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uboot-extlinux-config allows to specify multiple "labels" (entries in a menu, à-la grub) and each of them have their own values for some fields. Each "base" variable, e.g. UBOOT_EXTLINUX_FDT can be overridden for each label. This is done via the OVERRIDES mechanism based on the label name, e.g. UBOOT_EXTLINUX_FDT:linux if linux is a label. However, OVERRIDES doesn't contain the label globally because it's only necessary in one task. Therefore, the OVERRIDES itself is modified within the task. This means that the sigdata will not be told the dependency on UBOOT_EXTLINUX_FDT:linux, because it cannot know about it. For this reason, we need to explicitly specify which variables this task depends on via vardeps varflag for the task. This was done in the past, but we missed updating it during the override syntax migration so the cache wouldn't get invalidated if someone modifies UBOOT_EXTLINUX_FDT:linux from a configuration file or a bbappend for example. Let's fix this by migrating it to the new syntax. (From OE-Core rev: 5570e49791b770271f176a4deeb5f6f1a028cb4a) Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> (cherry picked from commit b4dd9d873508128adbbf5ff6cf0a3df3d2ffbcf6) Signed-off-by: Steve Sakoman <steve@sakoman.com>
159 lines
6.4 KiB
Plaintext
159 lines
6.4 KiB
Plaintext
# uboot-extlinux-config.bbclass
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#
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# This class allow the extlinux.conf generation for U-Boot use. The
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# U-Boot support for it is given to allow the Generic Distribution
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# Configuration specification use by OpenEmbedded-based products.
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#
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# External variables:
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#
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# UBOOT_EXTLINUX_CONSOLE - Set to "console=ttyX" to change kernel boot
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# default console.
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# UBOOT_EXTLINUX_LABELS - A list of targets for the automatic config.
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# UBOOT_EXTLINUX_KERNEL_ARGS - Add additional kernel arguments.
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# UBOOT_EXTLINUX_KERNEL_IMAGE - Kernel image name.
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# UBOOT_EXTLINUX_FDTDIR - Device tree directory.
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# UBOOT_EXTLINUX_FDT - Device tree file.
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# UBOOT_EXTLINUX_INITRD - Indicates a list of filesystem images to
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# concatenate and use as an initrd (optional).
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# UBOOT_EXTLINUX_MENU_DESCRIPTION - Name to use as description.
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# UBOOT_EXTLINUX_ROOT - Root kernel cmdline.
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# UBOOT_EXTLINUX_TIMEOUT - Timeout before DEFAULT selection is made.
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# Measured in 1/10 of a second.
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# UBOOT_EXTLINUX_DEFAULT_LABEL - Target to be selected by default after
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# the timeout period
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#
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# If there's only one label system will boot automatically and menu won't be
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# created. If you want to use more than one labels, e.g linux and alternate,
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# use overrides to set menu description, console and others variables.
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#
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# Ex:
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#
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# UBOOT_EXTLINUX_LABELS ??= "default fallback"
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#
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# UBOOT_EXTLINUX_DEFAULT_LABEL ??= "Linux Default"
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# UBOOT_EXTLINUX_TIMEOUT ??= "30"
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#
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# UBOOT_EXTLINUX_KERNEL_IMAGE:default ??= "../zImage"
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# UBOOT_EXTLINUX_MENU_DESCRIPTION:default ??= "Linux Default"
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#
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# UBOOT_EXTLINUX_KERNEL_IMAGE:fallback ??= "../zImage-fallback"
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# UBOOT_EXTLINUX_MENU_DESCRIPTION:fallback ??= "Linux Fallback"
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#
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# Results:
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#
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# menu title Select the boot mode
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# TIMEOUT 30
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# DEFAULT Linux Default
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# LABEL Linux Default
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# KERNEL ../zImage
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# FDTDIR ../
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# APPEND root=/dev/mmcblk2p2 rootwait rw console=${console}
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# LABEL Linux Fallback
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# KERNEL ../zImage-fallback
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# FDTDIR ../
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# APPEND root=/dev/mmcblk2p2 rootwait rw console=${console}
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#
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# Copyright (C) 2016, O.S. Systems Software LTDA. All Rights Reserved
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# Released under the MIT license (see packages/COPYING)
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#
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# The kernel has an internal default console, which you can override with
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# a console=...some_tty...
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UBOOT_EXTLINUX_CONSOLE ??= "console=${console},${baudrate}"
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UBOOT_EXTLINUX_LABELS ??= "linux"
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UBOOT_EXTLINUX_FDT ??= ""
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UBOOT_EXTLINUX_FDTDIR ??= "../"
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UBOOT_EXTLINUX_KERNEL_IMAGE ??= "../${KERNEL_IMAGETYPE}"
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UBOOT_EXTLINUX_KERNEL_ARGS ??= "rootwait rw"
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UBOOT_EXTLINUX_MENU_DESCRIPTION:linux ??= "${DISTRO_NAME}"
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UBOOT_EXTLINUX_CONFIG = "${B}/extlinux.conf"
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python do_create_extlinux_config() {
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if d.getVar("UBOOT_EXTLINUX") != "1":
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return
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if not d.getVar('WORKDIR'):
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bb.error("WORKDIR not defined, unable to package")
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labels = d.getVar('UBOOT_EXTLINUX_LABELS')
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if not labels:
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bb.fatal("UBOOT_EXTLINUX_LABELS not defined, nothing to do")
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if not labels.strip():
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bb.fatal("No labels, nothing to do")
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cfile = d.getVar('UBOOT_EXTLINUX_CONFIG')
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if not cfile:
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bb.fatal('Unable to read UBOOT_EXTLINUX_CONFIG')
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localdata = bb.data.createCopy(d)
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try:
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with open(cfile, 'w') as cfgfile:
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cfgfile.write('# Generic Distro Configuration file generated by OpenEmbedded\n')
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if len(labels.split()) > 1:
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cfgfile.write('menu title Select the boot mode\n')
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timeout = localdata.getVar('UBOOT_EXTLINUX_TIMEOUT')
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if timeout:
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cfgfile.write('TIMEOUT %s\n' % (timeout))
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if len(labels.split()) > 1:
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default = localdata.getVar('UBOOT_EXTLINUX_DEFAULT_LABEL')
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if default:
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cfgfile.write('DEFAULT %s\n' % (default))
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# Need to deconflict the labels with existing overrides
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label_overrides = labels.split()
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default_overrides = localdata.getVar('OVERRIDES').split(':')
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# We're keeping all the existing overrides that aren't used as a label
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# an override for that label will be added back in while we're processing that label
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keep_overrides = list(filter(lambda x: x not in label_overrides, default_overrides))
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for label in labels.split():
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localdata.setVar('OVERRIDES', ':'.join(keep_overrides + [label]))
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extlinux_console = localdata.getVar('UBOOT_EXTLINUX_CONSOLE')
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menu_description = localdata.getVar('UBOOT_EXTLINUX_MENU_DESCRIPTION')
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if not menu_description:
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menu_description = label
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root = localdata.getVar('UBOOT_EXTLINUX_ROOT')
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if not root:
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bb.fatal('UBOOT_EXTLINUX_ROOT not defined')
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kernel_image = localdata.getVar('UBOOT_EXTLINUX_KERNEL_IMAGE')
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fdtdir = localdata.getVar('UBOOT_EXTLINUX_FDTDIR')
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fdt = localdata.getVar('UBOOT_EXTLINUX_FDT')
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if fdt:
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cfgfile.write('LABEL %s\n\tKERNEL %s\n\tFDT %s\n' %
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(menu_description, kernel_image, fdt))
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elif fdtdir:
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cfgfile.write('LABEL %s\n\tKERNEL %s\n\tFDTDIR %s\n' %
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(menu_description, kernel_image, fdtdir))
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else:
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cfgfile.write('LABEL %s\n\tKERNEL %s\n' % (menu_description, kernel_image))
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kernel_args = localdata.getVar('UBOOT_EXTLINUX_KERNEL_ARGS')
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initrd = localdata.getVar('UBOOT_EXTLINUX_INITRD')
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if initrd:
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cfgfile.write('\tINITRD %s\n'% initrd)
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kernel_args = root + " " + kernel_args
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cfgfile.write('\tAPPEND %s %s\n' % (kernel_args, extlinux_console))
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except OSError:
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bb.fatal('Unable to open %s' % (cfile))
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}
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UBOOT_EXTLINUX_VARS = "CONSOLE MENU_DESCRIPTION ROOT KERNEL_IMAGE FDTDIR FDT KERNEL_ARGS INITRD"
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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()])}"
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do_create_extlinux_config[vardepsexclude] += "OVERRIDES"
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addtask create_extlinux_config before do_install do_deploy after do_compile
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