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
150 config GENERIC_HARDIRQS_NO__DO_IRQ
156 config OPROFILE_ARMV6
158 depends on CPU_V6 && !SMP
159 select OPROFILE_ARM11_CORE
161 config OPROFILE_MPCORE
163 depends on CPU_V6 && SMP
164 select OPROFILE_ARM11_CORE
166 config OPROFILE_ARM11_CORE
173 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
174 default DRAM_BASE if REMAP_VECTORS_TO_RAM
177 The base address of exception vectors.
179 source "init/Kconfig"
184 prompt "ARM system type"
185 default ARCH_VERSATILE
188 bool "Agilent AAEC-2000 based"
191 This enables support for systems based on the Agilent AAEC-2000
193 config ARCH_INTEGRATOR
194 bool "ARM Ltd. Integrator family"
198 Support for ARM's Integrator platform.
201 bool "ARM Ltd. RealView family"
205 select GENERIC_CLOCKEVENTS
207 This enables support for ARM Ltd RealView boards.
209 config ARCH_VERSATILE
210 bool "ARM Ltd. Versatile family"
215 select GENERIC_CLOCKEVENTS
217 This enables support for ARM Ltd Versatile board.
223 This enables support for systems based on the Atmel AT91RM9200,
224 AT91SAM9 and AT91CAP9 processors.
227 bool "Cirrus CL-PS7500FE"
232 Support for the Cirrus Logic PS7500FE system-on-a-chip.
235 bool "Cirrus Logic CLPS711x/EP721x-based"
237 Support for Cirrus Logic 711x/721x based boards.
242 select FOOTBRIDGE_ADDIN
244 Support for Intel's EBSA285 companion chip.
251 This is an evaluation board for the StrongARM processor available
252 from Digital. It has limited hardware on-board, including an
253 Ethernet interface, two PCMCIA sockets, two serial ports and a
263 This enables support for the Cirrus EP93xx series of CPUs.
265 config ARCH_FOOTBRIDGE
269 Support for systems based on the DC21285 companion chip
270 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
273 bool "Hilscher NetX based"
276 This enables support for systems based on the Hilscher NetX Soc
279 bool "Hynix HMS720x-based"
282 This enables support for systems based on the Hynix HMS720x
288 select GENERIC_CLOCKEVENTS
290 Support for Motorola's i.MX family of processors (MX1, MXL).
297 select ARCH_SUPPORTS_MSI
299 Support for Intel's IOP13XX (XScale) family of processors.
307 Support for Intel's 80219 and IOP32X (XScale) family of
316 Support for Intel's IOP33X (XScale) family of processors.
323 Support for Intel's IXP23xx (XScale) family of processors.
326 bool "IXP2400/2800-based"
330 Support for Intel's IXP2400/2800 (XScale) family of processors.
337 select GENERIC_CLOCKEVENTS
339 Support for Intel's IXP4XX (XScale) family of processors.
345 Say Y here if you intend to run this kernel on a LinkUp Systems
346 L7200 Software Development Board which uses an ARM720T processor.
347 Information on this board can be obtained at:
349 <http://www.linkupsys.com/>
351 If you have any questions or comments about the Linux kernel port
355 bool "Micrel/Kendin KS8695"
358 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
359 System-on-Chip devices.
362 bool "NetSilicon NS9xxx"
365 select GENERIC_CLOCKEVENTS
367 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
370 <http://www.digi.com/products/microprocessors/index.jsp>
373 bool "Freescale MXC/iMX-based"
376 Support for Freescale MXC/iMX-based family of processors
384 select GENERIC_CLOCKEVENTS
387 Support for the following Marvell Orion 5x series SoCs:
388 Orion-1 (5181), Orion-NAS (5182), Orion-2 (5281.)
391 bool "Philips Nexperia PNX4008 Mobile"
393 This enables support for Philips PNX4008 mobile platform.
396 bool "PXA2xx/PXA3xx-based"
402 select GENERIC_CLOCKEVENTS
405 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
412 select ARCH_MAY_HAVE_PC_FDC
416 On the Acorn Risc-PC, Linux can support the internal IDE disk and
417 CD-ROM interface, serial and parallel port, and the floppy drive.
422 select ARCH_DISCONTIGMEM_ENABLE
423 select ARCH_SPARSEMEM_ENABLE
424 select ARCH_SELECT_MEMORY_MODEL
428 select GENERIC_CLOCKEVENTS
432 Support for StrongARM 11x0 based boards.
435 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
438 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
439 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
440 the Samsung SMDK2410 development board (and derivatives).
448 Support for the StrongARM based Digital DNARD machine, also known
449 as "Shark" (<http://www.shark-linux.de/shark.html>).
454 Say Y here for systems based on one of the Sharp LH7A40X
455 System on a Chip processors. These CPUs include an ARM922T
456 core with a wide array of integrated devices for
457 hand-held and low-power applications.
462 select GENERIC_CLOCKEVENTS
465 Support for TI's DaVinci platform.
472 select GENERIC_CLOCKEVENTS
474 Support for TI's OMAP platform (OMAP1 and OMAP2).
477 bool "Qualcomm MSM7X00A"
479 select GENERIC_CLOCKEVENTS
481 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
482 apps processor of the MSM7X00A and depends on a shared memory
483 interface to the ARM9 modem processor which runs the baseband stack
484 and controls some vital subsystems (clock and power control, etc).
485 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
489 source "arch/arm/mach-clps711x/Kconfig"
491 source "arch/arm/mach-ep93xx/Kconfig"
493 source "arch/arm/mach-footbridge/Kconfig"
495 source "arch/arm/mach-integrator/Kconfig"
497 source "arch/arm/mach-iop32x/Kconfig"
499 source "arch/arm/mach-iop33x/Kconfig"
501 source "arch/arm/mach-iop13xx/Kconfig"
503 source "arch/arm/mach-ixp4xx/Kconfig"
505 source "arch/arm/mach-ixp2000/Kconfig"
507 source "arch/arm/mach-ixp23xx/Kconfig"
509 source "arch/arm/mach-pxa/Kconfig"
511 source "arch/arm/mach-sa1100/Kconfig"
513 source "arch/arm/plat-omap/Kconfig"
515 source "arch/arm/mach-omap1/Kconfig"
517 source "arch/arm/mach-omap2/Kconfig"
519 source "arch/arm/mach-orion5x/Kconfig"
521 source "arch/arm/plat-s3c24xx/Kconfig"
522 source "arch/arm/plat-s3c/Kconfig"
525 source "arch/arm/mach-s3c2400/Kconfig"
526 source "arch/arm/mach-s3c2410/Kconfig"
527 source "arch/arm/mach-s3c2412/Kconfig"
528 source "arch/arm/mach-s3c2440/Kconfig"
529 source "arch/arm/mach-s3c2442/Kconfig"
530 source "arch/arm/mach-s3c2443/Kconfig"
533 source "arch/arm/mach-lh7a40x/Kconfig"
535 source "arch/arm/mach-imx/Kconfig"
537 source "arch/arm/mach-h720x/Kconfig"
539 source "arch/arm/mach-versatile/Kconfig"
541 source "arch/arm/mach-aaec2000/Kconfig"
543 source "arch/arm/mach-realview/Kconfig"
545 source "arch/arm/mach-at91/Kconfig"
547 source "arch/arm/plat-mxc/Kconfig"
549 source "arch/arm/mach-netx/Kconfig"
551 source "arch/arm/mach-ns9xxx/Kconfig"
553 source "arch/arm/mach-davinci/Kconfig"
555 source "arch/arm/mach-ks8695/Kconfig"
557 source "arch/arm/mach-msm/Kconfig"
559 # Definitions to make life easier
569 source arch/arm/mm/Kconfig
572 bool "Enable iWMMXt support"
573 depends on CPU_XSCALE || CPU_XSC3
574 default y if PXA27x || PXA3xx
576 Enable support for iWMMXt context switching at run time if
577 running on a CPU that supports it.
579 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
582 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
586 source "arch/arm/Kconfig-nommu"
591 source "arch/arm/common/Kconfig"
593 config FORCE_MAX_ZONEORDER
606 Find out whether you have ISA slots on your motherboard. ISA is the
607 name of a bus system, i.e. the way the CPU talks to the other stuff
608 inside your box. Other bus systems are PCI, EISA, MicroChannel
609 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
610 newer boards don't support it. If you have ISA, say Y, otherwise N.
612 # Select ISA DMA controller support
617 # Select ISA DMA interface
622 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
624 Find out whether you have a PCI motherboard. PCI is the name of a
625 bus system, i.e. the way the CPU talks to the other stuff inside
626 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
627 VESA. If you have PCI, say Y, otherwise N.
632 # Select the host bridge type
633 config PCI_HOST_VIA82C505
635 depends on PCI && ARCH_SHARK
638 config PCI_HOST_ITE8152
640 depends on PCI && MACH_ARMCORE
644 source "drivers/pci/Kconfig"
646 source "drivers/pcmcia/Kconfig"
650 menu "Kernel Features"
652 source "kernel/time/Kconfig"
655 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
656 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
658 This enables support for systems with more than one CPU. If you have
659 a system with only one CPU, like most personal computers, say N. If
660 you have a system with more than one CPU, say Y.
662 If you say N here, the kernel will run on single and multiprocessor
663 machines, but will use only one CPU of a multiprocessor machine. If
664 you say Y here, the kernel will run on many, but not all, single
665 processor machines. On a single processor machine, the kernel will
666 run faster if you say N here.
668 See also <file:Documentation/i386/IO-APIC.txt>,
669 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
670 <http://www.linuxdoc.org/docs.html#howto>.
672 If you don't know what to do here, say N.
675 int "Maximum number of CPUs (2-32)"
681 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
682 depends on SMP && HOTPLUG && EXPERIMENTAL
684 Say Y here to experiment with turning CPUs off and on. CPUs
685 can be controlled through /sys/devices/system/cpu.
688 bool "Use local timer interrupts"
689 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
692 Enable support for local timers on SMP platforms, rather then the
693 legacy IPI broadcast method. Local timers allows the system
694 accounting to be spread across the timer interval, preventing a
695 "thundering herd" at every timer tick.
698 bool "Preemptible Kernel (EXPERIMENTAL)"
699 depends on EXPERIMENTAL
701 This option reduces the latency of the kernel when reacting to
702 real-time or interactive events by allowing a low priority process to
703 be preempted even if it is in kernel mode executing a system call.
704 This allows applications to run more reliably even when the system is
707 Say Y here if you are building a kernel for a desktop, embedded
708 or real-time system. Say N if you are unsure.
711 bool "Dynamic tick timer"
712 depends on !GENERIC_CLOCKEVENTS
714 Select this option if you want to disable continuous timer ticks
715 and have them programmed to occur as required. This option saves
716 power as the system can remain in idle state for longer.
718 By default dynamic tick is disabled during the boot, and can be
719 manually enabled with:
721 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
723 Alternatively, if you want dynamic tick automatically enabled
724 during boot, pass "dyntick=enable" via the kernel command string.
726 Please note that dynamic tick may affect the accuracy of
727 timekeeping on some platforms depending on the implementation.
728 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
729 to have accurate timekeeping with dynamic tick.
733 default 128 if ARCH_L7200
734 default 200 if ARCH_EBSA110 || ARCH_S3C2410
735 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
736 default AT91_TIMER_HZ if ARCH_AT91
740 bool "Use the ARM EABI to compile the kernel"
742 This option allows for the kernel to be compiled using the latest
743 ARM ABI (aka EABI). This is only useful if you are using a user
744 space environment that is also compiled with EABI.
746 Since there are major incompatibilities between the legacy ABI and
747 EABI, especially with regard to structure member alignment, this
748 option also changes the kernel syscall calling convention to
749 disambiguate both ABIs and allow for backward compatibility support
750 (selected with CONFIG_OABI_COMPAT).
752 To use this you need GCC version 4.0.0 or later.
755 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
756 depends on AEABI && EXPERIMENTAL
759 This option preserves the old syscall interface along with the
760 new (ARM EABI) one. It also provides a compatibility layer to
761 intercept syscalls that have structure arguments which layout
762 in memory differs between the legacy ABI and the new ARM EABI
763 (only for non "thumb" binaries). This option adds a tiny
764 overhead to all syscalls and produces a slightly larger kernel.
765 If you know you'll be using only pure EABI user space then you
766 can say N here. If this option is not selected and you attempt
767 to execute a legacy ABI binary then the result will be
768 UNPREDICTABLE (in fact it can be predicted that it won't work
769 at all). If in doubt say Y.
771 config ARCH_DISCONTIGMEM_ENABLE
773 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
775 Say Y to support efficient handling of discontiguous physical memory,
776 for architectures which are either NUMA (Non-Uniform Memory Access)
777 or have huge holes in the physical address space for other reasons.
778 See <file:Documentation/vm/numa> for more.
780 config ARCH_SPARSEMEM_ENABLE
783 config ARCH_SELECT_MEMORY_MODEL
788 default "4" if ARCH_LH7A40X
790 depends on NEED_MULTIPLE_NODES
795 bool "Timer and CPU usage LEDs"
796 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
797 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
798 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
799 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
800 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
801 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
802 ARCH_KS8695 || MACH_RD88F5182
804 If you say Y here, the LEDs on your machine will be used
805 to provide useful information about your current system status.
807 If you are compiling a kernel for a NetWinder or EBSA-285, you will
808 be able to select which LEDs are active using the options below. If
809 you are compiling a kernel for the EBSA-110 or the LART however, the
810 red LED will simply flash regularly to indicate that the system is
811 still functional. It is safe to say Y here if you have a CATS
812 system, but the driver will do nothing.
815 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
816 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
817 || MACH_OMAP_PERSEUS2
819 depends on !GENERIC_CLOCKEVENTS
820 default y if ARCH_EBSA110
822 If you say Y here, one of the system LEDs (the green one on the
823 NetWinder, the amber one on the EBSA285, or the red one on the LART)
824 will flash regularly to indicate that the system is still
825 operational. This is mainly useful to kernel hackers who are
826 debugging unstable kernels.
828 The LART uses the same LED for both Timer LED and CPU usage LED
829 functions. You may choose to use both, but the Timer LED function
830 will overrule the CPU usage LED.
833 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
835 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
836 || MACH_OMAP_PERSEUS2
839 If you say Y here, the red LED will be used to give a good real
840 time indication of CPU usage, by lighting whenever the idle task
841 is not currently executing.
843 The LART uses the same LED for both Timer LED and CPU usage LED
844 functions. You may choose to use both, but the Timer LED function
845 will overrule the CPU usage LED.
847 config ALIGNMENT_TRAP
849 depends on CPU_CP15_MMU
850 default y if !ARCH_EBSA110
852 ARM processors cannot fetch/store information which is not
853 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
854 address divisible by 4. On 32-bit ARM processors, these non-aligned
855 fetch/store instructions will be emulated in software if you say
856 here, which has a severe performance impact. This is necessary for
857 correct operation of some network protocols. With an IP-only
858 configuration it is safe to say N, otherwise say Y.
864 # Compressed boot loader in ROM. Yes, we really want to ask about
865 # TEXT and BSS so we preserve their values in the config files.
866 config ZBOOT_ROM_TEXT
867 hex "Compressed ROM boot loader base address"
870 The physical address at which the ROM-able zImage is to be
871 placed in the target. Platforms which normally make use of
872 ROM-able zImage formats normally set this to a suitable
873 value in their defconfig file.
875 If ZBOOT_ROM is not enabled, this has no effect.
878 hex "Compressed ROM boot loader BSS address"
881 The base address of an area of read/write memory in the target
882 for the ROM-able zImage which must be available while the
883 decompressor is running. It must be large enough to hold the
884 entire decompressed kernel plus an additional 128 KiB.
885 Platforms which normally make use of ROM-able zImage formats
886 normally set this to a suitable value in their defconfig file.
888 If ZBOOT_ROM is not enabled, this has no effect.
891 bool "Compressed boot loader in ROM/flash"
892 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
894 Say Y here if you intend to execute your compressed kernel image
895 (zImage) directly from ROM or flash. If unsure, say N.
898 string "Default kernel command string"
901 On some architectures (EBSA110 and CATS), there is currently no way
902 for the boot loader to pass arguments to the kernel. For these
903 architectures, you should supply some command-line options at build
904 time by entering them here. As a minimum, you should specify the
905 memory size and the root device (e.g., mem=64M root=/dev/nfs).
908 bool "Kernel Execute-In-Place from ROM"
909 depends on !ZBOOT_ROM
911 Execute-In-Place allows the kernel to run from non-volatile storage
912 directly addressable by the CPU, such as NOR flash. This saves RAM
913 space since the text section of the kernel is not loaded from flash
914 to RAM. Read-write sections, such as the data section and stack,
915 are still copied to RAM. The XIP kernel is not compressed since
916 it has to run directly from flash, so it will take more space to
917 store it. The flash address used to link the kernel object files,
918 and for storing it, is configuration dependent. Therefore, if you
919 say Y here, you must know the proper physical address where to
920 store the kernel image depending on your own flash memory usage.
922 Also note that the make target becomes "make xipImage" rather than
923 "make zImage" or "make Image". The final kernel binary to put in
924 ROM memory will be arch/arm/boot/xipImage.
929 hex "XIP Kernel Physical Location"
930 depends on XIP_KERNEL
933 This is the physical address in your flash memory the kernel will
934 be linked for and stored to. This address is dependent on your
938 bool "Kexec system call (EXPERIMENTAL)"
939 depends on EXPERIMENTAL
941 kexec is a system call that implements the ability to shutdown your
942 current kernel, and to start another kernel. It is like a reboot
943 but it is independent of the system firmware. And like a reboot
944 you can start any kernel with it, not just Linux.
946 It is an ongoing process to be certain the hardware in a machine
947 is properly shutdown, so do not be surprised if this code does not
948 initially work for you. It may help to enable device hotplugging
952 bool "Export atags in procfs"
956 Should the atags used to boot the kernel be exported in an "atags"
957 file in procfs. Useful with kexec.
961 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
963 menu "CPU Frequency scaling"
965 source "drivers/cpufreq/Kconfig"
967 config CPU_FREQ_SA1100
969 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
972 config CPU_FREQ_SA1110
974 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
977 config CPU_FREQ_INTEGRATOR
978 tristate "CPUfreq driver for ARM Integrator CPUs"
979 depends on ARCH_INTEGRATOR && CPU_FREQ
982 This enables the CPUfreq driver for ARM Integrator CPUs.
984 For details, take a look at <file:Documentation/cpu-freq>.
989 tristate "CPUfreq driver for i.MX CPUs"
990 depends on ARCH_IMX && CPU_FREQ
993 This enables the CPUfreq driver for i.MX CPUs.
999 depends on CPU_FREQ && ARCH_PXA && PXA25x
1001 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1007 menu "Floating point emulation"
1009 comment "At least one emulation must be selected"
1012 bool "NWFPE math emulation"
1013 depends on !AEABI || OABI_COMPAT
1015 Say Y to include the NWFPE floating point emulator in the kernel.
1016 This is necessary to run most binaries. Linux does not currently
1017 support floating point hardware so you need to say Y here even if
1018 your machine has an FPA or floating point co-processor podule.
1020 You may say N here if you are going to load the Acorn FPEmulator
1021 early in the bootup.
1024 bool "Support extended precision"
1025 depends on FPE_NWFPE
1027 Say Y to include 80-bit support in the kernel floating-point
1028 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1029 Note that gcc does not generate 80-bit operations by default,
1030 so in most cases this option only enlarges the size of the
1031 floating point emulator without any good reason.
1033 You almost surely want to say N here.
1036 bool "FastFPE math emulation (EXPERIMENTAL)"
1037 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1039 Say Y here to include the FAST floating point emulator in the kernel.
1040 This is an experimental much faster emulator which now also has full
1041 precision for the mantissa. It does not support any exceptions.
1042 It is very simple, and approximately 3-6 times faster than NWFPE.
1044 It should be sufficient for most programs. It may be not suitable
1045 for scientific calculations, but you have to check this for yourself.
1046 If you do not feel you need a faster FP emulation you should better
1050 bool "VFP-format floating point maths"
1051 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1053 Say Y to include VFP support code in the kernel. This is needed
1054 if your hardware includes a VFP unit.
1056 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1057 release notes and additional status information.
1059 Say N if your target does not have VFP hardware.
1067 bool "Advanced SIMD (NEON) Extension support"
1068 depends on VFPv3 && CPU_V7
1070 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1075 menu "Userspace binary formats"
1077 source "fs/Kconfig.binfmt"
1080 tristate "RISC OS personality"
1083 Say Y here to include the kernel code necessary if you want to run
1084 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1085 experimental; if this sounds frightening, say N and sleep in peace.
1086 You can also say M here to compile this support as a module (which
1087 will be called arthur).
1091 menu "Power management options"
1093 source "kernel/power/Kconfig"
1095 config ARCH_SUSPEND_POSSIBLE
1100 source "net/Kconfig"
1102 menu "Device Drivers"
1104 source "drivers/base/Kconfig"
1106 source "drivers/connector/Kconfig"
1108 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1109 source "drivers/mtd/Kconfig"
1112 source "drivers/parport/Kconfig"
1114 source "drivers/pnp/Kconfig"
1116 source "drivers/block/Kconfig"
1118 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1120 source "drivers/misc/Kconfig"
1122 source "drivers/ide/Kconfig"
1124 source "drivers/scsi/Kconfig"
1126 source "drivers/ata/Kconfig"
1128 source "drivers/md/Kconfig"
1130 source "drivers/message/fusion/Kconfig"
1132 source "drivers/ieee1394/Kconfig"
1134 source "drivers/message/i2o/Kconfig"
1136 source "drivers/net/Kconfig"
1138 source "drivers/isdn/Kconfig"
1140 # input before char - char/joystick depends on it. As does USB.
1142 source "drivers/input/Kconfig"
1144 source "drivers/char/Kconfig"
1146 source "drivers/i2c/Kconfig"
1148 source "drivers/spi/Kconfig"
1150 source "drivers/gpio/Kconfig"
1152 source "drivers/w1/Kconfig"
1154 source "drivers/power/Kconfig"
1156 source "drivers/hwmon/Kconfig"
1158 source "drivers/watchdog/Kconfig"
1160 source "drivers/ssb/Kconfig"
1162 #source "drivers/l3/Kconfig"
1164 source "drivers/mfd/Kconfig"
1166 source "drivers/media/Kconfig"
1168 source "drivers/video/Kconfig"
1170 source "sound/Kconfig"
1172 source "drivers/hid/Kconfig"
1174 source "drivers/usb/Kconfig"
1176 source "drivers/mmc/Kconfig"
1178 source "drivers/leds/Kconfig"
1180 source "drivers/rtc/Kconfig"
1182 source "drivers/dma/Kconfig"
1184 source "drivers/dca/Kconfig"
1186 source "drivers/uio/Kconfig"
1192 source "arch/arm/Kconfig.debug"
1194 source "security/Kconfig"
1196 source "crypto/Kconfig"
1198 source "lib/Kconfig"