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
163 config OPROFILE_ARMV6
165 depends on CPU_V6 && !SMP
166 select OPROFILE_ARM11_CORE
168 config OPROFILE_MPCORE
170 depends on CPU_V6 && SMP
171 select OPROFILE_ARM11_CORE
173 config OPROFILE_ARM11_CORE
176 config OPROFILE_ARMV7
178 depends on CPU_V7 && !SMP
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"
193 source "kernel/Kconfig.freezer"
198 prompt "ARM system type"
199 default ARCH_VERSATILE
202 bool "Agilent AAEC-2000 based"
207 This enables support for systems based on the Agilent AAEC-2000
209 config ARCH_INTEGRATOR
210 bool "ARM Ltd. Integrator family"
216 Support for ARM's Integrator platform.
219 bool "ARM Ltd. RealView family"
225 select GENERIC_CLOCKEVENTS
227 This enables support for ARM Ltd RealView boards.
229 config ARCH_VERSATILE
230 bool "ARM Ltd. Versatile family"
237 select GENERIC_CLOCKEVENTS
239 This enables support for ARM Ltd Versatile board.
244 select ARCH_REQUIRE_GPIOLIB
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"
291 select GENERIC_CLOCKEVENTS
294 This enables support for systems based on the Hilscher NetX Soc
297 bool "Hynix HMS720x-based"
301 This enables support for systems based on the Hynix HMS720x
308 select GENERIC_CLOCKEVENTS
310 Support for Motorola's i.MX family of processors (MX1, MXL).
318 select ARCH_SUPPORTS_MSI
321 Support for Intel's IOP13XX (XScale) family of processors.
330 select ARCH_REQUIRE_GPIOLIB
332 Support for Intel's 80219 and IOP32X (XScale) family of
342 select ARCH_REQUIRE_GPIOLIB
344 Support for Intel's IOP33X (XScale) family of processors.
352 Support for Intel's IXP23xx (XScale) family of processors.
355 bool "IXP2400/2800-based"
360 Support for Intel's IXP2400/2800 (XScale) family of processors.
368 select GENERIC_CLOCKEVENTS
369 select DMABOUNCE if PCI
371 Support for Intel's IXP4XX (XScale) family of processors.
378 Say Y here if you intend to run this kernel on a LinkUp Systems
379 L7200 Software Development Board which uses an ARM720T processor.
380 Information on this board can be obtained at:
382 <http://www.linkupsys.com/>
384 If you have any questions or comments about the Linux kernel port
385 to this board, send e-mail to <sjhill@cotw.com>.
388 bool "Marvell Kirkwood"
393 select GENERIC_CLOCKEVENTS
396 Support for the following Marvell Kirkwood series SoCs:
397 88F6180, 88F6192 and 88F6281.
400 bool "Micrel/Kendin KS8695"
403 select ARCH_REQUIRE_GPIOLIB
405 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
406 System-on-Chip devices.
409 bool "NetSilicon NS9xxx"
413 select GENERIC_CLOCKEVENTS
416 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
419 <http://www.digi.com/products/microprocessors/index.jsp>
422 bool "Marvell Loki (88RC8480)"
425 select GENERIC_CLOCKEVENTS
428 Support for the Marvell Loki (88RC8480) SoC.
431 bool "Marvell MV78xx0"
436 select GENERIC_CLOCKEVENTS
439 Support for the following Marvell MV78xx0 series SoCs:
443 bool "Freescale MXC/iMX-based"
445 select GENERIC_CLOCKEVENTS
448 select ARCH_REQUIRE_GPIOLIB
450 Support for Freescale MXC/iMX-based family of processors
459 select GENERIC_CLOCKEVENTS
462 Support for the following Marvell Orion 5x series SoCs:
463 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
464 Orion-2 (5281), Orion-1-90 (6183).
467 bool "Philips Nexperia PNX4008 Mobile"
471 This enables support for Philips PNX4008 mobile platform.
474 bool "PXA2xx/PXA3xx-based"
480 select ARCH_REQUIRE_GPIOLIB
482 select GENERIC_CLOCKEVENTS
486 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
493 select ARCH_MAY_HAVE_PC_FDC
494 select HAVE_PATA_PLATFORM
497 select ARCH_SPARSEMEM_ENABLE
499 On the Acorn Risc-PC, Linux can support the internal IDE disk and
500 CD-ROM interface, serial and parallel port, and the floppy drive.
506 select ARCH_SPARSEMEM_ENABLE
510 select GENERIC_CLOCKEVENTS
513 select ARCH_REQUIRE_GPIOLIB
515 Support for StrongARM 11x0 based boards.
518 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
522 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
523 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
524 the Samsung SMDK2410 development board (and derivatives).
527 bool "Samsung S3C64XX"
531 Samsung S3C64XX series based systems
541 Support for the StrongARM based Digital DNARD machine, also known
542 as "Shark" (<http://www.shark-linux.de/shark.html>).
547 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
548 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
550 Say Y here for systems based on one of the Sharp LH7A40X
551 System on a Chip processors. These CPUs include an ARM922T
552 core with a wide array of integrated devices for
553 hand-held and low-power applications.
559 select GENERIC_CLOCKEVENTS
561 select ARCH_REQUIRE_GPIOLIB
565 Support for TI's DaVinci platform.
571 select ARCH_REQUIRE_GPIOLIB
573 select GENERIC_CLOCKEVENTS
575 Support for TI's OMAP platform (OMAP1 and OMAP2).
581 select GENERIC_CLOCKEVENTS
583 Support for Qualcomm MSM7K based systems. This runs on the ARM11
584 apps processor of the MSM7K and depends on a shared memory
585 interface to the ARM9 modem processor which runs the baseband stack
586 and controls some vital subsystems (clock and power control, etc).
589 bool "Nuvoton W90X900 CPU"
592 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
593 can login www.mcuos.com or www.nuvoton.com to know more.
597 source "arch/arm/mach-clps711x/Kconfig"
599 source "arch/arm/mach-ep93xx/Kconfig"
601 source "arch/arm/mach-footbridge/Kconfig"
603 source "arch/arm/mach-integrator/Kconfig"
605 source "arch/arm/mach-iop32x/Kconfig"
607 source "arch/arm/mach-iop33x/Kconfig"
609 source "arch/arm/mach-iop13xx/Kconfig"
611 source "arch/arm/mach-ixp4xx/Kconfig"
613 source "arch/arm/mach-ixp2000/Kconfig"
615 source "arch/arm/mach-ixp23xx/Kconfig"
617 source "arch/arm/mach-loki/Kconfig"
619 source "arch/arm/mach-mv78xx0/Kconfig"
621 source "arch/arm/mach-pxa/Kconfig"
622 source "arch/arm/plat-pxa/Kconfig"
624 source "arch/arm/mach-sa1100/Kconfig"
626 source "arch/arm/plat-omap/Kconfig"
628 source "arch/arm/mach-omap1/Kconfig"
630 source "arch/arm/mach-omap2/Kconfig"
632 source "arch/arm/mach-orion5x/Kconfig"
634 source "arch/arm/mach-kirkwood/Kconfig"
636 source "arch/arm/plat-s3c24xx/Kconfig"
637 source "arch/arm/plat-s3c64xx/Kconfig"
638 source "arch/arm/plat-s3c/Kconfig"
641 source "arch/arm/mach-s3c2400/Kconfig"
642 source "arch/arm/mach-s3c2410/Kconfig"
643 source "arch/arm/mach-s3c2412/Kconfig"
644 source "arch/arm/mach-s3c2440/Kconfig"
645 source "arch/arm/mach-s3c2442/Kconfig"
646 source "arch/arm/mach-s3c2443/Kconfig"
650 source "arch/arm/mach-s3c6400/Kconfig"
651 source "arch/arm/mach-s3c6410/Kconfig"
654 source "arch/arm/mach-lh7a40x/Kconfig"
656 source "arch/arm/mach-imx/Kconfig"
658 source "arch/arm/mach-h720x/Kconfig"
660 source "arch/arm/mach-versatile/Kconfig"
662 source "arch/arm/mach-aaec2000/Kconfig"
664 source "arch/arm/mach-realview/Kconfig"
666 source "arch/arm/mach-at91/Kconfig"
668 source "arch/arm/plat-mxc/Kconfig"
670 source "arch/arm/mach-netx/Kconfig"
672 source "arch/arm/mach-ns9xxx/Kconfig"
674 source "arch/arm/mach-davinci/Kconfig"
676 source "arch/arm/mach-ks8695/Kconfig"
678 source "arch/arm/mach-msm/Kconfig"
680 source "arch/arm/mach-w90x900/Kconfig"
682 # Definitions to make life easier
695 source arch/arm/mm/Kconfig
698 bool "Enable iWMMXt support"
699 depends on CPU_XSCALE || CPU_XSC3
700 default y if PXA27x || PXA3xx
702 Enable support for iWMMXt context switching at run time if
703 running on a CPU that supports it.
705 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
708 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
712 source "arch/arm/Kconfig-nommu"
717 source "arch/arm/common/Kconfig"
719 config FORCE_MAX_ZONEORDER
732 Find out whether you have ISA slots on your motherboard. ISA is the
733 name of a bus system, i.e. the way the CPU talks to the other stuff
734 inside your box. Other bus systems are PCI, EISA, MicroChannel
735 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
736 newer boards don't support it. If you have ISA, say Y, otherwise N.
738 # Select ISA DMA controller support
743 # Select ISA DMA interface
748 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
750 Find out whether you have a PCI motherboard. PCI is the name of a
751 bus system, i.e. the way the CPU talks to the other stuff inside
752 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
753 VESA. If you have PCI, say Y, otherwise N.
758 # Select the host bridge type
759 config PCI_HOST_VIA82C505
761 depends on PCI && ARCH_SHARK
764 config PCI_HOST_ITE8152
766 depends on PCI && MACH_ARMCORE
770 source "drivers/pci/Kconfig"
772 source "drivers/pcmcia/Kconfig"
776 menu "Kernel Features"
778 source "kernel/time/Kconfig"
781 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
782 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
783 select USE_GENERIC_SMP_HELPERS
785 This enables support for systems with more than one CPU. If you have
786 a system with only one CPU, like most personal computers, say N. If
787 you have a system with more than one CPU, say Y.
789 If you say N here, the kernel will run on single and multiprocessor
790 machines, but will use only one CPU of a multiprocessor machine. If
791 you say Y here, the kernel will run on many, but not all, single
792 processor machines. On a single processor machine, the kernel will
793 run faster if you say N here.
795 See also <file:Documentation/i386/IO-APIC.txt>,
796 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
797 <http://www.linuxdoc.org/docs.html#howto>.
799 If you don't know what to do here, say N.
802 prompt "Memory split"
805 Select the desired split between kernel and user memory.
807 If you are not absolutely sure what you are doing, leave this
811 bool "3G/1G user/kernel split"
813 bool "2G/2G user/kernel split"
815 bool "1G/3G user/kernel split"
820 default 0x40000000 if VMSPLIT_1G
821 default 0x80000000 if VMSPLIT_2G
825 int "Maximum number of CPUs (2-32)"
831 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
832 depends on SMP && HOTPLUG && EXPERIMENTAL
834 Say Y here to experiment with turning CPUs off and on. CPUs
835 can be controlled through /sys/devices/system/cpu.
838 bool "Use local timer interrupts"
839 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
842 Enable support for local timers on SMP platforms, rather then the
843 legacy IPI broadcast method. Local timers allows the system
844 accounting to be spread across the timer interval, preventing a
845 "thundering herd" at every timer tick.
848 bool "Preemptible Kernel (EXPERIMENTAL)"
849 depends on EXPERIMENTAL
851 This option reduces the latency of the kernel when reacting to
852 real-time or interactive events by allowing a low priority process to
853 be preempted even if it is in kernel mode executing a system call.
854 This allows applications to run more reliably even when the system is
857 Say Y here if you are building a kernel for a desktop, embedded
858 or real-time system. Say N if you are unsure.
862 default 128 if ARCH_L7200
863 default 200 if ARCH_EBSA110 || ARCH_S3C2410
864 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
865 default AT91_TIMER_HZ if ARCH_AT91
869 bool "Use the ARM EABI to compile the kernel"
871 This option allows for the kernel to be compiled using the latest
872 ARM ABI (aka EABI). This is only useful if you are using a user
873 space environment that is also compiled with EABI.
875 Since there are major incompatibilities between the legacy ABI and
876 EABI, especially with regard to structure member alignment, this
877 option also changes the kernel syscall calling convention to
878 disambiguate both ABIs and allow for backward compatibility support
879 (selected with CONFIG_OABI_COMPAT).
881 To use this you need GCC version 4.0.0 or later.
884 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
885 depends on AEABI && EXPERIMENTAL
888 This option preserves the old syscall interface along with the
889 new (ARM EABI) one. It also provides a compatibility layer to
890 intercept syscalls that have structure arguments which layout
891 in memory differs between the legacy ABI and the new ARM EABI
892 (only for non "thumb" binaries). This option adds a tiny
893 overhead to all syscalls and produces a slightly larger kernel.
894 If you know you'll be using only pure EABI user space then you
895 can say N here. If this option is not selected and you attempt
896 to execute a legacy ABI binary then the result will be
897 UNPREDICTABLE (in fact it can be predicted that it won't work
898 at all). If in doubt say Y.
900 config ARCH_FLATMEM_HAS_HOLES
905 # Discontigmem is deprecated
906 config ARCH_DISCONTIGMEM_ENABLE
909 config ARCH_SPARSEMEM_ENABLE
912 config ARCH_SPARSEMEM_DEFAULT
913 def_bool ARCH_SPARSEMEM_ENABLE
915 config ARCH_SELECT_MEMORY_MODEL
916 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
920 default "4" if ARCH_LH7A40X
922 depends on NEED_MULTIPLE_NODES
927 bool "Timer and CPU usage LEDs"
928 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
929 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
930 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
931 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
932 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
933 ARCH_AT91 || ARCH_DAVINCI || \
934 ARCH_KS8695 || MACH_RD88F5182
936 If you say Y here, the LEDs on your machine will be used
937 to provide useful information about your current system status.
939 If you are compiling a kernel for a NetWinder or EBSA-285, you will
940 be able to select which LEDs are active using the options below. If
941 you are compiling a kernel for the EBSA-110 or the LART however, the
942 red LED will simply flash regularly to indicate that the system is
943 still functional. It is safe to say Y here if you have a CATS
944 system, but the driver will do nothing.
947 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
948 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
949 || MACH_OMAP_PERSEUS2
951 depends on !GENERIC_CLOCKEVENTS
952 default y if ARCH_EBSA110
954 If you say Y here, one of the system LEDs (the green one on the
955 NetWinder, the amber one on the EBSA285, or the red one on the LART)
956 will flash regularly to indicate that the system is still
957 operational. This is mainly useful to kernel hackers who are
958 debugging unstable kernels.
960 The LART uses the same LED for both Timer LED and CPU usage LED
961 functions. You may choose to use both, but the Timer LED function
962 will overrule the CPU usage LED.
965 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
967 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
968 || MACH_OMAP_PERSEUS2
971 If you say Y here, the red LED will be used to give a good real
972 time indication of CPU usage, by lighting whenever the idle task
973 is not currently executing.
975 The LART uses the same LED for both Timer LED and CPU usage LED
976 functions. You may choose to use both, but the Timer LED function
977 will overrule the CPU usage LED.
979 config ALIGNMENT_TRAP
981 depends on CPU_CP15_MMU
982 default y if !ARCH_EBSA110
984 ARM processors cannot fetch/store information which is not
985 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
986 address divisible by 4. On 32-bit ARM processors, these non-aligned
987 fetch/store instructions will be emulated in software if you say
988 here, which has a severe performance impact. This is necessary for
989 correct operation of some network protocols. With an IP-only
990 configuration it is safe to say N, otherwise say Y.
996 # Compressed boot loader in ROM. Yes, we really want to ask about
997 # TEXT and BSS so we preserve their values in the config files.
998 config ZBOOT_ROM_TEXT
999 hex "Compressed ROM boot loader base address"
1002 The physical address at which the ROM-able zImage is to be
1003 placed in the target. Platforms which normally make use of
1004 ROM-able zImage formats normally set this to a suitable
1005 value in their defconfig file.
1007 If ZBOOT_ROM is not enabled, this has no effect.
1009 config ZBOOT_ROM_BSS
1010 hex "Compressed ROM boot loader BSS address"
1013 The base address of an area of read/write memory in the target
1014 for the ROM-able zImage which must be available while the
1015 decompressor is running. It must be large enough to hold the
1016 entire decompressed kernel plus an additional 128 KiB.
1017 Platforms which normally make use of ROM-able zImage formats
1018 normally set this to a suitable value in their defconfig file.
1020 If ZBOOT_ROM is not enabled, this has no effect.
1023 bool "Compressed boot loader in ROM/flash"
1024 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1026 Say Y here if you intend to execute your compressed kernel image
1027 (zImage) directly from ROM or flash. If unsure, say N.
1030 string "Default kernel command string"
1033 On some architectures (EBSA110 and CATS), there is currently no way
1034 for the boot loader to pass arguments to the kernel. For these
1035 architectures, you should supply some command-line options at build
1036 time by entering them here. As a minimum, you should specify the
1037 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1040 bool "Kernel Execute-In-Place from ROM"
1041 depends on !ZBOOT_ROM
1043 Execute-In-Place allows the kernel to run from non-volatile storage
1044 directly addressable by the CPU, such as NOR flash. This saves RAM
1045 space since the text section of the kernel is not loaded from flash
1046 to RAM. Read-write sections, such as the data section and stack,
1047 are still copied to RAM. The XIP kernel is not compressed since
1048 it has to run directly from flash, so it will take more space to
1049 store it. The flash address used to link the kernel object files,
1050 and for storing it, is configuration dependent. Therefore, if you
1051 say Y here, you must know the proper physical address where to
1052 store the kernel image depending on your own flash memory usage.
1054 Also note that the make target becomes "make xipImage" rather than
1055 "make zImage" or "make Image". The final kernel binary to put in
1056 ROM memory will be arch/arm/boot/xipImage.
1060 config XIP_PHYS_ADDR
1061 hex "XIP Kernel Physical Location"
1062 depends on XIP_KERNEL
1063 default "0x00080000"
1065 This is the physical address in your flash memory the kernel will
1066 be linked for and stored to. This address is dependent on your
1070 bool "Kexec system call (EXPERIMENTAL)"
1071 depends on EXPERIMENTAL
1073 kexec is a system call that implements the ability to shutdown your
1074 current kernel, and to start another kernel. It is like a reboot
1075 but it is independent of the system firmware. And like a reboot
1076 you can start any kernel with it, not just Linux.
1078 It is an ongoing process to be certain the hardware in a machine
1079 is properly shutdown, so do not be surprised if this code does not
1080 initially work for you. It may help to enable device hotplugging
1084 bool "Export atags in procfs"
1088 Should the atags used to boot the kernel be exported in an "atags"
1089 file in procfs. Useful with kexec.
1093 menu "CPU Power Management"
1095 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1097 source "drivers/cpufreq/Kconfig"
1099 config CPU_FREQ_SA1100
1101 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1104 config CPU_FREQ_SA1110
1106 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1109 config CPU_FREQ_INTEGRATOR
1110 tristate "CPUfreq driver for ARM Integrator CPUs"
1111 depends on ARCH_INTEGRATOR && CPU_FREQ
1114 This enables the CPUfreq driver for ARM Integrator CPUs.
1116 For details, take a look at <file:Documentation/cpu-freq>.
1121 tristate "CPUfreq driver for i.MX CPUs"
1122 depends on ARCH_IMX && CPU_FREQ
1125 This enables the CPUfreq driver for i.MX CPUs.
1131 depends on CPU_FREQ && ARCH_PXA && PXA25x
1133 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1137 source "drivers/cpuidle/Kconfig"
1141 menu "Floating point emulation"
1143 comment "At least one emulation must be selected"
1146 bool "NWFPE math emulation"
1147 depends on !AEABI || OABI_COMPAT
1149 Say Y to include the NWFPE floating point emulator in the kernel.
1150 This is necessary to run most binaries. Linux does not currently
1151 support floating point hardware so you need to say Y here even if
1152 your machine has an FPA or floating point co-processor podule.
1154 You may say N here if you are going to load the Acorn FPEmulator
1155 early in the bootup.
1158 bool "Support extended precision"
1159 depends on FPE_NWFPE
1161 Say Y to include 80-bit support in the kernel floating-point
1162 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1163 Note that gcc does not generate 80-bit operations by default,
1164 so in most cases this option only enlarges the size of the
1165 floating point emulator without any good reason.
1167 You almost surely want to say N here.
1170 bool "FastFPE math emulation (EXPERIMENTAL)"
1171 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1173 Say Y here to include the FAST floating point emulator in the kernel.
1174 This is an experimental much faster emulator which now also has full
1175 precision for the mantissa. It does not support any exceptions.
1176 It is very simple, and approximately 3-6 times faster than NWFPE.
1178 It should be sufficient for most programs. It may be not suitable
1179 for scientific calculations, but you have to check this for yourself.
1180 If you do not feel you need a faster FP emulation you should better
1184 bool "VFP-format floating point maths"
1185 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1187 Say Y to include VFP support code in the kernel. This is needed
1188 if your hardware includes a VFP unit.
1190 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1191 release notes and additional status information.
1193 Say N if your target does not have VFP hardware.
1201 bool "Advanced SIMD (NEON) Extension support"
1202 depends on VFPv3 && CPU_V7
1204 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1209 menu "Userspace binary formats"
1211 source "fs/Kconfig.binfmt"
1214 tristate "RISC OS personality"
1217 Say Y here to include the kernel code necessary if you want to run
1218 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1219 experimental; if this sounds frightening, say N and sleep in peace.
1220 You can also say M here to compile this support as a module (which
1221 will be called arthur).
1225 menu "Power management options"
1227 source "kernel/power/Kconfig"
1229 config ARCH_SUSPEND_POSSIBLE
1234 source "net/Kconfig"
1236 menu "Device Drivers"
1238 source "drivers/base/Kconfig"
1240 source "drivers/connector/Kconfig"
1242 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1243 source "drivers/mtd/Kconfig"
1246 source "drivers/parport/Kconfig"
1248 source "drivers/pnp/Kconfig"
1250 source "drivers/block/Kconfig"
1252 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1254 source "drivers/misc/Kconfig"
1256 source "drivers/ide/Kconfig"
1258 source "drivers/scsi/Kconfig"
1260 source "drivers/ata/Kconfig"
1262 source "drivers/md/Kconfig"
1264 source "drivers/message/fusion/Kconfig"
1266 source "drivers/ieee1394/Kconfig"
1268 source "drivers/message/i2o/Kconfig"
1270 source "drivers/net/Kconfig"
1272 source "drivers/isdn/Kconfig"
1274 # input before char - char/joystick depends on it. As does USB.
1276 source "drivers/input/Kconfig"
1278 source "drivers/char/Kconfig"
1280 source "drivers/i2c/Kconfig"
1282 source "drivers/spi/Kconfig"
1284 source "drivers/gpio/Kconfig"
1286 source "drivers/w1/Kconfig"
1288 source "drivers/power/Kconfig"
1290 source "drivers/hwmon/Kconfig"
1292 source "drivers/thermal/Kconfig"
1294 source "drivers/watchdog/Kconfig"
1296 source "drivers/ssb/Kconfig"
1298 #source "drivers/l3/Kconfig"
1300 source "drivers/mfd/Kconfig"
1302 source "drivers/media/Kconfig"
1304 source "drivers/video/Kconfig"
1306 source "sound/Kconfig"
1308 source "drivers/hid/Kconfig"
1310 source "drivers/usb/Kconfig"
1312 source "drivers/uwb/Kconfig"
1314 source "drivers/mmc/Kconfig"
1316 source "drivers/memstick/Kconfig"
1318 source "drivers/accessibility/Kconfig"
1320 source "drivers/leds/Kconfig"
1322 source "drivers/rtc/Kconfig"
1324 source "drivers/dma/Kconfig"
1326 source "drivers/dca/Kconfig"
1328 source "drivers/auxdisplay/Kconfig"
1330 source "drivers/regulator/Kconfig"
1332 source "drivers/uio/Kconfig"
1334 source "drivers/staging/Kconfig"
1340 source "arch/arm/Kconfig.debug"
1342 source "security/Kconfig"
1344 source "crypto/Kconfig"
1346 source "lib/Kconfig"