292 lines
8.0 KiB
Plaintext
292 lines
8.0 KiB
Plaintext
menu "Kernel"
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config BR2_LINUX_KERNEL
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bool "Linux Kernel"
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help
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Enable this option if you want to build a Linux kernel for
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your embedded device
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if BR2_LINUX_KERNEL
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#
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# Version selection. We provide the choice between:
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#
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# 1. A single fairly recent stable kernel version
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# 2. In case an internal toolchain has been built, the same kernel
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# version as the kernel headers
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# 3. A custom stable version
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# 4. A custom tarball
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#
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choice
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prompt "Kernel version"
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config BR2_LINUX_KERNEL_3_6
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bool "3.6"
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config BR2_LINUX_KERNEL_SAME_AS_HEADERS
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bool "Same as toolchain kernel headers"
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depends on BR2_TOOLCHAIN_BUILDROOT
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help
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This option will re-use the same kernel sources as the one
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that have been used for the kernel headers of the
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cross-compiling toolchain. Having the same version for the
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kernel running on the system and for the kernel headers is
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not a requirement, but using the same version allows to
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download only one tarball of the kernel sources.
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config BR2_LINUX_KERNEL_CUSTOM_VERSION
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bool "Custom version"
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help
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This option allows to use a specific 2.6.x or 2.6.x.y
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official versions, as available on kernel.org
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config BR2_LINUX_KERNEL_CUSTOM_TARBALL
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bool "Custom tarball"
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help
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This option allows to specify the http or ftp location of a
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specific kernel source tarball
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config BR2_LINUX_KERNEL_CUSTOM_GIT
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bool "Custom Git tree"
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help
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This option allows Buildroot to get the Linux kernel source
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code from a Git repository.
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endchoice
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config BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE
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string "Kernel version"
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depends on BR2_LINUX_KERNEL_CUSTOM_VERSION
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config BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION
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string "URL of custom kernel tarball"
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depends on BR2_LINUX_KERNEL_CUSTOM_TARBALL
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config BR2_LINUX_KERNEL_CUSTOM_GIT_REPO_URL
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string "URL of custom Git repository"
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depends on BR2_LINUX_KERNEL_CUSTOM_GIT
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config BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION
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string "Custom Git version"
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default "HEAD"
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depends on BR2_LINUX_KERNEL_CUSTOM_GIT
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help
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Git revision to use in the format used by git rev-parse,
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E.G. a sha id, a tag, branch, ..
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config BR2_LINUX_KERNEL_VERSION
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string
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default "3.6" if BR2_LINUX_KERNEL_3_6
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default BR2_DEFAULT_KERNEL_HEADERS if BR2_LINUX_KERNEL_SAME_AS_HEADERS
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default BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE if BR2_LINUX_KERNEL_CUSTOM_VERSION
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default "custom" if BR2_LINUX_KERNEL_CUSTOM_TARBALL
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default $BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION if BR2_LINUX_KERNEL_CUSTOM_GIT
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#
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# Patch selection
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#
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config BR2_LINUX_KERNEL_PATCH
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string "Custom kernel patches"
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help
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A space-separated list of patches to apply to the
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kernel. Each patch can be described as an URL, a local file
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path, or a directory. In the case of a directory, all files
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matching linux-*.patch in the directory will be applied.
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#
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# Configuration selection
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#
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choice
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prompt "Kernel configuration"
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default BR2_LINUX_KERNEL_USE_DEFCONFIG
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config BR2_LINUX_KERNEL_USE_DEFCONFIG
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bool "Using a defconfig"
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config BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG
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bool "Using a custom config file"
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endchoice
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config BR2_LINUX_KERNEL_DEFCONFIG
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string "Defconfig name"
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depends on BR2_LINUX_KERNEL_USE_DEFCONFIG
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help
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Name of the kernel defconfig file to use, without the
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trailing _defconfig. The defconfig is located in
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arch/<arch>/configs in the kernel tree.
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config BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE
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string "Configuration file path"
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depends on BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG
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help
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Path to the kernel configuration file
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#
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# Binary format
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#
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config BR2_LINUX_KERNEL_UBOOT_IMAGE
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bool
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choice
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prompt "Kernel binary format"
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config BR2_LINUX_KERNEL_UIMAGE
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bool "uImage"
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depends on BR2_arm || BR2_armeb || BR2_bfin || BR2_powerpc || BR2_avr32 || BR2_sh || BR2_sh64
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select BR2_LINUX_KERNEL_UBOOT_IMAGE
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config BR2_LINUX_KERNEL_APPENDED_UIMAGE
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bool "uImage with appended DT"
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depends on BR2_arm || BR2_armeb
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select BR2_LINUX_KERNEL_DTS_SUPPORT
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select BR2_LINUX_KERNEL_APPENDED_DTB
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select BR2_LINUX_KERNEL_UBOOT_IMAGE
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config BR2_LINUX_KERNEL_BZIMAGE
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bool "bzImage"
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depends on BR2_i386 || BR2_x86_64
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config BR2_LINUX_KERNEL_ZIMAGE
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bool "zImage"
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depends on BR2_arm || BR2_armeb || BR2_powerpc || BR2_sparc || BR2_sh || BR2_sh64
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config BR2_LINUX_KERNEL_APPENDED_ZIMAGE
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bool "zImage with appended DT"
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depends on BR2_arm || BR2_armeb
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select BR2_LINUX_KERNEL_DTS_SUPPORT
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select BR2_LINUX_KERNEL_APPENDED_DTB
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config BR2_LINUX_KERNEL_CUIMAGE
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bool "cuImage"
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depends on BR2_powerpc
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select BR2_LINUX_KERNEL_UBOOT_IMAGE
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select BR2_LINUX_KERNEL_DTS_SUPPORT
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select BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
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config BR2_LINUX_KERNEL_SIMPLEIMAGE
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bool "simpleImage"
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depends on BR2_microblaze
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select BR2_LINUX_KERNEL_UBOOT_IMAGE
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select BR2_LINUX_KERNEL_DTS_SUPPORT
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select BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
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config BR2_LINUX_KERNEL_LINUX_BIN
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bool "linux.bin"
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depends on BR2_microblaze
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select BR2_LINUX_KERNEL_UBOOT_IMAGE
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select BR2_LINUX_KERNEL_DTS_SUPPORT
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select BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
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config BR2_LINUX_KERNEL_VMLINUX_BIN
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bool "vmlinux.bin"
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depends on BR2_mips || BR2_mipsel || BR2_sh || BR2_sh64
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config BR2_LINUX_KERNEL_VMLINUX
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bool "vmlinux"
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config BR2_LINUX_KERNEL_VMLINUZ
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bool "vmlinuz"
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depends on BR2_mips || BR2_mipsel
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config BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM
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bool "custom target"
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help
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For certain cases a board-specific target image must be
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used. For example, on powerPC where the OpenFirmware
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description is attached in a board-specific kernel image
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target like 'cuImage.mpc8379_rdb'.
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Select this option and specify the make target in "Kernel
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image target name".
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endchoice
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config BR2_LINUX_KERNEL_IMAGE_TARGET_NAME
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string "Kernel image target name"
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depends on BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM
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help
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Specify the kernel make target to build the kernel that you
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need.
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config BR2_LINUX_KERNEL_DTS_SUPPORT
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bool "Device tree support"
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help
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Compile a device tree source into a device tree blob.
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Select the dts file to compile in the options below.
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if BR2_LINUX_KERNEL_DTS_SUPPORT
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# We have mainly three cases when it comes to device tree support:
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# 1) We don't want any support at all. Then the ..DTS_SUPPORT
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# variable won't be set
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# 2) We want device tree support, so we need the user to enter
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# the device tree name or the the path to the custom device
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# he uses, but the kernel abstracts this from us and only
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# build an image that looks like a regular kernel image. In
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# this case, we only need to derive the kernel image name from
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# the given device tree name, and all the rest is as usual
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# 3) We want device tree support, but the kernel requires us to
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# build the device tree blob separately. In this case, some
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# more logic will be needed.
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# The variable below address the second case, were you only want
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# limited actions from buildroot.
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config BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
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bool
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config BR2_LINUX_KERNEL_APPENDED_DTB
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bool
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choice
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prompt "Device tree source"
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default BR2_LINUX_KERNEL_USE_INTREE_DTS
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config BR2_LINUX_KERNEL_USE_INTREE_DTS
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bool "Use a device tree present in the kernel."
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help
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Use a device tree source distributed with
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the kernel sources. The dts files are located
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in the arch/<arch>/boot/dts folder.
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config BR2_LINUX_KERNEL_USE_CUSTOM_DTS
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bool "Use a custom device tree file"
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help
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Use a custom device tree file, i.e, a device
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tree file that does not belong to the kernel
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source tree.
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endchoice
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config BR2_LINUX_KERNEL_INTREE_DTS_NAME
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string "Device Tree Source file name"
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depends on BR2_LINUX_KERNEL_USE_INTREE_DTS
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help
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Name of the device tree source file, without
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the trailing .dts
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config BR2_LINUX_KERNEL_CUSTOM_DTS_PATH
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string "Device Tree Source file path"
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depends on BR2_LINUX_KERNEL_USE_CUSTOM_DTS
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help
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Path to the device tree source file
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endif
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config BR2_LINUX_KERNEL_INSTALL_TARGET
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bool "Install kernel image to /boot in target"
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depends on !BR2_TARGET_ROOTFS_INITRAMFS
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help
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Select this option to have the kernel image installed to
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/boot in the target root filesystem, as is typically done on
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x86/x86_64 systems.
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# Linux extensions
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source "linux/Config.ext.in"
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endif # BR2_LINUX_KERNEL
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endmenu
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