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_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 GENERIC_GPIO
	bool

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config HAVE_TCM
	bool
	select GENERIC_ALLOCATOR

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config HAVE_PROC_CPU
	bool

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config NO_IOPORT
	bool

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config EISA
	bool
	---help---
	  The Extended Industry Standard Architecture (EISA) bus was
	  developed as an open alternative to the IBM MicroChannel bus.

	  The EISA bus provided some of the features of the IBM MicroChannel
	  bus while maintaining backward compatibility with cards made for
	  the older ISA bus.  The EISA bus saw limited use between 1988 and
	  1995 when it was made obsolete by the PCI bus.

	  Say Y here if you are building a kernel for an EISA-based machine.

	  Otherwise, say N.

config SBUS
	bool

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config STACKTRACE_SUPPORT
	bool
	default y

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config HAVE_LATENCYTOP_SUPPORT
	bool
	depends on !SMP
	default y

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config LOCKDEP_SUPPORT
	bool
	default y

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config TRACE_IRQFLAGS_SUPPORT
	bool
	default y

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config RWSEM_GENERIC_SPINLOCK
	bool
	default y

config RWSEM_XCHGADD_ALGORITHM
	bool

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config ARCH_HAS_ILOG2_U32
	bool

config ARCH_HAS_ILOG2_U64
	bool

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

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config GENERIC_HWEIGHT
	bool
	default y

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config GENERIC_CALIBRATE_DELAY
	bool
	default y

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config ARCH_MAY_HAVE_PC_FDC
	bool

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config ZONE_DMA
	bool

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config NEED_DMA_MAP_STATE
       def_bool y

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config ARCH_HAS_DMA_SET_COHERENT_MASK
	bool

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config GENERIC_ISA_DMA
	bool

config FIQ
	bool

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config NEED_RET_TO_USER
	bool

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config ARCH_MTD_XIP
	bool

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

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

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

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

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source "init/Kconfig"

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source "kernel/Kconfig.freezer"

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menu "System Type"

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

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

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

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

config ARCH_VERSATILE
	bool "ARM Ltd. Versatile family"
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	select ARCH_WANT_OPTIONAL_GPIOLIB
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	select ARM_AMBA
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	select ARM_TIMER_SP804
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	select ARM_VIC
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	select CLKDEV_LOOKUP
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	select GENERIC_CLOCKEVENTS
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	select HAVE_MACH_CLKDEV
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	select ICST
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	select PLAT_VERSATILE
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	select PLAT_VERSATILE_CLCD
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	select PLAT_VERSATILE_CLOCK
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	select VERSATILE_FPGA_IRQ
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	help
	  This enables support for ARM Ltd Versatile board.

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config ARCH_AT91
	bool "Atmel AT91"
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	select ARCH_REQUIRE_GPIOLIB
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	select CLKDEV_LOOKUP
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	select HAVE_CLK
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	select IRQ_DOMAIN
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	select NEED_MACH_GPIO_H
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	select NEED_MACH_IO_H if PCCARD
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	select PINCTRL
	select PINCTRL_AT91 if USE_OF
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	help
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	  This enables support for systems based on Atmel
	  AT91RM9200 and AT91SAM9* processors.
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config ARCH_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_V7
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	select GENERIC_CLOCKEVENTS
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	select MIGHT_HAVE_PCI
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	select PINCTRL
	select PINCTRL_DOVE
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	select PLAT_ORION_LEGACY
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	select USB_ARCH_HAS_EHCI
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	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).
636

637
config ARCH_SHMOBILE
638
	bool "Renesas SH-Mobile / R-Mobile"
P
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639
	select CLKDEV_LOOKUP
640
	select GENERIC_CLOCKEVENTS
641 642
	select HAVE_ARM_SCU if SMP
	select HAVE_ARM_TWD if LOCAL_TIMERS
643
	select HAVE_CLK
644
	select HAVE_MACH_CLKDEV
645
	select HAVE_SMP
646
	select MIGHT_HAVE_CACHE_L2X0
647
	select MULTI_IRQ_HANDLER
648
	select NEED_MACH_MEMORY_H
649
	select NO_IOPORT
650
	select PINCTRL if ARCH_WANT_OPTIONAL_GPIOLIB
651 652
	select PM_GENERIC_DOMAINS if PM
	select SPARSE_IRQ
653
	help
654
	  Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
655

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656 657 658
config ARCH_RPC
	bool "RiscPC"
	select ARCH_ACORN
659
	select ARCH_MAY_HAVE_PC_FDC
660
	select ARCH_SPARSEMEM_ENABLE
661
	select ARCH_USES_GETTIMEOFFSET
662
	select FIQ
663
	select HAVE_IDE
664 665
	select HAVE_PATA_PLATFORM
	select ISA_DMA_API
666
	select NEED_MACH_IO_H
667
	select NEED_MACH_MEMORY_H
668
	select NO_IOPORT
669
	select VIRT_TO_BUS
L
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670 671 672 673 674 675
	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"
676
	select ARCH_HAS_CPUFREQ
677 678 679 680 681
	select ARCH_MTD_XIP
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_SPARSEMEM_ENABLE
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
R
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682
	select CPU_FREQ
683
	select CPU_SA1100
684
	select GENERIC_CLOCKEVENTS
685
	select HAVE_IDE
686
	select ISA
687
	select NEED_MACH_GPIO_H
688
	select NEED_MACH_MEMORY_H
689
	select SPARSE_IRQ
690 691
	help
	  Support for StrongARM 11x0 based boards.
L
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692

693 694
config ARCH_S3C24XX
	bool "Samsung S3C24XX SoCs"
B
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695
	select ARCH_HAS_CPUFREQ
696
	select ARCH_REQUIRE_GPIOLIB
697
	select CLKDEV_LOOKUP
698 699
	select CLKSRC_MMIO
	select GENERIC_CLOCKEVENTS
700
	select HAVE_CLK
701
	select HAVE_S3C2410_I2C if I2C
702
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
703
	select HAVE_S3C_RTC if RTC_CLASS
704
	select MULTI_IRQ_HANDLER
705
	select NEED_MACH_GPIO_H
706
	select NEED_MACH_IO_H
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707
	help
708 709 710 711
	  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).
712

B
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713 714
config ARCH_S3C64XX
	bool "Samsung S3C64XX"
715 716
	select ARCH_HAS_CPUFREQ
	select ARCH_REQUIRE_GPIOLIB
717
	select ARM_VIC
718
	select CLKDEV_LOOKUP
719
	select CLKSRC_MMIO
720
	select CPU_V6
721
	select GENERIC_CLOCKEVENTS
B
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722
	select HAVE_CLK
723 724
	select HAVE_S3C2410_I2C if I2C
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
M
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725
	select HAVE_TCM
726
	select NEED_MACH_GPIO_H
727
	select NO_IOPORT
728 729 730
	select PLAT_SAMSUNG
	select S3C_DEV_NAND
	select S3C_GPIO_TRACK
731
	select SAMSUNG_CLKSRC
732
	select SAMSUNG_GPIOLIB_4BIT
733 734
	select SAMSUNG_IRQ_VIC_TIMER
	select USB_ARCH_HAS_OHCI
B
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735 736 737
	help
	  Samsung S3C64XX series based systems

738 739
config ARCH_S5P64X0
	bool "Samsung S5P6440 S5P6450"
740
	select CLKDEV_LOOKUP
741
	select CLKSRC_MMIO
742
	select CPU_V6
743
	select GENERIC_CLOCKEVENTS
744
	select HAVE_CLK
745
	select HAVE_S3C2410_I2C if I2C
746
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
747
	select HAVE_S3C_RTC if RTC_CLASS
748
	select NEED_MACH_GPIO_H
749
	help
750 751
	  Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
	  SMDK6450.
752

753 754
config ARCH_S5PC100
	bool "Samsung S5PC100"
755
	select ARCH_REQUIRE_GPIOLIB
756
	select CLKDEV_LOOKUP
757
	select CLKSRC_MMIO
758
	select CPU_V7
759
	select GENERIC_CLOCKEVENTS
760
	select HAVE_CLK
761
	select HAVE_S3C2410_I2C if I2C
762
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
763
	select HAVE_S3C_RTC if RTC_CLASS
764
	select NEED_MACH_GPIO_H
765
	help
766
	  Samsung S5PC100 series based systems
767

768 769
config ARCH_S5PV210
	bool "Samsung S5PV210/S5PC110"
770
	select ARCH_HAS_CPUFREQ
771
	select ARCH_HAS_HOLES_MEMORYMODEL
772
	select ARCH_SPARSEMEM_ENABLE
773
	select CLKDEV_LOOKUP
774
	select CLKSRC_MMIO
775
	select CPU_V7
776
	select GENERIC_CLOCKEVENTS
777
	select HAVE_CLK
778
	select HAVE_S3C2410_I2C if I2C
779
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
780
	select HAVE_S3C_RTC if RTC_CLASS
781
	select NEED_MACH_GPIO_H
782
	select NEED_MACH_MEMORY_H
783 784 785
	help
	  Samsung S5PV210/S5PC110 series based systems

786
config ARCH_EXYNOS
787
	bool "Samsung EXYNOS"
788
	select ARCH_HAS_CPUFREQ
789
	select ARCH_HAS_HOLES_MEMORYMODEL
790
	select ARCH_SPARSEMEM_ENABLE
791
	select CLKDEV_LOOKUP
792
	select COMMON_CLK
793
	select CPU_V7
794
	select GENERIC_CLOCKEVENTS
795
	select HAVE_CLK
796
	select HAVE_S3C2410_I2C if I2C
797
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
798
	select HAVE_S3C_RTC if RTC_CLASS
799
	select NEED_MACH_GPIO_H
800
	select NEED_MACH_MEMORY_H
801
	help
802
	  Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
803

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804 805
config ARCH_SHARK
	bool "Shark"
806
	select ARCH_USES_GETTIMEOFFSET
807
	select CPU_SA110
808 809
	select ISA
	select ISA_DMA
810
	select NEED_MACH_MEMORY_H
811
	select PCI
812
	select VIRT_TO_BUS
813
	select ZONE_DMA
814 815 816
	help
	  Support for the StrongARM based Digital DNARD machine, also known
	  as "Shark" (<http://www.shark-linux.de/shark.html>).
L
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817

818 819 820
config ARCH_U300
	bool "ST-Ericsson U300 Series"
	depends on MMU
821
	select ARCH_REQUIRE_GPIOLIB
822
	select ARM_AMBA
823
	select ARM_PATCH_PHYS_VIRT
824
	select ARM_VIC
825
	select CLKDEV_LOOKUP
826
	select CLKSRC_MMIO
827
	select COMMON_CLK
828 829 830
	select CPU_ARM926T
	select GENERIC_CLOCKEVENTS
	select HAVE_TCM
831
	select SPARSE_IRQ
832 833 834
	help
	  Support for ST-Ericsson U300 series mobile platforms.

835 836
config ARCH_DAVINCI
	bool "TI DaVinci"
837
	select ARCH_HAS_HOLES_MEMORYMODEL
838
	select ARCH_REQUIRE_GPIOLIB
839
	select CLKDEV_LOOKUP
D
David Brownell 已提交
840
	select GENERIC_ALLOCATOR
841
	select GENERIC_CLOCKEVENTS
R
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842
	select GENERIC_IRQ_CHIP
843
	select HAVE_IDE
844
	select NEED_MACH_GPIO_H
845
	select USE_OF
846
	select ZONE_DMA
847 848 849
	help
	  Support for TI's DaVinci platform.

850 851
config ARCH_OMAP1
	bool "TI OMAP1"
A
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852
	depends on MMU
853
	select ARCH_HAS_CPUFREQ
854
	select ARCH_HAS_HOLES_MEMORYMODEL
855
	select ARCH_OMAP
856
	select ARCH_REQUIRE_GPIOLIB
857
	select CLKDEV_LOOKUP
858
	select CLKSRC_MMIO
859
	select GENERIC_CLOCKEVENTS
860
	select GENERIC_IRQ_CHIP
861
	select HAVE_CLK
862 863 864 865
	select HAVE_IDE
	select IRQ_DOMAIN
	select NEED_MACH_IO_H if PCCARD
	select NEED_MACH_MEMORY_H
866
	help
867
	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
868

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869 870
endchoice

R
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871 872 873 874 875 876 877 878
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
879
	select ARCH_MULTI_V4_V5
R
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880 881 882 883

config ARCH_MULTI_V4T
	bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
	depends on !ARCH_MULTI_V6_V7
884
	select ARCH_MULTI_V4_V5
R
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885 886 887 888

config ARCH_MULTI_V5
	bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
	depends on !ARCH_MULTI_V6_V7
889
	select ARCH_MULTI_V4_V5
R
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890 891 892 893 894

config ARCH_MULTI_V4_V5
	bool

config ARCH_MULTI_V6
895
	bool "ARMv6 based platforms (ARM11)"
R
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896
	select ARCH_MULTI_V6_V7
897
	select CPU_V6
R
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898 899

config ARCH_MULTI_V7
900
	bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
R
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901 902
	default y
	select ARCH_MULTI_V6_V7
903 904
	select ARCH_VEXPRESS
	select CPU_V7
R
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905 906 907 908 909 910 911 912 913 914

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

915 916 917 918 919
#
# 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.
#
920 921
source "arch/arm/mach-mvebu/Kconfig"

922 923
source "arch/arm/mach-at91/Kconfig"

924 925
source "arch/arm/mach-bcm/Kconfig"

926 927
source "arch/arm/mach-bcm2835/Kconfig"

L
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928 929
source "arch/arm/mach-clps711x/Kconfig"

930 931
source "arch/arm/mach-cns3xxx/Kconfig"

932 933 934 935
source "arch/arm/mach-davinci/Kconfig"

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

936 937
source "arch/arm/mach-ep93xx/Kconfig"

L
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938 939
source "arch/arm/mach-footbridge/Kconfig"

940 941
source "arch/arm/mach-gemini/Kconfig"

R
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942 943
source "arch/arm/mach-highbank/Kconfig"

L
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944 945
source "arch/arm/mach-integrator/Kconfig"

946 947 948
source "arch/arm/mach-iop32x/Kconfig"

source "arch/arm/mach-iop33x/Kconfig"
L
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949

950 951
source "arch/arm/mach-iop13xx/Kconfig"

L
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952 953
source "arch/arm/mach-ixp4xx/Kconfig"

954 955 956 957 958 959
source "arch/arm/mach-kirkwood/Kconfig"

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

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

960 961
source "arch/arm/mach-mv78xx0/Kconfig"

S
Shawn Guo 已提交
962
source "arch/arm/mach-imx/Kconfig"
L
Linus Torvalds 已提交
963

964 965
source "arch/arm/mach-mxs/Kconfig"

966
source "arch/arm/mach-netx/Kconfig"
967

968 969
source "arch/arm/mach-nomadik/Kconfig"

970 971 972
source "arch/arm/plat-omap/Kconfig"

source "arch/arm/mach-omap1/Kconfig"
L
Linus Torvalds 已提交
973

974 975
source "arch/arm/mach-omap2/Kconfig"

976
source "arch/arm/mach-orion5x/Kconfig"
977

R
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978 979
source "arch/arm/mach-picoxcell/Kconfig"

980 981
source "arch/arm/mach-pxa/Kconfig"
source "arch/arm/plat-pxa/Kconfig"
982

983 984 985 986 987
source "arch/arm/mach-mmp/Kconfig"

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

source "arch/arm/mach-sa1100/Kconfig"
988

989
source "arch/arm/plat-samsung/Kconfig"
990

R
Rob Herring 已提交
991 992
source "arch/arm/mach-socfpga/Kconfig"

993
source "arch/arm/mach-spear/Kconfig"
994

995
source "arch/arm/mach-s3c24xx/Kconfig"
L
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996

B
Ben Dooks 已提交
997
if ARCH_S3C64XX
998
source "arch/arm/mach-s3c64xx/Kconfig"
B
Ben Dooks 已提交
999 1000
endif

1001
source "arch/arm/mach-s5p64x0/Kconfig"
1002

1003 1004
source "arch/arm/mach-s5pc100/Kconfig"

1005 1006
source "arch/arm/mach-s5pv210/Kconfig"

1007
source "arch/arm/mach-exynos/Kconfig"
1008

1009
source "arch/arm/mach-shmobile/Kconfig"
1010

1011 1012
source "arch/arm/mach-sunxi/Kconfig"

1013 1014
source "arch/arm/mach-prima2/Kconfig"

1015 1016
source "arch/arm/mach-tegra/Kconfig"

1017
source "arch/arm/mach-u300/Kconfig"
L
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1018

1019
source "arch/arm/mach-ux500/Kconfig"
L
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1020 1021 1022

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

1023
source "arch/arm/mach-vexpress/Kconfig"
1024
source "arch/arm/plat-versatile/Kconfig"
1025

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

1028 1029
source "arch/arm/mach-vt8500/Kconfig"

1030 1031
source "arch/arm/mach-w90x900/Kconfig"

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

L
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1034 1035 1036 1037
# Definitions to make life easier
config ARCH_ACORN
	bool

1038 1039
config PLAT_IOP
	bool
M
Mikael Pettersson 已提交
1040
	select GENERIC_CLOCKEVENTS
1041

L
Lennert Buytenhek 已提交
1042 1043
config PLAT_ORION
	bool
1044
	select CLKSRC_MMIO
1045
	select COMMON_CLK
R
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1046
	select GENERIC_IRQ_CHIP
1047
	select IRQ_DOMAIN
L
Lennert Buytenhek 已提交
1048

1049 1050 1051 1052
config PLAT_ORION_LEGACY
	bool
	select PLAT_ORION

1053 1054 1055
config PLAT_PXA
	bool

1056 1057 1058
config PLAT_VERSATILE
	bool

1059 1060
config ARM_TIMER_SP804
	bool
1061
	select CLKSRC_MMIO
1062
	select CLKSRC_OF if OF
1063

L
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1064 1065
source arch/arm/mm/Kconfig

1066 1067 1068 1069 1070
config ARM_NR_BANKS
	int
	default 16 if ARCH_EP93XX
	default 8

1071
config IWMMXT
1072
	bool "Enable iWMMXt support" if !CPU_PJ4
1073
	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
1074
	default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4
1075 1076 1077 1078
	help
	  Enable support for iWMMXt context switching at run time if
	  running on a CPU that supports it.

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1079 1080
config XSCALE_PMU
	bool
1081
	depends on CPU_XSCALE
L
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1082 1083
	default y

1084 1085 1086 1087 1088
config MULTI_IRQ_HANDLER
	bool
	help
	  Allow each machine to specify it's own IRQ handler at run time.

1089 1090 1091 1092
if !MMU
source "arch/arm/Kconfig-nommu"
endif

1093 1094 1095 1096 1097 1098 1099 1100 1101
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.

1102 1103
config ARM_ERRATA_411920
	bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1104
	depends on CPU_V6 || CPU_V6K
1105 1106 1107 1108 1109 1110
	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.

1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126
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.

1127 1128 1129
config ARM_ERRATA_458693
	bool "ARM errata: Processor deadlock when a false hazard is created"
	depends on CPU_V7
1130
	depends on !ARCH_MULTIPLATFORM
1131 1132 1133 1134 1135 1136 1137 1138 1139 1140
	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.

1141 1142 1143
config ARM_ERRATA_460075
	bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
	depends on CPU_V7
1144
	depends on !ARCH_MULTIPLATFORM
1145 1146 1147 1148 1149 1150 1151 1152 1153
	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.

1154 1155 1156
config ARM_ERRATA_742230
	bool "ARM errata: DMB operation may be faulty"
	depends on CPU_V7 && SMP
1157
	depends on !ARCH_MULTIPLATFORM
1158 1159 1160 1161 1162 1163 1164 1165 1166
	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.

1167 1168 1169
config ARM_ERRATA_742231
	bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
	depends on CPU_V7 && SMP
1170
	depends on !ARCH_MULTIPLATFORM
1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181
	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.

1182
config PL310_ERRATA_588369
1183
	bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
1184
	depends on CACHE_L2X0
1185 1186 1187 1188 1189 1190 1191 1192
	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
1193
	   invalidated as a result of these operations.
1194 1195 1196

config ARM_ERRATA_720789
	bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1197
	depends on CPU_V7
1198 1199 1200 1201 1202 1203 1204 1205
	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.
1206

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config PL310_ERRATA_727915
1208
	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.

1218 1219 1220
config ARM_ERRATA_743622
	bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
	depends on CPU_V7
1221
	depends on !ARCH_MULTIPLATFORM
1222 1223
	help
	  This option enables the workaround for the 743622 Cortex-A9
1224
	  (r2p*) erratum. Under very rare conditions, a faulty
1225 1226 1227 1228 1229 1230 1231
	  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.

1232 1233
config ARM_ERRATA_751472
	bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1234
	depends on CPU_V7
1235
	depends on !ARCH_MULTIPLATFORM
1236 1237 1238 1239 1240 1241 1242
	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.

1243 1244
config PL310_ERRATA_753970
	bool "PL310 errata: cache sync operation may be faulty"
1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257
	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.

1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268
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.

1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279
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.

1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291
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.

1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305
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.

1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317
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.

1356
# Select ISA DMA controller support
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config ISA_DMA
	bool
1359
	select ISA_DMA_API
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1361
# Select ISA DMA interface
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config ISA_DMA_API
	bool

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config PCI
1366
	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.

1373 1374 1375 1376
config PCI_DOMAINS
	bool
	depends on PCI

1377 1378 1379 1380 1381 1382
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"

1406 1407 1408 1409 1410 1411 1412 1413 1414
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
1416
	bool "Symmetric Multi-Processing"
1417
	depends on CPU_V6K || CPU_V7
1418
	depends on GENERIC_CLOCKEVENTS
1419
	depends on HAVE_SMP
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	depends on MMU
1421
	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
1435
	  <http://tldp.org/HOWTO/SMP-HOWTO.html>.
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	  If you don't know what to do here, say N.

1439 1440
config SMP_ON_UP
	bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1441
	depends on SMP && !XIP_KERNEL
1442 1443 1444 1445 1446 1447 1448 1449 1450
	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

1481
config HAVE_ARM_ARCH_TIMER
1482 1483
	bool "Architected timer support"
	depends on CPU_V7
1484
	select ARM_ARCH_TIMER
1485 1486 1487
	help
	  This option enables support for the ARM architected timer

1488 1489 1490
config HAVE_ARM_TWD
	bool
	depends on SMP
1491
	select CLKSRC_OF if OF
1492 1493 1494
	help
	  This options enables support for the ARM timer and watchdog unit

1495 1496 1497 1498 1499 1500 1501 1502
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"

1532
config HOTPLUG_CPU
1533 1534
	bool "Support for hot-pluggable CPUs"
	depends on SMP && HOTPLUG
1535 1536 1537 1538
	help
	  Say Y here to experiment with turning CPUs off and on.  CPUs
	  can be controlled through /sys/devices/system/cpu.

1539 1540 1541 1542 1543 1544 1545 1546 1547 1548
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").

1549 1550
config LOCAL_TIMERS
	bool "Use local timer interrupts"
1551
	depends on SMP
1552 1553 1554 1555 1556 1557 1558
	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.

1559 1560 1561
# 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.
1562 1563
config ARCH_NR_GPIO
	int
1564
	default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
1565
	default 512 if SOC_OMAP5
1566
	default 392 if ARCH_U8500
1567 1568
	default 352 if ARCH_VT8500
	default 288 if ARCH_SUNXI
1569
	default 264 if MACH_H4700
1570 1571 1572 1573 1574 1575
	default 0
	help
	  Maximum number of GPIOs in the system.

	  If unsure, leave the default value.

1576
source kernel/Kconfig.preempt
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1578 1579
config HZ
	int
1580
	default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
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		ARCH_S5PV210 || ARCH_EXYNOS4
1582
	default AT91_TIMER_HZ if ARCH_AT91
1583
	default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1584 1585
	default 100

1586 1587 1588
config SCHED_HRTICK
	def_bool HIGH_RES_TIMERS

1589
config THUMB2_KERNEL
1590
	bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
1591
	depends on CPU_V7 && !CPU_V6 && !CPU_V6K
1592
	default y if CPU_THUMBONLY
1593 1594
	select AEABI
	select ARM_ASM_UNIFIED
1595
	select ARM_UNWIND
1596 1597 1598 1599 1600 1601 1602
	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.

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 1631 1632 1633
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

1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651
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.

1652
config OABI_COMPAT
1653
	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1654
	depends on AEABI && !THUMB2_KERNEL
1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668
	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.

1669
config ARCH_HAS_HOLES_MEMORYMODEL
1670 1671
	bool

1672 1673 1674
config ARCH_SPARSEMEM_ENABLE
	bool

1675 1676 1677
config ARCH_SPARSEMEM_DEFAULT
	def_bool ARCH_SPARSEMEM_ENABLE

1678
config ARCH_SELECT_MEMORY_MODEL
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	def_bool ARCH_SPARSEMEM_ENABLE
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1681 1682 1683
config HAVE_ARCH_PFN_VALID
	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM

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config HIGHMEM
1685 1686
	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

1705 1706
config HW_PERF_EVENTS
	bool "Enable hardware performance counter support for perf events"
1707
	depends on PERF_EVENTS
1708 1709 1710 1711 1712
	default y
	help
	  Enable hardware performance counter support for perf events. If
	  disabled, perf events will use software events only.

1713 1714
source "mm/Kconfig"

1715 1716 1717
config FORCE_MAX_ZONEORDER
	int "Maximum zone order" if ARCH_SHMOBILE
	range 11 64 if ARCH_SHMOBILE
1718
	default "12" if SOC_AM33XX
1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731
	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
1734
	depends on CPU_CP15_MMU
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	default y if !ARCH_EBSA110
1736
	select HAVE_PROC_CPU if PROC_FS
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	help
1738
	  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.

1746
config UACCESS_WITH_MEMCPY
1747 1748
	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
	depends on MMU
1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761
	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)"
1794
	depends on ARM && AEABI && OF
1795
	depends on CPU_V7 && !CPU_V6
1796
	depends on !GENERIC_ATOMIC64
1797
	select ARM_PSCI
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	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"
1807
	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)"
1865
	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
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	  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
1891

1892 1893
config ARM_APPENDED_DTB
	bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
1894
	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
1956
	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.
1978
endchoice
1979

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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)"
2012
	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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2016
	  but it is independent of the system firmware.   And like a reboot
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	  you can start any kernel with it, not just Linux.

	  It is an ongoing process to be certain the hardware in a machine
	  is properly shutdown, so do not be surprised if this code does not
	  initially work for you.  It may help to enable device hotplugging
	  support.

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

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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

2056
menu "CPU Power Management"
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2058
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
2067
	bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
2068
	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
2079
	bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
2080
	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"
2119
	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"
2131
	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)"
2143
	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"
2157
	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

2172 2173 2174 2175 2176 2177 2178
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"
2187
	depends on !AEABI
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	help
	  Say Y here to include the kernel code necessary if you want to run
	  Acorn RISC OS/Arthur binaries under Linux. This code is still very
	  experimental; if this sounds frightening, say N and sleep in peace.
	  You can also say M here to compile this support as a module (which
	  will be called arthur).

endmenu

menu "Power management options"

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source "kernel/power/Kconfig"
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config ARCH_SUSPEND_POSSIBLE
2202
	depends on !ARCH_S5PC100
2203
	depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
2204
		CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
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	def_bool y

2207 2208 2209
config ARM_CPU_SUSPEND
	def_bool PM_SLEEP

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endmenu

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source "net/Kconfig"

2214
source "drivers/Kconfig"
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source "fs/Kconfig"

source "arch/arm/Kconfig.debug"

source "security/Kconfig"

source "crypto/Kconfig"

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