Kconfig 35.8 KB
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#
# 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
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	select HAVE_AOUT
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	select HAVE_IDE
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	select RTC_LIB
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	select SYS_SUPPORTS_APM_EMULATION
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	select HAVE_OPROFILE
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	select HAVE_ARCH_KGDB
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	select HAVE_KPROBES if (!XIP_KERNEL)
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	select HAVE_KRETPROBES if (HAVE_KPROBES)
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	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
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	select HAVE_GENERIC_DMA_COHERENT
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	help
	  The ARM series is a line of low-power-consumption RISC chip designs
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	  licensed by ARM Ltd and targeted at embedded applications and
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	  handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
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	  manufactured, but legacy ARM-based PC hardware remains popular in
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	  Europe.  There is an ARM Linux project with a web page at
	  <http://www.arm.linux.org.uk/>.

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config HAVE_PWM
	bool

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config SYS_SUPPORTS_APM_EMULATION
	bool

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config GENERIC_GPIO
	bool
	default n

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config GENERIC_TIME
	bool
	default n

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config GENERIC_CLOCKEVENTS
	bool
	default n

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config GENERIC_CLOCKEVENTS_BROADCAST
	bool
	depends on GENERIC_CLOCKEVENTS
	default y if SMP && !LOCAL_TIMERS

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config MMU
	bool
	default y

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config NO_IOPORT
	bool
	default n

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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.

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config GENERIC_HARDIRQS
	bool
	default y

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config STACKTRACE_SUPPORT
	bool
	default y

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config HAVE_LATENCYTOP_SUPPORT
	bool
	depends on !SMP
	default y

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config LOCKDEP_SUPPORT
	bool
	default y

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config TRACE_IRQFLAGS_SUPPORT
	bool
	default y

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config HARDIRQS_SW_RESEND
	bool
	default y

config GENERIC_IRQ_PROBE
	bool
	default y

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config GENERIC_LOCKBREAK
	bool
	default y
	depends on SMP && PREEMPT

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config RWSEM_GENERIC_SPINLOCK
	bool
	default y

config RWSEM_XCHGADD_ALGORITHM
	bool

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config ARCH_HAS_ILOG2_U32
	bool
	default n

config ARCH_HAS_ILOG2_U64
	bool
	default n

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config GENERIC_HWEIGHT
	bool
	default y

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config GENERIC_CALIBRATE_DELAY
	bool
	default y

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config ARCH_MAY_HAVE_PC_FDC
	bool

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config ZONE_DMA
	bool

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config GENERIC_ISA_DMA
	bool

config FIQ
	bool

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config ARCH_MTD_XIP
	bool

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config GENERIC_HARDIRQS_NO__DO_IRQ
	def_bool y

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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

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config OPROFILE_ARMV7
	def_bool y
	depends on CPU_V7 && !SMP
	bool

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endif

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config VECTORS_BASE
	hex
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	default 0xffff0000 if MMU || CPU_HIGH_VECTOR
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	default DRAM_BASE if REMAP_VECTORS_TO_RAM
	default 0x00000000
	help
	  The base address of exception vectors.

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source "init/Kconfig"

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source "kernel/Kconfig.freezer"

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menu "System Type"

choice
	prompt "ARM system type"
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	default ARCH_VERSATILE
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config ARCH_AAEC2000
	bool "Agilent AAEC-2000 based"
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	select CPU_ARM920T
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	select ARM_AMBA
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	select HAVE_CLK
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	help
	  This enables support for systems based on the Agilent AAEC-2000

config ARCH_INTEGRATOR
	bool "ARM Ltd. Integrator family"
	select ARM_AMBA
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	select HAVE_CLK
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	select COMMON_CLKDEV
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	select ICST525
	help
	  Support for ARM's Integrator platform.

config ARCH_REALVIEW
	bool "ARM Ltd. RealView family"
	select ARM_AMBA
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	select HAVE_CLK
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	select COMMON_CLKDEV
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	select ICST307
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	select GENERIC_TIME
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	select GENERIC_CLOCKEVENTS
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	help
	  This enables support for ARM Ltd RealView boards.

config ARCH_VERSATILE
	bool "ARM Ltd. Versatile family"
	select ARM_AMBA
	select ARM_VIC
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	select HAVE_CLK
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	select COMMON_CLKDEV
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	select ICST307
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	select GENERIC_TIME
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	select GENERIC_CLOCKEVENTS
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	help
	  This enables support for ARM Ltd Versatile board.

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config ARCH_AT91
	bool "Atmel AT91"
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	select GENERIC_GPIO
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	select ARCH_REQUIRE_GPIOLIB
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	select HAVE_CLK
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	help
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	  This enables support for systems based on the Atmel AT91RM9200,
	  AT91SAM9 and AT91CAP9 processors.
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config ARCH_CLPS711X
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	bool "Cirrus Logic CLPS711x/EP721x-based"
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	select CPU_ARM720T
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	help
	  Support for Cirrus Logic 711x/721x based boards.
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config ARCH_EBSA110
	bool "EBSA-110"
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	select CPU_SA110
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	select ISA
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	select NO_IOPORT
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	help
	  This is an evaluation board for the StrongARM processor available
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	  from Digital. It has limited hardware on-board, including an
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	  Ethernet interface, two PCMCIA sockets, two serial ports and a
	  parallel port.

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config ARCH_EP93XX
	bool "EP93xx-based"
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	select CPU_ARM920T
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	select ARM_AMBA
	select ARM_VIC
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	select GENERIC_GPIO
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	select HAVE_CLK
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	select COMMON_CLKDEV
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	select ARCH_REQUIRE_GPIOLIB
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	help
	  This enables support for the Cirrus EP93xx series of CPUs.

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config ARCH_GEMINI
	bool "Cortina Systems Gemini"
	select CPU_FA526
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	select GENERIC_GPIO
	select ARCH_REQUIRE_GPIOLIB
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	help
	  Support for the Cortina Systems Gemini family SoCs

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config ARCH_FOOTBRIDGE
	bool "FootBridge"
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	select CPU_SA110
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	select FOOTBRIDGE
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	help
	  Support for systems based on the DC21285 companion chip
	  ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
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config ARCH_NETX
	bool "Hilscher NetX based"
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	select CPU_ARM926T
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	select ARM_VIC
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	select GENERIC_CLOCKEVENTS
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	select GENERIC_TIME
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	help
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	  This enables support for systems based on the Hilscher NetX Soc

config ARCH_H720X
	bool "Hynix HMS720x-based"
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	select CPU_ARM720T
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	select ISA_DMA_API
	help
	  This enables support for systems based on the Hynix HMS720x

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config ARCH_IOP13XX
	bool "IOP13xx-based"
	depends on MMU
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	select CPU_XSC3
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	select PLAT_IOP
	select PCI
	select ARCH_SUPPORTS_MSI
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	select VMSPLIT_1G
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	help
	  Support for Intel's IOP13XX (XScale) family of processors.

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config ARCH_IOP32X
	bool "IOP32x-based"
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	depends on MMU
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	select CPU_XSCALE
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	select PLAT_IOP
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	select PCI
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	select GENERIC_GPIO
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	select ARCH_REQUIRE_GPIOLIB
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	help
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	  Support for Intel's 80219 and IOP32X (XScale) family of
	  processors.

config ARCH_IOP33X
	bool "IOP33x-based"
	depends on MMU
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	select CPU_XSCALE
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	select PLAT_IOP
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	select PCI
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	select GENERIC_GPIO
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	select ARCH_REQUIRE_GPIOLIB
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	help
	  Support for Intel's IOP33X (XScale) family of processors.
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config ARCH_IXP23XX
 	bool "IXP23XX-based"
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	depends on MMU
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	select CPU_XSC3
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 	select PCI
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	help
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	  Support for Intel's IXP23xx (XScale) family of processors.
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config ARCH_IXP2000
	bool "IXP2400/2800-based"
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	depends on MMU
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	select CPU_XSCALE
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	select PCI
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	help
	  Support for Intel's IXP2400/2800 (XScale) family of processors.
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config ARCH_IXP4XX
	bool "IXP4xx-based"
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	depends on MMU
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	select CPU_XSCALE
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	select GENERIC_GPIO
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	select GENERIC_TIME
	select GENERIC_CLOCKEVENTS
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	select DMABOUNCE if PCI
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	help
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	  Support for Intel's IXP4XX (XScale) family of processors.
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config ARCH_L7200
	bool "LinkUp-L7200"
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	select CPU_ARM720T
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	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>.

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config ARCH_KIRKWOOD
	bool "Marvell Kirkwood"
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	select CPU_FEROCEON
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	select PCI
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	select GENERIC_GPIO
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	select GENERIC_TIME
	select GENERIC_CLOCKEVENTS
	select PLAT_ORION
	help
	  Support for the following Marvell Kirkwood series SoCs:
	  88F6180, 88F6192 and 88F6281.

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config ARCH_KS8695
	bool "Micrel/Kendin KS8695"
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	select CPU_ARM922T
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	select GENERIC_GPIO
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        select ARCH_REQUIRE_GPIOLIB
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	help
	  Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
	  System-on-Chip devices.

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config ARCH_NS9XXX
	bool "NetSilicon NS9xxx"
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	select CPU_ARM926T
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	select GENERIC_GPIO
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	select GENERIC_TIME
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	select GENERIC_CLOCKEVENTS
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	select HAVE_CLK
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	help
	  Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
	  System.

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

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config ARCH_LOKI
	bool "Marvell Loki (88RC8480)"
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	select CPU_FEROCEON
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	select GENERIC_TIME
	select GENERIC_CLOCKEVENTS
	select PLAT_ORION
	help
	  Support for the Marvell Loki (88RC8480) SoC.

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config ARCH_MV78XX0
	bool "Marvell MV78xx0"
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	select CPU_FEROCEON
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	select PCI
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	select GENERIC_GPIO
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	select GENERIC_TIME
	select GENERIC_CLOCKEVENTS
	select PLAT_ORION
	help
	  Support for the following Marvell MV78xx0 series SoCs:
	  MV781x0, MV782x0.

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config ARCH_MXC
	bool "Freescale MXC/iMX-based"
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	select GENERIC_TIME
	select GENERIC_CLOCKEVENTS
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	select ARCH_MTD_XIP
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	select GENERIC_GPIO
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	select ARCH_REQUIRE_GPIOLIB
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	select HAVE_CLK
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	help
	  Support for Freescale MXC/iMX-based family of processors

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config ARCH_ORION5X
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	bool "Marvell Orion"
	depends on MMU
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	select CPU_FEROCEON
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	select PCI
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	select GENERIC_GPIO
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	select GENERIC_TIME
	select GENERIC_CLOCKEVENTS
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	select PLAT_ORION
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	help
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	  Support for the following Marvell Orion 5x series SoCs:
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	  Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
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	  Orion-2 (5281), Orion-1-90 (6183).
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config ARCH_PNX4008
	bool "Philips Nexperia PNX4008 Mobile"
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	select CPU_ARM926T
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	select HAVE_CLK
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	help
	  This enables support for Philips PNX4008 mobile platform.

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config ARCH_PXA
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	bool "PXA2xx/PXA3xx-based"
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	depends on MMU
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	select ARCH_MTD_XIP
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	select GENERIC_GPIO
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	select HAVE_CLK
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	select COMMON_CLKDEV
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	select ARCH_REQUIRE_GPIOLIB
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	select GENERIC_TIME
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	select GENERIC_CLOCKEVENTS
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	select TICK_ONESHOT
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	select PLAT_PXA
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	help
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	  Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
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config ARCH_MMP
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	bool "Marvell PXA168/910"
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	depends on MMU
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	select GENERIC_GPIO
	select ARCH_REQUIRE_GPIOLIB
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	select HAVE_CLK
	select COMMON_CLKDEV
	select GENERIC_TIME
	select GENERIC_CLOCKEVENTS
	select TICK_ONESHOT
	select PLAT_PXA
	help
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	  Support for Marvell's PXA168/910 processor line.
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config ARCH_RPC
	bool "RiscPC"
	select ARCH_ACORN
	select FIQ
	select TIMER_ACORN
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	select ARCH_MAY_HAVE_PC_FDC
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	select HAVE_PATA_PLATFORM
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	select ISA_DMA_API
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	select NO_IOPORT
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	select ARCH_SPARSEMEM_ENABLE
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	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"
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	select CPU_SA1100
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	select ISA
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	select ARCH_SPARSEMEM_ENABLE
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	select ARCH_MTD_XIP
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	select GENERIC_GPIO
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	select GENERIC_TIME
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	select GENERIC_CLOCKEVENTS
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	select HAVE_CLK
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	select TICK_ONESHOT
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	select ARCH_REQUIRE_GPIOLIB
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	help
	  Support for StrongARM 11x0 based boards.
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config ARCH_S3C2410
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	bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
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	select GENERIC_GPIO
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	select HAVE_CLK
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	help
	  Samsung S3C2410X CPU based systems, such as the Simtec Electronics
	  BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
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	  the Samsung SMDK2410 development board (and derivatives).
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config ARCH_S3C64XX
	bool "Samsung S3C64XX"
	select GENERIC_GPIO
	select HAVE_CLK
	help
	  Samsung S3C64XX series based systems

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config ARCH_SHARK
	bool "Shark"
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	select CPU_SA110
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	select ISA
	select ISA_DMA
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	select ZONE_DMA
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	select PCI
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	help
	  Support for the StrongARM based Digital DNARD machine, also known
	  as "Shark" (<http://www.shark-linux.de/shark.html>).
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config ARCH_LH7A40X
	bool "Sharp LH7A40X"
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	select CPU_ARM922T
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	select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
	select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
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	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.

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config ARCH_DAVINCI
	bool "TI DaVinci"
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	select CPU_ARM926T
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	select GENERIC_TIME
	select GENERIC_CLOCKEVENTS
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	select GENERIC_GPIO
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	select ARCH_REQUIRE_GPIOLIB
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	select HAVE_CLK
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	select ZONE_DMA
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	select HAVE_IDE
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	select COMMON_CLKDEV
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	help
	  Support for TI's DaVinci platform.

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config ARCH_OMAP
	bool "TI OMAP"
	select GENERIC_GPIO
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	select HAVE_CLK
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	select ARCH_REQUIRE_GPIOLIB
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	select GENERIC_TIME
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	select GENERIC_CLOCKEVENTS
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	help
	  Support for TI's OMAP platform (OMAP1 and OMAP2).

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config ARCH_MSM
	bool "Qualcomm MSM"
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	select CPU_V6
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	select GENERIC_TIME
	select GENERIC_CLOCKEVENTS
	help
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	  Support for Qualcomm MSM7K based systems.  This runs on the ARM11
	  apps processor of the MSM7K and depends on a shared memory
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	  interface to the ARM9 modem processor which runs the baseband stack
	  and controls some vital subsystems (clock and power control, etc).

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config ARCH_W90X900
	bool "Nuvoton W90X900 CPU"
	select CPU_ARM926T
	help
		Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
		can login www.mcuos.com or www.nuvoton.com to know more.

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endchoice

source "arch/arm/mach-clps711x/Kconfig"

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source "arch/arm/mach-ep93xx/Kconfig"

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source "arch/arm/mach-footbridge/Kconfig"

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source "arch/arm/mach-gemini/Kconfig"

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source "arch/arm/mach-integrator/Kconfig"

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source "arch/arm/mach-iop32x/Kconfig"

source "arch/arm/mach-iop33x/Kconfig"
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source "arch/arm/mach-iop13xx/Kconfig"

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source "arch/arm/mach-ixp4xx/Kconfig"

source "arch/arm/mach-ixp2000/Kconfig"

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source "arch/arm/mach-ixp23xx/Kconfig"

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source "arch/arm/mach-loki/Kconfig"

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source "arch/arm/mach-mv78xx0/Kconfig"

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source "arch/arm/mach-pxa/Kconfig"
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source "arch/arm/plat-pxa/Kconfig"
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source "arch/arm/mach-mmp/Kconfig"

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source "arch/arm/mach-sa1100/Kconfig"

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source "arch/arm/plat-omap/Kconfig"

source "arch/arm/mach-omap1/Kconfig"
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source "arch/arm/mach-omap2/Kconfig"

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source "arch/arm/plat-s3c64xx/Kconfig"
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source "arch/arm/plat-s3c/Kconfig"
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if ARCH_S3C2410
source "arch/arm/mach-s3c2400/Kconfig"
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source "arch/arm/mach-s3c2410/Kconfig"
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source "arch/arm/mach-s3c2412/Kconfig"
source "arch/arm/mach-s3c2440/Kconfig"
source "arch/arm/mach-s3c2442/Kconfig"
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source "arch/arm/mach-s3c2443/Kconfig"
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endif
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if ARCH_S3C64XX
source "arch/arm/mach-s3c6400/Kconfig"
source "arch/arm/mach-s3c6410/Kconfig"
endif

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source "arch/arm/mach-lh7a40x/Kconfig"

source "arch/arm/mach-h720x/Kconfig"

source "arch/arm/mach-versatile/Kconfig"

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source "arch/arm/mach-aaec2000/Kconfig"

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source "arch/arm/mach-netx/Kconfig"

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source "arch/arm/mach-ks8695/Kconfig"

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source "arch/arm/mach-msm/Kconfig"

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source "arch/arm/mach-w90x900/Kconfig"

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# Definitions to make life easier
config ARCH_ACORN
	bool

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config PLAT_IOP
	bool

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config PLAT_ORION
	bool

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config PLAT_PXA
	bool

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source arch/arm/mm/Kconfig

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config IWMMXT
	bool "Enable iWMMXt support"
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	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
	default y if PXA27x || PXA3xx || ARCH_MMP
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	help
	  Enable support for iWMMXt context switching at run time if
	  running on a CPU that supports it.

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#  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
config XSCALE_PMU
	bool
	depends on CPU_XSCALE && !XSCALE_PMU_TIMER
	default y

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if !MMU
source "arch/arm/Kconfig-nommu"
endif

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config ARM_ERRATA_411920
	bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
	depends on CPU_V6 && !SMP
	help
	  Invalidation of the Instruction Cache operation can
	  fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
	  It does not affect the MPCore. This option enables the ARM Ltd.
	  recommended workaround.

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config ARM_ERRATA_430973
	bool "ARM errata: Stale prediction on replaced interworking branch"
	depends on CPU_V7
	help
	  This option enables the workaround for the 430973 Cortex-A8
	  (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
	  interworking branch is replaced with another code sequence at the
	  same virtual address, whether due to self-modifying code or virtual
	  to physical address re-mapping, Cortex-A8 does not recover from the
	  stale interworking branch prediction. This results in Cortex-A8
	  executing the new code sequence in the incorrect ARM or Thumb state.
	  The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
	  and also flushes the branch target cache at every context switch.
	  Note that setting specific bits in the ACTLR register may not be
	  available in non-secure mode.

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config ARM_ERRATA_458693
	bool "ARM errata: Processor deadlock when a false hazard is created"
	depends on CPU_V7
	help
	  This option enables the workaround for the 458693 Cortex-A8 (r2p0)
	  erratum. For very specific sequences of memory operations, it is
	  possible for a hazard condition intended for a cache line to instead
	  be incorrectly associated with a different cache line. This false
	  hazard might then cause a processor deadlock. The workaround enables
	  the L1 caching of the NEON accesses and disables the PLD instruction
	  in the ACTLR register. Note that setting specific bits in the ACTLR
	  register may not be available in non-secure mode.

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config ARM_ERRATA_460075
	bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
	depends on CPU_V7
	help
	  This option enables the workaround for the 460075 Cortex-A8 (r2p0)
	  erratum. Any asynchronous access to the L2 cache may encounter a
	  situation in which recent store transactions to the L2 cache are lost
	  and overwritten with stale memory contents from external memory. The
	  workaround disables the write-allocate mode for the L2 cache via the
	  ACTLR register. Note that setting specific bits in the ACTLR register
	  may not be available in non-secure mode.

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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.

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# Select ISA DMA controller support
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config ISA_DMA
	bool
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	select ISA_DMA_API
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# Select ISA DMA interface
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config ISA_DMA_API
	bool

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config PCI
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	bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
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	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.

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config PCI_SYSCALL
	def_bool PCI

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# Select the host bridge type
config PCI_HOST_VIA82C505
	bool
	depends on PCI && ARCH_SHARK
	default y

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config PCI_HOST_ITE8152
	bool
	depends on PCI && MACH_ARMCORE
	default y
	select DMABOUNCE

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source "drivers/pci/Kconfig"

source "drivers/pcmcia/Kconfig"

endmenu

menu "Kernel Features"

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source "kernel/time/Kconfig"

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config SMP
	bool "Symmetric Multi-Processing (EXPERIMENTAL)"
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	depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
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	select USE_GENERIC_SMP_HELPERS
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	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.

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

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choice
	prompt "Memory split"
	default VMSPLIT_3G
	help
	  Select the desired split between kernel and user memory.

	  If you are not absolutely sure what you are doing, leave this
	  option alone!

	config VMSPLIT_3G
		bool "3G/1G user/kernel split"
	config VMSPLIT_2G
		bool "2G/2G user/kernel split"
	config VMSPLIT_1G
		bool "1G/3G user/kernel split"
endchoice

config PAGE_OFFSET
	hex
	default 0x40000000 if VMSPLIT_1G
	default 0x80000000 if VMSPLIT_2G
	default 0xC0000000

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config NR_CPUS
	int "Maximum number of CPUs (2-32)"
	range 2 32
	depends on SMP
	default "4"

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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.

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config LOCAL_TIMERS
	bool "Use local timer interrupts"
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	depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
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	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.

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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.

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config HZ
	int
	default 128 if ARCH_L7200
	default 200 if ARCH_EBSA110 || ARCH_S3C2410
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	default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
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	default AT91_TIMER_HZ if ARCH_AT91
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	default 100

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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.

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config OABI_COMPAT
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	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
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	depends on AEABI && EXPERIMENTAL
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	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.

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config ARCH_FLATMEM_HAS_HOLES
	bool
	default y
	depends on FLATMEM

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# Discontigmem is deprecated
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config ARCH_DISCONTIGMEM_ENABLE
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	bool

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config ARCH_SPARSEMEM_ENABLE
	bool

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config ARCH_SPARSEMEM_DEFAULT
	def_bool ARCH_SPARSEMEM_ENABLE

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config ARCH_SELECT_MEMORY_MODEL
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	def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
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config NODES_SHIFT
	int
	default "4" if ARCH_LH7A40X
	default "2"
	depends on NEED_MULTIPLE_NODES

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config HIGHMEM
	bool "High Memory Support (EXPERIMENTAL)"
	depends on MMU && EXPERIMENTAL
	help
	  The address space of ARM processors is only 4 Gigabytes large
	  and it has to accommodate user address space, kernel address
	  space as well as some memory mapped IO. That means that, if you
	  have a large amount of physical memory and/or IO, not all of the
	  memory can be "permanently mapped" by the kernel. The physical
	  memory that is not permanently mapped is called "high memory".

	  Depending on the selected kernel/user memory split, minimum
	  vmalloc space and actual amount of RAM, you may not need this
	  option which should result in a slightly faster kernel.

	  If unsure, say n.

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source "mm/Kconfig"

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config LEDS
	bool "Timer and CPU usage LEDs"
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	depends on ARCH_CDB89712 || ARCH_EBSA110 || \
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		   ARCH_EBSA285 || ARCH_INTEGRATOR || \
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		   ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
		   ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
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		   ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
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		   ARCH_AT91 || ARCH_DAVINCI || \
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		   ARCH_KS8695 || MACH_RD88F5182
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	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) || \
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			    OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
			    || MACH_OMAP_PERSEUS2
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	depends on LEDS
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	depends on !GENERIC_CLOCKEVENTS
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	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 && \
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			!ARCH_OMAP) \
			|| OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
			|| MACH_OMAP_PERSEUS2
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	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
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	depends on CPU_CP15_MMU
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	default y if !ARCH_EBSA110
	help
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	  ARM processors cannot fetch/store information which is not
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	  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
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	  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.
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	  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.

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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
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	  but it is independent of the system firmware.   And like a reboot
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	  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.

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config ATAGS_PROC
	bool "Export atags in procfs"
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	depends on KEXEC
	default y
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	help
	  Should the atags used to boot the kernel be exported in an "atags"
	  file in procfs. Useful with kexec.

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endmenu

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menu "CPU Power Management"
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if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_PXA)
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source "drivers/cpufreq/Kconfig"

config CPU_FREQ_SA1100
	bool
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	depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
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	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.

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config CPU_FREQ_PXA
	bool
	depends on CPU_FREQ && ARCH_PXA && PXA25x
	default y
	select CPU_FREQ_DEFAULT_GOV_USERSPACE
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endif

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source "drivers/cpuidle/Kconfig"

endmenu

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menu "Floating point emulation"

comment "At least one emulation must be selected"

config FPE_NWFPE
	bool "NWFPE math emulation"
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	depends on !AEABI || OABI_COMPAT
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	---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"
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	depends on FPE_NWFPE
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	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)"
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	depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
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	---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"
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	depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
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	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.

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config VFPv3
	bool
	depends on VFP
	default y if CPU_V7

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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.

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endmenu

menu "Userspace binary formats"

source "fs/Kconfig.binfmt"

config ARTHUR
	tristate "RISC OS personality"
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	depends on !AEABI
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	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"

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source "kernel/power/Kconfig"
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config ARCH_SUSPEND_POSSIBLE
	def_bool y

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endmenu

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source "net/Kconfig"

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menu "Device Drivers"

source "drivers/base/Kconfig"

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source "drivers/connector/Kconfig"

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if ALIGNMENT_TRAP || !CPU_CP15_MMU
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source "drivers/mtd/Kconfig"
endif

source "drivers/parport/Kconfig"

source "drivers/pnp/Kconfig"

source "drivers/block/Kconfig"

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# misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4

source "drivers/misc/Kconfig"

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source "drivers/ide/Kconfig"

source "drivers/scsi/Kconfig"

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source "drivers/ata/Kconfig"

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source "drivers/md/Kconfig"

source "drivers/message/fusion/Kconfig"

source "drivers/ieee1394/Kconfig"

source "drivers/message/i2o/Kconfig"

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source "drivers/net/Kconfig"
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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"

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source "drivers/spi/Kconfig"

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source "drivers/gpio/Kconfig"

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source "drivers/w1/Kconfig"

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source "drivers/power/Kconfig"

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source "drivers/hwmon/Kconfig"