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 LOOPDEV ?= "/dev/loop1"
11 LOOPDEV_BOOT ?= "/dev/loop2"
12 LOOPDEV_FS ?= "/dev/loop3"
14 IMAGE_CMD_sdimg () {
15 SDIMG=${WORKDIR}/sd.img
17 # sanity check fstab entry for boot partition mounting
18 if [ "x$(cat /etc/fstab | grep ${LOOPDEV_BOOT} | grep ${WORKDIR}/tmp-mnt-boot | grep user || true)" = "x" ]; then
19 echo "/etc/fstab entries need to be created with the user flag for the loop devices like:"
20 echo "${LOOPDEV_BOOT} ${WORKDIR}/tmp-mnt-boot msdos user 0 0"
21 false
22 fi
24 # cleanup loops
25 for loop in ${LOOPDEV} ${LOOPDEV_BOOT} ${LOOPDEV_FS} ; do
26 ${LOSETUP} -d $loop || true
27 done
29 # If an SD image is already present, reuse and reformat it
30 if [ ! -e ${SDIMG} ] ; then
31 dd if=/dev/zero of=${SDIMG} bs=$(echo '255 * 63 * 512' | bc) count=444
32 fi
34 ${LOSETUP} ${LOOPDEV} ${SDIMG}
36 # Create partition table
37 dd if=/dev/zero of=${LOOPDEV} bs=1024 count=1024
38 SIZE=$(/sbin/fdisk -l ${LOOPDEV} | grep Disk | grep bytes | awk '{print $5}')
39 CYLINDERS=$(echo $SIZE/255/63/512 | bc)
40 {
41 echo ,9,0x0C,*
42 echo ,,,-
43 } | /sbin/sfdisk -D -H 255 -S 63 -C ${CYLINDERS} ${LOOPDEV}
45 # Prepare loop devices for boot and filesystem partitions
46 BOOT_OFFSET=32256
47 FS_OFFSET_SECT=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep Linux | perl -p -i -e "s/\s+/ /"|cut -d " " -f 2)
48 FS_OFFSET=$(echo "$FS_OFFSET_SECT * 512" | bc)
49 FS_SIZE_BLOCKS=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep Linux | perl -p -i -e "s/\s+/ /g" \
50 |cut -d " " -f 4 | cut -d "+" -f 1)
52 LOOPDEV_BLOCKS=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep FAT | perl -p -i -e "s/\s+/ /g"|cut -d " " -f 5)
53 LOOPDEV_BYTES=$(echo "$LOOPDEV_BLOCKS * 1024" | bc)
55 ${LOSETUP} -d ${LOOPDEV}
57 ${LOSETUP} ${LOOPDEV_BOOT} ${SDIMG} -o ${BOOT_OFFSET}
59 /sbin/mkfs.msdos ${LOOPDEV_BOOT} -n boot $LOOPDEV_BLOCKS
61 # Prepare filesystem partition
62 # Copy ubi used by flashing scripts
63 if [ -e ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.ubi ] ; then
64 echo "Copying UBIFS image to file system"
65 cp ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.ubi ${IMAGE_ROOTFS}/boot/fs.ubi
66 fi
68 # Prepare boot partion. First mount the boot partition, and copy the boot loader and supporting files
69 # from the root filesystem
71 mkdir -p ${WORKDIR}/tmp-mnt-boot
72 mount $LOOPDEV_BOOT ${WORKDIR}/tmp-mnt-boot
74 echo "Copying bootloaders into the boot partition"
75 if [ -e ${IMAGE_ROOTFS}/boot/MLO ] ; then
76 cp -v ${IMAGE_ROOTFS}/boot/MLO ${WORKDIR}/tmp-mnt-boot
77 else
78 cp -v ${DEPLOY_DIR_IMAGE}/MLO ${WORKDIR}/tmp-mnt-boot
79 fi
81 # Check for u-boot SPL
82 if [ -e ${DEPLOY_DIR_IMAGE}/u-boot-${MACHINE}.img ] ; then
83 suffix=img
84 else
85 suffix=bin
86 fi
88 if [ -e ${IMAGE_ROOTFS}/boot/u-boot.$suffix ] ; then
89 cp -v ${IMAGE_ROOTFS}/boot/{u-boot.$suffix,user.txt,uEnv.txt} ${WORKDIR}/tmp-mnt-boot || true
90 else
91 cp -v ${DEPLOY_DIR_IMAGE}/u-boot-${MACHINE}.$suffix ${WORKDIR}/tmp-mnt-boot/u-boot.$suffix
92 fi
94 # Deprecated, u-boot should load it from ext3 instead
95 if [ -e ${IMAGE_ROOTFS}/boot/uImage ] ; then
96 cp -v ${IMAGE_ROOTFS}/boot/uImage ${WORKDIR}/tmp-mnt-boot
97 else
98 cp -v ${DEPLOY_DIR_IMAGE}/uImage-${MACHINE}.bin ${WORKDIR}/tmp-mnt-boot/uImage
99 fi
101 # Cleanup VFAT mount
102 echo "Cleaning up VFAT mount"
103 umount ${WORKDIR}/tmp-mnt-boot
104 ${LOSETUP} -d ${LOOPDEV_BOOT} || true
106 # Prepare ext3 parition
107 echo "Creating ext3 loopback"
108 ${LOSETUP} ${LOOPDEV_FS} ${SDIMG} -o ${FS_OFFSET}
110 # should use fdisk info
111 echo "Creating ext3 image"
112 touch ${WORKDIR}/${IMAGE_NAME}.rootfs.ext3
113 genext2fs -b $FS_SIZE_BLOCKS -d ${IMAGE_ROOTFS} ${WORKDIR}/${IMAGE_NAME}.rootfs.ext3
114 tune2fs -L ${IMAGE_NAME} -j ${WORKDIR}/${IMAGE_NAME}.rootfs.ext3
116 dd if=${WORKDIR}/${IMAGE_NAME}.rootfs.ext3 of=${LOOPDEV_FS}
118 ${LOSETUP} -d ${LOOPDEV_FS} || true
120 gzip -c ${WORKDIR}/sd.img > ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}-${PR}.img.gz
121 rm -f ${WORKDIR}/sd.img
122 }