CX9240 - The binaries referenced by the CI are not available.

[elvexys-md]

Dear Beckhoff team,

We are unable to compile the bootloader for the CX9240 because the referenced binaries are not available.

The .ci/build-zynqmp.sh file references URLs that are likely internal to Beckhoff (https://git.beckhoff.dev/).

Could you please provide these binaries?

Thank you,
Michel Demierre

[sdirkwinkel]

@elvexys-md Sorry for taking so long on this, I didn't have notifications enabled here and then took a while to get to this after someone told me about it.

It's still wip, but there's a branch here for testing:
https://github.com/Beckhoff/u-boot/tree/std/binaries

the bl31 and zynqmp pmu firmware are just build from upstream, we don't really change anything in there.

You should be able to build u-boot with
.ci/build-zynqmp.sh build cx9240

u-boot then needs to be on the first mbr fat partition on the sdcard with these files (xilinx bootloader looks for boot.bin on root of that fs):
https://github.com/Beckhoff/u-boot/blob/std/binaries/debian/firmware-cx9240.postinst

we currently use "debian-install" tooling inside our Beckhoff RT linux to create images but don't have support for building other OS images yet. Here's an old test script I had lying around, maybe that's helpful still:

#!/bin/sh

cleanup() {
	if mountpoint -q "${mount_dir}"; then
		umount -R "$mount_dir"
	fi
	
	if losetup -a | grep -q "${loopdev}"; then
		losetup -d "${loopdev}"
	fi
	
	if test -d "${mount_dir}"; then
		rm -r "${mount_dir}"
	fi
}

create_image() {
	image_file="debian.img"
	mount_dir="$(mktemp -d)"

	fallocate -l 2G "${image_file}"

	# Partition 1: EFI System Partition (type 'ef'), 50MB
	# Partition 2: Linux filesystem (type '83'), utilizing the rest of the space
	printf "size=50M, type=ef\n type=83\n" | sfdisk --label=dos "${image_file}"

	loopdev="$(losetup --partscan --find --show ${image_file})"
	part1="${loopdev}p1"
	part2="${loopdev}p2"
	
	mkfs.vfat "${part1}"
	mkfs.ext4 "${part2}"
	
	mount "${part2}" "${mount_dir}"
	
	mmdebstrap --architectures=arm64 --variant=debootstrap bookworm "${mount_dir}"
	
	mkdir -p "${mount_dir}/boot/efi"
	mount "${part1}" "${mount_dir}/boot/efi"
	cp boot.bin u-boot.itb "${mount_dir}/boot/efi"

	mount -o bind /dev "${mount_dir}/dev"
	mount -o bind /proc "${mount_dir}/proc"
	mount -o bind /sys "${mount_dir}/sys"

	cat > "${mount_dir}/etc/systemd/network/20-wired.network" <<-EOF
		[Match]
		Name=en*
		
		[Network]
		DHCP=ipv4
	EOF

	cat > "${mount_dir}/etc/hosts" <<-EOF
		127.0.0.1 localhost cx8200
	EOF

	chroot "${mount_dir}" /bin/bash -eu <<-EOF
		printf "cx8200\n" > /etc/hostname
		apt-get update && apt-get install -y \
			grub-efi-arm64 \
			linux-image-arm64 \
			openssh-server \
			sudo \
			systemd-timesyncd \
		;
		systemctl enable systemd-networkd

		useradd --shell /bin/bash --create-home --groups sudo --user-group debian
		echo debian:password | chpasswd

		printf '/dev/mmcblk0p2 / ext4 errors=remount-ro 0 1' > /etc/fstab
		update-initramfs -u
		grub-install --removable --no-nvram --target=arm64-efi --efi-directory=/boot/efi --bootloader-id=GRUB
		update-grub
	EOF

	umount -R "${mount_dir}"
	losetup -d "${loopdev}"
}

set -e
set -u

trap cleanup EXIT

create_image