FCOSDISK=/dev/sda
 STREAM=stable # or `next` or `testing`
 echo $FCOSDISK
 echo $STREAM
 sudo podman run --pull=always --privileged --rm \
 -v /dev:/dev -v /run/udev:/run/udev -v .:/data -w /data \
 quay.io/coreos/coreos-installer:release \
 install -a aarch64 -s $STREAM -i config.ign $FCOSDISK 

We pass in --append-karg nomodeset here to workaround an issue where monitor output will be lost during system boot

1. U-Boot
   You need to be able to run Fedora Tools, so you may want to run the toolbox, which is not available for Pi OS.
   To run Fedora Tools, you install distrobox
   It only pulls the Fedora-minimal image of around 50 MB, see fedora/fedora-minimal · Quay

   Code: Select all

   sudo apt install distrobox
   distrobox-create --name my-container --image fedora:41
   distrobox-enter my-container
   sudo dnf install cpio
   sudo dnf install rsync
   

   Inside the container, you run the commands as given in Installing FCOS and Booting via U-Boot.
   Download the binaries

   Code: Select all

   RELEASE=41 # The target Fedora Release. Use the same one that current FCOS is based on.
   mkdir -p /tmp/RPi4boot/boot/efi/
   dnf download --resolve --releasever=$RELEASE --forcearch=aarch64 --destdir=/tmp/RPi4boot/ uboot-images-armv8 bcm283x-firmware bcm283x-overlays
   for rpm in /tmp/RPi4boot/*rpm; do rpm2cpio $rpm | sudo cpio -idv -D /tmp/RPi4boot/; done
   sudo mv /tmp/RPi4boot/usr/share/uboot/rpi_arm64/u-boot.bin /tmp/RPi4boot/boot/efi/rpi-u-boot.bin
   exit
   

   put them in the disk outside the container.
   I adapted the command slightly to avoid the error chown operation errors:

   Code: Select all

   rsync: [receiver] chown "/tmp/FCOSEFIpart/..." failed: Operation not permitted (1)

   .
   I followed the advice given in "rsync: failed to set permissions on ..." error with rsync -a or -p option - Unix & Linux Stack Exchange.
   That error could be due to running things in a container and locally on the host.

   Code: Select all

   FCOSDISK=/dev/sda
   FCOSEFIPARTITION=$(lsblk $FCOSDISK -J -oLABEL,PATH | jq -r '.blockdevices[] | select(.label == "EFI-SYSTEM").path')
   mkdir /tmp/FCOSEFIpart
   sudo mount $FCOSEFIPARTITION /tmp/FCOSEFIpart
   sudo rsync -avh --no-o --no-g --ignore-existing /tmp/RPi4boot/boot/efi/ /tmp/FCOSEFIpart/
   sudo umount $FCOSEFIPARTITION
   

2. EDK2

   Code: Select all

    FCOSEFIPARTITION=$(lsblk $FCOSDISK -J -oLABEL,PATH | jq -r '.blockdevices[] | select(.label == "EFI-SYSTEM")'.path)
    mkdir /tmp/FCOSEFIpart
    sudo mount $FCOSEFIPARTITION /tmp/FCOSEFIpart
    pushd /tmp/FCOSEFIpart
    VERSION=v1.38 # use latest one from https://github.com/pftf/RPi4/releases
    sudo curl -LO https://github.com/pftf/RPi4/releases/download/${VERSION}/RPi4_UEFI_Firmware_${VERSION}.zip
    sudo unzip RPi4_UEFI_Firmware_${VERSION}.zip
    sudo rm RPi4_UEFI_Firmware_${VERSION}.zip
    popd
    sudo umount /tmp/FCOSEFIpart