u-boot-rockchip 2018.07~rc3+dfsg1-0ubuntu3 (arm64 binary) in ubuntu disco

 Das U-Boot is a cross-platform bootloader for embedded systems,
 used as the default boot loader by several board vendors. It is
 intended to be easy to port and to debug, and runs on many
 supported architectures, including PPC, ARM, MIPS, x86, m68k,
 NIOS, and Microblaze.
 .
 This package includes boot loaders for various Rockchip platforms.
 .
 Included platforms:
 firefly-rk3399
 puma-rk3399