2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
6 mainmenu "Linux Kernel Configuration"
12 select SYS_SUPPORTS_APM_EMULATION
15 The ARM series is a line of low-power-consumption RISC chip designs
16 licensed by ARM Ltd and targeted at embedded applications and
17 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
18 manufactured, but legacy ARM-based PC hardware remains popular in
19 Europe. There is an ARM Linux project with a web page at
20 <http://www.arm.linux.org.uk/>.
22 config SYS_SUPPORTS_APM_EMULATION
33 config GENERIC_CLOCKEVENTS
48 The Extended Industry Standard Architecture (EISA) bus was
49 developed as an open alternative to the IBM MicroChannel bus.
51 The EISA bus provided some of the features of the IBM MicroChannel
52 bus while maintaining backward compatibility with cards made for
53 the older ISA bus. The EISA bus saw limited use between 1988 and
54 1995 when it was made obsolete by the PCI bus.
56 Say Y here if you are building a kernel for an EISA-based machine.
66 MicroChannel Architecture is found in some IBM PS/2 machines and
67 laptops. It is a bus system similar to PCI or ISA. See
68 <file:Documentation/mca.txt> (and especially the web page given
69 there) before attempting to build an MCA bus kernel.
71 config GENERIC_HARDIRQS
75 config STACKTRACE_SUPPORT
79 config LOCKDEP_SUPPORT
83 config TRACE_IRQFLAGS_SUPPORT
87 config HARDIRQS_SW_RESEND
91 config GENERIC_IRQ_PROBE
95 config GENERIC_LOCKBREAK
98 depends on SMP && PREEMPT
100 config RWSEM_GENERIC_SPINLOCK
104 config RWSEM_XCHGADD_ALGORITHM
107 config ARCH_HAS_ILOG2_U32
111 config ARCH_HAS_ILOG2_U64
115 config GENERIC_HWEIGHT
119 config GENERIC_CALIBRATE_DELAY
123 config ARCH_MAY_HAVE_PC_FDC
130 config GENERIC_ISA_DMA
141 config OPROFILE_ARMV6
143 depends on CPU_V6 && !SMP
144 select OPROFILE_ARM11_CORE
146 config OPROFILE_MPCORE
148 depends on CPU_V6 && SMP
149 select OPROFILE_ARM11_CORE
151 config OPROFILE_ARM11_CORE
158 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
159 default DRAM_BASE if REMAP_VECTORS_TO_RAM
162 The base address of exception vectors.
164 source "init/Kconfig"
169 prompt "ARM system type"
170 default ARCH_VERSATILE
173 bool "Agilent AAEC-2000 based"
176 This enables support for systems based on the Agilent AAEC-2000
178 config ARCH_INTEGRATOR
179 bool "ARM Ltd. Integrator family"
183 Support for ARM's Integrator platform.
186 bool "ARM Ltd. RealView family"
190 This enables support for ARM Ltd RealView boards.
192 config ARCH_VERSATILE
193 bool "ARM Ltd. Versatile family"
198 select GENERIC_CLOCKEVENTS
200 This enables support for ARM Ltd Versatile board.
206 This enables support for systems based on the Atmel AT91RM9200,
207 AT91SAM9 and AT91CAP9 processors.
210 bool "Cirrus CL-PS7500FE"
215 Support for the Cirrus Logic PS7500FE system-on-a-chip.
218 bool "Cirrus Logic CLPS711x/EP721x-based"
220 Support for Cirrus Logic 711x/721x based boards.
225 select FOOTBRIDGE_ADDIN
227 Support for Intel's EBSA285 companion chip.
234 This is an evaluation board for the StrongARM processor available
235 from Digital. It has limited hardware on-board, including an
236 Ethernet interface, two PCMCIA sockets, two serial ports and a
245 This enables support for the Cirrus EP93xx series of CPUs.
247 config ARCH_FOOTBRIDGE
251 Support for systems based on the DC21285 companion chip
252 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
255 bool "Hilscher NetX based"
258 This enables support for systems based on the Hilscher NetX Soc
261 bool "Hynix HMS720x-based"
264 This enables support for systems based on the Hynix HMS720x
270 select GENERIC_CLOCKEVENTS
272 Support for Motorola's i.MX family of processors (MX1, MXL).
279 select ARCH_SUPPORTS_MSI
281 Support for Intel's IOP13XX (XScale) family of processors.
289 Support for Intel's 80219 and IOP32X (XScale) family of
298 Support for Intel's IOP33X (XScale) family of processors.
305 Support for Intel's IXP23xx (XScale) family of processors.
308 bool "IXP2400/2800-based"
312 Support for Intel's IXP2400/2800 (XScale) family of processors.
319 select GENERIC_CLOCKEVENTS
321 Support for Intel's IXP4XX (XScale) family of processors.
327 Say Y here if you intend to run this kernel on a LinkUp Systems
328 L7200 Software Development Board which uses an ARM720T processor.
329 Information on this board can be obtained at:
331 <http://www.linkupsys.com/>
333 If you have any questions or comments about the Linux kernel port
334 to this board, send e-mail to <sjhill@cotw.com>.
337 bool "Micrel/Kendin KS8695"
340 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
341 System-on-Chip devices.
344 bool "NetSilicon NS9xxx"
347 select GENERIC_CLOCKEVENTS
349 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
352 <http://www.digi.com/products/microprocessors/index.jsp>
355 bool "Freescale MXC/iMX-based"
358 Support for Freescale MXC/iMX-based family of processors
366 select GENERIC_CLOCKEVENTS
368 Support for Marvell Orion System on Chip family.
371 bool "Philips Nexperia PNX4008 Mobile"
373 This enables support for Philips PNX4008 mobile platform.
376 bool "PXA2xx/PXA3xx-based"
381 select GENERIC_CLOCKEVENTS
384 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
391 select ARCH_MAY_HAVE_PC_FDC
395 On the Acorn Risc-PC, Linux can support the internal IDE disk and
396 CD-ROM interface, serial and parallel port, and the floppy drive.
401 select ARCH_DISCONTIGMEM_ENABLE
406 Support for StrongARM 11x0 based boards.
409 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
412 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
413 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
414 the Samsung SMDK2410 development board (and derivatives).
422 Support for the StrongARM based Digital DNARD machine, also known
423 as "Shark" (<http://www.shark-linux.de/shark.html>).
428 Say Y here for systems based on one of the Sharp LH7A40X
429 System on a Chip processors. These CPUs include an ARM922T
430 core with a wide array of integrated devices for
431 hand-held and low-power applications.
436 select GENERIC_CLOCKEVENTS
439 Support for TI's DaVinci platform.
446 Support for TI's OMAP platform (OMAP1 and OMAP2).
449 bool "Qualcomm MSM7X00A"
451 select GENERIC_CLOCKEVENTS
453 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
454 apps processor of the MSM7X00A and depends on a shared memory
455 interface to the ARM9 modem processor which runs the baseband stack
456 and controls some vital subsystems (clock and power control, etc).
457 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
461 source "arch/arm/mach-clps711x/Kconfig"
463 source "arch/arm/mach-ep93xx/Kconfig"
465 source "arch/arm/mach-footbridge/Kconfig"
467 source "arch/arm/mach-integrator/Kconfig"
469 source "arch/arm/mach-iop32x/Kconfig"
471 source "arch/arm/mach-iop33x/Kconfig"
473 source "arch/arm/mach-iop13xx/Kconfig"
475 source "arch/arm/mach-ixp4xx/Kconfig"
477 source "arch/arm/mach-ixp2000/Kconfig"
479 source "arch/arm/mach-ixp23xx/Kconfig"
481 source "arch/arm/mach-pxa/Kconfig"
483 source "arch/arm/mach-sa1100/Kconfig"
485 source "arch/arm/plat-omap/Kconfig"
487 source "arch/arm/mach-omap1/Kconfig"
489 source "arch/arm/mach-omap2/Kconfig"
491 source "arch/arm/mach-orion/Kconfig"
493 source "arch/arm/plat-s3c24xx/Kconfig"
494 source "arch/arm/plat-s3c/Kconfig"
497 source "arch/arm/mach-s3c2400/Kconfig"
498 source "arch/arm/mach-s3c2410/Kconfig"
499 source "arch/arm/mach-s3c2412/Kconfig"
500 source "arch/arm/mach-s3c2440/Kconfig"
501 source "arch/arm/mach-s3c2442/Kconfig"
502 source "arch/arm/mach-s3c2443/Kconfig"
505 source "arch/arm/mach-lh7a40x/Kconfig"
507 source "arch/arm/mach-imx/Kconfig"
509 source "arch/arm/mach-h720x/Kconfig"
511 source "arch/arm/mach-versatile/Kconfig"
513 source "arch/arm/mach-aaec2000/Kconfig"
515 source "arch/arm/mach-realview/Kconfig"
517 source "arch/arm/mach-at91/Kconfig"
519 source "arch/arm/plat-mxc/Kconfig"
521 source "arch/arm/mach-netx/Kconfig"
523 source "arch/arm/mach-ns9xxx/Kconfig"
525 source "arch/arm/mach-davinci/Kconfig"
527 source "arch/arm/mach-ks8695/Kconfig"
529 source "arch/arm/mach-msm/Kconfig"
531 # Definitions to make life easier
538 source arch/arm/mm/Kconfig
541 bool "Enable iWMMXt support"
542 depends on CPU_XSCALE || CPU_XSC3
543 default y if PXA27x || PXA3xx
545 Enable support for iWMMXt context switching at run time if
546 running on a CPU that supports it.
548 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
551 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
555 source "arch/arm/Kconfig-nommu"
560 source "arch/arm/common/Kconfig"
562 config FORCE_MAX_ZONEORDER
575 Find out whether you have ISA slots on your motherboard. ISA is the
576 name of a bus system, i.e. the way the CPU talks to the other stuff
577 inside your box. Other bus systems are PCI, EISA, MicroChannel
578 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
579 newer boards don't support it. If you have ISA, say Y, otherwise N.
581 # Select ISA DMA controller support
586 # Select ISA DMA interface
591 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
593 Find out whether you have a PCI motherboard. PCI is the name of a
594 bus system, i.e. the way the CPU talks to the other stuff inside
595 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
596 VESA. If you have PCI, say Y, otherwise N.
601 # Select the host bridge type
602 config PCI_HOST_VIA82C505
604 depends on PCI && ARCH_SHARK
607 config PCI_HOST_ITE8152
609 depends on PCI && MACH_ARMCORE
613 source "drivers/pci/Kconfig"
615 source "drivers/pcmcia/Kconfig"
619 menu "Kernel Features"
621 source "kernel/time/Kconfig"
624 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
625 depends on EXPERIMENTAL && REALVIEW_MPCORE
627 This enables support for systems with more than one CPU. If you have
628 a system with only one CPU, like most personal computers, say N. If
629 you have a system with more than one CPU, say Y.
631 If you say N here, the kernel will run on single and multiprocessor
632 machines, but will use only one CPU of a multiprocessor machine. If
633 you say Y here, the kernel will run on many, but not all, single
634 processor machines. On a single processor machine, the kernel will
635 run faster if you say N here.
637 See also the <file:Documentation/smp.txt>,
638 <file:Documentation/i386/IO-APIC.txt>,
639 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
640 <http://www.linuxdoc.org/docs.html#howto>.
642 If you don't know what to do here, say N.
645 int "Maximum number of CPUs (2-32)"
651 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
652 depends on SMP && HOTPLUG && EXPERIMENTAL
654 Say Y here to experiment with turning CPUs off and on. CPUs
655 can be controlled through /sys/devices/system/cpu.
658 bool "Use local timer interrupts"
659 depends on SMP && REALVIEW_MPCORE
662 Enable support for local timers on SMP platforms, rather then the
663 legacy IPI broadcast method. Local timers allows the system
664 accounting to be spread across the timer interval, preventing a
665 "thundering herd" at every timer tick.
668 bool "Preemptible Kernel (EXPERIMENTAL)"
669 depends on EXPERIMENTAL
671 This option reduces the latency of the kernel when reacting to
672 real-time or interactive events by allowing a low priority process to
673 be preempted even if it is in kernel mode executing a system call.
674 This allows applications to run more reliably even when the system is
677 Say Y here if you are building a kernel for a desktop, embedded
678 or real-time system. Say N if you are unsure.
681 bool "Dynamic tick timer"
682 depends on !GENERIC_CLOCKEVENTS
684 Select this option if you want to disable continuous timer ticks
685 and have them programmed to occur as required. This option saves
686 power as the system can remain in idle state for longer.
688 By default dynamic tick is disabled during the boot, and can be
689 manually enabled with:
691 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
693 Alternatively, if you want dynamic tick automatically enabled
694 during boot, pass "dyntick=enable" via the kernel command string.
696 Please note that dynamic tick may affect the accuracy of
697 timekeeping on some platforms depending on the implementation.
698 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
699 to have accurate timekeeping with dynamic tick.
703 default 128 if ARCH_L7200
704 default 200 if ARCH_EBSA110 || ARCH_S3C2410
705 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
706 default AT91_TIMER_HZ if ARCH_AT91
710 bool "Use the ARM EABI to compile the kernel"
712 This option allows for the kernel to be compiled using the latest
713 ARM ABI (aka EABI). This is only useful if you are using a user
714 space environment that is also compiled with EABI.
716 Since there are major incompatibilities between the legacy ABI and
717 EABI, especially with regard to structure member alignment, this
718 option also changes the kernel syscall calling convention to
719 disambiguate both ABIs and allow for backward compatibility support
720 (selected with CONFIG_OABI_COMPAT).
722 To use this you need GCC version 4.0.0 or later.
725 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
726 depends on AEABI && EXPERIMENTAL
729 This option preserves the old syscall interface along with the
730 new (ARM EABI) one. It also provides a compatibility layer to
731 intercept syscalls that have structure arguments which layout
732 in memory differs between the legacy ABI and the new ARM EABI
733 (only for non "thumb" binaries). This option adds a tiny
734 overhead to all syscalls and produces a slightly larger kernel.
735 If you know you'll be using only pure EABI user space then you
736 can say N here. If this option is not selected and you attempt
737 to execute a legacy ABI binary then the result will be
738 UNPREDICTABLE (in fact it can be predicted that it won't work
739 at all). If in doubt say Y.
741 config ARCH_DISCONTIGMEM_ENABLE
743 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
745 Say Y to support efficient handling of discontiguous physical memory,
746 for architectures which are either NUMA (Non-Uniform Memory Access)
747 or have huge holes in the physical address space for other reasons.
748 See <file:Documentation/vm/numa> for more.
752 default "4" if ARCH_LH7A40X
754 depends on NEED_MULTIPLE_NODES
759 bool "Timer and CPU usage LEDs"
760 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
761 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
762 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
763 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
764 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
765 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
766 ARCH_KS8695 || MACH_RD88F5182
768 If you say Y here, the LEDs on your machine will be used
769 to provide useful information about your current system status.
771 If you are compiling a kernel for a NetWinder or EBSA-285, you will
772 be able to select which LEDs are active using the options below. If
773 you are compiling a kernel for the EBSA-110 or the LART however, the
774 red LED will simply flash regularly to indicate that the system is
775 still functional. It is safe to say Y here if you have a CATS
776 system, but the driver will do nothing.
779 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
780 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
781 || MACH_OMAP_PERSEUS2
783 depends on !GENERIC_CLOCKEVENTS
784 default y if ARCH_EBSA110
786 If you say Y here, one of the system LEDs (the green one on the
787 NetWinder, the amber one on the EBSA285, or the red one on the LART)
788 will flash regularly to indicate that the system is still
789 operational. This is mainly useful to kernel hackers who are
790 debugging unstable kernels.
792 The LART uses the same LED for both Timer LED and CPU usage LED
793 functions. You may choose to use both, but the Timer LED function
794 will overrule the CPU usage LED.
797 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
799 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
800 || MACH_OMAP_PERSEUS2
803 If you say Y here, the red LED will be used to give a good real
804 time indication of CPU usage, by lighting whenever the idle task
805 is not currently executing.
807 The LART uses the same LED for both Timer LED and CPU usage LED
808 functions. You may choose to use both, but the Timer LED function
809 will overrule the CPU usage LED.
811 config ALIGNMENT_TRAP
813 depends on CPU_CP15_MMU
814 default y if !ARCH_EBSA110
816 ARM processors cannot fetch/store information which is not
817 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
818 address divisible by 4. On 32-bit ARM processors, these non-aligned
819 fetch/store instructions will be emulated in software if you say
820 here, which has a severe performance impact. This is necessary for
821 correct operation of some network protocols. With an IP-only
822 configuration it is safe to say N, otherwise say Y.
828 # Compressed boot loader in ROM. Yes, we really want to ask about
829 # TEXT and BSS so we preserve their values in the config files.
830 config ZBOOT_ROM_TEXT
831 hex "Compressed ROM boot loader base address"
834 The physical address at which the ROM-able zImage is to be
835 placed in the target. Platforms which normally make use of
836 ROM-able zImage formats normally set this to a suitable
837 value in their defconfig file.
839 If ZBOOT_ROM is not enabled, this has no effect.
842 hex "Compressed ROM boot loader BSS address"
845 The base address of an area of read/write memory in the target
846 for the ROM-able zImage which must be available while the
847 decompressor is running. It must be large enough to hold the
848 entire decompressed kernel plus an additional 128 KiB.
849 Platforms which normally make use of ROM-able zImage formats
850 normally set this to a suitable value in their defconfig file.
852 If ZBOOT_ROM is not enabled, this has no effect.
855 bool "Compressed boot loader in ROM/flash"
856 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
858 Say Y here if you intend to execute your compressed kernel image
859 (zImage) directly from ROM or flash. If unsure, say N.
862 string "Default kernel command string"
865 On some architectures (EBSA110 and CATS), there is currently no way
866 for the boot loader to pass arguments to the kernel. For these
867 architectures, you should supply some command-line options at build
868 time by entering them here. As a minimum, you should specify the
869 memory size and the root device (e.g., mem=64M root=/dev/nfs).
872 bool "Kernel Execute-In-Place from ROM"
873 depends on !ZBOOT_ROM
875 Execute-In-Place allows the kernel to run from non-volatile storage
876 directly addressable by the CPU, such as NOR flash. This saves RAM
877 space since the text section of the kernel is not loaded from flash
878 to RAM. Read-write sections, such as the data section and stack,
879 are still copied to RAM. The XIP kernel is not compressed since
880 it has to run directly from flash, so it will take more space to
881 store it. The flash address used to link the kernel object files,
882 and for storing it, is configuration dependent. Therefore, if you
883 say Y here, you must know the proper physical address where to
884 store the kernel image depending on your own flash memory usage.
886 Also note that the make target becomes "make xipImage" rather than
887 "make zImage" or "make Image". The final kernel binary to put in
888 ROM memory will be arch/arm/boot/xipImage.
893 hex "XIP Kernel Physical Location"
894 depends on XIP_KERNEL
897 This is the physical address in your flash memory the kernel will
898 be linked for and stored to. This address is dependent on your
902 bool "Kexec system call (EXPERIMENTAL)"
903 depends on EXPERIMENTAL
905 kexec is a system call that implements the ability to shutdown your
906 current kernel, and to start another kernel. It is like a reboot
907 but it is independent of the system firmware. And like a reboot
908 you can start any kernel with it, not just Linux.
910 It is an ongoing process to be certain the hardware in a machine
911 is properly shutdown, so do not be surprised if this code does not
912 initially work for you. It may help to enable device hotplugging
917 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
919 menu "CPU Frequency scaling"
921 source "drivers/cpufreq/Kconfig"
923 config CPU_FREQ_SA1100
925 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
928 config CPU_FREQ_SA1110
930 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
933 config CPU_FREQ_INTEGRATOR
934 tristate "CPUfreq driver for ARM Integrator CPUs"
935 depends on ARCH_INTEGRATOR && CPU_FREQ
938 This enables the CPUfreq driver for ARM Integrator CPUs.
940 For details, take a look at <file:Documentation/cpu-freq>.
945 tristate "CPUfreq driver for i.MX CPUs"
946 depends on ARCH_IMX && CPU_FREQ
949 This enables the CPUfreq driver for i.MX CPUs.
955 depends on CPU_FREQ && ARCH_PXA && PXA25x
957 select CPU_FREQ_DEFAULT_GOV_USERSPACE
963 menu "Floating point emulation"
965 comment "At least one emulation must be selected"
968 bool "NWFPE math emulation"
969 depends on !AEABI || OABI_COMPAT
971 Say Y to include the NWFPE floating point emulator in the kernel.
972 This is necessary to run most binaries. Linux does not currently
973 support floating point hardware so you need to say Y here even if
974 your machine has an FPA or floating point co-processor podule.
976 You may say N here if you are going to load the Acorn FPEmulator
980 bool "Support extended precision"
983 Say Y to include 80-bit support in the kernel floating-point
984 emulator. Otherwise, only 32 and 64-bit support is compiled in.
985 Note that gcc does not generate 80-bit operations by default,
986 so in most cases this option only enlarges the size of the
987 floating point emulator without any good reason.
989 You almost surely want to say N here.
992 bool "FastFPE math emulation (EXPERIMENTAL)"
993 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
995 Say Y here to include the FAST floating point emulator in the kernel.
996 This is an experimental much faster emulator which now also has full
997 precision for the mantissa. It does not support any exceptions.
998 It is very simple, and approximately 3-6 times faster than NWFPE.
1000 It should be sufficient for most programs. It may be not suitable
1001 for scientific calculations, but you have to check this for yourself.
1002 If you do not feel you need a faster FP emulation you should better
1006 bool "VFP-format floating point maths"
1007 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1009 Say Y to include VFP support code in the kernel. This is needed
1010 if your hardware includes a VFP unit.
1012 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1013 release notes and additional status information.
1015 Say N if your target does not have VFP hardware.
1023 bool "Advanced SIMD (NEON) Extension support"
1024 depends on VFPv3 && CPU_V7
1026 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1031 menu "Userspace binary formats"
1033 source "fs/Kconfig.binfmt"
1036 tristate "RISC OS personality"
1039 Say Y here to include the kernel code necessary if you want to run
1040 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1041 experimental; if this sounds frightening, say N and sleep in peace.
1042 You can also say M here to compile this support as a module (which
1043 will be called arthur).
1047 menu "Power management options"
1049 source "kernel/power/Kconfig"
1051 config ARCH_SUSPEND_POSSIBLE
1056 source "net/Kconfig"
1058 menu "Device Drivers"
1060 source "drivers/base/Kconfig"
1062 source "drivers/connector/Kconfig"
1064 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1065 source "drivers/mtd/Kconfig"
1068 source "drivers/parport/Kconfig"
1070 source "drivers/pnp/Kconfig"
1072 source "drivers/block/Kconfig"
1074 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1076 source "drivers/misc/Kconfig"
1078 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
1079 || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
1080 || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
1082 source "drivers/ide/Kconfig"
1085 source "drivers/scsi/Kconfig"
1087 source "drivers/ata/Kconfig"
1089 source "drivers/md/Kconfig"
1091 source "drivers/message/fusion/Kconfig"
1093 source "drivers/ieee1394/Kconfig"
1095 source "drivers/message/i2o/Kconfig"
1097 source "drivers/net/Kconfig"
1099 source "drivers/isdn/Kconfig"
1101 # input before char - char/joystick depends on it. As does USB.
1103 source "drivers/input/Kconfig"
1105 source "drivers/char/Kconfig"
1107 source "drivers/i2c/Kconfig"
1109 source "drivers/spi/Kconfig"
1111 source "drivers/w1/Kconfig"
1113 source "drivers/power/Kconfig"
1115 source "drivers/hwmon/Kconfig"
1117 source "drivers/watchdog/Kconfig"
1119 source "drivers/ssb/Kconfig"
1121 #source "drivers/l3/Kconfig"
1123 source "drivers/mfd/Kconfig"
1125 source "drivers/media/Kconfig"
1127 source "drivers/video/Kconfig"
1129 source "sound/Kconfig"
1131 source "drivers/hid/Kconfig"
1133 source "drivers/usb/Kconfig"
1135 source "drivers/mmc/Kconfig"
1137 source "drivers/leds/Kconfig"
1139 source "drivers/rtc/Kconfig"
1141 source "drivers/dma/Kconfig"
1143 source "drivers/dca/Kconfig"
1149 source "kernel/Kconfig.instrumentation"
1151 source "arch/arm/Kconfig.debug"
1153 source "security/Kconfig"
1155 source "crypto/Kconfig"
1157 source "lib/Kconfig"