364 lines
11 KiB
Plaintext
364 lines
11 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_LATEST_VERSION
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bool "4.0.4"
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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 official version from
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kernel.org, like 2.6.x, 2.6.x.y, 3.x.y, ...
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Note: you cannot use this option to select a _longterm_ 2.6
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kernel, because these kernels are not located at the standard
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URL at kernel.org. Instead, select "Custom tarball" and
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specify the right URL directly.
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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 a URL pointing to a kernel source
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tarball. This URL can use any protocol recognized by Buildroot,
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like http://, ftp://, file:// or scp://.
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When pointing to a local tarball using file://, you may want to
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use a make variable like $(TOPDIR) to reference the root of the
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Buildroot tree.
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config BR2_LINUX_KERNEL_CUSTOM_GIT
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bool "Custom Git repository"
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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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config BR2_LINUX_KERNEL_CUSTOM_HG
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bool "Custom Mercurial repository"
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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 Mercurial repository.
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config BR2_LINUX_KERNEL_CUSTOM_LOCAL
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bool "Local directory"
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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 local directory.
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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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if BR2_LINUX_KERNEL_CUSTOM_GIT || BR2_LINUX_KERNEL_CUSTOM_HG
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config BR2_LINUX_KERNEL_CUSTOM_REPO_URL
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string "URL of custom repository"
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default BR2_LINUX_KERNEL_CUSTOM_GIT_REPO_URL \
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if BR2_LINUX_KERNEL_CUSTOM_GIT_REPO_URL != "" # legacy
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config BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION
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string "Custom repository version"
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default BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION \
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if BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION != "" # legacy
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help
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Revision to use in the typical format used by Git/Mercurial
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E.G. a sha id, a tag, branch, ..
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endif
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config BR2_LINUX_KERNEL_CUSTOM_LOCAL_PATH
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string "Path to the local directory"
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depends on BR2_LINUX_KERNEL_CUSTOM_LOCAL
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help
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Path to the local directory with the Linux kernel source code.
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config BR2_LINUX_KERNEL_VERSION
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string
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default "4.0.4" if BR2_LINUX_KERNEL_LATEST_VERSION
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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 \
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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_REPO_VERSION \
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if BR2_LINUX_KERNEL_CUSTOM_GIT || BR2_LINUX_KERNEL_CUSTOM_HG
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default "custom" if BR2_LINUX_KERNEL_CUSTOM_LOCAL
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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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depends on !BR2_LINUX_KERNEL_CUSTOM_LOCAL
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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 *.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 an in-tree defconfig file"
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config BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG
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bool "Using a custom (def)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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Note: this can be a defconfig file or a complete .config file,
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which can later be saved back with make linux-update-(def)config.
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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_arc || BR2_arm || BR2_armeb || BR2_bfin || \
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BR2_powerpc || BR2_powerpc64 || BR2_powerpc64le || \
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BR2_sh || BR2_sh64 || BR2_mips || BR2_mipsel || \
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BR2_mips64 || BR2_mips64el
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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 || \
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BR2_powerpc64 || BR2_powerpc64le || BR2_sparc || \
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BR2_sh || BR2_sh64 || BR2_xtensa
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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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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_IMAGE_NAME
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string "Kernel image name"
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depends on BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM
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help
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The filename of the kernel image, if it is different from the
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make target (above). Only Xtensa uses a filename different from
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the make target. Defaults to BR2_LINUX_KERNEL_IMAGE_TARGET_NAME.
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If unsure, leave it empty.
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config BR2_LINUX_KERNEL_UIMAGE_LOADADDR
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string "load address (for 3.7+ multi-platform image)"
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depends on BR2_arm || BR2_armeb
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depends on BR2_LINUX_KERNEL_UIMAGE || BR2_LINUX_KERNEL_APPENDED_UIMAGE
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help
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If your ARM system's Linux kernel is configured with the new (3.7+)
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multi-architecture support (CONFIG_ARCH_MULTIPLATFORM=y in your
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kernel config), then it is necessary to specify a kernel load address
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when building the uImage. This should be a hexadecimal string
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beginning with 0x, for example: 0x00008000.
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If unsure, let this option empty.
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config BR2_LINUX_KERNEL_DTS_SUPPORT
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bool "Build a Device Tree Blob (DTB)"
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help
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Compile one or more device tree sources into device tree blobs.
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Select the dts files 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 the
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# device tree name or the path to the custom device he uses, but
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# the kernel abstracts this from us and only build an image that
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# looks like a regular kernel image. In this case, we only need
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# to derive the kernel image name from the given device tree
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# 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 names"
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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. You can provide a list of
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dts files to build, separated by spaces.
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config BR2_LINUX_KERNEL_CUSTOM_DTS_PATH
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string "Device Tree Source file paths"
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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 files. You can
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provide a list of dts paths to copy and build,
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separated by spaces.
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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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Note that this option also installs the Device Tree Blobs to
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/boot if DTBs have been generated by the kernel build
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process.
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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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