#!/bin/bash
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#
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# Copyright (c) 2021 Rockchip Electronics Co., Ltd
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#
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# SPDX-License-Identifier: GPL-2.0
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#
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set -e
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function usage()
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{
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echo
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echo "usage:"
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echo " $0 -f [Android boot.img] -o [Distro(ext2) boot.img]"
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echo
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}
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function args_process()
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{
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if [ $# -ne 4 ]; then
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usage
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exit 1
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fi
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while [ $# -gt 0 ]; do
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case $1 in
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-f)
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BOOT_IMG=$2
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shift 2
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;;
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-o)
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DISTRO_IMG=$2
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shift 2
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;;
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*)
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usage
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exit 1
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;;
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esac
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done
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if [ ! -f ${BOOT_IMG} ]; then
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echo "ERROR: No ${ITB}"
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exit 1
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fi
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}
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function android2distro()
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{
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rm distro/ boot/ ${DISTRO_IMG} -rf
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mkdir -p boot
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./scripts/unpack_bootimg --boot_img ${BOOT_IMG} --out distro/
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./scripts/unpack_resource.sh distro/second distro/
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BOOTARGS=`fdtget -ts distro/rk-kernel.dtb /chosen bootargs`
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cp distro/rk-kernel.dtb boot/rk-kernel.dtb
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cp distro/kernel boot/kernel
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cp distro/ramdisk boot/ramdisk
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mkdir -p boot/extlinux
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touch boot/extlinux/extlinux.conf
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echo "label rockchip-linux-kernel" >> boot/extlinux/extlinux.conf
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echo " kernel /kernel" >> boot/extlinux/extlinux.conf
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echo " fdt /rk-kernel.dtb" >> boot/extlinux/extlinux.conf
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echo " initrd /ramdisk" >> boot/extlinux/extlinux.conf
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echo " append ${BOOTARGS}" >> boot/extlinux/extlinux.conf
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SIZE_KB=`ls -lh ${BOOT_IMG} | awk '{ print $5 }' | tr -d 'M'`
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SIZE_KB=`echo "scale=0;$SIZE_KB/1"|bc -l` # for align down integer
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SIZE_KB=`expr ${SIZE_KB} + 2 + 1`
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SIZE_BYTE=$((${SIZE_KB}*1024))
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genext2fs -b ${SIZE_BYTE} -B 1024 -d boot/ -i 8192 -U ${DISTRO_IMG}
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echo
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echo "Successful: ${DISTRO_IMG} is ready."
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echo
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}
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args_process $*
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android2distro
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