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Using the latest mkisofs it is possible to generate 3 different types
of ISO images, which can be used in various scenarios.
1) PCBIOS Only ISO
- This option remains unchanged by this commit
- Uses syslinux menus
- Can be directly copied with dd to a USB device
- Can be burned to optical media
2) EFI Only ISO
- Uses grub 2 menus
- Can be burned to optical media
- If you want to use this image on a USB device
extra steps must be taken in order to format the USB
device with fat32, and copy an EFI loader which will
in turn load the iso image
3) PCBIOS / EFI ISO
- This is a hybrid image ISO that will work for case 1 or 2
as above with the same restrictions and boot menu types
depending on what type of firmware is installed on
the hardware or depending on if EFI or "Legacy Boot" is
enabled on some UEFI firmwares.
The syslinux.bbclass is now always required because that is where the
isohybrid dependencies come from as well as the configuration data for
the isohybrid. The isohybrid is the secret sauce which allows the ISO
to work as optical media or as a disk image on USB or a HDD/SSD.
[YOCTO #4100]
(From OE-Core rev: a4baf911ab9d306ce5200e7d794ed6a9ccb25f30)
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
127 lines
3.5 KiB
Plaintext
127 lines
3.5 KiB
Plaintext
# grub-efi.bbclass
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# Copyright (c) 2011, Intel Corporation.
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# All rights reserved.
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#
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# Released under the MIT license (see packages/COPYING)
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# Provide grub-efi specific functions for building bootable images.
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# External variables
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# ${INITRD} - indicates a filesystem image to use as an initrd (optional)
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# ${ROOTFS} - indicates a filesystem image to include as the root filesystem (optional)
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# ${LABELS} - a list of targets for the automatic config
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# ${APPEND} - an override list of append strings for each label
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# ${GRUB_OPTS} - additional options to add to the config, ';' delimited # (optional)
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# ${GRUB_TIMEOUT} - timeout before executing the deault label (optional)
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do_bootimg[depends] += "grub-efi-${TRANSLATED_TARGET_ARCH}-native:do_deploy"
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GRUBCFG = "${S}/grub.cfg"
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GRUB_TIMEOUT ?= "10"
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#FIXME: build this from the machine config
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GRUB_OPTS ?= "serial --unit=0 --speed=115200 --word=8 --parity=no --stop=1"
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EFIDIR = "/EFI/BOOT"
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grubefi_populate() {
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# DEST must be the root of the image so that EFIDIR is not
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# nested under a top level directory.
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DEST=$1
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install -d ${DEST}${EFIDIR}
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GRUB_IMAGE="bootia32.efi"
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if [ "${TARGET_ARCH}" = "x86_64" ]; then
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GRUB_IMAGE="bootx64.efi"
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fi
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install -m 0644 ${DEPLOY_DIR_IMAGE}/${GRUB_IMAGE} ${DEST}${EFIDIR}
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install -m 0644 ${GRUBCFG} ${DEST}${EFIDIR}
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}
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grubefi_iso_populate() {
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grubefi_populate ${ISODIR}
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# Build a EFI directory to create efi.img
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mkdir -p ${EFIIMGDIR}/${EFIDIR}
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cp ${ISODIR}/${EFIDIR}/* ${EFIIMGDIR}${EFIDIR}
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cp ${ISODIR}/vmlinuz ${EFIIMGDIR}
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echo "EFI\\BOOT\\${GRUB_IMAGE}" > ${EFIIMGDIR}/startup.nsh
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if [ -f "${ISODIR}/initrd" ] ; then
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cp ${ISODIR}/initrd ${EFIIMGDIR}
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fi
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}
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grubefi_hddimg_populate() {
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grubefi_populate ${HDDDIR}
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}
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python build_grub_cfg() {
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import sys
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workdir = d.getVar('WORKDIR', True)
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if not workdir:
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bb.error("WORKDIR not defined, unable to package")
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return
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labels = d.getVar('LABELS', True)
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if not labels:
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bb.debug(1, "LABELS not defined, nothing to do")
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return
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if labels == []:
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bb.debug(1, "No labels, nothing to do")
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return
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cfile = d.getVar('GRUBCFG', True)
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if not cfile:
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raise bb.build.FuncFailed('Unable to read GRUBCFG')
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try:
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cfgfile = file(cfile, 'w')
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except OSError:
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raise bb.build.funcFailed('Unable to open %s' % (cfile))
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cfgfile.write('# Automatically created by OE\n')
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opts = d.getVar('GRUB_OPTS', True)
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if opts:
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for opt in opts.split(';'):
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cfgfile.write('%s\n' % opt)
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cfgfile.write('default=%s\n' % (labels.split()[0]))
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timeout = d.getVar('GRUB_TIMEOUT', True)
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if timeout:
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cfgfile.write('timeout=%s\n' % timeout)
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else:
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cfgfile.write('timeout=50\n')
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for label in labels.split():
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localdata = d.createCopy()
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overrides = localdata.getVar('OVERRIDES', True)
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if not overrides:
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raise bb.build.FuncFailed('OVERRIDES not defined')
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localdata.setVar('OVERRIDES', label + ':' + overrides)
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bb.data.update_data(localdata)
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cfgfile.write('\nmenuentry \'%s\'{\n' % (label))
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if label == "install":
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label = "install-efi"
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cfgfile.write('linux /vmlinuz LABEL=%s' % (label))
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append = localdata.getVar('APPEND', True)
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initrd = localdata.getVar('INITRD', True)
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if append:
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cfgfile.write('%s' % (append))
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cfgfile.write('\n')
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if initrd:
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cfgfile.write('initrd /initrd')
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cfgfile.write('\n}\n')
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cfgfile.close()
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}
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