How to Add Unzip Function to U-boot

Open the U-boot config source code

For ZYNQ, it's u-boot-xlnx/include/configs/zynq_zc70x.h

Append #define CONFIG_CMD_UNZIP to the file before #endif

The full list of u-boot commands can be found at u-boot-xlnx/include/config_cmd_all.h

Clean and recompile u-boot

make distclean
make zynq_zc70x