u-boot-rockchip 2021.01+dfsg-4ubuntu3 (arm64 binary) in ubuntu impish

 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
 pinebook-pro-rk3399
 puma-rk3399
 rock-pi-4-rk3399
 rock64-rk3328
 rockpro64-rk3399