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
185 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
186 default DRAM_BASE if REMAP_VECTORS_TO_RAM
189 The base address of exception vectors.
191 source "init/Kconfig"
196 prompt "ARM system type"
197 default ARCH_VERSATILE
200 bool "Agilent AAEC-2000 based"
204 This enables support for systems based on the Agilent AAEC-2000
206 config ARCH_INTEGRATOR
207 bool "ARM Ltd. Integrator family"
212 Support for ARM's Integrator platform.
215 bool "ARM Ltd. RealView family"
220 select GENERIC_CLOCKEVENTS
222 This enables support for ARM Ltd RealView boards.
224 config ARCH_VERSATILE
225 bool "ARM Ltd. Versatile family"
231 select GENERIC_CLOCKEVENTS
233 This enables support for ARM Ltd Versatile board.
240 This enables support for systems based on the Atmel AT91RM9200,
241 AT91SAM9 and AT91CAP9 processors.
244 bool "Cirrus CL-PS7500FE"
249 Support for the Cirrus Logic PS7500FE system-on-a-chip.
252 bool "Cirrus Logic CLPS711x/EP721x-based"
254 Support for Cirrus Logic 711x/721x based boards.
261 This is an evaluation board for the StrongARM processor available
262 from Digital. It has limited hardware on-board, including an
263 Ethernet interface, two PCMCIA sockets, two serial ports and a
272 select ARCH_REQUIRE_GPIOLIB
274 This enables support for the Cirrus EP93xx series of CPUs.
276 config ARCH_FOOTBRIDGE
280 Support for systems based on the DC21285 companion chip
281 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
284 bool "Hilscher NetX based"
287 This enables support for systems based on the Hilscher NetX Soc
290 bool "Hynix HMS720x-based"
293 This enables support for systems based on the Hynix HMS720x
299 select GENERIC_CLOCKEVENTS
301 Support for Motorola's i.MX family of processors (MX1, MXL).
308 select ARCH_SUPPORTS_MSI
310 Support for Intel's IOP13XX (XScale) family of processors.
318 select ARCH_REQUIRE_GPIOLIB
320 Support for Intel's 80219 and IOP32X (XScale) family of
329 select ARCH_REQUIRE_GPIOLIB
331 Support for Intel's IOP33X (XScale) family of processors.
338 Support for Intel's IXP23xx (XScale) family of processors.
341 bool "IXP2400/2800-based"
345 Support for Intel's IXP2400/2800 (XScale) family of processors.
352 select GENERIC_CLOCKEVENTS
354 Support for Intel's IXP4XX (XScale) family of processors.
360 Say Y here if you intend to run this kernel on a LinkUp Systems
361 L7200 Software Development Board which uses an ARM720T processor.
362 Information on this board can be obtained at:
364 <http://www.linkupsys.com/>
366 If you have any questions or comments about the Linux kernel port
367 to this board, send e-mail to <sjhill@cotw.com>.
370 bool "Marvell Kirkwood"
373 select GENERIC_CLOCKEVENTS
376 Support for the following Marvell Kirkwood series SoCs:
377 88F6180, 88F6192 and 88F6281.
380 bool "Micrel/Kendin KS8695"
383 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
384 System-on-Chip devices.
387 bool "NetSilicon NS9xxx"
390 select GENERIC_CLOCKEVENTS
393 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
396 <http://www.digi.com/products/microprocessors/index.jsp>
399 bool "Marvell Loki (88RC8480)"
401 select GENERIC_CLOCKEVENTS
404 Support for the Marvell Loki (88RC8480) SoC.
407 bool "Marvell MV78xx0"
410 select GENERIC_CLOCKEVENTS
413 Support for the following Marvell MV78xx0 series SoCs:
417 bool "Freescale MXC/iMX-based"
419 select GENERIC_CLOCKEVENTS
422 select ARCH_REQUIRE_GPIOLIB
424 Support for Freescale MXC/iMX-based family of processors
432 select GENERIC_CLOCKEVENTS
435 Support for the following Marvell Orion 5x series SoCs:
436 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
440 bool "Philips Nexperia PNX4008 Mobile"
443 This enables support for Philips PNX4008 mobile platform.
446 bool "PXA2xx/PXA3xx-based"
451 select ARCH_REQUIRE_GPIOLIB
453 select GENERIC_CLOCKEVENTS
456 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
463 select ARCH_MAY_HAVE_PC_FDC
464 select HAVE_PATA_PLATFORM
468 On the Acorn Risc-PC, Linux can support the internal IDE disk and
469 CD-ROM interface, serial and parallel port, and the floppy drive.
474 select ARCH_DISCONTIGMEM_ENABLE
475 select ARCH_SPARSEMEM_ENABLE
476 select ARCH_SELECT_MEMORY_MODEL
480 select GENERIC_CLOCKEVENTS
483 select ARCH_REQUIRE_GPIOLIB
485 Support for StrongARM 11x0 based boards.
488 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
492 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
493 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
494 the Samsung SMDK2410 development board (and derivatives).
502 Support for the StrongARM based Digital DNARD machine, also known
503 as "Shark" (<http://www.shark-linux.de/shark.html>).
508 Say Y here for systems based on one of the Sharp LH7A40X
509 System on a Chip processors. These CPUs include an ARM922T
510 core with a wide array of integrated devices for
511 hand-held and low-power applications.
516 select GENERIC_CLOCKEVENTS
518 select ARCH_REQUIRE_GPIOLIB
521 Support for TI's DaVinci platform.
527 select ARCH_REQUIRE_GPIOLIB
529 select GENERIC_CLOCKEVENTS
531 Support for TI's OMAP platform (OMAP1 and OMAP2).
534 bool "Qualcomm MSM7X00A"
536 select GENERIC_CLOCKEVENTS
538 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
539 apps processor of the MSM7X00A and depends on a shared memory
540 interface to the ARM9 modem processor which runs the baseband stack
541 and controls some vital subsystems (clock and power control, etc).
542 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
546 source "arch/arm/mach-clps711x/Kconfig"
548 source "arch/arm/mach-ep93xx/Kconfig"
550 source "arch/arm/mach-footbridge/Kconfig"
552 source "arch/arm/mach-integrator/Kconfig"
554 source "arch/arm/mach-iop32x/Kconfig"
556 source "arch/arm/mach-iop33x/Kconfig"
558 source "arch/arm/mach-iop13xx/Kconfig"
560 source "arch/arm/mach-ixp4xx/Kconfig"
562 source "arch/arm/mach-ixp2000/Kconfig"
564 source "arch/arm/mach-ixp23xx/Kconfig"
566 source "arch/arm/mach-loki/Kconfig"
568 source "arch/arm/mach-mv78xx0/Kconfig"
570 source "arch/arm/mach-pxa/Kconfig"
572 source "arch/arm/mach-sa1100/Kconfig"
574 source "arch/arm/plat-omap/Kconfig"
576 source "arch/arm/mach-omap1/Kconfig"
578 source "arch/arm/mach-omap2/Kconfig"
580 source "arch/arm/mach-orion5x/Kconfig"
582 source "arch/arm/mach-kirkwood/Kconfig"
584 source "arch/arm/plat-s3c24xx/Kconfig"
585 source "arch/arm/plat-s3c/Kconfig"
588 source "arch/arm/mach-s3c2400/Kconfig"
589 source "arch/arm/mach-s3c2410/Kconfig"
590 source "arch/arm/mach-s3c2412/Kconfig"
591 source "arch/arm/mach-s3c2440/Kconfig"
592 source "arch/arm/mach-s3c2442/Kconfig"
593 source "arch/arm/mach-s3c2443/Kconfig"
596 source "arch/arm/mach-lh7a40x/Kconfig"
598 source "arch/arm/mach-imx/Kconfig"
600 source "arch/arm/mach-h720x/Kconfig"
602 source "arch/arm/mach-versatile/Kconfig"
604 source "arch/arm/mach-aaec2000/Kconfig"
606 source "arch/arm/mach-realview/Kconfig"
608 source "arch/arm/mach-at91/Kconfig"
610 source "arch/arm/plat-mxc/Kconfig"
612 source "arch/arm/mach-netx/Kconfig"
614 source "arch/arm/mach-ns9xxx/Kconfig"
616 source "arch/arm/mach-davinci/Kconfig"
618 source "arch/arm/mach-ks8695/Kconfig"
620 source "arch/arm/mach-msm/Kconfig"
622 # Definitions to make life easier
632 source arch/arm/mm/Kconfig
635 bool "Enable iWMMXt support"
636 depends on CPU_XSCALE || CPU_XSC3
637 default y if PXA27x || PXA3xx
639 Enable support for iWMMXt context switching at run time if
640 running on a CPU that supports it.
642 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
645 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
649 source "arch/arm/Kconfig-nommu"
654 source "arch/arm/common/Kconfig"
656 config FORCE_MAX_ZONEORDER
669 Find out whether you have ISA slots on your motherboard. ISA is the
670 name of a bus system, i.e. the way the CPU talks to the other stuff
671 inside your box. Other bus systems are PCI, EISA, MicroChannel
672 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
673 newer boards don't support it. If you have ISA, say Y, otherwise N.
675 # Select ISA DMA controller support
680 # Select ISA DMA interface
685 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
687 Find out whether you have a PCI motherboard. PCI is the name of a
688 bus system, i.e. the way the CPU talks to the other stuff inside
689 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
690 VESA. If you have PCI, say Y, otherwise N.
695 # Select the host bridge type
696 config PCI_HOST_VIA82C505
698 depends on PCI && ARCH_SHARK
701 config PCI_HOST_ITE8152
703 depends on PCI && MACH_ARMCORE
707 source "drivers/pci/Kconfig"
709 source "drivers/pcmcia/Kconfig"
713 menu "Kernel Features"
715 source "kernel/time/Kconfig"
718 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
719 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
720 select USE_GENERIC_SMP_HELPERS
722 This enables support for systems with more than one CPU. If you have
723 a system with only one CPU, like most personal computers, say N. If
724 you have a system with more than one CPU, say Y.
726 If you say N here, the kernel will run on single and multiprocessor
727 machines, but will use only one CPU of a multiprocessor machine. If
728 you say Y here, the kernel will run on many, but not all, single
729 processor machines. On a single processor machine, the kernel will
730 run faster if you say N here.
732 See also <file:Documentation/i386/IO-APIC.txt>,
733 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
734 <http://www.linuxdoc.org/docs.html#howto>.
736 If you don't know what to do here, say N.
739 int "Maximum number of CPUs (2-32)"
745 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
746 depends on SMP && HOTPLUG && EXPERIMENTAL
748 Say Y here to experiment with turning CPUs off and on. CPUs
749 can be controlled through /sys/devices/system/cpu.
752 bool "Use local timer interrupts"
753 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
756 Enable support for local timers on SMP platforms, rather then the
757 legacy IPI broadcast method. Local timers allows the system
758 accounting to be spread across the timer interval, preventing a
759 "thundering herd" at every timer tick.
762 bool "Preemptible Kernel (EXPERIMENTAL)"
763 depends on EXPERIMENTAL
765 This option reduces the latency of the kernel when reacting to
766 real-time or interactive events by allowing a low priority process to
767 be preempted even if it is in kernel mode executing a system call.
768 This allows applications to run more reliably even when the system is
771 Say Y here if you are building a kernel for a desktop, embedded
772 or real-time system. Say N if you are unsure.
776 default 128 if ARCH_L7200
777 default 200 if ARCH_EBSA110 || ARCH_S3C2410
778 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
779 default AT91_TIMER_HZ if ARCH_AT91
783 bool "Use the ARM EABI to compile the kernel"
785 This option allows for the kernel to be compiled using the latest
786 ARM ABI (aka EABI). This is only useful if you are using a user
787 space environment that is also compiled with EABI.
789 Since there are major incompatibilities between the legacy ABI and
790 EABI, especially with regard to structure member alignment, this
791 option also changes the kernel syscall calling convention to
792 disambiguate both ABIs and allow for backward compatibility support
793 (selected with CONFIG_OABI_COMPAT).
795 To use this you need GCC version 4.0.0 or later.
798 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
799 depends on AEABI && EXPERIMENTAL
802 This option preserves the old syscall interface along with the
803 new (ARM EABI) one. It also provides a compatibility layer to
804 intercept syscalls that have structure arguments which layout
805 in memory differs between the legacy ABI and the new ARM EABI
806 (only for non "thumb" binaries). This option adds a tiny
807 overhead to all syscalls and produces a slightly larger kernel.
808 If you know you'll be using only pure EABI user space then you
809 can say N here. If this option is not selected and you attempt
810 to execute a legacy ABI binary then the result will be
811 UNPREDICTABLE (in fact it can be predicted that it won't work
812 at all). If in doubt say Y.
814 config ARCH_FLATMEM_HAS_HOLES
819 config ARCH_DISCONTIGMEM_ENABLE
821 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
823 Say Y to support efficient handling of discontiguous physical memory,
824 for architectures which are either NUMA (Non-Uniform Memory Access)
825 or have huge holes in the physical address space for other reasons.
826 See <file:Documentation/vm/numa> for more.
828 config ARCH_SPARSEMEM_ENABLE
831 config ARCH_SELECT_MEMORY_MODEL
836 default "4" if ARCH_LH7A40X
838 depends on NEED_MULTIPLE_NODES
843 bool "Timer and CPU usage LEDs"
844 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
845 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
846 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
847 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
848 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
849 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
850 ARCH_KS8695 || MACH_RD88F5182
852 If you say Y here, the LEDs on your machine will be used
853 to provide useful information about your current system status.
855 If you are compiling a kernel for a NetWinder or EBSA-285, you will
856 be able to select which LEDs are active using the options below. If
857 you are compiling a kernel for the EBSA-110 or the LART however, the
858 red LED will simply flash regularly to indicate that the system is
859 still functional. It is safe to say Y here if you have a CATS
860 system, but the driver will do nothing.
863 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
864 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
865 || MACH_OMAP_PERSEUS2
867 depends on !GENERIC_CLOCKEVENTS
868 default y if ARCH_EBSA110
870 If you say Y here, one of the system LEDs (the green one on the
871 NetWinder, the amber one on the EBSA285, or the red one on the LART)
872 will flash regularly to indicate that the system is still
873 operational. This is mainly useful to kernel hackers who are
874 debugging unstable kernels.
876 The LART uses the same LED for both Timer LED and CPU usage LED
877 functions. You may choose to use both, but the Timer LED function
878 will overrule the CPU usage LED.
881 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
883 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
884 || MACH_OMAP_PERSEUS2
887 If you say Y here, the red LED will be used to give a good real
888 time indication of CPU usage, by lighting whenever the idle task
889 is not currently executing.
891 The LART uses the same LED for both Timer LED and CPU usage LED
892 functions. You may choose to use both, but the Timer LED function
893 will overrule the CPU usage LED.
895 config ALIGNMENT_TRAP
897 depends on CPU_CP15_MMU
898 default y if !ARCH_EBSA110
900 ARM processors cannot fetch/store information which is not
901 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
902 address divisible by 4. On 32-bit ARM processors, these non-aligned
903 fetch/store instructions will be emulated in software if you say
904 here, which has a severe performance impact. This is necessary for
905 correct operation of some network protocols. With an IP-only
906 configuration it is safe to say N, otherwise say Y.
912 # Compressed boot loader in ROM. Yes, we really want to ask about
913 # TEXT and BSS so we preserve their values in the config files.
914 config ZBOOT_ROM_TEXT
915 hex "Compressed ROM boot loader base address"
918 The physical address at which the ROM-able zImage is to be
919 placed in the target. Platforms which normally make use of
920 ROM-able zImage formats normally set this to a suitable
921 value in their defconfig file.
923 If ZBOOT_ROM is not enabled, this has no effect.
926 hex "Compressed ROM boot loader BSS address"
929 The base address of an area of read/write memory in the target
930 for the ROM-able zImage which must be available while the
931 decompressor is running. It must be large enough to hold the
932 entire decompressed kernel plus an additional 128 KiB.
933 Platforms which normally make use of ROM-able zImage formats
934 normally set this to a suitable value in their defconfig file.
936 If ZBOOT_ROM is not enabled, this has no effect.
939 bool "Compressed boot loader in ROM/flash"
940 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
942 Say Y here if you intend to execute your compressed kernel image
943 (zImage) directly from ROM or flash. If unsure, say N.
946 string "Default kernel command string"
949 On some architectures (EBSA110 and CATS), there is currently no way
950 for the boot loader to pass arguments to the kernel. For these
951 architectures, you should supply some command-line options at build
952 time by entering them here. As a minimum, you should specify the
953 memory size and the root device (e.g., mem=64M root=/dev/nfs).
956 bool "Kernel Execute-In-Place from ROM"
957 depends on !ZBOOT_ROM
959 Execute-In-Place allows the kernel to run from non-volatile storage
960 directly addressable by the CPU, such as NOR flash. This saves RAM
961 space since the text section of the kernel is not loaded from flash
962 to RAM. Read-write sections, such as the data section and stack,
963 are still copied to RAM. The XIP kernel is not compressed since
964 it has to run directly from flash, so it will take more space to
965 store it. The flash address used to link the kernel object files,
966 and for storing it, is configuration dependent. Therefore, if you
967 say Y here, you must know the proper physical address where to
968 store the kernel image depending on your own flash memory usage.
970 Also note that the make target becomes "make xipImage" rather than
971 "make zImage" or "make Image". The final kernel binary to put in
972 ROM memory will be arch/arm/boot/xipImage.
977 hex "XIP Kernel Physical Location"
978 depends on XIP_KERNEL
981 This is the physical address in your flash memory the kernel will
982 be linked for and stored to. This address is dependent on your
986 bool "Kexec system call (EXPERIMENTAL)"
987 depends on EXPERIMENTAL
989 kexec is a system call that implements the ability to shutdown your
990 current kernel, and to start another kernel. It is like a reboot
991 but it is independent of the system firmware. And like a reboot
992 you can start any kernel with it, not just Linux.
994 It is an ongoing process to be certain the hardware in a machine
995 is properly shutdown, so do not be surprised if this code does not
996 initially work for you. It may help to enable device hotplugging
1000 bool "Export atags in procfs"
1004 Should the atags used to boot the kernel be exported in an "atags"
1005 file in procfs. Useful with kexec.
1009 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1011 menu "CPU Frequency scaling"
1013 source "drivers/cpufreq/Kconfig"
1015 config CPU_FREQ_SA1100
1017 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1020 config CPU_FREQ_SA1110
1022 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1025 config CPU_FREQ_INTEGRATOR
1026 tristate "CPUfreq driver for ARM Integrator CPUs"
1027 depends on ARCH_INTEGRATOR && CPU_FREQ
1030 This enables the CPUfreq driver for ARM Integrator CPUs.
1032 For details, take a look at <file:Documentation/cpu-freq>.
1037 tristate "CPUfreq driver for i.MX CPUs"
1038 depends on ARCH_IMX && CPU_FREQ
1041 This enables the CPUfreq driver for i.MX CPUs.
1047 depends on CPU_FREQ && ARCH_PXA && PXA25x
1049 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1055 menu "Floating point emulation"
1057 comment "At least one emulation must be selected"
1060 bool "NWFPE math emulation"
1061 depends on !AEABI || OABI_COMPAT
1063 Say Y to include the NWFPE floating point emulator in the kernel.
1064 This is necessary to run most binaries. Linux does not currently
1065 support floating point hardware so you need to say Y here even if
1066 your machine has an FPA or floating point co-processor podule.
1068 You may say N here if you are going to load the Acorn FPEmulator
1069 early in the bootup.
1072 bool "Support extended precision"
1073 depends on FPE_NWFPE
1075 Say Y to include 80-bit support in the kernel floating-point
1076 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1077 Note that gcc does not generate 80-bit operations by default,
1078 so in most cases this option only enlarges the size of the
1079 floating point emulator without any good reason.
1081 You almost surely want to say N here.
1084 bool "FastFPE math emulation (EXPERIMENTAL)"
1085 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1087 Say Y here to include the FAST floating point emulator in the kernel.
1088 This is an experimental much faster emulator which now also has full
1089 precision for the mantissa. It does not support any exceptions.
1090 It is very simple, and approximately 3-6 times faster than NWFPE.
1092 It should be sufficient for most programs. It may be not suitable
1093 for scientific calculations, but you have to check this for yourself.
1094 If you do not feel you need a faster FP emulation you should better
1098 bool "VFP-format floating point maths"
1099 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1101 Say Y to include VFP support code in the kernel. This is needed
1102 if your hardware includes a VFP unit.
1104 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1105 release notes and additional status information.
1107 Say N if your target does not have VFP hardware.
1115 bool "Advanced SIMD (NEON) Extension support"
1116 depends on VFPv3 && CPU_V7
1118 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1123 menu "Userspace binary formats"
1125 source "fs/Kconfig.binfmt"
1128 tristate "RISC OS personality"
1131 Say Y here to include the kernel code necessary if you want to run
1132 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1133 experimental; if this sounds frightening, say N and sleep in peace.
1134 You can also say M here to compile this support as a module (which
1135 will be called arthur).
1139 menu "Power management options"
1141 source "kernel/power/Kconfig"
1143 config ARCH_SUSPEND_POSSIBLE
1148 source "net/Kconfig"
1150 menu "Device Drivers"
1152 source "drivers/base/Kconfig"
1154 source "drivers/connector/Kconfig"
1156 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1157 source "drivers/mtd/Kconfig"
1160 source "drivers/parport/Kconfig"
1162 source "drivers/pnp/Kconfig"
1164 source "drivers/block/Kconfig"
1166 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1168 source "drivers/misc/Kconfig"
1170 source "drivers/ide/Kconfig"
1172 source "drivers/scsi/Kconfig"
1174 source "drivers/ata/Kconfig"
1176 source "drivers/md/Kconfig"
1178 source "drivers/message/fusion/Kconfig"
1180 source "drivers/ieee1394/Kconfig"
1182 source "drivers/message/i2o/Kconfig"
1184 source "drivers/net/Kconfig"
1186 source "drivers/isdn/Kconfig"
1188 # input before char - char/joystick depends on it. As does USB.
1190 source "drivers/input/Kconfig"
1192 source "drivers/char/Kconfig"
1194 source "drivers/i2c/Kconfig"
1196 source "drivers/spi/Kconfig"
1198 source "drivers/gpio/Kconfig"
1200 source "drivers/w1/Kconfig"
1202 source "drivers/power/Kconfig"
1204 source "drivers/hwmon/Kconfig"
1206 source "drivers/watchdog/Kconfig"
1208 source "drivers/ssb/Kconfig"
1210 #source "drivers/l3/Kconfig"
1212 source "drivers/mfd/Kconfig"
1214 source "drivers/media/Kconfig"
1216 source "drivers/video/Kconfig"
1218 source "sound/Kconfig"
1220 source "drivers/hid/Kconfig"
1222 source "drivers/usb/Kconfig"
1224 source "drivers/mmc/Kconfig"
1226 source "drivers/leds/Kconfig"
1228 source "drivers/rtc/Kconfig"
1230 source "drivers/dma/Kconfig"
1232 source "drivers/dca/Kconfig"
1234 source "drivers/regulator/Kconfig"
1236 source "drivers/uio/Kconfig"
1242 source "arch/arm/Kconfig.debug"
1244 source "security/Kconfig"
1246 source "crypto/Kconfig"
1248 source "lib/Kconfig"