To install Hisilicon SDK toolchain in Ubuntu 18.04 install the following packages:
Download the SDK from:
sudo apt-get install libc6:i386 libncurses5:i386 libstdc++6:i386
sudo apt-get install multiarch-support
sudo dpkg --add-architecture i386
sudo apt-get install zlib1g:i386
Add to your .bashrc profile the following line:
PATH=${PATH}:/opt/hisi-linux/x86-arm/arm-hisiv300-linux/target/bin/
There is another link to download the SDK:
hisi-linux.tar.bz2