Kconfig 63.1 KB
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config ARM
	bool
	default y
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	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
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	select ARCH_HAS_DEVMEM_IS_ALLOWED
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	select ARCH_HAS_ELF_RANDOMIZE
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	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
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	select ARCH_HAVE_CUSTOM_GPIO_H
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	select ARCH_HAS_GCOV_PROFILE_ALL
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	select ARCH_MIGHT_HAVE_PC_PARPORT
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	select ARCH_SUPPORTS_ATOMIC_RMW
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	select ARCH_USE_BUILTIN_BSWAP
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	select ARCH_USE_CMPXCHG_LOCKREF
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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 CLONE_BACKWARDS
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	select CPU_PM if (SUSPEND || CPU_IDLE)
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	select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS
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	select EDAC_SUPPORT
	select EDAC_ATOMIC_SCRUB
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	select GENERIC_ALLOCATOR
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	select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
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	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
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	select GENERIC_EARLY_IOREMAP
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	select GENERIC_IDLE_POLL_SETUP
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	select GENERIC_IRQ_PROBE
	select GENERIC_IRQ_SHOW
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	select GENERIC_IRQ_SHOW_LEVEL
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	select GENERIC_PCI_IOMAP
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	select GENERIC_SCHED_CLOCK
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	select GENERIC_SMP_IDLE_THREAD
	select GENERIC_STRNCPY_FROM_USER
	select GENERIC_STRNLEN_USER
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	select HANDLE_DOMAIN_IRQ
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	select HARDIRQS_SW_RESEND
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	select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT)
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	select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6
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	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU
	select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU
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	select HAVE_ARCH_MMAP_RND_BITS if MMU
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	select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
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	select HAVE_ARCH_TRACEHOOK
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	select HAVE_ARM_SMCCC if CPU_V7
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	select HAVE_CBPF_JIT
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	select HAVE_CC_STACKPROTECTOR
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	select HAVE_CONTEXT_TRACKING
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	select HAVE_C_RECORDMCOUNT
	select HAVE_DEBUG_KMEMLEAK
	select HAVE_DMA_API_DEBUG
	select HAVE_DMA_CONTIGUOUS if MMU
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	select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) && !CPU_ENDIAN_BE32 && MMU
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	select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU
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	select HAVE_EXIT_THREAD
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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_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
	select HAVE_IDE if PCI || ISA || PCMCIA
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	select HAVE_IRQ_TIME_ACCOUNTING
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	select HAVE_KERNEL_GZIP
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	select HAVE_KERNEL_LZ4
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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 && !CPU_ENDIAN_BE32 && !CPU_V7M
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	select HAVE_KRETPROBES if (HAVE_KPROBES)
	select HAVE_MEMBLOCK
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	select HAVE_MOD_ARCH_SPECIFIC
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	select HAVE_NMI
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	select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
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	select HAVE_OPTPROBES if !THUMB2_KERNEL
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	select HAVE_PERF_EVENTS
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	select HAVE_PERF_REGS
	select HAVE_PERF_USER_STACK_DUMP
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	select HAVE_RCU_TABLE_FREE if (SMP && ARM_LPAE)
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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 HAVE_VIRT_CPU_ACCOUNTING_GEN
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	select IRQ_FORCED_THREADING
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	select MODULES_USE_ELF_REL
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	select NO_BOOTMEM
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	select OF_EARLY_FLATTREE if OF
	select OF_RESERVED_MEM if OF
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	select OLD_SIGACTION
	select OLD_SIGSUSPEND3
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	select PERF_USE_VMALLOC
	select RTC_LIB
	select SYS_SUPPORTS_APM_EMULATION
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	# Above selects are sorted alphabetically; please add new ones
	# according to that.  Thanks.
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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
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	select ARCH_HAS_SG_CHAIN
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	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 MIGHT_HAVE_PCI
	bool

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config SYS_SUPPORTS_APM_EMULATION
	bool

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config HAVE_TCM
	bool
	select GENERIC_ALLOCATOR

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config HAVE_PROC_CPU
	bool

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config NO_IOPORT_MAP
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	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

config LOCKDEP_SUPPORT
	bool
	default y

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config TRACE_IRQFLAGS_SUPPORT
	bool
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	default !CPU_V7M
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config RWSEM_XCHGADD_ALGORITHM
	bool
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	default y
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config ARCH_HAS_ILOG2_U32
	bool

config ARCH_HAS_ILOG2_U64
	bool

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config ARCH_HAS_BANDGAP
	bool

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config FIX_EARLYCON_MEM
	def_bool y if MMU

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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_SUPPORTS_UPROBES
	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
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	  The base address of exception vectors.  This must be two pages
	  in size.
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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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	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_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
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	default DRAM_BASE if !MMU
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	default 0x00000000 if ARCH_EBSA110 || \
			ARCH_FOOTBRIDGE || \
			ARCH_INTEGRATOR || \
			ARCH_IOP13XX || \
			ARCH_KS8695 || \
			(ARCH_REALVIEW && !REALVIEW_HIGH_PHYS_OFFSET)
	default 0x10000000 if ARCH_OMAP1 || ARCH_RPC
	default 0x20000000 if ARCH_S5PV210
	default 0x70000000 if REALVIEW_HIGH_PHYS_OFFSET
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	default 0xc0000000 if ARCH_SA1100
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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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config PGTABLE_LEVELS
	int
	default 3 if ARM_LPAE
	default 2

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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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config ARCH_MMAP_RND_BITS_MIN
	default 8

config ARCH_MMAP_RND_BITS_MAX
	default 14 if PAGE_OFFSET=0x40000000
	default 15 if PAGE_OFFSET=0x80000000
	default 16

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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 ARM_SINGLE_ARMV7M if !MMU
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	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 ARCH_WANT_OPTIONAL_GPIOLIB
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	select ARM_HAS_SG_CHAIN
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	select ARM_PATCH_PHYS_VIRT
	select AUTO_ZRELADDR
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	select CLKSRC_OF
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	select COMMON_CLK
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	select GENERIC_CLOCKEVENTS
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	select MIGHT_HAVE_PCI
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	select MULTI_IRQ_HANDLER
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	select SPARSE_IRQ
	select USE_OF

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config ARM_SINGLE_ARMV7M
	bool "ARMv7-M based platforms (Cortex-M0/M3/M4)"
	depends on !MMU
	select ARCH_WANT_OPTIONAL_GPIOLIB
	select ARM_NVIC
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	select AUTO_ZRELADDR
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	select CLKSRC_OF
	select COMMON_CLK
	select CPU_V7M
	select GENERIC_CLOCKEVENTS
	select NO_IOPORT_MAP
	select SPARSE_IRQ
	select USE_OF

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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 CLKSRC_MMIO
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	select COMMON_CLK
	select CPU_ARM720T
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	select GENERIC_CLOCKEVENTS
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	select MFD_SYSCON
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	select SOC_BUS
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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 CLKSRC_MMIO
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	select CPU_FA526
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	select GENERIC_CLOCKEVENTS
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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_MAP
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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
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	select ARM_AMBA
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	select ARM_PATCH_PHYS_VIRT
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	select ARM_VIC
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	select AUTO_ZRELADDR
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	select CLKDEV_LOOKUP
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	select CLKSRC_MMIO
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	select CPU_ARM920T
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	select GENERIC_CLOCKEVENTS
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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
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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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	select SPARSE_IRQ
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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 GPIO_IOP
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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 GPIO_IOP
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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 ARCH_SUPPORTS_BIG_ENDIAN
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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_DESC
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	select USB_EHCI_BIG_ENDIAN_MMIO
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	help
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	  Support for Intel's IXP4XX (XScale) family of processors.
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config ARCH_DOVE
	bool "Marvell Dove"
	select ARCH_REQUIRE_GPIOLIB
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	select CPU_PJ4
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	select GENERIC_CLOCKEVENTS
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	select MIGHT_HAVE_PCI
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	select MULTI_IRQ_HANDLER
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	select MVEBU_MBUS
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	select PINCTRL
	select PINCTRL_DOVE
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	select PLAT_ORION_LEGACY
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	select SPARSE_IRQ
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	select PM_GENERIC_DOMAINS if PM
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	help
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	  Support for the Marvell Dove SoC 88AP510
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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
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	select CLKSRC_LPC32XX
	select COMMON_CLK
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	select CPU_ARM926T
	select GENERIC_CLOCKEVENTS
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	select MULTI_IRQ_HANDLER
	select SPARSE_IRQ
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	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_MTD_XIP
	select ARCH_REQUIRE_GPIOLIB
	select ARM_CPU_SUSPEND if PM
	select AUTO_ZRELADDR
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	select COMMON_CLK
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	select CLKDEV_LOOKUP
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	select CLKSRC_PXA
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	select CLKSRC_MMIO
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	select CLKSRC_OF
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	select CPU_XSCALE if !CPU_XSC3
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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 IRQ_DOMAIN
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	select MULTI_IRQ_HANDLER
	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_RPC
	bool "RiscPC"
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	depends on MMU
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	select ARCH_ACORN
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	select ARCH_MAY_HAVE_PC_FDC
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	select ARCH_SPARSEMEM_ENABLE
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	select ARCH_USES_GETTIMEOFFSET
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	select CPU_SA110
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	select FIQ
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	select HAVE_IDE
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	select HAVE_PATA_PLATFORM
	select ISA_DMA_API
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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_MAP
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	help
	  On the Acorn Risc-PC, Linux can support the internal IDE disk and
	  CD-ROM interface, serial and parallel port, and the floppy drive.

config ARCH_SA1100
	bool "SA1100-based"
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	select ARCH_MTD_XIP
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_SPARSEMEM_ENABLE
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
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	select CLKSRC_PXA
	select CLKSRC_OF if OF
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	select CPU_FREQ
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	select CPU_SA1100
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	select GENERIC_CLOCKEVENTS
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	select HAVE_IDE
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	select IRQ_DOMAIN
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	select ISA
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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 StrongARM 11x0 based boards.
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605 606
config ARCH_S3C24XX
	bool "Samsung S3C24XX SoCs"
607
	select ARCH_REQUIRE_GPIOLIB
608
	select ATAGS
609
	select CLKDEV_LOOKUP
610
	select CLKSRC_SAMSUNG_PWM
611
	select GENERIC_CLOCKEVENTS
612
	select GPIO_SAMSUNG
613
	select HAVE_S3C2410_I2C if I2C
614
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
615
	select HAVE_S3C_RTC if RTC_CLASS
616
	select MULTI_IRQ_HANDLER
617
	select NEED_MACH_IO_H
618
	select SAMSUNG_ATAGS
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	help
620 621 622 623
	  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).
624

625 626
config ARCH_DAVINCI
	bool "TI DaVinci"
627
	select ARCH_HAS_HOLES_MEMORYMODEL
628
	select ARCH_REQUIRE_GPIOLIB
629
	select CLKDEV_LOOKUP
630
	select CPU_ARM926T
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	select GENERIC_ALLOCATOR
632
	select GENERIC_CLOCKEVENTS
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	select GENERIC_IRQ_CHIP
634
	select HAVE_IDE
635
	select USE_OF
636
	select ZONE_DMA
637 638 639
	help
	  Support for TI's DaVinci platform.

640 641
config ARCH_OMAP1
	bool "TI OMAP1"
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	depends on MMU
643
	select ARCH_HAS_HOLES_MEMORYMODEL
644
	select ARCH_OMAP
645
	select ARCH_REQUIRE_GPIOLIB
646
	select CLKDEV_LOOKUP
647
	select CLKSRC_MMIO
648
	select GENERIC_CLOCKEVENTS
649 650 651
	select GENERIC_IRQ_CHIP
	select HAVE_IDE
	select IRQ_DOMAIN
652
	select MULTI_IRQ_HANDLER
653 654
	select NEED_MACH_IO_H if PCCARD
	select NEED_MACH_MEMORY_H
655
	select SPARSE_IRQ
656
	help
657
	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
658

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endchoice

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menu "Multiple platform selection"
	depends on ARCH_MULTIPLATFORM

comment "CPU Core family selection"

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config ARCH_MULTI_V4
	bool "ARMv4 based platforms (FA526)"
	depends on !ARCH_MULTI_V6_V7
	select ARCH_MULTI_V4_V5
	select CPU_FA526

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config ARCH_MULTI_V4T
	bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
	depends on !ARCH_MULTI_V6_V7
675
	select ARCH_MULTI_V4_V5
676 677 678
	select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
		CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
		CPU_ARM925T || CPU_ARM940T)
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config ARCH_MULTI_V5
	bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
	depends on !ARCH_MULTI_V6_V7
683
	select ARCH_MULTI_V4_V5
684
	select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \
685 686
		CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
		CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
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config ARCH_MULTI_V4_V5
	bool

config ARCH_MULTI_V6
692
	bool "ARMv6 based platforms (ARM11)"
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	select ARCH_MULTI_V6_V7
694
	select CPU_V6K
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config ARCH_MULTI_V7
697
	bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
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	default y
	select ARCH_MULTI_V6_V7
700
	select CPU_V7
701
	select HAVE_SMP
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config ARCH_MULTI_V6_V7
	bool
705
	select MIGHT_HAVE_CACHE_L2X0
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config ARCH_MULTI_CPU_AUTO
	def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
	select ARCH_MULTI_V5

endmenu

713
config ARCH_VIRT
714 715
	bool "Dummy Virtual Machine"
	depends on ARCH_MULTI_V7
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	select ARM_AMBA
717
	select ARM_GIC
718
	select ARM_GIC_V2M if PCI_MSI
719
	select ARM_GIC_V3
720
	select ARM_PSCI
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	select HAVE_ARM_ARCH_TIMER
722

723 724 725 726 727
#
# 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.
#
728 729
source "arch/arm/mach-mvebu/Kconfig"

730 731
source "arch/arm/mach-alpine/Kconfig"

732 733
source "arch/arm/mach-artpec/Kconfig"

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source "arch/arm/mach-asm9260/Kconfig"

736 737
source "arch/arm/mach-at91/Kconfig"

738 739
source "arch/arm/mach-axxia/Kconfig"

740 741
source "arch/arm/mach-bcm/Kconfig"

742 743
source "arch/arm/mach-berlin/Kconfig"

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

746 747
source "arch/arm/mach-cns3xxx/Kconfig"

748 749
source "arch/arm/mach-davinci/Kconfig"

750 751
source "arch/arm/mach-digicolor/Kconfig"

752 753
source "arch/arm/mach-dove/Kconfig"

754 755
source "arch/arm/mach-ep93xx/Kconfig"

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

758 759
source "arch/arm/mach-gemini/Kconfig"

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

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

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

766 767 768
source "arch/arm/mach-iop32x/Kconfig"

source "arch/arm/mach-iop33x/Kconfig"
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770 771
source "arch/arm/mach-iop13xx/Kconfig"

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

774 775
source "arch/arm/mach-keystone/Kconfig"

776 777
source "arch/arm/mach-ks8695/Kconfig"

778 779
source "arch/arm/mach-meson/Kconfig"

780 781
source "arch/arm/mach-moxart/Kconfig"

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

784 785
source "arch/arm/mach-mv78xx0/Kconfig"

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source "arch/arm/mach-imx/Kconfig"
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788 789
source "arch/arm/mach-mediatek/Kconfig"

790 791
source "arch/arm/mach-mxs/Kconfig"

792
source "arch/arm/mach-netx/Kconfig"
793

794 795
source "arch/arm/mach-nomadik/Kconfig"

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

798 799 800
source "arch/arm/plat-omap/Kconfig"

source "arch/arm/mach-omap1/Kconfig"
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802 803
source "arch/arm/mach-omap2/Kconfig"

804
source "arch/arm/mach-orion5x/Kconfig"
805

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

808 809
source "arch/arm/mach-pxa/Kconfig"
source "arch/arm/plat-pxa/Kconfig"
810

811 812
source "arch/arm/mach-mmp/Kconfig"

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

815 816
source "arch/arm/mach-qcom/Kconfig"

817 818
source "arch/arm/mach-realview/Kconfig"

819 820
source "arch/arm/mach-rockchip/Kconfig"

821
source "arch/arm/mach-sa1100/Kconfig"
822

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

825
source "arch/arm/mach-spear/Kconfig"
826

827 828
source "arch/arm/mach-sti/Kconfig"

829
source "arch/arm/mach-s3c24xx/Kconfig"
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831
source "arch/arm/mach-s3c64xx/Kconfig"
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833 834
source "arch/arm/mach-s5pv210/Kconfig"

835
source "arch/arm/mach-exynos/Kconfig"
836
source "arch/arm/plat-samsung/Kconfig"
837

838
source "arch/arm/mach-shmobile/Kconfig"
839

840 841
source "arch/arm/mach-sunxi/Kconfig"

842 843
source "arch/arm/mach-prima2/Kconfig"

844 845
source "arch/arm/mach-tango/Kconfig"

846 847
source "arch/arm/mach-tegra/Kconfig"

848
source "arch/arm/mach-u300/Kconfig"
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850 851
source "arch/arm/mach-uniphier/Kconfig"

852
source "arch/arm/mach-ux500/Kconfig"
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source "arch/arm/mach-versatile/Kconfig"

856
source "arch/arm/mach-vexpress/Kconfig"
857
source "arch/arm/plat-versatile/Kconfig"
858

859 860
source "arch/arm/mach-vt8500/Kconfig"

861 862
source "arch/arm/mach-w90x900/Kconfig"

863 864
source "arch/arm/mach-zx/Kconfig"

865 866
source "arch/arm/mach-zynq/Kconfig"

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# ARMv7-M architecture
config ARCH_EFM32
	bool "Energy Micro efm32"
	depends on ARM_SINGLE_ARMV7M
	select ARCH_REQUIRE_GPIOLIB
	help
	  Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko
	  processors.

config ARCH_LPC18XX
	bool "NXP LPC18xx/LPC43xx"
	depends on ARM_SINGLE_ARMV7M
	select ARCH_HAS_RESET_CONTROLLER
	select ARM_AMBA
	select CLKSRC_LPC32XX
	select PINCTRL
	help
	  Support for NXP's LPC18xx Cortex-M3 and LPC43xx Cortex-M4
	  high performance microcontrollers.

config ARCH_STM32
	bool "STMicrolectronics STM32"
	depends on ARM_SINGLE_ARMV7M
	select ARCH_HAS_RESET_CONTROLLER
	select ARMV7M_SYSTICK
892
	select CLKSRC_STM32
893
	select PINCTRL
894 895 896 897
	select RESET_CONTROLLER
	help
	  Support for STMicroelectronics STM32 processors.

898 899 900 901 902
config MACH_STM32F429
	bool "STMicrolectronics STM32F429"
	depends on ARCH_STM32
	default y

903 904 905 906 907 908 909 910 911 912 913 914
config ARCH_MPS2
	bool "ARM MPS2 paltform"
	depends on ARM_SINGLE_ARMV7M
	select ARM_AMBA
	select CLKSRC_MPS2
	help
	  Support for Cortex-M Prototyping System (or V2M-MPS2) which comes
	  with a range of available cores like Cortex-M3/M4/M7.

	  Please, note that depends which Application Note is used memory map
	  for the platform may vary, so adjustment of RAM base might be needed.

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# Definitions to make life easier
config ARCH_ACORN
	bool

919 920
config PLAT_IOP
	bool
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	select GENERIC_CLOCKEVENTS
922

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config PLAT_ORION
	bool
925
	select CLKSRC_MMIO
926
	select COMMON_CLK
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	select GENERIC_IRQ_CHIP
928
	select IRQ_DOMAIN
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929

930 931 932 933
config PLAT_ORION_LEGACY
	bool
	select PLAT_ORION

934 935 936
config PLAT_PXA
	bool

937 938 939
config PLAT_VERSATILE
	bool

940 941
source "arch/arm/firmware/Kconfig"

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942 943
source arch/arm/mm/Kconfig

944
config IWMMXT
945 946 947
	bool "Enable iWMMXt support"
	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B
	default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B
948 949 950 951
	help
	  Enable support for iWMMXt context switching at run time if
	  running on a CPU that supports it.

952 953 954 955 956
config MULTI_IRQ_HANDLER
	bool
	help
	  Allow each machine to specify it's own IRQ handler at run time.

957 958 959 960
if !MMU
source "arch/arm/Kconfig-nommu"
endif

961 962 963 964 965 966 967 968 969 970 971 972 973 974
config PJ4B_ERRATA_4742
	bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
	depends on CPU_PJ4B && MACH_ARMADA_370
	default y
	help
	  When coming out of either a Wait for Interrupt (WFI) or a Wait for
	  Event (WFE) IDLE states, a specific timing sensitivity exists between
	  the retiring WFI/WFE instructions and the newly issued subsequent
	  instructions.  This sensitivity can result in a CPU hang scenario.
	  Workaround:
	  The software must insert either a Data Synchronization Barrier (DSB)
	  or Data Memory Barrier (DMB) command immediately after the WFI/WFE
	  instruction

975 976 977 978 979 980 981 982 983
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.

984 985
config ARM_ERRATA_411920
	bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
986
	depends on CPU_V6 || CPU_V6K
987 988 989 990 991 992
	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.

993 994 995 996 997
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
998
	  r1p* erratum. If a code sequence containing an ARM/Thumb
999 1000 1001 1002 1003 1004 1005 1006 1007 1008
	  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.

1009 1010 1011
config ARM_ERRATA_458693
	bool "ARM errata: Processor deadlock when a false hazard is created"
	depends on CPU_V7
1012
	depends on !ARCH_MULTIPLATFORM
1013 1014 1015 1016 1017 1018 1019 1020 1021 1022
	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.

1023 1024 1025
config ARM_ERRATA_460075
	bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
	depends on CPU_V7
1026
	depends on !ARCH_MULTIPLATFORM
1027 1028 1029 1030 1031 1032 1033 1034 1035
	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.

1036 1037 1038
config ARM_ERRATA_742230
	bool "ARM errata: DMB operation may be faulty"
	depends on CPU_V7 && SMP
1039
	depends on !ARCH_MULTIPLATFORM
1040 1041 1042 1043 1044 1045 1046 1047 1048
	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.

1049 1050 1051
config ARM_ERRATA_742231
	bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
	depends on CPU_V7 && SMP
1052
	depends on !ARCH_MULTIPLATFORM
1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063
	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.

1064 1065 1066
config ARM_ERRATA_643719
	bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
	depends on CPU_V7 && SMP
1067
	default y
1068 1069 1070 1071 1072 1073 1074
	help
	  This option enables the workaround for the 643719 Cortex-A9 (prior to
	  r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
	  register returns zero when it should return one. The workaround
	  corrects this value, ensuring cache maintenance operations which use
	  it behave as intended and avoiding data corruption.

1075 1076
config ARM_ERRATA_720789
	bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1077
	depends on CPU_V7
1078 1079 1080 1081 1082 1083 1084 1085
	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.
1086 1087 1088 1089

config ARM_ERRATA_743622
	bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
	depends on CPU_V7
1090
	depends on !ARCH_MULTIPLATFORM
1091 1092
	help
	  This option enables the workaround for the 743622 Cortex-A9
1093
	  (r2p*) erratum. Under very rare conditions, a faulty
1094 1095 1096 1097 1098 1099 1100
	  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.

1101 1102
config ARM_ERRATA_751472
	bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1103
	depends on CPU_V7
1104
	depends on !ARCH_MULTIPLATFORM
1105 1106 1107 1108 1109 1110 1111
	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.

1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122
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.

1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133
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.

1134 1135
config ARM_ERRATA_364296
	bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
1136
	depends on CPU_V6
1137 1138 1139 1140 1141 1142 1143 1144 1145
	help
	  This options enables the workaround for the 364296 ARM1136
	  r0p2 erratum (possible cache data corruption with
	  hit-under-miss enabled). It sets the undocumented bit 31 in
	  the auxiliary control register and the FI bit in the control
	  register, thus disabling hit-under-miss without putting the
	  processor into full low interrupt latency mode. ARM11MPCore
	  is not affected.

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

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config 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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config ARM_ERRATA_773022
	bool "ARM errata: incorrect instructions may be executed from loop buffer"
	depends on CPU_V7
	help
	  This option enables the workaround for the 773022 Cortex-A15
	  (up to r0p4) erratum. In certain rare sequences of code, the
	  loop buffer may deliver incorrect instructions. This
	  workaround disables the loop buffer to avoid the erratum.

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endmenu

source "arch/arm/common/Kconfig"

menu "Bus support"

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.

1204
# Select ISA DMA controller support
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config ISA_DMA
	bool
1207
	select ISA_DMA_API
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1209
# Select ISA DMA interface
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config ISA_DMA_API
	bool

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config PCI
1214
	bool "PCI support" if MIGHT_HAVE_PCI
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	help
	  Find out whether you have a PCI motherboard. PCI is the name of a
	  bus system, i.e. the way the CPU talks to the other stuff inside
	  your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
	  VESA. If you have PCI, say Y, otherwise N.

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config PCI_DOMAINS
	bool
	depends on PCI

1225 1226 1227
config PCI_DOMAINS_GENERIC
	def_bool PCI_DOMAINS

1228 1229 1230 1231 1232 1233
config PCI_NANOENGINE
	bool "BSE nanoEngine PCI support"
	depends on SA1100_NANOENGINE
	help
	  Enable PCI on the BSE nanoEngine board.

1234 1235 1236
config PCI_SYSCALL
	def_bool PCI

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

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source "drivers/pci/Kconfig"

source "drivers/pcmcia/Kconfig"

endmenu

menu "Kernel Features"

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

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

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config SMP
1261
	bool "Symmetric Multi-Processing"
1262
	depends on CPU_V6K || CPU_V7
1263
	depends on GENERIC_CLOCKEVENTS
1264
	depends on HAVE_SMP
1265
	depends on MMU || ARM_MPU
1266
	select IRQ_WORK
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	help
	  This enables support for systems with more than one CPU. If you have
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	  a system with only one CPU, say N. If you have a system with more
	  than one CPU, say Y.
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	  If you say N here, the kernel will run on uni- and multiprocessor
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	  machines, but will use only one CPU of a multiprocessor machine. If
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	  you say Y here, the kernel will run on many, but not all,
	  uniprocessor machines. On a uniprocessor 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
1280
	  <http://tldp.org/HOWTO/SMP-HOWTO.html>.
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	  If you don't know what to do here, say N.

1284
config SMP_ON_UP
1285
	bool "Allow booting SMP kernel on uniprocessor systems"
1286
	depends on SMP && !XIP_KERNEL && MMU
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	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

1326
config HAVE_ARM_ARCH_TIMER
1327 1328
	bool "Architected timer support"
	depends on CPU_V7
1329
	select ARM_ARCH_TIMER
1330
	select GENERIC_CLOCKEVENTS
1331 1332 1333
	help
	  This option enables support for the ARM architected timer

1334 1335
config HAVE_ARM_TWD
	bool
1336
	select CLKSRC_OF if OF
1337 1338 1339
	help
	  This options enables support for the ARM timer and watchdog unit

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

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config MCPM_QUAD_CLUSTER
	bool
	depends on MCPM
	help
	  To avoid wasting resources unnecessarily, MCPM only supports up
	  to 2 clusters by default.
	  Platforms with 3 or 4 clusters that use MCPM must select this
	  option to allow the additional clusters to be managed.

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config BIG_LITTLE
	bool "big.LITTLE support (Experimental)"
	depends on CPU_V7 && SMP
	select MCPM
	help
	  This option enables support selections for the big.LITTLE
	  system architecture.

config BL_SWITCHER
	bool "big.LITTLE switcher support"
1367
	depends on BIG_LITTLE && MCPM && HOTPLUG_CPU && ARM_GIC
1368
	select CPU_PM
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	help
	  The big.LITTLE "switcher" provides the core functionality to
	  transparently handle transition between a cluster of A15's
	  and a cluster of A7's in a big.LITTLE system.

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config BL_SWITCHER_DUMMY_IF
	tristate "Simple big.LITTLE switcher user interface"
	depends on BL_SWITCHER && DEBUG_KERNEL
	help
	  This is a simple and dummy char dev interface to control
	  the big.LITTLE switcher core code.  It is meant for
	  debugging purposes only.

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choice
	prompt "Memory split"
1384
	depends on MMU
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	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"
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	config VMSPLIT_3G_OPT
		bool "3G/1G user/kernel split (for full 1G low memory)"
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	config VMSPLIT_2G
		bool "2G/2G user/kernel split"
	config VMSPLIT_1G
		bool "1G/3G user/kernel split"
endchoice

config PAGE_OFFSET
	hex
1404
	default PHYS_OFFSET if !MMU
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	default 0x40000000 if VMSPLIT_1G
	default 0x80000000 if VMSPLIT_2G
1407
	default 0xB0000000 if VMSPLIT_3G_OPT
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	default 0xC0000000

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

1416
config HOTPLUG_CPU
1417
	bool "Support for hot-pluggable CPUs"
1418
	depends on SMP
1419 1420 1421 1422
	help
	  Say Y here to experiment with turning CPUs off and on.  CPUs
	  can be controlled through /sys/devices/system/cpu.

1423 1424
config ARM_PSCI
	bool "Support for the ARM Power State Coordination Interface (PSCI)"
1425
	depends on HAVE_ARM_SMCCC
1426
	select ARM_PSCI_FW
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	help
	  Say Y here if you want Linux to communicate with system firmware
	  implementing the PSCI specification for CPU-centric power
	  management operations described in ARM document number ARM DEN
	  0022A ("Power State Coordination Interface System Software on
	  ARM processors").

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# 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.
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config ARCH_NR_GPIO
	int
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	default 1024 if ARCH_BRCMSTB || ARCH_SHMOBILE || ARCH_TEGRA || \
		ARCH_ZYNQ
1441 1442
	default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || \
		SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210
1443
	default 416 if ARCH_SUNXI
1444
	default 392 if ARCH_U8500
1445
	default 352 if ARCH_VT8500
1446
	default 288 if ARCH_ROCKCHIP
1447
	default 264 if MACH_H4700
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	default 0
	help
	  Maximum number of GPIOs in the system.

	  If unsure, leave the default value.

1454
source kernel/Kconfig.preempt
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config HZ_FIXED
1457
	int
1458
	default 200 if ARCH_EBSA110 || ARCH_S3C24XX || \
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		ARCH_S5PV210 || ARCH_EXYNOS4
1460
	default 128 if SOC_AT91RM9200
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	default 0
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choice
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	depends on HZ_FIXED = 0
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	prompt "Timer frequency"

config HZ_100
	bool "100 Hz"

config HZ_200
	bool "200 Hz"

config HZ_250
	bool "250 Hz"

config HZ_300
	bool "300 Hz"

config HZ_500
	bool "500 Hz"

config HZ_1000
	bool "1000 Hz"

endchoice

config HZ
	int
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	default HZ_FIXED if HZ_FIXED != 0
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	default 100 if HZ_100
	default 200 if HZ_200
	default 250 if HZ_250
	default 300 if HZ_300
	default 500 if HZ_500
	default 1000

config SCHED_HRTICK
	def_bool HIGH_RES_TIMERS
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1500
config THUMB2_KERNEL
1501
	bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
1502
	depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
1503
	default y if CPU_THUMBONLY
1504 1505
	select AEABI
	select ARM_ASM_UNIFIED
1506
	select ARM_UNWIND
1507 1508 1509 1510 1511 1512 1513
	help
	  By enabling this option, the kernel will be compiled in
	  Thumb-2 mode. A compiler/assembler that understand the unified
	  ARM-Thumb syntax is needed.

	  If unsure, say N.

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

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

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

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

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

	  Only Thumb-2 kernels are affected.

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

1545 1546 1547
config ARM_ASM_UNIFIED
	bool

1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565
config ARM_PATCH_IDIV
	bool "Runtime patch udiv/sdiv instructions into __aeabi_{u}idiv()"
	depends on CPU_32v7 && !XIP_KERNEL
	default y
	help
	  The ARM compiler inserts calls to __aeabi_idiv() and
	  __aeabi_uidiv() when it needs to perform division on signed
	  and unsigned integers. Some v7 CPUs have support for the sdiv
	  and udiv instructions that can be used to implement those
	  functions.

	  Enabling this option allows the kernel to modify itself to
	  replace the first two instructions of these library functions
	  with the sdiv or udiv plus "bx lr" instructions when the CPU
	  it is running on supports them. Typically this will be faster
	  and less power intensive than running the original library
	  code to do integer division.

1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580
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.

1581
config OABI_COMPAT
1582
	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1583
	depends on AEABI && !THUMB2_KERNEL
1584 1585 1586 1587 1588 1589 1590
	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.
1591 1592 1593 1594 1595

	  The seccomp filter system will not be available when this is
	  selected, since there is no way yet to sensibly distinguish
	  between calling conventions during filtering.

1596 1597 1598 1599
	  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
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	  at all). If in doubt say N.
1601

1602
config ARCH_HAS_HOLES_MEMORYMODEL
1603 1604
	bool

1605 1606 1607
config ARCH_SPARSEMEM_ENABLE
	bool

1608 1609 1610
config ARCH_SPARSEMEM_DEFAULT
	def_bool ARCH_SPARSEMEM_ENABLE

1611
config ARCH_SELECT_MEMORY_MODEL
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	def_bool ARCH_SPARSEMEM_ENABLE
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1614 1615 1616
config HAVE_ARCH_PFN_VALID
	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM

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config HAVE_GENERIC_RCU_GUP
	def_bool y
	depends on ARM_LPAE

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config HIGHMEM
1622 1623
	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
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	bool "Allocate 2nd-level pagetables from highmem" if EXPERT
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	depends on HIGHMEM
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	default y
1642 1643 1644 1645 1646 1647
	help
	  The VM uses one page of physical memory for each page table.
	  For systems with a lot of processes, this can use a lot of
	  precious low memory, eventually leading to low memory being
	  consumed by page tables.  Setting this option will allow
	  user-space 2nd level page tables to reside in high memory.
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1649 1650 1651
config CPU_SW_DOMAIN_PAN
	bool "Enable use of CPU domains to implement privileged no-access"
	depends on MMU && !ARM_LPAE
1652 1653
	default y
	help
1654 1655 1656 1657 1658 1659 1660 1661 1662
	  Increase kernel security by ensuring that normal kernel accesses
	  are unable to access userspace addresses.  This can help prevent
	  use-after-free bugs becoming an exploitable privilege escalation
	  by ensuring that magic values (such as LIST_POISON) will always
	  fault when dereferenced.

	  CPUs with low-vector mappings use a best-efforts implementation.
	  Their lower 1MB needs to remain accessible for the vectors, but
	  the remainder of userspace will become appropriately inaccessible.
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1664
config HW_PERF_EVENTS
1665 1666
	def_bool y
	depends on ARM_PMU
1667

1668 1669 1670 1671
config SYS_SUPPORTS_HUGETLBFS
       def_bool y
       depends on ARM_LPAE

1672 1673 1674 1675
config HAVE_ARCH_TRANSPARENT_HUGEPAGE
       def_bool y
       depends on ARM_LPAE

1676 1677 1678
config ARCH_WANT_GENERAL_HUGETLB
	def_bool y

1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693
config ARM_MODULE_PLTS
	bool "Use PLTs to allow module memory to spill over into vmalloc area"
	depends on MODULES
	help
	  Allocate PLTs when loading modules so that jumps and calls whose
	  targets are too far away for their relative offsets to be encoded
	  in the instructions themselves can be bounced via veneers in the
	  module's PLT. This allows modules to be allocated in the generic
	  vmalloc area after the dedicated module memory area has been
	  exhausted. The modules will use slightly more memory, but after
	  rounding up to page size, the actual memory footprint is usually
	  the same.

	  Say y if you are getting out of memory errors while loading modules

1694 1695
source "mm/Kconfig"

1696
config FORCE_MAX_ZONEORDER
1697
	int "Maximum zone order"
1698
	default "12" if SOC_AM33XX
1699
	default "9" if SA1111 || ARCH_EFM32
1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711
	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
1714
	depends on CPU_CP15_MMU
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	default y if !ARCH_EBSA110
1716
	select HAVE_PROC_CPU if PROC_FS
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	help
1718
	  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.

1726
config UACCESS_WITH_MEMCPY
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	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
	depends on MMU
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	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 SWIOTLB
	def_bool y

config IOMMU_HELPER
	def_bool SWIOTLB

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config PARAVIRT
	bool "Enable paravirtualization code"
	help
	  This changes the kernel so it can modify itself when it is run
	  under a hypervisor, potentially improving performance significantly
	  over full virtualization.

config PARAVIRT_TIME_ACCOUNTING
	bool "Paravirtual steal time accounting"
	select PARAVIRT
	default n
	help
	  Select this option to enable fine granularity task steal time
	  accounting. Time spent executing other tasks in parallel with
	  the current vCPU is discounted from the vCPU power. To account for
	  that, there can be a small performance impact.

	  If in doubt, say N here.

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config XEN_DOM0
	def_bool y
	depends on XEN

config XEN
1786
	bool "Xen guest support on ARM"
1787
	depends on ARM && AEABI && OF
1788
	depends on CPU_V7 && !CPU_V6
1789
	depends on !GENERIC_ATOMIC64
1790
	depends on MMU
1791
	select ARCH_DMA_ADDR_T_64BIT
1792
	select ARM_PSCI
1793
	select SWIOTLB_XEN
1794
	select PARAVIRT
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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"
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	select IRQ_DOMAIN
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	select OF
	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
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	depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR
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	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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config ARM_APPENDED_DTB
	bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
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	depends on OF
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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
1924
	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.
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endchoice
1947

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config XIP_KERNEL
	bool "Kernel Execute-In-Place from ROM"
1950
	depends on !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)"
1980
	depends on (!SMP || PM_SLEEP_SMP)
1981
	depends on !CPU_V7M
1982
	select KEXEC_CORE
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	help
	  kexec is a system call that implements the ability to shutdown your
	  current kernel, and to start another kernel.  It is like a reboot
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	  but it is independent of the system firmware.   And like a reboot
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	  you can start any kernel with it, not just Linux.

	  It is an ongoing process to be certain the hardware in a machine
	  is properly shutdown, so do not be surprised if this code does not
1991
	  initially work for you.
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config ATAGS_PROC
	bool "Export atags in procfs"
1995
	depends on ATAGS && KEXEC
1996
	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"
	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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config EFI_STUB
	bool

config EFI
	bool "UEFI runtime support"
	depends on OF && !CPU_BIG_ENDIAN && MMU && AUTO_ZRELADDR && !XIP_KERNEL
	select UCS2_STRING
	select EFI_PARAMS_FROM_FDT
	select EFI_STUB
	select EFI_ARMSTUB
	select EFI_RUNTIME_WRAPPERS
	---help---
	  This option provides support for runtime services provided
	  by UEFI firmware (such as non-volatile variables, realtime
	  clock, and platform reset). A UEFI stub is also provided to
	  allow the kernel to be booted as an EFI application. This
	  is only useful for kernels that may run on systems that have
	  UEFI firmware.

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endmenu

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menu "CPU Power Management"
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source "drivers/cpufreq/Kconfig"

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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"
2057
	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"
2069
	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)"
2081
	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"
2095
	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

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config NEON
	bool "Advanced SIMD (NEON) Extension support"
	depends on VFPv3 && CPU_V7
	help
	  Say Y to include support code for NEON, the ARMv7 Advanced SIMD
	  Extension.

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config KERNEL_MODE_NEON
	bool "Support for NEON in kernel mode"
2119
	depends on NEON && AEABI
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	help
	  Say Y to include support for NEON in kernel mode.

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endmenu

menu "Userspace binary formats"

source "fs/Kconfig.binfmt"

endmenu

menu "Power management options"

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source "kernel/power/Kconfig"
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config ARCH_SUSPEND_POSSIBLE
2136
	depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
2137
		CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
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	def_bool y

2140
config ARM_CPU_SUSPEND
2141
	def_bool PM_SLEEP || BL_SWITCHER || ARM_PSCI_FW
2142
	depends on ARCH_SUSPEND_POSSIBLE
2143

2144 2145 2146 2147 2148
config ARCH_HIBERNATION_POSSIBLE
	bool
	depends on MMU
	default y if ARCH_SUSPEND_POSSIBLE

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endmenu

2151 2152
source "net/Kconfig"

2153
source "drivers/Kconfig"
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source "drivers/firmware/Kconfig"

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source "fs/Kconfig"

source "arch/arm/Kconfig.debug"

source "security/Kconfig"

source "crypto/Kconfig"
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if CRYPTO
source "arch/arm/crypto/Kconfig"
endif
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source "lib/Kconfig"
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source "arch/arm/kvm/Kconfig"