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"
578 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
579 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
580 the Samsung SMDK2410 development board (and derivatives).
583 bool "Samsung S3C64XX"
586 select ARCH_HAS_CPUFREQ
588 Samsung S3C64XX series based systems
598 Support for the StrongARM based Digital DNARD machine, also known
599 as "Shark" (<http://www.shark-linux.de/shark.html>).
604 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
605 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
607 Say Y here for systems based on one of the Sharp LH7A40X
608 System on a Chip processors. These CPUs include an ARM922T
609 core with a wide array of integrated devices for
610 hand-held and low-power applications.
613 bool "ST-Ericsson U300 Series"
619 select GENERIC_CLOCKEVENTS
624 Support for ST-Ericsson U300 series mobile platforms.
630 select GENERIC_CLOCKEVENTS
632 select ARCH_REQUIRE_GPIOLIB
637 select GENERIC_ALLOCATOR
639 Support for TI's DaVinci platform.
645 select ARCH_REQUIRE_GPIOLIB
646 select ARCH_HAS_CPUFREQ
648 select GENERIC_CLOCKEVENTS
650 Support for TI's OMAP platform (OMAP1 and OMAP2).
654 source "arch/arm/mach-clps711x/Kconfig"
656 source "arch/arm/mach-ep93xx/Kconfig"
658 source "arch/arm/mach-footbridge/Kconfig"
660 source "arch/arm/mach-gemini/Kconfig"
662 source "arch/arm/mach-integrator/Kconfig"
664 source "arch/arm/mach-iop32x/Kconfig"
666 source "arch/arm/mach-iop33x/Kconfig"
668 source "arch/arm/mach-iop13xx/Kconfig"
670 source "arch/arm/mach-ixp4xx/Kconfig"
672 source "arch/arm/mach-ixp2000/Kconfig"
674 source "arch/arm/mach-ixp23xx/Kconfig"
676 source "arch/arm/mach-loki/Kconfig"
678 source "arch/arm/mach-mv78xx0/Kconfig"
680 source "arch/arm/mach-pxa/Kconfig"
681 source "arch/arm/plat-pxa/Kconfig"
683 source "arch/arm/mach-mmp/Kconfig"
685 source "arch/arm/mach-sa1100/Kconfig"
687 source "arch/arm/plat-omap/Kconfig"
689 source "arch/arm/mach-omap1/Kconfig"
691 source "arch/arm/mach-omap2/Kconfig"
693 source "arch/arm/mach-orion5x/Kconfig"
695 source "arch/arm/mach-kirkwood/Kconfig"
697 source "arch/arm/plat-s3c24xx/Kconfig"
698 source "arch/arm/plat-s3c64xx/Kconfig"
699 source "arch/arm/plat-s3c/Kconfig"
702 source "arch/arm/mach-s3c2400/Kconfig"
703 source "arch/arm/mach-s3c2410/Kconfig"
704 source "arch/arm/mach-s3c2412/Kconfig"
705 source "arch/arm/mach-s3c2440/Kconfig"
706 source "arch/arm/mach-s3c2442/Kconfig"
707 source "arch/arm/mach-s3c2443/Kconfig"
711 source "arch/arm/mach-s3c6400/Kconfig"
712 source "arch/arm/mach-s3c6410/Kconfig"
715 source "arch/arm/plat-stmp3xxx/Kconfig"
717 source "arch/arm/mach-lh7a40x/Kconfig"
719 source "arch/arm/mach-h720x/Kconfig"
721 source "arch/arm/mach-versatile/Kconfig"
723 source "arch/arm/mach-aaec2000/Kconfig"
725 source "arch/arm/mach-realview/Kconfig"
727 source "arch/arm/mach-at91/Kconfig"
729 source "arch/arm/plat-mxc/Kconfig"
731 source "arch/arm/mach-netx/Kconfig"
733 source "arch/arm/mach-ns9xxx/Kconfig"
735 source "arch/arm/mach-davinci/Kconfig"
737 source "arch/arm/mach-ks8695/Kconfig"
739 source "arch/arm/mach-msm/Kconfig"
741 source "arch/arm/mach-u300/Kconfig"
743 source "arch/arm/mach-w90x900/Kconfig"
745 # Definitions to make life easier
758 source arch/arm/mm/Kconfig
761 bool "Enable iWMMXt support"
762 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
763 default y if PXA27x || PXA3xx || ARCH_MMP
765 Enable support for iWMMXt context switching at run time if
766 running on a CPU that supports it.
768 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
771 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
775 source "arch/arm/Kconfig-nommu"
778 config ARM_ERRATA_411920
779 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
780 depends on CPU_V6 && !SMP
782 Invalidation of the Instruction Cache operation can
783 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
784 It does not affect the MPCore. This option enables the ARM Ltd.
785 recommended workaround.
787 config ARM_ERRATA_430973
788 bool "ARM errata: Stale prediction on replaced interworking branch"
791 This option enables the workaround for the 430973 Cortex-A8
792 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
793 interworking branch is replaced with another code sequence at the
794 same virtual address, whether due to self-modifying code or virtual
795 to physical address re-mapping, Cortex-A8 does not recover from the
796 stale interworking branch prediction. This results in Cortex-A8
797 executing the new code sequence in the incorrect ARM or Thumb state.
798 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
799 and also flushes the branch target cache at every context switch.
800 Note that setting specific bits in the ACTLR register may not be
801 available in non-secure mode.
803 config ARM_ERRATA_458693
804 bool "ARM errata: Processor deadlock when a false hazard is created"
807 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
808 erratum. For very specific sequences of memory operations, it is
809 possible for a hazard condition intended for a cache line to instead
810 be incorrectly associated with a different cache line. This false
811 hazard might then cause a processor deadlock. The workaround enables
812 the L1 caching of the NEON accesses and disables the PLD instruction
813 in the ACTLR register. Note that setting specific bits in the ACTLR
814 register may not be available in non-secure mode.
816 config ARM_ERRATA_460075
817 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
820 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
821 erratum. Any asynchronous access to the L2 cache may encounter a
822 situation in which recent store transactions to the L2 cache are lost
823 and overwritten with stale memory contents from external memory. The
824 workaround disables the write-allocate mode for the L2 cache via the
825 ACTLR register. Note that setting specific bits in the ACTLR register
826 may not be available in non-secure mode.
830 source "arch/arm/common/Kconfig"
832 config FORCE_MAX_ZONEORDER
845 Find out whether you have ISA slots on your motherboard. ISA is the
846 name of a bus system, i.e. the way the CPU talks to the other stuff
847 inside your box. Other bus systems are PCI, EISA, MicroChannel
848 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
849 newer boards don't support it. If you have ISA, say Y, otherwise N.
851 # Select ISA DMA controller support
856 # Select ISA DMA interface
861 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
863 Find out whether you have a PCI motherboard. PCI is the name of a
864 bus system, i.e. the way the CPU talks to the other stuff inside
865 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
866 VESA. If you have PCI, say Y, otherwise N.
871 # Select the host bridge type
872 config PCI_HOST_VIA82C505
874 depends on PCI && ARCH_SHARK
877 config PCI_HOST_ITE8152
879 depends on PCI && MACH_ARMCORE
883 source "drivers/pci/Kconfig"
885 source "drivers/pcmcia/Kconfig"
889 menu "Kernel Features"
891 source "kernel/time/Kconfig"
894 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
895 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
896 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
897 depends on GENERIC_CLOCKEVENTS
898 select USE_GENERIC_SMP_HELPERS
899 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4)
901 This enables support for systems with more than one CPU. If you have
902 a system with only one CPU, like most personal computers, say N. If
903 you have a system with more than one CPU, say Y.
905 If you say N here, the kernel will run on single and multiprocessor
906 machines, but will use only one CPU of a multiprocessor machine. If
907 you say Y here, the kernel will run on many, but not all, single
908 processor machines. On a single processor machine, the kernel will
909 run faster if you say N here.
911 See also <file:Documentation/i386/IO-APIC.txt>,
912 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
913 <http://www.linuxdoc.org/docs.html#howto>.
915 If you don't know what to do here, say N.
921 This option enables support for the ARM system coherency unit
927 This options enables support for the ARM timer and watchdog unit
930 prompt "Memory split"
933 Select the desired split between kernel and user memory.
935 If you are not absolutely sure what you are doing, leave this
939 bool "3G/1G user/kernel split"
941 bool "2G/2G user/kernel split"
943 bool "1G/3G user/kernel split"
948 default 0x40000000 if VMSPLIT_1G
949 default 0x80000000 if VMSPLIT_2G
953 int "Maximum number of CPUs (2-32)"
959 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
960 depends on SMP && HOTPLUG && EXPERIMENTAL
962 Say Y here to experiment with turning CPUs off and on. CPUs
963 can be controlled through /sys/devices/system/cpu.
966 bool "Use local timer interrupts"
967 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
968 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
970 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4)
972 Enable support for local timers on SMP platforms, rather then the
973 legacy IPI broadcast method. Local timers allows the system
974 accounting to be spread across the timer interval, preventing a
975 "thundering herd" at every timer tick.
978 bool "Preemptible Kernel (EXPERIMENTAL)"
979 depends on EXPERIMENTAL
981 This option reduces the latency of the kernel when reacting to
982 real-time or interactive events by allowing a low priority process to
983 be preempted even if it is in kernel mode executing a system call.
984 This allows applications to run more reliably even when the system is
987 Say Y here if you are building a kernel for a desktop, embedded
988 or real-time system. Say N if you are unsure.
992 default 128 if ARCH_L7200
993 default 200 if ARCH_EBSA110 || ARCH_S3C2410
994 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
995 default AT91_TIMER_HZ if ARCH_AT91
999 bool "Use the ARM EABI to compile the kernel"
1001 This option allows for the kernel to be compiled using the latest
1002 ARM ABI (aka EABI). This is only useful if you are using a user
1003 space environment that is also compiled with EABI.
1005 Since there are major incompatibilities between the legacy ABI and
1006 EABI, especially with regard to structure member alignment, this
1007 option also changes the kernel syscall calling convention to
1008 disambiguate both ABIs and allow for backward compatibility support
1009 (selected with CONFIG_OABI_COMPAT).
1011 To use this you need GCC version 4.0.0 or later.
1014 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1015 depends on AEABI && EXPERIMENTAL
1018 This option preserves the old syscall interface along with the
1019 new (ARM EABI) one. It also provides a compatibility layer to
1020 intercept syscalls that have structure arguments which layout
1021 in memory differs between the legacy ABI and the new ARM EABI
1022 (only for non "thumb" binaries). This option adds a tiny
1023 overhead to all syscalls and produces a slightly larger kernel.
1024 If you know you'll be using only pure EABI user space then you
1025 can say N here. If this option is not selected and you attempt
1026 to execute a legacy ABI binary then the result will be
1027 UNPREDICTABLE (in fact it can be predicted that it won't work
1028 at all). If in doubt say Y.
1030 config ARCH_HAS_HOLES_MEMORYMODEL
1033 # Discontigmem is deprecated
1034 config ARCH_DISCONTIGMEM_ENABLE
1037 config ARCH_SPARSEMEM_ENABLE
1040 config ARCH_SPARSEMEM_DEFAULT
1041 def_bool ARCH_SPARSEMEM_ENABLE
1043 config ARCH_SELECT_MEMORY_MODEL
1044 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1048 default "4" if ARCH_LH7A40X
1050 depends on NEED_MULTIPLE_NODES
1053 bool "High Memory Support (EXPERIMENTAL)"
1054 depends on MMU && EXPERIMENTAL
1056 The address space of ARM processors is only 4 Gigabytes large
1057 and it has to accommodate user address space, kernel address
1058 space as well as some memory mapped IO. That means that, if you
1059 have a large amount of physical memory and/or IO, not all of the
1060 memory can be "permanently mapped" by the kernel. The physical
1061 memory that is not permanently mapped is called "high memory".
1063 Depending on the selected kernel/user memory split, minimum
1064 vmalloc space and actual amount of RAM, you may not need this
1065 option which should result in a slightly faster kernel.
1072 bool "Timer and CPU usage LEDs"
1073 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1074 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1075 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1076 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1077 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1078 ARCH_AT91 || ARCH_DAVINCI || \
1079 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1081 If you say Y here, the LEDs on your machine will be used
1082 to provide useful information about your current system status.
1084 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1085 be able to select which LEDs are active using the options below. If
1086 you are compiling a kernel for the EBSA-110 or the LART however, the
1087 red LED will simply flash regularly to indicate that the system is
1088 still functional. It is safe to say Y here if you have a CATS
1089 system, but the driver will do nothing.
1092 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1093 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1094 || MACH_OMAP_PERSEUS2
1096 depends on !GENERIC_CLOCKEVENTS
1097 default y if ARCH_EBSA110
1099 If you say Y here, one of the system LEDs (the green one on the
1100 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1101 will flash regularly to indicate that the system is still
1102 operational. This is mainly useful to kernel hackers who are
1103 debugging unstable kernels.
1105 The LART uses the same LED for both Timer LED and CPU usage LED
1106 functions. You may choose to use both, but the Timer LED function
1107 will overrule the CPU usage LED.
1110 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1112 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1113 || MACH_OMAP_PERSEUS2
1116 If you say Y here, the red LED will be used to give a good real
1117 time indication of CPU usage, by lighting whenever the idle task
1118 is not currently executing.
1120 The LART uses the same LED for both Timer LED and CPU usage LED
1121 functions. You may choose to use both, but the Timer LED function
1122 will overrule the CPU usage LED.
1124 config ALIGNMENT_TRAP
1126 depends on CPU_CP15_MMU
1127 default y if !ARCH_EBSA110
1129 ARM processors cannot fetch/store information which is not
1130 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1131 address divisible by 4. On 32-bit ARM processors, these non-aligned
1132 fetch/store instructions will be emulated in software if you say
1133 here, which has a severe performance impact. This is necessary for
1134 correct operation of some network protocols. With an IP-only
1135 configuration it is safe to say N, otherwise say Y.
1137 config UACCESS_WITH_MEMCPY
1138 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1139 depends on MMU && EXPERIMENTAL
1140 default y if CPU_FEROCEON
1142 Implement faster copy_to_user and clear_user methods for CPU
1143 cores where a 8-word STM instruction give significantly higher
1144 memory write throughput than a sequence of individual 32bit stores.
1146 A possible side effect is a slight increase in scheduling latency
1147 between threads sharing the same address space if they invoke
1148 such copy operations with large buffers.
1150 However, if the CPU data cache is using a write-allocate mode,
1151 this option is unlikely to provide any performance gain.
1157 # Compressed boot loader in ROM. Yes, we really want to ask about
1158 # TEXT and BSS so we preserve their values in the config files.
1159 config ZBOOT_ROM_TEXT
1160 hex "Compressed ROM boot loader base address"
1163 The physical address at which the ROM-able zImage is to be
1164 placed in the target. Platforms which normally make use of
1165 ROM-able zImage formats normally set this to a suitable
1166 value in their defconfig file.
1168 If ZBOOT_ROM is not enabled, this has no effect.
1170 config ZBOOT_ROM_BSS
1171 hex "Compressed ROM boot loader BSS address"
1174 The base address of an area of read/write memory in the target
1175 for the ROM-able zImage which must be available while the
1176 decompressor is running. It must be large enough to hold the
1177 entire decompressed kernel plus an additional 128 KiB.
1178 Platforms which normally make use of ROM-able zImage formats
1179 normally set this to a suitable value in their defconfig file.
1181 If ZBOOT_ROM is not enabled, this has no effect.
1184 bool "Compressed boot loader in ROM/flash"
1185 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1187 Say Y here if you intend to execute your compressed kernel image
1188 (zImage) directly from ROM or flash. If unsure, say N.
1191 string "Default kernel command string"
1194 On some architectures (EBSA110 and CATS), there is currently no way
1195 for the boot loader to pass arguments to the kernel. For these
1196 architectures, you should supply some command-line options at build
1197 time by entering them here. As a minimum, you should specify the
1198 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1201 bool "Kernel Execute-In-Place from ROM"
1202 depends on !ZBOOT_ROM
1204 Execute-In-Place allows the kernel to run from non-volatile storage
1205 directly addressable by the CPU, such as NOR flash. This saves RAM
1206 space since the text section of the kernel is not loaded from flash
1207 to RAM. Read-write sections, such as the data section and stack,
1208 are still copied to RAM. The XIP kernel is not compressed since
1209 it has to run directly from flash, so it will take more space to
1210 store it. The flash address used to link the kernel object files,
1211 and for storing it, is configuration dependent. Therefore, if you
1212 say Y here, you must know the proper physical address where to
1213 store the kernel image depending on your own flash memory usage.
1215 Also note that the make target becomes "make xipImage" rather than
1216 "make zImage" or "make Image". The final kernel binary to put in
1217 ROM memory will be arch/arm/boot/xipImage.
1221 config XIP_PHYS_ADDR
1222 hex "XIP Kernel Physical Location"
1223 depends on XIP_KERNEL
1224 default "0x00080000"
1226 This is the physical address in your flash memory the kernel will
1227 be linked for and stored to. This address is dependent on your
1231 bool "Kexec system call (EXPERIMENTAL)"
1232 depends on EXPERIMENTAL
1234 kexec is a system call that implements the ability to shutdown your
1235 current kernel, and to start another kernel. It is like a reboot
1236 but it is independent of the system firmware. And like a reboot
1237 you can start any kernel with it, not just Linux.
1239 It is an ongoing process to be certain the hardware in a machine
1240 is properly shutdown, so do not be surprised if this code does not
1241 initially work for you. It may help to enable device hotplugging
1245 bool "Export atags in procfs"
1249 Should the atags used to boot the kernel be exported in an "atags"
1250 file in procfs. Useful with kexec.
1254 menu "CPU Power Management"
1258 source "drivers/cpufreq/Kconfig"
1260 config CPU_FREQ_SA1100
1262 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1265 config CPU_FREQ_SA1110
1267 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1270 config CPU_FREQ_INTEGRATOR
1271 tristate "CPUfreq driver for ARM Integrator CPUs"
1272 depends on ARCH_INTEGRATOR && CPU_FREQ
1275 This enables the CPUfreq driver for ARM Integrator CPUs.
1277 For details, take a look at <file:Documentation/cpu-freq>.
1283 depends on CPU_FREQ && ARCH_PXA && PXA25x
1285 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1287 config CPU_FREQ_S3C64XX
1288 bool "CPUfreq support for Samsung S3C64XX CPUs"
1289 depends on CPU_FREQ && CPU_S3C6410
1293 source "drivers/cpuidle/Kconfig"
1297 menu "Floating point emulation"
1299 comment "At least one emulation must be selected"
1302 bool "NWFPE math emulation"
1303 depends on !AEABI || OABI_COMPAT
1305 Say Y to include the NWFPE floating point emulator in the kernel.
1306 This is necessary to run most binaries. Linux does not currently
1307 support floating point hardware so you need to say Y here even if
1308 your machine has an FPA or floating point co-processor podule.
1310 You may say N here if you are going to load the Acorn FPEmulator
1311 early in the bootup.
1314 bool "Support extended precision"
1315 depends on FPE_NWFPE
1317 Say Y to include 80-bit support in the kernel floating-point
1318 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1319 Note that gcc does not generate 80-bit operations by default,
1320 so in most cases this option only enlarges the size of the
1321 floating point emulator without any good reason.
1323 You almost surely want to say N here.
1326 bool "FastFPE math emulation (EXPERIMENTAL)"
1327 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1329 Say Y here to include the FAST floating point emulator in the kernel.
1330 This is an experimental much faster emulator which now also has full
1331 precision for the mantissa. It does not support any exceptions.
1332 It is very simple, and approximately 3-6 times faster than NWFPE.
1334 It should be sufficient for most programs. It may be not suitable
1335 for scientific calculations, but you have to check this for yourself.
1336 If you do not feel you need a faster FP emulation you should better
1340 bool "VFP-format floating point maths"
1341 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1343 Say Y to include VFP support code in the kernel. This is needed
1344 if your hardware includes a VFP unit.
1346 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1347 release notes and additional status information.
1349 Say N if your target does not have VFP hardware.
1357 bool "Advanced SIMD (NEON) Extension support"
1358 depends on VFPv3 && CPU_V7
1360 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1365 menu "Userspace binary formats"
1367 source "fs/Kconfig.binfmt"
1370 tristate "RISC OS personality"
1373 Say Y here to include the kernel code necessary if you want to run
1374 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1375 experimental; if this sounds frightening, say N and sleep in peace.
1376 You can also say M here to compile this support as a module (which
1377 will be called arthur).
1381 menu "Power management options"
1383 source "kernel/power/Kconfig"
1385 config ARCH_SUSPEND_POSSIBLE
1390 source "net/Kconfig"
1392 menu "Device Drivers"
1394 source "drivers/base/Kconfig"
1396 source "drivers/connector/Kconfig"
1398 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1399 source "drivers/mtd/Kconfig"
1402 source "drivers/parport/Kconfig"
1404 source "drivers/pnp/Kconfig"
1406 source "drivers/block/Kconfig"
1408 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1410 source "drivers/misc/Kconfig"
1412 source "drivers/ide/Kconfig"
1414 source "drivers/scsi/Kconfig"
1416 source "drivers/ata/Kconfig"
1418 source "drivers/md/Kconfig"
1420 source "drivers/message/fusion/Kconfig"
1422 source "drivers/ieee1394/Kconfig"
1424 source "drivers/message/i2o/Kconfig"
1426 source "drivers/net/Kconfig"
1428 source "drivers/isdn/Kconfig"
1430 # input before char - char/joystick depends on it. As does USB.
1432 source "drivers/input/Kconfig"
1434 source "drivers/char/Kconfig"
1436 source "drivers/i2c/Kconfig"
1438 source "drivers/spi/Kconfig"
1440 source "drivers/gpio/Kconfig"
1442 source "drivers/w1/Kconfig"
1444 source "drivers/power/Kconfig"
1446 source "drivers/hwmon/Kconfig"
1448 source "drivers/thermal/Kconfig"
1450 source "drivers/watchdog/Kconfig"
1452 source "drivers/ssb/Kconfig"
1454 #source "drivers/l3/Kconfig"
1456 source "drivers/mfd/Kconfig"
1458 source "drivers/media/Kconfig"
1460 source "drivers/video/Kconfig"
1462 source "sound/Kconfig"
1464 source "drivers/hid/Kconfig"
1466 source "drivers/usb/Kconfig"
1468 source "drivers/uwb/Kconfig"
1470 source "drivers/mmc/Kconfig"
1472 source "drivers/memstick/Kconfig"
1474 source "drivers/accessibility/Kconfig"
1476 source "drivers/leds/Kconfig"
1478 source "drivers/rtc/Kconfig"
1480 source "drivers/dma/Kconfig"
1482 source "drivers/dca/Kconfig"
1484 source "drivers/auxdisplay/Kconfig"
1486 source "drivers/regulator/Kconfig"
1488 source "drivers/uio/Kconfig"
1490 source "drivers/staging/Kconfig"
1496 source "arch/arm/Kconfig.debug"
1498 source "security/Kconfig"
1500 source "crypto/Kconfig"
1502 source "lib/Kconfig"