2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
6 mainmenu "Linux Kernel Configuration"
13 select SYS_SUPPORTS_APM_EMULATION
15 select HAVE_KPROBES if (!XIP_KERNEL)
16 select HAVE_KRETPROBES if (HAVE_KPROBES)
18 The ARM series is a line of low-power-consumption RISC chip designs
19 licensed by ARM Ltd and targeted at embedded applications and
20 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
21 manufactured, but legacy ARM-based PC hardware remains popular in
22 Europe. There is an ARM Linux project with a web page at
23 <http://www.arm.linux.org.uk/>.
25 config SYS_SUPPORTS_APM_EMULATION
36 config GENERIC_CLOCKEVENTS
40 config GENERIC_CLOCKEVENTS_BROADCAST
42 depends on GENERIC_CLOCKEVENTS
43 default y if SMP && !LOCAL_TIMERS
56 The Extended Industry Standard Architecture (EISA) bus was
57 developed as an open alternative to the IBM MicroChannel bus.
59 The EISA bus provided some of the features of the IBM MicroChannel
60 bus while maintaining backward compatibility with cards made for
61 the older ISA bus. The EISA bus saw limited use between 1988 and
62 1995 when it was made obsolete by the PCI bus.
64 Say Y here if you are building a kernel for an EISA-based machine.
74 MicroChannel Architecture is found in some IBM PS/2 machines and
75 laptops. It is a bus system similar to PCI or ISA. See
76 <file:Documentation/mca.txt> (and especially the web page given
77 there) before attempting to build an MCA bus kernel.
79 config GENERIC_HARDIRQS
83 config STACKTRACE_SUPPORT
87 config HAVE_LATENCYTOP_SUPPORT
92 config LOCKDEP_SUPPORT
96 config TRACE_IRQFLAGS_SUPPORT
100 config HARDIRQS_SW_RESEND
104 config GENERIC_IRQ_PROBE
108 config GENERIC_LOCKBREAK
111 depends on SMP && PREEMPT
113 config RWSEM_GENERIC_SPINLOCK
117 config RWSEM_XCHGADD_ALGORITHM
120 config ARCH_HAS_ILOG2_U32
124 config ARCH_HAS_ILOG2_U64
128 config GENERIC_HWEIGHT
132 config GENERIC_CALIBRATE_DELAY
136 config ARCH_SUPPORTS_AOUT
139 config ARCH_MAY_HAVE_PC_FDC
146 config GENERIC_ISA_DMA
157 config OPROFILE_ARMV6
159 depends on CPU_V6 && !SMP
160 select OPROFILE_ARM11_CORE
162 config OPROFILE_MPCORE
164 depends on CPU_V6 && SMP
165 select OPROFILE_ARM11_CORE
167 config OPROFILE_ARM11_CORE
174 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
175 default DRAM_BASE if REMAP_VECTORS_TO_RAM
178 The base address of exception vectors.
180 source "init/Kconfig"
185 prompt "ARM system type"
186 default ARCH_VERSATILE
189 bool "Agilent AAEC-2000 based"
192 This enables support for systems based on the Agilent AAEC-2000
194 config ARCH_INTEGRATOR
195 bool "ARM Ltd. Integrator family"
199 Support for ARM's Integrator platform.
202 bool "ARM Ltd. RealView family"
206 select GENERIC_CLOCKEVENTS
208 This enables support for ARM Ltd RealView boards.
210 config ARCH_VERSATILE
211 bool "ARM Ltd. Versatile family"
216 select GENERIC_CLOCKEVENTS
218 This enables support for ARM Ltd Versatile board.
224 This enables support for systems based on the Atmel AT91RM9200,
225 AT91SAM9 and AT91CAP9 processors.
228 bool "Cirrus CL-PS7500FE"
233 Support for the Cirrus Logic PS7500FE system-on-a-chip.
236 bool "Cirrus Logic CLPS711x/EP721x-based"
238 Support for Cirrus Logic 711x/721x based boards.
243 select FOOTBRIDGE_ADDIN
245 Support for Intel's EBSA285 companion chip.
252 This is an evaluation board for the StrongARM processor available
253 from Digital. It has limited hardware on-board, including an
254 Ethernet interface, two PCMCIA sockets, two serial ports and a
264 This enables support for the Cirrus EP93xx series of CPUs.
266 config ARCH_FOOTBRIDGE
270 Support for systems based on the DC21285 companion chip
271 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
274 bool "Hilscher NetX based"
277 This enables support for systems based on the Hilscher NetX Soc
280 bool "Hynix HMS720x-based"
283 This enables support for systems based on the Hynix HMS720x
289 select GENERIC_CLOCKEVENTS
291 Support for Motorola's i.MX family of processors (MX1, MXL).
298 select ARCH_SUPPORTS_MSI
300 Support for Intel's IOP13XX (XScale) family of processors.
308 Support for Intel's 80219 and IOP32X (XScale) family of
317 Support for Intel's IOP33X (XScale) family of processors.
324 Support for Intel's IXP23xx (XScale) family of processors.
327 bool "IXP2400/2800-based"
331 Support for Intel's IXP2400/2800 (XScale) family of processors.
338 select GENERIC_CLOCKEVENTS
340 Support for Intel's IXP4XX (XScale) family of processors.
346 Say Y here if you intend to run this kernel on a LinkUp Systems
347 L7200 Software Development Board which uses an ARM720T processor.
348 Information on this board can be obtained at:
350 <http://www.linkupsys.com/>
352 If you have any questions or comments about the Linux kernel port
353 to this board, send e-mail to <sjhill@cotw.com>.
356 bool "Micrel/Kendin KS8695"
359 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
360 System-on-Chip devices.
363 bool "NetSilicon NS9xxx"
366 select GENERIC_CLOCKEVENTS
368 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
371 <http://www.digi.com/products/microprocessors/index.jsp>
374 bool "Marvell Loki (88RC8480)"
376 select GENERIC_CLOCKEVENTS
379 Support for the Marvell Loki (88RC8480) SoC.
382 bool "Freescale MXC/iMX-based"
385 Support for Freescale MXC/iMX-based family of processors
393 select GENERIC_CLOCKEVENTS
396 Support for the following Marvell Orion 5x series SoCs:
397 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
401 bool "Philips Nexperia PNX4008 Mobile"
403 This enables support for Philips PNX4008 mobile platform.
406 bool "PXA2xx/PXA3xx-based"
412 select GENERIC_CLOCKEVENTS
415 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
422 select ARCH_MAY_HAVE_PC_FDC
426 On the Acorn Risc-PC, Linux can support the internal IDE disk and
427 CD-ROM interface, serial and parallel port, and the floppy drive.
432 select ARCH_DISCONTIGMEM_ENABLE
433 select ARCH_SPARSEMEM_ENABLE
434 select ARCH_SELECT_MEMORY_MODEL
438 select GENERIC_CLOCKEVENTS
442 Support for StrongARM 11x0 based boards.
445 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
448 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
449 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
450 the Samsung SMDK2410 development board (and derivatives).
458 Support for the StrongARM based Digital DNARD machine, also known
459 as "Shark" (<http://www.shark-linux.de/shark.html>).
464 Say Y here for systems based on one of the Sharp LH7A40X
465 System on a Chip processors. These CPUs include an ARM922T
466 core with a wide array of integrated devices for
467 hand-held and low-power applications.
472 select GENERIC_CLOCKEVENTS
475 Support for TI's DaVinci platform.
482 select GENERIC_CLOCKEVENTS
484 Support for TI's OMAP platform (OMAP1 and OMAP2).
487 bool "Qualcomm MSM7X00A"
489 select GENERIC_CLOCKEVENTS
491 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
492 apps processor of the MSM7X00A and depends on a shared memory
493 interface to the ARM9 modem processor which runs the baseband stack
494 and controls some vital subsystems (clock and power control, etc).
495 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
499 source "arch/arm/mach-clps711x/Kconfig"
501 source "arch/arm/mach-ep93xx/Kconfig"
503 source "arch/arm/mach-footbridge/Kconfig"
505 source "arch/arm/mach-integrator/Kconfig"
507 source "arch/arm/mach-iop32x/Kconfig"
509 source "arch/arm/mach-iop33x/Kconfig"
511 source "arch/arm/mach-iop13xx/Kconfig"
513 source "arch/arm/mach-ixp4xx/Kconfig"
515 source "arch/arm/mach-ixp2000/Kconfig"
517 source "arch/arm/mach-ixp23xx/Kconfig"
519 source "arch/arm/mach-loki/Kconfig"
521 source "arch/arm/mach-pxa/Kconfig"
523 source "arch/arm/mach-sa1100/Kconfig"
525 source "arch/arm/plat-omap/Kconfig"
527 source "arch/arm/mach-omap1/Kconfig"
529 source "arch/arm/mach-omap2/Kconfig"
531 source "arch/arm/mach-orion5x/Kconfig"
533 source "arch/arm/plat-s3c24xx/Kconfig"
534 source "arch/arm/plat-s3c/Kconfig"
537 source "arch/arm/mach-s3c2400/Kconfig"
538 source "arch/arm/mach-s3c2410/Kconfig"
539 source "arch/arm/mach-s3c2412/Kconfig"
540 source "arch/arm/mach-s3c2440/Kconfig"
541 source "arch/arm/mach-s3c2442/Kconfig"
542 source "arch/arm/mach-s3c2443/Kconfig"
545 source "arch/arm/mach-lh7a40x/Kconfig"
547 source "arch/arm/mach-imx/Kconfig"
549 source "arch/arm/mach-h720x/Kconfig"
551 source "arch/arm/mach-versatile/Kconfig"
553 source "arch/arm/mach-aaec2000/Kconfig"
555 source "arch/arm/mach-realview/Kconfig"
557 source "arch/arm/mach-at91/Kconfig"
559 source "arch/arm/plat-mxc/Kconfig"
561 source "arch/arm/mach-netx/Kconfig"
563 source "arch/arm/mach-ns9xxx/Kconfig"
565 source "arch/arm/mach-davinci/Kconfig"
567 source "arch/arm/mach-ks8695/Kconfig"
569 source "arch/arm/mach-msm/Kconfig"
571 # Definitions to make life easier
581 source arch/arm/mm/Kconfig
584 bool "Enable iWMMXt support"
585 depends on CPU_XSCALE || CPU_XSC3
586 default y if PXA27x || PXA3xx
588 Enable support for iWMMXt context switching at run time if
589 running on a CPU that supports it.
591 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
594 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
598 source "arch/arm/Kconfig-nommu"
603 source "arch/arm/common/Kconfig"
605 config FORCE_MAX_ZONEORDER
618 Find out whether you have ISA slots on your motherboard. ISA is the
619 name of a bus system, i.e. the way the CPU talks to the other stuff
620 inside your box. Other bus systems are PCI, EISA, MicroChannel
621 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
622 newer boards don't support it. If you have ISA, say Y, otherwise N.
624 # Select ISA DMA controller support
629 # Select ISA DMA interface
634 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
636 Find out whether you have a PCI motherboard. PCI is the name of a
637 bus system, i.e. the way the CPU talks to the other stuff inside
638 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
639 VESA. If you have PCI, say Y, otherwise N.
644 # Select the host bridge type
645 config PCI_HOST_VIA82C505
647 depends on PCI && ARCH_SHARK
650 config PCI_HOST_ITE8152
652 depends on PCI && MACH_ARMCORE
656 source "drivers/pci/Kconfig"
658 source "drivers/pcmcia/Kconfig"
662 menu "Kernel Features"
664 source "kernel/time/Kconfig"
667 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
668 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
670 This enables support for systems with more than one CPU. If you have
671 a system with only one CPU, like most personal computers, say N. If
672 you have a system with more than one CPU, say Y.
674 If you say N here, the kernel will run on single and multiprocessor
675 machines, but will use only one CPU of a multiprocessor machine. If
676 you say Y here, the kernel will run on many, but not all, single
677 processor machines. On a single processor machine, the kernel will
678 run faster if you say N here.
680 See also <file:Documentation/i386/IO-APIC.txt>,
681 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
682 <http://www.linuxdoc.org/docs.html#howto>.
684 If you don't know what to do here, say N.
687 int "Maximum number of CPUs (2-32)"
693 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
694 depends on SMP && HOTPLUG && EXPERIMENTAL
696 Say Y here to experiment with turning CPUs off and on. CPUs
697 can be controlled through /sys/devices/system/cpu.
700 bool "Use local timer interrupts"
701 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
704 Enable support for local timers on SMP platforms, rather then the
705 legacy IPI broadcast method. Local timers allows the system
706 accounting to be spread across the timer interval, preventing a
707 "thundering herd" at every timer tick.
710 bool "Preemptible Kernel (EXPERIMENTAL)"
711 depends on EXPERIMENTAL
713 This option reduces the latency of the kernel when reacting to
714 real-time or interactive events by allowing a low priority process to
715 be preempted even if it is in kernel mode executing a system call.
716 This allows applications to run more reliably even when the system is
719 Say Y here if you are building a kernel for a desktop, embedded
720 or real-time system. Say N if you are unsure.
723 bool "Dynamic tick timer"
724 depends on !GENERIC_CLOCKEVENTS
726 Select this option if you want to disable continuous timer ticks
727 and have them programmed to occur as required. This option saves
728 power as the system can remain in idle state for longer.
730 By default dynamic tick is disabled during the boot, and can be
731 manually enabled with:
733 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
735 Alternatively, if you want dynamic tick automatically enabled
736 during boot, pass "dyntick=enable" via the kernel command string.
738 Please note that dynamic tick may affect the accuracy of
739 timekeeping on some platforms depending on the implementation.
740 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
741 to have accurate timekeeping with dynamic tick.
745 default 128 if ARCH_L7200
746 default 200 if ARCH_EBSA110 || ARCH_S3C2410
747 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
748 default AT91_TIMER_HZ if ARCH_AT91
752 bool "Use the ARM EABI to compile the kernel"
754 This option allows for the kernel to be compiled using the latest
755 ARM ABI (aka EABI). This is only useful if you are using a user
756 space environment that is also compiled with EABI.
758 Since there are major incompatibilities between the legacy ABI and
759 EABI, especially with regard to structure member alignment, this
760 option also changes the kernel syscall calling convention to
761 disambiguate both ABIs and allow for backward compatibility support
762 (selected with CONFIG_OABI_COMPAT).
764 To use this you need GCC version 4.0.0 or later.
767 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
768 depends on AEABI && EXPERIMENTAL
771 This option preserves the old syscall interface along with the
772 new (ARM EABI) one. It also provides a compatibility layer to
773 intercept syscalls that have structure arguments which layout
774 in memory differs between the legacy ABI and the new ARM EABI
775 (only for non "thumb" binaries). This option adds a tiny
776 overhead to all syscalls and produces a slightly larger kernel.
777 If you know you'll be using only pure EABI user space then you
778 can say N here. If this option is not selected and you attempt
779 to execute a legacy ABI binary then the result will be
780 UNPREDICTABLE (in fact it can be predicted that it won't work
781 at all). If in doubt say Y.
783 config ARCH_DISCONTIGMEM_ENABLE
785 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
787 Say Y to support efficient handling of discontiguous physical memory,
788 for architectures which are either NUMA (Non-Uniform Memory Access)
789 or have huge holes in the physical address space for other reasons.
790 See <file:Documentation/vm/numa> for more.
792 config ARCH_SPARSEMEM_ENABLE
795 config ARCH_SELECT_MEMORY_MODEL
800 default "4" if ARCH_LH7A40X
802 depends on NEED_MULTIPLE_NODES
807 bool "Timer and CPU usage LEDs"
808 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
809 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
810 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
811 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
812 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
813 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
814 ARCH_KS8695 || MACH_RD88F5182
816 If you say Y here, the LEDs on your machine will be used
817 to provide useful information about your current system status.
819 If you are compiling a kernel for a NetWinder or EBSA-285, you will
820 be able to select which LEDs are active using the options below. If
821 you are compiling a kernel for the EBSA-110 or the LART however, the
822 red LED will simply flash regularly to indicate that the system is
823 still functional. It is safe to say Y here if you have a CATS
824 system, but the driver will do nothing.
827 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
828 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
829 || MACH_OMAP_PERSEUS2
831 depends on !GENERIC_CLOCKEVENTS
832 default y if ARCH_EBSA110
834 If you say Y here, one of the system LEDs (the green one on the
835 NetWinder, the amber one on the EBSA285, or the red one on the LART)
836 will flash regularly to indicate that the system is still
837 operational. This is mainly useful to kernel hackers who are
838 debugging unstable kernels.
840 The LART uses the same LED for both Timer LED and CPU usage LED
841 functions. You may choose to use both, but the Timer LED function
842 will overrule the CPU usage LED.
845 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
847 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
848 || MACH_OMAP_PERSEUS2
851 If you say Y here, the red LED will be used to give a good real
852 time indication of CPU usage, by lighting whenever the idle task
853 is not currently executing.
855 The LART uses the same LED for both Timer LED and CPU usage LED
856 functions. You may choose to use both, but the Timer LED function
857 will overrule the CPU usage LED.
859 config ALIGNMENT_TRAP
861 depends on CPU_CP15_MMU
862 default y if !ARCH_EBSA110
864 ARM processors cannot fetch/store information which is not
865 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
866 address divisible by 4. On 32-bit ARM processors, these non-aligned
867 fetch/store instructions will be emulated in software if you say
868 here, which has a severe performance impact. This is necessary for
869 correct operation of some network protocols. With an IP-only
870 configuration it is safe to say N, otherwise say Y.
876 # Compressed boot loader in ROM. Yes, we really want to ask about
877 # TEXT and BSS so we preserve their values in the config files.
878 config ZBOOT_ROM_TEXT
879 hex "Compressed ROM boot loader base address"
882 The physical address at which the ROM-able zImage is to be
883 placed in the target. Platforms which normally make use of
884 ROM-able zImage formats normally set this to a suitable
885 value in their defconfig file.
887 If ZBOOT_ROM is not enabled, this has no effect.
890 hex "Compressed ROM boot loader BSS address"
893 The base address of an area of read/write memory in the target
894 for the ROM-able zImage which must be available while the
895 decompressor is running. It must be large enough to hold the
896 entire decompressed kernel plus an additional 128 KiB.
897 Platforms which normally make use of ROM-able zImage formats
898 normally set this to a suitable value in their defconfig file.
900 If ZBOOT_ROM is not enabled, this has no effect.
903 bool "Compressed boot loader in ROM/flash"
904 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
906 Say Y here if you intend to execute your compressed kernel image
907 (zImage) directly from ROM or flash. If unsure, say N.
910 string "Default kernel command string"
913 On some architectures (EBSA110 and CATS), there is currently no way
914 for the boot loader to pass arguments to the kernel. For these
915 architectures, you should supply some command-line options at build
916 time by entering them here. As a minimum, you should specify the
917 memory size and the root device (e.g., mem=64M root=/dev/nfs).
920 bool "Kernel Execute-In-Place from ROM"
921 depends on !ZBOOT_ROM
923 Execute-In-Place allows the kernel to run from non-volatile storage
924 directly addressable by the CPU, such as NOR flash. This saves RAM
925 space since the text section of the kernel is not loaded from flash
926 to RAM. Read-write sections, such as the data section and stack,
927 are still copied to RAM. The XIP kernel is not compressed since
928 it has to run directly from flash, so it will take more space to
929 store it. The flash address used to link the kernel object files,
930 and for storing it, is configuration dependent. Therefore, if you
931 say Y here, you must know the proper physical address where to
932 store the kernel image depending on your own flash memory usage.
934 Also note that the make target becomes "make xipImage" rather than
935 "make zImage" or "make Image". The final kernel binary to put in
936 ROM memory will be arch/arm/boot/xipImage.
941 hex "XIP Kernel Physical Location"
942 depends on XIP_KERNEL
945 This is the physical address in your flash memory the kernel will
946 be linked for and stored to. This address is dependent on your
950 bool "Kexec system call (EXPERIMENTAL)"
951 depends on EXPERIMENTAL
953 kexec is a system call that implements the ability to shutdown your
954 current kernel, and to start another kernel. It is like a reboot
955 but it is independent of the system firmware. And like a reboot
956 you can start any kernel with it, not just Linux.
958 It is an ongoing process to be certain the hardware in a machine
959 is properly shutdown, so do not be surprised if this code does not
960 initially work for you. It may help to enable device hotplugging
964 bool "Export atags in procfs"
968 Should the atags used to boot the kernel be exported in an "atags"
969 file in procfs. Useful with kexec.
973 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
975 menu "CPU Frequency scaling"
977 source "drivers/cpufreq/Kconfig"
979 config CPU_FREQ_SA1100
981 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
984 config CPU_FREQ_SA1110
986 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
989 config CPU_FREQ_INTEGRATOR
990 tristate "CPUfreq driver for ARM Integrator CPUs"
991 depends on ARCH_INTEGRATOR && CPU_FREQ
994 This enables the CPUfreq driver for ARM Integrator CPUs.
996 For details, take a look at <file:Documentation/cpu-freq>.
1001 tristate "CPUfreq driver for i.MX CPUs"
1002 depends on ARCH_IMX && CPU_FREQ
1005 This enables the CPUfreq driver for i.MX CPUs.
1011 depends on CPU_FREQ && ARCH_PXA && PXA25x
1013 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1019 menu "Floating point emulation"
1021 comment "At least one emulation must be selected"
1024 bool "NWFPE math emulation"
1025 depends on !AEABI || OABI_COMPAT
1027 Say Y to include the NWFPE floating point emulator in the kernel.
1028 This is necessary to run most binaries. Linux does not currently
1029 support floating point hardware so you need to say Y here even if
1030 your machine has an FPA or floating point co-processor podule.
1032 You may say N here if you are going to load the Acorn FPEmulator
1033 early in the bootup.
1036 bool "Support extended precision"
1037 depends on FPE_NWFPE
1039 Say Y to include 80-bit support in the kernel floating-point
1040 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1041 Note that gcc does not generate 80-bit operations by default,
1042 so in most cases this option only enlarges the size of the
1043 floating point emulator without any good reason.
1045 You almost surely want to say N here.
1048 bool "FastFPE math emulation (EXPERIMENTAL)"
1049 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1051 Say Y here to include the FAST floating point emulator in the kernel.
1052 This is an experimental much faster emulator which now also has full
1053 precision for the mantissa. It does not support any exceptions.
1054 It is very simple, and approximately 3-6 times faster than NWFPE.
1056 It should be sufficient for most programs. It may be not suitable
1057 for scientific calculations, but you have to check this for yourself.
1058 If you do not feel you need a faster FP emulation you should better
1062 bool "VFP-format floating point maths"
1063 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1065 Say Y to include VFP support code in the kernel. This is needed
1066 if your hardware includes a VFP unit.
1068 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1069 release notes and additional status information.
1071 Say N if your target does not have VFP hardware.
1079 bool "Advanced SIMD (NEON) Extension support"
1080 depends on VFPv3 && CPU_V7
1082 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1087 menu "Userspace binary formats"
1089 source "fs/Kconfig.binfmt"
1092 tristate "RISC OS personality"
1095 Say Y here to include the kernel code necessary if you want to run
1096 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1097 experimental; if this sounds frightening, say N and sleep in peace.
1098 You can also say M here to compile this support as a module (which
1099 will be called arthur).
1103 menu "Power management options"
1105 source "kernel/power/Kconfig"
1107 config ARCH_SUSPEND_POSSIBLE
1112 source "net/Kconfig"
1114 menu "Device Drivers"
1116 source "drivers/base/Kconfig"
1118 source "drivers/connector/Kconfig"
1120 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1121 source "drivers/mtd/Kconfig"
1124 source "drivers/parport/Kconfig"
1126 source "drivers/pnp/Kconfig"
1128 source "drivers/block/Kconfig"
1130 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1132 source "drivers/misc/Kconfig"
1134 source "drivers/ide/Kconfig"
1136 source "drivers/scsi/Kconfig"
1138 source "drivers/ata/Kconfig"
1140 source "drivers/md/Kconfig"
1142 source "drivers/message/fusion/Kconfig"
1144 source "drivers/ieee1394/Kconfig"
1146 source "drivers/message/i2o/Kconfig"
1148 source "drivers/net/Kconfig"
1150 source "drivers/isdn/Kconfig"
1152 # input before char - char/joystick depends on it. As does USB.
1154 source "drivers/input/Kconfig"
1156 source "drivers/char/Kconfig"
1158 source "drivers/i2c/Kconfig"
1160 source "drivers/spi/Kconfig"
1162 source "drivers/gpio/Kconfig"
1164 source "drivers/w1/Kconfig"
1166 source "drivers/power/Kconfig"
1168 source "drivers/hwmon/Kconfig"
1170 source "drivers/watchdog/Kconfig"
1172 source "drivers/ssb/Kconfig"
1174 #source "drivers/l3/Kconfig"
1176 source "drivers/mfd/Kconfig"
1178 source "drivers/media/Kconfig"
1180 source "drivers/video/Kconfig"
1182 source "sound/Kconfig"
1184 source "drivers/hid/Kconfig"
1186 source "drivers/usb/Kconfig"
1188 source "drivers/mmc/Kconfig"
1190 source "drivers/leds/Kconfig"
1192 source "drivers/rtc/Kconfig"
1194 source "drivers/dma/Kconfig"
1196 source "drivers/dca/Kconfig"
1198 source "drivers/uio/Kconfig"
1204 source "arch/arm/Kconfig.debug"
1206 source "security/Kconfig"
1208 source "crypto/Kconfig"
1210 source "lib/Kconfig"