xref: /linux/arch/arm/Kconfig (revision 7b7bf499f79de3f6c85a340c8453a78789523f85)

config ARM
	bool
	default y
	select HAVE_AOUT
	select HAVE_DMA_API_DEBUG
	select HAVE_IDE
	select HAVE_MEMBLOCK
	select RTC_LIB
	select SYS_SUPPORTS_APM_EMULATION
	select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
	select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
	select HAVE_ARCH_KGDB
	select HAVE_KPROBES if (!XIP_KERNEL && !THUMB2_KERNEL)
	select HAVE_KRETPROBES if (HAVE_KPROBES)
	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
	select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
	select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
	select HAVE_GENERIC_DMA_COHERENT
	select HAVE_KERNEL_GZIP
	select HAVE_KERNEL_LZO
	select HAVE_KERNEL_LZMA
	select HAVE_IRQ_WORK
	select HAVE_PERF_EVENTS
	select PERF_USE_VMALLOC
	select HAVE_REGS_AND_STACK_ACCESS_API
	select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
	select HAVE_C_RECORDMCOUNT
	select HAVE_GENERIC_HARDIRQS
	select HAVE_SPARSE_IRQ
	select GENERIC_IRQ_SHOW
	help
	  The ARM series is a line of low-power-consumption RISC chip designs
	  licensed by ARM Ltd and targeted at embedded applications and
	  handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
	  manufactured, but legacy ARM-based PC hardware remains popular in
	  Europe.  There is an ARM Linux project with a web page at
	  <http://www.arm.linux.org.uk/>.

config HAVE_PWM
	bool

config MIGHT_HAVE_PCI
	bool

config SYS_SUPPORTS_APM_EMULATION
	bool

config HAVE_SCHED_CLOCK
	bool

config GENERIC_GPIO
	bool

config ARCH_USES_GETTIMEOFFSET
	bool
	default n

config GENERIC_CLOCKEVENTS
	bool

config GENERIC_CLOCKEVENTS_BROADCAST
	bool
	depends on GENERIC_CLOCKEVENTS
	default y if SMP

config KTIME_SCALAR
	bool
	default y

config HAVE_TCM
	bool
	select GENERIC_ALLOCATOR

config HAVE_PROC_CPU
	bool

config NO_IOPORT
	bool

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

config MCA
	bool
	help
	  MicroChannel Architecture is found in some IBM PS/2 machines and
	  laptops.  It is a bus system similar to PCI or ISA. See
	  <file:Documentation/mca.txt> (and especially the web page given
	  there) before attempting to build an MCA bus kernel.

config STACKTRACE_SUPPORT
	bool
	default y

config HAVE_LATENCYTOP_SUPPORT
	bool
	depends on !SMP
	default y

config LOCKDEP_SUPPORT
	bool
	default y

config TRACE_IRQFLAGS_SUPPORT
	bool
	default y

config HARDIRQS_SW_RESEND
	bool
	default y

config GENERIC_IRQ_PROBE
	bool
	default y

config GENERIC_LOCKBREAK
	bool
	default y
	depends on SMP && PREEMPT

config RWSEM_GENERIC_SPINLOCK
	bool
	default y

config RWSEM_XCHGADD_ALGORITHM
	bool

config ARCH_HAS_ILOG2_U32
	bool

config ARCH_HAS_ILOG2_U64
	bool

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.

config ARCH_HAS_CPU_IDLE_WAIT
       def_bool y

config GENERIC_HWEIGHT
	bool
	default y

config GENERIC_CALIBRATE_DELAY
	bool
	default y

config ARCH_MAY_HAVE_PC_FDC
	bool

config ZONE_DMA
	bool

config NEED_DMA_MAP_STATE
       def_bool y

config GENERIC_ISA_DMA
	bool

config FIQ
	bool

config ARCH_MTD_XIP
	bool

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

config ARM_PATCH_PHYS_VIRT
	bool "Patch physical to virtual translations at runtime (EXPERIMENTAL)"
	depends on EXPERIMENTAL
	depends on !XIP_KERNEL && MMU
	depends on !ARCH_REALVIEW || !SPARSEMEM
	help
	  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.

	  This can only be used with non-XIP MMU kernels where the base
	  of physical memory is at a 16MB boundary, or theoretically 64K
	  for the MSM machine class.

config ARM_PATCH_PHYS_VIRT_16BIT
	def_bool y
	depends on ARM_PATCH_PHYS_VIRT && ARCH_MSM
	help
	  This option extends the physical to virtual translation patching
	  to allow physical memory down to a theoretical minimum of 64K
	  boundaries.

source "init/Kconfig"

source "kernel/Kconfig.freezer"

menu "System Type"

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'.

#
# The "ARM system type" choice list is ordered alphabetically by option
# text.  Please add new entries in the option alphabetic order.
#
choice
	prompt "ARM system type"
	default ARCH_VERSATILE

config ARCH_INTEGRATOR
	bool "ARM Ltd. Integrator family"
	select ARM_AMBA
	select ARCH_HAS_CPUFREQ
	select CLKDEV_LOOKUP
	select ICST
	select GENERIC_CLOCKEVENTS
	select PLAT_VERSATILE
	select PLAT_VERSATILE_FPGA_IRQ
	help
	  Support for ARM's Integrator platform.

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

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

config ARCH_VEXPRESS
	bool "ARM Ltd. Versatile Express family"
	select ARCH_WANT_OPTIONAL_GPIOLIB
	select ARM_AMBA
	select ARM_TIMER_SP804
	select CLKDEV_LOOKUP
	select GENERIC_CLOCKEVENTS
	select HAVE_CLK
	select HAVE_PATA_PLATFORM
	select ICST
	select PLAT_VERSATILE
	select PLAT_VERSATILE_CLCD
	help
	  This enables support for the ARM Ltd Versatile Express boards.

config ARCH_AT91
	bool "Atmel AT91"
	select ARCH_REQUIRE_GPIOLIB
	select HAVE_CLK
	help
	  This enables support for systems based on the Atmel AT91RM9200,
	  AT91SAM9 and AT91CAP9 processors.

config ARCH_BCMRING
	bool "Broadcom BCMRING"
	depends on MMU
	select CPU_V6
	select ARM_AMBA
	select ARM_TIMER_SP804
	select CLKDEV_LOOKUP
	select GENERIC_CLOCKEVENTS
	select ARCH_WANT_OPTIONAL_GPIOLIB
	help
	  Support for Broadcom's BCMRing platform.

config ARCH_CLPS711X
	bool "Cirrus Logic CLPS711x/EP721x-based"
	select CPU_ARM720T
	select ARCH_USES_GETTIMEOFFSET
	help
	  Support for Cirrus Logic 711x/721x based boards.

config ARCH_CNS3XXX
	bool "Cavium Networks CNS3XXX family"
	select CPU_V6
	select GENERIC_CLOCKEVENTS
	select ARM_GIC
	select MIGHT_HAVE_PCI
	select PCI_DOMAINS if PCI
	help
	  Support for Cavium Networks CNS3XXX platform.

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

config ARCH_EBSA110
	bool "EBSA-110"
	select CPU_SA110
	select ISA
	select NO_IOPORT
	select ARCH_USES_GETTIMEOFFSET
	help
	  This is an evaluation board for the StrongARM processor available
	  from Digital. It has limited hardware on-board, including an
	  Ethernet interface, two PCMCIA sockets, two serial ports and a
	  parallel port.

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

config ARCH_FOOTBRIDGE
	bool "FootBridge"
	select CPU_SA110
	select FOOTBRIDGE
	select GENERIC_CLOCKEVENTS
	help
	  Support for systems based on the DC21285 companion chip
	  ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.

config ARCH_MXC
	bool "Freescale MXC/iMX-based"
	select GENERIC_CLOCKEVENTS
	select ARCH_REQUIRE_GPIOLIB
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
	select HAVE_SCHED_CLOCK
	help
	  Support for Freescale MXC/iMX-based family of processors

config ARCH_MXS
	bool "Freescale MXS-based"
	select GENERIC_CLOCKEVENTS
	select ARCH_REQUIRE_GPIOLIB
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
	help
	  Support for Freescale MXS-based family of processors

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

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

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

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

config ARCH_IOP33X
	bool "IOP33x-based"
	depends on MMU
	select CPU_XSCALE
	select PLAT_IOP
	select PCI
	select ARCH_REQUIRE_GPIOLIB
	help
	  Support for Intel's IOP33X (XScale) family of processors.

config ARCH_IXP23XX
 	bool "IXP23XX-based"
	depends on MMU
	select CPU_XSC3
 	select PCI
	select ARCH_USES_GETTIMEOFFSET
	help
	  Support for Intel's IXP23xx (XScale) family of processors.

config ARCH_IXP2000
	bool "IXP2400/2800-based"
	depends on MMU
	select CPU_XSCALE
	select PCI
	select ARCH_USES_GETTIMEOFFSET
	help
	  Support for Intel's IXP2400/2800 (XScale) family of processors.

config ARCH_IXP4XX
	bool "IXP4xx-based"
	depends on MMU
	select CLKSRC_MMIO
	select CPU_XSCALE
	select GENERIC_GPIO
	select GENERIC_CLOCKEVENTS
	select HAVE_SCHED_CLOCK
	select MIGHT_HAVE_PCI
	select DMABOUNCE if PCI
	help
	  Support for Intel's IXP4XX (XScale) family of processors.

config ARCH_DOVE
	bool "Marvell Dove"
	select CPU_V7
	select PCI
	select ARCH_REQUIRE_GPIOLIB
	select GENERIC_CLOCKEVENTS
	select PLAT_ORION
	help
	  Support for the Marvell Dove SoC 88AP510

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

config ARCH_LOKI
	bool "Marvell Loki (88RC8480)"
	select CPU_FEROCEON
	select GENERIC_CLOCKEVENTS
	select PLAT_ORION
	help
	  Support for the Marvell Loki (88RC8480) SoC.

config ARCH_LPC32XX
	bool "NXP LPC32XX"
	select CLKSRC_MMIO
	select CPU_ARM926T
	select ARCH_REQUIRE_GPIOLIB
	select HAVE_IDE
	select ARM_AMBA
	select USB_ARCH_HAS_OHCI
	select CLKDEV_LOOKUP
	select GENERIC_TIME
	select GENERIC_CLOCKEVENTS
	help
	  Support for the NXP LPC32XX family of processors

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

config ARCH_ORION5X
	bool "Marvell Orion"
	depends on MMU
	select CPU_FEROCEON
	select PCI
	select ARCH_REQUIRE_GPIOLIB
	select GENERIC_CLOCKEVENTS
	select PLAT_ORION
	help
	  Support for the following Marvell Orion 5x series SoCs:
	  Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
	  Orion-2 (5281), Orion-1-90 (6183).

config ARCH_MMP
	bool "Marvell PXA168/910/MMP2"
	depends on MMU
	select ARCH_REQUIRE_GPIOLIB
	select CLKDEV_LOOKUP
	select GENERIC_CLOCKEVENTS
	select HAVE_SCHED_CLOCK
	select TICK_ONESHOT
	select PLAT_PXA
	select SPARSE_IRQ
	help
	  Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.

config ARCH_KS8695
	bool "Micrel/Kendin KS8695"
	select CPU_ARM922T
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_USES_GETTIMEOFFSET
	help
	  Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
	  System-on-Chip devices.

config ARCH_W90X900
	bool "Nuvoton W90X900 CPU"
	select CPU_ARM926T
	select ARCH_REQUIRE_GPIOLIB
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
	select GENERIC_CLOCKEVENTS
	help
	  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>

config ARCH_NUC93X
	bool "Nuvoton NUC93X CPU"
	select CPU_ARM926T
	select CLKDEV_LOOKUP
	help
	  Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
	  low-power and high performance MPEG-4/JPEG multimedia controller chip.

config ARCH_TEGRA
	bool "NVIDIA Tegra"
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
	select GENERIC_TIME
	select GENERIC_CLOCKEVENTS
	select GENERIC_GPIO
	select HAVE_CLK
	select HAVE_SCHED_CLOCK
	select ARCH_HAS_BARRIERS if CACHE_L2X0
	select ARCH_HAS_CPUFREQ
	help
	  This enables support for NVIDIA Tegra based systems (Tegra APX,
	  Tegra 6xx and Tegra 2 series).

config ARCH_PNX4008
	bool "Philips Nexperia PNX4008 Mobile"
	select CPU_ARM926T
	select CLKDEV_LOOKUP
	select ARCH_USES_GETTIMEOFFSET
	help
	  This enables support for Philips PNX4008 mobile platform.

config ARCH_PXA
	bool "PXA2xx/PXA3xx-based"
	depends on MMU
	select ARCH_MTD_XIP
	select ARCH_HAS_CPUFREQ
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
	select ARCH_REQUIRE_GPIOLIB
	select GENERIC_CLOCKEVENTS
	select HAVE_SCHED_CLOCK
	select TICK_ONESHOT
	select PLAT_PXA
	select SPARSE_IRQ
	help
	  Support for Intel/Marvell's PXA2xx/PXA3xx processor line.

config ARCH_MSM
	bool "Qualcomm MSM"
	select HAVE_CLK
	select GENERIC_CLOCKEVENTS
	select ARCH_REQUIRE_GPIOLIB
	select CLKDEV_LOOKUP
	help
	  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).

config ARCH_SHMOBILE
	bool "Renesas SH-Mobile / R-Mobile"
	select HAVE_CLK
	select CLKDEV_LOOKUP
	select GENERIC_CLOCKEVENTS
	select NO_IOPORT
	select SPARSE_IRQ
	select MULTI_IRQ_HANDLER
	help
	  Support for Renesas's SH-Mobile and R-Mobile ARM platforms.

config ARCH_RPC
	bool "RiscPC"
	select ARCH_ACORN
	select FIQ
	select TIMER_ACORN
	select ARCH_MAY_HAVE_PC_FDC
	select HAVE_PATA_PLATFORM
	select ISA_DMA_API
	select NO_IOPORT
	select ARCH_SPARSEMEM_ENABLE
	select ARCH_USES_GETTIMEOFFSET
	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"
	select CLKSRC_MMIO
	select CPU_SA1100
	select ISA
	select ARCH_SPARSEMEM_ENABLE
	select ARCH_MTD_XIP
	select ARCH_HAS_CPUFREQ
	select CPU_FREQ
	select GENERIC_CLOCKEVENTS
	select HAVE_CLK
	select HAVE_SCHED_CLOCK
	select TICK_ONESHOT
	select ARCH_REQUIRE_GPIOLIB
	help
	  Support for StrongARM 11x0 based boards.

config ARCH_S3C2410
	bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
	select GENERIC_GPIO
	select ARCH_HAS_CPUFREQ
	select HAVE_CLK
	select ARCH_USES_GETTIMEOFFSET
	select HAVE_S3C2410_I2C if I2C
	help
	  Samsung S3C2410X CPU 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).

	  Note, the S3C2416 and the S3C2450 are so close that they even share
	  the same SoC ID code. This means that there is no separate machine
	  directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.

config ARCH_S3C64XX
	bool "Samsung S3C64XX"
	select PLAT_SAMSUNG
	select CPU_V6
	select ARM_VIC
	select HAVE_CLK
	select NO_IOPORT
	select ARCH_USES_GETTIMEOFFSET
	select ARCH_HAS_CPUFREQ
	select ARCH_REQUIRE_GPIOLIB
	select SAMSUNG_CLKSRC
	select SAMSUNG_IRQ_VIC_TIMER
	select SAMSUNG_IRQ_UART
	select S3C_GPIO_TRACK
	select S3C_GPIO_PULL_UPDOWN
	select S3C_GPIO_CFG_S3C24XX
	select S3C_GPIO_CFG_S3C64XX
	select S3C_DEV_NAND
	select USB_ARCH_HAS_OHCI
	select SAMSUNG_GPIOLIB_4BIT
	select HAVE_S3C2410_I2C if I2C
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
	help
	  Samsung S3C64XX series based systems

config ARCH_S5P64X0
	bool "Samsung S5P6440 S5P6450"
	select CPU_V6
	select GENERIC_GPIO
	select HAVE_CLK
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
	select GENERIC_CLOCKEVENTS
	select HAVE_SCHED_CLOCK
	select HAVE_S3C2410_I2C if I2C
	select HAVE_S3C_RTC if RTC_CLASS
	help
	  Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
	  SMDK6450.

config ARCH_S5P6442
	bool "Samsung S5P6442"
	select CPU_V6
	select GENERIC_GPIO
	select HAVE_CLK
	select ARCH_USES_GETTIMEOFFSET
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
	help
	  Samsung S5P6442 CPU based systems

config ARCH_S5PC100
	bool "Samsung S5PC100"
	select GENERIC_GPIO
	select HAVE_CLK
	select CPU_V7
	select ARM_L1_CACHE_SHIFT_6
	select ARCH_USES_GETTIMEOFFSET
	select HAVE_S3C2410_I2C if I2C
	select HAVE_S3C_RTC if RTC_CLASS
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
	help
	  Samsung S5PC100 series based systems

config ARCH_S5PV210
	bool "Samsung S5PV210/S5PC110"
	select CPU_V7
	select ARCH_SPARSEMEM_ENABLE
	select GENERIC_GPIO
	select HAVE_CLK
	select ARM_L1_CACHE_SHIFT_6
	select ARCH_HAS_CPUFREQ
	select GENERIC_CLOCKEVENTS
	select HAVE_SCHED_CLOCK
	select HAVE_S3C2410_I2C if I2C
	select HAVE_S3C_RTC if RTC_CLASS
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
	help
	  Samsung S5PV210/S5PC110 series based systems

config ARCH_EXYNOS4
	bool "Samsung EXYNOS4"
	select CPU_V7
	select ARCH_SPARSEMEM_ENABLE
	select GENERIC_GPIO
	select HAVE_CLK
	select ARCH_HAS_CPUFREQ
	select GENERIC_CLOCKEVENTS
	select HAVE_S3C_RTC if RTC_CLASS
	select HAVE_S3C2410_I2C if I2C
	select HAVE_S3C2410_WATCHDOG if WATCHDOG
	help
	  Samsung EXYNOS4 series based systems

config ARCH_SHARK
	bool "Shark"
	select CPU_SA110
	select ISA
	select ISA_DMA
	select ZONE_DMA
	select PCI
	select ARCH_USES_GETTIMEOFFSET
	help
	  Support for the StrongARM based Digital DNARD machine, also known
	  as "Shark" (<http://www.shark-linux.de/shark.html>).

config ARCH_TCC_926
	bool "Telechips TCC ARM926-based systems"
	select CLKSRC_MMIO
	select CPU_ARM926T
	select HAVE_CLK
	select CLKDEV_LOOKUP
	select GENERIC_CLOCKEVENTS
	help
	  Support for Telechips TCC ARM926-based systems.

config ARCH_U300
	bool "ST-Ericsson U300 Series"
	depends on MMU
	select CLKSRC_MMIO
	select CPU_ARM926T
	select HAVE_SCHED_CLOCK
	select HAVE_TCM
	select ARM_AMBA
	select ARM_VIC
	select GENERIC_CLOCKEVENTS
	select CLKDEV_LOOKUP
	select GENERIC_GPIO
	help
	  Support for ST-Ericsson U300 series mobile platforms.

config ARCH_U8500
	bool "ST-Ericsson U8500 Series"
	select CPU_V7
	select ARM_AMBA
	select GENERIC_CLOCKEVENTS
	select CLKDEV_LOOKUP
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_HAS_CPUFREQ
	help
	  Support for ST-Ericsson's Ux500 architecture

config ARCH_NOMADIK
	bool "STMicroelectronics Nomadik"
	select ARM_AMBA
	select ARM_VIC
	select CPU_ARM926T
	select CLKDEV_LOOKUP
	select GENERIC_CLOCKEVENTS
	select ARCH_REQUIRE_GPIOLIB
	help
	  Support for the Nomadik platform by ST-Ericsson

config ARCH_DAVINCI
	bool "TI DaVinci"
	select GENERIC_CLOCKEVENTS
	select ARCH_REQUIRE_GPIOLIB
	select ZONE_DMA
	select HAVE_IDE
	select CLKDEV_LOOKUP
	select GENERIC_ALLOCATOR
	select GENERIC_IRQ_CHIP
	select ARCH_HAS_HOLES_MEMORYMODEL
	help
	  Support for TI's DaVinci platform.

config ARCH_OMAP
	bool "TI OMAP"
	select HAVE_CLK
	select ARCH_REQUIRE_GPIOLIB
	select ARCH_HAS_CPUFREQ
	select GENERIC_CLOCKEVENTS
	select HAVE_SCHED_CLOCK
	select ARCH_HAS_HOLES_MEMORYMODEL
	help
	  Support for TI's OMAP platform (OMAP1/2/3/4).

config PLAT_SPEAR
	bool "ST SPEAr"
	select ARM_AMBA
	select ARCH_REQUIRE_GPIOLIB
	select CLKDEV_LOOKUP
	select CLKSRC_MMIO
	select GENERIC_CLOCKEVENTS
	select HAVE_CLK
	help
	  Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).

config ARCH_VT8500
	bool "VIA/WonderMedia 85xx"
	select CPU_ARM926T
	select GENERIC_GPIO
	select ARCH_HAS_CPUFREQ
	select GENERIC_CLOCKEVENTS
	select ARCH_REQUIRE_GPIOLIB
	select HAVE_PWM
	help
	  Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
endchoice

#
# 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.
#
source "arch/arm/mach-at91/Kconfig"

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

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

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

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

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

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

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

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

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

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

source "arch/arm/mach-iop32x/Kconfig"

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

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

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

source "arch/arm/mach-ixp2000/Kconfig"

source "arch/arm/mach-ixp23xx/Kconfig"

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

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

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

source "arch/arm/mach-lpc32xx/Kconfig"

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

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

source "arch/arm/plat-mxc/Kconfig"

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

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

source "arch/arm/mach-nomadik/Kconfig"
source "arch/arm/plat-nomadik/Kconfig"

source "arch/arm/mach-nuc93x/Kconfig"

source "arch/arm/plat-omap/Kconfig"

source "arch/arm/mach-omap1/Kconfig"

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

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

source "arch/arm/mach-pxa/Kconfig"
source "arch/arm/plat-pxa/Kconfig"

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

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

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

source "arch/arm/plat-samsung/Kconfig"
source "arch/arm/plat-s3c24xx/Kconfig"
source "arch/arm/plat-s5p/Kconfig"

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

source "arch/arm/plat-tcc/Kconfig"

if ARCH_S3C2410
source "arch/arm/mach-s3c2400/Kconfig"
source "arch/arm/mach-s3c2410/Kconfig"
source "arch/arm/mach-s3c2412/Kconfig"
source "arch/arm/mach-s3c2416/Kconfig"
source "arch/arm/mach-s3c2440/Kconfig"
source "arch/arm/mach-s3c2443/Kconfig"
endif

if ARCH_S3C64XX
source "arch/arm/mach-s3c64xx/Kconfig"
endif

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

source "arch/arm/mach-s5p6442/Kconfig"

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

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

source "arch/arm/mach-exynos4/Kconfig"

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

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

source "arch/arm/mach-u300/Kconfig"

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

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

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

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

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

# Definitions to make life easier
config ARCH_ACORN
	bool

config PLAT_IOP
	bool
	select GENERIC_CLOCKEVENTS
	select HAVE_SCHED_CLOCK

config PLAT_ORION
	bool
	select CLKSRC_MMIO
	select GENERIC_IRQ_CHIP
	select HAVE_SCHED_CLOCK

config PLAT_PXA
	bool

config PLAT_VERSATILE
	bool

config ARM_TIMER_SP804
	bool
	select CLKSRC_MMIO

source arch/arm/mm/Kconfig

config IWMMXT
	bool "Enable iWMMXt support"
	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
	default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
	help
	  Enable support for iWMMXt context switching at run time if
	  running on a CPU that supports it.

#  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
config XSCALE_PMU
	bool
	depends on CPU_XSCALE && !XSCALE_PMU_TIMER
	default y

config CPU_HAS_PMU
	depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
		   (!ARCH_OMAP3 || OMAP3_EMU)
	default y
	bool

config MULTI_IRQ_HANDLER
	bool
	help
	  Allow each machine to specify it's own IRQ handler at run time.

if !MMU
source "arch/arm/Kconfig-nommu"
endif

config ARM_ERRATA_411920
	bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
	depends on CPU_V6 || CPU_V6K
	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.

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.

config ARM_ERRATA_458693
	bool "ARM errata: Processor deadlock when a false hazard is created"
	depends on CPU_V7
	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.

config ARM_ERRATA_460075
	bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
	depends on CPU_V7
	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.

config ARM_ERRATA_742230
	bool "ARM errata: DMB operation may be faulty"
	depends on CPU_V7 && SMP
	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.

config ARM_ERRATA_742231
	bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
	depends on CPU_V7 && SMP
	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.

config PL310_ERRATA_588369
	bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
	depends on CACHE_L2X0
	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
	   invalidated as a result of these operations.

config ARM_ERRATA_720789
	bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
	depends on CPU_V7 && SMP
	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.

config PL310_ERRATA_727915
	bool "Background Clean & Invalidate by Way operation can cause data corruption"
	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.

config ARM_ERRATA_743622
	bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
	depends on CPU_V7
	help
	  This option enables the workaround for the 743622 Cortex-A9
	  (r2p0..r2p2) erratum. Under very rare conditions, a faulty
	  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.

config ARM_ERRATA_751472
	bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
	depends on CPU_V7 && SMP
	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.

config ARM_ERRATA_753970
	bool "ARM errata: cache sync operation may be faulty"
	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.

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.

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.

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.

# Select ISA DMA controller support
config ISA_DMA
	bool
	select ISA_DMA_API

# Select ISA DMA interface
config ISA_DMA_API
	bool

config PCI
	bool "PCI support" if MIGHT_HAVE_PCI
	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.

config PCI_DOMAINS
	bool
	depends on PCI

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

config PCI_SYSCALL
	def_bool PCI

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

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

source "drivers/pci/Kconfig"

source "drivers/pcmcia/Kconfig"

endmenu

menu "Kernel Features"

source "kernel/time/Kconfig"

config SMP
	bool "Symmetric Multi-Processing"
	depends on CPU_V6K || CPU_V7
	depends on GENERIC_CLOCKEVENTS
	depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
		 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
		 ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
		 ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
	select USE_GENERIC_SMP_HELPERS
	select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
	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.

	  See also <file:Documentation/i386/IO-APIC.txt>,
	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
	  <http://tldp.org/HOWTO/SMP-HOWTO.html>.

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

config SMP_ON_UP
	bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
	depends on EXPERIMENTAL
	depends on SMP && !XIP_KERNEL
	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.

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

config HAVE_ARM_TWD
	bool
	depends on SMP
	select TICK_ONESHOT
	help
	  This options enables support for the ARM timer and watchdog unit

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

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

config HOTPLUG_CPU
	bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
	depends on SMP && HOTPLUG && EXPERIMENTAL
	depends on !ARCH_MSM
	help
	  Say Y here to experiment with turning CPUs off and on.  CPUs
	  can be controlled through /sys/devices/system/cpu.

config LOCAL_TIMERS
	bool "Use local timer interrupts"
	depends on SMP
	default y
	select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
	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.

source kernel/Kconfig.preempt

config HZ
	int
	default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
		ARCH_S5P6442 || ARCH_S5PV210 || ARCH_EXYNOS4
	default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
	default AT91_TIMER_HZ if ARCH_AT91
	default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
	default 100

config THUMB2_KERNEL
	bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
	depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
	select AEABI
	select ARM_ASM_UNIFIED
	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.

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.

config ARM_ASM_UNIFIED
	bool

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.

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

config ARCH_HAS_HOLES_MEMORYMODEL
	bool

config ARCH_SPARSEMEM_ENABLE
	bool

config ARCH_SPARSEMEM_DEFAULT
	def_bool ARCH_SPARSEMEM_ENABLE

config ARCH_SELECT_MEMORY_MODEL
	def_bool ARCH_SPARSEMEM_ENABLE

config HAVE_ARCH_PFN_VALID
	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM

config HIGHMEM
	bool "High Memory Support"
	depends on MMU
	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.

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

config HW_PERF_EVENTS
	bool "Enable hardware performance counter support for perf events"
	depends on PERF_EVENTS && CPU_HAS_PMU
	default y
	help
	  Enable hardware performance counter support for perf events. If
	  disabled, perf events will use software events only.

source "mm/Kconfig"

config FORCE_MAX_ZONEORDER
	int "Maximum zone order" if ARCH_SHMOBILE
	range 11 64 if ARCH_SHMOBILE
	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.

config LEDS
	bool "Timer and CPU usage LEDs"
	depends on ARCH_CDB89712 || ARCH_EBSA110 || \
		   ARCH_EBSA285 || ARCH_INTEGRATOR || \
		   ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
		   ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
		   ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
		   ARCH_AT91 || ARCH_DAVINCI || \
		   ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
	help
	  If you say Y here, the LEDs on your machine will be used
	  to provide useful information about your current system status.

	  If you are compiling a kernel for a NetWinder or EBSA-285, you will
	  be able to select which LEDs are active using the options below. If
	  you are compiling a kernel for the EBSA-110 or the LART however, the
	  red LED will simply flash regularly to indicate that the system is
	  still functional. It is safe to say Y here if you have a CATS
	  system, but the driver will do nothing.

config LEDS_TIMER
	bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
			    OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
			    || MACH_OMAP_PERSEUS2
	depends on LEDS
	depends on !GENERIC_CLOCKEVENTS
	default y if ARCH_EBSA110
	help
	  If you say Y here, one of the system LEDs (the green one on the
	  NetWinder, the amber one on the EBSA285, or the red one on the LART)
	  will flash regularly to indicate that the system is still
	  operational. This is mainly useful to kernel hackers who are
	  debugging unstable kernels.

	  The LART uses the same LED for both Timer LED and CPU usage LED
	  functions. You may choose to use both, but the Timer LED function
	  will overrule the CPU usage LED.

config LEDS_CPU
	bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
			!ARCH_OMAP) \
			|| OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
			|| MACH_OMAP_PERSEUS2
	depends on LEDS
	help
	  If you say Y here, the red LED will be used to give a good real
	  time indication of CPU usage, by lighting whenever the idle task
	  is not currently executing.

	  The LART uses the same LED for both Timer LED and CPU usage LED
	  functions. You may choose to use both, but the Timer LED function
	  will overrule the CPU usage LED.

config ALIGNMENT_TRAP
	bool
	depends on CPU_CP15_MMU
	default y if !ARCH_EBSA110
	select HAVE_PROC_CPU if PROC_FS
	help
	  ARM processors cannot fetch/store information which is not
	  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.

config UACCESS_WITH_MEMCPY
	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
	depends on MMU && EXPERIMENTAL
	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.

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.

config CC_STACKPROTECTOR
	bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
	depends on 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.

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

endmenu

menu "Boot options"

# 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
	  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.

	  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.

config ZBOOT_ROM_MMCIF
	bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
	depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
	help
	  Say Y here to include experimental MMCIF loading code in the
	  ROM-able zImage. With this enabled it is possible to write the
	  the ROM-able zImage kernel image to an MMC card and boot the
	  kernel straight from the reset vector. At reset the processor
	  Mask ROM will load the first part of the the ROM-able zImage
	  which in turn loads the rest the kernel image to RAM using the
	  MMCIF hardware block.

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).

choice
	prompt "Kernel command line type" if CMDLINE != ""
	default CMDLINE_FROM_BOOTLOADER

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.

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.
endchoice

config XIP_KERNEL
	bool "Kernel Execute-In-Place from ROM"
	depends on !ZBOOT_ROM
	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.

config KEXEC
	bool "Kexec system call (EXPERIMENTAL)"
	depends on EXPERIMENTAL
	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
	  but it is independent of the system firmware.   And like a reboot
	  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.

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

config CRASH_DUMP
	bool "Build kdump crash kernel (EXPERIMENTAL)"
	depends on 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

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.

endmenu

menu "CPU Power Management"

if ARCH_HAS_CPUFREQ

source "drivers/cpufreq/Kconfig"

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

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.

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

config CPU_FREQ_S3C64XX
	bool "CPUfreq support for Samsung S3C64XX CPUs"
	depends on CPU_FREQ && CPU_S3C6410

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

config CPU_FREQ_S3C24XX
	bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
	depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
	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
	bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
	depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
	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

config CPU_FREQ_S3C24XX_DEBUGFS
	bool "Export debugfs for CPUFreq"
	depends on CPU_FREQ_S3C24XX && DEBUG_FS
	help
	  Export status information via debugfs.

endif

source "drivers/cpuidle/Kconfig"

endmenu

menu "Floating point emulation"

comment "At least one emulation must be selected"

config FPE_NWFPE
	bool "NWFPE math emulation"
	depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
	---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"
	depends on FPE_NWFPE
	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)"
	depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
	---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"
	depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
	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.

config VFPv3
	bool
	depends on VFP
	default y if CPU_V7

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.

endmenu

menu "Userspace binary formats"

source "fs/Kconfig.binfmt"

config ARTHUR
	tristate "RISC OS personality"
	depends on !AEABI
	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"

source "kernel/power/Kconfig"

config ARCH_SUSPEND_POSSIBLE
	depends on !ARCH_S5P64X0 && !ARCH_S5P6442 && !ARCH_S5PC100
	depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
		CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
	def_bool y

endmenu

source "net/Kconfig"

source "drivers/Kconfig"

source "fs/Kconfig"

source "arch/arm/Kconfig.debug"

source "security/Kconfig"

source "crypto/Kconfig"

source "lib/Kconfig"