# For a description of the syntax of this configuration file,
# see Documentation/kbuild/kconfig-language.txt.

mainmenu "Linux/Xtensa Kernel Configuration"

config FRAME_POINTER
        def_bool n

config ZONE_DMA
        def_bool y

config XTENSA
        def_bool y
        select HAVE_IDE
        help
          Xtensa processors are 32-bit RISC machines designed by Tensilica
          primarily for embedded systems.  These processors are both
          configurable and extensible.  The Linux port to the Xtensa
          architecture supports all processor configurations and extensions,
          with reasonable minimum requirements.  The Xtensa Linux project has
          a home page at <http://xtensa.sourceforge.net/>.

config RWSEM_XCHGADD_ALGORITHM
        def_bool y

config GENERIC_FIND_NEXT_BIT
        def_bool y

config GENERIC_HWEIGHT
        def_bool y

config GENERIC_HARDIRQS
        def_bool y

config GENERIC_GPIO
        def_bool y

config ARCH_HAS_ILOG2_U32
        def_bool n

config ARCH_HAS_ILOG2_U64
        def_bool n

config NO_IOPORT
        def_bool y

config HZ
        int
        default 100

config GENERIC_TIME
        def_bool y

source "init/Kconfig"
source "kernel/Kconfig.freezer"

config MMU
        def_bool n

config VARIANT_IRQ_SWITCH
        def_bool n

menu "Processor type and features"

choice
        prompt "Xtensa Processor Configuration"
        default XTENSA_VARIANT_FSF

config XTENSA_VARIANT_FSF
        bool "fsf - default (not generic) configuration"
        select MMU

config XTENSA_VARIANT_DC232B
        bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
        select MMU
        help
          This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).

config XTENSA_VARIANT_S6000
        bool "s6000 - Stretch software configurable processor"
        select VARIANT_IRQ_SWITCH
        select ARCH_REQUIRE_GPIOLIB
        select XTENSA_CALIBRATE_CCOUNT
endchoice

config XTENSA_UNALIGNED_USER
        bool "Unaligned memory access in use space"
        help
          The Xtensa architecture currently does not handle unaligned
          memory accesses in hardware but through an exception handler.
          Per default, unaligned memory accesses are disabled in user space.

          Say Y here to enable unaligned memory access in user space.

config PREEMPT
        bool "Preemptible Kernel"
        help
          This option reduces the latency of the kernel when reacting to
          real-time or interactive events by allowing a low priority process to
          be preempted even if it is in kernel mode executing a system call.
          Unfortunately the kernel code has some race conditions if both
          CONFIG_SMP and CONFIG_PREEMPT are enabled, so this option is
          currently disabled if you are building an SMP kernel.

          Say Y here if you are building a kernel for a desktop, embedded
          or real-time system.  Say N if you are unsure.

config MATH_EMULATION
        bool "Math emulation"
        help
        Can we use information of configuration file?

endmenu

config XTENSA_CALIBRATE_CCOUNT
        def_bool n
        help
          On some platforms (XT2000, for example), the CPU clock rate can
          vary.  The frequency can be determined, however, by measuring
          against a well known, fixed frequency, such as an UART oscillator.

config SERIAL_CONSOLE
        def_bool n

config XTENSA_ISS_NETWORK
        def_bool n

menu "Bus options"

config PCI
        bool "PCI support"
        default y
        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.

source "drivers/pci/Kconfig"

endmenu

menu "Platform options"

choice
        prompt "Xtensa System Type"
        default XTENSA_PLATFORM_ISS

config XTENSA_PLATFORM_ISS
        bool "ISS"
        select XTENSA_CALIBRATE_CCOUNT
        select SERIAL_CONSOLE
        select XTENSA_ISS_NETWORK
        help
          ISS is an acronym for Tensilica's Instruction Set Simulator.

config XTENSA_PLATFORM_XT2000
        bool "XT2000"
        help
          XT2000 is the name of Tensilica's feature-rich emulation platform.
          This hardware is capable of running a full Linux distribution.

config XTENSA_PLATFORM_S6105
        bool "S6105"
        select SERIAL_CONSOLE

endchoice


config XTENSA_CPU_CLOCK
        int "CPU clock rate [MHz]"
        depends on !XTENSA_CALIBRATE_CCOUNT
        default 16

config GENERIC_CALIBRATE_DELAY
        bool "Auto calibration of the BogoMIPS value"
        help
          The BogoMIPS value can easily be derived from the CPU frequency.

config CMDLINE_BOOL
        bool "Default bootloader kernel arguments"

config CMDLINE
        string "Initial kernel command string"
        depends on CMDLINE_BOOL
        default "console=ttyS0,38400 root=/dev/ram"
        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).

source "mm/Kconfig"

config HOTPLUG
        bool "Support for hot-pluggable devices"
        help
          Say Y here if you want to plug devices into your computer while
          the system is running, and be able to use them quickly.  In many
          cases, the devices can likewise be unplugged at any time too.

          One well known example of this is PCMCIA- or PC-cards, credit-card
          size devices such as network cards, modems or hard drives which are
          plugged into slots found on all modern laptop computers.  Another
          example, used on modern desktops as well as laptops, is USB.

          Enable HOTPLUG and build a modular kernel.  Get agent software
          (from <http://linux-hotplug.sourceforge.net/>) and install it.
          Then your kernel will automatically call out to a user mode "policy
          agent" (/sbin/hotplug) to load modules and set up software needed
          to use devices as you hotplug them.

source "drivers/pcmcia/Kconfig"

source "drivers/pci/hotplug/Kconfig"

endmenu

menu "Executable file formats"

# only elf supported
config KCORE_ELF
        def_bool y
        depends on PROC_FS
        help
          If you enabled support for /proc file system then the file
          /proc/kcore will contain the kernel core image in ELF format. This
          can be used in gdb:

          $ cd /usr/src/linux ; gdb vmlinux /proc/kcore

          This is especially useful if you have compiled the kernel with the
          "-g" option to preserve debugging information. It is mainly used
          for examining kernel data structures on the live kernel.

source "fs/Kconfig.binfmt"

endmenu

source "net/Kconfig"

source "drivers/Kconfig"

source "fs/Kconfig"

menu "Xtensa initrd options"
        depends on BLK_DEV_INITRD

config EMBEDDED_RAMDISK
        bool "Embed root filesystem ramdisk into the kernel"

config EMBEDDED_RAMDISK_IMAGE
        string "Filename of gzipped ramdisk image"
        depends on EMBEDDED_RAMDISK
        default "ramdisk.gz"
        help
          This is the filename of the ramdisk image to be built into the
          kernel.  Relative pathnames are relative to arch/xtensa/boot/ramdisk/.
          The ramdisk image is not part of the kernel distribution; you must
          provide one yourself.
endmenu

source "arch/xtensa/Kconfig.debug"

source "security/Kconfig"

source "crypto/Kconfig"

source "lib/Kconfig"