2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
6 mainmenu "Linux Kernel Configuration"
14 select SYS_SUPPORTS_APM_EMULATION
15 select GENERIC_ATOMIC64 if (!CPU_32v6K)
16 select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
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
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/>.
38 config SYS_SUPPORTS_APM_EMULATION
48 config ARCH_USES_GETTIMEOFFSET
52 config GENERIC_CLOCKEVENTS
55 config GENERIC_CLOCKEVENTS_BROADCAST
57 depends on GENERIC_CLOCKEVENTS
58 default y if SMP && !LOCAL_TIMERS
62 select GENERIC_ALLOCATOR
73 The Extended Industry Standard Architecture (EISA) bus was
74 developed as an open alternative to the IBM MicroChannel bus.
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.
81 Say Y here if you are building a kernel for an EISA-based machine.
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.
96 config GENERIC_HARDIRQS
100 config STACKTRACE_SUPPORT
104 config HAVE_LATENCYTOP_SUPPORT
109 config LOCKDEP_SUPPORT
113 config TRACE_IRQFLAGS_SUPPORT
117 config HARDIRQS_SW_RESEND
121 config GENERIC_IRQ_PROBE
125 config GENERIC_LOCKBREAK
128 depends on SMP && PREEMPT
130 config RWSEM_GENERIC_SPINLOCK
134 config RWSEM_XCHGADD_ALGORITHM
137 config ARCH_HAS_ILOG2_U32
140 config ARCH_HAS_ILOG2_U64
143 config ARCH_HAS_CPUFREQ
146 Internal node to signify that the ARCH has CPUFREQ support
147 and that the relevant menu configurations are displayed for
150 config GENERIC_HWEIGHT
154 config GENERIC_CALIBRATE_DELAY
158 config ARCH_MAY_HAVE_PC_FDC
164 config NEED_DMA_MAP_STATE
167 config GENERIC_ISA_DMA
176 config GENERIC_HARDIRQS_NO__DO_IRQ
179 config ARM_L1_CACHE_SHIFT_6
182 Setting ARM L1 cache line size to 64 Bytes.
186 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
187 default DRAM_BASE if REMAP_VECTORS_TO_RAM
190 The base address of exception vectors.
192 source "init/Kconfig"
194 source "kernel/Kconfig.freezer"
199 bool "MMU-based Paged Memory Management Support"
202 Select if you want MMU-based virtualised addressing space
203 support by paged memory management. If unsure, say 'Y'.
206 # The "ARM system type" choice list is ordered alphabetically by option
207 # text. Please add new entries in the option alphabetic order.
210 prompt "ARM system type"
211 default ARCH_VERSATILE
214 bool "Agilent AAEC-2000 based"
218 select ARCH_USES_GETTIMEOFFSET
220 This enables support for systems based on the Agilent AAEC-2000
222 config ARCH_INTEGRATOR
223 bool "ARM Ltd. Integrator family"
225 select ARCH_HAS_CPUFREQ
229 select GENERIC_CLOCKEVENTS
230 select PLAT_VERSATILE
232 Support for ARM's Integrator platform.
235 bool "ARM Ltd. RealView family"
240 select GENERIC_CLOCKEVENTS
241 select ARCH_WANT_OPTIONAL_GPIOLIB
242 select PLAT_VERSATILE
243 select ARM_TIMER_SP804
244 select GPIO_PL061 if GPIOLIB
246 This enables support for ARM Ltd RealView boards.
248 config ARCH_VERSATILE
249 bool "ARM Ltd. Versatile family"
255 select GENERIC_CLOCKEVENTS
256 select ARCH_WANT_OPTIONAL_GPIOLIB
257 select PLAT_VERSATILE
258 select ARM_TIMER_SP804
260 This enables support for ARM Ltd Versatile board.
263 bool "ARM Ltd. Versatile Express family"
264 select ARCH_WANT_OPTIONAL_GPIOLIB
266 select ARM_TIMER_SP804
268 select GENERIC_CLOCKEVENTS
272 select PLAT_VERSATILE
274 This enables support for the ARM Ltd Versatile Express boards.
278 select ARCH_REQUIRE_GPIOLIB
280 select ARCH_USES_GETTIMEOFFSET
282 This enables support for systems based on the Atmel AT91RM9200,
283 AT91SAM9 and AT91CAP9 processors.
286 bool "Broadcom BCMRING"
292 select GENERIC_CLOCKEVENTS
293 select ARCH_WANT_OPTIONAL_GPIOLIB
295 Support for Broadcom's BCMRing platform.
298 bool "Cirrus Logic CLPS711x/EP721x-based"
300 select ARCH_USES_GETTIMEOFFSET
302 Support for Cirrus Logic 711x/721x based boards.
305 bool "Cavium Networks CNS3XXX family"
308 select GENERIC_CLOCKEVENTS
311 Support for Cavium Networks CNS3XXX platform.
314 bool "Cortina Systems Gemini"
316 select ARCH_REQUIRE_GPIOLIB
317 select ARCH_USES_GETTIMEOFFSET
319 Support for the Cortina Systems Gemini family SoCs
326 select ARCH_USES_GETTIMEOFFSET
328 This is an evaluation board for the StrongARM processor available
329 from Digital. It has limited hardware on-board, including an
330 Ethernet interface, two PCMCIA sockets, two serial ports and a
339 select ARCH_REQUIRE_GPIOLIB
340 select ARCH_HAS_HOLES_MEMORYMODEL
341 select ARCH_USES_GETTIMEOFFSET
343 This enables support for the Cirrus EP93xx series of CPUs.
345 config ARCH_FOOTBRIDGE
349 select ARCH_USES_GETTIMEOFFSET
351 Support for systems based on the DC21285 companion chip
352 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
355 bool "Freescale MXC/iMX-based"
357 select GENERIC_CLOCKEVENTS
358 select ARCH_REQUIRE_GPIOLIB
361 Support for Freescale MXC/iMX-based family of processors
364 bool "Freescale STMP3xxx"
367 select ARCH_REQUIRE_GPIOLIB
369 select GENERIC_CLOCKEVENTS
370 select USB_ARCH_HAS_EHCI
372 Support for systems based on the Freescale 3xxx CPUs.
375 bool "Hilscher NetX based"
378 select GENERIC_CLOCKEVENTS
381 This enables support for systems based on the Hilscher NetX Soc
384 bool "Hynix HMS720x-based"
387 select ARCH_USES_GETTIMEOFFSET
389 This enables support for systems based on the Hynix HMS720x
397 select ARCH_SUPPORTS_MSI
400 Support for Intel's IOP13XX (XScale) family of processors.
408 select ARCH_REQUIRE_GPIOLIB
410 Support for Intel's 80219 and IOP32X (XScale) family of
419 select ARCH_REQUIRE_GPIOLIB
421 Support for Intel's IOP33X (XScale) family of processors.
428 select ARCH_USES_GETTIMEOFFSET
430 Support for Intel's IXP23xx (XScale) family of processors.
433 bool "IXP2400/2800-based"
437 select ARCH_USES_GETTIMEOFFSET
439 Support for Intel's IXP2400/2800 (XScale) family of processors.
447 select GENERIC_CLOCKEVENTS
448 select DMABOUNCE if PCI
450 Support for Intel's IXP4XX (XScale) family of processors.
456 select ARCH_USES_GETTIMEOFFSET
458 Say Y here if you intend to run this kernel on a LinkUp Systems
459 L7200 Software Development Board which uses an ARM720T processor.
460 Information on this board can be obtained at:
462 <http://www.linkupsys.com/>
464 If you have any questions or comments about the Linux kernel port
465 to this board, send e-mail to <sjhill@cotw.com>.
470 select ARCH_REQUIRE_GPIOLIB
472 select GENERIC_CLOCKEVENTS
475 Support for the Marvell Dove SoC 88AP510
478 bool "Marvell Kirkwood"
481 select ARCH_REQUIRE_GPIOLIB
483 select GENERIC_CLOCKEVENTS
486 Support for the following Marvell Kirkwood series SoCs:
487 88F6180, 88F6192 and 88F6281.
490 bool "Marvell Loki (88RC8480)"
493 select GENERIC_CLOCKEVENTS
496 Support for the Marvell Loki (88RC8480) SoC.
499 bool "Marvell MV78xx0"
502 select ARCH_REQUIRE_GPIOLIB
504 select GENERIC_CLOCKEVENTS
507 Support for the following Marvell MV78xx0 series SoCs:
515 select ARCH_REQUIRE_GPIOLIB
517 select GENERIC_CLOCKEVENTS
520 Support for the following Marvell Orion 5x series SoCs:
521 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
522 Orion-2 (5281), Orion-1-90 (6183).
525 bool "Marvell PXA168/910/MMP2"
527 select ARCH_REQUIRE_GPIOLIB
530 select GENERIC_CLOCKEVENTS
534 Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
537 bool "Micrel/Kendin KS8695"
539 select ARCH_REQUIRE_GPIOLIB
540 select ARCH_USES_GETTIMEOFFSET
542 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
543 System-on-Chip devices.
546 bool "NetSilicon NS9xxx"
550 select GENERIC_CLOCKEVENTS
553 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
556 <http://www.digi.com/products/microprocessors/index.jsp>
559 bool "Nuvoton W90X900 CPU"
561 select ARCH_REQUIRE_GPIOLIB
564 select GENERIC_CLOCKEVENTS
566 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
567 At present, the w90x900 has been renamed nuc900, regarding
568 the ARM series product line, you can login the following
569 link address to know more.
571 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
572 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
575 bool "Nuvoton NUC93X CPU"
579 Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
580 low-power and high performance MPEG-4/JPEG multimedia controller chip.
583 bool "Philips Nexperia PNX4008 Mobile"
586 select ARCH_USES_GETTIMEOFFSET
588 This enables support for Philips PNX4008 mobile platform.
591 bool "PXA2xx/PXA3xx-based"
594 select ARCH_HAS_CPUFREQ
596 select ARCH_REQUIRE_GPIOLIB
598 select GENERIC_CLOCKEVENTS
602 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
608 select GENERIC_CLOCKEVENTS
610 Support for Qualcomm MSM/QSD based systems. This runs on the
611 apps processor of the MSM/QSD and depends on a shared memory
612 interface to the modem processor which runs the baseband
613 stack and controls some vital subsystems
614 (clock and power control, etc).
617 bool "Renesas SH-Mobile"
619 Support for Renesas's SH-Mobile ARM platforms
626 select ARCH_MAY_HAVE_PC_FDC
627 select HAVE_PATA_PLATFORM
630 select ARCH_SPARSEMEM_ENABLE
631 select ARCH_USES_GETTIMEOFFSET
633 On the Acorn Risc-PC, Linux can support the internal IDE disk and
634 CD-ROM interface, serial and parallel port, and the floppy drive.
640 select ARCH_SPARSEMEM_ENABLE
642 select ARCH_HAS_CPUFREQ
645 select GENERIC_CLOCKEVENTS
648 select ARCH_REQUIRE_GPIOLIB
650 Support for StrongARM 11x0 based boards.
653 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
655 select ARCH_HAS_CPUFREQ
657 select ARCH_USES_GETTIMEOFFSET
659 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
660 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
661 the Samsung SMDK2410 development board (and derivatives).
663 Note, the S3C2416 and the S3C2450 are so close that they even share
664 the same SoC ID code. This means that there is no seperate machine
665 directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
668 bool "Samsung S3C64XX"
674 select ARCH_USES_GETTIMEOFFSET
675 select ARCH_HAS_CPUFREQ
676 select ARCH_REQUIRE_GPIOLIB
677 select SAMSUNG_CLKSRC
678 select SAMSUNG_IRQ_VIC_TIMER
679 select SAMSUNG_IRQ_UART
680 select S3C_GPIO_TRACK
681 select S3C_GPIO_PULL_UPDOWN
682 select S3C_GPIO_CFG_S3C24XX
683 select S3C_GPIO_CFG_S3C64XX
685 select USB_ARCH_HAS_OHCI
686 select SAMSUNG_GPIOLIB_4BIT
688 Samsung S3C64XX series based systems
691 bool "Samsung S5P6440"
696 Samsung S5P6440 CPU based systems
699 bool "Samsung S5P6442"
704 Samsung S5P6442 CPU based systems
707 bool "Samsung S5PC1XX"
711 select ARM_L1_CACHE_SHIFT_6
713 Samsung S5PC1XX series based systems
716 bool "Samsung S5PV210/S5PC110"
720 select ARM_L1_CACHE_SHIFT_6
722 Samsung S5PV210/S5PC110 series based systems
731 select ARCH_USES_GETTIMEOFFSET
733 Support for the StrongARM based Digital DNARD machine, also known
734 as "Shark" (<http://www.shark-linux.de/shark.html>).
739 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
740 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
741 select ARCH_USES_GETTIMEOFFSET
743 Say Y here for systems based on one of the Sharp LH7A40X
744 System on a Chip processors. These CPUs include an ARM922T
745 core with a wide array of integrated devices for
746 hand-held and low-power applications.
749 bool "ST-Ericsson U300 Series"
756 select GENERIC_CLOCKEVENTS
760 Support for ST-Ericsson U300 series mobile platforms.
763 bool "ST-Ericsson U8500 Series"
767 select GENERIC_CLOCKEVENTS
769 select ARCH_REQUIRE_GPIOLIB
771 Support for ST-Ericsson's Ux500 architecture
774 bool "STMicroelectronics Nomadik"
780 select GENERIC_CLOCKEVENTS
781 select ARCH_REQUIRE_GPIOLIB
783 Support for the Nomadik platform by ST-Ericsson
789 select GENERIC_CLOCKEVENTS
790 select ARCH_REQUIRE_GPIOLIB
794 select GENERIC_ALLOCATOR
795 select ARCH_HAS_HOLES_MEMORYMODEL
797 Support for TI's DaVinci platform.
802 select ARCH_REQUIRE_GPIOLIB
803 select ARCH_HAS_CPUFREQ
805 select GENERIC_CLOCKEVENTS
806 select ARCH_HAS_HOLES_MEMORYMODEL
808 Support for TI's OMAP platform (OMAP1 and OMAP2).
813 select ARCH_REQUIRE_GPIOLIB
815 select GENERIC_CLOCKEVENTS
819 Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
824 # This is sorted alphabetically by mach-* pathname. However, plat-*
825 # Kconfigs may be included either alphabetically (according to the
826 # plat- suffix) or along side the corresponding mach-* source.
828 source "arch/arm/mach-aaec2000/Kconfig"
830 source "arch/arm/mach-at91/Kconfig"
832 source "arch/arm/mach-bcmring/Kconfig"
834 source "arch/arm/mach-clps711x/Kconfig"
836 source "arch/arm/mach-cns3xxx/Kconfig"
838 source "arch/arm/mach-davinci/Kconfig"
840 source "arch/arm/mach-dove/Kconfig"
842 source "arch/arm/mach-ep93xx/Kconfig"
844 source "arch/arm/mach-footbridge/Kconfig"
846 source "arch/arm/mach-gemini/Kconfig"
848 source "arch/arm/mach-h720x/Kconfig"
850 source "arch/arm/mach-integrator/Kconfig"
852 source "arch/arm/mach-iop32x/Kconfig"
854 source "arch/arm/mach-iop33x/Kconfig"
856 source "arch/arm/mach-iop13xx/Kconfig"
858 source "arch/arm/mach-ixp4xx/Kconfig"
860 source "arch/arm/mach-ixp2000/Kconfig"
862 source "arch/arm/mach-ixp23xx/Kconfig"
864 source "arch/arm/mach-kirkwood/Kconfig"
866 source "arch/arm/mach-ks8695/Kconfig"
868 source "arch/arm/mach-lh7a40x/Kconfig"
870 source "arch/arm/mach-loki/Kconfig"
872 source "arch/arm/mach-msm/Kconfig"
874 source "arch/arm/mach-mv78xx0/Kconfig"
876 source "arch/arm/plat-mxc/Kconfig"
878 source "arch/arm/mach-netx/Kconfig"
880 source "arch/arm/mach-nomadik/Kconfig"
881 source "arch/arm/plat-nomadik/Kconfig"
883 source "arch/arm/mach-ns9xxx/Kconfig"
885 source "arch/arm/mach-nuc93x/Kconfig"
887 source "arch/arm/plat-omap/Kconfig"
889 source "arch/arm/mach-omap1/Kconfig"
891 source "arch/arm/mach-omap2/Kconfig"
893 source "arch/arm/mach-orion5x/Kconfig"
895 source "arch/arm/mach-pxa/Kconfig"
896 source "arch/arm/plat-pxa/Kconfig"
898 source "arch/arm/mach-mmp/Kconfig"
900 source "arch/arm/mach-realview/Kconfig"
902 source "arch/arm/mach-sa1100/Kconfig"
904 source "arch/arm/plat-samsung/Kconfig"
905 source "arch/arm/plat-s3c24xx/Kconfig"
906 source "arch/arm/plat-s5p/Kconfig"
907 source "arch/arm/plat-s5pc1xx/Kconfig"
908 source "arch/arm/plat-spear/Kconfig"
911 source "arch/arm/mach-s3c2400/Kconfig"
912 source "arch/arm/mach-s3c2410/Kconfig"
913 source "arch/arm/mach-s3c2412/Kconfig"
914 source "arch/arm/mach-s3c2416/Kconfig"
915 source "arch/arm/mach-s3c2440/Kconfig"
916 source "arch/arm/mach-s3c2443/Kconfig"
920 source "arch/arm/mach-s3c64xx/Kconfig"
923 source "arch/arm/mach-s5p6440/Kconfig"
925 source "arch/arm/mach-s5p6442/Kconfig"
928 source "arch/arm/mach-s5pc100/Kconfig"
931 source "arch/arm/mach-s5pv210/Kconfig"
933 source "arch/arm/mach-shmobile/Kconfig"
935 source "arch/arm/plat-stmp3xxx/Kconfig"
937 source "arch/arm/mach-u300/Kconfig"
939 source "arch/arm/mach-ux500/Kconfig"
941 source "arch/arm/mach-versatile/Kconfig"
943 source "arch/arm/mach-vexpress/Kconfig"
945 source "arch/arm/mach-w90x900/Kconfig"
947 # Definitions to make life easier
953 select GENERIC_CLOCKEVENTS
962 config PLAT_VERSATILE
965 config ARM_TIMER_SP804
968 source arch/arm/mm/Kconfig
971 bool "Enable iWMMXt support"
972 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
973 default y if PXA27x || PXA3xx || ARCH_MMP
975 Enable support for iWMMXt context switching at run time if
976 running on a CPU that supports it.
978 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
981 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
985 depends on CPU_V6 || CPU_V7 || XSCALE_PMU
990 source "arch/arm/Kconfig-nommu"
993 config ARM_ERRATA_411920
994 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
995 depends on CPU_V6 && !SMP
997 Invalidation of the Instruction Cache operation can
998 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
999 It does not affect the MPCore. This option enables the ARM Ltd.
1000 recommended workaround.
1002 config ARM_ERRATA_430973
1003 bool "ARM errata: Stale prediction on replaced interworking branch"
1006 This option enables the workaround for the 430973 Cortex-A8
1007 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1008 interworking branch is replaced with another code sequence at the
1009 same virtual address, whether due to self-modifying code or virtual
1010 to physical address re-mapping, Cortex-A8 does not recover from the
1011 stale interworking branch prediction. This results in Cortex-A8
1012 executing the new code sequence in the incorrect ARM or Thumb state.
1013 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1014 and also flushes the branch target cache at every context switch.
1015 Note that setting specific bits in the ACTLR register may not be
1016 available in non-secure mode.
1018 config ARM_ERRATA_458693
1019 bool "ARM errata: Processor deadlock when a false hazard is created"
1022 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1023 erratum. For very specific sequences of memory operations, it is
1024 possible for a hazard condition intended for a cache line to instead
1025 be incorrectly associated with a different cache line. This false
1026 hazard might then cause a processor deadlock. The workaround enables
1027 the L1 caching of the NEON accesses and disables the PLD instruction
1028 in the ACTLR register. Note that setting specific bits in the ACTLR
1029 register may not be available in non-secure mode.
1031 config ARM_ERRATA_460075
1032 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1035 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1036 erratum. Any asynchronous access to the L2 cache may encounter a
1037 situation in which recent store transactions to the L2 cache are lost
1038 and overwritten with stale memory contents from external memory. The
1039 workaround disables the write-allocate mode for the L2 cache via the
1040 ACTLR register. Note that setting specific bits in the ACTLR register
1041 may not be available in non-secure mode.
1043 config PL310_ERRATA_588369
1044 bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1045 depends on CACHE_L2X0 && ARCH_OMAP4
1047 The PL310 L2 cache controller implements three types of Clean &
1048 Invalidate maintenance operations: by Physical Address
1049 (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1050 They are architecturally defined to behave as the execution of a
1051 clean operation followed immediately by an invalidate operation,
1052 both performing to the same memory location. This functionality
1053 is not correctly implemented in PL310 as clean lines are not
1054 invalidated as a result of these operations. Note that this errata
1055 uses Texas Instrument's secure monitor api.
1058 source "arch/arm/common/Kconfig"
1060 config FORCE_MAX_ZONEORDER
1073 Find out whether you have ISA slots on your motherboard. ISA is the
1074 name of a bus system, i.e. the way the CPU talks to the other stuff
1075 inside your box. Other bus systems are PCI, EISA, MicroChannel
1076 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1077 newer boards don't support it. If you have ISA, say Y, otherwise N.
1079 # Select ISA DMA controller support
1084 # Select ISA DMA interface
1089 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
1091 Find out whether you have a PCI motherboard. PCI is the name of a
1092 bus system, i.e. the way the CPU talks to the other stuff inside
1093 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1094 VESA. If you have PCI, say Y, otherwise N.
1103 # Select the host bridge type
1104 config PCI_HOST_VIA82C505
1106 depends on PCI && ARCH_SHARK
1109 config PCI_HOST_ITE8152
1111 depends on PCI && MACH_ARMCORE
1115 source "drivers/pci/Kconfig"
1117 source "drivers/pcmcia/Kconfig"
1121 menu "Kernel Features"
1123 source "kernel/time/Kconfig"
1126 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1127 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1128 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
1129 ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1130 depends on GENERIC_CLOCKEVENTS
1131 select USE_GENERIC_SMP_HELPERS
1132 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1134 This enables support for systems with more than one CPU. If you have
1135 a system with only one CPU, like most personal computers, say N. If
1136 you have a system with more than one CPU, say Y.
1138 If you say N here, the kernel will run on single and multiprocessor
1139 machines, but will use only one CPU of a multiprocessor machine. If
1140 you say Y here, the kernel will run on many, but not all, single
1141 processor machines. On a single processor machine, the kernel will
1142 run faster if you say N here.
1144 See also <file:Documentation/i386/IO-APIC.txt>,
1145 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1146 <http://www.linuxdoc.org/docs.html#howto>.
1148 If you don't know what to do here, say N.
1154 This option enables support for the ARM system coherency unit
1160 This options enables support for the ARM timer and watchdog unit
1163 prompt "Memory split"
1166 Select the desired split between kernel and user memory.
1168 If you are not absolutely sure what you are doing, leave this
1172 bool "3G/1G user/kernel split"
1174 bool "2G/2G user/kernel split"
1176 bool "1G/3G user/kernel split"
1181 default 0x40000000 if VMSPLIT_1G
1182 default 0x80000000 if VMSPLIT_2G
1186 int "Maximum number of CPUs (2-32)"
1192 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1193 depends on SMP && HOTPLUG && EXPERIMENTAL
1195 Say Y here to experiment with turning CPUs off and on. CPUs
1196 can be controlled through /sys/devices/system/cpu.
1199 bool "Use local timer interrupts"
1200 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1201 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1203 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1205 Enable support for local timers on SMP platforms, rather then the
1206 legacy IPI broadcast method. Local timers allows the system
1207 accounting to be spread across the timer interval, preventing a
1208 "thundering herd" at every timer tick.
1210 source kernel/Kconfig.preempt
1214 default 128 if ARCH_L7200
1215 default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
1216 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1217 default AT91_TIMER_HZ if ARCH_AT91
1220 config THUMB2_KERNEL
1221 bool "Compile the kernel in Thumb-2 mode"
1222 depends on CPU_V7 && EXPERIMENTAL
1224 select ARM_ASM_UNIFIED
1226 By enabling this option, the kernel will be compiled in
1227 Thumb-2 mode. A compiler/assembler that understand the unified
1228 ARM-Thumb syntax is needed.
1232 config ARM_ASM_UNIFIED
1236 bool "Use the ARM EABI to compile the kernel"
1238 This option allows for the kernel to be compiled using the latest
1239 ARM ABI (aka EABI). This is only useful if you are using a user
1240 space environment that is also compiled with EABI.
1242 Since there are major incompatibilities between the legacy ABI and
1243 EABI, especially with regard to structure member alignment, this
1244 option also changes the kernel syscall calling convention to
1245 disambiguate both ABIs and allow for backward compatibility support
1246 (selected with CONFIG_OABI_COMPAT).
1248 To use this you need GCC version 4.0.0 or later.
1251 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1252 depends on AEABI && EXPERIMENTAL
1255 This option preserves the old syscall interface along with the
1256 new (ARM EABI) one. It also provides a compatibility layer to
1257 intercept syscalls that have structure arguments which layout
1258 in memory differs between the legacy ABI and the new ARM EABI
1259 (only for non "thumb" binaries). This option adds a tiny
1260 overhead to all syscalls and produces a slightly larger kernel.
1261 If you know you'll be using only pure EABI user space then you
1262 can say N here. If this option is not selected and you attempt
1263 to execute a legacy ABI binary then the result will be
1264 UNPREDICTABLE (in fact it can be predicted that it won't work
1265 at all). If in doubt say Y.
1267 config ARCH_HAS_HOLES_MEMORYMODEL
1270 # Discontigmem is deprecated
1271 config ARCH_DISCONTIGMEM_ENABLE
1274 config ARCH_SPARSEMEM_ENABLE
1277 config ARCH_SPARSEMEM_DEFAULT
1278 def_bool ARCH_SPARSEMEM_ENABLE
1280 config ARCH_SELECT_MEMORY_MODEL
1281 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1285 default "4" if ARCH_LH7A40X
1287 depends on NEED_MULTIPLE_NODES
1290 bool "High Memory Support (EXPERIMENTAL)"
1291 depends on MMU && EXPERIMENTAL
1293 The address space of ARM processors is only 4 Gigabytes large
1294 and it has to accommodate user address space, kernel address
1295 space as well as some memory mapped IO. That means that, if you
1296 have a large amount of physical memory and/or IO, not all of the
1297 memory can be "permanently mapped" by the kernel. The physical
1298 memory that is not permanently mapped is called "high memory".
1300 Depending on the selected kernel/user memory split, minimum
1301 vmalloc space and actual amount of RAM, you may not need this
1302 option which should result in a slightly faster kernel.
1307 bool "Allocate 2nd-level pagetables from highmem"
1309 depends on !OUTER_CACHE
1311 config HW_PERF_EVENTS
1312 bool "Enable hardware performance counter support for perf events"
1313 depends on PERF_EVENTS && CPU_HAS_PMU
1316 Enable hardware performance counter support for perf events. If
1317 disabled, perf events will use software events only.
1322 bool "Timer and CPU usage LEDs"
1323 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1324 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1325 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1326 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1327 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1328 ARCH_AT91 || ARCH_DAVINCI || \
1329 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1331 If you say Y here, the LEDs on your machine will be used
1332 to provide useful information about your current system status.
1334 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1335 be able to select which LEDs are active using the options below. If
1336 you are compiling a kernel for the EBSA-110 or the LART however, the
1337 red LED will simply flash regularly to indicate that the system is
1338 still functional. It is safe to say Y here if you have a CATS
1339 system, but the driver will do nothing.
1342 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1343 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1344 || MACH_OMAP_PERSEUS2
1346 depends on !GENERIC_CLOCKEVENTS
1347 default y if ARCH_EBSA110
1349 If you say Y here, one of the system LEDs (the green one on the
1350 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1351 will flash regularly to indicate that the system is still
1352 operational. This is mainly useful to kernel hackers who are
1353 debugging unstable kernels.
1355 The LART uses the same LED for both Timer LED and CPU usage LED
1356 functions. You may choose to use both, but the Timer LED function
1357 will overrule the CPU usage LED.
1360 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1362 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1363 || MACH_OMAP_PERSEUS2
1366 If you say Y here, the red LED will be used to give a good real
1367 time indication of CPU usage, by lighting whenever the idle task
1368 is not currently executing.
1370 The LART uses the same LED for both Timer LED and CPU usage LED
1371 functions. You may choose to use both, but the Timer LED function
1372 will overrule the CPU usage LED.
1374 config ALIGNMENT_TRAP
1376 depends on CPU_CP15_MMU
1377 default y if !ARCH_EBSA110
1378 select HAVE_PROC_CPU if PROC_FS
1380 ARM processors cannot fetch/store information which is not
1381 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1382 address divisible by 4. On 32-bit ARM processors, these non-aligned
1383 fetch/store instructions will be emulated in software if you say
1384 here, which has a severe performance impact. This is necessary for
1385 correct operation of some network protocols. With an IP-only
1386 configuration it is safe to say N, otherwise say Y.
1388 config UACCESS_WITH_MEMCPY
1389 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1390 depends on MMU && EXPERIMENTAL
1391 default y if CPU_FEROCEON
1393 Implement faster copy_to_user and clear_user methods for CPU
1394 cores where a 8-word STM instruction give significantly higher
1395 memory write throughput than a sequence of individual 32bit stores.
1397 A possible side effect is a slight increase in scheduling latency
1398 between threads sharing the same address space if they invoke
1399 such copy operations with large buffers.
1401 However, if the CPU data cache is using a write-allocate mode,
1402 this option is unlikely to provide any performance gain.
1408 # Compressed boot loader in ROM. Yes, we really want to ask about
1409 # TEXT and BSS so we preserve their values in the config files.
1410 config ZBOOT_ROM_TEXT
1411 hex "Compressed ROM boot loader base address"
1414 The physical address at which the ROM-able zImage is to be
1415 placed in the target. Platforms which normally make use of
1416 ROM-able zImage formats normally set this to a suitable
1417 value in their defconfig file.
1419 If ZBOOT_ROM is not enabled, this has no effect.
1421 config ZBOOT_ROM_BSS
1422 hex "Compressed ROM boot loader BSS address"
1425 The base address of an area of read/write memory in the target
1426 for the ROM-able zImage which must be available while the
1427 decompressor is running. It must be large enough to hold the
1428 entire decompressed kernel plus an additional 128 KiB.
1429 Platforms which normally make use of ROM-able zImage formats
1430 normally set this to a suitable value in their defconfig file.
1432 If ZBOOT_ROM is not enabled, this has no effect.
1435 bool "Compressed boot loader in ROM/flash"
1436 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1438 Say Y here if you intend to execute your compressed kernel image
1439 (zImage) directly from ROM or flash. If unsure, say N.
1442 string "Default kernel command string"
1445 On some architectures (EBSA110 and CATS), there is currently no way
1446 for the boot loader to pass arguments to the kernel. For these
1447 architectures, you should supply some command-line options at build
1448 time by entering them here. As a minimum, you should specify the
1449 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1452 bool "Kernel Execute-In-Place from ROM"
1453 depends on !ZBOOT_ROM
1455 Execute-In-Place allows the kernel to run from non-volatile storage
1456 directly addressable by the CPU, such as NOR flash. This saves RAM
1457 space since the text section of the kernel is not loaded from flash
1458 to RAM. Read-write sections, such as the data section and stack,
1459 are still copied to RAM. The XIP kernel is not compressed since
1460 it has to run directly from flash, so it will take more space to
1461 store it. The flash address used to link the kernel object files,
1462 and for storing it, is configuration dependent. Therefore, if you
1463 say Y here, you must know the proper physical address where to
1464 store the kernel image depending on your own flash memory usage.
1466 Also note that the make target becomes "make xipImage" rather than
1467 "make zImage" or "make Image". The final kernel binary to put in
1468 ROM memory will be arch/arm/boot/xipImage.
1472 config XIP_PHYS_ADDR
1473 hex "XIP Kernel Physical Location"
1474 depends on XIP_KERNEL
1475 default "0x00080000"
1477 This is the physical address in your flash memory the kernel will
1478 be linked for and stored to. This address is dependent on your
1482 bool "Kexec system call (EXPERIMENTAL)"
1483 depends on EXPERIMENTAL
1485 kexec is a system call that implements the ability to shutdown your
1486 current kernel, and to start another kernel. It is like a reboot
1487 but it is independent of the system firmware. And like a reboot
1488 you can start any kernel with it, not just Linux.
1490 It is an ongoing process to be certain the hardware in a machine
1491 is properly shutdown, so do not be surprised if this code does not
1492 initially work for you. It may help to enable device hotplugging
1496 bool "Export atags in procfs"
1500 Should the atags used to boot the kernel be exported in an "atags"
1501 file in procfs. Useful with kexec.
1505 menu "CPU Power Management"
1509 source "drivers/cpufreq/Kconfig"
1511 config CPU_FREQ_SA1100
1514 config CPU_FREQ_SA1110
1517 config CPU_FREQ_INTEGRATOR
1518 tristate "CPUfreq driver for ARM Integrator CPUs"
1519 depends on ARCH_INTEGRATOR && CPU_FREQ
1522 This enables the CPUfreq driver for ARM Integrator CPUs.
1524 For details, take a look at <file:Documentation/cpu-freq>.
1530 depends on CPU_FREQ && ARCH_PXA && PXA25x
1532 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1534 config CPU_FREQ_S3C64XX
1535 bool "CPUfreq support for Samsung S3C64XX CPUs"
1536 depends on CPU_FREQ && CPU_S3C6410
1541 Internal configuration node for common cpufreq on Samsung SoC
1543 config CPU_FREQ_S3C24XX
1544 bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1545 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1548 This enables the CPUfreq driver for the Samsung S3C24XX family
1551 For details, take a look at <file:Documentation/cpu-freq>.
1555 config CPU_FREQ_S3C24XX_PLL
1556 bool "Support CPUfreq changing of PLL frequency"
1557 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1559 Compile in support for changing the PLL frequency from the
1560 S3C24XX series CPUfreq driver. The PLL takes time to settle
1561 after a frequency change, so by default it is not enabled.
1563 This also means that the PLL tables for the selected CPU(s) will
1564 be built which may increase the size of the kernel image.
1566 config CPU_FREQ_S3C24XX_DEBUG
1567 bool "Debug CPUfreq Samsung driver core"
1568 depends on CPU_FREQ_S3C24XX
1570 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1572 config CPU_FREQ_S3C24XX_IODEBUG
1573 bool "Debug CPUfreq Samsung driver IO timing"
1574 depends on CPU_FREQ_S3C24XX
1576 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1578 config CPU_FREQ_S3C24XX_DEBUGFS
1579 bool "Export debugfs for CPUFreq"
1580 depends on CPU_FREQ_S3C24XX && DEBUG_FS
1582 Export status information via debugfs.
1586 source "drivers/cpuidle/Kconfig"
1590 menu "Floating point emulation"
1592 comment "At least one emulation must be selected"
1595 bool "NWFPE math emulation"
1596 depends on !AEABI || OABI_COMPAT
1598 Say Y to include the NWFPE floating point emulator in the kernel.
1599 This is necessary to run most binaries. Linux does not currently
1600 support floating point hardware so you need to say Y here even if
1601 your machine has an FPA or floating point co-processor podule.
1603 You may say N here if you are going to load the Acorn FPEmulator
1604 early in the bootup.
1607 bool "Support extended precision"
1608 depends on FPE_NWFPE
1610 Say Y to include 80-bit support in the kernel floating-point
1611 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1612 Note that gcc does not generate 80-bit operations by default,
1613 so in most cases this option only enlarges the size of the
1614 floating point emulator without any good reason.
1616 You almost surely want to say N here.
1619 bool "FastFPE math emulation (EXPERIMENTAL)"
1620 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1622 Say Y here to include the FAST floating point emulator in the kernel.
1623 This is an experimental much faster emulator which now also has full
1624 precision for the mantissa. It does not support any exceptions.
1625 It is very simple, and approximately 3-6 times faster than NWFPE.
1627 It should be sufficient for most programs. It may be not suitable
1628 for scientific calculations, but you have to check this for yourself.
1629 If you do not feel you need a faster FP emulation you should better
1633 bool "VFP-format floating point maths"
1634 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1636 Say Y to include VFP support code in the kernel. This is needed
1637 if your hardware includes a VFP unit.
1639 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1640 release notes and additional status information.
1642 Say N if your target does not have VFP hardware.
1650 bool "Advanced SIMD (NEON) Extension support"
1651 depends on VFPv3 && CPU_V7
1653 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1658 menu "Userspace binary formats"
1660 source "fs/Kconfig.binfmt"
1663 tristate "RISC OS personality"
1666 Say Y here to include the kernel code necessary if you want to run
1667 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1668 experimental; if this sounds frightening, say N and sleep in peace.
1669 You can also say M here to compile this support as a module (which
1670 will be called arthur).
1674 menu "Power management options"
1676 source "kernel/power/Kconfig"
1678 config ARCH_SUSPEND_POSSIBLE
1683 source "net/Kconfig"
1685 source "drivers/Kconfig"
1689 source "arch/arm/Kconfig.debug"
1691 source "security/Kconfig"
1693 source "crypto/Kconfig"
1695 source "lib/Kconfig"