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118 lines
2.9 KiB
Bash
118 lines
2.9 KiB
Bash
#!/usr/bin/env bash
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#
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# Licensed under the terms of the GNU GPL License version 2 or later.
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#
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# Author: Peter Tyser <ptyser@xes-inc.com>
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#
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# U-Boot firmware supports the booting of images in the Flattened Image
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# Tree (FIT) format. The FIT format uses a device tree structure to
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# describe a kernel image, device tree blob, ramdisk, etc. This script
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# creates an Image Tree Source (.its file) which can be passed to the
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# 'mkimage' utility to generate an Image Tree Blob (.itb file). The .itb
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# file can then be booted by U-Boot (or other bootloaders which support
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# FIT images). See doc/uImage.FIT/howto.txt in U-Boot source code for
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# additional information on FIT images.
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#
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usage() {
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echo "Usage: `basename $0` -A arch -C comp -a addr -e entry" \
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"-v version -k kernel [-D name -d dtb] -o its_file"
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echo -e "\t-A ==> set architecture to 'arch'"
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echo -e "\t-C ==> set compression type 'comp'"
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echo -e "\t-a ==> set load address to 'addr' (hex)"
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echo -e "\t-e ==> set entry point to 'entry' (hex)"
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echo -e "\t-v ==> set kernel version to 'version'"
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echo -e "\t-k ==> include kernel image 'kernel'"
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echo -e "\t-D ==> human friendly Device Tree Blob 'name'"
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echo -e "\t-d ==> include Device Tree Blob 'dtb'"
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echo -e "\t-o ==> create output file 'its_file'"
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exit 1
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}
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while getopts ":A:a:C:D:d:e:k:o:v:" OPTION
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do
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case $OPTION in
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A ) ARCH=$OPTARG;;
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a ) LOAD_ADDR=$OPTARG;;
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C ) COMPRESS=$OPTARG;;
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D ) DEVICE=$OPTARG;;
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d ) DTB=$OPTARG;;
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e ) ENTRY_ADDR=$OPTARG;;
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k ) KERNEL=$OPTARG;;
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o ) OUTPUT=$OPTARG;;
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v ) VERSION=$OPTARG;;
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* ) echo "Invalid option passed to '$0' (options:$@)"
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usage;;
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esac
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done
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# Make sure user entered all required parameters
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if [ -z "${ARCH}" ] || [ -z "${COMPRESS}" ] || [ -z "${LOAD_ADDR}" ] || \
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[ -z "${ENTRY_ADDR}" ] || [ -z "${VERSION}" ] || [ -z "${KERNEL}" ] || \
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[ -z "${OUTPUT}" ]; then
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usage
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fi
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ARCH_UPPER=`echo $ARCH | tr '[:lower:]' '[:upper:]'`
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# Conditionally create fdt information
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if [ -n "${DTB}" ]; then
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FDT="
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fdt@1 {
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description = \"${ARCH_UPPER} OpenWrt ${DEVICE} device tree blob\";
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data = /incbin/(\"${DTB}\");
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type = \"flat_dt\";
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arch = \"${ARCH}\";
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compression = \"none\";
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hash@1 {
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algo = \"crc32\";
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};
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hash@2 {
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algo = \"sha1\";
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};
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};
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"
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fi
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# Create a default, fully populated DTS file
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DATA="/dts-v1/;
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/ {
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description = \"${ARCH_UPPER} OpenWrt FIT (Flattened Image Tree)\";
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#address-cells = <1>;
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images {
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kernel@1 {
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description = \"${ARCH_UPPER} OpenWrt Linux-${VERSION}\";
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data = /incbin/(\"${KERNEL}\");
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type = \"kernel\";
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arch = \"${ARCH}\";
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os = \"linux\";
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compression = \"${COMPRESS}\";
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load = <${LOAD_ADDR}>;
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entry = <${ENTRY_ADDR}>;
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hash@1 {
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algo = \"crc32\";
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};
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hash@2 {
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algo = \"sha1\";
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};
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};
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${FDT}
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};
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configurations {
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default = \"config@1\";
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config@1 {
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description = \"OpenWrt\";
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kernel = \"kernel@1\";
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fdt = \"fdt@1\";
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};
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};
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};"
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# Write .its file to disk
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echo "$DATA" > ${OUTPUT}
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