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
17 select HAVE_KPROBES if (!XIP_KERNEL)
18 select HAVE_KRETPROBES if (HAVE_KPROBES)
19 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
20 select HAVE_GENERIC_DMA_COHERENT
22 The ARM series is a line of low-power-consumption RISC chip designs
23 licensed by ARM Ltd and targeted at embedded applications and
24 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
25 manufactured, but legacy ARM-based PC hardware remains popular in
26 Europe. There is an ARM Linux project with a web page at
27 <http://www.arm.linux.org.uk/>.
32 config SYS_SUPPORTS_APM_EMULATION
41 config GENERIC_CLOCKEVENTS
44 config GENERIC_CLOCKEVENTS_BROADCAST
46 depends on GENERIC_CLOCKEVENTS
47 default y if SMP && !LOCAL_TIMERS
59 The Extended Industry Standard Architecture (EISA) bus was
60 developed as an open alternative to the IBM MicroChannel bus.
62 The EISA bus provided some of the features of the IBM MicroChannel
63 bus while maintaining backward compatibility with cards made for
64 the older ISA bus. The EISA bus saw limited use between 1988 and
65 1995 when it was made obsolete by the PCI bus.
67 Say Y here if you are building a kernel for an EISA-based machine.
77 MicroChannel Architecture is found in some IBM PS/2 machines and
78 laptops. It is a bus system similar to PCI or ISA. See
79 <file:Documentation/mca.txt> (and especially the web page given
80 there) before attempting to build an MCA bus kernel.
82 config GENERIC_HARDIRQS
86 config STACKTRACE_SUPPORT
90 config HAVE_LATENCYTOP_SUPPORT
95 config LOCKDEP_SUPPORT
99 config TRACE_IRQFLAGS_SUPPORT
103 config HARDIRQS_SW_RESEND
107 config GENERIC_IRQ_PROBE
111 config GENERIC_LOCKBREAK
114 depends on SMP && PREEMPT
116 config RWSEM_GENERIC_SPINLOCK
120 config RWSEM_XCHGADD_ALGORITHM
123 config ARCH_HAS_ILOG2_U32
126 config ARCH_HAS_ILOG2_U64
129 config GENERIC_HWEIGHT
133 config GENERIC_CALIBRATE_DELAY
137 config ARCH_MAY_HAVE_PC_FDC
143 config GENERIC_ISA_DMA
152 config GENERIC_HARDIRQS_NO__DO_IRQ
157 config OPROFILE_ARMV6
159 depends on CPU_V6 && !SMP
160 select OPROFILE_ARM11_CORE
162 config OPROFILE_MPCORE
164 depends on CPU_V6 && SMP
165 select OPROFILE_ARM11_CORE
167 config OPROFILE_ARM11_CORE
170 config OPROFILE_ARMV7
172 depends on CPU_V7 && !SMP
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 prompt "ARM system type"
193 default ARCH_VERSATILE
196 bool "Agilent AAEC-2000 based"
201 This enables support for systems based on the Agilent AAEC-2000
203 config ARCH_INTEGRATOR
204 bool "ARM Ltd. Integrator family"
210 Support for ARM's Integrator platform.
213 bool "ARM Ltd. RealView family"
219 select GENERIC_CLOCKEVENTS
220 select ARCH_WANT_OPTIONAL_GPIOLIB
222 This enables support for ARM Ltd RealView boards.
224 config ARCH_VERSATILE
225 bool "ARM Ltd. Versatile family"
232 select GENERIC_CLOCKEVENTS
233 select ARCH_WANT_OPTIONAL_GPIOLIB
235 This enables support for ARM Ltd Versatile board.
240 select ARCH_REQUIRE_GPIOLIB
243 This enables support for systems based on the Atmel AT91RM9200,
244 AT91SAM9 and AT91CAP9 processors.
247 bool "Cirrus Logic CLPS711x/EP721x-based"
250 Support for Cirrus Logic 711x/721x based boards.
253 bool "Cortina Systems Gemini"
256 select ARCH_REQUIRE_GPIOLIB
258 Support for the Cortina Systems Gemini family SoCs
266 This is an evaluation board for the StrongARM processor available
267 from Digital. It has limited hardware on-board, including an
268 Ethernet interface, two PCMCIA sockets, two serial ports and a
279 select ARCH_REQUIRE_GPIOLIB
280 select ARCH_HAS_HOLES_MEMORYMODEL
282 This enables support for the Cirrus EP93xx series of CPUs.
284 config ARCH_FOOTBRIDGE
289 Support for systems based on the DC21285 companion chip
290 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
293 bool "Freescale MXC/iMX-based"
295 select GENERIC_CLOCKEVENTS
298 select ARCH_REQUIRE_GPIOLIB
301 Support for Freescale MXC/iMX-based family of processors
304 bool "Freescale STMP3xxx"
308 select ARCH_REQUIRE_GPIOLIB
310 select GENERIC_CLOCKEVENTS
312 select USB_ARCH_HAS_EHCI
314 Support for systems based on the Freescale 3xxx CPUs.
317 bool "Hilscher NetX based"
320 select GENERIC_CLOCKEVENTS
323 This enables support for systems based on the Hilscher NetX Soc
326 bool "Hynix HMS720x-based"
330 This enables support for systems based on the Hynix HMS720x
338 select ARCH_SUPPORTS_MSI
341 Support for Intel's IOP13XX (XScale) family of processors.
350 select ARCH_REQUIRE_GPIOLIB
352 Support for Intel's 80219 and IOP32X (XScale) family of
362 select ARCH_REQUIRE_GPIOLIB
364 Support for Intel's IOP33X (XScale) family of processors.
372 Support for Intel's IXP23xx (XScale) family of processors.
375 bool "IXP2400/2800-based"
380 Support for Intel's IXP2400/2800 (XScale) family of processors.
388 select GENERIC_CLOCKEVENTS
389 select DMABOUNCE if PCI
391 Support for Intel's IXP4XX (XScale) family of processors.
398 Say Y here if you intend to run this kernel on a LinkUp Systems
399 L7200 Software Development Board which uses an ARM720T processor.
400 Information on this board can be obtained at:
402 <http://www.linkupsys.com/>
404 If you have any questions or comments about the Linux kernel port
405 to this board, send e-mail to <sjhill@cotw.com>.
408 bool "Marvell Kirkwood"
412 select ARCH_REQUIRE_GPIOLIB
414 select GENERIC_CLOCKEVENTS
417 Support for the following Marvell Kirkwood series SoCs:
418 88F6180, 88F6192 and 88F6281.
421 bool "Marvell Loki (88RC8480)"
424 select GENERIC_CLOCKEVENTS
427 Support for the Marvell Loki (88RC8480) SoC.
430 bool "Marvell MV78xx0"
434 select ARCH_REQUIRE_GPIOLIB
436 select GENERIC_CLOCKEVENTS
439 Support for the following Marvell MV78xx0 series SoCs:
448 select ARCH_REQUIRE_GPIOLIB
450 select GENERIC_CLOCKEVENTS
453 Support for the following Marvell Orion 5x series SoCs:
454 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
455 Orion-2 (5281), Orion-1-90 (6183).
458 bool "Marvell PXA168/910"
461 select ARCH_REQUIRE_GPIOLIB
465 select GENERIC_CLOCKEVENTS
469 Support for Marvell's PXA168/910 processor line.
472 bool "Micrel/Kendin KS8695"
475 select ARCH_REQUIRE_GPIOLIB
477 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
478 System-on-Chip devices.
481 bool "NetSilicon NS9xxx"
485 select GENERIC_CLOCKEVENTS
488 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
491 <http://www.digi.com/products/microprocessors/index.jsp>
494 bool "Nuvoton W90X900 CPU"
496 select ARCH_REQUIRE_GPIOLIB
501 select GENERIC_CLOCKEVENTS
503 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
504 At present, the w90x900 has been renamed nuc900, regarding
505 the ARM series product line, you can login the following
506 link address to know more.
508 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
509 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
512 bool "Philips Nexperia PNX4008 Mobile"
516 This enables support for Philips PNX4008 mobile platform.
519 bool "PXA2xx/PXA3xx-based"
525 select ARCH_REQUIRE_GPIOLIB
527 select GENERIC_CLOCKEVENTS
531 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
537 select GENERIC_CLOCKEVENTS
539 Support for Qualcomm MSM7K based systems. This runs on the ARM11
540 apps processor of the MSM7K and depends on a shared memory
541 interface to the ARM9 modem processor which runs the baseband stack
542 and controls some vital subsystems (clock and power control, etc).
549 select ARCH_MAY_HAVE_PC_FDC
550 select HAVE_PATA_PLATFORM
553 select ARCH_SPARSEMEM_ENABLE
555 On the Acorn Risc-PC, Linux can support the internal IDE disk and
556 CD-ROM interface, serial and parallel port, and the floppy drive.
562 select ARCH_SPARSEMEM_ENABLE
566 select GENERIC_CLOCKEVENTS
569 select ARCH_REQUIRE_GPIOLIB
571 Support for StrongARM 11x0 based boards.
574 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
578 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
579 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
580 the Samsung SMDK2410 development board (and derivatives).
583 bool "Samsung S3C64XX"
587 Samsung S3C64XX series based systems
597 Support for the StrongARM based Digital DNARD machine, also known
598 as "Shark" (<http://www.shark-linux.de/shark.html>).
603 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
604 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
606 Say Y here for systems based on one of the Sharp LH7A40X
607 System on a Chip processors. These CPUs include an ARM922T
608 core with a wide array of integrated devices for
609 hand-held and low-power applications.
612 bool "ST-Ericsson U300 Series"
618 select GENERIC_CLOCKEVENTS
623 Support for ST-Ericsson U300 series mobile platforms.
629 select GENERIC_CLOCKEVENTS
631 select ARCH_REQUIRE_GPIOLIB
636 select GENERIC_ALLOCATOR
638 Support for TI's DaVinci platform.
644 select ARCH_REQUIRE_GPIOLIB
646 select GENERIC_CLOCKEVENTS
648 Support for TI's OMAP platform (OMAP1 and OMAP2).
651 bool "Broadcom BCMRING"
657 select GENERIC_CLOCKEVENTS
658 select ARCH_WANT_OPTIONAL_GPIOLIB
660 Support for Broadcom's BCMRing platform.
664 source "arch/arm/mach-clps711x/Kconfig"
666 source "arch/arm/mach-ep93xx/Kconfig"
668 source "arch/arm/mach-footbridge/Kconfig"
670 source "arch/arm/mach-gemini/Kconfig"
672 source "arch/arm/mach-integrator/Kconfig"
674 source "arch/arm/mach-iop32x/Kconfig"
676 source "arch/arm/mach-iop33x/Kconfig"
678 source "arch/arm/mach-iop13xx/Kconfig"
680 source "arch/arm/mach-ixp4xx/Kconfig"
682 source "arch/arm/mach-ixp2000/Kconfig"
684 source "arch/arm/mach-ixp23xx/Kconfig"
686 source "arch/arm/mach-loki/Kconfig"
688 source "arch/arm/mach-mv78xx0/Kconfig"
690 source "arch/arm/mach-pxa/Kconfig"
691 source "arch/arm/plat-pxa/Kconfig"
693 source "arch/arm/mach-mmp/Kconfig"
695 source "arch/arm/mach-sa1100/Kconfig"
697 source "arch/arm/plat-omap/Kconfig"
699 source "arch/arm/mach-omap1/Kconfig"
701 source "arch/arm/mach-omap2/Kconfig"
703 source "arch/arm/mach-orion5x/Kconfig"
705 source "arch/arm/mach-kirkwood/Kconfig"
707 source "arch/arm/plat-s3c24xx/Kconfig"
708 source "arch/arm/plat-s3c64xx/Kconfig"
709 source "arch/arm/plat-s3c/Kconfig"
712 source "arch/arm/mach-s3c2400/Kconfig"
713 source "arch/arm/mach-s3c2410/Kconfig"
714 source "arch/arm/mach-s3c2412/Kconfig"
715 source "arch/arm/mach-s3c2440/Kconfig"
716 source "arch/arm/mach-s3c2442/Kconfig"
717 source "arch/arm/mach-s3c2443/Kconfig"
721 source "arch/arm/mach-s3c6400/Kconfig"
722 source "arch/arm/mach-s3c6410/Kconfig"
725 source "arch/arm/plat-stmp3xxx/Kconfig"
727 source "arch/arm/mach-lh7a40x/Kconfig"
729 source "arch/arm/mach-h720x/Kconfig"
731 source "arch/arm/mach-versatile/Kconfig"
733 source "arch/arm/mach-aaec2000/Kconfig"
735 source "arch/arm/mach-realview/Kconfig"
737 source "arch/arm/mach-at91/Kconfig"
739 source "arch/arm/plat-mxc/Kconfig"
741 source "arch/arm/mach-netx/Kconfig"
743 source "arch/arm/mach-ns9xxx/Kconfig"
745 source "arch/arm/mach-davinci/Kconfig"
747 source "arch/arm/mach-ks8695/Kconfig"
749 source "arch/arm/mach-msm/Kconfig"
751 source "arch/arm/mach-u300/Kconfig"
753 source "arch/arm/mach-w90x900/Kconfig"
755 source "arch/arm/mach-bcmring/Kconfig"
757 # Definitions to make life easier
770 source arch/arm/mm/Kconfig
773 bool "Enable iWMMXt support"
774 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
775 default y if PXA27x || PXA3xx || ARCH_MMP
777 Enable support for iWMMXt context switching at run time if
778 running on a CPU that supports it.
780 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
783 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
787 source "arch/arm/Kconfig-nommu"
790 config ARM_ERRATA_411920
791 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
792 depends on CPU_V6 && !SMP
794 Invalidation of the Instruction Cache operation can
795 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
796 It does not affect the MPCore. This option enables the ARM Ltd.
797 recommended workaround.
799 config ARM_ERRATA_430973
800 bool "ARM errata: Stale prediction on replaced interworking branch"
803 This option enables the workaround for the 430973 Cortex-A8
804 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
805 interworking branch is replaced with another code sequence at the
806 same virtual address, whether due to self-modifying code or virtual
807 to physical address re-mapping, Cortex-A8 does not recover from the
808 stale interworking branch prediction. This results in Cortex-A8
809 executing the new code sequence in the incorrect ARM or Thumb state.
810 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
811 and also flushes the branch target cache at every context switch.
812 Note that setting specific bits in the ACTLR register may not be
813 available in non-secure mode.
815 config ARM_ERRATA_458693
816 bool "ARM errata: Processor deadlock when a false hazard is created"
819 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
820 erratum. For very specific sequences of memory operations, it is
821 possible for a hazard condition intended for a cache line to instead
822 be incorrectly associated with a different cache line. This false
823 hazard might then cause a processor deadlock. The workaround enables
824 the L1 caching of the NEON accesses and disables the PLD instruction
825 in the ACTLR register. Note that setting specific bits in the ACTLR
826 register may not be available in non-secure mode.
828 config ARM_ERRATA_460075
829 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
832 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
833 erratum. Any asynchronous access to the L2 cache may encounter a
834 situation in which recent store transactions to the L2 cache are lost
835 and overwritten with stale memory contents from external memory. The
836 workaround disables the write-allocate mode for the L2 cache via the
837 ACTLR register. Note that setting specific bits in the ACTLR register
838 may not be available in non-secure mode.
842 source "arch/arm/common/Kconfig"
844 config FORCE_MAX_ZONEORDER
857 Find out whether you have ISA slots on your motherboard. ISA is the
858 name of a bus system, i.e. the way the CPU talks to the other stuff
859 inside your box. Other bus systems are PCI, EISA, MicroChannel
860 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
861 newer boards don't support it. If you have ISA, say Y, otherwise N.
863 # Select ISA DMA controller support
868 # Select ISA DMA interface
873 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
875 Find out whether you have a PCI motherboard. PCI is the name of a
876 bus system, i.e. the way the CPU talks to the other stuff inside
877 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
878 VESA. If you have PCI, say Y, otherwise N.
883 # Select the host bridge type
884 config PCI_HOST_VIA82C505
886 depends on PCI && ARCH_SHARK
889 config PCI_HOST_ITE8152
891 depends on PCI && MACH_ARMCORE
895 source "drivers/pci/Kconfig"
897 source "drivers/pcmcia/Kconfig"
901 menu "Kernel Features"
903 source "kernel/time/Kconfig"
906 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
907 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
908 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
909 depends on GENERIC_CLOCKEVENTS
910 select USE_GENERIC_SMP_HELPERS
911 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4)
913 This enables support for systems with more than one CPU. If you have
914 a system with only one CPU, like most personal computers, say N. If
915 you have a system with more than one CPU, say Y.
917 If you say N here, the kernel will run on single and multiprocessor
918 machines, but will use only one CPU of a multiprocessor machine. If
919 you say Y here, the kernel will run on many, but not all, single
920 processor machines. On a single processor machine, the kernel will
921 run faster if you say N here.
923 See also <file:Documentation/i386/IO-APIC.txt>,
924 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
925 <http://www.linuxdoc.org/docs.html#howto>.
927 If you don't know what to do here, say N.
933 This option enables support for the ARM system coherency unit
939 This options enables support for the ARM timer and watchdog unit
942 prompt "Memory split"
945 Select the desired split between kernel and user memory.
947 If you are not absolutely sure what you are doing, leave this
951 bool "3G/1G user/kernel split"
953 bool "2G/2G user/kernel split"
955 bool "1G/3G user/kernel split"
960 default 0x40000000 if VMSPLIT_1G
961 default 0x80000000 if VMSPLIT_2G
965 int "Maximum number of CPUs (2-32)"
971 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
972 depends on SMP && HOTPLUG && EXPERIMENTAL
974 Say Y here to experiment with turning CPUs off and on. CPUs
975 can be controlled through /sys/devices/system/cpu.
978 bool "Use local timer interrupts"
979 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
980 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
982 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4)
984 Enable support for local timers on SMP platforms, rather then the
985 legacy IPI broadcast method. Local timers allows the system
986 accounting to be spread across the timer interval, preventing a
987 "thundering herd" at every timer tick.
990 bool "Preemptible Kernel (EXPERIMENTAL)"
991 depends on EXPERIMENTAL
993 This option reduces the latency of the kernel when reacting to
994 real-time or interactive events by allowing a low priority process to
995 be preempted even if it is in kernel mode executing a system call.
996 This allows applications to run more reliably even when the system is
999 Say Y here if you are building a kernel for a desktop, embedded
1000 or real-time system. Say N if you are unsure.
1004 default 128 if ARCH_L7200
1005 default 200 if ARCH_EBSA110 || ARCH_S3C2410
1006 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1007 default AT91_TIMER_HZ if ARCH_AT91
1011 bool "Use the ARM EABI to compile the kernel"
1013 This option allows for the kernel to be compiled using the latest
1014 ARM ABI (aka EABI). This is only useful if you are using a user
1015 space environment that is also compiled with EABI.
1017 Since there are major incompatibilities between the legacy ABI and
1018 EABI, especially with regard to structure member alignment, this
1019 option also changes the kernel syscall calling convention to
1020 disambiguate both ABIs and allow for backward compatibility support
1021 (selected with CONFIG_OABI_COMPAT).
1023 To use this you need GCC version 4.0.0 or later.
1026 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1027 depends on AEABI && EXPERIMENTAL
1030 This option preserves the old syscall interface along with the
1031 new (ARM EABI) one. It also provides a compatibility layer to
1032 intercept syscalls that have structure arguments which layout
1033 in memory differs between the legacy ABI and the new ARM EABI
1034 (only for non "thumb" binaries). This option adds a tiny
1035 overhead to all syscalls and produces a slightly larger kernel.
1036 If you know you'll be using only pure EABI user space then you
1037 can say N here. If this option is not selected and you attempt
1038 to execute a legacy ABI binary then the result will be
1039 UNPREDICTABLE (in fact it can be predicted that it won't work
1040 at all). If in doubt say Y.
1042 config ARCH_HAS_HOLES_MEMORYMODEL
1045 # Discontigmem is deprecated
1046 config ARCH_DISCONTIGMEM_ENABLE
1049 config ARCH_SPARSEMEM_ENABLE
1052 config ARCH_SPARSEMEM_DEFAULT
1053 def_bool ARCH_SPARSEMEM_ENABLE
1055 config ARCH_SELECT_MEMORY_MODEL
1056 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1060 default "4" if ARCH_LH7A40X
1062 depends on NEED_MULTIPLE_NODES
1065 bool "High Memory Support (EXPERIMENTAL)"
1066 depends on MMU && EXPERIMENTAL
1068 The address space of ARM processors is only 4 Gigabytes large
1069 and it has to accommodate user address space, kernel address
1070 space as well as some memory mapped IO. That means that, if you
1071 have a large amount of physical memory and/or IO, not all of the
1072 memory can be "permanently mapped" by the kernel. The physical
1073 memory that is not permanently mapped is called "high memory".
1075 Depending on the selected kernel/user memory split, minimum
1076 vmalloc space and actual amount of RAM, you may not need this
1077 option which should result in a slightly faster kernel.
1082 bool "Allocate 2nd-level pagetables from highmem"
1084 depends on !OUTER_CACHE
1089 bool "Timer and CPU usage LEDs"
1090 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1091 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1092 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1093 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1094 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1095 ARCH_AT91 || ARCH_DAVINCI || \
1096 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1098 If you say Y here, the LEDs on your machine will be used
1099 to provide useful information about your current system status.
1101 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1102 be able to select which LEDs are active using the options below. If
1103 you are compiling a kernel for the EBSA-110 or the LART however, the
1104 red LED will simply flash regularly to indicate that the system is
1105 still functional. It is safe to say Y here if you have a CATS
1106 system, but the driver will do nothing.
1109 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1110 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1111 || MACH_OMAP_PERSEUS2
1113 depends on !GENERIC_CLOCKEVENTS
1114 default y if ARCH_EBSA110
1116 If you say Y here, one of the system LEDs (the green one on the
1117 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1118 will flash regularly to indicate that the system is still
1119 operational. This is mainly useful to kernel hackers who are
1120 debugging unstable kernels.
1122 The LART uses the same LED for both Timer LED and CPU usage LED
1123 functions. You may choose to use both, but the Timer LED function
1124 will overrule the CPU usage LED.
1127 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1129 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1130 || MACH_OMAP_PERSEUS2
1133 If you say Y here, the red LED will be used to give a good real
1134 time indication of CPU usage, by lighting whenever the idle task
1135 is not currently executing.
1137 The LART uses the same LED for both Timer LED and CPU usage LED
1138 functions. You may choose to use both, but the Timer LED function
1139 will overrule the CPU usage LED.
1141 config ALIGNMENT_TRAP
1143 depends on CPU_CP15_MMU
1144 default y if !ARCH_EBSA110
1146 ARM processors cannot fetch/store information which is not
1147 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1148 address divisible by 4. On 32-bit ARM processors, these non-aligned
1149 fetch/store instructions will be emulated in software if you say
1150 here, which has a severe performance impact. This is necessary for
1151 correct operation of some network protocols. With an IP-only
1152 configuration it is safe to say N, otherwise say Y.
1154 config UACCESS_WITH_MEMCPY
1155 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1156 depends on MMU && EXPERIMENTAL
1157 default y if CPU_FEROCEON
1159 Implement faster copy_to_user and clear_user methods for CPU
1160 cores where a 8-word STM instruction give significantly higher
1161 memory write throughput than a sequence of individual 32bit stores.
1163 A possible side effect is a slight increase in scheduling latency
1164 between threads sharing the same address space if they invoke
1165 such copy operations with large buffers.
1167 However, if the CPU data cache is using a write-allocate mode,
1168 this option is unlikely to provide any performance gain.
1174 # Compressed boot loader in ROM. Yes, we really want to ask about
1175 # TEXT and BSS so we preserve their values in the config files.
1176 config ZBOOT_ROM_TEXT
1177 hex "Compressed ROM boot loader base address"
1180 The physical address at which the ROM-able zImage is to be
1181 placed in the target. Platforms which normally make use of
1182 ROM-able zImage formats normally set this to a suitable
1183 value in their defconfig file.
1185 If ZBOOT_ROM is not enabled, this has no effect.
1187 config ZBOOT_ROM_BSS
1188 hex "Compressed ROM boot loader BSS address"
1191 The base address of an area of read/write memory in the target
1192 for the ROM-able zImage which must be available while the
1193 decompressor is running. It must be large enough to hold the
1194 entire decompressed kernel plus an additional 128 KiB.
1195 Platforms which normally make use of ROM-able zImage formats
1196 normally set this to a suitable value in their defconfig file.
1198 If ZBOOT_ROM is not enabled, this has no effect.
1201 bool "Compressed boot loader in ROM/flash"
1202 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1204 Say Y here if you intend to execute your compressed kernel image
1205 (zImage) directly from ROM or flash. If unsure, say N.
1208 string "Default kernel command string"
1211 On some architectures (EBSA110 and CATS), there is currently no way
1212 for the boot loader to pass arguments to the kernel. For these
1213 architectures, you should supply some command-line options at build
1214 time by entering them here. As a minimum, you should specify the
1215 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1218 bool "Kernel Execute-In-Place from ROM"
1219 depends on !ZBOOT_ROM
1221 Execute-In-Place allows the kernel to run from non-volatile storage
1222 directly addressable by the CPU, such as NOR flash. This saves RAM
1223 space since the text section of the kernel is not loaded from flash
1224 to RAM. Read-write sections, such as the data section and stack,
1225 are still copied to RAM. The XIP kernel is not compressed since
1226 it has to run directly from flash, so it will take more space to
1227 store it. The flash address used to link the kernel object files,
1228 and for storing it, is configuration dependent. Therefore, if you
1229 say Y here, you must know the proper physical address where to
1230 store the kernel image depending on your own flash memory usage.
1232 Also note that the make target becomes "make xipImage" rather than
1233 "make zImage" or "make Image". The final kernel binary to put in
1234 ROM memory will be arch/arm/boot/xipImage.
1238 config XIP_PHYS_ADDR
1239 hex "XIP Kernel Physical Location"
1240 depends on XIP_KERNEL
1241 default "0x00080000"
1243 This is the physical address in your flash memory the kernel will
1244 be linked for and stored to. This address is dependent on your
1248 bool "Kexec system call (EXPERIMENTAL)"
1249 depends on EXPERIMENTAL
1251 kexec is a system call that implements the ability to shutdown your
1252 current kernel, and to start another kernel. It is like a reboot
1253 but it is independent of the system firmware. And like a reboot
1254 you can start any kernel with it, not just Linux.
1256 It is an ongoing process to be certain the hardware in a machine
1257 is properly shutdown, so do not be surprised if this code does not
1258 initially work for you. It may help to enable device hotplugging
1262 bool "Export atags in procfs"
1266 Should the atags used to boot the kernel be exported in an "atags"
1267 file in procfs. Useful with kexec.
1271 menu "CPU Power Management"
1273 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_PXA || ARCH_S3C64XX)
1275 source "drivers/cpufreq/Kconfig"
1277 config CPU_FREQ_SA1100
1279 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1282 config CPU_FREQ_SA1110
1284 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1287 config CPU_FREQ_INTEGRATOR
1288 tristate "CPUfreq driver for ARM Integrator CPUs"
1289 depends on ARCH_INTEGRATOR && CPU_FREQ
1292 This enables the CPUfreq driver for ARM Integrator CPUs.
1294 For details, take a look at <file:Documentation/cpu-freq>.
1300 depends on CPU_FREQ && ARCH_PXA && PXA25x
1302 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1304 config CPU_FREQ_S3C64XX
1305 bool "CPUfreq support for Samsung S3C64XX CPUs"
1306 depends on CPU_FREQ && CPU_S3C6410
1310 source "drivers/cpuidle/Kconfig"
1314 menu "Floating point emulation"
1316 comment "At least one emulation must be selected"
1319 bool "NWFPE math emulation"
1320 depends on !AEABI || OABI_COMPAT
1322 Say Y to include the NWFPE floating point emulator in the kernel.
1323 This is necessary to run most binaries. Linux does not currently
1324 support floating point hardware so you need to say Y here even if
1325 your machine has an FPA or floating point co-processor podule.
1327 You may say N here if you are going to load the Acorn FPEmulator
1328 early in the bootup.
1331 bool "Support extended precision"
1332 depends on FPE_NWFPE
1334 Say Y to include 80-bit support in the kernel floating-point
1335 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1336 Note that gcc does not generate 80-bit operations by default,
1337 so in most cases this option only enlarges the size of the
1338 floating point emulator without any good reason.
1340 You almost surely want to say N here.
1343 bool "FastFPE math emulation (EXPERIMENTAL)"
1344 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1346 Say Y here to include the FAST floating point emulator in the kernel.
1347 This is an experimental much faster emulator which now also has full
1348 precision for the mantissa. It does not support any exceptions.
1349 It is very simple, and approximately 3-6 times faster than NWFPE.
1351 It should be sufficient for most programs. It may be not suitable
1352 for scientific calculations, but you have to check this for yourself.
1353 If you do not feel you need a faster FP emulation you should better
1357 bool "VFP-format floating point maths"
1358 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1360 Say Y to include VFP support code in the kernel. This is needed
1361 if your hardware includes a VFP unit.
1363 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1364 release notes and additional status information.
1366 Say N if your target does not have VFP hardware.
1374 bool "Advanced SIMD (NEON) Extension support"
1375 depends on VFPv3 && CPU_V7
1377 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1382 menu "Userspace binary formats"
1384 source "fs/Kconfig.binfmt"
1387 tristate "RISC OS personality"
1390 Say Y here to include the kernel code necessary if you want to run
1391 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1392 experimental; if this sounds frightening, say N and sleep in peace.
1393 You can also say M here to compile this support as a module (which
1394 will be called arthur).
1398 menu "Power management options"
1400 source "kernel/power/Kconfig"
1402 config ARCH_SUSPEND_POSSIBLE
1407 source "net/Kconfig"
1409 menu "Device Drivers"
1411 source "drivers/base/Kconfig"
1413 source "drivers/connector/Kconfig"
1415 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1416 source "drivers/mtd/Kconfig"
1419 source "drivers/parport/Kconfig"
1421 source "drivers/pnp/Kconfig"
1423 source "drivers/block/Kconfig"
1425 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1427 source "drivers/misc/Kconfig"
1429 source "drivers/ide/Kconfig"
1431 source "drivers/scsi/Kconfig"
1433 source "drivers/ata/Kconfig"
1435 source "drivers/md/Kconfig"
1437 source "drivers/message/fusion/Kconfig"
1439 source "drivers/ieee1394/Kconfig"
1441 source "drivers/message/i2o/Kconfig"
1443 source "drivers/net/Kconfig"
1445 source "drivers/isdn/Kconfig"
1447 # input before char - char/joystick depends on it. As does USB.
1449 source "drivers/input/Kconfig"
1451 source "drivers/char/Kconfig"
1453 source "drivers/i2c/Kconfig"
1455 source "drivers/spi/Kconfig"
1457 source "drivers/gpio/Kconfig"
1459 source "drivers/w1/Kconfig"
1461 source "drivers/power/Kconfig"
1463 source "drivers/hwmon/Kconfig"
1465 source "drivers/thermal/Kconfig"
1467 source "drivers/watchdog/Kconfig"
1469 source "drivers/ssb/Kconfig"
1471 #source "drivers/l3/Kconfig"
1473 source "drivers/mfd/Kconfig"
1475 source "drivers/media/Kconfig"
1477 source "drivers/video/Kconfig"
1479 source "sound/Kconfig"
1481 source "drivers/hid/Kconfig"
1483 source "drivers/usb/Kconfig"
1485 source "drivers/uwb/Kconfig"
1487 source "drivers/mmc/Kconfig"
1489 source "drivers/memstick/Kconfig"
1491 source "drivers/accessibility/Kconfig"
1493 source "drivers/leds/Kconfig"
1495 source "drivers/rtc/Kconfig"
1497 source "drivers/dma/Kconfig"
1499 source "drivers/dca/Kconfig"
1501 source "drivers/auxdisplay/Kconfig"
1503 source "drivers/regulator/Kconfig"
1505 source "drivers/uio/Kconfig"
1507 source "drivers/staging/Kconfig"
1513 source "arch/arm/Kconfig.debug"
1515 source "security/Kconfig"
1517 source "crypto/Kconfig"
1519 source "lib/Kconfig"