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_FTRACE if (!XIP_KERNEL)
20 select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
21 select HAVE_GENERIC_DMA_COHERENT
23 The ARM series is a line of low-power-consumption RISC chip designs
24 licensed by ARM Ltd and targeted at embedded applications and
25 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
26 manufactured, but legacy ARM-based PC hardware remains popular in
27 Europe. There is an ARM Linux project with a web page at
28 <http://www.arm.linux.org.uk/>.
33 config SYS_SUPPORTS_APM_EMULATION
44 config GENERIC_CLOCKEVENTS
48 config GENERIC_CLOCKEVENTS_BROADCAST
50 depends on GENERIC_CLOCKEVENTS
51 default y if SMP && !LOCAL_TIMERS
64 The Extended Industry Standard Architecture (EISA) bus was
65 developed as an open alternative to the IBM MicroChannel bus.
67 The EISA bus provided some of the features of the IBM MicroChannel
68 bus while maintaining backward compatibility with cards made for
69 the older ISA bus. The EISA bus saw limited use between 1988 and
70 1995 when it was made obsolete by the PCI bus.
72 Say Y here if you are building a kernel for an EISA-based machine.
82 MicroChannel Architecture is found in some IBM PS/2 machines and
83 laptops. It is a bus system similar to PCI or ISA. See
84 <file:Documentation/mca.txt> (and especially the web page given
85 there) before attempting to build an MCA bus kernel.
87 config GENERIC_HARDIRQS
91 config STACKTRACE_SUPPORT
95 config HAVE_LATENCYTOP_SUPPORT
100 config LOCKDEP_SUPPORT
104 config TRACE_IRQFLAGS_SUPPORT
108 config HARDIRQS_SW_RESEND
112 config GENERIC_IRQ_PROBE
116 config GENERIC_LOCKBREAK
119 depends on SMP && PREEMPT
121 config RWSEM_GENERIC_SPINLOCK
125 config RWSEM_XCHGADD_ALGORITHM
128 config ARCH_HAS_ILOG2_U32
132 config ARCH_HAS_ILOG2_U64
136 config GENERIC_HWEIGHT
140 config GENERIC_CALIBRATE_DELAY
144 config ARCH_MAY_HAVE_PC_FDC
151 config GENERIC_ISA_DMA
160 config GENERIC_HARDIRQS_NO__DO_IRQ
166 config OPROFILE_ARMV6
168 depends on CPU_V6 && !SMP
169 select OPROFILE_ARM11_CORE
171 config OPROFILE_MPCORE
173 depends on CPU_V6 && SMP
174 select OPROFILE_ARM11_CORE
176 config OPROFILE_ARM11_CORE
183 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
184 default DRAM_BASE if REMAP_VECTORS_TO_RAM
187 The base address of exception vectors.
189 source "init/Kconfig"
194 prompt "ARM system type"
195 default ARCH_VERSATILE
198 bool "Agilent AAEC-2000 based"
202 This enables support for systems based on the Agilent AAEC-2000
204 config ARCH_INTEGRATOR
205 bool "ARM Ltd. Integrator family"
210 Support for ARM's Integrator platform.
213 bool "ARM Ltd. RealView family"
218 select GENERIC_CLOCKEVENTS
220 This enables support for ARM Ltd RealView boards.
222 config ARCH_VERSATILE
223 bool "ARM Ltd. Versatile family"
229 select GENERIC_CLOCKEVENTS
231 This enables support for ARM Ltd Versatile board.
238 This enables support for systems based on the Atmel AT91RM9200,
239 AT91SAM9 and AT91CAP9 processors.
242 bool "Cirrus CL-PS7500FE"
247 Support for the Cirrus Logic PS7500FE system-on-a-chip.
250 bool "Cirrus Logic CLPS711x/EP721x-based"
252 Support for Cirrus Logic 711x/721x based boards.
259 This is an evaluation board for the StrongARM processor available
260 from Digital. It has limited hardware on-board, including an
261 Ethernet interface, two PCMCIA sockets, two serial ports and a
270 select ARCH_REQUIRE_GPIOLIB
272 This enables support for the Cirrus EP93xx series of CPUs.
274 config ARCH_FOOTBRIDGE
278 Support for systems based on the DC21285 companion chip
279 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
282 bool "Hilscher NetX based"
285 This enables support for systems based on the Hilscher NetX Soc
288 bool "Hynix HMS720x-based"
291 This enables support for systems based on the Hynix HMS720x
297 select GENERIC_CLOCKEVENTS
299 Support for Motorola's i.MX family of processors (MX1, MXL).
306 select ARCH_SUPPORTS_MSI
308 Support for Intel's IOP13XX (XScale) family of processors.
316 select ARCH_REQUIRE_GPIOLIB
318 Support for Intel's 80219 and IOP32X (XScale) family of
327 select ARCH_REQUIRE_GPIOLIB
329 Support for Intel's IOP33X (XScale) family of processors.
336 Support for Intel's IXP23xx (XScale) family of processors.
339 bool "IXP2400/2800-based"
343 Support for Intel's IXP2400/2800 (XScale) family of processors.
350 select GENERIC_CLOCKEVENTS
352 Support for Intel's IXP4XX (XScale) family of processors.
358 Say Y here if you intend to run this kernel on a LinkUp Systems
359 L7200 Software Development Board which uses an ARM720T processor.
360 Information on this board can be obtained at:
362 <http://www.linkupsys.com/>
364 If you have any questions or comments about the Linux kernel port
365 to this board, send e-mail to <sjhill@cotw.com>.
368 bool "Marvell Kirkwood"
371 select GENERIC_CLOCKEVENTS
374 Support for the following Marvell Kirkwood series SoCs:
375 88F6180, 88F6192 and 88F6281.
378 bool "Micrel/Kendin KS8695"
381 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
382 System-on-Chip devices.
385 bool "NetSilicon NS9xxx"
388 select GENERIC_CLOCKEVENTS
391 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
394 <http://www.digi.com/products/microprocessors/index.jsp>
397 bool "Marvell Loki (88RC8480)"
399 select GENERIC_CLOCKEVENTS
402 Support for the Marvell Loki (88RC8480) SoC.
405 bool "Marvell MV78xx0"
408 select GENERIC_CLOCKEVENTS
411 Support for the following Marvell MV78xx0 series SoCs:
415 bool "Freescale MXC/iMX-based"
417 select GENERIC_CLOCKEVENTS
420 select ARCH_REQUIRE_GPIOLIB
422 Support for Freescale MXC/iMX-based family of processors
430 select GENERIC_CLOCKEVENTS
433 Support for the following Marvell Orion 5x series SoCs:
434 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
438 bool "Philips Nexperia PNX4008 Mobile"
441 This enables support for Philips PNX4008 mobile platform.
444 bool "PXA2xx/PXA3xx-based"
449 select ARCH_REQUIRE_GPIOLIB
451 select GENERIC_CLOCKEVENTS
454 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
461 select ARCH_MAY_HAVE_PC_FDC
462 select HAVE_PATA_PLATFORM
466 On the Acorn Risc-PC, Linux can support the internal IDE disk and
467 CD-ROM interface, serial and parallel port, and the floppy drive.
472 select ARCH_DISCONTIGMEM_ENABLE
473 select ARCH_SPARSEMEM_ENABLE
474 select ARCH_SELECT_MEMORY_MODEL
478 select GENERIC_CLOCKEVENTS
481 select ARCH_REQUIRE_GPIOLIB
483 Support for StrongARM 11x0 based boards.
486 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
490 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
491 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
492 the Samsung SMDK2410 development board (and derivatives).
500 Support for the StrongARM based Digital DNARD machine, also known
501 as "Shark" (<http://www.shark-linux.de/shark.html>).
506 Say Y here for systems based on one of the Sharp LH7A40X
507 System on a Chip processors. These CPUs include an ARM922T
508 core with a wide array of integrated devices for
509 hand-held and low-power applications.
514 select GENERIC_CLOCKEVENTS
518 Support for TI's DaVinci platform.
524 select ARCH_REQUIRE_GPIOLIB
526 select GENERIC_CLOCKEVENTS
528 Support for TI's OMAP platform (OMAP1 and OMAP2).
531 bool "Qualcomm MSM7X00A"
533 select GENERIC_CLOCKEVENTS
535 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
536 apps processor of the MSM7X00A and depends on a shared memory
537 interface to the ARM9 modem processor which runs the baseband stack
538 and controls some vital subsystems (clock and power control, etc).
539 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
543 source "arch/arm/mach-clps711x/Kconfig"
545 source "arch/arm/mach-ep93xx/Kconfig"
547 source "arch/arm/mach-footbridge/Kconfig"
549 source "arch/arm/mach-integrator/Kconfig"
551 source "arch/arm/mach-iop32x/Kconfig"
553 source "arch/arm/mach-iop33x/Kconfig"
555 source "arch/arm/mach-iop13xx/Kconfig"
557 source "arch/arm/mach-ixp4xx/Kconfig"
559 source "arch/arm/mach-ixp2000/Kconfig"
561 source "arch/arm/mach-ixp23xx/Kconfig"
563 source "arch/arm/mach-loki/Kconfig"
565 source "arch/arm/mach-mv78xx0/Kconfig"
567 source "arch/arm/mach-pxa/Kconfig"
569 source "arch/arm/mach-sa1100/Kconfig"
571 source "arch/arm/plat-omap/Kconfig"
573 source "arch/arm/mach-omap1/Kconfig"
575 source "arch/arm/mach-omap2/Kconfig"
577 source "arch/arm/mach-orion5x/Kconfig"
579 source "arch/arm/mach-kirkwood/Kconfig"
581 source "arch/arm/plat-s3c24xx/Kconfig"
582 source "arch/arm/plat-s3c/Kconfig"
585 source "arch/arm/mach-s3c2400/Kconfig"
586 source "arch/arm/mach-s3c2410/Kconfig"
587 source "arch/arm/mach-s3c2412/Kconfig"
588 source "arch/arm/mach-s3c2440/Kconfig"
589 source "arch/arm/mach-s3c2442/Kconfig"
590 source "arch/arm/mach-s3c2443/Kconfig"
593 source "arch/arm/mach-lh7a40x/Kconfig"
595 source "arch/arm/mach-imx/Kconfig"
597 source "arch/arm/mach-h720x/Kconfig"
599 source "arch/arm/mach-versatile/Kconfig"
601 source "arch/arm/mach-aaec2000/Kconfig"
603 source "arch/arm/mach-realview/Kconfig"
605 source "arch/arm/mach-at91/Kconfig"
607 source "arch/arm/plat-mxc/Kconfig"
609 source "arch/arm/mach-netx/Kconfig"
611 source "arch/arm/mach-ns9xxx/Kconfig"
613 source "arch/arm/mach-davinci/Kconfig"
615 source "arch/arm/mach-ks8695/Kconfig"
617 source "arch/arm/mach-msm/Kconfig"
619 # Definitions to make life easier
629 source arch/arm/mm/Kconfig
632 bool "Enable iWMMXt support"
633 depends on CPU_XSCALE || CPU_XSC3
634 default y if PXA27x || PXA3xx
636 Enable support for iWMMXt context switching at run time if
637 running on a CPU that supports it.
639 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
642 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
646 source "arch/arm/Kconfig-nommu"
651 source "arch/arm/common/Kconfig"
653 config FORCE_MAX_ZONEORDER
666 Find out whether you have ISA slots on your motherboard. ISA is the
667 name of a bus system, i.e. the way the CPU talks to the other stuff
668 inside your box. Other bus systems are PCI, EISA, MicroChannel
669 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
670 newer boards don't support it. If you have ISA, say Y, otherwise N.
672 # Select ISA DMA controller support
677 # Select ISA DMA interface
682 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
684 Find out whether you have a PCI motherboard. PCI is the name of a
685 bus system, i.e. the way the CPU talks to the other stuff inside
686 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
687 VESA. If you have PCI, say Y, otherwise N.
692 # Select the host bridge type
693 config PCI_HOST_VIA82C505
695 depends on PCI && ARCH_SHARK
698 config PCI_HOST_ITE8152
700 depends on PCI && MACH_ARMCORE
704 source "drivers/pci/Kconfig"
706 source "drivers/pcmcia/Kconfig"
710 menu "Kernel Features"
712 source "kernel/time/Kconfig"
715 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
716 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
717 select USE_GENERIC_SMP_HELPERS
719 This enables support for systems with more than one CPU. If you have
720 a system with only one CPU, like most personal computers, say N. If
721 you have a system with more than one CPU, say Y.
723 If you say N here, the kernel will run on single and multiprocessor
724 machines, but will use only one CPU of a multiprocessor machine. If
725 you say Y here, the kernel will run on many, but not all, single
726 processor machines. On a single processor machine, the kernel will
727 run faster if you say N here.
729 See also <file:Documentation/i386/IO-APIC.txt>,
730 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
731 <http://www.linuxdoc.org/docs.html#howto>.
733 If you don't know what to do here, say N.
736 int "Maximum number of CPUs (2-32)"
742 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
743 depends on SMP && HOTPLUG && EXPERIMENTAL
745 Say Y here to experiment with turning CPUs off and on. CPUs
746 can be controlled through /sys/devices/system/cpu.
749 bool "Use local timer interrupts"
750 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
753 Enable support for local timers on SMP platforms, rather then the
754 legacy IPI broadcast method. Local timers allows the system
755 accounting to be spread across the timer interval, preventing a
756 "thundering herd" at every timer tick.
759 bool "Preemptible Kernel (EXPERIMENTAL)"
760 depends on EXPERIMENTAL
762 This option reduces the latency of the kernel when reacting to
763 real-time or interactive events by allowing a low priority process to
764 be preempted even if it is in kernel mode executing a system call.
765 This allows applications to run more reliably even when the system is
768 Say Y here if you are building a kernel for a desktop, embedded
769 or real-time system. Say N if you are unsure.
773 default 128 if ARCH_L7200
774 default 200 if ARCH_EBSA110 || ARCH_S3C2410
775 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
776 default AT91_TIMER_HZ if ARCH_AT91
780 bool "Use the ARM EABI to compile the kernel"
782 This option allows for the kernel to be compiled using the latest
783 ARM ABI (aka EABI). This is only useful if you are using a user
784 space environment that is also compiled with EABI.
786 Since there are major incompatibilities between the legacy ABI and
787 EABI, especially with regard to structure member alignment, this
788 option also changes the kernel syscall calling convention to
789 disambiguate both ABIs and allow for backward compatibility support
790 (selected with CONFIG_OABI_COMPAT).
792 To use this you need GCC version 4.0.0 or later.
795 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
796 depends on AEABI && EXPERIMENTAL
799 This option preserves the old syscall interface along with the
800 new (ARM EABI) one. It also provides a compatibility layer to
801 intercept syscalls that have structure arguments which layout
802 in memory differs between the legacy ABI and the new ARM EABI
803 (only for non "thumb" binaries). This option adds a tiny
804 overhead to all syscalls and produces a slightly larger kernel.
805 If you know you'll be using only pure EABI user space then you
806 can say N here. If this option is not selected and you attempt
807 to execute a legacy ABI binary then the result will be
808 UNPREDICTABLE (in fact it can be predicted that it won't work
809 at all). If in doubt say Y.
811 config ARCH_FLATMEM_HAS_HOLES
816 config ARCH_DISCONTIGMEM_ENABLE
818 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
820 Say Y to support efficient handling of discontiguous physical memory,
821 for architectures which are either NUMA (Non-Uniform Memory Access)
822 or have huge holes in the physical address space for other reasons.
823 See <file:Documentation/vm/numa> for more.
825 config ARCH_SPARSEMEM_ENABLE
828 config ARCH_SELECT_MEMORY_MODEL
833 default "4" if ARCH_LH7A40X
835 depends on NEED_MULTIPLE_NODES
840 bool "Timer and CPU usage LEDs"
841 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
842 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
843 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
844 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
845 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
846 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
847 ARCH_KS8695 || MACH_RD88F5182
849 If you say Y here, the LEDs on your machine will be used
850 to provide useful information about your current system status.
852 If you are compiling a kernel for a NetWinder or EBSA-285, you will
853 be able to select which LEDs are active using the options below. If
854 you are compiling a kernel for the EBSA-110 or the LART however, the
855 red LED will simply flash regularly to indicate that the system is
856 still functional. It is safe to say Y here if you have a CATS
857 system, but the driver will do nothing.
860 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
861 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
862 || MACH_OMAP_PERSEUS2
864 depends on !GENERIC_CLOCKEVENTS
865 default y if ARCH_EBSA110
867 If you say Y here, one of the system LEDs (the green one on the
868 NetWinder, the amber one on the EBSA285, or the red one on the LART)
869 will flash regularly to indicate that the system is still
870 operational. This is mainly useful to kernel hackers who are
871 debugging unstable kernels.
873 The LART uses the same LED for both Timer LED and CPU usage LED
874 functions. You may choose to use both, but the Timer LED function
875 will overrule the CPU usage LED.
878 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
880 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
881 || MACH_OMAP_PERSEUS2
884 If you say Y here, the red LED will be used to give a good real
885 time indication of CPU usage, by lighting whenever the idle task
886 is not currently executing.
888 The LART uses the same LED for both Timer LED and CPU usage LED
889 functions. You may choose to use both, but the Timer LED function
890 will overrule the CPU usage LED.
892 config ALIGNMENT_TRAP
894 depends on CPU_CP15_MMU
895 default y if !ARCH_EBSA110
897 ARM processors cannot fetch/store information which is not
898 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
899 address divisible by 4. On 32-bit ARM processors, these non-aligned
900 fetch/store instructions will be emulated in software if you say
901 here, which has a severe performance impact. This is necessary for
902 correct operation of some network protocols. With an IP-only
903 configuration it is safe to say N, otherwise say Y.
909 # Compressed boot loader in ROM. Yes, we really want to ask about
910 # TEXT and BSS so we preserve their values in the config files.
911 config ZBOOT_ROM_TEXT
912 hex "Compressed ROM boot loader base address"
915 The physical address at which the ROM-able zImage is to be
916 placed in the target. Platforms which normally make use of
917 ROM-able zImage formats normally set this to a suitable
918 value in their defconfig file.
920 If ZBOOT_ROM is not enabled, this has no effect.
923 hex "Compressed ROM boot loader BSS address"
926 The base address of an area of read/write memory in the target
927 for the ROM-able zImage which must be available while the
928 decompressor is running. It must be large enough to hold the
929 entire decompressed kernel plus an additional 128 KiB.
930 Platforms which normally make use of ROM-able zImage formats
931 normally set this to a suitable value in their defconfig file.
933 If ZBOOT_ROM is not enabled, this has no effect.
936 bool "Compressed boot loader in ROM/flash"
937 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
939 Say Y here if you intend to execute your compressed kernel image
940 (zImage) directly from ROM or flash. If unsure, say N.
943 string "Default kernel command string"
946 On some architectures (EBSA110 and CATS), there is currently no way
947 for the boot loader to pass arguments to the kernel. For these
948 architectures, you should supply some command-line options at build
949 time by entering them here. As a minimum, you should specify the
950 memory size and the root device (e.g., mem=64M root=/dev/nfs).
953 bool "Kernel Execute-In-Place from ROM"
954 depends on !ZBOOT_ROM
956 Execute-In-Place allows the kernel to run from non-volatile storage
957 directly addressable by the CPU, such as NOR flash. This saves RAM
958 space since the text section of the kernel is not loaded from flash
959 to RAM. Read-write sections, such as the data section and stack,
960 are still copied to RAM. The XIP kernel is not compressed since
961 it has to run directly from flash, so it will take more space to
962 store it. The flash address used to link the kernel object files,
963 and for storing it, is configuration dependent. Therefore, if you
964 say Y here, you must know the proper physical address where to
965 store the kernel image depending on your own flash memory usage.
967 Also note that the make target becomes "make xipImage" rather than
968 "make zImage" or "make Image". The final kernel binary to put in
969 ROM memory will be arch/arm/boot/xipImage.
974 hex "XIP Kernel Physical Location"
975 depends on XIP_KERNEL
978 This is the physical address in your flash memory the kernel will
979 be linked for and stored to. This address is dependent on your
983 bool "Kexec system call (EXPERIMENTAL)"
984 depends on EXPERIMENTAL
986 kexec is a system call that implements the ability to shutdown your
987 current kernel, and to start another kernel. It is like a reboot
988 but it is independent of the system firmware. And like a reboot
989 you can start any kernel with it, not just Linux.
991 It is an ongoing process to be certain the hardware in a machine
992 is properly shutdown, so do not be surprised if this code does not
993 initially work for you. It may help to enable device hotplugging
997 bool "Export atags in procfs"
1001 Should the atags used to boot the kernel be exported in an "atags"
1002 file in procfs. Useful with kexec.
1006 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1008 menu "CPU Frequency scaling"
1010 source "drivers/cpufreq/Kconfig"
1012 config CPU_FREQ_SA1100
1014 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1017 config CPU_FREQ_SA1110
1019 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1022 config CPU_FREQ_INTEGRATOR
1023 tristate "CPUfreq driver for ARM Integrator CPUs"
1024 depends on ARCH_INTEGRATOR && CPU_FREQ
1027 This enables the CPUfreq driver for ARM Integrator CPUs.
1029 For details, take a look at <file:Documentation/cpu-freq>.
1034 tristate "CPUfreq driver for i.MX CPUs"
1035 depends on ARCH_IMX && CPU_FREQ
1038 This enables the CPUfreq driver for i.MX CPUs.
1044 depends on CPU_FREQ && ARCH_PXA && PXA25x
1046 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1052 menu "Floating point emulation"
1054 comment "At least one emulation must be selected"
1057 bool "NWFPE math emulation"
1058 depends on !AEABI || OABI_COMPAT
1060 Say Y to include the NWFPE floating point emulator in the kernel.
1061 This is necessary to run most binaries. Linux does not currently
1062 support floating point hardware so you need to say Y here even if
1063 your machine has an FPA or floating point co-processor podule.
1065 You may say N here if you are going to load the Acorn FPEmulator
1066 early in the bootup.
1069 bool "Support extended precision"
1070 depends on FPE_NWFPE
1072 Say Y to include 80-bit support in the kernel floating-point
1073 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1074 Note that gcc does not generate 80-bit operations by default,
1075 so in most cases this option only enlarges the size of the
1076 floating point emulator without any good reason.
1078 You almost surely want to say N here.
1081 bool "FastFPE math emulation (EXPERIMENTAL)"
1082 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1084 Say Y here to include the FAST floating point emulator in the kernel.
1085 This is an experimental much faster emulator which now also has full
1086 precision for the mantissa. It does not support any exceptions.
1087 It is very simple, and approximately 3-6 times faster than NWFPE.
1089 It should be sufficient for most programs. It may be not suitable
1090 for scientific calculations, but you have to check this for yourself.
1091 If you do not feel you need a faster FP emulation you should better
1095 bool "VFP-format floating point maths"
1096 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1098 Say Y to include VFP support code in the kernel. This is needed
1099 if your hardware includes a VFP unit.
1101 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1102 release notes and additional status information.
1104 Say N if your target does not have VFP hardware.
1112 bool "Advanced SIMD (NEON) Extension support"
1113 depends on VFPv3 && CPU_V7
1115 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1120 menu "Userspace binary formats"
1122 source "fs/Kconfig.binfmt"
1125 tristate "RISC OS personality"
1128 Say Y here to include the kernel code necessary if you want to run
1129 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1130 experimental; if this sounds frightening, say N and sleep in peace.
1131 You can also say M here to compile this support as a module (which
1132 will be called arthur).
1136 menu "Power management options"
1138 source "kernel/power/Kconfig"
1140 config ARCH_SUSPEND_POSSIBLE
1145 source "net/Kconfig"
1147 menu "Device Drivers"
1149 source "drivers/base/Kconfig"
1151 source "drivers/connector/Kconfig"
1153 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1154 source "drivers/mtd/Kconfig"
1157 source "drivers/parport/Kconfig"
1159 source "drivers/pnp/Kconfig"
1161 source "drivers/block/Kconfig"
1163 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1165 source "drivers/misc/Kconfig"
1167 source "drivers/ide/Kconfig"
1169 source "drivers/scsi/Kconfig"
1171 source "drivers/ata/Kconfig"
1173 source "drivers/md/Kconfig"
1175 source "drivers/message/fusion/Kconfig"
1177 source "drivers/ieee1394/Kconfig"
1179 source "drivers/message/i2o/Kconfig"
1181 source "drivers/net/Kconfig"
1183 source "drivers/isdn/Kconfig"
1185 # input before char - char/joystick depends on it. As does USB.
1187 source "drivers/input/Kconfig"
1189 source "drivers/char/Kconfig"
1191 source "drivers/i2c/Kconfig"
1193 source "drivers/spi/Kconfig"
1195 source "drivers/gpio/Kconfig"
1197 source "drivers/w1/Kconfig"
1199 source "drivers/power/Kconfig"
1201 source "drivers/hwmon/Kconfig"
1203 source "drivers/watchdog/Kconfig"
1205 source "drivers/ssb/Kconfig"
1207 #source "drivers/l3/Kconfig"
1209 source "drivers/mfd/Kconfig"
1211 source "drivers/media/Kconfig"
1213 source "drivers/video/Kconfig"
1215 source "sound/Kconfig"
1217 source "drivers/hid/Kconfig"
1219 source "drivers/usb/Kconfig"
1221 source "drivers/mmc/Kconfig"
1223 source "drivers/leds/Kconfig"
1225 source "drivers/rtc/Kconfig"
1227 source "drivers/dma/Kconfig"
1229 source "drivers/dca/Kconfig"
1231 source "drivers/regulator/Kconfig"
1233 source "drivers/uio/Kconfig"
1239 source "arch/arm/Kconfig.debug"
1241 source "security/Kconfig"
1243 source "crypto/Kconfig"
1245 source "lib/Kconfig"