Kconfig 64.1 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
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	select GENERIC_IDLE_POLL_SETUP
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	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_IRQ_TIME_ACCOUNTING
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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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	select HAVE_CONTEXT_TRACKING
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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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if ARM_DMA_USE_IOMMU

config ARM_DMA_IOMMU_ALIGNMENT
	int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
	range 4 9
	default 8
	help
	  DMA mapping framework by default aligns all buffers to the smallest
	  PAGE_SIZE order which is greater than or equal to the requested buffer
	  size. This works well for buffers up to a few hundreds kilobytes, but
	  for larger buffers it just a waste of address space. Drivers which has
	  relatively small addressing window (like 64Mib) might run out of
	  virtual space with just a few allocations.

	  With this parameter you can specify the maximum PAGE_SIZE order for
	  DMA IOMMU buffers. Larger buffers will be aligned only to this
	  specified order. The order is expressed as a power of two multiplied
	  by the PAGE_SIZE.

endif

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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 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_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 NEED_MACH_GPIO_H
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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_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_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

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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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	select USB_EHCI_BIG_ENDIAN_MMIO
	select USB_EHCI_BIG_ENDIAN_DESC
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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 CPU_PJ4
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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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	select MVEBU_MBUS
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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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	select MVEBU_MBUS
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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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	select MVEBU_MBUS
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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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	select MVEBU_MBUS
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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

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config ARCH_PXA
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	bool "PXA2xx/PXA3xx-based"
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	depends on MMU
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	select ARCH_HAS_CPUFREQ
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	select ARCH_MTD_XIP
	select ARCH_REQUIRE_GPIOLIB
	select ARM_CPU_SUSPEND if PM
	select AUTO_ZRELADDR
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	select CLKDEV_LOOKUP
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	select CLKSRC_MMIO
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	select GENERIC_CLOCKEVENTS
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	select GPIO_PXA
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	select HAVE_IDE
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	select MULTI_IRQ_HANDLER
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	select NEED_MACH_GPIO_H
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	select PLAT_PXA
	select SPARSE_IRQ
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	help
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	  Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
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config ARCH_MSM
	bool "Qualcomm MSM"
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	select ARCH_REQUIRE_GPIOLIB
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	select CLKDEV_LOOKUP
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	select GENERIC_CLOCKEVENTS
	select HAVE_CLK
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	help
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	  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).
634

635
config ARCH_SHMOBILE
636
	bool "Renesas SH-Mobile / R-Mobile"
P
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637
	select CLKDEV_LOOKUP
638
	select GENERIC_CLOCKEVENTS
639 640
	select HAVE_ARM_SCU if SMP
	select HAVE_ARM_TWD if LOCAL_TIMERS
641
	select HAVE_CLK
642
	select HAVE_MACH_CLKDEV
643
	select HAVE_SMP
644
	select MIGHT_HAVE_CACHE_L2X0
645
	select MULTI_IRQ_HANDLER
646
	select NEED_MACH_MEMORY_H
647
	select NO_IOPORT
648
	select PINCTRL if ARCH_WANT_OPTIONAL_GPIOLIB
649 650
	select PM_GENERIC_DOMAINS if PM
	select SPARSE_IRQ
651
	help
652
	  Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
653

L
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654 655 656
config ARCH_RPC
	bool "RiscPC"
	select ARCH_ACORN
657
	select ARCH_MAY_HAVE_PC_FDC
658
	select ARCH_SPARSEMEM_ENABLE
659
	select ARCH_USES_GETTIMEOFFSET
660
	select FIQ
661
	select HAVE_IDE
662 663
	select HAVE_PATA_PLATFORM
	select ISA_DMA_API
664
	select NEED_MACH_IO_H
665
	select NEED_MACH_MEMORY_H
666
	select NO_IOPORT
667
	select VIRT_TO_BUS
L
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668 669 670 671 672 673
	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"
674
	select ARCH_HAS_CPUFREQ
675 676 677 678 679
	select ARCH_MTD_XIP
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_SPARSEMEM_ENABLE
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
R
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680
	select CPU_FREQ
681
	select CPU_SA1100
682
	select GENERIC_CLOCKEVENTS
683
	select HAVE_IDE
684
	select ISA
685
	select NEED_MACH_GPIO_H
686
	select NEED_MACH_MEMORY_H
687
	select SPARSE_IRQ
688 689
	help
	  Support for StrongARM 11x0 based boards.
L
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690

691 692
config ARCH_S3C24XX
	bool "Samsung S3C24XX SoCs"
B
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693
	select ARCH_HAS_CPUFREQ
694
	select ARCH_REQUIRE_GPIOLIB
695
	select CLKDEV_LOOKUP
696 697
	select CLKSRC_MMIO
	select GENERIC_CLOCKEVENTS
698
	select HAVE_CLK
699
	select HAVE_S3C2410_I2C if I2C
700
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
701
	select HAVE_S3C_RTC if RTC_CLASS
702
	select MULTI_IRQ_HANDLER
703
	select NEED_MACH_GPIO_H
704
	select NEED_MACH_IO_H
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705
	help
706 707 708 709
	  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).
710

B
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711 712
config ARCH_S3C64XX
	bool "Samsung S3C64XX"
713 714
	select ARCH_HAS_CPUFREQ
	select ARCH_REQUIRE_GPIOLIB
715
	select ARM_VIC
716
	select CLKDEV_LOOKUP
717
	select CLKSRC_MMIO
718
	select CPU_V6
719
	select GENERIC_CLOCKEVENTS
B
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720
	select HAVE_CLK
721 722
	select HAVE_S3C2410_I2C if I2C
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
M
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723
	select HAVE_TCM
724
	select NEED_MACH_GPIO_H
725
	select NO_IOPORT
726 727 728
	select PLAT_SAMSUNG
	select S3C_DEV_NAND
	select S3C_GPIO_TRACK
729
	select SAMSUNG_CLKSRC
730
	select SAMSUNG_GPIOLIB_4BIT
731 732
	select SAMSUNG_IRQ_VIC_TIMER
	select USB_ARCH_HAS_OHCI
B
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733 734 735
	help
	  Samsung S3C64XX series based systems

736 737
config ARCH_S5P64X0
	bool "Samsung S5P6440 S5P6450"
738
	select CLKDEV_LOOKUP
739
	select CLKSRC_MMIO
740
	select CPU_V6
741
	select GENERIC_CLOCKEVENTS
742
	select HAVE_CLK
743
	select HAVE_S3C2410_I2C if I2C
744
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
745
	select HAVE_S3C_RTC if RTC_CLASS
746
	select NEED_MACH_GPIO_H
747
	help
748 749
	  Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
	  SMDK6450.
750

751 752
config ARCH_S5PC100
	bool "Samsung S5PC100"
753
	select ARCH_REQUIRE_GPIOLIB
754
	select CLKDEV_LOOKUP
755
	select CLKSRC_MMIO
756
	select CPU_V7
757
	select GENERIC_CLOCKEVENTS
758
	select HAVE_CLK
759
	select HAVE_S3C2410_I2C if I2C
760
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
761
	select HAVE_S3C_RTC if RTC_CLASS
762
	select NEED_MACH_GPIO_H
763
	help
764
	  Samsung S5PC100 series based systems
765

766 767
config ARCH_S5PV210
	bool "Samsung S5PV210/S5PC110"
768
	select ARCH_HAS_CPUFREQ
769
	select ARCH_HAS_HOLES_MEMORYMODEL
770
	select ARCH_SPARSEMEM_ENABLE
771
	select CLKDEV_LOOKUP
772
	select CLKSRC_MMIO
773
	select CPU_V7
774
	select GENERIC_CLOCKEVENTS
775
	select HAVE_CLK
776
	select HAVE_S3C2410_I2C if I2C
777
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
778
	select HAVE_S3C_RTC if RTC_CLASS
779
	select NEED_MACH_GPIO_H
780
	select NEED_MACH_MEMORY_H
781 782 783
	help
	  Samsung S5PV210/S5PC110 series based systems

784
config ARCH_EXYNOS
785
	bool "Samsung EXYNOS"
786
	select ARCH_HAS_CPUFREQ
787
	select ARCH_HAS_HOLES_MEMORYMODEL
788
	select ARCH_SPARSEMEM_ENABLE
789
	select CLKDEV_LOOKUP
790
	select COMMON_CLK
791
	select CPU_V7
792
	select GENERIC_CLOCKEVENTS
793
	select HAVE_CLK
794
	select HAVE_S3C2410_I2C if I2C
795
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
796
	select HAVE_S3C_RTC if RTC_CLASS
797
	select NEED_MACH_GPIO_H
798
	select NEED_MACH_MEMORY_H
799
	help
800
	  Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
801

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802 803
config ARCH_SHARK
	bool "Shark"
804
	select ARCH_USES_GETTIMEOFFSET
805
	select CPU_SA110
806 807
	select ISA
	select ISA_DMA
808
	select NEED_MACH_MEMORY_H
809
	select PCI
810
	select VIRT_TO_BUS
811
	select ZONE_DMA
812 813 814
	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
815

816 817 818
config ARCH_U300
	bool "ST-Ericsson U300 Series"
	depends on MMU
819
	select ARCH_REQUIRE_GPIOLIB
820
	select ARM_AMBA
821
	select ARM_PATCH_PHYS_VIRT
822
	select ARM_VIC
823
	select CLKDEV_LOOKUP
824
	select CLKSRC_MMIO
825
	select COMMON_CLK
826 827 828
	select CPU_ARM926T
	select GENERIC_CLOCKEVENTS
	select HAVE_TCM
829
	select SPARSE_IRQ
830 831 832
	help
	  Support for ST-Ericsson U300 series mobile platforms.

833 834
config ARCH_DAVINCI
	bool "TI DaVinci"
835
	select ARCH_HAS_HOLES_MEMORYMODEL
836
	select ARCH_REQUIRE_GPIOLIB
837
	select CLKDEV_LOOKUP
D
David Brownell 已提交
838
	select GENERIC_ALLOCATOR
839
	select GENERIC_CLOCKEVENTS
R
Russell King 已提交
840
	select GENERIC_IRQ_CHIP
841
	select HAVE_IDE
842
	select NEED_MACH_GPIO_H
843
	select USE_OF
844
	select ZONE_DMA
845 846 847
	help
	  Support for TI's DaVinci platform.

848 849
config ARCH_OMAP1
	bool "TI OMAP1"
A
Arnd Bergmann 已提交
850
	depends on MMU
851
	select ARCH_HAS_CPUFREQ
852
	select ARCH_HAS_HOLES_MEMORYMODEL
853
	select ARCH_OMAP
854
	select ARCH_REQUIRE_GPIOLIB
855
	select CLKDEV_LOOKUP
856
	select CLKSRC_MMIO
857
	select GENERIC_CLOCKEVENTS
858
	select GENERIC_IRQ_CHIP
859
	select HAVE_CLK
860 861 862 863
	select HAVE_IDE
	select IRQ_DOMAIN
	select NEED_MACH_IO_H if PCCARD
	select NEED_MACH_MEMORY_H
864
	help
865
	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
866

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867 868
endchoice

R
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869 870 871 872 873 874 875 876
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
877
	select ARCH_MULTI_V4_V5
R
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878 879 880 881

config ARCH_MULTI_V4T
	bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
	depends on !ARCH_MULTI_V6_V7
882
	select ARCH_MULTI_V4_V5
R
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883 884 885 886

config ARCH_MULTI_V5
	bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
	depends on !ARCH_MULTI_V6_V7
887
	select ARCH_MULTI_V4_V5
R
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888 889 890 891 892

config ARCH_MULTI_V4_V5
	bool

config ARCH_MULTI_V6
893
	bool "ARMv6 based platforms (ARM11)"
R
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894
	select ARCH_MULTI_V6_V7
895
	select CPU_V6
R
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896 897

config ARCH_MULTI_V7
898
	bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
R
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899 900
	default y
	select ARCH_MULTI_V6_V7
901
	select CPU_V7
R
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902 903 904 905 906 907 908 909 910 911

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

912 913 914 915 916
#
# 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.
#
917 918
source "arch/arm/mach-mvebu/Kconfig"

919 920
source "arch/arm/mach-at91/Kconfig"

921 922
source "arch/arm/mach-bcm/Kconfig"

923 924
source "arch/arm/mach-bcm2835/Kconfig"

L
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925 926
source "arch/arm/mach-clps711x/Kconfig"

927 928
source "arch/arm/mach-cns3xxx/Kconfig"

929 930 931 932
source "arch/arm/mach-davinci/Kconfig"

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

933 934
source "arch/arm/mach-ep93xx/Kconfig"

L
Linus Torvalds 已提交
935 936
source "arch/arm/mach-footbridge/Kconfig"

937 938
source "arch/arm/mach-gemini/Kconfig"

R
Rob Herring 已提交
939 940
source "arch/arm/mach-highbank/Kconfig"

L
Linus Torvalds 已提交
941 942
source "arch/arm/mach-integrator/Kconfig"

943 944 945
source "arch/arm/mach-iop32x/Kconfig"

source "arch/arm/mach-iop33x/Kconfig"
L
Linus Torvalds 已提交
946

947 948
source "arch/arm/mach-iop13xx/Kconfig"

L
Linus Torvalds 已提交
949 950
source "arch/arm/mach-ixp4xx/Kconfig"

951 952 953 954 955 956
source "arch/arm/mach-kirkwood/Kconfig"

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

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

957 958
source "arch/arm/mach-mv78xx0/Kconfig"

S
Shawn Guo 已提交
959
source "arch/arm/mach-imx/Kconfig"
L
Linus Torvalds 已提交
960

961 962
source "arch/arm/mach-mxs/Kconfig"

963
source "arch/arm/mach-netx/Kconfig"
964

965 966
source "arch/arm/mach-nomadik/Kconfig"

967 968 969
source "arch/arm/plat-omap/Kconfig"

source "arch/arm/mach-omap1/Kconfig"
L
Linus Torvalds 已提交
970

971 972
source "arch/arm/mach-omap2/Kconfig"

973
source "arch/arm/mach-orion5x/Kconfig"
974

R
Rob Herring 已提交
975 976
source "arch/arm/mach-picoxcell/Kconfig"

977 978
source "arch/arm/mach-pxa/Kconfig"
source "arch/arm/plat-pxa/Kconfig"
979

980 981 982 983 984
source "arch/arm/mach-mmp/Kconfig"

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

source "arch/arm/mach-sa1100/Kconfig"
985

986
source "arch/arm/plat-samsung/Kconfig"
987

R
Rob Herring 已提交
988 989
source "arch/arm/mach-socfpga/Kconfig"

990
source "arch/arm/mach-spear/Kconfig"
991

992
source "arch/arm/mach-s3c24xx/Kconfig"
L
Linus Torvalds 已提交
993

B
Ben Dooks 已提交
994
if ARCH_S3C64XX
995
source "arch/arm/mach-s3c64xx/Kconfig"
B
Ben Dooks 已提交
996 997
endif

998
source "arch/arm/mach-s5p64x0/Kconfig"
999

1000 1001
source "arch/arm/mach-s5pc100/Kconfig"

1002 1003
source "arch/arm/mach-s5pv210/Kconfig"

1004
source "arch/arm/mach-exynos/Kconfig"
1005

1006
source "arch/arm/mach-shmobile/Kconfig"
1007

1008 1009
source "arch/arm/mach-sunxi/Kconfig"

1010 1011
source "arch/arm/mach-prima2/Kconfig"

1012 1013
source "arch/arm/mach-tegra/Kconfig"

1014
source "arch/arm/mach-u300/Kconfig"
L
Linus Torvalds 已提交
1015

1016
source "arch/arm/mach-ux500/Kconfig"
L
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1017 1018 1019

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

1020
source "arch/arm/mach-vexpress/Kconfig"
1021
source "arch/arm/plat-versatile/Kconfig"
1022

1023 1024
source "arch/arm/mach-virt/Kconfig"

1025 1026
source "arch/arm/mach-vt8500/Kconfig"

1027 1028
source "arch/arm/mach-w90x900/Kconfig"

1029 1030
source "arch/arm/mach-zynq/Kconfig"

L
Linus Torvalds 已提交
1031 1032 1033 1034
# Definitions to make life easier
config ARCH_ACORN
	bool

1035 1036
config PLAT_IOP
	bool
M
Mikael Pettersson 已提交
1037
	select GENERIC_CLOCKEVENTS
1038

L
Lennert Buytenhek 已提交
1039 1040
config PLAT_ORION
	bool
1041
	select CLKSRC_MMIO
1042
	select COMMON_CLK
R
Russell King 已提交
1043
	select GENERIC_IRQ_CHIP
1044
	select IRQ_DOMAIN
L
Lennert Buytenhek 已提交
1045

1046 1047 1048 1049
config PLAT_ORION_LEGACY
	bool
	select PLAT_ORION

1050 1051 1052
config PLAT_PXA
	bool

1053 1054 1055
config PLAT_VERSATILE
	bool

1056 1057
config ARM_TIMER_SP804
	bool
1058
	select CLKSRC_MMIO
1059
	select CLKSRC_OF if OF
1060

L
Linus Torvalds 已提交
1061 1062
source arch/arm/mm/Kconfig

1063 1064 1065 1066 1067
config ARM_NR_BANKS
	int
	default 16 if ARCH_EP93XX
	default 8

1068
config IWMMXT
1069
	bool "Enable iWMMXt support" if !CPU_PJ4
1070
	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
1071
	default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4
1072 1073 1074 1075
	help
	  Enable support for iWMMXt context switching at run time if
	  running on a CPU that supports it.

L
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1076 1077
config XSCALE_PMU
	bool
1078
	depends on CPU_XSCALE
L
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1079 1080
	default y

1081 1082 1083 1084 1085
config MULTI_IRQ_HANDLER
	bool
	help
	  Allow each machine to specify it's own IRQ handler at run time.

1086 1087 1088 1089
if !MMU
source "arch/arm/Kconfig-nommu"
endif

1090 1091 1092 1093 1094 1095 1096 1097 1098
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.

1099 1100
config ARM_ERRATA_411920
	bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1101
	depends on CPU_V6 || CPU_V6K
1102 1103 1104 1105 1106 1107
	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.

1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123
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.

1124 1125 1126
config ARM_ERRATA_458693
	bool "ARM errata: Processor deadlock when a false hazard is created"
	depends on CPU_V7
1127
	depends on !ARCH_MULTIPLATFORM
1128 1129 1130 1131 1132 1133 1134 1135 1136 1137
	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.

1138 1139 1140
config ARM_ERRATA_460075
	bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
	depends on CPU_V7
1141
	depends on !ARCH_MULTIPLATFORM
1142 1143 1144 1145 1146 1147 1148 1149 1150
	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.

1151 1152 1153
config ARM_ERRATA_742230
	bool "ARM errata: DMB operation may be faulty"
	depends on CPU_V7 && SMP
1154
	depends on !ARCH_MULTIPLATFORM
1155 1156 1157 1158 1159 1160 1161 1162 1163
	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.

1164 1165 1166
config ARM_ERRATA_742231
	bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
	depends on CPU_V7 && SMP
1167
	depends on !ARCH_MULTIPLATFORM
1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178
	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.

1179
config PL310_ERRATA_588369
1180
	bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
1181
	depends on CACHE_L2X0
1182 1183 1184 1185 1186 1187 1188 1189
	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
1190
	   invalidated as a result of these operations.
1191 1192 1193

config ARM_ERRATA_720789
	bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1194
	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.
1203

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config PL310_ERRATA_727915
1205
	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.

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config ARM_ERRATA_743622
	bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
	depends on CPU_V7
1218
	depends on !ARCH_MULTIPLATFORM
1219 1220
	help
	  This option enables the workaround for the 743622 Cortex-A9
1221
	  (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.

1229 1230
config ARM_ERRATA_751472
	bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1231
	depends on CPU_V7
1232
	depends on !ARCH_MULTIPLATFORM
1233 1234 1235 1236 1237 1238 1239
	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"
1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254
	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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config ARM_ERRATA_798181
	bool "ARM errata: TLBI/DSB failure on Cortex-A15"
	depends on CPU_V7 && SMP
	help
	  On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
	  adequately shooting down all use of the old entries. This
	  option enables the Linux kernel workaround for this erratum
	  which sends an IPI to the CPUs that are running the same ASID
	  as the one being invalidated.

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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.

1353
# Select ISA DMA controller support
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config ISA_DMA
	bool
1356
	select ISA_DMA_API
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1358
# Select ISA DMA interface
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config ISA_DMA_API
	bool

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config PCI
1363
	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

1374 1375 1376 1377 1378 1379
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"

1403 1404 1405 1406 1407 1408 1409 1410 1411
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
1413
	bool "Symmetric Multi-Processing"
1414
	depends on CPU_V6K || CPU_V7
1415
	depends on GENERIC_CLOCKEVENTS
1416
	depends on HAVE_SMP
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	depends on MMU
1418
	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
1432
	  <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)"
1438
	depends on SMP && !XIP_KERNEL
1439 1440 1441 1442 1443 1444 1445 1446 1447
	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

1478
config HAVE_ARM_ARCH_TIMER
1479 1480
	bool "Architected timer support"
	depends on CPU_V7
1481
	select ARM_ARCH_TIMER
1482 1483 1484
	help
	  This option enables support for the ARM architected timer

1485 1486 1487
config HAVE_ARM_TWD
	bool
	depends on SMP
1488
	select CLKSRC_OF if OF
1489 1490 1491
	help
	  This options enables support for the ARM timer and watchdog unit

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config MCPM
	bool "Multi-Cluster Power Management"
	depends on CPU_V7 && SMP
	help
	  This option provides the common power management infrastructure
	  for (multi-)cluster based systems, such as big.LITTLE based
	  systems.

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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"

1529
config HOTPLUG_CPU
1530 1531
	bool "Support for hot-pluggable CPUs"
	depends on SMP && HOTPLUG
1532 1533 1534 1535
	help
	  Say Y here to experiment with turning CPUs off and on.  CPUs
	  can be controlled through /sys/devices/system/cpu.

1536 1537 1538 1539 1540 1541 1542 1543 1544 1545
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").

1546 1547
config LOCAL_TIMERS
	bool "Use local timer interrupts"
1548
	depends on SMP
1549 1550 1551 1552 1553 1554 1555
	default y
	help
	  Enable support for local timers on SMP platforms, rather then the
	  legacy IPI broadcast method.  Local timers allows the system
	  accounting to be spread across the timer interval, preventing a
	  "thundering herd" at every timer tick.

1556 1557 1558
# The GPIO number here must be sorted by descending number. In case of
# a multiplatform kernel, we just want the highest value required by the
# selected platforms.
1559 1560
config ARCH_NR_GPIO
	int
1561
	default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
1562
	default 512 if SOC_OMAP5
1563
	default 392 if ARCH_U8500
1564 1565
	default 352 if ARCH_VT8500
	default 288 if ARCH_SUNXI
1566
	default 264 if MACH_H4700
1567 1568 1569 1570 1571 1572
	default 0
	help
	  Maximum number of GPIOs in the system.

	  If unsure, leave the default value.

1573
source kernel/Kconfig.preempt
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1575 1576
config HZ
	int
1577
	default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
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		ARCH_S5PV210 || ARCH_EXYNOS4
1579
	default AT91_TIMER_HZ if ARCH_AT91
1580
	default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1581 1582
	default 100

1583 1584 1585
config SCHED_HRTICK
	def_bool HIGH_RES_TIMERS

1586
config THUMB2_KERNEL
1587
	bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
1588
	depends on CPU_V7 && !CPU_V6 && !CPU_V6K
1589
	default y if CPU_THUMBONLY
1590 1591
	select AEABI
	select ARM_ASM_UNIFIED
1592
	select ARM_UNWIND
1593 1594 1595 1596 1597 1598 1599
	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.

1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630
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

1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648
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.

1649
config OABI_COMPAT
1650
	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1651
	depends on AEABI && !THUMB2_KERNEL
1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665
	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.

1666
config ARCH_HAS_HOLES_MEMORYMODEL
1667 1668
	bool

1669 1670 1671
config ARCH_SPARSEMEM_ENABLE
	bool

1672 1673 1674
config ARCH_SPARSEMEM_DEFAULT
	def_bool ARCH_SPARSEMEM_ENABLE

1675
config ARCH_SELECT_MEMORY_MODEL
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	def_bool ARCH_SPARSEMEM_ENABLE
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1678 1679 1680
config HAVE_ARCH_PFN_VALID
	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM

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config HIGHMEM
1682 1683
	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

1702 1703
config HW_PERF_EVENTS
	bool "Enable hardware performance counter support for perf events"
1704
	depends on PERF_EVENTS
1705 1706 1707 1708 1709
	default y
	help
	  Enable hardware performance counter support for perf events. If
	  disabled, perf events will use software events only.

1710 1711
source "mm/Kconfig"

1712 1713 1714
config FORCE_MAX_ZONEORDER
	int "Maximum zone order" if ARCH_SHMOBILE
	range 11 64 if ARCH_SHMOBILE
1715
	default "12" if SOC_AM33XX
1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728
	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
1731
	depends on CPU_CP15_MMU
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	default y if !ARCH_EBSA110
1733
	select HAVE_PROC_CPU if PROC_FS
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	help
1735
	  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.

1743
config UACCESS_WITH_MEMCPY
1744 1745
	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
	depends on MMU
1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758
	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.

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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)"
1791
	depends on ARM && AEABI && OF
1792
	depends on CPU_V7 && !CPU_V6
1793
	depends on !GENERIC_ATOMIC64
1794
	select ARM_PSCI
1795 1796 1797
	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"
1804
	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
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	  The base address of an area of read/write memory in the target
	  for the ROM-able zImage which must be available while the
	  decompressor is running. It must be large enough to hold the
	  entire decompressed kernel plus an additional 128 KiB.
	  Platforms which normally make use of ROM-able zImage formats
	  normally set this to a suitable value in their defconfig file.
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	  If ZBOOT_ROM is not enabled, this has no effect.

config ZBOOT_ROM
	bool "Compressed boot loader in ROM/flash"
	depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
	help
	  Say Y here if you intend to execute your compressed kernel image
	  (zImage) directly from ROM or flash.  If unsure, say N.

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choice
	prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1862
	depends on ZBOOT_ROM && ARCH_SH7372
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	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
1867 1868
	  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
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	  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

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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
1888

1889 1890
config ARM_APPENDED_DTB
	bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
1891
	depends on OF && !ZBOOT_ROM
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	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.

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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.

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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).

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choice
	prompt "Kernel command line type" if CMDLINE != ""
	default CMDLINE_FROM_BOOTLOADER
1953
	depends on ATAGS
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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.

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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.
1975
endchoice
1976

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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)"
2009
	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
M
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2013
	  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.

2021 2022
config ATAGS_PROC
	bool "Export atags in procfs"
2023
	depends on ATAGS && KEXEC
2024
	default y
2025 2026 2027 2028
	help
	  Should the atags used to boot the kernel be exported in an "atags"
	  file in procfs. Useful with kexec.

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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

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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

2053
menu "CPU Power Management"
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2054

2055
if ARCH_HAS_CPUFREQ
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source "drivers/cpufreq/Kconfig"

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

config CPU_FREQ_S3C24XX
2064
	bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
2065
	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
2076
	bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
2077
	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

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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

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source "drivers/cpuidle/Kconfig"

endmenu

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menu "Floating point emulation"

comment "At least one emulation must be selected"

config FPE_NWFPE
	bool "NWFPE math emulation"
2116
	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"
2128
	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)"
2140
	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"
2154
	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

2169 2170 2171 2172 2173 2174 2175
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"
2184
	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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2197

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config ARCH_SUSPEND_POSSIBLE
2199
	depends on !ARCH_S5PC100
2200
	depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
2201
		CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
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	def_bool y

2204 2205 2206
config ARM_CPU_SUSPEND
	def_bool PM_SLEEP

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endmenu

2209 2210
source "net/Kconfig"

2211
source "drivers/Kconfig"
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source "fs/Kconfig"

source "arch/arm/Kconfig.debug"

source "security/Kconfig"

source "crypto/Kconfig"

source "lib/Kconfig"
2222 2223

source "arch/arm/kvm/Kconfig"