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
591 Support for TI's DaVinci platform.
597 select ARCH_REQUIRE_GPIOLIB
599 select GENERIC_CLOCKEVENTS
601 Support for TI's OMAP platform (OMAP1 and OMAP2).
607 select GENERIC_CLOCKEVENTS
609 Support for Qualcomm MSM7K based systems. This runs on the ARM11
610 apps processor of the MSM7K and depends on a shared memory
611 interface to the ARM9 modem processor which runs the baseband stack
612 and controls some vital subsystems (clock and power control, etc).
615 bool "Nuvoton W90X900 CPU"
618 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
619 can login www.mcuos.com or www.nuvoton.com to know more.
623 source "arch/arm/mach-clps711x/Kconfig"
625 source "arch/arm/mach-ep93xx/Kconfig"
627 source "arch/arm/mach-footbridge/Kconfig"
629 source "arch/arm/mach-gemini/Kconfig"
631 source "arch/arm/mach-integrator/Kconfig"
633 source "arch/arm/mach-iop32x/Kconfig"
635 source "arch/arm/mach-iop33x/Kconfig"
637 source "arch/arm/mach-iop13xx/Kconfig"
639 source "arch/arm/mach-ixp4xx/Kconfig"
641 source "arch/arm/mach-ixp2000/Kconfig"
643 source "arch/arm/mach-ixp23xx/Kconfig"
645 source "arch/arm/mach-loki/Kconfig"
647 source "arch/arm/mach-mv78xx0/Kconfig"
649 source "arch/arm/mach-pxa/Kconfig"
650 source "arch/arm/plat-pxa/Kconfig"
652 source "arch/arm/mach-mmp/Kconfig"
654 source "arch/arm/mach-sa1100/Kconfig"
656 source "arch/arm/plat-omap/Kconfig"
658 source "arch/arm/mach-omap1/Kconfig"
660 source "arch/arm/mach-omap2/Kconfig"
662 source "arch/arm/mach-orion5x/Kconfig"
664 source "arch/arm/mach-kirkwood/Kconfig"
666 source "arch/arm/plat-s3c24xx/Kconfig"
667 source "arch/arm/plat-s3c64xx/Kconfig"
668 source "arch/arm/plat-s3c/Kconfig"
671 source "arch/arm/mach-s3c2400/Kconfig"
672 source "arch/arm/mach-s3c2410/Kconfig"
673 source "arch/arm/mach-s3c2412/Kconfig"
674 source "arch/arm/mach-s3c2440/Kconfig"
675 source "arch/arm/mach-s3c2442/Kconfig"
676 source "arch/arm/mach-s3c2443/Kconfig"
680 source "arch/arm/mach-s3c6400/Kconfig"
681 source "arch/arm/mach-s3c6410/Kconfig"
684 source "arch/arm/mach-lh7a40x/Kconfig"
686 source "arch/arm/mach-imx/Kconfig"
688 source "arch/arm/mach-h720x/Kconfig"
690 source "arch/arm/mach-versatile/Kconfig"
692 source "arch/arm/mach-aaec2000/Kconfig"
694 source "arch/arm/mach-realview/Kconfig"
696 source "arch/arm/mach-at91/Kconfig"
698 source "arch/arm/plat-mxc/Kconfig"
700 source "arch/arm/mach-netx/Kconfig"
702 source "arch/arm/mach-ns9xxx/Kconfig"
704 source "arch/arm/mach-davinci/Kconfig"
706 source "arch/arm/mach-ks8695/Kconfig"
708 source "arch/arm/mach-msm/Kconfig"
710 source "arch/arm/mach-w90x900/Kconfig"
712 # Definitions to make life easier
725 source arch/arm/mm/Kconfig
728 bool "Enable iWMMXt support"
729 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
730 default y if PXA27x || PXA3xx || ARCH_MMP
732 Enable support for iWMMXt context switching at run time if
733 running on a CPU that supports it.
735 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
738 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
742 source "arch/arm/Kconfig-nommu"
747 source "arch/arm/common/Kconfig"
749 config FORCE_MAX_ZONEORDER
762 Find out whether you have ISA slots on your motherboard. ISA is the
763 name of a bus system, i.e. the way the CPU talks to the other stuff
764 inside your box. Other bus systems are PCI, EISA, MicroChannel
765 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
766 newer boards don't support it. If you have ISA, say Y, otherwise N.
768 # Select ISA DMA controller support
773 # Select ISA DMA interface
778 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
780 Find out whether you have a PCI motherboard. PCI is the name of a
781 bus system, i.e. the way the CPU talks to the other stuff inside
782 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
783 VESA. If you have PCI, say Y, otherwise N.
788 # Select the host bridge type
789 config PCI_HOST_VIA82C505
791 depends on PCI && ARCH_SHARK
794 config PCI_HOST_ITE8152
796 depends on PCI && MACH_ARMCORE
800 source "drivers/pci/Kconfig"
802 source "drivers/pcmcia/Kconfig"
806 menu "Kernel Features"
808 source "kernel/time/Kconfig"
811 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
812 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
813 select USE_GENERIC_SMP_HELPERS
815 This enables support for systems with more than one CPU. If you have
816 a system with only one CPU, like most personal computers, say N. If
817 you have a system with more than one CPU, say Y.
819 If you say N here, the kernel will run on single and multiprocessor
820 machines, but will use only one CPU of a multiprocessor machine. If
821 you say Y here, the kernel will run on many, but not all, single
822 processor machines. On a single processor machine, the kernel will
823 run faster if you say N here.
825 See also <file:Documentation/i386/IO-APIC.txt>,
826 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
827 <http://www.linuxdoc.org/docs.html#howto>.
829 If you don't know what to do here, say N.
832 prompt "Memory split"
835 Select the desired split between kernel and user memory.
837 If you are not absolutely sure what you are doing, leave this
841 bool "3G/1G user/kernel split"
843 bool "2G/2G user/kernel split"
845 bool "1G/3G user/kernel split"
850 default 0x40000000 if VMSPLIT_1G
851 default 0x80000000 if VMSPLIT_2G
855 int "Maximum number of CPUs (2-32)"
861 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
862 depends on SMP && HOTPLUG && EXPERIMENTAL
864 Say Y here to experiment with turning CPUs off and on. CPUs
865 can be controlled through /sys/devices/system/cpu.
868 bool "Use local timer interrupts"
869 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
872 Enable support for local timers on SMP platforms, rather then the
873 legacy IPI broadcast method. Local timers allows the system
874 accounting to be spread across the timer interval, preventing a
875 "thundering herd" at every timer tick.
878 bool "Preemptible Kernel (EXPERIMENTAL)"
879 depends on EXPERIMENTAL
881 This option reduces the latency of the kernel when reacting to
882 real-time or interactive events by allowing a low priority process to
883 be preempted even if it is in kernel mode executing a system call.
884 This allows applications to run more reliably even when the system is
887 Say Y here if you are building a kernel for a desktop, embedded
888 or real-time system. Say N if you are unsure.
892 default 128 if ARCH_L7200
893 default 200 if ARCH_EBSA110 || ARCH_S3C2410
894 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
895 default AT91_TIMER_HZ if ARCH_AT91
899 bool "Use the ARM EABI to compile the kernel"
901 This option allows for the kernel to be compiled using the latest
902 ARM ABI (aka EABI). This is only useful if you are using a user
903 space environment that is also compiled with EABI.
905 Since there are major incompatibilities between the legacy ABI and
906 EABI, especially with regard to structure member alignment, this
907 option also changes the kernel syscall calling convention to
908 disambiguate both ABIs and allow for backward compatibility support
909 (selected with CONFIG_OABI_COMPAT).
911 To use this you need GCC version 4.0.0 or later.
914 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
915 depends on AEABI && EXPERIMENTAL
918 This option preserves the old syscall interface along with the
919 new (ARM EABI) one. It also provides a compatibility layer to
920 intercept syscalls that have structure arguments which layout
921 in memory differs between the legacy ABI and the new ARM EABI
922 (only for non "thumb" binaries). This option adds a tiny
923 overhead to all syscalls and produces a slightly larger kernel.
924 If you know you'll be using only pure EABI user space then you
925 can say N here. If this option is not selected and you attempt
926 to execute a legacy ABI binary then the result will be
927 UNPREDICTABLE (in fact it can be predicted that it won't work
928 at all). If in doubt say Y.
930 config ARCH_FLATMEM_HAS_HOLES
935 # Discontigmem is deprecated
936 config ARCH_DISCONTIGMEM_ENABLE
939 config ARCH_SPARSEMEM_ENABLE
942 config ARCH_SPARSEMEM_DEFAULT
943 def_bool ARCH_SPARSEMEM_ENABLE
945 config ARCH_SELECT_MEMORY_MODEL
946 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
950 default "4" if ARCH_LH7A40X
952 depends on NEED_MULTIPLE_NODES
955 bool "High Memory Support (EXPERIMENTAL)"
956 depends on MMU && EXPERIMENTAL
958 The address space of ARM processors is only 4 Gigabytes large
959 and it has to accommodate user address space, kernel address
960 space as well as some memory mapped IO. That means that, if you
961 have a large amount of physical memory and/or IO, not all of the
962 memory can be "permanently mapped" by the kernel. The physical
963 memory that is not permanently mapped is called "high memory".
965 Depending on the selected kernel/user memory split, minimum
966 vmalloc space and actual amount of RAM, you may not need this
967 option which should result in a slightly faster kernel.
974 bool "Timer and CPU usage LEDs"
975 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
976 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
977 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
978 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
979 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
980 ARCH_AT91 || ARCH_DAVINCI || \
981 ARCH_KS8695 || MACH_RD88F5182
983 If you say Y here, the LEDs on your machine will be used
984 to provide useful information about your current system status.
986 If you are compiling a kernel for a NetWinder or EBSA-285, you will
987 be able to select which LEDs are active using the options below. If
988 you are compiling a kernel for the EBSA-110 or the LART however, the
989 red LED will simply flash regularly to indicate that the system is
990 still functional. It is safe to say Y here if you have a CATS
991 system, but the driver will do nothing.
994 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
995 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
996 || MACH_OMAP_PERSEUS2
998 depends on !GENERIC_CLOCKEVENTS
999 default y if ARCH_EBSA110
1001 If you say Y here, one of the system LEDs (the green one on the
1002 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1003 will flash regularly to indicate that the system is still
1004 operational. This is mainly useful to kernel hackers who are
1005 debugging unstable kernels.
1007 The LART uses the same LED for both Timer LED and CPU usage LED
1008 functions. You may choose to use both, but the Timer LED function
1009 will overrule the CPU usage LED.
1012 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1014 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1015 || MACH_OMAP_PERSEUS2
1018 If you say Y here, the red LED will be used to give a good real
1019 time indication of CPU usage, by lighting whenever the idle task
1020 is not currently executing.
1022 The LART uses the same LED for both Timer LED and CPU usage LED
1023 functions. You may choose to use both, but the Timer LED function
1024 will overrule the CPU usage LED.
1026 config ALIGNMENT_TRAP
1028 depends on CPU_CP15_MMU
1029 default y if !ARCH_EBSA110
1031 ARM processors cannot fetch/store information which is not
1032 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1033 address divisible by 4. On 32-bit ARM processors, these non-aligned
1034 fetch/store instructions will be emulated in software if you say
1035 here, which has a severe performance impact. This is necessary for
1036 correct operation of some network protocols. With an IP-only
1037 configuration it is safe to say N, otherwise say Y.
1043 # Compressed boot loader in ROM. Yes, we really want to ask about
1044 # TEXT and BSS so we preserve their values in the config files.
1045 config ZBOOT_ROM_TEXT
1046 hex "Compressed ROM boot loader base address"
1049 The physical address at which the ROM-able zImage is to be
1050 placed in the target. Platforms which normally make use of
1051 ROM-able zImage formats normally set this to a suitable
1052 value in their defconfig file.
1054 If ZBOOT_ROM is not enabled, this has no effect.
1056 config ZBOOT_ROM_BSS
1057 hex "Compressed ROM boot loader BSS address"
1060 The base address of an area of read/write memory in the target
1061 for the ROM-able zImage which must be available while the
1062 decompressor is running. It must be large enough to hold the
1063 entire decompressed kernel plus an additional 128 KiB.
1064 Platforms which normally make use of ROM-able zImage formats
1065 normally set this to a suitable value in their defconfig file.
1067 If ZBOOT_ROM is not enabled, this has no effect.
1070 bool "Compressed boot loader in ROM/flash"
1071 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1073 Say Y here if you intend to execute your compressed kernel image
1074 (zImage) directly from ROM or flash. If unsure, say N.
1077 string "Default kernel command string"
1080 On some architectures (EBSA110 and CATS), there is currently no way
1081 for the boot loader to pass arguments to the kernel. For these
1082 architectures, you should supply some command-line options at build
1083 time by entering them here. As a minimum, you should specify the
1084 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1087 bool "Kernel Execute-In-Place from ROM"
1088 depends on !ZBOOT_ROM
1090 Execute-In-Place allows the kernel to run from non-volatile storage
1091 directly addressable by the CPU, such as NOR flash. This saves RAM
1092 space since the text section of the kernel is not loaded from flash
1093 to RAM. Read-write sections, such as the data section and stack,
1094 are still copied to RAM. The XIP kernel is not compressed since
1095 it has to run directly from flash, so it will take more space to
1096 store it. The flash address used to link the kernel object files,
1097 and for storing it, is configuration dependent. Therefore, if you
1098 say Y here, you must know the proper physical address where to
1099 store the kernel image depending on your own flash memory usage.
1101 Also note that the make target becomes "make xipImage" rather than
1102 "make zImage" or "make Image". The final kernel binary to put in
1103 ROM memory will be arch/arm/boot/xipImage.
1107 config XIP_PHYS_ADDR
1108 hex "XIP Kernel Physical Location"
1109 depends on XIP_KERNEL
1110 default "0x00080000"
1112 This is the physical address in your flash memory the kernel will
1113 be linked for and stored to. This address is dependent on your
1117 bool "Kexec system call (EXPERIMENTAL)"
1118 depends on EXPERIMENTAL
1120 kexec is a system call that implements the ability to shutdown your
1121 current kernel, and to start another kernel. It is like a reboot
1122 but it is independent of the system firmware. And like a reboot
1123 you can start any kernel with it, not just Linux.
1125 It is an ongoing process to be certain the hardware in a machine
1126 is properly shutdown, so do not be surprised if this code does not
1127 initially work for you. It may help to enable device hotplugging
1131 bool "Export atags in procfs"
1135 Should the atags used to boot the kernel be exported in an "atags"
1136 file in procfs. Useful with kexec.
1140 menu "CPU Power Management"
1142 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1144 source "drivers/cpufreq/Kconfig"
1146 config CPU_FREQ_SA1100
1148 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1151 config CPU_FREQ_SA1110
1153 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1156 config CPU_FREQ_INTEGRATOR
1157 tristate "CPUfreq driver for ARM Integrator CPUs"
1158 depends on ARCH_INTEGRATOR && CPU_FREQ
1161 This enables the CPUfreq driver for ARM Integrator CPUs.
1163 For details, take a look at <file:Documentation/cpu-freq>.
1168 tristate "CPUfreq driver for i.MX CPUs"
1169 depends on ARCH_IMX && CPU_FREQ
1172 This enables the CPUfreq driver for i.MX CPUs.
1178 depends on CPU_FREQ && ARCH_PXA && PXA25x
1180 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1184 source "drivers/cpuidle/Kconfig"
1188 menu "Floating point emulation"
1190 comment "At least one emulation must be selected"
1193 bool "NWFPE math emulation"
1194 depends on !AEABI || OABI_COMPAT
1196 Say Y to include the NWFPE floating point emulator in the kernel.
1197 This is necessary to run most binaries. Linux does not currently
1198 support floating point hardware so you need to say Y here even if
1199 your machine has an FPA or floating point co-processor podule.
1201 You may say N here if you are going to load the Acorn FPEmulator
1202 early in the bootup.
1205 bool "Support extended precision"
1206 depends on FPE_NWFPE
1208 Say Y to include 80-bit support in the kernel floating-point
1209 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1210 Note that gcc does not generate 80-bit operations by default,
1211 so in most cases this option only enlarges the size of the
1212 floating point emulator without any good reason.
1214 You almost surely want to say N here.
1217 bool "FastFPE math emulation (EXPERIMENTAL)"
1218 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1220 Say Y here to include the FAST floating point emulator in the kernel.
1221 This is an experimental much faster emulator which now also has full
1222 precision for the mantissa. It does not support any exceptions.
1223 It is very simple, and approximately 3-6 times faster than NWFPE.
1225 It should be sufficient for most programs. It may be not suitable
1226 for scientific calculations, but you have to check this for yourself.
1227 If you do not feel you need a faster FP emulation you should better
1231 bool "VFP-format floating point maths"
1232 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1234 Say Y to include VFP support code in the kernel. This is needed
1235 if your hardware includes a VFP unit.
1237 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1238 release notes and additional status information.
1240 Say N if your target does not have VFP hardware.
1248 bool "Advanced SIMD (NEON) Extension support"
1249 depends on VFPv3 && CPU_V7
1251 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1256 menu "Userspace binary formats"
1258 source "fs/Kconfig.binfmt"
1261 tristate "RISC OS personality"
1264 Say Y here to include the kernel code necessary if you want to run
1265 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1266 experimental; if this sounds frightening, say N and sleep in peace.
1267 You can also say M here to compile this support as a module (which
1268 will be called arthur).
1272 menu "Power management options"
1274 source "kernel/power/Kconfig"
1276 config ARCH_SUSPEND_POSSIBLE
1281 source "net/Kconfig"
1283 menu "Device Drivers"
1285 source "drivers/base/Kconfig"
1287 source "drivers/connector/Kconfig"
1289 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1290 source "drivers/mtd/Kconfig"
1293 source "drivers/parport/Kconfig"
1295 source "drivers/pnp/Kconfig"
1297 source "drivers/block/Kconfig"
1299 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1301 source "drivers/misc/Kconfig"
1303 source "drivers/ide/Kconfig"
1305 source "drivers/scsi/Kconfig"
1307 source "drivers/ata/Kconfig"
1309 source "drivers/md/Kconfig"
1311 source "drivers/message/fusion/Kconfig"
1313 source "drivers/ieee1394/Kconfig"
1315 source "drivers/message/i2o/Kconfig"
1317 source "drivers/net/Kconfig"
1319 source "drivers/isdn/Kconfig"
1321 # input before char - char/joystick depends on it. As does USB.
1323 source "drivers/input/Kconfig"
1325 source "drivers/char/Kconfig"
1327 source "drivers/i2c/Kconfig"
1329 source "drivers/spi/Kconfig"
1331 source "drivers/gpio/Kconfig"
1333 source "drivers/w1/Kconfig"
1335 source "drivers/power/Kconfig"
1337 source "drivers/hwmon/Kconfig"
1339 source "drivers/thermal/Kconfig"
1341 source "drivers/watchdog/Kconfig"
1343 source "drivers/ssb/Kconfig"
1345 #source "drivers/l3/Kconfig"
1347 source "drivers/mfd/Kconfig"
1349 source "drivers/media/Kconfig"
1351 source "drivers/video/Kconfig"
1353 source "sound/Kconfig"
1355 source "drivers/hid/Kconfig"
1357 source "drivers/usb/Kconfig"
1359 source "drivers/uwb/Kconfig"
1361 source "drivers/mmc/Kconfig"
1363 source "drivers/memstick/Kconfig"
1365 source "drivers/accessibility/Kconfig"
1367 source "drivers/leds/Kconfig"
1369 source "drivers/rtc/Kconfig"
1371 source "drivers/dma/Kconfig"
1373 source "drivers/dca/Kconfig"
1375 source "drivers/auxdisplay/Kconfig"
1377 source "drivers/regulator/Kconfig"
1379 source "drivers/uio/Kconfig"
1381 source "drivers/staging/Kconfig"
1387 source "arch/arm/Kconfig.debug"
1389 source "security/Kconfig"
1391 source "crypto/Kconfig"
1393 source "lib/Kconfig"