coreos/documentation/boot/bootflow-uboot.dot

digraph G {
    rom [label = "CPU Rom Code";shape = rect;];
    
    uboot [label = "u-boot with EFI/EBBR support";shape = rect;];
    
    kernel [label = "UKI (EFI Stub + Kernel + DTS + Initramfs";shape = rect;];
    
    rom -> uboot -> kernel;
}