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"
391 select GENERIC_CLOCKEVENTS
394 Support for the following Marvell Kirkwood series SoCs:
395 88F6180, 88F6192 and 88F6281.
398 bool "Micrel/Kendin KS8695"
401 select ARCH_REQUIRE_GPIOLIB
403 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
404 System-on-Chip devices.
407 bool "NetSilicon NS9xxx"
411 select GENERIC_CLOCKEVENTS
414 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
417 <http://www.digi.com/products/microprocessors/index.jsp>
420 bool "Marvell Loki (88RC8480)"
423 select GENERIC_CLOCKEVENTS
426 Support for the Marvell Loki (88RC8480) SoC.
429 bool "Marvell MV78xx0"
433 select GENERIC_CLOCKEVENTS
436 Support for the following Marvell MV78xx0 series SoCs:
440 bool "Freescale MXC/iMX-based"
442 select GENERIC_CLOCKEVENTS
445 select ARCH_REQUIRE_GPIOLIB
447 Support for Freescale MXC/iMX-based family of processors
456 select GENERIC_CLOCKEVENTS
459 Support for the following Marvell Orion 5x series SoCs:
460 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
461 Orion-2 (5281), Orion-1-90 (6183).
464 bool "Philips Nexperia PNX4008 Mobile"
468 This enables support for Philips PNX4008 mobile platform.
471 bool "PXA2xx/PXA3xx-based"
477 select ARCH_REQUIRE_GPIOLIB
479 select GENERIC_CLOCKEVENTS
482 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
489 select ARCH_MAY_HAVE_PC_FDC
490 select HAVE_PATA_PLATFORM
493 select ARCH_SPARSEMEM_ENABLE
495 On the Acorn Risc-PC, Linux can support the internal IDE disk and
496 CD-ROM interface, serial and parallel port, and the floppy drive.
502 select ARCH_SPARSEMEM_ENABLE
506 select GENERIC_CLOCKEVENTS
509 select ARCH_REQUIRE_GPIOLIB
511 Support for StrongARM 11x0 based boards.
514 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
518 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
519 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
520 the Samsung SMDK2410 development board (and derivatives).
523 bool "Samsung S3C64XX"
527 Samsung S3C64XX series based systems
537 Support for the StrongARM based Digital DNARD machine, also known
538 as "Shark" (<http://www.shark-linux.de/shark.html>).
543 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
544 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
546 Say Y here for systems based on one of the Sharp LH7A40X
547 System on a Chip processors. These CPUs include an ARM922T
548 core with a wide array of integrated devices for
549 hand-held and low-power applications.
555 select GENERIC_CLOCKEVENTS
557 select ARCH_REQUIRE_GPIOLIB
561 Support for TI's DaVinci platform.
567 select ARCH_REQUIRE_GPIOLIB
569 select GENERIC_CLOCKEVENTS
571 Support for TI's OMAP platform (OMAP1 and OMAP2).
577 select GENERIC_CLOCKEVENTS
579 Support for Qualcomm MSM7K based systems. This runs on the ARM11
580 apps processor of the MSM7K and depends on a shared memory
581 interface to the ARM9 modem processor which runs the baseband stack
582 and controls some vital subsystems (clock and power control, etc).
585 bool "Nuvoton W90X900 CPU"
588 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
589 can login www.mcuos.com or www.nuvoton.com to know more.
593 source "arch/arm/mach-clps711x/Kconfig"
595 source "arch/arm/mach-ep93xx/Kconfig"
597 source "arch/arm/mach-footbridge/Kconfig"
599 source "arch/arm/mach-integrator/Kconfig"
601 source "arch/arm/mach-iop32x/Kconfig"
603 source "arch/arm/mach-iop33x/Kconfig"
605 source "arch/arm/mach-iop13xx/Kconfig"
607 source "arch/arm/mach-ixp4xx/Kconfig"
609 source "arch/arm/mach-ixp2000/Kconfig"
611 source "arch/arm/mach-ixp23xx/Kconfig"
613 source "arch/arm/mach-loki/Kconfig"
615 source "arch/arm/mach-mv78xx0/Kconfig"
617 source "arch/arm/mach-pxa/Kconfig"
619 source "arch/arm/mach-sa1100/Kconfig"
621 source "arch/arm/plat-omap/Kconfig"
623 source "arch/arm/mach-omap1/Kconfig"
625 source "arch/arm/mach-omap2/Kconfig"
627 source "arch/arm/mach-orion5x/Kconfig"
629 source "arch/arm/mach-kirkwood/Kconfig"
631 source "arch/arm/plat-s3c24xx/Kconfig"
632 source "arch/arm/plat-s3c64xx/Kconfig"
633 source "arch/arm/plat-s3c/Kconfig"
636 source "arch/arm/mach-s3c2400/Kconfig"
637 source "arch/arm/mach-s3c2410/Kconfig"
638 source "arch/arm/mach-s3c2412/Kconfig"
639 source "arch/arm/mach-s3c2440/Kconfig"
640 source "arch/arm/mach-s3c2442/Kconfig"
641 source "arch/arm/mach-s3c2443/Kconfig"
645 source "arch/arm/mach-s3c6400/Kconfig"
646 source "arch/arm/mach-s3c6410/Kconfig"
649 source "arch/arm/mach-lh7a40x/Kconfig"
651 source "arch/arm/mach-imx/Kconfig"
653 source "arch/arm/mach-h720x/Kconfig"
655 source "arch/arm/mach-versatile/Kconfig"
657 source "arch/arm/mach-aaec2000/Kconfig"
659 source "arch/arm/mach-realview/Kconfig"
661 source "arch/arm/mach-at91/Kconfig"
663 source "arch/arm/plat-mxc/Kconfig"
665 source "arch/arm/mach-netx/Kconfig"
667 source "arch/arm/mach-ns9xxx/Kconfig"
669 source "arch/arm/mach-davinci/Kconfig"
671 source "arch/arm/mach-ks8695/Kconfig"
673 source "arch/arm/mach-msm/Kconfig"
675 source "arch/arm/mach-w90x900/Kconfig"
677 # Definitions to make life easier
687 source arch/arm/mm/Kconfig
690 bool "Enable iWMMXt support"
691 depends on CPU_XSCALE || CPU_XSC3
692 default y if PXA27x || PXA3xx
694 Enable support for iWMMXt context switching at run time if
695 running on a CPU that supports it.
697 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
700 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
704 source "arch/arm/Kconfig-nommu"
709 source "arch/arm/common/Kconfig"
711 config FORCE_MAX_ZONEORDER
724 Find out whether you have ISA slots on your motherboard. ISA is the
725 name of a bus system, i.e. the way the CPU talks to the other stuff
726 inside your box. Other bus systems are PCI, EISA, MicroChannel
727 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
728 newer boards don't support it. If you have ISA, say Y, otherwise N.
730 # Select ISA DMA controller support
735 # Select ISA DMA interface
740 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
742 Find out whether you have a PCI motherboard. PCI is the name of a
743 bus system, i.e. the way the CPU talks to the other stuff inside
744 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
745 VESA. If you have PCI, say Y, otherwise N.
750 # Select the host bridge type
751 config PCI_HOST_VIA82C505
753 depends on PCI && ARCH_SHARK
756 config PCI_HOST_ITE8152
758 depends on PCI && MACH_ARMCORE
762 source "drivers/pci/Kconfig"
764 source "drivers/pcmcia/Kconfig"
768 menu "Kernel Features"
770 source "kernel/time/Kconfig"
773 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
774 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
775 select USE_GENERIC_SMP_HELPERS
777 This enables support for systems with more than one CPU. If you have
778 a system with only one CPU, like most personal computers, say N. If
779 you have a system with more than one CPU, say Y.
781 If you say N here, the kernel will run on single and multiprocessor
782 machines, but will use only one CPU of a multiprocessor machine. If
783 you say Y here, the kernel will run on many, but not all, single
784 processor machines. On a single processor machine, the kernel will
785 run faster if you say N here.
787 See also <file:Documentation/i386/IO-APIC.txt>,
788 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
789 <http://www.linuxdoc.org/docs.html#howto>.
791 If you don't know what to do here, say N.
794 prompt "Memory split"
797 Select the desired split between kernel and user memory.
799 If you are not absolutely sure what you are doing, leave this
803 bool "3G/1G user/kernel split"
805 bool "2G/2G user/kernel split"
807 bool "1G/3G user/kernel split"
812 default 0x40000000 if VMSPLIT_1G
813 default 0x80000000 if VMSPLIT_2G
817 int "Maximum number of CPUs (2-32)"
823 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
824 depends on SMP && HOTPLUG && EXPERIMENTAL
826 Say Y here to experiment with turning CPUs off and on. CPUs
827 can be controlled through /sys/devices/system/cpu.
830 bool "Use local timer interrupts"
831 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
834 Enable support for local timers on SMP platforms, rather then the
835 legacy IPI broadcast method. Local timers allows the system
836 accounting to be spread across the timer interval, preventing a
837 "thundering herd" at every timer tick.
840 bool "Preemptible Kernel (EXPERIMENTAL)"
841 depends on EXPERIMENTAL
843 This option reduces the latency of the kernel when reacting to
844 real-time or interactive events by allowing a low priority process to
845 be preempted even if it is in kernel mode executing a system call.
846 This allows applications to run more reliably even when the system is
849 Say Y here if you are building a kernel for a desktop, embedded
850 or real-time system. Say N if you are unsure.
854 default 128 if ARCH_L7200
855 default 200 if ARCH_EBSA110 || ARCH_S3C2410
856 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
857 default AT91_TIMER_HZ if ARCH_AT91
861 bool "Use the ARM EABI to compile the kernel"
863 This option allows for the kernel to be compiled using the latest
864 ARM ABI (aka EABI). This is only useful if you are using a user
865 space environment that is also compiled with EABI.
867 Since there are major incompatibilities between the legacy ABI and
868 EABI, especially with regard to structure member alignment, this
869 option also changes the kernel syscall calling convention to
870 disambiguate both ABIs and allow for backward compatibility support
871 (selected with CONFIG_OABI_COMPAT).
873 To use this you need GCC version 4.0.0 or later.
876 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
877 depends on AEABI && EXPERIMENTAL
880 This option preserves the old syscall interface along with the
881 new (ARM EABI) one. It also provides a compatibility layer to
882 intercept syscalls that have structure arguments which layout
883 in memory differs between the legacy ABI and the new ARM EABI
884 (only for non "thumb" binaries). This option adds a tiny
885 overhead to all syscalls and produces a slightly larger kernel.
886 If you know you'll be using only pure EABI user space then you
887 can say N here. If this option is not selected and you attempt
888 to execute a legacy ABI binary then the result will be
889 UNPREDICTABLE (in fact it can be predicted that it won't work
890 at all). If in doubt say Y.
892 config ARCH_FLATMEM_HAS_HOLES
897 # Discontigmem is deprecated
898 config ARCH_DISCONTIGMEM_ENABLE
901 config ARCH_SPARSEMEM_ENABLE
904 config ARCH_SPARSEMEM_DEFAULT
905 def_bool ARCH_SPARSEMEM_ENABLE
907 config ARCH_SELECT_MEMORY_MODEL
908 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
912 default "4" if ARCH_LH7A40X
914 depends on NEED_MULTIPLE_NODES
919 bool "Timer and CPU usage LEDs"
920 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
921 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
922 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
923 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
924 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
925 ARCH_AT91 || ARCH_DAVINCI || \
926 ARCH_KS8695 || MACH_RD88F5182
928 If you say Y here, the LEDs on your machine will be used
929 to provide useful information about your current system status.
931 If you are compiling a kernel for a NetWinder or EBSA-285, you will
932 be able to select which LEDs are active using the options below. If
933 you are compiling a kernel for the EBSA-110 or the LART however, the
934 red LED will simply flash regularly to indicate that the system is
935 still functional. It is safe to say Y here if you have a CATS
936 system, but the driver will do nothing.
939 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
940 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
941 || MACH_OMAP_PERSEUS2
943 depends on !GENERIC_CLOCKEVENTS
944 default y if ARCH_EBSA110
946 If you say Y here, one of the system LEDs (the green one on the
947 NetWinder, the amber one on the EBSA285, or the red one on the LART)
948 will flash regularly to indicate that the system is still
949 operational. This is mainly useful to kernel hackers who are
950 debugging unstable kernels.
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.
957 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
959 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
960 || MACH_OMAP_PERSEUS2
963 If you say Y here, the red LED will be used to give a good real
964 time indication of CPU usage, by lighting whenever the idle task
965 is not currently executing.
967 The LART uses the same LED for both Timer LED and CPU usage LED
968 functions. You may choose to use both, but the Timer LED function
969 will overrule the CPU usage LED.
971 config ALIGNMENT_TRAP
973 depends on CPU_CP15_MMU
974 default y if !ARCH_EBSA110
976 ARM processors cannot fetch/store information which is not
977 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
978 address divisible by 4. On 32-bit ARM processors, these non-aligned
979 fetch/store instructions will be emulated in software if you say
980 here, which has a severe performance impact. This is necessary for
981 correct operation of some network protocols. With an IP-only
982 configuration it is safe to say N, otherwise say Y.
988 # Compressed boot loader in ROM. Yes, we really want to ask about
989 # TEXT and BSS so we preserve their values in the config files.
990 config ZBOOT_ROM_TEXT
991 hex "Compressed ROM boot loader base address"
994 The physical address at which the ROM-able zImage is to be
995 placed in the target. Platforms which normally make use of
996 ROM-able zImage formats normally set this to a suitable
997 value in their defconfig file.
999 If ZBOOT_ROM is not enabled, this has no effect.
1001 config ZBOOT_ROM_BSS
1002 hex "Compressed ROM boot loader BSS address"
1005 The base address of an area of read/write memory in the target
1006 for the ROM-able zImage which must be available while the
1007 decompressor is running. It must be large enough to hold the
1008 entire decompressed kernel plus an additional 128 KiB.
1009 Platforms which normally make use of ROM-able zImage formats
1010 normally set this to a suitable value in their defconfig file.
1012 If ZBOOT_ROM is not enabled, this has no effect.
1015 bool "Compressed boot loader in ROM/flash"
1016 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1018 Say Y here if you intend to execute your compressed kernel image
1019 (zImage) directly from ROM or flash. If unsure, say N.
1022 string "Default kernel command string"
1025 On some architectures (EBSA110 and CATS), there is currently no way
1026 for the boot loader to pass arguments to the kernel. For these
1027 architectures, you should supply some command-line options at build
1028 time by entering them here. As a minimum, you should specify the
1029 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1032 bool "Kernel Execute-In-Place from ROM"
1033 depends on !ZBOOT_ROM
1035 Execute-In-Place allows the kernel to run from non-volatile storage
1036 directly addressable by the CPU, such as NOR flash. This saves RAM
1037 space since the text section of the kernel is not loaded from flash
1038 to RAM. Read-write sections, such as the data section and stack,
1039 are still copied to RAM. The XIP kernel is not compressed since
1040 it has to run directly from flash, so it will take more space to
1041 store it. The flash address used to link the kernel object files,
1042 and for storing it, is configuration dependent. Therefore, if you
1043 say Y here, you must know the proper physical address where to
1044 store the kernel image depending on your own flash memory usage.
1046 Also note that the make target becomes "make xipImage" rather than
1047 "make zImage" or "make Image". The final kernel binary to put in
1048 ROM memory will be arch/arm/boot/xipImage.
1052 config XIP_PHYS_ADDR
1053 hex "XIP Kernel Physical Location"
1054 depends on XIP_KERNEL
1055 default "0x00080000"
1057 This is the physical address in your flash memory the kernel will
1058 be linked for and stored to. This address is dependent on your
1062 bool "Kexec system call (EXPERIMENTAL)"
1063 depends on EXPERIMENTAL
1065 kexec is a system call that implements the ability to shutdown your
1066 current kernel, and to start another kernel. It is like a reboot
1067 but it is independent of the system firmware. And like a reboot
1068 you can start any kernel with it, not just Linux.
1070 It is an ongoing process to be certain the hardware in a machine
1071 is properly shutdown, so do not be surprised if this code does not
1072 initially work for you. It may help to enable device hotplugging
1076 bool "Export atags in procfs"
1080 Should the atags used to boot the kernel be exported in an "atags"
1081 file in procfs. Useful with kexec.
1085 menu "CPU Power Management"
1087 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1089 source "drivers/cpufreq/Kconfig"
1091 config CPU_FREQ_SA1100
1093 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1096 config CPU_FREQ_SA1110
1098 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1101 config CPU_FREQ_INTEGRATOR
1102 tristate "CPUfreq driver for ARM Integrator CPUs"
1103 depends on ARCH_INTEGRATOR && CPU_FREQ
1106 This enables the CPUfreq driver for ARM Integrator CPUs.
1108 For details, take a look at <file:Documentation/cpu-freq>.
1113 tristate "CPUfreq driver for i.MX CPUs"
1114 depends on ARCH_IMX && CPU_FREQ
1117 This enables the CPUfreq driver for i.MX CPUs.
1123 depends on CPU_FREQ && ARCH_PXA && PXA25x
1125 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1129 source "drivers/cpuidle/Kconfig"
1133 menu "Floating point emulation"
1135 comment "At least one emulation must be selected"
1138 bool "NWFPE math emulation"
1139 depends on !AEABI || OABI_COMPAT
1141 Say Y to include the NWFPE floating point emulator in the kernel.
1142 This is necessary to run most binaries. Linux does not currently
1143 support floating point hardware so you need to say Y here even if
1144 your machine has an FPA or floating point co-processor podule.
1146 You may say N here if you are going to load the Acorn FPEmulator
1147 early in the bootup.
1150 bool "Support extended precision"
1151 depends on FPE_NWFPE
1153 Say Y to include 80-bit support in the kernel floating-point
1154 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1155 Note that gcc does not generate 80-bit operations by default,
1156 so in most cases this option only enlarges the size of the
1157 floating point emulator without any good reason.
1159 You almost surely want to say N here.
1162 bool "FastFPE math emulation (EXPERIMENTAL)"
1163 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1165 Say Y here to include the FAST floating point emulator in the kernel.
1166 This is an experimental much faster emulator which now also has full
1167 precision for the mantissa. It does not support any exceptions.
1168 It is very simple, and approximately 3-6 times faster than NWFPE.
1170 It should be sufficient for most programs. It may be not suitable
1171 for scientific calculations, but you have to check this for yourself.
1172 If you do not feel you need a faster FP emulation you should better
1176 bool "VFP-format floating point maths"
1177 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1179 Say Y to include VFP support code in the kernel. This is needed
1180 if your hardware includes a VFP unit.
1182 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1183 release notes and additional status information.
1185 Say N if your target does not have VFP hardware.
1193 bool "Advanced SIMD (NEON) Extension support"
1194 depends on VFPv3 && CPU_V7
1196 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1201 menu "Userspace binary formats"
1203 source "fs/Kconfig.binfmt"
1206 tristate "RISC OS personality"
1209 Say Y here to include the kernel code necessary if you want to run
1210 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1211 experimental; if this sounds frightening, say N and sleep in peace.
1212 You can also say M here to compile this support as a module (which
1213 will be called arthur).
1217 menu "Power management options"
1219 source "kernel/power/Kconfig"
1221 config ARCH_SUSPEND_POSSIBLE
1226 source "net/Kconfig"
1228 menu "Device Drivers"
1230 source "drivers/base/Kconfig"
1232 source "drivers/connector/Kconfig"
1234 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1235 source "drivers/mtd/Kconfig"
1238 source "drivers/parport/Kconfig"
1240 source "drivers/pnp/Kconfig"
1242 source "drivers/block/Kconfig"
1244 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1246 source "drivers/misc/Kconfig"
1248 source "drivers/ide/Kconfig"
1250 source "drivers/scsi/Kconfig"
1252 source "drivers/ata/Kconfig"
1254 source "drivers/md/Kconfig"
1256 source "drivers/message/fusion/Kconfig"
1258 source "drivers/ieee1394/Kconfig"
1260 source "drivers/message/i2o/Kconfig"
1262 source "drivers/net/Kconfig"
1264 source "drivers/isdn/Kconfig"
1266 # input before char - char/joystick depends on it. As does USB.
1268 source "drivers/input/Kconfig"
1270 source "drivers/char/Kconfig"
1272 source "drivers/i2c/Kconfig"
1274 source "drivers/spi/Kconfig"
1276 source "drivers/gpio/Kconfig"
1278 source "drivers/w1/Kconfig"
1280 source "drivers/power/Kconfig"
1282 source "drivers/hwmon/Kconfig"
1284 source "drivers/thermal/Kconfig"
1286 source "drivers/watchdog/Kconfig"
1288 source "drivers/ssb/Kconfig"
1290 #source "drivers/l3/Kconfig"
1292 source "drivers/mfd/Kconfig"
1294 source "drivers/media/Kconfig"
1296 source "drivers/video/Kconfig"
1298 source "sound/Kconfig"
1300 source "drivers/hid/Kconfig"
1302 source "drivers/usb/Kconfig"
1304 source "drivers/uwb/Kconfig"
1306 source "drivers/mmc/Kconfig"
1308 source "drivers/memstick/Kconfig"
1310 source "drivers/accessibility/Kconfig"
1312 source "drivers/leds/Kconfig"
1314 source "drivers/rtc/Kconfig"
1316 source "drivers/dma/Kconfig"
1318 source "drivers/dca/Kconfig"
1320 source "drivers/auxdisplay/Kconfig"
1322 source "drivers/regulator/Kconfig"
1324 source "drivers/uio/Kconfig"
1330 source "arch/arm/Kconfig.debug"
1332 source "security/Kconfig"
1334 source "crypto/Kconfig"
1336 source "lib/Kconfig"