2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
6 mainmenu "Linux Kernel Configuration"
13 select SYS_SUPPORTS_APM_EMULATION
16 select HAVE_KPROBES if (!XIP_KERNEL)
17 select HAVE_KRETPROBES if (HAVE_KPROBES)
18 select HAVE_FTRACE if (!XIP_KERNEL)
19 select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
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_SUPPORTS_AOUT
146 config ARCH_MAY_HAVE_PC_FDC
153 config GENERIC_ISA_DMA
162 config GENERIC_HARDIRQS_NO__DO_IRQ
168 config OPROFILE_ARMV6
170 depends on CPU_V6 && !SMP
171 select OPROFILE_ARM11_CORE
173 config OPROFILE_MPCORE
175 depends on CPU_V6 && SMP
176 select OPROFILE_ARM11_CORE
178 config OPROFILE_ARM11_CORE
181 config OPROFILE_ARMV7
183 depends on CPU_V7 && !SMP
190 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
191 default DRAM_BASE if REMAP_VECTORS_TO_RAM
194 The base address of exception vectors.
196 source "init/Kconfig"
201 prompt "ARM system type"
202 default ARCH_VERSATILE
205 bool "Agilent AAEC-2000 based"
209 This enables support for systems based on the Agilent AAEC-2000
211 config ARCH_INTEGRATOR
212 bool "ARM Ltd. Integrator family"
217 Support for ARM's Integrator platform.
220 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"
236 select GENERIC_CLOCKEVENTS
238 This enables support for ARM Ltd Versatile board.
245 This enables support for systems based on the Atmel AT91RM9200,
246 AT91SAM9 and AT91CAP9 processors.
249 bool "Cirrus CL-PS7500FE"
253 select ARCH_SPARSEMEM_ENABLE
255 Support for the Cirrus Logic PS7500FE system-on-a-chip.
258 bool "Cirrus Logic CLPS711x/EP721x-based"
260 Support for Cirrus Logic 711x/721x based boards.
267 This is an evaluation board for the StrongARM processor available
268 from Digital. It has limited hardware on-board, including an
269 Ethernet interface, two PCMCIA sockets, two serial ports and a
278 select ARCH_REQUIRE_GPIOLIB
280 This enables support for the Cirrus EP93xx series of CPUs.
282 config ARCH_FOOTBRIDGE
286 Support for systems based on the DC21285 companion chip
287 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
290 bool "Hilscher NetX based"
293 This enables support for systems based on the Hilscher NetX Soc
296 bool "Hynix HMS720x-based"
299 This enables support for systems based on the Hynix HMS720x
305 select GENERIC_CLOCKEVENTS
307 Support for Motorola's i.MX family of processors (MX1, MXL).
314 select ARCH_SUPPORTS_MSI
317 Support for Intel's IOP13XX (XScale) family of processors.
325 select ARCH_REQUIRE_GPIOLIB
327 Support for Intel's 80219 and IOP32X (XScale) family of
336 select ARCH_REQUIRE_GPIOLIB
338 Support for Intel's IOP33X (XScale) family of processors.
345 Support for Intel's IXP23xx (XScale) family of processors.
348 bool "IXP2400/2800-based"
352 Support for Intel's IXP2400/2800 (XScale) family of processors.
359 select GENERIC_CLOCKEVENTS
361 Support for Intel's IXP4XX (XScale) family of processors.
367 Say Y here if you intend to run this kernel on a LinkUp Systems
368 L7200 Software Development Board which uses an ARM720T processor.
369 Information on this board can be obtained at:
371 <http://www.linkupsys.com/>
373 If you have any questions or comments about the Linux kernel port
374 to this board, send e-mail to <sjhill@cotw.com>.
377 bool "Marvell Kirkwood"
380 select GENERIC_CLOCKEVENTS
383 Support for the following Marvell Kirkwood series SoCs:
384 88F6180, 88F6192 and 88F6281.
387 bool "Micrel/Kendin KS8695"
390 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
391 System-on-Chip devices.
394 bool "NetSilicon NS9xxx"
397 select GENERIC_CLOCKEVENTS
400 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
403 <http://www.digi.com/products/microprocessors/index.jsp>
406 bool "Marvell Loki (88RC8480)"
408 select GENERIC_CLOCKEVENTS
411 Support for the Marvell Loki (88RC8480) SoC.
414 bool "Marvell MV78xx0"
417 select GENERIC_CLOCKEVENTS
420 Support for the following Marvell MV78xx0 series SoCs:
424 bool "Freescale MXC/iMX-based"
426 select GENERIC_CLOCKEVENTS
429 select ARCH_REQUIRE_GPIOLIB
431 Support for Freescale MXC/iMX-based family of processors
439 select GENERIC_CLOCKEVENTS
442 Support for the following Marvell Orion 5x series SoCs:
443 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
447 bool "Philips Nexperia PNX4008 Mobile"
450 This enables support for Philips PNX4008 mobile platform.
453 bool "PXA2xx/PXA3xx-based"
458 select ARCH_REQUIRE_GPIOLIB
460 select GENERIC_CLOCKEVENTS
463 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
470 select ARCH_MAY_HAVE_PC_FDC
471 select HAVE_PATA_PLATFORM
474 select ARCH_SPARSEMEM_ENABLE
476 On the Acorn Risc-PC, Linux can support the internal IDE disk and
477 CD-ROM interface, serial and parallel port, and the floppy drive.
482 select ARCH_SPARSEMEM_ENABLE
486 select GENERIC_CLOCKEVENTS
489 select ARCH_REQUIRE_GPIOLIB
491 Support for StrongARM 11x0 based boards.
494 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
498 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
499 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
500 the Samsung SMDK2410 development board (and derivatives).
508 Support for the StrongARM based Digital DNARD machine, also known
509 as "Shark" (<http://www.shark-linux.de/shark.html>).
514 Say Y here for systems based on one of the Sharp LH7A40X
515 System on a Chip processors. These CPUs include an ARM922T
516 core with a wide array of integrated devices for
517 hand-held and low-power applications.
522 select GENERIC_CLOCKEVENTS
526 Support for TI's DaVinci platform.
532 select ARCH_REQUIRE_GPIOLIB
534 select GENERIC_CLOCKEVENTS
536 Support for TI's OMAP platform (OMAP1 and OMAP2).
539 bool "Qualcomm MSM7X00A"
541 select GENERIC_CLOCKEVENTS
543 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
544 apps processor of the MSM7X00A and depends on a shared memory
545 interface to the ARM9 modem processor which runs the baseband stack
546 and controls some vital subsystems (clock and power control, etc).
547 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
551 source "arch/arm/mach-clps711x/Kconfig"
553 source "arch/arm/mach-ep93xx/Kconfig"
555 source "arch/arm/mach-footbridge/Kconfig"
557 source "arch/arm/mach-integrator/Kconfig"
559 source "arch/arm/mach-iop32x/Kconfig"
561 source "arch/arm/mach-iop33x/Kconfig"
563 source "arch/arm/mach-iop13xx/Kconfig"
565 source "arch/arm/mach-ixp4xx/Kconfig"
567 source "arch/arm/mach-ixp2000/Kconfig"
569 source "arch/arm/mach-ixp23xx/Kconfig"
571 source "arch/arm/mach-loki/Kconfig"
573 source "arch/arm/mach-mv78xx0/Kconfig"
575 source "arch/arm/mach-pxa/Kconfig"
577 source "arch/arm/mach-sa1100/Kconfig"
579 source "arch/arm/plat-omap/Kconfig"
581 source "arch/arm/mach-omap1/Kconfig"
583 source "arch/arm/mach-omap2/Kconfig"
585 source "arch/arm/mach-orion5x/Kconfig"
587 source "arch/arm/mach-kirkwood/Kconfig"
589 source "arch/arm/plat-s3c24xx/Kconfig"
590 source "arch/arm/plat-s3c/Kconfig"
593 source "arch/arm/mach-s3c2400/Kconfig"
594 source "arch/arm/mach-s3c2410/Kconfig"
595 source "arch/arm/mach-s3c2412/Kconfig"
596 source "arch/arm/mach-s3c2440/Kconfig"
597 source "arch/arm/mach-s3c2442/Kconfig"
598 source "arch/arm/mach-s3c2443/Kconfig"
601 source "arch/arm/mach-lh7a40x/Kconfig"
603 source "arch/arm/mach-imx/Kconfig"
605 source "arch/arm/mach-h720x/Kconfig"
607 source "arch/arm/mach-versatile/Kconfig"
609 source "arch/arm/mach-aaec2000/Kconfig"
611 source "arch/arm/mach-realview/Kconfig"
613 source "arch/arm/mach-at91/Kconfig"
615 source "arch/arm/plat-mxc/Kconfig"
617 source "arch/arm/mach-netx/Kconfig"
619 source "arch/arm/mach-ns9xxx/Kconfig"
621 source "arch/arm/mach-davinci/Kconfig"
623 source "arch/arm/mach-ks8695/Kconfig"
625 source "arch/arm/mach-msm/Kconfig"
627 # Definitions to make life easier
637 source arch/arm/mm/Kconfig
640 bool "Enable iWMMXt support"
641 depends on CPU_XSCALE || CPU_XSC3
642 default y if PXA27x || PXA3xx
644 Enable support for iWMMXt context switching at run time if
645 running on a CPU that supports it.
647 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
650 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
654 source "arch/arm/Kconfig-nommu"
659 source "arch/arm/common/Kconfig"
661 config FORCE_MAX_ZONEORDER
674 Find out whether you have ISA slots on your motherboard. ISA is the
675 name of a bus system, i.e. the way the CPU talks to the other stuff
676 inside your box. Other bus systems are PCI, EISA, MicroChannel
677 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
678 newer boards don't support it. If you have ISA, say Y, otherwise N.
680 # Select ISA DMA controller support
685 # Select ISA DMA interface
690 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
692 Find out whether you have a PCI motherboard. PCI is the name of a
693 bus system, i.e. the way the CPU talks to the other stuff inside
694 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
695 VESA. If you have PCI, say Y, otherwise N.
700 # Select the host bridge type
701 config PCI_HOST_VIA82C505
703 depends on PCI && ARCH_SHARK
706 config PCI_HOST_ITE8152
708 depends on PCI && MACH_ARMCORE
712 source "drivers/pci/Kconfig"
714 source "drivers/pcmcia/Kconfig"
718 menu "Kernel Features"
720 source "kernel/time/Kconfig"
723 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
724 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
725 select USE_GENERIC_SMP_HELPERS
727 This enables support for systems with more than one CPU. If you have
728 a system with only one CPU, like most personal computers, say N. If
729 you have a system with more than one CPU, say Y.
731 If you say N here, the kernel will run on single and multiprocessor
732 machines, but will use only one CPU of a multiprocessor machine. If
733 you say Y here, the kernel will run on many, but not all, single
734 processor machines. On a single processor machine, the kernel will
735 run faster if you say N here.
737 See also <file:Documentation/i386/IO-APIC.txt>,
738 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
739 <http://www.linuxdoc.org/docs.html#howto>.
741 If you don't know what to do here, say N.
744 prompt "Memory split"
747 Select the desired split between kernel and user memory.
749 If you are not absolutely sure what you are doing, leave this
753 bool "3G/1G user/kernel split"
755 bool "2G/2G user/kernel split"
757 bool "1G/3G user/kernel split"
762 default 0x40000000 if VMSPLIT_1G
763 default 0x80000000 if VMSPLIT_2G
767 int "Maximum number of CPUs (2-32)"
773 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
774 depends on SMP && HOTPLUG && EXPERIMENTAL
776 Say Y here to experiment with turning CPUs off and on. CPUs
777 can be controlled through /sys/devices/system/cpu.
780 bool "Use local timer interrupts"
781 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
784 Enable support for local timers on SMP platforms, rather then the
785 legacy IPI broadcast method. Local timers allows the system
786 accounting to be spread across the timer interval, preventing a
787 "thundering herd" at every timer tick.
790 bool "Preemptible Kernel (EXPERIMENTAL)"
791 depends on EXPERIMENTAL
793 This option reduces the latency of the kernel when reacting to
794 real-time or interactive events by allowing a low priority process to
795 be preempted even if it is in kernel mode executing a system call.
796 This allows applications to run more reliably even when the system is
799 Say Y here if you are building a kernel for a desktop, embedded
800 or real-time system. Say N if you are unsure.
804 default 128 if ARCH_L7200
805 default 200 if ARCH_EBSA110 || ARCH_S3C2410
806 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
807 default AT91_TIMER_HZ if ARCH_AT91
811 bool "Use the ARM EABI to compile the kernel"
813 This option allows for the kernel to be compiled using the latest
814 ARM ABI (aka EABI). This is only useful if you are using a user
815 space environment that is also compiled with EABI.
817 Since there are major incompatibilities between the legacy ABI and
818 EABI, especially with regard to structure member alignment, this
819 option also changes the kernel syscall calling convention to
820 disambiguate both ABIs and allow for backward compatibility support
821 (selected with CONFIG_OABI_COMPAT).
823 To use this you need GCC version 4.0.0 or later.
826 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
827 depends on AEABI && EXPERIMENTAL
830 This option preserves the old syscall interface along with the
831 new (ARM EABI) one. It also provides a compatibility layer to
832 intercept syscalls that have structure arguments which layout
833 in memory differs between the legacy ABI and the new ARM EABI
834 (only for non "thumb" binaries). This option adds a tiny
835 overhead to all syscalls and produces a slightly larger kernel.
836 If you know you'll be using only pure EABI user space then you
837 can say N here. If this option is not selected and you attempt
838 to execute a legacy ABI binary then the result will be
839 UNPREDICTABLE (in fact it can be predicted that it won't work
840 at all). If in doubt say Y.
842 # Discontigmem is deprecated
843 config ARCH_DISCONTIGMEM_ENABLE
845 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
847 Say Y to support efficient handling of discontiguous physical memory,
848 for architectures which are either NUMA (Non-Uniform Memory Access)
849 or have huge holes in the physical address space for other reasons.
850 See <file:Documentation/vm/numa> for more.
852 config ARCH_SPARSEMEM_ENABLE
855 config ARCH_SPARSEMEM_DEFAULT
856 def_bool ARCH_SPARSEMEM_ENABLE
858 config ARCH_SELECT_MEMORY_MODEL
859 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
863 default "4" if ARCH_LH7A40X
865 depends on NEED_MULTIPLE_NODES
870 bool "Timer and CPU usage LEDs"
871 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
872 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
873 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
874 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
875 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
876 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
877 ARCH_KS8695 || MACH_RD88F5182
879 If you say Y here, the LEDs on your machine will be used
880 to provide useful information about your current system status.
882 If you are compiling a kernel for a NetWinder or EBSA-285, you will
883 be able to select which LEDs are active using the options below. If
884 you are compiling a kernel for the EBSA-110 or the LART however, the
885 red LED will simply flash regularly to indicate that the system is
886 still functional. It is safe to say Y here if you have a CATS
887 system, but the driver will do nothing.
890 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
891 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
892 || MACH_OMAP_PERSEUS2
894 depends on !GENERIC_CLOCKEVENTS
895 default y if ARCH_EBSA110
897 If you say Y here, one of the system LEDs (the green one on the
898 NetWinder, the amber one on the EBSA285, or the red one on the LART)
899 will flash regularly to indicate that the system is still
900 operational. This is mainly useful to kernel hackers who are
901 debugging unstable kernels.
903 The LART uses the same LED for both Timer LED and CPU usage LED
904 functions. You may choose to use both, but the Timer LED function
905 will overrule the CPU usage LED.
908 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
910 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
911 || MACH_OMAP_PERSEUS2
914 If you say Y here, the red LED will be used to give a good real
915 time indication of CPU usage, by lighting whenever the idle task
916 is not currently executing.
918 The LART uses the same LED for both Timer LED and CPU usage LED
919 functions. You may choose to use both, but the Timer LED function
920 will overrule the CPU usage LED.
922 config ALIGNMENT_TRAP
924 depends on CPU_CP15_MMU
925 default y if !ARCH_EBSA110
927 ARM processors cannot fetch/store information which is not
928 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
929 address divisible by 4. On 32-bit ARM processors, these non-aligned
930 fetch/store instructions will be emulated in software if you say
931 here, which has a severe performance impact. This is necessary for
932 correct operation of some network protocols. With an IP-only
933 configuration it is safe to say N, otherwise say Y.
939 # Compressed boot loader in ROM. Yes, we really want to ask about
940 # TEXT and BSS so we preserve their values in the config files.
941 config ZBOOT_ROM_TEXT
942 hex "Compressed ROM boot loader base address"
945 The physical address at which the ROM-able zImage is to be
946 placed in the target. Platforms which normally make use of
947 ROM-able zImage formats normally set this to a suitable
948 value in their defconfig file.
950 If ZBOOT_ROM is not enabled, this has no effect.
953 hex "Compressed ROM boot loader BSS address"
956 The base address of an area of read/write memory in the target
957 for the ROM-able zImage which must be available while the
958 decompressor is running. It must be large enough to hold the
959 entire decompressed kernel plus an additional 128 KiB.
960 Platforms which normally make use of ROM-able zImage formats
961 normally set this to a suitable value in their defconfig file.
963 If ZBOOT_ROM is not enabled, this has no effect.
966 bool "Compressed boot loader in ROM/flash"
967 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
969 Say Y here if you intend to execute your compressed kernel image
970 (zImage) directly from ROM or flash. If unsure, say N.
973 string "Default kernel command string"
976 On some architectures (EBSA110 and CATS), there is currently no way
977 for the boot loader to pass arguments to the kernel. For these
978 architectures, you should supply some command-line options at build
979 time by entering them here. As a minimum, you should specify the
980 memory size and the root device (e.g., mem=64M root=/dev/nfs).
983 bool "Kernel Execute-In-Place from ROM"
984 depends on !ZBOOT_ROM
986 Execute-In-Place allows the kernel to run from non-volatile storage
987 directly addressable by the CPU, such as NOR flash. This saves RAM
988 space since the text section of the kernel is not loaded from flash
989 to RAM. Read-write sections, such as the data section and stack,
990 are still copied to RAM. The XIP kernel is not compressed since
991 it has to run directly from flash, so it will take more space to
992 store it. The flash address used to link the kernel object files,
993 and for storing it, is configuration dependent. Therefore, if you
994 say Y here, you must know the proper physical address where to
995 store the kernel image depending on your own flash memory usage.
997 Also note that the make target becomes "make xipImage" rather than
998 "make zImage" or "make Image". The final kernel binary to put in
999 ROM memory will be arch/arm/boot/xipImage.
1003 config XIP_PHYS_ADDR
1004 hex "XIP Kernel Physical Location"
1005 depends on XIP_KERNEL
1006 default "0x00080000"
1008 This is the physical address in your flash memory the kernel will
1009 be linked for and stored to. This address is dependent on your
1013 bool "Kexec system call (EXPERIMENTAL)"
1014 depends on EXPERIMENTAL
1016 kexec is a system call that implements the ability to shutdown your
1017 current kernel, and to start another kernel. It is like a reboot
1018 but it is independent of the system firmware. And like a reboot
1019 you can start any kernel with it, not just Linux.
1021 It is an ongoing process to be certain the hardware in a machine
1022 is properly shutdown, so do not be surprised if this code does not
1023 initially work for you. It may help to enable device hotplugging
1027 bool "Export atags in procfs"
1031 Should the atags used to boot the kernel be exported in an "atags"
1032 file in procfs. Useful with kexec.
1036 menu "CPU Power Management"
1038 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1040 source "drivers/cpufreq/Kconfig"
1042 config CPU_FREQ_SA1100
1044 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1047 config CPU_FREQ_SA1110
1049 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1052 config CPU_FREQ_INTEGRATOR
1053 tristate "CPUfreq driver for ARM Integrator CPUs"
1054 depends on ARCH_INTEGRATOR && CPU_FREQ
1057 This enables the CPUfreq driver for ARM Integrator CPUs.
1059 For details, take a look at <file:Documentation/cpu-freq>.
1064 tristate "CPUfreq driver for i.MX CPUs"
1065 depends on ARCH_IMX && CPU_FREQ
1068 This enables the CPUfreq driver for i.MX CPUs.
1074 depends on CPU_FREQ && ARCH_PXA && PXA25x
1076 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1080 source "drivers/cpuidle/Kconfig"
1084 menu "Floating point emulation"
1086 comment "At least one emulation must be selected"
1089 bool "NWFPE math emulation"
1090 depends on !AEABI || OABI_COMPAT
1092 Say Y to include the NWFPE floating point emulator in the kernel.
1093 This is necessary to run most binaries. Linux does not currently
1094 support floating point hardware so you need to say Y here even if
1095 your machine has an FPA or floating point co-processor podule.
1097 You may say N here if you are going to load the Acorn FPEmulator
1098 early in the bootup.
1101 bool "Support extended precision"
1102 depends on FPE_NWFPE
1104 Say Y to include 80-bit support in the kernel floating-point
1105 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1106 Note that gcc does not generate 80-bit operations by default,
1107 so in most cases this option only enlarges the size of the
1108 floating point emulator without any good reason.
1110 You almost surely want to say N here.
1113 bool "FastFPE math emulation (EXPERIMENTAL)"
1114 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1116 Say Y here to include the FAST floating point emulator in the kernel.
1117 This is an experimental much faster emulator which now also has full
1118 precision for the mantissa. It does not support any exceptions.
1119 It is very simple, and approximately 3-6 times faster than NWFPE.
1121 It should be sufficient for most programs. It may be not suitable
1122 for scientific calculations, but you have to check this for yourself.
1123 If you do not feel you need a faster FP emulation you should better
1127 bool "VFP-format floating point maths"
1128 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1130 Say Y to include VFP support code in the kernel. This is needed
1131 if your hardware includes a VFP unit.
1133 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1134 release notes and additional status information.
1136 Say N if your target does not have VFP hardware.
1144 bool "Advanced SIMD (NEON) Extension support"
1145 depends on VFPv3 && CPU_V7
1147 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1152 menu "Userspace binary formats"
1154 source "fs/Kconfig.binfmt"
1157 tristate "RISC OS personality"
1160 Say Y here to include the kernel code necessary if you want to run
1161 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1162 experimental; if this sounds frightening, say N and sleep in peace.
1163 You can also say M here to compile this support as a module (which
1164 will be called arthur).
1168 menu "Power management options"
1170 source "kernel/power/Kconfig"
1172 config ARCH_SUSPEND_POSSIBLE
1177 source "net/Kconfig"
1179 menu "Device Drivers"
1181 source "drivers/base/Kconfig"
1183 source "drivers/connector/Kconfig"
1185 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1186 source "drivers/mtd/Kconfig"
1189 source "drivers/parport/Kconfig"
1191 source "drivers/pnp/Kconfig"
1193 source "drivers/block/Kconfig"
1195 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1197 source "drivers/misc/Kconfig"
1199 source "drivers/ide/Kconfig"
1201 source "drivers/scsi/Kconfig"
1203 source "drivers/ata/Kconfig"
1205 source "drivers/md/Kconfig"
1207 source "drivers/message/fusion/Kconfig"
1209 source "drivers/ieee1394/Kconfig"
1211 source "drivers/message/i2o/Kconfig"
1213 source "drivers/net/Kconfig"
1215 source "drivers/isdn/Kconfig"
1217 # input before char - char/joystick depends on it. As does USB.
1219 source "drivers/input/Kconfig"
1221 source "drivers/char/Kconfig"
1223 source "drivers/i2c/Kconfig"
1225 source "drivers/spi/Kconfig"
1227 source "drivers/gpio/Kconfig"
1229 source "drivers/w1/Kconfig"
1231 source "drivers/power/Kconfig"
1233 source "drivers/hwmon/Kconfig"
1235 source "drivers/thermal/Kconfig"
1237 source "drivers/watchdog/Kconfig"
1239 source "drivers/ssb/Kconfig"
1241 #source "drivers/l3/Kconfig"
1243 source "drivers/mfd/Kconfig"
1245 source "drivers/media/Kconfig"
1247 source "drivers/video/Kconfig"
1249 source "sound/Kconfig"
1251 source "drivers/hid/Kconfig"
1253 source "drivers/usb/Kconfig"
1255 source "drivers/mmc/Kconfig"
1257 source "drivers/memstick/Kconfig"
1259 source "drivers/accessibility/Kconfig"
1261 source "drivers/leds/Kconfig"
1263 source "drivers/rtc/Kconfig"
1265 source "drivers/dma/Kconfig"
1267 source "drivers/dca/Kconfig"
1269 source "drivers/auxdisplay/Kconfig"
1271 source "drivers/regulator/Kconfig"
1273 source "drivers/uio/Kconfig"
1279 source "arch/arm/Kconfig.debug"
1281 source "security/Kconfig"
1283 source "crypto/Kconfig"
1285 source "lib/Kconfig"