tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 GENERIC_ATOMIC64 if (!CPU_32v6K)
16 select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
17 select HAVE_ARCH_KGDB
18 select HAVE_KPROBES if (!XIP_KERNEL)
19 select HAVE_KRETPROBES if (HAVE_KPROBES)
20 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
21 select HAVE_GENERIC_DMA_COHERENT
22 select HAVE_KERNEL_GZIP
23 select HAVE_KERNEL_LZO
24 select HAVE_KERNEL_LZMA
25 select HAVE_PERF_EVENTS
26 select PERF_USE_VMALLOC
27 help
28 The ARM series is a line of low-power-consumption RISC chip designs
29 licensed by ARM Ltd and targeted at embedded applications and
30 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
31 manufactured, but legacy ARM-based PC hardware remains popular in
32 Europe. There is an ARM Linux project with a web page at
33 <http://www.arm.linux.org.uk/>.
34
35config HAVE_PWM
36 bool
37
38config SYS_SUPPORTS_APM_EMULATION
39 bool
40
41config GENERIC_GPIO
42 bool
43
44config GENERIC_TIME
45 bool
46 default y
47
48config ARCH_USES_GETTIMEOFFSET
49 bool
50 default n
51
52config GENERIC_CLOCKEVENTS
53 bool
54
55config GENERIC_CLOCKEVENTS_BROADCAST
56 bool
57 depends on GENERIC_CLOCKEVENTS
58 default y if SMP && !LOCAL_TIMERS
59
60config HAVE_TCM
61 bool
62 select GENERIC_ALLOCATOR
63
64config HAVE_PROC_CPU
65 bool
66
67config NO_IOPORT
68 bool
69
70config EISA
71 bool
72 ---help---
73 The Extended Industry Standard Architecture (EISA) bus was
74 developed as an open alternative to the IBM MicroChannel bus.
75
76 The EISA bus provided some of the features of the IBM MicroChannel
77 bus while maintaining backward compatibility with cards made for
78 the older ISA bus. The EISA bus saw limited use between 1988 and
79 1995 when it was made obsolete by the PCI bus.
80
81 Say Y here if you are building a kernel for an EISA-based machine.
82
83 Otherwise, say N.
84
85config SBUS
86 bool
87
88config MCA
89 bool
90 help
91 MicroChannel Architecture is found in some IBM PS/2 machines and
92 laptops. It is a bus system similar to PCI or ISA. See
93 <file:Documentation/mca.txt> (and especially the web page given
94 there) before attempting to build an MCA bus kernel.
95
96config GENERIC_HARDIRQS
97 bool
98 default y
99
100config STACKTRACE_SUPPORT
101 bool
102 default y
103
104config HAVE_LATENCYTOP_SUPPORT
105 bool
106 depends on !SMP
107 default y
108
109config LOCKDEP_SUPPORT
110 bool
111 default y
112
113config TRACE_IRQFLAGS_SUPPORT
114 bool
115 default y
116
117config HARDIRQS_SW_RESEND
118 bool
119 default y
120
121config GENERIC_IRQ_PROBE
122 bool
123 default y
124
125config GENERIC_LOCKBREAK
126 bool
127 default y
128 depends on SMP && PREEMPT
129
130config RWSEM_GENERIC_SPINLOCK
131 bool
132 default y
133
134config RWSEM_XCHGADD_ALGORITHM
135 bool
136
137config ARCH_HAS_ILOG2_U32
138 bool
139
140config ARCH_HAS_ILOG2_U64
141 bool
142
143config ARCH_HAS_CPUFREQ
144 bool
145 help
146 Internal node to signify that the ARCH has CPUFREQ support
147 and that the relevant menu configurations are displayed for
148 it.
149
150config GENERIC_HWEIGHT
151 bool
152 default y
153
154config GENERIC_CALIBRATE_DELAY
155 bool
156 default y
157
158config ARCH_MAY_HAVE_PC_FDC
159 bool
160
161config ZONE_DMA
162 bool
163
164config NEED_DMA_MAP_STATE
165 def_bool y
166
167config GENERIC_ISA_DMA
168 bool
169
170config FIQ
171 bool
172
173config ARCH_MTD_XIP
174 bool
175
176config GENERIC_HARDIRQS_NO__DO_IRQ
177 def_bool y
178
179config ARM_L1_CACHE_SHIFT_6
180 bool
181 help
182 Setting ARM L1 cache line size to 64 Bytes.
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
205#
206# The "ARM system type" choice list is ordered alphabetically by option
207# text. Please add new entries in the option alphabetic order.
208#
209choice
210 prompt "ARM system type"
211 default ARCH_VERSATILE
212
213config ARCH_AAEC2000
214 bool "Agilent AAEC-2000 based"
215 select CPU_ARM920T
216 select ARM_AMBA
217 select HAVE_CLK
218 select ARCH_USES_GETTIMEOFFSET
219 help
220 This enables support for systems based on the Agilent AAEC-2000
221
222config ARCH_INTEGRATOR
223 bool "ARM Ltd. Integrator family"
224 select ARM_AMBA
225 select ARCH_HAS_CPUFREQ
226 select COMMON_CLKDEV
227 select ICST
228 select GENERIC_CLOCKEVENTS
229 select PLAT_VERSATILE
230 help
231 Support for ARM's Integrator platform.
232
233config ARCH_REALVIEW
234 bool "ARM Ltd. RealView family"
235 select ARM_AMBA
236 select COMMON_CLKDEV
237 select ICST
238 select GENERIC_CLOCKEVENTS
239 select ARCH_WANT_OPTIONAL_GPIOLIB
240 select PLAT_VERSATILE
241 select ARM_TIMER_SP804
242 select GPIO_PL061 if GPIOLIB
243 help
244 This enables support for ARM Ltd RealView boards.
245
246config ARCH_VERSATILE
247 bool "ARM Ltd. Versatile family"
248 select ARM_AMBA
249 select ARM_VIC
250 select COMMON_CLKDEV
251 select ICST
252 select GENERIC_CLOCKEVENTS
253 select ARCH_WANT_OPTIONAL_GPIOLIB
254 select PLAT_VERSATILE
255 select ARM_TIMER_SP804
256 help
257 This enables support for ARM Ltd Versatile board.
258
259config ARCH_VEXPRESS
260 bool "ARM Ltd. Versatile Express family"
261 select ARCH_WANT_OPTIONAL_GPIOLIB
262 select ARM_AMBA
263 select ARM_TIMER_SP804
264 select COMMON_CLKDEV
265 select GENERIC_CLOCKEVENTS
266 select HAVE_CLK
267 select ICST
268 select PLAT_VERSATILE
269 help
270 This enables support for the ARM Ltd Versatile Express boards.
271
272config ARCH_AT91
273 bool "Atmel AT91"
274 select ARCH_REQUIRE_GPIOLIB
275 select HAVE_CLK
276 select ARCH_USES_GETTIMEOFFSET
277 help
278 This enables support for systems based on the Atmel AT91RM9200,
279 AT91SAM9 and AT91CAP9 processors.
280
281config ARCH_BCMRING
282 bool "Broadcom BCMRING"
283 depends on MMU
284 select CPU_V6
285 select ARM_AMBA
286 select COMMON_CLKDEV
287 select GENERIC_CLOCKEVENTS
288 select ARCH_WANT_OPTIONAL_GPIOLIB
289 help
290 Support for Broadcom's BCMRing platform.
291
292config ARCH_CLPS711X
293 bool "Cirrus Logic CLPS711x/EP721x-based"
294 select CPU_ARM720T
295 select ARCH_USES_GETTIMEOFFSET
296 help
297 Support for Cirrus Logic 711x/721x based boards.
298
299config ARCH_CNS3XXX
300 bool "Cavium Networks CNS3XXX family"
301 select CPU_V6
302 select GENERIC_CLOCKEVENTS
303 select ARM_GIC
304 help
305 Support for Cavium Networks CNS3XXX platform.
306
307config ARCH_GEMINI
308 bool "Cortina Systems Gemini"
309 select CPU_FA526
310 select ARCH_REQUIRE_GPIOLIB
311 select ARCH_USES_GETTIMEOFFSET
312 help
313 Support for the Cortina Systems Gemini family SoCs
314
315config ARCH_EBSA110
316 bool "EBSA-110"
317 select CPU_SA110
318 select ISA
319 select NO_IOPORT
320 select ARCH_USES_GETTIMEOFFSET
321 help
322 This is an evaluation board for the StrongARM processor available
323 from Digital. It has limited hardware on-board, including an
324 Ethernet interface, two PCMCIA sockets, two serial ports and a
325 parallel port.
326
327config ARCH_EP93XX
328 bool "EP93xx-based"
329 select CPU_ARM920T
330 select ARM_AMBA
331 select ARM_VIC
332 select COMMON_CLKDEV
333 select ARCH_REQUIRE_GPIOLIB
334 select ARCH_HAS_HOLES_MEMORYMODEL
335 select ARCH_USES_GETTIMEOFFSET
336 help
337 This enables support for the Cirrus EP93xx series of CPUs.
338
339config ARCH_FOOTBRIDGE
340 bool "FootBridge"
341 select CPU_SA110
342 select FOOTBRIDGE
343 select ARCH_USES_GETTIMEOFFSET
344 help
345 Support for systems based on the DC21285 companion chip
346 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
347
348config ARCH_MXC
349 bool "Freescale MXC/iMX-based"
350 select GENERIC_CLOCKEVENTS
351 select ARCH_REQUIRE_GPIOLIB
352 select COMMON_CLKDEV
353 help
354 Support for Freescale MXC/iMX-based family of processors
355
356config ARCH_STMP3XXX
357 bool "Freescale STMP3xxx"
358 select CPU_ARM926T
359 select COMMON_CLKDEV
360 select ARCH_REQUIRE_GPIOLIB
361 select GENERIC_CLOCKEVENTS
362 select USB_ARCH_HAS_EHCI
363 help
364 Support for systems based on the Freescale 3xxx CPUs.
365
366config ARCH_NETX
367 bool "Hilscher NetX based"
368 select CPU_ARM926T
369 select ARM_VIC
370 select GENERIC_CLOCKEVENTS
371 help
372 This enables support for systems based on the Hilscher NetX Soc
373
374config ARCH_H720X
375 bool "Hynix HMS720x-based"
376 select CPU_ARM720T
377 select ISA_DMA_API
378 select ARCH_USES_GETTIMEOFFSET
379 help
380 This enables support for systems based on the Hynix HMS720x
381
382config ARCH_IOP13XX
383 bool "IOP13xx-based"
384 depends on MMU
385 select CPU_XSC3
386 select PLAT_IOP
387 select PCI
388 select ARCH_SUPPORTS_MSI
389 select VMSPLIT_1G
390 help
391 Support for Intel's IOP13XX (XScale) family of processors.
392
393config ARCH_IOP32X
394 bool "IOP32x-based"
395 depends on MMU
396 select CPU_XSCALE
397 select PLAT_IOP
398 select PCI
399 select ARCH_REQUIRE_GPIOLIB
400 help
401 Support for Intel's 80219 and IOP32X (XScale) family of
402 processors.
403
404config ARCH_IOP33X
405 bool "IOP33x-based"
406 depends on MMU
407 select CPU_XSCALE
408 select PLAT_IOP
409 select PCI
410 select ARCH_REQUIRE_GPIOLIB
411 help
412 Support for Intel's IOP33X (XScale) family of processors.
413
414config ARCH_IXP23XX
415 bool "IXP23XX-based"
416 depends on MMU
417 select CPU_XSC3
418 select PCI
419 select ARCH_USES_GETTIMEOFFSET
420 help
421 Support for Intel's IXP23xx (XScale) family of processors.
422
423config ARCH_IXP2000
424 bool "IXP2400/2800-based"
425 depends on MMU
426 select CPU_XSCALE
427 select PCI
428 select ARCH_USES_GETTIMEOFFSET
429 help
430 Support for Intel's IXP2400/2800 (XScale) family of processors.
431
432config ARCH_IXP4XX
433 bool "IXP4xx-based"
434 depends on MMU
435 select CPU_XSCALE
436 select GENERIC_GPIO
437 select GENERIC_CLOCKEVENTS
438 select DMABOUNCE if PCI
439 help
440 Support for Intel's IXP4XX (XScale) family of processors.
441
442config ARCH_L7200
443 bool "LinkUp-L7200"
444 select CPU_ARM720T
445 select FIQ
446 select ARCH_USES_GETTIMEOFFSET
447 help
448 Say Y here if you intend to run this kernel on a LinkUp Systems
449 L7200 Software Development Board which uses an ARM720T processor.
450 Information on this board can be obtained at:
451
452 <http://www.linkupsys.com/>
453
454 If you have any questions or comments about the Linux kernel port
455 to this board, send e-mail to <sjhill@cotw.com>.
456
457config ARCH_DOVE
458 bool "Marvell Dove"
459 select PCI
460 select ARCH_REQUIRE_GPIOLIB
461 select GENERIC_CLOCKEVENTS
462 select PLAT_ORION
463 help
464 Support for the Marvell Dove SoC 88AP510
465
466config ARCH_KIRKWOOD
467 bool "Marvell Kirkwood"
468 select CPU_FEROCEON
469 select PCI
470 select ARCH_REQUIRE_GPIOLIB
471 select GENERIC_CLOCKEVENTS
472 select PLAT_ORION
473 help
474 Support for the following Marvell Kirkwood series SoCs:
475 88F6180, 88F6192 and 88F6281.
476
477config ARCH_LOKI
478 bool "Marvell Loki (88RC8480)"
479 select CPU_FEROCEON
480 select GENERIC_CLOCKEVENTS
481 select PLAT_ORION
482 help
483 Support for the Marvell Loki (88RC8480) SoC.
484
485config ARCH_MV78XX0
486 bool "Marvell MV78xx0"
487 select CPU_FEROCEON
488 select PCI
489 select ARCH_REQUIRE_GPIOLIB
490 select GENERIC_CLOCKEVENTS
491 select PLAT_ORION
492 help
493 Support for the following Marvell MV78xx0 series SoCs:
494 MV781x0, MV782x0.
495
496config ARCH_ORION5X
497 bool "Marvell Orion"
498 depends on MMU
499 select CPU_FEROCEON
500 select PCI
501 select ARCH_REQUIRE_GPIOLIB
502 select GENERIC_CLOCKEVENTS
503 select PLAT_ORION
504 help
505 Support for the following Marvell Orion 5x series SoCs:
506 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
507 Orion-2 (5281), Orion-1-90 (6183).
508
509config ARCH_MMP
510 bool "Marvell PXA168/910/MMP2"
511 depends on MMU
512 select ARCH_REQUIRE_GPIOLIB
513 select COMMON_CLKDEV
514 select GENERIC_CLOCKEVENTS
515 select TICK_ONESHOT
516 select PLAT_PXA
517 help
518 Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
519
520config ARCH_KS8695
521 bool "Micrel/Kendin KS8695"
522 select CPU_ARM922T
523 select ARCH_REQUIRE_GPIOLIB
524 select ARCH_USES_GETTIMEOFFSET
525 help
526 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
527 System-on-Chip devices.
528
529config ARCH_NS9XXX
530 bool "NetSilicon NS9xxx"
531 select CPU_ARM926T
532 select GENERIC_GPIO
533 select GENERIC_CLOCKEVENTS
534 select HAVE_CLK
535 help
536 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
537 System.
538
539 <http://www.digi.com/products/microprocessors/index.jsp>
540
541config ARCH_W90X900
542 bool "Nuvoton W90X900 CPU"
543 select CPU_ARM926T
544 select ARCH_REQUIRE_GPIOLIB
545 select COMMON_CLKDEV
546 select GENERIC_CLOCKEVENTS
547 help
548 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
549 At present, the w90x900 has been renamed nuc900, regarding
550 the ARM series product line, you can login the following
551 link address to know more.
552
553 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
554 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
555
556config ARCH_NUC93X
557 bool "Nuvoton NUC93X CPU"
558 select CPU_ARM926T
559 select COMMON_CLKDEV
560 help
561 Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
562 low-power and high performance MPEG-4/JPEG multimedia controller chip.
563
564config ARCH_PNX4008
565 bool "Philips Nexperia PNX4008 Mobile"
566 select CPU_ARM926T
567 select COMMON_CLKDEV
568 select ARCH_USES_GETTIMEOFFSET
569 help
570 This enables support for Philips PNX4008 mobile platform.
571
572config ARCH_PXA
573 bool "PXA2xx/PXA3xx-based"
574 depends on MMU
575 select ARCH_MTD_XIP
576 select ARCH_HAS_CPUFREQ
577 select COMMON_CLKDEV
578 select ARCH_REQUIRE_GPIOLIB
579 select GENERIC_CLOCKEVENTS
580 select TICK_ONESHOT
581 select PLAT_PXA
582 help
583 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
584
585config ARCH_MSM
586 bool "Qualcomm MSM"
587 select HAVE_CLK
588 select GENERIC_CLOCKEVENTS
589 help
590 Support for Qualcomm MSM/QSD based systems. This runs on the
591 apps processor of the MSM/QSD and depends on a shared memory
592 interface to the modem processor which runs the baseband
593 stack and controls some vital subsystems
594 (clock and power control, etc).
595
596config ARCH_SHMOBILE
597 bool "Renesas SH-Mobile"
598 help
599 Support for Renesas's SH-Mobile ARM platforms
600
601config ARCH_RPC
602 bool "RiscPC"
603 select ARCH_ACORN
604 select FIQ
605 select TIMER_ACORN
606 select ARCH_MAY_HAVE_PC_FDC
607 select HAVE_PATA_PLATFORM
608 select ISA_DMA_API
609 select NO_IOPORT
610 select ARCH_SPARSEMEM_ENABLE
611 select ARCH_USES_GETTIMEOFFSET
612 help
613 On the Acorn Risc-PC, Linux can support the internal IDE disk and
614 CD-ROM interface, serial and parallel port, and the floppy drive.
615
616config ARCH_SA1100
617 bool "SA1100-based"
618 select CPU_SA1100
619 select ISA
620 select ARCH_SPARSEMEM_ENABLE
621 select ARCH_MTD_XIP
622 select ARCH_HAS_CPUFREQ
623 select CPU_FREQ
624 select GENERIC_CLOCKEVENTS
625 select HAVE_CLK
626 select TICK_ONESHOT
627 select ARCH_REQUIRE_GPIOLIB
628 help
629 Support for StrongARM 11x0 based boards.
630
631config ARCH_S3C2410
632 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
633 select GENERIC_GPIO
634 select ARCH_HAS_CPUFREQ
635 select HAVE_CLK
636 select ARCH_USES_GETTIMEOFFSET
637 help
638 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
639 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
640 the Samsung SMDK2410 development board (and derivatives).
641
642 Note, the S3C2416 and the S3C2450 are so close that they even share
643 the same SoC ID code. This means that there is no seperate machine
644 directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
645
646config ARCH_S3C64XX
647 bool "Samsung S3C64XX"
648 select PLAT_SAMSUNG
649 select CPU_V6
650 select ARM_VIC
651 select HAVE_CLK
652 select NO_IOPORT
653 select ARCH_USES_GETTIMEOFFSET
654 select ARCH_HAS_CPUFREQ
655 select ARCH_REQUIRE_GPIOLIB
656 select SAMSUNG_CLKSRC
657 select SAMSUNG_IRQ_VIC_TIMER
658 select SAMSUNG_IRQ_UART
659 select S3C_GPIO_TRACK
660 select S3C_GPIO_PULL_UPDOWN
661 select S3C_GPIO_CFG_S3C24XX
662 select S3C_GPIO_CFG_S3C64XX
663 select S3C_DEV_NAND
664 select USB_ARCH_HAS_OHCI
665 select SAMSUNG_GPIOLIB_4BIT
666 help
667 Samsung S3C64XX series based systems
668
669config ARCH_S5P6440
670 bool "Samsung S5P6440"
671 select CPU_V6
672 select GENERIC_GPIO
673 select HAVE_CLK
674 select ARCH_USES_GETTIMEOFFSET
675 help
676 Samsung S5P6440 CPU based systems
677
678config ARCH_S5P6442
679 bool "Samsung S5P6442"
680 select CPU_V6
681 select GENERIC_GPIO
682 select HAVE_CLK
683 select ARCH_USES_GETTIMEOFFSET
684 help
685 Samsung S5P6442 CPU based systems
686
687config ARCH_S5PC100
688 bool "Samsung S5PC100"
689 select GENERIC_GPIO
690 select HAVE_CLK
691 select CPU_V7
692 select ARM_L1_CACHE_SHIFT_6
693 select ARCH_USES_GETTIMEOFFSET
694 help
695 Samsung S5PC100 series based systems
696
697config ARCH_S5PV210
698 bool "Samsung S5PV210/S5PC110"
699 select CPU_V7
700 select GENERIC_GPIO
701 select HAVE_CLK
702 select ARM_L1_CACHE_SHIFT_6
703 select ARCH_USES_GETTIMEOFFSET
704 help
705 Samsung S5PV210/S5PC110 series based systems
706
707config ARCH_SHARK
708 bool "Shark"
709 select CPU_SA110
710 select ISA
711 select ISA_DMA
712 select ZONE_DMA
713 select PCI
714 select ARCH_USES_GETTIMEOFFSET
715 help
716 Support for the StrongARM based Digital DNARD machine, also known
717 as "Shark" (<http://www.shark-linux.de/shark.html>).
718
719config ARCH_LH7A40X
720 bool "Sharp LH7A40X"
721 select CPU_ARM922T
722 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
723 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
724 select ARCH_USES_GETTIMEOFFSET
725 help
726 Say Y here for systems based on one of the Sharp LH7A40X
727 System on a Chip processors. These CPUs include an ARM922T
728 core with a wide array of integrated devices for
729 hand-held and low-power applications.
730
731config ARCH_U300
732 bool "ST-Ericsson U300 Series"
733 depends on MMU
734 select CPU_ARM926T
735 select HAVE_TCM
736 select ARM_AMBA
737 select ARM_VIC
738 select GENERIC_CLOCKEVENTS
739 select COMMON_CLKDEV
740 select GENERIC_GPIO
741 help
742 Support for ST-Ericsson U300 series mobile platforms.
743
744config ARCH_U8500
745 bool "ST-Ericsson U8500 Series"
746 select CPU_V7
747 select ARM_AMBA
748 select GENERIC_CLOCKEVENTS
749 select COMMON_CLKDEV
750 select ARCH_REQUIRE_GPIOLIB
751 help
752 Support for ST-Ericsson's Ux500 architecture
753
754config ARCH_NOMADIK
755 bool "STMicroelectronics Nomadik"
756 select ARM_AMBA
757 select ARM_VIC
758 select CPU_ARM926T
759 select COMMON_CLKDEV
760 select GENERIC_CLOCKEVENTS
761 select ARCH_REQUIRE_GPIOLIB
762 help
763 Support for the Nomadik platform by ST-Ericsson
764
765config ARCH_DAVINCI
766 bool "TI DaVinci"
767 select GENERIC_CLOCKEVENTS
768 select ARCH_REQUIRE_GPIOLIB
769 select ZONE_DMA
770 select HAVE_IDE
771 select COMMON_CLKDEV
772 select GENERIC_ALLOCATOR
773 select ARCH_HAS_HOLES_MEMORYMODEL
774 help
775 Support for TI's DaVinci platform.
776
777config ARCH_OMAP
778 bool "TI OMAP"
779 select HAVE_CLK
780 select ARCH_REQUIRE_GPIOLIB
781 select ARCH_HAS_CPUFREQ
782 select GENERIC_CLOCKEVENTS
783 select ARCH_HAS_HOLES_MEMORYMODEL
784 help
785 Support for TI's OMAP platform (OMAP1 and OMAP2).
786
787config PLAT_SPEAR
788 bool "ST SPEAr"
789 select ARM_AMBA
790 select ARCH_REQUIRE_GPIOLIB
791 select COMMON_CLKDEV
792 select GENERIC_CLOCKEVENTS
793 select HAVE_CLK
794 help
795 Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
796
797endchoice
798
799#
800# This is sorted alphabetically by mach-* pathname. However, plat-*
801# Kconfigs may be included either alphabetically (according to the
802# plat- suffix) or along side the corresponding mach-* source.
803#
804source "arch/arm/mach-aaec2000/Kconfig"
805
806source "arch/arm/mach-at91/Kconfig"
807
808source "arch/arm/mach-bcmring/Kconfig"
809
810source "arch/arm/mach-clps711x/Kconfig"
811
812source "arch/arm/mach-cns3xxx/Kconfig"
813
814source "arch/arm/mach-davinci/Kconfig"
815
816source "arch/arm/mach-dove/Kconfig"
817
818source "arch/arm/mach-ep93xx/Kconfig"
819
820source "arch/arm/mach-footbridge/Kconfig"
821
822source "arch/arm/mach-gemini/Kconfig"
823
824source "arch/arm/mach-h720x/Kconfig"
825
826source "arch/arm/mach-integrator/Kconfig"
827
828source "arch/arm/mach-iop32x/Kconfig"
829
830source "arch/arm/mach-iop33x/Kconfig"
831
832source "arch/arm/mach-iop13xx/Kconfig"
833
834source "arch/arm/mach-ixp4xx/Kconfig"
835
836source "arch/arm/mach-ixp2000/Kconfig"
837
838source "arch/arm/mach-ixp23xx/Kconfig"
839
840source "arch/arm/mach-kirkwood/Kconfig"
841
842source "arch/arm/mach-ks8695/Kconfig"
843
844source "arch/arm/mach-lh7a40x/Kconfig"
845
846source "arch/arm/mach-loki/Kconfig"
847
848source "arch/arm/mach-msm/Kconfig"
849
850source "arch/arm/mach-mv78xx0/Kconfig"
851
852source "arch/arm/plat-mxc/Kconfig"
853
854source "arch/arm/mach-netx/Kconfig"
855
856source "arch/arm/mach-nomadik/Kconfig"
857source "arch/arm/plat-nomadik/Kconfig"
858
859source "arch/arm/mach-ns9xxx/Kconfig"
860
861source "arch/arm/mach-nuc93x/Kconfig"
862
863source "arch/arm/plat-omap/Kconfig"
864
865source "arch/arm/mach-omap1/Kconfig"
866
867source "arch/arm/mach-omap2/Kconfig"
868
869source "arch/arm/mach-orion5x/Kconfig"
870
871source "arch/arm/mach-pxa/Kconfig"
872source "arch/arm/plat-pxa/Kconfig"
873
874source "arch/arm/mach-mmp/Kconfig"
875
876source "arch/arm/mach-realview/Kconfig"
877
878source "arch/arm/mach-sa1100/Kconfig"
879
880source "arch/arm/plat-samsung/Kconfig"
881source "arch/arm/plat-s3c24xx/Kconfig"
882source "arch/arm/plat-s5p/Kconfig"
883
884source "arch/arm/plat-spear/Kconfig"
885
886if ARCH_S3C2410
887source "arch/arm/mach-s3c2400/Kconfig"
888source "arch/arm/mach-s3c2410/Kconfig"
889source "arch/arm/mach-s3c2412/Kconfig"
890source "arch/arm/mach-s3c2416/Kconfig"
891source "arch/arm/mach-s3c2440/Kconfig"
892source "arch/arm/mach-s3c2443/Kconfig"
893endif
894
895if ARCH_S3C64XX
896source "arch/arm/mach-s3c64xx/Kconfig"
897endif
898
899source "arch/arm/mach-s5p6440/Kconfig"
900
901source "arch/arm/mach-s5p6442/Kconfig"
902
903source "arch/arm/mach-s5pc100/Kconfig"
904
905source "arch/arm/mach-s5pv210/Kconfig"
906
907source "arch/arm/mach-shmobile/Kconfig"
908
909source "arch/arm/plat-stmp3xxx/Kconfig"
910
911source "arch/arm/mach-u300/Kconfig"
912
913source "arch/arm/mach-ux500/Kconfig"
914
915source "arch/arm/mach-versatile/Kconfig"
916
917source "arch/arm/mach-vexpress/Kconfig"
918
919source "arch/arm/mach-w90x900/Kconfig"
920
921# Definitions to make life easier
922config ARCH_ACORN
923 bool
924
925config PLAT_IOP
926 bool
927 select GENERIC_CLOCKEVENTS
928
929config PLAT_ORION
930 bool
931
932config PLAT_PXA
933 bool
934
935config PLAT_VERSATILE
936 bool
937
938config ARM_TIMER_SP804
939 bool
940
941source arch/arm/mm/Kconfig
942
943config IWMMXT
944 bool "Enable iWMMXt support"
945 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
946 default y if PXA27x || PXA3xx || ARCH_MMP
947 help
948 Enable support for iWMMXt context switching at run time if
949 running on a CPU that supports it.
950
951# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
952config XSCALE_PMU
953 bool
954 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
955 default y
956
957config CPU_HAS_PMU
958 depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
959 (!ARCH_OMAP3 || OMAP3_EMU)
960 default y
961 bool
962
963if !MMU
964source "arch/arm/Kconfig-nommu"
965endif
966
967config ARM_ERRATA_411920
968 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
969 depends on CPU_V6 && !SMP
970 help
971 Invalidation of the Instruction Cache operation can
972 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
973 It does not affect the MPCore. This option enables the ARM Ltd.
974 recommended workaround.
975
976config ARM_ERRATA_430973
977 bool "ARM errata: Stale prediction on replaced interworking branch"
978 depends on CPU_V7
979 help
980 This option enables the workaround for the 430973 Cortex-A8
981 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
982 interworking branch is replaced with another code sequence at the
983 same virtual address, whether due to self-modifying code or virtual
984 to physical address re-mapping, Cortex-A8 does not recover from the
985 stale interworking branch prediction. This results in Cortex-A8
986 executing the new code sequence in the incorrect ARM or Thumb state.
987 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
988 and also flushes the branch target cache at every context switch.
989 Note that setting specific bits in the ACTLR register may not be
990 available in non-secure mode.
991
992config ARM_ERRATA_458693
993 bool "ARM errata: Processor deadlock when a false hazard is created"
994 depends on CPU_V7
995 help
996 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
997 erratum. For very specific sequences of memory operations, it is
998 possible for a hazard condition intended for a cache line to instead
999 be incorrectly associated with a different cache line. This false
1000 hazard might then cause a processor deadlock. The workaround enables
1001 the L1 caching of the NEON accesses and disables the PLD instruction
1002 in the ACTLR register. Note that setting specific bits in the ACTLR
1003 register may not be available in non-secure mode.
1004
1005config ARM_ERRATA_460075
1006 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1007 depends on CPU_V7
1008 help
1009 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1010 erratum. Any asynchronous access to the L2 cache may encounter a
1011 situation in which recent store transactions to the L2 cache are lost
1012 and overwritten with stale memory contents from external memory. The
1013 workaround disables the write-allocate mode for the L2 cache via the
1014 ACTLR register. Note that setting specific bits in the ACTLR register
1015 may not be available in non-secure mode.
1016
1017config PL310_ERRATA_588369
1018 bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1019 depends on CACHE_L2X0 && ARCH_OMAP4
1020 help
1021 The PL310 L2 cache controller implements three types of Clean &
1022 Invalidate maintenance operations: by Physical Address
1023 (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1024 They are architecturally defined to behave as the execution of a
1025 clean operation followed immediately by an invalidate operation,
1026 both performing to the same memory location. This functionality
1027 is not correctly implemented in PL310 as clean lines are not
1028 invalidated as a result of these operations. Note that this errata
1029 uses Texas Instrument's secure monitor api.
1030endmenu
1031
1032source "arch/arm/common/Kconfig"
1033
1034config FORCE_MAX_ZONEORDER
1035 int
1036 depends on SA1111
1037 default "9"
1038
1039menu "Bus support"
1040
1041config ARM_AMBA
1042 bool
1043
1044config ISA
1045 bool
1046 help
1047 Find out whether you have ISA slots on your motherboard. ISA is the
1048 name of a bus system, i.e. the way the CPU talks to the other stuff
1049 inside your box. Other bus systems are PCI, EISA, MicroChannel
1050 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1051 newer boards don't support it. If you have ISA, say Y, otherwise N.
1052
1053# Select ISA DMA controller support
1054config ISA_DMA
1055 bool
1056 select ISA_DMA_API
1057
1058# Select ISA DMA interface
1059config ISA_DMA_API
1060 bool
1061
1062config PCI
1063 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
1064 help
1065 Find out whether you have a PCI motherboard. PCI is the name of a
1066 bus system, i.e. the way the CPU talks to the other stuff inside
1067 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1068 VESA. If you have PCI, say Y, otherwise N.
1069
1070config PCI_DOMAINS
1071 bool
1072 depends on PCI
1073
1074config PCI_SYSCALL
1075 def_bool PCI
1076
1077# Select the host bridge type
1078config PCI_HOST_VIA82C505
1079 bool
1080 depends on PCI && ARCH_SHARK
1081 default y
1082
1083config PCI_HOST_ITE8152
1084 bool
1085 depends on PCI && MACH_ARMCORE
1086 default y
1087 select DMABOUNCE
1088
1089source "drivers/pci/Kconfig"
1090
1091source "drivers/pcmcia/Kconfig"
1092
1093endmenu
1094
1095menu "Kernel Features"
1096
1097source "kernel/time/Kconfig"
1098
1099config SMP
1100 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1101 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1102 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
1103 ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1104 depends on GENERIC_CLOCKEVENTS
1105 select USE_GENERIC_SMP_HELPERS
1106 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1107 help
1108 This enables support for systems with more than one CPU. If you have
1109 a system with only one CPU, like most personal computers, say N. If
1110 you have a system with more than one CPU, say Y.
1111
1112 If you say N here, the kernel will run on single and multiprocessor
1113 machines, but will use only one CPU of a multiprocessor machine. If
1114 you say Y here, the kernel will run on many, but not all, single
1115 processor machines. On a single processor machine, the kernel will
1116 run faster if you say N here.
1117
1118 See also <file:Documentation/i386/IO-APIC.txt>,
1119 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1120 <http://www.linuxdoc.org/docs.html#howto>.
1121
1122 If you don't know what to do here, say N.
1123
1124config HAVE_ARM_SCU
1125 bool
1126 depends on SMP
1127 help
1128 This option enables support for the ARM system coherency unit
1129
1130config HAVE_ARM_TWD
1131 bool
1132 depends on SMP
1133 help
1134 This options enables support for the ARM timer and watchdog unit
1135
1136choice
1137 prompt "Memory split"
1138 default VMSPLIT_3G
1139 help
1140 Select the desired split between kernel and user memory.
1141
1142 If you are not absolutely sure what you are doing, leave this
1143 option alone!
1144
1145 config VMSPLIT_3G
1146 bool "3G/1G user/kernel split"
1147 config VMSPLIT_2G
1148 bool "2G/2G user/kernel split"
1149 config VMSPLIT_1G
1150 bool "1G/3G user/kernel split"
1151endchoice
1152
1153config PAGE_OFFSET
1154 hex
1155 default 0x40000000 if VMSPLIT_1G
1156 default 0x80000000 if VMSPLIT_2G
1157 default 0xC0000000
1158
1159config NR_CPUS
1160 int "Maximum number of CPUs (2-32)"
1161 range 2 32
1162 depends on SMP
1163 default "4"
1164
1165config HOTPLUG_CPU
1166 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1167 depends on SMP && HOTPLUG && EXPERIMENTAL
1168 help
1169 Say Y here to experiment with turning CPUs off and on. CPUs
1170 can be controlled through /sys/devices/system/cpu.
1171
1172config LOCAL_TIMERS
1173 bool "Use local timer interrupts"
1174 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1175 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1176 default y
1177 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1178 help
1179 Enable support for local timers on SMP platforms, rather then the
1180 legacy IPI broadcast method. Local timers allows the system
1181 accounting to be spread across the timer interval, preventing a
1182 "thundering herd" at every timer tick.
1183
1184source kernel/Kconfig.preempt
1185
1186config HZ
1187 int
1188 default 128 if ARCH_L7200
1189 default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
1190 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1191 default AT91_TIMER_HZ if ARCH_AT91
1192 default 100
1193
1194config THUMB2_KERNEL
1195 bool "Compile the kernel in Thumb-2 mode"
1196 depends on CPU_V7 && EXPERIMENTAL
1197 select AEABI
1198 select ARM_ASM_UNIFIED
1199 help
1200 By enabling this option, the kernel will be compiled in
1201 Thumb-2 mode. A compiler/assembler that understand the unified
1202 ARM-Thumb syntax is needed.
1203
1204 If unsure, say N.
1205
1206config ARM_ASM_UNIFIED
1207 bool
1208
1209config AEABI
1210 bool "Use the ARM EABI to compile the kernel"
1211 help
1212 This option allows for the kernel to be compiled using the latest
1213 ARM ABI (aka EABI). This is only useful if you are using a user
1214 space environment that is also compiled with EABI.
1215
1216 Since there are major incompatibilities between the legacy ABI and
1217 EABI, especially with regard to structure member alignment, this
1218 option also changes the kernel syscall calling convention to
1219 disambiguate both ABIs and allow for backward compatibility support
1220 (selected with CONFIG_OABI_COMPAT).
1221
1222 To use this you need GCC version 4.0.0 or later.
1223
1224config OABI_COMPAT
1225 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1226 depends on AEABI && EXPERIMENTAL
1227 default y
1228 help
1229 This option preserves the old syscall interface along with the
1230 new (ARM EABI) one. It also provides a compatibility layer to
1231 intercept syscalls that have structure arguments which layout
1232 in memory differs between the legacy ABI and the new ARM EABI
1233 (only for non "thumb" binaries). This option adds a tiny
1234 overhead to all syscalls and produces a slightly larger kernel.
1235 If you know you'll be using only pure EABI user space then you
1236 can say N here. If this option is not selected and you attempt
1237 to execute a legacy ABI binary then the result will be
1238 UNPREDICTABLE (in fact it can be predicted that it won't work
1239 at all). If in doubt say Y.
1240
1241config ARCH_HAS_HOLES_MEMORYMODEL
1242 bool
1243
1244# Discontigmem is deprecated
1245config ARCH_DISCONTIGMEM_ENABLE
1246 bool
1247
1248config ARCH_SPARSEMEM_ENABLE
1249 bool
1250
1251config ARCH_SPARSEMEM_DEFAULT
1252 def_bool ARCH_SPARSEMEM_ENABLE
1253
1254config ARCH_SELECT_MEMORY_MODEL
1255 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1256
1257config NODES_SHIFT
1258 int
1259 default "4" if ARCH_LH7A40X
1260 default "2"
1261 depends on NEED_MULTIPLE_NODES
1262
1263config HIGHMEM
1264 bool "High Memory Support (EXPERIMENTAL)"
1265 depends on MMU && EXPERIMENTAL
1266 help
1267 The address space of ARM processors is only 4 Gigabytes large
1268 and it has to accommodate user address space, kernel address
1269 space as well as some memory mapped IO. That means that, if you
1270 have a large amount of physical memory and/or IO, not all of the
1271 memory can be "permanently mapped" by the kernel. The physical
1272 memory that is not permanently mapped is called "high memory".
1273
1274 Depending on the selected kernel/user memory split, minimum
1275 vmalloc space and actual amount of RAM, you may not need this
1276 option which should result in a slightly faster kernel.
1277
1278 If unsure, say n.
1279
1280config HIGHPTE
1281 bool "Allocate 2nd-level pagetables from highmem"
1282 depends on HIGHMEM
1283 depends on !OUTER_CACHE
1284
1285config HW_PERF_EVENTS
1286 bool "Enable hardware performance counter support for perf events"
1287 depends on PERF_EVENTS && CPU_HAS_PMU
1288 default y
1289 help
1290 Enable hardware performance counter support for perf events. If
1291 disabled, perf events will use software events only.
1292
1293source "mm/Kconfig"
1294
1295config LEDS
1296 bool "Timer and CPU usage LEDs"
1297 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1298 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1299 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1300 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1301 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1302 ARCH_AT91 || ARCH_DAVINCI || \
1303 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1304 help
1305 If you say Y here, the LEDs on your machine will be used
1306 to provide useful information about your current system status.
1307
1308 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1309 be able to select which LEDs are active using the options below. If
1310 you are compiling a kernel for the EBSA-110 or the LART however, the
1311 red LED will simply flash regularly to indicate that the system is
1312 still functional. It is safe to say Y here if you have a CATS
1313 system, but the driver will do nothing.
1314
1315config LEDS_TIMER
1316 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1317 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1318 || MACH_OMAP_PERSEUS2
1319 depends on LEDS
1320 depends on !GENERIC_CLOCKEVENTS
1321 default y if ARCH_EBSA110
1322 help
1323 If you say Y here, one of the system LEDs (the green one on the
1324 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1325 will flash regularly to indicate that the system is still
1326 operational. This is mainly useful to kernel hackers who are
1327 debugging unstable kernels.
1328
1329 The LART uses the same LED for both Timer LED and CPU usage LED
1330 functions. You may choose to use both, but the Timer LED function
1331 will overrule the CPU usage LED.
1332
1333config LEDS_CPU
1334 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1335 !ARCH_OMAP) \
1336 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1337 || MACH_OMAP_PERSEUS2
1338 depends on LEDS
1339 help
1340 If you say Y here, the red LED will be used to give a good real
1341 time indication of CPU usage, by lighting whenever the idle task
1342 is not currently executing.
1343
1344 The LART uses the same LED for both Timer LED and CPU usage LED
1345 functions. You may choose to use both, but the Timer LED function
1346 will overrule the CPU usage LED.
1347
1348config ALIGNMENT_TRAP
1349 bool
1350 depends on CPU_CP15_MMU
1351 default y if !ARCH_EBSA110
1352 select HAVE_PROC_CPU if PROC_FS
1353 help
1354 ARM processors cannot fetch/store information which is not
1355 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1356 address divisible by 4. On 32-bit ARM processors, these non-aligned
1357 fetch/store instructions will be emulated in software if you say
1358 here, which has a severe performance impact. This is necessary for
1359 correct operation of some network protocols. With an IP-only
1360 configuration it is safe to say N, otherwise say Y.
1361
1362config UACCESS_WITH_MEMCPY
1363 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1364 depends on MMU && EXPERIMENTAL
1365 default y if CPU_FEROCEON
1366 help
1367 Implement faster copy_to_user and clear_user methods for CPU
1368 cores where a 8-word STM instruction give significantly higher
1369 memory write throughput than a sequence of individual 32bit stores.
1370
1371 A possible side effect is a slight increase in scheduling latency
1372 between threads sharing the same address space if they invoke
1373 such copy operations with large buffers.
1374
1375 However, if the CPU data cache is using a write-allocate mode,
1376 this option is unlikely to provide any performance gain.
1377
1378endmenu
1379
1380menu "Boot options"
1381
1382# Compressed boot loader in ROM. Yes, we really want to ask about
1383# TEXT and BSS so we preserve their values in the config files.
1384config ZBOOT_ROM_TEXT
1385 hex "Compressed ROM boot loader base address"
1386 default "0"
1387 help
1388 The physical address at which the ROM-able zImage is to be
1389 placed in the target. Platforms which normally make use of
1390 ROM-able zImage formats normally set this to a suitable
1391 value in their defconfig file.
1392
1393 If ZBOOT_ROM is not enabled, this has no effect.
1394
1395config ZBOOT_ROM_BSS
1396 hex "Compressed ROM boot loader BSS address"
1397 default "0"
1398 help
1399 The base address of an area of read/write memory in the target
1400 for the ROM-able zImage which must be available while the
1401 decompressor is running. It must be large enough to hold the
1402 entire decompressed kernel plus an additional 128 KiB.
1403 Platforms which normally make use of ROM-able zImage formats
1404 normally set this to a suitable value in their defconfig file.
1405
1406 If ZBOOT_ROM is not enabled, this has no effect.
1407
1408config ZBOOT_ROM
1409 bool "Compressed boot loader in ROM/flash"
1410 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1411 help
1412 Say Y here if you intend to execute your compressed kernel image
1413 (zImage) directly from ROM or flash. If unsure, say N.
1414
1415config CMDLINE
1416 string "Default kernel command string"
1417 default ""
1418 help
1419 On some architectures (EBSA110 and CATS), there is currently no way
1420 for the boot loader to pass arguments to the kernel. For these
1421 architectures, you should supply some command-line options at build
1422 time by entering them here. As a minimum, you should specify the
1423 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1424
1425config CMDLINE_FORCE
1426 bool "Always use the default kernel command string"
1427 depends on CMDLINE != ""
1428 help
1429 Always use the default kernel command string, even if the boot
1430 loader passes other arguments to the kernel.
1431 This is useful if you cannot or don't want to change the
1432 command-line options your boot loader passes to the kernel.
1433
1434 If unsure, say N.
1435
1436config XIP_KERNEL
1437 bool "Kernel Execute-In-Place from ROM"
1438 depends on !ZBOOT_ROM
1439 help
1440 Execute-In-Place allows the kernel to run from non-volatile storage
1441 directly addressable by the CPU, such as NOR flash. This saves RAM
1442 space since the text section of the kernel is not loaded from flash
1443 to RAM. Read-write sections, such as the data section and stack,
1444 are still copied to RAM. The XIP kernel is not compressed since
1445 it has to run directly from flash, so it will take more space to
1446 store it. The flash address used to link the kernel object files,
1447 and for storing it, is configuration dependent. Therefore, if you
1448 say Y here, you must know the proper physical address where to
1449 store the kernel image depending on your own flash memory usage.
1450
1451 Also note that the make target becomes "make xipImage" rather than
1452 "make zImage" or "make Image". The final kernel binary to put in
1453 ROM memory will be arch/arm/boot/xipImage.
1454
1455 If unsure, say N.
1456
1457config XIP_PHYS_ADDR
1458 hex "XIP Kernel Physical Location"
1459 depends on XIP_KERNEL
1460 default "0x00080000"
1461 help
1462 This is the physical address in your flash memory the kernel will
1463 be linked for and stored to. This address is dependent on your
1464 own flash usage.
1465
1466config KEXEC
1467 bool "Kexec system call (EXPERIMENTAL)"
1468 depends on EXPERIMENTAL
1469 help
1470 kexec is a system call that implements the ability to shutdown your
1471 current kernel, and to start another kernel. It is like a reboot
1472 but it is independent of the system firmware. And like a reboot
1473 you can start any kernel with it, not just Linux.
1474
1475 It is an ongoing process to be certain the hardware in a machine
1476 is properly shutdown, so do not be surprised if this code does not
1477 initially work for you. It may help to enable device hotplugging
1478 support.
1479
1480config ATAGS_PROC
1481 bool "Export atags in procfs"
1482 depends on KEXEC
1483 default y
1484 help
1485 Should the atags used to boot the kernel be exported in an "atags"
1486 file in procfs. Useful with kexec.
1487
1488endmenu
1489
1490menu "CPU Power Management"
1491
1492if ARCH_HAS_CPUFREQ
1493
1494source "drivers/cpufreq/Kconfig"
1495
1496config CPU_FREQ_SA1100
1497 bool
1498
1499config CPU_FREQ_SA1110
1500 bool
1501
1502config CPU_FREQ_INTEGRATOR
1503 tristate "CPUfreq driver for ARM Integrator CPUs"
1504 depends on ARCH_INTEGRATOR && CPU_FREQ
1505 default y
1506 help
1507 This enables the CPUfreq driver for ARM Integrator CPUs.
1508
1509 For details, take a look at <file:Documentation/cpu-freq>.
1510
1511 If in doubt, say Y.
1512
1513config CPU_FREQ_PXA
1514 bool
1515 depends on CPU_FREQ && ARCH_PXA && PXA25x
1516 default y
1517 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1518
1519config CPU_FREQ_S3C64XX
1520 bool "CPUfreq support for Samsung S3C64XX CPUs"
1521 depends on CPU_FREQ && CPU_S3C6410
1522
1523config CPU_FREQ_S3C
1524 bool
1525 help
1526 Internal configuration node for common cpufreq on Samsung SoC
1527
1528config CPU_FREQ_S3C24XX
1529 bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1530 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1531 select CPU_FREQ_S3C
1532 help
1533 This enables the CPUfreq driver for the Samsung S3C24XX family
1534 of CPUs.
1535
1536 For details, take a look at <file:Documentation/cpu-freq>.
1537
1538 If in doubt, say N.
1539
1540config CPU_FREQ_S3C24XX_PLL
1541 bool "Support CPUfreq changing of PLL frequency"
1542 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1543 help
1544 Compile in support for changing the PLL frequency from the
1545 S3C24XX series CPUfreq driver. The PLL takes time to settle
1546 after a frequency change, so by default it is not enabled.
1547
1548 This also means that the PLL tables for the selected CPU(s) will
1549 be built which may increase the size of the kernel image.
1550
1551config CPU_FREQ_S3C24XX_DEBUG
1552 bool "Debug CPUfreq Samsung driver core"
1553 depends on CPU_FREQ_S3C24XX
1554 help
1555 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1556
1557config CPU_FREQ_S3C24XX_IODEBUG
1558 bool "Debug CPUfreq Samsung driver IO timing"
1559 depends on CPU_FREQ_S3C24XX
1560 help
1561 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1562
1563config CPU_FREQ_S3C24XX_DEBUGFS
1564 bool "Export debugfs for CPUFreq"
1565 depends on CPU_FREQ_S3C24XX && DEBUG_FS
1566 help
1567 Export status information via debugfs.
1568
1569endif
1570
1571source "drivers/cpuidle/Kconfig"
1572
1573endmenu
1574
1575menu "Floating point emulation"
1576
1577comment "At least one emulation must be selected"
1578
1579config FPE_NWFPE
1580 bool "NWFPE math emulation"
1581 depends on !AEABI || OABI_COMPAT
1582 ---help---
1583 Say Y to include the NWFPE floating point emulator in the kernel.
1584 This is necessary to run most binaries. Linux does not currently
1585 support floating point hardware so you need to say Y here even if
1586 your machine has an FPA or floating point co-processor podule.
1587
1588 You may say N here if you are going to load the Acorn FPEmulator
1589 early in the bootup.
1590
1591config FPE_NWFPE_XP
1592 bool "Support extended precision"
1593 depends on FPE_NWFPE
1594 help
1595 Say Y to include 80-bit support in the kernel floating-point
1596 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1597 Note that gcc does not generate 80-bit operations by default,
1598 so in most cases this option only enlarges the size of the
1599 floating point emulator without any good reason.
1600
1601 You almost surely want to say N here.
1602
1603config FPE_FASTFPE
1604 bool "FastFPE math emulation (EXPERIMENTAL)"
1605 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1606 ---help---
1607 Say Y here to include the FAST floating point emulator in the kernel.
1608 This is an experimental much faster emulator which now also has full
1609 precision for the mantissa. It does not support any exceptions.
1610 It is very simple, and approximately 3-6 times faster than NWFPE.
1611
1612 It should be sufficient for most programs. It may be not suitable
1613 for scientific calculations, but you have to check this for yourself.
1614 If you do not feel you need a faster FP emulation you should better
1615 choose NWFPE.
1616
1617config VFP
1618 bool "VFP-format floating point maths"
1619 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1620 help
1621 Say Y to include VFP support code in the kernel. This is needed
1622 if your hardware includes a VFP unit.
1623
1624 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1625 release notes and additional status information.
1626
1627 Say N if your target does not have VFP hardware.
1628
1629config VFPv3
1630 bool
1631 depends on VFP
1632 default y if CPU_V7
1633
1634config NEON
1635 bool "Advanced SIMD (NEON) Extension support"
1636 depends on VFPv3 && CPU_V7
1637 help
1638 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1639 Extension.
1640
1641endmenu
1642
1643menu "Userspace binary formats"
1644
1645source "fs/Kconfig.binfmt"
1646
1647config ARTHUR
1648 tristate "RISC OS personality"
1649 depends on !AEABI
1650 help
1651 Say Y here to include the kernel code necessary if you want to run
1652 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1653 experimental; if this sounds frightening, say N and sleep in peace.
1654 You can also say M here to compile this support as a module (which
1655 will be called arthur).
1656
1657endmenu
1658
1659menu "Power management options"
1660
1661source "kernel/power/Kconfig"
1662
1663config ARCH_SUSPEND_POSSIBLE
1664 def_bool y
1665
1666endmenu
1667
1668source "net/Kconfig"
1669
1670source "drivers/Kconfig"
1671
1672source "fs/Kconfig"
1673
1674source "arch/arm/Kconfig.debug"
1675
1676source "security/Kconfig"
1677
1678source "crypto/Kconfig"
1679
1680source "lib/Kconfig"