piotr.krol@3mdeb.com board support package
boot rom also needed
boot rom for the embedded mgmt processor (m68k?) probably uboot-spl running litex migen soc on ECP5 write gpio spi sdmmc uart drivers load first stage uboot spl from SPI and SDMMC in SPI mode run 2nd stage (full uboot) load initramfs and kernel from sd or QSPI (drivers TBD too) run some linux busybox.
openocd support needed for ppc64
also pete batard, GPT / EFI boot advice to standardise OS startup