Installing and running grub on rock64 (rk3328) arm64

grub_arm64_debian.md

Starting with Rock64, u-boot installed to SPI flash, Debian stretch installed to eMMC or micro SD card.

Setup /boot

Add things like dtb and any images you want to eventually load with grub

install grub

From Debian:

sudo apt-get -y install grub2-common efivar grub-efi-arm64
sudo grub-install /dev/mmcblk1p6 --target arm64-efi

Should now have /boot/efi/debian/grubaa64.efi

grub boot

• interrupt autoboot, drop into uboot command line

load ${devtype} ${devnum}:${distro_bootpart} ${kernel_addr_r} efi/debian/grubaa64.efi
load ${devtype} ${devnum}:${distro_bootpart} ${fdt_addr_r} dtb
bootefi ${kernel_addr_r} ${fdt_addr_r}