#!/bin/sh
# Download and build latest version of ARM Trusted Firmware

PLAT="${1}" # For example "sun50i_a64"
TUPLE="${2}" # For example "aarch64-linux-gnu"

TARBALL="${ATF_TARBALL}"
GIT_REV="${ATF_GIT_REV}"
GIT_URL="${ATF_GIT_URL:-https://github.com/ARM-software/arm-trusted-firmware.git}"

set -e

if [ ! -s "${TARBALL}" ]
then
	if [ -z "${GIT_REV}" ]
	then
		# ATF version to build
		GIT_REV=$(git ls-remote --tags \
		                        --refs \
		                        "${GIT_URL}" \
		                        "v*" | \
		          cut -f 2 | \
		          grep -Eo "v[0-9]+\.[0-9]+$" | \
		          tail -n 1)
	fi

	# Download ATF
	git clone --branch "${GIT_REV}" \
	          --depth 1 \
	          "${GIT_URL}" arm-trusted-firmware
else
	# Extract ATF
	tar -xf "${TARBALL}"

	mv arm-trusted-firmware-* arm-trusted-firmware
fi

# Step into ATF directory
cd arm-trusted-firmware

# CROSS_COMPILE must point to a valid compiler path prefix
export CROSS_COMPILE=$(dirname $(which "${TUPLE}-gcc"))/"${TUPLE}-"

# Build ATF
make PLAT="${PLAT}" DEBUG=1 bl31