2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
6 mainmenu "Linux Kernel Configuration"
12 select SYS_SUPPORTS_APM_EMULATION
14 select HAVE_KPROBES if (!XIP_KERNEL)
15 select HAVE_KRETPROBES if (HAVE_KPROBES)
17 The ARM series is a line of low-power-consumption RISC chip designs
18 licensed by ARM Ltd and targeted at embedded applications and
19 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
20 manufactured, but legacy ARM-based PC hardware remains popular in
21 Europe. There is an ARM Linux project with a web page at
22 <http://www.arm.linux.org.uk/>.
24 config SYS_SUPPORTS_APM_EMULATION
35 config GENERIC_CLOCKEVENTS
39 config GENERIC_CLOCKEVENTS_BROADCAST
41 depends on GENERIC_CLOCKEVENTS
42 default y if SMP && !LOCAL_TIMERS
55 The Extended Industry Standard Architecture (EISA) bus was
56 developed as an open alternative to the IBM MicroChannel bus.
58 The EISA bus provided some of the features of the IBM MicroChannel
59 bus while maintaining backward compatibility with cards made for
60 the older ISA bus. The EISA bus saw limited use between 1988 and
61 1995 when it was made obsolete by the PCI bus.
63 Say Y here if you are building a kernel for an EISA-based machine.
73 MicroChannel Architecture is found in some IBM PS/2 machines and
74 laptops. It is a bus system similar to PCI or ISA. See
75 <file:Documentation/mca.txt> (and especially the web page given
76 there) before attempting to build an MCA bus kernel.
78 config GENERIC_HARDIRQS
82 config STACKTRACE_SUPPORT
86 config LOCKDEP_SUPPORT
90 config TRACE_IRQFLAGS_SUPPORT
94 config HARDIRQS_SW_RESEND
98 config GENERIC_IRQ_PROBE
102 config GENERIC_LOCKBREAK
105 depends on SMP && PREEMPT
107 config RWSEM_GENERIC_SPINLOCK
111 config RWSEM_XCHGADD_ALGORITHM
114 config ARCH_HAS_ILOG2_U32
118 config ARCH_HAS_ILOG2_U64
122 config GENERIC_HWEIGHT
126 config GENERIC_CALIBRATE_DELAY
130 config ARCH_SUPPORTS_AOUT
133 config ARCH_MAY_HAVE_PC_FDC
140 config GENERIC_ISA_DMA
151 config OPROFILE_ARMV6
153 depends on CPU_V6 && !SMP
154 select OPROFILE_ARM11_CORE
156 config OPROFILE_MPCORE
158 depends on CPU_V6 && SMP
159 select OPROFILE_ARM11_CORE
161 config OPROFILE_ARM11_CORE
168 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
169 default DRAM_BASE if REMAP_VECTORS_TO_RAM
172 The base address of exception vectors.
174 source "init/Kconfig"
179 prompt "ARM system type"
180 default ARCH_VERSATILE
183 bool "Agilent AAEC-2000 based"
186 This enables support for systems based on the Agilent AAEC-2000
188 config ARCH_INTEGRATOR
189 bool "ARM Ltd. Integrator family"
193 Support for ARM's Integrator platform.
196 bool "ARM Ltd. RealView family"
200 select GENERIC_CLOCKEVENTS
202 This enables support for ARM Ltd RealView boards.
204 config ARCH_VERSATILE
205 bool "ARM Ltd. Versatile family"
210 select GENERIC_CLOCKEVENTS
212 This enables support for ARM Ltd Versatile board.
218 This enables support for systems based on the Atmel AT91RM9200,
219 AT91SAM9 and AT91CAP9 processors.
222 bool "Cirrus CL-PS7500FE"
228 Support for the Cirrus Logic PS7500FE system-on-a-chip.
231 bool "Cirrus Logic CLPS711x/EP721x-based"
233 Support for Cirrus Logic 711x/721x based boards.
238 select FOOTBRIDGE_ADDIN
241 Support for Intel's EBSA285 companion chip.
248 This is an evaluation board for the StrongARM processor available
249 from Digital. It has limited hardware on-board, including an
250 Ethernet interface, two PCMCIA sockets, two serial ports and a
260 This enables support for the Cirrus EP93xx series of CPUs.
262 config ARCH_FOOTBRIDGE
267 Support for systems based on the DC21285 companion chip
268 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
271 bool "Hilscher NetX based"
274 This enables support for systems based on the Hilscher NetX Soc
277 bool "Hynix HMS720x-based"
280 This enables support for systems based on the Hynix HMS720x
286 select GENERIC_CLOCKEVENTS
288 Support for Motorola's i.MX family of processors (MX1, MXL).
295 select ARCH_SUPPORTS_MSI
297 Support for Intel's IOP13XX (XScale) family of processors.
306 Support for Intel's 80219 and IOP32X (XScale) family of
316 Support for Intel's IOP33X (XScale) family of processors.
324 Support for Intel's IXP23xx (XScale) family of processors.
327 bool "IXP2400/2800-based"
331 Support for Intel's IXP2400/2800 (XScale) family of processors.
338 select GENERIC_CLOCKEVENTS
341 Support for Intel's IXP4XX (XScale) family of processors.
348 Say Y here if you intend to run this kernel on a LinkUp Systems
349 L7200 Software Development Board which uses an ARM720T processor.
350 Information on this board can be obtained at:
352 <http://www.linkupsys.com/>
354 If you have any questions or comments about the Linux kernel port
355 to this board, send e-mail to <sjhill@cotw.com>.
358 bool "Micrel/Kendin KS8695"
361 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
362 System-on-Chip devices.
365 bool "NetSilicon NS9xxx"
368 select GENERIC_CLOCKEVENTS
370 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
373 <http://www.digi.com/products/microprocessors/index.jsp>
376 bool "Freescale MXC/iMX-based"
379 Support for Freescale MXC/iMX-based family of processors
387 select GENERIC_CLOCKEVENTS
390 Support for the following Marvell Orion 5x series SoCs:
391 Orion-1 (5181), Orion-NAS (5182), Orion-2 (5281.)
394 bool "Philips Nexperia PNX4008 Mobile"
396 This enables support for Philips PNX4008 mobile platform.
399 bool "PXA2xx/PXA3xx-based"
406 select GENERIC_CLOCKEVENTS
409 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
416 select ARCH_MAY_HAVE_PC_FDC
421 On the Acorn Risc-PC, Linux can support the internal IDE disk and
422 CD-ROM interface, serial and parallel port, and the floppy drive.
427 select ARCH_DISCONTIGMEM_ENABLE
428 select ARCH_SPARSEMEM_ENABLE
429 select ARCH_SELECT_MEMORY_MODEL
433 select GENERIC_CLOCKEVENTS
438 Support for StrongARM 11x0 based boards.
441 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
445 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
446 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
447 the Samsung SMDK2410 development board (and derivatives).
456 Support for the StrongARM based Digital DNARD machine, also known
457 as "Shark" (<http://www.shark-linux.de/shark.html>).
463 Say Y here for systems based on one of the Sharp LH7A40X
464 System on a Chip processors. These CPUs include an ARM922T
465 core with a wide array of integrated devices for
466 hand-held and low-power applications.
471 select GENERIC_CLOCKEVENTS
474 Support for TI's DaVinci platform.
480 select GENERIC_CLOCKEVENTS
482 Support for TI's OMAP platform (OMAP1 and OMAP2).
485 bool "Qualcomm MSM7X00A"
487 select GENERIC_CLOCKEVENTS
489 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
490 apps processor of the MSM7X00A and depends on a shared memory
491 interface to the ARM9 modem processor which runs the baseband stack
492 and controls some vital subsystems (clock and power control, etc).
493 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
497 source "arch/arm/mach-clps711x/Kconfig"
499 source "arch/arm/mach-ep93xx/Kconfig"
501 source "arch/arm/mach-footbridge/Kconfig"
503 source "arch/arm/mach-integrator/Kconfig"
505 source "arch/arm/mach-iop32x/Kconfig"
507 source "arch/arm/mach-iop33x/Kconfig"
509 source "arch/arm/mach-iop13xx/Kconfig"
511 source "arch/arm/mach-ixp4xx/Kconfig"
513 source "arch/arm/mach-ixp2000/Kconfig"
515 source "arch/arm/mach-ixp23xx/Kconfig"
517 source "arch/arm/mach-pxa/Kconfig"
519 source "arch/arm/mach-sa1100/Kconfig"
521 source "arch/arm/plat-omap/Kconfig"
523 source "arch/arm/mach-omap1/Kconfig"
525 source "arch/arm/mach-omap2/Kconfig"
527 source "arch/arm/mach-orion5x/Kconfig"
529 source "arch/arm/plat-s3c24xx/Kconfig"
530 source "arch/arm/plat-s3c/Kconfig"
533 source "arch/arm/mach-s3c2400/Kconfig"
534 source "arch/arm/mach-s3c2410/Kconfig"
535 source "arch/arm/mach-s3c2412/Kconfig"
536 source "arch/arm/mach-s3c2440/Kconfig"
537 source "arch/arm/mach-s3c2442/Kconfig"
538 source "arch/arm/mach-s3c2443/Kconfig"
541 source "arch/arm/mach-lh7a40x/Kconfig"
543 source "arch/arm/mach-imx/Kconfig"
545 source "arch/arm/mach-h720x/Kconfig"
547 source "arch/arm/mach-versatile/Kconfig"
549 source "arch/arm/mach-aaec2000/Kconfig"
551 source "arch/arm/mach-realview/Kconfig"
553 source "arch/arm/mach-at91/Kconfig"
555 source "arch/arm/plat-mxc/Kconfig"
557 source "arch/arm/mach-netx/Kconfig"
559 source "arch/arm/mach-ns9xxx/Kconfig"
561 source "arch/arm/mach-davinci/Kconfig"
563 source "arch/arm/mach-ks8695/Kconfig"
565 source "arch/arm/mach-msm/Kconfig"
567 # Definitions to make life easier
577 source arch/arm/mm/Kconfig
580 bool "Enable iWMMXt support"
581 depends on CPU_XSCALE || CPU_XSC3
582 default y if PXA27x || PXA3xx
584 Enable support for iWMMXt context switching at run time if
585 running on a CPU that supports it.
587 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
590 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
594 source "arch/arm/Kconfig-nommu"
599 source "arch/arm/common/Kconfig"
601 config FORCE_MAX_ZONEORDER
614 Find out whether you have ISA slots on your motherboard. ISA is the
615 name of a bus system, i.e. the way the CPU talks to the other stuff
616 inside your box. Other bus systems are PCI, EISA, MicroChannel
617 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
618 newer boards don't support it. If you have ISA, say Y, otherwise N.
620 # Select ISA DMA controller support
625 # Select ISA DMA interface
630 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
632 Find out whether you have a PCI motherboard. PCI is the name of a
633 bus system, i.e. the way the CPU talks to the other stuff inside
634 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
635 VESA. If you have PCI, say Y, otherwise N.
640 # Select the host bridge type
641 config PCI_HOST_VIA82C505
643 depends on PCI && ARCH_SHARK
646 config PCI_HOST_ITE8152
648 depends on PCI && MACH_ARMCORE
652 source "drivers/pci/Kconfig"
654 source "drivers/pcmcia/Kconfig"
658 menu "Kernel Features"
660 source "kernel/time/Kconfig"
663 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
664 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
666 This enables support for systems with more than one CPU. If you have
667 a system with only one CPU, like most personal computers, say N. If
668 you have a system with more than one CPU, say Y.
670 If you say N here, the kernel will run on single and multiprocessor
671 machines, but will use only one CPU of a multiprocessor machine. If
672 you say Y here, the kernel will run on many, but not all, single
673 processor machines. On a single processor machine, the kernel will
674 run faster if you say N here.
676 See also <file:Documentation/i386/IO-APIC.txt>,
677 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
678 <http://www.linuxdoc.org/docs.html#howto>.
680 If you don't know what to do here, say N.
683 int "Maximum number of CPUs (2-32)"
689 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
690 depends on SMP && HOTPLUG && EXPERIMENTAL
692 Say Y here to experiment with turning CPUs off and on. CPUs
693 can be controlled through /sys/devices/system/cpu.
696 bool "Use local timer interrupts"
697 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
700 Enable support for local timers on SMP platforms, rather then the
701 legacy IPI broadcast method. Local timers allows the system
702 accounting to be spread across the timer interval, preventing a
703 "thundering herd" at every timer tick.
706 bool "Preemptible Kernel (EXPERIMENTAL)"
707 depends on EXPERIMENTAL
709 This option reduces the latency of the kernel when reacting to
710 real-time or interactive events by allowing a low priority process to
711 be preempted even if it is in kernel mode executing a system call.
712 This allows applications to run more reliably even when the system is
715 Say Y here if you are building a kernel for a desktop, embedded
716 or real-time system. Say N if you are unsure.
719 bool "Dynamic tick timer"
720 depends on !GENERIC_CLOCKEVENTS
722 Select this option if you want to disable continuous timer ticks
723 and have them programmed to occur as required. This option saves
724 power as the system can remain in idle state for longer.
726 By default dynamic tick is disabled during the boot, and can be
727 manually enabled with:
729 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
731 Alternatively, if you want dynamic tick automatically enabled
732 during boot, pass "dyntick=enable" via the kernel command string.
734 Please note that dynamic tick may affect the accuracy of
735 timekeeping on some platforms depending on the implementation.
736 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
737 to have accurate timekeeping with dynamic tick.
741 default 128 if ARCH_L7200
742 default 200 if ARCH_EBSA110 || ARCH_S3C2410
743 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
744 default AT91_TIMER_HZ if ARCH_AT91
748 bool "Use the ARM EABI to compile the kernel"
750 This option allows for the kernel to be compiled using the latest
751 ARM ABI (aka EABI). This is only useful if you are using a user
752 space environment that is also compiled with EABI.
754 Since there are major incompatibilities between the legacy ABI and
755 EABI, especially with regard to structure member alignment, this
756 option also changes the kernel syscall calling convention to
757 disambiguate both ABIs and allow for backward compatibility support
758 (selected with CONFIG_OABI_COMPAT).
760 To use this you need GCC version 4.0.0 or later.
763 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
764 depends on AEABI && EXPERIMENTAL
767 This option preserves the old syscall interface along with the
768 new (ARM EABI) one. It also provides a compatibility layer to
769 intercept syscalls that have structure arguments which layout
770 in memory differs between the legacy ABI and the new ARM EABI
771 (only for non "thumb" binaries). This option adds a tiny
772 overhead to all syscalls and produces a slightly larger kernel.
773 If you know you'll be using only pure EABI user space then you
774 can say N here. If this option is not selected and you attempt
775 to execute a legacy ABI binary then the result will be
776 UNPREDICTABLE (in fact it can be predicted that it won't work
777 at all). If in doubt say Y.
779 config ARCH_DISCONTIGMEM_ENABLE
781 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
783 Say Y to support efficient handling of discontiguous physical memory,
784 for architectures which are either NUMA (Non-Uniform Memory Access)
785 or have huge holes in the physical address space for other reasons.
786 See <file:Documentation/vm/numa> for more.
788 config ARCH_SPARSEMEM_ENABLE
791 config ARCH_SELECT_MEMORY_MODEL
796 default "4" if ARCH_LH7A40X
798 depends on NEED_MULTIPLE_NODES
803 bool "Timer and CPU usage LEDs"
804 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
805 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
806 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
807 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
808 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
809 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
810 ARCH_KS8695 || MACH_RD88F5182
812 If you say Y here, the LEDs on your machine will be used
813 to provide useful information about your current system status.
815 If you are compiling a kernel for a NetWinder or EBSA-285, you will
816 be able to select which LEDs are active using the options below. If
817 you are compiling a kernel for the EBSA-110 or the LART however, the
818 red LED will simply flash regularly to indicate that the system is
819 still functional. It is safe to say Y here if you have a CATS
820 system, but the driver will do nothing.
823 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
824 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
825 || MACH_OMAP_PERSEUS2
827 depends on !GENERIC_CLOCKEVENTS
828 default y if ARCH_EBSA110
830 If you say Y here, one of the system LEDs (the green one on the
831 NetWinder, the amber one on the EBSA285, or the red one on the LART)
832 will flash regularly to indicate that the system is still
833 operational. This is mainly useful to kernel hackers who are
834 debugging unstable kernels.
836 The LART uses the same LED for both Timer LED and CPU usage LED
837 functions. You may choose to use both, but the Timer LED function
838 will overrule the CPU usage LED.
841 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
843 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
844 || MACH_OMAP_PERSEUS2
847 If you say Y here, the red LED will be used to give a good real
848 time indication of CPU usage, by lighting whenever the idle task
849 is not currently executing.
851 The LART uses the same LED for both Timer LED and CPU usage LED
852 functions. You may choose to use both, but the Timer LED function
853 will overrule the CPU usage LED.
855 config ALIGNMENT_TRAP
857 depends on CPU_CP15_MMU
858 default y if !ARCH_EBSA110
860 ARM processors cannot fetch/store information which is not
861 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
862 address divisible by 4. On 32-bit ARM processors, these non-aligned
863 fetch/store instructions will be emulated in software if you say
864 here, which has a severe performance impact. This is necessary for
865 correct operation of some network protocols. With an IP-only
866 configuration it is safe to say N, otherwise say Y.
872 # Compressed boot loader in ROM. Yes, we really want to ask about
873 # TEXT and BSS so we preserve their values in the config files.
874 config ZBOOT_ROM_TEXT
875 hex "Compressed ROM boot loader base address"
878 The physical address at which the ROM-able zImage is to be
879 placed in the target. Platforms which normally make use of
880 ROM-able zImage formats normally set this to a suitable
881 value in their defconfig file.
883 If ZBOOT_ROM is not enabled, this has no effect.
886 hex "Compressed ROM boot loader BSS address"
889 The base address of an area of read/write memory in the target
890 for the ROM-able zImage which must be available while the
891 decompressor is running. It must be large enough to hold the
892 entire decompressed kernel plus an additional 128 KiB.
893 Platforms which normally make use of ROM-able zImage formats
894 normally set this to a suitable value in their defconfig file.
896 If ZBOOT_ROM is not enabled, this has no effect.
899 bool "Compressed boot loader in ROM/flash"
900 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
902 Say Y here if you intend to execute your compressed kernel image
903 (zImage) directly from ROM or flash. If unsure, say N.
906 string "Default kernel command string"
909 On some architectures (EBSA110 and CATS), there is currently no way
910 for the boot loader to pass arguments to the kernel. For these
911 architectures, you should supply some command-line options at build
912 time by entering them here. As a minimum, you should specify the
913 memory size and the root device (e.g., mem=64M root=/dev/nfs).
916 bool "Kernel Execute-In-Place from ROM"
917 depends on !ZBOOT_ROM
919 Execute-In-Place allows the kernel to run from non-volatile storage
920 directly addressable by the CPU, such as NOR flash. This saves RAM
921 space since the text section of the kernel is not loaded from flash
922 to RAM. Read-write sections, such as the data section and stack,
923 are still copied to RAM. The XIP kernel is not compressed since
924 it has to run directly from flash, so it will take more space to
925 store it. The flash address used to link the kernel object files,
926 and for storing it, is configuration dependent. Therefore, if you
927 say Y here, you must know the proper physical address where to
928 store the kernel image depending on your own flash memory usage.
930 Also note that the make target becomes "make xipImage" rather than
931 "make zImage" or "make Image". The final kernel binary to put in
932 ROM memory will be arch/arm/boot/xipImage.
937 hex "XIP Kernel Physical Location"
938 depends on XIP_KERNEL
941 This is the physical address in your flash memory the kernel will
942 be linked for and stored to. This address is dependent on your
946 bool "Kexec system call (EXPERIMENTAL)"
947 depends on EXPERIMENTAL
949 kexec is a system call that implements the ability to shutdown your
950 current kernel, and to start another kernel. It is like a reboot
951 but it is independent of the system firmware. And like a reboot
952 you can start any kernel with it, not just Linux.
954 It is an ongoing process to be certain the hardware in a machine
955 is properly shutdown, so do not be surprised if this code does not
956 initially work for you. It may help to enable device hotplugging
960 bool "Export atags in procfs"
964 Should the atags used to boot the kernel be exported in an "atags"
965 file in procfs. Useful with kexec.
969 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
971 menu "CPU Frequency scaling"
973 source "drivers/cpufreq/Kconfig"
975 config CPU_FREQ_SA1100
977 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
980 config CPU_FREQ_SA1110
982 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
985 config CPU_FREQ_INTEGRATOR
986 tristate "CPUfreq driver for ARM Integrator CPUs"
987 depends on ARCH_INTEGRATOR && CPU_FREQ
990 This enables the CPUfreq driver for ARM Integrator CPUs.
992 For details, take a look at <file:Documentation/cpu-freq>.
997 tristate "CPUfreq driver for i.MX CPUs"
998 depends on ARCH_IMX && CPU_FREQ
1001 This enables the CPUfreq driver for i.MX CPUs.
1007 depends on CPU_FREQ && ARCH_PXA && PXA25x
1009 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1015 menu "Floating point emulation"
1017 comment "At least one emulation must be selected"
1020 bool "NWFPE math emulation"
1021 depends on !AEABI || OABI_COMPAT
1023 Say Y to include the NWFPE floating point emulator in the kernel.
1024 This is necessary to run most binaries. Linux does not currently
1025 support floating point hardware so you need to say Y here even if
1026 your machine has an FPA or floating point co-processor podule.
1028 You may say N here if you are going to load the Acorn FPEmulator
1029 early in the bootup.
1032 bool "Support extended precision"
1033 depends on FPE_NWFPE
1035 Say Y to include 80-bit support in the kernel floating-point
1036 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1037 Note that gcc does not generate 80-bit operations by default,
1038 so in most cases this option only enlarges the size of the
1039 floating point emulator without any good reason.
1041 You almost surely want to say N here.
1044 bool "FastFPE math emulation (EXPERIMENTAL)"
1045 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1047 Say Y here to include the FAST floating point emulator in the kernel.
1048 This is an experimental much faster emulator which now also has full
1049 precision for the mantissa. It does not support any exceptions.
1050 It is very simple, and approximately 3-6 times faster than NWFPE.
1052 It should be sufficient for most programs. It may be not suitable
1053 for scientific calculations, but you have to check this for yourself.
1054 If you do not feel you need a faster FP emulation you should better
1058 bool "VFP-format floating point maths"
1059 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1061 Say Y to include VFP support code in the kernel. This is needed
1062 if your hardware includes a VFP unit.
1064 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1065 release notes and additional status information.
1067 Say N if your target does not have VFP hardware.
1075 bool "Advanced SIMD (NEON) Extension support"
1076 depends on VFPv3 && CPU_V7
1078 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1083 menu "Userspace binary formats"
1085 source "fs/Kconfig.binfmt"
1088 tristate "RISC OS personality"
1091 Say Y here to include the kernel code necessary if you want to run
1092 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1093 experimental; if this sounds frightening, say N and sleep in peace.
1094 You can also say M here to compile this support as a module (which
1095 will be called arthur).
1099 menu "Power management options"
1101 source "kernel/power/Kconfig"
1103 config ARCH_SUSPEND_POSSIBLE
1108 source "net/Kconfig"
1110 menu "Device Drivers"
1112 source "drivers/base/Kconfig"
1114 source "drivers/connector/Kconfig"
1116 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1117 source "drivers/mtd/Kconfig"
1120 source "drivers/parport/Kconfig"
1122 source "drivers/pnp/Kconfig"
1124 source "drivers/block/Kconfig"
1126 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1128 source "drivers/misc/Kconfig"
1130 source "drivers/ide/Kconfig"
1132 source "drivers/scsi/Kconfig"
1134 source "drivers/ata/Kconfig"
1136 source "drivers/md/Kconfig"
1138 source "drivers/message/fusion/Kconfig"
1140 source "drivers/ieee1394/Kconfig"
1142 source "drivers/message/i2o/Kconfig"
1144 source "drivers/net/Kconfig"
1146 source "drivers/isdn/Kconfig"
1148 # input before char - char/joystick depends on it. As does USB.
1150 source "drivers/input/Kconfig"
1152 source "drivers/char/Kconfig"
1154 source "drivers/i2c/Kconfig"
1156 source "drivers/spi/Kconfig"
1158 source "drivers/gpio/Kconfig"
1160 source "drivers/w1/Kconfig"
1162 source "drivers/power/Kconfig"
1164 source "drivers/hwmon/Kconfig"
1166 source "drivers/watchdog/Kconfig"
1168 source "drivers/ssb/Kconfig"
1170 #source "drivers/l3/Kconfig"
1172 source "drivers/mfd/Kconfig"
1174 source "drivers/media/Kconfig"
1176 source "drivers/video/Kconfig"
1178 source "sound/Kconfig"
1180 source "drivers/hid/Kconfig"
1182 source "drivers/usb/Kconfig"
1184 source "drivers/mmc/Kconfig"
1186 source "drivers/leds/Kconfig"
1188 source "drivers/rtc/Kconfig"
1190 source "drivers/dma/Kconfig"
1192 source "drivers/dca/Kconfig"
1198 source "arch/arm/Kconfig.debug"
1200 source "security/Kconfig"
1202 source "crypto/Kconfig"
1204 source "lib/Kconfig"