https://github.com/rockchip-toybrick rk3399源码下载地址
编译前设置环境变量即可:export CROSS_COMPILE=” aarch64-linux-gnu-”
http://t.rock-chips.com/wiki.php?mod=view&id=42 u-boot编译
http://t.rock-chips.com/wiki.php?mod=view&id=26 内核编译