arch/arm/Kconfig - linux - Git at Google


            
            #

            
            # 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

            
            	  <http://www.arm.linux.org.uk/>.


            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

            
            	  <file:Documentation/mca.txt> (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


            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:


            	  <http://www.linkupsys.com/>


            	  If you have any questions or comments about the Linux kernel port

            
            	  to this board, send e-mail to <sjhill@cotw.com>.


            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.


            	  <http://www.digi.com/products/microprocessors/index.jsp>


            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 (<http://www.simtec.co.uk/products/EB110ITX/>), 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" (<http://www.shark-linux.de/shark.html>).


            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).

            
            	  <http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>


            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 <file:Documentation/i386/IO-APIC.txt>,

            
            	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at

            
            	  <http://www.linuxdoc.org/docs.html#howto>.


            	  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 <file:Documentation/vm/numa> 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 <file:Documentation/cpu-freq>.


            	  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 <file:Documentation/arm/VFP/release-notes.txt> 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"