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/>.
28 config SYS_SUPPORTS_APM_EMULATION
39 config GENERIC_CLOCKEVENTS
43 config GENERIC_CLOCKEVENTS_BROADCAST
45 depends on GENERIC_CLOCKEVENTS
46 default y if SMP && !LOCAL_TIMERS
59 The Extended Industry Standard Architecture (EISA) bus was
60 developed as an open alternative to the IBM MicroChannel bus.
62 The EISA bus provided some of the features of the IBM MicroChannel
63 bus while maintaining backward compatibility with cards made for
64 the older ISA bus. The EISA bus saw limited use between 1988 and
65 1995 when it was made obsolete by the PCI bus.
67 Say Y here if you are building a kernel for an EISA-based machine.
77 MicroChannel Architecture is found in some IBM PS/2 machines and
78 laptops. It is a bus system similar to PCI or ISA. See
79 <file:Documentation/mca.txt> (and especially the web page given
80 there) before attempting to build an MCA bus kernel.
82 config GENERIC_HARDIRQS
86 config STACKTRACE_SUPPORT
90 config LOCKDEP_SUPPORT
94 config TRACE_IRQFLAGS_SUPPORT
98 config HARDIRQS_SW_RESEND
102 config GENERIC_IRQ_PROBE
106 config GENERIC_LOCKBREAK
109 depends on SMP && PREEMPT
111 config RWSEM_GENERIC_SPINLOCK
115 config RWSEM_XCHGADD_ALGORITHM
118 config ARCH_HAS_ILOG2_U32
122 config ARCH_HAS_ILOG2_U64
126 config GENERIC_HWEIGHT
130 config GENERIC_CALIBRATE_DELAY
134 config ARCH_SUPPORTS_AOUT
137 config ARCH_MAY_HAVE_PC_FDC
144 config GENERIC_ISA_DMA
155 config OPROFILE_ARMV6
157 depends on CPU_V6 && !SMP
158 select OPROFILE_ARM11_CORE
160 config OPROFILE_MPCORE
162 depends on CPU_V6 && SMP
163 select OPROFILE_ARM11_CORE
165 config OPROFILE_ARM11_CORE
172 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
173 default DRAM_BASE if REMAP_VECTORS_TO_RAM
176 The base address of exception vectors.
178 source "init/Kconfig"
183 prompt "ARM system type"
184 default ARCH_VERSATILE
187 bool "Agilent AAEC-2000 based"
190 This enables support for systems based on the Agilent AAEC-2000
192 config ARCH_INTEGRATOR
193 bool "ARM Ltd. Integrator family"
197 Support for ARM's Integrator platform.
200 bool "ARM Ltd. RealView family"
204 select GENERIC_CLOCKEVENTS
206 This enables support for ARM Ltd RealView boards.
208 config ARCH_VERSATILE
209 bool "ARM Ltd. Versatile family"
214 select GENERIC_CLOCKEVENTS
216 This enables support for ARM Ltd Versatile board.
222 This enables support for systems based on the Atmel AT91RM9200,
223 AT91SAM9 and AT91CAP9 processors.
226 bool "Cirrus CL-PS7500FE"
231 Support for the Cirrus Logic PS7500FE system-on-a-chip.
234 bool "Cirrus Logic CLPS711x/EP721x-based"
236 Support for Cirrus Logic 711x/721x based boards.
241 select FOOTBRIDGE_ADDIN
243 Support for Intel's EBSA285 companion chip.
250 This is an evaluation board for the StrongARM processor available
251 from Digital. It has limited hardware on-board, including an
252 Ethernet interface, two PCMCIA sockets, two serial ports and a
262 This enables support for the Cirrus EP93xx series of CPUs.
264 config ARCH_FOOTBRIDGE
268 Support for systems based on the DC21285 companion chip
269 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
272 bool "Hilscher NetX based"
275 This enables support for systems based on the Hilscher NetX Soc
278 bool "Hynix HMS720x-based"
281 This enables support for systems based on the Hynix HMS720x
287 select GENERIC_CLOCKEVENTS
289 Support for Motorola's i.MX family of processors (MX1, MXL).
296 select ARCH_SUPPORTS_MSI
298 Support for Intel's IOP13XX (XScale) family of processors.
306 Support for Intel's 80219 and IOP32X (XScale) family of
315 Support for Intel's IOP33X (XScale) family of processors.
322 Support for Intel's IXP23xx (XScale) family of processors.
325 bool "IXP2400/2800-based"
329 Support for Intel's IXP2400/2800 (XScale) family of processors.
336 select GENERIC_CLOCKEVENTS
338 Support for Intel's IXP4XX (XScale) family of processors.
344 Say Y here if you intend to run this kernel on a LinkUp Systems
345 L7200 Software Development Board which uses an ARM720T processor.
346 Information on this board can be obtained at:
348 <http://www.linkupsys.com/>
350 If you have any questions or comments about the Linux kernel port
351 to this board, send e-mail to <sjhill@cotw.com>.
354 bool "Micrel/Kendin KS8695"
357 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
358 System-on-Chip devices.
361 bool "NetSilicon NS9xxx"
364 select GENERIC_CLOCKEVENTS
366 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
369 <http://www.digi.com/products/microprocessors/index.jsp>
372 bool "Freescale MXC/iMX-based"
375 Support for Freescale MXC/iMX-based family of processors
383 select GENERIC_CLOCKEVENTS
386 Support for the following Marvell Orion 5x series SoCs:
387 Orion-1 (5181), Orion-NAS (5182), Orion-2 (5281.)
390 bool "Philips Nexperia PNX4008 Mobile"
392 This enables support for Philips PNX4008 mobile platform.
395 bool "PXA2xx/PXA3xx-based"
401 select GENERIC_CLOCKEVENTS
404 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
411 select ARCH_MAY_HAVE_PC_FDC
415 On the Acorn Risc-PC, Linux can support the internal IDE disk and
416 CD-ROM interface, serial and parallel port, and the floppy drive.
421 select ARCH_DISCONTIGMEM_ENABLE
422 select ARCH_SPARSEMEM_ENABLE
423 select ARCH_SELECT_MEMORY_MODEL
427 select GENERIC_CLOCKEVENTS
431 Support for StrongARM 11x0 based boards.
434 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
437 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
438 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
439 the Samsung SMDK2410 development board (and derivatives).
447 Support for the StrongARM based Digital DNARD machine, also known
448 as "Shark" (<http://www.shark-linux.de/shark.html>).
453 Say Y here for systems based on one of the Sharp LH7A40X
454 System on a Chip processors. These CPUs include an ARM922T
455 core with a wide array of integrated devices for
456 hand-held and low-power applications.
461 select GENERIC_CLOCKEVENTS
464 Support for TI's DaVinci platform.
471 select GENERIC_CLOCKEVENTS
473 Support for TI's OMAP platform (OMAP1 and OMAP2).
476 bool "Qualcomm MSM7X00A"
478 select GENERIC_CLOCKEVENTS
480 Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
481 apps processor of the MSM7X00A and depends on a shared memory
482 interface to the ARM9 modem processor which runs the baseband stack
483 and controls some vital subsystems (clock and power control, etc).
484 <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>
488 source "arch/arm/mach-clps711x/Kconfig"
490 source "arch/arm/mach-ep93xx/Kconfig"
492 source "arch/arm/mach-footbridge/Kconfig"
494 source "arch/arm/mach-integrator/Kconfig"
496 source "arch/arm/mach-iop32x/Kconfig"
498 source "arch/arm/mach-iop33x/Kconfig"
500 source "arch/arm/mach-iop13xx/Kconfig"
502 source "arch/arm/mach-ixp4xx/Kconfig"
504 source "arch/arm/mach-ixp2000/Kconfig"
506 source "arch/arm/mach-ixp23xx/Kconfig"
508 source "arch/arm/mach-pxa/Kconfig"
510 source "arch/arm/mach-sa1100/Kconfig"
512 source "arch/arm/plat-omap/Kconfig"
514 source "arch/arm/mach-omap1/Kconfig"
516 source "arch/arm/mach-omap2/Kconfig"
518 source "arch/arm/mach-orion5x/Kconfig"
520 source "arch/arm/plat-s3c24xx/Kconfig"
521 source "arch/arm/plat-s3c/Kconfig"
524 source "arch/arm/mach-s3c2400/Kconfig"
525 source "arch/arm/mach-s3c2410/Kconfig"
526 source "arch/arm/mach-s3c2412/Kconfig"
527 source "arch/arm/mach-s3c2440/Kconfig"
528 source "arch/arm/mach-s3c2442/Kconfig"
529 source "arch/arm/mach-s3c2443/Kconfig"
532 source "arch/arm/mach-lh7a40x/Kconfig"
534 source "arch/arm/mach-imx/Kconfig"
536 source "arch/arm/mach-h720x/Kconfig"
538 source "arch/arm/mach-versatile/Kconfig"
540 source "arch/arm/mach-aaec2000/Kconfig"
542 source "arch/arm/mach-realview/Kconfig"
544 source "arch/arm/mach-at91/Kconfig"
546 source "arch/arm/plat-mxc/Kconfig"
548 source "arch/arm/mach-netx/Kconfig"
550 source "arch/arm/mach-ns9xxx/Kconfig"
552 source "arch/arm/mach-davinci/Kconfig"
554 source "arch/arm/mach-ks8695/Kconfig"
556 source "arch/arm/mach-msm/Kconfig"
558 # Definitions to make life easier
568 source arch/arm/mm/Kconfig
571 bool "Enable iWMMXt support"
572 depends on CPU_XSCALE || CPU_XSC3
573 default y if PXA27x || PXA3xx
575 Enable support for iWMMXt context switching at run time if
576 running on a CPU that supports it.
578 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
581 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
585 source "arch/arm/Kconfig-nommu"
590 source "arch/arm/common/Kconfig"
592 config FORCE_MAX_ZONEORDER
605 Find out whether you have ISA slots on your motherboard. ISA is the
606 name of a bus system, i.e. the way the CPU talks to the other stuff
607 inside your box. Other bus systems are PCI, EISA, MicroChannel
608 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
609 newer boards don't support it. If you have ISA, say Y, otherwise N.
611 # Select ISA DMA controller support
616 # Select ISA DMA interface
621 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
623 Find out whether you have a PCI motherboard. PCI is the name of a
624 bus system, i.e. the way the CPU talks to the other stuff inside
625 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
626 VESA. If you have PCI, say Y, otherwise N.
631 # Select the host bridge type
632 config PCI_HOST_VIA82C505
634 depends on PCI && ARCH_SHARK
637 config PCI_HOST_ITE8152
639 depends on PCI && MACH_ARMCORE
643 source "drivers/pci/Kconfig"
645 source "drivers/pcmcia/Kconfig"
649 menu "Kernel Features"
651 source "kernel/time/Kconfig"
654 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
655 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
657 This enables support for systems with more than one CPU. If you have
658 a system with only one CPU, like most personal computers, say N. If
659 you have a system with more than one CPU, say Y.
661 If you say N here, the kernel will run on single and multiprocessor
662 machines, but will use only one CPU of a multiprocessor machine. If
663 you say Y here, the kernel will run on many, but not all, single
664 processor machines. On a single processor machine, the kernel will
665 run faster if you say N here.
667 See also <file:Documentation/i386/IO-APIC.txt>,
668 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
669 <http://www.linuxdoc.org/docs.html#howto>.
671 If you don't know what to do here, say N.
674 int "Maximum number of CPUs (2-32)"
680 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
681 depends on SMP && HOTPLUG && EXPERIMENTAL
683 Say Y here to experiment with turning CPUs off and on. CPUs
684 can be controlled through /sys/devices/system/cpu.
687 bool "Use local timer interrupts"
688 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
691 Enable support for local timers on SMP platforms, rather then the
692 legacy IPI broadcast method. Local timers allows the system
693 accounting to be spread across the timer interval, preventing a
694 "thundering herd" at every timer tick.
697 bool "Preemptible Kernel (EXPERIMENTAL)"
698 depends on EXPERIMENTAL
700 This option reduces the latency of the kernel when reacting to
701 real-time or interactive events by allowing a low priority process to
702 be preempted even if it is in kernel mode executing a system call.
703 This allows applications to run more reliably even when the system is
706 Say Y here if you are building a kernel for a desktop, embedded
707 or real-time system. Say N if you are unsure.
710 bool "Dynamic tick timer"
711 depends on !GENERIC_CLOCKEVENTS
713 Select this option if you want to disable continuous timer ticks
714 and have them programmed to occur as required. This option saves
715 power as the system can remain in idle state for longer.
717 By default dynamic tick is disabled during the boot, and can be
718 manually enabled with:
720 echo 1 > /sys/devices/system/timer/timer0/dyn_tick
722 Alternatively, if you want dynamic tick automatically enabled
723 during boot, pass "dyntick=enable" via the kernel command string.
725 Please note that dynamic tick may affect the accuracy of
726 timekeeping on some platforms depending on the implementation.
727 Currently at least OMAP, PXA2xx and SA11x0 platforms are known
728 to have accurate timekeeping with dynamic tick.
732 default 128 if ARCH_L7200
733 default 200 if ARCH_EBSA110 || ARCH_S3C2410
734 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
735 default AT91_TIMER_HZ if ARCH_AT91
739 bool "Use the ARM EABI to compile the kernel"
741 This option allows for the kernel to be compiled using the latest
742 ARM ABI (aka EABI). This is only useful if you are using a user
743 space environment that is also compiled with EABI.
745 Since there are major incompatibilities between the legacy ABI and
746 EABI, especially with regard to structure member alignment, this
747 option also changes the kernel syscall calling convention to
748 disambiguate both ABIs and allow for backward compatibility support
749 (selected with CONFIG_OABI_COMPAT).
751 To use this you need GCC version 4.0.0 or later.
754 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
755 depends on AEABI && EXPERIMENTAL
758 This option preserves the old syscall interface along with the
759 new (ARM EABI) one. It also provides a compatibility layer to
760 intercept syscalls that have structure arguments which layout
761 in memory differs between the legacy ABI and the new ARM EABI
762 (only for non "thumb" binaries). This option adds a tiny
763 overhead to all syscalls and produces a slightly larger kernel.
764 If you know you'll be using only pure EABI user space then you
765 can say N here. If this option is not selected and you attempt
766 to execute a legacy ABI binary then the result will be
767 UNPREDICTABLE (in fact it can be predicted that it won't work
768 at all). If in doubt say Y.
770 config ARCH_DISCONTIGMEM_ENABLE
772 default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
774 Say Y to support efficient handling of discontiguous physical memory,
775 for architectures which are either NUMA (Non-Uniform Memory Access)
776 or have huge holes in the physical address space for other reasons.
777 See <file:Documentation/vm/numa> for more.
779 config ARCH_SPARSEMEM_ENABLE
782 config ARCH_SELECT_MEMORY_MODEL
787 default "4" if ARCH_LH7A40X
789 depends on NEED_MULTIPLE_NODES
794 bool "Timer and CPU usage LEDs"
795 depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
796 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
797 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
798 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
799 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
800 ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
801 ARCH_KS8695 || MACH_RD88F5182
803 If you say Y here, the LEDs on your machine will be used
804 to provide useful information about your current system status.
806 If you are compiling a kernel for a NetWinder or EBSA-285, you will
807 be able to select which LEDs are active using the options below. If
808 you are compiling a kernel for the EBSA-110 or the LART however, the
809 red LED will simply flash regularly to indicate that the system is
810 still functional. It is safe to say Y here if you have a CATS
811 system, but the driver will do nothing.
814 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
815 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
816 || MACH_OMAP_PERSEUS2
818 depends on !GENERIC_CLOCKEVENTS
819 default y if ARCH_EBSA110
821 If you say Y here, one of the system LEDs (the green one on the
822 NetWinder, the amber one on the EBSA285, or the red one on the LART)
823 will flash regularly to indicate that the system is still
824 operational. This is mainly useful to kernel hackers who are
825 debugging unstable kernels.
827 The LART uses the same LED for both Timer LED and CPU usage LED
828 functions. You may choose to use both, but the Timer LED function
829 will overrule the CPU usage LED.
832 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
834 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
835 || MACH_OMAP_PERSEUS2
838 If you say Y here, the red LED will be used to give a good real
839 time indication of CPU usage, by lighting whenever the idle task
840 is not currently executing.
842 The LART uses the same LED for both Timer LED and CPU usage LED
843 functions. You may choose to use both, but the Timer LED function
844 will overrule the CPU usage LED.
846 config ALIGNMENT_TRAP
848 depends on CPU_CP15_MMU
849 default y if !ARCH_EBSA110
851 ARM processors cannot fetch/store information which is not
852 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
853 address divisible by 4. On 32-bit ARM processors, these non-aligned
854 fetch/store instructions will be emulated in software if you say
855 here, which has a severe performance impact. This is necessary for
856 correct operation of some network protocols. With an IP-only
857 configuration it is safe to say N, otherwise say Y.
863 # Compressed boot loader in ROM. Yes, we really want to ask about
864 # TEXT and BSS so we preserve their values in the config files.
865 config ZBOOT_ROM_TEXT
866 hex "Compressed ROM boot loader base address"
869 The physical address at which the ROM-able zImage is to be
870 placed in the target. Platforms which normally make use of
871 ROM-able zImage formats normally set this to a suitable
872 value in their defconfig file.
874 If ZBOOT_ROM is not enabled, this has no effect.
877 hex "Compressed ROM boot loader BSS address"
880 The base address of an area of read/write memory in the target
881 for the ROM-able zImage which must be available while the
882 decompressor is running. It must be large enough to hold the
883 entire decompressed kernel plus an additional 128 KiB.
884 Platforms which normally make use of ROM-able zImage formats
885 normally set this to a suitable value in their defconfig file.
887 If ZBOOT_ROM is not enabled, this has no effect.
890 bool "Compressed boot loader in ROM/flash"
891 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
893 Say Y here if you intend to execute your compressed kernel image
894 (zImage) directly from ROM or flash. If unsure, say N.
897 string "Default kernel command string"
900 On some architectures (EBSA110 and CATS), there is currently no way
901 for the boot loader to pass arguments to the kernel. For these
902 architectures, you should supply some command-line options at build
903 time by entering them here. As a minimum, you should specify the
904 memory size and the root device (e.g., mem=64M root=/dev/nfs).
907 bool "Kernel Execute-In-Place from ROM"
908 depends on !ZBOOT_ROM
910 Execute-In-Place allows the kernel to run from non-volatile storage
911 directly addressable by the CPU, such as NOR flash. This saves RAM
912 space since the text section of the kernel is not loaded from flash
913 to RAM. Read-write sections, such as the data section and stack,
914 are still copied to RAM. The XIP kernel is not compressed since
915 it has to run directly from flash, so it will take more space to
916 store it. The flash address used to link the kernel object files,
917 and for storing it, is configuration dependent. Therefore, if you
918 say Y here, you must know the proper physical address where to
919 store the kernel image depending on your own flash memory usage.
921 Also note that the make target becomes "make xipImage" rather than
922 "make zImage" or "make Image". The final kernel binary to put in
923 ROM memory will be arch/arm/boot/xipImage.
928 hex "XIP Kernel Physical Location"
929 depends on XIP_KERNEL
932 This is the physical address in your flash memory the kernel will
933 be linked for and stored to. This address is dependent on your
937 bool "Kexec system call (EXPERIMENTAL)"
938 depends on EXPERIMENTAL
940 kexec is a system call that implements the ability to shutdown your
941 current kernel, and to start another kernel. It is like a reboot
942 but it is independent of the system firmware. And like a reboot
943 you can start any kernel with it, not just Linux.
945 It is an ongoing process to be certain the hardware in a machine
946 is properly shutdown, so do not be surprised if this code does not
947 initially work for you. It may help to enable device hotplugging
951 bool "Export atags in procfs"
955 Should the atags used to boot the kernel be exported in an "atags"
956 file in procfs. Useful with kexec.
960 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
962 menu "CPU Frequency scaling"
964 source "drivers/cpufreq/Kconfig"
966 config CPU_FREQ_SA1100
968 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
971 config CPU_FREQ_SA1110
973 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
976 config CPU_FREQ_INTEGRATOR
977 tristate "CPUfreq driver for ARM Integrator CPUs"
978 depends on ARCH_INTEGRATOR && CPU_FREQ
981 This enables the CPUfreq driver for ARM Integrator CPUs.
983 For details, take a look at <file:Documentation/cpu-freq>.
988 tristate "CPUfreq driver for i.MX CPUs"
989 depends on ARCH_IMX && CPU_FREQ
992 This enables the CPUfreq driver for i.MX CPUs.
998 depends on CPU_FREQ && ARCH_PXA && PXA25x
1000 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1006 menu "Floating point emulation"
1008 comment "At least one emulation must be selected"
1011 bool "NWFPE math emulation"
1012 depends on !AEABI || OABI_COMPAT
1014 Say Y to include the NWFPE floating point emulator in the kernel.
1015 This is necessary to run most binaries. Linux does not currently
1016 support floating point hardware so you need to say Y here even if
1017 your machine has an FPA or floating point co-processor podule.
1019 You may say N here if you are going to load the Acorn FPEmulator
1020 early in the bootup.
1023 bool "Support extended precision"
1024 depends on FPE_NWFPE
1026 Say Y to include 80-bit support in the kernel floating-point
1027 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1028 Note that gcc does not generate 80-bit operations by default,
1029 so in most cases this option only enlarges the size of the
1030 floating point emulator without any good reason.
1032 You almost surely want to say N here.
1035 bool "FastFPE math emulation (EXPERIMENTAL)"
1036 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1038 Say Y here to include the FAST floating point emulator in the kernel.
1039 This is an experimental much faster emulator which now also has full
1040 precision for the mantissa. It does not support any exceptions.
1041 It is very simple, and approximately 3-6 times faster than NWFPE.
1043 It should be sufficient for most programs. It may be not suitable
1044 for scientific calculations, but you have to check this for yourself.
1045 If you do not feel you need a faster FP emulation you should better
1049 bool "VFP-format floating point maths"
1050 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1052 Say Y to include VFP support code in the kernel. This is needed
1053 if your hardware includes a VFP unit.
1055 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1056 release notes and additional status information.
1058 Say N if your target does not have VFP hardware.
1066 bool "Advanced SIMD (NEON) Extension support"
1067 depends on VFPv3 && CPU_V7
1069 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1074 menu "Userspace binary formats"
1076 source "fs/Kconfig.binfmt"
1079 tristate "RISC OS personality"
1082 Say Y here to include the kernel code necessary if you want to run
1083 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1084 experimental; if this sounds frightening, say N and sleep in peace.
1085 You can also say M here to compile this support as a module (which
1086 will be called arthur).
1090 menu "Power management options"
1092 source "kernel/power/Kconfig"
1094 config ARCH_SUSPEND_POSSIBLE
1099 source "net/Kconfig"
1101 menu "Device Drivers"
1103 source "drivers/base/Kconfig"
1105 source "drivers/connector/Kconfig"
1107 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1108 source "drivers/mtd/Kconfig"
1111 source "drivers/parport/Kconfig"
1113 source "drivers/pnp/Kconfig"
1115 source "drivers/block/Kconfig"
1117 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1119 source "drivers/misc/Kconfig"
1121 source "drivers/ide/Kconfig"
1123 source "drivers/scsi/Kconfig"
1125 source "drivers/ata/Kconfig"
1127 source "drivers/md/Kconfig"
1129 source "drivers/message/fusion/Kconfig"
1131 source "drivers/ieee1394/Kconfig"
1133 source "drivers/message/i2o/Kconfig"
1135 source "drivers/net/Kconfig"
1137 source "drivers/isdn/Kconfig"
1139 # input before char - char/joystick depends on it. As does USB.
1141 source "drivers/input/Kconfig"
1143 source "drivers/char/Kconfig"
1145 source "drivers/i2c/Kconfig"
1147 source "drivers/spi/Kconfig"
1149 source "drivers/gpio/Kconfig"
1151 source "drivers/w1/Kconfig"
1153 source "drivers/power/Kconfig"
1155 source "drivers/hwmon/Kconfig"
1157 source "drivers/watchdog/Kconfig"
1159 source "drivers/ssb/Kconfig"
1161 #source "drivers/l3/Kconfig"
1163 source "drivers/mfd/Kconfig"
1165 source "drivers/media/Kconfig"
1167 source "drivers/video/Kconfig"
1169 source "sound/Kconfig"
1171 source "drivers/hid/Kconfig"
1173 source "drivers/usb/Kconfig"
1175 source "drivers/mmc/Kconfig"
1177 source "drivers/leds/Kconfig"
1179 source "drivers/rtc/Kconfig"
1181 source "drivers/dma/Kconfig"
1183 source "drivers/dca/Kconfig"
1185 source "drivers/uio/Kconfig"
1191 source "arch/arm/Kconfig.debug"
1193 source "security/Kconfig"
1195 source "crypto/Kconfig"
1197 source "lib/Kconfig"