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 LOCKDEP_SUPPORT
91 config TRACE_IRQFLAGS_SUPPORT
95 config HARDIRQS_SW_RESEND
99 config GENERIC_IRQ_PROBE
103 config GENERIC_LOCKBREAK
106 depends on SMP && PREEMPT
108 config RWSEM_GENERIC_SPINLOCK
112 config RWSEM_XCHGADD_ALGORITHM
115 config ARCH_HAS_ILOG2_U32
119 config ARCH_HAS_ILOG2_U64
123 config GENERIC_HWEIGHT
127 config GENERIC_CALIBRATE_DELAY
131 config ARCH_SUPPORTS_AOUT
134 config ARCH_MAY_HAVE_PC_FDC
141 config GENERIC_ISA_DMA
152 config OPROFILE_ARMV6
154 depends on CPU_V6 && !SMP
155 select OPROFILE_ARM11_CORE
157 config OPROFILE_MPCORE
159 depends on CPU_V6 && SMP
160 select OPROFILE_ARM11_CORE
162 config OPROFILE_ARM11_CORE
169 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
170 default DRAM_BASE if REMAP_VECTORS_TO_RAM
173 The base address of exception vectors.
175 source "init/Kconfig"
180 prompt "ARM system type"
181 default ARCH_VERSATILE
184 bool "Agilent AAEC-2000 based"
187 This enables support for systems based on the Agilent AAEC-2000
189 config ARCH_INTEGRATOR
190 bool "ARM Ltd. Integrator family"
194 Support for ARM's Integrator platform.
197 bool "ARM Ltd. RealView family"
201 select GENERIC_CLOCKEVENTS
203 This enables support for ARM Ltd RealView boards.
205 config ARCH_VERSATILE
206 bool "ARM Ltd. Versatile family"
211 select GENERIC_CLOCKEVENTS
213 This enables support for ARM Ltd Versatile board.
219 This enables support for systems based on the Atmel AT91RM9200,
220 AT91SAM9 and AT91CAP9 processors.
223 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
252 This enables support for the Cirrus EP93xx series of CPUs.
254 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.
296 Support for Intel's 80219 and IOP32X (XScale) family of
305 Support for Intel's IOP33X (XScale) family of processors.
312 Support for Intel's IXP23xx (XScale) family of processors.
315 bool "IXP2400/2800-based"
319 Support for Intel's IXP2400/2800 (XScale) family of processors.
326 select GENERIC_CLOCKEVENTS
328 Support for Intel's IXP4XX (XScale) family of processors.
334 Say Y here if you intend to run this kernel on a LinkUp Systems
335 L7200 Software Development Board which uses an ARM720T processor.
336 Information on this board can be obtained at:
338 <http://www.linkupsys.com/>
340 If you have any questions or comments about the Linux kernel port
341 to this board, send e-mail to <sjhill@cotw.com>.
344 bool "Micrel/Kendin KS8695"
347 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
348 System-on-Chip devices.
351 bool "NetSilicon NS9xxx"
354 select GENERIC_CLOCKEVENTS
356 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
359 <http://www.digi.com/products/microprocessors/index.jsp>
362 bool "Freescale MXC/iMX-based"
365 Support for Freescale MXC/iMX-based family of processors
373 select GENERIC_CLOCKEVENTS
376 Support for the following Marvell Orion 5x series SoCs:
377 Orion-1 (5181), Orion-NAS (5182), Orion-2 (5281.)
380 bool "Philips Nexperia PNX4008 Mobile"
382 This enables support for Philips PNX4008 mobile platform.
385 bool "PXA2xx/PXA3xx-based"
391 select GENERIC_CLOCKEVENTS
394 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
401 select ARCH_MAY_HAVE_PC_FDC
405 On the Acorn Risc-PC, Linux can support the internal IDE disk and
406 CD-ROM interface, serial and parallel port, and the floppy drive.
411 select ARCH_DISCONTIGMEM_ENABLE
412 select ARCH_SPARSEMEM_ENABLE
413 select ARCH_SELECT_MEMORY_MODEL
417 select GENERIC_CLOCKEVENTS
421 Support for StrongARM 11x0 based boards.
424 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
427 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
428 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
429 the Samsung SMDK2410 development board (and derivatives).
437 Support for the StrongARM based Digital DNARD machine, also known
438 as "Shark" (<http://www.shark-linux.de/shark.html>).
443 Say Y here for systems based on one of the Sharp LH7A40X
444 System on a Chip processors. These CPUs include an ARM922T
445 core with a wide array of integrated devices for
446 hand-held and low-power applications.
451 select GENERIC_CLOCKEVENTS
454 Support for TI's DaVinci platform.
461 select GENERIC_CLOCKEVENTS
463 Support for TI's OMAP platform (OMAP1 and OMAP2).
466 bool "Qualcomm MSM7X00A"
468 select GENERIC_CLOCKEVENTS
470 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
471 apps processor of the MSM7X00A and depends on a shared memory
472 interface to the ARM9 modem processor which runs the baseband stack
473 and controls some vital subsystems (clock and power control, etc).
474 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
478 source "arch/arm/mach-clps711x/Kconfig"
480 source "arch/arm/mach-ep93xx/Kconfig"
482 source "arch/arm/mach-footbridge/Kconfig"
484 source "arch/arm/mach-integrator/Kconfig"
486 source "arch/arm/mach-iop32x/Kconfig"
488 source "arch/arm/mach-iop33x/Kconfig"
490 source "arch/arm/mach-iop13xx/Kconfig"
492 source "arch/arm/mach-ixp4xx/Kconfig"
494 source "arch/arm/mach-ixp2000/Kconfig"
496 source "arch/arm/mach-ixp23xx/Kconfig"
498 source "arch/arm/mach-pxa/Kconfig"
500 source "arch/arm/mach-sa1100/Kconfig"
502 source "arch/arm/plat-omap/Kconfig"
504 source "arch/arm/mach-omap1/Kconfig"
506 source "arch/arm/mach-omap2/Kconfig"
508 source "arch/arm/mach-orion5x/Kconfig"
510 source "arch/arm/plat-s3c24xx/Kconfig"
511 source "arch/arm/plat-s3c/Kconfig"
514 source "arch/arm/mach-s3c2400/Kconfig"
515 source "arch/arm/mach-s3c2410/Kconfig"
516 source "arch/arm/mach-s3c2412/Kconfig"
517 source "arch/arm/mach-s3c2440/Kconfig"
518 source "arch/arm/mach-s3c2442/Kconfig"
519 source "arch/arm/mach-s3c2443/Kconfig"
522 source "arch/arm/mach-lh7a40x/Kconfig"
524 source "arch/arm/mach-imx/Kconfig"
526 source "arch/arm/mach-h720x/Kconfig"
528 source "arch/arm/mach-versatile/Kconfig"
530 source "arch/arm/mach-aaec2000/Kconfig"
532 source "arch/arm/mach-realview/Kconfig"
534 source "arch/arm/mach-at91/Kconfig"
536 source "arch/arm/plat-mxc/Kconfig"
538 source "arch/arm/mach-netx/Kconfig"
540 source "arch/arm/mach-ns9xxx/Kconfig"
542 source "arch/arm/mach-davinci/Kconfig"
544 source "arch/arm/mach-ks8695/Kconfig"
546 source "arch/arm/mach-msm/Kconfig"
548 # 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 || MACH_REALVIEW_PB11MP)
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 || MACH_REALVIEW_PB11MP)
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.
769 config ARCH_SPARSEMEM_ENABLE
772 config ARCH_SELECT_MEMORY_MODEL
777 default "4" if ARCH_LH7A40X
779 depends on NEED_MULTIPLE_NODES
784 bool "Timer and CPU usage LEDs"
785 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
786 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
787 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
788 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
789 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
790 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
791 ARCH_KS8695 || MACH_RD88F5182
793 If you say Y here, the LEDs on your machine will be used
794 to provide useful information about your current system status.
796 If you are compiling a kernel for a NetWinder or EBSA-285, you will
797 be able to select which LEDs are active using the options below. If
798 you are compiling a kernel for the EBSA-110 or the LART however, the
799 red LED will simply flash regularly to indicate that the system is
800 still functional. It is safe to say Y here if you have a CATS
801 system, but the driver will do nothing.
804 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
805 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
806 || MACH_OMAP_PERSEUS2
808 depends on !GENERIC_CLOCKEVENTS
809 default y if ARCH_EBSA110
811 If you say Y here, one of the system LEDs (the green one on the
812 NetWinder, the amber one on the EBSA285, or the red one on the LART)
813 will flash regularly to indicate that the system is still
814 operational. This is mainly useful to kernel hackers who are
815 debugging unstable kernels.
817 The LART uses the same LED for both Timer LED and CPU usage LED
818 functions. You may choose to use both, but the Timer LED function
819 will overrule the CPU usage LED.
822 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
824 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
825 || MACH_OMAP_PERSEUS2
828 If you say Y here, the red LED will be used to give a good real
829 time indication of CPU usage, by lighting whenever the idle task
830 is not currently executing.
832 The LART uses the same LED for both Timer LED and CPU usage LED
833 functions. You may choose to use both, but the Timer LED function
834 will overrule the CPU usage LED.
836 config ALIGNMENT_TRAP
838 depends on CPU_CP15_MMU
839 default y if !ARCH_EBSA110
841 ARM processors cannot fetch/store information which is not
842 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
843 address divisible by 4. On 32-bit ARM processors, these non-aligned
844 fetch/store instructions will be emulated in software if you say
845 here, which has a severe performance impact. This is necessary for
846 correct operation of some network protocols. With an IP-only
847 configuration it is safe to say N, otherwise say Y.
853 # Compressed boot loader in ROM. Yes, we really want to ask about
854 # TEXT and BSS so we preserve their values in the config files.
855 config ZBOOT_ROM_TEXT
856 hex "Compressed ROM boot loader base address"
859 The physical address at which the ROM-able zImage is to be
860 placed in the target. Platforms which normally make use of
861 ROM-able zImage formats normally set this to a suitable
862 value in their defconfig file.
864 If ZBOOT_ROM is not enabled, this has no effect.
867 hex "Compressed ROM boot loader BSS address"
870 The base address of an area of read/write memory in the target
871 for the ROM-able zImage which must be available while the
872 decompressor is running. It must be large enough to hold the
873 entire decompressed kernel plus an additional 128 KiB.
874 Platforms which normally make use of ROM-able zImage formats
875 normally set this to a suitable value in their defconfig file.
877 If ZBOOT_ROM is not enabled, this has no effect.
880 bool "Compressed boot loader in ROM/flash"
881 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
883 Say Y here if you intend to execute your compressed kernel image
884 (zImage) directly from ROM or flash. If unsure, say N.
887 string "Default kernel command string"
890 On some architectures (EBSA110 and CATS), there is currently no way
891 for the boot loader to pass arguments to the kernel. For these
892 architectures, you should supply some command-line options at build
893 time by entering them here. As a minimum, you should specify the
894 memory size and the root device (e.g., mem=64M root=/dev/nfs).
897 bool "Kernel Execute-In-Place from ROM"
898 depends on !ZBOOT_ROM
900 Execute-In-Place allows the kernel to run from non-volatile storage
901 directly addressable by the CPU, such as NOR flash. This saves RAM
902 space since the text section of the kernel is not loaded from flash
903 to RAM. Read-write sections, such as the data section and stack,
904 are still copied to RAM. The XIP kernel is not compressed since
905 it has to run directly from flash, so it will take more space to
906 store it. The flash address used to link the kernel object files,
907 and for storing it, is configuration dependent. Therefore, if you
908 say Y here, you must know the proper physical address where to
909 store the kernel image depending on your own flash memory usage.
911 Also note that the make target becomes "make xipImage" rather than
912 "make zImage" or "make Image". The final kernel binary to put in
913 ROM memory will be arch/arm/boot/xipImage.
918 hex "XIP Kernel Physical Location"
919 depends on XIP_KERNEL
922 This is the physical address in your flash memory the kernel will
923 be linked for and stored to. This address is dependent on your
927 bool "Kexec system call (EXPERIMENTAL)"
928 depends on EXPERIMENTAL
930 kexec is a system call that implements the ability to shutdown your
931 current kernel, and to start another kernel. It is like a reboot
932 but it is independent of the system firmware. And like a reboot
933 you can start any kernel with it, not just Linux.
935 It is an ongoing process to be certain the hardware in a machine
936 is properly shutdown, so do not be surprised if this code does not
937 initially work for you. It may help to enable device hotplugging
941 bool "Export atags in procfs"
945 Should the atags used to boot the kernel be exported in an "atags"
946 file in procfs. Useful with kexec.
950 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
952 menu "CPU Frequency scaling"
954 source "drivers/cpufreq/Kconfig"
956 config CPU_FREQ_SA1100
958 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
961 config CPU_FREQ_SA1110
963 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
966 config CPU_FREQ_INTEGRATOR
967 tristate "CPUfreq driver for ARM Integrator CPUs"
968 depends on ARCH_INTEGRATOR && CPU_FREQ
971 This enables the CPUfreq driver for ARM Integrator CPUs.
973 For details, take a look at <file:Documentation/cpu-freq>.
978 tristate "CPUfreq driver for i.MX CPUs"
979 depends on ARCH_IMX && CPU_FREQ
982 This enables the CPUfreq driver for i.MX CPUs.
988 depends on CPU_FREQ && ARCH_PXA && PXA25x
990 select CPU_FREQ_DEFAULT_GOV_USERSPACE
996 menu "Floating point emulation"
998 comment "At least one emulation must be selected"
1001 bool "NWFPE math emulation"
1002 depends on !AEABI || OABI_COMPAT
1004 Say Y to include the NWFPE floating point emulator in the kernel.
1005 This is necessary to run most binaries. Linux does not currently
1006 support floating point hardware so you need to say Y here even if
1007 your machine has an FPA or floating point co-processor podule.
1009 You may say N here if you are going to load the Acorn FPEmulator
1010 early in the bootup.
1013 bool "Support extended precision"
1014 depends on FPE_NWFPE
1016 Say Y to include 80-bit support in the kernel floating-point
1017 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1018 Note that gcc does not generate 80-bit operations by default,
1019 so in most cases this option only enlarges the size of the
1020 floating point emulator without any good reason.
1022 You almost surely want to say N here.
1025 bool "FastFPE math emulation (EXPERIMENTAL)"
1026 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1028 Say Y here to include the FAST floating point emulator in the kernel.
1029 This is an experimental much faster emulator which now also has full
1030 precision for the mantissa. It does not support any exceptions.
1031 It is very simple, and approximately 3-6 times faster than NWFPE.
1033 It should be sufficient for most programs. It may be not suitable
1034 for scientific calculations, but you have to check this for yourself.
1035 If you do not feel you need a faster FP emulation you should better
1039 bool "VFP-format floating point maths"
1040 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1042 Say Y to include VFP support code in the kernel. This is needed
1043 if your hardware includes a VFP unit.
1045 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1046 release notes and additional status information.
1048 Say N if your target does not have VFP hardware.
1056 bool "Advanced SIMD (NEON) Extension support"
1057 depends on VFPv3 && CPU_V7
1059 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1064 menu "Userspace binary formats"
1066 source "fs/Kconfig.binfmt"
1069 tristate "RISC OS personality"
1072 Say Y here to include the kernel code necessary if you want to run
1073 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1074 experimental; if this sounds frightening, say N and sleep in peace.
1075 You can also say M here to compile this support as a module (which
1076 will be called arthur).
1080 menu "Power management options"
1082 source "kernel/power/Kconfig"
1084 config ARCH_SUSPEND_POSSIBLE
1089 source "net/Kconfig"
1091 menu "Device Drivers"
1093 source "drivers/base/Kconfig"
1095 source "drivers/connector/Kconfig"
1097 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1098 source "drivers/mtd/Kconfig"
1101 source "drivers/parport/Kconfig"
1103 source "drivers/pnp/Kconfig"
1105 source "drivers/block/Kconfig"
1107 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1109 source "drivers/misc/Kconfig"
1111 source "drivers/ide/Kconfig"
1113 source "drivers/scsi/Kconfig"
1115 source "drivers/ata/Kconfig"
1117 source "drivers/md/Kconfig"
1119 source "drivers/message/fusion/Kconfig"
1121 source "drivers/ieee1394/Kconfig"
1123 source "drivers/message/i2o/Kconfig"
1125 source "drivers/net/Kconfig"
1127 source "drivers/isdn/Kconfig"
1129 # input before char - char/joystick depends on it. As does USB.
1131 source "drivers/input/Kconfig"
1133 source "drivers/char/Kconfig"
1135 source "drivers/i2c/Kconfig"
1137 source "drivers/spi/Kconfig"
1139 source "drivers/gpio/Kconfig"
1141 source "drivers/w1/Kconfig"
1143 source "drivers/power/Kconfig"
1145 source "drivers/hwmon/Kconfig"
1147 source "drivers/watchdog/Kconfig"
1149 source "drivers/ssb/Kconfig"
1151 #source "drivers/l3/Kconfig"
1153 source "drivers/mfd/Kconfig"
1155 source "drivers/media/Kconfig"
1157 source "drivers/video/Kconfig"
1159 source "sound/Kconfig"
1161 source "drivers/hid/Kconfig"
1163 source "drivers/usb/Kconfig"
1165 source "drivers/mmc/Kconfig"
1167 source "drivers/leds/Kconfig"
1169 source "drivers/rtc/Kconfig"
1171 source "drivers/dma/Kconfig"
1173 source "drivers/dca/Kconfig"
1175 source "drivers/uio/Kconfig"
1181 source "arch/arm/Kconfig.debug"
1183 source "security/Kconfig"
1185 source "crypto/Kconfig"
1187 source "lib/Kconfig"