2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
6 mainmenu "Linux Kernel Configuration"
14 select SYS_SUPPORTS_APM_EMULATION
17 select HAVE_KPROBES if (!XIP_KERNEL)
18 select HAVE_KRETPROBES if (HAVE_KPROBES)
19 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
20 select HAVE_GENERIC_DMA_COHERENT
22 The ARM series is a line of low-power-consumption RISC chip designs
23 licensed by ARM Ltd and targeted at embedded applications and
24 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
25 manufactured, but legacy ARM-based PC hardware remains popular in
26 Europe. There is an ARM Linux project with a web page at
27 <http://www.arm.linux.org.uk/>.
32 config SYS_SUPPORTS_APM_EMULATION
41 config GENERIC_CLOCKEVENTS
44 config GENERIC_CLOCKEVENTS_BROADCAST
46 depends on GENERIC_CLOCKEVENTS
47 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 HAVE_LATENCYTOP_SUPPORT
95 config LOCKDEP_SUPPORT
99 config TRACE_IRQFLAGS_SUPPORT
103 config HARDIRQS_SW_RESEND
107 config GENERIC_IRQ_PROBE
111 config GENERIC_LOCKBREAK
114 depends on SMP && PREEMPT
116 config RWSEM_GENERIC_SPINLOCK
120 config RWSEM_XCHGADD_ALGORITHM
123 config ARCH_HAS_ILOG2_U32
126 config ARCH_HAS_ILOG2_U64
129 config ARCH_HAS_CPUFREQ
132 Internal node to signify that the ARCH has CPUFREQ support
133 and that the relevant menu configurations are displayed for
136 config GENERIC_HWEIGHT
140 config GENERIC_CALIBRATE_DELAY
144 config ARCH_MAY_HAVE_PC_FDC
150 config GENERIC_ISA_DMA
159 config GENERIC_HARDIRQS_NO__DO_IRQ
164 config OPROFILE_ARMV6
166 depends on CPU_V6 && !SMP
167 select OPROFILE_ARM11_CORE
169 config OPROFILE_MPCORE
171 depends on CPU_V6 && SMP
172 select OPROFILE_ARM11_CORE
174 config OPROFILE_ARM11_CORE
177 config OPROFILE_ARMV7
179 depends on CPU_V7 && !SMP
186 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
187 default DRAM_BASE if REMAP_VECTORS_TO_RAM
190 The base address of exception vectors.
192 source "init/Kconfig"
194 source "kernel/Kconfig.freezer"
199 prompt "ARM system type"
200 default ARCH_VERSATILE
203 bool "Agilent AAEC-2000 based"
208 This enables support for systems based on the Agilent AAEC-2000
210 config ARCH_INTEGRATOR
211 bool "ARM Ltd. Integrator family"
213 select ARCH_HAS_CPUFREQ
218 Support for ARM's Integrator platform.
221 bool "ARM Ltd. RealView family"
227 select GENERIC_CLOCKEVENTS
229 This enables support for ARM Ltd RealView boards.
231 config ARCH_VERSATILE
232 bool "ARM Ltd. Versatile family"
239 select GENERIC_CLOCKEVENTS
241 This enables support for ARM Ltd Versatile board.
246 select ARCH_REQUIRE_GPIOLIB
249 This enables support for systems based on the Atmel AT91RM9200,
250 AT91SAM9 and AT91CAP9 processors.
253 bool "Cirrus Logic CLPS711x/EP721x-based"
256 Support for Cirrus Logic 711x/721x based boards.
259 bool "Cortina Systems Gemini"
262 select ARCH_REQUIRE_GPIOLIB
264 Support for the Cortina Systems Gemini family SoCs
272 This is an evaluation board for the StrongARM processor available
273 from Digital. It has limited hardware on-board, including an
274 Ethernet interface, two PCMCIA sockets, two serial ports and a
285 select ARCH_REQUIRE_GPIOLIB
286 select ARCH_HAS_HOLES_MEMORYMODEL
288 This enables support for the Cirrus EP93xx series of CPUs.
290 config ARCH_FOOTBRIDGE
295 Support for systems based on the DC21285 companion chip
296 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
299 bool "Freescale MXC/iMX-based"
301 select GENERIC_CLOCKEVENTS
304 select ARCH_REQUIRE_GPIOLIB
307 Support for Freescale MXC/iMX-based family of processors
310 bool "Freescale STMP3xxx"
314 select ARCH_REQUIRE_GPIOLIB
316 select GENERIC_CLOCKEVENTS
318 select USB_ARCH_HAS_EHCI
320 Support for systems based on the Freescale 3xxx CPUs.
323 bool "Hilscher NetX based"
326 select GENERIC_CLOCKEVENTS
329 This enables support for systems based on the Hilscher NetX Soc
332 bool "Hynix HMS720x-based"
336 This enables support for systems based on the Hynix HMS720x
344 select ARCH_SUPPORTS_MSI
347 Support for Intel's IOP13XX (XScale) family of processors.
356 select ARCH_REQUIRE_GPIOLIB
358 Support for Intel's 80219 and IOP32X (XScale) family of
368 select ARCH_REQUIRE_GPIOLIB
370 Support for Intel's IOP33X (XScale) family of processors.
378 Support for Intel's IXP23xx (XScale) family of processors.
381 bool "IXP2400/2800-based"
386 Support for Intel's IXP2400/2800 (XScale) family of processors.
394 select GENERIC_CLOCKEVENTS
395 select DMABOUNCE if PCI
397 Support for Intel's IXP4XX (XScale) family of processors.
404 Say Y here if you intend to run this kernel on a LinkUp Systems
405 L7200 Software Development Board which uses an ARM720T processor.
406 Information on this board can be obtained at:
408 <http://www.linkupsys.com/>
410 If you have any questions or comments about the Linux kernel port
411 to this board, send e-mail to <sjhill@cotw.com>.
414 bool "Marvell Kirkwood"
418 select ARCH_REQUIRE_GPIOLIB
420 select GENERIC_CLOCKEVENTS
423 Support for the following Marvell Kirkwood series SoCs:
424 88F6180, 88F6192 and 88F6281.
427 bool "Marvell Loki (88RC8480)"
430 select GENERIC_CLOCKEVENTS
433 Support for the Marvell Loki (88RC8480) SoC.
436 bool "Marvell MV78xx0"
440 select ARCH_REQUIRE_GPIOLIB
442 select GENERIC_CLOCKEVENTS
445 Support for the following Marvell MV78xx0 series SoCs:
454 select ARCH_REQUIRE_GPIOLIB
456 select GENERIC_CLOCKEVENTS
459 Support for the following Marvell Orion 5x series SoCs:
460 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
461 Orion-2 (5281), Orion-1-90 (6183).
464 bool "Marvell PXA168/910"
467 select ARCH_REQUIRE_GPIOLIB
471 select GENERIC_CLOCKEVENTS
475 Support for Marvell's PXA168/910 processor line.
478 bool "Micrel/Kendin KS8695"
481 select ARCH_REQUIRE_GPIOLIB
483 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
484 System-on-Chip devices.
487 bool "NetSilicon NS9xxx"
491 select GENERIC_CLOCKEVENTS
494 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
497 <http://www.digi.com/products/microprocessors/index.jsp>
500 bool "Nuvoton W90X900 CPU"
502 select ARCH_REQUIRE_GPIOLIB
506 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
507 can login www.mcuos.com or www.nuvoton.com to know more.
510 bool "Philips Nexperia PNX4008 Mobile"
514 This enables support for Philips PNX4008 mobile platform.
517 bool "PXA2xx/PXA3xx-based"
520 select ARCH_HAS_CPUFREQ
524 select ARCH_REQUIRE_GPIOLIB
526 select GENERIC_CLOCKEVENTS
530 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
536 select GENERIC_CLOCKEVENTS
538 Support for Qualcomm MSM7K based systems. This runs on the ARM11
539 apps processor of the MSM7K 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).
548 select ARCH_MAY_HAVE_PC_FDC
549 select HAVE_PATA_PLATFORM
552 select ARCH_SPARSEMEM_ENABLE
554 On the Acorn Risc-PC, Linux can support the internal IDE disk and
555 CD-ROM interface, serial and parallel port, and the floppy drive.
561 select ARCH_SPARSEMEM_ENABLE
563 select ARCH_HAS_CPUFREQ
566 select GENERIC_CLOCKEVENTS
569 select ARCH_REQUIRE_GPIOLIB
571 Support for StrongARM 11x0 based boards.
574 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
576 select ARCH_HAS_CPUFREQ
579 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
580 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
581 the Samsung SMDK2410 development board (and derivatives).
584 bool "Samsung S3C64XX"
587 select ARCH_HAS_CPUFREQ
589 Samsung S3C64XX series based systems
599 Support for the StrongARM based Digital DNARD machine, also known
600 as "Shark" (<http://www.shark-linux.de/shark.html>).
605 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
606 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
608 Say Y here for systems based on one of the Sharp LH7A40X
609 System on a Chip processors. These CPUs include an ARM922T
610 core with a wide array of integrated devices for
611 hand-held and low-power applications.
614 bool "ST-Ericsson U300 Series"
620 select GENERIC_CLOCKEVENTS
625 Support for ST-Ericsson U300 series mobile platforms.
631 select GENERIC_CLOCKEVENTS
633 select ARCH_REQUIRE_GPIOLIB
638 select GENERIC_ALLOCATOR
640 Support for TI's DaVinci platform.
646 select ARCH_REQUIRE_GPIOLIB
647 select ARCH_HAS_CPUFREQ
649 select GENERIC_CLOCKEVENTS
651 Support for TI's OMAP platform (OMAP1 and OMAP2).
655 source "arch/arm/mach-clps711x/Kconfig"
657 source "arch/arm/mach-ep93xx/Kconfig"
659 source "arch/arm/mach-footbridge/Kconfig"
661 source "arch/arm/mach-gemini/Kconfig"
663 source "arch/arm/mach-integrator/Kconfig"
665 source "arch/arm/mach-iop32x/Kconfig"
667 source "arch/arm/mach-iop33x/Kconfig"
669 source "arch/arm/mach-iop13xx/Kconfig"
671 source "arch/arm/mach-ixp4xx/Kconfig"
673 source "arch/arm/mach-ixp2000/Kconfig"
675 source "arch/arm/mach-ixp23xx/Kconfig"
677 source "arch/arm/mach-loki/Kconfig"
679 source "arch/arm/mach-mv78xx0/Kconfig"
681 source "arch/arm/mach-pxa/Kconfig"
682 source "arch/arm/plat-pxa/Kconfig"
684 source "arch/arm/mach-mmp/Kconfig"
686 source "arch/arm/mach-sa1100/Kconfig"
688 source "arch/arm/plat-omap/Kconfig"
690 source "arch/arm/mach-omap1/Kconfig"
692 source "arch/arm/mach-omap2/Kconfig"
694 source "arch/arm/mach-orion5x/Kconfig"
696 source "arch/arm/mach-kirkwood/Kconfig"
698 source "arch/arm/plat-s3c24xx/Kconfig"
699 source "arch/arm/plat-s3c64xx/Kconfig"
700 source "arch/arm/plat-s3c/Kconfig"
703 source "arch/arm/mach-s3c2400/Kconfig"
704 source "arch/arm/mach-s3c2410/Kconfig"
705 source "arch/arm/mach-s3c2412/Kconfig"
706 source "arch/arm/mach-s3c2440/Kconfig"
707 source "arch/arm/mach-s3c2442/Kconfig"
708 source "arch/arm/mach-s3c2443/Kconfig"
712 source "arch/arm/mach-s3c6400/Kconfig"
713 source "arch/arm/mach-s3c6410/Kconfig"
716 source "arch/arm/plat-stmp3xxx/Kconfig"
718 source "arch/arm/mach-lh7a40x/Kconfig"
720 source "arch/arm/mach-h720x/Kconfig"
722 source "arch/arm/mach-versatile/Kconfig"
724 source "arch/arm/mach-aaec2000/Kconfig"
726 source "arch/arm/mach-realview/Kconfig"
728 source "arch/arm/mach-at91/Kconfig"
730 source "arch/arm/plat-mxc/Kconfig"
732 source "arch/arm/mach-netx/Kconfig"
734 source "arch/arm/mach-ns9xxx/Kconfig"
736 source "arch/arm/mach-davinci/Kconfig"
738 source "arch/arm/mach-ks8695/Kconfig"
740 source "arch/arm/mach-msm/Kconfig"
742 source "arch/arm/mach-u300/Kconfig"
744 source "arch/arm/mach-w90x900/Kconfig"
746 # Definitions to make life easier
759 source arch/arm/mm/Kconfig
762 bool "Enable iWMMXt support"
763 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
764 default y if PXA27x || PXA3xx || ARCH_MMP
766 Enable support for iWMMXt context switching at run time if
767 running on a CPU that supports it.
769 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
772 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
776 source "arch/arm/Kconfig-nommu"
779 config ARM_ERRATA_411920
780 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
781 depends on CPU_V6 && !SMP
783 Invalidation of the Instruction Cache operation can
784 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
785 It does not affect the MPCore. This option enables the ARM Ltd.
786 recommended workaround.
788 config ARM_ERRATA_430973
789 bool "ARM errata: Stale prediction on replaced interworking branch"
792 This option enables the workaround for the 430973 Cortex-A8
793 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
794 interworking branch is replaced with another code sequence at the
795 same virtual address, whether due to self-modifying code or virtual
796 to physical address re-mapping, Cortex-A8 does not recover from the
797 stale interworking branch prediction. This results in Cortex-A8
798 executing the new code sequence in the incorrect ARM or Thumb state.
799 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
800 and also flushes the branch target cache at every context switch.
801 Note that setting specific bits in the ACTLR register may not be
802 available in non-secure mode.
804 config ARM_ERRATA_458693
805 bool "ARM errata: Processor deadlock when a false hazard is created"
808 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
809 erratum. For very specific sequences of memory operations, it is
810 possible for a hazard condition intended for a cache line to instead
811 be incorrectly associated with a different cache line. This false
812 hazard might then cause a processor deadlock. The workaround enables
813 the L1 caching of the NEON accesses and disables the PLD instruction
814 in the ACTLR register. Note that setting specific bits in the ACTLR
815 register may not be available in non-secure mode.
817 config ARM_ERRATA_460075
818 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
821 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
822 erratum. Any asynchronous access to the L2 cache may encounter a
823 situation in which recent store transactions to the L2 cache are lost
824 and overwritten with stale memory contents from external memory. The
825 workaround disables the write-allocate mode for the L2 cache via the
826 ACTLR register. Note that setting specific bits in the ACTLR register
827 may not be available in non-secure mode.
831 source "arch/arm/common/Kconfig"
833 config FORCE_MAX_ZONEORDER
846 Find out whether you have ISA slots on your motherboard. ISA is the
847 name of a bus system, i.e. the way the CPU talks to the other stuff
848 inside your box. Other bus systems are PCI, EISA, MicroChannel
849 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
850 newer boards don't support it. If you have ISA, say Y, otherwise N.
852 # Select ISA DMA controller support
857 # Select ISA DMA interface
862 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
864 Find out whether you have a PCI motherboard. PCI is the name of a
865 bus system, i.e. the way the CPU talks to the other stuff inside
866 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
867 VESA. If you have PCI, say Y, otherwise N.
872 # Select the host bridge type
873 config PCI_HOST_VIA82C505
875 depends on PCI && ARCH_SHARK
878 config PCI_HOST_ITE8152
880 depends on PCI && MACH_ARMCORE
884 source "drivers/pci/Kconfig"
886 source "drivers/pcmcia/Kconfig"
890 menu "Kernel Features"
892 source "kernel/time/Kconfig"
895 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
896 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
897 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
898 depends on GENERIC_CLOCKEVENTS
899 select USE_GENERIC_SMP_HELPERS
900 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4)
902 This enables support for systems with more than one CPU. If you have
903 a system with only one CPU, like most personal computers, say N. If
904 you have a system with more than one CPU, say Y.
906 If you say N here, the kernel will run on single and multiprocessor
907 machines, but will use only one CPU of a multiprocessor machine. If
908 you say Y here, the kernel will run on many, but not all, single
909 processor machines. On a single processor machine, the kernel will
910 run faster if you say N here.
912 See also <file:Documentation/i386/IO-APIC.txt>,
913 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
914 <http://www.linuxdoc.org/docs.html#howto>.
916 If you don't know what to do here, say N.
922 This option enables support for the ARM system coherency unit
928 This options enables support for the ARM timer and watchdog unit
931 prompt "Memory split"
934 Select the desired split between kernel and user memory.
936 If you are not absolutely sure what you are doing, leave this
940 bool "3G/1G user/kernel split"
942 bool "2G/2G user/kernel split"
944 bool "1G/3G user/kernel split"
949 default 0x40000000 if VMSPLIT_1G
950 default 0x80000000 if VMSPLIT_2G
954 int "Maximum number of CPUs (2-32)"
960 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
961 depends on SMP && HOTPLUG && EXPERIMENTAL
963 Say Y here to experiment with turning CPUs off and on. CPUs
964 can be controlled through /sys/devices/system/cpu.
967 bool "Use local timer interrupts"
968 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
969 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
971 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4)
973 Enable support for local timers on SMP platforms, rather then the
974 legacy IPI broadcast method. Local timers allows the system
975 accounting to be spread across the timer interval, preventing a
976 "thundering herd" at every timer tick.
979 bool "Preemptible Kernel (EXPERIMENTAL)"
980 depends on EXPERIMENTAL
982 This option reduces the latency of the kernel when reacting to
983 real-time or interactive events by allowing a low priority process to
984 be preempted even if it is in kernel mode executing a system call.
985 This allows applications to run more reliably even when the system is
988 Say Y here if you are building a kernel for a desktop, embedded
989 or real-time system. Say N if you are unsure.
993 default 128 if ARCH_L7200
994 default 200 if ARCH_EBSA110 || ARCH_S3C2410
995 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
996 default AT91_TIMER_HZ if ARCH_AT91
1000 bool "Use the ARM EABI to compile the kernel"
1002 This option allows for the kernel to be compiled using the latest
1003 ARM ABI (aka EABI). This is only useful if you are using a user
1004 space environment that is also compiled with EABI.
1006 Since there are major incompatibilities between the legacy ABI and
1007 EABI, especially with regard to structure member alignment, this
1008 option also changes the kernel syscall calling convention to
1009 disambiguate both ABIs and allow for backward compatibility support
1010 (selected with CONFIG_OABI_COMPAT).
1012 To use this you need GCC version 4.0.0 or later.
1015 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1016 depends on AEABI && EXPERIMENTAL
1019 This option preserves the old syscall interface along with the
1020 new (ARM EABI) one. It also provides a compatibility layer to
1021 intercept syscalls that have structure arguments which layout
1022 in memory differs between the legacy ABI and the new ARM EABI
1023 (only for non "thumb" binaries). This option adds a tiny
1024 overhead to all syscalls and produces a slightly larger kernel.
1025 If you know you'll be using only pure EABI user space then you
1026 can say N here. If this option is not selected and you attempt
1027 to execute a legacy ABI binary then the result will be
1028 UNPREDICTABLE (in fact it can be predicted that it won't work
1029 at all). If in doubt say Y.
1031 config ARCH_HAS_HOLES_MEMORYMODEL
1034 # Discontigmem is deprecated
1035 config ARCH_DISCONTIGMEM_ENABLE
1038 config ARCH_SPARSEMEM_ENABLE
1041 config ARCH_SPARSEMEM_DEFAULT
1042 def_bool ARCH_SPARSEMEM_ENABLE
1044 config ARCH_SELECT_MEMORY_MODEL
1045 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1049 default "4" if ARCH_LH7A40X
1051 depends on NEED_MULTIPLE_NODES
1054 bool "High Memory Support (EXPERIMENTAL)"
1055 depends on MMU && EXPERIMENTAL
1057 The address space of ARM processors is only 4 Gigabytes large
1058 and it has to accommodate user address space, kernel address
1059 space as well as some memory mapped IO. That means that, if you
1060 have a large amount of physical memory and/or IO, not all of the
1061 memory can be "permanently mapped" by the kernel. The physical
1062 memory that is not permanently mapped is called "high memory".
1064 Depending on the selected kernel/user memory split, minimum
1065 vmalloc space and actual amount of RAM, you may not need this
1066 option which should result in a slightly faster kernel.
1073 bool "Timer and CPU usage LEDs"
1074 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1075 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1076 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1077 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1078 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1079 ARCH_AT91 || ARCH_DAVINCI || \
1080 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1082 If you say Y here, the LEDs on your machine will be used
1083 to provide useful information about your current system status.
1085 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1086 be able to select which LEDs are active using the options below. If
1087 you are compiling a kernel for the EBSA-110 or the LART however, the
1088 red LED will simply flash regularly to indicate that the system is
1089 still functional. It is safe to say Y here if you have a CATS
1090 system, but the driver will do nothing.
1093 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1094 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1095 || MACH_OMAP_PERSEUS2
1097 depends on !GENERIC_CLOCKEVENTS
1098 default y if ARCH_EBSA110
1100 If you say Y here, one of the system LEDs (the green one on the
1101 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1102 will flash regularly to indicate that the system is still
1103 operational. This is mainly useful to kernel hackers who are
1104 debugging unstable kernels.
1106 The LART uses the same LED for both Timer LED and CPU usage LED
1107 functions. You may choose to use both, but the Timer LED function
1108 will overrule the CPU usage LED.
1111 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1113 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1114 || MACH_OMAP_PERSEUS2
1117 If you say Y here, the red LED will be used to give a good real
1118 time indication of CPU usage, by lighting whenever the idle task
1119 is not currently executing.
1121 The LART uses the same LED for both Timer LED and CPU usage LED
1122 functions. You may choose to use both, but the Timer LED function
1123 will overrule the CPU usage LED.
1125 config ALIGNMENT_TRAP
1127 depends on CPU_CP15_MMU
1128 default y if !ARCH_EBSA110
1130 ARM processors cannot fetch/store information which is not
1131 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1132 address divisible by 4. On 32-bit ARM processors, these non-aligned
1133 fetch/store instructions will be emulated in software if you say
1134 here, which has a severe performance impact. This is necessary for
1135 correct operation of some network protocols. With an IP-only
1136 configuration it is safe to say N, otherwise say Y.
1138 config UACCESS_WITH_MEMCPY
1139 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1140 depends on MMU && EXPERIMENTAL
1141 default y if CPU_FEROCEON
1143 Implement faster copy_to_user and clear_user methods for CPU
1144 cores where a 8-word STM instruction give significantly higher
1145 memory write throughput than a sequence of individual 32bit stores.
1147 A possible side effect is a slight increase in scheduling latency
1148 between threads sharing the same address space if they invoke
1149 such copy operations with large buffers.
1151 However, if the CPU data cache is using a write-allocate mode,
1152 this option is unlikely to provide any performance gain.
1158 # Compressed boot loader in ROM. Yes, we really want to ask about
1159 # TEXT and BSS so we preserve their values in the config files.
1160 config ZBOOT_ROM_TEXT
1161 hex "Compressed ROM boot loader base address"
1164 The physical address at which the ROM-able zImage is to be
1165 placed in the target. Platforms which normally make use of
1166 ROM-able zImage formats normally set this to a suitable
1167 value in their defconfig file.
1169 If ZBOOT_ROM is not enabled, this has no effect.
1171 config ZBOOT_ROM_BSS
1172 hex "Compressed ROM boot loader BSS address"
1175 The base address of an area of read/write memory in the target
1176 for the ROM-able zImage which must be available while the
1177 decompressor is running. It must be large enough to hold the
1178 entire decompressed kernel plus an additional 128 KiB.
1179 Platforms which normally make use of ROM-able zImage formats
1180 normally set this to a suitable value in their defconfig file.
1182 If ZBOOT_ROM is not enabled, this has no effect.
1185 bool "Compressed boot loader in ROM/flash"
1186 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1188 Say Y here if you intend to execute your compressed kernel image
1189 (zImage) directly from ROM or flash. If unsure, say N.
1192 string "Default kernel command string"
1195 On some architectures (EBSA110 and CATS), there is currently no way
1196 for the boot loader to pass arguments to the kernel. For these
1197 architectures, you should supply some command-line options at build
1198 time by entering them here. As a minimum, you should specify the
1199 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1202 bool "Kernel Execute-In-Place from ROM"
1203 depends on !ZBOOT_ROM
1205 Execute-In-Place allows the kernel to run from non-volatile storage
1206 directly addressable by the CPU, such as NOR flash. This saves RAM
1207 space since the text section of the kernel is not loaded from flash
1208 to RAM. Read-write sections, such as the data section and stack,
1209 are still copied to RAM. The XIP kernel is not compressed since
1210 it has to run directly from flash, so it will take more space to
1211 store it. The flash address used to link the kernel object files,
1212 and for storing it, is configuration dependent. Therefore, if you
1213 say Y here, you must know the proper physical address where to
1214 store the kernel image depending on your own flash memory usage.
1216 Also note that the make target becomes "make xipImage" rather than
1217 "make zImage" or "make Image". The final kernel binary to put in
1218 ROM memory will be arch/arm/boot/xipImage.
1222 config XIP_PHYS_ADDR
1223 hex "XIP Kernel Physical Location"
1224 depends on XIP_KERNEL
1225 default "0x00080000"
1227 This is the physical address in your flash memory the kernel will
1228 be linked for and stored to. This address is dependent on your
1232 bool "Kexec system call (EXPERIMENTAL)"
1233 depends on EXPERIMENTAL
1235 kexec is a system call that implements the ability to shutdown your
1236 current kernel, and to start another kernel. It is like a reboot
1237 but it is independent of the system firmware. And like a reboot
1238 you can start any kernel with it, not just Linux.
1240 It is an ongoing process to be certain the hardware in a machine
1241 is properly shutdown, so do not be surprised if this code does not
1242 initially work for you. It may help to enable device hotplugging
1246 bool "Export atags in procfs"
1250 Should the atags used to boot the kernel be exported in an "atags"
1251 file in procfs. Useful with kexec.
1255 menu "CPU Power Management"
1259 source "drivers/cpufreq/Kconfig"
1261 config CPU_FREQ_SA1100
1263 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1266 config CPU_FREQ_SA1110
1268 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1271 config CPU_FREQ_INTEGRATOR
1272 tristate "CPUfreq driver for ARM Integrator CPUs"
1273 depends on ARCH_INTEGRATOR && CPU_FREQ
1276 This enables the CPUfreq driver for ARM Integrator CPUs.
1278 For details, take a look at <file:Documentation/cpu-freq>.
1284 depends on CPU_FREQ && ARCH_PXA && PXA25x
1286 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1288 config CPU_FREQ_S3C64XX
1289 bool "CPUfreq support for Samsung S3C64XX CPUs"
1290 depends on CPU_FREQ && CPU_S3C6410
1295 Internal configuration node for common cpufreq on Samsung SoC
1297 config CPU_FREQ_S3C24XX
1298 bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1299 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1302 This enables the CPUfreq driver for the Samsung S3C24XX family
1305 For details, take a look at <file:Documentation/cpu-freq>.
1309 config CPU_FREQ_S3C24XX_PLL
1310 bool "Support CPUfreq changing of PLL frequency"
1311 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1313 Compile in support for changing the PLL frequency from the
1314 S3C24XX series CPUfreq driver. The PLL takes time to settle
1315 after a frequency change, so by default it is not enabled.
1317 This also means that the PLL tables for the selected CPU(s) will
1318 be built which may increase the size of the kernel image.
1320 config CPU_FREQ_S3C24XX_DEBUG
1321 bool "Debug CPUfreq Samsung driver core"
1322 depends on CPU_FREQ_S3C24XX
1324 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1326 config CPU_FREQ_S3C24XX_IODEBUG
1327 bool "Debug CPUfreq Samsung driver IO timing"
1328 depends on CPU_FREQ_S3C24XX
1330 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1332 config CPU_FREQ_S3C24XX_DEBUGFS
1333 bool "Export debugfs for CPUFreq"
1334 depends on CPU_FREQ_S3C24XX && DEBUG_FS
1336 Export status information via debugfs.
1340 source "drivers/cpuidle/Kconfig"
1344 menu "Floating point emulation"
1346 comment "At least one emulation must be selected"
1349 bool "NWFPE math emulation"
1350 depends on !AEABI || OABI_COMPAT
1352 Say Y to include the NWFPE floating point emulator in the kernel.
1353 This is necessary to run most binaries. Linux does not currently
1354 support floating point hardware so you need to say Y here even if
1355 your machine has an FPA or floating point co-processor podule.
1357 You may say N here if you are going to load the Acorn FPEmulator
1358 early in the bootup.
1361 bool "Support extended precision"
1362 depends on FPE_NWFPE
1364 Say Y to include 80-bit support in the kernel floating-point
1365 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1366 Note that gcc does not generate 80-bit operations by default,
1367 so in most cases this option only enlarges the size of the
1368 floating point emulator without any good reason.
1370 You almost surely want to say N here.
1373 bool "FastFPE math emulation (EXPERIMENTAL)"
1374 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1376 Say Y here to include the FAST floating point emulator in the kernel.
1377 This is an experimental much faster emulator which now also has full
1378 precision for the mantissa. It does not support any exceptions.
1379 It is very simple, and approximately 3-6 times faster than NWFPE.
1381 It should be sufficient for most programs. It may be not suitable
1382 for scientific calculations, but you have to check this for yourself.
1383 If you do not feel you need a faster FP emulation you should better
1387 bool "VFP-format floating point maths"
1388 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1390 Say Y to include VFP support code in the kernel. This is needed
1391 if your hardware includes a VFP unit.
1393 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1394 release notes and additional status information.
1396 Say N if your target does not have VFP hardware.
1404 bool "Advanced SIMD (NEON) Extension support"
1405 depends on VFPv3 && CPU_V7
1407 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1412 menu "Userspace binary formats"
1414 source "fs/Kconfig.binfmt"
1417 tristate "RISC OS personality"
1420 Say Y here to include the kernel code necessary if you want to run
1421 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1422 experimental; if this sounds frightening, say N and sleep in peace.
1423 You can also say M here to compile this support as a module (which
1424 will be called arthur).
1428 menu "Power management options"
1430 source "kernel/power/Kconfig"
1432 config ARCH_SUSPEND_POSSIBLE
1437 source "net/Kconfig"
1439 menu "Device Drivers"
1441 source "drivers/base/Kconfig"
1443 source "drivers/connector/Kconfig"
1445 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1446 source "drivers/mtd/Kconfig"
1449 source "drivers/parport/Kconfig"
1451 source "drivers/pnp/Kconfig"
1453 source "drivers/block/Kconfig"
1455 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1457 source "drivers/misc/Kconfig"
1459 source "drivers/ide/Kconfig"
1461 source "drivers/scsi/Kconfig"
1463 source "drivers/ata/Kconfig"
1465 source "drivers/md/Kconfig"
1467 source "drivers/message/fusion/Kconfig"
1469 source "drivers/ieee1394/Kconfig"
1471 source "drivers/message/i2o/Kconfig"
1473 source "drivers/net/Kconfig"
1475 source "drivers/isdn/Kconfig"
1477 # input before char - char/joystick depends on it. As does USB.
1479 source "drivers/input/Kconfig"
1481 source "drivers/char/Kconfig"
1483 source "drivers/i2c/Kconfig"
1485 source "drivers/spi/Kconfig"
1487 source "drivers/gpio/Kconfig"
1489 source "drivers/w1/Kconfig"
1491 source "drivers/power/Kconfig"
1493 source "drivers/hwmon/Kconfig"
1495 source "drivers/thermal/Kconfig"
1497 source "drivers/watchdog/Kconfig"
1499 source "drivers/ssb/Kconfig"
1501 #source "drivers/l3/Kconfig"
1503 source "drivers/mfd/Kconfig"
1505 source "drivers/media/Kconfig"
1507 source "drivers/video/Kconfig"
1509 source "sound/Kconfig"
1511 source "drivers/hid/Kconfig"
1513 source "drivers/usb/Kconfig"
1515 source "drivers/uwb/Kconfig"
1517 source "drivers/mmc/Kconfig"
1519 source "drivers/memstick/Kconfig"
1521 source "drivers/accessibility/Kconfig"
1523 source "drivers/leds/Kconfig"
1525 source "drivers/rtc/Kconfig"
1527 source "drivers/dma/Kconfig"
1529 source "drivers/dca/Kconfig"
1531 source "drivers/auxdisplay/Kconfig"
1533 source "drivers/regulator/Kconfig"
1535 source "drivers/uio/Kconfig"
1537 source "drivers/staging/Kconfig"
1543 source "arch/arm/Kconfig.debug"
1545 source "security/Kconfig"
1547 source "crypto/Kconfig"
1549 source "lib/Kconfig"