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)
15 select HAVE_KRETPROBES if (HAVE_KPROBES)
17 The ARM series is a line of low-power-consumption RISC chip designs
18 licensed by ARM Ltd and targeted at embedded applications and
19 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
20 manufactured, but legacy ARM-based PC hardware remains popular in
21 Europe. There is an ARM Linux project with a web page at
22 <http://www.arm.linux.org.uk/>.
24 config SYS_SUPPORTS_APM_EMULATION
35 config GENERIC_CLOCKEVENTS
39 config GENERIC_CLOCKEVENTS_BROADCAST
41 depends on GENERIC_CLOCKEVENTS
42 default y if SMP && !LOCAL_TIMERS
55 The Extended Industry Standard Architecture (EISA) bus was
56 developed as an open alternative to the IBM MicroChannel bus.
58 The EISA bus provided some of the features of the IBM MicroChannel
59 bus while maintaining backward compatibility with cards made for
60 the older ISA bus. The EISA bus saw limited use between 1988 and
61 1995 when it was made obsolete by the PCI bus.
63 Say Y here if you are building a kernel for an EISA-based machine.
73 MicroChannel Architecture is found in some IBM PS/2 machines and
74 laptops. It is a bus system similar to PCI or ISA. See
75 <file:Documentation/mca.txt> (and especially the web page given
76 there) before attempting to build an MCA bus kernel.
78 config GENERIC_HARDIRQS
82 config STACKTRACE_SUPPORT
86 config LOCKDEP_SUPPORT
90 config TRACE_IRQFLAGS_SUPPORT
94 config HARDIRQS_SW_RESEND
98 config GENERIC_IRQ_PROBE
102 config GENERIC_LOCKBREAK
105 depends on SMP && PREEMPT
107 config RWSEM_GENERIC_SPINLOCK
111 config RWSEM_XCHGADD_ALGORITHM
114 config ARCH_HAS_ILOG2_U32
118 config ARCH_HAS_ILOG2_U64
122 config GENERIC_HWEIGHT
126 config GENERIC_CALIBRATE_DELAY
130 config ARCH_SUPPORTS_AOUT
133 config ARCH_MAY_HAVE_PC_FDC
140 config GENERIC_ISA_DMA
151 config OPROFILE_ARMV6
153 depends on CPU_V6 && !SMP
154 select OPROFILE_ARM11_CORE
156 config OPROFILE_MPCORE
158 depends on CPU_V6 && SMP
159 select OPROFILE_ARM11_CORE
161 config OPROFILE_ARM11_CORE
168 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
169 default DRAM_BASE if REMAP_VECTORS_TO_RAM
172 The base address of exception vectors.
174 source "init/Kconfig"
179 prompt "ARM system type"
180 default ARCH_VERSATILE
183 bool "Agilent AAEC-2000 based"
186 This enables support for systems based on the Agilent AAEC-2000
188 config ARCH_INTEGRATOR
189 bool "ARM Ltd. Integrator family"
193 Support for ARM's Integrator platform.
196 bool "ARM Ltd. RealView family"
200 select GENERIC_CLOCKEVENTS
202 This enables support for ARM Ltd RealView boards.
204 config ARCH_VERSATILE
205 bool "ARM Ltd. Versatile family"
210 select GENERIC_CLOCKEVENTS
212 This enables support for ARM Ltd Versatile board.
218 This enables support for systems based on the Atmel AT91RM9200,
219 AT91SAM9 and AT91CAP9 processors.
222 bool "Cirrus CL-PS7500FE"
228 Support for the Cirrus Logic PS7500FE system-on-a-chip.
231 bool "Cirrus Logic CLPS711x/EP721x-based"
233 Support for Cirrus Logic 711x/721x based boards.
240 This is an evaluation board for the StrongARM processor available
241 from Digital. It has limited hardware on-board, including an
242 Ethernet interface, two PCMCIA sockets, two serial ports and a
251 This enables support for the Cirrus EP93xx series of CPUs.
253 config ARCH_FOOTBRIDGE
258 Support for systems based on the DC21285 companion chip
259 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
262 bool "Hilscher NetX based"
265 This enables support for systems based on the Hilscher NetX Soc
268 bool "Hynix HMS720x-based"
271 This enables support for systems based on the Hynix HMS720x
277 select GENERIC_CLOCKEVENTS
279 Support for Motorola's i.MX family of processors (MX1, MXL).
286 select ARCH_SUPPORTS_MSI
288 Support for Intel's IOP13XX (XScale) family of processors.
297 Support for Intel's 80219 and IOP32X (XScale) family of
307 Support for Intel's IOP33X (XScale) family of processors.
315 Support for Intel's IXP23xx (XScale) family of processors.
318 bool "IXP2400/2800-based"
322 Support for Intel's IXP2400/2800 (XScale) family of processors.
329 select GENERIC_CLOCKEVENTS
332 Support for Intel's IXP4XX (XScale) family of processors.
339 Say Y here if you intend to run this kernel on a LinkUp Systems
340 L7200 Software Development Board which uses an ARM720T processor.
341 Information on this board can be obtained at:
343 <http://www.linkupsys.com/>
345 If you have any questions or comments about the Linux kernel port
346 to this board, send e-mail to <sjhill@cotw.com>.
349 bool "Micrel/Kendin KS8695"
352 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
353 System-on-Chip devices.
356 bool "NetSilicon NS9xxx"
359 select GENERIC_CLOCKEVENTS
361 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
364 <http://www.digi.com/products/microprocessors/index.jsp>
367 bool "Freescale MXC/iMX-based"
370 Support for Freescale MXC/iMX-based family of processors
378 select GENERIC_CLOCKEVENTS
380 Support for Marvell Orion System on Chip family.
383 bool "Philips Nexperia PNX4008 Mobile"
385 This enables support for Philips PNX4008 mobile platform.
388 bool "PXA2xx/PXA3xx-based"
395 select GENERIC_CLOCKEVENTS
398 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
405 select ARCH_MAY_HAVE_PC_FDC
410 On the Acorn Risc-PC, Linux can support the internal IDE disk and
411 CD-ROM interface, serial and parallel port, and the floppy drive.
416 select ARCH_DISCONTIGMEM_ENABLE
422 Support for StrongARM 11x0 based boards.
425 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
429 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
430 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
431 the Samsung SMDK2410 development board (and derivatives).
440 Support for the StrongARM based Digital DNARD machine, also known
441 as "Shark" (<http://www.shark-linux.de/shark.html>).
447 Say Y here for systems based on one of the Sharp LH7A40X
448 System on a Chip processors. These CPUs include an ARM922T
449 core with a wide array of integrated devices for
450 hand-held and low-power applications.
455 select GENERIC_CLOCKEVENTS
458 Support for TI's DaVinci platform.
464 select GENERIC_CLOCKEVENTS
466 Support for TI's OMAP platform (OMAP1 and OMAP2).
469 bool "Qualcomm MSM7X00A"
471 select GENERIC_CLOCKEVENTS
473 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
474 apps processor of the MSM7X00A and depends on a shared memory
475 interface to the ARM9 modem processor which runs the baseband stack
476 and controls some vital subsystems (clock and power control, etc).
477 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
481 source "arch/arm/mach-clps711x/Kconfig"
483 source "arch/arm/mach-ep93xx/Kconfig"
485 source "arch/arm/mach-footbridge/Kconfig"
487 source "arch/arm/mach-integrator/Kconfig"
489 source "arch/arm/mach-iop32x/Kconfig"
491 source "arch/arm/mach-iop33x/Kconfig"
493 source "arch/arm/mach-iop13xx/Kconfig"
495 source "arch/arm/mach-ixp4xx/Kconfig"
497 source "arch/arm/mach-ixp2000/Kconfig"
499 source "arch/arm/mach-ixp23xx/Kconfig"
501 source "arch/arm/mach-pxa/Kconfig"
503 source "arch/arm/mach-sa1100/Kconfig"
505 source "arch/arm/plat-omap/Kconfig"
507 source "arch/arm/mach-omap1/Kconfig"
509 source "arch/arm/mach-omap2/Kconfig"
511 source "arch/arm/mach-orion/Kconfig"
513 source "arch/arm/plat-s3c24xx/Kconfig"
514 source "arch/arm/plat-s3c/Kconfig"
517 source "arch/arm/mach-s3c2400/Kconfig"
518 source "arch/arm/mach-s3c2410/Kconfig"
519 source "arch/arm/mach-s3c2412/Kconfig"
520 source "arch/arm/mach-s3c2440/Kconfig"
521 source "arch/arm/mach-s3c2442/Kconfig"
522 source "arch/arm/mach-s3c2443/Kconfig"
525 source "arch/arm/mach-lh7a40x/Kconfig"
527 source "arch/arm/mach-imx/Kconfig"
529 source "arch/arm/mach-h720x/Kconfig"
531 source "arch/arm/mach-versatile/Kconfig"
533 source "arch/arm/mach-aaec2000/Kconfig"
535 source "arch/arm/mach-realview/Kconfig"
537 source "arch/arm/mach-at91/Kconfig"
539 source "arch/arm/plat-mxc/Kconfig"
541 source "arch/arm/mach-netx/Kconfig"
543 source "arch/arm/mach-ns9xxx/Kconfig"
545 source "arch/arm/mach-davinci/Kconfig"
547 source "arch/arm/mach-ks8695/Kconfig"
549 source "arch/arm/mach-msm/Kconfig"
551 # Definitions to make life easier
558 source arch/arm/mm/Kconfig
561 bool "Enable iWMMXt support"
562 depends on CPU_XSCALE || CPU_XSC3
563 default y if PXA27x || PXA3xx
565 Enable support for iWMMXt context switching at run time if
566 running on a CPU that supports it.
568 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
571 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
575 source "arch/arm/Kconfig-nommu"
580 source "arch/arm/common/Kconfig"
582 config FORCE_MAX_ZONEORDER
595 Find out whether you have ISA slots on your motherboard. ISA is the
596 name of a bus system, i.e. the way the CPU talks to the other stuff
597 inside your box. Other bus systems are PCI, EISA, MicroChannel
598 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
599 newer boards don't support it. If you have ISA, say Y, otherwise N.
601 # Select ISA DMA controller support
606 # Select ISA DMA interface
611 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
613 Find out whether you have a PCI motherboard. PCI is the name of a
614 bus system, i.e. the way the CPU talks to the other stuff inside
615 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
616 VESA. If you have PCI, say Y, otherwise N.
621 # Select the host bridge type
622 config PCI_HOST_VIA82C505
624 depends on PCI && ARCH_SHARK
627 config PCI_HOST_ITE8152
629 depends on PCI && MACH_ARMCORE
633 source "drivers/pci/Kconfig"
635 source "drivers/pcmcia/Kconfig"
639 menu "Kernel Features"
641 source "kernel/time/Kconfig"
644 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
645 depends on EXPERIMENTAL && REALVIEW_EB_ARM11MP
647 This enables support for systems with more than one CPU. If you have
648 a system with only one CPU, like most personal computers, say N. If
649 you have a system with more than one CPU, say Y.
651 If you say N here, the kernel will run on single and multiprocessor
652 machines, but will use only one CPU of a multiprocessor machine. If
653 you say Y here, the kernel will run on many, but not all, single
654 processor machines. On a single processor machine, the kernel will
655 run faster if you say N here.
657 See also <file:Documentation/i386/IO-APIC.txt>,
658 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
659 <http://www.linuxdoc.org/docs.html#howto>.
661 If you don't know what to do here, say N.
664 int "Maximum number of CPUs (2-32)"
670 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
671 depends on SMP && HOTPLUG && EXPERIMENTAL
673 Say Y here to experiment with turning CPUs off and on. CPUs
674 can be controlled through /sys/devices/system/cpu.
677 bool "Use local timer interrupts"
678 depends on SMP && REALVIEW_EB_ARM11MP
681 Enable support for local timers on SMP platforms, rather then the
682 legacy IPI broadcast method. Local timers allows the system
683 accounting to be spread across the timer interval, preventing a
684 "thundering herd" at every timer tick.
687 bool "Preemptible Kernel (EXPERIMENTAL)"
688 depends on EXPERIMENTAL
690 This option reduces the latency of the kernel when reacting to
691 real-time or interactive events by allowing a low priority process to
692 be preempted even if it is in kernel mode executing a system call.
693 This allows applications to run more reliably even when the system is
696 Say Y here if you are building a kernel for a desktop, embedded
697 or real-time system. Say N if you are unsure.
700 bool "Dynamic tick timer"
701 depends on !GENERIC_CLOCKEVENTS
703 Select this option if you want to disable continuous timer ticks
704 and have them programmed to occur as required. This option saves
705 power as the system can remain in idle state for longer.
707 By default dynamic tick is disabled during the boot, and can be
708 manually enabled with:
710 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
712 Alternatively, if you want dynamic tick automatically enabled
713 during boot, pass "dyntick=enable" via the kernel command string.
715 Please note that dynamic tick may affect the accuracy of
716 timekeeping on some platforms depending on the implementation.
717 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
718 to have accurate timekeeping with dynamic tick.
722 default 128 if ARCH_L7200
723 default 200 if ARCH_EBSA110 || ARCH_S3C2410
724 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
725 default AT91_TIMER_HZ if ARCH_AT91
729 bool "Use the ARM EABI to compile the kernel"
731 This option allows for the kernel to be compiled using the latest
732 ARM ABI (aka EABI). This is only useful if you are using a user
733 space environment that is also compiled with EABI.
735 Since there are major incompatibilities between the legacy ABI and
736 EABI, especially with regard to structure member alignment, this
737 option also changes the kernel syscall calling convention to
738 disambiguate both ABIs and allow for backward compatibility support
739 (selected with CONFIG_OABI_COMPAT).
741 To use this you need GCC version 4.0.0 or later.
744 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
745 depends on AEABI && EXPERIMENTAL
748 This option preserves the old syscall interface along with the
749 new (ARM EABI) one. It also provides a compatibility layer to
750 intercept syscalls that have structure arguments which layout
751 in memory differs between the legacy ABI and the new ARM EABI
752 (only for non "thumb" binaries). This option adds a tiny
753 overhead to all syscalls and produces a slightly larger kernel.
754 If you know you'll be using only pure EABI user space then you
755 can say N here. If this option is not selected and you attempt
756 to execute a legacy ABI binary then the result will be
757 UNPREDICTABLE (in fact it can be predicted that it won't work
758 at all). If in doubt say Y.
760 config ARCH_DISCONTIGMEM_ENABLE
762 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
764 Say Y to support efficient handling of discontiguous physical memory,
765 for architectures which are either NUMA (Non-Uniform Memory Access)
766 or have huge holes in the physical address space for other reasons.
767 See <file:Documentation/vm/numa> for more.
771 default "4" if ARCH_LH7A40X
773 depends on NEED_MULTIPLE_NODES
778 bool "Timer and CPU usage LEDs"
779 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
780 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
781 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
782 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
783 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
784 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
785 ARCH_KS8695 || MACH_RD88F5182
787 If you say Y here, the LEDs on your machine will be used
788 to provide useful information about your current system status.
790 If you are compiling a kernel for a NetWinder or EBSA-285, you will
791 be able to select which LEDs are active using the options below. If
792 you are compiling a kernel for the EBSA-110 or the LART however, the
793 red LED will simply flash regularly to indicate that the system is
794 still functional. It is safe to say Y here if you have a CATS
795 system, but the driver will do nothing.
798 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
799 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
800 || MACH_OMAP_PERSEUS2
802 depends on !GENERIC_CLOCKEVENTS
803 default y if ARCH_EBSA110
805 If you say Y here, one of the system LEDs (the green one on the
806 NetWinder, the amber one on the EBSA285, or the red one on the LART)
807 will flash regularly to indicate that the system is still
808 operational. This is mainly useful to kernel hackers who are
809 debugging unstable kernels.
811 The LART uses the same LED for both Timer LED and CPU usage LED
812 functions. You may choose to use both, but the Timer LED function
813 will overrule the CPU usage LED.
816 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
818 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
819 || MACH_OMAP_PERSEUS2
822 If you say Y here, the red LED will be used to give a good real
823 time indication of CPU usage, by lighting whenever the idle task
824 is not currently executing.
826 The LART uses the same LED for both Timer LED and CPU usage LED
827 functions. You may choose to use both, but the Timer LED function
828 will overrule the CPU usage LED.
830 config ALIGNMENT_TRAP
832 depends on CPU_CP15_MMU
833 default y if !ARCH_EBSA110
835 ARM processors cannot fetch/store information which is not
836 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
837 address divisible by 4. On 32-bit ARM processors, these non-aligned
838 fetch/store instructions will be emulated in software if you say
839 here, which has a severe performance impact. This is necessary for
840 correct operation of some network protocols. With an IP-only
841 configuration it is safe to say N, otherwise say Y.
847 # Compressed boot loader in ROM. Yes, we really want to ask about
848 # TEXT and BSS so we preserve their values in the config files.
849 config ZBOOT_ROM_TEXT
850 hex "Compressed ROM boot loader base address"
853 The physical address at which the ROM-able zImage is to be
854 placed in the target. Platforms which normally make use of
855 ROM-able zImage formats normally set this to a suitable
856 value in their defconfig file.
858 If ZBOOT_ROM is not enabled, this has no effect.
861 hex "Compressed ROM boot loader BSS address"
864 The base address of an area of read/write memory in the target
865 for the ROM-able zImage which must be available while the
866 decompressor is running. It must be large enough to hold the
867 entire decompressed kernel plus an additional 128 KiB.
868 Platforms which normally make use of ROM-able zImage formats
869 normally set this to a suitable value in their defconfig file.
871 If ZBOOT_ROM is not enabled, this has no effect.
874 bool "Compressed boot loader in ROM/flash"
875 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
877 Say Y here if you intend to execute your compressed kernel image
878 (zImage) directly from ROM or flash. If unsure, say N.
881 string "Default kernel command string"
884 On some architectures (EBSA110 and CATS), there is currently no way
885 for the boot loader to pass arguments to the kernel. For these
886 architectures, you should supply some command-line options at build
887 time by entering them here. As a minimum, you should specify the
888 memory size and the root device (e.g., mem=64M root=/dev/nfs).
891 bool "Kernel Execute-In-Place from ROM"
892 depends on !ZBOOT_ROM
894 Execute-In-Place allows the kernel to run from non-volatile storage
895 directly addressable by the CPU, such as NOR flash. This saves RAM
896 space since the text section of the kernel is not loaded from flash
897 to RAM. Read-write sections, such as the data section and stack,
898 are still copied to RAM. The XIP kernel is not compressed since
899 it has to run directly from flash, so it will take more space to
900 store it. The flash address used to link the kernel object files,
901 and for storing it, is configuration dependent. Therefore, if you
902 say Y here, you must know the proper physical address where to
903 store the kernel image depending on your own flash memory usage.
905 Also note that the make target becomes "make xipImage" rather than
906 "make zImage" or "make Image". The final kernel binary to put in
907 ROM memory will be arch/arm/boot/xipImage.
912 hex "XIP Kernel Physical Location"
913 depends on XIP_KERNEL
916 This is the physical address in your flash memory the kernel will
917 be linked for and stored to. This address is dependent on your
921 bool "Kexec system call (EXPERIMENTAL)"
922 depends on EXPERIMENTAL
924 kexec is a system call that implements the ability to shutdown your
925 current kernel, and to start another kernel. It is like a reboot
926 but it is independent of the system firmware. And like a reboot
927 you can start any kernel with it, not just Linux.
929 It is an ongoing process to be certain the hardware in a machine
930 is properly shutdown, so do not be surprised if this code does not
931 initially work for you. It may help to enable device hotplugging
935 bool "Export atags in procfs"
939 Should the atags used to boot the kernel be exported in an "atags"
940 file in procfs. Useful with kexec.
944 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
946 menu "CPU Frequency scaling"
948 source "drivers/cpufreq/Kconfig"
950 config CPU_FREQ_SA1100
952 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
955 config CPU_FREQ_SA1110
957 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
960 config CPU_FREQ_INTEGRATOR
961 tristate "CPUfreq driver for ARM Integrator CPUs"
962 depends on ARCH_INTEGRATOR && CPU_FREQ
965 This enables the CPUfreq driver for ARM Integrator CPUs.
967 For details, take a look at <file:Documentation/cpu-freq>.
972 tristate "CPUfreq driver for i.MX CPUs"
973 depends on ARCH_IMX && CPU_FREQ
976 This enables the CPUfreq driver for i.MX CPUs.
982 depends on CPU_FREQ && ARCH_PXA && PXA25x
984 select CPU_FREQ_DEFAULT_GOV_USERSPACE
990 menu "Floating point emulation"
992 comment "At least one emulation must be selected"
995 bool "NWFPE math emulation"
996 depends on !AEABI || OABI_COMPAT
998 Say Y to include the NWFPE floating point emulator in the kernel.
999 This is necessary to run most binaries. Linux does not currently
1000 support floating point hardware so you need to say Y here even if
1001 your machine has an FPA or floating point co-processor podule.
1003 You may say N here if you are going to load the Acorn FPEmulator
1004 early in the bootup.
1007 bool "Support extended precision"
1008 depends on FPE_NWFPE
1010 Say Y to include 80-bit support in the kernel floating-point
1011 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1012 Note that gcc does not generate 80-bit operations by default,
1013 so in most cases this option only enlarges the size of the
1014 floating point emulator without any good reason.
1016 You almost surely want to say N here.
1019 bool "FastFPE math emulation (EXPERIMENTAL)"
1020 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1022 Say Y here to include the FAST floating point emulator in the kernel.
1023 This is an experimental much faster emulator which now also has full
1024 precision for the mantissa. It does not support any exceptions.
1025 It is very simple, and approximately 3-6 times faster than NWFPE.
1027 It should be sufficient for most programs. It may be not suitable
1028 for scientific calculations, but you have to check this for yourself.
1029 If you do not feel you need a faster FP emulation you should better
1033 bool "VFP-format floating point maths"
1034 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1036 Say Y to include VFP support code in the kernel. This is needed
1037 if your hardware includes a VFP unit.
1039 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1040 release notes and additional status information.
1042 Say N if your target does not have VFP hardware.
1050 bool "Advanced SIMD (NEON) Extension support"
1051 depends on VFPv3 && CPU_V7
1053 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1058 menu "Userspace binary formats"
1060 source "fs/Kconfig.binfmt"
1063 tristate "RISC OS personality"
1066 Say Y here to include the kernel code necessary if you want to run
1067 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1068 experimental; if this sounds frightening, say N and sleep in peace.
1069 You can also say M here to compile this support as a module (which
1070 will be called arthur).
1074 menu "Power management options"
1076 source "kernel/power/Kconfig"
1078 config ARCH_SUSPEND_POSSIBLE
1083 source "net/Kconfig"
1085 menu "Device Drivers"
1087 source "drivers/base/Kconfig"
1089 source "drivers/connector/Kconfig"
1091 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1092 source "drivers/mtd/Kconfig"
1095 source "drivers/parport/Kconfig"
1097 source "drivers/pnp/Kconfig"
1099 source "drivers/block/Kconfig"
1101 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1103 source "drivers/misc/Kconfig"
1105 source "drivers/ide/Kconfig"
1107 source "drivers/scsi/Kconfig"
1109 source "drivers/ata/Kconfig"
1111 source "drivers/md/Kconfig"
1113 source "drivers/message/fusion/Kconfig"
1115 source "drivers/ieee1394/Kconfig"
1117 source "drivers/message/i2o/Kconfig"
1119 source "drivers/net/Kconfig"
1121 source "drivers/isdn/Kconfig"
1123 # input before char - char/joystick depends on it. As does USB.
1125 source "drivers/input/Kconfig"
1127 source "drivers/char/Kconfig"
1129 source "drivers/i2c/Kconfig"
1131 source "drivers/spi/Kconfig"
1133 source "drivers/gpio/Kconfig"
1135 source "drivers/w1/Kconfig"
1137 source "drivers/power/Kconfig"
1139 source "drivers/hwmon/Kconfig"
1141 source "drivers/watchdog/Kconfig"
1143 source "drivers/ssb/Kconfig"
1145 #source "drivers/l3/Kconfig"
1147 source "drivers/mfd/Kconfig"
1149 source "drivers/media/Kconfig"
1151 source "drivers/video/Kconfig"
1153 source "sound/Kconfig"
1155 source "drivers/hid/Kconfig"
1157 source "drivers/usb/Kconfig"
1159 source "drivers/mmc/Kconfig"
1161 source "drivers/leds/Kconfig"
1163 source "drivers/rtc/Kconfig"
1165 source "drivers/dma/Kconfig"
1167 source "drivers/dca/Kconfig"
1173 source "arch/arm/Kconfig.debug"
1175 source "security/Kconfig"
1177 source "crypto/Kconfig"
1179 source "lib/Kconfig"