target/linux/mpc83xx/files/scripts/mkits.sh

   1 #!/bin/bash
   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         echo "Usage: `basename $0` -A arch -C comp -a addr -e entry" \
  19                 "-v version -k kernel [-d dtb] -o its_file"
  20         echo -e "\t-A ==> set architecture to 'arch'"
  21         echo -e "\t-C ==> set compression type 'comp'"
  22         echo -e "\t-a ==> set load address to 'addr' (hex)"
  23         echo -e "\t-e ==> set entry point to 'entry' (hex)"
  24         echo -e "\t-v ==> set kernel version to 'version'"
  25         echo -e "\t-k ==> include kernel image 'kernel'"
  26         echo -e "\t-d ==> include Device Tree Blob 'dtb'"
  27         echo -e "\t-o ==> create output file 'its_file'"
  28         exit 1
  29 }
  30
  31 while getopts ":A:C:a:d:e:k:o:v:" OPTION
  32 do
  33         case $OPTION in
  34                 A ) ARCH=$OPTARG;;
  35                 C ) COMPRESS=$OPTARG;;
  36                 a ) LOAD_ADDR=$OPTARG;;
  37                 d ) DTB=$OPTARG;;
  38                 e ) ENTRY_ADDR=$OPTARG;;
  39                 k ) KERNEL=$OPTARG;;
  40                 o ) OUTPUT=$OPTARG;;
  41                 v ) VERSION=$OPTARG;;
  42                 * ) echo "Invalid option passed to '$0' (options:$@)"
  43                 usage;;
  44         esac
  45 done
  46
  47 # Make sure user entered all required parameters
  48 if [ -z "${ARCH}" ] || [ -z "${COMPRESS}" ] || [ -z "${LOAD_ADDR}" ] || \
  49         [ -z "${ENTRY_ADDR}" ] || [ -z "${VERSION}" ] || [ -z "${KERNEL}" ] || \
  50         [ -z "${OUTPUT}" ]; then
  51         usage
  52 fi
  53
  54 # Create a default, fully populated DTS file
  55 DATA="/dts-v1/;
  56
  57 / {
  58         description = \"Linux kernel ${VERSION}\";
  59         #address-cells = <1>;
  60
  61         images {
  62                 kernel@1 {
  63                         description = \"Linux Kernel ${VERSION}\";
  64                         data = /incbin/(\"${KERNEL}\");
  65                         type = \"kernel\";
  66                         arch = \"${ARCH}\";
  67                         os = \"linux\";
  68                         compression = \"${COMPRESS}\";
  69                         load = <${LOAD_ADDR}>;
  70                         entry = <${ENTRY_ADDR}>;
  71                         hash@1 {
  72                                 algo = \"crc32\";
  73                         };
  74                         hash@2 {
  75                                 algo = \"sha1\";
  76                         };
  77                 };
  78
  79                 fdt@1 { /* start fdt */
  80                         description = \"Flattened Device Tree blob\";
  81                         data = /incbin/(\"${DTB}\");
  82                         type = \"flat_dt\";
  83                         arch = \"${ARCH}\";
  84                         compression = \"none\";
  85                         hash@1 {
  86                                 algo = \"crc32\";
  87                         };
  88                         hash@2 {
  89                                 algo = \"sha1\";
  90                         };
  91                 }; /* end fdt */
  92         };
  93
  94         configurations {
  95                 default = \"config@1\";
  96                 config@1 {
  97                         description = \"Default Linux kernel\";
  98                         kernel = \"kernel@1\";
  99                         fdt = \"fdt@1\";
 100                 };
 101         };
 102 };"
 103
 104 # Conditionally strip fdt information out of tree
 105 if [ -z "${DTB}" ]; then
 106         DATA=`echo "$DATA" | sed '/start fdt/,/end fdt/d'`
 107         DATA=`echo "$DATA" | sed '/fdt/d'`
 108 fi
 109
 110 # Write .its file to disk
 111 echo "$DATA" > ${OUTPUT}