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
16 select HAVE_KPROBES if (!XIP_KERNEL)
17 select HAVE_KRETPROBES if (HAVE_KPROBES)
18 select HAVE_FTRACE if (!XIP_KERNEL)
19 select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
21 The ARM series is a line of low-power-consumption RISC chip designs
22 licensed by ARM Ltd and targeted at embedded applications and
23 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
24 manufactured, but legacy ARM-based PC hardware remains popular in
25 Europe. There is an ARM Linux project with a web page at
26 <http://www.arm.linux.org.uk/>.
31 config SYS_SUPPORTS_APM_EMULATION
42 config GENERIC_CLOCKEVENTS
46 config GENERIC_CLOCKEVENTS_BROADCAST
48 depends on GENERIC_CLOCKEVENTS
49 default y if SMP && !LOCAL_TIMERS
62 The Extended Industry Standard Architecture (EISA) bus was
63 developed as an open alternative to the IBM MicroChannel bus.
65 The EISA bus provided some of the features of the IBM MicroChannel
66 bus while maintaining backward compatibility with cards made for
67 the older ISA bus. The EISA bus saw limited use between 1988 and
68 1995 when it was made obsolete by the PCI bus.
70 Say Y here if you are building a kernel for an EISA-based machine.
80 MicroChannel Architecture is found in some IBM PS/2 machines and
81 laptops. It is a bus system similar to PCI or ISA. See
82 <file:Documentation/mca.txt> (and especially the web page given
83 there) before attempting to build an MCA bus kernel.
85 config GENERIC_HARDIRQS
89 config STACKTRACE_SUPPORT
93 config HAVE_LATENCYTOP_SUPPORT
98 config LOCKDEP_SUPPORT
102 config TRACE_IRQFLAGS_SUPPORT
106 config HARDIRQS_SW_RESEND
110 config GENERIC_IRQ_PROBE
114 config GENERIC_LOCKBREAK
117 depends on SMP && PREEMPT
119 config RWSEM_GENERIC_SPINLOCK
123 config RWSEM_XCHGADD_ALGORITHM
126 config ARCH_HAS_ILOG2_U32
130 config ARCH_HAS_ILOG2_U64
134 config GENERIC_HWEIGHT
138 config GENERIC_CALIBRATE_DELAY
142 config ARCH_SUPPORTS_AOUT
145 config ARCH_MAY_HAVE_PC_FDC
152 config GENERIC_ISA_DMA
161 config GENERIC_HARDIRQS_NO__DO_IRQ
167 config OPROFILE_ARMV6
169 depends on CPU_V6 && !SMP
170 select OPROFILE_ARM11_CORE
172 config OPROFILE_MPCORE
174 depends on CPU_V6 && SMP
175 select OPROFILE_ARM11_CORE
177 config OPROFILE_ARM11_CORE
184 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
185 default DRAM_BASE if REMAP_VECTORS_TO_RAM
188 The base address of exception vectors.
190 source "init/Kconfig"
195 prompt "ARM system type"
196 default ARCH_VERSATILE
199 bool "Agilent AAEC-2000 based"
203 This enables support for systems based on the Agilent AAEC-2000
205 config ARCH_INTEGRATOR
206 bool "ARM Ltd. Integrator family"
211 Support for ARM's Integrator platform.
214 bool "ARM Ltd. RealView family"
219 select GENERIC_CLOCKEVENTS
221 This enables support for ARM Ltd RealView boards.
223 config ARCH_VERSATILE
224 bool "ARM Ltd. Versatile family"
230 select GENERIC_CLOCKEVENTS
232 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
271 select ARCH_REQUIRE_GPIOLIB
273 This enables support for the Cirrus EP93xx series of CPUs.
275 config ARCH_FOOTBRIDGE
279 Support for systems based on the DC21285 companion chip
280 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
283 bool "Hilscher NetX based"
286 This enables support for systems based on the Hilscher NetX Soc
289 bool "Hynix HMS720x-based"
292 This enables support for systems based on the Hynix HMS720x
298 select GENERIC_CLOCKEVENTS
300 Support for Motorola's i.MX family of processors (MX1, MXL).
307 select ARCH_SUPPORTS_MSI
309 Support for Intel's IOP13XX (XScale) family of processors.
319 Support for Intel's 80219 and IOP32X (XScale) family of
330 Support for Intel's IOP33X (XScale) family of processors.
337 Support for Intel's IXP23xx (XScale) family of processors.
340 bool "IXP2400/2800-based"
344 Support for Intel's IXP2400/2800 (XScale) family of processors.
351 select GENERIC_CLOCKEVENTS
353 Support for Intel's IXP4XX (XScale) family of processors.
359 Say Y here if you intend to run this kernel on a LinkUp Systems
360 L7200 Software Development Board which uses an ARM720T processor.
361 Information on this board can be obtained at:
363 <http://www.linkupsys.com/>
365 If you have any questions or comments about the Linux kernel port
366 to this board, send e-mail to <sjhill@cotw.com>.
369 bool "Marvell Kirkwood"
372 select GENERIC_CLOCKEVENTS
375 Support for the following Marvell Kirkwood series SoCs:
376 88F6180, 88F6192 and 88F6281.
379 bool "Micrel/Kendin KS8695"
382 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
383 System-on-Chip devices.
386 bool "NetSilicon NS9xxx"
389 select GENERIC_CLOCKEVENTS
392 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
395 <http://www.digi.com/products/microprocessors/index.jsp>
398 bool "Marvell Loki (88RC8480)"
400 select GENERIC_CLOCKEVENTS
403 Support for the Marvell Loki (88RC8480) SoC.
406 bool "Marvell MV78xx0"
409 select GENERIC_CLOCKEVENTS
412 Support for the following Marvell MV78xx0 series SoCs:
416 bool "Freescale MXC/iMX-based"
418 select GENERIC_CLOCKEVENTS
423 Support for Freescale MXC/iMX-based family of processors
431 select GENERIC_CLOCKEVENTS
434 Support for the following Marvell Orion 5x series SoCs:
435 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
439 bool "Philips Nexperia PNX4008 Mobile"
442 This enables support for Philips PNX4008 mobile platform.
445 bool "PXA2xx/PXA3xx-based"
450 select ARCH_REQUIRE_GPIOLIB
452 select GENERIC_CLOCKEVENTS
455 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
462 select ARCH_MAY_HAVE_PC_FDC
463 select HAVE_PATA_PLATFORM
467 On the Acorn Risc-PC, Linux can support the internal IDE disk and
468 CD-ROM interface, serial and parallel port, and the floppy drive.
473 select ARCH_DISCONTIGMEM_ENABLE
474 select ARCH_SPARSEMEM_ENABLE
475 select ARCH_SELECT_MEMORY_MODEL
479 select GENERIC_CLOCKEVENTS
482 select ARCH_REQUIRE_GPIOLIB
484 Support for StrongARM 11x0 based boards.
487 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
491 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
492 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
493 the Samsung SMDK2410 development board (and derivatives).
501 Support for the StrongARM based Digital DNARD machine, also known
502 as "Shark" (<http://www.shark-linux.de/shark.html>).
507 Say Y here for systems based on one of the Sharp LH7A40X
508 System on a Chip processors. These CPUs include an ARM922T
509 core with a wide array of integrated devices for
510 hand-held and low-power applications.
515 select GENERIC_CLOCKEVENTS
519 Support for TI's DaVinci platform.
525 select ARCH_REQUIRE_GPIOLIB
527 select GENERIC_CLOCKEVENTS
529 Support for TI's OMAP platform (OMAP1 and OMAP2).
532 bool "Qualcomm MSM7X00A"
534 select GENERIC_CLOCKEVENTS
536 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
537 apps processor of the MSM7X00A and depends on a shared memory
538 interface to the ARM9 modem processor which runs the baseband stack
539 and controls some vital subsystems (clock and power control, etc).
540 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
544 source "arch/arm/mach-clps711x/Kconfig"
546 source "arch/arm/mach-ep93xx/Kconfig"
548 source "arch/arm/mach-footbridge/Kconfig"
550 source "arch/arm/mach-integrator/Kconfig"
552 source "arch/arm/mach-iop32x/Kconfig"
554 source "arch/arm/mach-iop33x/Kconfig"
556 source "arch/arm/mach-iop13xx/Kconfig"
558 source "arch/arm/mach-ixp4xx/Kconfig"
560 source "arch/arm/mach-ixp2000/Kconfig"
562 source "arch/arm/mach-ixp23xx/Kconfig"
564 source "arch/arm/mach-loki/Kconfig"
566 source "arch/arm/mach-mv78xx0/Kconfig"
568 source "arch/arm/mach-pxa/Kconfig"
570 source "arch/arm/mach-sa1100/Kconfig"
572 source "arch/arm/plat-omap/Kconfig"
574 source "arch/arm/mach-omap1/Kconfig"
576 source "arch/arm/mach-omap2/Kconfig"
578 source "arch/arm/mach-orion5x/Kconfig"
580 source "arch/arm/mach-kirkwood/Kconfig"
582 source "arch/arm/plat-s3c24xx/Kconfig"
583 source "arch/arm/plat-s3c/Kconfig"
586 source "arch/arm/mach-s3c2400/Kconfig"
587 source "arch/arm/mach-s3c2410/Kconfig"
588 source "arch/arm/mach-s3c2412/Kconfig"
589 source "arch/arm/mach-s3c2440/Kconfig"
590 source "arch/arm/mach-s3c2442/Kconfig"
591 source "arch/arm/mach-s3c2443/Kconfig"
594 source "arch/arm/mach-lh7a40x/Kconfig"
596 source "arch/arm/mach-imx/Kconfig"
598 source "arch/arm/mach-h720x/Kconfig"
600 source "arch/arm/mach-versatile/Kconfig"
602 source "arch/arm/mach-aaec2000/Kconfig"
604 source "arch/arm/mach-realview/Kconfig"
606 source "arch/arm/mach-at91/Kconfig"
608 source "arch/arm/plat-mxc/Kconfig"
610 source "arch/arm/mach-netx/Kconfig"
612 source "arch/arm/mach-ns9xxx/Kconfig"
614 source "arch/arm/mach-davinci/Kconfig"
616 source "arch/arm/mach-ks8695/Kconfig"
618 source "arch/arm/mach-msm/Kconfig"
620 # Definitions to make life easier
630 source arch/arm/mm/Kconfig
633 bool "Enable iWMMXt support"
634 depends on CPU_XSCALE || CPU_XSC3
635 default y if PXA27x || PXA3xx
637 Enable support for iWMMXt context switching at run time if
638 running on a CPU that supports it.
640 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
643 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
647 source "arch/arm/Kconfig-nommu"
652 source "arch/arm/common/Kconfig"
654 config FORCE_MAX_ZONEORDER
667 Find out whether you have ISA slots on your motherboard. ISA is the
668 name of a bus system, i.e. the way the CPU talks to the other stuff
669 inside your box. Other bus systems are PCI, EISA, MicroChannel
670 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
671 newer boards don't support it. If you have ISA, say Y, otherwise N.
673 # Select ISA DMA controller support
678 # Select ISA DMA interface
683 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
685 Find out whether you have a PCI motherboard. PCI is the name of a
686 bus system, i.e. the way the CPU talks to the other stuff inside
687 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
688 VESA. If you have PCI, say Y, otherwise N.
693 # Select the host bridge type
694 config PCI_HOST_VIA82C505
696 depends on PCI && ARCH_SHARK
699 config PCI_HOST_ITE8152
701 depends on PCI && MACH_ARMCORE
705 source "drivers/pci/Kconfig"
707 source "drivers/pcmcia/Kconfig"
711 menu "Kernel Features"
713 source "kernel/time/Kconfig"
716 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
717 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
718 select USE_GENERIC_SMP_HELPERS
720 This enables support for systems with more than one CPU. If you have
721 a system with only one CPU, like most personal computers, say N. If
722 you have a system with more than one CPU, say Y.
724 If you say N here, the kernel will run on single and multiprocessor
725 machines, but will use only one CPU of a multiprocessor machine. If
726 you say Y here, the kernel will run on many, but not all, single
727 processor machines. On a single processor machine, the kernel will
728 run faster if you say N here.
730 See also <file:Documentation/i386/IO-APIC.txt>,
731 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
732 <http://www.linuxdoc.org/docs.html#howto>.
734 If you don't know what to do here, say N.
737 int "Maximum number of CPUs (2-32)"
743 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
744 depends on SMP && HOTPLUG && EXPERIMENTAL
746 Say Y here to experiment with turning CPUs off and on. CPUs
747 can be controlled through /sys/devices/system/cpu.
750 bool "Use local timer interrupts"
751 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
754 Enable support for local timers on SMP platforms, rather then the
755 legacy IPI broadcast method. Local timers allows the system
756 accounting to be spread across the timer interval, preventing a
757 "thundering herd" at every timer tick.
760 bool "Preemptible Kernel (EXPERIMENTAL)"
761 depends on EXPERIMENTAL
763 This option reduces the latency of the kernel when reacting to
764 real-time or interactive events by allowing a low priority process to
765 be preempted even if it is in kernel mode executing a system call.
766 This allows applications to run more reliably even when the system is
769 Say Y here if you are building a kernel for a desktop, embedded
770 or real-time system. Say N if you are unsure.
774 default 128 if ARCH_L7200
775 default 200 if ARCH_EBSA110 || ARCH_S3C2410
776 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
777 default AT91_TIMER_HZ if ARCH_AT91
781 bool "Use the ARM EABI to compile the kernel"
783 This option allows for the kernel to be compiled using the latest
784 ARM ABI (aka EABI). This is only useful if you are using a user
785 space environment that is also compiled with EABI.
787 Since there are major incompatibilities between the legacy ABI and
788 EABI, especially with regard to structure member alignment, this
789 option also changes the kernel syscall calling convention to
790 disambiguate both ABIs and allow for backward compatibility support
791 (selected with CONFIG_OABI_COMPAT).
793 To use this you need GCC version 4.0.0 or later.
796 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
797 depends on AEABI && EXPERIMENTAL
800 This option preserves the old syscall interface along with the
801 new (ARM EABI) one. It also provides a compatibility layer to
802 intercept syscalls that have structure arguments which layout
803 in memory differs between the legacy ABI and the new ARM EABI
804 (only for non "thumb" binaries). This option adds a tiny
805 overhead to all syscalls and produces a slightly larger kernel.
806 If you know you'll be using only pure EABI user space then you
807 can say N here. If this option is not selected and you attempt
808 to execute a legacy ABI binary then the result will be
809 UNPREDICTABLE (in fact it can be predicted that it won't work
810 at all). If in doubt say Y.
812 config ARCH_DISCONTIGMEM_ENABLE
814 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
816 Say Y to support efficient handling of discontiguous physical memory,
817 for architectures which are either NUMA (Non-Uniform Memory Access)
818 or have huge holes in the physical address space for other reasons.
819 See <file:Documentation/vm/numa> for more.
821 config ARCH_SPARSEMEM_ENABLE
824 config ARCH_SELECT_MEMORY_MODEL
829 default "4" if ARCH_LH7A40X
831 depends on NEED_MULTIPLE_NODES
836 bool "Timer and CPU usage LEDs"
837 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
838 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
839 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
840 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
841 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
842 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
843 ARCH_KS8695 || MACH_RD88F5182
845 If you say Y here, the LEDs on your machine will be used
846 to provide useful information about your current system status.
848 If you are compiling a kernel for a NetWinder or EBSA-285, you will
849 be able to select which LEDs are active using the options below. If
850 you are compiling a kernel for the EBSA-110 or the LART however, the
851 red LED will simply flash regularly to indicate that the system is
852 still functional. It is safe to say Y here if you have a CATS
853 system, but the driver will do nothing.
856 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
857 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
858 || MACH_OMAP_PERSEUS2
860 depends on !GENERIC_CLOCKEVENTS
861 default y if ARCH_EBSA110
863 If you say Y here, one of the system LEDs (the green one on the
864 NetWinder, the amber one on the EBSA285, or the red one on the LART)
865 will flash regularly to indicate that the system is still
866 operational. This is mainly useful to kernel hackers who are
867 debugging unstable kernels.
869 The LART uses the same LED for both Timer LED and CPU usage LED
870 functions. You may choose to use both, but the Timer LED function
871 will overrule the CPU usage LED.
874 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
876 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
877 || MACH_OMAP_PERSEUS2
880 If you say Y here, the red LED will be used to give a good real
881 time indication of CPU usage, by lighting whenever the idle task
882 is not currently executing.
884 The LART uses the same LED for both Timer LED and CPU usage LED
885 functions. You may choose to use both, but the Timer LED function
886 will overrule the CPU usage LED.
888 config ALIGNMENT_TRAP
890 depends on CPU_CP15_MMU
891 default y if !ARCH_EBSA110
893 ARM processors cannot fetch/store information which is not
894 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
895 address divisible by 4. On 32-bit ARM processors, these non-aligned
896 fetch/store instructions will be emulated in software if you say
897 here, which has a severe performance impact. This is necessary for
898 correct operation of some network protocols. With an IP-only
899 configuration it is safe to say N, otherwise say Y.
905 # Compressed boot loader in ROM. Yes, we really want to ask about
906 # TEXT and BSS so we preserve their values in the config files.
907 config ZBOOT_ROM_TEXT
908 hex "Compressed ROM boot loader base address"
911 The physical address at which the ROM-able zImage is to be
912 placed in the target. Platforms which normally make use of
913 ROM-able zImage formats normally set this to a suitable
914 value in their defconfig file.
916 If ZBOOT_ROM is not enabled, this has no effect.
919 hex "Compressed ROM boot loader BSS address"
922 The base address of an area of read/write memory in the target
923 for the ROM-able zImage which must be available while the
924 decompressor is running. It must be large enough to hold the
925 entire decompressed kernel plus an additional 128 KiB.
926 Platforms which normally make use of ROM-able zImage formats
927 normally set this to a suitable value in their defconfig file.
929 If ZBOOT_ROM is not enabled, this has no effect.
932 bool "Compressed boot loader in ROM/flash"
933 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
935 Say Y here if you intend to execute your compressed kernel image
936 (zImage) directly from ROM or flash. If unsure, say N.
939 string "Default kernel command string"
942 On some architectures (EBSA110 and CATS), there is currently no way
943 for the boot loader to pass arguments to the kernel. For these
944 architectures, you should supply some command-line options at build
945 time by entering them here. As a minimum, you should specify the
946 memory size and the root device (e.g., mem=64M root=/dev/nfs).
949 bool "Kernel Execute-In-Place from ROM"
950 depends on !ZBOOT_ROM
952 Execute-In-Place allows the kernel to run from non-volatile storage
953 directly addressable by the CPU, such as NOR flash. This saves RAM
954 space since the text section of the kernel is not loaded from flash
955 to RAM. Read-write sections, such as the data section and stack,
956 are still copied to RAM. The XIP kernel is not compressed since
957 it has to run directly from flash, so it will take more space to
958 store it. The flash address used to link the kernel object files,
959 and for storing it, is configuration dependent. Therefore, if you
960 say Y here, you must know the proper physical address where to
961 store the kernel image depending on your own flash memory usage.
963 Also note that the make target becomes "make xipImage" rather than
964 "make zImage" or "make Image". The final kernel binary to put in
965 ROM memory will be arch/arm/boot/xipImage.
970 hex "XIP Kernel Physical Location"
971 depends on XIP_KERNEL
974 This is the physical address in your flash memory the kernel will
975 be linked for and stored to. This address is dependent on your
979 bool "Kexec system call (EXPERIMENTAL)"
980 depends on EXPERIMENTAL
982 kexec is a system call that implements the ability to shutdown your
983 current kernel, and to start another kernel. It is like a reboot
984 but it is independent of the system firmware. And like a reboot
985 you can start any kernel with it, not just Linux.
987 It is an ongoing process to be certain the hardware in a machine
988 is properly shutdown, so do not be surprised if this code does not
989 initially work for you. It may help to enable device hotplugging
993 bool "Export atags in procfs"
997 Should the atags used to boot the kernel be exported in an "atags"
998 file in procfs. Useful with kexec.
1002 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1004 menu "CPU Frequency scaling"
1006 source "drivers/cpufreq/Kconfig"
1008 config CPU_FREQ_SA1100
1010 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1013 config CPU_FREQ_SA1110
1015 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1018 config CPU_FREQ_INTEGRATOR
1019 tristate "CPUfreq driver for ARM Integrator CPUs"
1020 depends on ARCH_INTEGRATOR && CPU_FREQ
1023 This enables the CPUfreq driver for ARM Integrator CPUs.
1025 For details, take a look at <file:Documentation/cpu-freq>.
1030 tristate "CPUfreq driver for i.MX CPUs"
1031 depends on ARCH_IMX && CPU_FREQ
1034 This enables the CPUfreq driver for i.MX CPUs.
1040 depends on CPU_FREQ && ARCH_PXA && PXA25x
1042 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1048 menu "Floating point emulation"
1050 comment "At least one emulation must be selected"
1053 bool "NWFPE math emulation"
1054 depends on !AEABI || OABI_COMPAT
1056 Say Y to include the NWFPE floating point emulator in the kernel.
1057 This is necessary to run most binaries. Linux does not currently
1058 support floating point hardware so you need to say Y here even if
1059 your machine has an FPA or floating point co-processor podule.
1061 You may say N here if you are going to load the Acorn FPEmulator
1062 early in the bootup.
1065 bool "Support extended precision"
1066 depends on FPE_NWFPE
1068 Say Y to include 80-bit support in the kernel floating-point
1069 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1070 Note that gcc does not generate 80-bit operations by default,
1071 so in most cases this option only enlarges the size of the
1072 floating point emulator without any good reason.
1074 You almost surely want to say N here.
1077 bool "FastFPE math emulation (EXPERIMENTAL)"
1078 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1080 Say Y here to include the FAST floating point emulator in the kernel.
1081 This is an experimental much faster emulator which now also has full
1082 precision for the mantissa. It does not support any exceptions.
1083 It is very simple, and approximately 3-6 times faster than NWFPE.
1085 It should be sufficient for most programs. It may be not suitable
1086 for scientific calculations, but you have to check this for yourself.
1087 If you do not feel you need a faster FP emulation you should better
1091 bool "VFP-format floating point maths"
1092 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1094 Say Y to include VFP support code in the kernel. This is needed
1095 if your hardware includes a VFP unit.
1097 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1098 release notes and additional status information.
1100 Say N if your target does not have VFP hardware.
1108 bool "Advanced SIMD (NEON) Extension support"
1109 depends on VFPv3 && CPU_V7
1111 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1116 menu "Userspace binary formats"
1118 source "fs/Kconfig.binfmt"
1121 tristate "RISC OS personality"
1124 Say Y here to include the kernel code necessary if you want to run
1125 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1126 experimental; if this sounds frightening, say N and sleep in peace.
1127 You can also say M here to compile this support as a module (which
1128 will be called arthur).
1132 menu "Power management options"
1134 source "kernel/power/Kconfig"
1136 config ARCH_SUSPEND_POSSIBLE
1141 source "net/Kconfig"
1143 menu "Device Drivers"
1145 source "drivers/base/Kconfig"
1147 source "drivers/connector/Kconfig"
1149 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1150 source "drivers/mtd/Kconfig"
1153 source "drivers/parport/Kconfig"
1155 source "drivers/pnp/Kconfig"
1157 source "drivers/block/Kconfig"
1159 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1161 source "drivers/misc/Kconfig"
1163 source "drivers/ide/Kconfig"
1165 source "drivers/scsi/Kconfig"
1167 source "drivers/ata/Kconfig"
1169 source "drivers/md/Kconfig"
1171 source "drivers/message/fusion/Kconfig"
1173 source "drivers/ieee1394/Kconfig"
1175 source "drivers/message/i2o/Kconfig"
1177 source "drivers/net/Kconfig"
1179 source "drivers/isdn/Kconfig"
1181 # input before char - char/joystick depends on it. As does USB.
1183 source "drivers/input/Kconfig"
1185 source "drivers/char/Kconfig"
1187 source "drivers/i2c/Kconfig"
1189 source "drivers/spi/Kconfig"
1191 source "drivers/gpio/Kconfig"
1193 source "drivers/w1/Kconfig"
1195 source "drivers/power/Kconfig"
1197 source "drivers/hwmon/Kconfig"
1199 source "drivers/watchdog/Kconfig"
1201 source "drivers/ssb/Kconfig"
1203 #source "drivers/l3/Kconfig"
1205 source "drivers/mfd/Kconfig"
1207 source "drivers/media/Kconfig"
1209 source "drivers/video/Kconfig"
1211 source "sound/Kconfig"
1213 source "drivers/hid/Kconfig"
1215 source "drivers/usb/Kconfig"
1217 source "drivers/mmc/Kconfig"
1219 source "drivers/leds/Kconfig"
1221 source "drivers/rtc/Kconfig"
1223 source "drivers/dma/Kconfig"
1225 source "drivers/dca/Kconfig"
1227 source "drivers/uio/Kconfig"
1233 source "arch/arm/Kconfig.debug"
1235 source "security/Kconfig"
1237 source "crypto/Kconfig"
1239 source "lib/Kconfig"