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
43 config GENERIC_CLOCKEVENTS
47 config GENERIC_CLOCKEVENTS_BROADCAST
49 depends on GENERIC_CLOCKEVENTS
50 default y if SMP && !LOCAL_TIMERS
63 The Extended Industry Standard Architecture (EISA) bus was
64 developed as an open alternative to the IBM MicroChannel bus.
66 The EISA bus provided some of the features of the IBM MicroChannel
67 bus while maintaining backward compatibility with cards made for
68 the older ISA bus. The EISA bus saw limited use between 1988 and
69 1995 when it was made obsolete by the PCI bus.
71 Say Y here if you are building a kernel for an EISA-based machine.
81 MicroChannel Architecture is found in some IBM PS/2 machines and
82 laptops. It is a bus system similar to PCI or ISA. See
83 <file:Documentation/mca.txt> (and especially the web page given
84 there) before attempting to build an MCA bus kernel.
86 config GENERIC_HARDIRQS
90 config STACKTRACE_SUPPORT
94 config HAVE_LATENCYTOP_SUPPORT
99 config LOCKDEP_SUPPORT
103 config TRACE_IRQFLAGS_SUPPORT
107 config HARDIRQS_SW_RESEND
111 config GENERIC_IRQ_PROBE
115 config GENERIC_LOCKBREAK
118 depends on SMP && PREEMPT
120 config RWSEM_GENERIC_SPINLOCK
124 config RWSEM_XCHGADD_ALGORITHM
127 config ARCH_HAS_ILOG2_U32
131 config ARCH_HAS_ILOG2_U64
135 config GENERIC_HWEIGHT
139 config GENERIC_CALIBRATE_DELAY
143 config ARCH_MAY_HAVE_PC_FDC
149 config GENERIC_ISA_DMA
158 config GENERIC_HARDIRQS_NO__DO_IRQ
163 config OPROFILE_ARMV6
165 depends on CPU_V6 && !SMP
166 select OPROFILE_ARM11_CORE
168 config OPROFILE_MPCORE
170 depends on CPU_V6 && SMP
171 select OPROFILE_ARM11_CORE
173 config OPROFILE_ARM11_CORE
176 config OPROFILE_ARMV7
178 depends on CPU_V7 && !SMP
185 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
186 default DRAM_BASE if REMAP_VECTORS_TO_RAM
189 The base address of exception vectors.
191 source "init/Kconfig"
193 source "kernel/Kconfig.freezer"
198 prompt "ARM system type"
199 default ARCH_VERSATILE
202 bool "Agilent AAEC-2000 based"
207 This enables support for systems based on the Agilent AAEC-2000
209 config ARCH_INTEGRATOR
210 bool "ARM Ltd. Integrator family"
216 Support for ARM's Integrator platform.
219 bool "ARM Ltd. RealView family"
225 select GENERIC_CLOCKEVENTS
227 This enables support for ARM Ltd RealView boards.
229 config ARCH_VERSATILE
230 bool "ARM Ltd. Versatile family"
237 select GENERIC_CLOCKEVENTS
239 This enables support for ARM Ltd Versatile board.
244 select ARCH_REQUIRE_GPIOLIB
247 This enables support for systems based on the Atmel AT91RM9200,
248 AT91SAM9 and AT91CAP9 processors.
251 bool "Cirrus Logic CLPS711x/EP721x-based"
254 Support for Cirrus Logic 711x/721x based boards.
262 This is an evaluation board for the StrongARM processor available
263 from Digital. It has limited hardware on-board, including an
264 Ethernet interface, two PCMCIA sockets, two serial ports and a
275 select ARCH_REQUIRE_GPIOLIB
276 select ARCH_HAS_HOLES_MEMORYMODEL
278 This enables support for the Cirrus EP93xx series of CPUs.
281 bool "Cortina Systems Gemini"
284 select ARCH_REQUIRE_GPIOLIB
286 Support for the Cortina Systems Gemini family SoCs
288 config ARCH_FOOTBRIDGE
293 Support for systems based on the DC21285 companion chip
294 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
297 bool "Hilscher NetX based"
300 select GENERIC_CLOCKEVENTS
303 This enables support for systems based on the Hilscher NetX Soc
306 bool "Hynix HMS720x-based"
310 This enables support for systems based on the Hynix HMS720x
317 select GENERIC_CLOCKEVENTS
319 Support for Motorola's i.MX family of processors (MX1, MXL).
327 select ARCH_SUPPORTS_MSI
330 Support for Intel's IOP13XX (XScale) family of processors.
339 select ARCH_REQUIRE_GPIOLIB
341 Support for Intel's 80219 and IOP32X (XScale) family of
351 select ARCH_REQUIRE_GPIOLIB
353 Support for Intel's IOP33X (XScale) family of processors.
361 Support for Intel's IXP23xx (XScale) family of processors.
364 bool "IXP2400/2800-based"
369 Support for Intel's IXP2400/2800 (XScale) family of processors.
377 select GENERIC_CLOCKEVENTS
378 select DMABOUNCE if PCI
380 Support for Intel's IXP4XX (XScale) family of processors.
387 Say Y here if you intend to run this kernel on a LinkUp Systems
388 L7200 Software Development Board which uses an ARM720T processor.
389 Information on this board can be obtained at:
391 <http://www.linkupsys.com/>
393 If you have any questions or comments about the Linux kernel port
394 to this board, send e-mail to <sjhill@cotw.com>.
397 bool "Marvell Kirkwood"
402 select GENERIC_CLOCKEVENTS
405 Support for the following Marvell Kirkwood series SoCs:
406 88F6180, 88F6192 and 88F6281.
409 bool "Micrel/Kendin KS8695"
412 select ARCH_REQUIRE_GPIOLIB
414 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
415 System-on-Chip devices.
418 bool "NetSilicon NS9xxx"
422 select GENERIC_CLOCKEVENTS
425 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
428 <http://www.digi.com/products/microprocessors/index.jsp>
431 bool "Marvell Loki (88RC8480)"
434 select GENERIC_CLOCKEVENTS
437 Support for the Marvell Loki (88RC8480) SoC.
440 bool "Marvell MV78xx0"
445 select GENERIC_CLOCKEVENTS
448 Support for the following Marvell MV78xx0 series SoCs:
452 bool "Freescale MXC/iMX-based"
454 select GENERIC_CLOCKEVENTS
457 select ARCH_REQUIRE_GPIOLIB
460 Support for Freescale MXC/iMX-based family of processors
469 select GENERIC_CLOCKEVENTS
472 Support for the following Marvell Orion 5x series SoCs:
473 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
474 Orion-2 (5281), Orion-1-90 (6183).
477 bool "Philips Nexperia PNX4008 Mobile"
481 This enables support for Philips PNX4008 mobile platform.
484 bool "PXA2xx/PXA3xx-based"
490 select ARCH_REQUIRE_GPIOLIB
492 select GENERIC_CLOCKEVENTS
496 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
499 bool "Marvell PXA168/910"
502 select ARCH_REQUIRE_GPIOLIB
506 select GENERIC_CLOCKEVENTS
510 Support for Marvell's PXA168/910 processor line.
517 select ARCH_MAY_HAVE_PC_FDC
518 select HAVE_PATA_PLATFORM
521 select ARCH_SPARSEMEM_ENABLE
523 On the Acorn Risc-PC, Linux can support the internal IDE disk and
524 CD-ROM interface, serial and parallel port, and the floppy drive.
530 select ARCH_SPARSEMEM_ENABLE
534 select GENERIC_CLOCKEVENTS
537 select ARCH_REQUIRE_GPIOLIB
539 Support for StrongARM 11x0 based boards.
542 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
546 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
547 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
548 the Samsung SMDK2410 development board (and derivatives).
551 bool "Samsung S3C64XX"
555 Samsung S3C64XX series based systems
565 Support for the StrongARM based Digital DNARD machine, also known
566 as "Shark" (<http://www.shark-linux.de/shark.html>).
571 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
572 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
574 Say Y here for systems based on one of the Sharp LH7A40X
575 System on a Chip processors. These CPUs include an ARM922T
576 core with a wide array of integrated devices for
577 hand-held and low-power applications.
583 select GENERIC_CLOCKEVENTS
585 select ARCH_REQUIRE_GPIOLIB
590 select GENERIC_ALLOCATOR
592 Support for TI's DaVinci platform.
598 select ARCH_REQUIRE_GPIOLIB
600 select GENERIC_CLOCKEVENTS
602 Support for TI's OMAP platform (OMAP1 and OMAP2).
608 select GENERIC_CLOCKEVENTS
610 Support for Qualcomm MSM7K based systems. This runs on the ARM11
611 apps processor of the MSM7K and depends on a shared memory
612 interface to the ARM9 modem processor which runs the baseband stack
613 and controls some vital subsystems (clock and power control, etc).
616 bool "Nuvoton W90X900 CPU"
619 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
620 can login www.mcuos.com or www.nuvoton.com to know more.
624 source "arch/arm/mach-clps711x/Kconfig"
626 source "arch/arm/mach-ep93xx/Kconfig"
628 source "arch/arm/mach-footbridge/Kconfig"
630 source "arch/arm/mach-gemini/Kconfig"
632 source "arch/arm/mach-integrator/Kconfig"
634 source "arch/arm/mach-iop32x/Kconfig"
636 source "arch/arm/mach-iop33x/Kconfig"
638 source "arch/arm/mach-iop13xx/Kconfig"
640 source "arch/arm/mach-ixp4xx/Kconfig"
642 source "arch/arm/mach-ixp2000/Kconfig"
644 source "arch/arm/mach-ixp23xx/Kconfig"
646 source "arch/arm/mach-loki/Kconfig"
648 source "arch/arm/mach-mv78xx0/Kconfig"
650 source "arch/arm/mach-pxa/Kconfig"
651 source "arch/arm/plat-pxa/Kconfig"
653 source "arch/arm/mach-mmp/Kconfig"
655 source "arch/arm/mach-sa1100/Kconfig"
657 source "arch/arm/plat-omap/Kconfig"
659 source "arch/arm/mach-omap1/Kconfig"
661 source "arch/arm/mach-omap2/Kconfig"
663 source "arch/arm/mach-orion5x/Kconfig"
665 source "arch/arm/mach-kirkwood/Kconfig"
667 source "arch/arm/plat-s3c24xx/Kconfig"
668 source "arch/arm/plat-s3c64xx/Kconfig"
669 source "arch/arm/plat-s3c/Kconfig"
672 source "arch/arm/mach-s3c2400/Kconfig"
673 source "arch/arm/mach-s3c2410/Kconfig"
674 source "arch/arm/mach-s3c2412/Kconfig"
675 source "arch/arm/mach-s3c2440/Kconfig"
676 source "arch/arm/mach-s3c2442/Kconfig"
677 source "arch/arm/mach-s3c2443/Kconfig"
681 source "arch/arm/mach-s3c6400/Kconfig"
682 source "arch/arm/mach-s3c6410/Kconfig"
685 source "arch/arm/mach-lh7a40x/Kconfig"
687 source "arch/arm/mach-imx/Kconfig"
689 source "arch/arm/mach-h720x/Kconfig"
691 source "arch/arm/mach-versatile/Kconfig"
693 source "arch/arm/mach-aaec2000/Kconfig"
695 source "arch/arm/mach-realview/Kconfig"
697 source "arch/arm/mach-at91/Kconfig"
699 source "arch/arm/plat-mxc/Kconfig"
701 source "arch/arm/mach-netx/Kconfig"
703 source "arch/arm/mach-ns9xxx/Kconfig"
705 source "arch/arm/mach-davinci/Kconfig"
707 source "arch/arm/mach-ks8695/Kconfig"
709 source "arch/arm/mach-msm/Kconfig"
711 source "arch/arm/mach-w90x900/Kconfig"
713 # Definitions to make life easier
726 source arch/arm/mm/Kconfig
729 bool "Enable iWMMXt support"
730 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
731 default y if PXA27x || PXA3xx || ARCH_MMP
733 Enable support for iWMMXt context switching at run time if
734 running on a CPU that supports it.
736 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
739 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
743 source "arch/arm/Kconfig-nommu"
746 config ARM_ERRATA_411920
747 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
748 depends on CPU_V6 && !SMP
750 Invalidation of the Instruction Cache operation can
751 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
752 It does not affect the MPCore. This option enables the ARM Ltd.
753 recommended workaround.
755 config ARM_ERRATA_430973
756 bool "ARM errata: Stale prediction on replaced interworking branch"
759 This option enables the workaround for the 430973 Cortex-A8
760 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
761 interworking branch is replaced with another code sequence at the
762 same virtual address, whether due to self-modifying code or virtual
763 to physical address re-mapping, Cortex-A8 does not recover from the
764 stale interworking branch prediction. This results in Cortex-A8
765 executing the new code sequence in the incorrect ARM or Thumb state.
766 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
767 and also flushes the branch target cache at every context switch.
768 Note that setting specific bits in the ACTLR register may not be
769 available in non-secure mode.
771 config ARM_ERRATA_458693
772 bool "ARM errata: Processor deadlock when a false hazard is created"
775 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
776 erratum. For very specific sequences of memory operations, it is
777 possible for a hazard condition intended for a cache line to instead
778 be incorrectly associated with a different cache line. This false
779 hazard might then cause a processor deadlock. The workaround enables
780 the L1 caching of the NEON accesses and disables the PLD instruction
781 in the ACTLR register. Note that setting specific bits in the ACTLR
782 register may not be available in non-secure mode.
784 config ARM_ERRATA_460075
785 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
788 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
789 erratum. Any asynchronous access to the L2 cache may encounter a
790 situation in which recent store transactions to the L2 cache are lost
791 and overwritten with stale memory contents from external memory. The
792 workaround disables the write-allocate mode for the L2 cache via the
793 ACTLR register. Note that setting specific bits in the ACTLR register
794 may not be available in non-secure mode.
798 source "arch/arm/common/Kconfig"
800 config FORCE_MAX_ZONEORDER
813 Find out whether you have ISA slots on your motherboard. ISA is the
814 name of a bus system, i.e. the way the CPU talks to the other stuff
815 inside your box. Other bus systems are PCI, EISA, MicroChannel
816 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
817 newer boards don't support it. If you have ISA, say Y, otherwise N.
819 # Select ISA DMA controller support
824 # Select ISA DMA interface
829 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
831 Find out whether you have a PCI motherboard. PCI is the name of a
832 bus system, i.e. the way the CPU talks to the other stuff inside
833 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
834 VESA. If you have PCI, say Y, otherwise N.
839 # Select the host bridge type
840 config PCI_HOST_VIA82C505
842 depends on PCI && ARCH_SHARK
845 config PCI_HOST_ITE8152
847 depends on PCI && MACH_ARMCORE
851 source "drivers/pci/Kconfig"
853 source "drivers/pcmcia/Kconfig"
857 menu "Kernel Features"
859 source "kernel/time/Kconfig"
862 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
863 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
864 select USE_GENERIC_SMP_HELPERS
866 This enables support for systems with more than one CPU. If you have
867 a system with only one CPU, like most personal computers, say N. If
868 you have a system with more than one CPU, say Y.
870 If you say N here, the kernel will run on single and multiprocessor
871 machines, but will use only one CPU of a multiprocessor machine. If
872 you say Y here, the kernel will run on many, but not all, single
873 processor machines. On a single processor machine, the kernel will
874 run faster if you say N here.
876 See also <file:Documentation/i386/IO-APIC.txt>,
877 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
878 <http://www.linuxdoc.org/docs.html#howto>.
880 If you don't know what to do here, say N.
883 prompt "Memory split"
886 Select the desired split between kernel and user memory.
888 If you are not absolutely sure what you are doing, leave this
892 bool "3G/1G user/kernel split"
894 bool "2G/2G user/kernel split"
896 bool "1G/3G user/kernel split"
901 default 0x40000000 if VMSPLIT_1G
902 default 0x80000000 if VMSPLIT_2G
906 int "Maximum number of CPUs (2-32)"
912 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
913 depends on SMP && HOTPLUG && EXPERIMENTAL
915 Say Y here to experiment with turning CPUs off and on. CPUs
916 can be controlled through /sys/devices/system/cpu.
919 bool "Use local timer interrupts"
920 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
923 Enable support for local timers on SMP platforms, rather then the
924 legacy IPI broadcast method. Local timers allows the system
925 accounting to be spread across the timer interval, preventing a
926 "thundering herd" at every timer tick.
929 bool "Preemptible Kernel (EXPERIMENTAL)"
930 depends on EXPERIMENTAL
932 This option reduces the latency of the kernel when reacting to
933 real-time or interactive events by allowing a low priority process to
934 be preempted even if it is in kernel mode executing a system call.
935 This allows applications to run more reliably even when the system is
938 Say Y here if you are building a kernel for a desktop, embedded
939 or real-time system. Say N if you are unsure.
943 default 128 if ARCH_L7200
944 default 200 if ARCH_EBSA110 || ARCH_S3C2410
945 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
946 default AT91_TIMER_HZ if ARCH_AT91
950 bool "Use the ARM EABI to compile the kernel"
952 This option allows for the kernel to be compiled using the latest
953 ARM ABI (aka EABI). This is only useful if you are using a user
954 space environment that is also compiled with EABI.
956 Since there are major incompatibilities between the legacy ABI and
957 EABI, especially with regard to structure member alignment, this
958 option also changes the kernel syscall calling convention to
959 disambiguate both ABIs and allow for backward compatibility support
960 (selected with CONFIG_OABI_COMPAT).
962 To use this you need GCC version 4.0.0 or later.
965 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
966 depends on AEABI && EXPERIMENTAL
969 This option preserves the old syscall interface along with the
970 new (ARM EABI) one. It also provides a compatibility layer to
971 intercept syscalls that have structure arguments which layout
972 in memory differs between the legacy ABI and the new ARM EABI
973 (only for non "thumb" binaries). This option adds a tiny
974 overhead to all syscalls and produces a slightly larger kernel.
975 If you know you'll be using only pure EABI user space then you
976 can say N here. If this option is not selected and you attempt
977 to execute a legacy ABI binary then the result will be
978 UNPREDICTABLE (in fact it can be predicted that it won't work
979 at all). If in doubt say Y.
981 config ARCH_HAS_HOLES_MEMORYMODEL
985 # Discontigmem is deprecated
986 config ARCH_DISCONTIGMEM_ENABLE
989 config ARCH_SPARSEMEM_ENABLE
992 config ARCH_SPARSEMEM_DEFAULT
993 def_bool ARCH_SPARSEMEM_ENABLE
995 config ARCH_SELECT_MEMORY_MODEL
996 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1000 default "4" if ARCH_LH7A40X
1002 depends on NEED_MULTIPLE_NODES
1005 bool "High Memory Support (EXPERIMENTAL)"
1006 depends on MMU && EXPERIMENTAL
1008 The address space of ARM processors is only 4 Gigabytes large
1009 and it has to accommodate user address space, kernel address
1010 space as well as some memory mapped IO. That means that, if you
1011 have a large amount of physical memory and/or IO, not all of the
1012 memory can be "permanently mapped" by the kernel. The physical
1013 memory that is not permanently mapped is called "high memory".
1015 Depending on the selected kernel/user memory split, minimum
1016 vmalloc space and actual amount of RAM, you may not need this
1017 option which should result in a slightly faster kernel.
1024 bool "Timer and CPU usage LEDs"
1025 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1026 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
1027 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1028 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1029 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1030 ARCH_AT91 || ARCH_DAVINCI || \
1031 ARCH_KS8695 || MACH_RD88F5182
1033 If you say Y here, the LEDs on your machine will be used
1034 to provide useful information about your current system status.
1036 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1037 be able to select which LEDs are active using the options below. If
1038 you are compiling a kernel for the EBSA-110 or the LART however, the
1039 red LED will simply flash regularly to indicate that the system is
1040 still functional. It is safe to say Y here if you have a CATS
1041 system, but the driver will do nothing.
1044 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1045 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1046 || MACH_OMAP_PERSEUS2
1048 depends on !GENERIC_CLOCKEVENTS
1049 default y if ARCH_EBSA110
1051 If you say Y here, one of the system LEDs (the green one on the
1052 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1053 will flash regularly to indicate that the system is still
1054 operational. This is mainly useful to kernel hackers who are
1055 debugging unstable kernels.
1057 The LART uses the same LED for both Timer LED and CPU usage LED
1058 functions. You may choose to use both, but the Timer LED function
1059 will overrule the CPU usage LED.
1062 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1064 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1065 || MACH_OMAP_PERSEUS2
1068 If you say Y here, the red LED will be used to give a good real
1069 time indication of CPU usage, by lighting whenever the idle task
1070 is not currently executing.
1072 The LART uses the same LED for both Timer LED and CPU usage LED
1073 functions. You may choose to use both, but the Timer LED function
1074 will overrule the CPU usage LED.
1076 config ALIGNMENT_TRAP
1078 depends on CPU_CP15_MMU
1079 default y if !ARCH_EBSA110
1081 ARM processors cannot fetch/store information which is not
1082 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1083 address divisible by 4. On 32-bit ARM processors, these non-aligned
1084 fetch/store instructions will be emulated in software if you say
1085 here, which has a severe performance impact. This is necessary for
1086 correct operation of some network protocols. With an IP-only
1087 configuration it is safe to say N, otherwise say Y.
1093 # Compressed boot loader in ROM. Yes, we really want to ask about
1094 # TEXT and BSS so we preserve their values in the config files.
1095 config ZBOOT_ROM_TEXT
1096 hex "Compressed ROM boot loader base address"
1099 The physical address at which the ROM-able zImage is to be
1100 placed in the target. Platforms which normally make use of
1101 ROM-able zImage formats normally set this to a suitable
1102 value in their defconfig file.
1104 If ZBOOT_ROM is not enabled, this has no effect.
1106 config ZBOOT_ROM_BSS
1107 hex "Compressed ROM boot loader BSS address"
1110 The base address of an area of read/write memory in the target
1111 for the ROM-able zImage which must be available while the
1112 decompressor is running. It must be large enough to hold the
1113 entire decompressed kernel plus an additional 128 KiB.
1114 Platforms which normally make use of ROM-able zImage formats
1115 normally set this to a suitable value in their defconfig file.
1117 If ZBOOT_ROM is not enabled, this has no effect.
1120 bool "Compressed boot loader in ROM/flash"
1121 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1123 Say Y here if you intend to execute your compressed kernel image
1124 (zImage) directly from ROM or flash. If unsure, say N.
1127 string "Default kernel command string"
1130 On some architectures (EBSA110 and CATS), there is currently no way
1131 for the boot loader to pass arguments to the kernel. For these
1132 architectures, you should supply some command-line options at build
1133 time by entering them here. As a minimum, you should specify the
1134 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1137 bool "Kernel Execute-In-Place from ROM"
1138 depends on !ZBOOT_ROM
1140 Execute-In-Place allows the kernel to run from non-volatile storage
1141 directly addressable by the CPU, such as NOR flash. This saves RAM
1142 space since the text section of the kernel is not loaded from flash
1143 to RAM. Read-write sections, such as the data section and stack,
1144 are still copied to RAM. The XIP kernel is not compressed since
1145 it has to run directly from flash, so it will take more space to
1146 store it. The flash address used to link the kernel object files,
1147 and for storing it, is configuration dependent. Therefore, if you
1148 say Y here, you must know the proper physical address where to
1149 store the kernel image depending on your own flash memory usage.
1151 Also note that the make target becomes "make xipImage" rather than
1152 "make zImage" or "make Image". The final kernel binary to put in
1153 ROM memory will be arch/arm/boot/xipImage.
1157 config XIP_PHYS_ADDR
1158 hex "XIP Kernel Physical Location"
1159 depends on XIP_KERNEL
1160 default "0x00080000"
1162 This is the physical address in your flash memory the kernel will
1163 be linked for and stored to. This address is dependent on your
1167 bool "Kexec system call (EXPERIMENTAL)"
1168 depends on EXPERIMENTAL
1170 kexec is a system call that implements the ability to shutdown your
1171 current kernel, and to start another kernel. It is like a reboot
1172 but it is independent of the system firmware. And like a reboot
1173 you can start any kernel with it, not just Linux.
1175 It is an ongoing process to be certain the hardware in a machine
1176 is properly shutdown, so do not be surprised if this code does not
1177 initially work for you. It may help to enable device hotplugging
1181 bool "Export atags in procfs"
1185 Should the atags used to boot the kernel be exported in an "atags"
1186 file in procfs. Useful with kexec.
1190 menu "CPU Power Management"
1192 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1194 source "drivers/cpufreq/Kconfig"
1196 config CPU_FREQ_SA1100
1198 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1201 config CPU_FREQ_SA1110
1203 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1206 config CPU_FREQ_INTEGRATOR
1207 tristate "CPUfreq driver for ARM Integrator CPUs"
1208 depends on ARCH_INTEGRATOR && CPU_FREQ
1211 This enables the CPUfreq driver for ARM Integrator CPUs.
1213 For details, take a look at <file:Documentation/cpu-freq>.
1218 tristate "CPUfreq driver for i.MX CPUs"
1219 depends on ARCH_IMX && CPU_FREQ
1222 This enables the CPUfreq driver for i.MX CPUs.
1228 source "drivers/cpuidle/Kconfig"
1232 menu "Floating point emulation"
1234 comment "At least one emulation must be selected"
1237 bool "NWFPE math emulation"
1238 depends on !AEABI || OABI_COMPAT
1240 Say Y to include the NWFPE floating point emulator in the kernel.
1241 This is necessary to run most binaries. Linux does not currently
1242 support floating point hardware so you need to say Y here even if
1243 your machine has an FPA or floating point co-processor podule.
1245 You may say N here if you are going to load the Acorn FPEmulator
1246 early in the bootup.
1249 bool "Support extended precision"
1250 depends on FPE_NWFPE
1252 Say Y to include 80-bit support in the kernel floating-point
1253 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1254 Note that gcc does not generate 80-bit operations by default,
1255 so in most cases this option only enlarges the size of the
1256 floating point emulator without any good reason.
1258 You almost surely want to say N here.
1261 bool "FastFPE math emulation (EXPERIMENTAL)"
1262 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1264 Say Y here to include the FAST floating point emulator in the kernel.
1265 This is an experimental much faster emulator which now also has full
1266 precision for the mantissa. It does not support any exceptions.
1267 It is very simple, and approximately 3-6 times faster than NWFPE.
1269 It should be sufficient for most programs. It may be not suitable
1270 for scientific calculations, but you have to check this for yourself.
1271 If you do not feel you need a faster FP emulation you should better
1275 bool "VFP-format floating point maths"
1276 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1278 Say Y to include VFP support code in the kernel. This is needed
1279 if your hardware includes a VFP unit.
1281 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1282 release notes and additional status information.
1284 Say N if your target does not have VFP hardware.
1292 bool "Advanced SIMD (NEON) Extension support"
1293 depends on VFPv3 && CPU_V7
1295 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1300 menu "Userspace binary formats"
1302 source "fs/Kconfig.binfmt"
1305 tristate "RISC OS personality"
1308 Say Y here to include the kernel code necessary if you want to run
1309 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1310 experimental; if this sounds frightening, say N and sleep in peace.
1311 You can also say M here to compile this support as a module (which
1312 will be called arthur).
1316 menu "Power management options"
1318 source "kernel/power/Kconfig"
1320 config ARCH_SUSPEND_POSSIBLE
1325 source "net/Kconfig"
1327 menu "Device Drivers"
1329 source "drivers/base/Kconfig"
1331 source "drivers/connector/Kconfig"
1333 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1334 source "drivers/mtd/Kconfig"
1337 source "drivers/parport/Kconfig"
1339 source "drivers/pnp/Kconfig"
1341 source "drivers/block/Kconfig"
1343 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1345 source "drivers/misc/Kconfig"
1347 source "drivers/ide/Kconfig"
1349 source "drivers/scsi/Kconfig"
1351 source "drivers/ata/Kconfig"
1353 source "drivers/md/Kconfig"
1355 source "drivers/message/fusion/Kconfig"
1357 source "drivers/ieee1394/Kconfig"
1359 source "drivers/message/i2o/Kconfig"
1361 source "drivers/net/Kconfig"
1363 source "drivers/isdn/Kconfig"
1365 # input before char - char/joystick depends on it. As does USB.
1367 source "drivers/input/Kconfig"
1369 source "drivers/char/Kconfig"
1371 source "drivers/i2c/Kconfig"
1373 source "drivers/spi/Kconfig"
1375 source "drivers/gpio/Kconfig"
1377 source "drivers/w1/Kconfig"
1379 source "drivers/power/Kconfig"
1381 source "drivers/hwmon/Kconfig"
1383 source "drivers/thermal/Kconfig"
1385 source "drivers/watchdog/Kconfig"
1387 source "drivers/ssb/Kconfig"
1389 #source "drivers/l3/Kconfig"
1391 source "drivers/mfd/Kconfig"
1393 source "drivers/media/Kconfig"
1395 source "drivers/video/Kconfig"
1397 source "sound/Kconfig"
1399 source "drivers/hid/Kconfig"
1401 source "drivers/usb/Kconfig"
1403 source "drivers/uwb/Kconfig"
1405 source "drivers/mmc/Kconfig"
1407 source "drivers/memstick/Kconfig"
1409 source "drivers/accessibility/Kconfig"
1411 source "drivers/leds/Kconfig"
1413 source "drivers/rtc/Kconfig"
1415 source "drivers/dma/Kconfig"
1417 source "drivers/dca/Kconfig"
1419 source "drivers/auxdisplay/Kconfig"
1421 source "drivers/regulator/Kconfig"
1423 source "drivers/uio/Kconfig"
1425 source "drivers/staging/Kconfig"
1431 source "arch/arm/Kconfig.debug"
1433 source "security/Kconfig"
1435 source "crypto/Kconfig"
1437 source "lib/Kconfig"