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
14 select HAVE_KPROBES if (!XIP_KERNEL)
16 The ARM series is a line of low-power-consumption RISC chip designs
17 licensed by ARM Ltd and targeted at embedded applications and
18 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
19 manufactured, but legacy ARM-based PC hardware remains popular in
20 Europe. There is an ARM Linux project with a web page at
21 <http://www.arm.linux.org.uk/>.
23 config SYS_SUPPORTS_APM_EMULATION
34 config GENERIC_CLOCKEVENTS
38 config GENERIC_CLOCKEVENTS_BROADCAST
40 depends on GENERIC_CLOCKEVENTS
41 default y if SMP && !LOCAL_TIMERS
54 The Extended Industry Standard Architecture (EISA) bus was
55 developed as an open alternative to the IBM MicroChannel bus.
57 The EISA bus provided some of the features of the IBM MicroChannel
58 bus while maintaining backward compatibility with cards made for
59 the older ISA bus. The EISA bus saw limited use between 1988 and
60 1995 when it was made obsolete by the PCI bus.
62 Say Y here if you are building a kernel for an EISA-based machine.
72 MicroChannel Architecture is found in some IBM PS/2 machines and
73 laptops. It is a bus system similar to PCI or ISA. See
74 <file:Documentation/mca.txt> (and especially the web page given
75 there) before attempting to build an MCA bus kernel.
77 config GENERIC_HARDIRQS
81 config STACKTRACE_SUPPORT
85 config LOCKDEP_SUPPORT
89 config TRACE_IRQFLAGS_SUPPORT
93 config HARDIRQS_SW_RESEND
97 config GENERIC_IRQ_PROBE
101 config GENERIC_LOCKBREAK
104 depends on SMP && PREEMPT
106 config RWSEM_GENERIC_SPINLOCK
110 config RWSEM_XCHGADD_ALGORITHM
113 config ARCH_HAS_ILOG2_U32
117 config ARCH_HAS_ILOG2_U64
121 config GENERIC_HWEIGHT
125 config GENERIC_CALIBRATE_DELAY
129 config ARCH_SUPPORTS_AOUT
132 config ARCH_MAY_HAVE_PC_FDC
139 config GENERIC_ISA_DMA
150 config OPROFILE_ARMV6
152 depends on CPU_V6 && !SMP
153 select OPROFILE_ARM11_CORE
155 config OPROFILE_MPCORE
157 depends on CPU_V6 && SMP
158 select OPROFILE_ARM11_CORE
160 config OPROFILE_ARM11_CORE
167 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
168 default DRAM_BASE if REMAP_VECTORS_TO_RAM
171 The base address of exception vectors.
173 source "init/Kconfig"
178 prompt "ARM system type"
179 default ARCH_VERSATILE
182 bool "Agilent AAEC-2000 based"
185 This enables support for systems based on the Agilent AAEC-2000
187 config ARCH_INTEGRATOR
188 bool "ARM Ltd. Integrator family"
192 Support for ARM's Integrator platform.
195 bool "ARM Ltd. RealView family"
199 select GENERIC_CLOCKEVENTS
201 This enables support for ARM Ltd RealView boards.
203 config ARCH_VERSATILE
204 bool "ARM Ltd. Versatile family"
209 select GENERIC_CLOCKEVENTS
211 This enables support for ARM Ltd Versatile board.
217 This enables support for systems based on the Atmel AT91RM9200,
218 AT91SAM9 and AT91CAP9 processors.
221 bool "Cirrus CL-PS7500FE"
226 Support for the Cirrus Logic PS7500FE system-on-a-chip.
229 bool "Cirrus Logic CLPS711x/EP721x-based"
231 Support for Cirrus Logic 711x/721x based boards.
236 select FOOTBRIDGE_ADDIN
238 Support for Intel's EBSA285 companion chip.
245 This is an evaluation board for the StrongARM processor available
246 from Digital. It has limited hardware on-board, including an
247 Ethernet interface, two PCMCIA sockets, two serial ports and a
256 This enables support for the Cirrus EP93xx series of CPUs.
258 config ARCH_FOOTBRIDGE
262 Support for systems based on the DC21285 companion chip
263 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
266 bool "Hilscher NetX based"
269 This enables support for systems based on the Hilscher NetX Soc
272 bool "Hynix HMS720x-based"
275 This enables support for systems based on the Hynix HMS720x
281 select GENERIC_CLOCKEVENTS
283 Support for Motorola's i.MX family of processors (MX1, MXL).
290 select ARCH_SUPPORTS_MSI
292 Support for Intel's IOP13XX (XScale) family of processors.
300 Support for Intel's 80219 and IOP32X (XScale) family of
309 Support for Intel's IOP33X (XScale) family of processors.
316 Support for Intel's IXP23xx (XScale) family of processors.
319 bool "IXP2400/2800-based"
323 Support for Intel's IXP2400/2800 (XScale) family of processors.
330 select GENERIC_CLOCKEVENTS
332 Support for Intel's IXP4XX (XScale) family of processors.
338 Say Y here if you intend to run this kernel on a LinkUp Systems
339 L7200 Software Development Board which uses an ARM720T processor.
340 Information on this board can be obtained at:
342 <http://www.linkupsys.com/>
344 If you have any questions or comments about the Linux kernel port
345 to this board, send e-mail to <sjhill@cotw.com>.
348 bool "Micrel/Kendin KS8695"
351 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
352 System-on-Chip devices.
355 bool "NetSilicon NS9xxx"
358 select GENERIC_CLOCKEVENTS
360 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
363 <http://www.digi.com/products/microprocessors/index.jsp>
366 bool "Freescale MXC/iMX-based"
369 Support for Freescale MXC/iMX-based family of processors
377 select GENERIC_CLOCKEVENTS
379 Support for Marvell Orion System on Chip family.
382 bool "Philips Nexperia PNX4008 Mobile"
384 This enables support for Philips PNX4008 mobile platform.
387 bool "PXA2xx/PXA3xx-based"
393 select GENERIC_CLOCKEVENTS
396 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
403 select ARCH_MAY_HAVE_PC_FDC
407 On the Acorn Risc-PC, Linux can support the internal IDE disk and
408 CD-ROM interface, serial and parallel port, and the floppy drive.
413 select ARCH_DISCONTIGMEM_ENABLE
418 Support for StrongARM 11x0 based boards.
421 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
424 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
425 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
426 the Samsung SMDK2410 development board (and derivatives).
434 Support for the StrongARM based Digital DNARD machine, also known
435 as "Shark" (<http://www.shark-linux.de/shark.html>).
440 Say Y here for systems based on one of the Sharp LH7A40X
441 System on a Chip processors. These CPUs include an ARM922T
442 core with a wide array of integrated devices for
443 hand-held and low-power applications.
448 select GENERIC_CLOCKEVENTS
451 Support for TI's DaVinci platform.
458 Support for TI's OMAP platform (OMAP1 and OMAP2).
461 bool "Qualcomm MSM7X00A"
463 select GENERIC_CLOCKEVENTS
465 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
466 apps processor of the MSM7X00A and depends on a shared memory
467 interface to the ARM9 modem processor which runs the baseband stack
468 and controls some vital subsystems (clock and power control, etc).
469 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
473 source "arch/arm/mach-clps711x/Kconfig"
475 source "arch/arm/mach-ep93xx/Kconfig"
477 source "arch/arm/mach-footbridge/Kconfig"
479 source "arch/arm/mach-integrator/Kconfig"
481 source "arch/arm/mach-iop32x/Kconfig"
483 source "arch/arm/mach-iop33x/Kconfig"
485 source "arch/arm/mach-iop13xx/Kconfig"
487 source "arch/arm/mach-ixp4xx/Kconfig"
489 source "arch/arm/mach-ixp2000/Kconfig"
491 source "arch/arm/mach-ixp23xx/Kconfig"
493 source "arch/arm/mach-pxa/Kconfig"
495 source "arch/arm/mach-sa1100/Kconfig"
497 source "arch/arm/plat-omap/Kconfig"
499 source "arch/arm/mach-omap1/Kconfig"
501 source "arch/arm/mach-omap2/Kconfig"
503 source "arch/arm/mach-orion/Kconfig"
505 source "arch/arm/plat-s3c24xx/Kconfig"
506 source "arch/arm/plat-s3c/Kconfig"
509 source "arch/arm/mach-s3c2400/Kconfig"
510 source "arch/arm/mach-s3c2410/Kconfig"
511 source "arch/arm/mach-s3c2412/Kconfig"
512 source "arch/arm/mach-s3c2440/Kconfig"
513 source "arch/arm/mach-s3c2442/Kconfig"
514 source "arch/arm/mach-s3c2443/Kconfig"
517 source "arch/arm/mach-lh7a40x/Kconfig"
519 source "arch/arm/mach-imx/Kconfig"
521 source "arch/arm/mach-h720x/Kconfig"
523 source "arch/arm/mach-versatile/Kconfig"
525 source "arch/arm/mach-aaec2000/Kconfig"
527 source "arch/arm/mach-realview/Kconfig"
529 source "arch/arm/mach-at91/Kconfig"
531 source "arch/arm/plat-mxc/Kconfig"
533 source "arch/arm/mach-netx/Kconfig"
535 source "arch/arm/mach-ns9xxx/Kconfig"
537 source "arch/arm/mach-davinci/Kconfig"
539 source "arch/arm/mach-ks8695/Kconfig"
541 source "arch/arm/mach-msm/Kconfig"
543 # Definitions to make life easier
550 source arch/arm/mm/Kconfig
553 bool "Enable iWMMXt support"
554 depends on CPU_XSCALE || CPU_XSC3
555 default y if PXA27x || PXA3xx
557 Enable support for iWMMXt context switching at run time if
558 running on a CPU that supports it.
560 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
563 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
567 source "arch/arm/Kconfig-nommu"
572 source "arch/arm/common/Kconfig"
574 config FORCE_MAX_ZONEORDER
587 Find out whether you have ISA slots on your motherboard. ISA is the
588 name of a bus system, i.e. the way the CPU talks to the other stuff
589 inside your box. Other bus systems are PCI, EISA, MicroChannel
590 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
591 newer boards don't support it. If you have ISA, say Y, otherwise N.
593 # Select ISA DMA controller support
598 # Select ISA DMA interface
603 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
605 Find out whether you have a PCI motherboard. PCI is the name of a
606 bus system, i.e. the way the CPU talks to the other stuff inside
607 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
608 VESA. If you have PCI, say Y, otherwise N.
613 # Select the host bridge type
614 config PCI_HOST_VIA82C505
616 depends on PCI && ARCH_SHARK
619 config PCI_HOST_ITE8152
621 depends on PCI && MACH_ARMCORE
625 source "drivers/pci/Kconfig"
627 source "drivers/pcmcia/Kconfig"
631 menu "Kernel Features"
633 source "kernel/time/Kconfig"
636 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
637 depends on EXPERIMENTAL && REALVIEW_EB_ARM11MP
639 This enables support for systems with more than one CPU. If you have
640 a system with only one CPU, like most personal computers, say N. If
641 you have a system with more than one CPU, say Y.
643 If you say N here, the kernel will run on single and multiprocessor
644 machines, but will use only one CPU of a multiprocessor machine. If
645 you say Y here, the kernel will run on many, but not all, single
646 processor machines. On a single processor machine, the kernel will
647 run faster if you say N here.
649 See also <file:Documentation/i386/IO-APIC.txt>,
650 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
651 <http://www.linuxdoc.org/docs.html#howto>.
653 If you don't know what to do here, say N.
656 int "Maximum number of CPUs (2-32)"
662 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
663 depends on SMP && HOTPLUG && EXPERIMENTAL
665 Say Y here to experiment with turning CPUs off and on. CPUs
666 can be controlled through /sys/devices/system/cpu.
669 bool "Use local timer interrupts"
670 depends on SMP && REALVIEW_EB_ARM11MP
673 Enable support for local timers on SMP platforms, rather then the
674 legacy IPI broadcast method. Local timers allows the system
675 accounting to be spread across the timer interval, preventing a
676 "thundering herd" at every timer tick.
679 bool "Preemptible Kernel (EXPERIMENTAL)"
680 depends on EXPERIMENTAL
682 This option reduces the latency of the kernel when reacting to
683 real-time or interactive events by allowing a low priority process to
684 be preempted even if it is in kernel mode executing a system call.
685 This allows applications to run more reliably even when the system is
688 Say Y here if you are building a kernel for a desktop, embedded
689 or real-time system. Say N if you are unsure.
692 bool "Dynamic tick timer"
693 depends on !GENERIC_CLOCKEVENTS
695 Select this option if you want to disable continuous timer ticks
696 and have them programmed to occur as required. This option saves
697 power as the system can remain in idle state for longer.
699 By default dynamic tick is disabled during the boot, and can be
700 manually enabled with:
702 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
704 Alternatively, if you want dynamic tick automatically enabled
705 during boot, pass "dyntick=enable" via the kernel command string.
707 Please note that dynamic tick may affect the accuracy of
708 timekeeping on some platforms depending on the implementation.
709 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
710 to have accurate timekeeping with dynamic tick.
714 default 128 if ARCH_L7200
715 default 200 if ARCH_EBSA110 || ARCH_S3C2410
716 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
717 default AT91_TIMER_HZ if ARCH_AT91
721 bool "Use the ARM EABI to compile the kernel"
723 This option allows for the kernel to be compiled using the latest
724 ARM ABI (aka EABI). This is only useful if you are using a user
725 space environment that is also compiled with EABI.
727 Since there are major incompatibilities between the legacy ABI and
728 EABI, especially with regard to structure member alignment, this
729 option also changes the kernel syscall calling convention to
730 disambiguate both ABIs and allow for backward compatibility support
731 (selected with CONFIG_OABI_COMPAT).
733 To use this you need GCC version 4.0.0 or later.
736 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
737 depends on AEABI && EXPERIMENTAL
740 This option preserves the old syscall interface along with the
741 new (ARM EABI) one. It also provides a compatibility layer to
742 intercept syscalls that have structure arguments which layout
743 in memory differs between the legacy ABI and the new ARM EABI
744 (only for non "thumb" binaries). This option adds a tiny
745 overhead to all syscalls and produces a slightly larger kernel.
746 If you know you'll be using only pure EABI user space then you
747 can say N here. If this option is not selected and you attempt
748 to execute a legacy ABI binary then the result will be
749 UNPREDICTABLE (in fact it can be predicted that it won't work
750 at all). If in doubt say Y.
752 config ARCH_DISCONTIGMEM_ENABLE
754 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
756 Say Y to support efficient handling of discontiguous physical memory,
757 for architectures which are either NUMA (Non-Uniform Memory Access)
758 or have huge holes in the physical address space for other reasons.
759 See <file:Documentation/vm/numa> for more.
763 default "4" if ARCH_LH7A40X
765 depends on NEED_MULTIPLE_NODES
770 bool "Timer and CPU usage LEDs"
771 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
772 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
773 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
774 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
775 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
776 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
777 ARCH_KS8695 || MACH_RD88F5182
779 If you say Y here, the LEDs on your machine will be used
780 to provide useful information about your current system status.
782 If you are compiling a kernel for a NetWinder or EBSA-285, you will
783 be able to select which LEDs are active using the options below. If
784 you are compiling a kernel for the EBSA-110 or the LART however, the
785 red LED will simply flash regularly to indicate that the system is
786 still functional. It is safe to say Y here if you have a CATS
787 system, but the driver will do nothing.
790 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
791 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
792 || MACH_OMAP_PERSEUS2
794 depends on !GENERIC_CLOCKEVENTS
795 default y if ARCH_EBSA110
797 If you say Y here, one of the system LEDs (the green one on the
798 NetWinder, the amber one on the EBSA285, or the red one on the LART)
799 will flash regularly to indicate that the system is still
800 operational. This is mainly useful to kernel hackers who are
801 debugging unstable kernels.
803 The LART uses the same LED for both Timer LED and CPU usage LED
804 functions. You may choose to use both, but the Timer LED function
805 will overrule the CPU usage LED.
808 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
810 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
811 || MACH_OMAP_PERSEUS2
814 If you say Y here, the red LED will be used to give a good real
815 time indication of CPU usage, by lighting whenever the idle task
816 is not currently executing.
818 The LART uses the same LED for both Timer LED and CPU usage LED
819 functions. You may choose to use both, but the Timer LED function
820 will overrule the CPU usage LED.
822 config ALIGNMENT_TRAP
824 depends on CPU_CP15_MMU
825 default y if !ARCH_EBSA110
827 ARM processors cannot fetch/store information which is not
828 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
829 address divisible by 4. On 32-bit ARM processors, these non-aligned
830 fetch/store instructions will be emulated in software if you say
831 here, which has a severe performance impact. This is necessary for
832 correct operation of some network protocols. With an IP-only
833 configuration it is safe to say N, otherwise say Y.
839 # Compressed boot loader in ROM. Yes, we really want to ask about
840 # TEXT and BSS so we preserve their values in the config files.
841 config ZBOOT_ROM_TEXT
842 hex "Compressed ROM boot loader base address"
845 The physical address at which the ROM-able zImage is to be
846 placed in the target. Platforms which normally make use of
847 ROM-able zImage formats normally set this to a suitable
848 value in their defconfig file.
850 If ZBOOT_ROM is not enabled, this has no effect.
853 hex "Compressed ROM boot loader BSS address"
856 The base address of an area of read/write memory in the target
857 for the ROM-able zImage which must be available while the
858 decompressor is running. It must be large enough to hold the
859 entire decompressed kernel plus an additional 128 KiB.
860 Platforms which normally make use of ROM-able zImage formats
861 normally set this to a suitable value in their defconfig file.
863 If ZBOOT_ROM is not enabled, this has no effect.
866 bool "Compressed boot loader in ROM/flash"
867 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
869 Say Y here if you intend to execute your compressed kernel image
870 (zImage) directly from ROM or flash. If unsure, say N.
873 string "Default kernel command string"
876 On some architectures (EBSA110 and CATS), there is currently no way
877 for the boot loader to pass arguments to the kernel. For these
878 architectures, you should supply some command-line options at build
879 time by entering them here. As a minimum, you should specify the
880 memory size and the root device (e.g., mem=64M root=/dev/nfs).
883 bool "Kernel Execute-In-Place from ROM"
884 depends on !ZBOOT_ROM
886 Execute-In-Place allows the kernel to run from non-volatile storage
887 directly addressable by the CPU, such as NOR flash. This saves RAM
888 space since the text section of the kernel is not loaded from flash
889 to RAM. Read-write sections, such as the data section and stack,
890 are still copied to RAM. The XIP kernel is not compressed since
891 it has to run directly from flash, so it will take more space to
892 store it. The flash address used to link the kernel object files,
893 and for storing it, is configuration dependent. Therefore, if you
894 say Y here, you must know the proper physical address where to
895 store the kernel image depending on your own flash memory usage.
897 Also note that the make target becomes "make xipImage" rather than
898 "make zImage" or "make Image". The final kernel binary to put in
899 ROM memory will be arch/arm/boot/xipImage.
904 hex "XIP Kernel Physical Location"
905 depends on XIP_KERNEL
908 This is the physical address in your flash memory the kernel will
909 be linked for and stored to. This address is dependent on your
913 bool "Kexec system call (EXPERIMENTAL)"
914 depends on EXPERIMENTAL
916 kexec is a system call that implements the ability to shutdown your
917 current kernel, and to start another kernel. It is like a reboot
918 but it is independent of the system firmware. And like a reboot
919 you can start any kernel with it, not just Linux.
921 It is an ongoing process to be certain the hardware in a machine
922 is properly shutdown, so do not be surprised if this code does not
923 initially work for you. It may help to enable device hotplugging
927 bool "Export atags in procfs"
930 Should the atags used to boot the kernel be exported in an "atags"
931 file in procfs. Useful with kexec.
935 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
937 menu "CPU Frequency scaling"
939 source "drivers/cpufreq/Kconfig"
941 config CPU_FREQ_SA1100
943 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
946 config CPU_FREQ_SA1110
948 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
951 config CPU_FREQ_INTEGRATOR
952 tristate "CPUfreq driver for ARM Integrator CPUs"
953 depends on ARCH_INTEGRATOR && CPU_FREQ
956 This enables the CPUfreq driver for ARM Integrator CPUs.
958 For details, take a look at <file:Documentation/cpu-freq>.
963 tristate "CPUfreq driver for i.MX CPUs"
964 depends on ARCH_IMX && CPU_FREQ
967 This enables the CPUfreq driver for i.MX CPUs.
973 depends on CPU_FREQ && ARCH_PXA && PXA25x
975 select CPU_FREQ_DEFAULT_GOV_USERSPACE
981 menu "Floating point emulation"
983 comment "At least one emulation must be selected"
986 bool "NWFPE math emulation"
987 depends on !AEABI || OABI_COMPAT
989 Say Y to include the NWFPE floating point emulator in the kernel.
990 This is necessary to run most binaries. Linux does not currently
991 support floating point hardware so you need to say Y here even if
992 your machine has an FPA or floating point co-processor podule.
994 You may say N here if you are going to load the Acorn FPEmulator
998 bool "Support extended precision"
1001 Say Y to include 80-bit support in the kernel floating-point
1002 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1003 Note that gcc does not generate 80-bit operations by default,
1004 so in most cases this option only enlarges the size of the
1005 floating point emulator without any good reason.
1007 You almost surely want to say N here.
1010 bool "FastFPE math emulation (EXPERIMENTAL)"
1011 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1013 Say Y here to include the FAST floating point emulator in the kernel.
1014 This is an experimental much faster emulator which now also has full
1015 precision for the mantissa. It does not support any exceptions.
1016 It is very simple, and approximately 3-6 times faster than NWFPE.
1018 It should be sufficient for most programs. It may be not suitable
1019 for scientific calculations, but you have to check this for yourself.
1020 If you do not feel you need a faster FP emulation you should better
1024 bool "VFP-format floating point maths"
1025 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1027 Say Y to include VFP support code in the kernel. This is needed
1028 if your hardware includes a VFP unit.
1030 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1031 release notes and additional status information.
1033 Say N if your target does not have VFP hardware.
1041 bool "Advanced SIMD (NEON) Extension support"
1042 depends on VFPv3 && CPU_V7
1044 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1049 menu "Userspace binary formats"
1051 source "fs/Kconfig.binfmt"
1054 tristate "RISC OS personality"
1057 Say Y here to include the kernel code necessary if you want to run
1058 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1059 experimental; if this sounds frightening, say N and sleep in peace.
1060 You can also say M here to compile this support as a module (which
1061 will be called arthur).
1065 menu "Power management options"
1067 source "kernel/power/Kconfig"
1069 config ARCH_SUSPEND_POSSIBLE
1074 source "net/Kconfig"
1076 menu "Device Drivers"
1078 source "drivers/base/Kconfig"
1080 source "drivers/connector/Kconfig"
1082 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1083 source "drivers/mtd/Kconfig"
1086 source "drivers/parport/Kconfig"
1088 source "drivers/pnp/Kconfig"
1090 source "drivers/block/Kconfig"
1092 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1094 source "drivers/misc/Kconfig"
1096 if PCMCIA || ARCH_CLPS7500 || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX \
1097 || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
1098 || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE \
1100 source "drivers/ide/Kconfig"
1103 source "drivers/scsi/Kconfig"
1105 source "drivers/ata/Kconfig"
1107 source "drivers/md/Kconfig"
1109 source "drivers/message/fusion/Kconfig"
1111 source "drivers/ieee1394/Kconfig"
1113 source "drivers/message/i2o/Kconfig"
1115 source "drivers/net/Kconfig"
1117 source "drivers/isdn/Kconfig"
1119 # input before char - char/joystick depends on it. As does USB.
1121 source "drivers/input/Kconfig"
1123 source "drivers/char/Kconfig"
1125 source "drivers/i2c/Kconfig"
1127 source "drivers/spi/Kconfig"
1129 source "drivers/gpio/Kconfig"
1131 source "drivers/w1/Kconfig"
1133 source "drivers/power/Kconfig"
1135 source "drivers/hwmon/Kconfig"
1137 source "drivers/watchdog/Kconfig"
1139 source "drivers/ssb/Kconfig"
1141 #source "drivers/l3/Kconfig"
1143 source "drivers/mfd/Kconfig"
1145 source "drivers/media/Kconfig"
1147 source "drivers/video/Kconfig"
1149 source "sound/Kconfig"
1151 source "drivers/hid/Kconfig"
1153 source "drivers/usb/Kconfig"
1155 source "drivers/mmc/Kconfig"
1157 source "drivers/leds/Kconfig"
1159 source "drivers/rtc/Kconfig"
1161 source "drivers/dma/Kconfig"
1163 source "drivers/dca/Kconfig"
1169 source "arch/arm/Kconfig.debug"
1171 source "security/Kconfig"
1173 source "crypto/Kconfig"
1175 source "lib/Kconfig"