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 # Default to 4GiB images
16 SDIMG_SIZE ?= "444"
18 BOOTPARTNAME_beaglebone = "BEAGLE_BONE"
19 BOOTPARTNAME ?= "${MACHINE}"
21 IMAGEDATESTAMP = "${@time.strftime('%Y.%m.%d',time.gmtime())}"
23 IMAGE_CMD_sdimg () {
24 SDIMG=${WORKDIR}/sd.img
26 # sanity check fstab entry for boot partition mounting
27 if [ "x$(cat /etc/fstab | grep ${LOOPDEV_BOOT} | grep ${WORKDIR}/tmp-mnt-boot | grep user || true)" = "x" ]; then
28 echo "/etc/fstab entries need to be created with the user flag for the loop devices like:"
29 echo "${LOOPDEV_BOOT} ${WORKDIR}/tmp-mnt-boot msdos user 0 0"
30 false
31 fi
33 # cleanup loops
34 for loop in ${LOOPDEV} ${LOOPDEV_BOOT} ${LOOPDEV_FS} ; do
35 ${LOSETUP} -d $loop || true
36 done
38 # If an SD image is already present, reuse and reformat it
39 if [ ! -e ${SDIMG} ] ; then
40 dd if=/dev/zero of=${SDIMG} bs=$(echo '255 * 63 * 512' | bc) count=${SDIMG_SIZE}
41 fi
43 ${LOSETUP} ${LOOPDEV} ${SDIMG}
45 # Create partition table
46 dd if=/dev/zero of=${LOOPDEV} bs=1024 count=1024
47 SIZE=$(/sbin/fdisk -l ${LOOPDEV} | grep Disk | grep bytes | awk '{print $5}')
48 CYLINDERS=$(echo $SIZE/255/63/512 | bc)
49 {
50 echo ,9,0x0C,*
51 echo ,,,-
52 } | /sbin/sfdisk -D -H 255 -S 63 -C ${CYLINDERS} ${LOOPDEV}
54 # Prepare loop devices for boot and filesystem partitions
55 BOOT_OFFSET=32256
56 FS_OFFSET_SECT=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep Linux | perl -p -i -e "s/\s+/ /"|cut -d " " -f 2)
57 FS_OFFSET=$(echo "$FS_OFFSET_SECT * 512" | bc)
58 FS_SIZE_BLOCKS=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep Linux | perl -p -i -e "s/\s+/ /g" \
59 |cut -d " " -f 4 | cut -d "+" -f 1)
61 LOOPDEV_BLOCKS=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep FAT | perl -p -i -e "s/\s+/ /g"|cut -d " " -f 5)
62 LOOPDEV_BYTES=$(echo "$LOOPDEV_BLOCKS * 1024" | bc)
64 ${LOSETUP} -d ${LOOPDEV}
66 ${LOSETUP} ${LOOPDEV_BOOT} ${SDIMG} -o ${BOOT_OFFSET}
68 /sbin/mkfs.msdos ${LOOPDEV_BOOT} -n ${BOOTPARTNAME} $LOOPDEV_BLOCKS
70 # Prepare filesystem partition
71 # Copy ubi used by flashing scripts
72 if [ -e ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.ubi ] ; then
73 echo "Copying UBIFS image to file system"
74 cp ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.ubi ${IMAGE_ROOTFS}/boot/fs.ubi
75 fi
77 # Prepare boot partion. First mount the boot partition, and copy the boot loader and supporting files
78 # from the root filesystem
80 mkdir -p ${WORKDIR}/tmp-mnt-boot
81 mount $LOOPDEV_BOOT ${WORKDIR}/tmp-mnt-boot
83 echo "Copying bootloaders into the boot partition"
84 if [ -e ${IMAGE_ROOTFS}/boot/MLO ] ; then
85 cp -v ${IMAGE_ROOTFS}/boot/MLO ${WORKDIR}/tmp-mnt-boot
86 else
87 cp -v ${DEPLOY_DIR_IMAGE}/MLO ${WORKDIR}/tmp-mnt-boot
88 fi
90 # Check for u-boot SPL
91 if [ -e ${DEPLOY_DIR_IMAGE}/u-boot-${MACHINE}.img ] ; then
92 suffix=img
93 else
94 suffix=bin
95 fi
97 cp -v ${IMAGE_ROOTFS}/boot/uEnv.txt ${WORKDIR}/tmp-mnt-boot || true
98 cp -v ${IMAGE_ROOTFS}/boot/user.txt ${WORKDIR}/tmp-mnt-boot || true
100 if [ -e ${IMAGE_ROOTFS}/boot/u-boot.$suffix ] ; then
101 cp -v ${IMAGE_ROOTFS}/boot/{u-boot.$suffix} ${WORKDIR}/tmp-mnt-boot || true
102 else
103 cp -v ${DEPLOY_DIR_IMAGE}/u-boot-${MACHINE}.$suffix ${WORKDIR}/tmp-mnt-boot/u-boot.$suffix
104 fi
106 # Cleanup VFAT mount
107 echo "Cleaning up VFAT mount"
108 umount ${WORKDIR}/tmp-mnt-boot
109 ${LOSETUP} -d ${LOOPDEV_BOOT} || true
111 # Prepare ext3 parition
112 echo "Creating ext3 loopback"
113 ${LOSETUP} ${LOOPDEV_FS} ${SDIMG} -o ${FS_OFFSET}
115 # should use fdisk info
116 echo "Creating ext3 image"
117 touch ${WORKDIR}/${IMAGE_NAME}.rootfs.ext3
118 # lots of small files, so use 8k per inode, not 64k
119 genext2fs -i 8192 -b $FS_SIZE_BLOCKS -d ${IMAGE_ROOTFS} ${WORKDIR}/${IMAGE_NAME}.rootfs.ext3
120 tune2fs -L ${IMAGE_NAME} -j ${WORKDIR}/${IMAGE_NAME}.rootfs.ext3
122 dd if=${WORKDIR}/${IMAGE_NAME}.rootfs.ext3 of=${LOOPDEV_FS}
124 ${LOSETUP} -d ${LOOPDEV_FS} || true
126 gzip -c ${WORKDIR}/sd.img > ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}-${IMAGEDATESTAMP}.img.gz
127 rm -f ${WORKDIR}/sd.img
128 }