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"
492 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
493 can login www.mcuos.com or www.nuvoton.com to know more.
496 bool "Philips Nexperia PNX4008 Mobile"
500 This enables support for Philips PNX4008 mobile platform.
503 bool "PXA2xx/PXA3xx-based"
509 select ARCH_REQUIRE_GPIOLIB
513 select GENERIC_CLOCKEVENTS
517 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
523 select GENERIC_CLOCKEVENTS
525 Support for Qualcomm MSM7K based systems. This runs on the ARM11
526 apps processor of the MSM7K and depends on a shared memory
527 interface to the ARM9 modem processor which runs the baseband stack
528 and controls some vital subsystems (clock and power control, etc).
535 select ARCH_MAY_HAVE_PC_FDC
536 select HAVE_PATA_PLATFORM
539 select ARCH_SPARSEMEM_ENABLE
541 On the Acorn Risc-PC, Linux can support the internal IDE disk and
542 CD-ROM interface, serial and parallel port, and the floppy drive.
548 select ARCH_SPARSEMEM_ENABLE
552 select GENERIC_CLOCKEVENTS
555 select ARCH_REQUIRE_GPIOLIB
557 Support for StrongARM 11x0 based boards.
560 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
564 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
565 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
566 the Samsung SMDK2410 development board (and derivatives).
569 bool "Samsung S3C64XX"
573 Samsung S3C64XX series based systems
583 Support for the StrongARM based Digital DNARD machine, also known
584 as "Shark" (<http://www.shark-linux.de/shark.html>).
589 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
590 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
592 Say Y here for systems based on one of the Sharp LH7A40X
593 System on a Chip processors. These CPUs include an ARM922T
594 core with a wide array of integrated devices for
595 hand-held and low-power applications.
598 bool "ST-Ericsson U300 Series"
604 select GENERIC_CLOCKEVENTS
609 Support for ST-Ericsson U300 series mobile platforms.
615 select GENERIC_CLOCKEVENTS
617 select ARCH_REQUIRE_GPIOLIB
621 Support for TI's DaVinci platform.
627 select ARCH_REQUIRE_GPIOLIB
629 select GENERIC_CLOCKEVENTS
631 Support for TI's OMAP platform (OMAP1 and OMAP2).
635 source "arch/arm/mach-clps711x/Kconfig"
637 source "arch/arm/mach-ep93xx/Kconfig"
639 source "arch/arm/mach-footbridge/Kconfig"
641 source "arch/arm/mach-gemini/Kconfig"
643 source "arch/arm/mach-integrator/Kconfig"
645 source "arch/arm/mach-iop32x/Kconfig"
647 source "arch/arm/mach-iop33x/Kconfig"
649 source "arch/arm/mach-iop13xx/Kconfig"
651 source "arch/arm/mach-ixp4xx/Kconfig"
653 source "arch/arm/mach-ixp2000/Kconfig"
655 source "arch/arm/mach-ixp23xx/Kconfig"
657 source "arch/arm/mach-loki/Kconfig"
659 source "arch/arm/mach-mv78xx0/Kconfig"
661 source "arch/arm/mach-pxa/Kconfig"
662 source "arch/arm/plat-pxa/Kconfig"
664 source "arch/arm/mach-mmp/Kconfig"
666 source "arch/arm/mach-sa1100/Kconfig"
668 source "arch/arm/plat-omap/Kconfig"
670 source "arch/arm/mach-omap1/Kconfig"
672 source "arch/arm/mach-omap2/Kconfig"
674 source "arch/arm/mach-orion5x/Kconfig"
676 source "arch/arm/mach-kirkwood/Kconfig"
678 source "arch/arm/plat-s3c24xx/Kconfig"
679 source "arch/arm/plat-s3c64xx/Kconfig"
680 source "arch/arm/plat-s3c/Kconfig"
683 source "arch/arm/mach-s3c2400/Kconfig"
684 source "arch/arm/mach-s3c2410/Kconfig"
685 source "arch/arm/mach-s3c2412/Kconfig"
686 source "arch/arm/mach-s3c2440/Kconfig"
687 source "arch/arm/mach-s3c2442/Kconfig"
688 source "arch/arm/mach-s3c2443/Kconfig"
692 source "arch/arm/mach-s3c6400/Kconfig"
693 source "arch/arm/mach-s3c6410/Kconfig"
696 source "arch/arm/mach-lh7a40x/Kconfig"
698 source "arch/arm/mach-imx/Kconfig"
700 source "arch/arm/mach-h720x/Kconfig"
702 source "arch/arm/mach-versatile/Kconfig"
704 source "arch/arm/mach-aaec2000/Kconfig"
706 source "arch/arm/mach-realview/Kconfig"
708 source "arch/arm/mach-at91/Kconfig"
710 source "arch/arm/plat-mxc/Kconfig"
712 source "arch/arm/mach-netx/Kconfig"
714 source "arch/arm/mach-ns9xxx/Kconfig"
716 source "arch/arm/mach-davinci/Kconfig"
718 source "arch/arm/mach-ks8695/Kconfig"
720 source "arch/arm/mach-msm/Kconfig"
722 source "arch/arm/mach-u300/Kconfig"
724 source "arch/arm/mach-w90x900/Kconfig"
726 # Definitions to make life easier
739 source arch/arm/mm/Kconfig
742 bool "Enable iWMMXt support"
743 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
744 default y if PXA27x || PXA3xx || ARCH_MMP
746 Enable support for iWMMXt context switching at run time if
747 running on a CPU that supports it.
749 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
752 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
756 source "arch/arm/Kconfig-nommu"
761 source "arch/arm/common/Kconfig"
763 config FORCE_MAX_ZONEORDER
776 Find out whether you have ISA slots on your motherboard. ISA is the
777 name of a bus system, i.e. the way the CPU talks to the other stuff
778 inside your box. Other bus systems are PCI, EISA, MicroChannel
779 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
780 newer boards don't support it. If you have ISA, say Y, otherwise N.
782 # Select ISA DMA controller support
787 # Select ISA DMA interface
792 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
794 Find out whether you have a PCI motherboard. PCI is the name of a
795 bus system, i.e. the way the CPU talks to the other stuff inside
796 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
797 VESA. If you have PCI, say Y, otherwise N.
802 # Select the host bridge type
803 config PCI_HOST_VIA82C505
805 depends on PCI && ARCH_SHARK
808 config PCI_HOST_ITE8152
810 depends on PCI && MACH_ARMCORE
814 source "drivers/pci/Kconfig"
816 source "drivers/pcmcia/Kconfig"
820 menu "Kernel Features"
822 source "kernel/time/Kconfig"
825 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
826 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
827 select USE_GENERIC_SMP_HELPERS
829 This enables support for systems with more than one CPU. If you have
830 a system with only one CPU, like most personal computers, say N. If
831 you have a system with more than one CPU, say Y.
833 If you say N here, the kernel will run on single and multiprocessor
834 machines, but will use only one CPU of a multiprocessor machine. If
835 you say Y here, the kernel will run on many, but not all, single
836 processor machines. On a single processor machine, the kernel will
837 run faster if you say N here.
839 See also <file:Documentation/i386/IO-APIC.txt>,
840 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
841 <http://www.linuxdoc.org/docs.html#howto>.
843 If you don't know what to do here, say N.
846 prompt "Memory split"
849 Select the desired split between kernel and user memory.
851 If you are not absolutely sure what you are doing, leave this
855 bool "3G/1G user/kernel split"
857 bool "2G/2G user/kernel split"
859 bool "1G/3G user/kernel split"
864 default 0x40000000 if VMSPLIT_1G
865 default 0x80000000 if VMSPLIT_2G
869 int "Maximum number of CPUs (2-32)"
875 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
876 depends on SMP && HOTPLUG && EXPERIMENTAL
878 Say Y here to experiment with turning CPUs off and on. CPUs
879 can be controlled through /sys/devices/system/cpu.
882 bool "Use local timer interrupts"
883 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
886 Enable support for local timers on SMP platforms, rather then the
887 legacy IPI broadcast method. Local timers allows the system
888 accounting to be spread across the timer interval, preventing a
889 "thundering herd" at every timer tick.
892 bool "Preemptible Kernel (EXPERIMENTAL)"
893 depends on EXPERIMENTAL
895 This option reduces the latency of the kernel when reacting to
896 real-time or interactive events by allowing a low priority process to
897 be preempted even if it is in kernel mode executing a system call.
898 This allows applications to run more reliably even when the system is
901 Say Y here if you are building a kernel for a desktop, embedded
902 or real-time system. Say N if you are unsure.
906 default 128 if ARCH_L7200
907 default 200 if ARCH_EBSA110 || ARCH_S3C2410
908 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
909 default AT91_TIMER_HZ if ARCH_AT91
913 bool "Use the ARM EABI to compile the kernel"
915 This option allows for the kernel to be compiled using the latest
916 ARM ABI (aka EABI). This is only useful if you are using a user
917 space environment that is also compiled with EABI.
919 Since there are major incompatibilities between the legacy ABI and
920 EABI, especially with regard to structure member alignment, this
921 option also changes the kernel syscall calling convention to
922 disambiguate both ABIs and allow for backward compatibility support
923 (selected with CONFIG_OABI_COMPAT).
925 To use this you need GCC version 4.0.0 or later.
928 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
929 depends on AEABI && EXPERIMENTAL
932 This option preserves the old syscall interface along with the
933 new (ARM EABI) one. It also provides a compatibility layer to
934 intercept syscalls that have structure arguments which layout
935 in memory differs between the legacy ABI and the new ARM EABI
936 (only for non "thumb" binaries). This option adds a tiny
937 overhead to all syscalls and produces a slightly larger kernel.
938 If you know you'll be using only pure EABI user space then you
939 can say N here. If this option is not selected and you attempt
940 to execute a legacy ABI binary then the result will be
941 UNPREDICTABLE (in fact it can be predicted that it won't work
942 at all). If in doubt say Y.
944 config ARCH_FLATMEM_HAS_HOLES
949 # Discontigmem is deprecated
950 config ARCH_DISCONTIGMEM_ENABLE
953 config ARCH_SPARSEMEM_ENABLE
956 config ARCH_SPARSEMEM_DEFAULT
957 def_bool ARCH_SPARSEMEM_ENABLE
959 config ARCH_SELECT_MEMORY_MODEL
960 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
964 default "4" if ARCH_LH7A40X
966 depends on NEED_MULTIPLE_NODES
969 bool "High Memory Support (EXPERIMENTAL)"
970 depends on MMU && EXPERIMENTAL
972 The address space of ARM processors is only 4 Gigabytes large
973 and it has to accommodate user address space, kernel address
974 space as well as some memory mapped IO. That means that, if you
975 have a large amount of physical memory and/or IO, not all of the
976 memory can be "permanently mapped" by the kernel. The physical
977 memory that is not permanently mapped is called "high memory".
979 Depending on the selected kernel/user memory split, minimum
980 vmalloc space and actual amount of RAM, you may not need this
981 option which should result in a slightly faster kernel.
988 bool "Timer and CPU usage LEDs"
989 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
990 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
991 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
992 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
993 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
994 ARCH_AT91 || ARCH_DAVINCI || \
995 ARCH_KS8695 || MACH_RD88F5182
997 If you say Y here, the LEDs on your machine will be used
998 to provide useful information about your current system status.
1000 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1001 be able to select which LEDs are active using the options below. If
1002 you are compiling a kernel for the EBSA-110 or the LART however, the
1003 red LED will simply flash regularly to indicate that the system is
1004 still functional. It is safe to say Y here if you have a CATS
1005 system, but the driver will do nothing.
1008 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1009 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1010 || MACH_OMAP_PERSEUS2
1012 depends on !GENERIC_CLOCKEVENTS
1013 default y if ARCH_EBSA110
1015 If you say Y here, one of the system LEDs (the green one on the
1016 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1017 will flash regularly to indicate that the system is still
1018 operational. This is mainly useful to kernel hackers who are
1019 debugging unstable kernels.
1021 The LART uses the same LED for both Timer LED and CPU usage LED
1022 functions. You may choose to use both, but the Timer LED function
1023 will overrule the CPU usage LED.
1026 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1028 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1029 || MACH_OMAP_PERSEUS2
1032 If you say Y here, the red LED will be used to give a good real
1033 time indication of CPU usage, by lighting whenever the idle task
1034 is not currently executing.
1036 The LART uses the same LED for both Timer LED and CPU usage LED
1037 functions. You may choose to use both, but the Timer LED function
1038 will overrule the CPU usage LED.
1040 config ALIGNMENT_TRAP
1042 depends on CPU_CP15_MMU
1043 default y if !ARCH_EBSA110
1045 ARM processors cannot fetch/store information which is not
1046 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1047 address divisible by 4. On 32-bit ARM processors, these non-aligned
1048 fetch/store instructions will be emulated in software if you say
1049 here, which has a severe performance impact. This is necessary for
1050 correct operation of some network protocols. With an IP-only
1051 configuration it is safe to say N, otherwise say Y.
1057 # Compressed boot loader in ROM. Yes, we really want to ask about
1058 # TEXT and BSS so we preserve their values in the config files.
1059 config ZBOOT_ROM_TEXT
1060 hex "Compressed ROM boot loader base address"
1063 The physical address at which the ROM-able zImage is to be
1064 placed in the target. Platforms which normally make use of
1065 ROM-able zImage formats normally set this to a suitable
1066 value in their defconfig file.
1068 If ZBOOT_ROM is not enabled, this has no effect.
1070 config ZBOOT_ROM_BSS
1071 hex "Compressed ROM boot loader BSS address"
1074 The base address of an area of read/write memory in the target
1075 for the ROM-able zImage which must be available while the
1076 decompressor is running. It must be large enough to hold the
1077 entire decompressed kernel plus an additional 128 KiB.
1078 Platforms which normally make use of ROM-able zImage formats
1079 normally set this to a suitable value in their defconfig file.
1081 If ZBOOT_ROM is not enabled, this has no effect.
1084 bool "Compressed boot loader in ROM/flash"
1085 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1087 Say Y here if you intend to execute your compressed kernel image
1088 (zImage) directly from ROM or flash. If unsure, say N.
1091 string "Default kernel command string"
1094 On some architectures (EBSA110 and CATS), there is currently no way
1095 for the boot loader to pass arguments to the kernel. For these
1096 architectures, you should supply some command-line options at build
1097 time by entering them here. As a minimum, you should specify the
1098 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1101 bool "Kernel Execute-In-Place from ROM"
1102 depends on !ZBOOT_ROM
1104 Execute-In-Place allows the kernel to run from non-volatile storage
1105 directly addressable by the CPU, such as NOR flash. This saves RAM
1106 space since the text section of the kernel is not loaded from flash
1107 to RAM. Read-write sections, such as the data section and stack,
1108 are still copied to RAM. The XIP kernel is not compressed since
1109 it has to run directly from flash, so it will take more space to
1110 store it. The flash address used to link the kernel object files,
1111 and for storing it, is configuration dependent. Therefore, if you
1112 say Y here, you must know the proper physical address where to
1113 store the kernel image depending on your own flash memory usage.
1115 Also note that the make target becomes "make xipImage" rather than
1116 "make zImage" or "make Image". The final kernel binary to put in
1117 ROM memory will be arch/arm/boot/xipImage.
1121 config XIP_PHYS_ADDR
1122 hex "XIP Kernel Physical Location"
1123 depends on XIP_KERNEL
1124 default "0x00080000"
1126 This is the physical address in your flash memory the kernel will
1127 be linked for and stored to. This address is dependent on your
1131 bool "Kexec system call (EXPERIMENTAL)"
1132 depends on EXPERIMENTAL
1134 kexec is a system call that implements the ability to shutdown your
1135 current kernel, and to start another kernel. It is like a reboot
1136 but it is independent of the system firmware. And like a reboot
1137 you can start any kernel with it, not just Linux.
1139 It is an ongoing process to be certain the hardware in a machine
1140 is properly shutdown, so do not be surprised if this code does not
1141 initially work for you. It may help to enable device hotplugging
1145 bool "Export atags in procfs"
1149 Should the atags used to boot the kernel be exported in an "atags"
1150 file in procfs. Useful with kexec.
1154 menu "CPU Power Management"
1156 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1158 source "drivers/cpufreq/Kconfig"
1160 config CPU_FREQ_SA1100
1162 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1165 config CPU_FREQ_SA1110
1167 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1170 config CPU_FREQ_INTEGRATOR
1171 tristate "CPUfreq driver for ARM Integrator CPUs"
1172 depends on ARCH_INTEGRATOR && CPU_FREQ
1175 This enables the CPUfreq driver for ARM Integrator CPUs.
1177 For details, take a look at <file:Documentation/cpu-freq>.
1182 tristate "CPUfreq driver for i.MX CPUs"
1183 depends on ARCH_IMX && CPU_FREQ
1186 This enables the CPUfreq driver for i.MX CPUs.
1192 depends on CPU_FREQ && ARCH_PXA && PXA25x
1194 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1198 source "drivers/cpuidle/Kconfig"
1202 menu "Floating point emulation"
1204 comment "At least one emulation must be selected"
1207 bool "NWFPE math emulation"
1208 depends on !AEABI || OABI_COMPAT
1210 Say Y to include the NWFPE floating point emulator in the kernel.
1211 This is necessary to run most binaries. Linux does not currently
1212 support floating point hardware so you need to say Y here even if
1213 your machine has an FPA or floating point co-processor podule.
1215 You may say N here if you are going to load the Acorn FPEmulator
1216 early in the bootup.
1219 bool "Support extended precision"
1220 depends on FPE_NWFPE
1222 Say Y to include 80-bit support in the kernel floating-point
1223 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1224 Note that gcc does not generate 80-bit operations by default,
1225 so in most cases this option only enlarges the size of the
1226 floating point emulator without any good reason.
1228 You almost surely want to say N here.
1231 bool "FastFPE math emulation (EXPERIMENTAL)"
1232 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1234 Say Y here to include the FAST floating point emulator in the kernel.
1235 This is an experimental much faster emulator which now also has full
1236 precision for the mantissa. It does not support any exceptions.
1237 It is very simple, and approximately 3-6 times faster than NWFPE.
1239 It should be sufficient for most programs. It may be not suitable
1240 for scientific calculations, but you have to check this for yourself.
1241 If you do not feel you need a faster FP emulation you should better
1245 bool "VFP-format floating point maths"
1246 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1248 Say Y to include VFP support code in the kernel. This is needed
1249 if your hardware includes a VFP unit.
1251 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1252 release notes and additional status information.
1254 Say N if your target does not have VFP hardware.
1262 bool "Advanced SIMD (NEON) Extension support"
1263 depends on VFPv3 && CPU_V7
1265 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1270 menu "Userspace binary formats"
1272 source "fs/Kconfig.binfmt"
1275 tristate "RISC OS personality"
1278 Say Y here to include the kernel code necessary if you want to run
1279 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1280 experimental; if this sounds frightening, say N and sleep in peace.
1281 You can also say M here to compile this support as a module (which
1282 will be called arthur).
1286 menu "Power management options"
1288 source "kernel/power/Kconfig"
1290 config ARCH_SUSPEND_POSSIBLE
1295 source "net/Kconfig"
1297 menu "Device Drivers"
1299 source "drivers/base/Kconfig"
1301 source "drivers/connector/Kconfig"
1303 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1304 source "drivers/mtd/Kconfig"
1307 source "drivers/parport/Kconfig"
1309 source "drivers/pnp/Kconfig"
1311 source "drivers/block/Kconfig"
1313 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1315 source "drivers/misc/Kconfig"
1317 source "drivers/ide/Kconfig"
1319 source "drivers/scsi/Kconfig"
1321 source "drivers/ata/Kconfig"
1323 source "drivers/md/Kconfig"
1325 source "drivers/message/fusion/Kconfig"
1327 source "drivers/ieee1394/Kconfig"
1329 source "drivers/message/i2o/Kconfig"
1331 source "drivers/net/Kconfig"
1333 source "drivers/isdn/Kconfig"
1335 # input before char - char/joystick depends on it. As does USB.
1337 source "drivers/input/Kconfig"
1339 source "drivers/char/Kconfig"
1341 source "drivers/i2c/Kconfig"
1343 source "drivers/spi/Kconfig"
1345 source "drivers/gpio/Kconfig"
1347 source "drivers/w1/Kconfig"
1349 source "drivers/power/Kconfig"
1351 source "drivers/hwmon/Kconfig"
1353 source "drivers/thermal/Kconfig"
1355 source "drivers/watchdog/Kconfig"
1357 source "drivers/ssb/Kconfig"
1359 #source "drivers/l3/Kconfig"
1361 source "drivers/mfd/Kconfig"
1363 source "drivers/media/Kconfig"
1365 source "drivers/video/Kconfig"
1367 source "sound/Kconfig"
1369 source "drivers/hid/Kconfig"
1371 source "drivers/usb/Kconfig"
1373 source "drivers/uwb/Kconfig"
1375 source "drivers/mmc/Kconfig"
1377 source "drivers/memstick/Kconfig"
1379 source "drivers/accessibility/Kconfig"
1381 source "drivers/leds/Kconfig"
1383 source "drivers/rtc/Kconfig"
1385 source "drivers/dma/Kconfig"
1387 source "drivers/dca/Kconfig"
1389 source "drivers/auxdisplay/Kconfig"
1391 source "drivers/regulator/Kconfig"
1393 source "drivers/uio/Kconfig"
1395 source "drivers/staging/Kconfig"
1401 source "arch/arm/Kconfig.debug"
1403 source "security/Kconfig"
1405 source "crypto/Kconfig"
1407 source "lib/Kconfig"