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 GENERIC_HWEIGHT
133 config GENERIC_CALIBRATE_DELAY
137 config ARCH_MAY_HAVE_PC_FDC
143 config GENERIC_ISA_DMA
152 config GENERIC_HARDIRQS_NO__DO_IRQ
157 config OPROFILE_ARMV6
159 depends on CPU_V6 && !SMP
160 select OPROFILE_ARM11_CORE
162 config OPROFILE_MPCORE
164 depends on CPU_V6 && SMP
165 select OPROFILE_ARM11_CORE
167 config OPROFILE_ARM11_CORE
170 config OPROFILE_ARMV7
172 depends on CPU_V7 && !SMP
179 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
180 default DRAM_BASE if REMAP_VECTORS_TO_RAM
183 The base address of exception vectors.
185 source "init/Kconfig"
187 source "kernel/Kconfig.freezer"
192 prompt "ARM system type"
193 default ARCH_VERSATILE
196 bool "Agilent AAEC-2000 based"
201 This enables support for systems based on the Agilent AAEC-2000
203 config ARCH_INTEGRATOR
204 bool "ARM Ltd. Integrator family"
210 Support for ARM's Integrator platform.
213 bool "ARM Ltd. RealView family"
219 select GENERIC_CLOCKEVENTS
221 This enables support for ARM Ltd RealView boards.
223 config ARCH_VERSATILE
224 bool "ARM Ltd. Versatile family"
231 select GENERIC_CLOCKEVENTS
233 This enables support for ARM Ltd Versatile board.
238 select ARCH_REQUIRE_GPIOLIB
241 This enables support for systems based on the Atmel AT91RM9200,
242 AT91SAM9 and AT91CAP9 processors.
245 bool "Cirrus Logic CLPS711x/EP721x-based"
248 Support for Cirrus Logic 711x/721x based boards.
251 bool "Cortina Systems Gemini"
254 select ARCH_REQUIRE_GPIOLIB
256 Support for the Cortina Systems Gemini family SoCs
264 This is an evaluation board for the StrongARM processor available
265 from Digital. It has limited hardware on-board, including an
266 Ethernet interface, two PCMCIA sockets, two serial ports and a
277 select ARCH_REQUIRE_GPIOLIB
278 select ARCH_HAS_HOLES_MEMORYMODEL
280 This enables support for the Cirrus EP93xx series of CPUs.
282 config ARCH_FOOTBRIDGE
287 Support for systems based on the DC21285 companion chip
288 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
291 bool "Freescale MXC/iMX-based"
293 select GENERIC_CLOCKEVENTS
296 select ARCH_REQUIRE_GPIOLIB
299 Support for Freescale MXC/iMX-based family of processors
302 bool "Hilscher NetX based"
305 select GENERIC_CLOCKEVENTS
308 This enables support for systems based on the Hilscher NetX Soc
311 bool "Hynix HMS720x-based"
315 This enables support for systems based on the Hynix HMS720x
323 select ARCH_SUPPORTS_MSI
326 Support for Intel's IOP13XX (XScale) family of processors.
335 select ARCH_REQUIRE_GPIOLIB
337 Support for Intel's 80219 and IOP32X (XScale) family of
347 select ARCH_REQUIRE_GPIOLIB
349 Support for Intel's IOP33X (XScale) family of processors.
357 Support for Intel's IXP23xx (XScale) family of processors.
360 bool "IXP2400/2800-based"
365 Support for Intel's IXP2400/2800 (XScale) family of processors.
373 select GENERIC_CLOCKEVENTS
374 select DMABOUNCE if PCI
376 Support for Intel's IXP4XX (XScale) family of processors.
383 Say Y here if you intend to run this kernel on a LinkUp Systems
384 L7200 Software Development Board which uses an ARM720T processor.
385 Information on this board can be obtained at:
387 <http://www.linkupsys.com/>
389 If you have any questions or comments about the Linux kernel port
390 to this board, send e-mail to <sjhill@cotw.com>.
393 bool "Marvell Kirkwood"
397 select ARCH_REQUIRE_GPIOLIB
399 select GENERIC_CLOCKEVENTS
402 Support for the following Marvell Kirkwood series SoCs:
403 88F6180, 88F6192 and 88F6281.
406 bool "Marvell Loki (88RC8480)"
409 select GENERIC_CLOCKEVENTS
412 Support for the Marvell Loki (88RC8480) SoC.
415 bool "Marvell MV78xx0"
419 select ARCH_REQUIRE_GPIOLIB
421 select GENERIC_CLOCKEVENTS
424 Support for the following Marvell MV78xx0 series SoCs:
433 select ARCH_REQUIRE_GPIOLIB
435 select GENERIC_CLOCKEVENTS
438 Support for the following Marvell Orion 5x series SoCs:
439 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
440 Orion-2 (5281), Orion-1-90 (6183).
443 bool "Marvell PXA168/910"
446 select ARCH_REQUIRE_GPIOLIB
450 select GENERIC_CLOCKEVENTS
454 Support for Marvell's PXA168/910 processor line.
457 bool "Micrel/Kendin KS8695"
460 select ARCH_REQUIRE_GPIOLIB
462 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
463 System-on-Chip devices.
466 bool "NetSilicon NS9xxx"
470 select GENERIC_CLOCKEVENTS
473 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
476 <http://www.digi.com/products/microprocessors/index.jsp>
479 bool "Nuvoton W90X900 CPU"
482 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
483 can login www.mcuos.com or www.nuvoton.com to know more.
486 bool "Philips Nexperia PNX4008 Mobile"
490 This enables support for Philips PNX4008 mobile platform.
493 bool "PXA2xx/PXA3xx-based"
499 select ARCH_REQUIRE_GPIOLIB
501 select GENERIC_CLOCKEVENTS
505 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
511 select GENERIC_CLOCKEVENTS
513 Support for Qualcomm MSM7K based systems. This runs on the ARM11
514 apps processor of the MSM7K and depends on a shared memory
515 interface to the ARM9 modem processor which runs the baseband stack
516 and controls some vital subsystems (clock and power control, etc).
523 select ARCH_MAY_HAVE_PC_FDC
524 select HAVE_PATA_PLATFORM
527 select ARCH_SPARSEMEM_ENABLE
529 On the Acorn Risc-PC, Linux can support the internal IDE disk and
530 CD-ROM interface, serial and parallel port, and the floppy drive.
536 select ARCH_SPARSEMEM_ENABLE
540 select GENERIC_CLOCKEVENTS
543 select ARCH_REQUIRE_GPIOLIB
545 Support for StrongARM 11x0 based boards.
548 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
552 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
553 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
554 the Samsung SMDK2410 development board (and derivatives).
557 bool "Samsung S3C64XX"
561 Samsung S3C64XX series based systems
571 Support for the StrongARM based Digital DNARD machine, also known
572 as "Shark" (<http://www.shark-linux.de/shark.html>).
577 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
578 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
580 Say Y here for systems based on one of the Sharp LH7A40X
581 System on a Chip processors. These CPUs include an ARM922T
582 core with a wide array of integrated devices for
583 hand-held and low-power applications.
589 select GENERIC_CLOCKEVENTS
591 select ARCH_REQUIRE_GPIOLIB
596 select GENERIC_ALLOCATOR
598 Support for TI's DaVinci platform.
604 select ARCH_REQUIRE_GPIOLIB
606 select GENERIC_CLOCKEVENTS
608 Support for TI's OMAP platform (OMAP1 and OMAP2).
612 source "arch/arm/mach-clps711x/Kconfig"
614 source "arch/arm/mach-ep93xx/Kconfig"
616 source "arch/arm/mach-footbridge/Kconfig"
618 source "arch/arm/mach-gemini/Kconfig"
620 source "arch/arm/mach-integrator/Kconfig"
622 source "arch/arm/mach-iop32x/Kconfig"
624 source "arch/arm/mach-iop33x/Kconfig"
626 source "arch/arm/mach-iop13xx/Kconfig"
628 source "arch/arm/mach-ixp4xx/Kconfig"
630 source "arch/arm/mach-ixp2000/Kconfig"
632 source "arch/arm/mach-ixp23xx/Kconfig"
634 source "arch/arm/mach-loki/Kconfig"
636 source "arch/arm/mach-mv78xx0/Kconfig"
638 source "arch/arm/mach-pxa/Kconfig"
639 source "arch/arm/plat-pxa/Kconfig"
641 source "arch/arm/mach-mmp/Kconfig"
643 source "arch/arm/mach-sa1100/Kconfig"
645 source "arch/arm/plat-omap/Kconfig"
647 source "arch/arm/mach-omap1/Kconfig"
649 source "arch/arm/mach-omap2/Kconfig"
651 source "arch/arm/mach-orion5x/Kconfig"
653 source "arch/arm/mach-kirkwood/Kconfig"
655 source "arch/arm/plat-s3c24xx/Kconfig"
656 source "arch/arm/plat-s3c64xx/Kconfig"
657 source "arch/arm/plat-s3c/Kconfig"
660 source "arch/arm/mach-s3c2400/Kconfig"
661 source "arch/arm/mach-s3c2410/Kconfig"
662 source "arch/arm/mach-s3c2412/Kconfig"
663 source "arch/arm/mach-s3c2440/Kconfig"
664 source "arch/arm/mach-s3c2442/Kconfig"
665 source "arch/arm/mach-s3c2443/Kconfig"
669 source "arch/arm/mach-s3c6400/Kconfig"
670 source "arch/arm/mach-s3c6410/Kconfig"
673 source "arch/arm/mach-lh7a40x/Kconfig"
675 source "arch/arm/mach-h720x/Kconfig"
677 source "arch/arm/mach-versatile/Kconfig"
679 source "arch/arm/mach-aaec2000/Kconfig"
681 source "arch/arm/mach-realview/Kconfig"
683 source "arch/arm/mach-at91/Kconfig"
685 source "arch/arm/plat-mxc/Kconfig"
687 source "arch/arm/mach-netx/Kconfig"
689 source "arch/arm/mach-ns9xxx/Kconfig"
691 source "arch/arm/mach-davinci/Kconfig"
693 source "arch/arm/mach-ks8695/Kconfig"
695 source "arch/arm/mach-msm/Kconfig"
697 source "arch/arm/mach-w90x900/Kconfig"
699 # Definitions to make life easier
712 source arch/arm/mm/Kconfig
715 bool "Enable iWMMXt support"
716 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
717 default y if PXA27x || PXA3xx || ARCH_MMP
719 Enable support for iWMMXt context switching at run time if
720 running on a CPU that supports it.
722 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
725 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
729 source "arch/arm/Kconfig-nommu"
732 config ARM_ERRATA_411920
733 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
734 depends on CPU_V6 && !SMP
736 Invalidation of the Instruction Cache operation can
737 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
738 It does not affect the MPCore. This option enables the ARM Ltd.
739 recommended workaround.
741 config ARM_ERRATA_430973
742 bool "ARM errata: Stale prediction on replaced interworking branch"
745 This option enables the workaround for the 430973 Cortex-A8
746 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
747 interworking branch is replaced with another code sequence at the
748 same virtual address, whether due to self-modifying code or virtual
749 to physical address re-mapping, Cortex-A8 does not recover from the
750 stale interworking branch prediction. This results in Cortex-A8
751 executing the new code sequence in the incorrect ARM or Thumb state.
752 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
753 and also flushes the branch target cache at every context switch.
754 Note that setting specific bits in the ACTLR register may not be
755 available in non-secure mode.
757 config ARM_ERRATA_458693
758 bool "ARM errata: Processor deadlock when a false hazard is created"
761 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
762 erratum. For very specific sequences of memory operations, it is
763 possible for a hazard condition intended for a cache line to instead
764 be incorrectly associated with a different cache line. This false
765 hazard might then cause a processor deadlock. The workaround enables
766 the L1 caching of the NEON accesses and disables the PLD instruction
767 in the ACTLR register. Note that setting specific bits in the ACTLR
768 register may not be available in non-secure mode.
770 config ARM_ERRATA_460075
771 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
774 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
775 erratum. Any asynchronous access to the L2 cache may encounter a
776 situation in which recent store transactions to the L2 cache are lost
777 and overwritten with stale memory contents from external memory. The
778 workaround disables the write-allocate mode for the L2 cache via the
779 ACTLR register. Note that setting specific bits in the ACTLR register
780 may not be available in non-secure mode.
784 source "arch/arm/common/Kconfig"
786 config FORCE_MAX_ZONEORDER
799 Find out whether you have ISA slots on your motherboard. ISA is the
800 name of a bus system, i.e. the way the CPU talks to the other stuff
801 inside your box. Other bus systems are PCI, EISA, MicroChannel
802 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
803 newer boards don't support it. If you have ISA, say Y, otherwise N.
805 # Select ISA DMA controller support
810 # Select ISA DMA interface
815 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
817 Find out whether you have a PCI motherboard. PCI is the name of a
818 bus system, i.e. the way the CPU talks to the other stuff inside
819 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
820 VESA. If you have PCI, say Y, otherwise N.
825 # Select the host bridge type
826 config PCI_HOST_VIA82C505
828 depends on PCI && ARCH_SHARK
831 config PCI_HOST_ITE8152
833 depends on PCI && MACH_ARMCORE
837 source "drivers/pci/Kconfig"
839 source "drivers/pcmcia/Kconfig"
843 menu "Kernel Features"
845 source "kernel/time/Kconfig"
848 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
849 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP ||ARCH_OMAP4)
850 depends on GENERIC_CLOCKEVENTS
851 select USE_GENERIC_SMP_HELPERS
852 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4)
854 This enables support for systems with more than one CPU. If you have
855 a system with only one CPU, like most personal computers, say N. If
856 you have a system with more than one CPU, say Y.
858 If you say N here, the kernel will run on single and multiprocessor
859 machines, but will use only one CPU of a multiprocessor machine. If
860 you say Y here, the kernel will run on many, but not all, single
861 processor machines. On a single processor machine, the kernel will
862 run faster if you say N here.
864 See also <file:Documentation/i386/IO-APIC.txt>,
865 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
866 <http://www.linuxdoc.org/docs.html#howto>.
868 If you don't know what to do here, say N.
874 This option enables support for the ARM system coherency unit
880 This options enables support for the ARM timer and watchdog unit
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 || ARCH_OMAP4)
922 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4)
924 Enable support for local timers on SMP platforms, rather then the
925 legacy IPI broadcast method. Local timers allows the system
926 accounting to be spread across the timer interval, preventing a
927 "thundering herd" at every timer tick.
930 bool "Preemptible Kernel (EXPERIMENTAL)"
931 depends on EXPERIMENTAL
933 This option reduces the latency of the kernel when reacting to
934 real-time or interactive events by allowing a low priority process to
935 be preempted even if it is in kernel mode executing a system call.
936 This allows applications to run more reliably even when the system is
939 Say Y here if you are building a kernel for a desktop, embedded
940 or real-time system. Say N if you are unsure.
944 default 128 if ARCH_L7200
945 default 200 if ARCH_EBSA110 || ARCH_S3C2410
946 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
947 default AT91_TIMER_HZ if ARCH_AT91
951 bool "Use the ARM EABI to compile the kernel"
953 This option allows for the kernel to be compiled using the latest
954 ARM ABI (aka EABI). This is only useful if you are using a user
955 space environment that is also compiled with EABI.
957 Since there are major incompatibilities between the legacy ABI and
958 EABI, especially with regard to structure member alignment, this
959 option also changes the kernel syscall calling convention to
960 disambiguate both ABIs and allow for backward compatibility support
961 (selected with CONFIG_OABI_COMPAT).
963 To use this you need GCC version 4.0.0 or later.
966 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
967 depends on AEABI && EXPERIMENTAL
970 This option preserves the old syscall interface along with the
971 new (ARM EABI) one. It also provides a compatibility layer to
972 intercept syscalls that have structure arguments which layout
973 in memory differs between the legacy ABI and the new ARM EABI
974 (only for non "thumb" binaries). This option adds a tiny
975 overhead to all syscalls and produces a slightly larger kernel.
976 If you know you'll be using only pure EABI user space then you
977 can say N here. If this option is not selected and you attempt
978 to execute a legacy ABI binary then the result will be
979 UNPREDICTABLE (in fact it can be predicted that it won't work
980 at all). If in doubt say Y.
982 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_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_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>.
1219 depends on CPU_FREQ && ARCH_PXA && PXA25x
1221 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1225 source "drivers/cpuidle/Kconfig"
1229 menu "Floating point emulation"
1231 comment "At least one emulation must be selected"
1234 bool "NWFPE math emulation"
1235 depends on !AEABI || OABI_COMPAT
1237 Say Y to include the NWFPE floating point emulator in the kernel.
1238 This is necessary to run most binaries. Linux does not currently
1239 support floating point hardware so you need to say Y here even if
1240 your machine has an FPA or floating point co-processor podule.
1242 You may say N here if you are going to load the Acorn FPEmulator
1243 early in the bootup.
1246 bool "Support extended precision"
1247 depends on FPE_NWFPE
1249 Say Y to include 80-bit support in the kernel floating-point
1250 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1251 Note that gcc does not generate 80-bit operations by default,
1252 so in most cases this option only enlarges the size of the
1253 floating point emulator without any good reason.
1255 You almost surely want to say N here.
1258 bool "FastFPE math emulation (EXPERIMENTAL)"
1259 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1261 Say Y here to include the FAST floating point emulator in the kernel.
1262 This is an experimental much faster emulator which now also has full
1263 precision for the mantissa. It does not support any exceptions.
1264 It is very simple, and approximately 3-6 times faster than NWFPE.
1266 It should be sufficient for most programs. It may be not suitable
1267 for scientific calculations, but you have to check this for yourself.
1268 If you do not feel you need a faster FP emulation you should better
1272 bool "VFP-format floating point maths"
1273 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1275 Say Y to include VFP support code in the kernel. This is needed
1276 if your hardware includes a VFP unit.
1278 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1279 release notes and additional status information.
1281 Say N if your target does not have VFP hardware.
1289 bool "Advanced SIMD (NEON) Extension support"
1290 depends on VFPv3 && CPU_V7
1292 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1297 menu "Userspace binary formats"
1299 source "fs/Kconfig.binfmt"
1302 tristate "RISC OS personality"
1305 Say Y here to include the kernel code necessary if you want to run
1306 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1307 experimental; if this sounds frightening, say N and sleep in peace.
1308 You can also say M here to compile this support as a module (which
1309 will be called arthur).
1313 menu "Power management options"
1315 source "kernel/power/Kconfig"
1317 config ARCH_SUSPEND_POSSIBLE
1322 source "net/Kconfig"
1324 menu "Device Drivers"
1326 source "drivers/base/Kconfig"
1328 source "drivers/connector/Kconfig"
1330 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1331 source "drivers/mtd/Kconfig"
1334 source "drivers/parport/Kconfig"
1336 source "drivers/pnp/Kconfig"
1338 source "drivers/block/Kconfig"
1340 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1342 source "drivers/misc/Kconfig"
1344 source "drivers/ide/Kconfig"
1346 source "drivers/scsi/Kconfig"
1348 source "drivers/ata/Kconfig"
1350 source "drivers/md/Kconfig"
1352 source "drivers/message/fusion/Kconfig"
1354 source "drivers/ieee1394/Kconfig"
1356 source "drivers/message/i2o/Kconfig"
1358 source "drivers/net/Kconfig"
1360 source "drivers/isdn/Kconfig"
1362 # input before char - char/joystick depends on it. As does USB.
1364 source "drivers/input/Kconfig"
1366 source "drivers/char/Kconfig"
1368 source "drivers/i2c/Kconfig"
1370 source "drivers/spi/Kconfig"
1372 source "drivers/gpio/Kconfig"
1374 source "drivers/w1/Kconfig"
1376 source "drivers/power/Kconfig"
1378 source "drivers/hwmon/Kconfig"
1380 source "drivers/thermal/Kconfig"
1382 source "drivers/watchdog/Kconfig"
1384 source "drivers/ssb/Kconfig"
1386 #source "drivers/l3/Kconfig"
1388 source "drivers/mfd/Kconfig"
1390 source "drivers/media/Kconfig"
1392 source "drivers/video/Kconfig"
1394 source "sound/Kconfig"
1396 source "drivers/hid/Kconfig"
1398 source "drivers/usb/Kconfig"
1400 source "drivers/uwb/Kconfig"
1402 source "drivers/mmc/Kconfig"
1404 source "drivers/memstick/Kconfig"
1406 source "drivers/accessibility/Kconfig"
1408 source "drivers/leds/Kconfig"
1410 source "drivers/rtc/Kconfig"
1412 source "drivers/dma/Kconfig"
1414 source "drivers/dca/Kconfig"
1416 source "drivers/auxdisplay/Kconfig"
1418 source "drivers/regulator/Kconfig"
1420 source "drivers/uio/Kconfig"
1422 source "drivers/staging/Kconfig"
1428 source "arch/arm/Kconfig.debug"
1430 source "security/Kconfig"
1432 source "crypto/Kconfig"
1434 source "lib/Kconfig"