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
16 select HAVE_KPROBES if (!XIP_KERNEL)
17 select HAVE_KRETPROBES if (HAVE_KPROBES)
18 select HAVE_FTRACE if (!XIP_KERNEL)
19 select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
20 select HAVE_GENERIC_DMA_COHERENT
22 The ARM series is a line of low-power-consumption RISC chip designs
23 licensed by ARM Ltd and targeted at embedded applications and
24 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
25 manufactured, but legacy ARM-based PC hardware remains popular in
26 Europe. There is an ARM Linux project with a web page at
27 <http://www.arm.linux.org.uk/>.
32 config SYS_SUPPORTS_APM_EMULATION
43 config GENERIC_CLOCKEVENTS
47 config GENERIC_CLOCKEVENTS_BROADCAST
49 depends on GENERIC_CLOCKEVENTS
50 default y if SMP && !LOCAL_TIMERS
63 The Extended Industry Standard Architecture (EISA) bus was
64 developed as an open alternative to the IBM MicroChannel bus.
66 The EISA bus provided some of the features of the IBM MicroChannel
67 bus while maintaining backward compatibility with cards made for
68 the older ISA bus. The EISA bus saw limited use between 1988 and
69 1995 when it was made obsolete by the PCI bus.
71 Say Y here if you are building a kernel for an EISA-based machine.
81 MicroChannel Architecture is found in some IBM PS/2 machines and
82 laptops. It is a bus system similar to PCI or ISA. See
83 <file:Documentation/mca.txt> (and especially the web page given
84 there) before attempting to build an MCA bus kernel.
86 config GENERIC_HARDIRQS
90 config STACKTRACE_SUPPORT
94 config HAVE_LATENCYTOP_SUPPORT
99 config LOCKDEP_SUPPORT
103 config TRACE_IRQFLAGS_SUPPORT
107 config HARDIRQS_SW_RESEND
111 config GENERIC_IRQ_PROBE
115 config GENERIC_LOCKBREAK
118 depends on SMP && PREEMPT
120 config RWSEM_GENERIC_SPINLOCK
124 config RWSEM_XCHGADD_ALGORITHM
127 config ARCH_HAS_ILOG2_U32
131 config ARCH_HAS_ILOG2_U64
135 config GENERIC_HWEIGHT
139 config GENERIC_CALIBRATE_DELAY
143 config ARCH_SUPPORTS_AOUT
146 config ARCH_MAY_HAVE_PC_FDC
153 config GENERIC_ISA_DMA
162 config GENERIC_HARDIRQS_NO__DO_IRQ
168 config OPROFILE_ARMV6
170 depends on CPU_V6 && !SMP
171 select OPROFILE_ARM11_CORE
173 config OPROFILE_MPCORE
175 depends on CPU_V6 && SMP
176 select OPROFILE_ARM11_CORE
178 config OPROFILE_ARM11_CORE
185 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
186 default DRAM_BASE if REMAP_VECTORS_TO_RAM
189 The base address of exception vectors.
191 source "init/Kconfig"
196 prompt "ARM system type"
197 default ARCH_VERSATILE
200 bool "Agilent AAEC-2000 based"
204 This enables support for systems based on the Agilent AAEC-2000
206 config ARCH_INTEGRATOR
207 bool "ARM Ltd. Integrator family"
212 Support for ARM's Integrator platform.
215 bool "ARM Ltd. RealView family"
220 select GENERIC_CLOCKEVENTS
222 This enables support for ARM Ltd RealView boards.
224 config ARCH_VERSATILE
225 bool "ARM Ltd. Versatile family"
231 select GENERIC_CLOCKEVENTS
233 This enables support for ARM Ltd Versatile board.
240 This enables support for systems based on the Atmel AT91RM9200,
241 AT91SAM9 and AT91CAP9 processors.
244 bool "Cirrus CL-PS7500FE"
249 Support for the Cirrus Logic PS7500FE system-on-a-chip.
252 bool "Cirrus Logic CLPS711x/EP721x-based"
254 Support for Cirrus Logic 711x/721x based boards.
261 This is an evaluation board for the StrongARM processor available
262 from Digital. It has limited hardware on-board, including an
263 Ethernet interface, two PCMCIA sockets, two serial ports and a
272 select ARCH_REQUIRE_GPIOLIB
274 This enables support for the Cirrus EP93xx series of CPUs.
276 config ARCH_FOOTBRIDGE
280 Support for systems based on the DC21285 companion chip
281 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
284 bool "Hilscher NetX based"
287 This enables support for systems based on the Hilscher NetX Soc
290 bool "Hynix HMS720x-based"
293 This enables support for systems based on the Hynix HMS720x
299 select GENERIC_CLOCKEVENTS
301 Support for Motorola's i.MX family of processors (MX1, MXL).
308 select ARCH_SUPPORTS_MSI
310 Support for Intel's IOP13XX (XScale) family of processors.
318 select ARCH_REQUIRE_GPIOLIB
320 Support for Intel's 80219 and IOP32X (XScale) family of
329 select ARCH_REQUIRE_GPIOLIB
331 Support for Intel's IOP33X (XScale) family of processors.
338 Support for Intel's IXP23xx (XScale) family of processors.
341 bool "IXP2400/2800-based"
345 Support for Intel's IXP2400/2800 (XScale) family of processors.
352 select GENERIC_CLOCKEVENTS
354 Support for Intel's IXP4XX (XScale) family of processors.
360 Say Y here if you intend to run this kernel on a LinkUp Systems
361 L7200 Software Development Board which uses an ARM720T processor.
362 Information on this board can be obtained at:
364 <http://www.linkupsys.com/>
366 If you have any questions or comments about the Linux kernel port
367 to this board, send e-mail to <sjhill@cotw.com>.
370 bool "Marvell Kirkwood"
373 select GENERIC_CLOCKEVENTS
376 Support for the following Marvell Kirkwood series SoCs:
377 88F6180, 88F6192 and 88F6281.
380 bool "Micrel/Kendin KS8695"
383 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
384 System-on-Chip devices.
387 bool "NetSilicon NS9xxx"
390 select GENERIC_CLOCKEVENTS
393 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
396 <http://www.digi.com/products/microprocessors/index.jsp>
399 bool "Marvell Loki (88RC8480)"
401 select GENERIC_CLOCKEVENTS
404 Support for the Marvell Loki (88RC8480) SoC.
407 bool "Marvell MV78xx0"
410 select GENERIC_CLOCKEVENTS
413 Support for the following Marvell MV78xx0 series SoCs:
417 bool "Freescale MXC/iMX-based"
419 select GENERIC_CLOCKEVENTS
422 select ARCH_REQUIRE_GPIOLIB
424 Support for Freescale MXC/iMX-based family of processors
432 select GENERIC_CLOCKEVENTS
435 Support for the following Marvell Orion 5x series SoCs:
436 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
440 bool "Philips Nexperia PNX4008 Mobile"
443 This enables support for Philips PNX4008 mobile platform.
446 bool "PXA2xx/PXA3xx-based"
451 select ARCH_REQUIRE_GPIOLIB
453 select GENERIC_CLOCKEVENTS
456 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
463 select ARCH_MAY_HAVE_PC_FDC
464 select HAVE_PATA_PLATFORM
468 On the Acorn Risc-PC, Linux can support the internal IDE disk and
469 CD-ROM interface, serial and parallel port, and the floppy drive.
474 select ARCH_DISCONTIGMEM_ENABLE
475 select ARCH_SPARSEMEM_ENABLE
476 select ARCH_SELECT_MEMORY_MODEL
480 select GENERIC_CLOCKEVENTS
483 select ARCH_REQUIRE_GPIOLIB
485 Support for StrongARM 11x0 based boards.
488 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
492 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
493 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
494 the Samsung SMDK2410 development board (and derivatives).
502 Support for the StrongARM based Digital DNARD machine, also known
503 as "Shark" (<http://www.shark-linux.de/shark.html>).
508 Say Y here for systems based on one of the Sharp LH7A40X
509 System on a Chip processors. These CPUs include an ARM922T
510 core with a wide array of integrated devices for
511 hand-held and low-power applications.
516 select GENERIC_CLOCKEVENTS
520 Support for TI's DaVinci platform.
526 select ARCH_REQUIRE_GPIOLIB
528 select GENERIC_CLOCKEVENTS
530 Support for TI's OMAP platform (OMAP1 and OMAP2).
533 bool "Qualcomm MSM7X00A"
535 select GENERIC_CLOCKEVENTS
537 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
538 apps processor of the MSM7X00A and depends on a shared memory
539 interface to the ARM9 modem processor which runs the baseband stack
540 and controls some vital subsystems (clock and power control, etc).
541 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
545 source "arch/arm/mach-clps711x/Kconfig"
547 source "arch/arm/mach-ep93xx/Kconfig"
549 source "arch/arm/mach-footbridge/Kconfig"
551 source "arch/arm/mach-integrator/Kconfig"
553 source "arch/arm/mach-iop32x/Kconfig"
555 source "arch/arm/mach-iop33x/Kconfig"
557 source "arch/arm/mach-iop13xx/Kconfig"
559 source "arch/arm/mach-ixp4xx/Kconfig"
561 source "arch/arm/mach-ixp2000/Kconfig"
563 source "arch/arm/mach-ixp23xx/Kconfig"
565 source "arch/arm/mach-loki/Kconfig"
567 source "arch/arm/mach-mv78xx0/Kconfig"
569 source "arch/arm/mach-pxa/Kconfig"
571 source "arch/arm/mach-sa1100/Kconfig"
573 source "arch/arm/plat-omap/Kconfig"
575 source "arch/arm/mach-omap1/Kconfig"
577 source "arch/arm/mach-omap2/Kconfig"
579 source "arch/arm/mach-orion5x/Kconfig"
581 source "arch/arm/mach-kirkwood/Kconfig"
583 source "arch/arm/plat-s3c24xx/Kconfig"
584 source "arch/arm/plat-s3c/Kconfig"
587 source "arch/arm/mach-s3c2400/Kconfig"
588 source "arch/arm/mach-s3c2410/Kconfig"
589 source "arch/arm/mach-s3c2412/Kconfig"
590 source "arch/arm/mach-s3c2440/Kconfig"
591 source "arch/arm/mach-s3c2442/Kconfig"
592 source "arch/arm/mach-s3c2443/Kconfig"
595 source "arch/arm/mach-lh7a40x/Kconfig"
597 source "arch/arm/mach-imx/Kconfig"
599 source "arch/arm/mach-h720x/Kconfig"
601 source "arch/arm/mach-versatile/Kconfig"
603 source "arch/arm/mach-aaec2000/Kconfig"
605 source "arch/arm/mach-realview/Kconfig"
607 source "arch/arm/mach-at91/Kconfig"
609 source "arch/arm/plat-mxc/Kconfig"
611 source "arch/arm/mach-netx/Kconfig"
613 source "arch/arm/mach-ns9xxx/Kconfig"
615 source "arch/arm/mach-davinci/Kconfig"
617 source "arch/arm/mach-ks8695/Kconfig"
619 source "arch/arm/mach-msm/Kconfig"
621 # Definitions to make life easier
631 source arch/arm/mm/Kconfig
634 bool "Enable iWMMXt support"
635 depends on CPU_XSCALE || CPU_XSC3
636 default y if PXA27x || PXA3xx
638 Enable support for iWMMXt context switching at run time if
639 running on a CPU that supports it.
641 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
644 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
648 source "arch/arm/Kconfig-nommu"
653 source "arch/arm/common/Kconfig"
655 config FORCE_MAX_ZONEORDER
668 Find out whether you have ISA slots on your motherboard. ISA is the
669 name of a bus system, i.e. the way the CPU talks to the other stuff
670 inside your box. Other bus systems are PCI, EISA, MicroChannel
671 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
672 newer boards don't support it. If you have ISA, say Y, otherwise N.
674 # Select ISA DMA controller support
679 # Select ISA DMA interface
684 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
686 Find out whether you have a PCI motherboard. PCI is the name of a
687 bus system, i.e. the way the CPU talks to the other stuff inside
688 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
689 VESA. If you have PCI, say Y, otherwise N.
694 # Select the host bridge type
695 config PCI_HOST_VIA82C505
697 depends on PCI && ARCH_SHARK
700 config PCI_HOST_ITE8152
702 depends on PCI && MACH_ARMCORE
706 source "drivers/pci/Kconfig"
708 source "drivers/pcmcia/Kconfig"
712 menu "Kernel Features"
714 source "kernel/time/Kconfig"
717 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
718 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
719 select USE_GENERIC_SMP_HELPERS
721 This enables support for systems with more than one CPU. If you have
722 a system with only one CPU, like most personal computers, say N. If
723 you have a system with more than one CPU, say Y.
725 If you say N here, the kernel will run on single and multiprocessor
726 machines, but will use only one CPU of a multiprocessor machine. If
727 you say Y here, the kernel will run on many, but not all, single
728 processor machines. On a single processor machine, the kernel will
729 run faster if you say N here.
731 See also <file:Documentation/i386/IO-APIC.txt>,
732 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
733 <http://www.linuxdoc.org/docs.html#howto>.
735 If you don't know what to do here, say N.
738 int "Maximum number of CPUs (2-32)"
744 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
745 depends on SMP && HOTPLUG && EXPERIMENTAL
747 Say Y here to experiment with turning CPUs off and on. CPUs
748 can be controlled through /sys/devices/system/cpu.
751 bool "Use local timer interrupts"
752 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
755 Enable support for local timers on SMP platforms, rather then the
756 legacy IPI broadcast method. Local timers allows the system
757 accounting to be spread across the timer interval, preventing a
758 "thundering herd" at every timer tick.
761 bool "Preemptible Kernel (EXPERIMENTAL)"
762 depends on EXPERIMENTAL
764 This option reduces the latency of the kernel when reacting to
765 real-time or interactive events by allowing a low priority process to
766 be preempted even if it is in kernel mode executing a system call.
767 This allows applications to run more reliably even when the system is
770 Say Y here if you are building a kernel for a desktop, embedded
771 or real-time system. Say N if you are unsure.
775 default 128 if ARCH_L7200
776 default 200 if ARCH_EBSA110 || ARCH_S3C2410
777 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
778 default AT91_TIMER_HZ if ARCH_AT91
782 bool "Use the ARM EABI to compile the kernel"
784 This option allows for the kernel to be compiled using the latest
785 ARM ABI (aka EABI). This is only useful if you are using a user
786 space environment that is also compiled with EABI.
788 Since there are major incompatibilities between the legacy ABI and
789 EABI, especially with regard to structure member alignment, this
790 option also changes the kernel syscall calling convention to
791 disambiguate both ABIs and allow for backward compatibility support
792 (selected with CONFIG_OABI_COMPAT).
794 To use this you need GCC version 4.0.0 or later.
797 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
798 depends on AEABI && EXPERIMENTAL
801 This option preserves the old syscall interface along with the
802 new (ARM EABI) one. It also provides a compatibility layer to
803 intercept syscalls that have structure arguments which layout
804 in memory differs between the legacy ABI and the new ARM EABI
805 (only for non "thumb" binaries). This option adds a tiny
806 overhead to all syscalls and produces a slightly larger kernel.
807 If you know you'll be using only pure EABI user space then you
808 can say N here. If this option is not selected and you attempt
809 to execute a legacy ABI binary then the result will be
810 UNPREDICTABLE (in fact it can be predicted that it won't work
811 at all). If in doubt say Y.
813 config ARCH_DISCONTIGMEM_ENABLE
815 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
817 Say Y to support efficient handling of discontiguous physical memory,
818 for architectures which are either NUMA (Non-Uniform Memory Access)
819 or have huge holes in the physical address space for other reasons.
820 See <file:Documentation/vm/numa> for more.
822 config ARCH_SPARSEMEM_ENABLE
825 config ARCH_SELECT_MEMORY_MODEL
830 default "4" if ARCH_LH7A40X
832 depends on NEED_MULTIPLE_NODES
837 bool "Timer and CPU usage LEDs"
838 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
839 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
840 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
841 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
842 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
843 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
844 ARCH_KS8695 || MACH_RD88F5182
846 If you say Y here, the LEDs on your machine will be used
847 to provide useful information about your current system status.
849 If you are compiling a kernel for a NetWinder or EBSA-285, you will
850 be able to select which LEDs are active using the options below. If
851 you are compiling a kernel for the EBSA-110 or the LART however, the
852 red LED will simply flash regularly to indicate that the system is
853 still functional. It is safe to say Y here if you have a CATS
854 system, but the driver will do nothing.
857 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
858 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
859 || MACH_OMAP_PERSEUS2
861 depends on !GENERIC_CLOCKEVENTS
862 default y if ARCH_EBSA110
864 If you say Y here, one of the system LEDs (the green one on the
865 NetWinder, the amber one on the EBSA285, or the red one on the LART)
866 will flash regularly to indicate that the system is still
867 operational. This is mainly useful to kernel hackers who are
868 debugging unstable kernels.
870 The LART uses the same LED for both Timer LED and CPU usage LED
871 functions. You may choose to use both, but the Timer LED function
872 will overrule the CPU usage LED.
875 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
877 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
878 || MACH_OMAP_PERSEUS2
881 If you say Y here, the red LED will be used to give a good real
882 time indication of CPU usage, by lighting whenever the idle task
883 is not currently executing.
885 The LART uses the same LED for both Timer LED and CPU usage LED
886 functions. You may choose to use both, but the Timer LED function
887 will overrule the CPU usage LED.
889 config ALIGNMENT_TRAP
891 depends on CPU_CP15_MMU
892 default y if !ARCH_EBSA110
894 ARM processors cannot fetch/store information which is not
895 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
896 address divisible by 4. On 32-bit ARM processors, these non-aligned
897 fetch/store instructions will be emulated in software if you say
898 here, which has a severe performance impact. This is necessary for
899 correct operation of some network protocols. With an IP-only
900 configuration it is safe to say N, otherwise say Y.
906 # Compressed boot loader in ROM. Yes, we really want to ask about
907 # TEXT and BSS so we preserve their values in the config files.
908 config ZBOOT_ROM_TEXT
909 hex "Compressed ROM boot loader base address"
912 The physical address at which the ROM-able zImage is to be
913 placed in the target. Platforms which normally make use of
914 ROM-able zImage formats normally set this to a suitable
915 value in their defconfig file.
917 If ZBOOT_ROM is not enabled, this has no effect.
920 hex "Compressed ROM boot loader BSS address"
923 The base address of an area of read/write memory in the target
924 for the ROM-able zImage which must be available while the
925 decompressor is running. It must be large enough to hold the
926 entire decompressed kernel plus an additional 128 KiB.
927 Platforms which normally make use of ROM-able zImage formats
928 normally set this to a suitable value in their defconfig file.
930 If ZBOOT_ROM is not enabled, this has no effect.
933 bool "Compressed boot loader in ROM/flash"
934 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
936 Say Y here if you intend to execute your compressed kernel image
937 (zImage) directly from ROM or flash. If unsure, say N.
940 string "Default kernel command string"
943 On some architectures (EBSA110 and CATS), there is currently no way
944 for the boot loader to pass arguments to the kernel. For these
945 architectures, you should supply some command-line options at build
946 time by entering them here. As a minimum, you should specify the
947 memory size and the root device (e.g., mem=64M root=/dev/nfs).
950 bool "Kernel Execute-In-Place from ROM"
951 depends on !ZBOOT_ROM
953 Execute-In-Place allows the kernel to run from non-volatile storage
954 directly addressable by the CPU, such as NOR flash. This saves RAM
955 space since the text section of the kernel is not loaded from flash
956 to RAM. Read-write sections, such as the data section and stack,
957 are still copied to RAM. The XIP kernel is not compressed since
958 it has to run directly from flash, so it will take more space to
959 store it. The flash address used to link the kernel object files,
960 and for storing it, is configuration dependent. Therefore, if you
961 say Y here, you must know the proper physical address where to
962 store the kernel image depending on your own flash memory usage.
964 Also note that the make target becomes "make xipImage" rather than
965 "make zImage" or "make Image". The final kernel binary to put in
966 ROM memory will be arch/arm/boot/xipImage.
971 hex "XIP Kernel Physical Location"
972 depends on XIP_KERNEL
975 This is the physical address in your flash memory the kernel will
976 be linked for and stored to. This address is dependent on your
980 bool "Kexec system call (EXPERIMENTAL)"
981 depends on EXPERIMENTAL
983 kexec is a system call that implements the ability to shutdown your
984 current kernel, and to start another kernel. It is like a reboot
985 but it is independent of the system firmware. And like a reboot
986 you can start any kernel with it, not just Linux.
988 It is an ongoing process to be certain the hardware in a machine
989 is properly shutdown, so do not be surprised if this code does not
990 initially work for you. It may help to enable device hotplugging
994 bool "Export atags in procfs"
998 Should the atags used to boot the kernel be exported in an "atags"
999 file in procfs. Useful with kexec.
1003 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1005 menu "CPU Frequency scaling"
1007 source "drivers/cpufreq/Kconfig"
1009 config CPU_FREQ_SA1100
1011 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1014 config CPU_FREQ_SA1110
1016 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1019 config CPU_FREQ_INTEGRATOR
1020 tristate "CPUfreq driver for ARM Integrator CPUs"
1021 depends on ARCH_INTEGRATOR && CPU_FREQ
1024 This enables the CPUfreq driver for ARM Integrator CPUs.
1026 For details, take a look at <file:Documentation/cpu-freq>.
1031 tristate "CPUfreq driver for i.MX CPUs"
1032 depends on ARCH_IMX && CPU_FREQ
1035 This enables the CPUfreq driver for i.MX CPUs.
1041 depends on CPU_FREQ && ARCH_PXA && PXA25x
1043 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1049 menu "Floating point emulation"
1051 comment "At least one emulation must be selected"
1054 bool "NWFPE math emulation"
1055 depends on !AEABI || OABI_COMPAT
1057 Say Y to include the NWFPE floating point emulator in the kernel.
1058 This is necessary to run most binaries. Linux does not currently
1059 support floating point hardware so you need to say Y here even if
1060 your machine has an FPA or floating point co-processor podule.
1062 You may say N here if you are going to load the Acorn FPEmulator
1063 early in the bootup.
1066 bool "Support extended precision"
1067 depends on FPE_NWFPE
1069 Say Y to include 80-bit support in the kernel floating-point
1070 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1071 Note that gcc does not generate 80-bit operations by default,
1072 so in most cases this option only enlarges the size of the
1073 floating point emulator without any good reason.
1075 You almost surely want to say N here.
1078 bool "FastFPE math emulation (EXPERIMENTAL)"
1079 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1081 Say Y here to include the FAST floating point emulator in the kernel.
1082 This is an experimental much faster emulator which now also has full
1083 precision for the mantissa. It does not support any exceptions.
1084 It is very simple, and approximately 3-6 times faster than NWFPE.
1086 It should be sufficient for most programs. It may be not suitable
1087 for scientific calculations, but you have to check this for yourself.
1088 If you do not feel you need a faster FP emulation you should better
1092 bool "VFP-format floating point maths"
1093 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1095 Say Y to include VFP support code in the kernel. This is needed
1096 if your hardware includes a VFP unit.
1098 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1099 release notes and additional status information.
1101 Say N if your target does not have VFP hardware.
1109 bool "Advanced SIMD (NEON) Extension support"
1110 depends on VFPv3 && CPU_V7
1112 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1117 menu "Userspace binary formats"
1119 source "fs/Kconfig.binfmt"
1122 tristate "RISC OS personality"
1125 Say Y here to include the kernel code necessary if you want to run
1126 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1127 experimental; if this sounds frightening, say N and sleep in peace.
1128 You can also say M here to compile this support as a module (which
1129 will be called arthur).
1133 menu "Power management options"
1135 source "kernel/power/Kconfig"
1137 config ARCH_SUSPEND_POSSIBLE
1142 source "net/Kconfig"
1144 menu "Device Drivers"
1146 source "drivers/base/Kconfig"
1148 source "drivers/connector/Kconfig"
1150 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1151 source "drivers/mtd/Kconfig"
1154 source "drivers/parport/Kconfig"
1156 source "drivers/pnp/Kconfig"
1158 source "drivers/block/Kconfig"
1160 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1162 source "drivers/misc/Kconfig"
1164 source "drivers/ide/Kconfig"
1166 source "drivers/scsi/Kconfig"
1168 source "drivers/ata/Kconfig"
1170 source "drivers/md/Kconfig"
1172 source "drivers/message/fusion/Kconfig"
1174 source "drivers/ieee1394/Kconfig"
1176 source "drivers/message/i2o/Kconfig"
1178 source "drivers/net/Kconfig"
1180 source "drivers/isdn/Kconfig"
1182 # input before char - char/joystick depends on it. As does USB.
1184 source "drivers/input/Kconfig"
1186 source "drivers/char/Kconfig"
1188 source "drivers/i2c/Kconfig"
1190 source "drivers/spi/Kconfig"
1192 source "drivers/gpio/Kconfig"
1194 source "drivers/w1/Kconfig"
1196 source "drivers/power/Kconfig"
1198 source "drivers/hwmon/Kconfig"
1200 source "drivers/watchdog/Kconfig"
1202 source "drivers/ssb/Kconfig"
1204 #source "drivers/l3/Kconfig"
1206 source "drivers/mfd/Kconfig"
1208 source "drivers/media/Kconfig"
1210 source "drivers/video/Kconfig"
1212 source "sound/Kconfig"
1214 source "drivers/hid/Kconfig"
1216 source "drivers/usb/Kconfig"
1218 source "drivers/mmc/Kconfig"
1220 source "drivers/leds/Kconfig"
1222 source "drivers/rtc/Kconfig"
1224 source "drivers/dma/Kconfig"
1226 source "drivers/dca/Kconfig"
1228 source "drivers/uio/Kconfig"
1234 source "arch/arm/Kconfig.debug"
1236 source "security/Kconfig"
1238 source "crypto/Kconfig"
1240 source "lib/Kconfig"