"zsbl" means "Zero Stage Bootloader" and is the very, very first piece of the puzzle to boot the Milk-V Pioneer - which I now own.
user@BIGBOI:/opt/zsbl$ du -h zsbl.*
132K zsbl.bin
944K zsbl.dis
772K zsbl.elf
240K zsbl.map
It feels stupidly weird to just... compile your bootloader. This is literally the first thing that gets invoked after the CPU; it is what bootstraps the initial hardware and eventually goes to EDK2 / u-boot. o.o
This is probably as close to an IPL as Ill ever get. xD