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_FUNCTION_TRACER if (!XIP_KERNEL)
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_MAY_HAVE_PC_FDC
149 config GENERIC_ISA_DMA
158 config GENERIC_HARDIRQS_NO__DO_IRQ
164 config OPROFILE_ARMV6
166 depends on CPU_V6 && !SMP
167 select OPROFILE_ARM11_CORE
169 config OPROFILE_MPCORE
171 depends on CPU_V6 && SMP
172 select OPROFILE_ARM11_CORE
174 config OPROFILE_ARM11_CORE
177 config OPROFILE_ARMV7
179 depends on CPU_V7 && !SMP
186 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
187 default DRAM_BASE if REMAP_VECTORS_TO_RAM
190 The base address of exception vectors.
192 source "init/Kconfig"
194 source "kernel/Kconfig.freezer"
199 prompt "ARM system type"
200 default ARCH_VERSATILE
203 bool "Agilent AAEC-2000 based"
208 This enables support for systems based on the Agilent AAEC-2000
210 config ARCH_INTEGRATOR
211 bool "ARM Ltd. Integrator family"
217 Support for ARM's Integrator platform.
220 bool "ARM Ltd. RealView family"
226 select GENERIC_CLOCKEVENTS
228 This enables support for ARM Ltd RealView boards.
230 config ARCH_VERSATILE
231 bool "ARM Ltd. Versatile family"
238 select GENERIC_CLOCKEVENTS
240 This enables support for ARM Ltd Versatile board.
247 This enables support for systems based on the Atmel AT91RM9200,
248 AT91SAM9 and AT91CAP9 processors.
251 bool "Cirrus Logic CLPS711x/EP721x-based"
254 Support for Cirrus Logic 711x/721x based boards.
262 This is an evaluation board for the StrongARM processor available
263 from Digital. It has limited hardware on-board, including an
264 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
284 Support for systems based on the DC21285 companion chip
285 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
288 bool "Hilscher NetX based"
292 This enables support for systems based on the Hilscher NetX Soc
295 bool "Hynix HMS720x-based"
299 This enables support for systems based on the Hynix HMS720x
306 select GENERIC_CLOCKEVENTS
308 Support for Motorola's i.MX family of processors (MX1, MXL).
316 select ARCH_SUPPORTS_MSI
319 Support for Intel's IOP13XX (XScale) family of processors.
328 select ARCH_REQUIRE_GPIOLIB
330 Support for Intel's 80219 and IOP32X (XScale) family of
340 select ARCH_REQUIRE_GPIOLIB
342 Support for Intel's IOP33X (XScale) family of processors.
350 Support for Intel's IXP23xx (XScale) family of processors.
353 bool "IXP2400/2800-based"
358 Support for Intel's IXP2400/2800 (XScale) family of processors.
366 select GENERIC_CLOCKEVENTS
367 select DMABOUNCE if PCI
369 Support for Intel's IXP4XX (XScale) family of processors.
376 Say Y here if you intend to run this kernel on a LinkUp Systems
377 L7200 Software Development Board which uses an ARM720T processor.
378 Information on this board can be obtained at:
380 <http://www.linkupsys.com/>
382 If you have any questions or comments about the Linux kernel port
383 to this board, send e-mail to <sjhill@cotw.com>.
386 bool "Marvell Kirkwood"
390 select GENERIC_CLOCKEVENTS
393 Support for the following Marvell Kirkwood series SoCs:
394 88F6180, 88F6192 and 88F6281.
397 bool "Micrel/Kendin KS8695"
401 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
402 System-on-Chip devices.
405 bool "NetSilicon NS9xxx"
409 select GENERIC_CLOCKEVENTS
412 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
415 <http://www.digi.com/products/microprocessors/index.jsp>
418 bool "Marvell Loki (88RC8480)"
421 select GENERIC_CLOCKEVENTS
424 Support for the Marvell Loki (88RC8480) SoC.
427 bool "Marvell MV78xx0"
431 select GENERIC_CLOCKEVENTS
434 Support for the following Marvell MV78xx0 series SoCs:
438 bool "Freescale MXC/iMX-based"
440 select GENERIC_CLOCKEVENTS
443 select ARCH_REQUIRE_GPIOLIB
445 Support for Freescale MXC/iMX-based family of processors
454 select GENERIC_CLOCKEVENTS
457 Support for the following Marvell Orion 5x series SoCs:
458 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
459 Orion-2 (5281), Orion-1-90 (6183).
462 bool "Philips Nexperia PNX4008 Mobile"
466 This enables support for Philips PNX4008 mobile platform.
469 bool "PXA2xx/PXA3xx-based"
475 select ARCH_REQUIRE_GPIOLIB
477 select GENERIC_CLOCKEVENTS
480 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
487 select ARCH_MAY_HAVE_PC_FDC
488 select HAVE_PATA_PLATFORM
491 select ARCH_SPARSEMEM_ENABLE
493 On the Acorn Risc-PC, Linux can support the internal IDE disk and
494 CD-ROM interface, serial and parallel port, and the floppy drive.
500 select ARCH_SPARSEMEM_ENABLE
504 select GENERIC_CLOCKEVENTS
507 select ARCH_REQUIRE_GPIOLIB
509 Support for StrongARM 11x0 based boards.
512 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
516 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
517 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
518 the Samsung SMDK2410 development board (and derivatives).
528 Support for the StrongARM based Digital DNARD machine, also known
529 as "Shark" (<http://www.shark-linux.de/shark.html>).
534 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
535 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
537 Say Y here for systems based on one of the Sharp LH7A40X
538 System on a Chip processors. These CPUs include an ARM922T
539 core with a wide array of integrated devices for
540 hand-held and low-power applications.
546 select GENERIC_CLOCKEVENTS
548 select ARCH_REQUIRE_GPIOLIB
552 Support for TI's DaVinci platform.
558 select ARCH_REQUIRE_GPIOLIB
560 select GENERIC_CLOCKEVENTS
562 Support for TI's OMAP platform (OMAP1 and OMAP2).
568 select GENERIC_CLOCKEVENTS
570 Support for Qualcomm MSM7K based systems. This runs on the ARM11
571 apps processor of the MSM7K and depends on a shared memory
572 interface to the ARM9 modem processor which runs the baseband stack
573 and controls some vital subsystems (clock and power control, etc).
576 bool "Nuvoton W90X900 CPU"
579 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
580 can login www.mcuos.com or www.nuvoton.com to know more.
584 source "arch/arm/mach-clps711x/Kconfig"
586 source "arch/arm/mach-ep93xx/Kconfig"
588 source "arch/arm/mach-footbridge/Kconfig"
590 source "arch/arm/mach-integrator/Kconfig"
592 source "arch/arm/mach-iop32x/Kconfig"
594 source "arch/arm/mach-iop33x/Kconfig"
596 source "arch/arm/mach-iop13xx/Kconfig"
598 source "arch/arm/mach-ixp4xx/Kconfig"
600 source "arch/arm/mach-ixp2000/Kconfig"
602 source "arch/arm/mach-ixp23xx/Kconfig"
604 source "arch/arm/mach-loki/Kconfig"
606 source "arch/arm/mach-mv78xx0/Kconfig"
608 source "arch/arm/mach-pxa/Kconfig"
610 source "arch/arm/mach-sa1100/Kconfig"
612 source "arch/arm/plat-omap/Kconfig"
614 source "arch/arm/mach-omap1/Kconfig"
616 source "arch/arm/mach-omap2/Kconfig"
618 source "arch/arm/mach-orion5x/Kconfig"
620 source "arch/arm/mach-kirkwood/Kconfig"
622 source "arch/arm/plat-s3c24xx/Kconfig"
623 source "arch/arm/plat-s3c/Kconfig"
626 source "arch/arm/mach-s3c2400/Kconfig"
627 source "arch/arm/mach-s3c2410/Kconfig"
628 source "arch/arm/mach-s3c2412/Kconfig"
629 source "arch/arm/mach-s3c2440/Kconfig"
630 source "arch/arm/mach-s3c2442/Kconfig"
631 source "arch/arm/mach-s3c2443/Kconfig"
634 source "arch/arm/mach-lh7a40x/Kconfig"
636 source "arch/arm/mach-imx/Kconfig"
638 source "arch/arm/mach-h720x/Kconfig"
640 source "arch/arm/mach-versatile/Kconfig"
642 source "arch/arm/mach-aaec2000/Kconfig"
644 source "arch/arm/mach-realview/Kconfig"
646 source "arch/arm/mach-at91/Kconfig"
648 source "arch/arm/plat-mxc/Kconfig"
650 source "arch/arm/mach-netx/Kconfig"
652 source "arch/arm/mach-ns9xxx/Kconfig"
654 source "arch/arm/mach-davinci/Kconfig"
656 source "arch/arm/mach-ks8695/Kconfig"
658 source "arch/arm/mach-msm/Kconfig"
660 source "arch/arm/mach-w90x900/Kconfig"
662 # Definitions to make life easier
672 source arch/arm/mm/Kconfig
675 bool "Enable iWMMXt support"
676 depends on CPU_XSCALE || CPU_XSC3
677 default y if PXA27x || PXA3xx
679 Enable support for iWMMXt context switching at run time if
680 running on a CPU that supports it.
682 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
685 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
689 source "arch/arm/Kconfig-nommu"
694 source "arch/arm/common/Kconfig"
696 config FORCE_MAX_ZONEORDER
709 Find out whether you have ISA slots on your motherboard. ISA is the
710 name of a bus system, i.e. the way the CPU talks to the other stuff
711 inside your box. Other bus systems are PCI, EISA, MicroChannel
712 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
713 newer boards don't support it. If you have ISA, say Y, otherwise N.
715 # Select ISA DMA controller support
720 # Select ISA DMA interface
725 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
727 Find out whether you have a PCI motherboard. PCI is the name of a
728 bus system, i.e. the way the CPU talks to the other stuff inside
729 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
730 VESA. If you have PCI, say Y, otherwise N.
735 # Select the host bridge type
736 config PCI_HOST_VIA82C505
738 depends on PCI && ARCH_SHARK
741 config PCI_HOST_ITE8152
743 depends on PCI && MACH_ARMCORE
747 source "drivers/pci/Kconfig"
749 source "drivers/pcmcia/Kconfig"
753 menu "Kernel Features"
755 source "kernel/time/Kconfig"
758 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
759 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
760 select USE_GENERIC_SMP_HELPERS
762 This enables support for systems with more than one CPU. If you have
763 a system with only one CPU, like most personal computers, say N. If
764 you have a system with more than one CPU, say Y.
766 If you say N here, the kernel will run on single and multiprocessor
767 machines, but will use only one CPU of a multiprocessor machine. If
768 you say Y here, the kernel will run on many, but not all, single
769 processor machines. On a single processor machine, the kernel will
770 run faster if you say N here.
772 See also <file:Documentation/i386/IO-APIC.txt>,
773 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
774 <http://www.linuxdoc.org/docs.html#howto>.
776 If you don't know what to do here, say N.
779 prompt "Memory split"
782 Select the desired split between kernel and user memory.
784 If you are not absolutely sure what you are doing, leave this
788 bool "3G/1G user/kernel split"
790 bool "2G/2G user/kernel split"
792 bool "1G/3G user/kernel split"
797 default 0x40000000 if VMSPLIT_1G
798 default 0x80000000 if VMSPLIT_2G
802 int "Maximum number of CPUs (2-32)"
808 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
809 depends on SMP && HOTPLUG && EXPERIMENTAL
811 Say Y here to experiment with turning CPUs off and on. CPUs
812 can be controlled through /sys/devices/system/cpu.
815 bool "Use local timer interrupts"
816 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
819 Enable support for local timers on SMP platforms, rather then the
820 legacy IPI broadcast method. Local timers allows the system
821 accounting to be spread across the timer interval, preventing a
822 "thundering herd" at every timer tick.
825 bool "Preemptible Kernel (EXPERIMENTAL)"
826 depends on EXPERIMENTAL
828 This option reduces the latency of the kernel when reacting to
829 real-time or interactive events by allowing a low priority process to
830 be preempted even if it is in kernel mode executing a system call.
831 This allows applications to run more reliably even when the system is
834 Say Y here if you are building a kernel for a desktop, embedded
835 or real-time system. Say N if you are unsure.
839 default 128 if ARCH_L7200
840 default 200 if ARCH_EBSA110 || ARCH_S3C2410
841 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
842 default AT91_TIMER_HZ if ARCH_AT91
846 bool "Use the ARM EABI to compile the kernel"
848 This option allows for the kernel to be compiled using the latest
849 ARM ABI (aka EABI). This is only useful if you are using a user
850 space environment that is also compiled with EABI.
852 Since there are major incompatibilities between the legacy ABI and
853 EABI, especially with regard to structure member alignment, this
854 option also changes the kernel syscall calling convention to
855 disambiguate both ABIs and allow for backward compatibility support
856 (selected with CONFIG_OABI_COMPAT).
858 To use this you need GCC version 4.0.0 or later.
861 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
862 depends on AEABI && EXPERIMENTAL
865 This option preserves the old syscall interface along with the
866 new (ARM EABI) one. It also provides a compatibility layer to
867 intercept syscalls that have structure arguments which layout
868 in memory differs between the legacy ABI and the new ARM EABI
869 (only for non "thumb" binaries). This option adds a tiny
870 overhead to all syscalls and produces a slightly larger kernel.
871 If you know you'll be using only pure EABI user space then you
872 can say N here. If this option is not selected and you attempt
873 to execute a legacy ABI binary then the result will be
874 UNPREDICTABLE (in fact it can be predicted that it won't work
875 at all). If in doubt say Y.
877 config ARCH_FLATMEM_HAS_HOLES
882 # Discontigmem is deprecated
883 config ARCH_DISCONTIGMEM_ENABLE
886 config ARCH_SPARSEMEM_ENABLE
889 config ARCH_SPARSEMEM_DEFAULT
890 def_bool ARCH_SPARSEMEM_ENABLE
892 config ARCH_SELECT_MEMORY_MODEL
893 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
897 default "4" if ARCH_LH7A40X
899 depends on NEED_MULTIPLE_NODES
904 bool "Timer and CPU usage LEDs"
905 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
906 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
907 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
908 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
909 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
910 ARCH_AT91 || ARCH_DAVINCI || \
911 ARCH_KS8695 || MACH_RD88F5182
913 If you say Y here, the LEDs on your machine will be used
914 to provide useful information about your current system status.
916 If you are compiling a kernel for a NetWinder or EBSA-285, you will
917 be able to select which LEDs are active using the options below. If
918 you are compiling a kernel for the EBSA-110 or the LART however, the
919 red LED will simply flash regularly to indicate that the system is
920 still functional. It is safe to say Y here if you have a CATS
921 system, but the driver will do nothing.
924 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
925 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
926 || MACH_OMAP_PERSEUS2
928 depends on !GENERIC_CLOCKEVENTS
929 default y if ARCH_EBSA110
931 If you say Y here, one of the system LEDs (the green one on the
932 NetWinder, the amber one on the EBSA285, or the red one on the LART)
933 will flash regularly to indicate that the system is still
934 operational. This is mainly useful to kernel hackers who are
935 debugging unstable kernels.
937 The LART uses the same LED for both Timer LED and CPU usage LED
938 functions. You may choose to use both, but the Timer LED function
939 will overrule the CPU usage LED.
942 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
944 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
945 || MACH_OMAP_PERSEUS2
948 If you say Y here, the red LED will be used to give a good real
949 time indication of CPU usage, by lighting whenever the idle task
950 is not currently executing.
952 The LART uses the same LED for both Timer LED and CPU usage LED
953 functions. You may choose to use both, but the Timer LED function
954 will overrule the CPU usage LED.
956 config ALIGNMENT_TRAP
958 depends on CPU_CP15_MMU
959 default y if !ARCH_EBSA110
961 ARM processors cannot fetch/store information which is not
962 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
963 address divisible by 4. On 32-bit ARM processors, these non-aligned
964 fetch/store instructions will be emulated in software if you say
965 here, which has a severe performance impact. This is necessary for
966 correct operation of some network protocols. With an IP-only
967 configuration it is safe to say N, otherwise say Y.
973 # Compressed boot loader in ROM. Yes, we really want to ask about
974 # TEXT and BSS so we preserve their values in the config files.
975 config ZBOOT_ROM_TEXT
976 hex "Compressed ROM boot loader base address"
979 The physical address at which the ROM-able zImage is to be
980 placed in the target. Platforms which normally make use of
981 ROM-able zImage formats normally set this to a suitable
982 value in their defconfig file.
984 If ZBOOT_ROM is not enabled, this has no effect.
987 hex "Compressed ROM boot loader BSS address"
990 The base address of an area of read/write memory in the target
991 for the ROM-able zImage which must be available while the
992 decompressor is running. It must be large enough to hold the
993 entire decompressed kernel plus an additional 128 KiB.
994 Platforms which normally make use of ROM-able zImage formats
995 normally set this to a suitable value in their defconfig file.
997 If ZBOOT_ROM is not enabled, this has no effect.
1000 bool "Compressed boot loader in ROM/flash"
1001 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1003 Say Y here if you intend to execute your compressed kernel image
1004 (zImage) directly from ROM or flash. If unsure, say N.
1007 string "Default kernel command string"
1010 On some architectures (EBSA110 and CATS), there is currently no way
1011 for the boot loader to pass arguments to the kernel. For these
1012 architectures, you should supply some command-line options at build
1013 time by entering them here. As a minimum, you should specify the
1014 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1017 bool "Kernel Execute-In-Place from ROM"
1018 depends on !ZBOOT_ROM
1020 Execute-In-Place allows the kernel to run from non-volatile storage
1021 directly addressable by the CPU, such as NOR flash. This saves RAM
1022 space since the text section of the kernel is not loaded from flash
1023 to RAM. Read-write sections, such as the data section and stack,
1024 are still copied to RAM. The XIP kernel is not compressed since
1025 it has to run directly from flash, so it will take more space to
1026 store it. The flash address used to link the kernel object files,
1027 and for storing it, is configuration dependent. Therefore, if you
1028 say Y here, you must know the proper physical address where to
1029 store the kernel image depending on your own flash memory usage.
1031 Also note that the make target becomes "make xipImage" rather than
1032 "make zImage" or "make Image". The final kernel binary to put in
1033 ROM memory will be arch/arm/boot/xipImage.
1037 config XIP_PHYS_ADDR
1038 hex "XIP Kernel Physical Location"
1039 depends on XIP_KERNEL
1040 default "0x00080000"
1042 This is the physical address in your flash memory the kernel will
1043 be linked for and stored to. This address is dependent on your
1047 bool "Kexec system call (EXPERIMENTAL)"
1048 depends on EXPERIMENTAL
1050 kexec is a system call that implements the ability to shutdown your
1051 current kernel, and to start another kernel. It is like a reboot
1052 but it is independent of the system firmware. And like a reboot
1053 you can start any kernel with it, not just Linux.
1055 It is an ongoing process to be certain the hardware in a machine
1056 is properly shutdown, so do not be surprised if this code does not
1057 initially work for you. It may help to enable device hotplugging
1061 bool "Export atags in procfs"
1065 Should the atags used to boot the kernel be exported in an "atags"
1066 file in procfs. Useful with kexec.
1070 menu "CPU Power Management"
1072 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1074 source "drivers/cpufreq/Kconfig"
1076 config CPU_FREQ_SA1100
1078 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1081 config CPU_FREQ_SA1110
1083 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1086 config CPU_FREQ_INTEGRATOR
1087 tristate "CPUfreq driver for ARM Integrator CPUs"
1088 depends on ARCH_INTEGRATOR && CPU_FREQ
1091 This enables the CPUfreq driver for ARM Integrator CPUs.
1093 For details, take a look at <file:Documentation/cpu-freq>.
1098 tristate "CPUfreq driver for i.MX CPUs"
1099 depends on ARCH_IMX && CPU_FREQ
1102 This enables the CPUfreq driver for i.MX CPUs.
1108 depends on CPU_FREQ && ARCH_PXA && PXA25x
1110 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1114 source "drivers/cpuidle/Kconfig"
1118 menu "Floating point emulation"
1120 comment "At least one emulation must be selected"
1123 bool "NWFPE math emulation"
1124 depends on !AEABI || OABI_COMPAT
1126 Say Y to include the NWFPE floating point emulator in the kernel.
1127 This is necessary to run most binaries. Linux does not currently
1128 support floating point hardware so you need to say Y here even if
1129 your machine has an FPA or floating point co-processor podule.
1131 You may say N here if you are going to load the Acorn FPEmulator
1132 early in the bootup.
1135 bool "Support extended precision"
1136 depends on FPE_NWFPE
1138 Say Y to include 80-bit support in the kernel floating-point
1139 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1140 Note that gcc does not generate 80-bit operations by default,
1141 so in most cases this option only enlarges the size of the
1142 floating point emulator without any good reason.
1144 You almost surely want to say N here.
1147 bool "FastFPE math emulation (EXPERIMENTAL)"
1148 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1150 Say Y here to include the FAST floating point emulator in the kernel.
1151 This is an experimental much faster emulator which now also has full
1152 precision for the mantissa. It does not support any exceptions.
1153 It is very simple, and approximately 3-6 times faster than NWFPE.
1155 It should be sufficient for most programs. It may be not suitable
1156 for scientific calculations, but you have to check this for yourself.
1157 If you do not feel you need a faster FP emulation you should better
1161 bool "VFP-format floating point maths"
1162 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1164 Say Y to include VFP support code in the kernel. This is needed
1165 if your hardware includes a VFP unit.
1167 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1168 release notes and additional status information.
1170 Say N if your target does not have VFP hardware.
1178 bool "Advanced SIMD (NEON) Extension support"
1179 depends on VFPv3 && CPU_V7
1181 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1186 menu "Userspace binary formats"
1188 source "fs/Kconfig.binfmt"
1191 tristate "RISC OS personality"
1194 Say Y here to include the kernel code necessary if you want to run
1195 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1196 experimental; if this sounds frightening, say N and sleep in peace.
1197 You can also say M here to compile this support as a module (which
1198 will be called arthur).
1202 menu "Power management options"
1204 source "kernel/power/Kconfig"
1206 config ARCH_SUSPEND_POSSIBLE
1211 source "net/Kconfig"
1213 menu "Device Drivers"
1215 source "drivers/base/Kconfig"
1217 source "drivers/connector/Kconfig"
1219 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1220 source "drivers/mtd/Kconfig"
1223 source "drivers/parport/Kconfig"
1225 source "drivers/pnp/Kconfig"
1227 source "drivers/block/Kconfig"
1229 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1231 source "drivers/misc/Kconfig"
1233 source "drivers/ide/Kconfig"
1235 source "drivers/scsi/Kconfig"
1237 source "drivers/ata/Kconfig"
1239 source "drivers/md/Kconfig"
1241 source "drivers/message/fusion/Kconfig"
1243 source "drivers/ieee1394/Kconfig"
1245 source "drivers/message/i2o/Kconfig"
1247 source "drivers/net/Kconfig"
1249 source "drivers/isdn/Kconfig"
1251 # input before char - char/joystick depends on it. As does USB.
1253 source "drivers/input/Kconfig"
1255 source "drivers/char/Kconfig"
1257 source "drivers/i2c/Kconfig"
1259 source "drivers/spi/Kconfig"
1261 source "drivers/gpio/Kconfig"
1263 source "drivers/w1/Kconfig"
1265 source "drivers/power/Kconfig"
1267 source "drivers/hwmon/Kconfig"
1269 source "drivers/thermal/Kconfig"
1271 source "drivers/watchdog/Kconfig"
1273 source "drivers/ssb/Kconfig"
1275 #source "drivers/l3/Kconfig"
1277 source "drivers/mfd/Kconfig"
1279 source "drivers/media/Kconfig"
1281 source "drivers/video/Kconfig"
1283 source "sound/Kconfig"
1285 source "drivers/hid/Kconfig"
1287 source "drivers/usb/Kconfig"
1289 source "drivers/uwb/Kconfig"
1291 source "drivers/mmc/Kconfig"
1293 source "drivers/memstick/Kconfig"
1295 source "drivers/accessibility/Kconfig"
1297 source "drivers/leds/Kconfig"
1299 source "drivers/rtc/Kconfig"
1301 source "drivers/dma/Kconfig"
1303 source "drivers/dca/Kconfig"
1305 source "drivers/auxdisplay/Kconfig"
1307 source "drivers/regulator/Kconfig"
1309 source "drivers/uio/Kconfig"
1315 source "arch/arm/Kconfig.debug"
1317 source "security/Kconfig"
1319 source "crypto/Kconfig"
1321 source "lib/Kconfig"