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).
529 Support for the StrongARM based Digital DNARD machine, also known
530 as "Shark" (<http://www.shark-linux.de/shark.html>).
535 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
536 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
538 Say Y here for systems based on one of the Sharp LH7A40X
539 System on a Chip processors. These CPUs include an ARM922T
540 core with a wide array of integrated devices for
541 hand-held and low-power applications.
547 select GENERIC_CLOCKEVENTS
549 select ARCH_REQUIRE_GPIOLIB
553 Support for TI's DaVinci platform.
559 select ARCH_REQUIRE_GPIOLIB
561 select GENERIC_CLOCKEVENTS
563 Support for TI's OMAP platform (OMAP1 and OMAP2).
569 select GENERIC_CLOCKEVENTS
571 Support for Qualcomm MSM7K based systems. This runs on the ARM11
572 apps processor of the MSM7K and depends on a shared memory
573 interface to the ARM9 modem processor which runs the baseband stack
574 and controls some vital subsystems (clock and power control, etc).
577 bool "Nuvoton W90X900 CPU"
580 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
581 can login www.mcuos.com or www.nuvoton.com to know more.
585 source "arch/arm/mach-clps711x/Kconfig"
587 source "arch/arm/mach-ep93xx/Kconfig"
589 source "arch/arm/mach-footbridge/Kconfig"
591 source "arch/arm/mach-integrator/Kconfig"
593 source "arch/arm/mach-iop32x/Kconfig"
595 source "arch/arm/mach-iop33x/Kconfig"
597 source "arch/arm/mach-iop13xx/Kconfig"
599 source "arch/arm/mach-ixp4xx/Kconfig"
601 source "arch/arm/mach-ixp2000/Kconfig"
603 source "arch/arm/mach-ixp23xx/Kconfig"
605 source "arch/arm/mach-loki/Kconfig"
607 source "arch/arm/mach-mv78xx0/Kconfig"
609 source "arch/arm/mach-pxa/Kconfig"
611 source "arch/arm/mach-sa1100/Kconfig"
613 source "arch/arm/plat-omap/Kconfig"
615 source "arch/arm/mach-omap1/Kconfig"
617 source "arch/arm/mach-omap2/Kconfig"
619 source "arch/arm/mach-orion5x/Kconfig"
621 source "arch/arm/mach-kirkwood/Kconfig"
623 source "arch/arm/plat-s3c24xx/Kconfig"
624 source "arch/arm/plat-s3c/Kconfig"
627 source "arch/arm/mach-s3c2400/Kconfig"
628 source "arch/arm/mach-s3c2410/Kconfig"
629 source "arch/arm/mach-s3c2412/Kconfig"
630 source "arch/arm/mach-s3c2440/Kconfig"
631 source "arch/arm/mach-s3c2442/Kconfig"
632 source "arch/arm/mach-s3c2443/Kconfig"
635 source "arch/arm/mach-lh7a40x/Kconfig"
637 source "arch/arm/mach-imx/Kconfig"
639 source "arch/arm/mach-h720x/Kconfig"
641 source "arch/arm/mach-versatile/Kconfig"
643 source "arch/arm/mach-aaec2000/Kconfig"
645 source "arch/arm/mach-realview/Kconfig"
647 source "arch/arm/mach-at91/Kconfig"
649 source "arch/arm/plat-mxc/Kconfig"
651 source "arch/arm/mach-netx/Kconfig"
653 source "arch/arm/mach-ns9xxx/Kconfig"
655 source "arch/arm/mach-davinci/Kconfig"
657 source "arch/arm/mach-ks8695/Kconfig"
659 source "arch/arm/mach-msm/Kconfig"
661 source "arch/arm/mach-w90x900/Kconfig"
663 # Definitions to make life easier
673 source arch/arm/mm/Kconfig
676 bool "Enable iWMMXt support"
677 depends on CPU_XSCALE || CPU_XSC3
678 default y if PXA27x || PXA3xx
680 Enable support for iWMMXt context switching at run time if
681 running on a CPU that supports it.
683 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
686 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
690 source "arch/arm/Kconfig-nommu"
695 source "arch/arm/common/Kconfig"
697 config FORCE_MAX_ZONEORDER
710 Find out whether you have ISA slots on your motherboard. ISA is the
711 name of a bus system, i.e. the way the CPU talks to the other stuff
712 inside your box. Other bus systems are PCI, EISA, MicroChannel
713 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
714 newer boards don't support it. If you have ISA, say Y, otherwise N.
716 # Select ISA DMA controller support
721 # Select ISA DMA interface
726 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
728 Find out whether you have a PCI motherboard. PCI is the name of a
729 bus system, i.e. the way the CPU talks to the other stuff inside
730 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
731 VESA. If you have PCI, say Y, otherwise N.
736 # Select the host bridge type
737 config PCI_HOST_VIA82C505
739 depends on PCI && ARCH_SHARK
742 config PCI_HOST_ITE8152
744 depends on PCI && MACH_ARMCORE
748 source "drivers/pci/Kconfig"
750 source "drivers/pcmcia/Kconfig"
754 menu "Kernel Features"
756 source "kernel/time/Kconfig"
759 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
760 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
761 select USE_GENERIC_SMP_HELPERS
763 This enables support for systems with more than one CPU. If you have
764 a system with only one CPU, like most personal computers, say N. If
765 you have a system with more than one CPU, say Y.
767 If you say N here, the kernel will run on single and multiprocessor
768 machines, but will use only one CPU of a multiprocessor machine. If
769 you say Y here, the kernel will run on many, but not all, single
770 processor machines. On a single processor machine, the kernel will
771 run faster if you say N here.
773 See also <file:Documentation/i386/IO-APIC.txt>,
774 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
775 <http://www.linuxdoc.org/docs.html#howto>.
777 If you don't know what to do here, say N.
780 prompt "Memory split"
783 Select the desired split between kernel and user memory.
785 If you are not absolutely sure what you are doing, leave this
789 bool "3G/1G user/kernel split"
791 bool "2G/2G user/kernel split"
793 bool "1G/3G user/kernel split"
798 default 0x40000000 if VMSPLIT_1G
799 default 0x80000000 if VMSPLIT_2G
803 int "Maximum number of CPUs (2-32)"
809 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
810 depends on SMP && HOTPLUG && EXPERIMENTAL
812 Say Y here to experiment with turning CPUs off and on. CPUs
813 can be controlled through /sys/devices/system/cpu.
816 bool "Use local timer interrupts"
817 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
820 Enable support for local timers on SMP platforms, rather then the
821 legacy IPI broadcast method. Local timers allows the system
822 accounting to be spread across the timer interval, preventing a
823 "thundering herd" at every timer tick.
826 bool "Preemptible Kernel (EXPERIMENTAL)"
827 depends on EXPERIMENTAL
829 This option reduces the latency of the kernel when reacting to
830 real-time or interactive events by allowing a low priority process to
831 be preempted even if it is in kernel mode executing a system call.
832 This allows applications to run more reliably even when the system is
835 Say Y here if you are building a kernel for a desktop, embedded
836 or real-time system. Say N if you are unsure.
840 default 128 if ARCH_L7200
841 default 200 if ARCH_EBSA110 || ARCH_S3C2410
842 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
843 default AT91_TIMER_HZ if ARCH_AT91
847 bool "Use the ARM EABI to compile the kernel"
849 This option allows for the kernel to be compiled using the latest
850 ARM ABI (aka EABI). This is only useful if you are using a user
851 space environment that is also compiled with EABI.
853 Since there are major incompatibilities between the legacy ABI and
854 EABI, especially with regard to structure member alignment, this
855 option also changes the kernel syscall calling convention to
856 disambiguate both ABIs and allow for backward compatibility support
857 (selected with CONFIG_OABI_COMPAT).
859 To use this you need GCC version 4.0.0 or later.
862 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
863 depends on AEABI && EXPERIMENTAL
866 This option preserves the old syscall interface along with the
867 new (ARM EABI) one. It also provides a compatibility layer to
868 intercept syscalls that have structure arguments which layout
869 in memory differs between the legacy ABI and the new ARM EABI
870 (only for non "thumb" binaries). This option adds a tiny
871 overhead to all syscalls and produces a slightly larger kernel.
872 If you know you'll be using only pure EABI user space then you
873 can say N here. If this option is not selected and you attempt
874 to execute a legacy ABI binary then the result will be
875 UNPREDICTABLE (in fact it can be predicted that it won't work
876 at all). If in doubt say Y.
878 config ARCH_FLATMEM_HAS_HOLES
883 # Discontigmem is deprecated
884 config ARCH_DISCONTIGMEM_ENABLE
887 config ARCH_SPARSEMEM_ENABLE
890 config ARCH_SPARSEMEM_DEFAULT
891 def_bool ARCH_SPARSEMEM_ENABLE
893 config ARCH_SELECT_MEMORY_MODEL
894 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
898 default "4" if ARCH_LH7A40X
900 depends on NEED_MULTIPLE_NODES
905 bool "Timer and CPU usage LEDs"
906 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
907 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
908 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
909 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
910 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
911 ARCH_AT91 || ARCH_DAVINCI || \
912 ARCH_KS8695 || MACH_RD88F5182
914 If you say Y here, the LEDs on your machine will be used
915 to provide useful information about your current system status.
917 If you are compiling a kernel for a NetWinder or EBSA-285, you will
918 be able to select which LEDs are active using the options below. If
919 you are compiling a kernel for the EBSA-110 or the LART however, the
920 red LED will simply flash regularly to indicate that the system is
921 still functional. It is safe to say Y here if you have a CATS
922 system, but the driver will do nothing.
925 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
926 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
927 || MACH_OMAP_PERSEUS2
929 depends on !GENERIC_CLOCKEVENTS
930 default y if ARCH_EBSA110
932 If you say Y here, one of the system LEDs (the green one on the
933 NetWinder, the amber one on the EBSA285, or the red one on the LART)
934 will flash regularly to indicate that the system is still
935 operational. This is mainly useful to kernel hackers who are
936 debugging unstable kernels.
938 The LART uses the same LED for both Timer LED and CPU usage LED
939 functions. You may choose to use both, but the Timer LED function
940 will overrule the CPU usage LED.
943 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
945 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
946 || MACH_OMAP_PERSEUS2
949 If you say Y here, the red LED will be used to give a good real
950 time indication of CPU usage, by lighting whenever the idle task
951 is not currently executing.
953 The LART uses the same LED for both Timer LED and CPU usage LED
954 functions. You may choose to use both, but the Timer LED function
955 will overrule the CPU usage LED.
957 config ALIGNMENT_TRAP
959 depends on CPU_CP15_MMU
960 default y if !ARCH_EBSA110
962 ARM processors cannot fetch/store information which is not
963 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
964 address divisible by 4. On 32-bit ARM processors, these non-aligned
965 fetch/store instructions will be emulated in software if you say
966 here, which has a severe performance impact. This is necessary for
967 correct operation of some network protocols. With an IP-only
968 configuration it is safe to say N, otherwise say Y.
974 # Compressed boot loader in ROM. Yes, we really want to ask about
975 # TEXT and BSS so we preserve their values in the config files.
976 config ZBOOT_ROM_TEXT
977 hex "Compressed ROM boot loader base address"
980 The physical address at which the ROM-able zImage is to be
981 placed in the target. Platforms which normally make use of
982 ROM-able zImage formats normally set this to a suitable
983 value in their defconfig file.
985 If ZBOOT_ROM is not enabled, this has no effect.
988 hex "Compressed ROM boot loader BSS address"
991 The base address of an area of read/write memory in the target
992 for the ROM-able zImage which must be available while the
993 decompressor is running. It must be large enough to hold the
994 entire decompressed kernel plus an additional 128 KiB.
995 Platforms which normally make use of ROM-able zImage formats
996 normally set this to a suitable value in their defconfig file.
998 If ZBOOT_ROM is not enabled, this has no effect.
1001 bool "Compressed boot loader in ROM/flash"
1002 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1004 Say Y here if you intend to execute your compressed kernel image
1005 (zImage) directly from ROM or flash. If unsure, say N.
1008 string "Default kernel command string"
1011 On some architectures (EBSA110 and CATS), there is currently no way
1012 for the boot loader to pass arguments to the kernel. For these
1013 architectures, you should supply some command-line options at build
1014 time by entering them here. As a minimum, you should specify the
1015 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1018 bool "Kernel Execute-In-Place from ROM"
1019 depends on !ZBOOT_ROM
1021 Execute-In-Place allows the kernel to run from non-volatile storage
1022 directly addressable by the CPU, such as NOR flash. This saves RAM
1023 space since the text section of the kernel is not loaded from flash
1024 to RAM. Read-write sections, such as the data section and stack,
1025 are still copied to RAM. The XIP kernel is not compressed since
1026 it has to run directly from flash, so it will take more space to
1027 store it. The flash address used to link the kernel object files,
1028 and for storing it, is configuration dependent. Therefore, if you
1029 say Y here, you must know the proper physical address where to
1030 store the kernel image depending on your own flash memory usage.
1032 Also note that the make target becomes "make xipImage" rather than
1033 "make zImage" or "make Image". The final kernel binary to put in
1034 ROM memory will be arch/arm/boot/xipImage.
1038 config XIP_PHYS_ADDR
1039 hex "XIP Kernel Physical Location"
1040 depends on XIP_KERNEL
1041 default "0x00080000"
1043 This is the physical address in your flash memory the kernel will
1044 be linked for and stored to. This address is dependent on your
1048 bool "Kexec system call (EXPERIMENTAL)"
1049 depends on EXPERIMENTAL
1051 kexec is a system call that implements the ability to shutdown your
1052 current kernel, and to start another kernel. It is like a reboot
1053 but it is independent of the system firmware. And like a reboot
1054 you can start any kernel with it, not just Linux.
1056 It is an ongoing process to be certain the hardware in a machine
1057 is properly shutdown, so do not be surprised if this code does not
1058 initially work for you. It may help to enable device hotplugging
1062 bool "Export atags in procfs"
1066 Should the atags used to boot the kernel be exported in an "atags"
1067 file in procfs. Useful with kexec.
1071 menu "CPU Power Management"
1073 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1075 source "drivers/cpufreq/Kconfig"
1077 config CPU_FREQ_SA1100
1079 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1082 config CPU_FREQ_SA1110
1084 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1087 config CPU_FREQ_INTEGRATOR
1088 tristate "CPUfreq driver for ARM Integrator CPUs"
1089 depends on ARCH_INTEGRATOR && CPU_FREQ
1092 This enables the CPUfreq driver for ARM Integrator CPUs.
1094 For details, take a look at <file:Documentation/cpu-freq>.
1099 tristate "CPUfreq driver for i.MX CPUs"
1100 depends on ARCH_IMX && CPU_FREQ
1103 This enables the CPUfreq driver for i.MX CPUs.
1109 depends on CPU_FREQ && ARCH_PXA && PXA25x
1111 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1115 source "drivers/cpuidle/Kconfig"
1119 menu "Floating point emulation"
1121 comment "At least one emulation must be selected"
1124 bool "NWFPE math emulation"
1125 depends on !AEABI || OABI_COMPAT
1127 Say Y to include the NWFPE floating point emulator in the kernel.
1128 This is necessary to run most binaries. Linux does not currently
1129 support floating point hardware so you need to say Y here even if
1130 your machine has an FPA or floating point co-processor podule.
1132 You may say N here if you are going to load the Acorn FPEmulator
1133 early in the bootup.
1136 bool "Support extended precision"
1137 depends on FPE_NWFPE
1139 Say Y to include 80-bit support in the kernel floating-point
1140 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1141 Note that gcc does not generate 80-bit operations by default,
1142 so in most cases this option only enlarges the size of the
1143 floating point emulator without any good reason.
1145 You almost surely want to say N here.
1148 bool "FastFPE math emulation (EXPERIMENTAL)"
1149 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1151 Say Y here to include the FAST floating point emulator in the kernel.
1152 This is an experimental much faster emulator which now also has full
1153 precision for the mantissa. It does not support any exceptions.
1154 It is very simple, and approximately 3-6 times faster than NWFPE.
1156 It should be sufficient for most programs. It may be not suitable
1157 for scientific calculations, but you have to check this for yourself.
1158 If you do not feel you need a faster FP emulation you should better
1162 bool "VFP-format floating point maths"
1163 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1165 Say Y to include VFP support code in the kernel. This is needed
1166 if your hardware includes a VFP unit.
1168 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1169 release notes and additional status information.
1171 Say N if your target does not have VFP hardware.
1179 bool "Advanced SIMD (NEON) Extension support"
1180 depends on VFPv3 && CPU_V7
1182 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1187 menu "Userspace binary formats"
1189 source "fs/Kconfig.binfmt"
1192 tristate "RISC OS personality"
1195 Say Y here to include the kernel code necessary if you want to run
1196 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1197 experimental; if this sounds frightening, say N and sleep in peace.
1198 You can also say M here to compile this support as a module (which
1199 will be called arthur).
1203 menu "Power management options"
1205 source "kernel/power/Kconfig"
1207 config ARCH_SUSPEND_POSSIBLE
1212 source "net/Kconfig"
1214 menu "Device Drivers"
1216 source "drivers/base/Kconfig"
1218 source "drivers/connector/Kconfig"
1220 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1221 source "drivers/mtd/Kconfig"
1224 source "drivers/parport/Kconfig"
1226 source "drivers/pnp/Kconfig"
1228 source "drivers/block/Kconfig"
1230 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1232 source "drivers/misc/Kconfig"
1234 source "drivers/ide/Kconfig"
1236 source "drivers/scsi/Kconfig"
1238 source "drivers/ata/Kconfig"
1240 source "drivers/md/Kconfig"
1242 source "drivers/message/fusion/Kconfig"
1244 source "drivers/ieee1394/Kconfig"
1246 source "drivers/message/i2o/Kconfig"
1248 source "drivers/net/Kconfig"
1250 source "drivers/isdn/Kconfig"
1252 # input before char - char/joystick depends on it. As does USB.
1254 source "drivers/input/Kconfig"
1256 source "drivers/char/Kconfig"
1258 source "drivers/i2c/Kconfig"
1260 source "drivers/spi/Kconfig"
1262 source "drivers/gpio/Kconfig"
1264 source "drivers/w1/Kconfig"
1266 source "drivers/power/Kconfig"
1268 source "drivers/hwmon/Kconfig"
1270 source "drivers/thermal/Kconfig"
1272 source "drivers/watchdog/Kconfig"
1274 source "drivers/ssb/Kconfig"
1276 #source "drivers/l3/Kconfig"
1278 source "drivers/mfd/Kconfig"
1280 source "drivers/media/Kconfig"
1282 source "drivers/video/Kconfig"
1284 source "sound/Kconfig"
1286 source "drivers/hid/Kconfig"
1288 source "drivers/usb/Kconfig"
1290 source "drivers/uwb/Kconfig"
1292 source "drivers/mmc/Kconfig"
1294 source "drivers/memstick/Kconfig"
1296 source "drivers/accessibility/Kconfig"
1298 source "drivers/leds/Kconfig"
1300 source "drivers/rtc/Kconfig"
1302 source "drivers/dma/Kconfig"
1304 source "drivers/dca/Kconfig"
1306 source "drivers/auxdisplay/Kconfig"
1308 source "drivers/regulator/Kconfig"
1310 source "drivers/uio/Kconfig"
1316 source "arch/arm/Kconfig.debug"
1318 source "security/Kconfig"
1320 source "crypto/Kconfig"
1322 source "lib/Kconfig"