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.
257 bool "Cortina Systems Gemini"
260 select ARCH_REQUIRE_GPIOLIB
262 Support for the Cortina Systems Gemini family SoCs
270 This is an evaluation board for the StrongARM processor available
271 from Digital. It has limited hardware on-board, including an
272 Ethernet interface, two PCMCIA sockets, two serial ports and a
283 select ARCH_REQUIRE_GPIOLIB
285 This enables support for the Cirrus EP93xx series of CPUs.
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 "Freescale MXC/iMX-based"
298 select GENERIC_CLOCKEVENTS
301 select ARCH_REQUIRE_GPIOLIB
303 Support for Freescale MXC/iMX-based family of processors
306 bool "Hilscher NetX based"
309 select GENERIC_CLOCKEVENTS
312 This enables support for systems based on the Hilscher NetX Soc
315 bool "Hynix HMS720x-based"
319 This enables support for systems based on the Hynix HMS720x
326 select GENERIC_CLOCKEVENTS
328 Support for Motorola's i.MX family of processors (MX1, MXL).
336 select ARCH_SUPPORTS_MSI
339 Support for Intel's IOP13XX (XScale) family of processors.
348 select ARCH_REQUIRE_GPIOLIB
350 Support for Intel's 80219 and IOP32X (XScale) family of
360 select ARCH_REQUIRE_GPIOLIB
362 Support for Intel's IOP33X (XScale) family of processors.
370 Support for Intel's IXP23xx (XScale) family of processors.
373 bool "IXP2400/2800-based"
378 Support for Intel's IXP2400/2800 (XScale) family of processors.
386 select GENERIC_CLOCKEVENTS
387 select DMABOUNCE if PCI
389 Support for Intel's IXP4XX (XScale) family of processors.
396 Say Y here if you intend to run this kernel on a LinkUp Systems
397 L7200 Software Development Board which uses an ARM720T processor.
398 Information on this board can be obtained at:
400 <http://www.linkupsys.com/>
402 If you have any questions or comments about the Linux kernel port
403 to this board, send e-mail to <sjhill@cotw.com>.
406 bool "Marvell Kirkwood"
411 select GENERIC_CLOCKEVENTS
414 Support for the following Marvell Kirkwood series SoCs:
415 88F6180, 88F6192 and 88F6281.
418 bool "Marvell Loki (88RC8480)"
421 select GENERIC_CLOCKEVENTS
424 Support for the Marvell Loki (88RC8480) SoC.
427 bool "Marvell MV78xx0"
432 select GENERIC_CLOCKEVENTS
435 Support for the following Marvell MV78xx0 series SoCs:
445 select GENERIC_CLOCKEVENTS
448 Support for the following Marvell Orion 5x series SoCs:
449 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
450 Orion-2 (5281), Orion-1-90 (6183).
453 bool "Marvell PXA168/910"
456 select ARCH_REQUIRE_GPIOLIB
460 select GENERIC_CLOCKEVENTS
464 Support for Marvell's PXA168/910 processor line.
467 bool "Micrel/Kendin KS8695"
470 select ARCH_REQUIRE_GPIOLIB
472 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
473 System-on-Chip devices.
476 bool "NetSilicon NS9xxx"
480 select GENERIC_CLOCKEVENTS
483 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
486 <http://www.digi.com/products/microprocessors/index.jsp>
489 bool "Nuvoton W90X900 CPU"
491 select ARCH_REQUIRE_GPIOLIB
495 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
496 can login www.mcuos.com or www.nuvoton.com to know more.
499 bool "Philips Nexperia PNX4008 Mobile"
503 This enables support for Philips PNX4008 mobile platform.
506 bool "PXA2xx/PXA3xx-based"
512 select ARCH_REQUIRE_GPIOLIB
516 select GENERIC_CLOCKEVENTS
520 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
526 select GENERIC_CLOCKEVENTS
528 Support for Qualcomm MSM7K based systems. This runs on the ARM11
529 apps processor of the MSM7K and depends on a shared memory
530 interface to the ARM9 modem processor which runs the baseband stack
531 and controls some vital subsystems (clock and power control, etc).
538 select ARCH_MAY_HAVE_PC_FDC
539 select HAVE_PATA_PLATFORM
542 select ARCH_SPARSEMEM_ENABLE
544 On the Acorn Risc-PC, Linux can support the internal IDE disk and
545 CD-ROM interface, serial and parallel port, and the floppy drive.
551 select ARCH_SPARSEMEM_ENABLE
555 select GENERIC_CLOCKEVENTS
558 select ARCH_REQUIRE_GPIOLIB
560 Support for StrongARM 11x0 based boards.
563 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
567 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
568 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
569 the Samsung SMDK2410 development board (and derivatives).
572 bool "Samsung S3C64XX"
576 Samsung S3C64XX series based systems
586 Support for the StrongARM based Digital DNARD machine, also known
587 as "Shark" (<http://www.shark-linux.de/shark.html>).
592 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
593 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
595 Say Y here for systems based on one of the Sharp LH7A40X
596 System on a Chip processors. These CPUs include an ARM922T
597 core with a wide array of integrated devices for
598 hand-held and low-power applications.
604 select GENERIC_CLOCKEVENTS
606 select ARCH_REQUIRE_GPIOLIB
610 Support for TI's DaVinci platform.
616 select ARCH_REQUIRE_GPIOLIB
618 select GENERIC_CLOCKEVENTS
620 Support for TI's OMAP platform (OMAP1 and OMAP2).
624 source "arch/arm/mach-clps711x/Kconfig"
626 source "arch/arm/mach-ep93xx/Kconfig"
628 source "arch/arm/mach-footbridge/Kconfig"
630 source "arch/arm/mach-gemini/Kconfig"
632 source "arch/arm/mach-integrator/Kconfig"
634 source "arch/arm/mach-iop32x/Kconfig"
636 source "arch/arm/mach-iop33x/Kconfig"
638 source "arch/arm/mach-iop13xx/Kconfig"
640 source "arch/arm/mach-ixp4xx/Kconfig"
642 source "arch/arm/mach-ixp2000/Kconfig"
644 source "arch/arm/mach-ixp23xx/Kconfig"
646 source "arch/arm/mach-loki/Kconfig"
648 source "arch/arm/mach-mv78xx0/Kconfig"
650 source "arch/arm/mach-pxa/Kconfig"
651 source "arch/arm/plat-pxa/Kconfig"
653 source "arch/arm/mach-mmp/Kconfig"
655 source "arch/arm/mach-sa1100/Kconfig"
657 source "arch/arm/plat-omap/Kconfig"
659 source "arch/arm/mach-omap1/Kconfig"
661 source "arch/arm/mach-omap2/Kconfig"
663 source "arch/arm/mach-orion5x/Kconfig"
665 source "arch/arm/mach-kirkwood/Kconfig"
667 source "arch/arm/plat-s3c24xx/Kconfig"
668 source "arch/arm/plat-s3c64xx/Kconfig"
669 source "arch/arm/plat-s3c/Kconfig"
672 source "arch/arm/mach-s3c2400/Kconfig"
673 source "arch/arm/mach-s3c2410/Kconfig"
674 source "arch/arm/mach-s3c2412/Kconfig"
675 source "arch/arm/mach-s3c2440/Kconfig"
676 source "arch/arm/mach-s3c2442/Kconfig"
677 source "arch/arm/mach-s3c2443/Kconfig"
681 source "arch/arm/mach-s3c6400/Kconfig"
682 source "arch/arm/mach-s3c6410/Kconfig"
685 source "arch/arm/mach-lh7a40x/Kconfig"
687 source "arch/arm/mach-imx/Kconfig"
689 source "arch/arm/mach-h720x/Kconfig"
691 source "arch/arm/mach-versatile/Kconfig"
693 source "arch/arm/mach-aaec2000/Kconfig"
695 source "arch/arm/mach-realview/Kconfig"
697 source "arch/arm/mach-at91/Kconfig"
699 source "arch/arm/plat-mxc/Kconfig"
701 source "arch/arm/mach-netx/Kconfig"
703 source "arch/arm/mach-ns9xxx/Kconfig"
705 source "arch/arm/mach-davinci/Kconfig"
707 source "arch/arm/mach-ks8695/Kconfig"
709 source "arch/arm/mach-msm/Kconfig"
711 source "arch/arm/mach-w90x900/Kconfig"
713 # Definitions to make life easier
726 source arch/arm/mm/Kconfig
729 bool "Enable iWMMXt support"
730 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
731 default y if PXA27x || PXA3xx || ARCH_MMP
733 Enable support for iWMMXt context switching at run time if
734 running on a CPU that supports it.
736 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
739 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
743 source "arch/arm/Kconfig-nommu"
748 source "arch/arm/common/Kconfig"
750 config FORCE_MAX_ZONEORDER
763 Find out whether you have ISA slots on your motherboard. ISA is the
764 name of a bus system, i.e. the way the CPU talks to the other stuff
765 inside your box. Other bus systems are PCI, EISA, MicroChannel
766 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
767 newer boards don't support it. If you have ISA, say Y, otherwise N.
769 # Select ISA DMA controller support
774 # Select ISA DMA interface
779 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
781 Find out whether you have a PCI motherboard. PCI is the name of a
782 bus system, i.e. the way the CPU talks to the other stuff inside
783 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
784 VESA. If you have PCI, say Y, otherwise N.
789 # Select the host bridge type
790 config PCI_HOST_VIA82C505
792 depends on PCI && ARCH_SHARK
795 config PCI_HOST_ITE8152
797 depends on PCI && MACH_ARMCORE
801 source "drivers/pci/Kconfig"
803 source "drivers/pcmcia/Kconfig"
807 menu "Kernel Features"
809 source "kernel/time/Kconfig"
812 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
813 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
814 select USE_GENERIC_SMP_HELPERS
816 This enables support for systems with more than one CPU. If you have
817 a system with only one CPU, like most personal computers, say N. If
818 you have a system with more than one CPU, say Y.
820 If you say N here, the kernel will run on single and multiprocessor
821 machines, but will use only one CPU of a multiprocessor machine. If
822 you say Y here, the kernel will run on many, but not all, single
823 processor machines. On a single processor machine, the kernel will
824 run faster if you say N here.
826 See also <file:Documentation/i386/IO-APIC.txt>,
827 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
828 <http://www.linuxdoc.org/docs.html#howto>.
830 If you don't know what to do here, say N.
833 prompt "Memory split"
836 Select the desired split between kernel and user memory.
838 If you are not absolutely sure what you are doing, leave this
842 bool "3G/1G user/kernel split"
844 bool "2G/2G user/kernel split"
846 bool "1G/3G user/kernel split"
851 default 0x40000000 if VMSPLIT_1G
852 default 0x80000000 if VMSPLIT_2G
856 int "Maximum number of CPUs (2-32)"
862 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
863 depends on SMP && HOTPLUG && EXPERIMENTAL
865 Say Y here to experiment with turning CPUs off and on. CPUs
866 can be controlled through /sys/devices/system/cpu.
869 bool "Use local timer interrupts"
870 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
873 Enable support for local timers on SMP platforms, rather then the
874 legacy IPI broadcast method. Local timers allows the system
875 accounting to be spread across the timer interval, preventing a
876 "thundering herd" at every timer tick.
879 bool "Preemptible Kernel (EXPERIMENTAL)"
880 depends on EXPERIMENTAL
882 This option reduces the latency of the kernel when reacting to
883 real-time or interactive events by allowing a low priority process to
884 be preempted even if it is in kernel mode executing a system call.
885 This allows applications to run more reliably even when the system is
888 Say Y here if you are building a kernel for a desktop, embedded
889 or real-time system. Say N if you are unsure.
893 default 128 if ARCH_L7200
894 default 200 if ARCH_EBSA110 || ARCH_S3C2410
895 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
896 default AT91_TIMER_HZ if ARCH_AT91
900 bool "Use the ARM EABI to compile the kernel"
902 This option allows for the kernel to be compiled using the latest
903 ARM ABI (aka EABI). This is only useful if you are using a user
904 space environment that is also compiled with EABI.
906 Since there are major incompatibilities between the legacy ABI and
907 EABI, especially with regard to structure member alignment, this
908 option also changes the kernel syscall calling convention to
909 disambiguate both ABIs and allow for backward compatibility support
910 (selected with CONFIG_OABI_COMPAT).
912 To use this you need GCC version 4.0.0 or later.
915 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
916 depends on AEABI && EXPERIMENTAL
919 This option preserves the old syscall interface along with the
920 new (ARM EABI) one. It also provides a compatibility layer to
921 intercept syscalls that have structure arguments which layout
922 in memory differs between the legacy ABI and the new ARM EABI
923 (only for non "thumb" binaries). This option adds a tiny
924 overhead to all syscalls and produces a slightly larger kernel.
925 If you know you'll be using only pure EABI user space then you
926 can say N here. If this option is not selected and you attempt
927 to execute a legacy ABI binary then the result will be
928 UNPREDICTABLE (in fact it can be predicted that it won't work
929 at all). If in doubt say Y.
931 config ARCH_FLATMEM_HAS_HOLES
936 # Discontigmem is deprecated
937 config ARCH_DISCONTIGMEM_ENABLE
940 config ARCH_SPARSEMEM_ENABLE
943 config ARCH_SPARSEMEM_DEFAULT
944 def_bool ARCH_SPARSEMEM_ENABLE
946 config ARCH_SELECT_MEMORY_MODEL
947 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
951 default "4" if ARCH_LH7A40X
953 depends on NEED_MULTIPLE_NODES
956 bool "High Memory Support (EXPERIMENTAL)"
957 depends on MMU && EXPERIMENTAL
959 The address space of ARM processors is only 4 Gigabytes large
960 and it has to accommodate user address space, kernel address
961 space as well as some memory mapped IO. That means that, if you
962 have a large amount of physical memory and/or IO, not all of the
963 memory can be "permanently mapped" by the kernel. The physical
964 memory that is not permanently mapped is called "high memory".
966 Depending on the selected kernel/user memory split, minimum
967 vmalloc space and actual amount of RAM, you may not need this
968 option which should result in a slightly faster kernel.
975 bool "Timer and CPU usage LEDs"
976 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
977 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
978 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
979 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
980 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
981 ARCH_AT91 || ARCH_DAVINCI || \
982 ARCH_KS8695 || MACH_RD88F5182
984 If you say Y here, the LEDs on your machine will be used
985 to provide useful information about your current system status.
987 If you are compiling a kernel for a NetWinder or EBSA-285, you will
988 be able to select which LEDs are active using the options below. If
989 you are compiling a kernel for the EBSA-110 or the LART however, the
990 red LED will simply flash regularly to indicate that the system is
991 still functional. It is safe to say Y here if you have a CATS
992 system, but the driver will do nothing.
995 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
996 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
997 || MACH_OMAP_PERSEUS2
999 depends on !GENERIC_CLOCKEVENTS
1000 default y if ARCH_EBSA110
1002 If you say Y here, one of the system LEDs (the green one on the
1003 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1004 will flash regularly to indicate that the system is still
1005 operational. This is mainly useful to kernel hackers who are
1006 debugging unstable kernels.
1008 The LART uses the same LED for both Timer LED and CPU usage LED
1009 functions. You may choose to use both, but the Timer LED function
1010 will overrule the CPU usage LED.
1013 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1015 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1016 || MACH_OMAP_PERSEUS2
1019 If you say Y here, the red LED will be used to give a good real
1020 time indication of CPU usage, by lighting whenever the idle task
1021 is not currently executing.
1023 The LART uses the same LED for both Timer LED and CPU usage LED
1024 functions. You may choose to use both, but the Timer LED function
1025 will overrule the CPU usage LED.
1027 config ALIGNMENT_TRAP
1029 depends on CPU_CP15_MMU
1030 default y if !ARCH_EBSA110
1032 ARM processors cannot fetch/store information which is not
1033 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1034 address divisible by 4. On 32-bit ARM processors, these non-aligned
1035 fetch/store instructions will be emulated in software if you say
1036 here, which has a severe performance impact. This is necessary for
1037 correct operation of some network protocols. With an IP-only
1038 configuration it is safe to say N, otherwise say Y.
1044 # Compressed boot loader in ROM. Yes, we really want to ask about
1045 # TEXT and BSS so we preserve their values in the config files.
1046 config ZBOOT_ROM_TEXT
1047 hex "Compressed ROM boot loader base address"
1050 The physical address at which the ROM-able zImage is to be
1051 placed in the target. Platforms which normally make use of
1052 ROM-able zImage formats normally set this to a suitable
1053 value in their defconfig file.
1055 If ZBOOT_ROM is not enabled, this has no effect.
1057 config ZBOOT_ROM_BSS
1058 hex "Compressed ROM boot loader BSS address"
1061 The base address of an area of read/write memory in the target
1062 for the ROM-able zImage which must be available while the
1063 decompressor is running. It must be large enough to hold the
1064 entire decompressed kernel plus an additional 128 KiB.
1065 Platforms which normally make use of ROM-able zImage formats
1066 normally set this to a suitable value in their defconfig file.
1068 If ZBOOT_ROM is not enabled, this has no effect.
1071 bool "Compressed boot loader in ROM/flash"
1072 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1074 Say Y here if you intend to execute your compressed kernel image
1075 (zImage) directly from ROM or flash. If unsure, say N.
1078 string "Default kernel command string"
1081 On some architectures (EBSA110 and CATS), there is currently no way
1082 for the boot loader to pass arguments to the kernel. For these
1083 architectures, you should supply some command-line options at build
1084 time by entering them here. As a minimum, you should specify the
1085 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1088 bool "Kernel Execute-In-Place from ROM"
1089 depends on !ZBOOT_ROM
1091 Execute-In-Place allows the kernel to run from non-volatile storage
1092 directly addressable by the CPU, such as NOR flash. This saves RAM
1093 space since the text section of the kernel is not loaded from flash
1094 to RAM. Read-write sections, such as the data section and stack,
1095 are still copied to RAM. The XIP kernel is not compressed since
1096 it has to run directly from flash, so it will take more space to
1097 store it. The flash address used to link the kernel object files,
1098 and for storing it, is configuration dependent. Therefore, if you
1099 say Y here, you must know the proper physical address where to
1100 store the kernel image depending on your own flash memory usage.
1102 Also note that the make target becomes "make xipImage" rather than
1103 "make zImage" or "make Image". The final kernel binary to put in
1104 ROM memory will be arch/arm/boot/xipImage.
1108 config XIP_PHYS_ADDR
1109 hex "XIP Kernel Physical Location"
1110 depends on XIP_KERNEL
1111 default "0x00080000"
1113 This is the physical address in your flash memory the kernel will
1114 be linked for and stored to. This address is dependent on your
1118 bool "Kexec system call (EXPERIMENTAL)"
1119 depends on EXPERIMENTAL
1121 kexec is a system call that implements the ability to shutdown your
1122 current kernel, and to start another kernel. It is like a reboot
1123 but it is independent of the system firmware. And like a reboot
1124 you can start any kernel with it, not just Linux.
1126 It is an ongoing process to be certain the hardware in a machine
1127 is properly shutdown, so do not be surprised if this code does not
1128 initially work for you. It may help to enable device hotplugging
1132 bool "Export atags in procfs"
1136 Should the atags used to boot the kernel be exported in an "atags"
1137 file in procfs. Useful with kexec.
1141 menu "CPU Power Management"
1143 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1145 source "drivers/cpufreq/Kconfig"
1147 config CPU_FREQ_SA1100
1149 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1152 config CPU_FREQ_SA1110
1154 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1157 config CPU_FREQ_INTEGRATOR
1158 tristate "CPUfreq driver for ARM Integrator CPUs"
1159 depends on ARCH_INTEGRATOR && CPU_FREQ
1162 This enables the CPUfreq driver for ARM Integrator CPUs.
1164 For details, take a look at <file:Documentation/cpu-freq>.
1169 tristate "CPUfreq driver for i.MX CPUs"
1170 depends on ARCH_IMX && CPU_FREQ
1173 This enables the CPUfreq driver for i.MX CPUs.
1179 depends on CPU_FREQ && ARCH_PXA && PXA25x
1181 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1185 source "drivers/cpuidle/Kconfig"
1189 menu "Floating point emulation"
1191 comment "At least one emulation must be selected"
1194 bool "NWFPE math emulation"
1195 depends on !AEABI || OABI_COMPAT
1197 Say Y to include the NWFPE floating point emulator in the kernel.
1198 This is necessary to run most binaries. Linux does not currently
1199 support floating point hardware so you need to say Y here even if
1200 your machine has an FPA or floating point co-processor podule.
1202 You may say N here if you are going to load the Acorn FPEmulator
1203 early in the bootup.
1206 bool "Support extended precision"
1207 depends on FPE_NWFPE
1209 Say Y to include 80-bit support in the kernel floating-point
1210 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1211 Note that gcc does not generate 80-bit operations by default,
1212 so in most cases this option only enlarges the size of the
1213 floating point emulator without any good reason.
1215 You almost surely want to say N here.
1218 bool "FastFPE math emulation (EXPERIMENTAL)"
1219 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1221 Say Y here to include the FAST floating point emulator in the kernel.
1222 This is an experimental much faster emulator which now also has full
1223 precision for the mantissa. It does not support any exceptions.
1224 It is very simple, and approximately 3-6 times faster than NWFPE.
1226 It should be sufficient for most programs. It may be not suitable
1227 for scientific calculations, but you have to check this for yourself.
1228 If you do not feel you need a faster FP emulation you should better
1232 bool "VFP-format floating point maths"
1233 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1235 Say Y to include VFP support code in the kernel. This is needed
1236 if your hardware includes a VFP unit.
1238 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1239 release notes and additional status information.
1241 Say N if your target does not have VFP hardware.
1249 bool "Advanced SIMD (NEON) Extension support"
1250 depends on VFPv3 && CPU_V7
1252 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1257 menu "Userspace binary formats"
1259 source "fs/Kconfig.binfmt"
1262 tristate "RISC OS personality"
1265 Say Y here to include the kernel code necessary if you want to run
1266 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1267 experimental; if this sounds frightening, say N and sleep in peace.
1268 You can also say M here to compile this support as a module (which
1269 will be called arthur).
1273 menu "Power management options"
1275 source "kernel/power/Kconfig"
1277 config ARCH_SUSPEND_POSSIBLE
1282 source "net/Kconfig"
1284 menu "Device Drivers"
1286 source "drivers/base/Kconfig"
1288 source "drivers/connector/Kconfig"
1290 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1291 source "drivers/mtd/Kconfig"
1294 source "drivers/parport/Kconfig"
1296 source "drivers/pnp/Kconfig"
1298 source "drivers/block/Kconfig"
1300 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1302 source "drivers/misc/Kconfig"
1304 source "drivers/ide/Kconfig"
1306 source "drivers/scsi/Kconfig"
1308 source "drivers/ata/Kconfig"
1310 source "drivers/md/Kconfig"
1312 source "drivers/message/fusion/Kconfig"
1314 source "drivers/ieee1394/Kconfig"
1316 source "drivers/message/i2o/Kconfig"
1318 source "drivers/net/Kconfig"
1320 source "drivers/isdn/Kconfig"
1322 # input before char - char/joystick depends on it. As does USB.
1324 source "drivers/input/Kconfig"
1326 source "drivers/char/Kconfig"
1328 source "drivers/i2c/Kconfig"
1330 source "drivers/spi/Kconfig"
1332 source "drivers/gpio/Kconfig"
1334 source "drivers/w1/Kconfig"
1336 source "drivers/power/Kconfig"
1338 source "drivers/hwmon/Kconfig"
1340 source "drivers/thermal/Kconfig"
1342 source "drivers/watchdog/Kconfig"
1344 source "drivers/ssb/Kconfig"
1346 #source "drivers/l3/Kconfig"
1348 source "drivers/mfd/Kconfig"
1350 source "drivers/media/Kconfig"
1352 source "drivers/video/Kconfig"
1354 source "sound/Kconfig"
1356 source "drivers/hid/Kconfig"
1358 source "drivers/usb/Kconfig"
1360 source "drivers/uwb/Kconfig"
1362 source "drivers/mmc/Kconfig"
1364 source "drivers/memstick/Kconfig"
1366 source "drivers/accessibility/Kconfig"
1368 source "drivers/leds/Kconfig"
1370 source "drivers/rtc/Kconfig"
1372 source "drivers/dma/Kconfig"
1374 source "drivers/dca/Kconfig"
1376 source "drivers/auxdisplay/Kconfig"
1378 source "drivers/regulator/Kconfig"
1380 source "drivers/uio/Kconfig"
1382 source "drivers/staging/Kconfig"
1388 source "arch/arm/Kconfig.debug"
1390 source "security/Kconfig"
1392 source "crypto/Kconfig"
1394 source "lib/Kconfig"