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|
#!/bin/sh
#
# 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() {
printf "Usage: %s -A arch -C comp -a addr -e entry" "$(basename "$0")"
printf " -v version -k kernel [-D name -n address -d dtb] -o its_file"
printf "\n\t-A ==> set architecture to 'arch'"
printf "\n\t-C ==> set compression type 'comp'"
printf "\n\t-c ==> set config name 'config'"
printf "\n\t-a ==> set load address to 'addr' (hex)"
printf "\n\t-e ==> set entry point to 'entry' (hex)"
printf "\n\t-f ==> set device tree compatible string"
printf "\n\t-i ==> include initrd Blob 'initrd'"
printf "\n\t-v ==> set kernel version to 'version'"
printf "\n\t-k ==> include kernel image 'kernel'"
printf "\n\t-D ==> human friendly Device Tree Blob 'name'"
printf "\n\t-n ==> fdt unit-address 'address'"
printf "\n\t-d ==> include Device Tree Blob 'dtb'"
printf "\n\t-r ==> include RootFS blob 'rootfs'"
printf "\n\t-H ==> specify hash algo instead of SHA1"
printf "\n\t-l ==> legacy mode character (@ etc otherwise -)"
printf "\n\t-o ==> create output file 'its_file'"
printf "\n\t-O ==> create config with dt overlay 'name:dtb'"
printf "\n\t-s ==> set FDT load address to 'addr' (hex)"
printf "\n\t\t(can be specified more than once)\n"
exit 1
}
REFERENCE_CHAR='-'
FDTNUM=1
ROOTFSNUM=1
INITRDNUM=1
HASH=sha1
LOADABLES=
DTOVERLAY=
DTADDR=
while getopts ":A:a:c:C:D:d:e:f:i:k:l:n:o:O:v:r:s:H:" OPTION
do
case $OPTION in
A ) ARCH=$OPTARG;;
a ) LOAD_ADDR=$OPTARG;;
c ) CONFIG=$OPTARG;;
C ) COMPRESS=$OPTARG;;
D ) DEVICE=$OPTARG;;
d ) DTB=$OPTARG;;
e ) ENTRY_ADDR=$OPTARG;;
f ) COMPATIBLE=$OPTARG;;
i ) INITRD=$OPTARG;;
k ) KERNEL=$OPTARG;;
l ) REFERENCE_CHAR=$OPTARG;;
n ) FDTNUM=$OPTARG;;
o ) OUTPUT=$OPTARG;;
O ) DTOVERLAY="$DTOVERLAY ${OPTARG}";;
r ) ROOTFS=$OPTARG;;
s ) FDTADDR=$OPTARG;;
H ) HASH=$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 "${OUTPUT}" ] || [ -z "${CONFIG}" ]; then
usage
fi
ARCH_UPPER=$(echo "$ARCH" | tr '[:lower:]' '[:upper:]')
if [ -n "${COMPATIBLE}" ]; then
COMPATIBLE_PROP="compatible = \"${COMPATIBLE}\";"
fi
[ "$DTOVERLAY" ] && {
dtbsize=$(wc -c "$DTB" | awk '{print $1}')
DTADDR=$(printf "0x%08x" $(($LOAD_ADDR - $dtbsize)) )
}
[ "$FDTADDR" ] && {
DTADDR="$FDTADDR"
}
# Conditionally create fdt information
if [ -n "${DTB}" ]; then
FDT_NODE="
fdt${REFERENCE_CHAR}$FDTNUM {
description = \"${ARCH_UPPER} OpenWrt ${DEVICE} device tree blob\";
${COMPATIBLE_PROP}
data = /incbin/(\"${DTB}\");
type = \"flat_dt\";
${DTADDR:+load = <${DTADDR}>;}
arch = \"${ARCH}\";
compression = \"none\";
hash@1 {
algo = \"crc32\";
};
hash@2 {
algo = \"${HASH}\";
};
};
"
FDT_PROP="fdt = \"fdt${REFERENCE_CHAR}$FDTNUM\";"
fi
if [ -n "${INITRD}" ]; then
INITRD_NODE="
initrd${REFERENCE_CHAR}$INITRDNUM {
description = \"${ARCH_UPPER} OpenWrt ${DEVICE} initrd\";
${COMPATIBLE_PROP}
data = /incbin/(\"${INITRD}\");
type = \"ramdisk\";
arch = \"${ARCH}\";
os = \"linux\";
hash@1 {
algo = \"crc32\";
};
hash@2 {
algo = \"${HASH}\";
};
};
"
INITRD_PROP="ramdisk=\"initrd${REFERENCE_CHAR}${INITRDNUM}\";"
fi
if [ -n "${ROOTFS}" ]; then
dd if="${ROOTFS}" of="${ROOTFS}.pagesync" bs=4096 conv=sync
ROOTFS_NODE="
rootfs${REFERENCE_CHAR}$ROOTFSNUM {
description = \"${ARCH_UPPER} OpenWrt ${DEVICE} rootfs\";
${COMPATIBLE_PROP}
data = /incbin/(\"${ROOTFS}.pagesync\");
type = \"filesystem\";
arch = \"${ARCH}\";
compression = \"none\";
hash@1 {
algo = \"crc32\";
};
hash@2 {
algo = \"${HASH}\";
};
};
"
LOADABLES="${LOADABLES:+$LOADABLES, }\"rootfs${REFERENCE_CHAR}${ROOTFSNUM}\""
fi
# add DT overlay blobs
FDTOVERLAY_NODE=""
OVCONFIGS=""
[ "$DTOVERLAY" ] && for overlay in $DTOVERLAY ; do
overlay_blob=${overlay##*:}
ovname=${overlay%%:*}
ovnode="fdt-$ovname"
ovsize=$(wc -c "$overlay_blob" | awk '{print $1}')
echo "$ovname ($overlay_blob) : $ovsize" >&2
DTADDR=$(printf "0x%08x" $(($DTADDR - $ovsize)))
FDTOVERLAY_NODE="$FDTOVERLAY_NODE
$ovnode {
description = \"${ARCH_UPPER} OpenWrt ${DEVICE} device tree overlay $ovname\";
${COMPATIBLE_PROP}
data = /incbin/(\"${overlay_blob}\");
type = \"flat_dt\";
arch = \"${ARCH}\";
load = <${DTADDR}>;
compression = \"none\";
hash@1 {
algo = \"crc32\";
};
hash@2 {
algo = \"${HASH}\";
};
};
"
OVCONFIGS="$OVCONFIGS
$ovname {
description = \"OpenWrt ${DEVICE} overlay $ovname\";
fdt = \"$ovnode\";
${COMPATIBLE_PROP}
};
"
done
# Create a default, fully populated DTS file
DATA="/dts-v1/;
/ {
description = \"${ARCH_UPPER} OpenWrt FIT (Flattened Image Tree)\";
#address-cells = <1>;
images {
kernel${REFERENCE_CHAR}1 {
description = \"${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 = \"$HASH\";
};
};
${INITRD_NODE}
${FDT_NODE}
${FDTOVERLAY_NODE}
${ROOTFS_NODE}
};
configurations {
default = \"${CONFIG}\";
${CONFIG} {
description = \"OpenWrt ${DEVICE}\";
kernel = \"kernel${REFERENCE_CHAR}1\";
${FDT_PROP}
${LOADABLES:+loadables = ${LOADABLES};}
${COMPATIBLE_PROP}
${INITRD_PROP}
};
${OVCONFIGS}
};
};"
# Write .its file to disk
echo "$DATA" > "${OUTPUT}"
|
