diff options
Diffstat (limited to 'meta/classes/uboot-extlinux-config.bbclass')
| -rw-r--r-- | meta/classes/uboot-extlinux-config.bbclass | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/meta/classes/uboot-extlinux-config.bbclass b/meta/classes/uboot-extlinux-config.bbclass new file mode 100644 index 0000000000..f4bf94be04 --- /dev/null +++ b/meta/classes/uboot-extlinux-config.bbclass @@ -0,0 +1,157 @@ +# 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_FDT - Device tree file. +# 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. +# UBOOT_EXTLINUX_TIMEOUT - Timeout before DEFAULT selection is made. +# Measured in 1/10 of a second. +# UBOOT_EXTLINUX_DEFAULT_LABEL - Target to be selected by default after +# the timeout period +# +# 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_DEFAULT_LABEL ??= "Linux Default" +# UBOOT_EXTLINUX_TIMEOUT ??= "30" +# +# 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 +# TIMEOUT 30 +# DEFAULT Linux Default +# 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=${console},${baudrate}" +UBOOT_EXTLINUX_LABELS ??= "linux" +UBOOT_EXTLINUX_FDT ??= "" +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 do_create_extlinux_config() { + if d.getVar("UBOOT_EXTLINUX") != "1": + return + + if not d.getVar('WORKDIR'): + bb.error("WORKDIR not defined, unable to package") + + labels = d.getVar('UBOOT_EXTLINUX_LABELS') + 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') + if not cfile: + bb.fatal('Unable to read UBOOT_EXTLINUX_CONFIG') + + localdata = bb.data.createCopy(d) + + 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') + + timeout = localdata.getVar('UBOOT_EXTLINUX_TIMEOUT') + if timeout: + cfgfile.write('TIMEOUT %s\n' % (timeout)) + + if len(labels.split()) > 1: + default = localdata.getVar('UBOOT_EXTLINUX_DEFAULT_LABEL') + if default: + cfgfile.write('DEFAULT %s\n' % (default)) + + # Need to deconflict the labels with existing overrides + label_overrides = labels.split() + default_overrides = localdata.getVar('OVERRIDES').split(':') + # We're keeping all the existing overrides that aren't used as a label + # an override for that label will be added back in while we're processing that label + keep_overrides = list(filter(lambda x: x not in label_overrides, default_overrides)) + + for label in labels.split(): + + localdata.setVar('OVERRIDES', ':'.join(keep_overrides + [label])) + + extlinux_console = localdata.getVar('UBOOT_EXTLINUX_CONSOLE') + + menu_description = localdata.getVar('UBOOT_EXTLINUX_MENU_DESCRIPTION') + if not menu_description: + menu_description = label + + root = localdata.getVar('UBOOT_EXTLINUX_ROOT') + if not root: + bb.fatal('UBOOT_EXTLINUX_ROOT not defined') + + kernel_image = localdata.getVar('UBOOT_EXTLINUX_KERNEL_IMAGE') + fdtdir = localdata.getVar('UBOOT_EXTLINUX_FDTDIR') + + fdt = localdata.getVar('UBOOT_EXTLINUX_FDT') + + if fdt: + cfgfile.write('LABEL %s\n\tKERNEL %s\n\tFDT %s\n' % + (menu_description, kernel_image, fdt)) + elif 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') + + initrd = localdata.getVar('UBOOT_EXTLINUX_INITRD') + 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)) +} +UBOOT_EXTLINUX_VARS = "CONSOLE MENU_DESCRIPTION ROOT KERNEL_IMAGE FDTDIR FDT KERNEL_ARGS INITRD" +do_create_extlinux_config[vardeps] += "${@' '.join(['UBOOT_EXTLINUX_%s_%s' % (v, l) for v in d.getVar('UBOOT_EXTLINUX_VARS').split() for l in d.getVar('UBOOT_EXTLINUX_LABELS').split()])}" + +addtask create_extlinux_config before do_install do_deploy after do_compile |