diff --git a/classes/sdcard_image-rpi.bbclass b/classes/sdcard_image-rpi.bbclass index 1ac3e84..ef27ac6 100644 --- a/classes/sdcard_image-rpi.bbclass +++ b/classes/sdcard_image-rpi.bbclass @@ -1,131 +1,99 @@ -inherit image +# +# Create an image that can by written onto a SD card using dd. +# +# The disk layout used is: +# +# 0 - 1M - reserved for other data +# 1M - BOOT_SPACE - bootloader and kernel +# BOOT_SPACE - SDIMG_SIZE - rootfs +# -# Add the fstypes we need -IMAGE_FSTYPES_append = " tar.bz2 rpi-sdimg" +inherit image_types -# Ensure required utilities are present -IMAGE_DEPENDS_rpi-sdimg = "genext2fs-native e2fsprogs-native bcm2835-bootfiles bcm2835-kernel-image" +# Set kernel and boot loader +IMAGE_BOOTLOADER ?= "bcm2835-bootfiles" -# Register this as an avalable type of image. -IMAGE_TYPES_append = " rpi-sdimg" +# Default to 1.4GiB images +SDIMG_SIZE ?= "4000" -# Change this to match your host distro -LOSETUP ?= "/sbin/losetup" +# Boot partition volume id +BOOTDD_VOLUME_ID ?= "${MACHINE}" -# Since these need to go in /etc/fstab we can hardcode them -# Since the vars are weakly assigned, you can override them from your local.conf -LOOPDEV ?= "/dev/loop1" -LOOPDEV_BOOT ?= "/dev/loop2" -LOOPDEV_FS ?= "/dev/loop3" +# Addional space for boot partition +BOOT_SPACE ?= "20MiB" -# Default to 4GiB images -SDIMG_SIZE ?= "444" +# Use an ext3 by default as rootfs +SDIMG_ROOTFS_TYPE ?= "ext3" +SDIMG_ROOTFS = "${IMAGE_NAME}.rootfs.${SDIMG_ROOTFS_TYPE}" -# FS type for rootfs -ROOTFSTYPE ?= "ext4" +# Set GPU firmware image to be used +# arm128 : 128M ARM, 128M GPU split +# arm192 : 192M ARM, 64M GPU split +# arm224 : 224M ARM, 32M GPU split +RPI_GPU_FIRMWARE ?= "arm192" -BOOTPARTNAME ?= "${MACHINE}" +IMAGE_DEPENDS_rpi-sdimg = " \ + parted-native \ + mtools-native \ + dosfstools-native \ + virtual/kernel \ + ${IMAGE_BOOTLOADER} \ + " -IMAGEDATESTAMP = "${@time.strftime('%Y.%m.%d',time.gmtime())}" +# SD card image name +SDIMG = "${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.rpi-sdimg" # Additional files and/or directories to be copied into the vfat partition from the IMAGE_ROOTFS. FATPAYLOAD ?= "" +IMAGEDATESTAMP = "${@time.strftime('%Y.%m.%d',time.gmtime())}" + IMAGE_CMD_rpi-sdimg () { - SDIMG=${WORKDIR}/sd.img - - # sanity check fstab entry for boot partition mounting - if [ "x$(cat /etc/fstab | grep ${LOOPDEV_BOOT} | grep ${WORKDIR}/tmp-mnt-boot | grep user || true)" = "x" ]; then - echo "/etc/fstab entries need to be created with the user flag for the loop devices like:" - echo "${LOOPDEV_BOOT} ${WORKDIR}/tmp-mnt-boot vfat user 0 0" - false - fi - - # cleanup loops - for loop in ${LOOPDEV} ${LOOPDEV_BOOT} ${LOOPDEV_FS} ; do - ${LOSETUP} -d $loop || true - done - - # If an SD image is already present, reuse and reformat it - if [ ! -e ${SDIMG} ] ; then - dd if=/dev/zero of=${SDIMG} bs=$(echo '255 * 63 * 512' | bc) count=${SDIMG_SIZE} - fi - - ${LOSETUP} ${LOOPDEV} ${SDIMG} + # Initialize sdcard image file + dd if=/dev/zero of=${SDIMG} bs=1 count=0 seek=$(expr 1000 \* 1000 \* ${SDIMG_SIZE}) # Create partition table - dd if=/dev/zero of=${LOOPDEV} bs=1024 count=1024 - SIZE=$(/sbin/fdisk -l ${LOOPDEV} | grep Disk | grep bytes | awk '{print $5}') - CYLINDERS=$(echo $SIZE/255/63/512 | bc) - { - echo ,9,0x0C,* - echo ,,,- - } | /sbin/sfdisk -D -H 255 -S 63 -C ${CYLINDERS} ${LOOPDEV} + parted -s ${SDIMG} mklabel msdos + # Create boot partition and mark it as bootable + parted -s ${SDIMG} mkpart primary fat32 1MiB ${BOOT_SPACE} + parted -s ${SDIMG} set 1 boot on + # Create rootfs partition + parted -s ${SDIMG} mkpart primary ext2 ${BOOT_SPACE} 100% + parted ${SDIMG} print - # Prepare loop devices for boot and filesystem partitions - BOOT_OFFSET=32256 - FS_OFFSET_SECT=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep Linux | perl -p -i -e "s/\s+/ /"|cut -d " " -f 2) - FS_OFFSET=$(echo "$FS_OFFSET_SECT * 512" | bc) - FS_SIZE_BLOCKS=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep Linux | perl -p -i -e "s/\s+/ /g" \ - |cut -d " " -f 4 | cut -d "+" -f 1) - - LOOPDEV_BLOCKS=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep FAT | perl -p -i -e "s/\s+/ /g"|cut -d " " -f 5) - LOOPDEV_BYTES=$(echo "$LOOPDEV_BLOCKS * 1024" | bc) + # Create a vfat image with boot files + BOOT_BLOCKS=$(LC_ALL=C parted -s ${SDIMG} unit b print | awk '/ 1 / { print substr($4, 1, length($4 -1)) / 512 /2 }') + mkfs.vfat -n "${BOOTDD_VOLUME_ID}" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS + case "${RPI_GPU_FIRMWARE}" in + "arm128" | "arm192" | "arm224") + mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/bcm2835-bootfiles/${RPI_GPU_FIRMWARE}_start.elf ::start.elf + ;; + *) + bberror "RPI_GPU_FIRMWARE is undefined or value not recongnised. Possible values: arm128, arm192 or arm224." + exit 1 + ;; + esac - ${LOSETUP} -d ${LOOPDEV} - - ${LOSETUP} ${LOOPDEV_BOOT} ${SDIMG} -o ${BOOT_OFFSET} - - /sbin/mkfs.vfat ${LOOPDEV_BOOT} -n ${BOOTPARTNAME} $LOOPDEV_BLOCKS - - # Prepare boot partion. First mount the boot partition, and copy the bootloader and supporting files. - - mkdir -p ${WORKDIR}/tmp-mnt-boot - mount $LOOPDEV_BOOT ${WORKDIR}/tmp-mnt-boot - - echo "Copying bootloader and prepended kernel.img into the boot partition" - cp -v ${DEPLOY_DIR_IMAGE}/bcm2835-bootfiles/* ${WORKDIR}/tmp-mnt-boot || true + # To do + # Copy here a cmdline.txt file generated taking into consideration the partition type + # of the rootfs + mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/bcm2835-bootfiles/bootcode.bin :: + mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/bcm2835-bootfiles/loader.bin :: + mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/bcm2835-bootfiles/kernel.img :: if [ -n ${FATPAYLOAD} ] ; then echo "Copying payload into VFAT" for entry in ${FATPAYLOAD} ; do # add the || true to stop aborting on vfat issues like not supporting .~lock files - cp -av ${IMAGE_ROOTFS}$entry ${WORKDIR}/tmp-mnt-boot || true + mcopy -i ${WORKDIR}/boot.img -s -v ${IMAGE_ROOTFS}$entry :: || true done fi - echo "${IMAGE_NAME}-${IMAGEDATESTAMP}" > ${IMAGE_ROOTFS}/etc/image-version-info - - cp -v ${IMAGE_ROOTFS}/etc/image-version-info ${WORKDIR}/tmp-mnt-boot || true + # Add stamp file + echo "${IMAGE_NAME}-${IMAGEDATESTAMP}" > ${WORKDIR}/image-version-info + mcopy -i ${WORKDIR}/boot.img -v ${WORKDIR}//image-version-info :: - # Cleanup VFAT mount - echo "Cleaning up VFAT mount" - umount ${WORKDIR}/tmp-mnt-boot - ${LOSETUP} -d ${LOOPDEV_BOOT} || true - - # Prepare rootfs parition - echo "Creating rootfs loopback" - ${LOSETUP} ${LOOPDEV_FS} ${SDIMG} -o ${FS_OFFSET} - - FS_NUM_INODES=$(echo $FS_SIZE_BLOCKS / 4 | bc) - - case "${ROOTFSTYPE}" in - ext3) - genext2fs -z -N $FS_NUM_INODES -b $FS_SIZE_BLOCKS -d ${IMAGE_ROOTFS} ${LOOPDEV_FS} - tune2fs -L ${IMAGE_NAME} -j ${LOOPDEV_FS} - ;; - ext4) - genext2fs -z -N $FS_NUM_INODES -b $FS_SIZE_BLOCKS -d ${IMAGE_ROOTFS} ${LOOPDEV_FS} - tune2fs -L ${IMAGE_NAME} -j -O extents,uninit_bg,dir_index ${LOOPDEV_FS} - ;; - *) - echo "Please set ROOTFSTYPE to something supported" - exit 1 - ;; - esac - - ${LOSETUP} -d ${LOOPDEV_FS} || true - - gzip -c ${WORKDIR}/sd.img > ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}-${IMAGEDATESTAMP}.img.gz - rm -f ${WORKDIR}/sd.img + # Burn Partitions + dd if=${WORKDIR}/boot.img of=${SDIMG} conv=notrunc seek=1 bs=1M && sync && sync + dd if=${SDIMG_ROOTFS} of=${SDIMG} conv=notrunc seek=1 bs=${BOOT_SPACE} && sync && sync }