Kconfig 66.6 KB
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config ARM
	bool
	default y
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	select ARCH_BINFMT_ELF_RANDOMIZE_PIE
	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
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	select ARCH_HAVE_CUSTOM_GPIO_H
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	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
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	select ARCH_WANT_IPC_PARSE_VERSION
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	select BUILDTIME_EXTABLE_SORT if MMU
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	select CPU_PM if (SUSPEND || CPU_IDLE)
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	select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
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	select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
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	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
	select GENERIC_IRQ_PROBE
	select GENERIC_IRQ_SHOW
	select GENERIC_PCI_IOMAP
	select GENERIC_SMP_IDLE_THREAD
	select GENERIC_STRNCPY_FROM_USER
	select GENERIC_STRNLEN_USER
	select HARDIRQS_SW_RESEND
	select HAVE_AOUT
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	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
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	select HAVE_ARCH_KGDB
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	select HAVE_ARCH_SECCOMP_FILTER
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	select HAVE_ARCH_TRACEHOOK
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	select HAVE_BPF_JIT
	select HAVE_C_RECORDMCOUNT
	select HAVE_DEBUG_KMEMLEAK
	select HAVE_DMA_API_DEBUG
	select HAVE_DMA_ATTRS
	select HAVE_DMA_CONTIGUOUS if MMU
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	select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
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	select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
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	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
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	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
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	select HAVE_GENERIC_DMA_COHERENT
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	select HAVE_GENERIC_HARDIRQS
	select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
	select HAVE_IDE if PCI || ISA || PCMCIA
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	select HAVE_KERNEL_GZIP
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	select HAVE_KERNEL_LZMA
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	select HAVE_KERNEL_LZO
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	select HAVE_KERNEL_XZ
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	select HAVE_KPROBES if !XIP_KERNEL
	select HAVE_KRETPROBES if (HAVE_KPROBES)
	select HAVE_MEMBLOCK
	select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
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	select HAVE_PERF_EVENTS
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	select HAVE_REGS_AND_STACK_ACCESS_API
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	select HAVE_SYSCALL_TRACEPOINTS
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	select HAVE_UID16
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	select HAVE_VIRT_TO_BUS
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	select KTIME_SCALAR
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	select PERF_USE_VMALLOC
	select RTC_LIB
	select SYS_SUPPORTS_APM_EMULATION
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	select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
	select MODULES_USE_ELF_REL
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	select CLONE_BACKWARDS
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	select OLD_SIGSUSPEND3
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	select OLD_SIGACTION
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	help
	  The ARM series is a line of low-power-consumption RISC chip designs
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	  licensed by ARM Ltd and targeted at embedded applications and
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	  handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
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	  manufactured, but legacy ARM-based PC hardware remains popular in
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	  Europe.  There is an ARM Linux project with a web page at
	  <http://www.arm.linux.org.uk/>.

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config ARM_HAS_SG_CHAIN
	bool

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config NEED_SG_DMA_LENGTH
	bool

config ARM_DMA_USE_IOMMU
	bool
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	select ARM_HAS_SG_CHAIN
	select NEED_SG_DMA_LENGTH
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if ARM_DMA_USE_IOMMU

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

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

endif

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config HAVE_PWM
	bool

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config MIGHT_HAVE_PCI
	bool

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config SYS_SUPPORTS_APM_EMULATION
	bool

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config GENERIC_GPIO
	bool

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config HAVE_TCM
	bool
	select GENERIC_ALLOCATOR

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config HAVE_PROC_CPU
	bool

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config NO_IOPORT
	bool

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

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

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

	  Otherwise, say N.

config SBUS
	bool

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config STACKTRACE_SUPPORT
	bool
	default y

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config HAVE_LATENCYTOP_SUPPORT
	bool
	depends on !SMP
	default y

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config LOCKDEP_SUPPORT
	bool
	default y

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config TRACE_IRQFLAGS_SUPPORT
	bool
	default y

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config RWSEM_GENERIC_SPINLOCK
	bool
	default y

config RWSEM_XCHGADD_ALGORITHM
	bool

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config ARCH_HAS_ILOG2_U32
	bool

config ARCH_HAS_ILOG2_U64
	bool

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

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config GENERIC_HWEIGHT
	bool
	default y

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config GENERIC_CALIBRATE_DELAY
	bool
	default y

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config ARCH_MAY_HAVE_PC_FDC
	bool

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config ZONE_DMA
	bool

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config NEED_DMA_MAP_STATE
       def_bool y

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config ARCH_HAS_DMA_SET_COHERENT_MASK
	bool

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config GENERIC_ISA_DMA
	bool

config FIQ
	bool

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config NEED_RET_TO_USER
	bool

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config ARCH_MTD_XIP
	bool

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

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

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

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

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source "init/Kconfig"

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source "kernel/Kconfig.freezer"

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menu "System Type"

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

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

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

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

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

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config ARCH_AT91
	bool "Atmel AT91"
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	select ARCH_REQUIRE_GPIOLIB
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	select CLKDEV_LOOKUP
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	select HAVE_CLK
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	select IRQ_DOMAIN
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	select NEED_MACH_GPIO_H
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	select NEED_MACH_IO_H if PCCARD
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	select PINCTRL
	select PINCTRL_AT91 if USE_OF
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	help
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	  This enables support for systems based on Atmel
	  AT91RM9200 and AT91SAM9* processors.
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config ARCH_BCM2835
	bool "Broadcom BCM2835 family"
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	select ARCH_REQUIRE_GPIOLIB
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	select ARM_AMBA
	select ARM_ERRATA_411920
	select ARM_TIMER_SP804
	select CLKDEV_LOOKUP
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	select CLKSRC_OF
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	select COMMON_CLK
	select CPU_V6
	select GENERIC_CLOCKEVENTS
	select MULTI_IRQ_HANDLER
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	select PINCTRL
	select PINCTRL_BCM2835
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	select SPARSE_IRQ
	select USE_OF
	help
	  This enables support for the Broadcom BCM2835 SoC. This SoC is
	  use in the Raspberry Pi, and Roku 2 devices.

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

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

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

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config ARCH_SIRF
	bool "CSR SiRF"
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	select ARCH_REQUIRE_GPIOLIB
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	select AUTO_ZRELADDR
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	select COMMON_CLK
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	select GENERIC_CLOCKEVENTS
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	select GENERIC_IRQ_CHIP
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	select MIGHT_HAVE_CACHE_L2X0
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	select NO_IOPORT
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	select PINCTRL
	select PINCTRL_SIRF
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	select USE_OF
	help
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	  Support for CSR SiRFprimaII/Marco/Polo platforms
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config ARCH_EBSA110
	bool "EBSA-110"
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	select ARCH_USES_GETTIMEOFFSET
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	select CPU_SA110
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	select ISA
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	select NEED_MACH_IO_H
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	select NEED_MACH_MEMORY_H
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	select NO_IOPORT
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	help
	  This is an evaluation board for the StrongARM processor available
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	  from Digital. It has limited hardware on-board, including an
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	  Ethernet interface, two PCMCIA sockets, two serial ports and a
	  parallel port.

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config ARCH_EP93XX
	bool "EP93xx-based"
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	select ARCH_HAS_HOLES_MEMORYMODEL
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_USES_GETTIMEOFFSET
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	select ARM_AMBA
	select ARM_VIC
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	select CLKDEV_LOOKUP
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	select CPU_ARM920T
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	select NEED_MACH_MEMORY_H
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	help
	  This enables support for the Cirrus EP93xx series of CPUs.

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config ARCH_FOOTBRIDGE
	bool "FootBridge"
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	select CPU_SA110
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	select FOOTBRIDGE
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	select GENERIC_CLOCKEVENTS
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	select HAVE_IDE
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	select NEED_MACH_IO_H if !MMU
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	select NEED_MACH_MEMORY_H
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	help
	  Support for systems based on the DC21285 companion chip
	  ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
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config ARCH_MXS
	bool "Freescale MXS-based"
	select ARCH_REQUIRE_GPIOLIB
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	select CLKDEV_LOOKUP
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	select CLKSRC_MMIO
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	select COMMON_CLK
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	select GENERIC_CLOCKEVENTS
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	select HAVE_CLK_PREPARE
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	select MULTI_IRQ_HANDLER
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	select PINCTRL
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	select SPARSE_IRQ
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	select USE_OF
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	help
	  Support for Freescale MXS-based family of processors

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config ARCH_NETX
	bool "Hilscher NetX based"
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	select ARM_VIC
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	select CLKSRC_MMIO
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	select CPU_ARM926T
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	select GENERIC_CLOCKEVENTS
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	help
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	  This enables support for systems based on the Hilscher NetX Soc

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

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

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

config ARCH_IOP33X
	bool "IOP33x-based"
	depends on MMU
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	select ARCH_REQUIRE_GPIOLIB
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	select CPU_XSCALE
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	select NEED_MACH_GPIO_H
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	select NEED_RET_TO_USER
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	select PCI
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	select PLAT_IOP
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	help
	  Support for Intel's IOP33X (XScale) family of processors.
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config ARCH_IXP4XX
	bool "IXP4xx-based"
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	depends on MMU
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	select ARCH_HAS_DMA_SET_COHERENT_MASK
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	select ARCH_REQUIRE_GPIOLIB
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	select CLKSRC_MMIO
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	select CPU_XSCALE
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	select DMABOUNCE if PCI
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	select GENERIC_CLOCKEVENTS
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	select MIGHT_HAVE_PCI
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	select NEED_MACH_IO_H
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	help
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	  Support for Intel's IXP4XX (XScale) family of processors.
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config ARCH_DOVE
	bool "Marvell Dove"
	select ARCH_REQUIRE_GPIOLIB
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	select CPU_V7
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	select GENERIC_CLOCKEVENTS
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	select MIGHT_HAVE_PCI
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	select PINCTRL
	select PINCTRL_DOVE
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	select PLAT_ORION_LEGACY
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	select USB_ARCH_HAS_EHCI
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	help
	  Support for the Marvell Dove SoC 88AP510

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

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

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config ARCH_ORION5X
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	bool "Marvell Orion"
	depends on MMU
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	select ARCH_REQUIRE_GPIOLIB
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	select CPU_FEROCEON
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	select GENERIC_CLOCKEVENTS
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	select PCI
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	select PLAT_ORION_LEGACY
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	help
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	  Support for the following Marvell Orion 5x series SoCs:
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	  Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
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	  Orion-2 (5281), Orion-1-90 (6183).
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config ARCH_MMP
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	bool "Marvell PXA168/910/MMP2"
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	depends on MMU
	select ARCH_REQUIRE_GPIOLIB
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	select CLKDEV_LOOKUP
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	select GENERIC_ALLOCATOR
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	select GENERIC_CLOCKEVENTS
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	select GPIO_PXA
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	select IRQ_DOMAIN
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	select NEED_MACH_GPIO_H
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	select PINCTRL
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	select PLAT_PXA
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	select SPARSE_IRQ
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	help
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	  Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
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config ARCH_KS8695
	bool "Micrel/Kendin KS8695"
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	select ARCH_REQUIRE_GPIOLIB
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	select CLKSRC_MMIO
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	select CPU_ARM922T
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	select GENERIC_CLOCKEVENTS
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	select NEED_MACH_MEMORY_H
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	help
	  Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
	  System-on-Chip devices.

config ARCH_W90X900
	bool "Nuvoton W90X900 CPU"
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	select ARCH_REQUIRE_GPIOLIB
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	select CLKDEV_LOOKUP
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	select CLKSRC_MMIO
639
	select CPU_ARM926T
640
	select GENERIC_CLOCKEVENTS
641
	help
642 643 644 645 646 647 648
	  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>
649

650 651 652 653 654 655 656 657 658 659 660 661 662 663 664
config ARCH_LPC32XX
	bool "NXP LPC32XX"
	select ARCH_REQUIRE_GPIOLIB
	select ARM_AMBA
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
	select CPU_ARM926T
	select GENERIC_CLOCKEVENTS
	select HAVE_IDE
	select HAVE_PWM
	select USB_ARCH_HAS_OHCI
	select USE_OF
	help
	  Support for the NXP LPC32XX family of processors

665 666
config ARCH_TEGRA
	bool "NVIDIA Tegra"
667
	select ARCH_HAS_CPUFREQ
668
	select ARCH_REQUIRE_GPIOLIB
R
Russell King 已提交
669
	select CLKDEV_LOOKUP
670
	select CLKSRC_MMIO
671
	select CLKSRC_OF
672
	select COMMON_CLK
673 674
	select GENERIC_CLOCKEVENTS
	select HAVE_CLK
675
	select HAVE_SMP
676
	select MIGHT_HAVE_CACHE_L2X0
S
Stephen Warren 已提交
677
	select SPARSE_IRQ
678
	select USE_OF
679 680 681 682
	help
	  This enables support for NVIDIA Tegra based systems (Tegra APX,
	  Tegra 6xx and Tegra 2 series).

L
Linus Torvalds 已提交
683
config ARCH_PXA
E
eric miao 已提交
684
	bool "PXA2xx/PXA3xx-based"
685
	depends on MMU
686
	select ARCH_HAS_CPUFREQ
687 688 689 690
	select ARCH_MTD_XIP
	select ARCH_REQUIRE_GPIOLIB
	select ARM_CPU_SUSPEND if PM
	select AUTO_ZRELADDR
691
	select CLKDEV_LOOKUP
692
	select CLKSRC_MMIO
693
	select GENERIC_CLOCKEVENTS
694
	select GPIO_PXA
695
	select HAVE_IDE
696
	select MULTI_IRQ_HANDLER
697
	select NEED_MACH_GPIO_H
698 699
	select PLAT_PXA
	select SPARSE_IRQ
700
	help
E
eric miao 已提交
701
	  Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
L
Linus Torvalds 已提交
702

703 704
config ARCH_MSM
	bool "Qualcomm MSM"
P
Pavel Machek 已提交
705
	select ARCH_REQUIRE_GPIOLIB
S
Stephen Boyd 已提交
706
	select CLKDEV_LOOKUP
707 708
	select GENERIC_CLOCKEVENTS
	select HAVE_CLK
709
	help
710 711 712 713 714
	  Support for Qualcomm MSM/QSD based systems.  This runs on the
	  apps processor of the MSM/QSD and depends on a shared memory
	  interface to the modem processor which runs the baseband
	  stack and controls some vital subsystems
	  (clock and power control, etc).
715

716
config ARCH_SHMOBILE
717
	bool "Renesas SH-Mobile / R-Mobile"
P
Paul Mundt 已提交
718
	select CLKDEV_LOOKUP
719 720
	select GENERIC_CLOCKEVENTS
	select HAVE_CLK
721
	select HAVE_MACH_CLKDEV
722
	select HAVE_SMP
723
	select MIGHT_HAVE_CACHE_L2X0
724
	select MULTI_IRQ_HANDLER
725
	select NEED_MACH_MEMORY_H
726
	select NO_IOPORT
L
Laurent Pinchart 已提交
727
	select PINCTRL
728 729
	select PM_GENERIC_DOMAINS if PM
	select SPARSE_IRQ
730
	help
731
	  Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
732

L
Linus Torvalds 已提交
733 734 735
config ARCH_RPC
	bool "RiscPC"
	select ARCH_ACORN
736
	select ARCH_MAY_HAVE_PC_FDC
737
	select ARCH_SPARSEMEM_ENABLE
738
	select ARCH_USES_GETTIMEOFFSET
739
	select FIQ
740
	select HAVE_IDE
741 742
	select HAVE_PATA_PLATFORM
	select ISA_DMA_API
743
	select NEED_MACH_IO_H
744
	select NEED_MACH_MEMORY_H
745
	select NO_IOPORT
L
Linus Torvalds 已提交
746 747 748 749 750 751
	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"
752
	select ARCH_HAS_CPUFREQ
753 754 755 756 757
	select ARCH_MTD_XIP
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_SPARSEMEM_ENABLE
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
R
Russell King 已提交
758
	select CPU_FREQ
759
	select CPU_SA1100
760
	select GENERIC_CLOCKEVENTS
761
	select HAVE_IDE
762
	select ISA
763
	select NEED_MACH_GPIO_H
764
	select NEED_MACH_MEMORY_H
765
	select SPARSE_IRQ
766 767
	help
	  Support for StrongARM 11x0 based boards.
L
Linus Torvalds 已提交
768

769 770
config ARCH_S3C24XX
	bool "Samsung S3C24XX SoCs"
B
Ben Dooks 已提交
771
	select ARCH_HAS_CPUFREQ
772
	select ARCH_USES_GETTIMEOFFSET
773 774
	select CLKDEV_LOOKUP
	select HAVE_CLK
775
	select HAVE_S3C2410_I2C if I2C
776
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
777
	select HAVE_S3C_RTC if RTC_CLASS
778
	select NEED_MACH_GPIO_H
779
	select NEED_MACH_IO_H
L
Linus Torvalds 已提交
780
	help
781 782 783 784
	  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).
785

B
Ben Dooks 已提交
786 787
config ARCH_S3C64XX
	bool "Samsung S3C64XX"
788 789 790
	select ARCH_HAS_CPUFREQ
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_USES_GETTIMEOFFSET
791
	select ARM_VIC
792 793
	select CLKDEV_LOOKUP
	select CPU_V6
B
Ben Dooks 已提交
794
	select HAVE_CLK
795 796
	select HAVE_S3C2410_I2C if I2C
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
M
Mark Brown 已提交
797
	select HAVE_TCM
798
	select NEED_MACH_GPIO_H
799
	select NO_IOPORT
800 801 802
	select PLAT_SAMSUNG
	select S3C_DEV_NAND
	select S3C_GPIO_TRACK
803
	select SAMSUNG_CLKSRC
804
	select SAMSUNG_GPIOLIB_4BIT
805 806
	select SAMSUNG_IRQ_VIC_TIMER
	select USB_ARCH_HAS_OHCI
B
Ben Dooks 已提交
807 808 809
	help
	  Samsung S3C64XX series based systems

810 811
config ARCH_S5P64X0
	bool "Samsung S5P6440 S5P6450"
812
	select CLKDEV_LOOKUP
813
	select CLKSRC_MMIO
814
	select CPU_V6
815
	select GENERIC_CLOCKEVENTS
816
	select HAVE_CLK
817
	select HAVE_S3C2410_I2C if I2C
818
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
819
	select HAVE_S3C_RTC if RTC_CLASS
820
	select NEED_MACH_GPIO_H
821
	help
822 823
	  Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
	  SMDK6450.
824

825 826
config ARCH_S5PC100
	bool "Samsung S5PC100"
827
	select ARCH_USES_GETTIMEOFFSET
828
	select CLKDEV_LOOKUP
829
	select CPU_V7
830
	select HAVE_CLK
831
	select HAVE_S3C2410_I2C if I2C
832
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
833
	select HAVE_S3C_RTC if RTC_CLASS
834
	select NEED_MACH_GPIO_H
835
	help
836
	  Samsung S5PC100 series based systems
837

838 839
config ARCH_S5PV210
	bool "Samsung S5PV210/S5PC110"
840
	select ARCH_HAS_CPUFREQ
841
	select ARCH_HAS_HOLES_MEMORYMODEL
842
	select ARCH_SPARSEMEM_ENABLE
843
	select CLKDEV_LOOKUP
844
	select CLKSRC_MMIO
845
	select CPU_V7
846
	select GENERIC_CLOCKEVENTS
847
	select HAVE_CLK
848
	select HAVE_S3C2410_I2C if I2C
849
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
850
	select HAVE_S3C_RTC if RTC_CLASS
851
	select NEED_MACH_GPIO_H
852
	select NEED_MACH_MEMORY_H
853 854 855
	help
	  Samsung S5PV210/S5PC110 series based systems

856
config ARCH_EXYNOS
857
	bool "Samsung EXYNOS"
858
	select ARCH_HAS_CPUFREQ
859
	select ARCH_HAS_HOLES_MEMORYMODEL
860
	select ARCH_SPARSEMEM_ENABLE
861
	select CLKDEV_LOOKUP
862
	select CPU_V7
863
	select GENERIC_CLOCKEVENTS
864
	select HAVE_CLK
865
	select HAVE_S3C2410_I2C if I2C
866
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
867
	select HAVE_S3C_RTC if RTC_CLASS
868
	select NEED_MACH_GPIO_H
869
	select NEED_MACH_MEMORY_H
870
	help
871
	  Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
872

L
Linus Torvalds 已提交
873 874
config ARCH_SHARK
	bool "Shark"
875
	select ARCH_USES_GETTIMEOFFSET
876
	select CPU_SA110
877 878
	select ISA
	select ISA_DMA
879
	select NEED_MACH_MEMORY_H
880 881
	select PCI
	select ZONE_DMA
882 883 884
	help
	  Support for the StrongARM based Digital DNARD machine, also known
	  as "Shark" (<http://www.shark-linux.de/shark.html>).
L
Linus Torvalds 已提交
885

886 887 888
config ARCH_U300
	bool "ST-Ericsson U300 Series"
	depends on MMU
889
	select ARCH_REQUIRE_GPIOLIB
890
	select ARM_AMBA
891
	select ARM_PATCH_PHYS_VIRT
892
	select ARM_VIC
893
	select CLKDEV_LOOKUP
894
	select CLKSRC_MMIO
895
	select COMMON_CLK
896 897 898
	select CPU_ARM926T
	select GENERIC_CLOCKEVENTS
	select HAVE_TCM
899
	select SPARSE_IRQ
900 901 902
	help
	  Support for ST-Ericsson U300 series mobile platforms.

903 904
config ARCH_U8500
	bool "ST-Ericsson U8500 Series"
A
Arnd Bergmann 已提交
905
	depends on MMU
906 907
	select ARCH_HAS_CPUFREQ
	select ARCH_REQUIRE_GPIOLIB
908
	select ARM_AMBA
909
	select CLKDEV_LOOKUP
910 911
	select CPU_V7
	select GENERIC_CLOCKEVENTS
912
	select HAVE_SMP
913
	select MIGHT_HAVE_CACHE_L2X0
914
	select SPARSE_IRQ
915 916 917 918 919
	help
	  Support for ST-Ericsson's Ux500 architecture

config ARCH_NOMADIK
	bool "STMicroelectronics Nomadik"
920
	select ARCH_REQUIRE_GPIOLIB
921 922
	select ARM_AMBA
	select ARM_VIC
923
	select CLKSRC_NOMADIK_MTU
924
	select COMMON_CLK
925
	select CPU_ARM926T
926
	select GENERIC_CLOCKEVENTS
927
	select MIGHT_HAVE_CACHE_L2X0
928
	select USE_OF
929
	select PINCTRL
930
	select PINCTRL_STN8815
931
	select SPARSE_IRQ
932 933 934
	help
	  Support for the Nomadik platform by ST-Ericsson

935 936
config PLAT_SPEAR
	bool "ST SPEAr"
D
Deepak Sikri 已提交
937
	select ARCH_HAS_CPUFREQ
938 939 940 941 942 943 944 945 946 947
	select ARCH_REQUIRE_GPIOLIB
	select ARM_AMBA
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
	select COMMON_CLK
	select GENERIC_CLOCKEVENTS
	select HAVE_CLK
	help
	  Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).

948 949
config ARCH_DAVINCI
	bool "TI DaVinci"
950
	select ARCH_HAS_HOLES_MEMORYMODEL
951
	select ARCH_REQUIRE_GPIOLIB
952
	select CLKDEV_LOOKUP
D
David Brownell 已提交
953
	select GENERIC_ALLOCATOR
954
	select GENERIC_CLOCKEVENTS
R
Russell King 已提交
955
	select GENERIC_IRQ_CHIP
956
	select HAVE_IDE
957
	select NEED_MACH_GPIO_H
958
	select USE_OF
959
	select ZONE_DMA
960 961 962
	help
	  Support for TI's DaVinci platform.

963 964
config ARCH_OMAP1
	bool "TI OMAP1"
A
Arnd Bergmann 已提交
965
	depends on MMU
966
	select ARCH_HAS_CPUFREQ
967
	select ARCH_HAS_HOLES_MEMORYMODEL
968
	select ARCH_OMAP
969
	select ARCH_REQUIRE_GPIOLIB
970
	select CLKDEV_LOOKUP
971
	select CLKSRC_MMIO
972
	select GENERIC_CLOCKEVENTS
973
	select GENERIC_IRQ_CHIP
974
	select HAVE_CLK
975 976 977 978
	select HAVE_IDE
	select IRQ_DOMAIN
	select NEED_MACH_IO_H if PCCARD
	select NEED_MACH_MEMORY_H
979
	help
980
	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
981

L
Linus Torvalds 已提交
982 983
endchoice

R
Rob Herring 已提交
984 985 986 987 988 989 990 991
menu "Multiple platform selection"
	depends on ARCH_MULTIPLATFORM

comment "CPU Core family selection"

config ARCH_MULTI_V4
	bool "ARMv4 based platforms (FA526, StrongARM)"
	depends on !ARCH_MULTI_V6_V7
992
	select ARCH_MULTI_V4_V5
R
Rob Herring 已提交
993 994 995 996

config ARCH_MULTI_V4T
	bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
	depends on !ARCH_MULTI_V6_V7
997
	select ARCH_MULTI_V4_V5
R
Rob Herring 已提交
998 999 1000 1001

config ARCH_MULTI_V5
	bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
	depends on !ARCH_MULTI_V6_V7
1002
	select ARCH_MULTI_V4_V5
R
Rob Herring 已提交
1003 1004 1005 1006 1007 1008 1009

config ARCH_MULTI_V4_V5
	bool

config ARCH_MULTI_V6
	bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
	select ARCH_MULTI_V6_V7
1010
	select CPU_V6
R
Rob Herring 已提交
1011 1012 1013 1014 1015

config ARCH_MULTI_V7
	bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
	default y
	select ARCH_MULTI_V6_V7
1016 1017
	select ARCH_VEXPRESS
	select CPU_V7
R
Rob Herring 已提交
1018 1019 1020 1021 1022 1023 1024 1025 1026 1027

config ARCH_MULTI_V6_V7
	bool

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

endmenu

1028 1029 1030 1031 1032
#
# 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.
#
1033 1034
source "arch/arm/mach-mvebu/Kconfig"

1035 1036
source "arch/arm/mach-at91/Kconfig"

1037 1038
source "arch/arm/mach-bcm/Kconfig"

L
Linus Torvalds 已提交
1039 1040
source "arch/arm/mach-clps711x/Kconfig"

1041 1042
source "arch/arm/mach-cns3xxx/Kconfig"

1043 1044 1045 1046
source "arch/arm/mach-davinci/Kconfig"

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

1047 1048
source "arch/arm/mach-ep93xx/Kconfig"

L
Linus Torvalds 已提交
1049 1050
source "arch/arm/mach-footbridge/Kconfig"

1051 1052
source "arch/arm/mach-gemini/Kconfig"

1053 1054
source "arch/arm/mach-h720x/Kconfig"

R
Rob Herring 已提交
1055 1056
source "arch/arm/mach-highbank/Kconfig"

L
Linus Torvalds 已提交
1057 1058
source "arch/arm/mach-integrator/Kconfig"

1059 1060 1061
source "arch/arm/mach-iop32x/Kconfig"

source "arch/arm/mach-iop33x/Kconfig"
L
Linus Torvalds 已提交
1062

1063 1064
source "arch/arm/mach-iop13xx/Kconfig"

L
Linus Torvalds 已提交
1065 1066
source "arch/arm/mach-ixp4xx/Kconfig"

1067 1068 1069 1070 1071 1072
source "arch/arm/mach-kirkwood/Kconfig"

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

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

1073 1074
source "arch/arm/mach-mv78xx0/Kconfig"

S
Shawn Guo 已提交
1075
source "arch/arm/mach-imx/Kconfig"
L
Linus Torvalds 已提交
1076

1077 1078
source "arch/arm/mach-mxs/Kconfig"

1079
source "arch/arm/mach-netx/Kconfig"
1080

1081 1082
source "arch/arm/mach-nomadik/Kconfig"

1083 1084 1085
source "arch/arm/plat-omap/Kconfig"

source "arch/arm/mach-omap1/Kconfig"
L
Linus Torvalds 已提交
1086

1087 1088
source "arch/arm/mach-omap2/Kconfig"

1089
source "arch/arm/mach-orion5x/Kconfig"
1090

R
Rob Herring 已提交
1091 1092
source "arch/arm/mach-picoxcell/Kconfig"

1093 1094
source "arch/arm/mach-pxa/Kconfig"
source "arch/arm/plat-pxa/Kconfig"
1095

1096 1097 1098 1099 1100
source "arch/arm/mach-mmp/Kconfig"

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

source "arch/arm/mach-sa1100/Kconfig"
1101

1102
source "arch/arm/plat-samsung/Kconfig"
1103

R
Rob Herring 已提交
1104 1105
source "arch/arm/mach-socfpga/Kconfig"

1106
source "arch/arm/plat-spear/Kconfig"
1107

1108
source "arch/arm/mach-s3c24xx/Kconfig"
L
Linus Torvalds 已提交
1109

B
Ben Dooks 已提交
1110
if ARCH_S3C64XX
1111
source "arch/arm/mach-s3c64xx/Kconfig"
B
Ben Dooks 已提交
1112 1113
endif

1114
source "arch/arm/mach-s5p64x0/Kconfig"
1115

1116 1117
source "arch/arm/mach-s5pc100/Kconfig"

1118 1119
source "arch/arm/mach-s5pv210/Kconfig"

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

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

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

1126 1127
source "arch/arm/mach-prima2/Kconfig"

1128 1129
source "arch/arm/mach-tegra/Kconfig"

1130
source "arch/arm/mach-u300/Kconfig"
L
Linus Torvalds 已提交
1131

1132
source "arch/arm/mach-ux500/Kconfig"
L
Linus Torvalds 已提交
1133 1134 1135

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

1136
source "arch/arm/mach-vexpress/Kconfig"
1137
source "arch/arm/plat-versatile/Kconfig"
1138

1139 1140
source "arch/arm/mach-virt/Kconfig"

1141 1142
source "arch/arm/mach-vt8500/Kconfig"

1143 1144
source "arch/arm/mach-w90x900/Kconfig"

1145 1146
source "arch/arm/mach-zynq/Kconfig"

L
Linus Torvalds 已提交
1147 1148 1149 1150
# Definitions to make life easier
config ARCH_ACORN
	bool

1151 1152
config PLAT_IOP
	bool
M
Mikael Pettersson 已提交
1153
	select GENERIC_CLOCKEVENTS
1154

L
Lennert Buytenhek 已提交
1155 1156
config PLAT_ORION
	bool
1157
	select CLKSRC_MMIO
1158
	select COMMON_CLK
R
Russell King 已提交
1159
	select GENERIC_IRQ_CHIP
1160
	select IRQ_DOMAIN
L
Lennert Buytenhek 已提交
1161

1162 1163 1164 1165
config PLAT_ORION_LEGACY
	bool
	select PLAT_ORION

1166 1167 1168
config PLAT_PXA
	bool

1169 1170 1171
config PLAT_VERSATILE
	bool

1172 1173
config ARM_TIMER_SP804
	bool
1174
	select CLKSRC_MMIO
1175
	select HAVE_SCHED_CLOCK
1176

L
Linus Torvalds 已提交
1177 1178
source arch/arm/mm/Kconfig

1179 1180 1181 1182 1183
config ARM_NR_BANKS
	int
	default 16 if ARCH_EP93XX
	default 8

1184 1185
config IWMMXT
	bool "Enable iWMMXt support"
1186
	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
H
Haojian Zhuang 已提交
1187
	default y if PXA27x || PXA3xx || ARCH_MMP
1188 1189 1190 1191
	help
	  Enable support for iWMMXt context switching at run time if
	  running on a CPU that supports it.

L
Linus Torvalds 已提交
1192 1193
config XSCALE_PMU
	bool
1194
	depends on CPU_XSCALE
L
Linus Torvalds 已提交
1195 1196
	default y

1197 1198 1199 1200 1201
config MULTI_IRQ_HANDLER
	bool
	help
	  Allow each machine to specify it's own IRQ handler at run time.

1202 1203 1204 1205
if !MMU
source "arch/arm/Kconfig-nommu"
endif

1206 1207 1208 1209 1210 1211 1212 1213 1214
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.

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config ARM_ERRATA_411920
	bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1217
	depends on CPU_V6 || CPU_V6K
1218 1219 1220 1221 1222 1223
	help
	  Invalidation of the Instruction Cache operation can
	  fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
	  It does not affect the MPCore. This option enables the ARM Ltd.
	  recommended workaround.

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

1240 1241 1242
config ARM_ERRATA_458693
	bool "ARM errata: Processor deadlock when a false hazard is created"
	depends on CPU_V7
1243
	depends on !ARCH_MULTIPLATFORM
1244 1245 1246 1247 1248 1249 1250 1251 1252 1253
	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.

1254 1255 1256
config ARM_ERRATA_460075
	bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
	depends on CPU_V7
1257
	depends on !ARCH_MULTIPLATFORM
1258 1259 1260 1261 1262 1263 1264 1265 1266
	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.

1267 1268 1269
config ARM_ERRATA_742230
	bool "ARM errata: DMB operation may be faulty"
	depends on CPU_V7 && SMP
1270
	depends on !ARCH_MULTIPLATFORM
1271 1272 1273 1274 1275 1276 1277 1278 1279
	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.

1280 1281 1282
config ARM_ERRATA_742231
	bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
	depends on CPU_V7 && SMP
1283
	depends on !ARCH_MULTIPLATFORM
1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294
	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.

1295
config PL310_ERRATA_588369
1296
	bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
1297
	depends on CACHE_L2X0
1298 1299 1300 1301 1302 1303 1304 1305
	help
	   The PL310 L2 cache controller implements three types of Clean &
	   Invalidate maintenance operations: by Physical Address
	   (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
	   They are architecturally defined to behave as the execution of a
	   clean operation followed immediately by an invalidate operation,
	   both performing to the same memory location. This functionality
	   is not correctly implemented in PL310 as clean lines are not
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	   invalidated as a result of these operations.
1307 1308 1309

config ARM_ERRATA_720789
	bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1310
	depends on CPU_V7
1311 1312 1313 1314 1315 1316 1317 1318
	help
	  This option enables the workaround for the 720789 Cortex-A9 (prior to
	  r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
	  broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
	  As a consequence of this erratum, some TLB entries which should be
	  invalidated are not, resulting in an incoherency in the system page
	  tables. The workaround changes the TLB flushing routines to invalidate
	  entries regardless of the ASID.
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config PL310_ERRATA_727915
1321
	bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
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	depends on CACHE_L2X0
	help
	  PL310 implements the Clean & Invalidate by Way L2 cache maintenance
	  operation (offset 0x7FC). This operation runs in background so that
	  PL310 can handle normal accesses while it is in progress. Under very
	  rare circumstances, due to this erratum, write data can be lost when
	  PL310 treats a cacheable write transaction during a Clean &
	  Invalidate by Way operation.

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config ARM_ERRATA_743622
	bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
	depends on CPU_V7
1334
	depends on !ARCH_MULTIPLATFORM
1335 1336
	help
	  This option enables the workaround for the 743622 Cortex-A9
1337
	  (r2p*) erratum. Under very rare conditions, a faulty
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	  optimisation in the Cortex-A9 Store Buffer may lead to data
	  corruption. This workaround sets a specific bit in the diagnostic
	  register of the Cortex-A9 which disables the Store Buffer
	  optimisation, preventing the defect from occurring. This has no
	  visible impact on the overall performance or power consumption of the
	  processor.

1345 1346
config ARM_ERRATA_751472
	bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1347
	depends on CPU_V7
1348
	depends on !ARCH_MULTIPLATFORM
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	help
	  This option enables the workaround for the 751472 Cortex-A9 (prior
	  to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
	  completion of a following broadcasted operation if the second
	  operation is received by a CPU before the ICIALLUIS has completed,
	  potentially leading to corrupted entries in the cache or TLB.

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config PL310_ERRATA_753970
	bool "PL310 errata: cache sync operation may be faulty"
1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370
	depends on CACHE_PL310
	help
	  This option enables the workaround for the 753970 PL310 (r3p0) erratum.

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

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

1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392
config ARM_ERRATA_754327
	bool "ARM errata: no automatic Store Buffer drain"
	depends on CPU_V7 && SMP
	help
	  This option enables the workaround for the 754327 Cortex-A9 (prior to
	  r2p0) erratum. The Store Buffer does not have any automatic draining
	  mechanism and therefore a livelock may occur if an external agent
	  continuously polls a memory location waiting to observe an update.
	  This workaround defines cpu_relax() as smp_mb(), preventing correctly
	  written polling loops from denying visibility of updates to memory.

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

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

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

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

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endmenu

source "arch/arm/common/Kconfig"

menu "Bus support"

config ARM_AMBA
	bool

config ISA
	bool
	help
	  Find out whether you have ISA slots on your motherboard.  ISA is the
	  name of a bus system, i.e. the way the CPU talks to the other stuff
	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
	  newer boards don't support it.  If you have ISA, say Y, otherwise N.

1459
# Select ISA DMA controller support
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config ISA_DMA
	bool
1462
	select ISA_DMA_API
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1464 1465 1466 1467
config ARCH_NO_VIRT_TO_BUS
	def_bool y
	depends on !ARCH_RPC && !ARCH_NETWINDER && !ARCH_SHARK

1468
# Select ISA DMA interface
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config ISA_DMA_API
	bool

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config PCI
1473
	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.

1480 1481 1482 1483
config PCI_DOMAINS
	bool
	depends on PCI

1484 1485 1486 1487 1488 1489
config PCI_NANOENGINE
	bool "BSE nanoEngine PCI support"
	depends on SA1100_NANOENGINE
	help
	  Enable PCI on the BSE nanoEngine board.

1490 1491 1492
config PCI_SYSCALL
	def_bool PCI

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

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

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source "drivers/pci/Kconfig"

source "drivers/pcmcia/Kconfig"

endmenu

menu "Kernel Features"

1513 1514 1515 1516 1517 1518 1519 1520 1521
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
1523
	bool "Symmetric Multi-Processing"
1524
	depends on CPU_V6K || CPU_V7
1525
	depends on GENERIC_CLOCKEVENTS
1526
	depends on HAVE_SMP
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	depends on MMU
1528
	select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
1529
	select USE_GENERIC_SMP_HELPERS
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	help
	  This enables support for systems with more than one CPU. If you have
	  a system with only one CPU, like most personal computers, say N. If
	  you have a system with more than one CPU, say Y.

	  If you say N here, the kernel will run on single and multiprocessor
	  machines, but will use only one CPU of a multiprocessor machine. If
	  you say Y here, the kernel will run on many, but not all, single
	  processor machines. On a single processor machine, the kernel will
	  run faster if you say N here.

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	  See also <file:Documentation/x86/i386/IO-APIC.txt>,
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	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1543
	  <http://tldp.org/HOWTO/SMP-HOWTO.html>.
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	  If you don't know what to do here, say N.

1547 1548
config SMP_ON_UP
	bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1549
	depends on SMP && !XIP_KERNEL
1550 1551 1552 1553 1554 1555 1556 1557 1558
	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.

1584 1585 1586 1587 1588
config HAVE_ARM_SCU
	bool
	help
	  This option enables support for the ARM system coherency unit

1589
config HAVE_ARM_ARCH_TIMER
1590 1591
	bool "Architected timer support"
	depends on CPU_V7
1592
	select ARM_ARCH_TIMER
1593 1594 1595
	help
	  This option enables support for the ARM architected timer

1596 1597 1598 1599 1600 1601
config HAVE_ARM_TWD
	bool
	depends on SMP
	help
	  This options enables support for the ARM timer and watchdog unit

1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624
choice
	prompt "Memory split"
	default VMSPLIT_3G
	help
	  Select the desired split between kernel and user memory.

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

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

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

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

1631
config HOTPLUG_CPU
1632 1633
	bool "Support for hot-pluggable CPUs"
	depends on SMP && HOTPLUG
1634 1635 1636 1637
	help
	  Say Y here to experiment with turning CPUs off and on.  CPUs
	  can be controlled through /sys/devices/system/cpu.

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config ARM_PSCI
	bool "Support for the ARM Power State Coordination Interface (PSCI)"
	depends on CPU_V7
	help
	  Say Y here if you want Linux to communicate with system firmware
	  implementing the PSCI specification for CPU-centric power
	  management operations described in ARM document number ARM DEN
	  0022A ("Power State Coordination Interface System Software on
	  ARM processors").

1648 1649
config LOCAL_TIMERS
	bool "Use local timer interrupts"
1650
	depends on SMP
1651
	default y
1652
	select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
1653 1654 1655 1656 1657 1658
	help
	  Enable support for local timers on SMP platforms, rather then the
	  legacy IPI broadcast method.  Local timers allows the system
	  accounting to be spread across the timer interval, preventing a
	  "thundering herd" at every timer tick.

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# 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.
1662 1663
config ARCH_NR_GPIO
	int
1664
	default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
1665
	default 512 if SOC_OMAP5
1666
	default 355 if ARCH_U8500
1667
	default 288 if ARCH_VT8500 || ARCH_SUNXI
1668
	default 264 if MACH_H4700
1669 1670 1671 1672 1673 1674
	default 0
	help
	  Maximum number of GPIOs in the system.

	  If unsure, leave the default value.

1675
source kernel/Kconfig.preempt
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1677 1678
config HZ
	int
1679
	default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
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		ARCH_S5PV210 || ARCH_EXYNOS4
1681
	default AT91_TIMER_HZ if ARCH_AT91
1682
	default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1683 1684
	default 100

1685 1686 1687
config SCHED_HRTICK
	def_bool HIGH_RES_TIMERS

1688
config THUMB2_KERNEL
1689 1690
	bool "Compile the kernel in Thumb-2 mode"
	depends on CPU_V7 && !CPU_V6 && !CPU_V6K
1691 1692
	select AEABI
	select ARM_ASM_UNIFIED
1693
	select ARM_UNWIND
1694 1695 1696 1697 1698 1699 1700
	help
	  By enabling this option, the kernel will be compiled in
	  Thumb-2 mode. A compiler/assembler that understand the unified
	  ARM-Thumb syntax is needed.

	  If unsure, say N.

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

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

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

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

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

	  Only Thumb-2 kernels are affected.

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

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config ARM_ASM_UNIFIED
	bool

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config AEABI
	bool "Use the ARM EABI to compile the kernel"
	help
	  This option allows for the kernel to be compiled using the latest
	  ARM ABI (aka EABI).  This is only useful if you are using a user
	  space environment that is also compiled with EABI.

	  Since there are major incompatibilities between the legacy ABI and
	  EABI, especially with regard to structure member alignment, this
	  option also changes the kernel syscall calling convention to
	  disambiguate both ABIs and allow for backward compatibility support
	  (selected with CONFIG_OABI_COMPAT).

	  To use this you need GCC version 4.0.0 or later.

1750
config OABI_COMPAT
1751
	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1752
	depends on AEABI && !THUMB2_KERNEL
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	default y
	help
	  This option preserves the old syscall interface along with the
	  new (ARM EABI) one. It also provides a compatibility layer to
	  intercept syscalls that have structure arguments which layout
	  in memory differs between the legacy ABI and the new ARM EABI
	  (only for non "thumb" binaries). This option adds a tiny
	  overhead to all syscalls and produces a slightly larger kernel.
	  If you know you'll be using only pure EABI user space then you
	  can say N here. If this option is not selected and you attempt
	  to execute a legacy ABI binary then the result will be
	  UNPREDICTABLE (in fact it can be predicted that it won't work
	  at all). If in doubt say Y.

1767
config ARCH_HAS_HOLES_MEMORYMODEL
1768 1769
	bool

1770 1771 1772
config ARCH_SPARSEMEM_ENABLE
	bool

1773 1774 1775
config ARCH_SPARSEMEM_DEFAULT
	def_bool ARCH_SPARSEMEM_ENABLE

1776
config ARCH_SELECT_MEMORY_MODEL
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	def_bool ARCH_SPARSEMEM_ENABLE
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1779 1780 1781
config HAVE_ARCH_PFN_VALID
	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM

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config HIGHMEM
1783 1784
	bool "High Memory Support"
	depends on MMU
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	help
	  The address space of ARM processors is only 4 Gigabytes large
	  and it has to accommodate user address space, kernel address
	  space as well as some memory mapped IO. That means that, if you
	  have a large amount of physical memory and/or IO, not all of the
	  memory can be "permanently mapped" by the kernel. The physical
	  memory that is not permanently mapped is called "high memory".

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

	  If unsure, say n.

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config HIGHPTE
	bool "Allocate 2nd-level pagetables from highmem"
	depends on HIGHMEM

1803 1804
config HW_PERF_EVENTS
	bool "Enable hardware performance counter support for perf events"
1805
	depends on PERF_EVENTS
1806 1807 1808 1809 1810
	default y
	help
	  Enable hardware performance counter support for perf events. If
	  disabled, perf events will use software events only.

1811 1812
source "mm/Kconfig"

1813 1814 1815
config FORCE_MAX_ZONEORDER
	int "Maximum zone order" if ARCH_SHMOBILE
	range 11 64 if ARCH_SHMOBILE
1816
	default "12" if SOC_AM33XX
1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829
	default "9" if SA1111
	default "11"
	help
	  The kernel memory allocator divides physically contiguous memory
	  blocks into "zones", where each zone is a power of two number of
	  pages.  This option selects the largest power of two that the kernel
	  keeps in the memory allocator.  If you need to allocate very large
	  blocks of physically contiguous memory, then you may need to
	  increase this value.

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

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config ALIGNMENT_TRAP
	bool
1832
	depends on CPU_CP15_MMU
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	default y if !ARCH_EBSA110
1834
	select HAVE_PROC_CPU if PROC_FS
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	help
1836
	  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.

1844
config UACCESS_WITH_MEMCPY
1845 1846
	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
	depends on MMU
1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859
	default y if CPU_FEROCEON
	help
	  Implement faster copy_to_user and clear_user methods for CPU
	  cores where a 8-word STM instruction give significantly higher
	  memory write throughput than a sequence of individual 32bit stores.

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

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

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

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

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config XEN_DOM0
	def_bool y
	depends on XEN

config XEN
	bool "Xen guest support on ARM (EXPERIMENTAL)"
1892
	depends on ARM && OF
1893
	depends on CPU_V7 && !CPU_V6
1894 1895 1896
	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"
1903
	select IRQ_DOMAIN
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	select OF
	select OF_EARLY_FLATTREE
	help
	  Include support for flattened device tree machine descriptions.

1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925
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
1943 1944 1945 1946 1947 1948
	  The base address of an area of read/write memory in the target
	  for the ROM-able zImage which must be available while the
	  decompressor is running. It must be large enough to hold the
	  entire decompressed kernel plus an additional 128 KiB.
	  Platforms which normally make use of ROM-able zImage formats
	  normally set this to a suitable value in their defconfig file.
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	  If ZBOOT_ROM is not enabled, this has no effect.

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

1959 1960
choice
	prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1961
	depends on ZBOOT_ROM && ARCH_SH7372
1962 1963 1964
	default ZBOOT_ROM_NONE
	help
	  Include experimental SD/MMC loading code in the ROM-able zImage.
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	  With this enabled it is possible to write the ROM-able zImage
1966 1967
	  kernel image to an MMC or SD card and boot the kernel straight
	  from the reset vector. At reset the processor Mask ROM will load
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	  the first part of the ROM-able zImage which in turn loads the
1969 1970 1971 1972 1973 1974 1975
	  rest the kernel image to RAM.

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

1976 1977 1978
config ZBOOT_ROM_MMCIF
	bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
	help
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	  Load image from MMCIF hardware block.

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

endchoice
1987

1988 1989
config ARM_APPENDED_DTB
	bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
1990
	depends on OF && !ZBOOT_ROM
1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007
	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.

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
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.

2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038
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).

2049 2050 2051
choice
	prompt "Kernel command line type" if CMDLINE != ""
	default CMDLINE_FROM_BOOTLOADER
2052
	depends on ATAGS
2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066

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.

2067 2068 2069 2070 2071 2072 2073
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.
2074
endchoice
2075

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config XIP_KERNEL
	bool "Kernel Execute-In-Place from ROM"
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	depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
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	help
	  Execute-In-Place allows the kernel to run from non-volatile storage
	  directly addressable by the CPU, such as NOR flash. This saves RAM
	  space since the text section of the kernel is not loaded from flash
	  to RAM.  Read-write sections, such as the data section and stack,
	  are still copied to RAM.  The XIP kernel is not compressed since
	  it has to run directly from flash, so it will take more space to
	  store it.  The flash address used to link the kernel object files,
	  and for storing it, is configuration dependent. Therefore, if you
	  say Y here, you must know the proper physical address where to
	  store the kernel image depending on your own flash memory usage.

	  Also note that the make target becomes "make xipImage" rather than
	  "make zImage" or "make Image".  The final kernel binary to put in
	  ROM memory will be arch/arm/boot/xipImage.

	  If unsure, say N.

config XIP_PHYS_ADDR
	hex "XIP Kernel Physical Location"
	depends on XIP_KERNEL
	default "0x00080000"
	help
	  This is the physical address in your flash memory the kernel will
	  be linked for and stored to.  This address is dependent on your
	  own flash usage.

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config KEXEC
	bool "Kexec system call (EXPERIMENTAL)"
2108
	depends on (!SMP || HOTPLUG_CPU)
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	help
	  kexec is a system call that implements the ability to shutdown your
	  current kernel, and to start another kernel.  It is like a reboot
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	  but it is independent of the system firmware.   And like a reboot
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	  you can start any kernel with it, not just Linux.

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

2120 2121
config ATAGS_PROC
	bool "Export atags in procfs"
2122
	depends on ATAGS && KEXEC
2123
	default y
2124 2125 2126 2127
	help
	  Should the atags used to boot the kernel be exported in an "atags"
	  file in procfs. Useful with kexec.

2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139
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

2140 2141 2142 2143 2144 2145 2146 2147 2148 2149
config AUTO_ZRELADDR
	bool "Auto calculation of the decompressed kernel image address"
	depends on !ZBOOT_ROM && !ARCH_U300
	help
	  ZRELADDR is the physical address where the decompressed kernel
	  image will be placed. If AUTO_ZRELADDR is selected, the address
	  will be determined at run-time by masking the current IP with
	  0xf8000000. This assumes the zImage being placed in the first 128MB
	  from start of memory.

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endmenu

2152
menu "CPU Power Management"
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2153

2154
if ARCH_HAS_CPUFREQ
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2155 2156 2157

source "drivers/cpufreq/Kconfig"

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config CPU_FREQ_IMX
	tristate "CPUfreq driver for i.MX CPUs"
	depends on ARCH_MXC && CPU_FREQ
2161
	select CPU_FREQ_TABLE
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	help
	  This enables the CPUfreq driver for i.MX CPUs.

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config CPU_FREQ_SA1100
	bool

config CPU_FREQ_SA1110
	bool

config CPU_FREQ_INTEGRATOR
	tristate "CPUfreq driver for ARM Integrator CPUs"
	depends on ARCH_INTEGRATOR && CPU_FREQ
	default y
	help
	  This enables the CPUfreq driver for ARM Integrator CPUs.

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

	  If in doubt, say Y.

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config CPU_FREQ_PXA
	bool
	depends on CPU_FREQ && ARCH_PXA && PXA25x
	default y
	select CPU_FREQ_DEFAULT_GOV_USERSPACE
2187
	select CPU_FREQ_TABLE
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2188

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

config CPU_FREQ_S3C24XX
2195
	bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
2196
	depends on ARCH_S3C24XX && CPU_FREQ
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	select CPU_FREQ_S3C
	help
	  This enables the CPUfreq driver for the Samsung S3C24XX family
	  of CPUs.

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

	  If in doubt, say N.

config CPU_FREQ_S3C24XX_PLL
2207
	bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
2208
	depends on CPU_FREQ_S3C24XX
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	help
	  Compile in support for changing the PLL frequency from the
	  S3C24XX series CPUfreq driver. The PLL takes time to settle
	  after a frequency change, so by default it is not enabled.

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

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

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

2229 2230 2231 2232 2233 2234
config CPU_FREQ_S3C24XX_DEBUGFS
	bool "Export debugfs for CPUFreq"
	depends on CPU_FREQ_S3C24XX && DEBUG_FS
	help
	  Export status information via debugfs.

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endif

2237 2238 2239 2240
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"
2247
	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"
2259
	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)"
2271
	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"
2285
	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

2300 2301 2302 2303 2304 2305 2306
config NEON
	bool "Advanced SIMD (NEON) Extension support"
	depends on VFPv3 && CPU_V7
	help
	  Say Y to include support code for NEON, the ARMv7 Advanced SIMD
	  Extension.

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endmenu

menu "Userspace binary formats"

source "fs/Kconfig.binfmt"

config ARTHUR
	tristate "RISC OS personality"
2315
	depends on !AEABI
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	help
	  Say Y here to include the kernel code necessary if you want to run
	  Acorn RISC OS/Arthur binaries under Linux. This code is still very
	  experimental; if this sounds frightening, say N and sleep in peace.
	  You can also say M here to compile this support as a module (which
	  will be called arthur).

endmenu

menu "Power management options"

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source "kernel/power/Kconfig"
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2328

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config ARCH_SUSPEND_POSSIBLE
2330
	depends on !ARCH_S5PC100
2331
	depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
2332
		CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
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	def_bool y

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config ARM_CPU_SUSPEND
	def_bool PM_SLEEP

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endmenu

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source "net/Kconfig"

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

source "arch/arm/Kconfig.debug"

source "security/Kconfig"

source "crypto/Kconfig"

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