inherit image_types # # Create an image that can by written onto a SD card using dd. # # The disk layout used is: # # 0 -> IMAGE_ROOTFS_ALIGNMENT - reserved for other data # IMAGE_ROOTFS_ALIGNMENT -> BOOT_SPACE - bootloader and/or kernel # BOOT_SPACE -> SDIMG_SIZE - rootfs # # Default Free space = 1.3x # Use IMAGE_OVERHEAD_FACTOR to add more space # <---------> # 4KiB 20MiB SDIMG_ROOTFS # <-----------------------> <----------> <----------------------> # ------------------------ ------------ ------------------------ ------------------------------- # | IMAGE_ROOTFS_ALIGNMENT | BOOT_SPACE | ROOTFS_SIZE | IMAGE_ROOTFS_ALIGNMENT | # ------------------------ ------------ ------------------------ ------------------------------- # ^ ^ ^ ^ ^ # | | | | | # 0 4096 4KiB + 20MiB 4KiB + 20Mib + SDIMG_ROOTFS 4KiB + 20MiB + SDIMG_ROOTFS + 4KiB # Boot partition volume id BOOTDD_VOLUME_ID ?= "${MACHINE}" # Boot partition size [in KiB] BOOT_SPACE ?= "20480" # Set alignment to 4MB [in KiB] IMAGE_ROOTFS_ALIGNMENT = "4096" # Use an uncompressed ext3 by default as rootfs SDIMG_ROOTFS_TYPE ?= "ext3" SDIMG_ROOTFS = "${IMAGE_NAME}.rootfs.${SDIMG_ROOTFS_TYPE}" IMAGE_DEPENDS_vexpressa9-sdimg = " \ parted-native \ mtools-native \ dosfstools-native \ virtual/kernel \ " # SD card image name SDIMG = "${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.vexpressa9-sdimg" IMAGEDATESTAMP = "${@time.strftime('%Y.%m.%d',time.gmtime())}" IMAGE_CMD_vexpressa9-sdimg () { # Align partitions BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE} + ${IMAGE_ROOTFS_ALIGNMENT} - 1) BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE_ALIGNED} - ${BOOT_SPACE_ALIGNED} % ${IMAGE_ROOTFS_ALIGNMENT}) SDIMG_SIZE=$(expr ${IMAGE_ROOTFS_ALIGNMENT} + ${BOOT_SPACE_ALIGNED} + $ROOTFS_SIZE + ${IMAGE_ROOTFS_ALIGNMENT}) # Initialize sdcard image file dd if=/dev/zero of=${SDIMG} bs=1 count=0 seek=$(expr 1024 \* ${SDIMG_SIZE}) # Create partition table parted -s ${SDIMG} mklabel msdos # Create boot partition and mark it as bootable parted -s ${SDIMG} unit KiB mkpart primary fat32 ${IMAGE_ROOTFS_ALIGNMENT} $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT}) parted -s ${SDIMG} set 1 boot on # Create rootfs partition parted -s ${SDIMG} unit KiB mkpart primary ext2 $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT}) $(expr ${BOOT_SPACE_ALIGNED} \+ ${IMAGE_ROOTFS_ALIGNMENT} \+ ${ROOTFS_SIZE}) parted ${SDIMG} print # Create a vfat image with boot files BOOT_BLOCKS=$(LC_ALL=C parted -s ${SDIMG} unit b print | awk '/ 1 / { print substr($4, 1, length($4 -1)) / 512 /2 }') if [ -f ${WORKDIR}/boot.img ]; then rm -f ${WORKDIR}/boot.img fi mkfs.vfat -n "${BOOTDD_VOLUME_ID}" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${MACHINE}.bin ::kernel.img # Add stamp file echo "${IMAGE_NAME}-${IMAGEDATESTAMP}" > ${WORKDIR}/image-version-info mcopy -i ${WORKDIR}/boot.img -v ${WORKDIR}//image-version-info :: # Burn Partitions dd if=${WORKDIR}/boot.img of=${SDIMG} conv=notrunc seek=1 bs=$(expr ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync # If SDIMG_ROOTFS_TYPE is a .xz file use xzcat if [[ "$SDIMG_ROOTFS_TYPE" == *.xz ]] then xzcat ${SDIMG_ROOTFS} | dd of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync else dd if=${SDIMG_ROOTFS} of=${SDIMG} conv=notrunc seek=1 bs=$(expr 1024 \* ${BOOT_SPACE_ALIGNED} + ${IMAGE_ROOTFS_ALIGNMENT} \* 1024) && sync && sync fi }