2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
6 mainmenu "Linux Kernel Configuration"
13 select SYS_SUPPORTS_APM_EMULATION
15 select HAVE_KPROBES if (!XIP_KERNEL)
16 select HAVE_KRETPROBES if (HAVE_KPROBES)
18 The ARM series is a line of low-power-consumption RISC chip designs
19 licensed by ARM Ltd and targeted at embedded applications and
20 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
21 manufactured, but legacy ARM-based PC hardware remains popular in
22 Europe. There is an ARM Linux project with a web page at
23 <http://www.arm.linux.org.uk/>.
25 config SYS_SUPPORTS_APM_EMULATION
36 config GENERIC_CLOCKEVENTS
40 config GENERIC_CLOCKEVENTS_BROADCAST
42 depends on GENERIC_CLOCKEVENTS
43 default y if SMP && !LOCAL_TIMERS
56 The Extended Industry Standard Architecture (EISA) bus was
57 developed as an open alternative to the IBM MicroChannel bus.
59 The EISA bus provided some of the features of the IBM MicroChannel
60 bus while maintaining backward compatibility with cards made for
61 the older ISA bus. The EISA bus saw limited use between 1988 and
62 1995 when it was made obsolete by the PCI bus.
64 Say Y here if you are building a kernel for an EISA-based machine.
74 MicroChannel Architecture is found in some IBM PS/2 machines and
75 laptops. It is a bus system similar to PCI or ISA. See
76 <file:Documentation/mca.txt> (and especially the web page given
77 there) before attempting to build an MCA bus kernel.
79 config GENERIC_HARDIRQS
83 config STACKTRACE_SUPPORT
87 config HAVE_LATENCYTOP_SUPPORT
92 config LOCKDEP_SUPPORT
96 config TRACE_IRQFLAGS_SUPPORT
100 config HARDIRQS_SW_RESEND
104 config GENERIC_IRQ_PROBE
108 config GENERIC_LOCKBREAK
111 depends on SMP && PREEMPT
113 config RWSEM_GENERIC_SPINLOCK
117 config RWSEM_XCHGADD_ALGORITHM
120 config ARCH_HAS_ILOG2_U32
124 config ARCH_HAS_ILOG2_U64
128 config GENERIC_HWEIGHT
132 config GENERIC_CALIBRATE_DELAY
136 config ARCH_SUPPORTS_AOUT
139 config ARCH_MAY_HAVE_PC_FDC
146 config GENERIC_ISA_DMA
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
174 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
175 default DRAM_BASE if REMAP_VECTORS_TO_RAM
178 The base address of exception vectors.
180 source "init/Kconfig"
185 prompt "ARM system type"
186 default ARCH_VERSATILE
189 bool "Agilent AAEC-2000 based"
192 This enables support for systems based on the Agilent AAEC-2000
194 config ARCH_INTEGRATOR
195 bool "ARM Ltd. Integrator family"
199 Support for ARM's Integrator platform.
202 bool "ARM Ltd. RealView family"
206 select GENERIC_CLOCKEVENTS
208 This enables support for ARM Ltd RealView boards.
210 config ARCH_VERSATILE
211 bool "ARM Ltd. Versatile family"
216 select GENERIC_CLOCKEVENTS
218 This enables support for ARM Ltd Versatile board.
224 This enables support for systems based on the Atmel AT91RM9200,
225 AT91SAM9 and AT91CAP9 processors.
228 bool "Cirrus CL-PS7500FE"
233 Support for the Cirrus Logic PS7500FE system-on-a-chip.
236 bool "Cirrus Logic CLPS711x/EP721x-based"
238 Support for Cirrus Logic 711x/721x based boards.
243 select FOOTBRIDGE_ADDIN
245 Support for Intel's EBSA285 companion chip.
252 This is an evaluation board for the StrongARM processor available
253 from Digital. It has limited hardware on-board, including an
254 Ethernet interface, two PCMCIA sockets, two serial ports and a
264 This enables support for the Cirrus EP93xx series of CPUs.
266 config ARCH_FOOTBRIDGE
270 Support for systems based on the DC21285 companion chip
271 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
274 bool "Hilscher NetX based"
277 This enables support for systems based on the Hilscher NetX Soc
280 bool "Hynix HMS720x-based"
283 This enables support for systems based on the Hynix HMS720x
289 select GENERIC_CLOCKEVENTS
291 Support for Motorola's i.MX family of processors (MX1, MXL).
298 select ARCH_SUPPORTS_MSI
300 Support for Intel's IOP13XX (XScale) family of processors.
308 Support for Intel's 80219 and IOP32X (XScale) family of
317 Support for Intel's IOP33X (XScale) family of processors.
324 Support for Intel's IXP23xx (XScale) family of processors.
327 bool "IXP2400/2800-based"
331 Support for Intel's IXP2400/2800 (XScale) family of processors.
338 select GENERIC_CLOCKEVENTS
340 Support for Intel's IXP4XX (XScale) family of processors.
346 Say Y here if you intend to run this kernel on a LinkUp Systems
347 L7200 Software Development Board which uses an ARM720T processor.
348 Information on this board can be obtained at:
350 <http://www.linkupsys.com/>
352 If you have any questions or comments about the Linux kernel port
353 to this board, send e-mail to <sjhill@cotw.com>.
356 bool "Marvell Kirkwood"
359 select GENERIC_CLOCKEVENTS
362 Support for the following Marvell Kirkwood series SoCs:
363 88F6180, 88F6192 and 88F6281.
366 bool "Micrel/Kendin KS8695"
369 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
370 System-on-Chip devices.
373 bool "NetSilicon NS9xxx"
376 select GENERIC_CLOCKEVENTS
378 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
381 <http://www.digi.com/products/microprocessors/index.jsp>
384 bool "Marvell Loki (88RC8480)"
386 select GENERIC_CLOCKEVENTS
389 Support for the Marvell Loki (88RC8480) SoC.
392 bool "Marvell MV78xx0"
395 select GENERIC_CLOCKEVENTS
398 Support for the following Marvell MV78xx0 series SoCs:
402 bool "Freescale MXC/iMX-based"
405 Support for Freescale MXC/iMX-based family of processors
413 select GENERIC_CLOCKEVENTS
416 Support for the following Marvell Orion 5x series SoCs:
417 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
421 bool "Philips Nexperia PNX4008 Mobile"
423 This enables support for Philips PNX4008 mobile platform.
426 bool "PXA2xx/PXA3xx-based"
432 select GENERIC_CLOCKEVENTS
435 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
442 select ARCH_MAY_HAVE_PC_FDC
446 On the Acorn Risc-PC, Linux can support the internal IDE disk and
447 CD-ROM interface, serial and parallel port, and the floppy drive.
452 select ARCH_DISCONTIGMEM_ENABLE
453 select ARCH_SPARSEMEM_ENABLE
454 select ARCH_SELECT_MEMORY_MODEL
458 select GENERIC_CLOCKEVENTS
462 Support for StrongARM 11x0 based boards.
465 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
468 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
469 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
470 the Samsung SMDK2410 development board (and derivatives).
478 Support for the StrongARM based Digital DNARD machine, also known
479 as "Shark" (<http://www.shark-linux.de/shark.html>).
484 Say Y here for systems based on one of the Sharp LH7A40X
485 System on a Chip processors. These CPUs include an ARM922T
486 core with a wide array of integrated devices for
487 hand-held and low-power applications.
492 select GENERIC_CLOCKEVENTS
495 Support for TI's DaVinci platform.
502 select GENERIC_CLOCKEVENTS
504 Support for TI's OMAP platform (OMAP1 and OMAP2).
507 bool "Qualcomm MSM7X00A"
509 select GENERIC_CLOCKEVENTS
511 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
512 apps processor of the MSM7X00A and depends on a shared memory
513 interface to the ARM9 modem processor which runs the baseband stack
514 and controls some vital subsystems (clock and power control, etc).
515 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
519 source "arch/arm/mach-clps711x/Kconfig"
521 source "arch/arm/mach-ep93xx/Kconfig"
523 source "arch/arm/mach-footbridge/Kconfig"
525 source "arch/arm/mach-integrator/Kconfig"
527 source "arch/arm/mach-iop32x/Kconfig"
529 source "arch/arm/mach-iop33x/Kconfig"
531 source "arch/arm/mach-iop13xx/Kconfig"
533 source "arch/arm/mach-ixp4xx/Kconfig"
535 source "arch/arm/mach-ixp2000/Kconfig"
537 source "arch/arm/mach-ixp23xx/Kconfig"
539 source "arch/arm/mach-loki/Kconfig"
541 source "arch/arm/mach-mv78xx0/Kconfig"
543 source "arch/arm/mach-pxa/Kconfig"
545 source "arch/arm/mach-sa1100/Kconfig"
547 source "arch/arm/plat-omap/Kconfig"
549 source "arch/arm/mach-omap1/Kconfig"
551 source "arch/arm/mach-omap2/Kconfig"
553 source "arch/arm/mach-orion5x/Kconfig"
555 source "arch/arm/mach-kirkwood/Kconfig"
557 source "arch/arm/plat-s3c24xx/Kconfig"
558 source "arch/arm/plat-s3c/Kconfig"
561 source "arch/arm/mach-s3c2400/Kconfig"
562 source "arch/arm/mach-s3c2410/Kconfig"
563 source "arch/arm/mach-s3c2412/Kconfig"
564 source "arch/arm/mach-s3c2440/Kconfig"
565 source "arch/arm/mach-s3c2442/Kconfig"
566 source "arch/arm/mach-s3c2443/Kconfig"
569 source "arch/arm/mach-lh7a40x/Kconfig"
571 source "arch/arm/mach-imx/Kconfig"
573 source "arch/arm/mach-h720x/Kconfig"
575 source "arch/arm/mach-versatile/Kconfig"
577 source "arch/arm/mach-aaec2000/Kconfig"
579 source "arch/arm/mach-realview/Kconfig"
581 source "arch/arm/mach-at91/Kconfig"
583 source "arch/arm/plat-mxc/Kconfig"
585 source "arch/arm/mach-netx/Kconfig"
587 source "arch/arm/mach-ns9xxx/Kconfig"
589 source "arch/arm/mach-davinci/Kconfig"
591 source "arch/arm/mach-ks8695/Kconfig"
593 source "arch/arm/mach-msm/Kconfig"
595 # Definitions to make life easier
605 source arch/arm/mm/Kconfig
608 bool "Enable iWMMXt support"
609 depends on CPU_XSCALE || CPU_XSC3
610 default y if PXA27x || PXA3xx
612 Enable support for iWMMXt context switching at run time if
613 running on a CPU that supports it.
615 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
618 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
622 source "arch/arm/Kconfig-nommu"
627 source "arch/arm/common/Kconfig"
629 config FORCE_MAX_ZONEORDER
642 Find out whether you have ISA slots on your motherboard. ISA is the
643 name of a bus system, i.e. the way the CPU talks to the other stuff
644 inside your box. Other bus systems are PCI, EISA, MicroChannel
645 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
646 newer boards don't support it. If you have ISA, say Y, otherwise N.
648 # Select ISA DMA controller support
653 # Select ISA DMA interface
658 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
660 Find out whether you have a PCI motherboard. PCI is the name of a
661 bus system, i.e. the way the CPU talks to the other stuff inside
662 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
663 VESA. If you have PCI, say Y, otherwise N.
668 # Select the host bridge type
669 config PCI_HOST_VIA82C505
671 depends on PCI && ARCH_SHARK
674 config PCI_HOST_ITE8152
676 depends on PCI && MACH_ARMCORE
680 source "drivers/pci/Kconfig"
682 source "drivers/pcmcia/Kconfig"
686 menu "Kernel Features"
688 source "kernel/time/Kconfig"
691 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
692 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
694 This enables support for systems with more than one CPU. If you have
695 a system with only one CPU, like most personal computers, say N. If
696 you have a system with more than one CPU, say Y.
698 If you say N here, the kernel will run on single and multiprocessor
699 machines, but will use only one CPU of a multiprocessor machine. If
700 you say Y here, the kernel will run on many, but not all, single
701 processor machines. On a single processor machine, the kernel will
702 run faster if you say N here.
704 See also <file:Documentation/i386/IO-APIC.txt>,
705 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
706 <http://www.linuxdoc.org/docs.html#howto>.
708 If you don't know what to do here, say N.
711 int "Maximum number of CPUs (2-32)"
717 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
718 depends on SMP && HOTPLUG && EXPERIMENTAL
720 Say Y here to experiment with turning CPUs off and on. CPUs
721 can be controlled through /sys/devices/system/cpu.
724 bool "Use local timer interrupts"
725 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
728 Enable support for local timers on SMP platforms, rather then the
729 legacy IPI broadcast method. Local timers allows the system
730 accounting to be spread across the timer interval, preventing a
731 "thundering herd" at every timer tick.
734 bool "Preemptible Kernel (EXPERIMENTAL)"
735 depends on EXPERIMENTAL
737 This option reduces the latency of the kernel when reacting to
738 real-time or interactive events by allowing a low priority process to
739 be preempted even if it is in kernel mode executing a system call.
740 This allows applications to run more reliably even when the system is
743 Say Y here if you are building a kernel for a desktop, embedded
744 or real-time system. Say N if you are unsure.
747 bool "Dynamic tick timer"
748 depends on !GENERIC_CLOCKEVENTS
750 Select this option if you want to disable continuous timer ticks
751 and have them programmed to occur as required. This option saves
752 power as the system can remain in idle state for longer.
754 By default dynamic tick is disabled during the boot, and can be
755 manually enabled with:
757 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
759 Alternatively, if you want dynamic tick automatically enabled
760 during boot, pass "dyntick=enable" via the kernel command string.
762 Please note that dynamic tick may affect the accuracy of
763 timekeeping on some platforms depending on the implementation.
764 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
765 to have accurate timekeeping with dynamic tick.
769 default 128 if ARCH_L7200
770 default 200 if ARCH_EBSA110 || ARCH_S3C2410
771 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
772 default AT91_TIMER_HZ if ARCH_AT91
776 bool "Use the ARM EABI to compile the kernel"
778 This option allows for the kernel to be compiled using the latest
779 ARM ABI (aka EABI). This is only useful if you are using a user
780 space environment that is also compiled with EABI.
782 Since there are major incompatibilities between the legacy ABI and
783 EABI, especially with regard to structure member alignment, this
784 option also changes the kernel syscall calling convention to
785 disambiguate both ABIs and allow for backward compatibility support
786 (selected with CONFIG_OABI_COMPAT).
788 To use this you need GCC version 4.0.0 or later.
791 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
792 depends on AEABI && EXPERIMENTAL
795 This option preserves the old syscall interface along with the
796 new (ARM EABI) one. It also provides a compatibility layer to
797 intercept syscalls that have structure arguments which layout
798 in memory differs between the legacy ABI and the new ARM EABI
799 (only for non "thumb" binaries). This option adds a tiny
800 overhead to all syscalls and produces a slightly larger kernel.
801 If you know you'll be using only pure EABI user space then you
802 can say N here. If this option is not selected and you attempt
803 to execute a legacy ABI binary then the result will be
804 UNPREDICTABLE (in fact it can be predicted that it won't work
805 at all). If in doubt say Y.
807 config ARCH_DISCONTIGMEM_ENABLE
809 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
811 Say Y to support efficient handling of discontiguous physical memory,
812 for architectures which are either NUMA (Non-Uniform Memory Access)
813 or have huge holes in the physical address space for other reasons.
814 See <file:Documentation/vm/numa> for more.
816 config ARCH_SPARSEMEM_ENABLE
819 config ARCH_SELECT_MEMORY_MODEL
824 default "4" if ARCH_LH7A40X
826 depends on NEED_MULTIPLE_NODES
831 bool "Timer and CPU usage LEDs"
832 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
833 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
834 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
835 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
836 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
837 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
838 ARCH_KS8695 || MACH_RD88F5182
840 If you say Y here, the LEDs on your machine will be used
841 to provide useful information about your current system status.
843 If you are compiling a kernel for a NetWinder or EBSA-285, you will
844 be able to select which LEDs are active using the options below. If
845 you are compiling a kernel for the EBSA-110 or the LART however, the
846 red LED will simply flash regularly to indicate that the system is
847 still functional. It is safe to say Y here if you have a CATS
848 system, but the driver will do nothing.
851 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
852 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
853 || MACH_OMAP_PERSEUS2
855 depends on !GENERIC_CLOCKEVENTS
856 default y if ARCH_EBSA110
858 If you say Y here, one of the system LEDs (the green one on the
859 NetWinder, the amber one on the EBSA285, or the red one on the LART)
860 will flash regularly to indicate that the system is still
861 operational. This is mainly useful to kernel hackers who are
862 debugging unstable kernels.
864 The LART uses the same LED for both Timer LED and CPU usage LED
865 functions. You may choose to use both, but the Timer LED function
866 will overrule the CPU usage LED.
869 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
871 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
872 || MACH_OMAP_PERSEUS2
875 If you say Y here, the red LED will be used to give a good real
876 time indication of CPU usage, by lighting whenever the idle task
877 is not currently executing.
879 The LART uses the same LED for both Timer LED and CPU usage LED
880 functions. You may choose to use both, but the Timer LED function
881 will overrule the CPU usage LED.
883 config ALIGNMENT_TRAP
885 depends on CPU_CP15_MMU
886 default y if !ARCH_EBSA110
888 ARM processors cannot fetch/store information which is not
889 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
890 address divisible by 4. On 32-bit ARM processors, these non-aligned
891 fetch/store instructions will be emulated in software if you say
892 here, which has a severe performance impact. This is necessary for
893 correct operation of some network protocols. With an IP-only
894 configuration it is safe to say N, otherwise say Y.
900 # Compressed boot loader in ROM. Yes, we really want to ask about
901 # TEXT and BSS so we preserve their values in the config files.
902 config ZBOOT_ROM_TEXT
903 hex "Compressed ROM boot loader base address"
906 The physical address at which the ROM-able zImage is to be
907 placed in the target. Platforms which normally make use of
908 ROM-able zImage formats normally set this to a suitable
909 value in their defconfig file.
911 If ZBOOT_ROM is not enabled, this has no effect.
914 hex "Compressed ROM boot loader BSS address"
917 The base address of an area of read/write memory in the target
918 for the ROM-able zImage which must be available while the
919 decompressor is running. It must be large enough to hold the
920 entire decompressed kernel plus an additional 128 KiB.
921 Platforms which normally make use of ROM-able zImage formats
922 normally set this to a suitable value in their defconfig file.
924 If ZBOOT_ROM is not enabled, this has no effect.
927 bool "Compressed boot loader in ROM/flash"
928 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
930 Say Y here if you intend to execute your compressed kernel image
931 (zImage) directly from ROM or flash. If unsure, say N.
934 string "Default kernel command string"
937 On some architectures (EBSA110 and CATS), there is currently no way
938 for the boot loader to pass arguments to the kernel. For these
939 architectures, you should supply some command-line options at build
940 time by entering them here. As a minimum, you should specify the
941 memory size and the root device (e.g., mem=64M root=/dev/nfs).
944 bool "Kernel Execute-In-Place from ROM"
945 depends on !ZBOOT_ROM
947 Execute-In-Place allows the kernel to run from non-volatile storage
948 directly addressable by the CPU, such as NOR flash. This saves RAM
949 space since the text section of the kernel is not loaded from flash
950 to RAM. Read-write sections, such as the data section and stack,
951 are still copied to RAM. The XIP kernel is not compressed since
952 it has to run directly from flash, so it will take more space to
953 store it. The flash address used to link the kernel object files,
954 and for storing it, is configuration dependent. Therefore, if you
955 say Y here, you must know the proper physical address where to
956 store the kernel image depending on your own flash memory usage.
958 Also note that the make target becomes "make xipImage" rather than
959 "make zImage" or "make Image". The final kernel binary to put in
960 ROM memory will be arch/arm/boot/xipImage.
965 hex "XIP Kernel Physical Location"
966 depends on XIP_KERNEL
969 This is the physical address in your flash memory the kernel will
970 be linked for and stored to. This address is dependent on your
974 bool "Kexec system call (EXPERIMENTAL)"
975 depends on EXPERIMENTAL
977 kexec is a system call that implements the ability to shutdown your
978 current kernel, and to start another kernel. It is like a reboot
979 but it is independent of the system firmware. And like a reboot
980 you can start any kernel with it, not just Linux.
982 It is an ongoing process to be certain the hardware in a machine
983 is properly shutdown, so do not be surprised if this code does not
984 initially work for you. It may help to enable device hotplugging
988 bool "Export atags in procfs"
992 Should the atags used to boot the kernel be exported in an "atags"
993 file in procfs. Useful with kexec.
997 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
999 menu "CPU Frequency scaling"
1001 source "drivers/cpufreq/Kconfig"
1003 config CPU_FREQ_SA1100
1005 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1008 config CPU_FREQ_SA1110
1010 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1013 config CPU_FREQ_INTEGRATOR
1014 tristate "CPUfreq driver for ARM Integrator CPUs"
1015 depends on ARCH_INTEGRATOR && CPU_FREQ
1018 This enables the CPUfreq driver for ARM Integrator CPUs.
1020 For details, take a look at <file:Documentation/cpu-freq>.
1025 tristate "CPUfreq driver for i.MX CPUs"
1026 depends on ARCH_IMX && CPU_FREQ
1029 This enables the CPUfreq driver for i.MX CPUs.
1035 depends on CPU_FREQ && ARCH_PXA && PXA25x
1037 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1043 menu "Floating point emulation"
1045 comment "At least one emulation must be selected"
1048 bool "NWFPE math emulation"
1049 depends on !AEABI || OABI_COMPAT
1051 Say Y to include the NWFPE floating point emulator in the kernel.
1052 This is necessary to run most binaries. Linux does not currently
1053 support floating point hardware so you need to say Y here even if
1054 your machine has an FPA or floating point co-processor podule.
1056 You may say N here if you are going to load the Acorn FPEmulator
1057 early in the bootup.
1060 bool "Support extended precision"
1061 depends on FPE_NWFPE
1063 Say Y to include 80-bit support in the kernel floating-point
1064 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1065 Note that gcc does not generate 80-bit operations by default,
1066 so in most cases this option only enlarges the size of the
1067 floating point emulator without any good reason.
1069 You almost surely want to say N here.
1072 bool "FastFPE math emulation (EXPERIMENTAL)"
1073 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1075 Say Y here to include the FAST floating point emulator in the kernel.
1076 This is an experimental much faster emulator which now also has full
1077 precision for the mantissa. It does not support any exceptions.
1078 It is very simple, and approximately 3-6 times faster than NWFPE.
1080 It should be sufficient for most programs. It may be not suitable
1081 for scientific calculations, but you have to check this for yourself.
1082 If you do not feel you need a faster FP emulation you should better
1086 bool "VFP-format floating point maths"
1087 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1089 Say Y to include VFP support code in the kernel. This is needed
1090 if your hardware includes a VFP unit.
1092 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1093 release notes and additional status information.
1095 Say N if your target does not have VFP hardware.
1103 bool "Advanced SIMD (NEON) Extension support"
1104 depends on VFPv3 && CPU_V7
1106 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1111 menu "Userspace binary formats"
1113 source "fs/Kconfig.binfmt"
1116 tristate "RISC OS personality"
1119 Say Y here to include the kernel code necessary if you want to run
1120 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1121 experimental; if this sounds frightening, say N and sleep in peace.
1122 You can also say M here to compile this support as a module (which
1123 will be called arthur).
1127 menu "Power management options"
1129 source "kernel/power/Kconfig"
1131 config ARCH_SUSPEND_POSSIBLE
1136 source "net/Kconfig"
1138 menu "Device Drivers"
1140 source "drivers/base/Kconfig"
1142 source "drivers/connector/Kconfig"
1144 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1145 source "drivers/mtd/Kconfig"
1148 source "drivers/parport/Kconfig"
1150 source "drivers/pnp/Kconfig"
1152 source "drivers/block/Kconfig"
1154 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1156 source "drivers/misc/Kconfig"
1158 source "drivers/ide/Kconfig"
1160 source "drivers/scsi/Kconfig"
1162 source "drivers/ata/Kconfig"
1164 source "drivers/md/Kconfig"
1166 source "drivers/message/fusion/Kconfig"
1168 source "drivers/ieee1394/Kconfig"
1170 source "drivers/message/i2o/Kconfig"
1172 source "drivers/net/Kconfig"
1174 source "drivers/isdn/Kconfig"
1176 # input before char - char/joystick depends on it. As does USB.
1178 source "drivers/input/Kconfig"
1180 source "drivers/char/Kconfig"
1182 source "drivers/i2c/Kconfig"
1184 source "drivers/spi/Kconfig"
1186 source "drivers/gpio/Kconfig"
1188 source "drivers/w1/Kconfig"
1190 source "drivers/power/Kconfig"
1192 source "drivers/hwmon/Kconfig"
1194 source "drivers/watchdog/Kconfig"
1196 source "drivers/ssb/Kconfig"
1198 #source "drivers/l3/Kconfig"
1200 source "drivers/mfd/Kconfig"
1202 source "drivers/media/Kconfig"
1204 source "drivers/video/Kconfig"
1206 source "sound/Kconfig"
1208 source "drivers/hid/Kconfig"
1210 source "drivers/usb/Kconfig"
1212 source "drivers/mmc/Kconfig"
1214 source "drivers/leds/Kconfig"
1216 source "drivers/rtc/Kconfig"
1218 source "drivers/dma/Kconfig"
1220 source "drivers/dca/Kconfig"
1222 source "drivers/uio/Kconfig"
1228 source "arch/arm/Kconfig.debug"
1230 source "security/Kconfig"
1232 source "crypto/Kconfig"
1234 source "lib/Kconfig"