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
55 The Extended Industry Standard Architecture (EISA) bus was
56 developed as an open alternative to the IBM MicroChannel bus.
58 The EISA bus provided some of the features of the IBM MicroChannel
59 bus while maintaining backward compatibility with cards made for
60 the older ISA bus. The EISA bus saw limited use between 1988 and
61 1995 when it was made obsolete by the PCI bus.
63 Say Y here if you are building a kernel for an EISA-based machine.
73 MicroChannel Architecture is found in some IBM PS/2 machines and
74 laptops. It is a bus system similar to PCI or ISA. See
75 <file:Documentation/mca.txt> (and especially the web page given
76 there) before attempting to build an MCA bus kernel.
78 config GENERIC_HARDIRQS
82 config STACKTRACE_SUPPORT
86 config HAVE_LATENCYTOP_SUPPORT
91 config LOCKDEP_SUPPORT
95 config TRACE_IRQFLAGS_SUPPORT
99 config HARDIRQS_SW_RESEND
103 config GENERIC_IRQ_PROBE
107 config GENERIC_LOCKBREAK
110 depends on SMP && PREEMPT
112 config RWSEM_GENERIC_SPINLOCK
116 config RWSEM_XCHGADD_ALGORITHM
119 config ARCH_HAS_ILOG2_U32
122 config ARCH_HAS_ILOG2_U64
125 config GENERIC_HWEIGHT
129 config GENERIC_CALIBRATE_DELAY
133 config ARCH_MAY_HAVE_PC_FDC
139 config GENERIC_ISA_DMA
148 config GENERIC_HARDIRQS_NO__DO_IRQ
153 config OPROFILE_ARMV6
155 depends on CPU_V6 && !SMP
156 select OPROFILE_ARM11_CORE
158 config OPROFILE_MPCORE
160 depends on CPU_V6 && SMP
161 select OPROFILE_ARM11_CORE
163 config OPROFILE_ARM11_CORE
166 config OPROFILE_ARMV7
168 depends on CPU_V7 && !SMP
175 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
176 default DRAM_BASE if REMAP_VECTORS_TO_RAM
179 The base address of exception vectors.
181 source "init/Kconfig"
183 source "kernel/Kconfig.freezer"
188 bool "MMU-based Paged Memory Management Support"
191 Select if you want MMU-based virtualised addressing space
192 support by paged memory management. If unsure, say 'Y'.
195 prompt "ARM system type"
196 default ARCH_VERSATILE
199 bool "Agilent AAEC-2000 based"
204 This enables support for systems based on the Agilent AAEC-2000
206 config ARCH_INTEGRATOR
207 bool "ARM Ltd. Integrator family"
213 Support for ARM's Integrator platform.
216 bool "ARM Ltd. RealView family"
222 select GENERIC_CLOCKEVENTS
224 This enables support for ARM Ltd RealView boards.
226 config ARCH_VERSATILE
227 bool "ARM Ltd. Versatile family"
234 select GENERIC_CLOCKEVENTS
236 This enables support for ARM Ltd Versatile board.
241 select ARCH_REQUIRE_GPIOLIB
244 This enables support for systems based on the Atmel AT91RM9200,
245 AT91SAM9 and AT91CAP9 processors.
248 bool "Cirrus Logic CLPS711x/EP721x-based"
251 Support for Cirrus Logic 711x/721x based boards.
254 bool "Cortina Systems Gemini"
257 select ARCH_REQUIRE_GPIOLIB
259 Support for the Cortina Systems Gemini family SoCs
267 This is an evaluation board for the StrongARM processor available
268 from Digital. It has limited hardware on-board, including an
269 Ethernet interface, two PCMCIA sockets, two serial ports and a
280 select ARCH_REQUIRE_GPIOLIB
281 select ARCH_HAS_HOLES_MEMORYMODEL
283 This enables support for the Cirrus EP93xx series of CPUs.
285 config ARCH_FOOTBRIDGE
290 Support for systems based on the DC21285 companion chip
291 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
294 bool "Freescale MXC/iMX-based"
296 select GENERIC_CLOCKEVENTS
299 select ARCH_REQUIRE_GPIOLIB
302 Support for Freescale MXC/iMX-based family of processors
305 bool "Freescale STMP3xxx"
309 select ARCH_REQUIRE_GPIOLIB
311 select GENERIC_CLOCKEVENTS
313 select USB_ARCH_HAS_EHCI
315 Support for systems based on the Freescale 3xxx CPUs.
318 bool "Hilscher NetX based"
321 select GENERIC_CLOCKEVENTS
324 This enables support for systems based on the Hilscher NetX Soc
327 bool "Hynix HMS720x-based"
331 This enables support for systems based on the Hynix HMS720x
339 select ARCH_SUPPORTS_MSI
342 Support for Intel's IOP13XX (XScale) family of processors.
351 select ARCH_REQUIRE_GPIOLIB
353 Support for Intel's 80219 and IOP32X (XScale) family of
363 select ARCH_REQUIRE_GPIOLIB
365 Support for Intel's IOP33X (XScale) family of processors.
373 Support for Intel's IXP23xx (XScale) family of processors.
376 bool "IXP2400/2800-based"
381 Support for Intel's IXP2400/2800 (XScale) family of processors.
389 select GENERIC_CLOCKEVENTS
390 select DMABOUNCE if PCI
392 Support for Intel's IXP4XX (XScale) family of processors.
399 Say Y here if you intend to run this kernel on a LinkUp Systems
400 L7200 Software Development Board which uses an ARM720T processor.
401 Information on this board can be obtained at:
403 <http://www.linkupsys.com/>
405 If you have any questions or comments about the Linux kernel port
406 to this board, send e-mail to <sjhill@cotw.com>.
409 bool "Marvell Kirkwood"
413 select ARCH_REQUIRE_GPIOLIB
415 select GENERIC_CLOCKEVENTS
418 Support for the following Marvell Kirkwood series SoCs:
419 88F6180, 88F6192 and 88F6281.
422 bool "Marvell Loki (88RC8480)"
425 select GENERIC_CLOCKEVENTS
428 Support for the Marvell Loki (88RC8480) SoC.
431 bool "Marvell MV78xx0"
435 select ARCH_REQUIRE_GPIOLIB
437 select GENERIC_CLOCKEVENTS
440 Support for the following Marvell MV78xx0 series SoCs:
449 select ARCH_REQUIRE_GPIOLIB
451 select GENERIC_CLOCKEVENTS
454 Support for the following Marvell Orion 5x series SoCs:
455 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
456 Orion-2 (5281), Orion-1-90 (6183).
459 bool "Marvell PXA168/910"
462 select ARCH_REQUIRE_GPIOLIB
466 select GENERIC_CLOCKEVENTS
470 Support for Marvell's PXA168/910 processor line.
473 bool "Micrel/Kendin KS8695"
476 select ARCH_REQUIRE_GPIOLIB
478 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
479 System-on-Chip devices.
482 bool "NetSilicon NS9xxx"
486 select GENERIC_CLOCKEVENTS
489 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
492 <http://www.digi.com/products/microprocessors/index.jsp>
495 bool "Nuvoton W90X900 CPU"
497 select ARCH_REQUIRE_GPIOLIB
501 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
502 can login www.mcuos.com or www.nuvoton.com to know more.
505 bool "Philips Nexperia PNX4008 Mobile"
509 This enables support for Philips PNX4008 mobile platform.
512 bool "PXA2xx/PXA3xx-based"
518 select ARCH_REQUIRE_GPIOLIB
520 select GENERIC_CLOCKEVENTS
524 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
530 select GENERIC_CLOCKEVENTS
532 Support for Qualcomm MSM7K based systems. This runs on the ARM11
533 apps processor of the MSM7K and depends on a shared memory
534 interface to the ARM9 modem processor which runs the baseband stack
535 and controls some vital subsystems (clock and power control, etc).
542 select ARCH_MAY_HAVE_PC_FDC
543 select HAVE_PATA_PLATFORM
546 select ARCH_SPARSEMEM_ENABLE
548 On the Acorn Risc-PC, Linux can support the internal IDE disk and
549 CD-ROM interface, serial and parallel port, and the floppy drive.
555 select ARCH_SPARSEMEM_ENABLE
559 select GENERIC_CLOCKEVENTS
562 select ARCH_REQUIRE_GPIOLIB
564 Support for StrongARM 11x0 based boards.
567 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
571 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
572 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
573 the Samsung SMDK2410 development board (and derivatives).
576 bool "Samsung S3C64XX"
580 Samsung S3C64XX series based systems
590 Support for the StrongARM based Digital DNARD machine, also known
591 as "Shark" (<http://www.shark-linux.de/shark.html>).
596 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
597 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
599 Say Y here for systems based on one of the Sharp LH7A40X
600 System on a Chip processors. These CPUs include an ARM922T
601 core with a wide array of integrated devices for
602 hand-held and low-power applications.
605 bool "ST-Ericsson U300 Series"
611 select GENERIC_CLOCKEVENTS
616 Support for ST-Ericsson U300 series mobile platforms.
622 select GENERIC_CLOCKEVENTS
624 select ARCH_REQUIRE_GPIOLIB
629 select GENERIC_ALLOCATOR
631 Support for TI's DaVinci platform.
637 select ARCH_REQUIRE_GPIOLIB
639 select GENERIC_CLOCKEVENTS
641 Support for TI's OMAP platform (OMAP1 and OMAP2).
645 source "arch/arm/mach-clps711x/Kconfig"
647 source "arch/arm/mach-ep93xx/Kconfig"
649 source "arch/arm/mach-footbridge/Kconfig"
651 source "arch/arm/mach-gemini/Kconfig"
653 source "arch/arm/mach-integrator/Kconfig"
655 source "arch/arm/mach-iop32x/Kconfig"
657 source "arch/arm/mach-iop33x/Kconfig"
659 source "arch/arm/mach-iop13xx/Kconfig"
661 source "arch/arm/mach-ixp4xx/Kconfig"
663 source "arch/arm/mach-ixp2000/Kconfig"
665 source "arch/arm/mach-ixp23xx/Kconfig"
667 source "arch/arm/mach-loki/Kconfig"
669 source "arch/arm/mach-mv78xx0/Kconfig"
671 source "arch/arm/mach-pxa/Kconfig"
672 source "arch/arm/plat-pxa/Kconfig"
674 source "arch/arm/mach-mmp/Kconfig"
676 source "arch/arm/mach-sa1100/Kconfig"
678 source "arch/arm/plat-omap/Kconfig"
680 source "arch/arm/mach-omap1/Kconfig"
682 source "arch/arm/mach-omap2/Kconfig"
684 source "arch/arm/mach-orion5x/Kconfig"
686 source "arch/arm/mach-kirkwood/Kconfig"
688 source "arch/arm/plat-s3c24xx/Kconfig"
689 source "arch/arm/plat-s3c64xx/Kconfig"
690 source "arch/arm/plat-s3c/Kconfig"
693 source "arch/arm/mach-s3c2400/Kconfig"
694 source "arch/arm/mach-s3c2410/Kconfig"
695 source "arch/arm/mach-s3c2412/Kconfig"
696 source "arch/arm/mach-s3c2440/Kconfig"
697 source "arch/arm/mach-s3c2442/Kconfig"
698 source "arch/arm/mach-s3c2443/Kconfig"
702 source "arch/arm/mach-s3c6400/Kconfig"
703 source "arch/arm/mach-s3c6410/Kconfig"
706 source "arch/arm/plat-stmp3xxx/Kconfig"
708 source "arch/arm/mach-lh7a40x/Kconfig"
710 source "arch/arm/mach-h720x/Kconfig"
712 source "arch/arm/mach-versatile/Kconfig"
714 source "arch/arm/mach-aaec2000/Kconfig"
716 source "arch/arm/mach-realview/Kconfig"
718 source "arch/arm/mach-at91/Kconfig"
720 source "arch/arm/plat-mxc/Kconfig"
722 source "arch/arm/mach-netx/Kconfig"
724 source "arch/arm/mach-ns9xxx/Kconfig"
726 source "arch/arm/mach-davinci/Kconfig"
728 source "arch/arm/mach-ks8695/Kconfig"
730 source "arch/arm/mach-msm/Kconfig"
732 source "arch/arm/mach-u300/Kconfig"
734 source "arch/arm/mach-w90x900/Kconfig"
736 # Definitions to make life easier
749 source arch/arm/mm/Kconfig
752 bool "Enable iWMMXt support"
753 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
754 default y if PXA27x || PXA3xx || ARCH_MMP
756 Enable support for iWMMXt context switching at run time if
757 running on a CPU that supports it.
759 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
762 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
766 source "arch/arm/Kconfig-nommu"
769 config ARM_ERRATA_411920
770 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
771 depends on CPU_V6 && !SMP
773 Invalidation of the Instruction Cache operation can
774 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
775 It does not affect the MPCore. This option enables the ARM Ltd.
776 recommended workaround.
778 config ARM_ERRATA_430973
779 bool "ARM errata: Stale prediction on replaced interworking branch"
782 This option enables the workaround for the 430973 Cortex-A8
783 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
784 interworking branch is replaced with another code sequence at the
785 same virtual address, whether due to self-modifying code or virtual
786 to physical address re-mapping, Cortex-A8 does not recover from the
787 stale interworking branch prediction. This results in Cortex-A8
788 executing the new code sequence in the incorrect ARM or Thumb state.
789 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
790 and also flushes the branch target cache at every context switch.
791 Note that setting specific bits in the ACTLR register may not be
792 available in non-secure mode.
794 config ARM_ERRATA_458693
795 bool "ARM errata: Processor deadlock when a false hazard is created"
798 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
799 erratum. For very specific sequences of memory operations, it is
800 possible for a hazard condition intended for a cache line to instead
801 be incorrectly associated with a different cache line. This false
802 hazard might then cause a processor deadlock. The workaround enables
803 the L1 caching of the NEON accesses and disables the PLD instruction
804 in the ACTLR register. Note that setting specific bits in the ACTLR
805 register may not be available in non-secure mode.
807 config ARM_ERRATA_460075
808 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
811 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
812 erratum. Any asynchronous access to the L2 cache may encounter a
813 situation in which recent store transactions to the L2 cache are lost
814 and overwritten with stale memory contents from external memory. The
815 workaround disables the write-allocate mode for the L2 cache via the
816 ACTLR register. Note that setting specific bits in the ACTLR register
817 may not be available in non-secure mode.
821 source "arch/arm/common/Kconfig"
823 config FORCE_MAX_ZONEORDER
836 Find out whether you have ISA slots on your motherboard. ISA is the
837 name of a bus system, i.e. the way the CPU talks to the other stuff
838 inside your box. Other bus systems are PCI, EISA, MicroChannel
839 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
840 newer boards don't support it. If you have ISA, say Y, otherwise N.
842 # Select ISA DMA controller support
847 # Select ISA DMA interface
852 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
854 Find out whether you have a PCI motherboard. PCI is the name of a
855 bus system, i.e. the way the CPU talks to the other stuff inside
856 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
857 VESA. If you have PCI, say Y, otherwise N.
862 # Select the host bridge type
863 config PCI_HOST_VIA82C505
865 depends on PCI && ARCH_SHARK
868 config PCI_HOST_ITE8152
870 depends on PCI && MACH_ARMCORE
874 source "drivers/pci/Kconfig"
876 source "drivers/pcmcia/Kconfig"
880 menu "Kernel Features"
882 source "kernel/time/Kconfig"
885 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
886 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
887 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
888 depends on GENERIC_CLOCKEVENTS
889 select USE_GENERIC_SMP_HELPERS
890 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4)
892 This enables support for systems with more than one CPU. If you have
893 a system with only one CPU, like most personal computers, say N. If
894 you have a system with more than one CPU, say Y.
896 If you say N here, the kernel will run on single and multiprocessor
897 machines, but will use only one CPU of a multiprocessor machine. If
898 you say Y here, the kernel will run on many, but not all, single
899 processor machines. On a single processor machine, the kernel will
900 run faster if you say N here.
902 See also <file:Documentation/i386/IO-APIC.txt>,
903 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
904 <http://www.linuxdoc.org/docs.html#howto>.
906 If you don't know what to do here, say N.
912 This option enables support for the ARM system coherency unit
918 This options enables support for the ARM timer and watchdog unit
921 prompt "Memory split"
924 Select the desired split between kernel and user memory.
926 If you are not absolutely sure what you are doing, leave this
930 bool "3G/1G user/kernel split"
932 bool "2G/2G user/kernel split"
934 bool "1G/3G user/kernel split"
939 default 0x40000000 if VMSPLIT_1G
940 default 0x80000000 if VMSPLIT_2G
944 int "Maximum number of CPUs (2-32)"
950 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
951 depends on SMP && HOTPLUG && EXPERIMENTAL
953 Say Y here to experiment with turning CPUs off and on. CPUs
954 can be controlled through /sys/devices/system/cpu.
957 bool "Use local timer interrupts"
958 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
959 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
961 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4)
963 Enable support for local timers on SMP platforms, rather then the
964 legacy IPI broadcast method. Local timers allows the system
965 accounting to be spread across the timer interval, preventing a
966 "thundering herd" at every timer tick.
969 bool "Preemptible Kernel (EXPERIMENTAL)"
970 depends on EXPERIMENTAL
972 This option reduces the latency of the kernel when reacting to
973 real-time or interactive events by allowing a low priority process to
974 be preempted even if it is in kernel mode executing a system call.
975 This allows applications to run more reliably even when the system is
978 Say Y here if you are building a kernel for a desktop, embedded
979 or real-time system. Say N if you are unsure.
983 default 128 if ARCH_L7200
984 default 200 if ARCH_EBSA110 || ARCH_S3C2410
985 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
986 default AT91_TIMER_HZ if ARCH_AT91
990 bool "Compile the kernel in Thumb-2 mode"
991 depends on CPU_V7 && EXPERIMENTAL
993 select ARM_ASM_UNIFIED
995 By enabling this option, the kernel will be compiled in
996 Thumb-2 mode. A compiler/assembler that understand the unified
997 ARM-Thumb syntax is needed.
1001 config ARM_ASM_UNIFIED
1005 bool "Use the ARM EABI to compile the kernel"
1007 This option allows for the kernel to be compiled using the latest
1008 ARM ABI (aka EABI). This is only useful if you are using a user
1009 space environment that is also compiled with EABI.
1011 Since there are major incompatibilities between the legacy ABI and
1012 EABI, especially with regard to structure member alignment, this
1013 option also changes the kernel syscall calling convention to
1014 disambiguate both ABIs and allow for backward compatibility support
1015 (selected with CONFIG_OABI_COMPAT).
1017 To use this you need GCC version 4.0.0 or later.
1020 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1021 depends on AEABI && EXPERIMENTAL
1024 This option preserves the old syscall interface along with the
1025 new (ARM EABI) one. It also provides a compatibility layer to
1026 intercept syscalls that have structure arguments which layout
1027 in memory differs between the legacy ABI and the new ARM EABI
1028 (only for non "thumb" binaries). This option adds a tiny
1029 overhead to all syscalls and produces a slightly larger kernel.
1030 If you know you'll be using only pure EABI user space then you
1031 can say N here. If this option is not selected and you attempt
1032 to execute a legacy ABI binary then the result will be
1033 UNPREDICTABLE (in fact it can be predicted that it won't work
1034 at all). If in doubt say Y.
1036 config ARCH_HAS_HOLES_MEMORYMODEL
1039 # Discontigmem is deprecated
1040 config ARCH_DISCONTIGMEM_ENABLE
1043 config ARCH_SPARSEMEM_ENABLE
1046 config ARCH_SPARSEMEM_DEFAULT
1047 def_bool ARCH_SPARSEMEM_ENABLE
1049 config ARCH_SELECT_MEMORY_MODEL
1050 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1054 default "4" if ARCH_LH7A40X
1056 depends on NEED_MULTIPLE_NODES
1059 bool "High Memory Support (EXPERIMENTAL)"
1060 depends on MMU && EXPERIMENTAL
1062 The address space of ARM processors is only 4 Gigabytes large
1063 and it has to accommodate user address space, kernel address
1064 space as well as some memory mapped IO. That means that, if you
1065 have a large amount of physical memory and/or IO, not all of the
1066 memory can be "permanently mapped" by the kernel. The physical
1067 memory that is not permanently mapped is called "high memory".
1069 Depending on the selected kernel/user memory split, minimum
1070 vmalloc space and actual amount of RAM, you may not need this
1071 option which should result in a slightly faster kernel.
1078 bool "Timer and CPU usage LEDs"
1079 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1080 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1081 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1082 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1083 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1084 ARCH_AT91 || ARCH_DAVINCI || \
1085 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1087 If you say Y here, the LEDs on your machine will be used
1088 to provide useful information about your current system status.
1090 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1091 be able to select which LEDs are active using the options below. If
1092 you are compiling a kernel for the EBSA-110 or the LART however, the
1093 red LED will simply flash regularly to indicate that the system is
1094 still functional. It is safe to say Y here if you have a CATS
1095 system, but the driver will do nothing.
1098 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1099 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1100 || MACH_OMAP_PERSEUS2
1102 depends on !GENERIC_CLOCKEVENTS
1103 default y if ARCH_EBSA110
1105 If you say Y here, one of the system LEDs (the green one on the
1106 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1107 will flash regularly to indicate that the system is still
1108 operational. This is mainly useful to kernel hackers who are
1109 debugging unstable kernels.
1111 The LART uses the same LED for both Timer LED and CPU usage LED
1112 functions. You may choose to use both, but the Timer LED function
1113 will overrule the CPU usage LED.
1116 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1118 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1119 || MACH_OMAP_PERSEUS2
1122 If you say Y here, the red LED will be used to give a good real
1123 time indication of CPU usage, by lighting whenever the idle task
1124 is not currently executing.
1126 The LART uses the same LED for both Timer LED and CPU usage LED
1127 functions. You may choose to use both, but the Timer LED function
1128 will overrule the CPU usage LED.
1130 config ALIGNMENT_TRAP
1132 depends on CPU_CP15_MMU
1133 default y if !ARCH_EBSA110
1135 ARM processors cannot fetch/store information which is not
1136 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1137 address divisible by 4. On 32-bit ARM processors, these non-aligned
1138 fetch/store instructions will be emulated in software if you say
1139 here, which has a severe performance impact. This is necessary for
1140 correct operation of some network protocols. With an IP-only
1141 configuration it is safe to say N, otherwise say Y.
1143 config UACCESS_WITH_MEMCPY
1144 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1145 depends on MMU && EXPERIMENTAL
1146 default y if CPU_FEROCEON
1148 Implement faster copy_to_user and clear_user methods for CPU
1149 cores where a 8-word STM instruction give significantly higher
1150 memory write throughput than a sequence of individual 32bit stores.
1152 A possible side effect is a slight increase in scheduling latency
1153 between threads sharing the same address space if they invoke
1154 such copy operations with large buffers.
1156 However, if the CPU data cache is using a write-allocate mode,
1157 this option is unlikely to provide any performance gain.
1163 # Compressed boot loader in ROM. Yes, we really want to ask about
1164 # TEXT and BSS so we preserve their values in the config files.
1165 config ZBOOT_ROM_TEXT
1166 hex "Compressed ROM boot loader base address"
1169 The physical address at which the ROM-able zImage is to be
1170 placed in the target. Platforms which normally make use of
1171 ROM-able zImage formats normally set this to a suitable
1172 value in their defconfig file.
1174 If ZBOOT_ROM is not enabled, this has no effect.
1176 config ZBOOT_ROM_BSS
1177 hex "Compressed ROM boot loader BSS address"
1180 The base address of an area of read/write memory in the target
1181 for the ROM-able zImage which must be available while the
1182 decompressor is running. It must be large enough to hold the
1183 entire decompressed kernel plus an additional 128 KiB.
1184 Platforms which normally make use of ROM-able zImage formats
1185 normally set this to a suitable value in their defconfig file.
1187 If ZBOOT_ROM is not enabled, this has no effect.
1190 bool "Compressed boot loader in ROM/flash"
1191 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1193 Say Y here if you intend to execute your compressed kernel image
1194 (zImage) directly from ROM or flash. If unsure, say N.
1197 string "Default kernel command string"
1200 On some architectures (EBSA110 and CATS), there is currently no way
1201 for the boot loader to pass arguments to the kernel. For these
1202 architectures, you should supply some command-line options at build
1203 time by entering them here. As a minimum, you should specify the
1204 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1207 bool "Kernel Execute-In-Place from ROM"
1208 depends on !ZBOOT_ROM
1210 Execute-In-Place allows the kernel to run from non-volatile storage
1211 directly addressable by the CPU, such as NOR flash. This saves RAM
1212 space since the text section of the kernel is not loaded from flash
1213 to RAM. Read-write sections, such as the data section and stack,
1214 are still copied to RAM. The XIP kernel is not compressed since
1215 it has to run directly from flash, so it will take more space to
1216 store it. The flash address used to link the kernel object files,
1217 and for storing it, is configuration dependent. Therefore, if you
1218 say Y here, you must know the proper physical address where to
1219 store the kernel image depending on your own flash memory usage.
1221 Also note that the make target becomes "make xipImage" rather than
1222 "make zImage" or "make Image". The final kernel binary to put in
1223 ROM memory will be arch/arm/boot/xipImage.
1227 config XIP_PHYS_ADDR
1228 hex "XIP Kernel Physical Location"
1229 depends on XIP_KERNEL
1230 default "0x00080000"
1232 This is the physical address in your flash memory the kernel will
1233 be linked for and stored to. This address is dependent on your
1237 bool "Kexec system call (EXPERIMENTAL)"
1238 depends on EXPERIMENTAL
1240 kexec is a system call that implements the ability to shutdown your
1241 current kernel, and to start another kernel. It is like a reboot
1242 but it is independent of the system firmware. And like a reboot
1243 you can start any kernel with it, not just Linux.
1245 It is an ongoing process to be certain the hardware in a machine
1246 is properly shutdown, so do not be surprised if this code does not
1247 initially work for you. It may help to enable device hotplugging
1251 bool "Export atags in procfs"
1255 Should the atags used to boot the kernel be exported in an "atags"
1256 file in procfs. Useful with kexec.
1260 menu "CPU Power Management"
1262 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_PXA || ARCH_S3C64XX)
1264 source "drivers/cpufreq/Kconfig"
1266 config CPU_FREQ_SA1100
1268 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1271 config CPU_FREQ_SA1110
1273 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1276 config CPU_FREQ_INTEGRATOR
1277 tristate "CPUfreq driver for ARM Integrator CPUs"
1278 depends on ARCH_INTEGRATOR && CPU_FREQ
1281 This enables the CPUfreq driver for ARM Integrator CPUs.
1283 For details, take a look at <file:Documentation/cpu-freq>.
1289 depends on CPU_FREQ && ARCH_PXA && PXA25x
1291 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1293 config CPU_FREQ_S3C64XX
1294 bool "CPUfreq support for Samsung S3C64XX CPUs"
1295 depends on CPU_FREQ && CPU_S3C6410
1299 source "drivers/cpuidle/Kconfig"
1303 menu "Floating point emulation"
1305 comment "At least one emulation must be selected"
1308 bool "NWFPE math emulation"
1309 depends on !AEABI || OABI_COMPAT
1311 Say Y to include the NWFPE floating point emulator in the kernel.
1312 This is necessary to run most binaries. Linux does not currently
1313 support floating point hardware so you need to say Y here even if
1314 your machine has an FPA or floating point co-processor podule.
1316 You may say N here if you are going to load the Acorn FPEmulator
1317 early in the bootup.
1320 bool "Support extended precision"
1321 depends on FPE_NWFPE
1323 Say Y to include 80-bit support in the kernel floating-point
1324 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1325 Note that gcc does not generate 80-bit operations by default,
1326 so in most cases this option only enlarges the size of the
1327 floating point emulator without any good reason.
1329 You almost surely want to say N here.
1332 bool "FastFPE math emulation (EXPERIMENTAL)"
1333 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1335 Say Y here to include the FAST floating point emulator in the kernel.
1336 This is an experimental much faster emulator which now also has full
1337 precision for the mantissa. It does not support any exceptions.
1338 It is very simple, and approximately 3-6 times faster than NWFPE.
1340 It should be sufficient for most programs. It may be not suitable
1341 for scientific calculations, but you have to check this for yourself.
1342 If you do not feel you need a faster FP emulation you should better
1346 bool "VFP-format floating point maths"
1347 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1349 Say Y to include VFP support code in the kernel. This is needed
1350 if your hardware includes a VFP unit.
1352 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1353 release notes and additional status information.
1355 Say N if your target does not have VFP hardware.
1363 bool "Advanced SIMD (NEON) Extension support"
1364 depends on VFPv3 && CPU_V7
1366 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1371 menu "Userspace binary formats"
1373 source "fs/Kconfig.binfmt"
1376 tristate "RISC OS personality"
1379 Say Y here to include the kernel code necessary if you want to run
1380 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1381 experimental; if this sounds frightening, say N and sleep in peace.
1382 You can also say M here to compile this support as a module (which
1383 will be called arthur).
1387 menu "Power management options"
1389 source "kernel/power/Kconfig"
1391 config ARCH_SUSPEND_POSSIBLE
1396 source "net/Kconfig"
1398 menu "Device Drivers"
1400 source "drivers/base/Kconfig"
1402 source "drivers/connector/Kconfig"
1404 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1405 source "drivers/mtd/Kconfig"
1408 source "drivers/parport/Kconfig"
1410 source "drivers/pnp/Kconfig"
1412 source "drivers/block/Kconfig"
1414 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1416 source "drivers/misc/Kconfig"
1418 source "drivers/ide/Kconfig"
1420 source "drivers/scsi/Kconfig"
1422 source "drivers/ata/Kconfig"
1424 source "drivers/md/Kconfig"
1426 source "drivers/message/fusion/Kconfig"
1428 source "drivers/ieee1394/Kconfig"
1430 source "drivers/message/i2o/Kconfig"
1432 source "drivers/net/Kconfig"
1434 source "drivers/isdn/Kconfig"
1436 # input before char - char/joystick depends on it. As does USB.
1438 source "drivers/input/Kconfig"
1440 source "drivers/char/Kconfig"
1442 source "drivers/i2c/Kconfig"
1444 source "drivers/spi/Kconfig"
1446 source "drivers/gpio/Kconfig"
1448 source "drivers/w1/Kconfig"
1450 source "drivers/power/Kconfig"
1452 source "drivers/hwmon/Kconfig"
1454 source "drivers/thermal/Kconfig"
1456 source "drivers/watchdog/Kconfig"
1458 source "drivers/ssb/Kconfig"
1460 #source "drivers/l3/Kconfig"
1462 source "drivers/mfd/Kconfig"
1464 source "drivers/media/Kconfig"
1466 source "drivers/video/Kconfig"
1468 source "sound/Kconfig"
1470 source "drivers/hid/Kconfig"
1472 source "drivers/usb/Kconfig"
1474 source "drivers/uwb/Kconfig"
1476 source "drivers/mmc/Kconfig"
1478 source "drivers/memstick/Kconfig"
1480 source "drivers/accessibility/Kconfig"
1482 source "drivers/leds/Kconfig"
1484 source "drivers/rtc/Kconfig"
1486 source "drivers/dma/Kconfig"
1488 source "drivers/dca/Kconfig"
1490 source "drivers/auxdisplay/Kconfig"
1492 source "drivers/regulator/Kconfig"
1494 source "drivers/uio/Kconfig"
1496 source "drivers/staging/Kconfig"
1502 source "arch/arm/Kconfig.debug"
1504 source "security/Kconfig"
1506 source "crypto/Kconfig"
1508 source "lib/Kconfig"