1 inherit image
3 # Add the fstypes we need
4 IMAGE_FSTYPES_append = " tar.bz2 sdimg"
6 # Change this to match your host distro
7 LOSETUP ?= "/sbin/losetup"
9 # Since these need to go in /etc/fstab we can hardcode them
10 # Since the vars are weakly assigned, you can override them from your local.conf
11 LOOPDEV ?= "/dev/loop1"
12 LOOPDEV_BOOT ?= "/dev/loop2"
13 LOOPDEV_FS ?= "/dev/loop3"
15 IMAGE_CMD_sdimg () {
16 SDIMG=${WORKDIR}/sd.img
18 # sanity check fstab entry for boot partition mounting
19 if [ "x$(cat /etc/fstab | grep ${LOOPDEV_BOOT} | grep ${WORKDIR}/tmp-mnt-boot | grep user || true)" = "x" ]; then
20 echo "/etc/fstab entries need to be created with the user flag for the loop devices like:"
21 echo "${LOOPDEV_BOOT} ${WORKDIR}/tmp-mnt-boot msdos user 0 0"
22 false
23 fi
25 # cleanup loops
26 for loop in ${LOOPDEV} ${LOOPDEV_BOOT} ${LOOPDEV_FS} ; do
27 ${LOSETUP} -d $loop || true
28 done
30 # If an SD image is already present, reuse and reformat it
31 if [ ! -e ${SDIMG} ] ; then
32 dd if=/dev/zero of=${SDIMG} bs=$(echo '255 * 63 * 512' | bc) count=222
33 fi
35 ${LOSETUP} ${LOOPDEV} ${SDIMG}
37 # Create partition table
38 dd if=/dev/zero of=${LOOPDEV} bs=1024 count=1024
39 SIZE=$(/sbin/fdisk -l ${LOOPDEV} | grep Disk | grep bytes | awk '{print $5}')
40 CYLINDERS=$(echo $SIZE/255/63/512 | bc)
41 {
42 echo ,9,0x0C,*
43 echo ,,,-
44 } | /sbin/sfdisk -D -H 255 -S 63 -C ${CYLINDERS} ${LOOPDEV}
46 # Prepare loop devices for boot and filesystem partitions
47 BOOT_OFFSET=32256
48 FS_OFFSET_SECT=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep Linux | perl -p -i -e "s/\s+/ /"|cut -d " " -f 2)
49 FS_OFFSET=$(echo "$FS_OFFSET_SECT * 512" | bc)
50 FS_SIZE_BLOCKS=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep Linux | perl -p -i -e "s/\s+/ /g" \
51 |cut -d " " -f 4 | cut -d "+" -f 1)
53 LOOPDEV_BLOCKS=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep FAT | perl -p -i -e "s/\s+/ /g"|cut -d " " -f 5)
54 LOOPDEV_BYTES=$(echo "$LOOPDEV_BLOCKS * 1024" | bc)
56 ${LOSETUP} -d ${LOOPDEV}
58 ${LOSETUP} ${LOOPDEV_BOOT} ${SDIMG} -o ${BOOT_OFFSET}
60 /sbin/mkfs.msdos ${LOOPDEV_BOOT} -n boot $LOOPDEV_BLOCKS
62 # Prepare filesystem partition
63 # Copy ubi used by flashing scripts
64 if [ -e ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.ubi ] ; then
65 echo "Copying UBIFS image to file system"
66 cp ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.ubi ${IMAGE_ROOTFS}/boot/fs.ubi
67 fi
69 # Prepare boot partion. First mount the boot partition, and copy the boot loader and supporting files
70 # from the root filesystem
72 mkdir -p ${WORKDIR}/tmp-mnt-boot
73 mount $LOOPDEV_BOOT ${WORKDIR}/tmp-mnt-boot
75 echo "Copying bootloaders into the boot partition"
76 if [ -e ${IMAGE_ROOTFS}/boot/MLO ] ; then
77 cp -v ${IMAGE_ROOTFS}/boot/MLO ${WORKDIR}/tmp-mnt-boot
78 else
79 cp -v ${DEPLOY_DIR_IMAGE}/MLO ${WORKDIR}/tmp-mnt-boot
80 fi
82 # Check for u-boot SPL
83 if [ -e ${DEPLOY_DIR_IMAGE}/u-boot-${MACHINE}.img ] ; then
84 suffix=img
85 else
86 suffix=bin
87 fi
89 if [ -e ${IMAGE_ROOTFS}/boot/u-boot.$suffix ] ; then
90 cp -v ${IMAGE_ROOTFS}/boot/{u-boot.$suffix,user.txt,uEnv.txt} ${WORKDIR}/tmp-mnt-boot || true
91 else
92 cp -v ${DEPLOY_DIR_IMAGE}/u-boot-${MACHINE}.$suffix ${WORKDIR}/tmp-mnt-boot/u-boot.$suffix
93 fi
95 # Cleanup VFAT mount
96 echo "Cleaning up VFAT mount"
97 umount ${WORKDIR}/tmp-mnt-boot
98 ${LOSETUP} -d ${LOOPDEV_BOOT} || true
100 # Prepare ext3 parition
101 echo "Creating ext3 loopback"
102 ${LOSETUP} ${LOOPDEV_FS} ${SDIMG} -o ${FS_OFFSET}
104 # should use fdisk info
105 echo "Creating ext3 image"
106 touch ${WORKDIR}/${IMAGE_NAME}.rootfs.ext3
107 genext2fs -b $FS_SIZE_BLOCKS -d ${IMAGE_ROOTFS} ${WORKDIR}/${IMAGE_NAME}.rootfs.ext3
108 tune2fs -L ${IMAGE_NAME} -j ${WORKDIR}/${IMAGE_NAME}.rootfs.ext3
110 dd if=${WORKDIR}/${IMAGE_NAME}.rootfs.ext3 of=${LOOPDEV_FS}
112 ${LOSETUP} -d ${LOOPDEV_FS} || true
114 gzip -c ${WORKDIR}/sd.img > ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}-${PR}.img.gz
115 rm -f ${WORKDIR}/sd.img
116 }