1 files changed, 117 insertions, 0 deletions
diff --git a/scripts/mkits.sh b/scripts/mkits.sh
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+++ b/scripts/mkits.sh
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+#!/bin/bash
+#
+# Licensed under the terms of the GNU GPL License version 2 or later.
+#
+# Author: Peter Tyser <ptyser@xes-inc.com>
+#
+# U-Boot firmware supports the booting of images in the Flattened Image
+# Tree (FIT) format.  The FIT format uses a device tree structure to
+# describe a kernel image, device tree blob, ramdisk, etc.  This script
+# creates an Image Tree Source (.its file) which can be passed to the
+# 'mkimage' utility to generate an Image Tree Blob (.itb file).  The .itb
+# file can then be booted by U-Boot (or other bootloaders which support
+# FIT images).  See doc/uImage.FIT/howto.txt in U-Boot source code for
+# additional information on FIT images.
+#
+
+usage() {
+	echo "Usage: `basename $0` -A arch -C comp -a addr -e entry" \
+		"-v version -k kernel [-D name -d dtb] -o its_file"
+	echo -e "\t-A ==> set architecture to 'arch'"
+	echo -e "\t-C ==> set compression type 'comp'"
+	echo -e "\t-a ==> set load address to 'addr' (hex)"
+	echo -e "\t-e ==> set entry point to 'entry' (hex)"
+	echo -e "\t-v ==> set kernel version to 'version'"
+	echo -e "\t-k ==> include kernel image 'kernel'"
+	echo -e "\t-D ==> human friendly Device Tree Blob 'name'"
+	echo -e "\t-d ==> include Device Tree Blob 'dtb'"
+	echo -e "\t-o ==> create output file 'its_file'"
+	exit 1
+}
+
+while getopts ":A:a:C:D:d:e:k:o:v:" OPTION
+do
+	case $OPTION in
+		A ) ARCH=$OPTARG;;
+		a ) LOAD_ADDR=$OPTARG;;
+		C ) COMPRESS=$OPTARG;;
+		D ) DEVICE=$OPTARG;;
+		d ) DTB=$OPTARG;;
+		e ) ENTRY_ADDR=$OPTARG;;
+		k ) KERNEL=$OPTARG;;
+		o ) OUTPUT=$OPTARG;;
+		v ) VERSION=$OPTARG;;
+		* ) echo "Invalid option passed to '$0' (options:$@)"
+		usage;;
+	esac
+done
+
+# Make sure user entered all required parameters
+if [ -z "${ARCH}" ] || [ -z "${COMPRESS}" ] || [ -z "${LOAD_ADDR}" ] || \
+	[ -z "${ENTRY_ADDR}" ] || [ -z "${VERSION}" ] || [ -z "${KERNEL}" ] || \
+	[ -z "${OUTPUT}" ]; then
+	usage
+fi
+
+ARCH_UPPER=`echo $ARCH | tr '[:lower:]' '[:upper:]'`
+
+# Conditionally create fdt information
+if [ -n "${DTB}" ]; then
+	FDT="
+		fdt@1 {
+			description = \"${ARCH_UPPER} OpenWrt ${DEVICE} device tree blob\";
+			data = /incbin/(\"${DTB}\");
+			type = \"flat_dt\";
+			arch = \"${ARCH}\";
+			compression = \"none\";
+			hash@1 {
+				algo = \"crc32\";
+			};
+			hash@2 {
+				algo = \"sha1\";
+			};
+		};
+"
+fi
+
+# Create a default, fully populated DTS file
+DATA="/dts-v1/;
+
+/ {
+	description = \"${ARCH_UPPER} OpenWrt FIT (Flattened Image Tree)\";
+	#address-cells = <1>;
+
+	images {
+		kernel@1 {
+			description = \"${ARCH_UPPER} OpenWrt Linux-${VERSION}\";
+			data = /incbin/(\"${KERNEL}\");
+			type = \"kernel\";
+			arch = \"${ARCH}\";
+			os = \"linux\";
+			compression = \"${COMPRESS}\";
+			load = <${LOAD_ADDR}>;
+			entry = <${ENTRY_ADDR}>;
+			hash@1 {
+				algo = \"crc32\";
+			};
+			hash@2 {
+				algo = \"sha1\";
+			};
+		};
+
+${FDT}
+
+	};
+
+	configurations {
+		default = \"config@1\";
+		config@1 {
+			description = \"OpenWrt\";
+			kernel = \"kernel@1\";
+			fdt = \"fdt@1\";
+		};
+	};
+};"
+
+# Write .its file to disk
+echo "$DATA" > ${OUTPUT}