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)
17 select HAVE_FTRACE if (!XIP_KERNEL)
18 select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
20 The ARM series is a line of low-power-consumption RISC chip designs
21 licensed by ARM Ltd and targeted at embedded applications and
22 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
23 manufactured, but legacy ARM-based PC hardware remains popular in
24 Europe. There is an ARM Linux project with a web page at
25 <http://www.arm.linux.org.uk/>.
27 config SYS_SUPPORTS_APM_EMULATION
38 config GENERIC_CLOCKEVENTS
42 config GENERIC_CLOCKEVENTS_BROADCAST
44 depends on GENERIC_CLOCKEVENTS
45 default y if SMP && !LOCAL_TIMERS
58 The Extended Industry Standard Architecture (EISA) bus was
59 developed as an open alternative to the IBM MicroChannel bus.
61 The EISA bus provided some of the features of the IBM MicroChannel
62 bus while maintaining backward compatibility with cards made for
63 the older ISA bus. The EISA bus saw limited use between 1988 and
64 1995 when it was made obsolete by the PCI bus.
66 Say Y here if you are building a kernel for an EISA-based machine.
76 MicroChannel Architecture is found in some IBM PS/2 machines and
77 laptops. It is a bus system similar to PCI or ISA. See
78 <file:Documentation/mca.txt> (and especially the web page given
79 there) before attempting to build an MCA bus kernel.
81 config GENERIC_HARDIRQS
85 config STACKTRACE_SUPPORT
89 config LOCKDEP_SUPPORT
93 config TRACE_IRQFLAGS_SUPPORT
97 config HARDIRQS_SW_RESEND
101 config GENERIC_IRQ_PROBE
105 config GENERIC_LOCKBREAK
108 depends on SMP && PREEMPT
110 config RWSEM_GENERIC_SPINLOCK
114 config RWSEM_XCHGADD_ALGORITHM
117 config ARCH_HAS_ILOG2_U32
121 config ARCH_HAS_ILOG2_U64
125 config GENERIC_HWEIGHT
129 config GENERIC_CALIBRATE_DELAY
133 config ARCH_SUPPORTS_AOUT
136 config ARCH_MAY_HAVE_PC_FDC
143 config GENERIC_ISA_DMA
154 config OPROFILE_ARMV6
156 depends on CPU_V6 && !SMP
157 select OPROFILE_ARM11_CORE
159 config OPROFILE_MPCORE
161 depends on CPU_V6 && SMP
162 select OPROFILE_ARM11_CORE
164 config OPROFILE_ARM11_CORE
171 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
172 default DRAM_BASE if REMAP_VECTORS_TO_RAM
175 The base address of exception vectors.
177 source "init/Kconfig"
182 prompt "ARM system type"
183 default ARCH_VERSATILE
186 bool "Agilent AAEC-2000 based"
189 This enables support for systems based on the Agilent AAEC-2000
191 config ARCH_INTEGRATOR
192 bool "ARM Ltd. Integrator family"
196 Support for ARM's Integrator platform.
199 bool "ARM Ltd. RealView family"
203 select GENERIC_CLOCKEVENTS
205 This enables support for ARM Ltd RealView boards.
207 config ARCH_VERSATILE
208 bool "ARM Ltd. Versatile family"
213 select GENERIC_CLOCKEVENTS
215 This enables support for ARM Ltd Versatile board.
221 This enables support for systems based on the Atmel AT91RM9200,
222 AT91SAM9 and AT91CAP9 processors.
225 bool "Cirrus CL-PS7500FE"
230 Support for the Cirrus Logic PS7500FE system-on-a-chip.
233 bool "Cirrus Logic CLPS711x/EP721x-based"
235 Support for Cirrus Logic 711x/721x based boards.
240 select FOOTBRIDGE_ADDIN
242 Support for Intel's EBSA285 companion chip.
249 This is an evaluation board for the StrongARM processor available
250 from Digital. It has limited hardware on-board, including an
251 Ethernet interface, two PCMCIA sockets, two serial ports and a
261 This enables support for the Cirrus EP93xx series of CPUs.
263 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.
305 Support for Intel's 80219 and IOP32X (XScale) family of
314 Support for Intel's IOP33X (XScale) family of processors.
321 Support for Intel's IXP23xx (XScale) family of processors.
324 bool "IXP2400/2800-based"
328 Support for Intel's IXP2400/2800 (XScale) family of processors.
335 select GENERIC_CLOCKEVENTS
337 Support for Intel's IXP4XX (XScale) family of processors.
343 Say Y here if you intend to run this kernel on a LinkUp Systems
344 L7200 Software Development Board which uses an ARM720T processor.
345 Information on this board can be obtained at:
347 <http://www.linkupsys.com/>
349 If you have any questions or comments about the Linux kernel port
350 to this board, send e-mail to <sjhill@cotw.com>.
353 bool "Micrel/Kendin KS8695"
356 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
357 System-on-Chip devices.
360 bool "NetSilicon NS9xxx"
363 select GENERIC_CLOCKEVENTS
365 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
368 <http://www.digi.com/products/microprocessors/index.jsp>
371 bool "Freescale MXC/iMX-based"
374 Support for Freescale MXC/iMX-based family of processors
382 select GENERIC_CLOCKEVENTS
385 Support for the following Marvell Orion 5x series SoCs:
386 Orion-1 (5181), Orion-NAS (5182), Orion-2 (5281.)
389 bool "Philips Nexperia PNX4008 Mobile"
391 This enables support for Philips PNX4008 mobile platform.
394 bool "PXA2xx/PXA3xx-based"
400 select GENERIC_CLOCKEVENTS
403 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
410 select ARCH_MAY_HAVE_PC_FDC
414 On the Acorn Risc-PC, Linux can support the internal IDE disk and
415 CD-ROM interface, serial and parallel port, and the floppy drive.
420 select ARCH_DISCONTIGMEM_ENABLE
421 select ARCH_SPARSEMEM_ENABLE
422 select ARCH_SELECT_MEMORY_MODEL
426 select GENERIC_CLOCKEVENTS
430 Support for StrongARM 11x0 based boards.
433 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
436 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
437 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
438 the Samsung SMDK2410 development board (and derivatives).
446 Support for the StrongARM based Digital DNARD machine, also known
447 as "Shark" (<http://www.shark-linux.de/shark.html>).
452 Say Y here for systems based on one of the Sharp LH7A40X
453 System on a Chip processors. These CPUs include an ARM922T
454 core with a wide array of integrated devices for
455 hand-held and low-power applications.
460 select GENERIC_CLOCKEVENTS
463 Support for TI's DaVinci platform.
470 select GENERIC_CLOCKEVENTS
472 Support for TI's OMAP platform (OMAP1 and OMAP2).
475 bool "Qualcomm MSM7X00A"
477 select GENERIC_CLOCKEVENTS
479 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
480 apps processor of the MSM7X00A and depends on a shared memory
481 interface to the ARM9 modem processor which runs the baseband stack
482 and controls some vital subsystems (clock and power control, etc).
483 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
487 source "arch/arm/mach-clps711x/Kconfig"
489 source "arch/arm/mach-ep93xx/Kconfig"
491 source "arch/arm/mach-footbridge/Kconfig"
493 source "arch/arm/mach-integrator/Kconfig"
495 source "arch/arm/mach-iop32x/Kconfig"
497 source "arch/arm/mach-iop33x/Kconfig"
499 source "arch/arm/mach-iop13xx/Kconfig"
501 source "arch/arm/mach-ixp4xx/Kconfig"
503 source "arch/arm/mach-ixp2000/Kconfig"
505 source "arch/arm/mach-ixp23xx/Kconfig"
507 source "arch/arm/mach-pxa/Kconfig"
509 source "arch/arm/mach-sa1100/Kconfig"
511 source "arch/arm/plat-omap/Kconfig"
513 source "arch/arm/mach-omap1/Kconfig"
515 source "arch/arm/mach-omap2/Kconfig"
517 source "arch/arm/mach-orion5x/Kconfig"
519 source "arch/arm/plat-s3c24xx/Kconfig"
520 source "arch/arm/plat-s3c/Kconfig"
523 source "arch/arm/mach-s3c2400/Kconfig"
524 source "arch/arm/mach-s3c2410/Kconfig"
525 source "arch/arm/mach-s3c2412/Kconfig"
526 source "arch/arm/mach-s3c2440/Kconfig"
527 source "arch/arm/mach-s3c2442/Kconfig"
528 source "arch/arm/mach-s3c2443/Kconfig"
531 source "arch/arm/mach-lh7a40x/Kconfig"
533 source "arch/arm/mach-imx/Kconfig"
535 source "arch/arm/mach-h720x/Kconfig"
537 source "arch/arm/mach-versatile/Kconfig"
539 source "arch/arm/mach-aaec2000/Kconfig"
541 source "arch/arm/mach-realview/Kconfig"
543 source "arch/arm/mach-at91/Kconfig"
545 source "arch/arm/plat-mxc/Kconfig"
547 source "arch/arm/mach-netx/Kconfig"
549 source "arch/arm/mach-ns9xxx/Kconfig"
551 source "arch/arm/mach-davinci/Kconfig"
553 source "arch/arm/mach-ks8695/Kconfig"
555 source "arch/arm/mach-msm/Kconfig"
557 # Definitions to make life easier
567 source arch/arm/mm/Kconfig
570 bool "Enable iWMMXt support"
571 depends on CPU_XSCALE || CPU_XSC3
572 default y if PXA27x || PXA3xx
574 Enable support for iWMMXt context switching at run time if
575 running on a CPU that supports it.
577 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
580 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
584 source "arch/arm/Kconfig-nommu"
589 source "arch/arm/common/Kconfig"
591 config FORCE_MAX_ZONEORDER
604 Find out whether you have ISA slots on your motherboard. ISA is the
605 name of a bus system, i.e. the way the CPU talks to the other stuff
606 inside your box. Other bus systems are PCI, EISA, MicroChannel
607 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
608 newer boards don't support it. If you have ISA, say Y, otherwise N.
610 # Select ISA DMA controller support
615 # Select ISA DMA interface
620 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
622 Find out whether you have a PCI motherboard. PCI is the name of a
623 bus system, i.e. the way the CPU talks to the other stuff inside
624 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
625 VESA. If you have PCI, say Y, otherwise N.
630 # Select the host bridge type
631 config PCI_HOST_VIA82C505
633 depends on PCI && ARCH_SHARK
636 config PCI_HOST_ITE8152
638 depends on PCI && MACH_ARMCORE
642 source "drivers/pci/Kconfig"
644 source "drivers/pcmcia/Kconfig"
648 menu "Kernel Features"
650 source "kernel/time/Kconfig"
653 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
654 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
656 This enables support for systems with more than one CPU. If you have
657 a system with only one CPU, like most personal computers, say N. If
658 you have a system with more than one CPU, say Y.
660 If you say N here, the kernel will run on single and multiprocessor
661 machines, but will use only one CPU of a multiprocessor machine. If
662 you say Y here, the kernel will run on many, but not all, single
663 processor machines. On a single processor machine, the kernel will
664 run faster if you say N here.
666 See also <file:Documentation/i386/IO-APIC.txt>,
667 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
668 <http://www.linuxdoc.org/docs.html#howto>.
670 If you don't know what to do here, say N.
673 int "Maximum number of CPUs (2-32)"
679 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
680 depends on SMP && HOTPLUG && EXPERIMENTAL
682 Say Y here to experiment with turning CPUs off and on. CPUs
683 can be controlled through /sys/devices/system/cpu.
686 bool "Use local timer interrupts"
687 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
690 Enable support for local timers on SMP platforms, rather then the
691 legacy IPI broadcast method. Local timers allows the system
692 accounting to be spread across the timer interval, preventing a
693 "thundering herd" at every timer tick.
696 bool "Preemptible Kernel (EXPERIMENTAL)"
697 depends on EXPERIMENTAL
699 This option reduces the latency of the kernel when reacting to
700 real-time or interactive events by allowing a low priority process to
701 be preempted even if it is in kernel mode executing a system call.
702 This allows applications to run more reliably even when the system is
705 Say Y here if you are building a kernel for a desktop, embedded
706 or real-time system. Say N if you are unsure.
709 bool "Dynamic tick timer"
710 depends on !GENERIC_CLOCKEVENTS
712 Select this option if you want to disable continuous timer ticks
713 and have them programmed to occur as required. This option saves
714 power as the system can remain in idle state for longer.
716 By default dynamic tick is disabled during the boot, and can be
717 manually enabled with:
719 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
721 Alternatively, if you want dynamic tick automatically enabled
722 during boot, pass "dyntick=enable" via the kernel command string.
724 Please note that dynamic tick may affect the accuracy of
725 timekeeping on some platforms depending on the implementation.
726 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
727 to have accurate timekeeping with dynamic tick.
731 default 128 if ARCH_L7200
732 default 200 if ARCH_EBSA110 || ARCH_S3C2410
733 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
734 default AT91_TIMER_HZ if ARCH_AT91
738 bool "Use the ARM EABI to compile the kernel"
740 This option allows for the kernel to be compiled using the latest
741 ARM ABI (aka EABI). This is only useful if you are using a user
742 space environment that is also compiled with EABI.
744 Since there are major incompatibilities between the legacy ABI and
745 EABI, especially with regard to structure member alignment, this
746 option also changes the kernel syscall calling convention to
747 disambiguate both ABIs and allow for backward compatibility support
748 (selected with CONFIG_OABI_COMPAT).
750 To use this you need GCC version 4.0.0 or later.
753 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
754 depends on AEABI && EXPERIMENTAL
757 This option preserves the old syscall interface along with the
758 new (ARM EABI) one. It also provides a compatibility layer to
759 intercept syscalls that have structure arguments which layout
760 in memory differs between the legacy ABI and the new ARM EABI
761 (only for non "thumb" binaries). This option adds a tiny
762 overhead to all syscalls and produces a slightly larger kernel.
763 If you know you'll be using only pure EABI user space then you
764 can say N here. If this option is not selected and you attempt
765 to execute a legacy ABI binary then the result will be
766 UNPREDICTABLE (in fact it can be predicted that it won't work
767 at all). If in doubt say Y.
769 config ARCH_DISCONTIGMEM_ENABLE
771 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
773 Say Y to support efficient handling of discontiguous physical memory,
774 for architectures which are either NUMA (Non-Uniform Memory Access)
775 or have huge holes in the physical address space for other reasons.
776 See <file:Documentation/vm/numa> for more.
778 config ARCH_SPARSEMEM_ENABLE
781 config ARCH_SELECT_MEMORY_MODEL
786 default "4" if ARCH_LH7A40X
788 depends on NEED_MULTIPLE_NODES
793 bool "Timer and CPU usage LEDs"
794 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
795 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
796 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
797 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
798 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
799 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
800 ARCH_KS8695 || MACH_RD88F5182
802 If you say Y here, the LEDs on your machine will be used
803 to provide useful information about your current system status.
805 If you are compiling a kernel for a NetWinder or EBSA-285, you will
806 be able to select which LEDs are active using the options below. If
807 you are compiling a kernel for the EBSA-110 or the LART however, the
808 red LED will simply flash regularly to indicate that the system is
809 still functional. It is safe to say Y here if you have a CATS
810 system, but the driver will do nothing.
813 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
814 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
815 || MACH_OMAP_PERSEUS2
817 depends on !GENERIC_CLOCKEVENTS
818 default y if ARCH_EBSA110
820 If you say Y here, one of the system LEDs (the green one on the
821 NetWinder, the amber one on the EBSA285, or the red one on the LART)
822 will flash regularly to indicate that the system is still
823 operational. This is mainly useful to kernel hackers who are
824 debugging unstable kernels.
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.
831 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
833 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
834 || MACH_OMAP_PERSEUS2
837 If you say Y here, the red LED will be used to give a good real
838 time indication of CPU usage, by lighting whenever the idle task
839 is not currently executing.
841 The LART uses the same LED for both Timer LED and CPU usage LED
842 functions. You may choose to use both, but the Timer LED function
843 will overrule the CPU usage LED.
845 config ALIGNMENT_TRAP
847 depends on CPU_CP15_MMU
848 default y if !ARCH_EBSA110
850 ARM processors cannot fetch/store information which is not
851 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
852 address divisible by 4. On 32-bit ARM processors, these non-aligned
853 fetch/store instructions will be emulated in software if you say
854 here, which has a severe performance impact. This is necessary for
855 correct operation of some network protocols. With an IP-only
856 configuration it is safe to say N, otherwise say Y.
862 # Compressed boot loader in ROM. Yes, we really want to ask about
863 # TEXT and BSS so we preserve their values in the config files.
864 config ZBOOT_ROM_TEXT
865 hex "Compressed ROM boot loader base address"
868 The physical address at which the ROM-able zImage is to be
869 placed in the target. Platforms which normally make use of
870 ROM-able zImage formats normally set this to a suitable
871 value in their defconfig file.
873 If ZBOOT_ROM is not enabled, this has no effect.
876 hex "Compressed ROM boot loader BSS address"
879 The base address of an area of read/write memory in the target
880 for the ROM-able zImage which must be available while the
881 decompressor is running. It must be large enough to hold the
882 entire decompressed kernel plus an additional 128 KiB.
883 Platforms which normally make use of ROM-able zImage formats
884 normally set this to a suitable value in their defconfig file.
886 If ZBOOT_ROM is not enabled, this has no effect.
889 bool "Compressed boot loader in ROM/flash"
890 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
892 Say Y here if you intend to execute your compressed kernel image
893 (zImage) directly from ROM or flash. If unsure, say N.
896 string "Default kernel command string"
899 On some architectures (EBSA110 and CATS), there is currently no way
900 for the boot loader to pass arguments to the kernel. For these
901 architectures, you should supply some command-line options at build
902 time by entering them here. As a minimum, you should specify the
903 memory size and the root device (e.g., mem=64M root=/dev/nfs).
906 bool "Kernel Execute-In-Place from ROM"
907 depends on !ZBOOT_ROM
909 Execute-In-Place allows the kernel to run from non-volatile storage
910 directly addressable by the CPU, such as NOR flash. This saves RAM
911 space since the text section of the kernel is not loaded from flash
912 to RAM. Read-write sections, such as the data section and stack,
913 are still copied to RAM. The XIP kernel is not compressed since
914 it has to run directly from flash, so it will take more space to
915 store it. The flash address used to link the kernel object files,
916 and for storing it, is configuration dependent. Therefore, if you
917 say Y here, you must know the proper physical address where to
918 store the kernel image depending on your own flash memory usage.
920 Also note that the make target becomes "make xipImage" rather than
921 "make zImage" or "make Image". The final kernel binary to put in
922 ROM memory will be arch/arm/boot/xipImage.
927 hex "XIP Kernel Physical Location"
928 depends on XIP_KERNEL
931 This is the physical address in your flash memory the kernel will
932 be linked for and stored to. This address is dependent on your
936 bool "Kexec system call (EXPERIMENTAL)"
937 depends on EXPERIMENTAL
939 kexec is a system call that implements the ability to shutdown your
940 current kernel, and to start another kernel. It is like a reboot
941 but it is independent of the system firmware. And like a reboot
942 you can start any kernel with it, not just Linux.
944 It is an ongoing process to be certain the hardware in a machine
945 is properly shutdown, so do not be surprised if this code does not
946 initially work for you. It may help to enable device hotplugging
950 bool "Export atags in procfs"
954 Should the atags used to boot the kernel be exported in an "atags"
955 file in procfs. Useful with kexec.
959 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
961 menu "CPU Frequency scaling"
963 source "drivers/cpufreq/Kconfig"
965 config CPU_FREQ_SA1100
967 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
970 config CPU_FREQ_SA1110
972 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
975 config CPU_FREQ_INTEGRATOR
976 tristate "CPUfreq driver for ARM Integrator CPUs"
977 depends on ARCH_INTEGRATOR && CPU_FREQ
980 This enables the CPUfreq driver for ARM Integrator CPUs.
982 For details, take a look at <file:Documentation/cpu-freq>.
987 tristate "CPUfreq driver for i.MX CPUs"
988 depends on ARCH_IMX && CPU_FREQ
991 This enables the CPUfreq driver for i.MX CPUs.
997 depends on CPU_FREQ && ARCH_PXA && PXA25x
999 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1005 menu "Floating point emulation"
1007 comment "At least one emulation must be selected"
1010 bool "NWFPE math emulation"
1011 depends on !AEABI || OABI_COMPAT
1013 Say Y to include the NWFPE floating point emulator in the kernel.
1014 This is necessary to run most binaries. Linux does not currently
1015 support floating point hardware so you need to say Y here even if
1016 your machine has an FPA or floating point co-processor podule.
1018 You may say N here if you are going to load the Acorn FPEmulator
1019 early in the bootup.
1022 bool "Support extended precision"
1023 depends on FPE_NWFPE
1025 Say Y to include 80-bit support in the kernel floating-point
1026 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1027 Note that gcc does not generate 80-bit operations by default,
1028 so in most cases this option only enlarges the size of the
1029 floating point emulator without any good reason.
1031 You almost surely want to say N here.
1034 bool "FastFPE math emulation (EXPERIMENTAL)"
1035 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1037 Say Y here to include the FAST floating point emulator in the kernel.
1038 This is an experimental much faster emulator which now also has full
1039 precision for the mantissa. It does not support any exceptions.
1040 It is very simple, and approximately 3-6 times faster than NWFPE.
1042 It should be sufficient for most programs. It may be not suitable
1043 for scientific calculations, but you have to check this for yourself.
1044 If you do not feel you need a faster FP emulation you should better
1048 bool "VFP-format floating point maths"
1049 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1051 Say Y to include VFP support code in the kernel. This is needed
1052 if your hardware includes a VFP unit.
1054 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1055 release notes and additional status information.
1057 Say N if your target does not have VFP hardware.
1065 bool "Advanced SIMD (NEON) Extension support"
1066 depends on VFPv3 && CPU_V7
1068 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1073 menu "Userspace binary formats"
1075 source "fs/Kconfig.binfmt"
1078 tristate "RISC OS personality"
1081 Say Y here to include the kernel code necessary if you want to run
1082 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1083 experimental; if this sounds frightening, say N and sleep in peace.
1084 You can also say M here to compile this support as a module (which
1085 will be called arthur).
1089 menu "Power management options"
1091 source "kernel/power/Kconfig"
1093 config ARCH_SUSPEND_POSSIBLE
1098 source "net/Kconfig"
1100 menu "Device Drivers"
1102 source "drivers/base/Kconfig"
1104 source "drivers/connector/Kconfig"
1106 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1107 source "drivers/mtd/Kconfig"
1110 source "drivers/parport/Kconfig"
1112 source "drivers/pnp/Kconfig"
1114 source "drivers/block/Kconfig"
1116 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1118 source "drivers/misc/Kconfig"
1120 source "drivers/ide/Kconfig"
1122 source "drivers/scsi/Kconfig"
1124 source "drivers/ata/Kconfig"
1126 source "drivers/md/Kconfig"
1128 source "drivers/message/fusion/Kconfig"
1130 source "drivers/ieee1394/Kconfig"
1132 source "drivers/message/i2o/Kconfig"
1134 source "drivers/net/Kconfig"
1136 source "drivers/isdn/Kconfig"
1138 # input before char - char/joystick depends on it. As does USB.
1140 source "drivers/input/Kconfig"
1142 source "drivers/char/Kconfig"
1144 source "drivers/i2c/Kconfig"
1146 source "drivers/spi/Kconfig"
1148 source "drivers/gpio/Kconfig"
1150 source "drivers/w1/Kconfig"
1152 source "drivers/power/Kconfig"
1154 source "drivers/hwmon/Kconfig"
1156 source "drivers/watchdog/Kconfig"
1158 source "drivers/ssb/Kconfig"
1160 #source "drivers/l3/Kconfig"
1162 source "drivers/mfd/Kconfig"
1164 source "drivers/media/Kconfig"
1166 source "drivers/video/Kconfig"
1168 source "sound/Kconfig"
1170 source "drivers/hid/Kconfig"
1172 source "drivers/usb/Kconfig"
1174 source "drivers/mmc/Kconfig"
1176 source "drivers/leds/Kconfig"
1178 source "drivers/rtc/Kconfig"
1180 source "drivers/dma/Kconfig"
1182 source "drivers/dca/Kconfig"
1184 source "drivers/uio/Kconfig"
1190 source "arch/arm/Kconfig.debug"
1192 source "security/Kconfig"
1194 source "crypto/Kconfig"
1196 source "lib/Kconfig"