2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
6 mainmenu "Linux Kernel Configuration"
14 select SYS_SUPPORTS_APM_EMULATION
17 select HAVE_KPROBES if (!XIP_KERNEL)
18 select HAVE_KRETPROBES if (HAVE_KPROBES)
19 select HAVE_FTRACE if (!XIP_KERNEL)
20 select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
21 select HAVE_GENERIC_DMA_COHERENT
23 The ARM series is a line of low-power-consumption RISC chip designs
24 licensed by ARM Ltd and targeted at embedded applications and
25 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
26 manufactured, but legacy ARM-based PC hardware remains popular in
27 Europe. There is an ARM Linux project with a web page at
28 <http://www.arm.linux.org.uk/>.
33 config SYS_SUPPORTS_APM_EMULATION
44 config GENERIC_CLOCKEVENTS
48 config GENERIC_CLOCKEVENTS_BROADCAST
50 depends on GENERIC_CLOCKEVENTS
51 default y if SMP && !LOCAL_TIMERS
64 The Extended Industry Standard Architecture (EISA) bus was
65 developed as an open alternative to the IBM MicroChannel bus.
67 The EISA bus provided some of the features of the IBM MicroChannel
68 bus while maintaining backward compatibility with cards made for
69 the older ISA bus. The EISA bus saw limited use between 1988 and
70 1995 when it was made obsolete by the PCI bus.
72 Say Y here if you are building a kernel for an EISA-based machine.
82 MicroChannel Architecture is found in some IBM PS/2 machines and
83 laptops. It is a bus system similar to PCI or ISA. See
84 <file:Documentation/mca.txt> (and especially the web page given
85 there) before attempting to build an MCA bus kernel.
87 config GENERIC_HARDIRQS
91 config STACKTRACE_SUPPORT
95 config HAVE_LATENCYTOP_SUPPORT
100 config LOCKDEP_SUPPORT
104 config TRACE_IRQFLAGS_SUPPORT
108 config HARDIRQS_SW_RESEND
112 config GENERIC_IRQ_PROBE
116 config GENERIC_LOCKBREAK
119 depends on SMP && PREEMPT
121 config RWSEM_GENERIC_SPINLOCK
125 config RWSEM_XCHGADD_ALGORITHM
128 config ARCH_HAS_ILOG2_U32
132 config ARCH_HAS_ILOG2_U64
136 config GENERIC_HWEIGHT
140 config GENERIC_CALIBRATE_DELAY
144 config ARCH_MAY_HAVE_PC_FDC
150 config GENERIC_ISA_DMA
159 config GENERIC_HARDIRQS_NO__DO_IRQ
165 config OPROFILE_ARMV6
167 depends on CPU_V6 && !SMP
168 select OPROFILE_ARM11_CORE
170 config OPROFILE_MPCORE
172 depends on CPU_V6 && SMP
173 select OPROFILE_ARM11_CORE
175 config OPROFILE_ARM11_CORE
178 config OPROFILE_ARMV7
180 depends on CPU_V7 && !SMP
187 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
188 default DRAM_BASE if REMAP_VECTORS_TO_RAM
191 The base address of exception vectors.
193 source "init/Kconfig"
198 prompt "ARM system type"
199 default ARCH_VERSATILE
202 bool "Agilent AAEC-2000 based"
206 This enables support for systems based on the Agilent AAEC-2000
208 config ARCH_INTEGRATOR
209 bool "ARM Ltd. Integrator family"
214 Support for ARM's Integrator platform.
217 bool "ARM Ltd. RealView family"
222 select GENERIC_CLOCKEVENTS
224 This enables support for ARM Ltd RealView boards.
226 config ARCH_VERSATILE
227 bool "ARM Ltd. Versatile family"
233 select GENERIC_CLOCKEVENTS
235 This enables support for ARM Ltd Versatile board.
242 This enables support for systems based on the Atmel AT91RM9200,
243 AT91SAM9 and AT91CAP9 processors.
246 bool "Cirrus CL-PS7500FE"
250 select ARCH_SPARSEMEM_ENABLE
252 Support for the Cirrus Logic PS7500FE system-on-a-chip.
255 bool "Cirrus Logic CLPS711x/EP721x-based"
257 Support for Cirrus Logic 711x/721x based boards.
264 This is an evaluation board for the StrongARM processor available
265 from Digital. It has limited hardware on-board, including an
266 Ethernet interface, two PCMCIA sockets, two serial ports and a
275 select ARCH_REQUIRE_GPIOLIB
277 This enables support for the Cirrus EP93xx series of CPUs.
279 config ARCH_FOOTBRIDGE
283 Support for systems based on the DC21285 companion chip
284 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
287 bool "Hilscher NetX based"
290 This enables support for systems based on the Hilscher NetX Soc
293 bool "Hynix HMS720x-based"
296 This enables support for systems based on the Hynix HMS720x
302 select GENERIC_CLOCKEVENTS
304 Support for Motorola's i.MX family of processors (MX1, MXL).
311 select ARCH_SUPPORTS_MSI
314 Support for Intel's IOP13XX (XScale) family of processors.
322 select ARCH_REQUIRE_GPIOLIB
324 Support for Intel's 80219 and IOP32X (XScale) family of
333 select ARCH_REQUIRE_GPIOLIB
335 Support for Intel's IOP33X (XScale) family of processors.
342 Support for Intel's IXP23xx (XScale) family of processors.
345 bool "IXP2400/2800-based"
349 Support for Intel's IXP2400/2800 (XScale) family of processors.
356 select GENERIC_CLOCKEVENTS
357 select ZONE_DMA if PCI
359 Support for Intel's IXP4XX (XScale) family of processors.
365 Say Y here if you intend to run this kernel on a LinkUp Systems
366 L7200 Software Development Board which uses an ARM720T processor.
367 Information on this board can be obtained at:
369 <http://www.linkupsys.com/>
371 If you have any questions or comments about the Linux kernel port
372 to this board, send e-mail to <sjhill@cotw.com>.
375 bool "Marvell Kirkwood"
378 select GENERIC_CLOCKEVENTS
381 Support for the following Marvell Kirkwood series SoCs:
382 88F6180, 88F6192 and 88F6281.
385 bool "Micrel/Kendin KS8695"
388 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
389 System-on-Chip devices.
392 bool "NetSilicon NS9xxx"
395 select GENERIC_CLOCKEVENTS
398 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
401 <http://www.digi.com/products/microprocessors/index.jsp>
404 bool "Marvell Loki (88RC8480)"
406 select GENERIC_CLOCKEVENTS
409 Support for the Marvell Loki (88RC8480) SoC.
412 bool "Marvell MV78xx0"
415 select GENERIC_CLOCKEVENTS
418 Support for the following Marvell MV78xx0 series SoCs:
422 bool "Freescale MXC/iMX-based"
424 select GENERIC_CLOCKEVENTS
427 select ARCH_REQUIRE_GPIOLIB
429 Support for Freescale MXC/iMX-based family of processors
437 select GENERIC_CLOCKEVENTS
440 Support for the following Marvell Orion 5x series SoCs:
441 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
442 Orion-2 (5281), Orion-1-90 (6183).
445 bool "Philips Nexperia PNX4008 Mobile"
448 This enables support for Philips PNX4008 mobile platform.
451 bool "PXA2xx/PXA3xx-based"
456 select ARCH_REQUIRE_GPIOLIB
458 select GENERIC_CLOCKEVENTS
461 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
468 select ARCH_MAY_HAVE_PC_FDC
469 select HAVE_PATA_PLATFORM
472 select ARCH_SPARSEMEM_ENABLE
474 On the Acorn Risc-PC, Linux can support the internal IDE disk and
475 CD-ROM interface, serial and parallel port, and the floppy drive.
480 select ARCH_SPARSEMEM_ENABLE
484 select GENERIC_CLOCKEVENTS
487 select ARCH_REQUIRE_GPIOLIB
489 Support for StrongARM 11x0 based boards.
492 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
496 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
497 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
498 the Samsung SMDK2410 development board (and derivatives).
507 Support for the StrongARM based Digital DNARD machine, also known
508 as "Shark" (<http://www.shark-linux.de/shark.html>).
512 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
513 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
515 Say Y here for systems based on one of the Sharp LH7A40X
516 System on a Chip processors. These CPUs include an ARM922T
517 core with a wide array of integrated devices for
518 hand-held and low-power applications.
523 select GENERIC_CLOCKEVENTS
525 select ARCH_REQUIRE_GPIOLIB
529 Support for TI's DaVinci platform.
535 select ARCH_REQUIRE_GPIOLIB
537 select GENERIC_CLOCKEVENTS
539 Support for TI's OMAP platform (OMAP1 and OMAP2).
542 bool "Qualcomm MSM7X00A"
544 select GENERIC_CLOCKEVENTS
546 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
547 apps processor of the MSM7X00A and depends on a shared memory
548 interface to the ARM9 modem processor which runs the baseband stack
549 and controls some vital subsystems (clock and power control, etc).
550 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
554 source "arch/arm/mach-clps711x/Kconfig"
556 source "arch/arm/mach-ep93xx/Kconfig"
558 source "arch/arm/mach-footbridge/Kconfig"
560 source "arch/arm/mach-integrator/Kconfig"
562 source "arch/arm/mach-iop32x/Kconfig"
564 source "arch/arm/mach-iop33x/Kconfig"
566 source "arch/arm/mach-iop13xx/Kconfig"
568 source "arch/arm/mach-ixp4xx/Kconfig"
570 source "arch/arm/mach-ixp2000/Kconfig"
572 source "arch/arm/mach-ixp23xx/Kconfig"
574 source "arch/arm/mach-loki/Kconfig"
576 source "arch/arm/mach-mv78xx0/Kconfig"
578 source "arch/arm/mach-pxa/Kconfig"
580 source "arch/arm/mach-sa1100/Kconfig"
582 source "arch/arm/plat-omap/Kconfig"
584 source "arch/arm/mach-omap1/Kconfig"
586 source "arch/arm/mach-omap2/Kconfig"
588 source "arch/arm/mach-orion5x/Kconfig"
590 source "arch/arm/mach-kirkwood/Kconfig"
592 source "arch/arm/plat-s3c24xx/Kconfig"
593 source "arch/arm/plat-s3c/Kconfig"
596 source "arch/arm/mach-s3c2400/Kconfig"
597 source "arch/arm/mach-s3c2410/Kconfig"
598 source "arch/arm/mach-s3c2412/Kconfig"
599 source "arch/arm/mach-s3c2440/Kconfig"
600 source "arch/arm/mach-s3c2442/Kconfig"
601 source "arch/arm/mach-s3c2443/Kconfig"
604 source "arch/arm/mach-lh7a40x/Kconfig"
606 source "arch/arm/mach-imx/Kconfig"
608 source "arch/arm/mach-h720x/Kconfig"
610 source "arch/arm/mach-versatile/Kconfig"
612 source "arch/arm/mach-aaec2000/Kconfig"
614 source "arch/arm/mach-realview/Kconfig"
616 source "arch/arm/mach-at91/Kconfig"
618 source "arch/arm/plat-mxc/Kconfig"
620 source "arch/arm/mach-netx/Kconfig"
622 source "arch/arm/mach-ns9xxx/Kconfig"
624 source "arch/arm/mach-davinci/Kconfig"
626 source "arch/arm/mach-ks8695/Kconfig"
628 source "arch/arm/mach-msm/Kconfig"
630 # Definitions to make life easier
640 source arch/arm/mm/Kconfig
643 bool "Enable iWMMXt support"
644 depends on CPU_XSCALE || CPU_XSC3
645 default y if PXA27x || PXA3xx
647 Enable support for iWMMXt context switching at run time if
648 running on a CPU that supports it.
650 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
653 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
657 source "arch/arm/Kconfig-nommu"
662 source "arch/arm/common/Kconfig"
664 config FORCE_MAX_ZONEORDER
677 Find out whether you have ISA slots on your motherboard. ISA is the
678 name of a bus system, i.e. the way the CPU talks to the other stuff
679 inside your box. Other bus systems are PCI, EISA, MicroChannel
680 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
681 newer boards don't support it. If you have ISA, say Y, otherwise N.
683 # Select ISA DMA controller support
688 # Select ISA DMA interface
693 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
695 Find out whether you have a PCI motherboard. PCI is the name of a
696 bus system, i.e. the way the CPU talks to the other stuff inside
697 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
698 VESA. If you have PCI, say Y, otherwise N.
703 # Select the host bridge type
704 config PCI_HOST_VIA82C505
706 depends on PCI && ARCH_SHARK
709 config PCI_HOST_ITE8152
711 depends on PCI && MACH_ARMCORE
715 source "drivers/pci/Kconfig"
717 source "drivers/pcmcia/Kconfig"
721 menu "Kernel Features"
723 source "kernel/time/Kconfig"
726 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
727 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
728 select USE_GENERIC_SMP_HELPERS
730 This enables support for systems with more than one CPU. If you have
731 a system with only one CPU, like most personal computers, say N. If
732 you have a system with more than one CPU, say Y.
734 If you say N here, the kernel will run on single and multiprocessor
735 machines, but will use only one CPU of a multiprocessor machine. If
736 you say Y here, the kernel will run on many, but not all, single
737 processor machines. On a single processor machine, the kernel will
738 run faster if you say N here.
740 See also <file:Documentation/i386/IO-APIC.txt>,
741 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
742 <http://www.linuxdoc.org/docs.html#howto>.
744 If you don't know what to do here, say N.
747 prompt "Memory split"
750 Select the desired split between kernel and user memory.
752 If you are not absolutely sure what you are doing, leave this
756 bool "3G/1G user/kernel split"
758 bool "2G/2G user/kernel split"
760 bool "1G/3G user/kernel split"
765 default 0x40000000 if VMSPLIT_1G
766 default 0x80000000 if VMSPLIT_2G
770 int "Maximum number of CPUs (2-32)"
776 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
777 depends on SMP && HOTPLUG && EXPERIMENTAL
779 Say Y here to experiment with turning CPUs off and on. CPUs
780 can be controlled through /sys/devices/system/cpu.
783 bool "Use local timer interrupts"
784 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
787 Enable support for local timers on SMP platforms, rather then the
788 legacy IPI broadcast method. Local timers allows the system
789 accounting to be spread across the timer interval, preventing a
790 "thundering herd" at every timer tick.
793 bool "Preemptible Kernel (EXPERIMENTAL)"
794 depends on EXPERIMENTAL
796 This option reduces the latency of the kernel when reacting to
797 real-time or interactive events by allowing a low priority process to
798 be preempted even if it is in kernel mode executing a system call.
799 This allows applications to run more reliably even when the system is
802 Say Y here if you are building a kernel for a desktop, embedded
803 or real-time system. Say N if you are unsure.
807 default 128 if ARCH_L7200
808 default 200 if ARCH_EBSA110 || ARCH_S3C2410
809 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
810 default AT91_TIMER_HZ if ARCH_AT91
814 bool "Use the ARM EABI to compile the kernel"
816 This option allows for the kernel to be compiled using the latest
817 ARM ABI (aka EABI). This is only useful if you are using a user
818 space environment that is also compiled with EABI.
820 Since there are major incompatibilities between the legacy ABI and
821 EABI, especially with regard to structure member alignment, this
822 option also changes the kernel syscall calling convention to
823 disambiguate both ABIs and allow for backward compatibility support
824 (selected with CONFIG_OABI_COMPAT).
826 To use this you need GCC version 4.0.0 or later.
829 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
830 depends on AEABI && EXPERIMENTAL
833 This option preserves the old syscall interface along with the
834 new (ARM EABI) one. It also provides a compatibility layer to
835 intercept syscalls that have structure arguments which layout
836 in memory differs between the legacy ABI and the new ARM EABI
837 (only for non "thumb" binaries). This option adds a tiny
838 overhead to all syscalls and produces a slightly larger kernel.
839 If you know you'll be using only pure EABI user space then you
840 can say N here. If this option is not selected and you attempt
841 to execute a legacy ABI binary then the result will be
842 UNPREDICTABLE (in fact it can be predicted that it won't work
843 at all). If in doubt say Y.
845 config ARCH_FLATMEM_HAS_HOLES
850 # Discontigmem is deprecated
851 config ARCH_DISCONTIGMEM_ENABLE
854 config ARCH_SPARSEMEM_ENABLE
857 config ARCH_SPARSEMEM_DEFAULT
858 def_bool ARCH_SPARSEMEM_ENABLE
860 config ARCH_SELECT_MEMORY_MODEL
861 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
865 default "4" if ARCH_LH7A40X
867 depends on NEED_MULTIPLE_NODES
872 bool "Timer and CPU usage LEDs"
873 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
874 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
875 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
876 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
877 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
878 ARCH_AT91 || ARCH_DAVINCI || \
879 ARCH_KS8695 || MACH_RD88F5182
881 If you say Y here, the LEDs on your machine will be used
882 to provide useful information about your current system status.
884 If you are compiling a kernel for a NetWinder or EBSA-285, you will
885 be able to select which LEDs are active using the options below. If
886 you are compiling a kernel for the EBSA-110 or the LART however, the
887 red LED will simply flash regularly to indicate that the system is
888 still functional. It is safe to say Y here if you have a CATS
889 system, but the driver will do nothing.
892 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
893 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
894 || MACH_OMAP_PERSEUS2
896 depends on !GENERIC_CLOCKEVENTS
897 default y if ARCH_EBSA110
899 If you say Y here, one of the system LEDs (the green one on the
900 NetWinder, the amber one on the EBSA285, or the red one on the LART)
901 will flash regularly to indicate that the system is still
902 operational. This is mainly useful to kernel hackers who are
903 debugging unstable kernels.
905 The LART uses the same LED for both Timer LED and CPU usage LED
906 functions. You may choose to use both, but the Timer LED function
907 will overrule the CPU usage LED.
910 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
912 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
913 || MACH_OMAP_PERSEUS2
916 If you say Y here, the red LED will be used to give a good real
917 time indication of CPU usage, by lighting whenever the idle task
918 is not currently executing.
920 The LART uses the same LED for both Timer LED and CPU usage LED
921 functions. You may choose to use both, but the Timer LED function
922 will overrule the CPU usage LED.
924 config ALIGNMENT_TRAP
926 depends on CPU_CP15_MMU
927 default y if !ARCH_EBSA110
929 ARM processors cannot fetch/store information which is not
930 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
931 address divisible by 4. On 32-bit ARM processors, these non-aligned
932 fetch/store instructions will be emulated in software if you say
933 here, which has a severe performance impact. This is necessary for
934 correct operation of some network protocols. With an IP-only
935 configuration it is safe to say N, otherwise say Y.
941 # Compressed boot loader in ROM. Yes, we really want to ask about
942 # TEXT and BSS so we preserve their values in the config files.
943 config ZBOOT_ROM_TEXT
944 hex "Compressed ROM boot loader base address"
947 The physical address at which the ROM-able zImage is to be
948 placed in the target. Platforms which normally make use of
949 ROM-able zImage formats normally set this to a suitable
950 value in their defconfig file.
952 If ZBOOT_ROM is not enabled, this has no effect.
955 hex "Compressed ROM boot loader BSS address"
958 The base address of an area of read/write memory in the target
959 for the ROM-able zImage which must be available while the
960 decompressor is running. It must be large enough to hold the
961 entire decompressed kernel plus an additional 128 KiB.
962 Platforms which normally make use of ROM-able zImage formats
963 normally set this to a suitable value in their defconfig file.
965 If ZBOOT_ROM is not enabled, this has no effect.
968 bool "Compressed boot loader in ROM/flash"
969 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
971 Say Y here if you intend to execute your compressed kernel image
972 (zImage) directly from ROM or flash. If unsure, say N.
975 string "Default kernel command string"
978 On some architectures (EBSA110 and CATS), there is currently no way
979 for the boot loader to pass arguments to the kernel. For these
980 architectures, you should supply some command-line options at build
981 time by entering them here. As a minimum, you should specify the
982 memory size and the root device (e.g., mem=64M root=/dev/nfs).
985 bool "Kernel Execute-In-Place from ROM"
986 depends on !ZBOOT_ROM
988 Execute-In-Place allows the kernel to run from non-volatile storage
989 directly addressable by the CPU, such as NOR flash. This saves RAM
990 space since the text section of the kernel is not loaded from flash
991 to RAM. Read-write sections, such as the data section and stack,
992 are still copied to RAM. The XIP kernel is not compressed since
993 it has to run directly from flash, so it will take more space to
994 store it. The flash address used to link the kernel object files,
995 and for storing it, is configuration dependent. Therefore, if you
996 say Y here, you must know the proper physical address where to
997 store the kernel image depending on your own flash memory usage.
999 Also note that the make target becomes "make xipImage" rather than
1000 "make zImage" or "make Image". The final kernel binary to put in
1001 ROM memory will be arch/arm/boot/xipImage.
1005 config XIP_PHYS_ADDR
1006 hex "XIP Kernel Physical Location"
1007 depends on XIP_KERNEL
1008 default "0x00080000"
1010 This is the physical address in your flash memory the kernel will
1011 be linked for and stored to. This address is dependent on your
1015 bool "Kexec system call (EXPERIMENTAL)"
1016 depends on EXPERIMENTAL
1018 kexec is a system call that implements the ability to shutdown your
1019 current kernel, and to start another kernel. It is like a reboot
1020 but it is independent of the system firmware. And like a reboot
1021 you can start any kernel with it, not just Linux.
1023 It is an ongoing process to be certain the hardware in a machine
1024 is properly shutdown, so do not be surprised if this code does not
1025 initially work for you. It may help to enable device hotplugging
1029 bool "Export atags in procfs"
1033 Should the atags used to boot the kernel be exported in an "atags"
1034 file in procfs. Useful with kexec.
1038 menu "CPU Power Management"
1040 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1042 source "drivers/cpufreq/Kconfig"
1044 config CPU_FREQ_SA1100
1046 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1049 config CPU_FREQ_SA1110
1051 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1054 config CPU_FREQ_INTEGRATOR
1055 tristate "CPUfreq driver for ARM Integrator CPUs"
1056 depends on ARCH_INTEGRATOR && CPU_FREQ
1059 This enables the CPUfreq driver for ARM Integrator CPUs.
1061 For details, take a look at <file:Documentation/cpu-freq>.
1066 tristate "CPUfreq driver for i.MX CPUs"
1067 depends on ARCH_IMX && CPU_FREQ
1070 This enables the CPUfreq driver for i.MX CPUs.
1076 depends on CPU_FREQ && ARCH_PXA && PXA25x
1078 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1082 source "drivers/cpuidle/Kconfig"
1086 menu "Floating point emulation"
1088 comment "At least one emulation must be selected"
1091 bool "NWFPE math emulation"
1092 depends on !AEABI || OABI_COMPAT
1094 Say Y to include the NWFPE floating point emulator in the kernel.
1095 This is necessary to run most binaries. Linux does not currently
1096 support floating point hardware so you need to say Y here even if
1097 your machine has an FPA or floating point co-processor podule.
1099 You may say N here if you are going to load the Acorn FPEmulator
1100 early in the bootup.
1103 bool "Support extended precision"
1104 depends on FPE_NWFPE
1106 Say Y to include 80-bit support in the kernel floating-point
1107 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1108 Note that gcc does not generate 80-bit operations by default,
1109 so in most cases this option only enlarges the size of the
1110 floating point emulator without any good reason.
1112 You almost surely want to say N here.
1115 bool "FastFPE math emulation (EXPERIMENTAL)"
1116 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1118 Say Y here to include the FAST floating point emulator in the kernel.
1119 This is an experimental much faster emulator which now also has full
1120 precision for the mantissa. It does not support any exceptions.
1121 It is very simple, and approximately 3-6 times faster than NWFPE.
1123 It should be sufficient for most programs. It may be not suitable
1124 for scientific calculations, but you have to check this for yourself.
1125 If you do not feel you need a faster FP emulation you should better
1129 bool "VFP-format floating point maths"
1130 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1132 Say Y to include VFP support code in the kernel. This is needed
1133 if your hardware includes a VFP unit.
1135 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1136 release notes and additional status information.
1138 Say N if your target does not have VFP hardware.
1146 bool "Advanced SIMD (NEON) Extension support"
1147 depends on VFPv3 && CPU_V7
1149 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1154 menu "Userspace binary formats"
1156 source "fs/Kconfig.binfmt"
1159 tristate "RISC OS personality"
1162 Say Y here to include the kernel code necessary if you want to run
1163 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1164 experimental; if this sounds frightening, say N and sleep in peace.
1165 You can also say M here to compile this support as a module (which
1166 will be called arthur).
1170 menu "Power management options"
1172 source "kernel/power/Kconfig"
1174 config ARCH_SUSPEND_POSSIBLE
1179 source "net/Kconfig"
1181 menu "Device Drivers"
1183 source "drivers/base/Kconfig"
1185 source "drivers/connector/Kconfig"
1187 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1188 source "drivers/mtd/Kconfig"
1191 source "drivers/parport/Kconfig"
1193 source "drivers/pnp/Kconfig"
1195 source "drivers/block/Kconfig"
1197 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1199 source "drivers/misc/Kconfig"
1201 source "drivers/ide/Kconfig"
1203 source "drivers/scsi/Kconfig"
1205 source "drivers/ata/Kconfig"
1207 source "drivers/md/Kconfig"
1209 source "drivers/message/fusion/Kconfig"
1211 source "drivers/ieee1394/Kconfig"
1213 source "drivers/message/i2o/Kconfig"
1215 source "drivers/net/Kconfig"
1217 source "drivers/isdn/Kconfig"
1219 # input before char - char/joystick depends on it. As does USB.
1221 source "drivers/input/Kconfig"
1223 source "drivers/char/Kconfig"
1225 source "drivers/i2c/Kconfig"
1227 source "drivers/spi/Kconfig"
1229 source "drivers/gpio/Kconfig"
1231 source "drivers/w1/Kconfig"
1233 source "drivers/power/Kconfig"
1235 source "drivers/hwmon/Kconfig"
1237 source "drivers/thermal/Kconfig"
1239 source "drivers/watchdog/Kconfig"
1241 source "drivers/ssb/Kconfig"
1243 #source "drivers/l3/Kconfig"
1245 source "drivers/mfd/Kconfig"
1247 source "drivers/media/Kconfig"
1249 source "drivers/video/Kconfig"
1251 source "sound/Kconfig"
1253 source "drivers/hid/Kconfig"
1255 source "drivers/usb/Kconfig"
1257 source "drivers/mmc/Kconfig"
1259 source "drivers/memstick/Kconfig"
1261 source "drivers/accessibility/Kconfig"
1263 source "drivers/leds/Kconfig"
1265 source "drivers/rtc/Kconfig"
1267 source "drivers/dma/Kconfig"
1269 source "drivers/dca/Kconfig"
1271 source "drivers/auxdisplay/Kconfig"
1273 source "drivers/regulator/Kconfig"
1275 source "drivers/uio/Kconfig"
1281 source "arch/arm/Kconfig.debug"
1283 source "security/Kconfig"
1285 source "crypto/Kconfig"
1287 source "lib/Kconfig"