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.
279 config ARCH_FOOTBRIDGE
284 Support for systems based on the DC21285 companion chip
285 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
288 bool "Hilscher NetX based"
291 select GENERIC_CLOCKEVENTS
294 This enables support for systems based on the Hilscher NetX Soc
297 bool "Hynix HMS720x-based"
301 This enables support for systems based on the Hynix HMS720x
308 select GENERIC_CLOCKEVENTS
310 Support for Motorola's i.MX family of processors (MX1, MXL).
318 select ARCH_SUPPORTS_MSI
321 Support for Intel's IOP13XX (XScale) family of processors.
330 select ARCH_REQUIRE_GPIOLIB
332 Support for Intel's 80219 and IOP32X (XScale) family of
342 select ARCH_REQUIRE_GPIOLIB
344 Support for Intel's IOP33X (XScale) family of processors.
352 Support for Intel's IXP23xx (XScale) family of processors.
355 bool "IXP2400/2800-based"
360 Support for Intel's IXP2400/2800 (XScale) family of processors.
368 select GENERIC_CLOCKEVENTS
369 select DMABOUNCE if PCI
371 Support for Intel's IXP4XX (XScale) family of processors.
378 Say Y here if you intend to run this kernel on a LinkUp Systems
379 L7200 Software Development Board which uses an ARM720T processor.
380 Information on this board can be obtained at:
382 <http://www.linkupsys.com/>
384 If you have any questions or comments about the Linux kernel port
385 to this board, send e-mail to <sjhill@cotw.com>.
388 bool "Marvell Kirkwood"
393 select GENERIC_CLOCKEVENTS
396 Support for the following Marvell Kirkwood series SoCs:
397 88F6180, 88F6192 and 88F6281.
400 bool "Micrel/Kendin KS8695"
403 select ARCH_REQUIRE_GPIOLIB
405 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
406 System-on-Chip devices.
409 bool "NetSilicon NS9xxx"
413 select GENERIC_CLOCKEVENTS
416 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
419 <http://www.digi.com/products/microprocessors/index.jsp>
422 bool "Marvell Loki (88RC8480)"
425 select GENERIC_CLOCKEVENTS
428 Support for the Marvell Loki (88RC8480) SoC.
431 bool "Marvell MV78xx0"
436 select GENERIC_CLOCKEVENTS
439 Support for the following Marvell MV78xx0 series SoCs:
443 bool "Freescale MXC/iMX-based"
445 select GENERIC_CLOCKEVENTS
448 select ARCH_REQUIRE_GPIOLIB
450 Support for Freescale MXC/iMX-based family of processors
459 select GENERIC_CLOCKEVENTS
462 Support for the following Marvell Orion 5x series SoCs:
463 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
464 Orion-2 (5281), Orion-1-90 (6183).
467 bool "Philips Nexperia PNX4008 Mobile"
471 This enables support for Philips PNX4008 mobile platform.
474 bool "PXA2xx/PXA3xx-based"
480 select ARCH_REQUIRE_GPIOLIB
484 select GENERIC_CLOCKEVENTS
488 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
491 bool "Marvell PXA168"
496 select GENERIC_CLOCKEVENTS
500 Support for Marvell's PXA168 processor line.
507 select ARCH_MAY_HAVE_PC_FDC
508 select HAVE_PATA_PLATFORM
511 select ARCH_SPARSEMEM_ENABLE
513 On the Acorn Risc-PC, Linux can support the internal IDE disk and
514 CD-ROM interface, serial and parallel port, and the floppy drive.
520 select ARCH_SPARSEMEM_ENABLE
524 select GENERIC_CLOCKEVENTS
527 select ARCH_REQUIRE_GPIOLIB
529 Support for StrongARM 11x0 based boards.
532 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
536 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
537 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
538 the Samsung SMDK2410 development board (and derivatives).
541 bool "Samsung S3C64XX"
545 Samsung S3C64XX series based systems
555 Support for the StrongARM based Digital DNARD machine, also known
556 as "Shark" (<http://www.shark-linux.de/shark.html>).
561 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
562 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
564 Say Y here for systems based on one of the Sharp LH7A40X
565 System on a Chip processors. These CPUs include an ARM922T
566 core with a wide array of integrated devices for
567 hand-held and low-power applications.
573 select GENERIC_CLOCKEVENTS
575 select ARCH_REQUIRE_GPIOLIB
579 Support for TI's DaVinci platform.
585 select ARCH_REQUIRE_GPIOLIB
587 select GENERIC_CLOCKEVENTS
589 Support for TI's OMAP platform (OMAP1 and OMAP2).
595 select GENERIC_CLOCKEVENTS
597 Support for Qualcomm MSM7K based systems. This runs on the ARM11
598 apps processor of the MSM7K and depends on a shared memory
599 interface to the ARM9 modem processor which runs the baseband stack
600 and controls some vital subsystems (clock and power control, etc).
603 bool "Nuvoton W90X900 CPU"
606 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
607 can login www.mcuos.com or www.nuvoton.com to know more.
611 source "arch/arm/mach-clps711x/Kconfig"
613 source "arch/arm/mach-ep93xx/Kconfig"
615 source "arch/arm/mach-footbridge/Kconfig"
617 source "arch/arm/mach-integrator/Kconfig"
619 source "arch/arm/mach-iop32x/Kconfig"
621 source "arch/arm/mach-iop33x/Kconfig"
623 source "arch/arm/mach-iop13xx/Kconfig"
625 source "arch/arm/mach-ixp4xx/Kconfig"
627 source "arch/arm/mach-ixp2000/Kconfig"
629 source "arch/arm/mach-ixp23xx/Kconfig"
631 source "arch/arm/mach-loki/Kconfig"
633 source "arch/arm/mach-mv78xx0/Kconfig"
635 source "arch/arm/mach-pxa/Kconfig"
636 source "arch/arm/plat-pxa/Kconfig"
638 source "arch/arm/mach-mmp/Kconfig"
640 source "arch/arm/mach-sa1100/Kconfig"
642 source "arch/arm/plat-omap/Kconfig"
644 source "arch/arm/mach-omap1/Kconfig"
646 source "arch/arm/mach-omap2/Kconfig"
648 source "arch/arm/mach-orion5x/Kconfig"
650 source "arch/arm/mach-kirkwood/Kconfig"
652 source "arch/arm/plat-s3c24xx/Kconfig"
653 source "arch/arm/plat-s3c64xx/Kconfig"
654 source "arch/arm/plat-s3c/Kconfig"
657 source "arch/arm/mach-s3c2400/Kconfig"
658 source "arch/arm/mach-s3c2410/Kconfig"
659 source "arch/arm/mach-s3c2412/Kconfig"
660 source "arch/arm/mach-s3c2440/Kconfig"
661 source "arch/arm/mach-s3c2442/Kconfig"
662 source "arch/arm/mach-s3c2443/Kconfig"
666 source "arch/arm/mach-s3c6400/Kconfig"
667 source "arch/arm/mach-s3c6410/Kconfig"
670 source "arch/arm/mach-lh7a40x/Kconfig"
672 source "arch/arm/mach-imx/Kconfig"
674 source "arch/arm/mach-h720x/Kconfig"
676 source "arch/arm/mach-versatile/Kconfig"
678 source "arch/arm/mach-aaec2000/Kconfig"
680 source "arch/arm/mach-realview/Kconfig"
682 source "arch/arm/mach-at91/Kconfig"
684 source "arch/arm/plat-mxc/Kconfig"
686 source "arch/arm/mach-netx/Kconfig"
688 source "arch/arm/mach-ns9xxx/Kconfig"
690 source "arch/arm/mach-davinci/Kconfig"
692 source "arch/arm/mach-ks8695/Kconfig"
694 source "arch/arm/mach-msm/Kconfig"
696 source "arch/arm/mach-w90x900/Kconfig"
698 # Definitions to make life easier
711 source arch/arm/mm/Kconfig
714 bool "Enable iWMMXt support"
715 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
716 default y if PXA27x || PXA3xx || ARCH_MMP
718 Enable support for iWMMXt context switching at run time if
719 running on a CPU that supports it.
721 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
724 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
728 source "arch/arm/Kconfig-nommu"
733 source "arch/arm/common/Kconfig"
735 config FORCE_MAX_ZONEORDER
748 Find out whether you have ISA slots on your motherboard. ISA is the
749 name of a bus system, i.e. the way the CPU talks to the other stuff
750 inside your box. Other bus systems are PCI, EISA, MicroChannel
751 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
752 newer boards don't support it. If you have ISA, say Y, otherwise N.
754 # Select ISA DMA controller support
759 # Select ISA DMA interface
764 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
766 Find out whether you have a PCI motherboard. PCI is the name of a
767 bus system, i.e. the way the CPU talks to the other stuff inside
768 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
769 VESA. If you have PCI, say Y, otherwise N.
774 # Select the host bridge type
775 config PCI_HOST_VIA82C505
777 depends on PCI && ARCH_SHARK
780 config PCI_HOST_ITE8152
782 depends on PCI && MACH_ARMCORE
786 source "drivers/pci/Kconfig"
788 source "drivers/pcmcia/Kconfig"
792 menu "Kernel Features"
794 source "kernel/time/Kconfig"
797 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
798 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
799 select USE_GENERIC_SMP_HELPERS
801 This enables support for systems with more than one CPU. If you have
802 a system with only one CPU, like most personal computers, say N. If
803 you have a system with more than one CPU, say Y.
805 If you say N here, the kernel will run on single and multiprocessor
806 machines, but will use only one CPU of a multiprocessor machine. If
807 you say Y here, the kernel will run on many, but not all, single
808 processor machines. On a single processor machine, the kernel will
809 run faster if you say N here.
811 See also <file:Documentation/i386/IO-APIC.txt>,
812 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
813 <http://www.linuxdoc.org/docs.html#howto>.
815 If you don't know what to do here, say N.
818 prompt "Memory split"
821 Select the desired split between kernel and user memory.
823 If you are not absolutely sure what you are doing, leave this
827 bool "3G/1G user/kernel split"
829 bool "2G/2G user/kernel split"
831 bool "1G/3G user/kernel split"
836 default 0x40000000 if VMSPLIT_1G
837 default 0x80000000 if VMSPLIT_2G
841 int "Maximum number of CPUs (2-32)"
847 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
848 depends on SMP && HOTPLUG && EXPERIMENTAL
850 Say Y here to experiment with turning CPUs off and on. CPUs
851 can be controlled through /sys/devices/system/cpu.
854 bool "Use local timer interrupts"
855 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
858 Enable support for local timers on SMP platforms, rather then the
859 legacy IPI broadcast method. Local timers allows the system
860 accounting to be spread across the timer interval, preventing a
861 "thundering herd" at every timer tick.
864 bool "Preemptible Kernel (EXPERIMENTAL)"
865 depends on EXPERIMENTAL
867 This option reduces the latency of the kernel when reacting to
868 real-time or interactive events by allowing a low priority process to
869 be preempted even if it is in kernel mode executing a system call.
870 This allows applications to run more reliably even when the system is
873 Say Y here if you are building a kernel for a desktop, embedded
874 or real-time system. Say N if you are unsure.
878 default 128 if ARCH_L7200
879 default 200 if ARCH_EBSA110 || ARCH_S3C2410
880 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
881 default AT91_TIMER_HZ if ARCH_AT91
885 bool "Use the ARM EABI to compile the kernel"
887 This option allows for the kernel to be compiled using the latest
888 ARM ABI (aka EABI). This is only useful if you are using a user
889 space environment that is also compiled with EABI.
891 Since there are major incompatibilities between the legacy ABI and
892 EABI, especially with regard to structure member alignment, this
893 option also changes the kernel syscall calling convention to
894 disambiguate both ABIs and allow for backward compatibility support
895 (selected with CONFIG_OABI_COMPAT).
897 To use this you need GCC version 4.0.0 or later.
900 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
901 depends on AEABI && EXPERIMENTAL
904 This option preserves the old syscall interface along with the
905 new (ARM EABI) one. It also provides a compatibility layer to
906 intercept syscalls that have structure arguments which layout
907 in memory differs between the legacy ABI and the new ARM EABI
908 (only for non "thumb" binaries). This option adds a tiny
909 overhead to all syscalls and produces a slightly larger kernel.
910 If you know you'll be using only pure EABI user space then you
911 can say N here. If this option is not selected and you attempt
912 to execute a legacy ABI binary then the result will be
913 UNPREDICTABLE (in fact it can be predicted that it won't work
914 at all). If in doubt say Y.
916 config ARCH_FLATMEM_HAS_HOLES
921 # Discontigmem is deprecated
922 config ARCH_DISCONTIGMEM_ENABLE
925 config ARCH_SPARSEMEM_ENABLE
928 config ARCH_SPARSEMEM_DEFAULT
929 def_bool ARCH_SPARSEMEM_ENABLE
931 config ARCH_SELECT_MEMORY_MODEL
932 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
936 default "4" if ARCH_LH7A40X
938 depends on NEED_MULTIPLE_NODES
943 bool "Timer and CPU usage LEDs"
944 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
945 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
946 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
947 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
948 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
949 ARCH_AT91 || ARCH_DAVINCI || \
950 ARCH_KS8695 || MACH_RD88F5182
952 If you say Y here, the LEDs on your machine will be used
953 to provide useful information about your current system status.
955 If you are compiling a kernel for a NetWinder or EBSA-285, you will
956 be able to select which LEDs are active using the options below. If
957 you are compiling a kernel for the EBSA-110 or the LART however, the
958 red LED will simply flash regularly to indicate that the system is
959 still functional. It is safe to say Y here if you have a CATS
960 system, but the driver will do nothing.
963 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
964 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
965 || MACH_OMAP_PERSEUS2
967 depends on !GENERIC_CLOCKEVENTS
968 default y if ARCH_EBSA110
970 If you say Y here, one of the system LEDs (the green one on the
971 NetWinder, the amber one on the EBSA285, or the red one on the LART)
972 will flash regularly to indicate that the system is still
973 operational. This is mainly useful to kernel hackers who are
974 debugging unstable kernels.
976 The LART uses the same LED for both Timer LED and CPU usage LED
977 functions. You may choose to use both, but the Timer LED function
978 will overrule the CPU usage LED.
981 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
983 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
984 || MACH_OMAP_PERSEUS2
987 If you say Y here, the red LED will be used to give a good real
988 time indication of CPU usage, by lighting whenever the idle task
989 is not currently executing.
991 The LART uses the same LED for both Timer LED and CPU usage LED
992 functions. You may choose to use both, but the Timer LED function
993 will overrule the CPU usage LED.
995 config ALIGNMENT_TRAP
997 depends on CPU_CP15_MMU
998 default y if !ARCH_EBSA110
1000 ARM processors cannot fetch/store information which is not
1001 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1002 address divisible by 4. On 32-bit ARM processors, these non-aligned
1003 fetch/store instructions will be emulated in software if you say
1004 here, which has a severe performance impact. This is necessary for
1005 correct operation of some network protocols. With an IP-only
1006 configuration it is safe to say N, otherwise say Y.
1012 # Compressed boot loader in ROM. Yes, we really want to ask about
1013 # TEXT and BSS so we preserve their values in the config files.
1014 config ZBOOT_ROM_TEXT
1015 hex "Compressed ROM boot loader base address"
1018 The physical address at which the ROM-able zImage is to be
1019 placed in the target. Platforms which normally make use of
1020 ROM-able zImage formats normally set this to a suitable
1021 value in their defconfig file.
1023 If ZBOOT_ROM is not enabled, this has no effect.
1025 config ZBOOT_ROM_BSS
1026 hex "Compressed ROM boot loader BSS address"
1029 The base address of an area of read/write memory in the target
1030 for the ROM-able zImage which must be available while the
1031 decompressor is running. It must be large enough to hold the
1032 entire decompressed kernel plus an additional 128 KiB.
1033 Platforms which normally make use of ROM-able zImage formats
1034 normally set this to a suitable value in their defconfig file.
1036 If ZBOOT_ROM is not enabled, this has no effect.
1039 bool "Compressed boot loader in ROM/flash"
1040 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1042 Say Y here if you intend to execute your compressed kernel image
1043 (zImage) directly from ROM or flash. If unsure, say N.
1046 string "Default kernel command string"
1049 On some architectures (EBSA110 and CATS), there is currently no way
1050 for the boot loader to pass arguments to the kernel. For these
1051 architectures, you should supply some command-line options at build
1052 time by entering them here. As a minimum, you should specify the
1053 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1056 bool "Kernel Execute-In-Place from ROM"
1057 depends on !ZBOOT_ROM
1059 Execute-In-Place allows the kernel to run from non-volatile storage
1060 directly addressable by the CPU, such as NOR flash. This saves RAM
1061 space since the text section of the kernel is not loaded from flash
1062 to RAM. Read-write sections, such as the data section and stack,
1063 are still copied to RAM. The XIP kernel is not compressed since
1064 it has to run directly from flash, so it will take more space to
1065 store it. The flash address used to link the kernel object files,
1066 and for storing it, is configuration dependent. Therefore, if you
1067 say Y here, you must know the proper physical address where to
1068 store the kernel image depending on your own flash memory usage.
1070 Also note that the make target becomes "make xipImage" rather than
1071 "make zImage" or "make Image". The final kernel binary to put in
1072 ROM memory will be arch/arm/boot/xipImage.
1076 config XIP_PHYS_ADDR
1077 hex "XIP Kernel Physical Location"
1078 depends on XIP_KERNEL
1079 default "0x00080000"
1081 This is the physical address in your flash memory the kernel will
1082 be linked for and stored to. This address is dependent on your
1086 bool "Kexec system call (EXPERIMENTAL)"
1087 depends on EXPERIMENTAL
1089 kexec is a system call that implements the ability to shutdown your
1090 current kernel, and to start another kernel. It is like a reboot
1091 but it is independent of the system firmware. And like a reboot
1092 you can start any kernel with it, not just Linux.
1094 It is an ongoing process to be certain the hardware in a machine
1095 is properly shutdown, so do not be surprised if this code does not
1096 initially work for you. It may help to enable device hotplugging
1100 bool "Export atags in procfs"
1104 Should the atags used to boot the kernel be exported in an "atags"
1105 file in procfs. Useful with kexec.
1109 menu "CPU Power Management"
1111 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1113 source "drivers/cpufreq/Kconfig"
1115 config CPU_FREQ_SA1100
1117 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1120 config CPU_FREQ_SA1110
1122 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1125 config CPU_FREQ_INTEGRATOR
1126 tristate "CPUfreq driver for ARM Integrator CPUs"
1127 depends on ARCH_INTEGRATOR && CPU_FREQ
1130 This enables the CPUfreq driver for ARM Integrator CPUs.
1132 For details, take a look at <file:Documentation/cpu-freq>.
1137 tristate "CPUfreq driver for i.MX CPUs"
1138 depends on ARCH_IMX && CPU_FREQ
1141 This enables the CPUfreq driver for i.MX CPUs.
1147 depends on CPU_FREQ && ARCH_PXA && PXA25x
1149 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1153 source "drivers/cpuidle/Kconfig"
1157 menu "Floating point emulation"
1159 comment "At least one emulation must be selected"
1162 bool "NWFPE math emulation"
1163 depends on !AEABI || OABI_COMPAT
1165 Say Y to include the NWFPE floating point emulator in the kernel.
1166 This is necessary to run most binaries. Linux does not currently
1167 support floating point hardware so you need to say Y here even if
1168 your machine has an FPA or floating point co-processor podule.
1170 You may say N here if you are going to load the Acorn FPEmulator
1171 early in the bootup.
1174 bool "Support extended precision"
1175 depends on FPE_NWFPE
1177 Say Y to include 80-bit support in the kernel floating-point
1178 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1179 Note that gcc does not generate 80-bit operations by default,
1180 so in most cases this option only enlarges the size of the
1181 floating point emulator without any good reason.
1183 You almost surely want to say N here.
1186 bool "FastFPE math emulation (EXPERIMENTAL)"
1187 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1189 Say Y here to include the FAST floating point emulator in the kernel.
1190 This is an experimental much faster emulator which now also has full
1191 precision for the mantissa. It does not support any exceptions.
1192 It is very simple, and approximately 3-6 times faster than NWFPE.
1194 It should be sufficient for most programs. It may be not suitable
1195 for scientific calculations, but you have to check this for yourself.
1196 If you do not feel you need a faster FP emulation you should better
1200 bool "VFP-format floating point maths"
1201 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1203 Say Y to include VFP support code in the kernel. This is needed
1204 if your hardware includes a VFP unit.
1206 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1207 release notes and additional status information.
1209 Say N if your target does not have VFP hardware.
1217 bool "Advanced SIMD (NEON) Extension support"
1218 depends on VFPv3 && CPU_V7
1220 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1225 menu "Userspace binary formats"
1227 source "fs/Kconfig.binfmt"
1230 tristate "RISC OS personality"
1233 Say Y here to include the kernel code necessary if you want to run
1234 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1235 experimental; if this sounds frightening, say N and sleep in peace.
1236 You can also say M here to compile this support as a module (which
1237 will be called arthur).
1241 menu "Power management options"
1243 source "kernel/power/Kconfig"
1245 config ARCH_SUSPEND_POSSIBLE
1250 source "net/Kconfig"
1252 menu "Device Drivers"
1254 source "drivers/base/Kconfig"
1256 source "drivers/connector/Kconfig"
1258 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1259 source "drivers/mtd/Kconfig"
1262 source "drivers/parport/Kconfig"
1264 source "drivers/pnp/Kconfig"
1266 source "drivers/block/Kconfig"
1268 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1270 source "drivers/misc/Kconfig"
1272 source "drivers/ide/Kconfig"
1274 source "drivers/scsi/Kconfig"
1276 source "drivers/ata/Kconfig"
1278 source "drivers/md/Kconfig"
1280 source "drivers/message/fusion/Kconfig"
1282 source "drivers/ieee1394/Kconfig"
1284 source "drivers/message/i2o/Kconfig"
1286 source "drivers/net/Kconfig"
1288 source "drivers/isdn/Kconfig"
1290 # input before char - char/joystick depends on it. As does USB.
1292 source "drivers/input/Kconfig"
1294 source "drivers/char/Kconfig"
1296 source "drivers/i2c/Kconfig"
1298 source "drivers/spi/Kconfig"
1300 source "drivers/gpio/Kconfig"
1302 source "drivers/w1/Kconfig"
1304 source "drivers/power/Kconfig"
1306 source "drivers/hwmon/Kconfig"
1308 source "drivers/thermal/Kconfig"
1310 source "drivers/watchdog/Kconfig"
1312 source "drivers/ssb/Kconfig"
1314 #source "drivers/l3/Kconfig"
1316 source "drivers/mfd/Kconfig"
1318 source "drivers/media/Kconfig"
1320 source "drivers/video/Kconfig"
1322 source "sound/Kconfig"
1324 source "drivers/hid/Kconfig"
1326 source "drivers/usb/Kconfig"
1328 source "drivers/uwb/Kconfig"
1330 source "drivers/mmc/Kconfig"
1332 source "drivers/memstick/Kconfig"
1334 source "drivers/accessibility/Kconfig"
1336 source "drivers/leds/Kconfig"
1338 source "drivers/rtc/Kconfig"
1340 source "drivers/dma/Kconfig"
1342 source "drivers/dca/Kconfig"
1344 source "drivers/auxdisplay/Kconfig"
1346 source "drivers/regulator/Kconfig"
1348 source "drivers/uio/Kconfig"
1350 source "drivers/staging/Kconfig"
1356 source "arch/arm/Kconfig.debug"
1358 source "security/Kconfig"
1360 source "crypto/Kconfig"
1362 source "lib/Kconfig"