7 select SYS_SUPPORTS_APM_EMULATION
8 select GENERIC_ATOMIC64 if (!CPU_32v6K)
9 select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
11 select HAVE_KPROBES if (!XIP_KERNEL)
12 select HAVE_KRETPROBES if (HAVE_KPROBES)
13 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
14 select HAVE_GENERIC_DMA_COHERENT
15 select HAVE_KERNEL_GZIP
16 select HAVE_KERNEL_LZO
17 select HAVE_KERNEL_LZMA
18 select HAVE_PERF_EVENTS
19 select PERF_USE_VMALLOC
21 The ARM series is a line of low-power-consumption RISC chip designs
22 licensed by ARM Ltd and targeted at embedded applications and
23 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
24 manufactured, but legacy ARM-based PC hardware remains popular in
25 Europe. There is an ARM Linux project with a web page at
26 <http://www.arm.linux.org.uk/>.
31 config SYS_SUPPORTS_APM_EMULATION
41 config ARCH_USES_GETTIMEOFFSET
45 config GENERIC_CLOCKEVENTS
48 config GENERIC_CLOCKEVENTS_BROADCAST
50 depends on GENERIC_CLOCKEVENTS
51 default y if SMP && !LOCAL_TIMERS
55 select GENERIC_ALLOCATOR
66 The Extended Industry Standard Architecture (EISA) bus was
67 developed as an open alternative to the IBM MicroChannel bus.
69 The EISA bus provided some of the features of the IBM MicroChannel
70 bus while maintaining backward compatibility with cards made for
71 the older ISA bus. The EISA bus saw limited use between 1988 and
72 1995 when it was made obsolete by the PCI bus.
74 Say Y here if you are building a kernel for an EISA-based machine.
84 MicroChannel Architecture is found in some IBM PS/2 machines and
85 laptops. It is a bus system similar to PCI or ISA. See
86 <file:Documentation/mca.txt> (and especially the web page given
87 there) before attempting to build an MCA bus kernel.
89 config GENERIC_HARDIRQS
93 config STACKTRACE_SUPPORT
97 config HAVE_LATENCYTOP_SUPPORT
102 config LOCKDEP_SUPPORT
106 config TRACE_IRQFLAGS_SUPPORT
110 config HARDIRQS_SW_RESEND
114 config GENERIC_IRQ_PROBE
118 config GENERIC_LOCKBREAK
121 depends on SMP && PREEMPT
123 config RWSEM_GENERIC_SPINLOCK
127 config RWSEM_XCHGADD_ALGORITHM
130 config ARCH_HAS_ILOG2_U32
133 config ARCH_HAS_ILOG2_U64
136 config ARCH_HAS_CPUFREQ
139 Internal node to signify that the ARCH has CPUFREQ support
140 and that the relevant menu configurations are displayed for
143 config GENERIC_HWEIGHT
147 config GENERIC_CALIBRATE_DELAY
151 config ARCH_MAY_HAVE_PC_FDC
157 config NEED_DMA_MAP_STATE
160 config GENERIC_ISA_DMA
169 config GENERIC_HARDIRQS_NO__DO_IRQ
172 config ARM_L1_CACHE_SHIFT_6
175 Setting ARM L1 cache line size to 64 Bytes.
179 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
180 default DRAM_BASE if REMAP_VECTORS_TO_RAM
183 The base address of exception vectors.
185 source "init/Kconfig"
187 source "kernel/Kconfig.freezer"
192 bool "MMU-based Paged Memory Management Support"
195 Select if you want MMU-based virtualised addressing space
196 support by paged memory management. If unsure, say 'Y'.
199 # The "ARM system type" choice list is ordered alphabetically by option
200 # text. Please add new entries in the option alphabetic order.
203 prompt "ARM system type"
204 default ARCH_VERSATILE
207 bool "Agilent AAEC-2000 based"
211 select ARCH_USES_GETTIMEOFFSET
213 This enables support for systems based on the Agilent AAEC-2000
215 config ARCH_INTEGRATOR
216 bool "ARM Ltd. Integrator family"
218 select ARCH_HAS_CPUFREQ
221 select GENERIC_CLOCKEVENTS
222 select PLAT_VERSATILE
224 Support for ARM's Integrator platform.
227 bool "ARM Ltd. RealView family"
231 select GENERIC_CLOCKEVENTS
232 select ARCH_WANT_OPTIONAL_GPIOLIB
233 select PLAT_VERSATILE
234 select ARM_TIMER_SP804
235 select GPIO_PL061 if GPIOLIB
237 This enables support for ARM Ltd RealView boards.
239 config ARCH_VERSATILE
240 bool "ARM Ltd. Versatile family"
245 select GENERIC_CLOCKEVENTS
246 select ARCH_WANT_OPTIONAL_GPIOLIB
247 select PLAT_VERSATILE
248 select ARM_TIMER_SP804
250 This enables support for ARM Ltd Versatile board.
253 bool "ARM Ltd. Versatile Express family"
254 select ARCH_WANT_OPTIONAL_GPIOLIB
256 select ARM_TIMER_SP804
258 select GENERIC_CLOCKEVENTS
261 select PLAT_VERSATILE
263 This enables support for the ARM Ltd Versatile Express boards.
267 select ARCH_REQUIRE_GPIOLIB
269 select ARCH_USES_GETTIMEOFFSET
271 This enables support for systems based on the Atmel AT91RM9200,
272 AT91SAM9 and AT91CAP9 processors.
275 bool "Broadcom BCMRING"
280 select GENERIC_CLOCKEVENTS
281 select ARCH_WANT_OPTIONAL_GPIOLIB
283 Support for Broadcom's BCMRing platform.
286 bool "Cirrus Logic CLPS711x/EP721x-based"
288 select ARCH_USES_GETTIMEOFFSET
290 Support for Cirrus Logic 711x/721x based boards.
293 bool "Cavium Networks CNS3XXX family"
295 select GENERIC_CLOCKEVENTS
298 Support for Cavium Networks CNS3XXX platform.
301 bool "Cortina Systems Gemini"
303 select ARCH_REQUIRE_GPIOLIB
304 select ARCH_USES_GETTIMEOFFSET
306 Support for the Cortina Systems Gemini family SoCs
313 select ARCH_USES_GETTIMEOFFSET
315 This is an evaluation board for the StrongARM processor available
316 from Digital. It has limited hardware on-board, including an
317 Ethernet interface, two PCMCIA sockets, two serial ports and a
326 select ARCH_REQUIRE_GPIOLIB
327 select ARCH_HAS_HOLES_MEMORYMODEL
328 select ARCH_USES_GETTIMEOFFSET
330 This enables support for the Cirrus EP93xx series of CPUs.
332 config ARCH_FOOTBRIDGE
336 select ARCH_USES_GETTIMEOFFSET
338 Support for systems based on the DC21285 companion chip
339 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
342 bool "Freescale MXC/iMX-based"
343 select GENERIC_CLOCKEVENTS
344 select ARCH_REQUIRE_GPIOLIB
347 Support for Freescale MXC/iMX-based family of processors
350 bool "Freescale STMP3xxx"
353 select ARCH_REQUIRE_GPIOLIB
354 select GENERIC_CLOCKEVENTS
355 select USB_ARCH_HAS_EHCI
357 Support for systems based on the Freescale 3xxx CPUs.
360 bool "Hilscher NetX based"
363 select GENERIC_CLOCKEVENTS
365 This enables support for systems based on the Hilscher NetX Soc
368 bool "Hynix HMS720x-based"
371 select ARCH_USES_GETTIMEOFFSET
373 This enables support for systems based on the Hynix HMS720x
381 select ARCH_SUPPORTS_MSI
384 Support for Intel's IOP13XX (XScale) family of processors.
392 select ARCH_REQUIRE_GPIOLIB
394 Support for Intel's 80219 and IOP32X (XScale) family of
403 select ARCH_REQUIRE_GPIOLIB
405 Support for Intel's IOP33X (XScale) family of processors.
412 select ARCH_USES_GETTIMEOFFSET
414 Support for Intel's IXP23xx (XScale) family of processors.
417 bool "IXP2400/2800-based"
421 select ARCH_USES_GETTIMEOFFSET
423 Support for Intel's IXP2400/2800 (XScale) family of processors.
430 select GENERIC_CLOCKEVENTS
431 select DMABOUNCE if PCI
433 Support for Intel's IXP4XX (XScale) family of processors.
439 select ARCH_USES_GETTIMEOFFSET
441 Say Y here if you intend to run this kernel on a LinkUp Systems
442 L7200 Software Development Board which uses an ARM720T processor.
443 Information on this board can be obtained at:
445 <http://www.linkupsys.com/>
447 If you have any questions or comments about the Linux kernel port
448 to this board, send e-mail to <sjhill@cotw.com>.
453 select ARCH_REQUIRE_GPIOLIB
454 select GENERIC_CLOCKEVENTS
457 Support for the Marvell Dove SoC 88AP510
460 bool "Marvell Kirkwood"
463 select ARCH_REQUIRE_GPIOLIB
464 select GENERIC_CLOCKEVENTS
467 Support for the following Marvell Kirkwood series SoCs:
468 88F6180, 88F6192 and 88F6281.
471 bool "Marvell Loki (88RC8480)"
473 select GENERIC_CLOCKEVENTS
476 Support for the Marvell Loki (88RC8480) SoC.
479 bool "Marvell MV78xx0"
482 select ARCH_REQUIRE_GPIOLIB
483 select GENERIC_CLOCKEVENTS
486 Support for the following Marvell MV78xx0 series SoCs:
494 select ARCH_REQUIRE_GPIOLIB
495 select GENERIC_CLOCKEVENTS
498 Support for the following Marvell Orion 5x series SoCs:
499 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
500 Orion-2 (5281), Orion-1-90 (6183).
503 bool "Marvell PXA168/910/MMP2"
505 select ARCH_REQUIRE_GPIOLIB
507 select GENERIC_CLOCKEVENTS
511 Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
514 bool "Micrel/Kendin KS8695"
516 select ARCH_REQUIRE_GPIOLIB
517 select ARCH_USES_GETTIMEOFFSET
519 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
520 System-on-Chip devices.
523 bool "NetSilicon NS9xxx"
526 select GENERIC_CLOCKEVENTS
529 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
532 <http://www.digi.com/products/microprocessors/index.jsp>
535 bool "Nuvoton W90X900 CPU"
537 select ARCH_REQUIRE_GPIOLIB
539 select GENERIC_CLOCKEVENTS
541 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
542 At present, the w90x900 has been renamed nuc900, regarding
543 the ARM series product line, you can login the following
544 link address to know more.
546 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
547 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
550 bool "Nuvoton NUC93X CPU"
554 Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
555 low-power and high performance MPEG-4/JPEG multimedia controller chip.
558 bool "Philips Nexperia PNX4008 Mobile"
561 select ARCH_USES_GETTIMEOFFSET
563 This enables support for Philips PNX4008 mobile platform.
566 bool "PXA2xx/PXA3xx-based"
569 select ARCH_HAS_CPUFREQ
571 select ARCH_REQUIRE_GPIOLIB
572 select GENERIC_CLOCKEVENTS
576 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
581 select GENERIC_CLOCKEVENTS
583 Support for Qualcomm MSM/QSD based systems. This runs on the
584 apps processor of the MSM/QSD and depends on a shared memory
585 interface to the modem processor which runs the baseband
586 stack and controls some vital subsystems
587 (clock and power control, etc).
590 bool "Renesas SH-Mobile"
592 Support for Renesas's SH-Mobile ARM platforms
599 select ARCH_MAY_HAVE_PC_FDC
600 select HAVE_PATA_PLATFORM
603 select ARCH_SPARSEMEM_ENABLE
604 select ARCH_USES_GETTIMEOFFSET
606 On the Acorn Risc-PC, Linux can support the internal IDE disk and
607 CD-ROM interface, serial and parallel port, and the floppy drive.
613 select ARCH_SPARSEMEM_ENABLE
615 select ARCH_HAS_CPUFREQ
617 select GENERIC_CLOCKEVENTS
620 select ARCH_REQUIRE_GPIOLIB
622 Support for StrongARM 11x0 based boards.
625 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
627 select ARCH_HAS_CPUFREQ
629 select ARCH_USES_GETTIMEOFFSET
631 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
632 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
633 the Samsung SMDK2410 development board (and derivatives).
635 Note, the S3C2416 and the S3C2450 are so close that they even share
636 the same SoC ID code. This means that there is no seperate machine
637 directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
640 bool "Samsung S3C64XX"
646 select ARCH_USES_GETTIMEOFFSET
647 select ARCH_HAS_CPUFREQ
648 select ARCH_REQUIRE_GPIOLIB
649 select SAMSUNG_CLKSRC
650 select SAMSUNG_IRQ_VIC_TIMER
651 select SAMSUNG_IRQ_UART
652 select S3C_GPIO_TRACK
653 select S3C_GPIO_PULL_UPDOWN
654 select S3C_GPIO_CFG_S3C24XX
655 select S3C_GPIO_CFG_S3C64XX
657 select USB_ARCH_HAS_OHCI
658 select SAMSUNG_GPIOLIB_4BIT
660 Samsung S3C64XX series based systems
663 bool "Samsung S5P6440"
667 select ARCH_USES_GETTIMEOFFSET
669 Samsung S5P6440 CPU based systems
672 bool "Samsung S5P6442"
676 select ARCH_USES_GETTIMEOFFSET
678 Samsung S5P6442 CPU based systems
681 bool "Samsung S5PC100"
685 select ARM_L1_CACHE_SHIFT_6
686 select ARCH_USES_GETTIMEOFFSET
688 Samsung S5PC100 series based systems
691 bool "Samsung S5PV210/S5PC110"
695 select ARM_L1_CACHE_SHIFT_6
696 select ARCH_USES_GETTIMEOFFSET
698 Samsung S5PV210/S5PC110 series based systems
707 select ARCH_USES_GETTIMEOFFSET
709 Support for the StrongARM based Digital DNARD machine, also known
710 as "Shark" (<http://www.shark-linux.de/shark.html>).
715 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
716 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
717 select ARCH_USES_GETTIMEOFFSET
719 Say Y here for systems based on one of the Sharp LH7A40X
720 System on a Chip processors. These CPUs include an ARM922T
721 core with a wide array of integrated devices for
722 hand-held and low-power applications.
725 bool "ST-Ericsson U300 Series"
731 select GENERIC_CLOCKEVENTS
735 Support for ST-Ericsson U300 series mobile platforms.
738 bool "ST-Ericsson U8500 Series"
741 select GENERIC_CLOCKEVENTS
743 select ARCH_REQUIRE_GPIOLIB
745 Support for ST-Ericsson's Ux500 architecture
748 bool "STMicroelectronics Nomadik"
753 select GENERIC_CLOCKEVENTS
754 select ARCH_REQUIRE_GPIOLIB
756 Support for the Nomadik platform by ST-Ericsson
760 select GENERIC_CLOCKEVENTS
761 select ARCH_REQUIRE_GPIOLIB
765 select GENERIC_ALLOCATOR
766 select ARCH_HAS_HOLES_MEMORYMODEL
768 Support for TI's DaVinci platform.
773 select ARCH_REQUIRE_GPIOLIB
774 select ARCH_HAS_CPUFREQ
775 select GENERIC_CLOCKEVENTS
776 select ARCH_HAS_HOLES_MEMORYMODEL
778 Support for TI's OMAP platform (OMAP1 and OMAP2).
783 select ARCH_REQUIRE_GPIOLIB
785 select GENERIC_CLOCKEVENTS
788 Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
793 # This is sorted alphabetically by mach-* pathname. However, plat-*
794 # Kconfigs may be included either alphabetically (according to the
795 # plat- suffix) or along side the corresponding mach-* source.
797 source "arch/arm/mach-aaec2000/Kconfig"
799 source "arch/arm/mach-at91/Kconfig"
801 source "arch/arm/mach-bcmring/Kconfig"
803 source "arch/arm/mach-clps711x/Kconfig"
805 source "arch/arm/mach-cns3xxx/Kconfig"
807 source "arch/arm/mach-davinci/Kconfig"
809 source "arch/arm/mach-dove/Kconfig"
811 source "arch/arm/mach-ep93xx/Kconfig"
813 source "arch/arm/mach-footbridge/Kconfig"
815 source "arch/arm/mach-gemini/Kconfig"
817 source "arch/arm/mach-h720x/Kconfig"
819 source "arch/arm/mach-integrator/Kconfig"
821 source "arch/arm/mach-iop32x/Kconfig"
823 source "arch/arm/mach-iop33x/Kconfig"
825 source "arch/arm/mach-iop13xx/Kconfig"
827 source "arch/arm/mach-ixp4xx/Kconfig"
829 source "arch/arm/mach-ixp2000/Kconfig"
831 source "arch/arm/mach-ixp23xx/Kconfig"
833 source "arch/arm/mach-kirkwood/Kconfig"
835 source "arch/arm/mach-ks8695/Kconfig"
837 source "arch/arm/mach-lh7a40x/Kconfig"
839 source "arch/arm/mach-loki/Kconfig"
841 source "arch/arm/mach-msm/Kconfig"
843 source "arch/arm/mach-mv78xx0/Kconfig"
845 source "arch/arm/plat-mxc/Kconfig"
847 source "arch/arm/mach-netx/Kconfig"
849 source "arch/arm/mach-nomadik/Kconfig"
850 source "arch/arm/plat-nomadik/Kconfig"
852 source "arch/arm/mach-ns9xxx/Kconfig"
854 source "arch/arm/mach-nuc93x/Kconfig"
856 source "arch/arm/plat-omap/Kconfig"
858 source "arch/arm/mach-omap1/Kconfig"
860 source "arch/arm/mach-omap2/Kconfig"
862 source "arch/arm/mach-orion5x/Kconfig"
864 source "arch/arm/mach-pxa/Kconfig"
865 source "arch/arm/plat-pxa/Kconfig"
867 source "arch/arm/mach-mmp/Kconfig"
869 source "arch/arm/mach-realview/Kconfig"
871 source "arch/arm/mach-sa1100/Kconfig"
873 source "arch/arm/plat-samsung/Kconfig"
874 source "arch/arm/plat-s3c24xx/Kconfig"
875 source "arch/arm/plat-s5p/Kconfig"
877 source "arch/arm/plat-spear/Kconfig"
880 source "arch/arm/mach-s3c2400/Kconfig"
881 source "arch/arm/mach-s3c2410/Kconfig"
882 source "arch/arm/mach-s3c2412/Kconfig"
883 source "arch/arm/mach-s3c2416/Kconfig"
884 source "arch/arm/mach-s3c2440/Kconfig"
885 source "arch/arm/mach-s3c2443/Kconfig"
889 source "arch/arm/mach-s3c64xx/Kconfig"
892 source "arch/arm/mach-s5p6440/Kconfig"
894 source "arch/arm/mach-s5p6442/Kconfig"
896 source "arch/arm/mach-s5pc100/Kconfig"
898 source "arch/arm/mach-s5pv210/Kconfig"
900 source "arch/arm/mach-shmobile/Kconfig"
902 source "arch/arm/plat-stmp3xxx/Kconfig"
904 source "arch/arm/mach-u300/Kconfig"
906 source "arch/arm/mach-ux500/Kconfig"
908 source "arch/arm/mach-versatile/Kconfig"
910 source "arch/arm/mach-vexpress/Kconfig"
912 source "arch/arm/mach-w90x900/Kconfig"
914 # Definitions to make life easier
920 select GENERIC_CLOCKEVENTS
928 config PLAT_VERSATILE
931 config ARM_TIMER_SP804
934 source arch/arm/mm/Kconfig
937 bool "Enable iWMMXt support"
938 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
939 default y if PXA27x || PXA3xx || ARCH_MMP
941 Enable support for iWMMXt context switching at run time if
942 running on a CPU that supports it.
944 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
947 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
951 depends on (CPU_V6 || CPU_V7 || XSCALE_PMU) && \
952 (!ARCH_OMAP3 || OMAP3_EMU)
957 source "arch/arm/Kconfig-nommu"
960 config ARM_ERRATA_411920
961 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
962 depends on CPU_V6 && !SMP
964 Invalidation of the Instruction Cache operation can
965 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
966 It does not affect the MPCore. This option enables the ARM Ltd.
967 recommended workaround.
969 config ARM_ERRATA_430973
970 bool "ARM errata: Stale prediction on replaced interworking branch"
973 This option enables the workaround for the 430973 Cortex-A8
974 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
975 interworking branch is replaced with another code sequence at the
976 same virtual address, whether due to self-modifying code or virtual
977 to physical address re-mapping, Cortex-A8 does not recover from the
978 stale interworking branch prediction. This results in Cortex-A8
979 executing the new code sequence in the incorrect ARM or Thumb state.
980 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
981 and also flushes the branch target cache at every context switch.
982 Note that setting specific bits in the ACTLR register may not be
983 available in non-secure mode.
985 config ARM_ERRATA_458693
986 bool "ARM errata: Processor deadlock when a false hazard is created"
989 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
990 erratum. For very specific sequences of memory operations, it is
991 possible for a hazard condition intended for a cache line to instead
992 be incorrectly associated with a different cache line. This false
993 hazard might then cause a processor deadlock. The workaround enables
994 the L1 caching of the NEON accesses and disables the PLD instruction
995 in the ACTLR register. Note that setting specific bits in the ACTLR
996 register may not be available in non-secure mode.
998 config ARM_ERRATA_460075
999 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1002 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1003 erratum. Any asynchronous access to the L2 cache may encounter a
1004 situation in which recent store transactions to the L2 cache are lost
1005 and overwritten with stale memory contents from external memory. The
1006 workaround disables the write-allocate mode for the L2 cache via the
1007 ACTLR register. Note that setting specific bits in the ACTLR register
1008 may not be available in non-secure mode.
1010 config PL310_ERRATA_588369
1011 bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1012 depends on CACHE_L2X0 && ARCH_OMAP4
1014 The PL310 L2 cache controller implements three types of Clean &
1015 Invalidate maintenance operations: by Physical Address
1016 (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1017 They are architecturally defined to behave as the execution of a
1018 clean operation followed immediately by an invalidate operation,
1019 both performing to the same memory location. This functionality
1020 is not correctly implemented in PL310 as clean lines are not
1021 invalidated as a result of these operations. Note that this errata
1022 uses Texas Instrument's secure monitor api.
1025 source "arch/arm/common/Kconfig"
1027 config FORCE_MAX_ZONEORDER
1040 Find out whether you have ISA slots on your motherboard. ISA is the
1041 name of a bus system, i.e. the way the CPU talks to the other stuff
1042 inside your box. Other bus systems are PCI, EISA, MicroChannel
1043 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1044 newer boards don't support it. If you have ISA, say Y, otherwise N.
1046 # Select ISA DMA controller support
1051 # Select ISA DMA interface
1056 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
1058 Find out whether you have a PCI motherboard. PCI is the name of a
1059 bus system, i.e. the way the CPU talks to the other stuff inside
1060 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1061 VESA. If you have PCI, say Y, otherwise N.
1070 # Select the host bridge type
1071 config PCI_HOST_VIA82C505
1073 depends on PCI && ARCH_SHARK
1076 config PCI_HOST_ITE8152
1078 depends on PCI && MACH_ARMCORE
1082 source "drivers/pci/Kconfig"
1084 source "drivers/pcmcia/Kconfig"
1088 menu "Kernel Features"
1090 source "kernel/time/Kconfig"
1093 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1094 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1095 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
1096 ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1097 depends on GENERIC_CLOCKEVENTS
1098 select USE_GENERIC_SMP_HELPERS
1099 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1101 This enables support for systems with more than one CPU. If you have
1102 a system with only one CPU, like most personal computers, say N. If
1103 you have a system with more than one CPU, say Y.
1105 If you say N here, the kernel will run on single and multiprocessor
1106 machines, but will use only one CPU of a multiprocessor machine. If
1107 you say Y here, the kernel will run on many, but not all, single
1108 processor machines. On a single processor machine, the kernel will
1109 run faster if you say N here.
1111 See also <file:Documentation/i386/IO-APIC.txt>,
1112 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1113 <http://www.linuxdoc.org/docs.html#howto>.
1115 If you don't know what to do here, say N.
1121 This option enables support for the ARM system coherency unit
1127 This options enables support for the ARM timer and watchdog unit
1130 prompt "Memory split"
1133 Select the desired split between kernel and user memory.
1135 If you are not absolutely sure what you are doing, leave this
1139 bool "3G/1G user/kernel split"
1141 bool "2G/2G user/kernel split"
1143 bool "1G/3G user/kernel split"
1148 default 0x40000000 if VMSPLIT_1G
1149 default 0x80000000 if VMSPLIT_2G
1153 int "Maximum number of CPUs (2-32)"
1159 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1160 depends on SMP && HOTPLUG && EXPERIMENTAL
1162 Say Y here to experiment with turning CPUs off and on. CPUs
1163 can be controlled through /sys/devices/system/cpu.
1166 bool "Use local timer interrupts"
1167 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1168 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1170 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1172 Enable support for local timers on SMP platforms, rather then the
1173 legacy IPI broadcast method. Local timers allows the system
1174 accounting to be spread across the timer interval, preventing a
1175 "thundering herd" at every timer tick.
1177 source kernel/Kconfig.preempt
1181 default 128 if ARCH_L7200
1182 default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
1183 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1184 default AT91_TIMER_HZ if ARCH_AT91
1187 config THUMB2_KERNEL
1188 bool "Compile the kernel in Thumb-2 mode"
1189 depends on CPU_V7 && EXPERIMENTAL
1191 select ARM_ASM_UNIFIED
1193 By enabling this option, the kernel will be compiled in
1194 Thumb-2 mode. A compiler/assembler that understand the unified
1195 ARM-Thumb syntax is needed.
1199 config ARM_ASM_UNIFIED
1203 bool "Use the ARM EABI to compile the kernel"
1205 This option allows for the kernel to be compiled using the latest
1206 ARM ABI (aka EABI). This is only useful if you are using a user
1207 space environment that is also compiled with EABI.
1209 Since there are major incompatibilities between the legacy ABI and
1210 EABI, especially with regard to structure member alignment, this
1211 option also changes the kernel syscall calling convention to
1212 disambiguate both ABIs and allow for backward compatibility support
1213 (selected with CONFIG_OABI_COMPAT).
1215 To use this you need GCC version 4.0.0 or later.
1218 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1219 depends on AEABI && EXPERIMENTAL
1222 This option preserves the old syscall interface along with the
1223 new (ARM EABI) one. It also provides a compatibility layer to
1224 intercept syscalls that have structure arguments which layout
1225 in memory differs between the legacy ABI and the new ARM EABI
1226 (only for non "thumb" binaries). This option adds a tiny
1227 overhead to all syscalls and produces a slightly larger kernel.
1228 If you know you'll be using only pure EABI user space then you
1229 can say N here. If this option is not selected and you attempt
1230 to execute a legacy ABI binary then the result will be
1231 UNPREDICTABLE (in fact it can be predicted that it won't work
1232 at all). If in doubt say Y.
1234 config ARCH_HAS_HOLES_MEMORYMODEL
1237 # Discontigmem is deprecated
1238 config ARCH_DISCONTIGMEM_ENABLE
1241 config ARCH_SPARSEMEM_ENABLE
1244 config ARCH_SPARSEMEM_DEFAULT
1245 def_bool ARCH_SPARSEMEM_ENABLE
1247 config ARCH_SELECT_MEMORY_MODEL
1248 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1252 default "4" if ARCH_LH7A40X
1254 depends on NEED_MULTIPLE_NODES
1257 bool "High Memory Support (EXPERIMENTAL)"
1258 depends on MMU && EXPERIMENTAL
1260 The address space of ARM processors is only 4 Gigabytes large
1261 and it has to accommodate user address space, kernel address
1262 space as well as some memory mapped IO. That means that, if you
1263 have a large amount of physical memory and/or IO, not all of the
1264 memory can be "permanently mapped" by the kernel. The physical
1265 memory that is not permanently mapped is called "high memory".
1267 Depending on the selected kernel/user memory split, minimum
1268 vmalloc space and actual amount of RAM, you may not need this
1269 option which should result in a slightly faster kernel.
1274 bool "Allocate 2nd-level pagetables from highmem"
1276 depends on !OUTER_CACHE
1278 config HW_PERF_EVENTS
1279 bool "Enable hardware performance counter support for perf events"
1280 depends on PERF_EVENTS && CPU_HAS_PMU
1283 Enable hardware performance counter support for perf events. If
1284 disabled, perf events will use software events only.
1289 bool "Timer and CPU usage LEDs"
1290 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1291 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1292 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1293 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1294 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1295 ARCH_AT91 || ARCH_DAVINCI || \
1296 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1298 If you say Y here, the LEDs on your machine will be used
1299 to provide useful information about your current system status.
1301 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1302 be able to select which LEDs are active using the options below. If
1303 you are compiling a kernel for the EBSA-110 or the LART however, the
1304 red LED will simply flash regularly to indicate that the system is
1305 still functional. It is safe to say Y here if you have a CATS
1306 system, but the driver will do nothing.
1309 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1310 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1311 || MACH_OMAP_PERSEUS2
1313 depends on !GENERIC_CLOCKEVENTS
1314 default y if ARCH_EBSA110
1316 If you say Y here, one of the system LEDs (the green one on the
1317 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1318 will flash regularly to indicate that the system is still
1319 operational. This is mainly useful to kernel hackers who are
1320 debugging unstable kernels.
1322 The LART uses the same LED for both Timer LED and CPU usage LED
1323 functions. You may choose to use both, but the Timer LED function
1324 will overrule the CPU usage LED.
1327 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1329 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1330 || MACH_OMAP_PERSEUS2
1333 If you say Y here, the red LED will be used to give a good real
1334 time indication of CPU usage, by lighting whenever the idle task
1335 is not currently executing.
1337 The LART uses the same LED for both Timer LED and CPU usage LED
1338 functions. You may choose to use both, but the Timer LED function
1339 will overrule the CPU usage LED.
1341 config ALIGNMENT_TRAP
1343 depends on CPU_CP15_MMU
1344 default y if !ARCH_EBSA110
1345 select HAVE_PROC_CPU if PROC_FS
1347 ARM processors cannot fetch/store information which is not
1348 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1349 address divisible by 4. On 32-bit ARM processors, these non-aligned
1350 fetch/store instructions will be emulated in software if you say
1351 here, which has a severe performance impact. This is necessary for
1352 correct operation of some network protocols. With an IP-only
1353 configuration it is safe to say N, otherwise say Y.
1355 config UACCESS_WITH_MEMCPY
1356 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1357 depends on MMU && EXPERIMENTAL
1358 default y if CPU_FEROCEON
1360 Implement faster copy_to_user and clear_user methods for CPU
1361 cores where a 8-word STM instruction give significantly higher
1362 memory write throughput than a sequence of individual 32bit stores.
1364 A possible side effect is a slight increase in scheduling latency
1365 between threads sharing the same address space if they invoke
1366 such copy operations with large buffers.
1368 However, if the CPU data cache is using a write-allocate mode,
1369 this option is unlikely to provide any performance gain.
1375 # Compressed boot loader in ROM. Yes, we really want to ask about
1376 # TEXT and BSS so we preserve their values in the config files.
1377 config ZBOOT_ROM_TEXT
1378 hex "Compressed ROM boot loader base address"
1381 The physical address at which the ROM-able zImage is to be
1382 placed in the target. Platforms which normally make use of
1383 ROM-able zImage formats normally set this to a suitable
1384 value in their defconfig file.
1386 If ZBOOT_ROM is not enabled, this has no effect.
1388 config ZBOOT_ROM_BSS
1389 hex "Compressed ROM boot loader BSS address"
1392 The base address of an area of read/write memory in the target
1393 for the ROM-able zImage which must be available while the
1394 decompressor is running. It must be large enough to hold the
1395 entire decompressed kernel plus an additional 128 KiB.
1396 Platforms which normally make use of ROM-able zImage formats
1397 normally set this to a suitable value in their defconfig file.
1399 If ZBOOT_ROM is not enabled, this has no effect.
1402 bool "Compressed boot loader in ROM/flash"
1403 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1405 Say Y here if you intend to execute your compressed kernel image
1406 (zImage) directly from ROM or flash. If unsure, say N.
1409 string "Default kernel command string"
1412 On some architectures (EBSA110 and CATS), there is currently no way
1413 for the boot loader to pass arguments to the kernel. For these
1414 architectures, you should supply some command-line options at build
1415 time by entering them here. As a minimum, you should specify the
1416 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1418 config CMDLINE_FORCE
1419 bool "Always use the default kernel command string"
1420 depends on CMDLINE != ""
1422 Always use the default kernel command string, even if the boot
1423 loader passes other arguments to the kernel.
1424 This is useful if you cannot or don't want to change the
1425 command-line options your boot loader passes to the kernel.
1430 bool "Kernel Execute-In-Place from ROM"
1431 depends on !ZBOOT_ROM
1433 Execute-In-Place allows the kernel to run from non-volatile storage
1434 directly addressable by the CPU, such as NOR flash. This saves RAM
1435 space since the text section of the kernel is not loaded from flash
1436 to RAM. Read-write sections, such as the data section and stack,
1437 are still copied to RAM. The XIP kernel is not compressed since
1438 it has to run directly from flash, so it will take more space to
1439 store it. The flash address used to link the kernel object files,
1440 and for storing it, is configuration dependent. Therefore, if you
1441 say Y here, you must know the proper physical address where to
1442 store the kernel image depending on your own flash memory usage.
1444 Also note that the make target becomes "make xipImage" rather than
1445 "make zImage" or "make Image". The final kernel binary to put in
1446 ROM memory will be arch/arm/boot/xipImage.
1450 config XIP_PHYS_ADDR
1451 hex "XIP Kernel Physical Location"
1452 depends on XIP_KERNEL
1453 default "0x00080000"
1455 This is the physical address in your flash memory the kernel will
1456 be linked for and stored to. This address is dependent on your
1460 bool "Kexec system call (EXPERIMENTAL)"
1461 depends on EXPERIMENTAL
1463 kexec is a system call that implements the ability to shutdown your
1464 current kernel, and to start another kernel. It is like a reboot
1465 but it is independent of the system firmware. And like a reboot
1466 you can start any kernel with it, not just Linux.
1468 It is an ongoing process to be certain the hardware in a machine
1469 is properly shutdown, so do not be surprised if this code does not
1470 initially work for you. It may help to enable device hotplugging
1474 bool "Export atags in procfs"
1478 Should the atags used to boot the kernel be exported in an "atags"
1479 file in procfs. Useful with kexec.
1483 menu "CPU Power Management"
1487 source "drivers/cpufreq/Kconfig"
1489 config CPU_FREQ_SA1100
1492 config CPU_FREQ_SA1110
1495 config CPU_FREQ_INTEGRATOR
1496 tristate "CPUfreq driver for ARM Integrator CPUs"
1497 depends on ARCH_INTEGRATOR && CPU_FREQ
1500 This enables the CPUfreq driver for ARM Integrator CPUs.
1502 For details, take a look at <file:Documentation/cpu-freq>.
1508 depends on CPU_FREQ && ARCH_PXA && PXA25x
1510 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1512 config CPU_FREQ_S3C64XX
1513 bool "CPUfreq support for Samsung S3C64XX CPUs"
1514 depends on CPU_FREQ && CPU_S3C6410
1519 Internal configuration node for common cpufreq on Samsung SoC
1521 config CPU_FREQ_S3C24XX
1522 bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1523 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1526 This enables the CPUfreq driver for the Samsung S3C24XX family
1529 For details, take a look at <file:Documentation/cpu-freq>.
1533 config CPU_FREQ_S3C24XX_PLL
1534 bool "Support CPUfreq changing of PLL frequency"
1535 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1537 Compile in support for changing the PLL frequency from the
1538 S3C24XX series CPUfreq driver. The PLL takes time to settle
1539 after a frequency change, so by default it is not enabled.
1541 This also means that the PLL tables for the selected CPU(s) will
1542 be built which may increase the size of the kernel image.
1544 config CPU_FREQ_S3C24XX_DEBUG
1545 bool "Debug CPUfreq Samsung driver core"
1546 depends on CPU_FREQ_S3C24XX
1548 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1550 config CPU_FREQ_S3C24XX_IODEBUG
1551 bool "Debug CPUfreq Samsung driver IO timing"
1552 depends on CPU_FREQ_S3C24XX
1554 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1556 config CPU_FREQ_S3C24XX_DEBUGFS
1557 bool "Export debugfs for CPUFreq"
1558 depends on CPU_FREQ_S3C24XX && DEBUG_FS
1560 Export status information via debugfs.
1564 source "drivers/cpuidle/Kconfig"
1568 menu "Floating point emulation"
1570 comment "At least one emulation must be selected"
1573 bool "NWFPE math emulation"
1574 depends on !AEABI || OABI_COMPAT
1576 Say Y to include the NWFPE floating point emulator in the kernel.
1577 This is necessary to run most binaries. Linux does not currently
1578 support floating point hardware so you need to say Y here even if
1579 your machine has an FPA or floating point co-processor podule.
1581 You may say N here if you are going to load the Acorn FPEmulator
1582 early in the bootup.
1585 bool "Support extended precision"
1586 depends on FPE_NWFPE
1588 Say Y to include 80-bit support in the kernel floating-point
1589 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1590 Note that gcc does not generate 80-bit operations by default,
1591 so in most cases this option only enlarges the size of the
1592 floating point emulator without any good reason.
1594 You almost surely want to say N here.
1597 bool "FastFPE math emulation (EXPERIMENTAL)"
1598 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1600 Say Y here to include the FAST floating point emulator in the kernel.
1601 This is an experimental much faster emulator which now also has full
1602 precision for the mantissa. It does not support any exceptions.
1603 It is very simple, and approximately 3-6 times faster than NWFPE.
1605 It should be sufficient for most programs. It may be not suitable
1606 for scientific calculations, but you have to check this for yourself.
1607 If you do not feel you need a faster FP emulation you should better
1611 bool "VFP-format floating point maths"
1612 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1614 Say Y to include VFP support code in the kernel. This is needed
1615 if your hardware includes a VFP unit.
1617 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1618 release notes and additional status information.
1620 Say N if your target does not have VFP hardware.
1628 bool "Advanced SIMD (NEON) Extension support"
1629 depends on VFPv3 && CPU_V7
1631 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1636 menu "Userspace binary formats"
1638 source "fs/Kconfig.binfmt"
1641 tristate "RISC OS personality"
1644 Say Y here to include the kernel code necessary if you want to run
1645 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1646 experimental; if this sounds frightening, say N and sleep in peace.
1647 You can also say M here to compile this support as a module (which
1648 will be called arthur).
1652 menu "Power management options"
1654 source "kernel/power/Kconfig"
1656 config ARCH_SUSPEND_POSSIBLE
1661 source "net/Kconfig"
1663 source "drivers/Kconfig"
1667 source "arch/arm/Kconfig.debug"
1669 source "security/Kconfig"
1671 source "crypto/Kconfig"
1673 source "lib/Kconfig"