classes/n2100-image.bbclass

   1 n2100_pack_image() {
   2         # find latest kernel
   3         KERNEL=`ls -tr ${DEPLOY_DIR_IMAGE}/zImage* | tail -n 1`
   4         if [ -z "$KERNEL" ]; then
   5                 oefatal "No kernel found in ${DEPLOY_DIR_IMAGE}. Bitbake linux to create one."
   6                 exit 1
   7         fi
   8         ROOTFS=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.jffs2
   9         OUTPUT=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.flash.img
  10         PADFILE=${DEPLOY_DIR_IMAGE}/padfile.zzz
  11         HEX_MAX_KERN_SIZE=1C0000
  12         DEC_MAX_KERN_SIZE=`echo "ibase=16; $HEX_MAX_KERN_SIZE" | bc `
  13         HEX_MAX_ROOT_SIZE=DC0000
  14         DEC_MAX_ROOT_SIZE=`echo "ibase=16; $HEX_MAX_ROOT_SIZE" | bc `
  15         KERNEL_SIZE=`ls -l $KERNEL | awk '{print $5}'`
  16         if [ $KERNEL_SIZE -gt $DEC_MAX_KERN_SIZE ]; then
  17                 oefatal "Kernel too large at $KERNEL_SIZE bytes.  Max is $DEC_MAX_KERN_SIZE."
  18                 exit 1
  19         fi
  20         ROOT_SIZE=`ls -l $ROOTFS | awk '{print $5}'`
  21         if [ $ROOT_SIZE -gt $DEC_MAX_ROOT_SIZE ]; then
  22                 oefatal "Rootfs is too large at $ROOT_SIZE bytes.  Max is $DEC_MAX_ROOT_SIZE."
  23                 exit 1
  24         fi
  25         PAD_SIZE=`echo "$DEC_MAX_KERN_SIZE - $KERNEL_SIZE" | bc `
  26         dd if=/dev/zero of=$PADFILE bs=$PAD_SIZE count=1 2>>/dev/null
  27         cat $KERNEL $PADFILE $ROOTFS > $OUTPUT
  28         rm -f $PADFILE
  29         ls -l $OUTPUT
  30 }
  31
  32 IMAGE_POSTPROCESS_COMMAND += "n2100_pack_image; "