#!/bin/bash

source ./envsetup

#set -v

usage() {
        echo "Usage:"
        echo "  [CONFIG=<config>] ./build_linux.sh [-h] [-d] [-c | -a | -m]"
        echo "  -h: display usage"
        echo "  -d: enable debug"
        echo "  -c: checkdtb"
        echo "  -a: make distclean"
	echo "  -m: make menuconfig"
}

while getopts ":hdcam" opt
do
        case $opt in
        h)
                O_HELP=y
                ;;
        d)
                O_DEBUG=y
                ;;
        c)
                O_CHKDTB=y
                ;;
        a)
                O_MAKE_ALL=y
                ;;
	m)
		O_MAKE_MENUCFG=y
		;;
        ?)
                echo "there is unrecognized parameter."
                usage
                exit 1
                ;;
    esac
done

#echo "O_HELP = $O_HELP"
#echo "O_DEBUG = $O_DEBUG"
#echo "O_CHKDTB = $O_CHKDTB"
#echo "O_MAKE_ALL = $O_MAKE_ALL"
#echo "O_MAKE_MENUCFG = $O_MAKE_MENUCFG"

if [ "$O_HELP" = "y" ]; then
	usage
	exit 0
fi

# default config
if [[ -z "${CONFIG}" ]]; then
        CONFIG=defconfig
fi

if [[ ${CONFIG} = "defconfig" ]]; then
	OUT=$WS_LINUX/out-linux
elif [[ ${CONFIG} = "defconfig 32-bit.config" ]]; then
        OUT=$WS_LINUX/out-linux32
elif [[ ${CONFIG} = "sophgo_mango_normal_defconfig" ]]; then
	OUT=$WS_LINUX/out-linuxboot
elif [[ ${CONFIG} = "sophgo_mango_ubuntu_defconfig" ]]; then
	OUT=$WS_LINUX/out-ubuntu
fi

if [ "$O_DEBUG" = "y" ]; then
	OUT=$OUT-debug
fi

export OUT

echo "======> CONFIG=$CONFIG"
echo "======> OUT=$OUT"

export ARCH=riscv
echo "======> ARCH=$ARCH"

#export CROSS_COMPILE=riscv64-linux-
export CROSS_COMPILE=riscv64-buildroot-linux-gnu-
#export CROSS_COMPILE=riscv64-unknown-linux-gnu-
echo "======> CROSS_COMPILE=$CROSS_COMPILE"

#exit

# FIXME: just to make code simple
# "-c" only take effective when CONFIG=defconfig, don't use it for other CONFIGs
if [ "$O_CHKDTB" == "y" ] && [ "$CONFIG" == "defconfig" ]; then
	echo "======> Start checking dtb ......"

	pushd $PATH_LINUX

	rm -f $OUT/arch/riscv/boot/dts/sophgo/sg2042-milkv-pioneer.dtb
	make -j$(nproc) O=$OUT CHECK_DTBS=y W=1 sophgo/sg2042-milkv-pioneer.dtb

	popd

	exit
fi

if [ "$O_MAKE_MENUCFG" = "y" ]; then
	echo "======> Start making menuconfig ......"
	pushd $PATH_LINUX
	make O=$OUT menuconfig
	popd
	exit
fi

echo "======> Start building ......"

pushd $PATH_LINUX

if [ "$O_MAKE_ALL" = "y" ]; then
	echo "======> Cleanup for FULLY building ......"
	rm -rf $OUT
	mkdir $OUT
	make O=$OUT $CONFIG

#	./scripts/config --file $OUT/.config -e DYNAMIC_DEBUG

	# enable kernel debug, so we can get more info when dump_stack
	# default comment out to make image size small, enable it when requierd
<< COMMENT
	./scripts/config --file $OUT/.config -e CONFIG_DEBUG_INFO
	./scripts/config --file $OUT/.config -d CONFIG_DEBUG_INFO_NONE
	./scripts/config --file $OUT/.config -e CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
	./scripts/config --file $OUT/.config -d CONFIG_DEBUG_INFO_REDUCED
	./scripts/config --file $OUT/.config -e CONFIG_DEBUG_INFO_COMPRESSED_NONE
	./scripts/config --file $OUT/.config -d CONFIG_DEBUG_INFO_COMPRESSED_ZLIB
	./scripts/config --file $OUT/.config -d CONFIG_DEBUG_INFO_SPLIT
	./scripts/config --file $OUT/.config -d CONFIG_DEBUG_INFO_BTF
	./scripts/config --file $OUT/.config -e CONFIG_PAHOLE_HAS_SPLIT_BTF
	./scripts/config --file $OUT/.config -e CONFIG_PAHOLE_HAS_LANG_EXCLUDE
	./scripts/config --file $OUT/.config -d CONFIG_GDB_SCRIPTS
COMMENT
	# for sdmmc
	# MMC_SDHCI_OF_DWCMSHC already in defconfig
	# NLS_ISO8859_1 is enabled as module in defconfig, enabled as built-in
        ./scripts/config --file $OUT/.config -e NLS_ISO8859_1

        # for gpio
        ./scripts/config --file $OUT/.config -e CONFIG_GPIO_DWAPB

        # for poweroff/reboot by command
        ./scripts/config --file $OUT/.config -e CONFIG_SENSORS_SG2042_MCU

	if [ "$O_DEBUG" = "y" ]; then
		echo "======> Adding DEBUG info ......"
		./scripts/config --file $OUT/.config \
			-d CONFIG_COMPILE_TEST \
			-e CONFIG_DEBUG_KERNEL \
			-e CONFIG_DEBUG_INFO \
			-d CONFIG_DEBUG_INFO_NONE \
			-e CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT \
			-d CONFIG_DEBUG_INFO_REDUCED \
			-e CONFIG_DEBUG_INFO_COMPRESSED_NONE \
			-d CONFIG_DEBUG_INFO_COMPRESSED_ZLIB \
			-d CONFIG_DEBUG_INFO_SPLIT \
			-d CONFIG_DEBUG_INFO_BTF \
			-d CONFIG_GDB_SCRIPTS
	fi
fi

make -j$(nproc) O=$OUT W=1 

if [[ ${CONFIG} = "sophgo_mango_ubuntu_defconfig" ]]; then
        rm -rf $WS_LINUX/linux-*.deb
        rm -rf $WS_LINUX/linux-*.changes
        rm -rf $WS_LINUX/linux-*.buildinfo

	make -j$(nproc) O=$OUT bindeb-pkg
fi

popd