Tested with 3 different beagleboard image release builds so far
For ideas, referenced Narcissus image builder written by Koen Kooi
<k-k...@ti.com>
Signed-off-by: Joel A Fernandes <joelag...@ti.com>
---
classes/sdcard_image.bbclass | 78 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 78 insertions(+), 0 deletions(-)
create mode 100644 classes/sdcard_image.bbclass
diff --git a/classes/sdcard_image.bbclass b/classes/sdcard_image.bbclass
new file mode 100644
index 0000000..b3885df
--- /dev/null
+++ b/classes/sdcard_image.bbclass
@@ -0,0 +1,78 @@
+inherit image
+
+IMAGE_CMD_sdimg () {
+ SDIMG=${WORKDIR}/sd.img
+
+ # cleanup loops
+ for loop in $(losetup -j ${SDIMG}); do
+ loop_dev=$(echo $loop|cut -d ":" -f 1)
+ umount $loop_dev || true
+ losetup -d $loop_dev || true
+ done
+
+ dd if=/dev/zero of=${SDIMG} bs=4k seek=$(echo '256 * 1024' | bc) count=1
+ losetup -f ${SDIMG}
+ LOOPDEV=$(losetup -j ${SDIMG} -o 0 | cut -d ":" -f 1)
+
+ # Create partition table
+ dd if=/dev/zero of=${LOOPDEV} bs=1024 count=1024
+ SIZE=`fdisk -l ${LOOPDEV} | grep Disk | grep bytes | awk '{print $5}'`
+ CYLINDERS=`echo $SIZE/255/63/512 | bc`
+ {
+ echo ,9,0x0C,*
+ echo ,,,-
+ } | sfdisk -D -H 255 -S 63 -C ${CYLINDERS} ${LOOPDEV}
+
+ # Prepare loop devices for boot and filesystem partitions
+ BOOT_OFFSET=32256
+ FS_OFFSET_SECT=$(/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)
+
+ losetup -f ${SDIMG} -o ${BOOT_OFFSET} --sizelimit=$LOOPDEV_BYTES
+
+ LOOPDEV_BOOT=$(losetup -j ${SDIMG} -o ${BOOT_OFFSET} | cut -d ":" -f 1)
+ mkfs.msdos ${LOOPDEV_BOOT} -n boot
+
+ losetup -f ${SDIMG} -o ${FS_OFFSET}
+ LOOPDEV_FS=$(losetup -j ${SDIMG} -o ${FS_OFFSET} | cut -d ":" -f 1)
+
+ # Prepare filesystem partition
+ # Copy ubi used by flashing scripts
+ if [ -e ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.ubi ] ; then
+ echo "Copying UBIFS image to file system"
+ cp ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.ubi
${IMAGE_ROOTFS}/boot/fs.ubi
+ fi
+ ROOTFS_SIZE="$(du -ks ${IMAGE_ROOTFS} | awk '{print 65536 + $1}')"
+ genext2fs -b ${FS_SIZE_BLOCKS} -d ${IMAGE_ROOTFS} ${LOOPDEV_FS}
+ tune2fs -j ${LOOPDEV_FS}
+
+ # Prepare boot partion. First mount the boot partition, and copy the
boot loader and supporting files
+ # from the root filesystem
+
+ # sanity check fstab entry for boot partition mounting
+ if [ "x$(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 $LOOPDEV_BOOT like:"
+ echo "$LOOPDEV_BOOT ${WORKDIR}/tmp-mnt-boot msdos user 0 0"
+ false
+ fi
+
+ mkdir -p ${WORKDIR}/tmp-mnt-boot
+ mount $LOOPDEV_BOOT
+
+ echo "Copying bootloaders into the boot partition"
+ cp -v ${IMAGE_ROOTFS}/boot/MLO ${WORKDIR}/tmp-mnt-boot
+ cp -v ${IMAGE_ROOTFS}/boot/{u-boot.bin,user.txt,uEnv.txt}
${WORKDIR}/tmp-mnt-boot || true
+
+ # cleanup
+ umount ${LOOPDEV_BOOT}
+ /sbin/losetup -d ${LOOPDEV}
+ /sbin/losetup -d ${LOOPDEV_BOOT}
+ /sbin/losetup -d ${LOOPDEV_FS}
+
+ gzip -c ${WORKDIR}/sd.img >
${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}-${PR}.img.gz
+}
--
1.7.0.4
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