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- #
- # For a description of the syntax of this configuration file,
- # see Documentation/kbuild/kconfig-language.txt.
- #
- mainmenu "Linux Kernel Configuration"
- config ARM
- bool
- default y
- select HAVE_AOUT
- select HAVE_IDE
- select RTC_LIB
- select SYS_SUPPORTS_APM_EMULATION
- select HAVE_OPROFILE
- select HAVE_ARCH_KGDB
- select HAVE_KPROBES if (!XIP_KERNEL)
- select HAVE_KRETPROBES if (HAVE_KPROBES)
- select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
- select HAVE_GENERIC_DMA_COHERENT
- 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 SYS_SUPPORTS_APM_EMULATION
- bool
- config GENERIC_GPIO
- bool
- config GENERIC_TIME
- bool
- config GENERIC_CLOCKEVENTS
- bool
- config GENERIC_CLOCKEVENTS_BROADCAST
- bool
- depends on GENERIC_CLOCKEVENTS
- default y if SMP && !LOCAL_TIMERS
- config HAVE_TCM
- bool
- select GENERIC_ALLOCATOR
- 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 GENERIC_HARDIRQS
- bool
- default y
- 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 GENERIC_HWEIGHT
- bool
- default y
- config GENERIC_CALIBRATE_DELAY
- bool
- default y
- config ARCH_MAY_HAVE_PC_FDC
- bool
- config ZONE_DMA
- bool
- config GENERIC_ISA_DMA
- bool
- config FIQ
- bool
- config ARCH_MTD_XIP
- bool
- config GENERIC_HARDIRQS_NO__DO_IRQ
- def_bool y
- if OPROFILE
- config OPROFILE_ARMV6
- def_bool y
- depends on CPU_V6 && !SMP
- select OPROFILE_ARM11_CORE
- config OPROFILE_MPCORE
- def_bool y
- depends on CPU_V6 && SMP
- select OPROFILE_ARM11_CORE
- config OPROFILE_ARM11_CORE
- bool
- config OPROFILE_ARMV7
- def_bool y
- depends on CPU_V7 && !SMP
- bool
- endif
- 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.
- 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'.
- choice
- prompt "ARM system type"
- default ARCH_VERSATILE
- config ARCH_AAEC2000
- bool "Agilent AAEC-2000 based"
- select CPU_ARM920T
- select ARM_AMBA
- select HAVE_CLK
- help
- This enables support for systems based on the Agilent AAEC-2000
- config ARCH_INTEGRATOR
- bool "ARM Ltd. Integrator family"
- select ARM_AMBA
- select ARCH_HAS_CPUFREQ
- select HAVE_CLK
- select COMMON_CLKDEV
- select ICST525
- help
- Support for ARM's Integrator platform.
- config ARCH_REALVIEW
- bool "ARM Ltd. RealView family"
- select ARM_AMBA
- select HAVE_CLK
- select COMMON_CLKDEV
- select ICST307
- select GENERIC_TIME
- select GENERIC_CLOCKEVENTS
- select ARCH_WANT_OPTIONAL_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 HAVE_CLK
- select COMMON_CLKDEV
- select ICST307
- select GENERIC_TIME
- select GENERIC_CLOCKEVENTS
- select ARCH_WANT_OPTIONAL_GPIOLIB
- help
- This enables support for ARM Ltd Versatile board.
- config ARCH_AT91
- bool "Atmel AT91"
- select GENERIC_GPIO
- select ARCH_REQUIRE_GPIOLIB
- select HAVE_CLK
- help
- This enables support for systems based on the Atmel AT91RM9200,
- AT91SAM9 and AT91CAP9 processors.
- config ARCH_CLPS711X
- bool "Cirrus Logic CLPS711x/EP721x-based"
- select CPU_ARM720T
- help
- Support for Cirrus Logic 711x/721x based boards.
- config ARCH_GEMINI
- bool "Cortina Systems Gemini"
- select CPU_FA526
- select GENERIC_GPIO
- select ARCH_REQUIRE_GPIOLIB
- help
- Support for the Cortina Systems Gemini family SoCs
- config ARCH_EBSA110
- bool "EBSA-110"
- select CPU_SA110
- select ISA
- select NO_IOPORT
- 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 GENERIC_GPIO
- select HAVE_CLK
- select COMMON_CLKDEV
- select ARCH_REQUIRE_GPIOLIB
- select ARCH_HAS_HOLES_MEMORYMODEL
- help
- This enables support for the Cirrus EP93xx series of CPUs.
- config ARCH_FOOTBRIDGE
- bool "FootBridge"
- select CPU_SA110
- select FOOTBRIDGE
- 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_TIME
- select GENERIC_CLOCKEVENTS
- select ARCH_MTD_XIP
- select GENERIC_GPIO
- select ARCH_REQUIRE_GPIOLIB
- select HAVE_CLK
- help
- Support for Freescale MXC/iMX-based family of processors
- config ARCH_STMP3XXX
- bool "Freescale STMP3xxx"
- select CPU_ARM926T
- select HAVE_CLK
- select COMMON_CLKDEV
- select ARCH_REQUIRE_GPIOLIB
- select GENERIC_TIME
- select GENERIC_CLOCKEVENTS
- select GENERIC_GPIO
- select USB_ARCH_HAS_EHCI
- help
- Support for systems based on the Freescale 3xxx CPUs.
- config ARCH_NETX
- bool "Hilscher NetX based"
- select CPU_ARM926T
- select ARM_VIC
- select GENERIC_CLOCKEVENTS
- select GENERIC_TIME
- 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
- help
- This enables support for systems based on the Hynix HMS720x
- config ARCH_NOMADIK
- bool "STMicroelectronics Nomadik"
- select ARM_AMBA
- select ARM_VIC
- select CPU_ARM926T
- select HAVE_CLK
- select COMMON_CLKDEV
- select GENERIC_TIME
- select GENERIC_CLOCKEVENTS
- select GENERIC_GPIO
- select ARCH_REQUIRE_GPIOLIB
- help
- Support for the Nomadik platform by ST-Ericsson
- 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 GENERIC_GPIO
- 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 GENERIC_GPIO
- 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
- 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
- help
- Support for Intel's IXP2400/2800 (XScale) family of processors.
- config ARCH_IXP4XX
- bool "IXP4xx-based"
- depends on MMU
- select CPU_XSCALE
- select GENERIC_GPIO
- select GENERIC_TIME
- select GENERIC_CLOCKEVENTS
- select DMABOUNCE if PCI
- help
- Support for Intel's IXP4XX (XScale) family of processors.
- config ARCH_L7200
- bool "LinkUp-L7200"
- select CPU_ARM720T
- select FIQ
- help
- Say Y here if you intend to run this kernel on a LinkUp Systems
- L7200 Software Development Board which uses an ARM720T processor.
- Information on this board can be obtained at:
- <http://www.linkupsys.com/>
- If you have any questions or comments about the Linux kernel port
- to this board, send e-mail to <sjhill@cotw.com>.
- config ARCH_KIRKWOOD
- bool "Marvell Kirkwood"
- select CPU_FEROCEON
- select PCI
- select GENERIC_GPIO
- select ARCH_REQUIRE_GPIOLIB
- select GENERIC_TIME
- 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_TIME
- select GENERIC_CLOCKEVENTS
- select PLAT_ORION
- help
- Support for the Marvell Loki (88RC8480) SoC.
- config ARCH_MV78XX0
- bool "Marvell MV78xx0"
- select CPU_FEROCEON
- select PCI
- select GENERIC_GPIO
- select ARCH_REQUIRE_GPIOLIB
- select GENERIC_TIME
- 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 GENERIC_GPIO
- select ARCH_REQUIRE_GPIOLIB
- select GENERIC_TIME
- 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"
- depends on MMU
- select GENERIC_GPIO
- select ARCH_REQUIRE_GPIOLIB
- select HAVE_CLK
- select COMMON_CLKDEV
- select GENERIC_TIME
- select GENERIC_CLOCKEVENTS
- select TICK_ONESHOT
- select PLAT_PXA
- help
- Support for Marvell's PXA168/910 processor line.
- config ARCH_KS8695
- bool "Micrel/Kendin KS8695"
- select CPU_ARM922T
- select GENERIC_GPIO
- select ARCH_REQUIRE_GPIOLIB
- help
- Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
- System-on-Chip devices.
- config ARCH_NS9XXX
- bool "NetSilicon NS9xxx"
- select CPU_ARM926T
- select GENERIC_GPIO
- select GENERIC_TIME
- select GENERIC_CLOCKEVENTS
- select HAVE_CLK
- help
- Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
- System.
- <http://www.digi.com/products/microprocessors/index.jsp>
- config ARCH_W90X900
- bool "Nuvoton W90X900 CPU"
- select CPU_ARM926T
- select ARCH_REQUIRE_GPIOLIB
- select GENERIC_GPIO
- select HAVE_CLK
- select COMMON_CLKDEV
- select GENERIC_TIME
- 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_PNX4008
- bool "Philips Nexperia PNX4008 Mobile"
- select CPU_ARM926T
- select HAVE_CLK
- 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 GENERIC_GPIO
- select HAVE_CLK
- select COMMON_CLKDEV
- select ARCH_REQUIRE_GPIOLIB
- select GENERIC_TIME
- select GENERIC_CLOCKEVENTS
- select TICK_ONESHOT
- select PLAT_PXA
- help
- Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
- config ARCH_MSM
- bool "Qualcomm MSM"
- select CPU_V6
- select GENERIC_TIME
- select GENERIC_CLOCKEVENTS
- help
- Support for Qualcomm MSM7K based systems. This runs on the ARM11
- apps processor of the MSM7K and depends on a shared memory
- interface to the ARM9 modem processor which runs the baseband stack
- and controls some vital subsystems (clock and power control, etc).
- 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
- 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 CPU_SA1100
- select ISA
- select ARCH_SPARSEMEM_ENABLE
- select ARCH_MTD_XIP
- select ARCH_HAS_CPUFREQ
- select GENERIC_GPIO
- select GENERIC_TIME
- select GENERIC_CLOCKEVENTS
- select HAVE_CLK
- select TICK_ONESHOT
- select ARCH_REQUIRE_GPIOLIB
- help
- Support for StrongARM 11x0 based boards.
- config ARCH_S3C2410
- bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
- select GENERIC_GPIO
- select ARCH_HAS_CPUFREQ
- select HAVE_CLK
- 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).
- config ARCH_S3C64XX
- bool "Samsung S3C64XX"
- select GENERIC_GPIO
- select HAVE_CLK
- select ARCH_HAS_CPUFREQ
- help
- Samsung S3C64XX series based systems
- config ARCH_S5PC1XX
- bool "Samsung S5PC1XX"
- select GENERIC_GPIO
- select HAVE_CLK
- select CPU_V7
- help
- Samsung S5PC1XX series based systems
- config ARCH_SHARK
- bool "Shark"
- select CPU_SA110
- select ISA
- select ISA_DMA
- select ZONE_DMA
- select PCI
- help
- Support for the StrongARM based Digital DNARD machine, also known
- as "Shark" (<http://www.shark-linux.de/shark.html>).
- config ARCH_LH7A40X
- bool "Sharp LH7A40X"
- select CPU_ARM922T
- select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
- select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
- help
- Say Y here for systems based on one of the Sharp LH7A40X
- System on a Chip processors. These CPUs include an ARM922T
- core with a wide array of integrated devices for
- hand-held and low-power applications.
- config ARCH_U300
- bool "ST-Ericsson U300 Series"
- depends on MMU
- select CPU_ARM926T
- select HAVE_TCM
- select ARM_AMBA
- select ARM_VIC
- select GENERIC_TIME
- select GENERIC_CLOCKEVENTS
- select HAVE_CLK
- select COMMON_CLKDEV
- select GENERIC_GPIO
- help
- Support for ST-Ericsson U300 series mobile platforms.
- config ARCH_DAVINCI
- bool "TI DaVinci"
- select CPU_ARM926T
- select GENERIC_TIME
- select GENERIC_CLOCKEVENTS
- select GENERIC_GPIO
- select ARCH_REQUIRE_GPIOLIB
- select HAVE_CLK
- select ZONE_DMA
- select HAVE_IDE
- select COMMON_CLKDEV
- select GENERIC_ALLOCATOR
- help
- Support for TI's DaVinci platform.
- config ARCH_OMAP
- bool "TI OMAP"
- select GENERIC_GPIO
- select HAVE_CLK
- select ARCH_REQUIRE_GPIOLIB
- select ARCH_HAS_CPUFREQ
- select GENERIC_TIME
- select GENERIC_CLOCKEVENTS
- help
- Support for TI's OMAP platform (OMAP1 and OMAP2).
- config ARCH_BCMRING
- bool "Broadcom BCMRING"
- depends on MMU
- select CPU_V6
- select ARM_AMBA
- select COMMON_CLKDEV
- select GENERIC_TIME
- select GENERIC_CLOCKEVENTS
- select ARCH_WANT_OPTIONAL_GPIOLIB
- help
- Support for Broadcom's BCMRing platform.
- endchoice
- source "arch/arm/mach-clps711x/Kconfig"
- source "arch/arm/mach-ep93xx/Kconfig"
- source "arch/arm/mach-footbridge/Kconfig"
- source "arch/arm/mach-gemini/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-loki/Kconfig"
- source "arch/arm/mach-mv78xx0/Kconfig"
- source "arch/arm/mach-pxa/Kconfig"
- source "arch/arm/plat-pxa/Kconfig"
- source "arch/arm/mach-mmp/Kconfig"
- source "arch/arm/mach-sa1100/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-kirkwood/Kconfig"
- source "arch/arm/plat-s3c24xx/Kconfig"
- source "arch/arm/plat-s3c64xx/Kconfig"
- source "arch/arm/plat-s3c/Kconfig"
- source "arch/arm/plat-s5pc1xx/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-s3c2440/Kconfig"
- source "arch/arm/mach-s3c2442/Kconfig"
- source "arch/arm/mach-s3c2443/Kconfig"
- endif
- if ARCH_S3C64XX
- source "arch/arm/mach-s3c6400/Kconfig"
- source "arch/arm/mach-s3c6410/Kconfig"
- endif
- source "arch/arm/plat-stmp3xxx/Kconfig"
- if ARCH_S5PC1XX
- source "arch/arm/mach-s5pc100/Kconfig"
- endif
- source "arch/arm/mach-lh7a40x/Kconfig"
- source "arch/arm/mach-h720x/Kconfig"
- source "arch/arm/mach-versatile/Kconfig"
- source "arch/arm/mach-aaec2000/Kconfig"
- source "arch/arm/mach-realview/Kconfig"
- source "arch/arm/mach-at91/Kconfig"
- source "arch/arm/plat-mxc/Kconfig"
- source "arch/arm/mach-nomadik/Kconfig"
- source "arch/arm/mach-netx/Kconfig"
- source "arch/arm/mach-ns9xxx/Kconfig"
- source "arch/arm/mach-davinci/Kconfig"
- source "arch/arm/mach-ks8695/Kconfig"
- source "arch/arm/mach-msm/Kconfig"
- source "arch/arm/mach-u300/Kconfig"
- source "arch/arm/mach-w90x900/Kconfig"
- source "arch/arm/mach-bcmring/Kconfig"
- # Definitions to make life easier
- config ARCH_ACORN
- bool
- config PLAT_IOP
- bool
- config PLAT_ORION
- bool
- config PLAT_PXA
- bool
- source arch/arm/mm/Kconfig
- config IWMMXT
- bool "Enable iWMMXt support"
- depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
- default y if PXA27x || PXA3xx || 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
- 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 && !SMP
- 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.
- endmenu
- source "arch/arm/common/Kconfig"
- config FORCE_MAX_ZONEORDER
- int
- depends on SA1111
- default "9"
- 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 ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
- 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_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 (EXPERIMENTAL)"
- depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
- MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
- depends on GENERIC_CLOCKEVENTS
- select USE_GENERIC_SMP_HELPERS
- select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4)
- 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://www.linuxdoc.org/docs.html#howto>.
- If you don't know what to do here, say N.
- 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
- 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
- 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 && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
- REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4)
- default y
- select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4)
- 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 128 if ARCH_L7200
- default 200 if ARCH_EBSA110 || ARCH_S3C2410
- default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
- default AT91_TIMER_HZ if ARCH_AT91
- default 100
- config THUMB2_KERNEL
- bool "Compile the kernel in Thumb-2 mode"
- depends on CPU_V7 && 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 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
- 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
- # Discontigmem is deprecated
- config ARCH_DISCONTIGMEM_ENABLE
- bool
- config ARCH_SPARSEMEM_ENABLE
- bool
- config ARCH_SPARSEMEM_DEFAULT
- def_bool ARCH_SPARSEMEM_ENABLE
- config ARCH_SELECT_MEMORY_MODEL
- def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
- config NODES_SHIFT
- int
- default "4" if ARCH_LH7A40X
- default "2"
- depends on NEED_MULTIPLE_NODES
- config HIGHMEM
- bool "High Memory Support (EXPERIMENTAL)"
- depends on MMU && EXPERIMENTAL
- 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
- depends on !OUTER_CACHE
- source "mm/Kconfig"
- 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
- 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.
- 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 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).
- 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.
- endmenu
- menu "CPU Power Management"
- if ARCH_HAS_CPUFREQ
- source "drivers/cpufreq/Kconfig"
- config CPU_FREQ_SA1100
- bool
- depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
- default y
- config CPU_FREQ_SA1110
- bool
- depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
- default y
- 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"
- 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"
- 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
- ---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_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
- 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"
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