performance impact. This is necessary for
1239 correct operation of some network protocols. With an IP-only
1240 configuration it is safe to say N, otherwise say Y.
1242 config UACCESS_WITH_MEMCPY
1243 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1244 depends on MMU && EXPERIMENTAL
1245 default y if CPU_FEROCEON
1246 help
1247 Implement faster copy_to_user and clear_user methods for CPU
1248 cores where a 8-word STM instruction give significantly higher
1249 memory write throughput than a sequence of individual 32bit stores.
1251 A possible side effect is a slight increase in scheduling latency
1252 between threads sharing the same address space if they invoke
1253 such copy operations with large buffers.
1255 However, if the CPU data cache is using a write-allocate mode,
1256 this option is unlikely to provide any performance gain.
1258 endmenu
1260 menu "Boot options"
1262 # Compressed boot loader in ROM. Yes, we really want to ask about
1263 # TEXT and BSS so we preserve their values in the config files.
1264 config ZBOOT_ROM_TEXT
1265 hex "Compressed ROM boot loader base address"
1266 default "0"
1267 help
1268 The physical address at which the ROM-able zImage is to be
1269 placed in the target. Platforms which normally make use of
1270 ROM-able zImage formats normally set this to a suitable
1271 value in their defconfig file.
1273 If ZBOOT_ROM is not enabled, this has no effect.
1275 config ZBOOT_ROM_BSS
1276 hex "Compressed ROM boot loader BSS address"
1277 default "0"
1278 help
1279 The base address of an area of read/write memory in the target
1280 for the ROM-able zImage which must be available while the
1281 decompressor is running. It must be large enough to hold the
1282 entire decompressed kernel plus an additional 128 KiB.
1283 Platforms which normally make use of ROM-able zImage formats
1284 normally set this to a suitable value in their defconfig file.
1286 If ZBOOT_ROM is not enabled, this has no effect.
1288 config ZBOOT_ROM
1289 bool "Compressed boot loader in ROM/flash"
1290 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1291 help
1292 Say Y here if you intend to execute your compressed kernel image
1293 (zImage) directly from ROM or flash. If unsure, say N.
1295 config CMDLINE
1296 string "Default kernel command string"
1297 default ""
1298 help
1299 On some architectures (EBSA110 and CATS), there is currently no way
1300 for the boot loader to pass arguments to the kernel. For these
1301 architectures, you should supply some command-line options at build
1302 time by entering them here. As a minimum, you should specify the
1303 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1305 config XIP_KERNEL
1306 bool "Kernel Execute-In-Place from ROM"
1307 depends on !ZBOOT_ROM
1308 help
1309 Execute-In-Place allows the kernel to run from non-volatile storage
1310 directly addressable by the CPU, such as NOR flash. This saves RAM
1311 space since the text section of the kernel is not loaded from flash
1312 to RAM. Read-write sections, such as the data section and stack,
1313 are still copied to RAM. The XIP kernel is not compressed since
1314 it has to run directly from flash, so it will take more space to
1315 store it. The flash address used to link the kernel object files,
1316 and for storing it, is configuration dependent. Therefore, if you
1317 say Y here, you must know the proper physical address where to
1318 store the kernel image depending on your own flash memory usage.
1320 Also note that the make target becomes "make xipImage" rather than
1321 "make zImage" or "make Image". The final kernel binary to put in
1322 ROM memory will be arch/arm/boot/xipImage.
1324 If unsure, say N.
1326 config XIP_PHYS_ADDR
1327 hex "XIP Kernel Physical Location"
1328 depends on XIP_KERNEL
1329 default "0x00080000"
1330 help
1331 This is the physical address in your flash memory the kernel will
1332 be linked for and stored to. This address is dependent on your
1333 own flash usage.
1335 config KEXEC
1336 bool "Kexec system call (EXPERIMENTAL)"
1337 depends on EXPERIMENTAL
1338 help
1339 kexec is a system call that implements the ability to shutdown your
1340 current kernel, and to start another kernel. It is like a reboot
1341 but it is independent of the system firmware. And like a reboot
1342 you can start any kernel with it, not just Linux.
1344 It is an ongoing process to be certain the hardware in a machine
1345 is properly shutdown, so do not be surprised if this code does not
1346 initially work for you. It may help to enable device hotplugging
1347 support.
1349 config ATAGS_PROC
1350 bool "Export atags in procfs"
1351 depends on KEXEC
1352 default y
1353 help
1354 Should the atags used to boot the kernel be exported in an "atags"
1355 file in procfs. Useful with kexec.
1357 endmenu
1359 menu "CPU Power Management"
1361 if ARCH_HAS_CPUFREQ
1363 source "drivers/cpufreq/Kconfig"
1365 config CPU_FREQ_SA1100
1366 bool
1368 config CPU_FREQ_SA1110
1369 bool
1371 config CPU_FREQ_INTEGRATOR
1372 tristate "CPUfreq driver for ARM Integrator CPUs"
1373 depends on ARCH_INTEGRATOR && CPU_FREQ
1374 default y
1375 help
1376 This enables the CPUfreq driver for ARM Integrator CPUs.
1378 For details, take a look at <file:Documentation/cpu-freq>.
1380 If in doubt, say Y.
1382 config CPU_FREQ_PXA
1383 bool
1384 depends on CPU_FREQ && ARCH_PXA && PXA25x
1385 default y
1386 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1388 config CPU_FREQ_S3C64XX
1389 bool "CPUfreq support for Samsung S3C64XX CPUs"
1390 depends on CPU_FREQ && CPU_S3C6410
1392 config CPU_FREQ_S3C
1393 bool
1394 help
1395 Internal configuration node for common cpufreq on Samsung SoC
1397 config CPU_FREQ_S3C24XX
1398 bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1399 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1400 select CPU_FREQ_S3C
1401 help
1402 This enables the CPUfreq driver for the Samsung S3C24XX family
1403 of CPUs.
1405 For details, take a look at <file:Documentation/cpu-freq>.
1407 If in doubt, say N.
1409 config CPU_FREQ_S3C24XX_PLL
1410 bool "Support CPUfreq changing of PLL frequency"
1411 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1412 help
1413 Compile in support for changing the PLL frequency from the
1414 S3C24XX series CPUfreq driver. The PLL takes time to settle
1415 after a frequency change, so by default it is not enabled.
1417 This also means that the PLL tables for the selected CPU(s) will
1418 be built which may increase the size of the kernel image.
1420 config CPU_FREQ_S3C24XX_DEBUG
1421 bool "Debug CPUfreq Samsung driver core"
1422 depends on CPU_FREQ_S3C24XX
1423 help
1424 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1426 config CPU_FREQ_S3C24XX_IODEBUG
1427 bool "Debug CPUfreq Samsung driver IO timing"
1428 depends on CPU_FREQ_S3C24XX
1429 help
1430 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1432 config CPU_FREQ_S3C24XX_DEBUGFS
1433 bool "Export debugfs for CPUFreq"
1434 depends on CPU_FREQ_S3C24XX && DEBUG_FS
1435 help
1436 Export status information via debugfs.
1438 endif
1440 source "drivers/cpuidle/Kconfig"
1442 endmenu
1444 menu "Floating point emulation"
1446 comment "At least one emulation must be selected"
1448 config FPE_NWFPE
1449 bool "NWFPE math emulation"
1450 depends on !AEABI || OABI_COMPAT
1451 ---help---
1452 Say Y to include the NWFPE floating point emulator in the kernel.
1453 This is necessary to run most binaries. Linux does not currently
1454 support floating point hardware so you need to say Y here even if
1455 your machine has an FPA or floating point co-processor podule.
1457 You may say N here if you are going to load the Acorn FPEmulator
1458 early in the bootup.
1460 config FPE_NWFPE_XP
1461 bool "Support extended precision"
1462 depends on FPE_NWFPE
1463 help
1464 Say Y to include 80-bit support in the kernel floating-point
1465 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1466 Note that gcc does not generate 80-bit operations by default,
1467 so in most cases this option only enlarges the size of the
1468 floating point emulator without any good reason.
1470 You almost surely want to say N here.
1472 config FPE_FASTFPE
1473 bool "FastFPE math emulation (EXPERIMENTAL)"
1474 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1475 ---help---
1476 Say Y here to include the FAST floating point emulator in the kernel.
1477 This is an experimental much faster emulator which now also has full
1478 precision for the mantissa. It does not support any exceptions.
1479 It is very simple, and approximately 3-6 times faster than NWFPE.
1481 It should be sufficient for most programs. It may be not suitable
1482 for scientific calculations, but you have to check this for yourself.
1483 If you do not feel you need a faster FP emulation you should better
1484 choose NWFPE.
1486 config VFP
1487 bool "VFP-format floating point maths"
1488 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1489 help
1490 Say Y to include VFP support code in the kernel. This is needed
1491 if your hardware includes a VFP unit.
1493 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1494 release notes and additional status information.
1496 Say N if your target does not have VFP hardware.
1498 config VFPv3
1499 bool
1500 depends on VFP
1501 default y if CPU_V7
1503 config NEON
1504 bool "Advanced SIMD (NEON) Extension support"
1505 depends on VFPv3 && CPU_V7
1506 help
1507 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1508 Extension.
1510 endmenu
1512 menu "Userspace binary formats"
1514 source "fs/Kconfig.binfmt"
1516 config ARTHUR
1517 tristate "RISC OS personality"
1518 depends on !AEABI
1519 help
1520 Say Y here to include the kernel code necessary if you want to run
1521 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1522 experimental; if this sounds frightening, say N and sleep in peace.
1523 You can also say M here to compile this support as a module (which
1524 will be called arthur).
1526 endmenu
1528 menu "Power management options"
1530 source "kernel/power/Kconfig"
1532 config ARCH_SUSPEND_POSSIBLE
1533 def_bool y
1535 endmenu
1537 source "net/Kconfig"
1539 source "drivers/Kconfig"
1541 source "fs/Kconfig"
1543 source "arch/arm/Kconfig.debug"
1545 source "security/Kconfig"
1547 source "crypto/Kconfig"
1549 source "lib/Kconfig"