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- # 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
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