95 lines
2.9 KiB
Plaintext
95 lines
2.9 KiB
Plaintext
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# boot-directdisk.bbclass
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# (loosly based off bootimg.bbclass Copyright (C) 2004, Advanced Micro Devices, Inc.)
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#
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# Create an image which can be placed directly onto a harddisk using dd and then
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# booted.
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#
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# This uses syslinux. extlinux would have been nice but required the ext2/3
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# partition to be mounted. grub requires to run itself as part of the install
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# process.
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#
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# The end result is a 512 boot sector populated with an MBR and partition table
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# followed by an msdos fat16 partition containing syslinux and a linux kernel
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# completed by the ext2/3 rootfs.
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#
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# We have to push the msdos parition table size > 16MB so fat 16 is used as parted
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# won't touch fat12 partitions.
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# External variables needed
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# ${ROOTFS} - the rootfs image to incorporate
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do_bootdirectdisk[depends] += "dosfstools-native:do_populate_sysroot \
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syslinux:do_populate_sysroot \
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syslinux-native:do_populate_sysroot \
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parted-native:do_populate_sysroot \
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mtools-native:do_populate_sysroot "
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PACKAGES = " "
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EXCLUDE_FROM_WORLD = "1"
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HDDDIR = "${S}/hdd/boot"
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HDDIMG = "${S}/hdd.image"
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BOOTDD_VOLUME_ID ?= "boot"
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BOOTDD_EXTRA_SPACE ?= "16384"
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# Get the build_syslinux_cfg() function from the syslinux class
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AUTO_SYSLINUXCFG = "1"
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LABELS = "boot"
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APPEND = "root=/dev/sda2"
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TIMEOUT = "10"
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SYSLINUXCFG = "${HDDDIR}/syslinux.cfg"
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SYSLINUXMENU = "${HDDDIR}/menu"
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inherit syslinux
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build_boot_dd() {
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IMAGE=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.hdddirect
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install -d ${HDDDIR}
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install -m 0644 ${STAGING_DIR_HOST}/kernel/bzImage ${HDDDIR}/vmlinuz
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install -m 444 ${STAGING_LIBDIR}/syslinux/ldlinux.sys ${HDDDIR}/ldlinux.sys
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BLOCKS=`du -bks ${HDDDIR} | cut -f 1`
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SIZE=`expr $BLOCKS + ${BOOTDD_EXTRA_SPACE}`
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mkdosfs -n ${BOOTDD_VOLUME_ID} -d ${HDDDIR} -C ${HDDIMG} $SIZE
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syslinux ${HDDIMG}
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chmod 644 ${HDDIMG}
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ROOTFSBLOCKS=`du -Lbks ${ROOTFS} | cut -f 1`
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TOTALSIZE=`expr $SIZE + $ROOTFSBLOCKS`
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END1=`expr $SIZE \* 1024`
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END2=`expr $END1 + 512`
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END3=`expr \( $ROOTFSBLOCKS \* 1024 \) + $END1`
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echo $ROOTFSBLOCKS $TOTALSIZE $END1 $END2 $END3
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rm -rf $IMAGE
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dd if=/dev/zero of=$IMAGE bs=1024 seek=$TOTALSIZE count=1
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parted $IMAGE mklabel msdos
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parted $IMAGE mkpart primary fat16 0 ${END1}B
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parted $IMAGE unit B mkpart primary ext2 ${END2}B ${END3}B
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parted $IMAGE set 1 boot on
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parted $IMAGE print
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OFFSET=`expr $END2 / 512`
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dd if=${STAGING_LIBDIR}/syslinux/mbr.bin of=$IMAGE conv=notrunc
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dd if=${HDDIMG} of=$IMAGE conv=notrunc seek=1 bs=512
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dd if=${ROOTFS} of=$IMAGE conv=notrunc seek=$OFFSET bs=512
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cd ${DEPLOY_DIR_IMAGE}
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rm -f ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.hdddirect
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ln -s ${IMAGE_NAME}.hdddirect ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.hdddirect
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}
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python do_bootdirectdisk() {
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bb.build.exec_func('build_syslinux_cfg', d)
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bb.build.exec_func('build_boot_dd', d)
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}
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addtask bootdirectdisk before do_build
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do_bootdirectdisk[nostamp] = "1"
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