Kconfig 65.7 KB
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config ARM
	bool
	default y
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	select ARCH_BINFMT_ELF_RANDOMIZE_PIE
	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
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	select ARCH_HAVE_CUSTOM_GPIO_H
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	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
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	select ARCH_WANT_IPC_PARSE_VERSION
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	select BUILDTIME_EXTABLE_SORT if MMU
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	select CPU_PM if (SUSPEND || CPU_IDLE)
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	select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
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	select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
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	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
	select GENERIC_IRQ_PROBE
	select GENERIC_IRQ_SHOW
	select GENERIC_PCI_IOMAP
	select GENERIC_SMP_IDLE_THREAD
	select GENERIC_STRNCPY_FROM_USER
	select GENERIC_STRNLEN_USER
	select HARDIRQS_SW_RESEND
	select HAVE_AOUT
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	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
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	select HAVE_ARCH_KGDB
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	select HAVE_ARCH_SECCOMP_FILTER
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	select HAVE_ARCH_TRACEHOOK
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	select HAVE_BPF_JIT
	select HAVE_C_RECORDMCOUNT
	select HAVE_DEBUG_KMEMLEAK
	select HAVE_DMA_API_DEBUG
	select HAVE_DMA_ATTRS
	select HAVE_DMA_CONTIGUOUS if MMU
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	select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
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	select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
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	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
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	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
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	select HAVE_GENERIC_DMA_COHERENT
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	select HAVE_GENERIC_HARDIRQS
	select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
	select HAVE_IDE if PCI || ISA || PCMCIA
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	select HAVE_KERNEL_GZIP
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	select HAVE_KERNEL_LZMA
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	select HAVE_KERNEL_LZO
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	select HAVE_KERNEL_XZ
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	select HAVE_KPROBES if !XIP_KERNEL
	select HAVE_KRETPROBES if (HAVE_KPROBES)
	select HAVE_MEMBLOCK
	select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
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	select HAVE_PERF_EVENTS
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	select HAVE_REGS_AND_STACK_ACCESS_API
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	select HAVE_SYSCALL_TRACEPOINTS
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	select HAVE_UID16
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	select KTIME_SCALAR
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	select PERF_USE_VMALLOC
	select RTC_LIB
	select SYS_SUPPORTS_APM_EMULATION
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	select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
	select MODULES_USE_ELF_REL
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	select CLONE_BACKWARDS
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	select OLD_SIGSUSPEND3
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	select OLD_SIGACTION
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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 ARM_HAS_SG_CHAIN
	bool

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config NEED_SG_DMA_LENGTH
	bool

config ARM_DMA_USE_IOMMU
	bool
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	select ARM_HAS_SG_CHAIN
	select NEED_SG_DMA_LENGTH
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config HAVE_PWM
	bool

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config MIGHT_HAVE_PCI
	bool

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config SYS_SUPPORTS_APM_EMULATION
	bool

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config GENERIC_GPIO
	bool

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config HAVE_TCM
	bool
	select GENERIC_ALLOCATOR

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config HAVE_PROC_CPU
	bool

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config NO_IOPORT
	bool

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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

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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 RWSEM_GENERIC_SPINLOCK
	bool
	default y

config RWSEM_XCHGADD_ALGORITHM
	bool

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config ARCH_HAS_ILOG2_U32
	bool

config ARCH_HAS_ILOG2_U64
	bool

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config ARCH_HAS_CPUFREQ
	bool
	help
	  Internal node to signify that the ARCH has CPUFREQ support
	  and that the relevant menu configurations are displayed for
	  it.

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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 NEED_DMA_MAP_STATE
       def_bool y

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config ARCH_HAS_DMA_SET_COHERENT_MASK
	bool

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config GENERIC_ISA_DMA
	bool

config FIQ
	bool

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config NEED_RET_TO_USER
	bool

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config ARCH_MTD_XIP
	bool

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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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config ARM_PATCH_PHYS_VIRT
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	bool "Patch physical to virtual translations at runtime" if EMBEDDED
	default y
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	depends on !XIP_KERNEL && MMU
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	depends on !ARCH_REALVIEW || !SPARSEMEM
	help
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	  Patch phys-to-virt and virt-to-phys translation functions at
	  boot and module load time according to the position of the
	  kernel in system memory.
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	  This can only be used with non-XIP MMU kernels where the base
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	  of physical memory is at a 16MB boundary.
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	  Only disable this option if you know that you do not require
	  this feature (eg, building a kernel for a single machine) and
	  you need to shrink the kernel to the minimal size.
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config NEED_MACH_GPIO_H
	bool
	help
	  Select this when mach/gpio.h is required to provide special
	  definitions for this platform. The need for mach/gpio.h should
	  be avoided when possible.

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config NEED_MACH_IO_H
	bool
	help
	  Select this when mach/io.h is required to provide special
	  definitions for this platform.  The need for mach/io.h should
	  be avoided when possible.

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config NEED_MACH_MEMORY_H
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	bool
	help
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	  Select this when mach/memory.h is required to provide special
	  definitions for this platform.  The need for mach/memory.h should
	  be avoided when possible.
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config PHYS_OFFSET
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	hex "Physical address of main memory" if MMU
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	depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
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	default DRAM_BASE if !MMU
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	help
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	  Please provide the physical address corresponding to the
	  location of main memory in your system.
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config GENERIC_BUG
	def_bool y
	depends on BUG

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source "init/Kconfig"

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source "kernel/Kconfig.freezer"

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menu "System Type"

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config MMU
	bool "MMU-based Paged Memory Management Support"
	default y
	help
	  Select if you want MMU-based virtualised addressing space
	  support by paged memory management. If unsure, say 'Y'.

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#
# The "ARM system type" choice list is ordered alphabetically by option
# text.  Please add new entries in the option alphabetic order.
#
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choice
	prompt "ARM system type"
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	default ARCH_VERSATILE if !MMU
	default ARCH_MULTIPLATFORM if MMU
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config ARCH_MULTIPLATFORM
	bool "Allow multiple platforms to be selected"
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	depends on MMU
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	select ARM_PATCH_PHYS_VIRT
	select AUTO_ZRELADDR
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	select COMMON_CLK
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	select MULTI_IRQ_HANDLER
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	select SPARSE_IRQ
	select USE_OF

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config ARCH_INTEGRATOR
	bool "ARM Ltd. Integrator family"
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	select ARCH_HAS_CPUFREQ
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	select ARM_AMBA
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	select COMMON_CLK
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	select COMMON_CLK_VERSATILE
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	select GENERIC_CLOCKEVENTS
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	select HAVE_TCM
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	select ICST
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	select MULTI_IRQ_HANDLER
	select NEED_MACH_MEMORY_H
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	select PLAT_VERSATILE
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	select SPARSE_IRQ
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	select VERSATILE_FPGA_IRQ
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	help
	  Support for ARM's Integrator platform.

config ARCH_REALVIEW
	bool "ARM Ltd. RealView family"
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	select ARCH_WANT_OPTIONAL_GPIOLIB
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	select ARM_AMBA
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	select ARM_TIMER_SP804
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	select COMMON_CLK
	select COMMON_CLK_VERSATILE
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	select GENERIC_CLOCKEVENTS
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	select GPIO_PL061 if GPIOLIB
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	select ICST
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	select NEED_MACH_MEMORY_H
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	select PLAT_VERSATILE
	select PLAT_VERSATILE_CLCD
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	help
	  This enables support for ARM Ltd RealView boards.

config ARCH_VERSATILE
	bool "ARM Ltd. Versatile family"
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	select ARCH_WANT_OPTIONAL_GPIOLIB
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	select ARM_AMBA
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	select ARM_TIMER_SP804
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	select ARM_VIC
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	select CLKDEV_LOOKUP
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	select GENERIC_CLOCKEVENTS
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	select HAVE_MACH_CLKDEV
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	select ICST
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	select PLAT_VERSATILE
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	select PLAT_VERSATILE_CLCD
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	select PLAT_VERSATILE_CLOCK
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	select VERSATILE_FPGA_IRQ
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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 ARCH_REQUIRE_GPIOLIB
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	select CLKDEV_LOOKUP
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	select HAVE_CLK
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	select IRQ_DOMAIN
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	select NEED_MACH_GPIO_H
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	select NEED_MACH_IO_H if PCCARD
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	select PINCTRL
	select PINCTRL_AT91 if USE_OF
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	help
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	  This enables support for systems based on Atmel
	  AT91RM9200 and AT91SAM9* processors.
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config ARCH_BCM2835
	bool "Broadcom BCM2835 family"
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	select ARCH_REQUIRE_GPIOLIB
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	select ARM_AMBA
	select ARM_ERRATA_411920
	select ARM_TIMER_SP804
	select CLKDEV_LOOKUP
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	select CLKSRC_OF
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	select COMMON_CLK
	select CPU_V6
	select GENERIC_CLOCKEVENTS
	select MULTI_IRQ_HANDLER
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	select PINCTRL
	select PINCTRL_BCM2835
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	select SPARSE_IRQ
	select USE_OF
	help
	  This enables support for the Broadcom BCM2835 SoC. This SoC is
	  use in the Raspberry Pi, and Roku 2 devices.

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config ARCH_CNS3XXX
	bool "Cavium Networks CNS3XXX family"
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	select ARM_GIC
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	select CPU_V6K
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	select GENERIC_CLOCKEVENTS
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	select MIGHT_HAVE_CACHE_L2X0
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	select MIGHT_HAVE_PCI
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	select PCI_DOMAINS if PCI
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	help
	  Support for Cavium Networks CNS3XXX platform.

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config ARCH_CLPS711X
	bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
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	select ARCH_REQUIRE_GPIOLIB
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	select AUTO_ZRELADDR
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	select CLKDEV_LOOKUP
	select COMMON_CLK
	select CPU_ARM720T
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	select GENERIC_CLOCKEVENTS
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	select MULTI_IRQ_HANDLER
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	select NEED_MACH_MEMORY_H
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	select SPARSE_IRQ
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	help
	  Support for Cirrus Logic 711x/721x/731x based boards.

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

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config ARCH_SIRF
	bool "CSR SiRF"
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	select ARCH_REQUIRE_GPIOLIB
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	select AUTO_ZRELADDR
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	select COMMON_CLK
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	select GENERIC_CLOCKEVENTS
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	select GENERIC_IRQ_CHIP
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	select MIGHT_HAVE_CACHE_L2X0
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	select NO_IOPORT
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	select PINCTRL
	select PINCTRL_SIRF
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	select USE_OF
	help
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	  Support for CSR SiRFprimaII/Marco/Polo platforms
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config ARCH_EBSA110
	bool "EBSA-110"
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	select ARCH_USES_GETTIMEOFFSET
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	select CPU_SA110
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	select ISA
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	select NEED_MACH_IO_H
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	select NEED_MACH_MEMORY_H
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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 ARCH_HAS_HOLES_MEMORYMODEL
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_USES_GETTIMEOFFSET
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	select ARM_AMBA
	select ARM_VIC
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	select CLKDEV_LOOKUP
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	select CPU_ARM920T
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	select NEED_MACH_MEMORY_H
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	help
	  This enables support for the Cirrus EP93xx series of CPUs.

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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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	select GENERIC_CLOCKEVENTS
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	select HAVE_IDE
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	select NEED_MACH_IO_H if !MMU
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	select NEED_MACH_MEMORY_H
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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_MXS
	bool "Freescale MXS-based"
	select ARCH_REQUIRE_GPIOLIB
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	select CLKDEV_LOOKUP
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	select CLKSRC_MMIO
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	select COMMON_CLK
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	select GENERIC_CLOCKEVENTS
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	select HAVE_CLK_PREPARE
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	select MULTI_IRQ_HANDLER
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	select PINCTRL
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	select SPARSE_IRQ
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	select USE_OF
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	help
	  Support for Freescale MXS-based family of processors

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config ARCH_NETX
	bool "Hilscher NetX based"
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	select ARM_VIC
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	select CLKSRC_MMIO
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	select CPU_ARM926T
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	select GENERIC_CLOCKEVENTS
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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 ARCH_USES_GETTIMEOFFSET
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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
	select ARCH_SUPPORTS_MSI
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	select CPU_XSC3
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	select NEED_MACH_MEMORY_H
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	select NEED_RET_TO_USER
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	select PCI
	select PLAT_IOP
	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 ARCH_REQUIRE_GPIOLIB
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	select CPU_XSCALE
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	select NEED_MACH_GPIO_H
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	select NEED_RET_TO_USER
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	select PCI
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	select PLAT_IOP
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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 ARCH_REQUIRE_GPIOLIB
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	select CPU_XSCALE
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	select NEED_MACH_GPIO_H
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	select NEED_RET_TO_USER
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	select PCI
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	select PLAT_IOP
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	help
	  Support for Intel's IOP33X (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 ARCH_HAS_DMA_SET_COHERENT_MASK
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	select ARCH_REQUIRE_GPIOLIB
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	select CLKSRC_MMIO
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	select CPU_XSCALE
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	select DMABOUNCE if PCI
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	select GENERIC_CLOCKEVENTS
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	select MIGHT_HAVE_PCI
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	select NEED_MACH_IO_H
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	help
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	  Support for Intel's IXP4XX (XScale) family of processors.
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config ARCH_DOVE
	bool "Marvell Dove"
	select ARCH_REQUIRE_GPIOLIB
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	select COMMON_CLK_DOVE
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	select CPU_V7
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	select GENERIC_CLOCKEVENTS
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	select MIGHT_HAVE_PCI
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	select PINCTRL
	select PINCTRL_DOVE
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	select PLAT_ORION_LEGACY
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	select USB_ARCH_HAS_EHCI
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	help
	  Support for the Marvell Dove SoC 88AP510

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config ARCH_KIRKWOOD
	bool "Marvell Kirkwood"
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	select ARCH_REQUIRE_GPIOLIB
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	select CPU_FEROCEON
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	select GENERIC_CLOCKEVENTS
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	select PCI
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	select PCI_QUIRKS
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	select PINCTRL
	select PINCTRL_KIRKWOOD
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	select PLAT_ORION_LEGACY
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	help
	  Support for the following Marvell Kirkwood series SoCs:
	  88F6180, 88F6192 and 88F6281.

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

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config ARCH_ORION5X
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	bool "Marvell Orion"
	depends on MMU
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	select ARCH_REQUIRE_GPIOLIB
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	select CPU_FEROCEON
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	select GENERIC_CLOCKEVENTS
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	select PCI
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	select PLAT_ORION_LEGACY
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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_MMP
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	bool "Marvell PXA168/910/MMP2"
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	depends on MMU
	select ARCH_REQUIRE_GPIOLIB
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	select CLKDEV_LOOKUP
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	select GENERIC_ALLOCATOR
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	select GENERIC_CLOCKEVENTS
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	select GPIO_PXA
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	select IRQ_DOMAIN
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	select NEED_MACH_GPIO_H
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	select PINCTRL
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	select PLAT_PXA
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	select SPARSE_IRQ
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	help
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	  Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
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config ARCH_KS8695
	bool "Micrel/Kendin KS8695"
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	select ARCH_REQUIRE_GPIOLIB
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	select CLKSRC_MMIO
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	select CPU_ARM922T
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	select GENERIC_CLOCKEVENTS
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	select NEED_MACH_MEMORY_H
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	help
	  Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
	  System-on-Chip devices.

config ARCH_W90X900
	bool "Nuvoton W90X900 CPU"
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	select ARCH_REQUIRE_GPIOLIB
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	select CLKDEV_LOOKUP
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	select CLKSRC_MMIO
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	select CPU_ARM926T
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	select GENERIC_CLOCKEVENTS
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	help
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	  Support for Nuvoton (Winbond logic dept.) ARM9 processor,
	  At present, the w90x900 has been renamed nuc900, regarding
	  the ARM series product line, you can login the following
	  link address to know more.

	  <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
		ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
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config ARCH_LPC32XX
	bool "NXP LPC32XX"
	select ARCH_REQUIRE_GPIOLIB
	select ARM_AMBA
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
	select CPU_ARM926T
	select GENERIC_CLOCKEVENTS
	select HAVE_IDE
	select HAVE_PWM
	select USB_ARCH_HAS_OHCI
	select USE_OF
	help
	  Support for the NXP LPC32XX family of processors

644 645
config ARCH_TEGRA
	bool "NVIDIA Tegra"
646
	select ARCH_HAS_CPUFREQ
647
	select ARCH_REQUIRE_GPIOLIB
R
Russell King 已提交
648
	select CLKDEV_LOOKUP
649
	select CLKSRC_MMIO
650
	select CLKSRC_OF
651
	select COMMON_CLK
652 653
	select GENERIC_CLOCKEVENTS
	select HAVE_CLK
654
	select HAVE_SMP
655
	select MIGHT_HAVE_CACHE_L2X0
S
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656
	select SPARSE_IRQ
657
	select USE_OF
658 659 660 661
	help
	  This enables support for NVIDIA Tegra based systems (Tegra APX,
	  Tegra 6xx and Tegra 2 series).

L
Linus Torvalds 已提交
662
config ARCH_PXA
E
eric miao 已提交
663
	bool "PXA2xx/PXA3xx-based"
664
	depends on MMU
665
	select ARCH_HAS_CPUFREQ
666 667 668 669
	select ARCH_MTD_XIP
	select ARCH_REQUIRE_GPIOLIB
	select ARM_CPU_SUSPEND if PM
	select AUTO_ZRELADDR
670
	select CLKDEV_LOOKUP
671
	select CLKSRC_MMIO
672
	select GENERIC_CLOCKEVENTS
673
	select GPIO_PXA
674
	select HAVE_IDE
675
	select MULTI_IRQ_HANDLER
676
	select NEED_MACH_GPIO_H
677 678
	select PLAT_PXA
	select SPARSE_IRQ
679
	help
E
eric miao 已提交
680
	  Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
L
Linus Torvalds 已提交
681

682 683
config ARCH_MSM
	bool "Qualcomm MSM"
P
Pavel Machek 已提交
684
	select ARCH_REQUIRE_GPIOLIB
S
Stephen Boyd 已提交
685
	select CLKDEV_LOOKUP
686 687
	select GENERIC_CLOCKEVENTS
	select HAVE_CLK
688
	help
689 690 691 692 693
	  Support for Qualcomm MSM/QSD based systems.  This runs on the
	  apps processor of the MSM/QSD and depends on a shared memory
	  interface to the modem processor which runs the baseband
	  stack and controls some vital subsystems
	  (clock and power control, etc).
694

695
config ARCH_SHMOBILE
696
	bool "Renesas SH-Mobile / R-Mobile"
P
Paul Mundt 已提交
697
	select CLKDEV_LOOKUP
698 699
	select GENERIC_CLOCKEVENTS
	select HAVE_CLK
700
	select HAVE_MACH_CLKDEV
701
	select HAVE_SMP
702
	select MIGHT_HAVE_CACHE_L2X0
703
	select MULTI_IRQ_HANDLER
704
	select NEED_MACH_MEMORY_H
705
	select NO_IOPORT
L
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706
	select PINCTRL
707 708
	select PM_GENERIC_DOMAINS if PM
	select SPARSE_IRQ
709
	help
710
	  Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
711

L
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712 713 714
config ARCH_RPC
	bool "RiscPC"
	select ARCH_ACORN
715
	select ARCH_MAY_HAVE_PC_FDC
716
	select ARCH_SPARSEMEM_ENABLE
717
	select ARCH_USES_GETTIMEOFFSET
718
	select FIQ
719
	select HAVE_IDE
720 721
	select HAVE_PATA_PLATFORM
	select ISA_DMA_API
722
	select NEED_MACH_IO_H
723
	select NEED_MACH_MEMORY_H
724
	select NO_IOPORT
L
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725 726 727 728 729 730
	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"
731
	select ARCH_HAS_CPUFREQ
732 733 734 735 736
	select ARCH_MTD_XIP
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_SPARSEMEM_ENABLE
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
R
Russell King 已提交
737
	select CPU_FREQ
738
	select CPU_SA1100
739
	select GENERIC_CLOCKEVENTS
740
	select HAVE_IDE
741
	select ISA
742
	select NEED_MACH_GPIO_H
743
	select NEED_MACH_MEMORY_H
744
	select SPARSE_IRQ
745 746
	help
	  Support for StrongARM 11x0 based boards.
L
Linus Torvalds 已提交
747

748 749
config ARCH_S3C24XX
	bool "Samsung S3C24XX SoCs"
B
Ben Dooks 已提交
750
	select ARCH_HAS_CPUFREQ
751
	select ARCH_USES_GETTIMEOFFSET
752 753
	select CLKDEV_LOOKUP
	select HAVE_CLK
754
	select HAVE_S3C2410_I2C if I2C
755
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
756
	select HAVE_S3C_RTC if RTC_CLASS
757
	select NEED_MACH_GPIO_H
758
	select NEED_MACH_IO_H
L
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759
	help
760 761 762 763
	  Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
	  and S3C2450 SoCs 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).
764

B
Ben Dooks 已提交
765 766
config ARCH_S3C64XX
	bool "Samsung S3C64XX"
767 768 769
	select ARCH_HAS_CPUFREQ
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_USES_GETTIMEOFFSET
770
	select ARM_VIC
771 772
	select CLKDEV_LOOKUP
	select CPU_V6
B
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773
	select HAVE_CLK
774 775
	select HAVE_S3C2410_I2C if I2C
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
M
Mark Brown 已提交
776
	select HAVE_TCM
777
	select NEED_MACH_GPIO_H
778
	select NO_IOPORT
779 780 781
	select PLAT_SAMSUNG
	select S3C_DEV_NAND
	select S3C_GPIO_TRACK
782
	select SAMSUNG_CLKSRC
783
	select SAMSUNG_GPIOLIB_4BIT
784 785
	select SAMSUNG_IRQ_VIC_TIMER
	select USB_ARCH_HAS_OHCI
B
Ben Dooks 已提交
786 787 788
	help
	  Samsung S3C64XX series based systems

789 790
config ARCH_S5P64X0
	bool "Samsung S5P6440 S5P6450"
791
	select CLKDEV_LOOKUP
792
	select CLKSRC_MMIO
793
	select CPU_V6
794
	select GENERIC_CLOCKEVENTS
795
	select HAVE_CLK
796
	select HAVE_S3C2410_I2C if I2C
797
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
798
	select HAVE_S3C_RTC if RTC_CLASS
799
	select NEED_MACH_GPIO_H
800
	help
801 802
	  Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
	  SMDK6450.
803

804 805
config ARCH_S5PC100
	bool "Samsung S5PC100"
806
	select ARCH_USES_GETTIMEOFFSET
807
	select CLKDEV_LOOKUP
808
	select CPU_V7
809
	select HAVE_CLK
810
	select HAVE_S3C2410_I2C if I2C
811
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
812
	select HAVE_S3C_RTC if RTC_CLASS
813
	select NEED_MACH_GPIO_H
814
	help
815
	  Samsung S5PC100 series based systems
816

817 818
config ARCH_S5PV210
	bool "Samsung S5PV210/S5PC110"
819
	select ARCH_HAS_CPUFREQ
820
	select ARCH_HAS_HOLES_MEMORYMODEL
821
	select ARCH_SPARSEMEM_ENABLE
822
	select CLKDEV_LOOKUP
823
	select CLKSRC_MMIO
824
	select CPU_V7
825
	select GENERIC_CLOCKEVENTS
826
	select HAVE_CLK
827
	select HAVE_S3C2410_I2C if I2C
828
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
829
	select HAVE_S3C_RTC if RTC_CLASS
830
	select NEED_MACH_GPIO_H
831
	select NEED_MACH_MEMORY_H
832 833 834
	help
	  Samsung S5PV210/S5PC110 series based systems

835
config ARCH_EXYNOS
836
	bool "Samsung EXYNOS"
837
	select ARCH_HAS_CPUFREQ
838
	select ARCH_HAS_HOLES_MEMORYMODEL
839
	select ARCH_SPARSEMEM_ENABLE
840
	select CLKDEV_LOOKUP
841
	select CPU_V7
842
	select GENERIC_CLOCKEVENTS
843
	select HAVE_CLK
844
	select HAVE_S3C2410_I2C if I2C
845
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
846
	select HAVE_S3C_RTC if RTC_CLASS
847
	select NEED_MACH_GPIO_H
848
	select NEED_MACH_MEMORY_H
849
	help
850
	  Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
851

L
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852 853
config ARCH_SHARK
	bool "Shark"
854
	select ARCH_USES_GETTIMEOFFSET
855
	select CPU_SA110
856 857
	select ISA
	select ISA_DMA
858
	select NEED_MACH_MEMORY_H
859 860
	select PCI
	select ZONE_DMA
861 862 863
	help
	  Support for the StrongARM based Digital DNARD machine, also known
	  as "Shark" (<http://www.shark-linux.de/shark.html>).
L
Linus Torvalds 已提交
864

865 866 867
config ARCH_U300
	bool "ST-Ericsson U300 Series"
	depends on MMU
868
	select ARCH_REQUIRE_GPIOLIB
869
	select ARM_AMBA
870
	select ARM_PATCH_PHYS_VIRT
871
	select ARM_VIC
872
	select CLKDEV_LOOKUP
873
	select CLKSRC_MMIO
874
	select COMMON_CLK
875 876 877
	select CPU_ARM926T
	select GENERIC_CLOCKEVENTS
	select HAVE_TCM
878
	select SPARSE_IRQ
879 880 881
	help
	  Support for ST-Ericsson U300 series mobile platforms.

882 883
config ARCH_U8500
	bool "ST-Ericsson U8500 Series"
A
Arnd Bergmann 已提交
884
	depends on MMU
885 886
	select ARCH_HAS_CPUFREQ
	select ARCH_REQUIRE_GPIOLIB
887
	select ARM_AMBA
888
	select CLKDEV_LOOKUP
889 890
	select CPU_V7
	select GENERIC_CLOCKEVENTS
891
	select HAVE_SMP
892
	select MIGHT_HAVE_CACHE_L2X0
893
	select SPARSE_IRQ
894 895 896 897 898
	help
	  Support for ST-Ericsson's Ux500 architecture

config ARCH_NOMADIK
	bool "STMicroelectronics Nomadik"
899
	select ARCH_REQUIRE_GPIOLIB
900 901
	select ARM_AMBA
	select ARM_VIC
902
	select CLKSRC_NOMADIK_MTU
903
	select COMMON_CLK
904
	select CPU_ARM926T
905
	select GENERIC_CLOCKEVENTS
906
	select MIGHT_HAVE_CACHE_L2X0
907
	select USE_OF
908
	select PINCTRL
909
	select PINCTRL_STN8815
910
	select SPARSE_IRQ
911 912 913
	help
	  Support for the Nomadik platform by ST-Ericsson

914 915
config PLAT_SPEAR
	bool "ST SPEAr"
D
Deepak Sikri 已提交
916
	select ARCH_HAS_CPUFREQ
917 918 919 920 921 922 923 924 925 926
	select ARCH_REQUIRE_GPIOLIB
	select ARM_AMBA
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
	select COMMON_CLK
	select GENERIC_CLOCKEVENTS
	select HAVE_CLK
	help
	  Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).

927 928
config ARCH_DAVINCI
	bool "TI DaVinci"
929
	select ARCH_HAS_HOLES_MEMORYMODEL
930
	select ARCH_REQUIRE_GPIOLIB
931
	select CLKDEV_LOOKUP
D
David Brownell 已提交
932
	select GENERIC_ALLOCATOR
933
	select GENERIC_CLOCKEVENTS
R
Russell King 已提交
934
	select GENERIC_IRQ_CHIP
935
	select HAVE_IDE
936
	select NEED_MACH_GPIO_H
937
	select USE_OF
938
	select ZONE_DMA
939 940 941
	help
	  Support for TI's DaVinci platform.

942 943
config ARCH_OMAP1
	bool "TI OMAP1"
A
Arnd Bergmann 已提交
944
	depends on MMU
945
	select ARCH_HAS_CPUFREQ
946
	select ARCH_HAS_HOLES_MEMORYMODEL
947
	select ARCH_OMAP
948
	select ARCH_REQUIRE_GPIOLIB
949
	select CLKDEV_LOOKUP
950
	select CLKSRC_MMIO
951
	select GENERIC_CLOCKEVENTS
952
	select GENERIC_IRQ_CHIP
953
	select HAVE_CLK
954 955 956 957
	select HAVE_IDE
	select IRQ_DOMAIN
	select NEED_MACH_IO_H if PCCARD
	select NEED_MACH_MEMORY_H
958
	help
959
	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
960

L
Linus Torvalds 已提交
961 962
endchoice

R
Rob Herring 已提交
963 964 965 966 967 968 969 970
menu "Multiple platform selection"
	depends on ARCH_MULTIPLATFORM

comment "CPU Core family selection"

config ARCH_MULTI_V4
	bool "ARMv4 based platforms (FA526, StrongARM)"
	depends on !ARCH_MULTI_V6_V7
971
	select ARCH_MULTI_V4_V5
R
Rob Herring 已提交
972 973 974 975

config ARCH_MULTI_V4T
	bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
	depends on !ARCH_MULTI_V6_V7
976
	select ARCH_MULTI_V4_V5
R
Rob Herring 已提交
977 978 979 980

config ARCH_MULTI_V5
	bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
	depends on !ARCH_MULTI_V6_V7
981
	select ARCH_MULTI_V4_V5
R
Rob Herring 已提交
982 983 984 985 986 987 988

config ARCH_MULTI_V4_V5
	bool

config ARCH_MULTI_V6
	bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
	select ARCH_MULTI_V6_V7
989
	select CPU_V6
R
Rob Herring 已提交
990 991 992 993 994

config ARCH_MULTI_V7
	bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
	default y
	select ARCH_MULTI_V6_V7
995 996
	select ARCH_VEXPRESS
	select CPU_V7
R
Rob Herring 已提交
997 998 999 1000 1001 1002 1003 1004 1005 1006

config ARCH_MULTI_V6_V7
	bool

config ARCH_MULTI_CPU_AUTO
	def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
	select ARCH_MULTI_V5

endmenu

1007 1008 1009 1010 1011
#
# This is sorted alphabetically by mach-* pathname.  However, plat-*
# Kconfigs may be included either alphabetically (according to the
# plat- suffix) or along side the corresponding mach-* source.
#
1012 1013
source "arch/arm/mach-mvebu/Kconfig"

1014 1015
source "arch/arm/mach-at91/Kconfig"

1016 1017
source "arch/arm/mach-bcm/Kconfig"

L
Linus Torvalds 已提交
1018 1019
source "arch/arm/mach-clps711x/Kconfig"

1020 1021
source "arch/arm/mach-cns3xxx/Kconfig"

1022 1023 1024 1025
source "arch/arm/mach-davinci/Kconfig"

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

1026 1027
source "arch/arm/mach-ep93xx/Kconfig"

L
Linus Torvalds 已提交
1028 1029
source "arch/arm/mach-footbridge/Kconfig"

1030 1031
source "arch/arm/mach-gemini/Kconfig"

1032 1033
source "arch/arm/mach-h720x/Kconfig"

R
Rob Herring 已提交
1034 1035
source "arch/arm/mach-highbank/Kconfig"

L
Linus Torvalds 已提交
1036 1037
source "arch/arm/mach-integrator/Kconfig"

1038 1039 1040
source "arch/arm/mach-iop32x/Kconfig"

source "arch/arm/mach-iop33x/Kconfig"
L
Linus Torvalds 已提交
1041

1042 1043
source "arch/arm/mach-iop13xx/Kconfig"

L
Linus Torvalds 已提交
1044 1045
source "arch/arm/mach-ixp4xx/Kconfig"

1046 1047 1048 1049 1050 1051
source "arch/arm/mach-kirkwood/Kconfig"

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

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

1052 1053
source "arch/arm/mach-mv78xx0/Kconfig"

S
Shawn Guo 已提交
1054
source "arch/arm/mach-imx/Kconfig"
L
Linus Torvalds 已提交
1055

1056 1057
source "arch/arm/mach-mxs/Kconfig"

1058
source "arch/arm/mach-netx/Kconfig"
1059

1060 1061
source "arch/arm/mach-nomadik/Kconfig"

1062 1063 1064
source "arch/arm/plat-omap/Kconfig"

source "arch/arm/mach-omap1/Kconfig"
L
Linus Torvalds 已提交
1065

1066 1067
source "arch/arm/mach-omap2/Kconfig"

1068
source "arch/arm/mach-orion5x/Kconfig"
1069

R
Rob Herring 已提交
1070 1071
source "arch/arm/mach-picoxcell/Kconfig"

1072 1073
source "arch/arm/mach-pxa/Kconfig"
source "arch/arm/plat-pxa/Kconfig"
1074

1075 1076 1077 1078 1079
source "arch/arm/mach-mmp/Kconfig"

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

source "arch/arm/mach-sa1100/Kconfig"
1080

1081
source "arch/arm/plat-samsung/Kconfig"
1082

R
Rob Herring 已提交
1083 1084
source "arch/arm/mach-socfpga/Kconfig"

1085
source "arch/arm/plat-spear/Kconfig"
1086

1087
source "arch/arm/mach-s3c24xx/Kconfig"
L
Linus Torvalds 已提交
1088

B
Ben Dooks 已提交
1089
if ARCH_S3C64XX
1090
source "arch/arm/mach-s3c64xx/Kconfig"
B
Ben Dooks 已提交
1091 1092
endif

1093
source "arch/arm/mach-s5p64x0/Kconfig"
1094

1095 1096
source "arch/arm/mach-s5pc100/Kconfig"

1097 1098
source "arch/arm/mach-s5pv210/Kconfig"

1099
source "arch/arm/mach-exynos/Kconfig"
1100

1101
source "arch/arm/mach-shmobile/Kconfig"
1102

1103 1104
source "arch/arm/mach-sunxi/Kconfig"

1105 1106
source "arch/arm/mach-prima2/Kconfig"

1107 1108
source "arch/arm/mach-tegra/Kconfig"

1109
source "arch/arm/mach-u300/Kconfig"
L
Linus Torvalds 已提交
1110

1111
source "arch/arm/mach-ux500/Kconfig"
L
Linus Torvalds 已提交
1112 1113 1114

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

1115
source "arch/arm/mach-vexpress/Kconfig"
1116
source "arch/arm/plat-versatile/Kconfig"
1117

1118 1119
source "arch/arm/mach-virt/Kconfig"

1120 1121
source "arch/arm/mach-vt8500/Kconfig"

1122 1123
source "arch/arm/mach-w90x900/Kconfig"

1124 1125
source "arch/arm/mach-zynq/Kconfig"

L
Linus Torvalds 已提交
1126 1127 1128 1129
# Definitions to make life easier
config ARCH_ACORN
	bool

1130 1131
config PLAT_IOP
	bool
M
Mikael Pettersson 已提交
1132
	select GENERIC_CLOCKEVENTS
1133

L
Lennert Buytenhek 已提交
1134 1135
config PLAT_ORION
	bool
1136
	select CLKSRC_MMIO
1137
	select COMMON_CLK
R
Russell King 已提交
1138
	select GENERIC_IRQ_CHIP
1139
	select IRQ_DOMAIN
L
Lennert Buytenhek 已提交
1140

1141 1142 1143 1144
config PLAT_ORION_LEGACY
	bool
	select PLAT_ORION

1145 1146 1147
config PLAT_PXA
	bool

1148 1149 1150
config PLAT_VERSATILE
	bool

1151 1152
config ARM_TIMER_SP804
	bool
1153
	select CLKSRC_MMIO
1154
	select HAVE_SCHED_CLOCK
1155

L
Linus Torvalds 已提交
1156 1157
source arch/arm/mm/Kconfig

1158 1159 1160 1161 1162
config ARM_NR_BANKS
	int
	default 16 if ARCH_EP93XX
	default 8

1163 1164
config IWMMXT
	bool "Enable iWMMXt support"
1165
	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
H
Haojian Zhuang 已提交
1166
	default y if PXA27x || PXA3xx || ARCH_MMP
1167 1168 1169 1170
	help
	  Enable support for iWMMXt context switching at run time if
	  running on a CPU that supports it.

L
Linus Torvalds 已提交
1171 1172
config XSCALE_PMU
	bool
1173
	depends on CPU_XSCALE
L
Linus Torvalds 已提交
1174 1175
	default y

1176 1177 1178 1179 1180
config MULTI_IRQ_HANDLER
	bool
	help
	  Allow each machine to specify it's own IRQ handler at run time.

1181 1182 1183 1184
if !MMU
source "arch/arm/Kconfig-nommu"
endif

1185 1186 1187 1188 1189 1190 1191 1192 1193
config ARM_ERRATA_326103
	bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
	depends on CPU_V6
	help
	  Executing a SWP instruction to read-only memory does not set bit 11
	  of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
	  treat the access as a read, preventing a COW from occurring and
	  causing the faulting task to livelock.

1194 1195
config ARM_ERRATA_411920
	bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1196
	depends on CPU_V6 || CPU_V6K
1197 1198 1199 1200 1201 1202
	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.

1219 1220 1221
config ARM_ERRATA_458693
	bool "ARM errata: Processor deadlock when a false hazard is created"
	depends on CPU_V7
1222
	depends on !ARCH_MULTIPLATFORM
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	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
1236
	depends on !ARCH_MULTIPLATFORM
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	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.

1246 1247 1248
config ARM_ERRATA_742230
	bool "ARM errata: DMB operation may be faulty"
	depends on CPU_V7 && SMP
1249
	depends on !ARCH_MULTIPLATFORM
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	help
	  This option enables the workaround for the 742230 Cortex-A9
	  (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
	  between two write operations may not ensure the correct visibility
	  ordering of the two writes. This workaround sets a specific bit in
	  the diagnostic register of the Cortex-A9 which causes the DMB
	  instruction to behave as a DSB, ensuring the correct behaviour of
	  the two writes.

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config ARM_ERRATA_742231
	bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
	depends on CPU_V7 && SMP
1262
	depends on !ARCH_MULTIPLATFORM
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	help
	  This option enables the workaround for the 742231 Cortex-A9
	  (r2p0..r2p2) erratum. Under certain conditions, specific to the
	  Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
	  accessing some data located in the same cache line, may get corrupted
	  data due to bad handling of the address hazard when the line gets
	  replaced from one of the CPUs at the same time as another CPU is
	  accessing it. This workaround sets specific bits in the diagnostic
	  register of the Cortex-A9 which reduces the linefill issuing
	  capabilities of the processor.

1274
config PL310_ERRATA_588369
1275
	bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
1276
	depends on CACHE_L2X0
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	help
	   The PL310 L2 cache controller implements three types of Clean &
	   Invalidate maintenance operations: by Physical Address
	   (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
	   They are architecturally defined to behave as the execution of a
	   clean operation followed immediately by an invalidate operation,
	   both performing to the same memory location. This functionality
	   is not correctly implemented in PL310 as clean lines are not
1285
	   invalidated as a result of these operations.
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config ARM_ERRATA_720789
	bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1289
	depends on CPU_V7
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	help
	  This option enables the workaround for the 720789 Cortex-A9 (prior to
	  r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
	  broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
	  As a consequence of this erratum, some TLB entries which should be
	  invalidated are not, resulting in an incoherency in the system page
	  tables. The workaround changes the TLB flushing routines to invalidate
	  entries regardless of the ASID.
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config PL310_ERRATA_727915
1300
	bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
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	depends on CACHE_L2X0
	help
	  PL310 implements the Clean & Invalidate by Way L2 cache maintenance
	  operation (offset 0x7FC). This operation runs in background so that
	  PL310 can handle normal accesses while it is in progress. Under very
	  rare circumstances, due to this erratum, write data can be lost when
	  PL310 treats a cacheable write transaction during a Clean &
	  Invalidate by Way operation.

1310 1311 1312
config ARM_ERRATA_743622
	bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
	depends on CPU_V7
1313
	depends on !ARCH_MULTIPLATFORM
1314 1315
	help
	  This option enables the workaround for the 743622 Cortex-A9
1316
	  (r2p*) erratum. Under very rare conditions, a faulty
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	  optimisation in the Cortex-A9 Store Buffer may lead to data
	  corruption. This workaround sets a specific bit in the diagnostic
	  register of the Cortex-A9 which disables the Store Buffer
	  optimisation, preventing the defect from occurring. This has no
	  visible impact on the overall performance or power consumption of the
	  processor.

1324 1325
config ARM_ERRATA_751472
	bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1326
	depends on CPU_V7
1327
	depends on !ARCH_MULTIPLATFORM
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	help
	  This option enables the workaround for the 751472 Cortex-A9 (prior
	  to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
	  completion of a following broadcasted operation if the second
	  operation is received by a CPU before the ICIALLUIS has completed,
	  potentially leading to corrupted entries in the cache or TLB.

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config PL310_ERRATA_753970
	bool "PL310 errata: cache sync operation may be faulty"
1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349
	depends on CACHE_PL310
	help
	  This option enables the workaround for the 753970 PL310 (r3p0) erratum.

	  Under some condition the effect of cache sync operation on
	  the store buffer still remains when the operation completes.
	  This means that the store buffer is always asked to drain and
	  this prevents it from merging any further writes. The workaround
	  is to replace the normal offset of cache sync operation (0x730)
	  by another offset targeting an unmapped PL310 register 0x740.
	  This has the same effect as the cache sync operation: store buffer
	  drain and waiting for all buffers empty.

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config ARM_ERRATA_754322
	bool "ARM errata: possible faulty MMU translations following an ASID switch"
	depends on CPU_V7
	help
	  This option enables the workaround for the 754322 Cortex-A9 (r2p*,
	  r3p*) erratum. A speculative memory access may cause a page table walk
	  which starts prior to an ASID switch but completes afterwards. This
	  can populate the micro-TLB with a stale entry which may be hit with
	  the new ASID. This workaround places two dsb instructions in the mm
	  switching code so that no page table walks can cross the ASID switch.

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config ARM_ERRATA_754327
	bool "ARM errata: no automatic Store Buffer drain"
	depends on CPU_V7 && SMP
	help
	  This option enables the workaround for the 754327 Cortex-A9 (prior to
	  r2p0) erratum. The Store Buffer does not have any automatic draining
	  mechanism and therefore a livelock may occur if an external agent
	  continuously polls a memory location waiting to observe an update.
	  This workaround defines cpu_relax() as smp_mb(), preventing correctly
	  written polling loops from denying visibility of updates to memory.

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config ARM_ERRATA_364296
	bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
	depends on CPU_V6 && !SMP
	help
	  This options enables the workaround for the 364296 ARM1136
	  r0p2 erratum (possible cache data corruption with
	  hit-under-miss enabled). It sets the undocumented bit 31 in
	  the auxiliary control register and the FI bit in the control
	  register, thus disabling hit-under-miss without putting the
	  processor into full low interrupt latency mode. ARM11MPCore
	  is not affected.

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config ARM_ERRATA_764369
	bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
	depends on CPU_V7 && SMP
	help
	  This option enables the workaround for erratum 764369
	  affecting Cortex-A9 MPCore with two or more processors (all
	  current revisions). Under certain timing circumstances, a data
	  cache line maintenance operation by MVA targeting an Inner
	  Shareable memory region may fail to proceed up to either the
	  Point of Coherency or to the Point of Unification of the
	  system. This workaround adds a DSB instruction before the
	  relevant cache maintenance functions and sets a specific bit
	  in the diagnostic control register of the SCU.

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config PL310_ERRATA_769419
	bool "PL310 errata: no automatic Store Buffer drain"
	depends on CACHE_L2X0
	help
	  On revisions of the PL310 prior to r3p2, the Store Buffer does
	  not automatically drain. This can cause normal, non-cacheable
	  writes to be retained when the memory system is idle, leading
	  to suboptimal I/O performance for drivers using coherent DMA.
	  This option adds a write barrier to the cpu_idle loop so that,
	  on systems with an outer cache, the store buffer is drained
	  explicitly.

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config ARM_ERRATA_775420
       bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
       depends on CPU_V7
       help
	 This option enables the workaround for the 775420 Cortex-A9 (r2p2,
	 r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
	 operation aborts with MMU exception, it might cause the processor
	 to deadlock. This workaround puts DSB before executing ISB if
	 an abort may occur on cache maintenance.

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endmenu

source "arch/arm/common/Kconfig"

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
1441
	select ISA_DMA_API
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config ARCH_NO_VIRT_TO_BUS
	def_bool y
	depends on !ARCH_RPC && !ARCH_NETWINDER && !ARCH_SHARK

1447
# Select ISA DMA interface
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config ISA_DMA_API
	bool

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config PCI
1452
	bool "PCI support" if MIGHT_HAVE_PCI
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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_DOMAINS
	bool
	depends on PCI

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config PCI_NANOENGINE
	bool "BSE nanoEngine PCI support"
	depends on SA1100_NANOENGINE
	help
	  Enable PCI on the BSE nanoEngine board.

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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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config HAVE_SMP
	bool
	help
	  This option should be selected by machines which have an SMP-
	  capable CPU.

	  The only effect of this option is to make the SMP-related
	  options available to the user for configuration.

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config SMP
1502
	bool "Symmetric Multi-Processing"
1503
	depends on CPU_V6K || CPU_V7
1504
	depends on GENERIC_CLOCKEVENTS
1505
	depends on HAVE_SMP
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	depends on MMU
1507
	select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
1508
	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/x86/i386/IO-APIC.txt>,
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	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1522
	  <http://tldp.org/HOWTO/SMP-HOWTO.html>.
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	  If you don't know what to do here, say N.

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config SMP_ON_UP
	bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1528
	depends on SMP && !XIP_KERNEL
1529 1530 1531 1532 1533 1534 1535 1536 1537
	default y
	help
	  SMP kernels contain instructions which fail on non-SMP processors.
	  Enabling this option allows the kernel to modify itself to make
	  these instructions safe.  Disabling it allows about 1K of space
	  savings.

	  If you don't know what to do here, say Y.

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config ARM_CPU_TOPOLOGY
	bool "Support cpu topology definition"
	depends on SMP && CPU_V7
	default y
	help
	  Support ARM cpu topology definition. The MPIDR register defines
	  affinity between processors which is then used to describe the cpu
	  topology of an ARM System.

config SCHED_MC
	bool "Multi-core scheduler support"
	depends on ARM_CPU_TOPOLOGY
	help
	  Multi-core scheduler support improves the CPU scheduler's decision
	  making when dealing with multi-core CPU chips at a cost of slightly
	  increased overhead in some places. If unsure say N here.

config SCHED_SMT
	bool "SMT scheduler support"
	depends on ARM_CPU_TOPOLOGY
	help
	  Improves the CPU scheduler's decision making when dealing with
	  MultiThreading at a cost of slightly increased overhead in some
	  places. If unsure say N here.

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config HAVE_ARM_SCU
	bool
	help
	  This option enables support for the ARM system coherency unit

1568
config HAVE_ARM_ARCH_TIMER
1569 1570
	bool "Architected timer support"
	depends on CPU_V7
1571
	select ARM_ARCH_TIMER
1572 1573 1574
	help
	  This option enables support for the ARM architected timer

1575 1576 1577 1578 1579 1580
config HAVE_ARM_TWD
	bool
	depends on SMP
	help
	  This options enables support for the ARM timer and watchdog unit

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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"

1610
config HOTPLUG_CPU
1611 1612
	bool "Support for hot-pluggable CPUs"
	depends on SMP && HOTPLUG
1613 1614 1615 1616
	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 ARM_PSCI
	bool "Support for the ARM Power State Coordination Interface (PSCI)"
	depends on CPU_V7
	help
	  Say Y here if you want Linux to communicate with system firmware
	  implementing the PSCI specification for CPU-centric power
	  management operations described in ARM document number ARM DEN
	  0022A ("Power State Coordination Interface System Software on
	  ARM processors").

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config LOCAL_TIMERS
	bool "Use local timer interrupts"
1629
	depends on SMP
1630
	default y
1631
	select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
1632 1633 1634 1635 1636 1637
	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 ARCH_NR_GPIO
	int
1640
	default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
1641
	default 355 if ARCH_U8500
1642
	default 264 if MACH_H4700
1643
	default 512 if SOC_OMAP5
1644
	default 288 if ARCH_VT8500 || ARCH_SUNXI
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	default 0
	help
	  Maximum number of GPIOs in the system.

	  If unsure, leave the default value.

1651
source kernel/Kconfig.preempt
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config HZ
	int
1655
	default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
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		ARCH_S5PV210 || ARCH_EXYNOS4
1657
	default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1658
	default AT91_TIMER_HZ if ARCH_AT91
1659
	default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1660 1661
	default 100

1662 1663 1664
config SCHED_HRTICK
	def_bool HIGH_RES_TIMERS

1665
config THUMB2_KERNEL
1666 1667
	bool "Compile the kernel in Thumb-2 mode"
	depends on CPU_V7 && !CPU_V6 && !CPU_V6K
1668 1669
	select AEABI
	select ARM_ASM_UNIFIED
1670
	select ARM_UNWIND
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	help
	  By enabling this option, the kernel will be compiled in
	  Thumb-2 mode. A compiler/assembler that understand the unified
	  ARM-Thumb syntax is needed.

	  If unsure, say N.

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config THUMB2_AVOID_R_ARM_THM_JUMP11
	bool "Work around buggy Thumb-2 short branch relocations in gas"
	depends on THUMB2_KERNEL && MODULES
	default y
	help
	  Various binutils versions can resolve Thumb-2 branches to
	  locally-defined, preemptible global symbols as short-range "b.n"
	  branch instructions.

	  This is a problem, because there's no guarantee the final
	  destination of the symbol, or any candidate locations for a
	  trampoline, are within range of the branch.  For this reason, the
	  kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
	  relocation in modules at all, and it makes little sense to add
	  support.

	  The symptom is that the kernel fails with an "unsupported
	  relocation" error when loading some modules.

	  Until fixed tools are available, passing
	  -fno-optimize-sibling-calls to gcc should prevent gcc generating
	  code which hits this problem, at the cost of a bit of extra runtime
	  stack usage in some cases.

	  The problem is described in more detail at:
	      https://bugs.launchpad.net/binutils-linaro/+bug/725126

	  Only Thumb-2 kernels are affected.

	  Unless you are sure your tools don't have this problem, say Y.

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config ARM_ASM_UNIFIED
	bool

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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.

1727
config OABI_COMPAT
1728
	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1729
	depends on AEABI && !THUMB2_KERNEL
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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.

1744
config ARCH_HAS_HOLES_MEMORYMODEL
1745 1746
	bool

1747 1748 1749
config ARCH_SPARSEMEM_ENABLE
	bool

1750 1751 1752
config ARCH_SPARSEMEM_DEFAULT
	def_bool ARCH_SPARSEMEM_ENABLE

1753
config ARCH_SELECT_MEMORY_MODEL
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	def_bool ARCH_SPARSEMEM_ENABLE
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1755

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config HAVE_ARCH_PFN_VALID
	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM

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config HIGHMEM
1760 1761
	bool "High Memory Support"
	depends on MMU
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	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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config HIGHPTE
	bool "Allocate 2nd-level pagetables from highmem"
	depends on HIGHMEM

1780 1781
config HW_PERF_EVENTS
	bool "Enable hardware performance counter support for perf events"
1782
	depends on PERF_EVENTS
1783 1784 1785 1786 1787
	default y
	help
	  Enable hardware performance counter support for perf events. If
	  disabled, perf events will use software events only.

1788 1789
source "mm/Kconfig"

1790 1791 1792
config FORCE_MAX_ZONEORDER
	int "Maximum zone order" if ARCH_SHMOBILE
	range 11 64 if ARCH_SHMOBILE
1793
	default "12" if SOC_AM33XX
1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806
	default "9" if SA1111
	default "11"
	help
	  The kernel memory allocator divides physically contiguous memory
	  blocks into "zones", where each zone is a power of two number of
	  pages.  This option selects the largest power of two that the kernel
	  keeps in the memory allocator.  If you need to allocate very large
	  blocks of physically contiguous memory, then you may need to
	  increase this value.

	  This config option is actually maximum order plus one. For example,
	  a value of 11 means that the largest free memory block is 2^10 pages.

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config ALIGNMENT_TRAP
	bool
1809
	depends on CPU_CP15_MMU
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	default y if !ARCH_EBSA110
1811
	select HAVE_PROC_CPU if PROC_FS
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	help
1813
	  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.

1821
config UACCESS_WITH_MEMCPY
1822 1823
	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
	depends on MMU
1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836
	default y if CPU_FEROCEON
	help
	  Implement faster copy_to_user and clear_user methods for CPU
	  cores where a 8-word STM instruction give significantly higher
	  memory write throughput than a sequence of individual 32bit stores.

	  A possible side effect is a slight increase in scheduling latency
	  between threads sharing the same address space if they invoke
	  such copy operations with large buffers.

	  However, if the CPU data cache is using a write-allocate mode,
	  this option is unlikely to provide any performance gain.

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config SECCOMP
	bool
	prompt "Enable seccomp to safely compute untrusted bytecode"
	---help---
	  This kernel feature is useful for number crunching applications
	  that may need to compute untrusted bytecode during their
	  execution. By using pipes or other transports made available to
	  the process as file descriptors supporting the read/write
	  syscalls, it's possible to isolate those applications in
	  their own address space using seccomp. Once seccomp is
	  enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
	  and the task is only allowed to execute a few safe syscalls
	  defined by each seccomp mode.

1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862
config CC_STACKPROTECTOR
	bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
	help
	  This option turns on the -fstack-protector GCC feature. This
	  feature puts, at the beginning of functions, a canary value on
	  the stack just before the return address, and validates
	  the value just before actually returning.  Stack based buffer
	  overflows (that need to overwrite this return address) now also
	  overwrite the canary, which gets detected and the attack is then
	  neutralized via a kernel panic.
	  This feature requires gcc version 4.2 or above.

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config XEN_DOM0
	def_bool y
	depends on XEN

config XEN
	bool "Xen guest support on ARM (EXPERIMENTAL)"
1869
	depends on ARM && OF
1870
	depends on CPU_V7 && !CPU_V6
1871 1872 1873
	help
	  Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.

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endmenu

menu "Boot options"

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config USE_OF
	bool "Flattened Device Tree support"
1880
	select IRQ_DOMAIN
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	select OF
	select OF_EARLY_FLATTREE
	help
	  Include support for flattened device tree machine descriptions.

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config ATAGS
	bool "Support for the traditional ATAGS boot data passing" if USE_OF
	default y
	help
	  This is the traditional way of passing data to the kernel at boot
	  time. If you are solely relying on the flattened device tree (or
	  the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
	  to remove ATAGS support from your kernel binary.  If unsure,
	  leave this to y.

config DEPRECATED_PARAM_STRUCT
	bool "Provide old way to pass kernel parameters"
	depends on ATAGS
	help
	  This was deprecated in 2001 and announced to live on for 5 years.
	  Some old boot loaders still use this way.

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# 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
1920 1921 1922 1923 1924 1925
	  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.

1936 1937
choice
	prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1938
	depends on ZBOOT_ROM && ARCH_SH7372
1939 1940 1941
	default ZBOOT_ROM_NONE
	help
	  Include experimental SD/MMC loading code in the ROM-able zImage.
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	  With this enabled it is possible to write the ROM-able zImage
1943 1944
	  kernel image to an MMC or SD card and boot the kernel straight
	  from the reset vector. At reset the processor Mask ROM will load
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	  the first part of the ROM-able zImage which in turn loads the
1946 1947 1948 1949 1950 1951 1952
	  rest the kernel image to RAM.

config ZBOOT_ROM_NONE
	bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
	help
	  Do not load image from SD or MMC

1953 1954 1955
config ZBOOT_ROM_MMCIF
	bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
	help
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	  Load image from MMCIF hardware block.

config ZBOOT_ROM_SH_MOBILE_SDHI
	bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
	help
	  Load image from SDHI hardware block

endchoice
1964

1965 1966
config ARM_APPENDED_DTB
	bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
1967
	depends on OF && !ZBOOT_ROM
1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984
	help
	  With this option, the boot code will look for a device tree binary
	  (DTB) appended to zImage
	  (e.g. cat zImage <filename>.dtb > zImage_w_dtb).

	  This is meant as a backward compatibility convenience for those
	  systems with a bootloader that can't be upgraded to accommodate
	  the documented boot protocol using a device tree.

	  Beware that there is very little in terms of protection against
	  this option being confused by leftover garbage in memory that might
	  look like a DTB header after a reboot if no actual DTB is appended
	  to zImage.  Do not leave this option active in a production kernel
	  if you don't intend to always append a DTB.  Proper passing of the
	  location into r2 of a bootloader provided DTB is always preferable
	  to this option.

1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996
config ARM_ATAG_DTB_COMPAT
	bool "Supplement the appended DTB with traditional ATAG information"
	depends on ARM_APPENDED_DTB
	help
	  Some old bootloaders can't be updated to a DTB capable one, yet
	  they provide ATAGs with memory configuration, the ramdisk address,
	  the kernel cmdline string, etc.  Such information is dynamically
	  provided by the bootloader and can't always be stored in a static
	  DTB.  To allow a device tree enabled kernel to be used with such
	  bootloaders, this option allows zImage to extract the information
	  from the ATAG list and store it at run time into the appended DTB.

1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015
choice
	prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
	default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER

config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
	bool "Use bootloader kernel arguments if available"
	help
	  Uses the command-line options passed by the boot loader instead of
	  the device tree bootargs property. If the boot loader doesn't provide
	  any, the device tree bootargs property will be used.

config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
	bool "Extend with bootloader kernel arguments"
	help
	  The command-line arguments provided by the boot loader will be
	  appended to the the device tree bootargs property.

endchoice

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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).

2026 2027 2028
choice
	prompt "Kernel command line type" if CMDLINE != ""
	default CMDLINE_FROM_BOOTLOADER
2029
	depends on ATAGS
2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043

config CMDLINE_FROM_BOOTLOADER
	bool "Use bootloader kernel arguments if available"
	help
	  Uses the command-line options passed by the boot loader. If
	  the boot loader doesn't provide any, the default kernel command
	  string provided in CMDLINE will be used.

config CMDLINE_EXTEND
	bool "Extend bootloader kernel arguments"
	help
	  The command-line arguments provided by the boot loader will be
	  appended to the default kernel command string.

2044 2045 2046 2047 2048 2049 2050
config CMDLINE_FORCE
	bool "Always use the default kernel command string"
	help
	  Always use the default kernel command string, even if the boot
	  loader passes other arguments to the kernel.
	  This is useful if you cannot or don't want to change the
	  command-line options your boot loader passes to the kernel.
2051
endchoice
2052

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config XIP_KERNEL
	bool "Kernel Execute-In-Place from ROM"
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	depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
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	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)"
2085
	depends on (!SMP || HOTPLUG_CPU)
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	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.

2097 2098
config ATAGS_PROC
	bool "Export atags in procfs"
2099
	depends on ATAGS && KEXEC
2100
	default y
2101 2102 2103 2104
	help
	  Should the atags used to boot the kernel be exported in an "atags"
	  file in procfs. Useful with kexec.

2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116
config CRASH_DUMP
	bool "Build kdump crash kernel (EXPERIMENTAL)"
	help
	  Generate crash dump after being started by kexec. This should
	  be normally only set in special crash dump kernels which are
	  loaded in the main kernel with kexec-tools into a specially
	  reserved region and then later executed after a crash by
	  kdump/kexec. The crash dump kernel must be compiled to a
	  memory address not used by the main kernel

	  For more details see Documentation/kdump/kdump.txt

2117 2118 2119 2120 2121 2122 2123 2124 2125 2126
config AUTO_ZRELADDR
	bool "Auto calculation of the decompressed kernel image address"
	depends on !ZBOOT_ROM && !ARCH_U300
	help
	  ZRELADDR is the physical address where the decompressed kernel
	  image will be placed. If AUTO_ZRELADDR is selected, the address
	  will be determined at run-time by masking the current IP with
	  0xf8000000. This assumes the zImage being placed in the first 128MB
	  from start of memory.

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endmenu

2129
menu "CPU Power Management"
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2130

2131
if ARCH_HAS_CPUFREQ
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2132 2133 2134

source "drivers/cpufreq/Kconfig"

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config CPU_FREQ_IMX
	tristate "CPUfreq driver for i.MX CPUs"
	depends on ARCH_MXC && CPU_FREQ
2138
	select CPU_FREQ_TABLE
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	help
	  This enables the CPUfreq driver for i.MX CPUs.

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config CPU_FREQ_SA1100
	bool

config CPU_FREQ_SA1110
	bool

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
2164
	select CPU_FREQ_TABLE
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config CPU_FREQ_S3C
	bool
	help
	  Internal configuration node for common cpufreq on Samsung SoC

config CPU_FREQ_S3C24XX
2172
	bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
2173
	depends on ARCH_S3C24XX && CPU_FREQ
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	select CPU_FREQ_S3C
	help
	  This enables the CPUfreq driver for the Samsung S3C24XX family
	  of CPUs.

	  For details, take a look at <file:Documentation/cpu-freq>.

	  If in doubt, say N.

config CPU_FREQ_S3C24XX_PLL
2184
	bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
2185
	depends on CPU_FREQ_S3C24XX
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	help
	  Compile in support for changing the PLL frequency from the
	  S3C24XX series CPUfreq driver. The PLL takes time to settle
	  after a frequency change, so by default it is not enabled.

	  This also means that the PLL tables for the selected CPU(s) will
	  be built which may increase the size of the kernel image.

config CPU_FREQ_S3C24XX_DEBUG
	bool "Debug CPUfreq Samsung driver core"
	depends on CPU_FREQ_S3C24XX
	help
	  Enable s3c_freq_dbg for the Samsung S3C CPUfreq core

config CPU_FREQ_S3C24XX_IODEBUG
	bool "Debug CPUfreq Samsung driver IO timing"
	depends on CPU_FREQ_S3C24XX
	help
	  Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core

2206 2207 2208 2209 2210 2211
config CPU_FREQ_S3C24XX_DEBUGFS
	bool "Export debugfs for CPUFreq"
	depends on CPU_FREQ_S3C24XX && DEBUG_FS
	help
	  Export status information via debugfs.

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endif

2214 2215 2216 2217
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"
2224
	depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
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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"
2236
	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)"
2248
	depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
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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"
2262
	depends on CPU_V6 || CPU_V6K || 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

2277 2278 2279 2280 2281 2282 2283
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"
2292
	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
2307
	depends on !ARCH_S5PC100
2308
	depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
2309
		CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
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	def_bool y

2312 2313 2314
config ARM_CPU_SUSPEND
	def_bool PM_SLEEP

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endmenu

2317 2318
source "net/Kconfig"

2319
source "drivers/Kconfig"
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source "fs/Kconfig"

source "arch/arm/Kconfig.debug"

source "security/Kconfig"

source "crypto/Kconfig"

source "lib/Kconfig"
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source "arch/arm/kvm/Kconfig"