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, but use 2GiB images for beaglebone
16 SDIMG_SIZE ?= "444"
17 SDIMG_SIZE_beaglebone = "222"
19 IMAGE_CMD_sdimg () {
20 SDIMG=${WORKDIR}/sd.img
22 # sanity check fstab entry for boot partition mounting
23 if [ "x$(cat /etc/fstab | grep ${LOOPDEV_BOOT} | grep ${WORKDIR}/tmp-mnt-boot | grep user || true)" = "x" ]; then
24 echo "/etc/fstab entries need to be created with the user flag for the loop devices like:"
25 echo "${LOOPDEV_BOOT} ${WORKDIR}/tmp-mnt-boot msdos user 0 0"
26 false
27 fi
29 # cleanup loops
30 for loop in ${LOOPDEV} ${LOOPDEV_BOOT} ${LOOPDEV_FS} ; do
31 ${LOSETUP} -d $loop || true
32 done
34 # If an SD image is already present, reuse and reformat it
35 if [ ! -e ${SDIMG} ] ; then
36 dd if=/dev/zero of=${SDIMG} bs=$(echo '255 * 63 * 512' | bc) count=${SDIMG_SIZE}
37 fi
39 ${LOSETUP} ${LOOPDEV} ${SDIMG}
41 # Create partition table
42 dd if=/dev/zero of=${LOOPDEV} bs=1024 count=1024
43 SIZE=$(/sbin/fdisk -l ${LOOPDEV} | grep Disk | grep bytes | awk '{print $5}')
44 CYLINDERS=$(echo $SIZE/255/63/512 | bc)
45 {
46 echo ,9,0x0C,*
47 echo ,,,-
48 } | /sbin/sfdisk -D -H 255 -S 63 -C ${CYLINDERS} ${LOOPDEV}
50 # Prepare loop devices for boot and filesystem partitions
51 BOOT_OFFSET=32256
52 FS_OFFSET_SECT=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep Linux | perl -p -i -e "s/\s+/ /"|cut -d " " -f 2)
53 FS_OFFSET=$(echo "$FS_OFFSET_SECT * 512" | bc)
54 FS_SIZE_BLOCKS=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep Linux | perl -p -i -e "s/\s+/ /g" \
55 |cut -d " " -f 4 | cut -d "+" -f 1)
57 LOOPDEV_BLOCKS=$(/sbin/fdisk -l -u ${LOOPDEV} 2>&1 | grep FAT | perl -p -i -e "s/\s+/ /g"|cut -d " " -f 5)
58 LOOPDEV_BYTES=$(echo "$LOOPDEV_BLOCKS * 1024" | bc)
60 ${LOSETUP} -d ${LOOPDEV}
62 ${LOSETUP} ${LOOPDEV_BOOT} ${SDIMG} -o ${BOOT_OFFSET}
64 /sbin/mkfs.msdos ${LOOPDEV_BOOT} -n boot $LOOPDEV_BLOCKS
66 # Prepare filesystem partition
67 # Copy ubi used by flashing scripts
68 if [ -e ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.ubi ] ; then
69 echo "Copying UBIFS image to file system"
70 cp ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.ubi ${IMAGE_ROOTFS}/boot/fs.ubi
71 fi
73 # Prepare boot partion. First mount the boot partition, and copy the boot loader and supporting files
74 # from the root filesystem
76 mkdir -p ${WORKDIR}/tmp-mnt-boot
77 mount $LOOPDEV_BOOT ${WORKDIR}/tmp-mnt-boot
79 echo "Copying bootloaders into the boot partition"
80 if [ -e ${IMAGE_ROOTFS}/boot/MLO ] ; then
81 cp -v ${IMAGE_ROOTFS}/boot/MLO ${WORKDIR}/tmp-mnt-boot
82 else
83 cp -v ${DEPLOY_DIR_IMAGE}/MLO ${WORKDIR}/tmp-mnt-boot
84 fi
86 # Check for u-boot SPL
87 if [ -e ${DEPLOY_DIR_IMAGE}/u-boot-${MACHINE}.img ] ; then
88 suffix=img
89 else
90 suffix=bin
91 fi
93 if [ -e ${IMAGE_ROOTFS}/boot/u-boot.$suffix ] ; then
94 cp -v ${IMAGE_ROOTFS}/boot/{u-boot.$suffix,user.txt,uEnv.txt} ${WORKDIR}/tmp-mnt-boot || true
95 else
96 cp -v ${DEPLOY_DIR_IMAGE}/u-boot-${MACHINE}.$suffix ${WORKDIR}/tmp-mnt-boot/u-boot.$suffix
97 fi
99 # Cleanup VFAT mount
100 echo "Cleaning up VFAT mount"
101 umount ${WORKDIR}/tmp-mnt-boot
102 ${LOSETUP} -d ${LOOPDEV_BOOT} || true
104 # Prepare ext3 parition
105 echo "Creating ext3 loopback"
106 ${LOSETUP} ${LOOPDEV_FS} ${SDIMG} -o ${FS_OFFSET}
108 # should use fdisk info
109 echo "Creating ext3 image"
110 touch ${WORKDIR}/${IMAGE_NAME}.rootfs.ext3
111 genext2fs -b $FS_SIZE_BLOCKS -d ${IMAGE_ROOTFS} ${WORKDIR}/${IMAGE_NAME}.rootfs.ext3
112 tune2fs -L ${IMAGE_NAME} -j ${WORKDIR}/${IMAGE_NAME}.rootfs.ext3
114 dd if=${WORKDIR}/${IMAGE_NAME}.rootfs.ext3 of=${LOOPDEV_FS}
116 ${LOSETUP} -d ${LOOPDEV_FS} || true
118 gzip -c ${WORKDIR}/sd.img > ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}-${PR}.img.gz
119 rm -f ${WORKDIR}/sd.img
120 }