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
15 select HAVE_KPROBES if (!XIP_KERNEL)
16 select HAVE_KRETPROBES if (HAVE_KPROBES)
17 select HAVE_FTRACE if (!XIP_KERNEL)
18 select HAVE_DYNAMIC_FTRACE if (HAVE_FTRACE)
20 The ARM series is a line of low-power-consumption RISC chip designs
21 licensed by ARM Ltd and targeted at embedded applications and
22 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
23 manufactured, but legacy ARM-based PC hardware remains popular in
24 Europe. There is an ARM Linux project with a web page at
25 <http://www.arm.linux.org.uk/>.
30 config SYS_SUPPORTS_APM_EMULATION
41 config GENERIC_CLOCKEVENTS
45 config GENERIC_CLOCKEVENTS_BROADCAST
47 depends on GENERIC_CLOCKEVENTS
48 default y if SMP && !LOCAL_TIMERS
61 The Extended Industry Standard Architecture (EISA) bus was
62 developed as an open alternative to the IBM MicroChannel bus.
64 The EISA bus provided some of the features of the IBM MicroChannel
65 bus while maintaining backward compatibility with cards made for
66 the older ISA bus. The EISA bus saw limited use between 1988 and
67 1995 when it was made obsolete by the PCI bus.
69 Say Y here if you are building a kernel for an EISA-based machine.
79 MicroChannel Architecture is found in some IBM PS/2 machines and
80 laptops. It is a bus system similar to PCI or ISA. See
81 <file:Documentation/mca.txt> (and especially the web page given
82 there) before attempting to build an MCA bus kernel.
84 config GENERIC_HARDIRQS
88 config STACKTRACE_SUPPORT
92 config HAVE_LATENCYTOP_SUPPORT
97 config LOCKDEP_SUPPORT
101 config TRACE_IRQFLAGS_SUPPORT
105 config HARDIRQS_SW_RESEND
109 config GENERIC_IRQ_PROBE
113 config GENERIC_LOCKBREAK
116 depends on SMP && PREEMPT
118 config RWSEM_GENERIC_SPINLOCK
122 config RWSEM_XCHGADD_ALGORITHM
125 config ARCH_HAS_ILOG2_U32
129 config ARCH_HAS_ILOG2_U64
133 config GENERIC_HWEIGHT
137 config GENERIC_CALIBRATE_DELAY
141 config ARCH_SUPPORTS_AOUT
144 config ARCH_MAY_HAVE_PC_FDC
151 config GENERIC_ISA_DMA
160 config GENERIC_HARDIRQS_NO__DO_IRQ
166 config OPROFILE_ARMV6
168 depends on CPU_V6 && !SMP
169 select OPROFILE_ARM11_CORE
171 config OPROFILE_MPCORE
173 depends on CPU_V6 && SMP
174 select OPROFILE_ARM11_CORE
176 config OPROFILE_ARM11_CORE
183 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
184 default DRAM_BASE if REMAP_VECTORS_TO_RAM
187 The base address of exception vectors.
189 source "init/Kconfig"
194 prompt "ARM system type"
195 default ARCH_VERSATILE
198 bool "Agilent AAEC-2000 based"
201 This enables support for systems based on the Agilent AAEC-2000
203 config ARCH_INTEGRATOR
204 bool "ARM Ltd. Integrator family"
208 Support for ARM's Integrator platform.
211 bool "ARM Ltd. RealView family"
215 select GENERIC_CLOCKEVENTS
217 This enables support for ARM Ltd RealView boards.
219 config ARCH_VERSATILE
220 bool "ARM Ltd. Versatile family"
225 select GENERIC_CLOCKEVENTS
227 This enables support for ARM Ltd Versatile board.
233 This enables support for systems based on the Atmel AT91RM9200,
234 AT91SAM9 and AT91CAP9 processors.
237 bool "Cirrus CL-PS7500FE"
242 Support for the Cirrus Logic PS7500FE system-on-a-chip.
245 bool "Cirrus Logic CLPS711x/EP721x-based"
247 Support for Cirrus Logic 711x/721x based boards.
254 This is an evaluation board for the StrongARM processor available
255 from Digital. It has limited hardware on-board, including an
256 Ethernet interface, two PCMCIA sockets, two serial ports and a
266 This enables support for the Cirrus EP93xx series of CPUs.
268 config ARCH_FOOTBRIDGE
272 Support for systems based on the DC21285 companion chip
273 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
276 bool "Hilscher NetX based"
279 This enables support for systems based on the Hilscher NetX Soc
282 bool "Hynix HMS720x-based"
285 This enables support for systems based on the Hynix HMS720x
291 select GENERIC_CLOCKEVENTS
293 Support for Motorola's i.MX family of processors (MX1, MXL).
300 select ARCH_SUPPORTS_MSI
302 Support for Intel's IOP13XX (XScale) family of processors.
312 Support for Intel's 80219 and IOP32X (XScale) family of
323 Support for Intel's IOP33X (XScale) family of processors.
330 Support for Intel's IXP23xx (XScale) family of processors.
333 bool "IXP2400/2800-based"
337 Support for Intel's IXP2400/2800 (XScale) family of processors.
344 select GENERIC_CLOCKEVENTS
346 Support for Intel's IXP4XX (XScale) family of processors.
352 Say Y here if you intend to run this kernel on a LinkUp Systems
353 L7200 Software Development Board which uses an ARM720T processor.
354 Information on this board can be obtained at:
356 <http://www.linkupsys.com/>
358 If you have any questions or comments about the Linux kernel port
359 to this board, send e-mail to <sjhill@cotw.com>.
362 bool "Marvell Kirkwood"
365 select GENERIC_CLOCKEVENTS
368 Support for the following Marvell Kirkwood series SoCs:
369 88F6180, 88F6192 and 88F6281.
372 bool "Micrel/Kendin KS8695"
375 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
376 System-on-Chip devices.
379 bool "NetSilicon NS9xxx"
382 select GENERIC_CLOCKEVENTS
384 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
387 <http://www.digi.com/products/microprocessors/index.jsp>
390 bool "Marvell Loki (88RC8480)"
392 select GENERIC_CLOCKEVENTS
395 Support for the Marvell Loki (88RC8480) SoC.
398 bool "Marvell MV78xx0"
401 select GENERIC_CLOCKEVENTS
404 Support for the following Marvell MV78xx0 series SoCs:
408 bool "Freescale MXC/iMX-based"
410 select GENERIC_CLOCKEVENTS
415 Support for Freescale MXC/iMX-based family of processors
423 select GENERIC_CLOCKEVENTS
426 Support for the following Marvell Orion 5x series SoCs:
427 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
431 bool "Philips Nexperia PNX4008 Mobile"
433 This enables support for Philips PNX4008 mobile platform.
436 bool "PXA2xx/PXA3xx-based"
442 select GENERIC_CLOCKEVENTS
445 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
452 select ARCH_MAY_HAVE_PC_FDC
453 select HAVE_PATA_PLATFORM
457 On the Acorn Risc-PC, Linux can support the internal IDE disk and
458 CD-ROM interface, serial and parallel port, and the floppy drive.
463 select ARCH_DISCONTIGMEM_ENABLE
464 select ARCH_SPARSEMEM_ENABLE
465 select ARCH_SELECT_MEMORY_MODEL
469 select GENERIC_CLOCKEVENTS
473 Support for StrongARM 11x0 based boards.
476 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
479 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
480 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
481 the Samsung SMDK2410 development board (and derivatives).
489 Support for the StrongARM based Digital DNARD machine, also known
490 as "Shark" (<http://www.shark-linux.de/shark.html>).
495 Say Y here for systems based on one of the Sharp LH7A40X
496 System on a Chip processors. These CPUs include an ARM922T
497 core with a wide array of integrated devices for
498 hand-held and low-power applications.
503 select GENERIC_CLOCKEVENTS
506 Support for TI's DaVinci platform.
513 select GENERIC_CLOCKEVENTS
515 Support for TI's OMAP platform (OMAP1 and OMAP2).
518 bool "Qualcomm MSM7X00A"
520 select GENERIC_CLOCKEVENTS
522 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
523 apps processor of the MSM7X00A and depends on a shared memory
524 interface to the ARM9 modem processor which runs the baseband stack
525 and controls some vital subsystems (clock and power control, etc).
526 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
530 source "arch/arm/mach-clps711x/Kconfig"
532 source "arch/arm/mach-ep93xx/Kconfig"
534 source "arch/arm/mach-footbridge/Kconfig"
536 source "arch/arm/mach-integrator/Kconfig"
538 source "arch/arm/mach-iop32x/Kconfig"
540 source "arch/arm/mach-iop33x/Kconfig"
542 source "arch/arm/mach-iop13xx/Kconfig"
544 source "arch/arm/mach-ixp4xx/Kconfig"
546 source "arch/arm/mach-ixp2000/Kconfig"
548 source "arch/arm/mach-ixp23xx/Kconfig"
550 source "arch/arm/mach-loki/Kconfig"
552 source "arch/arm/mach-mv78xx0/Kconfig"
554 source "arch/arm/mach-pxa/Kconfig"
556 source "arch/arm/mach-sa1100/Kconfig"
558 source "arch/arm/plat-omap/Kconfig"
560 source "arch/arm/mach-omap1/Kconfig"
562 source "arch/arm/mach-omap2/Kconfig"
564 source "arch/arm/mach-orion5x/Kconfig"
566 source "arch/arm/mach-kirkwood/Kconfig"
568 source "arch/arm/plat-s3c24xx/Kconfig"
569 source "arch/arm/plat-s3c/Kconfig"
572 source "arch/arm/mach-s3c2400/Kconfig"
573 source "arch/arm/mach-s3c2410/Kconfig"
574 source "arch/arm/mach-s3c2412/Kconfig"
575 source "arch/arm/mach-s3c2440/Kconfig"
576 source "arch/arm/mach-s3c2442/Kconfig"
577 source "arch/arm/mach-s3c2443/Kconfig"
580 source "arch/arm/mach-lh7a40x/Kconfig"
582 source "arch/arm/mach-imx/Kconfig"
584 source "arch/arm/mach-h720x/Kconfig"
586 source "arch/arm/mach-versatile/Kconfig"
588 source "arch/arm/mach-aaec2000/Kconfig"
590 source "arch/arm/mach-realview/Kconfig"
592 source "arch/arm/mach-at91/Kconfig"
594 source "arch/arm/plat-mxc/Kconfig"
596 source "arch/arm/mach-netx/Kconfig"
598 source "arch/arm/mach-ns9xxx/Kconfig"
600 source "arch/arm/mach-davinci/Kconfig"
602 source "arch/arm/mach-ks8695/Kconfig"
604 source "arch/arm/mach-msm/Kconfig"
606 # Definitions to make life easier
616 source arch/arm/mm/Kconfig
619 bool "Enable iWMMXt support"
620 depends on CPU_XSCALE || CPU_XSC3
621 default y if PXA27x || PXA3xx
623 Enable support for iWMMXt context switching at run time if
624 running on a CPU that supports it.
626 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
629 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
633 source "arch/arm/Kconfig-nommu"
638 source "arch/arm/common/Kconfig"
640 config FORCE_MAX_ZONEORDER
653 Find out whether you have ISA slots on your motherboard. ISA is the
654 name of a bus system, i.e. the way the CPU talks to the other stuff
655 inside your box. Other bus systems are PCI, EISA, MicroChannel
656 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
657 newer boards don't support it. If you have ISA, say Y, otherwise N.
659 # Select ISA DMA controller support
664 # Select ISA DMA interface
669 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
671 Find out whether you have a PCI motherboard. PCI is the name of a
672 bus system, i.e. the way the CPU talks to the other stuff inside
673 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
674 VESA. If you have PCI, say Y, otherwise N.
679 # Select the host bridge type
680 config PCI_HOST_VIA82C505
682 depends on PCI && ARCH_SHARK
685 config PCI_HOST_ITE8152
687 depends on PCI && MACH_ARMCORE
691 source "drivers/pci/Kconfig"
693 source "drivers/pcmcia/Kconfig"
697 menu "Kernel Features"
699 source "kernel/time/Kconfig"
702 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
703 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
704 select USE_GENERIC_SMP_HELPERS
706 This enables support for systems with more than one CPU. If you have
707 a system with only one CPU, like most personal computers, say N. If
708 you have a system with more than one CPU, say Y.
710 If you say N here, the kernel will run on single and multiprocessor
711 machines, but will use only one CPU of a multiprocessor machine. If
712 you say Y here, the kernel will run on many, but not all, single
713 processor machines. On a single processor machine, the kernel will
714 run faster if you say N here.
716 See also <file:Documentation/i386/IO-APIC.txt>,
717 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
718 <http://www.linuxdoc.org/docs.html#howto>.
720 If you don't know what to do here, say N.
723 int "Maximum number of CPUs (2-32)"
729 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
730 depends on SMP && HOTPLUG && EXPERIMENTAL
732 Say Y here to experiment with turning CPUs off and on. CPUs
733 can be controlled through /sys/devices/system/cpu.
736 bool "Use local timer interrupts"
737 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
740 Enable support for local timers on SMP platforms, rather then the
741 legacy IPI broadcast method. Local timers allows the system
742 accounting to be spread across the timer interval, preventing a
743 "thundering herd" at every timer tick.
746 bool "Preemptible Kernel (EXPERIMENTAL)"
747 depends on EXPERIMENTAL
749 This option reduces the latency of the kernel when reacting to
750 real-time or interactive events by allowing a low priority process to
751 be preempted even if it is in kernel mode executing a system call.
752 This allows applications to run more reliably even when the system is
755 Say Y here if you are building a kernel for a desktop, embedded
756 or real-time system. Say N if you are unsure.
760 default 128 if ARCH_L7200
761 default 200 if ARCH_EBSA110 || ARCH_S3C2410
762 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
763 default AT91_TIMER_HZ if ARCH_AT91
767 bool "Use the ARM EABI to compile the kernel"
769 This option allows for the kernel to be compiled using the latest
770 ARM ABI (aka EABI). This is only useful if you are using a user
771 space environment that is also compiled with EABI.
773 Since there are major incompatibilities between the legacy ABI and
774 EABI, especially with regard to structure member alignment, this
775 option also changes the kernel syscall calling convention to
776 disambiguate both ABIs and allow for backward compatibility support
777 (selected with CONFIG_OABI_COMPAT).
779 To use this you need GCC version 4.0.0 or later.
782 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
783 depends on AEABI && EXPERIMENTAL
786 This option preserves the old syscall interface along with the
787 new (ARM EABI) one. It also provides a compatibility layer to
788 intercept syscalls that have structure arguments which layout
789 in memory differs between the legacy ABI and the new ARM EABI
790 (only for non "thumb" binaries). This option adds a tiny
791 overhead to all syscalls and produces a slightly larger kernel.
792 If you know you'll be using only pure EABI user space then you
793 can say N here. If this option is not selected and you attempt
794 to execute a legacy ABI binary then the result will be
795 UNPREDICTABLE (in fact it can be predicted that it won't work
796 at all). If in doubt say Y.
798 config ARCH_DISCONTIGMEM_ENABLE
800 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
802 Say Y to support efficient handling of discontiguous physical memory,
803 for architectures which are either NUMA (Non-Uniform Memory Access)
804 or have huge holes in the physical address space for other reasons.
805 See <file:Documentation/vm/numa> for more.
807 config ARCH_SPARSEMEM_ENABLE
810 config ARCH_SELECT_MEMORY_MODEL
815 default "4" if ARCH_LH7A40X
817 depends on NEED_MULTIPLE_NODES
822 bool "Timer and CPU usage LEDs"
823 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
824 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
825 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
826 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
827 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
828 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
829 ARCH_KS8695 || MACH_RD88F5182
831 If you say Y here, the LEDs on your machine will be used
832 to provide useful information about your current system status.
834 If you are compiling a kernel for a NetWinder or EBSA-285, you will
835 be able to select which LEDs are active using the options below. If
836 you are compiling a kernel for the EBSA-110 or the LART however, the
837 red LED will simply flash regularly to indicate that the system is
838 still functional. It is safe to say Y here if you have a CATS
839 system, but the driver will do nothing.
842 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
843 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
844 || MACH_OMAP_PERSEUS2
846 depends on !GENERIC_CLOCKEVENTS
847 default y if ARCH_EBSA110
849 If you say Y here, one of the system LEDs (the green one on the
850 NetWinder, the amber one on the EBSA285, or the red one on the LART)
851 will flash regularly to indicate that the system is still
852 operational. This is mainly useful to kernel hackers who are
853 debugging unstable kernels.
855 The LART uses the same LED for both Timer LED and CPU usage LED
856 functions. You may choose to use both, but the Timer LED function
857 will overrule the CPU usage LED.
860 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
862 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
863 || MACH_OMAP_PERSEUS2
866 If you say Y here, the red LED will be used to give a good real
867 time indication of CPU usage, by lighting whenever the idle task
868 is not currently executing.
870 The LART uses the same LED for both Timer LED and CPU usage LED
871 functions. You may choose to use both, but the Timer LED function
872 will overrule the CPU usage LED.
874 config ALIGNMENT_TRAP
876 depends on CPU_CP15_MMU
877 default y if !ARCH_EBSA110
879 ARM processors cannot fetch/store information which is not
880 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
881 address divisible by 4. On 32-bit ARM processors, these non-aligned
882 fetch/store instructions will be emulated in software if you say
883 here, which has a severe performance impact. This is necessary for
884 correct operation of some network protocols. With an IP-only
885 configuration it is safe to say N, otherwise say Y.
891 # Compressed boot loader in ROM. Yes, we really want to ask about
892 # TEXT and BSS so we preserve their values in the config files.
893 config ZBOOT_ROM_TEXT
894 hex "Compressed ROM boot loader base address"
897 The physical address at which the ROM-able zImage is to be
898 placed in the target. Platforms which normally make use of
899 ROM-able zImage formats normally set this to a suitable
900 value in their defconfig file.
902 If ZBOOT_ROM is not enabled, this has no effect.
905 hex "Compressed ROM boot loader BSS address"
908 The base address of an area of read/write memory in the target
909 for the ROM-able zImage which must be available while the
910 decompressor is running. It must be large enough to hold the
911 entire decompressed kernel plus an additional 128 KiB.
912 Platforms which normally make use of ROM-able zImage formats
913 normally set this to a suitable value in their defconfig file.
915 If ZBOOT_ROM is not enabled, this has no effect.
918 bool "Compressed boot loader in ROM/flash"
919 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
921 Say Y here if you intend to execute your compressed kernel image
922 (zImage) directly from ROM or flash. If unsure, say N.
925 string "Default kernel command string"
928 On some architectures (EBSA110 and CATS), there is currently no way
929 for the boot loader to pass arguments to the kernel. For these
930 architectures, you should supply some command-line options at build
931 time by entering them here. As a minimum, you should specify the
932 memory size and the root device (e.g., mem=64M root=/dev/nfs).
935 bool "Kernel Execute-In-Place from ROM"
936 depends on !ZBOOT_ROM
938 Execute-In-Place allows the kernel to run from non-volatile storage
939 directly addressable by the CPU, such as NOR flash. This saves RAM
940 space since the text section of the kernel is not loaded from flash
941 to RAM. Read-write sections, such as the data section and stack,
942 are still copied to RAM. The XIP kernel is not compressed since
943 it has to run directly from flash, so it will take more space to
944 store it. The flash address used to link the kernel object files,
945 and for storing it, is configuration dependent. Therefore, if you
946 say Y here, you must know the proper physical address where to
947 store the kernel image depending on your own flash memory usage.
949 Also note that the make target becomes "make xipImage" rather than
950 "make zImage" or "make Image". The final kernel binary to put in
951 ROM memory will be arch/arm/boot/xipImage.
956 hex "XIP Kernel Physical Location"
957 depends on XIP_KERNEL
960 This is the physical address in your flash memory the kernel will
961 be linked for and stored to. This address is dependent on your
965 bool "Kexec system call (EXPERIMENTAL)"
966 depends on EXPERIMENTAL
968 kexec is a system call that implements the ability to shutdown your
969 current kernel, and to start another kernel. It is like a reboot
970 but it is independent of the system firmware. And like a reboot
971 you can start any kernel with it, not just Linux.
973 It is an ongoing process to be certain the hardware in a machine
974 is properly shutdown, so do not be surprised if this code does not
975 initially work for you. It may help to enable device hotplugging
979 bool "Export atags in procfs"
983 Should the atags used to boot the kernel be exported in an "atags"
984 file in procfs. Useful with kexec.
988 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
990 menu "CPU Frequency scaling"
992 source "drivers/cpufreq/Kconfig"
994 config CPU_FREQ_SA1100
996 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
999 config CPU_FREQ_SA1110
1001 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1004 config CPU_FREQ_INTEGRATOR
1005 tristate "CPUfreq driver for ARM Integrator CPUs"
1006 depends on ARCH_INTEGRATOR && CPU_FREQ
1009 This enables the CPUfreq driver for ARM Integrator CPUs.
1011 For details, take a look at <file:Documentation/cpu-freq>.
1016 tristate "CPUfreq driver for i.MX CPUs"
1017 depends on ARCH_IMX && CPU_FREQ
1020 This enables the CPUfreq driver for i.MX CPUs.
1026 depends on CPU_FREQ && ARCH_PXA && PXA25x
1028 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1034 menu "Floating point emulation"
1036 comment "At least one emulation must be selected"
1039 bool "NWFPE math emulation"
1040 depends on !AEABI || OABI_COMPAT
1042 Say Y to include the NWFPE floating point emulator in the kernel.
1043 This is necessary to run most binaries. Linux does not currently
1044 support floating point hardware so you need to say Y here even if
1045 your machine has an FPA or floating point co-processor podule.
1047 You may say N here if you are going to load the Acorn FPEmulator
1048 early in the bootup.
1051 bool "Support extended precision"
1052 depends on FPE_NWFPE
1054 Say Y to include 80-bit support in the kernel floating-point
1055 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1056 Note that gcc does not generate 80-bit operations by default,
1057 so in most cases this option only enlarges the size of the
1058 floating point emulator without any good reason.
1060 You almost surely want to say N here.
1063 bool "FastFPE math emulation (EXPERIMENTAL)"
1064 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1066 Say Y here to include the FAST floating point emulator in the kernel.
1067 This is an experimental much faster emulator which now also has full
1068 precision for the mantissa. It does not support any exceptions.
1069 It is very simple, and approximately 3-6 times faster than NWFPE.
1071 It should be sufficient for most programs. It may be not suitable
1072 for scientific calculations, but you have to check this for yourself.
1073 If you do not feel you need a faster FP emulation you should better
1077 bool "VFP-format floating point maths"
1078 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1080 Say Y to include VFP support code in the kernel. This is needed
1081 if your hardware includes a VFP unit.
1083 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1084 release notes and additional status information.
1086 Say N if your target does not have VFP hardware.
1094 bool "Advanced SIMD (NEON) Extension support"
1095 depends on VFPv3 && CPU_V7
1097 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1102 menu "Userspace binary formats"
1104 source "fs/Kconfig.binfmt"
1107 tristate "RISC OS personality"
1110 Say Y here to include the kernel code necessary if you want to run
1111 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1112 experimental; if this sounds frightening, say N and sleep in peace.
1113 You can also say M here to compile this support as a module (which
1114 will be called arthur).
1118 menu "Power management options"
1120 source "kernel/power/Kconfig"
1122 config ARCH_SUSPEND_POSSIBLE
1127 source "net/Kconfig"
1129 menu "Device Drivers"
1131 source "drivers/base/Kconfig"
1133 source "drivers/connector/Kconfig"
1135 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1136 source "drivers/mtd/Kconfig"
1139 source "drivers/parport/Kconfig"
1141 source "drivers/pnp/Kconfig"
1143 source "drivers/block/Kconfig"
1145 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1147 source "drivers/misc/Kconfig"
1149 source "drivers/ide/Kconfig"
1151 source "drivers/scsi/Kconfig"
1153 source "drivers/ata/Kconfig"
1155 source "drivers/md/Kconfig"
1157 source "drivers/message/fusion/Kconfig"
1159 source "drivers/ieee1394/Kconfig"
1161 source "drivers/message/i2o/Kconfig"
1163 source "drivers/net/Kconfig"
1165 source "drivers/isdn/Kconfig"
1167 # input before char - char/joystick depends on it. As does USB.
1169 source "drivers/input/Kconfig"
1171 source "drivers/char/Kconfig"
1173 source "drivers/i2c/Kconfig"
1175 source "drivers/spi/Kconfig"
1177 source "drivers/gpio/Kconfig"
1179 source "drivers/w1/Kconfig"
1181 source "drivers/power/Kconfig"
1183 source "drivers/hwmon/Kconfig"
1185 source "drivers/watchdog/Kconfig"
1187 source "drivers/ssb/Kconfig"
1189 #source "drivers/l3/Kconfig"
1191 source "drivers/mfd/Kconfig"
1193 source "drivers/media/Kconfig"
1195 source "drivers/video/Kconfig"
1197 source "sound/Kconfig"
1199 source "drivers/hid/Kconfig"
1201 source "drivers/usb/Kconfig"
1203 source "drivers/mmc/Kconfig"
1205 source "drivers/leds/Kconfig"
1207 source "drivers/rtc/Kconfig"
1209 source "drivers/dma/Kconfig"
1211 source "drivers/dca/Kconfig"
1213 source "drivers/uio/Kconfig"
1219 source "arch/arm/Kconfig.debug"
1221 source "security/Kconfig"
1223 source "crypto/Kconfig"
1225 source "lib/Kconfig"