config ARM bool default y select HAVE_AOUT select HAVE_DMA_API_DEBUG select HAVE_IDE if PCI || ISA || PCMCIA 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_JUMP_LABEL if !XIP_KERNEL 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_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL) select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL) select ARCH_BINFMT_ELF_RANDOMIZE_PIE select HAVE_GENERIC_DMA_COHERENT select HAVE_KERNEL_GZIP select HAVE_KERNEL_LZO select HAVE_KERNEL_LZMA select HAVE_KERNEL_XZ 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 GENERIC_IRQ_SHOW select CPU_PM if (SUSPEND || CPU_IDLE) select GENERIC_PCI_IOMAP select HAVE_BPF_JIT if NET 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 . config ARM_HAS_SG_CHAIN bool config HAVE_PWM bool config MIGHT_HAVE_PCI bool config SYS_SUPPORTS_APM_EMULATION 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 (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 ARCH_HAS_DMA_SET_COHERENT_MASK bool config GENERIC_ISA_DMA bool config FIQ bool config NEED_RET_TO_USER 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" if EMBEDDED default y 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. Only disable this option if you know that you do not require this feature (eg, building a kernel for a single machine) and you need to shrink the kernel to the minimal size. config NEED_MACH_IO_H bool help Select this when mach/io.h is required to provide special definitions for this platform. The need for mach/io.h should be avoided when possible. config NEED_MACH_MEMORY_H bool help Select this when mach/memory.h is required to provide special definitions for this platform. The need for mach/memory.h should be avoided when possible. config PHYS_OFFSET hex "Physical address of main memory" if MMU depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H default DRAM_BASE if !MMU help Please provide the physical address corresponding to the location of main memory in your system. config GENERIC_BUG def_bool y depends on BUG 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 HAVE_MACH_CLKDEV select HAVE_TCM select ICST select GENERIC_CLOCKEVENTS select PLAT_VERSATILE select PLAT_VERSATILE_FPGA_IRQ select NEED_MACH_IO_H select NEED_MACH_MEMORY_H select SPARSE_IRQ help Support for ARM's Integrator platform. config ARCH_REALVIEW bool "ARM Ltd. RealView family" select ARM_AMBA select CLKDEV_LOOKUP select HAVE_MACH_CLKDEV 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 select NEED_MACH_MEMORY_H 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 HAVE_MACH_CLKDEV 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 HAVE_MACH_CLKDEV select GENERIC_CLOCKEVENTS select HAVE_CLK select HAVE_PATA_PLATFORM select ICST select NO_IOPORT 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 select CLKDEV_LOOKUP select IRQ_DOMAIN select NEED_MACH_IO_H if PCCARD help This enables support for systems based on the Atmel AT91RM9200, AT91SAM9 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_HIGHBANK bool "Calxeda Highbank-based" select ARCH_WANT_OPTIONAL_GPIOLIB select ARM_AMBA select ARM_GIC select ARM_TIMER_SP804 select CACHE_L2X0 select CLKDEV_LOOKUP select CPU_V7 select GENERIC_CLOCKEVENTS select HAVE_ARM_SCU select HAVE_SMP select SPARSE_IRQ select USE_OF help Support for the Calxeda Highbank SoC based boards. config ARCH_CLPS711X bool "Cirrus Logic CLPS711x/EP721x-based" select CPU_ARM720T select ARCH_USES_GETTIMEOFFSET select NEED_MACH_MEMORY_H help Support for Cirrus Logic 711x/721x based boards. config ARCH_CNS3XXX bool "Cavium Networks CNS3XXX family" select CPU_V6K select GENERIC_CLOCKEVENTS select ARM_GIC select MIGHT_HAVE_CACHE_L2X0 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_PRIMA2 bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform" select CPU_V7 select NO_IOPORT select GENERIC_CLOCKEVENTS select CLKDEV_LOOKUP select GENERIC_IRQ_CHIP select MIGHT_HAVE_CACHE_L2X0 select PINCTRL select PINCTRL_SIRF select USE_OF select ZONE_DMA help Support for CSR SiRFSoC ARM Cortex A9 Platform config ARCH_EBSA110 bool "EBSA-110" select CPU_SA110 select ISA select NO_IOPORT select ARCH_USES_GETTIMEOFFSET select NEED_MACH_IO_H select NEED_MACH_MEMORY_H 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 select NEED_MACH_MEMORY_H help This enables support for the Cirrus EP93xx series of CPUs. config ARCH_FOOTBRIDGE bool "FootBridge" select CPU_SA110 select FOOTBRIDGE select GENERIC_CLOCKEVENTS select HAVE_IDE select NEED_MACH_IO_H select NEED_MACH_MEMORY_H 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 GENERIC_IRQ_CHIP select MULTI_IRQ_HANDLER 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 select HAVE_CLK_PREPARE select PINCTRL 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 select NEED_MACH_IO_H select NEED_MACH_MEMORY_H select NEED_RET_TO_USER help Support for Intel's IOP13XX (XScale) family of processors. config ARCH_IOP32X bool "IOP32x-based" depends on MMU select CPU_XSCALE select NEED_MACH_IO_H select NEED_RET_TO_USER 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 NEED_MACH_IO_H select NEED_RET_TO_USER 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 select NEED_MACH_IO_H select NEED_MACH_MEMORY_H 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 select NEED_MACH_IO_H select NEED_MACH_MEMORY_H help Support for Intel's IXP2400/2800 (XScale) family of processors. config ARCH_IXP4XX bool "IXP4xx-based" depends on MMU select ARCH_HAS_DMA_SET_COHERENT_MASK select CLKSRC_MMIO select CPU_XSCALE select GENERIC_GPIO select GENERIC_CLOCKEVENTS select MIGHT_HAVE_PCI select NEED_MACH_IO_H 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 NEED_MACH_IO_H 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 NEED_MACH_IO_H select PLAT_ORION help Support for the following Marvell Kirkwood series SoCs: 88F6180, 88F6192 and 88F6281. 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_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 NEED_MACH_IO_H 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 GPIO_PXA select TICK_ONESHOT select PLAT_PXA select SPARSE_IRQ select GENERIC_ALLOCATOR 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 select NEED_MACH_MEMORY_H 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. config ARCH_TEGRA bool "NVIDIA Tegra" select CLKDEV_LOOKUP select CLKSRC_MMIO select GENERIC_CLOCKEVENTS select GENERIC_GPIO select HAVE_CLK select HAVE_SMP select MIGHT_HAVE_CACHE_L2X0 select NEED_MACH_IO_H if PCI select ARCH_HAS_CPUFREQ help This enables support for NVIDIA Tegra based systems (Tegra APX, Tegra 6xx and Tegra 2 series). config ARCH_PICOXCELL bool "Picochip picoXcell" select ARCH_REQUIRE_GPIOLIB select ARM_PATCH_PHYS_VIRT select ARM_VIC select CPU_V6K select DW_APB_TIMER select GENERIC_CLOCKEVENTS select GENERIC_GPIO select HAVE_TCM select NO_IOPORT select SPARSE_IRQ select USE_OF help This enables support for systems based on the Picochip picoXcell family of Femtocell devices. The picoxcell support requires device tree for all boards. 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 GPIO_PXA select TICK_ONESHOT select PLAT_PXA select SPARSE_IRQ select AUTO_ZRELADDR select MULTI_IRQ_HANDLER select ARM_CPU_SUSPEND if PM select HAVE_IDE 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 HAVE_MACH_CLKDEV select HAVE_SMP select GENERIC_CLOCKEVENTS select MIGHT_HAVE_CACHE_L2X0 select NO_IOPORT select SPARSE_IRQ select MULTI_IRQ_HANDLER select PM_GENERIC_DOMAINS if PM select NEED_MACH_MEMORY_H help Support for Renesas's SH-Mobile and R-Mobile ARM platforms. config ARCH_RPC bool "RiscPC" select ARCH_ACORN select FIQ 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 select HAVE_IDE select NEED_MACH_IO_H select NEED_MACH_MEMORY_H 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 CLKDEV_LOOKUP select TICK_ONESHOT select ARCH_REQUIRE_GPIOLIB select HAVE_IDE select NEED_MACH_MEMORY_H select SPARSE_IRQ help Support for StrongARM 11x0 based boards. config ARCH_S3C24XX bool "Samsung S3C24XX SoCs" select GENERIC_GPIO select ARCH_HAS_CPUFREQ select HAVE_CLK select CLKDEV_LOOKUP select ARCH_USES_GETTIMEOFFSET select HAVE_S3C2410_I2C if I2C select HAVE_S3C_RTC if RTC_CLASS select HAVE_S3C2410_WATCHDOG if WATCHDOG select NEED_MACH_IO_H help Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443 and S3C2450 SoCs based systems, such as the Simtec Electronics BAST (), the IPAQ 1940 or the Samsung SMDK2410 development board (and derivatives). config ARCH_S3C64XX bool "Samsung S3C64XX" select PLAT_SAMSUNG select CPU_V6 select ARM_VIC select HAVE_CLK select HAVE_TCM select CLKDEV_LOOKUP select NO_IOPORT select ARCH_USES_GETTIMEOFFSET select ARCH_HAS_CPUFREQ select ARCH_REQUIRE_GPIOLIB select SAMSUNG_CLKSRC select SAMSUNG_IRQ_VIC_TIMER select S3C_GPIO_TRACK 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 CLKDEV_LOOKUP select CLKSRC_MMIO select HAVE_S3C2410_WATCHDOG if WATCHDOG select GENERIC_CLOCKEVENTS 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_S5PC100 bool "Samsung S5PC100" select GENERIC_GPIO select HAVE_CLK select CLKDEV_LOOKUP select CPU_V7 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 ARCH_HAS_HOLES_MEMORYMODEL select GENERIC_GPIO select HAVE_CLK select CLKDEV_LOOKUP select CLKSRC_MMIO select ARCH_HAS_CPUFREQ select GENERIC_CLOCKEVENTS select HAVE_S3C2410_I2C if I2C select HAVE_S3C_RTC if RTC_CLASS select HAVE_S3C2410_WATCHDOG if WATCHDOG select NEED_MACH_MEMORY_H help Samsung S5PV210/S5PC110 series based systems config ARCH_EXYNOS bool "SAMSUNG EXYNOS" select CPU_V7 select ARCH_SPARSEMEM_ENABLE select ARCH_HAS_HOLES_MEMORYMODEL select GENERIC_GPIO select HAVE_CLK select CLKDEV_LOOKUP 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 select NEED_MACH_MEMORY_H help Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5) config ARCH_SHARK bool "Shark" select CPU_SA110 select ISA select ISA_DMA select ZONE_DMA select PCI select ARCH_USES_GETTIMEOFFSET select NEED_MACH_MEMORY_H select NEED_MACH_IO_H help Support for the StrongARM based Digital DNARD machine, also known as "Shark" (). config ARCH_U300 bool "ST-Ericsson U300 Series" depends on MMU select CLKSRC_MMIO select CPU_ARM926T select HAVE_TCM select ARM_AMBA select ARM_PATCH_PHYS_VIRT select ARM_VIC select GENERIC_CLOCKEVENTS select CLKDEV_LOOKUP select HAVE_MACH_CLKDEV select GENERIC_GPIO select ARCH_REQUIRE_GPIOLIB help Support for ST-Ericsson U300 series mobile platforms. config ARCH_U8500 bool "ST-Ericsson U8500 Series" depends on MMU select CPU_V7 select ARM_AMBA select GENERIC_CLOCKEVENTS select CLKDEV_LOOKUP select ARCH_REQUIRE_GPIOLIB select ARCH_HAS_CPUFREQ select HAVE_SMP select MIGHT_HAVE_CACHE_L2X0 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 PINCTRL select MIGHT_HAVE_CACHE_L2X0 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 CLKSRC_MMIO select GENERIC_CLOCKEVENTS 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. config ARCH_ZYNQ bool "Xilinx Zynq ARM Cortex A9 Platform" select CPU_V7 select GENERIC_CLOCKEVENTS select CLKDEV_LOOKUP select ARM_GIC select ARM_AMBA select ICST select MIGHT_HAVE_CACHE_L2X0 select USE_OF help Support for Xilinx Zynq ARM Cortex A9 Platform 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-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/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/mach-s3c24xx/Kconfig" if ARCH_S3C24XX source "arch/arm/mach-s3c2412/Kconfig" source "arch/arm/mach-s3c2440/Kconfig" endif if ARCH_S3C64XX source "arch/arm/mach-s3c64xx/Kconfig" endif source "arch/arm/mach-s5p64x0/Kconfig" source "arch/arm/mach-s5pc100/Kconfig" source "arch/arm/mach-s5pv210/Kconfig" source "arch/arm/mach-exynos/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 config PLAT_ORION bool select CLKSRC_MMIO select GENERIC_IRQ_CHIP config PLAT_PXA bool config PLAT_VERSATILE bool config ARM_TIMER_SP804 bool select CLKSRC_MMIO select HAVE_SCHED_CLOCK source arch/arm/mm/Kconfig config ARM_NR_BANKS int default 16 if ARCH_EP93XX default 8 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. config XSCALE_PMU bool depends on CPU_XSCALE 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 "PL310 errata: 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 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 "PL310 errata: 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 (r2p*) 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 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 PL310_ERRATA_753970 bool "PL310 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. config ARM_ERRATA_364296 bool "ARM errata: Possible cache data corruption with hit-under-miss enabled" depends on CPU_V6 && !SMP help This options enables the workaround for the 364296 ARM1136 r0p2 erratum (possible cache data corruption with hit-under-miss enabled). It sets the undocumented bit 31 in the auxiliary control register and the FI bit in the control register, thus disabling hit-under-miss without putting the processor into full low interrupt latency mode. ARM11MPCore is not affected. config ARM_ERRATA_764369 bool "ARM errata: Data cache line maintenance operation by MVA may not succeed" depends on CPU_V7 && SMP help This option enables the workaround for erratum 764369 affecting Cortex-A9 MPCore with two or more processors (all current revisions). Under certain timing circumstances, a data cache line maintenance operation by MVA targeting an Inner Shareable memory region may fail to proceed up to either the Point of Coherency or to the Point of Unification of the system. This workaround adds a DSB instruction before the relevant cache maintenance functions and sets a specific bit in the diagnostic control register of the SCU. config PL310_ERRATA_769419 bool "PL310 errata: no automatic Store Buffer drain" depends on CACHE_L2X0 help On revisions of the PL310 prior to r3p2, the Store Buffer does not automatically drain. This can cause normal, non-cacheable writes to be retained when the memory system is idle, leading to suboptimal I/O performance for drivers using coherent DMA. This option adds a write barrier to the cpu_idle loop so that, on systems with an outer cache, the store buffer is drained explicitly. 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 HAVE_SMP bool help This option should be selected by machines which have an SMP- capable CPU. The only effect of this option is to make the SMP-related options available to the user for configuration. config SMP bool "Symmetric Multi-Processing" depends on CPU_V6K || CPU_V7 depends on GENERIC_CLOCKEVENTS depends on HAVE_SMP depends on MMU 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 , and the SMP-HOWTO available at . 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 ARM_CPU_TOPOLOGY bool "Support cpu topology definition" depends on SMP && CPU_V7 default y help Support ARM cpu topology definition. The MPIDR register defines affinity between processors which is then used to describe the cpu topology of an ARM System. config SCHED_MC bool "Multi-core scheduler support" depends on ARM_CPU_TOPOLOGY help Multi-core scheduler support improves the CPU scheduler's decision making when dealing with multi-core CPU chips at a cost of slightly increased overhead in some places. If unsure say N here. config SCHED_SMT bool "SMT scheduler support" depends on ARM_CPU_TOPOLOGY help Improves the CPU scheduler's decision making when dealing with MultiThreading at a cost of slightly increased overhead in some places. If unsure say N here. config HAVE_ARM_SCU bool 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 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. config ARCH_NR_GPIO int default 1024 if ARCH_SHMOBILE || ARCH_TEGRA default 355 if ARCH_U8500 default 264 if MACH_H4700 default 0 help Maximum number of GPIOs in the system. If unsure, leave the default value. source kernel/Kconfig.preempt config HZ int default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \ 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 select ARM_UNWIND 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" config USE_OF bool "Flattened Device Tree support" select OF select OF_EARLY_FLATTREE select IRQ_DOMAIN help Include support for flattened device tree machine descriptions. # 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. choice prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)" depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL default ZBOOT_ROM_NONE help Include experimental SD/MMC 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 or SD 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. config ZBOOT_ROM_NONE bool "No SD/MMC loader in zImage (EXPERIMENTAL)" help Do not load image from SD or MMC config ZBOOT_ROM_MMCIF bool "Include MMCIF loader in zImage (EXPERIMENTAL)" help Load image from MMCIF hardware block. config ZBOOT_ROM_SH_MOBILE_SDHI bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)" help Load image from SDHI hardware block endchoice config ARM_APPENDED_DTB bool "Use appended device tree blob to zImage (EXPERIMENTAL)" depends on OF && !ZBOOT_ROM && EXPERIMENTAL help With this option, the boot code will look for a device tree binary (DTB) appended to zImage (e.g. cat zImage .dtb > zImage_w_dtb). This is meant as a backward compatibility convenience for those systems with a bootloader that can't be upgraded to accommodate the documented boot protocol using a device tree. Beware that there is very little in terms of protection against this option being confused by leftover garbage in memory that might look like a DTB header after a reboot if no actual DTB is appended to zImage. Do not leave this option active in a production kernel if you don't intend to always append a DTB. Proper passing of the location into r2 of a bootloader provided DTB is always preferable to this option. config ARM_ATAG_DTB_COMPAT bool "Supplement the appended DTB with traditional ATAG information" depends on ARM_APPENDED_DTB help Some old bootloaders can't be updated to a DTB capable one, yet they provide ATAGs with memory configuration, the ramdisk address, the kernel cmdline string, etc. Such information is dynamically provided by the bootloader and can't always be stored in a static DTB. To allow a device tree enabled kernel to be used with such bootloaders, this option allows zImage to extract the information from the ATAG list and store it at run time into the appended DTB. 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 && !ARM_LPAE 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 && (!SMP || HOTPLUG_CPU) 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 . If in doubt, say Y. config CPU_FREQ_PXA bool depends on CPU_FREQ && ARCH_PXA && PXA25x default y select CPU_FREQ_TABLE select CPU_FREQ_DEFAULT_GOV_USERSPACE 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_S3C24XX && 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 . 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 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_S5PC100 depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \ CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE def_bool y config ARM_CPU_SUSPEND def_bool PM_SLEEP endmenu source "net/Kconfig" source "drivers/Kconfig" source "fs/Kconfig" source "arch/arm/Kconfig.debug" source "security/Kconfig" source "crypto/Kconfig" source "lib/Kconfig"