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iop: clockevent support
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1#
2# For a description of the syntax of this configuration file,
3# see Documentation/kbuild/kconfig-language.txt.
4#
5
6mainmenu "Linux Kernel Configuration"
7
8config 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/>.
28
29config HAVE_PWM
30 bool
31
32config SYS_SUPPORTS_APM_EMULATION
33 bool
34
35config GENERIC_GPIO
36 bool
37
38config GENERIC_TIME
39 bool
40
41config GENERIC_CLOCKEVENTS
42 bool
43
44config GENERIC_CLOCKEVENTS_BROADCAST
45 bool
46 depends on GENERIC_CLOCKEVENTS
47 default y if SMP && !LOCAL_TIMERS
48
49config HAVE_TCM
50 bool
51 select GENERIC_ALLOCATOR
52
53config NO_IOPORT
54 bool
55
56config 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.
61
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.
66
67 Say Y here if you are building a kernel for an EISA-based machine.
68
69 Otherwise, say N.
70
71config SBUS
72 bool
73
74config 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.
81
82config GENERIC_HARDIRQS
83 bool
84 default y
85
86config STACKTRACE_SUPPORT
87 bool
88 default y
89
90config HAVE_LATENCYTOP_SUPPORT
91 bool
92 depends on !SMP
93 default y
94
95config LOCKDEP_SUPPORT
96 bool
97 default y
98
99config TRACE_IRQFLAGS_SUPPORT
100 bool
101 default y
102
103config HARDIRQS_SW_RESEND
104 bool
105 default y
106
107config GENERIC_IRQ_PROBE
108 bool
109 default y
110
111config GENERIC_LOCKBREAK
112 bool
113 default y
114 depends on SMP && PREEMPT
115
116config RWSEM_GENERIC_SPINLOCK
117 bool
118 default y
119
120config RWSEM_XCHGADD_ALGORITHM
121 bool
122
123config ARCH_HAS_ILOG2_U32
124 bool
125
126config ARCH_HAS_ILOG2_U64
127 bool
128
129config 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.
135
136config GENERIC_HWEIGHT
137 bool
138 default y
139
140config GENERIC_CALIBRATE_DELAY
141 bool
142 default y
143
144config ARCH_MAY_HAVE_PC_FDC
145 bool
146
147config ZONE_DMA
148 bool
149
150config GENERIC_ISA_DMA
151 bool
152
153config FIQ
154 bool
155
156config ARCH_MTD_XIP
157 bool
158
159config GENERIC_HARDIRQS_NO__DO_IRQ
160 def_bool y
161
162if OPROFILE
163
164config OPROFILE_ARMV6
165 def_bool y
166 depends on CPU_V6 && !SMP
167 select OPROFILE_ARM11_CORE
168
169config OPROFILE_MPCORE
170 def_bool y
171 depends on CPU_V6 && SMP
172 select OPROFILE_ARM11_CORE
173
174config OPROFILE_ARM11_CORE
175 bool
176
177config OPROFILE_ARMV7
178 def_bool y
179 depends on CPU_V7 && !SMP
180 bool
181
182endif
183
184config 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.
191
192source "init/Kconfig"
193
194source "kernel/Kconfig.freezer"
195
196menu "System Type"
197
198config 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'.
204
205choice
206 prompt "ARM system type"
207 default ARCH_VERSATILE
208
209config 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
216
217config 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.
226
227config 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.
238
239config 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.
251
252config 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.
260
261config ARCH_CLPS711X
262 bool "Cirrus Logic CLPS711x/EP721x-based"
263 select CPU_ARM720T
264 help
265 Support for Cirrus Logic 711x/721x based boards.
266
267config 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
274
275config 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.
285
286config 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.
298
299config 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.
306
307config 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
317
318config 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.
330
331config 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
339
340config 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
346
347config 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
360
361config 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.
371
372config 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.
383
384config 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.
394
395config 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.
402
403config 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.
410
411config 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.
421
422config 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:
430
431 <http://www.linkupsys.com/>
432
433 If you have any questions or comments about the Linux kernel port
434 to this board, send e-mail to <sjhill@cotw.com>.
435
436config ARCH_KIRKWOOD
437 bool "Marvell Kirkwood"
438 select CPU_FEROCEON
439 select PCI
440 select GENERIC_GPIO
441 select ARCH_REQUIRE_GPIOLIB
442 select GENERIC_TIME
443 select GENERIC_CLOCKEVENTS
444 select PLAT_ORION
445 help
446 Support for the following Marvell Kirkwood series SoCs:
447 88F6180, 88F6192 and 88F6281.
448
449config ARCH_LOKI
450 bool "Marvell Loki (88RC8480)"
451 select CPU_FEROCEON
452 select GENERIC_TIME
453 select GENERIC_CLOCKEVENTS
454 select PLAT_ORION
455 help
456 Support for the Marvell Loki (88RC8480) SoC.
457
458config ARCH_MV78XX0
459 bool "Marvell MV78xx0"
460 select CPU_FEROCEON
461 select PCI
462 select GENERIC_GPIO
463 select ARCH_REQUIRE_GPIOLIB
464 select GENERIC_TIME
465 select GENERIC_CLOCKEVENTS
466 select PLAT_ORION
467 help
468 Support for the following Marvell MV78xx0 series SoCs:
469 MV781x0, MV782x0.
470
471config ARCH_ORION5X
472 bool "Marvell Orion"
473 depends on MMU
474 select CPU_FEROCEON
475 select PCI
476 select GENERIC_GPIO
477 select ARCH_REQUIRE_GPIOLIB
478 select GENERIC_TIME
479 select GENERIC_CLOCKEVENTS
480 select PLAT_ORION
481 help
482 Support for the following Marvell Orion 5x series SoCs:
483 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
484 Orion-2 (5281), Orion-1-90 (6183).
485
486config ARCH_MMP
487 bool "Marvell PXA168/910"
488 depends on MMU
489 select GENERIC_GPIO
490 select ARCH_REQUIRE_GPIOLIB
491 select HAVE_CLK
492 select COMMON_CLKDEV
493 select GENERIC_TIME
494 select GENERIC_CLOCKEVENTS
495 select TICK_ONESHOT
496 select PLAT_PXA
497 help
498 Support for Marvell's PXA168/910 processor line.
499
500config ARCH_KS8695
501 bool "Micrel/Kendin KS8695"
502 select CPU_ARM922T
503 select GENERIC_GPIO
504 select ARCH_REQUIRE_GPIOLIB
505 help
506 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
507 System-on-Chip devices.
508
509config ARCH_NS9XXX
510 bool "NetSilicon NS9xxx"
511 select CPU_ARM926T
512 select GENERIC_GPIO
513 select GENERIC_TIME
514 select GENERIC_CLOCKEVENTS
515 select HAVE_CLK
516 help
517 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
518 System.
519
520 <http://www.digi.com/products/microprocessors/index.jsp>
521
522config ARCH_W90X900
523 bool "Nuvoton W90X900 CPU"
524 select CPU_ARM926T
525 select ARCH_REQUIRE_GPIOLIB
526 select GENERIC_GPIO
527 select HAVE_CLK
528 select COMMON_CLKDEV
529 select GENERIC_TIME
530 select GENERIC_CLOCKEVENTS
531 help
532 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
533 At present, the w90x900 has been renamed nuc900, regarding
534 the ARM series product line, you can login the following
535 link address to know more.
536
537 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
538 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
539
540config ARCH_PNX4008
541 bool "Philips Nexperia PNX4008 Mobile"
542 select CPU_ARM926T
543 select HAVE_CLK
544 help
545 This enables support for Philips PNX4008 mobile platform.
546
547config ARCH_PXA
548 bool "PXA2xx/PXA3xx-based"
549 depends on MMU
550 select ARCH_MTD_XIP
551 select ARCH_HAS_CPUFREQ
552 select GENERIC_GPIO
553 select HAVE_CLK
554 select COMMON_CLKDEV
555 select ARCH_REQUIRE_GPIOLIB
556 select GENERIC_TIME
557 select GENERIC_CLOCKEVENTS
558 select TICK_ONESHOT
559 select PLAT_PXA
560 help
561 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
562
563config ARCH_MSM
564 bool "Qualcomm MSM"
565 select CPU_V6
566 select GENERIC_TIME
567 select GENERIC_CLOCKEVENTS
568 help
569 Support for Qualcomm MSM7K based systems. This runs on the ARM11
570 apps processor of the MSM7K and depends on a shared memory
571 interface to the ARM9 modem processor which runs the baseband stack
572 and controls some vital subsystems (clock and power control, etc).
573
574config ARCH_RPC
575 bool "RiscPC"
576 select ARCH_ACORN
577 select FIQ
578 select TIMER_ACORN
579 select ARCH_MAY_HAVE_PC_FDC
580 select HAVE_PATA_PLATFORM
581 select ISA_DMA_API
582 select NO_IOPORT
583 select ARCH_SPARSEMEM_ENABLE
584 help
585 On the Acorn Risc-PC, Linux can support the internal IDE disk and
586 CD-ROM interface, serial and parallel port, and the floppy drive.
587
588config ARCH_SA1100
589 bool "SA1100-based"
590 select CPU_SA1100
591 select ISA
592 select ARCH_SPARSEMEM_ENABLE
593 select ARCH_MTD_XIP
594 select ARCH_HAS_CPUFREQ
595 select GENERIC_GPIO
596 select GENERIC_TIME
597 select GENERIC_CLOCKEVENTS
598 select HAVE_CLK
599 select TICK_ONESHOT
600 select ARCH_REQUIRE_GPIOLIB
601 help
602 Support for StrongARM 11x0 based boards.
603
604config ARCH_S3C2410
605 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
606 select GENERIC_GPIO
607 select ARCH_HAS_CPUFREQ
608 select HAVE_CLK
609 help
610 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
611 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
612 the Samsung SMDK2410 development board (and derivatives).
613
614config ARCH_S3C64XX
615 bool "Samsung S3C64XX"
616 select GENERIC_GPIO
617 select HAVE_CLK
618 select ARCH_HAS_CPUFREQ
619 help
620 Samsung S3C64XX series based systems
621
622config ARCH_S5PC1XX
623 bool "Samsung S5PC1XX"
624 select GENERIC_GPIO
625 select HAVE_CLK
626 select CPU_V7
627 help
628 Samsung S5PC1XX series based systems
629
630config ARCH_SHARK
631 bool "Shark"
632 select CPU_SA110
633 select ISA
634 select ISA_DMA
635 select ZONE_DMA
636 select PCI
637 help
638 Support for the StrongARM based Digital DNARD machine, also known
639 as "Shark" (<http://www.shark-linux.de/shark.html>).
640
641config ARCH_LH7A40X
642 bool "Sharp LH7A40X"
643 select CPU_ARM922T
644 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
645 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
646 help
647 Say Y here for systems based on one of the Sharp LH7A40X
648 System on a Chip processors. These CPUs include an ARM922T
649 core with a wide array of integrated devices for
650 hand-held and low-power applications.
651
652config ARCH_U300
653 bool "ST-Ericsson U300 Series"
654 depends on MMU
655 select CPU_ARM926T
656 select HAVE_TCM
657 select ARM_AMBA
658 select ARM_VIC
659 select GENERIC_TIME
660 select GENERIC_CLOCKEVENTS
661 select HAVE_CLK
662 select COMMON_CLKDEV
663 select GENERIC_GPIO
664 help
665 Support for ST-Ericsson U300 series mobile platforms.
666
667config ARCH_DAVINCI
668 bool "TI DaVinci"
669 select CPU_ARM926T
670 select GENERIC_TIME
671 select GENERIC_CLOCKEVENTS
672 select GENERIC_GPIO
673 select ARCH_REQUIRE_GPIOLIB
674 select HAVE_CLK
675 select ZONE_DMA
676 select HAVE_IDE
677 select COMMON_CLKDEV
678 select GENERIC_ALLOCATOR
679 help
680 Support for TI's DaVinci platform.
681
682config ARCH_OMAP
683 bool "TI OMAP"
684 select GENERIC_GPIO
685 select HAVE_CLK
686 select ARCH_REQUIRE_GPIOLIB
687 select ARCH_HAS_CPUFREQ
688 select GENERIC_TIME
689 select GENERIC_CLOCKEVENTS
690 help
691 Support for TI's OMAP platform (OMAP1 and OMAP2).
692
693config ARCH_BCMRING
694 bool "Broadcom BCMRING"
695 depends on MMU
696 select CPU_V6
697 select ARM_AMBA
698 select COMMON_CLKDEV
699 select GENERIC_TIME
700 select GENERIC_CLOCKEVENTS
701 select ARCH_WANT_OPTIONAL_GPIOLIB
702 help
703 Support for Broadcom's BCMRing platform.
704
705endchoice
706
707source "arch/arm/mach-clps711x/Kconfig"
708
709source "arch/arm/mach-ep93xx/Kconfig"
710
711source "arch/arm/mach-footbridge/Kconfig"
712
713source "arch/arm/mach-gemini/Kconfig"
714
715source "arch/arm/mach-integrator/Kconfig"
716
717source "arch/arm/mach-iop32x/Kconfig"
718
719source "arch/arm/mach-iop33x/Kconfig"
720
721source "arch/arm/mach-iop13xx/Kconfig"
722
723source "arch/arm/mach-ixp4xx/Kconfig"
724
725source "arch/arm/mach-ixp2000/Kconfig"
726
727source "arch/arm/mach-ixp23xx/Kconfig"
728
729source "arch/arm/mach-loki/Kconfig"
730
731source "arch/arm/mach-mv78xx0/Kconfig"
732
733source "arch/arm/mach-pxa/Kconfig"
734source "arch/arm/plat-pxa/Kconfig"
735
736source "arch/arm/mach-mmp/Kconfig"
737
738source "arch/arm/mach-sa1100/Kconfig"
739
740source "arch/arm/plat-omap/Kconfig"
741
742source "arch/arm/mach-omap1/Kconfig"
743
744source "arch/arm/mach-omap2/Kconfig"
745
746source "arch/arm/mach-orion5x/Kconfig"
747
748source "arch/arm/mach-kirkwood/Kconfig"
749
750source "arch/arm/plat-s3c24xx/Kconfig"
751source "arch/arm/plat-s3c64xx/Kconfig"
752source "arch/arm/plat-s3c/Kconfig"
753source "arch/arm/plat-s5pc1xx/Kconfig"
754
755if ARCH_S3C2410
756source "arch/arm/mach-s3c2400/Kconfig"
757source "arch/arm/mach-s3c2410/Kconfig"
758source "arch/arm/mach-s3c2412/Kconfig"
759source "arch/arm/mach-s3c2440/Kconfig"
760source "arch/arm/mach-s3c2442/Kconfig"
761source "arch/arm/mach-s3c2443/Kconfig"
762endif
763
764if ARCH_S3C64XX
765source "arch/arm/mach-s3c6400/Kconfig"
766source "arch/arm/mach-s3c6410/Kconfig"
767endif
768
769source "arch/arm/plat-stmp3xxx/Kconfig"
770
771if ARCH_S5PC1XX
772source "arch/arm/mach-s5pc100/Kconfig"
773endif
774
775source "arch/arm/mach-lh7a40x/Kconfig"
776
777source "arch/arm/mach-h720x/Kconfig"
778
779source "arch/arm/mach-versatile/Kconfig"
780
781source "arch/arm/mach-aaec2000/Kconfig"
782
783source "arch/arm/mach-realview/Kconfig"
784
785source "arch/arm/mach-at91/Kconfig"
786
787source "arch/arm/plat-mxc/Kconfig"
788
789source "arch/arm/mach-nomadik/Kconfig"
790
791source "arch/arm/mach-netx/Kconfig"
792
793source "arch/arm/mach-ns9xxx/Kconfig"
794
795source "arch/arm/mach-davinci/Kconfig"
796
797source "arch/arm/mach-ks8695/Kconfig"
798
799source "arch/arm/mach-msm/Kconfig"
800
801source "arch/arm/mach-u300/Kconfig"
802
803source "arch/arm/mach-w90x900/Kconfig"
804
805source "arch/arm/mach-bcmring/Kconfig"
806
807# Definitions to make life easier
808config ARCH_ACORN
809 bool
810
811config PLAT_IOP
812 bool
813 select GENERIC_CLOCKEVENTS
814
815config PLAT_ORION
816 bool
817
818config PLAT_PXA
819 bool
820
821source arch/arm/mm/Kconfig
822
823config IWMMXT
824 bool "Enable iWMMXt support"
825 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
826 default y if PXA27x || PXA3xx || ARCH_MMP
827 help
828 Enable support for iWMMXt context switching at run time if
829 running on a CPU that supports it.
830
831# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
832config XSCALE_PMU
833 bool
834 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
835 default y
836
837if !MMU
838source "arch/arm/Kconfig-nommu"
839endif
840
841config ARM_ERRATA_411920
842 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
843 depends on CPU_V6 && !SMP
844 help
845 Invalidation of the Instruction Cache operation can
846 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
847 It does not affect the MPCore. This option enables the ARM Ltd.
848 recommended workaround.
849
850config ARM_ERRATA_430973
851 bool "ARM errata: Stale prediction on replaced interworking branch"
852 depends on CPU_V7
853 help
854 This option enables the workaround for the 430973 Cortex-A8
855 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
856 interworking branch is replaced with another code sequence at the
857 same virtual address, whether due to self-modifying code or virtual
858 to physical address re-mapping, Cortex-A8 does not recover from the
859 stale interworking branch prediction. This results in Cortex-A8
860 executing the new code sequence in the incorrect ARM or Thumb state.
861 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
862 and also flushes the branch target cache at every context switch.
863 Note that setting specific bits in the ACTLR register may not be
864 available in non-secure mode.
865
866config ARM_ERRATA_458693
867 bool "ARM errata: Processor deadlock when a false hazard is created"
868 depends on CPU_V7
869 help
870 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
871 erratum. For very specific sequences of memory operations, it is
872 possible for a hazard condition intended for a cache line to instead
873 be incorrectly associated with a different cache line. This false
874 hazard might then cause a processor deadlock. The workaround enables
875 the L1 caching of the NEON accesses and disables the PLD instruction
876 in the ACTLR register. Note that setting specific bits in the ACTLR
877 register may not be available in non-secure mode.
878
879config ARM_ERRATA_460075
880 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
881 depends on CPU_V7
882 help
883 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
884 erratum. Any asynchronous access to the L2 cache may encounter a
885 situation in which recent store transactions to the L2 cache are lost
886 and overwritten with stale memory contents from external memory. The
887 workaround disables the write-allocate mode for the L2 cache via the
888 ACTLR register. Note that setting specific bits in the ACTLR register
889 may not be available in non-secure mode.
890
891endmenu
892
893source "arch/arm/common/Kconfig"
894
895config FORCE_MAX_ZONEORDER
896 int
897 depends on SA1111
898 default "9"
899
900menu "Bus support"
901
902config ARM_AMBA
903 bool
904
905config ISA
906 bool
907 help
908 Find out whether you have ISA slots on your motherboard. ISA is the
909 name of a bus system, i.e. the way the CPU talks to the other stuff
910 inside your box. Other bus systems are PCI, EISA, MicroChannel
911 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
912 newer boards don't support it. If you have ISA, say Y, otherwise N.
913
914# Select ISA DMA controller support
915config ISA_DMA
916 bool
917 select ISA_DMA_API
918
919# Select ISA DMA interface
920config ISA_DMA_API
921 bool
922
923config PCI
924 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
925 help
926 Find out whether you have a PCI motherboard. PCI is the name of a
927 bus system, i.e. the way the CPU talks to the other stuff inside
928 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
929 VESA. If you have PCI, say Y, otherwise N.
930
931config PCI_SYSCALL
932 def_bool PCI
933
934# Select the host bridge type
935config PCI_HOST_VIA82C505
936 bool
937 depends on PCI && ARCH_SHARK
938 default y
939
940config PCI_HOST_ITE8152
941 bool
942 depends on PCI && MACH_ARMCORE
943 default y
944 select DMABOUNCE
945
946source "drivers/pci/Kconfig"
947
948source "drivers/pcmcia/Kconfig"
949
950endmenu
951
952menu "Kernel Features"
953
954source "kernel/time/Kconfig"
955
956config SMP
957 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
958 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
959 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
960 depends on GENERIC_CLOCKEVENTS
961 select USE_GENERIC_SMP_HELPERS
962 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4)
963 help
964 This enables support for systems with more than one CPU. If you have
965 a system with only one CPU, like most personal computers, say N. If
966 you have a system with more than one CPU, say Y.
967
968 If you say N here, the kernel will run on single and multiprocessor
969 machines, but will use only one CPU of a multiprocessor machine. If
970 you say Y here, the kernel will run on many, but not all, single
971 processor machines. On a single processor machine, the kernel will
972 run faster if you say N here.
973
974 See also <file:Documentation/i386/IO-APIC.txt>,
975 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
976 <http://www.linuxdoc.org/docs.html#howto>.
977
978 If you don't know what to do here, say N.
979
980config HAVE_ARM_SCU
981 bool
982 depends on SMP
983 help
984 This option enables support for the ARM system coherency unit
985
986config HAVE_ARM_TWD
987 bool
988 depends on SMP
989 help
990 This options enables support for the ARM timer and watchdog unit
991
992choice
993 prompt "Memory split"
994 default VMSPLIT_3G
995 help
996 Select the desired split between kernel and user memory.
997
998 If you are not absolutely sure what you are doing, leave this
999 option alone!
1000
1001 config VMSPLIT_3G
1002 bool "3G/1G user/kernel split"
1003 config VMSPLIT_2G
1004 bool "2G/2G user/kernel split"
1005 config VMSPLIT_1G
1006 bool "1G/3G user/kernel split"
1007endchoice
1008
1009config PAGE_OFFSET
1010 hex
1011 default 0x40000000 if VMSPLIT_1G
1012 default 0x80000000 if VMSPLIT_2G
1013 default 0xC0000000
1014
1015config NR_CPUS
1016 int "Maximum number of CPUs (2-32)"
1017 range 2 32
1018 depends on SMP
1019 default "4"
1020
1021config HOTPLUG_CPU
1022 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1023 depends on SMP && HOTPLUG && EXPERIMENTAL
1024 help
1025 Say Y here to experiment with turning CPUs off and on. CPUs
1026 can be controlled through /sys/devices/system/cpu.
1027
1028config LOCAL_TIMERS
1029 bool "Use local timer interrupts"
1030 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1031 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
1032 default y
1033 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4)
1034 help
1035 Enable support for local timers on SMP platforms, rather then the
1036 legacy IPI broadcast method. Local timers allows the system
1037 accounting to be spread across the timer interval, preventing a
1038 "thundering herd" at every timer tick.
1039
1040source kernel/Kconfig.preempt
1041
1042config HZ
1043 int
1044 default 128 if ARCH_L7200
1045 default 200 if ARCH_EBSA110 || ARCH_S3C2410
1046 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1047 default AT91_TIMER_HZ if ARCH_AT91
1048 default 100
1049
1050config THUMB2_KERNEL
1051 bool "Compile the kernel in Thumb-2 mode"
1052 depends on CPU_V7 && EXPERIMENTAL
1053 select AEABI
1054 select ARM_ASM_UNIFIED
1055 help
1056 By enabling this option, the kernel will be compiled in
1057 Thumb-2 mode. A compiler/assembler that understand the unified
1058 ARM-Thumb syntax is needed.
1059
1060 If unsure, say N.
1061
1062config ARM_ASM_UNIFIED
1063 bool
1064
1065config AEABI
1066 bool "Use the ARM EABI to compile the kernel"
1067 help
1068 This option allows for the kernel to be compiled using the latest
1069 ARM ABI (aka EABI). This is only useful if you are using a user
1070 space environment that is also compiled with EABI.
1071
1072 Since there are major incompatibilities between the legacy ABI and
1073 EABI, especially with regard to structure member alignment, this
1074 option also changes the kernel syscall calling convention to
1075 disambiguate both ABIs and allow for backward compatibility support
1076 (selected with CONFIG_OABI_COMPAT).
1077
1078 To use this you need GCC version 4.0.0 or later.
1079
1080config OABI_COMPAT
1081 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1082 depends on AEABI && EXPERIMENTAL
1083 default y
1084 help
1085 This option preserves the old syscall interface along with the
1086 new (ARM EABI) one. It also provides a compatibility layer to
1087 intercept syscalls that have structure arguments which layout
1088 in memory differs between the legacy ABI and the new ARM EABI
1089 (only for non "thumb" binaries). This option adds a tiny
1090 overhead to all syscalls and produces a slightly larger kernel.
1091 If you know you'll be using only pure EABI user space then you
1092 can say N here. If this option is not selected and you attempt
1093 to execute a legacy ABI binary then the result will be
1094 UNPREDICTABLE (in fact it can be predicted that it won't work
1095 at all). If in doubt say Y.
1096
1097config ARCH_HAS_HOLES_MEMORYMODEL
1098 bool
1099
1100# Discontigmem is deprecated
1101config ARCH_DISCONTIGMEM_ENABLE
1102 bool
1103
1104config ARCH_SPARSEMEM_ENABLE
1105 bool
1106
1107config ARCH_SPARSEMEM_DEFAULT
1108 def_bool ARCH_SPARSEMEM_ENABLE
1109
1110config ARCH_SELECT_MEMORY_MODEL
1111 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1112
1113config NODES_SHIFT
1114 int
1115 default "4" if ARCH_LH7A40X
1116 default "2"
1117 depends on NEED_MULTIPLE_NODES
1118
1119config HIGHMEM
1120 bool "High Memory Support (EXPERIMENTAL)"
1121 depends on MMU && EXPERIMENTAL
1122 help
1123 The address space of ARM processors is only 4 Gigabytes large
1124 and it has to accommodate user address space, kernel address
1125 space as well as some memory mapped IO. That means that, if you
1126 have a large amount of physical memory and/or IO, not all of the
1127 memory can be "permanently mapped" by the kernel. The physical
1128 memory that is not permanently mapped is called "high memory".
1129
1130 Depending on the selected kernel/user memory split, minimum
1131 vmalloc space and actual amount of RAM, you may not need this
1132 option which should result in a slightly faster kernel.
1133
1134 If unsure, say n.
1135
1136config HIGHPTE
1137 bool "Allocate 2nd-level pagetables from highmem"
1138 depends on HIGHMEM
1139 depends on !OUTER_CACHE
1140
1141source "mm/Kconfig"
1142
1143config LEDS
1144 bool "Timer and CPU usage LEDs"
1145 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1146 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1147 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1148 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1149 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1150 ARCH_AT91 || ARCH_DAVINCI || \
1151 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1152 help
1153 If you say Y here, the LEDs on your machine will be used
1154 to provide useful information about your current system status.
1155
1156 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1157 be able to select which LEDs are active using the options below. If
1158 you are compiling a kernel for the EBSA-110 or the LART however, the
1159 red LED will simply flash regularly to indicate that the system is
1160 still functional. It is safe to say Y here if you have a CATS
1161 system, but the driver will do nothing.
1162
1163config LEDS_TIMER
1164 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1165 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1166 || MACH_OMAP_PERSEUS2
1167 depends on LEDS
1168 depends on !GENERIC_CLOCKEVENTS
1169 default y if ARCH_EBSA110
1170 help
1171 If you say Y here, one of the system LEDs (the green one on the
1172 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1173 will flash regularly to indicate that the system is still
1174 operational. This is mainly useful to kernel hackers who are
1175 debugging unstable kernels.
1176
1177 The LART uses the same LED for both Timer LED and CPU usage LED
1178 functions. You may choose to use both, but the Timer LED function
1179 will overrule the CPU usage LED.
1180
1181config LEDS_CPU
1182 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1183 !ARCH_OMAP) \
1184 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1185 || MACH_OMAP_PERSEUS2
1186 depends on LEDS
1187 help
1188 If you say Y here, the red LED will be used to give a good real
1189 time indication of CPU usage, by lighting whenever the idle task
1190 is not currently executing.
1191
1192 The LART uses the same LED for both Timer LED and CPU usage LED
1193 functions. You may choose to use both, but the Timer LED function
1194 will overrule the CPU usage LED.
1195
1196config ALIGNMENT_TRAP
1197 bool
1198 depends on CPU_CP15_MMU
1199 default y if !ARCH_EBSA110
1200 help
1201 ARM processors cannot fetch/store information which is not
1202 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1203 address divisible by 4. On 32-bit ARM processors, these non-aligned
1204 fetch/store instructions will be emulated in software if you say
1205 here, which has a severe performance impact. This is necessary for
1206 correct operation of some network protocols. With an IP-only
1207 configuration it is safe to say N, otherwise say Y.
1208
1209config UACCESS_WITH_MEMCPY
1210 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1211 depends on MMU && EXPERIMENTAL
1212 default y if CPU_FEROCEON
1213 help
1214 Implement faster copy_to_user and clear_user methods for CPU
1215 cores where a 8-word STM instruction give significantly higher
1216 memory write throughput than a sequence of individual 32bit stores.
1217
1218 A possible side effect is a slight increase in scheduling latency
1219 between threads sharing the same address space if they invoke
1220 such copy operations with large buffers.
1221
1222 However, if the CPU data cache is using a write-allocate mode,
1223 this option is unlikely to provide any performance gain.
1224
1225endmenu
1226
1227menu "Boot options"
1228
1229# Compressed boot loader in ROM. Yes, we really want to ask about
1230# TEXT and BSS so we preserve their values in the config files.
1231config ZBOOT_ROM_TEXT
1232 hex "Compressed ROM boot loader base address"
1233 default "0"
1234 help
1235 The physical address at which the ROM-able zImage is to be
1236 placed in the target. Platforms which normally make use of
1237 ROM-able zImage formats normally set this to a suitable
1238 value in their defconfig file.
1239
1240 If ZBOOT_ROM is not enabled, this has no effect.
1241
1242config ZBOOT_ROM_BSS
1243 hex "Compressed ROM boot loader BSS address"
1244 default "0"
1245 help
1246 The base address of an area of read/write memory in the target
1247 for the ROM-able zImage which must be available while the
1248 decompressor is running. It must be large enough to hold the
1249 entire decompressed kernel plus an additional 128 KiB.
1250 Platforms which normally make use of ROM-able zImage formats
1251 normally set this to a suitable value in their defconfig file.
1252
1253 If ZBOOT_ROM is not enabled, this has no effect.
1254
1255config ZBOOT_ROM
1256 bool "Compressed boot loader in ROM/flash"
1257 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1258 help
1259 Say Y here if you intend to execute your compressed kernel image
1260 (zImage) directly from ROM or flash. If unsure, say N.
1261
1262config CMDLINE
1263 string "Default kernel command string"
1264 default ""
1265 help
1266 On some architectures (EBSA110 and CATS), there is currently no way
1267 for the boot loader to pass arguments to the kernel. For these
1268 architectures, you should supply some command-line options at build
1269 time by entering them here. As a minimum, you should specify the
1270 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1271
1272config XIP_KERNEL
1273 bool "Kernel Execute-In-Place from ROM"
1274 depends on !ZBOOT_ROM
1275 help
1276 Execute-In-Place allows the kernel to run from non-volatile storage
1277 directly addressable by the CPU, such as NOR flash. This saves RAM
1278 space since the text section of the kernel is not loaded from flash
1279 to RAM. Read-write sections, such as the data section and stack,
1280 are still copied to RAM. The XIP kernel is not compressed since
1281 it has to run directly from flash, so it will take more space to
1282 store it. The flash address used to link the kernel object files,
1283 and for storing it, is configuration dependent. Therefore, if you
1284 say Y here, you must know the proper physical address where to
1285 store the kernel image depending on your own flash memory usage.
1286
1287 Also note that the make target becomes "make xipImage" rather than
1288 "make zImage" or "make Image". The final kernel binary to put in
1289 ROM memory will be arch/arm/boot/xipImage.
1290
1291 If unsure, say N.
1292
1293config XIP_PHYS_ADDR
1294 hex "XIP Kernel Physical Location"
1295 depends on XIP_KERNEL
1296 default "0x00080000"
1297 help
1298 This is the physical address in your flash memory the kernel will
1299 be linked for and stored to. This address is dependent on your
1300 own flash usage.
1301
1302config KEXEC
1303 bool "Kexec system call (EXPERIMENTAL)"
1304 depends on EXPERIMENTAL
1305 help
1306 kexec is a system call that implements the ability to shutdown your
1307 current kernel, and to start another kernel. It is like a reboot
1308 but it is independent of the system firmware. And like a reboot
1309 you can start any kernel with it, not just Linux.
1310
1311 It is an ongoing process to be certain the hardware in a machine
1312 is properly shutdown, so do not be surprised if this code does not
1313 initially work for you. It may help to enable device hotplugging
1314 support.
1315
1316config ATAGS_PROC
1317 bool "Export atags in procfs"
1318 depends on KEXEC
1319 default y
1320 help
1321 Should the atags used to boot the kernel be exported in an "atags"
1322 file in procfs. Useful with kexec.
1323
1324endmenu
1325
1326menu "CPU Power Management"
1327
1328if ARCH_HAS_CPUFREQ
1329
1330source "drivers/cpufreq/Kconfig"
1331
1332config CPU_FREQ_SA1100
1333 bool
1334 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1335 default y
1336
1337config CPU_FREQ_SA1110
1338 bool
1339 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1340 default y
1341
1342config CPU_FREQ_INTEGRATOR
1343 tristate "CPUfreq driver for ARM Integrator CPUs"
1344 depends on ARCH_INTEGRATOR && CPU_FREQ
1345 default y
1346 help
1347 This enables the CPUfreq driver for ARM Integrator CPUs.
1348
1349 For details, take a look at <file:Documentation/cpu-freq>.
1350
1351 If in doubt, say Y.
1352
1353config CPU_FREQ_PXA
1354 bool
1355 depends on CPU_FREQ && ARCH_PXA && PXA25x
1356 default y
1357 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1358
1359config CPU_FREQ_S3C64XX
1360 bool "CPUfreq support for Samsung S3C64XX CPUs"
1361 depends on CPU_FREQ && CPU_S3C6410
1362
1363config CPU_FREQ_S3C
1364 bool
1365 help
1366 Internal configuration node for common cpufreq on Samsung SoC
1367
1368config CPU_FREQ_S3C24XX
1369 bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1370 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1371 select CPU_FREQ_S3C
1372 help
1373 This enables the CPUfreq driver for the Samsung S3C24XX family
1374 of CPUs.
1375
1376 For details, take a look at <file:Documentation/cpu-freq>.
1377
1378 If in doubt, say N.
1379
1380config CPU_FREQ_S3C24XX_PLL
1381 bool "Support CPUfreq changing of PLL frequency"
1382 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1383 help
1384 Compile in support for changing the PLL frequency from the
1385 S3C24XX series CPUfreq driver. The PLL takes time to settle
1386 after a frequency change, so by default it is not enabled.
1387
1388 This also means that the PLL tables for the selected CPU(s) will
1389 be built which may increase the size of the kernel image.
1390
1391config CPU_FREQ_S3C24XX_DEBUG
1392 bool "Debug CPUfreq Samsung driver core"
1393 depends on CPU_FREQ_S3C24XX
1394 help
1395 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1396
1397config CPU_FREQ_S3C24XX_IODEBUG
1398 bool "Debug CPUfreq Samsung driver IO timing"
1399 depends on CPU_FREQ_S3C24XX
1400 help
1401 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1402
1403config CPU_FREQ_S3C24XX_DEBUGFS
1404 bool "Export debugfs for CPUFreq"
1405 depends on CPU_FREQ_S3C24XX && DEBUG_FS
1406 help
1407 Export status information via debugfs.
1408
1409endif
1410
1411source "drivers/cpuidle/Kconfig"
1412
1413endmenu
1414
1415menu "Floating point emulation"
1416
1417comment "At least one emulation must be selected"
1418
1419config FPE_NWFPE
1420 bool "NWFPE math emulation"
1421 depends on !AEABI || OABI_COMPAT
1422 ---help---
1423 Say Y to include the NWFPE floating point emulator in the kernel.
1424 This is necessary to run most binaries. Linux does not currently
1425 support floating point hardware so you need to say Y here even if
1426 your machine has an FPA or floating point co-processor podule.
1427
1428 You may say N here if you are going to load the Acorn FPEmulator
1429 early in the bootup.
1430
1431config FPE_NWFPE_XP
1432 bool "Support extended precision"
1433 depends on FPE_NWFPE
1434 help
1435 Say Y to include 80-bit support in the kernel floating-point
1436 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1437 Note that gcc does not generate 80-bit operations by default,
1438 so in most cases this option only enlarges the size of the
1439 floating point emulator without any good reason.
1440
1441 You almost surely want to say N here.
1442
1443config FPE_FASTFPE
1444 bool "FastFPE math emulation (EXPERIMENTAL)"
1445 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1446 ---help---
1447 Say Y here to include the FAST floating point emulator in the kernel.
1448 This is an experimental much faster emulator which now also has full
1449 precision for the mantissa. It does not support any exceptions.
1450 It is very simple, and approximately 3-6 times faster than NWFPE.
1451
1452 It should be sufficient for most programs. It may be not suitable
1453 for scientific calculations, but you have to check this for yourself.
1454 If you do not feel you need a faster FP emulation you should better
1455 choose NWFPE.
1456
1457config VFP
1458 bool "VFP-format floating point maths"
1459 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1460 help
1461 Say Y to include VFP support code in the kernel. This is needed
1462 if your hardware includes a VFP unit.
1463
1464 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1465 release notes and additional status information.
1466
1467 Say N if your target does not have VFP hardware.
1468
1469config VFPv3
1470 bool
1471 depends on VFP
1472 default y if CPU_V7
1473
1474config NEON
1475 bool "Advanced SIMD (NEON) Extension support"
1476 depends on VFPv3 && CPU_V7
1477 help
1478 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1479 Extension.
1480
1481endmenu
1482
1483menu "Userspace binary formats"
1484
1485source "fs/Kconfig.binfmt"
1486
1487config ARTHUR
1488 tristate "RISC OS personality"
1489 depends on !AEABI
1490 help
1491 Say Y here to include the kernel code necessary if you want to run
1492 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1493 experimental; if this sounds frightening, say N and sleep in peace.
1494 You can also say M here to compile this support as a module (which
1495 will be called arthur).
1496
1497endmenu
1498
1499menu "Power management options"
1500
1501source "kernel/power/Kconfig"
1502
1503config ARCH_SUSPEND_POSSIBLE
1504 def_bool y
1505
1506endmenu
1507
1508source "net/Kconfig"
1509
1510source "drivers/Kconfig"
1511
1512source "fs/Kconfig"
1513
1514source "arch/arm/Kconfig.debug"
1515
1516source "security/Kconfig"
1517
1518source "crypto/Kconfig"
1519
1520source "lib/Kconfig"
Linux 6.x block layer and io_uring tree(s)