# # For a description of the syntax of this configuration file, # see Documentation/kbuild/kconfig-language.txt. # mainmenu "Linux Kernel Configuration" config ARM bool default y select HAVE_IDE select RTC_LIB select SYS_SUPPORTS_APM_EMULATION select HAVE_OPROFILE select HAVE_KPROBES if (!XIP_KERNEL) select HAVE_KRETPROBES if (HAVE_KPROBES) help The ARM series is a line of low-power-consumption RISC chip designs licensed by ARM Ltd and targeted at embedded applications and handhelds such as the Compaq IPAQ. ARM-based PCs are no longer manufactured, but legacy ARM-based PC hardware remains popular in Europe. There is an ARM Linux project with a web page at . config SYS_SUPPORTS_APM_EMULATION bool config GENERIC_GPIO bool default n config GENERIC_TIME bool default n config GENERIC_CLOCKEVENTS bool default n config GENERIC_CLOCKEVENTS_BROADCAST bool depends on GENERIC_CLOCKEVENTS default y if SMP && !LOCAL_TIMERS config MMU bool default y config NO_IOPORT bool default n config EISA bool ---help--- The Extended Industry Standard Architecture (EISA) bus was developed as an open alternative to the IBM MicroChannel bus. The EISA bus provided some of the features of the IBM MicroChannel bus while maintaining backward compatibility with cards made for the older ISA bus. The EISA bus saw limited use between 1988 and 1995 when it was made obsolete by the PCI bus. Say Y here if you are building a kernel for an EISA-based machine. Otherwise, say N. config SBUS bool config MCA bool help MicroChannel Architecture is found in some IBM PS/2 machines and laptops. It is a bus system similar to PCI or ISA. See (and especially the web page given there) before attempting to build an MCA bus kernel. config GENERIC_HARDIRQS bool default y config STACKTRACE_SUPPORT bool default y config LOCKDEP_SUPPORT bool default y config TRACE_IRQFLAGS_SUPPORT bool default y config HARDIRQS_SW_RESEND bool default y config GENERIC_IRQ_PROBE bool default y config GENERIC_LOCKBREAK bool default y depends on SMP && PREEMPT config RWSEM_GENERIC_SPINLOCK bool default y config RWSEM_XCHGADD_ALGORITHM bool config ARCH_HAS_ILOG2_U32 bool default n config ARCH_HAS_ILOG2_U64 bool default n config GENERIC_HWEIGHT bool default y config GENERIC_CALIBRATE_DELAY bool default y config ARCH_SUPPORTS_AOUT def_bool y config ARCH_MAY_HAVE_PC_FDC bool config ZONE_DMA bool default y config GENERIC_ISA_DMA bool config FIQ bool config ARCH_MTD_XIP bool config GENERIC_HARDIRQS_NO__DO_IRQ bool def_bool y if OPROFILE config OPROFILE_ARMV6 def_bool y depends on CPU_V6 && !SMP select OPROFILE_ARM11_CORE config OPROFILE_MPCORE def_bool y depends on CPU_V6 && SMP select OPROFILE_ARM11_CORE config OPROFILE_ARM11_CORE bool endif config VECTORS_BASE hex default 0xffff0000 if MMU || CPU_HIGH_VECTOR default DRAM_BASE if REMAP_VECTORS_TO_RAM default 0x00000000 help The base address of exception vectors. source "init/Kconfig" menu "System Type" choice prompt "ARM system type" default ARCH_VERSATILE config ARCH_AAEC2000 bool "Agilent AAEC-2000 based" select ARM_AMBA help This enables support for systems based on the Agilent AAEC-2000 config ARCH_INTEGRATOR bool "ARM Ltd. Integrator family" select ARM_AMBA select ICST525 help Support for ARM's Integrator platform. config ARCH_REALVIEW bool "ARM Ltd. RealView family" select ARM_AMBA select ICST307 select GENERIC_TIME select GENERIC_CLOCKEVENTS help This enables support for ARM Ltd RealView boards. config ARCH_VERSATILE bool "ARM Ltd. Versatile family" select ARM_AMBA select ARM_VIC select ICST307 select GENERIC_TIME select GENERIC_CLOCKEVENTS help This enables support for ARM Ltd Versatile board. config ARCH_AT91 bool "Atmel AT91" select GENERIC_GPIO help This enables support for systems based on the Atmel AT91RM9200, AT91SAM9 and AT91CAP9 processors. config ARCH_CLPS7500 bool "Cirrus CL-PS7500FE" select TIMER_ACORN select ISA select NO_IOPORT help Support for the Cirrus Logic PS7500FE system-on-a-chip. config ARCH_CLPS711X bool "Cirrus Logic CLPS711x/EP721x-based" help Support for Cirrus Logic 711x/721x based boards. config ARCH_CO285 bool "Co-EBSA285" select FOOTBRIDGE select FOOTBRIDGE_ADDIN help Support for Intel's EBSA285 companion chip. config ARCH_EBSA110 bool "EBSA-110" select ISA select NO_IOPORT help This is an evaluation board for the StrongARM processor available from Digital. It has limited hardware on-board, including an Ethernet interface, two PCMCIA sockets, two serial ports and a parallel port. config ARCH_EP93XX bool "EP93xx-based" select ARM_AMBA select ARM_VIC select GENERIC_GPIO select HAVE_GPIO_LIB help This enables support for the Cirrus EP93xx series of CPUs. config ARCH_FOOTBRIDGE bool "FootBridge" select FOOTBRIDGE help Support for systems based on the DC21285 companion chip ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. config ARCH_NETX bool "Hilscher NetX based" select ARM_VIC help This enables support for systems based on the Hilscher NetX Soc config ARCH_H720X bool "Hynix HMS720x-based" select ISA_DMA_API help This enables support for systems based on the Hynix HMS720x config ARCH_IMX bool "IMX" select GENERIC_GPIO select GENERIC_TIME select GENERIC_CLOCKEVENTS help Support for Motorola's i.MX family of processors (MX1, MXL). config ARCH_IOP13XX bool "IOP13xx-based" depends on MMU select PLAT_IOP select PCI select ARCH_SUPPORTS_MSI help Support for Intel's IOP13XX (XScale) family of processors. config ARCH_IOP32X bool "IOP32x-based" depends on MMU select PLAT_IOP select PCI help Support for Intel's 80219 and IOP32X (XScale) family of processors. config ARCH_IOP33X bool "IOP33x-based" depends on MMU select PLAT_IOP select PCI help Support for Intel's IOP33X (XScale) family of processors. config ARCH_IXP23XX bool "IXP23XX-based" depends on MMU select PCI help Support for Intel's IXP23xx (XScale) family of processors. config ARCH_IXP2000 bool "IXP2400/2800-based" depends on MMU select PCI help Support for Intel's IXP2400/2800 (XScale) family of processors. config ARCH_IXP4XX bool "IXP4xx-based" depends on MMU select GENERIC_GPIO select GENERIC_TIME select GENERIC_CLOCKEVENTS help Support for Intel's IXP4XX (XScale) family of processors. config ARCH_L7200 bool "LinkUp-L7200" select FIQ help Say Y here if you intend to run this kernel on a LinkUp Systems L7200 Software Development Board which uses an ARM720T processor. Information on this board can be obtained at: If you have any questions or comments about the Linux kernel port to this board, send e-mail to . config ARCH_KS8695 bool "Micrel/Kendin KS8695" select GENERIC_GPIO help Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based System-on-Chip devices. config ARCH_NS9XXX bool "NetSilicon NS9xxx" select GENERIC_GPIO select GENERIC_TIME select GENERIC_CLOCKEVENTS help Say Y here if you intend to run this kernel on a NetSilicon NS9xxx System. config ARCH_MXC bool "Freescale MXC/iMX-based" select ARCH_MTD_XIP help Support for Freescale MXC/iMX-based family of processors config ARCH_ORION5X bool "Marvell Orion" depends on MMU select PCI select GENERIC_GPIO select GENERIC_TIME select GENERIC_CLOCKEVENTS select PLAT_ORION help Support for the following Marvell Orion 5x series SoCs: Orion-1 (5181), Orion-NAS (5182), Orion-2 (5281.) config ARCH_PNX4008 bool "Philips Nexperia PNX4008 Mobile" help This enables support for Philips PNX4008 mobile platform. config ARCH_PXA bool "PXA2xx/PXA3xx-based" depends on MMU select ARCH_MTD_XIP select GENERIC_GPIO select HAVE_GPIO_LIB select GENERIC_TIME select GENERIC_CLOCKEVENTS select TICK_ONESHOT help Support for Intel/Marvell's PXA2xx/PXA3xx processor line. config ARCH_RPC bool "RiscPC" select ARCH_ACORN select FIQ select TIMER_ACORN select ARCH_MAY_HAVE_PC_FDC select ISA_DMA_API select NO_IOPORT help On the Acorn Risc-PC, Linux can support the internal IDE disk and CD-ROM interface, serial and parallel port, and the floppy drive. config ARCH_SA1100 bool "SA1100-based" select ISA select ARCH_DISCONTIGMEM_ENABLE select ARCH_SPARSEMEM_ENABLE select ARCH_SELECT_MEMORY_MODEL select ARCH_MTD_XIP select GENERIC_GPIO select GENERIC_TIME select GENERIC_CLOCKEVENTS select TICK_ONESHOT select HAVE_GPIO_LIB help Support for StrongARM 11x0 based boards. config ARCH_S3C2410 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443" select GENERIC_GPIO help Samsung S3C2410X CPU based systems, such as the Simtec Electronics BAST (), the IPAQ 1940 or the Samsung SMDK2410 development board (and derivatives). config ARCH_SHARK bool "Shark" select ISA select ISA_DMA select PCI help Support for the StrongARM based Digital DNARD machine, also known as "Shark" (). config ARCH_LH7A40X bool "Sharp LH7A40X" help Say Y here for systems based on one of the Sharp LH7A40X System on a Chip processors. These CPUs include an ARM922T core with a wide array of integrated devices for hand-held and low-power applications. config ARCH_DAVINCI bool "TI DaVinci" select GENERIC_TIME select GENERIC_CLOCKEVENTS select GENERIC_GPIO help Support for TI's DaVinci platform. config ARCH_OMAP bool "TI OMAP" select GENERIC_GPIO select HAVE_GPIO_LIB select GENERIC_TIME select GENERIC_CLOCKEVENTS help Support for TI's OMAP platform (OMAP1 and OMAP2). config ARCH_MSM7X00A bool "Qualcomm MSM7X00A" select GENERIC_TIME select GENERIC_CLOCKEVENTS help Support for Qualcomm MSM7X00A based systems. This runs on the ARM11 apps processor of the MSM7X00A and depends on a shared memory interface to the ARM9 modem processor which runs the baseband stack and controls some vital subsystems (clock and power control, etc). endchoice source "arch/arm/mach-clps711x/Kconfig" source "arch/arm/mach-ep93xx/Kconfig" source "arch/arm/mach-footbridge/Kconfig" source "arch/arm/mach-integrator/Kconfig" source "arch/arm/mach-iop32x/Kconfig" source "arch/arm/mach-iop33x/Kconfig" source "arch/arm/mach-iop13xx/Kconfig" source "arch/arm/mach-ixp4xx/Kconfig" source "arch/arm/mach-ixp2000/Kconfig" source "arch/arm/mach-ixp23xx/Kconfig" source "arch/arm/mach-pxa/Kconfig" source "arch/arm/mach-sa1100/Kconfig" source "arch/arm/plat-omap/Kconfig" source "arch/arm/mach-omap1/Kconfig" source "arch/arm/mach-omap2/Kconfig" source "arch/arm/mach-orion5x/Kconfig" source "arch/arm/plat-s3c24xx/Kconfig" source "arch/arm/plat-s3c/Kconfig" if ARCH_S3C2410 source "arch/arm/mach-s3c2400/Kconfig" source "arch/arm/mach-s3c2410/Kconfig" source "arch/arm/mach-s3c2412/Kconfig" source "arch/arm/mach-s3c2440/Kconfig" source "arch/arm/mach-s3c2442/Kconfig" source "arch/arm/mach-s3c2443/Kconfig" endif source "arch/arm/mach-lh7a40x/Kconfig" source "arch/arm/mach-imx/Kconfig" source "arch/arm/mach-h720x/Kconfig" source "arch/arm/mach-versatile/Kconfig" source "arch/arm/mach-aaec2000/Kconfig" source "arch/arm/mach-realview/Kconfig" source "arch/arm/mach-at91/Kconfig" source "arch/arm/plat-mxc/Kconfig" source "arch/arm/mach-netx/Kconfig" source "arch/arm/mach-ns9xxx/Kconfig" source "arch/arm/mach-davinci/Kconfig" source "arch/arm/mach-ks8695/Kconfig" source "arch/arm/mach-msm/Kconfig" # Definitions to make life easier config ARCH_ACORN bool config PLAT_IOP bool config PLAT_ORION bool source arch/arm/mm/Kconfig config IWMMXT bool "Enable iWMMXt support" depends on CPU_XSCALE || CPU_XSC3 default y if PXA27x || PXA3xx help Enable support for iWMMXt context switching at run time if running on a CPU that supports it. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER config XSCALE_PMU bool depends on CPU_XSCALE && !XSCALE_PMU_TIMER default y if !MMU source "arch/arm/Kconfig-nommu" endif endmenu source "arch/arm/common/Kconfig" config FORCE_MAX_ZONEORDER int depends on SA1111 default "9" menu "Bus support" config ARM_AMBA bool config ISA bool help Find out whether you have ISA slots on your motherboard. ISA is the name of a bus system, i.e. the way the CPU talks to the other stuff inside your box. Other bus systems are PCI, EISA, MicroChannel (MCA) or VESA. ISA is an older system, now being displaced by PCI; newer boards don't support it. If you have ISA, say Y, otherwise N. # Select ISA DMA controller support config ISA_DMA bool select ISA_DMA_API # Select ISA DMA interface config ISA_DMA_API bool config PCI bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE help Find out whether you have a PCI motherboard. PCI is the name of a bus system, i.e. the way the CPU talks to the other stuff inside your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or VESA. If you have PCI, say Y, otherwise N. config PCI_SYSCALL def_bool PCI # Select the host bridge type config PCI_HOST_VIA82C505 bool depends on PCI && ARCH_SHARK default y config PCI_HOST_ITE8152 bool depends on PCI && MACH_ARMCORE default y select DMABOUNCE source "drivers/pci/Kconfig" source "drivers/pcmcia/Kconfig" endmenu menu "Kernel Features" source "kernel/time/Kconfig" config SMP bool "Symmetric Multi-Processing (EXPERIMENTAL)" depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP) help This enables support for systems with more than one CPU. If you have a system with only one CPU, like most personal computers, say N. If you have a system with more than one CPU, say Y. If you say N here, the kernel will run on single and multiprocessor machines, but will use only one CPU of a multiprocessor machine. If you say Y here, the kernel will run on many, but not all, single processor machines. On a single processor machine, the kernel will run faster if you say N here. See also , and the SMP-HOWTO available at . If you don't know what to do here, say N. config NR_CPUS int "Maximum number of CPUs (2-32)" range 2 32 depends on SMP default "4" config HOTPLUG_CPU bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" depends on SMP && HOTPLUG && EXPERIMENTAL help Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu. config LOCAL_TIMERS bool "Use local timer interrupts" depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP) default y help Enable support for local timers on SMP platforms, rather then the legacy IPI broadcast method. Local timers allows the system accounting to be spread across the timer interval, preventing a "thundering herd" at every timer tick. config PREEMPT bool "Preemptible Kernel (EXPERIMENTAL)" depends on EXPERIMENTAL help This option reduces the latency of the kernel when reacting to real-time or interactive events by allowing a low priority process to be preempted even if it is in kernel mode executing a system call. This allows applications to run more reliably even when the system is under load. Say Y here if you are building a kernel for a desktop, embedded or real-time system. Say N if you are unsure. config NO_IDLE_HZ bool "Dynamic tick timer" depends on !GENERIC_CLOCKEVENTS help Select this option if you want to disable continuous timer ticks and have them programmed to occur as required. This option saves power as the system can remain in idle state for longer. By default dynamic tick is disabled during the boot, and can be manually enabled with: echo 1 > /sys/devices/system/timer/timer0/dyn_tick Alternatively, if you want dynamic tick automatically enabled during boot, pass "dyntick=enable" via the kernel command string. Please note that dynamic tick may affect the accuracy of timekeeping on some platforms depending on the implementation. Currently at least OMAP, PXA2xx and SA11x0 platforms are known to have accurate timekeeping with dynamic tick. config HZ int default 128 if ARCH_L7200 default 200 if ARCH_EBSA110 || ARCH_S3C2410 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER default AT91_TIMER_HZ if ARCH_AT91 default 100 config AEABI bool "Use the ARM EABI to compile the kernel" help This option allows for the kernel to be compiled using the latest ARM ABI (aka EABI). This is only useful if you are using a user space environment that is also compiled with EABI. Since there are major incompatibilities between the legacy ABI and EABI, especially with regard to structure member alignment, this option also changes the kernel syscall calling convention to disambiguate both ABIs and allow for backward compatibility support (selected with CONFIG_OABI_COMPAT). To use this you need GCC version 4.0.0 or later. config OABI_COMPAT bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" depends on AEABI && EXPERIMENTAL default y help This option preserves the old syscall interface along with the new (ARM EABI) one. It also provides a compatibility layer to intercept syscalls that have structure arguments which layout in memory differs between the legacy ABI and the new ARM EABI (only for non "thumb" binaries). This option adds a tiny overhead to all syscalls and produces a slightly larger kernel. If you know you'll be using only pure EABI user space then you can say N here. If this option is not selected and you attempt to execute a legacy ABI binary then the result will be UNPREDICTABLE (in fact it can be predicted that it won't work at all). If in doubt say Y. config ARCH_DISCONTIGMEM_ENABLE bool default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM) help Say Y to support efficient handling of discontiguous physical memory, for architectures which are either NUMA (Non-Uniform Memory Access) or have huge holes in the physical address space for other reasons. See for more. config ARCH_SPARSEMEM_ENABLE bool config ARCH_SELECT_MEMORY_MODEL bool config NODES_SHIFT int default "4" if ARCH_LH7A40X default "2" depends on NEED_MULTIPLE_NODES source "mm/Kconfig" config LEDS bool "Timer and CPU usage LEDs" depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \ ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \ ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \ ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \ ARCH_KS8695 || MACH_RD88F5182 help If you say Y here, the LEDs on your machine will be used to provide useful information about your current system status. If you are compiling a kernel for a NetWinder or EBSA-285, you will be able to select which LEDs are active using the options below. If you are compiling a kernel for the EBSA-110 or the LART however, the red LED will simply flash regularly to indicate that the system is still functional. It is safe to say Y here if you have a CATS system, but the driver will do nothing. config LEDS_TIMER bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ OMAP_OSK_MISTRAL || MACH_OMAP_H2 \ || MACH_OMAP_PERSEUS2 depends on LEDS depends on !GENERIC_CLOCKEVENTS default y if ARCH_EBSA110 help If you say Y here, one of the system LEDs (the green one on the NetWinder, the amber one on the EBSA285, or the red one on the LART) will flash regularly to indicate that the system is still operational. This is mainly useful to kernel hackers who are debugging unstable kernels. The LART uses the same LED for both Timer LED and CPU usage LED functions. You may choose to use both, but the Timer LED function will overrule the CPU usage LED. config LEDS_CPU bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ !ARCH_OMAP) \ || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \ || MACH_OMAP_PERSEUS2 depends on LEDS help If you say Y here, the red LED will be used to give a good real time indication of CPU usage, by lighting whenever the idle task is not currently executing. The LART uses the same LED for both Timer LED and CPU usage LED functions. You may choose to use both, but the Timer LED function will overrule the CPU usage LED. config ALIGNMENT_TRAP bool depends on CPU_CP15_MMU default y if !ARCH_EBSA110 help ARM processors cannot fetch/store information which is not naturally aligned on the bus, i.e., a 4 byte fetch must start at an address divisible by 4. On 32-bit ARM processors, these non-aligned fetch/store instructions will be emulated in software if you say here, which has a severe performance impact. This is necessary for correct operation of some network protocols. With an IP-only configuration it is safe to say N, otherwise say Y. endmenu menu "Boot options" # Compressed boot loader in ROM. Yes, we really want to ask about # TEXT and BSS so we preserve their values in the config files. config ZBOOT_ROM_TEXT hex "Compressed ROM boot loader base address" default "0" help The physical address at which the ROM-able zImage is to be placed in the target. Platforms which normally make use of ROM-able zImage formats normally set this to a suitable value in their defconfig file. If ZBOOT_ROM is not enabled, this has no effect. config ZBOOT_ROM_BSS hex "Compressed ROM boot loader BSS address" default "0" help The base address of an area of read/write memory in the target for the ROM-able zImage which must be available while the decompressor is running. It must be large enough to hold the entire decompressed kernel plus an additional 128 KiB. Platforms which normally make use of ROM-able zImage formats normally set this to a suitable value in their defconfig file. If ZBOOT_ROM is not enabled, this has no effect. config ZBOOT_ROM bool "Compressed boot loader in ROM/flash" depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS help Say Y here if you intend to execute your compressed kernel image (zImage) directly from ROM or flash. If unsure, say N. config CMDLINE string "Default kernel command string" default "" help On some architectures (EBSA110 and CATS), there is currently no way for the boot loader to pass arguments to the kernel. For these architectures, you should supply some command-line options at build time by entering them here. As a minimum, you should specify the memory size and the root device (e.g., mem=64M root=/dev/nfs). config XIP_KERNEL bool "Kernel Execute-In-Place from ROM" depends on !ZBOOT_ROM help Execute-In-Place allows the kernel to run from non-volatile storage directly addressable by the CPU, such as NOR flash. This saves RAM space since the text section of the kernel is not loaded from flash to RAM. Read-write sections, such as the data section and stack, are still copied to RAM. The XIP kernel is not compressed since it has to run directly from flash, so it will take more space to store it. The flash address used to link the kernel object files, and for storing it, is configuration dependent. Therefore, if you say Y here, you must know the proper physical address where to store the kernel image depending on your own flash memory usage. Also note that the make target becomes "make xipImage" rather than "make zImage" or "make Image". The final kernel binary to put in ROM memory will be arch/arm/boot/xipImage. If unsure, say N. config XIP_PHYS_ADDR hex "XIP Kernel Physical Location" depends on XIP_KERNEL default "0x00080000" help This is the physical address in your flash memory the kernel will be linked for and stored to. This address is dependent on your own flash usage. config KEXEC bool "Kexec system call (EXPERIMENTAL)" depends on EXPERIMENTAL help kexec is a system call that implements the ability to shutdown your current kernel, and to start another kernel. It is like a reboot but it is independent of the system firmware. And like a reboot you can start any kernel with it, not just Linux. It is an ongoing process to be certain the hardware in a machine is properly shutdown, so do not be surprised if this code does not initially work for you. It may help to enable device hotplugging support. config ATAGS_PROC bool "Export atags in procfs" depends on KEXEC default y help Should the atags used to boot the kernel be exported in an "atags" file in procfs. Useful with kexec. endmenu if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA) menu "CPU Frequency scaling" source "drivers/cpufreq/Kconfig" config CPU_FREQ_SA1100 bool depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT) default y config CPU_FREQ_SA1110 bool depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3) default y config CPU_FREQ_INTEGRATOR tristate "CPUfreq driver for ARM Integrator CPUs" depends on ARCH_INTEGRATOR && CPU_FREQ default y help This enables the CPUfreq driver for ARM Integrator CPUs. For details, take a look at . If in doubt, say Y. config CPU_FREQ_IMX tristate "CPUfreq driver for i.MX CPUs" depends on ARCH_IMX && CPU_FREQ default n help This enables the CPUfreq driver for i.MX CPUs. If in doubt, say N. config CPU_FREQ_PXA bool depends on CPU_FREQ && ARCH_PXA && PXA25x default y select CPU_FREQ_DEFAULT_GOV_USERSPACE endmenu endif menu "Floating point emulation" comment "At least one emulation must be selected" config FPE_NWFPE bool "NWFPE math emulation" depends on !AEABI || OABI_COMPAT ---help--- Say Y to include the NWFPE floating point emulator in the kernel. This is necessary to run most binaries. Linux does not currently support floating point hardware so you need to say Y here even if your machine has an FPA or floating point co-processor podule. You may say N here if you are going to load the Acorn FPEmulator early in the bootup. config FPE_NWFPE_XP bool "Support extended precision" depends on FPE_NWFPE help Say Y to include 80-bit support in the kernel floating-point emulator. Otherwise, only 32 and 64-bit support is compiled in. Note that gcc does not generate 80-bit operations by default, so in most cases this option only enlarges the size of the floating point emulator without any good reason. You almost surely want to say N here. config FPE_FASTFPE bool "FastFPE math emulation (EXPERIMENTAL)" depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL ---help--- Say Y here to include the FAST floating point emulator in the kernel. This is an experimental much faster emulator which now also has full precision for the mantissa. It does not support any exceptions. It is very simple, and approximately 3-6 times faster than NWFPE. It should be sufficient for most programs. It may be not suitable for scientific calculations, but you have to check this for yourself. If you do not feel you need a faster FP emulation you should better choose NWFPE. config VFP bool "VFP-format floating point maths" depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON help Say Y to include VFP support code in the kernel. This is needed if your hardware includes a VFP unit. Please see for release notes and additional status information. Say N if your target does not have VFP hardware. config VFPv3 bool depends on VFP default y if CPU_V7 config NEON bool "Advanced SIMD (NEON) Extension support" depends on VFPv3 && CPU_V7 help Say Y to include support code for NEON, the ARMv7 Advanced SIMD Extension. endmenu menu "Userspace binary formats" source "fs/Kconfig.binfmt" config ARTHUR tristate "RISC OS personality" depends on !AEABI help Say Y here to include the kernel code necessary if you want to run Acorn RISC OS/Arthur binaries under Linux. This code is still very experimental; if this sounds frightening, say N and sleep in peace. You can also say M here to compile this support as a module (which will be called arthur). endmenu menu "Power management options" source "kernel/power/Kconfig" config ARCH_SUSPEND_POSSIBLE def_bool y endmenu source "net/Kconfig" menu "Device Drivers" source "drivers/base/Kconfig" source "drivers/connector/Kconfig" if ALIGNMENT_TRAP || !CPU_CP15_MMU source "drivers/mtd/Kconfig" endif source "drivers/parport/Kconfig" source "drivers/pnp/Kconfig" source "drivers/block/Kconfig" # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4 source "drivers/misc/Kconfig" source "drivers/ide/Kconfig" source "drivers/scsi/Kconfig" source "drivers/ata/Kconfig" source "drivers/md/Kconfig" source "drivers/message/fusion/Kconfig" source "drivers/ieee1394/Kconfig" source "drivers/message/i2o/Kconfig" source "drivers/net/Kconfig" source "drivers/isdn/Kconfig" # input before char - char/joystick depends on it. As does USB. source "drivers/input/Kconfig" source "drivers/char/Kconfig" source "drivers/i2c/Kconfig" source "drivers/spi/Kconfig" source "drivers/gpio/Kconfig" source "drivers/w1/Kconfig" source "drivers/power/Kconfig" source "drivers/hwmon/Kconfig" source "drivers/watchdog/Kconfig" source "drivers/ssb/Kconfig" #source "drivers/l3/Kconfig" source "drivers/mfd/Kconfig" source "drivers/media/Kconfig" source "drivers/video/Kconfig" source "sound/Kconfig" source "drivers/hid/Kconfig" source "drivers/usb/Kconfig" source "drivers/mmc/Kconfig" source "drivers/leds/Kconfig" source "drivers/rtc/Kconfig" source "drivers/dma/Kconfig" source "drivers/dca/Kconfig" source "drivers/uio/Kconfig" endmenu source "fs/Kconfig" source "arch/arm/Kconfig.debug" source "security/Kconfig" source "crypto/Kconfig" source "lib/Kconfig"