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"
400 select ARCH_REQUIRE_GPIOLIB
402 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
403 System-on-Chip devices.
406 bool "NetSilicon NS9xxx"
410 select GENERIC_CLOCKEVENTS
413 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
416 <http://www.digi.com/products/microprocessors/index.jsp>
419 bool "Marvell Loki (88RC8480)"
422 select GENERIC_CLOCKEVENTS
425 Support for the Marvell Loki (88RC8480) SoC.
428 bool "Marvell MV78xx0"
432 select GENERIC_CLOCKEVENTS
435 Support for the following Marvell MV78xx0 series SoCs:
439 bool "Freescale MXC/iMX-based"
441 select GENERIC_CLOCKEVENTS
444 select ARCH_REQUIRE_GPIOLIB
446 Support for Freescale MXC/iMX-based family of processors
455 select GENERIC_CLOCKEVENTS
458 Support for the following Marvell Orion 5x series SoCs:
459 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
460 Orion-2 (5281), Orion-1-90 (6183).
463 bool "Philips Nexperia PNX4008 Mobile"
467 This enables support for Philips PNX4008 mobile platform.
470 bool "PXA2xx/PXA3xx-based"
476 select ARCH_REQUIRE_GPIOLIB
478 select GENERIC_CLOCKEVENTS
481 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
488 select ARCH_MAY_HAVE_PC_FDC
489 select HAVE_PATA_PLATFORM
492 select ARCH_SPARSEMEM_ENABLE
494 On the Acorn Risc-PC, Linux can support the internal IDE disk and
495 CD-ROM interface, serial and parallel port, and the floppy drive.
501 select ARCH_SPARSEMEM_ENABLE
505 select GENERIC_CLOCKEVENTS
508 select ARCH_REQUIRE_GPIOLIB
510 Support for StrongARM 11x0 based boards.
513 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
517 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
518 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
519 the Samsung SMDK2410 development board (and derivatives).
522 bool "Samsung S3C64XX"
526 Samsung S3C64XX series based systems
536 Support for the StrongARM based Digital DNARD machine, also known
537 as "Shark" (<http://www.shark-linux.de/shark.html>).
542 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
543 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
545 Say Y here for systems based on one of the Sharp LH7A40X
546 System on a Chip processors. These CPUs include an ARM922T
547 core with a wide array of integrated devices for
548 hand-held and low-power applications.
554 select GENERIC_CLOCKEVENTS
556 select ARCH_REQUIRE_GPIOLIB
560 Support for TI's DaVinci platform.
566 select ARCH_REQUIRE_GPIOLIB
568 select GENERIC_CLOCKEVENTS
570 Support for TI's OMAP platform (OMAP1 and OMAP2).
576 select GENERIC_CLOCKEVENTS
578 Support for Qualcomm MSM7K based systems. This runs on the ARM11
579 apps processor of the MSM7K and depends on a shared memory
580 interface to the ARM9 modem processor which runs the baseband stack
581 and controls some vital subsystems (clock and power control, etc).
584 bool "Nuvoton W90X900 CPU"
587 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
588 can login www.mcuos.com or www.nuvoton.com to know more.
592 source "arch/arm/mach-clps711x/Kconfig"
594 source "arch/arm/mach-ep93xx/Kconfig"
596 source "arch/arm/mach-footbridge/Kconfig"
598 source "arch/arm/mach-integrator/Kconfig"
600 source "arch/arm/mach-iop32x/Kconfig"
602 source "arch/arm/mach-iop33x/Kconfig"
604 source "arch/arm/mach-iop13xx/Kconfig"
606 source "arch/arm/mach-ixp4xx/Kconfig"
608 source "arch/arm/mach-ixp2000/Kconfig"
610 source "arch/arm/mach-ixp23xx/Kconfig"
612 source "arch/arm/mach-loki/Kconfig"
614 source "arch/arm/mach-mv78xx0/Kconfig"
616 source "arch/arm/mach-pxa/Kconfig"
618 source "arch/arm/mach-sa1100/Kconfig"
620 source "arch/arm/plat-omap/Kconfig"
622 source "arch/arm/mach-omap1/Kconfig"
624 source "arch/arm/mach-omap2/Kconfig"
626 source "arch/arm/mach-orion5x/Kconfig"
628 source "arch/arm/mach-kirkwood/Kconfig"
630 source "arch/arm/plat-s3c24xx/Kconfig"
631 source "arch/arm/plat-s3c64xx/Kconfig"
632 source "arch/arm/plat-s3c/Kconfig"
635 source "arch/arm/mach-s3c2400/Kconfig"
636 source "arch/arm/mach-s3c2410/Kconfig"
637 source "arch/arm/mach-s3c2412/Kconfig"
638 source "arch/arm/mach-s3c2440/Kconfig"
639 source "arch/arm/mach-s3c2442/Kconfig"
640 source "arch/arm/mach-s3c2443/Kconfig"
644 source "arch/arm/mach-s3c6400/Kconfig"
645 source "arch/arm/mach-s3c6410/Kconfig"
648 source "arch/arm/mach-lh7a40x/Kconfig"
650 source "arch/arm/mach-imx/Kconfig"
652 source "arch/arm/mach-h720x/Kconfig"
654 source "arch/arm/mach-versatile/Kconfig"
656 source "arch/arm/mach-aaec2000/Kconfig"
658 source "arch/arm/mach-realview/Kconfig"
660 source "arch/arm/mach-at91/Kconfig"
662 source "arch/arm/plat-mxc/Kconfig"
664 source "arch/arm/mach-netx/Kconfig"
666 source "arch/arm/mach-ns9xxx/Kconfig"
668 source "arch/arm/mach-davinci/Kconfig"
670 source "arch/arm/mach-ks8695/Kconfig"
672 source "arch/arm/mach-msm/Kconfig"
674 source "arch/arm/mach-w90x900/Kconfig"
676 # Definitions to make life easier
686 source arch/arm/mm/Kconfig
689 bool "Enable iWMMXt support"
690 depends on CPU_XSCALE || CPU_XSC3
691 default y if PXA27x || PXA3xx
693 Enable support for iWMMXt context switching at run time if
694 running on a CPU that supports it.
696 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
699 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
703 source "arch/arm/Kconfig-nommu"
708 source "arch/arm/common/Kconfig"
710 config FORCE_MAX_ZONEORDER
723 Find out whether you have ISA slots on your motherboard. ISA is the
724 name of a bus system, i.e. the way the CPU talks to the other stuff
725 inside your box. Other bus systems are PCI, EISA, MicroChannel
726 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
727 newer boards don't support it. If you have ISA, say Y, otherwise N.
729 # Select ISA DMA controller support
734 # Select ISA DMA interface
739 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
741 Find out whether you have a PCI motherboard. PCI is the name of a
742 bus system, i.e. the way the CPU talks to the other stuff inside
743 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
744 VESA. If you have PCI, say Y, otherwise N.
749 # Select the host bridge type
750 config PCI_HOST_VIA82C505
752 depends on PCI && ARCH_SHARK
755 config PCI_HOST_ITE8152
757 depends on PCI && MACH_ARMCORE
761 source "drivers/pci/Kconfig"
763 source "drivers/pcmcia/Kconfig"
767 menu "Kernel Features"
769 source "kernel/time/Kconfig"
772 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
773 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
774 select USE_GENERIC_SMP_HELPERS
776 This enables support for systems with more than one CPU. If you have
777 a system with only one CPU, like most personal computers, say N. If
778 you have a system with more than one CPU, say Y.
780 If you say N here, the kernel will run on single and multiprocessor
781 machines, but will use only one CPU of a multiprocessor machine. If
782 you say Y here, the kernel will run on many, but not all, single
783 processor machines. On a single processor machine, the kernel will
784 run faster if you say N here.
786 See also <file:Documentation/i386/IO-APIC.txt>,
787 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
788 <http://www.linuxdoc.org/docs.html#howto>.
790 If you don't know what to do here, say N.
793 prompt "Memory split"
796 Select the desired split between kernel and user memory.
798 If you are not absolutely sure what you are doing, leave this
802 bool "3G/1G user/kernel split"
804 bool "2G/2G user/kernel split"
806 bool "1G/3G user/kernel split"
811 default 0x40000000 if VMSPLIT_1G
812 default 0x80000000 if VMSPLIT_2G
816 int "Maximum number of CPUs (2-32)"
822 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
823 depends on SMP && HOTPLUG && EXPERIMENTAL
825 Say Y here to experiment with turning CPUs off and on. CPUs
826 can be controlled through /sys/devices/system/cpu.
829 bool "Use local timer interrupts"
830 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
833 Enable support for local timers on SMP platforms, rather then the
834 legacy IPI broadcast method. Local timers allows the system
835 accounting to be spread across the timer interval, preventing a
836 "thundering herd" at every timer tick.
839 bool "Preemptible Kernel (EXPERIMENTAL)"
840 depends on EXPERIMENTAL
842 This option reduces the latency of the kernel when reacting to
843 real-time or interactive events by allowing a low priority process to
844 be preempted even if it is in kernel mode executing a system call.
845 This allows applications to run more reliably even when the system is
848 Say Y here if you are building a kernel for a desktop, embedded
849 or real-time system. Say N if you are unsure.
853 default 128 if ARCH_L7200
854 default 200 if ARCH_EBSA110 || ARCH_S3C2410
855 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
856 default AT91_TIMER_HZ if ARCH_AT91
860 bool "Use the ARM EABI to compile the kernel"
862 This option allows for the kernel to be compiled using the latest
863 ARM ABI (aka EABI). This is only useful if you are using a user
864 space environment that is also compiled with EABI.
866 Since there are major incompatibilities between the legacy ABI and
867 EABI, especially with regard to structure member alignment, this
868 option also changes the kernel syscall calling convention to
869 disambiguate both ABIs and allow for backward compatibility support
870 (selected with CONFIG_OABI_COMPAT).
872 To use this you need GCC version 4.0.0 or later.
875 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
876 depends on AEABI && EXPERIMENTAL
879 This option preserves the old syscall interface along with the
880 new (ARM EABI) one. It also provides a compatibility layer to
881 intercept syscalls that have structure arguments which layout
882 in memory differs between the legacy ABI and the new ARM EABI
883 (only for non "thumb" binaries). This option adds a tiny
884 overhead to all syscalls and produces a slightly larger kernel.
885 If you know you'll be using only pure EABI user space then you
886 can say N here. If this option is not selected and you attempt
887 to execute a legacy ABI binary then the result will be
888 UNPREDICTABLE (in fact it can be predicted that it won't work
889 at all). If in doubt say Y.
891 config ARCH_FLATMEM_HAS_HOLES
896 # Discontigmem is deprecated
897 config ARCH_DISCONTIGMEM_ENABLE
900 config ARCH_SPARSEMEM_ENABLE
903 config ARCH_SPARSEMEM_DEFAULT
904 def_bool ARCH_SPARSEMEM_ENABLE
906 config ARCH_SELECT_MEMORY_MODEL
907 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
911 default "4" if ARCH_LH7A40X
913 depends on NEED_MULTIPLE_NODES
918 bool "Timer and CPU usage LEDs"
919 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
920 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
921 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
922 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
923 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
924 ARCH_AT91 || ARCH_DAVINCI || \
925 ARCH_KS8695 || MACH_RD88F5182
927 If you say Y here, the LEDs on your machine will be used
928 to provide useful information about your current system status.
930 If you are compiling a kernel for a NetWinder or EBSA-285, you will
931 be able to select which LEDs are active using the options below. If
932 you are compiling a kernel for the EBSA-110 or the LART however, the
933 red LED will simply flash regularly to indicate that the system is
934 still functional. It is safe to say Y here if you have a CATS
935 system, but the driver will do nothing.
938 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
939 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
940 || MACH_OMAP_PERSEUS2
942 depends on !GENERIC_CLOCKEVENTS
943 default y if ARCH_EBSA110
945 If you say Y here, one of the system LEDs (the green one on the
946 NetWinder, the amber one on the EBSA285, or the red one on the LART)
947 will flash regularly to indicate that the system is still
948 operational. This is mainly useful to kernel hackers who are
949 debugging unstable kernels.
951 The LART uses the same LED for both Timer LED and CPU usage LED
952 functions. You may choose to use both, but the Timer LED function
953 will overrule the CPU usage LED.
956 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
958 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
959 || MACH_OMAP_PERSEUS2
962 If you say Y here, the red LED will be used to give a good real
963 time indication of CPU usage, by lighting whenever the idle task
964 is not currently executing.
966 The LART uses the same LED for both Timer LED and CPU usage LED
967 functions. You may choose to use both, but the Timer LED function
968 will overrule the CPU usage LED.
970 config ALIGNMENT_TRAP
972 depends on CPU_CP15_MMU
973 default y if !ARCH_EBSA110
975 ARM processors cannot fetch/store information which is not
976 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
977 address divisible by 4. On 32-bit ARM processors, these non-aligned
978 fetch/store instructions will be emulated in software if you say
979 here, which has a severe performance impact. This is necessary for
980 correct operation of some network protocols. With an IP-only
981 configuration it is safe to say N, otherwise say Y.
987 # Compressed boot loader in ROM. Yes, we really want to ask about
988 # TEXT and BSS so we preserve their values in the config files.
989 config ZBOOT_ROM_TEXT
990 hex "Compressed ROM boot loader base address"
993 The physical address at which the ROM-able zImage is to be
994 placed in the target. Platforms which normally make use of
995 ROM-able zImage formats normally set this to a suitable
996 value in their defconfig file.
998 If ZBOOT_ROM is not enabled, this has no effect.
1000 config ZBOOT_ROM_BSS
1001 hex "Compressed ROM boot loader BSS address"
1004 The base address of an area of read/write memory in the target
1005 for the ROM-able zImage which must be available while the
1006 decompressor is running. It must be large enough to hold the
1007 entire decompressed kernel plus an additional 128 KiB.
1008 Platforms which normally make use of ROM-able zImage formats
1009 normally set this to a suitable value in their defconfig file.
1011 If ZBOOT_ROM is not enabled, this has no effect.
1014 bool "Compressed boot loader in ROM/flash"
1015 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1017 Say Y here if you intend to execute your compressed kernel image
1018 (zImage) directly from ROM or flash. If unsure, say N.
1021 string "Default kernel command string"
1024 On some architectures (EBSA110 and CATS), there is currently no way
1025 for the boot loader to pass arguments to the kernel. For these
1026 architectures, you should supply some command-line options at build
1027 time by entering them here. As a minimum, you should specify the
1028 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1031 bool "Kernel Execute-In-Place from ROM"
1032 depends on !ZBOOT_ROM
1034 Execute-In-Place allows the kernel to run from non-volatile storage
1035 directly addressable by the CPU, such as NOR flash. This saves RAM
1036 space since the text section of the kernel is not loaded from flash
1037 to RAM. Read-write sections, such as the data section and stack,
1038 are still copied to RAM. The XIP kernel is not compressed since
1039 it has to run directly from flash, so it will take more space to
1040 store it. The flash address used to link the kernel object files,
1041 and for storing it, is configuration dependent. Therefore, if you
1042 say Y here, you must know the proper physical address where to
1043 store the kernel image depending on your own flash memory usage.
1045 Also note that the make target becomes "make xipImage" rather than
1046 "make zImage" or "make Image". The final kernel binary to put in
1047 ROM memory will be arch/arm/boot/xipImage.
1051 config XIP_PHYS_ADDR
1052 hex "XIP Kernel Physical Location"
1053 depends on XIP_KERNEL
1054 default "0x00080000"
1056 This is the physical address in your flash memory the kernel will
1057 be linked for and stored to. This address is dependent on your
1061 bool "Kexec system call (EXPERIMENTAL)"
1062 depends on EXPERIMENTAL
1064 kexec is a system call that implements the ability to shutdown your
1065 current kernel, and to start another kernel. It is like a reboot
1066 but it is independent of the system firmware. And like a reboot
1067 you can start any kernel with it, not just Linux.
1069 It is an ongoing process to be certain the hardware in a machine
1070 is properly shutdown, so do not be surprised if this code does not
1071 initially work for you. It may help to enable device hotplugging
1075 bool "Export atags in procfs"
1079 Should the atags used to boot the kernel be exported in an "atags"
1080 file in procfs. Useful with kexec.
1084 menu "CPU Power Management"
1086 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1088 source "drivers/cpufreq/Kconfig"
1090 config CPU_FREQ_SA1100
1092 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1095 config CPU_FREQ_SA1110
1097 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1100 config CPU_FREQ_INTEGRATOR
1101 tristate "CPUfreq driver for ARM Integrator CPUs"
1102 depends on ARCH_INTEGRATOR && CPU_FREQ
1105 This enables the CPUfreq driver for ARM Integrator CPUs.
1107 For details, take a look at <file:Documentation/cpu-freq>.
1112 tristate "CPUfreq driver for i.MX CPUs"
1113 depends on ARCH_IMX && CPU_FREQ
1116 This enables the CPUfreq driver for i.MX CPUs.
1122 depends on CPU_FREQ && ARCH_PXA && PXA25x
1124 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1128 source "drivers/cpuidle/Kconfig"
1132 menu "Floating point emulation"
1134 comment "At least one emulation must be selected"
1137 bool "NWFPE math emulation"
1138 depends on !AEABI || OABI_COMPAT
1140 Say Y to include the NWFPE floating point emulator in the kernel.
1141 This is necessary to run most binaries. Linux does not currently
1142 support floating point hardware so you need to say Y here even if
1143 your machine has an FPA or floating point co-processor podule.
1145 You may say N here if you are going to load the Acorn FPEmulator
1146 early in the bootup.
1149 bool "Support extended precision"
1150 depends on FPE_NWFPE
1152 Say Y to include 80-bit support in the kernel floating-point
1153 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1154 Note that gcc does not generate 80-bit operations by default,
1155 so in most cases this option only enlarges the size of the
1156 floating point emulator without any good reason.
1158 You almost surely want to say N here.
1161 bool "FastFPE math emulation (EXPERIMENTAL)"
1162 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1164 Say Y here to include the FAST floating point emulator in the kernel.
1165 This is an experimental much faster emulator which now also has full
1166 precision for the mantissa. It does not support any exceptions.
1167 It is very simple, and approximately 3-6 times faster than NWFPE.
1169 It should be sufficient for most programs. It may be not suitable
1170 for scientific calculations, but you have to check this for yourself.
1171 If you do not feel you need a faster FP emulation you should better
1175 bool "VFP-format floating point maths"
1176 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1178 Say Y to include VFP support code in the kernel. This is needed
1179 if your hardware includes a VFP unit.
1181 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1182 release notes and additional status information.
1184 Say N if your target does not have VFP hardware.
1192 bool "Advanced SIMD (NEON) Extension support"
1193 depends on VFPv3 && CPU_V7
1195 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1200 menu "Userspace binary formats"
1202 source "fs/Kconfig.binfmt"
1205 tristate "RISC OS personality"
1208 Say Y here to include the kernel code necessary if you want to run
1209 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1210 experimental; if this sounds frightening, say N and sleep in peace.
1211 You can also say M here to compile this support as a module (which
1212 will be called arthur).
1216 menu "Power management options"
1218 source "kernel/power/Kconfig"
1220 config ARCH_SUSPEND_POSSIBLE
1225 source "net/Kconfig"
1227 menu "Device Drivers"
1229 source "drivers/base/Kconfig"
1231 source "drivers/connector/Kconfig"
1233 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1234 source "drivers/mtd/Kconfig"
1237 source "drivers/parport/Kconfig"
1239 source "drivers/pnp/Kconfig"
1241 source "drivers/block/Kconfig"
1243 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1245 source "drivers/misc/Kconfig"
1247 source "drivers/ide/Kconfig"
1249 source "drivers/scsi/Kconfig"
1251 source "drivers/ata/Kconfig"
1253 source "drivers/md/Kconfig"
1255 source "drivers/message/fusion/Kconfig"
1257 source "drivers/ieee1394/Kconfig"
1259 source "drivers/message/i2o/Kconfig"
1261 source "drivers/net/Kconfig"
1263 source "drivers/isdn/Kconfig"
1265 # input before char - char/joystick depends on it. As does USB.
1267 source "drivers/input/Kconfig"
1269 source "drivers/char/Kconfig"
1271 source "drivers/i2c/Kconfig"
1273 source "drivers/spi/Kconfig"
1275 source "drivers/gpio/Kconfig"
1277 source "drivers/w1/Kconfig"
1279 source "drivers/power/Kconfig"
1281 source "drivers/hwmon/Kconfig"
1283 source "drivers/thermal/Kconfig"
1285 source "drivers/watchdog/Kconfig"
1287 source "drivers/ssb/Kconfig"
1289 #source "drivers/l3/Kconfig"
1291 source "drivers/mfd/Kconfig"
1293 source "drivers/media/Kconfig"
1295 source "drivers/video/Kconfig"
1297 source "sound/Kconfig"
1299 source "drivers/hid/Kconfig"
1301 source "drivers/usb/Kconfig"
1303 source "drivers/uwb/Kconfig"
1305 source "drivers/mmc/Kconfig"
1307 source "drivers/memstick/Kconfig"
1309 source "drivers/accessibility/Kconfig"
1311 source "drivers/leds/Kconfig"
1313 source "drivers/rtc/Kconfig"
1315 source "drivers/dma/Kconfig"
1317 source "drivers/dca/Kconfig"
1319 source "drivers/auxdisplay/Kconfig"
1321 source "drivers/regulator/Kconfig"
1323 source "drivers/uio/Kconfig"
1329 source "arch/arm/Kconfig.debug"
1331 source "security/Kconfig"
1333 source "crypto/Kconfig"
1335 source "lib/Kconfig"