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