2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
6 mainmenu "Linux Kernel Configuration"
13 select SYS_SUPPORTS_APM_EMULATION
15 select HAVE_KPROBES if (!XIP_KERNEL)
16 select HAVE_KRETPROBES if (HAVE_KPROBES)
18 The ARM series is a line of low-power-consumption RISC chip designs
19 licensed by ARM Ltd and targeted at embedded applications and
20 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
21 manufactured, but legacy ARM-based PC hardware remains popular in
22 Europe. There is an ARM Linux project with a web page at
23 <http://www.arm.linux.org.uk/>.
25 config SYS_SUPPORTS_APM_EMULATION
36 config GENERIC_CLOCKEVENTS
40 config GENERIC_CLOCKEVENTS_BROADCAST
42 depends on GENERIC_CLOCKEVENTS
43 default y if SMP && !LOCAL_TIMERS
56 The Extended Industry Standard Architecture (EISA) bus was
57 developed as an open alternative to the IBM MicroChannel bus.
59 The EISA bus provided some of the features of the IBM MicroChannel
60 bus while maintaining backward compatibility with cards made for
61 the older ISA bus. The EISA bus saw limited use between 1988 and
62 1995 when it was made obsolete by the PCI bus.
64 Say Y here if you are building a kernel for an EISA-based machine.
74 MicroChannel Architecture is found in some IBM PS/2 machines and
75 laptops. It is a bus system similar to PCI or ISA. See
76 <file:Documentation/mca.txt> (and especially the web page given
77 there) before attempting to build an MCA bus kernel.
79 config GENERIC_HARDIRQS
83 config STACKTRACE_SUPPORT
87 config HAVE_LATENCYTOP_SUPPORT
92 config LOCKDEP_SUPPORT
96 config TRACE_IRQFLAGS_SUPPORT
100 config HARDIRQS_SW_RESEND
104 config GENERIC_IRQ_PROBE
108 config GENERIC_LOCKBREAK
111 depends on SMP && PREEMPT
113 config RWSEM_GENERIC_SPINLOCK
117 config RWSEM_XCHGADD_ALGORITHM
120 config ARCH_HAS_ILOG2_U32
124 config ARCH_HAS_ILOG2_U64
128 config GENERIC_HWEIGHT
132 config GENERIC_CALIBRATE_DELAY
136 config ARCH_SUPPORTS_AOUT
139 config ARCH_MAY_HAVE_PC_FDC
146 config GENERIC_ISA_DMA
157 config OPROFILE_ARMV6
159 depends on CPU_V6 && !SMP
160 select OPROFILE_ARM11_CORE
162 config OPROFILE_MPCORE
164 depends on CPU_V6 && SMP
165 select OPROFILE_ARM11_CORE
167 config OPROFILE_ARM11_CORE
174 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
175 default DRAM_BASE if REMAP_VECTORS_TO_RAM
178 The base address of exception vectors.
180 source "init/Kconfig"
185 prompt "ARM system type"
186 default ARCH_VERSATILE
189 bool "Agilent AAEC-2000 based"
192 This enables support for systems based on the Agilent AAEC-2000
194 config ARCH_INTEGRATOR
195 bool "ARM Ltd. Integrator family"
199 Support for ARM's Integrator platform.
202 bool "ARM Ltd. RealView family"
206 select GENERIC_CLOCKEVENTS
208 This enables support for ARM Ltd RealView boards.
210 config ARCH_VERSATILE
211 bool "ARM Ltd. Versatile family"
216 select GENERIC_CLOCKEVENTS
218 This enables support for ARM Ltd Versatile board.
224 This enables support for systems based on the Atmel AT91RM9200,
225 AT91SAM9 and AT91CAP9 processors.
228 bool "Cirrus CL-PS7500FE"
233 Support for the Cirrus Logic PS7500FE system-on-a-chip.
236 bool "Cirrus Logic CLPS711x/EP721x-based"
238 Support for Cirrus Logic 711x/721x based boards.
243 select FOOTBRIDGE_ADDIN
245 Support for Intel's EBSA285 companion chip.
252 This is an evaluation board for the StrongARM processor available
253 from Digital. It has limited hardware on-board, including an
254 Ethernet interface, two PCMCIA sockets, two serial ports and a
264 This enables support for the Cirrus EP93xx series of CPUs.
266 config ARCH_FOOTBRIDGE
270 Support for systems based on the DC21285 companion chip
271 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
274 bool "Hilscher NetX based"
277 This enables support for systems based on the Hilscher NetX Soc
280 bool "Hynix HMS720x-based"
283 This enables support for systems based on the Hynix HMS720x
289 select GENERIC_CLOCKEVENTS
291 Support for Motorola's i.MX family of processors (MX1, MXL).
298 select ARCH_SUPPORTS_MSI
300 Support for Intel's IOP13XX (XScale) family of processors.
308 Support for Intel's 80219 and IOP32X (XScale) family of
317 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
340 Support for Intel's IXP4XX (XScale) family of processors.
346 Say Y here if you intend to run this kernel on a LinkUp Systems
347 L7200 Software Development Board which uses an ARM720T processor.
348 Information on this board can be obtained at:
350 <http://www.linkupsys.com/>
352 If you have any questions or comments about the Linux kernel port
353 to this board, send e-mail to <sjhill@cotw.com>.
356 bool "Micrel/Kendin KS8695"
359 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
360 System-on-Chip devices.
363 bool "NetSilicon NS9xxx"
366 select GENERIC_CLOCKEVENTS
368 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
371 <http://www.digi.com/products/microprocessors/index.jsp>
374 bool "Freescale MXC/iMX-based"
377 Support for Freescale MXC/iMX-based family of processors
385 select GENERIC_CLOCKEVENTS
388 Support for the following Marvell Orion 5x series SoCs:
389 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
393 bool "Philips Nexperia PNX4008 Mobile"
395 This enables support for Philips PNX4008 mobile platform.
398 bool "PXA2xx/PXA3xx-based"
404 select GENERIC_CLOCKEVENTS
407 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
414 select ARCH_MAY_HAVE_PC_FDC
418 On the Acorn Risc-PC, Linux can support the internal IDE disk and
419 CD-ROM interface, serial and parallel port, and the floppy drive.
424 select ARCH_DISCONTIGMEM_ENABLE
425 select ARCH_SPARSEMEM_ENABLE
426 select ARCH_SELECT_MEMORY_MODEL
430 select GENERIC_CLOCKEVENTS
434 Support for StrongARM 11x0 based boards.
437 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
440 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
441 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
442 the Samsung SMDK2410 development board (and derivatives).
450 Support for the StrongARM based Digital DNARD machine, also known
451 as "Shark" (<http://www.shark-linux.de/shark.html>).
456 Say Y here for systems based on one of the Sharp LH7A40X
457 System on a Chip processors. These CPUs include an ARM922T
458 core with a wide array of integrated devices for
459 hand-held and low-power applications.
464 select GENERIC_CLOCKEVENTS
467 Support for TI's DaVinci platform.
474 select GENERIC_CLOCKEVENTS
476 Support for TI's OMAP platform (OMAP1 and OMAP2).
479 bool "Qualcomm MSM7X00A"
481 select GENERIC_CLOCKEVENTS
483 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
484 apps processor of the MSM7X00A and depends on a shared memory
485 interface to the ARM9 modem processor which runs the baseband stack
486 and controls some vital subsystems (clock and power control, etc).
487 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
491 source "arch/arm/mach-clps711x/Kconfig"
493 source "arch/arm/mach-ep93xx/Kconfig"
495 source "arch/arm/mach-footbridge/Kconfig"
497 source "arch/arm/mach-integrator/Kconfig"
499 source "arch/arm/mach-iop32x/Kconfig"
501 source "arch/arm/mach-iop33x/Kconfig"
503 source "arch/arm/mach-iop13xx/Kconfig"
505 source "arch/arm/mach-ixp4xx/Kconfig"
507 source "arch/arm/mach-ixp2000/Kconfig"
509 source "arch/arm/mach-ixp23xx/Kconfig"
511 source "arch/arm/mach-pxa/Kconfig"
513 source "arch/arm/mach-sa1100/Kconfig"
515 source "arch/arm/plat-omap/Kconfig"
517 source "arch/arm/mach-omap1/Kconfig"
519 source "arch/arm/mach-omap2/Kconfig"
521 source "arch/arm/mach-orion5x/Kconfig"
523 source "arch/arm/plat-s3c24xx/Kconfig"
524 source "arch/arm/plat-s3c/Kconfig"
527 source "arch/arm/mach-s3c2400/Kconfig"
528 source "arch/arm/mach-s3c2410/Kconfig"
529 source "arch/arm/mach-s3c2412/Kconfig"
530 source "arch/arm/mach-s3c2440/Kconfig"
531 source "arch/arm/mach-s3c2442/Kconfig"
532 source "arch/arm/mach-s3c2443/Kconfig"
535 source "arch/arm/mach-lh7a40x/Kconfig"
537 source "arch/arm/mach-imx/Kconfig"
539 source "arch/arm/mach-h720x/Kconfig"
541 source "arch/arm/mach-versatile/Kconfig"
543 source "arch/arm/mach-aaec2000/Kconfig"
545 source "arch/arm/mach-realview/Kconfig"
547 source "arch/arm/mach-at91/Kconfig"
549 source "arch/arm/plat-mxc/Kconfig"
551 source "arch/arm/mach-netx/Kconfig"
553 source "arch/arm/mach-ns9xxx/Kconfig"
555 source "arch/arm/mach-davinci/Kconfig"
557 source "arch/arm/mach-ks8695/Kconfig"
559 source "arch/arm/mach-msm/Kconfig"
561 # Definitions to make life easier
571 source arch/arm/mm/Kconfig
574 bool "Enable iWMMXt support"
575 depends on CPU_XSCALE || CPU_XSC3
576 default y if PXA27x || PXA3xx
578 Enable support for iWMMXt context switching at run time if
579 running on a CPU that supports it.
581 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
584 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
588 source "arch/arm/Kconfig-nommu"
593 source "arch/arm/common/Kconfig"
595 config FORCE_MAX_ZONEORDER
608 Find out whether you have ISA slots on your motherboard. ISA is the
609 name of a bus system, i.e. the way the CPU talks to the other stuff
610 inside your box. Other bus systems are PCI, EISA, MicroChannel
611 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
612 newer boards don't support it. If you have ISA, say Y, otherwise N.
614 # Select ISA DMA controller support
619 # Select ISA DMA interface
624 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
626 Find out whether you have a PCI motherboard. PCI is the name of a
627 bus system, i.e. the way the CPU talks to the other stuff inside
628 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
629 VESA. If you have PCI, say Y, otherwise N.
634 # Select the host bridge type
635 config PCI_HOST_VIA82C505
637 depends on PCI && ARCH_SHARK
640 config PCI_HOST_ITE8152
642 depends on PCI && MACH_ARMCORE
646 source "drivers/pci/Kconfig"
648 source "drivers/pcmcia/Kconfig"
652 menu "Kernel Features"
654 source "kernel/time/Kconfig"
657 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
658 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
660 This enables support for systems with more than one CPU. If you have
661 a system with only one CPU, like most personal computers, say N. If
662 you have a system with more than one CPU, say Y.
664 If you say N here, the kernel will run on single and multiprocessor
665 machines, but will use only one CPU of a multiprocessor machine. If
666 you say Y here, the kernel will run on many, but not all, single
667 processor machines. On a single processor machine, the kernel will
668 run faster if you say N here.
670 See also <file:Documentation/i386/IO-APIC.txt>,
671 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
672 <http://www.linuxdoc.org/docs.html#howto>.
674 If you don't know what to do here, say N.
677 int "Maximum number of CPUs (2-32)"
683 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
684 depends on SMP && HOTPLUG && EXPERIMENTAL
686 Say Y here to experiment with turning CPUs off and on. CPUs
687 can be controlled through /sys/devices/system/cpu.
690 bool "Use local timer interrupts"
691 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
694 Enable support for local timers on SMP platforms, rather then the
695 legacy IPI broadcast method. Local timers allows the system
696 accounting to be spread across the timer interval, preventing a
697 "thundering herd" at every timer tick.
700 bool "Preemptible Kernel (EXPERIMENTAL)"
701 depends on EXPERIMENTAL
703 This option reduces the latency of the kernel when reacting to
704 real-time or interactive events by allowing a low priority process to
705 be preempted even if it is in kernel mode executing a system call.
706 This allows applications to run more reliably even when the system is
709 Say Y here if you are building a kernel for a desktop, embedded
710 or real-time system. Say N if you are unsure.
713 bool "Dynamic tick timer"
714 depends on !GENERIC_CLOCKEVENTS
716 Select this option if you want to disable continuous timer ticks
717 and have them programmed to occur as required. This option saves
718 power as the system can remain in idle state for longer.
720 By default dynamic tick is disabled during the boot, and can be
721 manually enabled with:
723 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
725 Alternatively, if you want dynamic tick automatically enabled
726 during boot, pass "dyntick=enable" via the kernel command string.
728 Please note that dynamic tick may affect the accuracy of
729 timekeeping on some platforms depending on the implementation.
730 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
731 to have accurate timekeeping with dynamic tick.
735 default 128 if ARCH_L7200
736 default 200 if ARCH_EBSA110 || ARCH_S3C2410
737 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
738 default AT91_TIMER_HZ if ARCH_AT91
742 bool "Use the ARM EABI to compile the kernel"
744 This option allows for the kernel to be compiled using the latest
745 ARM ABI (aka EABI). This is only useful if you are using a user
746 space environment that is also compiled with EABI.
748 Since there are major incompatibilities between the legacy ABI and
749 EABI, especially with regard to structure member alignment, this
750 option also changes the kernel syscall calling convention to
751 disambiguate both ABIs and allow for backward compatibility support
752 (selected with CONFIG_OABI_COMPAT).
754 To use this you need GCC version 4.0.0 or later.
757 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
758 depends on AEABI && EXPERIMENTAL
761 This option preserves the old syscall interface along with the
762 new (ARM EABI) one. It also provides a compatibility layer to
763 intercept syscalls that have structure arguments which layout
764 in memory differs between the legacy ABI and the new ARM EABI
765 (only for non "thumb" binaries). This option adds a tiny
766 overhead to all syscalls and produces a slightly larger kernel.
767 If you know you'll be using only pure EABI user space then you
768 can say N here. If this option is not selected and you attempt
769 to execute a legacy ABI binary then the result will be
770 UNPREDICTABLE (in fact it can be predicted that it won't work
771 at all). If in doubt say Y.
773 config ARCH_DISCONTIGMEM_ENABLE
775 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
777 Say Y to support efficient handling of discontiguous physical memory,
778 for architectures which are either NUMA (Non-Uniform Memory Access)
779 or have huge holes in the physical address space for other reasons.
780 See <file:Documentation/vm/numa> for more.
782 config ARCH_SPARSEMEM_ENABLE
785 config ARCH_SELECT_MEMORY_MODEL
790 default "4" if ARCH_LH7A40X
792 depends on NEED_MULTIPLE_NODES
797 bool "Timer and CPU usage LEDs"
798 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
799 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
800 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
801 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
802 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
803 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
804 ARCH_KS8695 || MACH_RD88F5182
806 If you say Y here, the LEDs on your machine will be used
807 to provide useful information about your current system status.
809 If you are compiling a kernel for a NetWinder or EBSA-285, you will
810 be able to select which LEDs are active using the options below. If
811 you are compiling a kernel for the EBSA-110 or the LART however, the
812 red LED will simply flash regularly to indicate that the system is
813 still functional. It is safe to say Y here if you have a CATS
814 system, but the driver will do nothing.
817 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
818 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
819 || MACH_OMAP_PERSEUS2
821 depends on !GENERIC_CLOCKEVENTS
822 default y if ARCH_EBSA110
824 If you say Y here, one of the system LEDs (the green one on the
825 NetWinder, the amber one on the EBSA285, or the red one on the LART)
826 will flash regularly to indicate that the system is still
827 operational. This is mainly useful to kernel hackers who are
828 debugging unstable kernels.
830 The LART uses the same LED for both Timer LED and CPU usage LED
831 functions. You may choose to use both, but the Timer LED function
832 will overrule the CPU usage LED.
835 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
837 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
838 || MACH_OMAP_PERSEUS2
841 If you say Y here, the red LED will be used to give a good real
842 time indication of CPU usage, by lighting whenever the idle task
843 is not currently executing.
845 The LART uses the same LED for both Timer LED and CPU usage LED
846 functions. You may choose to use both, but the Timer LED function
847 will overrule the CPU usage LED.
849 config ALIGNMENT_TRAP
851 depends on CPU_CP15_MMU
852 default y if !ARCH_EBSA110
854 ARM processors cannot fetch/store information which is not
855 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
856 address divisible by 4. On 32-bit ARM processors, these non-aligned
857 fetch/store instructions will be emulated in software if you say
858 here, which has a severe performance impact. This is necessary for
859 correct operation of some network protocols. With an IP-only
860 configuration it is safe to say N, otherwise say Y.
866 # Compressed boot loader in ROM. Yes, we really want to ask about
867 # TEXT and BSS so we preserve their values in the config files.
868 config ZBOOT_ROM_TEXT
869 hex "Compressed ROM boot loader base address"
872 The physical address at which the ROM-able zImage is to be
873 placed in the target. Platforms which normally make use of
874 ROM-able zImage formats normally set this to a suitable
875 value in their defconfig file.
877 If ZBOOT_ROM is not enabled, this has no effect.
880 hex "Compressed ROM boot loader BSS address"
883 The base address of an area of read/write memory in the target
884 for the ROM-able zImage which must be available while the
885 decompressor is running. It must be large enough to hold the
886 entire decompressed kernel plus an additional 128 KiB.
887 Platforms which normally make use of ROM-able zImage formats
888 normally set this to a suitable value in their defconfig file.
890 If ZBOOT_ROM is not enabled, this has no effect.
893 bool "Compressed boot loader in ROM/flash"
894 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
896 Say Y here if you intend to execute your compressed kernel image
897 (zImage) directly from ROM or flash. If unsure, say N.
900 string "Default kernel command string"
903 On some architectures (EBSA110 and CATS), there is currently no way
904 for the boot loader to pass arguments to the kernel. For these
905 architectures, you should supply some command-line options at build
906 time by entering them here. As a minimum, you should specify the
907 memory size and the root device (e.g., mem=64M root=/dev/nfs).
910 bool "Kernel Execute-In-Place from ROM"
911 depends on !ZBOOT_ROM
913 Execute-In-Place allows the kernel to run from non-volatile storage
914 directly addressable by the CPU, such as NOR flash. This saves RAM
915 space since the text section of the kernel is not loaded from flash
916 to RAM. Read-write sections, such as the data section and stack,
917 are still copied to RAM. The XIP kernel is not compressed since
918 it has to run directly from flash, so it will take more space to
919 store it. The flash address used to link the kernel object files,
920 and for storing it, is configuration dependent. Therefore, if you
921 say Y here, you must know the proper physical address where to
922 store the kernel image depending on your own flash memory usage.
924 Also note that the make target becomes "make xipImage" rather than
925 "make zImage" or "make Image". The final kernel binary to put in
926 ROM memory will be arch/arm/boot/xipImage.
931 hex "XIP Kernel Physical Location"
932 depends on XIP_KERNEL
935 This is the physical address in your flash memory the kernel will
936 be linked for and stored to. This address is dependent on your
940 bool "Kexec system call (EXPERIMENTAL)"
941 depends on EXPERIMENTAL
943 kexec is a system call that implements the ability to shutdown your
944 current kernel, and to start another kernel. It is like a reboot
945 but it is independent of the system firmware. And like a reboot
946 you can start any kernel with it, not just Linux.
948 It is an ongoing process to be certain the hardware in a machine
949 is properly shutdown, so do not be surprised if this code does not
950 initially work for you. It may help to enable device hotplugging
954 bool "Export atags in procfs"
958 Should the atags used to boot the kernel be exported in an "atags"
959 file in procfs. Useful with kexec.
963 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
965 menu "CPU Frequency scaling"
967 source "drivers/cpufreq/Kconfig"
969 config CPU_FREQ_SA1100
971 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
974 config CPU_FREQ_SA1110
976 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
979 config CPU_FREQ_INTEGRATOR
980 tristate "CPUfreq driver for ARM Integrator CPUs"
981 depends on ARCH_INTEGRATOR && CPU_FREQ
984 This enables the CPUfreq driver for ARM Integrator CPUs.
986 For details, take a look at <file:Documentation/cpu-freq>.
991 tristate "CPUfreq driver for i.MX CPUs"
992 depends on ARCH_IMX && CPU_FREQ
995 This enables the CPUfreq driver for i.MX CPUs.
1001 depends on CPU_FREQ && ARCH_PXA && PXA25x
1003 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1009 menu "Floating point emulation"
1011 comment "At least one emulation must be selected"
1014 bool "NWFPE math emulation"
1015 depends on !AEABI || OABI_COMPAT
1017 Say Y to include the NWFPE floating point emulator in the kernel.
1018 This is necessary to run most binaries. Linux does not currently
1019 support floating point hardware so you need to say Y here even if
1020 your machine has an FPA or floating point co-processor podule.
1022 You may say N here if you are going to load the Acorn FPEmulator
1023 early in the bootup.
1026 bool "Support extended precision"
1027 depends on FPE_NWFPE
1029 Say Y to include 80-bit support in the kernel floating-point
1030 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1031 Note that gcc does not generate 80-bit operations by default,
1032 so in most cases this option only enlarges the size of the
1033 floating point emulator without any good reason.
1035 You almost surely want to say N here.
1038 bool "FastFPE math emulation (EXPERIMENTAL)"
1039 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1041 Say Y here to include the FAST floating point emulator in the kernel.
1042 This is an experimental much faster emulator which now also has full
1043 precision for the mantissa. It does not support any exceptions.
1044 It is very simple, and approximately 3-6 times faster than NWFPE.
1046 It should be sufficient for most programs. It may be not suitable
1047 for scientific calculations, but you have to check this for yourself.
1048 If you do not feel you need a faster FP emulation you should better
1052 bool "VFP-format floating point maths"
1053 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1055 Say Y to include VFP support code in the kernel. This is needed
1056 if your hardware includes a VFP unit.
1058 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1059 release notes and additional status information.
1061 Say N if your target does not have VFP hardware.
1069 bool "Advanced SIMD (NEON) Extension support"
1070 depends on VFPv3 && CPU_V7
1072 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1077 menu "Userspace binary formats"
1079 source "fs/Kconfig.binfmt"
1082 tristate "RISC OS personality"
1085 Say Y here to include the kernel code necessary if you want to run
1086 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1087 experimental; if this sounds frightening, say N and sleep in peace.
1088 You can also say M here to compile this support as a module (which
1089 will be called arthur).
1093 menu "Power management options"
1095 source "kernel/power/Kconfig"
1097 config ARCH_SUSPEND_POSSIBLE
1102 source "net/Kconfig"
1104 menu "Device Drivers"
1106 source "drivers/base/Kconfig"
1108 source "drivers/connector/Kconfig"
1110 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1111 source "drivers/mtd/Kconfig"
1114 source "drivers/parport/Kconfig"
1116 source "drivers/pnp/Kconfig"
1118 source "drivers/block/Kconfig"
1120 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1122 source "drivers/misc/Kconfig"
1124 source "drivers/ide/Kconfig"
1126 source "drivers/scsi/Kconfig"
1128 source "drivers/ata/Kconfig"
1130 source "drivers/md/Kconfig"
1132 source "drivers/message/fusion/Kconfig"
1134 source "drivers/ieee1394/Kconfig"
1136 source "drivers/message/i2o/Kconfig"
1138 source "drivers/net/Kconfig"
1140 source "drivers/isdn/Kconfig"
1142 # input before char - char/joystick depends on it. As does USB.
1144 source "drivers/input/Kconfig"
1146 source "drivers/char/Kconfig"
1148 source "drivers/i2c/Kconfig"
1150 source "drivers/spi/Kconfig"
1152 source "drivers/gpio/Kconfig"
1154 source "drivers/w1/Kconfig"
1156 source "drivers/power/Kconfig"
1158 source "drivers/hwmon/Kconfig"
1160 source "drivers/watchdog/Kconfig"
1162 source "drivers/ssb/Kconfig"
1164 #source "drivers/l3/Kconfig"
1166 source "drivers/mfd/Kconfig"
1168 source "drivers/media/Kconfig"
1170 source "drivers/video/Kconfig"
1172 source "sound/Kconfig"
1174 source "drivers/hid/Kconfig"
1176 source "drivers/usb/Kconfig"
1178 source "drivers/mmc/Kconfig"
1180 source "drivers/leds/Kconfig"
1182 source "drivers/rtc/Kconfig"
1184 source "drivers/dma/Kconfig"
1186 source "drivers/dca/Kconfig"
1188 source "drivers/uio/Kconfig"
1194 source "arch/arm/Kconfig.debug"
1196 source "security/Kconfig"
1198 source "crypto/Kconfig"
1200 source "lib/Kconfig"