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.
238 select FOOTBRIDGE_ADDIN
241 Support for Intel's EBSA285 companion chip.
248 This is an evaluation board for the StrongARM processor available
249 from Digital. It has limited hardware on-board, including an
250 Ethernet interface, two PCMCIA sockets, two serial ports and a
260 This enables support for the Cirrus EP93xx series of CPUs.
262 config ARCH_FOOTBRIDGE
267 Support for systems based on the DC21285 companion chip
268 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
271 bool "Hilscher NetX based"
274 This enables support for systems based on the Hilscher NetX Soc
277 bool "Hynix HMS720x-based"
280 This enables support for systems based on the Hynix HMS720x
286 select GENERIC_CLOCKEVENTS
288 Support for Motorola's i.MX family of processors (MX1, MXL).
295 select ARCH_SUPPORTS_MSI
297 Support for Intel's IOP13XX (XScale) family of processors.
306 Support for Intel's 80219 and IOP32X (XScale) family of
316 Support for Intel's IOP33X (XScale) family of processors.
324 Support for Intel's IXP23xx (XScale) family of processors.
327 bool "IXP2400/2800-based"
331 Support for Intel's IXP2400/2800 (XScale) family of processors.
338 select GENERIC_CLOCKEVENTS
341 Support for Intel's IXP4XX (XScale) family of processors.
348 Say Y here if you intend to run this kernel on a LinkUp Systems
349 L7200 Software Development Board which uses an ARM720T processor.
350 Information on this board can be obtained at:
352 <http://www.linkupsys.com/>
354 If you have any questions or comments about the Linux kernel port
355 to this board, send e-mail to <sjhill@cotw.com>.
358 bool "Micrel/Kendin KS8695"
361 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
362 System-on-Chip devices.
365 bool "NetSilicon NS9xxx"
368 select GENERIC_CLOCKEVENTS
370 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
373 <http://www.digi.com/products/microprocessors/index.jsp>
376 bool "Freescale MXC/iMX-based"
379 Support for Freescale MXC/iMX-based family of processors
387 select GENERIC_CLOCKEVENTS
390 Support for the following Marvell Orion 5x series SoCs:
391 Orion-1 (5181), Orion-NAS (5182), Orion-2 (5281.)
394 bool "Philips Nexperia PNX4008 Mobile"
396 This enables support for Philips PNX4008 mobile platform.
399 bool "PXA2xx/PXA3xx-based"
406 select GENERIC_CLOCKEVENTS
409 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
416 select ARCH_MAY_HAVE_PC_FDC
421 On the Acorn Risc-PC, Linux can support the internal IDE disk and
422 CD-ROM interface, serial and parallel port, and the floppy drive.
427 select ARCH_DISCONTIGMEM_ENABLE
428 select ARCH_SPARSEMEM_ENABLE
429 select ARCH_SELECT_MEMORY_MODEL
433 select GENERIC_CLOCKEVENTS
438 Support for StrongARM 11x0 based boards.
441 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
445 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
446 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
447 the Samsung SMDK2410 development board (and derivatives).
456 Support for the StrongARM based Digital DNARD machine, also known
457 as "Shark" (<http://www.shark-linux.de/shark.html>).
463 Say Y here for systems based on one of the Sharp LH7A40X
464 System on a Chip processors. These CPUs include an ARM922T
465 core with a wide array of integrated devices for
466 hand-held and low-power applications.
471 select GENERIC_CLOCKEVENTS
474 Support for TI's DaVinci platform.
481 select GENERIC_CLOCKEVENTS
483 Support for TI's OMAP platform (OMAP1 and OMAP2).
486 bool "Qualcomm MSM7X00A"
488 select GENERIC_CLOCKEVENTS
490 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
491 apps processor of the MSM7X00A and depends on a shared memory
492 interface to the ARM9 modem processor which runs the baseband stack
493 and controls some vital subsystems (clock and power control, etc).
494 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
498 source "arch/arm/mach-clps711x/Kconfig"
500 source "arch/arm/mach-ep93xx/Kconfig"
502 source "arch/arm/mach-footbridge/Kconfig"
504 source "arch/arm/mach-integrator/Kconfig"
506 source "arch/arm/mach-iop32x/Kconfig"
508 source "arch/arm/mach-iop33x/Kconfig"
510 source "arch/arm/mach-iop13xx/Kconfig"
512 source "arch/arm/mach-ixp4xx/Kconfig"
514 source "arch/arm/mach-ixp2000/Kconfig"
516 source "arch/arm/mach-ixp23xx/Kconfig"
518 source "arch/arm/mach-pxa/Kconfig"
520 source "arch/arm/mach-sa1100/Kconfig"
522 source "arch/arm/plat-omap/Kconfig"
524 source "arch/arm/mach-omap1/Kconfig"
526 source "arch/arm/mach-omap2/Kconfig"
528 source "arch/arm/mach-orion5x/Kconfig"
530 source "arch/arm/plat-s3c24xx/Kconfig"
531 source "arch/arm/plat-s3c/Kconfig"
534 source "arch/arm/mach-s3c2400/Kconfig"
535 source "arch/arm/mach-s3c2410/Kconfig"
536 source "arch/arm/mach-s3c2412/Kconfig"
537 source "arch/arm/mach-s3c2440/Kconfig"
538 source "arch/arm/mach-s3c2442/Kconfig"
539 source "arch/arm/mach-s3c2443/Kconfig"
542 source "arch/arm/mach-lh7a40x/Kconfig"
544 source "arch/arm/mach-imx/Kconfig"
546 source "arch/arm/mach-h720x/Kconfig"
548 source "arch/arm/mach-versatile/Kconfig"
550 source "arch/arm/mach-aaec2000/Kconfig"
552 source "arch/arm/mach-realview/Kconfig"
554 source "arch/arm/mach-at91/Kconfig"
556 source "arch/arm/plat-mxc/Kconfig"
558 source "arch/arm/mach-netx/Kconfig"
560 source "arch/arm/mach-ns9xxx/Kconfig"
562 source "arch/arm/mach-davinci/Kconfig"
564 source "arch/arm/mach-ks8695/Kconfig"
566 source "arch/arm/mach-msm/Kconfig"
568 # Definitions to make life easier
578 source arch/arm/mm/Kconfig
581 bool "Enable iWMMXt support"
582 depends on CPU_XSCALE || CPU_XSC3
583 default y if PXA27x || PXA3xx
585 Enable support for iWMMXt context switching at run time if
586 running on a CPU that supports it.
588 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
591 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
595 source "arch/arm/Kconfig-nommu"
600 source "arch/arm/common/Kconfig"
602 config FORCE_MAX_ZONEORDER
615 Find out whether you have ISA slots on your motherboard. ISA is the
616 name of a bus system, i.e. the way the CPU talks to the other stuff
617 inside your box. Other bus systems are PCI, EISA, MicroChannel
618 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
619 newer boards don't support it. If you have ISA, say Y, otherwise N.
621 # Select ISA DMA controller support
626 # Select ISA DMA interface
631 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
633 Find out whether you have a PCI motherboard. PCI is the name of a
634 bus system, i.e. the way the CPU talks to the other stuff inside
635 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
636 VESA. If you have PCI, say Y, otherwise N.
641 # Select the host bridge type
642 config PCI_HOST_VIA82C505
644 depends on PCI && ARCH_SHARK
647 config PCI_HOST_ITE8152
649 depends on PCI && MACH_ARMCORE
653 source "drivers/pci/Kconfig"
655 source "drivers/pcmcia/Kconfig"
659 menu "Kernel Features"
661 source "kernel/time/Kconfig"
664 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
665 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
667 This enables support for systems with more than one CPU. If you have
668 a system with only one CPU, like most personal computers, say N. If
669 you have a system with more than one CPU, say Y.
671 If you say N here, the kernel will run on single and multiprocessor
672 machines, but will use only one CPU of a multiprocessor machine. If
673 you say Y here, the kernel will run on many, but not all, single
674 processor machines. On a single processor machine, the kernel will
675 run faster if you say N here.
677 See also <file:Documentation/i386/IO-APIC.txt>,
678 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
679 <http://www.linuxdoc.org/docs.html#howto>.
681 If you don't know what to do here, say N.
684 int "Maximum number of CPUs (2-32)"
690 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
691 depends on SMP && HOTPLUG && EXPERIMENTAL
693 Say Y here to experiment with turning CPUs off and on. CPUs
694 can be controlled through /sys/devices/system/cpu.
697 bool "Use local timer interrupts"
698 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
701 Enable support for local timers on SMP platforms, rather then the
702 legacy IPI broadcast method. Local timers allows the system
703 accounting to be spread across the timer interval, preventing a
704 "thundering herd" at every timer tick.
707 bool "Preemptible Kernel (EXPERIMENTAL)"
708 depends on EXPERIMENTAL
710 This option reduces the latency of the kernel when reacting to
711 real-time or interactive events by allowing a low priority process to
712 be preempted even if it is in kernel mode executing a system call.
713 This allows applications to run more reliably even when the system is
716 Say Y here if you are building a kernel for a desktop, embedded
717 or real-time system. Say N if you are unsure.
720 bool "Dynamic tick timer"
721 depends on !GENERIC_CLOCKEVENTS
723 Select this option if you want to disable continuous timer ticks
724 and have them programmed to occur as required. This option saves
725 power as the system can remain in idle state for longer.
727 By default dynamic tick is disabled during the boot, and can be
728 manually enabled with:
730 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
732 Alternatively, if you want dynamic tick automatically enabled
733 during boot, pass "dyntick=enable" via the kernel command string.
735 Please note that dynamic tick may affect the accuracy of
736 timekeeping on some platforms depending on the implementation.
737 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
738 to have accurate timekeeping with dynamic tick.
742 default 128 if ARCH_L7200
743 default 200 if ARCH_EBSA110 || ARCH_S3C2410
744 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
745 default AT91_TIMER_HZ if ARCH_AT91
749 bool "Use the ARM EABI to compile the kernel"
751 This option allows for the kernel to be compiled using the latest
752 ARM ABI (aka EABI). This is only useful if you are using a user
753 space environment that is also compiled with EABI.
755 Since there are major incompatibilities between the legacy ABI and
756 EABI, especially with regard to structure member alignment, this
757 option also changes the kernel syscall calling convention to
758 disambiguate both ABIs and allow for backward compatibility support
759 (selected with CONFIG_OABI_COMPAT).
761 To use this you need GCC version 4.0.0 or later.
764 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
765 depends on AEABI && EXPERIMENTAL
768 This option preserves the old syscall interface along with the
769 new (ARM EABI) one. It also provides a compatibility layer to
770 intercept syscalls that have structure arguments which layout
771 in memory differs between the legacy ABI and the new ARM EABI
772 (only for non "thumb" binaries). This option adds a tiny
773 overhead to all syscalls and produces a slightly larger kernel.
774 If you know you'll be using only pure EABI user space then you
775 can say N here. If this option is not selected and you attempt
776 to execute a legacy ABI binary then the result will be
777 UNPREDICTABLE (in fact it can be predicted that it won't work
778 at all). If in doubt say Y.
780 config ARCH_DISCONTIGMEM_ENABLE
782 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
784 Say Y to support efficient handling of discontiguous physical memory,
785 for architectures which are either NUMA (Non-Uniform Memory Access)
786 or have huge holes in the physical address space for other reasons.
787 See <file:Documentation/vm/numa> for more.
789 config ARCH_SPARSEMEM_ENABLE
792 config ARCH_SELECT_MEMORY_MODEL
797 default "4" if ARCH_LH7A40X
799 depends on NEED_MULTIPLE_NODES
804 bool "Timer and CPU usage LEDs"
805 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
806 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
807 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
808 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
809 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
810 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
811 ARCH_KS8695 || MACH_RD88F5182
813 If you say Y here, the LEDs on your machine will be used
814 to provide useful information about your current system status.
816 If you are compiling a kernel for a NetWinder or EBSA-285, you will
817 be able to select which LEDs are active using the options below. If
818 you are compiling a kernel for the EBSA-110 or the LART however, the
819 red LED will simply flash regularly to indicate that the system is
820 still functional. It is safe to say Y here if you have a CATS
821 system, but the driver will do nothing.
824 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
825 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
826 || MACH_OMAP_PERSEUS2
828 depends on !GENERIC_CLOCKEVENTS
829 default y if ARCH_EBSA110
831 If you say Y here, one of the system LEDs (the green one on the
832 NetWinder, the amber one on the EBSA285, or the red one on the LART)
833 will flash regularly to indicate that the system is still
834 operational. This is mainly useful to kernel hackers who are
835 debugging unstable kernels.
837 The LART uses the same LED for both Timer LED and CPU usage LED
838 functions. You may choose to use both, but the Timer LED function
839 will overrule the CPU usage LED.
842 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
844 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
845 || MACH_OMAP_PERSEUS2
848 If you say Y here, the red LED will be used to give a good real
849 time indication of CPU usage, by lighting whenever the idle task
850 is not currently executing.
852 The LART uses the same LED for both Timer LED and CPU usage LED
853 functions. You may choose to use both, but the Timer LED function
854 will overrule the CPU usage LED.
856 config ALIGNMENT_TRAP
858 depends on CPU_CP15_MMU
859 default y if !ARCH_EBSA110
861 ARM processors cannot fetch/store information which is not
862 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
863 address divisible by 4. On 32-bit ARM processors, these non-aligned
864 fetch/store instructions will be emulated in software if you say
865 here, which has a severe performance impact. This is necessary for
866 correct operation of some network protocols. With an IP-only
867 configuration it is safe to say N, otherwise say Y.
873 # Compressed boot loader in ROM. Yes, we really want to ask about
874 # TEXT and BSS so we preserve their values in the config files.
875 config ZBOOT_ROM_TEXT
876 hex "Compressed ROM boot loader base address"
879 The physical address at which the ROM-able zImage is to be
880 placed in the target. Platforms which normally make use of
881 ROM-able zImage formats normally set this to a suitable
882 value in their defconfig file.
884 If ZBOOT_ROM is not enabled, this has no effect.
887 hex "Compressed ROM boot loader BSS address"
890 The base address of an area of read/write memory in the target
891 for the ROM-able zImage which must be available while the
892 decompressor is running. It must be large enough to hold the
893 entire decompressed kernel plus an additional 128 KiB.
894 Platforms which normally make use of ROM-able zImage formats
895 normally set this to a suitable value in their defconfig file.
897 If ZBOOT_ROM is not enabled, this has no effect.
900 bool "Compressed boot loader in ROM/flash"
901 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
903 Say Y here if you intend to execute your compressed kernel image
904 (zImage) directly from ROM or flash. If unsure, say N.
907 string "Default kernel command string"
910 On some architectures (EBSA110 and CATS), there is currently no way
911 for the boot loader to pass arguments to the kernel. For these
912 architectures, you should supply some command-line options at build
913 time by entering them here. As a minimum, you should specify the
914 memory size and the root device (e.g., mem=64M root=/dev/nfs).
917 bool "Kernel Execute-In-Place from ROM"
918 depends on !ZBOOT_ROM
920 Execute-In-Place allows the kernel to run from non-volatile storage
921 directly addressable by the CPU, such as NOR flash. This saves RAM
922 space since the text section of the kernel is not loaded from flash
923 to RAM. Read-write sections, such as the data section and stack,
924 are still copied to RAM. The XIP kernel is not compressed since
925 it has to run directly from flash, so it will take more space to
926 store it. The flash address used to link the kernel object files,
927 and for storing it, is configuration dependent. Therefore, if you
928 say Y here, you must know the proper physical address where to
929 store the kernel image depending on your own flash memory usage.
931 Also note that the make target becomes "make xipImage" rather than
932 "make zImage" or "make Image". The final kernel binary to put in
933 ROM memory will be arch/arm/boot/xipImage.
938 hex "XIP Kernel Physical Location"
939 depends on XIP_KERNEL
942 This is the physical address in your flash memory the kernel will
943 be linked for and stored to. This address is dependent on your
947 bool "Kexec system call (EXPERIMENTAL)"
948 depends on EXPERIMENTAL
950 kexec is a system call that implements the ability to shutdown your
951 current kernel, and to start another kernel. It is like a reboot
952 but it is independent of the system firmware. And like a reboot
953 you can start any kernel with it, not just Linux.
955 It is an ongoing process to be certain the hardware in a machine
956 is properly shutdown, so do not be surprised if this code does not
957 initially work for you. It may help to enable device hotplugging
961 bool "Export atags in procfs"
965 Should the atags used to boot the kernel be exported in an "atags"
966 file in procfs. Useful with kexec.
970 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
972 menu "CPU Frequency scaling"
974 source "drivers/cpufreq/Kconfig"
976 config CPU_FREQ_SA1100
978 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
981 config CPU_FREQ_SA1110
983 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
986 config CPU_FREQ_INTEGRATOR
987 tristate "CPUfreq driver for ARM Integrator CPUs"
988 depends on ARCH_INTEGRATOR && CPU_FREQ
991 This enables the CPUfreq driver for ARM Integrator CPUs.
993 For details, take a look at <file:Documentation/cpu-freq>.
998 tristate "CPUfreq driver for i.MX CPUs"
999 depends on ARCH_IMX && CPU_FREQ
1002 This enables the CPUfreq driver for i.MX CPUs.
1008 depends on CPU_FREQ && ARCH_PXA && PXA25x
1010 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1016 menu "Floating point emulation"
1018 comment "At least one emulation must be selected"
1021 bool "NWFPE math emulation"
1022 depends on !AEABI || OABI_COMPAT
1024 Say Y to include the NWFPE floating point emulator in the kernel.
1025 This is necessary to run most binaries. Linux does not currently
1026 support floating point hardware so you need to say Y here even if
1027 your machine has an FPA or floating point co-processor podule.
1029 You may say N here if you are going to load the Acorn FPEmulator
1030 early in the bootup.
1033 bool "Support extended precision"
1034 depends on FPE_NWFPE
1036 Say Y to include 80-bit support in the kernel floating-point
1037 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1038 Note that gcc does not generate 80-bit operations by default,
1039 so in most cases this option only enlarges the size of the
1040 floating point emulator without any good reason.
1042 You almost surely want to say N here.
1045 bool "FastFPE math emulation (EXPERIMENTAL)"
1046 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1048 Say Y here to include the FAST floating point emulator in the kernel.
1049 This is an experimental much faster emulator which now also has full
1050 precision for the mantissa. It does not support any exceptions.
1051 It is very simple, and approximately 3-6 times faster than NWFPE.
1053 It should be sufficient for most programs. It may be not suitable
1054 for scientific calculations, but you have to check this for yourself.
1055 If you do not feel you need a faster FP emulation you should better
1059 bool "VFP-format floating point maths"
1060 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1062 Say Y to include VFP support code in the kernel. This is needed
1063 if your hardware includes a VFP unit.
1065 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1066 release notes and additional status information.
1068 Say N if your target does not have VFP hardware.
1076 bool "Advanced SIMD (NEON) Extension support"
1077 depends on VFPv3 && CPU_V7
1079 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1084 menu "Userspace binary formats"
1086 source "fs/Kconfig.binfmt"
1089 tristate "RISC OS personality"
1092 Say Y here to include the kernel code necessary if you want to run
1093 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1094 experimental; if this sounds frightening, say N and sleep in peace.
1095 You can also say M here to compile this support as a module (which
1096 will be called arthur).
1100 menu "Power management options"
1102 source "kernel/power/Kconfig"
1104 config ARCH_SUSPEND_POSSIBLE
1109 source "net/Kconfig"
1111 menu "Device Drivers"
1113 source "drivers/base/Kconfig"
1115 source "drivers/connector/Kconfig"
1117 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1118 source "drivers/mtd/Kconfig"
1121 source "drivers/parport/Kconfig"
1123 source "drivers/pnp/Kconfig"
1125 source "drivers/block/Kconfig"
1127 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1129 source "drivers/misc/Kconfig"
1131 source "drivers/ide/Kconfig"
1133 source "drivers/scsi/Kconfig"
1135 source "drivers/ata/Kconfig"
1137 source "drivers/md/Kconfig"
1139 source "drivers/message/fusion/Kconfig"
1141 source "drivers/ieee1394/Kconfig"
1143 source "drivers/message/i2o/Kconfig"
1145 source "drivers/net/Kconfig"
1147 source "drivers/isdn/Kconfig"
1149 # input before char - char/joystick depends on it. As does USB.
1151 source "drivers/input/Kconfig"
1153 source "drivers/char/Kconfig"
1155 source "drivers/i2c/Kconfig"
1157 source "drivers/spi/Kconfig"
1159 source "drivers/gpio/Kconfig"
1161 source "drivers/w1/Kconfig"
1163 source "drivers/power/Kconfig"
1165 source "drivers/hwmon/Kconfig"
1167 source "drivers/watchdog/Kconfig"
1169 source "drivers/ssb/Kconfig"
1171 #source "drivers/l3/Kconfig"
1173 source "drivers/mfd/Kconfig"
1175 source "drivers/media/Kconfig"
1177 source "drivers/video/Kconfig"
1179 source "sound/Kconfig"
1181 source "drivers/hid/Kconfig"
1183 source "drivers/usb/Kconfig"
1185 source "drivers/mmc/Kconfig"
1187 source "drivers/leds/Kconfig"
1189 source "drivers/rtc/Kconfig"
1191 source "drivers/dma/Kconfig"
1193 source "drivers/dca/Kconfig"
1195 source "drivers/uio/Kconfig"
1201 source "arch/arm/Kconfig.debug"
1203 source "security/Kconfig"
1205 source "crypto/Kconfig"
1207 source "lib/Kconfig"