Welp, guess I am not replacing my proprietary SAT>IP server, just yet... xD
https://github.com/starfive-tech/linux/issues/134
This took wwwwwwwaaaaaaaaaayyyyyyyyyyyyyyy too long, and I honestly doubt that I am going to see any answer to this post. So, tomorrow - or some time - I will learn how to compile their kernel and tools, allowing me to just... make my own image. x.x
That said, at least I can just read the u-boot docs for information. ^-^