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
490 select GENERIC_CLOCKEVENTS
494 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
497 bool "Marvell PXA168/910"
500 select ARCH_REQUIRE_GPIOLIB
504 select GENERIC_CLOCKEVENTS
508 Support for Marvell's PXA168/910 processor line.
515 select ARCH_MAY_HAVE_PC_FDC
516 select HAVE_PATA_PLATFORM
519 select ARCH_SPARSEMEM_ENABLE
521 On the Acorn Risc-PC, Linux can support the internal IDE disk and
522 CD-ROM interface, serial and parallel port, and the floppy drive.
528 select ARCH_SPARSEMEM_ENABLE
532 select GENERIC_CLOCKEVENTS
535 select ARCH_REQUIRE_GPIOLIB
537 Support for StrongARM 11x0 based boards.
540 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
544 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
545 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
546 the Samsung SMDK2410 development board (and derivatives).
549 bool "Samsung S3C64XX"
553 Samsung S3C64XX series based systems
563 Support for the StrongARM based Digital DNARD machine, also known
564 as "Shark" (<http://www.shark-linux.de/shark.html>).
569 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
570 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
572 Say Y here for systems based on one of the Sharp LH7A40X
573 System on a Chip processors. These CPUs include an ARM922T
574 core with a wide array of integrated devices for
575 hand-held and low-power applications.
581 select GENERIC_CLOCKEVENTS
583 select ARCH_REQUIRE_GPIOLIB
587 Support for TI's DaVinci platform.
593 select ARCH_REQUIRE_GPIOLIB
595 select GENERIC_CLOCKEVENTS
597 Support for TI's OMAP platform (OMAP1 and OMAP2).
603 select GENERIC_CLOCKEVENTS
605 Support for Qualcomm MSM7K based systems. This runs on the ARM11
606 apps processor of the MSM7K and depends on a shared memory
607 interface to the ARM9 modem processor which runs the baseband stack
608 and controls some vital subsystems (clock and power control, etc).
611 bool "Nuvoton W90X900 CPU"
614 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
615 can login www.mcuos.com or www.nuvoton.com to know more.
619 source "arch/arm/mach-clps711x/Kconfig"
621 source "arch/arm/mach-ep93xx/Kconfig"
623 source "arch/arm/mach-footbridge/Kconfig"
625 source "arch/arm/mach-gemini/Kconfig"
627 source "arch/arm/mach-integrator/Kconfig"
629 source "arch/arm/mach-iop32x/Kconfig"
631 source "arch/arm/mach-iop33x/Kconfig"
633 source "arch/arm/mach-iop13xx/Kconfig"
635 source "arch/arm/mach-ixp4xx/Kconfig"
637 source "arch/arm/mach-ixp2000/Kconfig"
639 source "arch/arm/mach-ixp23xx/Kconfig"
641 source "arch/arm/mach-loki/Kconfig"
643 source "arch/arm/mach-mv78xx0/Kconfig"
645 source "arch/arm/mach-pxa/Kconfig"
646 source "arch/arm/plat-pxa/Kconfig"
648 source "arch/arm/mach-mmp/Kconfig"
650 source "arch/arm/mach-sa1100/Kconfig"
652 source "arch/arm/plat-omap/Kconfig"
654 source "arch/arm/mach-omap1/Kconfig"
656 source "arch/arm/mach-omap2/Kconfig"
658 source "arch/arm/mach-orion5x/Kconfig"
660 source "arch/arm/mach-kirkwood/Kconfig"
662 source "arch/arm/plat-s3c24xx/Kconfig"
663 source "arch/arm/plat-s3c64xx/Kconfig"
664 source "arch/arm/plat-s3c/Kconfig"
667 source "arch/arm/mach-s3c2400/Kconfig"
668 source "arch/arm/mach-s3c2410/Kconfig"
669 source "arch/arm/mach-s3c2412/Kconfig"
670 source "arch/arm/mach-s3c2440/Kconfig"
671 source "arch/arm/mach-s3c2442/Kconfig"
672 source "arch/arm/mach-s3c2443/Kconfig"
676 source "arch/arm/mach-s3c6400/Kconfig"
677 source "arch/arm/mach-s3c6410/Kconfig"
680 source "arch/arm/mach-lh7a40x/Kconfig"
682 source "arch/arm/mach-imx/Kconfig"
684 source "arch/arm/mach-h720x/Kconfig"
686 source "arch/arm/mach-versatile/Kconfig"
688 source "arch/arm/mach-aaec2000/Kconfig"
690 source "arch/arm/mach-realview/Kconfig"
692 source "arch/arm/mach-at91/Kconfig"
694 source "arch/arm/plat-mxc/Kconfig"
696 source "arch/arm/mach-netx/Kconfig"
698 source "arch/arm/mach-ns9xxx/Kconfig"
700 source "arch/arm/mach-davinci/Kconfig"
702 source "arch/arm/mach-ks8695/Kconfig"
704 source "arch/arm/mach-msm/Kconfig"
706 source "arch/arm/mach-w90x900/Kconfig"
708 # Definitions to make life easier
721 source arch/arm/mm/Kconfig
724 bool "Enable iWMMXt support"
725 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
726 default y if PXA27x || PXA3xx || ARCH_MMP
728 Enable support for iWMMXt context switching at run time if
729 running on a CPU that supports it.
731 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
734 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
738 source "arch/arm/Kconfig-nommu"
743 source "arch/arm/common/Kconfig"
745 config FORCE_MAX_ZONEORDER
758 Find out whether you have ISA slots on your motherboard. ISA is the
759 name of a bus system, i.e. the way the CPU talks to the other stuff
760 inside your box. Other bus systems are PCI, EISA, MicroChannel
761 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
762 newer boards don't support it. If you have ISA, say Y, otherwise N.
764 # Select ISA DMA controller support
769 # Select ISA DMA interface
774 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
776 Find out whether you have a PCI motherboard. PCI is the name of a
777 bus system, i.e. the way the CPU talks to the other stuff inside
778 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
779 VESA. If you have PCI, say Y, otherwise N.
784 # Select the host bridge type
785 config PCI_HOST_VIA82C505
787 depends on PCI && ARCH_SHARK
790 config PCI_HOST_ITE8152
792 depends on PCI && MACH_ARMCORE
796 source "drivers/pci/Kconfig"
798 source "drivers/pcmcia/Kconfig"
802 menu "Kernel Features"
804 source "kernel/time/Kconfig"
807 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
808 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
809 select USE_GENERIC_SMP_HELPERS
811 This enables support for systems with more than one CPU. If you have
812 a system with only one CPU, like most personal computers, say N. If
813 you have a system with more than one CPU, say Y.
815 If you say N here, the kernel will run on single and multiprocessor
816 machines, but will use only one CPU of a multiprocessor machine. If
817 you say Y here, the kernel will run on many, but not all, single
818 processor machines. On a single processor machine, the kernel will
819 run faster if you say N here.
821 See also <file:Documentation/i386/IO-APIC.txt>,
822 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
823 <http://www.linuxdoc.org/docs.html#howto>.
825 If you don't know what to do here, say N.
828 prompt "Memory split"
831 Select the desired split between kernel and user memory.
833 If you are not absolutely sure what you are doing, leave this
837 bool "3G/1G user/kernel split"
839 bool "2G/2G user/kernel split"
841 bool "1G/3G user/kernel split"
846 default 0x40000000 if VMSPLIT_1G
847 default 0x80000000 if VMSPLIT_2G
851 int "Maximum number of CPUs (2-32)"
857 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
858 depends on SMP && HOTPLUG && EXPERIMENTAL
860 Say Y here to experiment with turning CPUs off and on. CPUs
861 can be controlled through /sys/devices/system/cpu.
864 bool "Use local timer interrupts"
865 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
868 Enable support for local timers on SMP platforms, rather then the
869 legacy IPI broadcast method. Local timers allows the system
870 accounting to be spread across the timer interval, preventing a
871 "thundering herd" at every timer tick.
874 bool "Preemptible Kernel (EXPERIMENTAL)"
875 depends on EXPERIMENTAL
877 This option reduces the latency of the kernel when reacting to
878 real-time or interactive events by allowing a low priority process to
879 be preempted even if it is in kernel mode executing a system call.
880 This allows applications to run more reliably even when the system is
883 Say Y here if you are building a kernel for a desktop, embedded
884 or real-time system. Say N if you are unsure.
888 default 128 if ARCH_L7200
889 default 200 if ARCH_EBSA110 || ARCH_S3C2410
890 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
891 default AT91_TIMER_HZ if ARCH_AT91
895 bool "Use the ARM EABI to compile the kernel"
897 This option allows for the kernel to be compiled using the latest
898 ARM ABI (aka EABI). This is only useful if you are using a user
899 space environment that is also compiled with EABI.
901 Since there are major incompatibilities between the legacy ABI and
902 EABI, especially with regard to structure member alignment, this
903 option also changes the kernel syscall calling convention to
904 disambiguate both ABIs and allow for backward compatibility support
905 (selected with CONFIG_OABI_COMPAT).
907 To use this you need GCC version 4.0.0 or later.
910 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
911 depends on AEABI && EXPERIMENTAL
914 This option preserves the old syscall interface along with the
915 new (ARM EABI) one. It also provides a compatibility layer to
916 intercept syscalls that have structure arguments which layout
917 in memory differs between the legacy ABI and the new ARM EABI
918 (only for non "thumb" binaries). This option adds a tiny
919 overhead to all syscalls and produces a slightly larger kernel.
920 If you know you'll be using only pure EABI user space then you
921 can say N here. If this option is not selected and you attempt
922 to execute a legacy ABI binary then the result will be
923 UNPREDICTABLE (in fact it can be predicted that it won't work
924 at all). If in doubt say Y.
926 config ARCH_FLATMEM_HAS_HOLES
931 # Discontigmem is deprecated
932 config ARCH_DISCONTIGMEM_ENABLE
935 config ARCH_SPARSEMEM_ENABLE
938 config ARCH_SPARSEMEM_DEFAULT
939 def_bool ARCH_SPARSEMEM_ENABLE
941 config ARCH_SELECT_MEMORY_MODEL
942 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
946 default "4" if ARCH_LH7A40X
948 depends on NEED_MULTIPLE_NODES
951 bool "High Memory Support (EXPERIMENTAL)"
952 depends on MMU && EXPERIMENTAL
954 The address space of ARM processors is only 4 Gigabytes large
955 and it has to accommodate user address space, kernel address
956 space as well as some memory mapped IO. That means that, if you
957 have a large amount of physical memory and/or IO, not all of the
958 memory can be "permanently mapped" by the kernel. The physical
959 memory that is not permanently mapped is called "high memory".
961 Depending on the selected kernel/user memory split, minimum
962 vmalloc space and actual amount of RAM, you may not need this
963 option which should result in a slightly faster kernel.
970 bool "Timer and CPU usage LEDs"
971 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
972 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
973 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
974 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
975 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
976 ARCH_AT91 || ARCH_DAVINCI || \
977 ARCH_KS8695 || MACH_RD88F5182
979 If you say Y here, the LEDs on your machine will be used
980 to provide useful information about your current system status.
982 If you are compiling a kernel for a NetWinder or EBSA-285, you will
983 be able to select which LEDs are active using the options below. If
984 you are compiling a kernel for the EBSA-110 or the LART however, the
985 red LED will simply flash regularly to indicate that the system is
986 still functional. It is safe to say Y here if you have a CATS
987 system, but the driver will do nothing.
990 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
991 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
992 || MACH_OMAP_PERSEUS2
994 depends on !GENERIC_CLOCKEVENTS
995 default y if ARCH_EBSA110
997 If you say Y here, one of the system LEDs (the green one on the
998 NetWinder, the amber one on the EBSA285, or the red one on the LART)
999 will flash regularly to indicate that the system is still
1000 operational. This is mainly useful to kernel hackers who are
1001 debugging unstable kernels.
1003 The LART uses the same LED for both Timer LED and CPU usage LED
1004 functions. You may choose to use both, but the Timer LED function
1005 will overrule the CPU usage LED.
1008 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1010 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1011 || MACH_OMAP_PERSEUS2
1014 If you say Y here, the red LED will be used to give a good real
1015 time indication of CPU usage, by lighting whenever the idle task
1016 is not currently executing.
1018 The LART uses the same LED for both Timer LED and CPU usage LED
1019 functions. You may choose to use both, but the Timer LED function
1020 will overrule the CPU usage LED.
1022 config ALIGNMENT_TRAP
1024 depends on CPU_CP15_MMU
1025 default y if !ARCH_EBSA110
1027 ARM processors cannot fetch/store information which is not
1028 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1029 address divisible by 4. On 32-bit ARM processors, these non-aligned
1030 fetch/store instructions will be emulated in software if you say
1031 here, which has a severe performance impact. This is necessary for
1032 correct operation of some network protocols. With an IP-only
1033 configuration it is safe to say N, otherwise say Y.
1039 # Compressed boot loader in ROM. Yes, we really want to ask about
1040 # TEXT and BSS so we preserve their values in the config files.
1041 config ZBOOT_ROM_TEXT
1042 hex "Compressed ROM boot loader base address"
1045 The physical address at which the ROM-able zImage is to be
1046 placed in the target. Platforms which normally make use of
1047 ROM-able zImage formats normally set this to a suitable
1048 value in their defconfig file.
1050 If ZBOOT_ROM is not enabled, this has no effect.
1052 config ZBOOT_ROM_BSS
1053 hex "Compressed ROM boot loader BSS address"
1056 The base address of an area of read/write memory in the target
1057 for the ROM-able zImage which must be available while the
1058 decompressor is running. It must be large enough to hold the
1059 entire decompressed kernel plus an additional 128 KiB.
1060 Platforms which normally make use of ROM-able zImage formats
1061 normally set this to a suitable value in their defconfig file.
1063 If ZBOOT_ROM is not enabled, this has no effect.
1066 bool "Compressed boot loader in ROM/flash"
1067 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1069 Say Y here if you intend to execute your compressed kernel image
1070 (zImage) directly from ROM or flash. If unsure, say N.
1073 string "Default kernel command string"
1076 On some architectures (EBSA110 and CATS), there is currently no way
1077 for the boot loader to pass arguments to the kernel. For these
1078 architectures, you should supply some command-line options at build
1079 time by entering them here. As a minimum, you should specify the
1080 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1083 bool "Kernel Execute-In-Place from ROM"
1084 depends on !ZBOOT_ROM
1086 Execute-In-Place allows the kernel to run from non-volatile storage
1087 directly addressable by the CPU, such as NOR flash. This saves RAM
1088 space since the text section of the kernel is not loaded from flash
1089 to RAM. Read-write sections, such as the data section and stack,
1090 are still copied to RAM. The XIP kernel is not compressed since
1091 it has to run directly from flash, so it will take more space to
1092 store it. The flash address used to link the kernel object files,
1093 and for storing it, is configuration dependent. Therefore, if you
1094 say Y here, you must know the proper physical address where to
1095 store the kernel image depending on your own flash memory usage.
1097 Also note that the make target becomes "make xipImage" rather than
1098 "make zImage" or "make Image". The final kernel binary to put in
1099 ROM memory will be arch/arm/boot/xipImage.
1103 config XIP_PHYS_ADDR
1104 hex "XIP Kernel Physical Location"
1105 depends on XIP_KERNEL
1106 default "0x00080000"
1108 This is the physical address in your flash memory the kernel will
1109 be linked for and stored to. This address is dependent on your
1113 bool "Kexec system call (EXPERIMENTAL)"
1114 depends on EXPERIMENTAL
1116 kexec is a system call that implements the ability to shutdown your
1117 current kernel, and to start another kernel. It is like a reboot
1118 but it is independent of the system firmware. And like a reboot
1119 you can start any kernel with it, not just Linux.
1121 It is an ongoing process to be certain the hardware in a machine
1122 is properly shutdown, so do not be surprised if this code does not
1123 initially work for you. It may help to enable device hotplugging
1127 bool "Export atags in procfs"
1131 Should the atags used to boot the kernel be exported in an "atags"
1132 file in procfs. Useful with kexec.
1136 menu "CPU Power Management"
1138 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1140 source "drivers/cpufreq/Kconfig"
1142 config CPU_FREQ_SA1100
1144 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1147 config CPU_FREQ_SA1110
1149 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1152 config CPU_FREQ_INTEGRATOR
1153 tristate "CPUfreq driver for ARM Integrator CPUs"
1154 depends on ARCH_INTEGRATOR && CPU_FREQ
1157 This enables the CPUfreq driver for ARM Integrator CPUs.
1159 For details, take a look at <file:Documentation/cpu-freq>.
1164 tristate "CPUfreq driver for i.MX CPUs"
1165 depends on ARCH_IMX && CPU_FREQ
1168 This enables the CPUfreq driver for i.MX CPUs.
1174 depends on CPU_FREQ && ARCH_PXA && PXA25x
1176 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1180 source "drivers/cpuidle/Kconfig"
1184 menu "Floating point emulation"
1186 comment "At least one emulation must be selected"
1189 bool "NWFPE math emulation"
1190 depends on !AEABI || OABI_COMPAT
1192 Say Y to include the NWFPE floating point emulator in the kernel.
1193 This is necessary to run most binaries. Linux does not currently
1194 support floating point hardware so you need to say Y here even if
1195 your machine has an FPA or floating point co-processor podule.
1197 You may say N here if you are going to load the Acorn FPEmulator
1198 early in the bootup.
1201 bool "Support extended precision"
1202 depends on FPE_NWFPE
1204 Say Y to include 80-bit support in the kernel floating-point
1205 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1206 Note that gcc does not generate 80-bit operations by default,
1207 so in most cases this option only enlarges the size of the
1208 floating point emulator without any good reason.
1210 You almost surely want to say N here.
1213 bool "FastFPE math emulation (EXPERIMENTAL)"
1214 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1216 Say Y here to include the FAST floating point emulator in the kernel.
1217 This is an experimental much faster emulator which now also has full
1218 precision for the mantissa. It does not support any exceptions.
1219 It is very simple, and approximately 3-6 times faster than NWFPE.
1221 It should be sufficient for most programs. It may be not suitable
1222 for scientific calculations, but you have to check this for yourself.
1223 If you do not feel you need a faster FP emulation you should better
1227 bool "VFP-format floating point maths"
1228 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1230 Say Y to include VFP support code in the kernel. This is needed
1231 if your hardware includes a VFP unit.
1233 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1234 release notes and additional status information.
1236 Say N if your target does not have VFP hardware.
1244 bool "Advanced SIMD (NEON) Extension support"
1245 depends on VFPv3 && CPU_V7
1247 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1252 menu "Userspace binary formats"
1254 source "fs/Kconfig.binfmt"
1257 tristate "RISC OS personality"
1260 Say Y here to include the kernel code necessary if you want to run
1261 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1262 experimental; if this sounds frightening, say N and sleep in peace.
1263 You can also say M here to compile this support as a module (which
1264 will be called arthur).
1268 menu "Power management options"
1270 source "kernel/power/Kconfig"
1272 config ARCH_SUSPEND_POSSIBLE
1277 source "net/Kconfig"
1279 menu "Device Drivers"
1281 source "drivers/base/Kconfig"
1283 source "drivers/connector/Kconfig"
1285 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1286 source "drivers/mtd/Kconfig"
1289 source "drivers/parport/Kconfig"
1291 source "drivers/pnp/Kconfig"
1293 source "drivers/block/Kconfig"
1295 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1297 source "drivers/misc/Kconfig"
1299 source "drivers/ide/Kconfig"
1301 source "drivers/scsi/Kconfig"
1303 source "drivers/ata/Kconfig"
1305 source "drivers/md/Kconfig"
1307 source "drivers/message/fusion/Kconfig"
1309 source "drivers/ieee1394/Kconfig"
1311 source "drivers/message/i2o/Kconfig"
1313 source "drivers/net/Kconfig"
1315 source "drivers/isdn/Kconfig"
1317 # input before char - char/joystick depends on it. As does USB.
1319 source "drivers/input/Kconfig"
1321 source "drivers/char/Kconfig"
1323 source "drivers/i2c/Kconfig"
1325 source "drivers/spi/Kconfig"
1327 source "drivers/gpio/Kconfig"
1329 source "drivers/w1/Kconfig"
1331 source "drivers/power/Kconfig"
1333 source "drivers/hwmon/Kconfig"
1335 source "drivers/thermal/Kconfig"
1337 source "drivers/watchdog/Kconfig"
1339 source "drivers/ssb/Kconfig"
1341 #source "drivers/l3/Kconfig"
1343 source "drivers/mfd/Kconfig"
1345 source "drivers/media/Kconfig"
1347 source "drivers/video/Kconfig"
1349 source "sound/Kconfig"
1351 source "drivers/hid/Kconfig"
1353 source "drivers/usb/Kconfig"
1355 source "drivers/uwb/Kconfig"
1357 source "drivers/mmc/Kconfig"
1359 source "drivers/memstick/Kconfig"
1361 source "drivers/accessibility/Kconfig"
1363 source "drivers/leds/Kconfig"
1365 source "drivers/rtc/Kconfig"
1367 source "drivers/dma/Kconfig"
1369 source "drivers/dca/Kconfig"
1371 source "drivers/auxdisplay/Kconfig"
1373 source "drivers/regulator/Kconfig"
1375 source "drivers/uio/Kconfig"
1377 source "drivers/staging/Kconfig"
1383 source "arch/arm/Kconfig.debug"
1385 source "security/Kconfig"
1387 source "crypto/Kconfig"
1389 source "lib/Kconfig"