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)
18 The ARM series is a line of low-power-consumption RISC chip designs
19 licensed by ARM Ltd and targeted at embedded applications and
20 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
21 manufactured, but legacy ARM-based PC hardware remains popular in
22 Europe. There is an ARM Linux project with a web page at
23 <http://www.arm.linux.org.uk/>.
25 config SYS_SUPPORTS_APM_EMULATION
36 config GENERIC_CLOCKEVENTS
40 config GENERIC_CLOCKEVENTS_BROADCAST
42 depends on GENERIC_CLOCKEVENTS
43 default y if SMP && !LOCAL_TIMERS
56 The Extended Industry Standard Architecture (EISA) bus was
57 developed as an open alternative to the IBM MicroChannel bus.
59 The EISA bus provided some of the features of the IBM MicroChannel
60 bus while maintaining backward compatibility with cards made for
61 the older ISA bus. The EISA bus saw limited use between 1988 and
62 1995 when it was made obsolete by the PCI bus.
64 Say Y here if you are building a kernel for an EISA-based machine.
74 MicroChannel Architecture is found in some IBM PS/2 machines and
75 laptops. It is a bus system similar to PCI or ISA. See
76 <file:Documentation/mca.txt> (and especially the web page given
77 there) before attempting to build an MCA bus kernel.
79 config GENERIC_HARDIRQS
83 config STACKTRACE_SUPPORT
87 config LOCKDEP_SUPPORT
91 config TRACE_IRQFLAGS_SUPPORT
95 config HARDIRQS_SW_RESEND
99 config GENERIC_IRQ_PROBE
103 config GENERIC_LOCKBREAK
106 depends on SMP && PREEMPT
108 config RWSEM_GENERIC_SPINLOCK
112 config RWSEM_XCHGADD_ALGORITHM
115 config ARCH_HAS_ILOG2_U32
119 config ARCH_HAS_ILOG2_U64
123 config GENERIC_HWEIGHT
127 config GENERIC_CALIBRATE_DELAY
131 config ARCH_SUPPORTS_AOUT
134 config ARCH_MAY_HAVE_PC_FDC
141 config GENERIC_ISA_DMA
152 config OPROFILE_ARMV6
154 depends on CPU_V6 && !SMP
155 select OPROFILE_ARM11_CORE
157 config OPROFILE_MPCORE
159 depends on CPU_V6 && SMP
160 select OPROFILE_ARM11_CORE
162 config OPROFILE_ARM11_CORE
169 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
170 default DRAM_BASE if REMAP_VECTORS_TO_RAM
173 The base address of exception vectors.
175 source "init/Kconfig"
180 prompt "ARM system type"
181 default ARCH_VERSATILE
184 bool "Agilent AAEC-2000 based"
187 This enables support for systems based on the Agilent AAEC-2000
189 config ARCH_INTEGRATOR
190 bool "ARM Ltd. Integrator family"
194 Support for ARM's Integrator platform.
197 bool "ARM Ltd. RealView family"
201 select GENERIC_CLOCKEVENTS
203 This enables support for ARM Ltd RealView boards.
205 config ARCH_VERSATILE
206 bool "ARM Ltd. Versatile family"
211 select GENERIC_CLOCKEVENTS
213 This enables support for ARM Ltd Versatile board.
219 This enables support for systems based on the Atmel AT91RM9200,
220 AT91SAM9 and AT91CAP9 processors.
223 bool "Cirrus CL-PS7500FE"
228 Support for the Cirrus Logic PS7500FE system-on-a-chip.
231 bool "Cirrus Logic CLPS711x/EP721x-based"
233 Support for Cirrus Logic 711x/721x based boards.
238 select FOOTBRIDGE_ADDIN
240 Support for Intel's EBSA285 companion chip.
247 This is an evaluation board for the StrongARM processor available
248 from Digital. It has limited hardware on-board, including an
249 Ethernet interface, two PCMCIA sockets, two serial ports and a
259 This enables support for the Cirrus EP93xx series of CPUs.
261 config ARCH_FOOTBRIDGE
265 Support for systems based on the DC21285 companion chip
266 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
269 bool "Hilscher NetX based"
272 This enables support for systems based on the Hilscher NetX Soc
275 bool "Hynix HMS720x-based"
278 This enables support for systems based on the Hynix HMS720x
284 select GENERIC_CLOCKEVENTS
286 Support for Motorola's i.MX family of processors (MX1, MXL).
293 select ARCH_SUPPORTS_MSI
295 Support for Intel's IOP13XX (XScale) family of processors.
303 Support for Intel's 80219 and IOP32X (XScale) family of
312 Support for Intel's IOP33X (XScale) family of processors.
319 Support for Intel's IXP23xx (XScale) family of processors.
322 bool "IXP2400/2800-based"
326 Support for Intel's IXP2400/2800 (XScale) family of processors.
333 select GENERIC_CLOCKEVENTS
335 Support for Intel's IXP4XX (XScale) family of processors.
341 Say Y here if you intend to run this kernel on a LinkUp Systems
342 L7200 Software Development Board which uses an ARM720T processor.
343 Information on this board can be obtained at:
345 <http://www.linkupsys.com/>
347 If you have any questions or comments about the Linux kernel port
348 to this board, send e-mail to <sjhill@cotw.com>.
351 bool "Micrel/Kendin KS8695"
354 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
355 System-on-Chip devices.
358 bool "NetSilicon NS9xxx"
361 select GENERIC_CLOCKEVENTS
363 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
366 <http://www.digi.com/products/microprocessors/index.jsp>
369 bool "Freescale MXC/iMX-based"
372 Support for Freescale MXC/iMX-based family of processors
380 select GENERIC_CLOCKEVENTS
383 Support for the following Marvell Orion 5x series SoCs:
384 Orion-1 (5181), Orion-NAS (5182), Orion-2 (5281.)
387 bool "Philips Nexperia PNX4008 Mobile"
389 This enables support for Philips PNX4008 mobile platform.
392 bool "PXA2xx/PXA3xx-based"
398 select GENERIC_CLOCKEVENTS
401 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
408 select ARCH_MAY_HAVE_PC_FDC
409 select HAVE_PATA_PLATFORM
413 On the Acorn Risc-PC, Linux can support the internal IDE disk and
414 CD-ROM interface, serial and parallel port, and the floppy drive.
419 select ARCH_DISCONTIGMEM_ENABLE
420 select ARCH_SPARSEMEM_ENABLE
421 select ARCH_SELECT_MEMORY_MODEL
425 select GENERIC_CLOCKEVENTS
429 Support for StrongARM 11x0 based boards.
432 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
435 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
436 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
437 the Samsung SMDK2410 development board (and derivatives).
445 Support for the StrongARM based Digital DNARD machine, also known
446 as "Shark" (<http://www.shark-linux.de/shark.html>).
451 Say Y here for systems based on one of the Sharp LH7A40X
452 System on a Chip processors. These CPUs include an ARM922T
453 core with a wide array of integrated devices for
454 hand-held and low-power applications.
459 select GENERIC_CLOCKEVENTS
462 Support for TI's DaVinci platform.
469 select GENERIC_CLOCKEVENTS
471 Support for TI's OMAP platform (OMAP1 and OMAP2).
474 bool "Qualcomm MSM7X00A"
476 select GENERIC_CLOCKEVENTS
478 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
479 apps processor of the MSM7X00A and depends on a shared memory
480 interface to the ARM9 modem processor which runs the baseband stack
481 and controls some vital subsystems (clock and power control, etc).
482 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
486 source "arch/arm/mach-clps711x/Kconfig"
488 source "arch/arm/mach-ep93xx/Kconfig"
490 source "arch/arm/mach-footbridge/Kconfig"
492 source "arch/arm/mach-integrator/Kconfig"
494 source "arch/arm/mach-iop32x/Kconfig"
496 source "arch/arm/mach-iop33x/Kconfig"
498 source "arch/arm/mach-iop13xx/Kconfig"
500 source "arch/arm/mach-ixp4xx/Kconfig"
502 source "arch/arm/mach-ixp2000/Kconfig"
504 source "arch/arm/mach-ixp23xx/Kconfig"
506 source "arch/arm/mach-pxa/Kconfig"
508 source "arch/arm/mach-sa1100/Kconfig"
510 source "arch/arm/plat-omap/Kconfig"
512 source "arch/arm/mach-omap1/Kconfig"
514 source "arch/arm/mach-omap2/Kconfig"
516 source "arch/arm/mach-orion5x/Kconfig"
518 source "arch/arm/plat-s3c24xx/Kconfig"
519 source "arch/arm/plat-s3c/Kconfig"
522 source "arch/arm/mach-s3c2400/Kconfig"
523 source "arch/arm/mach-s3c2410/Kconfig"
524 source "arch/arm/mach-s3c2412/Kconfig"
525 source "arch/arm/mach-s3c2440/Kconfig"
526 source "arch/arm/mach-s3c2442/Kconfig"
527 source "arch/arm/mach-s3c2443/Kconfig"
530 source "arch/arm/mach-lh7a40x/Kconfig"
532 source "arch/arm/mach-imx/Kconfig"
534 source "arch/arm/mach-h720x/Kconfig"
536 source "arch/arm/mach-versatile/Kconfig"
538 source "arch/arm/mach-aaec2000/Kconfig"
540 source "arch/arm/mach-realview/Kconfig"
542 source "arch/arm/mach-at91/Kconfig"
544 source "arch/arm/plat-mxc/Kconfig"
546 source "arch/arm/mach-netx/Kconfig"
548 source "arch/arm/mach-ns9xxx/Kconfig"
550 source "arch/arm/mach-davinci/Kconfig"
552 source "arch/arm/mach-ks8695/Kconfig"
554 source "arch/arm/mach-msm/Kconfig"
556 # Definitions to make life easier
566 source arch/arm/mm/Kconfig
569 bool "Enable iWMMXt support"
570 depends on CPU_XSCALE || CPU_XSC3
571 default y if PXA27x || PXA3xx
573 Enable support for iWMMXt context switching at run time if
574 running on a CPU that supports it.
576 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
579 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
583 source "arch/arm/Kconfig-nommu"
588 source "arch/arm/common/Kconfig"
590 config FORCE_MAX_ZONEORDER
603 Find out whether you have ISA slots on your motherboard. ISA is the
604 name of a bus system, i.e. the way the CPU talks to the other stuff
605 inside your box. Other bus systems are PCI, EISA, MicroChannel
606 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
607 newer boards don't support it. If you have ISA, say Y, otherwise N.
609 # Select ISA DMA controller support
614 # Select ISA DMA interface
619 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
621 Find out whether you have a PCI motherboard. PCI is the name of a
622 bus system, i.e. the way the CPU talks to the other stuff inside
623 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
624 VESA. If you have PCI, say Y, otherwise N.
629 # Select the host bridge type
630 config PCI_HOST_VIA82C505
632 depends on PCI && ARCH_SHARK
635 config PCI_HOST_ITE8152
637 depends on PCI && MACH_ARMCORE
641 source "drivers/pci/Kconfig"
643 source "drivers/pcmcia/Kconfig"
647 menu "Kernel Features"
649 source "kernel/time/Kconfig"
652 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
653 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
655 This enables support for systems with more than one CPU. If you have
656 a system with only one CPU, like most personal computers, say N. If
657 you have a system with more than one CPU, say Y.
659 If you say N here, the kernel will run on single and multiprocessor
660 machines, but will use only one CPU of a multiprocessor machine. If
661 you say Y here, the kernel will run on many, but not all, single
662 processor machines. On a single processor machine, the kernel will
663 run faster if you say N here.
665 See also <file:Documentation/i386/IO-APIC.txt>,
666 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
667 <http://www.linuxdoc.org/docs.html#howto>.
669 If you don't know what to do here, say N.
672 int "Maximum number of CPUs (2-32)"
678 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
679 depends on SMP && HOTPLUG && EXPERIMENTAL
681 Say Y here to experiment with turning CPUs off and on. CPUs
682 can be controlled through /sys/devices/system/cpu.
685 bool "Use local timer interrupts"
686 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
689 Enable support for local timers on SMP platforms, rather then the
690 legacy IPI broadcast method. Local timers allows the system
691 accounting to be spread across the timer interval, preventing a
692 "thundering herd" at every timer tick.
695 bool "Preemptible Kernel (EXPERIMENTAL)"
696 depends on EXPERIMENTAL
698 This option reduces the latency of the kernel when reacting to
699 real-time or interactive events by allowing a low priority process to
700 be preempted even if it is in kernel mode executing a system call.
701 This allows applications to run more reliably even when the system is
704 Say Y here if you are building a kernel for a desktop, embedded
705 or real-time system. Say N if you are unsure.
708 bool "Dynamic tick timer"
709 depends on !GENERIC_CLOCKEVENTS
711 Select this option if you want to disable continuous timer ticks
712 and have them programmed to occur as required. This option saves
713 power as the system can remain in idle state for longer.
715 By default dynamic tick is disabled during the boot, and can be
716 manually enabled with:
718 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
720 Alternatively, if you want dynamic tick automatically enabled
721 during boot, pass "dyntick=enable" via the kernel command string.
723 Please note that dynamic tick may affect the accuracy of
724 timekeeping on some platforms depending on the implementation.
725 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
726 to have accurate timekeeping with dynamic tick.
730 default 128 if ARCH_L7200
731 default 200 if ARCH_EBSA110 || ARCH_S3C2410
732 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
733 default AT91_TIMER_HZ if ARCH_AT91
737 bool "Use the ARM EABI to compile the kernel"
739 This option allows for the kernel to be compiled using the latest
740 ARM ABI (aka EABI). This is only useful if you are using a user
741 space environment that is also compiled with EABI.
743 Since there are major incompatibilities between the legacy ABI and
744 EABI, especially with regard to structure member alignment, this
745 option also changes the kernel syscall calling convention to
746 disambiguate both ABIs and allow for backward compatibility support
747 (selected with CONFIG_OABI_COMPAT).
749 To use this you need GCC version 4.0.0 or later.
752 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
753 depends on AEABI && EXPERIMENTAL
756 This option preserves the old syscall interface along with the
757 new (ARM EABI) one. It also provides a compatibility layer to
758 intercept syscalls that have structure arguments which layout
759 in memory differs between the legacy ABI and the new ARM EABI
760 (only for non "thumb" binaries). This option adds a tiny
761 overhead to all syscalls and produces a slightly larger kernel.
762 If you know you'll be using only pure EABI user space then you
763 can say N here. If this option is not selected and you attempt
764 to execute a legacy ABI binary then the result will be
765 UNPREDICTABLE (in fact it can be predicted that it won't work
766 at all). If in doubt say Y.
768 config ARCH_DISCONTIGMEM_ENABLE
770 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
772 Say Y to support efficient handling of discontiguous physical memory,
773 for architectures which are either NUMA (Non-Uniform Memory Access)
774 or have huge holes in the physical address space for other reasons.
775 See <file:Documentation/vm/numa> for more.
777 config ARCH_SPARSEMEM_ENABLE
780 config ARCH_SELECT_MEMORY_MODEL
785 default "4" if ARCH_LH7A40X
787 depends on NEED_MULTIPLE_NODES
792 bool "Timer and CPU usage LEDs"
793 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
794 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
795 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
796 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
797 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
798 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
799 ARCH_KS8695 || MACH_RD88F5182
801 If you say Y here, the LEDs on your machine will be used
802 to provide useful information about your current system status.
804 If you are compiling a kernel for a NetWinder or EBSA-285, you will
805 be able to select which LEDs are active using the options below. If
806 you are compiling a kernel for the EBSA-110 or the LART however, the
807 red LED will simply flash regularly to indicate that the system is
808 still functional. It is safe to say Y here if you have a CATS
809 system, but the driver will do nothing.
812 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
813 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
814 || MACH_OMAP_PERSEUS2
816 depends on !GENERIC_CLOCKEVENTS
817 default y if ARCH_EBSA110
819 If you say Y here, one of the system LEDs (the green one on the
820 NetWinder, the amber one on the EBSA285, or the red one on the LART)
821 will flash regularly to indicate that the system is still
822 operational. This is mainly useful to kernel hackers who are
823 debugging unstable kernels.
825 The LART uses the same LED for both Timer LED and CPU usage LED
826 functions. You may choose to use both, but the Timer LED function
827 will overrule the CPU usage LED.
830 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
832 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
833 || MACH_OMAP_PERSEUS2
836 If you say Y here, the red LED will be used to give a good real
837 time indication of CPU usage, by lighting whenever the idle task
838 is not currently executing.
840 The LART uses the same LED for both Timer LED and CPU usage LED
841 functions. You may choose to use both, but the Timer LED function
842 will overrule the CPU usage LED.
844 config ALIGNMENT_TRAP
846 depends on CPU_CP15_MMU
847 default y if !ARCH_EBSA110
849 ARM processors cannot fetch/store information which is not
850 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
851 address divisible by 4. On 32-bit ARM processors, these non-aligned
852 fetch/store instructions will be emulated in software if you say
853 here, which has a severe performance impact. This is necessary for
854 correct operation of some network protocols. With an IP-only
855 configuration it is safe to say N, otherwise say Y.
861 # Compressed boot loader in ROM. Yes, we really want to ask about
862 # TEXT and BSS so we preserve their values in the config files.
863 config ZBOOT_ROM_TEXT
864 hex "Compressed ROM boot loader base address"
867 The physical address at which the ROM-able zImage is to be
868 placed in the target. Platforms which normally make use of
869 ROM-able zImage formats normally set this to a suitable
870 value in their defconfig file.
872 If ZBOOT_ROM is not enabled, this has no effect.
875 hex "Compressed ROM boot loader BSS address"
878 The base address of an area of read/write memory in the target
879 for the ROM-able zImage which must be available while the
880 decompressor is running. It must be large enough to hold the
881 entire decompressed kernel plus an additional 128 KiB.
882 Platforms which normally make use of ROM-able zImage formats
883 normally set this to a suitable value in their defconfig file.
885 If ZBOOT_ROM is not enabled, this has no effect.
888 bool "Compressed boot loader in ROM/flash"
889 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
891 Say Y here if you intend to execute your compressed kernel image
892 (zImage) directly from ROM or flash. If unsure, say N.
895 string "Default kernel command string"
898 On some architectures (EBSA110 and CATS), there is currently no way
899 for the boot loader to pass arguments to the kernel. For these
900 architectures, you should supply some command-line options at build
901 time by entering them here. As a minimum, you should specify the
902 memory size and the root device (e.g., mem=64M root=/dev/nfs).
905 bool "Kernel Execute-In-Place from ROM"
906 depends on !ZBOOT_ROM
908 Execute-In-Place allows the kernel to run from non-volatile storage
909 directly addressable by the CPU, such as NOR flash. This saves RAM
910 space since the text section of the kernel is not loaded from flash
911 to RAM. Read-write sections, such as the data section and stack,
912 are still copied to RAM. The XIP kernel is not compressed since
913 it has to run directly from flash, so it will take more space to
914 store it. The flash address used to link the kernel object files,
915 and for storing it, is configuration dependent. Therefore, if you
916 say Y here, you must know the proper physical address where to
917 store the kernel image depending on your own flash memory usage.
919 Also note that the make target becomes "make xipImage" rather than
920 "make zImage" or "make Image". The final kernel binary to put in
921 ROM memory will be arch/arm/boot/xipImage.
926 hex "XIP Kernel Physical Location"
927 depends on XIP_KERNEL
930 This is the physical address in your flash memory the kernel will
931 be linked for and stored to. This address is dependent on your
935 bool "Kexec system call (EXPERIMENTAL)"
936 depends on EXPERIMENTAL
938 kexec is a system call that implements the ability to shutdown your
939 current kernel, and to start another kernel. It is like a reboot
940 but it is independent of the system firmware. And like a reboot
941 you can start any kernel with it, not just Linux.
943 It is an ongoing process to be certain the hardware in a machine
944 is properly shutdown, so do not be surprised if this code does not
945 initially work for you. It may help to enable device hotplugging
949 bool "Export atags in procfs"
953 Should the atags used to boot the kernel be exported in an "atags"
954 file in procfs. Useful with kexec.
958 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
960 menu "CPU Frequency scaling"
962 source "drivers/cpufreq/Kconfig"
964 config CPU_FREQ_SA1100
966 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
969 config CPU_FREQ_SA1110
971 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
974 config CPU_FREQ_INTEGRATOR
975 tristate "CPUfreq driver for ARM Integrator CPUs"
976 depends on ARCH_INTEGRATOR && CPU_FREQ
979 This enables the CPUfreq driver for ARM Integrator CPUs.
981 For details, take a look at <file:Documentation/cpu-freq>.
986 tristate "CPUfreq driver for i.MX CPUs"
987 depends on ARCH_IMX && CPU_FREQ
990 This enables the CPUfreq driver for i.MX CPUs.
996 depends on CPU_FREQ && ARCH_PXA && PXA25x
998 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1004 menu "Floating point emulation"
1006 comment "At least one emulation must be selected"
1009 bool "NWFPE math emulation"
1010 depends on !AEABI || OABI_COMPAT
1012 Say Y to include the NWFPE floating point emulator in the kernel.
1013 This is necessary to run most binaries. Linux does not currently
1014 support floating point hardware so you need to say Y here even if
1015 your machine has an FPA or floating point co-processor podule.
1017 You may say N here if you are going to load the Acorn FPEmulator
1018 early in the bootup.
1021 bool "Support extended precision"
1022 depends on FPE_NWFPE
1024 Say Y to include 80-bit support in the kernel floating-point
1025 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1026 Note that gcc does not generate 80-bit operations by default,
1027 so in most cases this option only enlarges the size of the
1028 floating point emulator without any good reason.
1030 You almost surely want to say N here.
1033 bool "FastFPE math emulation (EXPERIMENTAL)"
1034 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1036 Say Y here to include the FAST floating point emulator in the kernel.
1037 This is an experimental much faster emulator which now also has full
1038 precision for the mantissa. It does not support any exceptions.
1039 It is very simple, and approximately 3-6 times faster than NWFPE.
1041 It should be sufficient for most programs. It may be not suitable
1042 for scientific calculations, but you have to check this for yourself.
1043 If you do not feel you need a faster FP emulation you should better
1047 bool "VFP-format floating point maths"
1048 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1050 Say Y to include VFP support code in the kernel. This is needed
1051 if your hardware includes a VFP unit.
1053 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1054 release notes and additional status information.
1056 Say N if your target does not have VFP hardware.
1064 bool "Advanced SIMD (NEON) Extension support"
1065 depends on VFPv3 && CPU_V7
1067 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1072 menu "Userspace binary formats"
1074 source "fs/Kconfig.binfmt"
1077 tristate "RISC OS personality"
1080 Say Y here to include the kernel code necessary if you want to run
1081 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1082 experimental; if this sounds frightening, say N and sleep in peace.
1083 You can also say M here to compile this support as a module (which
1084 will be called arthur).
1088 menu "Power management options"
1090 source "kernel/power/Kconfig"
1092 config ARCH_SUSPEND_POSSIBLE
1097 source "net/Kconfig"
1099 menu "Device Drivers"
1101 source "drivers/base/Kconfig"
1103 source "drivers/connector/Kconfig"
1105 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1106 source "drivers/mtd/Kconfig"
1109 source "drivers/parport/Kconfig"
1111 source "drivers/pnp/Kconfig"
1113 source "drivers/block/Kconfig"
1115 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1117 source "drivers/misc/Kconfig"
1119 source "drivers/ide/Kconfig"
1121 source "drivers/scsi/Kconfig"
1123 source "drivers/ata/Kconfig"
1125 source "drivers/md/Kconfig"
1127 source "drivers/message/fusion/Kconfig"
1129 source "drivers/ieee1394/Kconfig"
1131 source "drivers/message/i2o/Kconfig"
1133 source "drivers/net/Kconfig"
1135 source "drivers/isdn/Kconfig"
1137 # input before char - char/joystick depends on it. As does USB.
1139 source "drivers/input/Kconfig"
1141 source "drivers/char/Kconfig"
1143 source "drivers/i2c/Kconfig"
1145 source "drivers/spi/Kconfig"
1147 source "drivers/gpio/Kconfig"
1149 source "drivers/w1/Kconfig"
1151 source "drivers/power/Kconfig"
1153 source "drivers/hwmon/Kconfig"
1155 source "drivers/watchdog/Kconfig"
1157 source "drivers/ssb/Kconfig"
1159 #source "drivers/l3/Kconfig"
1161 source "drivers/mfd/Kconfig"
1163 source "drivers/media/Kconfig"
1165 source "drivers/video/Kconfig"
1167 source "sound/Kconfig"
1169 source "drivers/hid/Kconfig"
1171 source "drivers/usb/Kconfig"
1173 source "drivers/mmc/Kconfig"
1175 source "drivers/leds/Kconfig"
1177 source "drivers/rtc/Kconfig"
1179 source "drivers/dma/Kconfig"
1181 source "drivers/dca/Kconfig"
1183 source "drivers/uio/Kconfig"
1189 source "arch/arm/Kconfig.debug"
1191 source "security/Kconfig"
1193 source "crypto/Kconfig"
1195 source "lib/Kconfig"