> <@bread_crumb:halogen.city> I would like to ask, since U-Boot boots GRUB which then loads the kernel + initramfs, if booting from a USB to replicate the former I would have to:
> 
> - Make a UEFI bootable USB with the Asahi kernel image ( the intention is to use asahi ).
> - Boot USB from U-Boot?
> 
> I suppose image to be used for this are either asahi-base or asahi-desktop from https://github.com/AsahiLinux/asahi-alarm-builder/blob/main/build.sh.
> Initramfs should be part of the kernel image, right?

Alright so I got further with this, I managed to build the reference images from the repository and am now looking to properly format a USB and finally boot this thing from U-Boot. Now, the reference script (https://github.com/AsahiLinux/asahi-alarm-builder/blob/main/build.sh) builds .img files and not .iso, I tried basically vfat formatting it and copying the img onto /dev/sda, that didn't work, and gpt vfat formatting and copying file contents onto fs, but that also didn't work. U-Boot throws an error that it can't read "/".

Does anyone know the proper process setting up a USB for booting from U-Boot with the .img files + esp directory?