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 "Marvell Kirkwood"
359 select GENERIC_CLOCKEVENTS
362 Support for the following Marvell Kirkwood series SoCs:
363 88F6180, 88F6192 and 88F6281.
366 bool "Micrel/Kendin KS8695"
369 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
370 System-on-Chip devices.
373 bool "NetSilicon NS9xxx"
376 select GENERIC_CLOCKEVENTS
378 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
381 <http://www.digi.com/products/microprocessors/index.jsp>
384 bool "Marvell Loki (88RC8480)"
386 select GENERIC_CLOCKEVENTS
389 Support for the Marvell Loki (88RC8480) SoC.
392 bool "Freescale MXC/iMX-based"
395 Support for Freescale MXC/iMX-based family of processors
403 select GENERIC_CLOCKEVENTS
406 Support for the following Marvell Orion 5x series SoCs:
407 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
411 bool "Philips Nexperia PNX4008 Mobile"
413 This enables support for Philips PNX4008 mobile platform.
416 bool "PXA2xx/PXA3xx-based"
422 select GENERIC_CLOCKEVENTS
425 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
432 select ARCH_MAY_HAVE_PC_FDC
436 On the Acorn Risc-PC, Linux can support the internal IDE disk and
437 CD-ROM interface, serial and parallel port, and the floppy drive.
442 select ARCH_DISCONTIGMEM_ENABLE
443 select ARCH_SPARSEMEM_ENABLE
444 select ARCH_SELECT_MEMORY_MODEL
448 select GENERIC_CLOCKEVENTS
452 Support for StrongARM 11x0 based boards.
455 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
458 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
459 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
460 the Samsung SMDK2410 development board (and derivatives).
468 Support for the StrongARM based Digital DNARD machine, also known
469 as "Shark" (<http://www.shark-linux.de/shark.html>).
474 Say Y here for systems based on one of the Sharp LH7A40X
475 System on a Chip processors. These CPUs include an ARM922T
476 core with a wide array of integrated devices for
477 hand-held and low-power applications.
482 select GENERIC_CLOCKEVENTS
485 Support for TI's DaVinci platform.
492 select GENERIC_CLOCKEVENTS
494 Support for TI's OMAP platform (OMAP1 and OMAP2).
497 bool "Qualcomm MSM7X00A"
499 select GENERIC_CLOCKEVENTS
501 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
502 apps processor of the MSM7X00A and depends on a shared memory
503 interface to the ARM9 modem processor which runs the baseband stack
504 and controls some vital subsystems (clock and power control, etc).
505 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
509 source "arch/arm/mach-clps711x/Kconfig"
511 source "arch/arm/mach-ep93xx/Kconfig"
513 source "arch/arm/mach-footbridge/Kconfig"
515 source "arch/arm/mach-integrator/Kconfig"
517 source "arch/arm/mach-iop32x/Kconfig"
519 source "arch/arm/mach-iop33x/Kconfig"
521 source "arch/arm/mach-iop13xx/Kconfig"
523 source "arch/arm/mach-ixp4xx/Kconfig"
525 source "arch/arm/mach-ixp2000/Kconfig"
527 source "arch/arm/mach-ixp23xx/Kconfig"
529 source "arch/arm/mach-loki/Kconfig"
531 source "arch/arm/mach-pxa/Kconfig"
533 source "arch/arm/mach-sa1100/Kconfig"
535 source "arch/arm/plat-omap/Kconfig"
537 source "arch/arm/mach-omap1/Kconfig"
539 source "arch/arm/mach-omap2/Kconfig"
541 source "arch/arm/mach-orion5x/Kconfig"
543 source "arch/arm/mach-kirkwood/Kconfig"
545 source "arch/arm/plat-s3c24xx/Kconfig"
546 source "arch/arm/plat-s3c/Kconfig"
549 source "arch/arm/mach-s3c2400/Kconfig"
550 source "arch/arm/mach-s3c2410/Kconfig"
551 source "arch/arm/mach-s3c2412/Kconfig"
552 source "arch/arm/mach-s3c2440/Kconfig"
553 source "arch/arm/mach-s3c2442/Kconfig"
554 source "arch/arm/mach-s3c2443/Kconfig"
557 source "arch/arm/mach-lh7a40x/Kconfig"
559 source "arch/arm/mach-imx/Kconfig"
561 source "arch/arm/mach-h720x/Kconfig"
563 source "arch/arm/mach-versatile/Kconfig"
565 source "arch/arm/mach-aaec2000/Kconfig"
567 source "arch/arm/mach-realview/Kconfig"
569 source "arch/arm/mach-at91/Kconfig"
571 source "arch/arm/plat-mxc/Kconfig"
573 source "arch/arm/mach-netx/Kconfig"
575 source "arch/arm/mach-ns9xxx/Kconfig"
577 source "arch/arm/mach-davinci/Kconfig"
579 source "arch/arm/mach-ks8695/Kconfig"
581 source "arch/arm/mach-msm/Kconfig"
583 # Definitions to make life easier
593 source arch/arm/mm/Kconfig
596 bool "Enable iWMMXt support"
597 depends on CPU_XSCALE || CPU_XSC3
598 default y if PXA27x || PXA3xx
600 Enable support for iWMMXt context switching at run time if
601 running on a CPU that supports it.
603 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
606 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
610 source "arch/arm/Kconfig-nommu"
615 source "arch/arm/common/Kconfig"
617 config FORCE_MAX_ZONEORDER
630 Find out whether you have ISA slots on your motherboard. ISA is the
631 name of a bus system, i.e. the way the CPU talks to the other stuff
632 inside your box. Other bus systems are PCI, EISA, MicroChannel
633 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
634 newer boards don't support it. If you have ISA, say Y, otherwise N.
636 # Select ISA DMA controller support
641 # Select ISA DMA interface
646 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
648 Find out whether you have a PCI motherboard. PCI is the name of a
649 bus system, i.e. the way the CPU talks to the other stuff inside
650 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
651 VESA. If you have PCI, say Y, otherwise N.
656 # Select the host bridge type
657 config PCI_HOST_VIA82C505
659 depends on PCI && ARCH_SHARK
662 config PCI_HOST_ITE8152
664 depends on PCI && MACH_ARMCORE
668 source "drivers/pci/Kconfig"
670 source "drivers/pcmcia/Kconfig"
674 menu "Kernel Features"
676 source "kernel/time/Kconfig"
679 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
680 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
682 This enables support for systems with more than one CPU. If you have
683 a system with only one CPU, like most personal computers, say N. If
684 you have a system with more than one CPU, say Y.
686 If you say N here, the kernel will run on single and multiprocessor
687 machines, but will use only one CPU of a multiprocessor machine. If
688 you say Y here, the kernel will run on many, but not all, single
689 processor machines. On a single processor machine, the kernel will
690 run faster if you say N here.
692 See also <file:Documentation/i386/IO-APIC.txt>,
693 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
694 <http://www.linuxdoc.org/docs.html#howto>.
696 If you don't know what to do here, say N.
699 int "Maximum number of CPUs (2-32)"
705 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
706 depends on SMP && HOTPLUG && EXPERIMENTAL
708 Say Y here to experiment with turning CPUs off and on. CPUs
709 can be controlled through /sys/devices/system/cpu.
712 bool "Use local timer interrupts"
713 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
716 Enable support for local timers on SMP platforms, rather then the
717 legacy IPI broadcast method. Local timers allows the system
718 accounting to be spread across the timer interval, preventing a
719 "thundering herd" at every timer tick.
722 bool "Preemptible Kernel (EXPERIMENTAL)"
723 depends on EXPERIMENTAL
725 This option reduces the latency of the kernel when reacting to
726 real-time or interactive events by allowing a low priority process to
727 be preempted even if it is in kernel mode executing a system call.
728 This allows applications to run more reliably even when the system is
731 Say Y here if you are building a kernel for a desktop, embedded
732 or real-time system. Say N if you are unsure.
735 bool "Dynamic tick timer"
736 depends on !GENERIC_CLOCKEVENTS
738 Select this option if you want to disable continuous timer ticks
739 and have them programmed to occur as required. This option saves
740 power as the system can remain in idle state for longer.
742 By default dynamic tick is disabled during the boot, and can be
743 manually enabled with:
745 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
747 Alternatively, if you want dynamic tick automatically enabled
748 during boot, pass "dyntick=enable" via the kernel command string.
750 Please note that dynamic tick may affect the accuracy of
751 timekeeping on some platforms depending on the implementation.
752 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
753 to have accurate timekeeping with dynamic tick.
757 default 128 if ARCH_L7200
758 default 200 if ARCH_EBSA110 || ARCH_S3C2410
759 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
760 default AT91_TIMER_HZ if ARCH_AT91
764 bool "Use the ARM EABI to compile the kernel"
766 This option allows for the kernel to be compiled using the latest
767 ARM ABI (aka EABI). This is only useful if you are using a user
768 space environment that is also compiled with EABI.
770 Since there are major incompatibilities between the legacy ABI and
771 EABI, especially with regard to structure member alignment, this
772 option also changes the kernel syscall calling convention to
773 disambiguate both ABIs and allow for backward compatibility support
774 (selected with CONFIG_OABI_COMPAT).
776 To use this you need GCC version 4.0.0 or later.
779 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
780 depends on AEABI && EXPERIMENTAL
783 This option preserves the old syscall interface along with the
784 new (ARM EABI) one. It also provides a compatibility layer to
785 intercept syscalls that have structure arguments which layout
786 in memory differs between the legacy ABI and the new ARM EABI
787 (only for non "thumb" binaries). This option adds a tiny
788 overhead to all syscalls and produces a slightly larger kernel.
789 If you know you'll be using only pure EABI user space then you
790 can say N here. If this option is not selected and you attempt
791 to execute a legacy ABI binary then the result will be
792 UNPREDICTABLE (in fact it can be predicted that it won't work
793 at all). If in doubt say Y.
795 config ARCH_DISCONTIGMEM_ENABLE
797 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
799 Say Y to support efficient handling of discontiguous physical memory,
800 for architectures which are either NUMA (Non-Uniform Memory Access)
801 or have huge holes in the physical address space for other reasons.
802 See <file:Documentation/vm/numa> for more.
804 config ARCH_SPARSEMEM_ENABLE
807 config ARCH_SELECT_MEMORY_MODEL
812 default "4" if ARCH_LH7A40X
814 depends on NEED_MULTIPLE_NODES
819 bool "Timer and CPU usage LEDs"
820 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
821 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
822 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
823 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
824 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
825 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
826 ARCH_KS8695 || MACH_RD88F5182
828 If you say Y here, the LEDs on your machine will be used
829 to provide useful information about your current system status.
831 If you are compiling a kernel for a NetWinder or EBSA-285, you will
832 be able to select which LEDs are active using the options below. If
833 you are compiling a kernel for the EBSA-110 or the LART however, the
834 red LED will simply flash regularly to indicate that the system is
835 still functional. It is safe to say Y here if you have a CATS
836 system, but the driver will do nothing.
839 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
840 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
841 || MACH_OMAP_PERSEUS2
843 depends on !GENERIC_CLOCKEVENTS
844 default y if ARCH_EBSA110
846 If you say Y here, one of the system LEDs (the green one on the
847 NetWinder, the amber one on the EBSA285, or the red one on the LART)
848 will flash regularly to indicate that the system is still
849 operational. This is mainly useful to kernel hackers who are
850 debugging unstable kernels.
852 The LART uses the same LED for both Timer LED and CPU usage LED
853 functions. You may choose to use both, but the Timer LED function
854 will overrule the CPU usage LED.
857 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
859 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
860 || MACH_OMAP_PERSEUS2
863 If you say Y here, the red LED will be used to give a good real
864 time indication of CPU usage, by lighting whenever the idle task
865 is not currently executing.
867 The LART uses the same LED for both Timer LED and CPU usage LED
868 functions. You may choose to use both, but the Timer LED function
869 will overrule the CPU usage LED.
871 config ALIGNMENT_TRAP
873 depends on CPU_CP15_MMU
874 default y if !ARCH_EBSA110
876 ARM processors cannot fetch/store information which is not
877 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
878 address divisible by 4. On 32-bit ARM processors, these non-aligned
879 fetch/store instructions will be emulated in software if you say
880 here, which has a severe performance impact. This is necessary for
881 correct operation of some network protocols. With an IP-only
882 configuration it is safe to say N, otherwise say Y.
888 # Compressed boot loader in ROM. Yes, we really want to ask about
889 # TEXT and BSS so we preserve their values in the config files.
890 config ZBOOT_ROM_TEXT
891 hex "Compressed ROM boot loader base address"
894 The physical address at which the ROM-able zImage is to be
895 placed in the target. Platforms which normally make use of
896 ROM-able zImage formats normally set this to a suitable
897 value in their defconfig file.
899 If ZBOOT_ROM is not enabled, this has no effect.
902 hex "Compressed ROM boot loader BSS address"
905 The base address of an area of read/write memory in the target
906 for the ROM-able zImage which must be available while the
907 decompressor is running. It must be large enough to hold the
908 entire decompressed kernel plus an additional 128 KiB.
909 Platforms which normally make use of ROM-able zImage formats
910 normally set this to a suitable value in their defconfig file.
912 If ZBOOT_ROM is not enabled, this has no effect.
915 bool "Compressed boot loader in ROM/flash"
916 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
918 Say Y here if you intend to execute your compressed kernel image
919 (zImage) directly from ROM or flash. If unsure, say N.
922 string "Default kernel command string"
925 On some architectures (EBSA110 and CATS), there is currently no way
926 for the boot loader to pass arguments to the kernel. For these
927 architectures, you should supply some command-line options at build
928 time by entering them here. As a minimum, you should specify the
929 memory size and the root device (e.g., mem=64M root=/dev/nfs).
932 bool "Kernel Execute-In-Place from ROM"
933 depends on !ZBOOT_ROM
935 Execute-In-Place allows the kernel to run from non-volatile storage
936 directly addressable by the CPU, such as NOR flash. This saves RAM
937 space since the text section of the kernel is not loaded from flash
938 to RAM. Read-write sections, such as the data section and stack,
939 are still copied to RAM. The XIP kernel is not compressed since
940 it has to run directly from flash, so it will take more space to
941 store it. The flash address used to link the kernel object files,
942 and for storing it, is configuration dependent. Therefore, if you
943 say Y here, you must know the proper physical address where to
944 store the kernel image depending on your own flash memory usage.
946 Also note that the make target becomes "make xipImage" rather than
947 "make zImage" or "make Image". The final kernel binary to put in
948 ROM memory will be arch/arm/boot/xipImage.
953 hex "XIP Kernel Physical Location"
954 depends on XIP_KERNEL
957 This is the physical address in your flash memory the kernel will
958 be linked for and stored to. This address is dependent on your
962 bool "Kexec system call (EXPERIMENTAL)"
963 depends on EXPERIMENTAL
965 kexec is a system call that implements the ability to shutdown your
966 current kernel, and to start another kernel. It is like a reboot
967 but it is independent of the system firmware. And like a reboot
968 you can start any kernel with it, not just Linux.
970 It is an ongoing process to be certain the hardware in a machine
971 is properly shutdown, so do not be surprised if this code does not
972 initially work for you. It may help to enable device hotplugging
976 bool "Export atags in procfs"
980 Should the atags used to boot the kernel be exported in an "atags"
981 file in procfs. Useful with kexec.
985 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
987 menu "CPU Frequency scaling"
989 source "drivers/cpufreq/Kconfig"
991 config CPU_FREQ_SA1100
993 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
996 config CPU_FREQ_SA1110
998 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1001 config CPU_FREQ_INTEGRATOR
1002 tristate "CPUfreq driver for ARM Integrator CPUs"
1003 depends on ARCH_INTEGRATOR && CPU_FREQ
1006 This enables the CPUfreq driver for ARM Integrator CPUs.
1008 For details, take a look at <file:Documentation/cpu-freq>.
1013 tristate "CPUfreq driver for i.MX CPUs"
1014 depends on ARCH_IMX && CPU_FREQ
1017 This enables the CPUfreq driver for i.MX CPUs.
1023 depends on CPU_FREQ && ARCH_PXA && PXA25x
1025 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1031 menu "Floating point emulation"
1033 comment "At least one emulation must be selected"
1036 bool "NWFPE math emulation"
1037 depends on !AEABI || OABI_COMPAT
1039 Say Y to include the NWFPE floating point emulator in the kernel.
1040 This is necessary to run most binaries. Linux does not currently
1041 support floating point hardware so you need to say Y here even if
1042 your machine has an FPA or floating point co-processor podule.
1044 You may say N here if you are going to load the Acorn FPEmulator
1045 early in the bootup.
1048 bool "Support extended precision"
1049 depends on FPE_NWFPE
1051 Say Y to include 80-bit support in the kernel floating-point
1052 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1053 Note that gcc does not generate 80-bit operations by default,
1054 so in most cases this option only enlarges the size of the
1055 floating point emulator without any good reason.
1057 You almost surely want to say N here.
1060 bool "FastFPE math emulation (EXPERIMENTAL)"
1061 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1063 Say Y here to include the FAST floating point emulator in the kernel.
1064 This is an experimental much faster emulator which now also has full
1065 precision for the mantissa. It does not support any exceptions.
1066 It is very simple, and approximately 3-6 times faster than NWFPE.
1068 It should be sufficient for most programs. It may be not suitable
1069 for scientific calculations, but you have to check this for yourself.
1070 If you do not feel you need a faster FP emulation you should better
1074 bool "VFP-format floating point maths"
1075 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1077 Say Y to include VFP support code in the kernel. This is needed
1078 if your hardware includes a VFP unit.
1080 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1081 release notes and additional status information.
1083 Say N if your target does not have VFP hardware.
1091 bool "Advanced SIMD (NEON) Extension support"
1092 depends on VFPv3 && CPU_V7
1094 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1099 menu "Userspace binary formats"
1101 source "fs/Kconfig.binfmt"
1104 tristate "RISC OS personality"
1107 Say Y here to include the kernel code necessary if you want to run
1108 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1109 experimental; if this sounds frightening, say N and sleep in peace.
1110 You can also say M here to compile this support as a module (which
1111 will be called arthur).
1115 menu "Power management options"
1117 source "kernel/power/Kconfig"
1119 config ARCH_SUSPEND_POSSIBLE
1124 source "net/Kconfig"
1126 menu "Device Drivers"
1128 source "drivers/base/Kconfig"
1130 source "drivers/connector/Kconfig"
1132 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1133 source "drivers/mtd/Kconfig"
1136 source "drivers/parport/Kconfig"
1138 source "drivers/pnp/Kconfig"
1140 source "drivers/block/Kconfig"
1142 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1144 source "drivers/misc/Kconfig"
1146 source "drivers/ide/Kconfig"
1148 source "drivers/scsi/Kconfig"
1150 source "drivers/ata/Kconfig"
1152 source "drivers/md/Kconfig"
1154 source "drivers/message/fusion/Kconfig"
1156 source "drivers/ieee1394/Kconfig"
1158 source "drivers/message/i2o/Kconfig"
1160 source "drivers/net/Kconfig"
1162 source "drivers/isdn/Kconfig"
1164 # input before char - char/joystick depends on it. As does USB.
1166 source "drivers/input/Kconfig"
1168 source "drivers/char/Kconfig"
1170 source "drivers/i2c/Kconfig"
1172 source "drivers/spi/Kconfig"
1174 source "drivers/gpio/Kconfig"
1176 source "drivers/w1/Kconfig"
1178 source "drivers/power/Kconfig"
1180 source "drivers/hwmon/Kconfig"
1182 source "drivers/watchdog/Kconfig"
1184 source "drivers/ssb/Kconfig"
1186 #source "drivers/l3/Kconfig"
1188 source "drivers/mfd/Kconfig"
1190 source "drivers/media/Kconfig"
1192 source "drivers/video/Kconfig"
1194 source "sound/Kconfig"
1196 source "drivers/hid/Kconfig"
1198 source "drivers/usb/Kconfig"
1200 source "drivers/mmc/Kconfig"
1202 source "drivers/leds/Kconfig"
1204 source "drivers/rtc/Kconfig"
1206 source "drivers/dma/Kconfig"
1208 source "drivers/dca/Kconfig"
1210 source "drivers/uio/Kconfig"
1216 source "arch/arm/Kconfig.debug"
1218 source "security/Kconfig"
1220 source "crypto/Kconfig"
1222 source "lib/Kconfig"