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.
246 This enables support for systems based on the Atmel AT91RM9200,
247 AT91SAM9 and AT91CAP9 processors.
250 bool "Cirrus Logic CLPS711x/EP721x-based"
253 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
274 select ARCH_REQUIRE_GPIOLIB
276 This enables support for the Cirrus EP93xx series of CPUs.
279 bool "Cortina Systems Gemini"
282 Support for the Cortina Systems Gemini family SoCs
284 config ARCH_FOOTBRIDGE
289 Support for systems based on the DC21285 companion chip
290 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
293 bool "Hilscher NetX based"
296 select GENERIC_CLOCKEVENTS
299 This enables support for systems based on the Hilscher NetX Soc
302 bool "Hynix HMS720x-based"
306 This enables support for systems based on the Hynix HMS720x
313 select GENERIC_CLOCKEVENTS
315 Support for Motorola's i.MX family of processors (MX1, MXL).
323 select ARCH_SUPPORTS_MSI
326 Support for Intel's IOP13XX (XScale) family of processors.
335 select ARCH_REQUIRE_GPIOLIB
337 Support for Intel's 80219 and IOP32X (XScale) family of
347 select ARCH_REQUIRE_GPIOLIB
349 Support for Intel's IOP33X (XScale) family of processors.
357 Support for Intel's IXP23xx (XScale) family of processors.
360 bool "IXP2400/2800-based"
365 Support for Intel's IXP2400/2800 (XScale) family of processors.
373 select GENERIC_CLOCKEVENTS
374 select DMABOUNCE if PCI
376 Support for Intel's IXP4XX (XScale) family of processors.
383 Say Y here if you intend to run this kernel on a LinkUp Systems
384 L7200 Software Development Board which uses an ARM720T processor.
385 Information on this board can be obtained at:
387 <http://www.linkupsys.com/>
389 If you have any questions or comments about the Linux kernel port
390 to this board, send e-mail to <sjhill@cotw.com>.
393 bool "Marvell Kirkwood"
398 select GENERIC_CLOCKEVENTS
401 Support for the following Marvell Kirkwood series SoCs:
402 88F6180, 88F6192 and 88F6281.
405 bool "Micrel/Kendin KS8695"
408 select ARCH_REQUIRE_GPIOLIB
410 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
411 System-on-Chip devices.
414 bool "NetSilicon NS9xxx"
418 select GENERIC_CLOCKEVENTS
421 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
424 <http://www.digi.com/products/microprocessors/index.jsp>
427 bool "Marvell Loki (88RC8480)"
430 select GENERIC_CLOCKEVENTS
433 Support for the Marvell Loki (88RC8480) SoC.
436 bool "Marvell MV78xx0"
441 select GENERIC_CLOCKEVENTS
444 Support for the following Marvell MV78xx0 series SoCs:
448 bool "Freescale MXC/iMX-based"
450 select GENERIC_CLOCKEVENTS
453 select ARCH_REQUIRE_GPIOLIB
455 Support for Freescale MXC/iMX-based family of processors
464 select GENERIC_CLOCKEVENTS
467 Support for the following Marvell Orion 5x series SoCs:
468 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
469 Orion-2 (5281), Orion-1-90 (6183).
472 bool "Philips Nexperia PNX4008 Mobile"
476 This enables support for Philips PNX4008 mobile platform.
479 bool "PXA2xx/PXA3xx-based"
485 select ARCH_REQUIRE_GPIOLIB
487 select GENERIC_CLOCKEVENTS
490 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
497 select ARCH_MAY_HAVE_PC_FDC
498 select HAVE_PATA_PLATFORM
501 select ARCH_SPARSEMEM_ENABLE
503 On the Acorn Risc-PC, Linux can support the internal IDE disk and
504 CD-ROM interface, serial and parallel port, and the floppy drive.
510 select ARCH_SPARSEMEM_ENABLE
514 select GENERIC_CLOCKEVENTS
517 select ARCH_REQUIRE_GPIOLIB
519 Support for StrongARM 11x0 based boards.
522 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
526 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
527 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
528 the Samsung SMDK2410 development board (and derivatives).
531 bool "Samsung S3C64XX"
535 Samsung S3C64XX series based systems
545 Support for the StrongARM based Digital DNARD machine, also known
546 as "Shark" (<http://www.shark-linux.de/shark.html>).
551 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
552 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
554 Say Y here for systems based on one of the Sharp LH7A40X
555 System on a Chip processors. These CPUs include an ARM922T
556 core with a wide array of integrated devices for
557 hand-held and low-power applications.
563 select GENERIC_CLOCKEVENTS
565 select ARCH_REQUIRE_GPIOLIB
569 Support for TI's DaVinci platform.
575 select ARCH_REQUIRE_GPIOLIB
577 select GENERIC_CLOCKEVENTS
579 Support for TI's OMAP platform (OMAP1 and OMAP2).
585 select GENERIC_CLOCKEVENTS
587 Support for Qualcomm MSM7K based systems. This runs on the ARM11
588 apps processor of the MSM7K and depends on a shared memory
589 interface to the ARM9 modem processor which runs the baseband stack
590 and controls some vital subsystems (clock and power control, etc).
593 bool "Nuvoton W90X900 CPU"
596 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
597 can login www.mcuos.com or www.nuvoton.com to know more.
601 source "arch/arm/mach-clps711x/Kconfig"
603 source "arch/arm/mach-ep93xx/Kconfig"
605 source "arch/arm/mach-footbridge/Kconfig"
607 source "arch/arm/mach-gemini/Kconfig"
609 source "arch/arm/mach-integrator/Kconfig"
611 source "arch/arm/mach-iop32x/Kconfig"
613 source "arch/arm/mach-iop33x/Kconfig"
615 source "arch/arm/mach-iop13xx/Kconfig"
617 source "arch/arm/mach-ixp4xx/Kconfig"
619 source "arch/arm/mach-ixp2000/Kconfig"
621 source "arch/arm/mach-ixp23xx/Kconfig"
623 source "arch/arm/mach-loki/Kconfig"
625 source "arch/arm/mach-mv78xx0/Kconfig"
627 source "arch/arm/mach-pxa/Kconfig"
629 source "arch/arm/mach-sa1100/Kconfig"
631 source "arch/arm/plat-omap/Kconfig"
633 source "arch/arm/mach-omap1/Kconfig"
635 source "arch/arm/mach-omap2/Kconfig"
637 source "arch/arm/mach-orion5x/Kconfig"
639 source "arch/arm/mach-kirkwood/Kconfig"
641 source "arch/arm/plat-s3c24xx/Kconfig"
642 source "arch/arm/plat-s3c64xx/Kconfig"
643 source "arch/arm/plat-s3c/Kconfig"
646 source "arch/arm/mach-s3c2400/Kconfig"
647 source "arch/arm/mach-s3c2410/Kconfig"
648 source "arch/arm/mach-s3c2412/Kconfig"
649 source "arch/arm/mach-s3c2440/Kconfig"
650 source "arch/arm/mach-s3c2442/Kconfig"
651 source "arch/arm/mach-s3c2443/Kconfig"
655 source "arch/arm/mach-s3c6400/Kconfig"
656 source "arch/arm/mach-s3c6410/Kconfig"
659 source "arch/arm/mach-lh7a40x/Kconfig"
661 source "arch/arm/mach-imx/Kconfig"
663 source "arch/arm/mach-h720x/Kconfig"
665 source "arch/arm/mach-versatile/Kconfig"
667 source "arch/arm/mach-aaec2000/Kconfig"
669 source "arch/arm/mach-realview/Kconfig"
671 source "arch/arm/mach-at91/Kconfig"
673 source "arch/arm/plat-mxc/Kconfig"
675 source "arch/arm/mach-netx/Kconfig"
677 source "arch/arm/mach-ns9xxx/Kconfig"
679 source "arch/arm/mach-davinci/Kconfig"
681 source "arch/arm/mach-ks8695/Kconfig"
683 source "arch/arm/mach-msm/Kconfig"
685 source "arch/arm/mach-w90x900/Kconfig"
687 # Definitions to make life easier
697 source arch/arm/mm/Kconfig
700 bool "Enable iWMMXt support"
701 depends on CPU_XSCALE || CPU_XSC3
702 default y if PXA27x || PXA3xx
704 Enable support for iWMMXt context switching at run time if
705 running on a CPU that supports it.
707 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
710 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
714 source "arch/arm/Kconfig-nommu"
719 source "arch/arm/common/Kconfig"
721 config FORCE_MAX_ZONEORDER
734 Find out whether you have ISA slots on your motherboard. ISA is the
735 name of a bus system, i.e. the way the CPU talks to the other stuff
736 inside your box. Other bus systems are PCI, EISA, MicroChannel
737 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
738 newer boards don't support it. If you have ISA, say Y, otherwise N.
740 # Select ISA DMA controller support
745 # Select ISA DMA interface
750 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
752 Find out whether you have a PCI motherboard. PCI is the name of a
753 bus system, i.e. the way the CPU talks to the other stuff inside
754 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
755 VESA. If you have PCI, say Y, otherwise N.
760 # Select the host bridge type
761 config PCI_HOST_VIA82C505
763 depends on PCI && ARCH_SHARK
766 config PCI_HOST_ITE8152
768 depends on PCI && MACH_ARMCORE
772 source "drivers/pci/Kconfig"
774 source "drivers/pcmcia/Kconfig"
778 menu "Kernel Features"
780 source "kernel/time/Kconfig"
783 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
784 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
785 select USE_GENERIC_SMP_HELPERS
787 This enables support for systems with more than one CPU. If you have
788 a system with only one CPU, like most personal computers, say N. If
789 you have a system with more than one CPU, say Y.
791 If you say N here, the kernel will run on single and multiprocessor
792 machines, but will use only one CPU of a multiprocessor machine. If
793 you say Y here, the kernel will run on many, but not all, single
794 processor machines. On a single processor machine, the kernel will
795 run faster if you say N here.
797 See also <file:Documentation/i386/IO-APIC.txt>,
798 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
799 <http://www.linuxdoc.org/docs.html#howto>.
801 If you don't know what to do here, say N.
804 prompt "Memory split"
807 Select the desired split between kernel and user memory.
809 If you are not absolutely sure what you are doing, leave this
813 bool "3G/1G user/kernel split"
815 bool "2G/2G user/kernel split"
817 bool "1G/3G user/kernel split"
822 default 0x40000000 if VMSPLIT_1G
823 default 0x80000000 if VMSPLIT_2G
827 int "Maximum number of CPUs (2-32)"
833 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
834 depends on SMP && HOTPLUG && EXPERIMENTAL
836 Say Y here to experiment with turning CPUs off and on. CPUs
837 can be controlled through /sys/devices/system/cpu.
840 bool "Use local timer interrupts"
841 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
844 Enable support for local timers on SMP platforms, rather then the
845 legacy IPI broadcast method. Local timers allows the system
846 accounting to be spread across the timer interval, preventing a
847 "thundering herd" at every timer tick.
850 bool "Preemptible Kernel (EXPERIMENTAL)"
851 depends on EXPERIMENTAL
853 This option reduces the latency of the kernel when reacting to
854 real-time or interactive events by allowing a low priority process to
855 be preempted even if it is in kernel mode executing a system call.
856 This allows applications to run more reliably even when the system is
859 Say Y here if you are building a kernel for a desktop, embedded
860 or real-time system. Say N if you are unsure.
864 default 128 if ARCH_L7200
865 default 200 if ARCH_EBSA110 || ARCH_S3C2410
866 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
867 default AT91_TIMER_HZ if ARCH_AT91
871 bool "Use the ARM EABI to compile the kernel"
873 This option allows for the kernel to be compiled using the latest
874 ARM ABI (aka EABI). This is only useful if you are using a user
875 space environment that is also compiled with EABI.
877 Since there are major incompatibilities between the legacy ABI and
878 EABI, especially with regard to structure member alignment, this
879 option also changes the kernel syscall calling convention to
880 disambiguate both ABIs and allow for backward compatibility support
881 (selected with CONFIG_OABI_COMPAT).
883 To use this you need GCC version 4.0.0 or later.
886 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
887 depends on AEABI && EXPERIMENTAL
890 This option preserves the old syscall interface along with the
891 new (ARM EABI) one. It also provides a compatibility layer to
892 intercept syscalls that have structure arguments which layout
893 in memory differs between the legacy ABI and the new ARM EABI
894 (only for non "thumb" binaries). This option adds a tiny
895 overhead to all syscalls and produces a slightly larger kernel.
896 If you know you'll be using only pure EABI user space then you
897 can say N here. If this option is not selected and you attempt
898 to execute a legacy ABI binary then the result will be
899 UNPREDICTABLE (in fact it can be predicted that it won't work
900 at all). If in doubt say Y.
902 config ARCH_FLATMEM_HAS_HOLES
907 # Discontigmem is deprecated
908 config ARCH_DISCONTIGMEM_ENABLE
911 config ARCH_SPARSEMEM_ENABLE
914 config ARCH_SPARSEMEM_DEFAULT
915 def_bool ARCH_SPARSEMEM_ENABLE
917 config ARCH_SELECT_MEMORY_MODEL
918 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
922 default "4" if ARCH_LH7A40X
924 depends on NEED_MULTIPLE_NODES
929 bool "Timer and CPU usage LEDs"
930 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
931 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
932 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
933 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
934 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
935 ARCH_AT91 || ARCH_DAVINCI || \
936 ARCH_KS8695 || MACH_RD88F5182
938 If you say Y here, the LEDs on your machine will be used
939 to provide useful information about your current system status.
941 If you are compiling a kernel for a NetWinder or EBSA-285, you will
942 be able to select which LEDs are active using the options below. If
943 you are compiling a kernel for the EBSA-110 or the LART however, the
944 red LED will simply flash regularly to indicate that the system is
945 still functional. It is safe to say Y here if you have a CATS
946 system, but the driver will do nothing.
949 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
950 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
951 || MACH_OMAP_PERSEUS2
953 depends on !GENERIC_CLOCKEVENTS
954 default y if ARCH_EBSA110
956 If you say Y here, one of the system LEDs (the green one on the
957 NetWinder, the amber one on the EBSA285, or the red one on the LART)
958 will flash regularly to indicate that the system is still
959 operational. This is mainly useful to kernel hackers who are
960 debugging unstable kernels.
962 The LART uses the same LED for both Timer LED and CPU usage LED
963 functions. You may choose to use both, but the Timer LED function
964 will overrule the CPU usage LED.
967 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
969 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
970 || MACH_OMAP_PERSEUS2
973 If you say Y here, the red LED will be used to give a good real
974 time indication of CPU usage, by lighting whenever the idle task
975 is not currently executing.
977 The LART uses the same LED for both Timer LED and CPU usage LED
978 functions. You may choose to use both, but the Timer LED function
979 will overrule the CPU usage LED.
981 config ALIGNMENT_TRAP
983 depends on CPU_CP15_MMU
984 default y if !ARCH_EBSA110
986 ARM processors cannot fetch/store information which is not
987 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
988 address divisible by 4. On 32-bit ARM processors, these non-aligned
989 fetch/store instructions will be emulated in software if you say
990 here, which has a severe performance impact. This is necessary for
991 correct operation of some network protocols. With an IP-only
992 configuration it is safe to say N, otherwise say Y.
998 # Compressed boot loader in ROM. Yes, we really want to ask about
999 # TEXT and BSS so we preserve their values in the config files.
1000 config ZBOOT_ROM_TEXT
1001 hex "Compressed ROM boot loader base address"
1004 The physical address at which the ROM-able zImage is to be
1005 placed in the target. Platforms which normally make use of
1006 ROM-able zImage formats normally set this to a suitable
1007 value in their defconfig file.
1009 If ZBOOT_ROM is not enabled, this has no effect.
1011 config ZBOOT_ROM_BSS
1012 hex "Compressed ROM boot loader BSS address"
1015 The base address of an area of read/write memory in the target
1016 for the ROM-able zImage which must be available while the
1017 decompressor is running. It must be large enough to hold the
1018 entire decompressed kernel plus an additional 128 KiB.
1019 Platforms which normally make use of ROM-able zImage formats
1020 normally set this to a suitable value in their defconfig file.
1022 If ZBOOT_ROM is not enabled, this has no effect.
1025 bool "Compressed boot loader in ROM/flash"
1026 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1028 Say Y here if you intend to execute your compressed kernel image
1029 (zImage) directly from ROM or flash. If unsure, say N.
1032 string "Default kernel command string"
1035 On some architectures (EBSA110 and CATS), there is currently no way
1036 for the boot loader to pass arguments to the kernel. For these
1037 architectures, you should supply some command-line options at build
1038 time by entering them here. As a minimum, you should specify the
1039 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1042 bool "Kernel Execute-In-Place from ROM"
1043 depends on !ZBOOT_ROM
1045 Execute-In-Place allows the kernel to run from non-volatile storage
1046 directly addressable by the CPU, such as NOR flash. This saves RAM
1047 space since the text section of the kernel is not loaded from flash
1048 to RAM. Read-write sections, such as the data section and stack,
1049 are still copied to RAM. The XIP kernel is not compressed since
1050 it has to run directly from flash, so it will take more space to
1051 store it. The flash address used to link the kernel object files,
1052 and for storing it, is configuration dependent. Therefore, if you
1053 say Y here, you must know the proper physical address where to
1054 store the kernel image depending on your own flash memory usage.
1056 Also note that the make target becomes "make xipImage" rather than
1057 "make zImage" or "make Image". The final kernel binary to put in
1058 ROM memory will be arch/arm/boot/xipImage.
1062 config XIP_PHYS_ADDR
1063 hex "XIP Kernel Physical Location"
1064 depends on XIP_KERNEL
1065 default "0x00080000"
1067 This is the physical address in your flash memory the kernel will
1068 be linked for and stored to. This address is dependent on your
1072 bool "Kexec system call (EXPERIMENTAL)"
1073 depends on EXPERIMENTAL
1075 kexec is a system call that implements the ability to shutdown your
1076 current kernel, and to start another kernel. It is like a reboot
1077 but it is independent of the system firmware. And like a reboot
1078 you can start any kernel with it, not just Linux.
1080 It is an ongoing process to be certain the hardware in a machine
1081 is properly shutdown, so do not be surprised if this code does not
1082 initially work for you. It may help to enable device hotplugging
1086 bool "Export atags in procfs"
1090 Should the atags used to boot the kernel be exported in an "atags"
1091 file in procfs. Useful with kexec.
1095 menu "CPU Power Management"
1097 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1099 source "drivers/cpufreq/Kconfig"
1101 config CPU_FREQ_SA1100
1103 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1106 config CPU_FREQ_SA1110
1108 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1111 config CPU_FREQ_INTEGRATOR
1112 tristate "CPUfreq driver for ARM Integrator CPUs"
1113 depends on ARCH_INTEGRATOR && CPU_FREQ
1116 This enables the CPUfreq driver for ARM Integrator CPUs.
1118 For details, take a look at <file:Documentation/cpu-freq>.
1123 tristate "CPUfreq driver for i.MX CPUs"
1124 depends on ARCH_IMX && CPU_FREQ
1127 This enables the CPUfreq driver for i.MX CPUs.
1133 depends on CPU_FREQ && ARCH_PXA && PXA25x
1135 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1139 source "drivers/cpuidle/Kconfig"
1143 menu "Floating point emulation"
1145 comment "At least one emulation must be selected"
1148 bool "NWFPE math emulation"
1149 depends on !AEABI || OABI_COMPAT
1151 Say Y to include the NWFPE floating point emulator in the kernel.
1152 This is necessary to run most binaries. Linux does not currently
1153 support floating point hardware so you need to say Y here even if
1154 your machine has an FPA or floating point co-processor podule.
1156 You may say N here if you are going to load the Acorn FPEmulator
1157 early in the bootup.
1160 bool "Support extended precision"
1161 depends on FPE_NWFPE
1163 Say Y to include 80-bit support in the kernel floating-point
1164 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1165 Note that gcc does not generate 80-bit operations by default,
1166 so in most cases this option only enlarges the size of the
1167 floating point emulator without any good reason.
1169 You almost surely want to say N here.
1172 bool "FastFPE math emulation (EXPERIMENTAL)"
1173 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1175 Say Y here to include the FAST floating point emulator in the kernel.
1176 This is an experimental much faster emulator which now also has full
1177 precision for the mantissa. It does not support any exceptions.
1178 It is very simple, and approximately 3-6 times faster than NWFPE.
1180 It should be sufficient for most programs. It may be not suitable
1181 for scientific calculations, but you have to check this for yourself.
1182 If you do not feel you need a faster FP emulation you should better
1186 bool "VFP-format floating point maths"
1187 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1189 Say Y to include VFP support code in the kernel. This is needed
1190 if your hardware includes a VFP unit.
1192 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1193 release notes and additional status information.
1195 Say N if your target does not have VFP hardware.
1203 bool "Advanced SIMD (NEON) Extension support"
1204 depends on VFPv3 && CPU_V7
1206 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1211 menu "Userspace binary formats"
1213 source "fs/Kconfig.binfmt"
1216 tristate "RISC OS personality"
1219 Say Y here to include the kernel code necessary if you want to run
1220 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1221 experimental; if this sounds frightening, say N and sleep in peace.
1222 You can also say M here to compile this support as a module (which
1223 will be called arthur).
1227 menu "Power management options"
1229 source "kernel/power/Kconfig"
1231 config ARCH_SUSPEND_POSSIBLE
1236 source "net/Kconfig"
1238 menu "Device Drivers"
1240 source "drivers/base/Kconfig"
1242 source "drivers/connector/Kconfig"
1244 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1245 source "drivers/mtd/Kconfig"
1248 source "drivers/parport/Kconfig"
1250 source "drivers/pnp/Kconfig"
1252 source "drivers/block/Kconfig"
1254 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1256 source "drivers/misc/Kconfig"
1258 source "drivers/ide/Kconfig"
1260 source "drivers/scsi/Kconfig"
1262 source "drivers/ata/Kconfig"
1264 source "drivers/md/Kconfig"
1266 source "drivers/message/fusion/Kconfig"
1268 source "drivers/ieee1394/Kconfig"
1270 source "drivers/message/i2o/Kconfig"
1272 source "drivers/net/Kconfig"
1274 source "drivers/isdn/Kconfig"
1276 # input before char - char/joystick depends on it. As does USB.
1278 source "drivers/input/Kconfig"
1280 source "drivers/char/Kconfig"
1282 source "drivers/i2c/Kconfig"
1284 source "drivers/spi/Kconfig"
1286 source "drivers/gpio/Kconfig"
1288 source "drivers/w1/Kconfig"
1290 source "drivers/power/Kconfig"
1292 source "drivers/hwmon/Kconfig"
1294 source "drivers/thermal/Kconfig"
1296 source "drivers/watchdog/Kconfig"
1298 source "drivers/ssb/Kconfig"
1300 #source "drivers/l3/Kconfig"
1302 source "drivers/mfd/Kconfig"
1304 source "drivers/media/Kconfig"
1306 source "drivers/video/Kconfig"
1308 source "sound/Kconfig"
1310 source "drivers/hid/Kconfig"
1312 source "drivers/usb/Kconfig"
1314 source "drivers/uwb/Kconfig"
1316 source "drivers/mmc/Kconfig"
1318 source "drivers/memstick/Kconfig"
1320 source "drivers/accessibility/Kconfig"
1322 source "drivers/leds/Kconfig"
1324 source "drivers/rtc/Kconfig"
1326 source "drivers/dma/Kconfig"
1328 source "drivers/dca/Kconfig"
1330 source "drivers/auxdisplay/Kconfig"
1332 source "drivers/regulator/Kconfig"
1334 source "drivers/uio/Kconfig"
1336 source "drivers/staging/Kconfig"
1342 source "arch/arm/Kconfig.debug"
1344 source "security/Kconfig"
1346 source "crypto/Kconfig"
1348 source "lib/Kconfig"