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"
401 select ARCH_REQUIRE_GPIOLIB
403 select GENERIC_CLOCKEVENTS
406 Support for the following Marvell Kirkwood series SoCs:
407 88F6180, 88F6192 and 88F6281.
410 bool "Micrel/Kendin KS8695"
413 select ARCH_REQUIRE_GPIOLIB
415 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
416 System-on-Chip devices.
419 bool "NetSilicon NS9xxx"
423 select GENERIC_CLOCKEVENTS
426 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
429 <http://www.digi.com/products/microprocessors/index.jsp>
432 bool "Marvell Loki (88RC8480)"
435 select GENERIC_CLOCKEVENTS
438 Support for the Marvell Loki (88RC8480) SoC.
441 bool "Marvell MV78xx0"
445 select ARCH_REQUIRE_GPIOLIB
447 select GENERIC_CLOCKEVENTS
450 Support for the following Marvell MV78xx0 series SoCs:
454 bool "Freescale MXC/iMX-based"
456 select GENERIC_CLOCKEVENTS
459 select ARCH_REQUIRE_GPIOLIB
462 Support for Freescale MXC/iMX-based family of processors
470 select ARCH_REQUIRE_GPIOLIB
472 select GENERIC_CLOCKEVENTS
475 Support for the following Marvell Orion 5x series SoCs:
476 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
477 Orion-2 (5281), Orion-1-90 (6183).
480 bool "Philips Nexperia PNX4008 Mobile"
484 This enables support for Philips PNX4008 mobile platform.
487 bool "PXA2xx/PXA3xx-based"
493 select ARCH_REQUIRE_GPIOLIB
495 select GENERIC_CLOCKEVENTS
499 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
502 bool "Marvell PXA168/910"
505 select ARCH_REQUIRE_GPIOLIB
509 select GENERIC_CLOCKEVENTS
513 Support for Marvell's PXA168/910 processor line.
520 select ARCH_MAY_HAVE_PC_FDC
521 select HAVE_PATA_PLATFORM
524 select ARCH_SPARSEMEM_ENABLE
526 On the Acorn Risc-PC, Linux can support the internal IDE disk and
527 CD-ROM interface, serial and parallel port, and the floppy drive.
533 select ARCH_SPARSEMEM_ENABLE
537 select GENERIC_CLOCKEVENTS
540 select ARCH_REQUIRE_GPIOLIB
542 Support for StrongARM 11x0 based boards.
545 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
549 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
550 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
551 the Samsung SMDK2410 development board (and derivatives).
554 bool "Samsung S3C64XX"
558 Samsung S3C64XX series based systems
568 Support for the StrongARM based Digital DNARD machine, also known
569 as "Shark" (<http://www.shark-linux.de/shark.html>).
574 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
575 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
577 Say Y here for systems based on one of the Sharp LH7A40X
578 System on a Chip processors. These CPUs include an ARM922T
579 core with a wide array of integrated devices for
580 hand-held and low-power applications.
586 select GENERIC_CLOCKEVENTS
588 select ARCH_REQUIRE_GPIOLIB
594 Support for TI's DaVinci platform.
600 select ARCH_REQUIRE_GPIOLIB
602 select GENERIC_CLOCKEVENTS
604 Support for TI's OMAP platform (OMAP1 and OMAP2).
610 select GENERIC_CLOCKEVENTS
612 Support for Qualcomm MSM7K based systems. This runs on the ARM11
613 apps processor of the MSM7K and depends on a shared memory
614 interface to the ARM9 modem processor which runs the baseband stack
615 and controls some vital subsystems (clock and power control, etc).
618 bool "Nuvoton W90X900 CPU"
621 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
622 can login www.mcuos.com or www.nuvoton.com to know more.
626 source "arch/arm/mach-clps711x/Kconfig"
628 source "arch/arm/mach-ep93xx/Kconfig"
630 source "arch/arm/mach-footbridge/Kconfig"
632 source "arch/arm/mach-gemini/Kconfig"
634 source "arch/arm/mach-integrator/Kconfig"
636 source "arch/arm/mach-iop32x/Kconfig"
638 source "arch/arm/mach-iop33x/Kconfig"
640 source "arch/arm/mach-iop13xx/Kconfig"
642 source "arch/arm/mach-ixp4xx/Kconfig"
644 source "arch/arm/mach-ixp2000/Kconfig"
646 source "arch/arm/mach-ixp23xx/Kconfig"
648 source "arch/arm/mach-loki/Kconfig"
650 source "arch/arm/mach-mv78xx0/Kconfig"
652 source "arch/arm/mach-pxa/Kconfig"
653 source "arch/arm/plat-pxa/Kconfig"
655 source "arch/arm/mach-mmp/Kconfig"
657 source "arch/arm/mach-sa1100/Kconfig"
659 source "arch/arm/plat-omap/Kconfig"
661 source "arch/arm/mach-omap1/Kconfig"
663 source "arch/arm/mach-omap2/Kconfig"
665 source "arch/arm/mach-orion5x/Kconfig"
667 source "arch/arm/mach-kirkwood/Kconfig"
669 source "arch/arm/plat-s3c24xx/Kconfig"
670 source "arch/arm/plat-s3c64xx/Kconfig"
671 source "arch/arm/plat-s3c/Kconfig"
674 source "arch/arm/mach-s3c2400/Kconfig"
675 source "arch/arm/mach-s3c2410/Kconfig"
676 source "arch/arm/mach-s3c2412/Kconfig"
677 source "arch/arm/mach-s3c2440/Kconfig"
678 source "arch/arm/mach-s3c2442/Kconfig"
679 source "arch/arm/mach-s3c2443/Kconfig"
683 source "arch/arm/mach-s3c6400/Kconfig"
684 source "arch/arm/mach-s3c6410/Kconfig"
687 source "arch/arm/mach-lh7a40x/Kconfig"
689 source "arch/arm/mach-imx/Kconfig"
691 source "arch/arm/mach-h720x/Kconfig"
693 source "arch/arm/mach-versatile/Kconfig"
695 source "arch/arm/mach-aaec2000/Kconfig"
697 source "arch/arm/mach-realview/Kconfig"
699 source "arch/arm/mach-at91/Kconfig"
701 source "arch/arm/plat-mxc/Kconfig"
703 source "arch/arm/mach-netx/Kconfig"
705 source "arch/arm/mach-ns9xxx/Kconfig"
707 source "arch/arm/mach-davinci/Kconfig"
709 source "arch/arm/mach-ks8695/Kconfig"
711 source "arch/arm/mach-msm/Kconfig"
713 source "arch/arm/mach-w90x900/Kconfig"
715 # Definitions to make life easier
728 source arch/arm/mm/Kconfig
731 bool "Enable iWMMXt support"
732 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
733 default y if PXA27x || PXA3xx || ARCH_MMP
735 Enable support for iWMMXt context switching at run time if
736 running on a CPU that supports it.
738 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
741 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
745 source "arch/arm/Kconfig-nommu"
748 config ARM_ERRATA_411920
749 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
750 depends on CPU_V6 && !SMP
752 Invalidation of the Instruction Cache operation can
753 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
754 It does not affect the MPCore. This option enables the ARM Ltd.
755 recommended workaround.
757 config ARM_ERRATA_430973
758 bool "ARM errata: Stale prediction on replaced interworking branch"
761 This option enables the workaround for the 430973 Cortex-A8
762 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
763 interworking branch is replaced with another code sequence at the
764 same virtual address, whether due to self-modifying code or virtual
765 to physical address re-mapping, Cortex-A8 does not recover from the
766 stale interworking branch prediction. This results in Cortex-A8
767 executing the new code sequence in the incorrect ARM or Thumb state.
768 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
769 and also flushes the branch target cache at every context switch.
770 Note that setting specific bits in the ACTLR register may not be
771 available in non-secure mode.
773 config ARM_ERRATA_458693
774 bool "ARM errata: Processor deadlock when a false hazard is created"
777 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
778 erratum. For very specific sequences of memory operations, it is
779 possible for a hazard condition intended for a cache line to instead
780 be incorrectly associated with a different cache line. This false
781 hazard might then cause a processor deadlock. The workaround enables
782 the L1 caching of the NEON accesses and disables the PLD instruction
783 in the ACTLR register. Note that setting specific bits in the ACTLR
784 register may not be available in non-secure mode.
786 config ARM_ERRATA_460075
787 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
790 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
791 erratum. Any asynchronous access to the L2 cache may encounter a
792 situation in which recent store transactions to the L2 cache are lost
793 and overwritten with stale memory contents from external memory. The
794 workaround disables the write-allocate mode for the L2 cache via the
795 ACTLR register. Note that setting specific bits in the ACTLR register
796 may not be available in non-secure mode.
800 source "arch/arm/common/Kconfig"
802 config FORCE_MAX_ZONEORDER
815 Find out whether you have ISA slots on your motherboard. ISA is the
816 name of a bus system, i.e. the way the CPU talks to the other stuff
817 inside your box. Other bus systems are PCI, EISA, MicroChannel
818 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
819 newer boards don't support it. If you have ISA, say Y, otherwise N.
821 # Select ISA DMA controller support
826 # Select ISA DMA interface
831 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
833 Find out whether you have a PCI motherboard. PCI is the name of a
834 bus system, i.e. the way the CPU talks to the other stuff inside
835 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
836 VESA. If you have PCI, say Y, otherwise N.
841 # Select the host bridge type
842 config PCI_HOST_VIA82C505
844 depends on PCI && ARCH_SHARK
847 config PCI_HOST_ITE8152
849 depends on PCI && MACH_ARMCORE
853 source "drivers/pci/Kconfig"
855 source "drivers/pcmcia/Kconfig"
859 menu "Kernel Features"
861 source "kernel/time/Kconfig"
864 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
865 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
866 select USE_GENERIC_SMP_HELPERS
868 This enables support for systems with more than one CPU. If you have
869 a system with only one CPU, like most personal computers, say N. If
870 you have a system with more than one CPU, say Y.
872 If you say N here, the kernel will run on single and multiprocessor
873 machines, but will use only one CPU of a multiprocessor machine. If
874 you say Y here, the kernel will run on many, but not all, single
875 processor machines. On a single processor machine, the kernel will
876 run faster if you say N here.
878 See also <file:Documentation/i386/IO-APIC.txt>,
879 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
880 <http://www.linuxdoc.org/docs.html#howto>.
882 If you don't know what to do here, say N.
885 prompt "Memory split"
888 Select the desired split between kernel and user memory.
890 If you are not absolutely sure what you are doing, leave this
894 bool "3G/1G user/kernel split"
896 bool "2G/2G user/kernel split"
898 bool "1G/3G user/kernel split"
903 default 0x40000000 if VMSPLIT_1G
904 default 0x80000000 if VMSPLIT_2G
908 int "Maximum number of CPUs (2-32)"
914 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
915 depends on SMP && HOTPLUG && EXPERIMENTAL
917 Say Y here to experiment with turning CPUs off and on. CPUs
918 can be controlled through /sys/devices/system/cpu.
921 bool "Use local timer interrupts"
922 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
925 Enable support for local timers on SMP platforms, rather then the
926 legacy IPI broadcast method. Local timers allows the system
927 accounting to be spread across the timer interval, preventing a
928 "thundering herd" at every timer tick.
931 bool "Preemptible Kernel (EXPERIMENTAL)"
932 depends on EXPERIMENTAL
934 This option reduces the latency of the kernel when reacting to
935 real-time or interactive events by allowing a low priority process to
936 be preempted even if it is in kernel mode executing a system call.
937 This allows applications to run more reliably even when the system is
940 Say Y here if you are building a kernel for a desktop, embedded
941 or real-time system. Say N if you are unsure.
945 default 128 if ARCH_L7200
946 default 200 if ARCH_EBSA110 || ARCH_S3C2410
947 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
948 default AT91_TIMER_HZ if ARCH_AT91
952 bool "Use the ARM EABI to compile the kernel"
954 This option allows for the kernel to be compiled using the latest
955 ARM ABI (aka EABI). This is only useful if you are using a user
956 space environment that is also compiled with EABI.
958 Since there are major incompatibilities between the legacy ABI and
959 EABI, especially with regard to structure member alignment, this
960 option also changes the kernel syscall calling convention to
961 disambiguate both ABIs and allow for backward compatibility support
962 (selected with CONFIG_OABI_COMPAT).
964 To use this you need GCC version 4.0.0 or later.
967 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
968 depends on AEABI && EXPERIMENTAL
971 This option preserves the old syscall interface along with the
972 new (ARM EABI) one. It also provides a compatibility layer to
973 intercept syscalls that have structure arguments which layout
974 in memory differs between the legacy ABI and the new ARM EABI
975 (only for non "thumb" binaries). This option adds a tiny
976 overhead to all syscalls and produces a slightly larger kernel.
977 If you know you'll be using only pure EABI user space then you
978 can say N here. If this option is not selected and you attempt
979 to execute a legacy ABI binary then the result will be
980 UNPREDICTABLE (in fact it can be predicted that it won't work
981 at all). If in doubt say Y.
983 config ARCH_HAS_HOLES_MEMORYMODEL
987 # Discontigmem is deprecated
988 config ARCH_DISCONTIGMEM_ENABLE
991 config ARCH_SPARSEMEM_ENABLE
994 config ARCH_SPARSEMEM_DEFAULT
995 def_bool ARCH_SPARSEMEM_ENABLE
997 config ARCH_SELECT_MEMORY_MODEL
998 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1002 default "4" if ARCH_LH7A40X
1004 depends on NEED_MULTIPLE_NODES
1007 bool "High Memory Support (EXPERIMENTAL)"
1008 depends on MMU && EXPERIMENTAL
1010 The address space of ARM processors is only 4 Gigabytes large
1011 and it has to accommodate user address space, kernel address
1012 space as well as some memory mapped IO. That means that, if you
1013 have a large amount of physical memory and/or IO, not all of the
1014 memory can be "permanently mapped" by the kernel. The physical
1015 memory that is not permanently mapped is called "high memory".
1017 Depending on the selected kernel/user memory split, minimum
1018 vmalloc space and actual amount of RAM, you may not need this
1019 option which should result in a slightly faster kernel.
1026 bool "Timer and CPU usage LEDs"
1027 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1028 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
1029 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1030 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1031 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1032 ARCH_AT91 || ARCH_DAVINCI || \
1033 ARCH_KS8695 || MACH_RD88F5182
1035 If you say Y here, the LEDs on your machine will be used
1036 to provide useful information about your current system status.
1038 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1039 be able to select which LEDs are active using the options below. If
1040 you are compiling a kernel for the EBSA-110 or the LART however, the
1041 red LED will simply flash regularly to indicate that the system is
1042 still functional. It is safe to say Y here if you have a CATS
1043 system, but the driver will do nothing.
1046 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1047 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1048 || MACH_OMAP_PERSEUS2
1050 depends on !GENERIC_CLOCKEVENTS
1051 default y if ARCH_EBSA110
1053 If you say Y here, one of the system LEDs (the green one on the
1054 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1055 will flash regularly to indicate that the system is still
1056 operational. This is mainly useful to kernel hackers who are
1057 debugging unstable kernels.
1059 The LART uses the same LED for both Timer LED and CPU usage LED
1060 functions. You may choose to use both, but the Timer LED function
1061 will overrule the CPU usage LED.
1064 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1066 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1067 || MACH_OMAP_PERSEUS2
1070 If you say Y here, the red LED will be used to give a good real
1071 time indication of CPU usage, by lighting whenever the idle task
1072 is not currently executing.
1074 The LART uses the same LED for both Timer LED and CPU usage LED
1075 functions. You may choose to use both, but the Timer LED function
1076 will overrule the CPU usage LED.
1078 config ALIGNMENT_TRAP
1080 depends on CPU_CP15_MMU
1081 default y if !ARCH_EBSA110
1083 ARM processors cannot fetch/store information which is not
1084 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1085 address divisible by 4. On 32-bit ARM processors, these non-aligned
1086 fetch/store instructions will be emulated in software if you say
1087 here, which has a severe performance impact. This is necessary for
1088 correct operation of some network protocols. With an IP-only
1089 configuration it is safe to say N, otherwise say Y.
1095 # Compressed boot loader in ROM. Yes, we really want to ask about
1096 # TEXT and BSS so we preserve their values in the config files.
1097 config ZBOOT_ROM_TEXT
1098 hex "Compressed ROM boot loader base address"
1101 The physical address at which the ROM-able zImage is to be
1102 placed in the target. Platforms which normally make use of
1103 ROM-able zImage formats normally set this to a suitable
1104 value in their defconfig file.
1106 If ZBOOT_ROM is not enabled, this has no effect.
1108 config ZBOOT_ROM_BSS
1109 hex "Compressed ROM boot loader BSS address"
1112 The base address of an area of read/write memory in the target
1113 for the ROM-able zImage which must be available while the
1114 decompressor is running. It must be large enough to hold the
1115 entire decompressed kernel plus an additional 128 KiB.
1116 Platforms which normally make use of ROM-able zImage formats
1117 normally set this to a suitable value in their defconfig file.
1119 If ZBOOT_ROM is not enabled, this has no effect.
1122 bool "Compressed boot loader in ROM/flash"
1123 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1125 Say Y here if you intend to execute your compressed kernel image
1126 (zImage) directly from ROM or flash. If unsure, say N.
1129 string "Default kernel command string"
1132 On some architectures (EBSA110 and CATS), there is currently no way
1133 for the boot loader to pass arguments to the kernel. For these
1134 architectures, you should supply some command-line options at build
1135 time by entering them here. As a minimum, you should specify the
1136 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1139 bool "Kernel Execute-In-Place from ROM"
1140 depends on !ZBOOT_ROM
1142 Execute-In-Place allows the kernel to run from non-volatile storage
1143 directly addressable by the CPU, such as NOR flash. This saves RAM
1144 space since the text section of the kernel is not loaded from flash
1145 to RAM. Read-write sections, such as the data section and stack,
1146 are still copied to RAM. The XIP kernel is not compressed since
1147 it has to run directly from flash, so it will take more space to
1148 store it. The flash address used to link the kernel object files,
1149 and for storing it, is configuration dependent. Therefore, if you
1150 say Y here, you must know the proper physical address where to
1151 store the kernel image depending on your own flash memory usage.
1153 Also note that the make target becomes "make xipImage" rather than
1154 "make zImage" or "make Image". The final kernel binary to put in
1155 ROM memory will be arch/arm/boot/xipImage.
1159 config XIP_PHYS_ADDR
1160 hex "XIP Kernel Physical Location"
1161 depends on XIP_KERNEL
1162 default "0x00080000"
1164 This is the physical address in your flash memory the kernel will
1165 be linked for and stored to. This address is dependent on your
1169 bool "Kexec system call (EXPERIMENTAL)"
1170 depends on EXPERIMENTAL
1172 kexec is a system call that implements the ability to shutdown your
1173 current kernel, and to start another kernel. It is like a reboot
1174 but it is independent of the system firmware. And like a reboot
1175 you can start any kernel with it, not just Linux.
1177 It is an ongoing process to be certain the hardware in a machine
1178 is properly shutdown, so do not be surprised if this code does not
1179 initially work for you. It may help to enable device hotplugging
1183 bool "Export atags in procfs"
1187 Should the atags used to boot the kernel be exported in an "atags"
1188 file in procfs. Useful with kexec.
1192 menu "CPU Power Management"
1194 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1196 source "drivers/cpufreq/Kconfig"
1198 config CPU_FREQ_SA1100
1200 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1203 config CPU_FREQ_SA1110
1205 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1208 config CPU_FREQ_INTEGRATOR
1209 tristate "CPUfreq driver for ARM Integrator CPUs"
1210 depends on ARCH_INTEGRATOR && CPU_FREQ
1213 This enables the CPUfreq driver for ARM Integrator CPUs.
1215 For details, take a look at <file:Documentation/cpu-freq>.
1220 tristate "CPUfreq driver for i.MX CPUs"
1221 depends on ARCH_IMX && CPU_FREQ
1224 This enables the CPUfreq driver for i.MX CPUs.
1230 source "drivers/cpuidle/Kconfig"
1234 menu "Floating point emulation"
1236 comment "At least one emulation must be selected"
1239 bool "NWFPE math emulation"
1240 depends on !AEABI || OABI_COMPAT
1242 Say Y to include the NWFPE floating point emulator in the kernel.
1243 This is necessary to run most binaries. Linux does not currently
1244 support floating point hardware so you need to say Y here even if
1245 your machine has an FPA or floating point co-processor podule.
1247 You may say N here if you are going to load the Acorn FPEmulator
1248 early in the bootup.
1251 bool "Support extended precision"
1252 depends on FPE_NWFPE
1254 Say Y to include 80-bit support in the kernel floating-point
1255 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1256 Note that gcc does not generate 80-bit operations by default,
1257 so in most cases this option only enlarges the size of the
1258 floating point emulator without any good reason.
1260 You almost surely want to say N here.
1263 bool "FastFPE math emulation (EXPERIMENTAL)"
1264 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1266 Say Y here to include the FAST floating point emulator in the kernel.
1267 This is an experimental much faster emulator which now also has full
1268 precision for the mantissa. It does not support any exceptions.
1269 It is very simple, and approximately 3-6 times faster than NWFPE.
1271 It should be sufficient for most programs. It may be not suitable
1272 for scientific calculations, but you have to check this for yourself.
1273 If you do not feel you need a faster FP emulation you should better
1277 bool "VFP-format floating point maths"
1278 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1280 Say Y to include VFP support code in the kernel. This is needed
1281 if your hardware includes a VFP unit.
1283 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1284 release notes and additional status information.
1286 Say N if your target does not have VFP hardware.
1294 bool "Advanced SIMD (NEON) Extension support"
1295 depends on VFPv3 && CPU_V7
1297 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1302 menu "Userspace binary formats"
1304 source "fs/Kconfig.binfmt"
1307 tristate "RISC OS personality"
1310 Say Y here to include the kernel code necessary if you want to run
1311 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1312 experimental; if this sounds frightening, say N and sleep in peace.
1313 You can also say M here to compile this support as a module (which
1314 will be called arthur).
1318 menu "Power management options"
1320 source "kernel/power/Kconfig"
1322 config ARCH_SUSPEND_POSSIBLE
1327 source "net/Kconfig"
1329 menu "Device Drivers"
1331 source "drivers/base/Kconfig"
1333 source "drivers/connector/Kconfig"
1335 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1336 source "drivers/mtd/Kconfig"
1339 source "drivers/parport/Kconfig"
1341 source "drivers/pnp/Kconfig"
1343 source "drivers/block/Kconfig"
1345 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1347 source "drivers/misc/Kconfig"
1349 source "drivers/ide/Kconfig"
1351 source "drivers/scsi/Kconfig"
1353 source "drivers/ata/Kconfig"
1355 source "drivers/md/Kconfig"
1357 source "drivers/message/fusion/Kconfig"
1359 source "drivers/ieee1394/Kconfig"
1361 source "drivers/message/i2o/Kconfig"
1363 source "drivers/net/Kconfig"
1365 source "drivers/isdn/Kconfig"
1367 # input before char - char/joystick depends on it. As does USB.
1369 source "drivers/input/Kconfig"
1371 source "drivers/char/Kconfig"
1373 source "drivers/i2c/Kconfig"
1375 source "drivers/spi/Kconfig"
1377 source "drivers/gpio/Kconfig"
1379 source "drivers/w1/Kconfig"
1381 source "drivers/power/Kconfig"
1383 source "drivers/hwmon/Kconfig"
1385 source "drivers/thermal/Kconfig"
1387 source "drivers/watchdog/Kconfig"
1389 source "drivers/ssb/Kconfig"
1391 #source "drivers/l3/Kconfig"
1393 source "drivers/mfd/Kconfig"
1395 source "drivers/media/Kconfig"
1397 source "drivers/video/Kconfig"
1399 source "sound/Kconfig"
1401 source "drivers/hid/Kconfig"
1403 source "drivers/usb/Kconfig"
1405 source "drivers/uwb/Kconfig"
1407 source "drivers/mmc/Kconfig"
1409 source "drivers/memstick/Kconfig"
1411 source "drivers/accessibility/Kconfig"
1413 source "drivers/leds/Kconfig"
1415 source "drivers/rtc/Kconfig"
1417 source "drivers/dma/Kconfig"
1419 source "drivers/dca/Kconfig"
1421 source "drivers/auxdisplay/Kconfig"
1423 source "drivers/regulator/Kconfig"
1425 source "drivers/uio/Kconfig"
1427 source "drivers/staging/Kconfig"
1433 source "arch/arm/Kconfig.debug"
1435 source "security/Kconfig"
1437 source "crypto/Kconfig"
1439 source "lib/Kconfig"