scripts/mkits.sh

   1 #!/bin/sh
   2 #
   3 # Licensed under the terms of the GNU GPL License version 2 or later.
   4 #
   5 # Author: Peter Tyser <ptyser@xes-inc.com>
   6 #
   7 # U-Boot firmware supports the booting of images in the Flattened Image
   8 # Tree (FIT) format.  The FIT format uses a device tree structure to
   9 # describe a kernel image, device tree blob, ramdisk, etc.  This script
  10 # creates an Image Tree Source (.its file) which can be passed to the
  11 # 'mkimage' utility to generate an Image Tree Blob (.itb file).  The .itb
  12 # file can then be booted by U-Boot (or other bootloaders which support
  13 # FIT images).  See doc/uImage.FIT/howto.txt in U-Boot source code for
  14 # additional information on FIT images.
  15 #
  16
  17 usage() {
  18         printf "Usage: %s -A arch -C comp -a addr -e entry -v version"\
  19                  "-k kernel [-D name -d dtb] -o its_file" "$(basename $0)"
  20         printf "\n\t-A ==> set architecture to 'arch'"
  21         printf "\n\t-C ==> set compression type 'comp'"
  22         printf "\n\t-c ==> set config name 'config'"
  23         printf "\n\t-a ==> set load address to 'addr' (hex)"
  24         printf "\n\t-e ==> set entry point to 'entry' (hex)"
  25         printf "\n\t-v ==> set kernel version to 'version'"
  26         printf "\n\t-k ==> include kernel image 'kernel'"
  27         printf "\n\t-D ==> human friendly Device Tree Blob 'name'"
  28         printf "\n\t-d ==> include Device Tree Blob 'dtb'"
  29         printf "\n\t-o ==> create output file 'its_file'\n"
  30         exit 1
  31 }
  32
  33 while getopts ":A:a:c:C:D:d:e:k:o:v:" OPTION
  34 do
  35         case $OPTION in
  36                 A ) ARCH=$OPTARG;;
  37                 a ) LOAD_ADDR=$OPTARG;;
  38                 c ) CONFIG=$OPTARG;;
  39                 C ) COMPRESS=$OPTARG;;
  40                 D ) DEVICE=$OPTARG;;
  41                 d ) DTB=$OPTARG;;
  42                 e ) ENTRY_ADDR=$OPTARG;;
  43                 k ) KERNEL=$OPTARG;;
  44                 o ) OUTPUT=$OPTARG;;
  45                 v ) VERSION=$OPTARG;;
  46                 * ) echo "Invalid option passed to '$0' (options:$*)"
  47                 usage;;
  48         esac
  49 done
  50
  51 # Make sure user entered all required parameters
  52 if [ -z "${ARCH}" ] || [ -z "${COMPRESS}" ] || [ -z "${LOAD_ADDR}" ] || \
  53         [ -z "${ENTRY_ADDR}" ] || [ -z "${VERSION}" ] || [ -z "${KERNEL}" ] || \
  54         [ -z "${OUTPUT}" ] || [ -z "${CONFIG}" ]; then
  55         usage
  56 fi
  57
  58 ARCH_UPPER=$(echo "$ARCH" | tr '[:lower:]' '[:upper:]')
  59
  60 # Conditionally create fdt information
  61 if [ -n "${DTB}" ]; then
  62         FDT_NODE="
  63                 fdt@1 {
  64                         description = \"${ARCH_UPPER} OpenWrt ${DEVICE} device tree blob\";
  65                         data = /incbin/(\"${DTB}\");
  66                         type = \"flat_dt\";
  67                         arch = \"${ARCH}\";
  68                         compression = \"none\";
  69                         hash@1 {
  70                                 algo = \"crc32\";
  71                         };
  72                         hash@2 {
  73                                 algo = \"sha1\";
  74                         };
  75                 };
  76 "
  77         FDT_PROP="fdt = \"fdt@1\";"
  78 fi
  79
  80 # Create a default, fully populated DTS file
  81 DATA="/dts-v1/;
  82
  83 / {
  84         description = \"${ARCH_UPPER} OpenWrt FIT (Flattened Image Tree)\";
  85         #address-cells = <1>;
  86
  87         images {
  88                 kernel@1 {
  89                         description = \"${ARCH_UPPER} OpenWrt Linux-${VERSION}\";
  90                         data = /incbin/(\"${KERNEL}\");
  91                         type = \"kernel\";
  92                         arch = \"${ARCH}\";
  93                         os = \"linux\";
  94                         compression = \"${COMPRESS}\";
  95                         load = <${LOAD_ADDR}>;
  96                         entry = <${ENTRY_ADDR}>;
  97                         hash@1 {
  98                                 algo = \"crc32\";
  99                         };
 100                         hash@2 {
 101                                 algo = \"sha1\";
 102                         };
 103                 };
 104 ${FDT_NODE}
 105         };
 106
 107         configurations {
 108                 default = \"${CONFIG}\";
 109                 ${CONFIG} {
 110                         description = \"OpenWrt\";
 111                         kernel = \"kernel@1\";
 112                         ${FDT_PROP}
 113                 };
 114         };
 115 };"
 116
 117 # Write .its file to disk
 118 echo "$DATA" > "${OUTPUT}"