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
277 This enables support for the Cirrus EP93xx series of CPUs.
280 bool "Cortina Systems Gemini"
283 select ARCH_REQUIRE_GPIOLIB
285 Support for the Cortina Systems Gemini family SoCs
287 config ARCH_FOOTBRIDGE
292 Support for systems based on the DC21285 companion chip
293 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
296 bool "Hilscher NetX based"
299 select GENERIC_CLOCKEVENTS
302 This enables support for systems based on the Hilscher NetX Soc
305 bool "Hynix HMS720x-based"
309 This enables support for systems based on the Hynix HMS720x
316 select GENERIC_CLOCKEVENTS
318 Support for Motorola's i.MX family of processors (MX1, MXL).
326 select ARCH_SUPPORTS_MSI
329 Support for Intel's IOP13XX (XScale) family of processors.
338 select ARCH_REQUIRE_GPIOLIB
340 Support for Intel's 80219 and IOP32X (XScale) family of
350 select ARCH_REQUIRE_GPIOLIB
352 Support for Intel's IOP33X (XScale) family of processors.
360 Support for Intel's IXP23xx (XScale) family of processors.
363 bool "IXP2400/2800-based"
368 Support for Intel's IXP2400/2800 (XScale) family of processors.
376 select GENERIC_CLOCKEVENTS
377 select DMABOUNCE if PCI
379 Support for Intel's IXP4XX (XScale) family of processors.
386 Say Y here if you intend to run this kernel on a LinkUp Systems
387 L7200 Software Development Board which uses an ARM720T processor.
388 Information on this board can be obtained at:
390 <http://www.linkupsys.com/>
392 If you have any questions or comments about the Linux kernel port
393 to this board, send e-mail to <sjhill@cotw.com>.
396 bool "Marvell Kirkwood"
401 select GENERIC_CLOCKEVENTS
404 Support for the following Marvell Kirkwood series SoCs:
405 88F6180, 88F6192 and 88F6281.
408 bool "Micrel/Kendin KS8695"
411 select ARCH_REQUIRE_GPIOLIB
413 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
414 System-on-Chip devices.
417 bool "NetSilicon NS9xxx"
421 select GENERIC_CLOCKEVENTS
424 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
427 <http://www.digi.com/products/microprocessors/index.jsp>
430 bool "Marvell Loki (88RC8480)"
433 select GENERIC_CLOCKEVENTS
436 Support for the Marvell Loki (88RC8480) SoC.
439 bool "Marvell MV78xx0"
444 select GENERIC_CLOCKEVENTS
447 Support for the following Marvell MV78xx0 series SoCs:
451 bool "Freescale MXC/iMX-based"
453 select GENERIC_CLOCKEVENTS
456 select ARCH_REQUIRE_GPIOLIB
458 Support for Freescale MXC/iMX-based family of processors
467 select GENERIC_CLOCKEVENTS
470 Support for the following Marvell Orion 5x series SoCs:
471 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
472 Orion-2 (5281), Orion-1-90 (6183).
475 bool "Philips Nexperia PNX4008 Mobile"
479 This enables support for Philips PNX4008 mobile platform.
482 bool "PXA2xx/PXA3xx-based"
488 select ARCH_REQUIRE_GPIOLIB
492 select GENERIC_CLOCKEVENTS
496 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
499 bool "Marvell PXA168/910"
502 select ARCH_REQUIRE_GPIOLIB
506 select GENERIC_CLOCKEVENTS
510 Support for Marvell's PXA168/910 processor line.
517 select ARCH_MAY_HAVE_PC_FDC
518 select HAVE_PATA_PLATFORM
521 select ARCH_SPARSEMEM_ENABLE
523 On the Acorn Risc-PC, Linux can support the internal IDE disk and
524 CD-ROM interface, serial and parallel port, and the floppy drive.
530 select ARCH_SPARSEMEM_ENABLE
534 select GENERIC_CLOCKEVENTS
537 select ARCH_REQUIRE_GPIOLIB
539 Support for StrongARM 11x0 based boards.
542 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
546 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
547 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
548 the Samsung SMDK2410 development board (and derivatives).
551 bool "Samsung S3C64XX"
555 Samsung S3C64XX series based systems
565 Support for the StrongARM based Digital DNARD machine, also known
566 as "Shark" (<http://www.shark-linux.de/shark.html>).
571 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
572 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
574 Say Y here for systems based on one of the Sharp LH7A40X
575 System on a Chip processors. These CPUs include an ARM922T
576 core with a wide array of integrated devices for
577 hand-held and low-power applications.
583 select GENERIC_CLOCKEVENTS
585 select ARCH_REQUIRE_GPIOLIB
590 Support for TI's DaVinci platform.
596 select ARCH_REQUIRE_GPIOLIB
598 select GENERIC_CLOCKEVENTS
600 Support for TI's OMAP platform (OMAP1 and OMAP2).
606 select GENERIC_CLOCKEVENTS
608 Support for Qualcomm MSM7K based systems. This runs on the ARM11
609 apps processor of the MSM7K and depends on a shared memory
610 interface to the ARM9 modem processor which runs the baseband stack
611 and controls some vital subsystems (clock and power control, etc).
614 bool "Nuvoton W90X900 CPU"
617 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
618 can login www.mcuos.com or www.nuvoton.com to know more.
622 source "arch/arm/mach-clps711x/Kconfig"
624 source "arch/arm/mach-ep93xx/Kconfig"
626 source "arch/arm/mach-footbridge/Kconfig"
628 source "arch/arm/mach-gemini/Kconfig"
630 source "arch/arm/mach-integrator/Kconfig"
632 source "arch/arm/mach-iop32x/Kconfig"
634 source "arch/arm/mach-iop33x/Kconfig"
636 source "arch/arm/mach-iop13xx/Kconfig"
638 source "arch/arm/mach-ixp4xx/Kconfig"
640 source "arch/arm/mach-ixp2000/Kconfig"
642 source "arch/arm/mach-ixp23xx/Kconfig"
644 source "arch/arm/mach-loki/Kconfig"
646 source "arch/arm/mach-mv78xx0/Kconfig"
648 source "arch/arm/mach-pxa/Kconfig"
649 source "arch/arm/plat-pxa/Kconfig"
651 source "arch/arm/mach-mmp/Kconfig"
653 source "arch/arm/mach-sa1100/Kconfig"
655 source "arch/arm/plat-omap/Kconfig"
657 source "arch/arm/mach-omap1/Kconfig"
659 source "arch/arm/mach-omap2/Kconfig"
661 source "arch/arm/mach-orion5x/Kconfig"
663 source "arch/arm/mach-kirkwood/Kconfig"
665 source "arch/arm/plat-s3c24xx/Kconfig"
666 source "arch/arm/plat-s3c64xx/Kconfig"
667 source "arch/arm/plat-s3c/Kconfig"
670 source "arch/arm/mach-s3c2400/Kconfig"
671 source "arch/arm/mach-s3c2410/Kconfig"
672 source "arch/arm/mach-s3c2412/Kconfig"
673 source "arch/arm/mach-s3c2440/Kconfig"
674 source "arch/arm/mach-s3c2442/Kconfig"
675 source "arch/arm/mach-s3c2443/Kconfig"
679 source "arch/arm/mach-s3c6400/Kconfig"
680 source "arch/arm/mach-s3c6410/Kconfig"
683 source "arch/arm/mach-lh7a40x/Kconfig"
685 source "arch/arm/mach-imx/Kconfig"
687 source "arch/arm/mach-h720x/Kconfig"
689 source "arch/arm/mach-versatile/Kconfig"
691 source "arch/arm/mach-aaec2000/Kconfig"
693 source "arch/arm/mach-realview/Kconfig"
695 source "arch/arm/mach-at91/Kconfig"
697 source "arch/arm/plat-mxc/Kconfig"
699 source "arch/arm/mach-netx/Kconfig"
701 source "arch/arm/mach-ns9xxx/Kconfig"
703 source "arch/arm/mach-davinci/Kconfig"
705 source "arch/arm/mach-ks8695/Kconfig"
707 source "arch/arm/mach-msm/Kconfig"
709 source "arch/arm/mach-w90x900/Kconfig"
711 # Definitions to make life easier
724 source arch/arm/mm/Kconfig
727 bool "Enable iWMMXt support"
728 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
729 default y if PXA27x || PXA3xx || ARCH_MMP
731 Enable support for iWMMXt context switching at run time if
732 running on a CPU that supports it.
734 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
737 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
741 source "arch/arm/Kconfig-nommu"
746 source "arch/arm/common/Kconfig"
748 config FORCE_MAX_ZONEORDER
761 Find out whether you have ISA slots on your motherboard. ISA is the
762 name of a bus system, i.e. the way the CPU talks to the other stuff
763 inside your box. Other bus systems are PCI, EISA, MicroChannel
764 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
765 newer boards don't support it. If you have ISA, say Y, otherwise N.
767 # Select ISA DMA controller support
772 # Select ISA DMA interface
777 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
779 Find out whether you have a PCI motherboard. PCI is the name of a
780 bus system, i.e. the way the CPU talks to the other stuff inside
781 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
782 VESA. If you have PCI, say Y, otherwise N.
787 # Select the host bridge type
788 config PCI_HOST_VIA82C505
790 depends on PCI && ARCH_SHARK
793 config PCI_HOST_ITE8152
795 depends on PCI && MACH_ARMCORE
799 source "drivers/pci/Kconfig"
801 source "drivers/pcmcia/Kconfig"
805 menu "Kernel Features"
807 source "kernel/time/Kconfig"
810 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
811 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
812 select USE_GENERIC_SMP_HELPERS
814 This enables support for systems with more than one CPU. If you have
815 a system with only one CPU, like most personal computers, say N. If
816 you have a system with more than one CPU, say Y.
818 If you say N here, the kernel will run on single and multiprocessor
819 machines, but will use only one CPU of a multiprocessor machine. If
820 you say Y here, the kernel will run on many, but not all, single
821 processor machines. On a single processor machine, the kernel will
822 run faster if you say N here.
824 See also <file:Documentation/i386/IO-APIC.txt>,
825 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
826 <http://www.linuxdoc.org/docs.html#howto>.
828 If you don't know what to do here, say N.
831 prompt "Memory split"
834 Select the desired split between kernel and user memory.
836 If you are not absolutely sure what you are doing, leave this
840 bool "3G/1G user/kernel split"
842 bool "2G/2G user/kernel split"
844 bool "1G/3G user/kernel split"
849 default 0x40000000 if VMSPLIT_1G
850 default 0x80000000 if VMSPLIT_2G
854 int "Maximum number of CPUs (2-32)"
860 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
861 depends on SMP && HOTPLUG && EXPERIMENTAL
863 Say Y here to experiment with turning CPUs off and on. CPUs
864 can be controlled through /sys/devices/system/cpu.
867 bool "Use local timer interrupts"
868 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
871 Enable support for local timers on SMP platforms, rather then the
872 legacy IPI broadcast method. Local timers allows the system
873 accounting to be spread across the timer interval, preventing a
874 "thundering herd" at every timer tick.
877 bool "Preemptible Kernel (EXPERIMENTAL)"
878 depends on EXPERIMENTAL
880 This option reduces the latency of the kernel when reacting to
881 real-time or interactive events by allowing a low priority process to
882 be preempted even if it is in kernel mode executing a system call.
883 This allows applications to run more reliably even when the system is
886 Say Y here if you are building a kernel for a desktop, embedded
887 or real-time system. Say N if you are unsure.
891 default 128 if ARCH_L7200
892 default 200 if ARCH_EBSA110 || ARCH_S3C2410
893 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
894 default AT91_TIMER_HZ if ARCH_AT91
898 bool "Use the ARM EABI to compile the kernel"
900 This option allows for the kernel to be compiled using the latest
901 ARM ABI (aka EABI). This is only useful if you are using a user
902 space environment that is also compiled with EABI.
904 Since there are major incompatibilities between the legacy ABI and
905 EABI, especially with regard to structure member alignment, this
906 option also changes the kernel syscall calling convention to
907 disambiguate both ABIs and allow for backward compatibility support
908 (selected with CONFIG_OABI_COMPAT).
910 To use this you need GCC version 4.0.0 or later.
913 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
914 depends on AEABI && EXPERIMENTAL
917 This option preserves the old syscall interface along with the
918 new (ARM EABI) one. It also provides a compatibility layer to
919 intercept syscalls that have structure arguments which layout
920 in memory differs between the legacy ABI and the new ARM EABI
921 (only for non "thumb" binaries). This option adds a tiny
922 overhead to all syscalls and produces a slightly larger kernel.
923 If you know you'll be using only pure EABI user space then you
924 can say N here. If this option is not selected and you attempt
925 to execute a legacy ABI binary then the result will be
926 UNPREDICTABLE (in fact it can be predicted that it won't work
927 at all). If in doubt say Y.
929 config ARCH_FLATMEM_HAS_HOLES
934 # Discontigmem is deprecated
935 config ARCH_DISCONTIGMEM_ENABLE
938 config ARCH_SPARSEMEM_ENABLE
941 config ARCH_SPARSEMEM_DEFAULT
942 def_bool ARCH_SPARSEMEM_ENABLE
944 config ARCH_SELECT_MEMORY_MODEL
945 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
949 default "4" if ARCH_LH7A40X
951 depends on NEED_MULTIPLE_NODES
954 bool "High Memory Support (EXPERIMENTAL)"
955 depends on MMU && EXPERIMENTAL
957 The address space of ARM processors is only 4 Gigabytes large
958 and it has to accommodate user address space, kernel address
959 space as well as some memory mapped IO. That means that, if you
960 have a large amount of physical memory and/or IO, not all of the
961 memory can be "permanently mapped" by the kernel. The physical
962 memory that is not permanently mapped is called "high memory".
964 Depending on the selected kernel/user memory split, minimum
965 vmalloc space and actual amount of RAM, you may not need this
966 option which should result in a slightly faster kernel.
973 bool "Timer and CPU usage LEDs"
974 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
975 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
976 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
977 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
978 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
979 ARCH_AT91 || ARCH_DAVINCI || \
980 ARCH_KS8695 || MACH_RD88F5182
982 If you say Y here, the LEDs on your machine will be used
983 to provide useful information about your current system status.
985 If you are compiling a kernel for a NetWinder or EBSA-285, you will
986 be able to select which LEDs are active using the options below. If
987 you are compiling a kernel for the EBSA-110 or the LART however, the
988 red LED will simply flash regularly to indicate that the system is
989 still functional. It is safe to say Y here if you have a CATS
990 system, but the driver will do nothing.
993 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
994 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
995 || MACH_OMAP_PERSEUS2
997 depends on !GENERIC_CLOCKEVENTS
998 default y if ARCH_EBSA110
1000 If you say Y here, one of the system LEDs (the green one on the
1001 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1002 will flash regularly to indicate that the system is still
1003 operational. This is mainly useful to kernel hackers who are
1004 debugging unstable kernels.
1006 The LART uses the same LED for both Timer LED and CPU usage LED
1007 functions. You may choose to use both, but the Timer LED function
1008 will overrule the CPU usage LED.
1011 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1013 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1014 || MACH_OMAP_PERSEUS2
1017 If you say Y here, the red LED will be used to give a good real
1018 time indication of CPU usage, by lighting whenever the idle task
1019 is not currently executing.
1021 The LART uses the same LED for both Timer LED and CPU usage LED
1022 functions. You may choose to use both, but the Timer LED function
1023 will overrule the CPU usage LED.
1025 config ALIGNMENT_TRAP
1027 depends on CPU_CP15_MMU
1028 default y if !ARCH_EBSA110
1030 ARM processors cannot fetch/store information which is not
1031 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1032 address divisible by 4. On 32-bit ARM processors, these non-aligned
1033 fetch/store instructions will be emulated in software if you say
1034 here, which has a severe performance impact. This is necessary for
1035 correct operation of some network protocols. With an IP-only
1036 configuration it is safe to say N, otherwise say Y.
1042 # Compressed boot loader in ROM. Yes, we really want to ask about
1043 # TEXT and BSS so we preserve their values in the config files.
1044 config ZBOOT_ROM_TEXT
1045 hex "Compressed ROM boot loader base address"
1048 The physical address at which the ROM-able zImage is to be
1049 placed in the target. Platforms which normally make use of
1050 ROM-able zImage formats normally set this to a suitable
1051 value in their defconfig file.
1053 If ZBOOT_ROM is not enabled, this has no effect.
1055 config ZBOOT_ROM_BSS
1056 hex "Compressed ROM boot loader BSS address"
1059 The base address of an area of read/write memory in the target
1060 for the ROM-able zImage which must be available while the
1061 decompressor is running. It must be large enough to hold the
1062 entire decompressed kernel plus an additional 128 KiB.
1063 Platforms which normally make use of ROM-able zImage formats
1064 normally set this to a suitable value in their defconfig file.
1066 If ZBOOT_ROM is not enabled, this has no effect.
1069 bool "Compressed boot loader in ROM/flash"
1070 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1072 Say Y here if you intend to execute your compressed kernel image
1073 (zImage) directly from ROM or flash. If unsure, say N.
1076 string "Default kernel command string"
1079 On some architectures (EBSA110 and CATS), there is currently no way
1080 for the boot loader to pass arguments to the kernel. For these
1081 architectures, you should supply some command-line options at build
1082 time by entering them here. As a minimum, you should specify the
1083 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1086 bool "Kernel Execute-In-Place from ROM"
1087 depends on !ZBOOT_ROM
1089 Execute-In-Place allows the kernel to run from non-volatile storage
1090 directly addressable by the CPU, such as NOR flash. This saves RAM
1091 space since the text section of the kernel is not loaded from flash
1092 to RAM. Read-write sections, such as the data section and stack,
1093 are still copied to RAM. The XIP kernel is not compressed since
1094 it has to run directly from flash, so it will take more space to
1095 store it. The flash address used to link the kernel object files,
1096 and for storing it, is configuration dependent. Therefore, if you
1097 say Y here, you must know the proper physical address where to
1098 store the kernel image depending on your own flash memory usage.
1100 Also note that the make target becomes "make xipImage" rather than
1101 "make zImage" or "make Image". The final kernel binary to put in
1102 ROM memory will be arch/arm/boot/xipImage.
1106 config XIP_PHYS_ADDR
1107 hex "XIP Kernel Physical Location"
1108 depends on XIP_KERNEL
1109 default "0x00080000"
1111 This is the physical address in your flash memory the kernel will
1112 be linked for and stored to. This address is dependent on your
1116 bool "Kexec system call (EXPERIMENTAL)"
1117 depends on EXPERIMENTAL
1119 kexec is a system call that implements the ability to shutdown your
1120 current kernel, and to start another kernel. It is like a reboot
1121 but it is independent of the system firmware. And like a reboot
1122 you can start any kernel with it, not just Linux.
1124 It is an ongoing process to be certain the hardware in a machine
1125 is properly shutdown, so do not be surprised if this code does not
1126 initially work for you. It may help to enable device hotplugging
1130 bool "Export atags in procfs"
1134 Should the atags used to boot the kernel be exported in an "atags"
1135 file in procfs. Useful with kexec.
1139 menu "CPU Power Management"
1141 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1143 source "drivers/cpufreq/Kconfig"
1145 config CPU_FREQ_SA1100
1147 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1150 config CPU_FREQ_SA1110
1152 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1155 config CPU_FREQ_INTEGRATOR
1156 tristate "CPUfreq driver for ARM Integrator CPUs"
1157 depends on ARCH_INTEGRATOR && CPU_FREQ
1160 This enables the CPUfreq driver for ARM Integrator CPUs.
1162 For details, take a look at <file:Documentation/cpu-freq>.
1167 tristate "CPUfreq driver for i.MX CPUs"
1168 depends on ARCH_IMX && CPU_FREQ
1171 This enables the CPUfreq driver for i.MX CPUs.
1177 depends on CPU_FREQ && ARCH_PXA && PXA25x
1179 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1183 source "drivers/cpuidle/Kconfig"
1187 menu "Floating point emulation"
1189 comment "At least one emulation must be selected"
1192 bool "NWFPE math emulation"
1193 depends on !AEABI || OABI_COMPAT
1195 Say Y to include the NWFPE floating point emulator in the kernel.
1196 This is necessary to run most binaries. Linux does not currently
1197 support floating point hardware so you need to say Y here even if
1198 your machine has an FPA or floating point co-processor podule.
1200 You may say N here if you are going to load the Acorn FPEmulator
1201 early in the bootup.
1204 bool "Support extended precision"
1205 depends on FPE_NWFPE
1207 Say Y to include 80-bit support in the kernel floating-point
1208 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1209 Note that gcc does not generate 80-bit operations by default,
1210 so in most cases this option only enlarges the size of the
1211 floating point emulator without any good reason.
1213 You almost surely want to say N here.
1216 bool "FastFPE math emulation (EXPERIMENTAL)"
1217 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1219 Say Y here to include the FAST floating point emulator in the kernel.
1220 This is an experimental much faster emulator which now also has full
1221 precision for the mantissa. It does not support any exceptions.
1222 It is very simple, and approximately 3-6 times faster than NWFPE.
1224 It should be sufficient for most programs. It may be not suitable
1225 for scientific calculations, but you have to check this for yourself.
1226 If you do not feel you need a faster FP emulation you should better
1230 bool "VFP-format floating point maths"
1231 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1233 Say Y to include VFP support code in the kernel. This is needed
1234 if your hardware includes a VFP unit.
1236 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1237 release notes and additional status information.
1239 Say N if your target does not have VFP hardware.
1247 bool "Advanced SIMD (NEON) Extension support"
1248 depends on VFPv3 && CPU_V7
1250 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1255 menu "Userspace binary formats"
1257 source "fs/Kconfig.binfmt"
1260 tristate "RISC OS personality"
1263 Say Y here to include the kernel code necessary if you want to run
1264 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1265 experimental; if this sounds frightening, say N and sleep in peace.
1266 You can also say M here to compile this support as a module (which
1267 will be called arthur).
1271 menu "Power management options"
1273 source "kernel/power/Kconfig"
1275 config ARCH_SUSPEND_POSSIBLE
1280 source "net/Kconfig"
1282 menu "Device Drivers"
1284 source "drivers/base/Kconfig"
1286 source "drivers/connector/Kconfig"
1288 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1289 source "drivers/mtd/Kconfig"
1292 source "drivers/parport/Kconfig"
1294 source "drivers/pnp/Kconfig"
1296 source "drivers/block/Kconfig"
1298 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1300 source "drivers/misc/Kconfig"
1302 source "drivers/ide/Kconfig"
1304 source "drivers/scsi/Kconfig"
1306 source "drivers/ata/Kconfig"
1308 source "drivers/md/Kconfig"
1310 source "drivers/message/fusion/Kconfig"
1312 source "drivers/ieee1394/Kconfig"
1314 source "drivers/message/i2o/Kconfig"
1316 source "drivers/net/Kconfig"
1318 source "drivers/isdn/Kconfig"
1320 # input before char - char/joystick depends on it. As does USB.
1322 source "drivers/input/Kconfig"
1324 source "drivers/char/Kconfig"
1326 source "drivers/i2c/Kconfig"
1328 source "drivers/spi/Kconfig"
1330 source "drivers/gpio/Kconfig"
1332 source "drivers/w1/Kconfig"
1334 source "drivers/power/Kconfig"
1336 source "drivers/hwmon/Kconfig"
1338 source "drivers/thermal/Kconfig"
1340 source "drivers/watchdog/Kconfig"
1342 source "drivers/ssb/Kconfig"
1344 #source "drivers/l3/Kconfig"
1346 source "drivers/mfd/Kconfig"
1348 source "drivers/media/Kconfig"
1350 source "drivers/video/Kconfig"
1352 source "sound/Kconfig"
1354 source "drivers/hid/Kconfig"
1356 source "drivers/usb/Kconfig"
1358 source "drivers/uwb/Kconfig"
1360 source "drivers/mmc/Kconfig"
1362 source "drivers/memstick/Kconfig"
1364 source "drivers/accessibility/Kconfig"
1366 source "drivers/leds/Kconfig"
1368 source "drivers/rtc/Kconfig"
1370 source "drivers/dma/Kconfig"
1372 source "drivers/dca/Kconfig"
1374 source "drivers/auxdisplay/Kconfig"
1376 source "drivers/regulator/Kconfig"
1378 source "drivers/uio/Kconfig"
1380 source "drivers/staging/Kconfig"
1386 source "arch/arm/Kconfig.debug"
1388 source "security/Kconfig"
1390 source "crypto/Kconfig"
1392 source "lib/Kconfig"