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| -rw-r--r-- | meta/classes/uboot-extlinux-config.bbclass | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/meta/classes/uboot-extlinux-config.bbclass b/meta/classes/uboot-extlinux-config.bbclass new file mode 100644 index 00000000000..df91386c003 --- /dev/null +++ b/meta/classes/uboot-extlinux-config.bbclass @@ -0,0 +1,126 @@ +# uboot-extlinux-config.bbclass +# +# This class allow the extlinux.conf generation for U-Boot use. The +# U-Boot support for it is given to allow the Generic Distribution +# Configuration specification use by OpenEmbedded-based products. +# +# External variables: +# +# UBOOT_EXTLINUX_CONSOLE - Set to "console=ttyX" to change kernel boot +# default console. +# UBOOT_EXTLINUX_LABELS - A list of targets for the automatic config. +# UBOOT_EXTLINUX_KERNEL_ARGS - Add additional kernel arguments. +# UBOOT_EXTLINUX_KERNEL_IMAGE - Kernel image name. +# UBOOT_EXTLINUX_FDTDIR - Device tree directory. +# UBOOT_EXTLINUX_INITRD - Indicates a list of filesystem images to +# concatenate and use as an initrd (optional). +# UBOOT_EXTLINUX_MENU_DESCRIPTION - Name to use as description. +# UBOOT_EXTLINUX_ROOT - Root kernel cmdline. +# +# If there's only one label system will boot automatically and menu won't be +# created. If you want to use more than one labels, e.g linux and alternate, +# use overrides to set menu description, console and others variables. +# +# Ex: +# +# UBOOT_EXTLINUX_LABELS ??= "default fallback" +# +# UBOOT_EXTLINUX_KERNEL_IMAGE_default ??= "../zImage" +# UBOOT_EXTLINUX_MENU_DESCRIPTION_default ??= "Linux Default" +# +# UBOOT_EXTLINUX_KERNEL_IMAGE_fallback ??= "../zImage-fallback" +# UBOOT_EXTLINUX_MENU_DESCRIPTION_fallback ??= "Linux Fallback" +# +# Results: +# +# menu title Select the boot mode +# LABEL Linux Default +# KERNEL ../zImage +# FDTDIR ../ +# APPEND root=/dev/mmcblk2p2 rootwait rw console=${console} +# LABEL Linux Fallback +# KERNEL ../zImage-fallback +# FDTDIR ../ +# APPEND root=/dev/mmcblk2p2 rootwait rw console=${console} +# +# Copyright (C) 2016, O.S. Systems Software LTDA. All Rights Reserved +# Released under the MIT license (see packages/COPYING) +# +# The kernel has an internal default console, which you can override with +# a console=...some_tty... +UBOOT_EXTLINUX_CONSOLE ??= "console=${console}" +UBOOT_EXTLINUX_LABELS ??= "linux" +UBOOT_EXTLINUX_FDTDIR ??= "../" +UBOOT_EXTLINUX_KERNEL_IMAGE ??= "../${KERNEL_IMAGETYPE}" +UBOOT_EXTLINUX_KERNEL_ARGS ??= "rootwait rw" +UBOOT_EXTLINUX_MENU_DESCRIPTION_linux ??= "${DISTRO_NAME}" + +UBOOT_EXTLINUX_CONFIG = "${B}/extlinux.conf" + +python create_extlinux_config() { + if d.getVar("UBOOT_EXTLINUX", True) != "1": + return + + if not d.getVar('WORKDIR', True): + bb.error("WORKDIR not defined, unable to package") + + labels = d.getVar('UBOOT_EXTLINUX_LABELS', True) + if not labels: + bb.fatal("UBOOT_EXTLINUX_LABELS not defined, nothing to do") + + if not labels.strip(): + bb.fatal("No labels, nothing to do") + + cfile = d.getVar('UBOOT_EXTLINUX_CONFIG', True) + if not cfile: + bb.fatal('Unable to read UBOOT_EXTLINUX_CONFIG') + + try: + with open(cfile, 'w') as cfgfile: + cfgfile.write('# Generic Distro Configuration file generated by OpenEmbedded\n') + + if len(labels.split()) > 1: + cfgfile.write('menu title Select the boot mode\n') + + for label in labels.split(): + localdata = bb.data.createCopy(d) + + overrides = localdata.getVar('OVERRIDES', True) + if not overrides: + bb.fatal('OVERRIDES not defined') + + localdata.setVar('OVERRIDES', label + ':' + overrides) + bb.data.update_data(localdata) + + extlinux_console = localdata.getVar('UBOOT_EXTLINUX_CONSOLE', True) + + menu_description = localdata.getVar('UBOOT_EXTLINUX_MENU_DESCRIPTION', True) + if not menu_description: + menu_description = label + + root = localdata.getVar('UBOOT_EXTLINUX_ROOT', True) + if not root: + bb.fatal('UBOOT_EXTLINUX_ROOT not defined') + + kernel_image = localdata.getVar('UBOOT_EXTLINUX_KERNEL_IMAGE', True) + fdtdir = localdata.getVar('UBOOT_EXTLINUX_FDTDIR', True) + if fdtdir: + cfgfile.write('LABEL %s\n\tKERNEL %s\n\tFDTDIR %s\n' % + (menu_description, kernel_image, fdtdir)) + else: + cfgfile.write('LABEL %s\n\tKERNEL %s\n' % (menu_description, kernel_image)) + + kernel_args = localdata.getVar('UBOOT_EXTLINUX_KERNEL_ARGS', True) + + initrd = localdata.getVar('UBOOT_EXTLINUX_INITRD', True) + if initrd: + cfgfile.write('\tINITRD %s\n'% initrd) + + kernel_args = root + " " + kernel_args + cfgfile.write('\tAPPEND %s %s\n' % (kernel_args, extlinux_console)) + + except OSError: + bb.fatal('Unable to open %s' % (cfile)) +} + +do_install[prefuncs] += "create_extlinux_config" |