genboot.py generates a U-Boot script that boots Xen in dom0-less mode based on a simple YAML configuration. Point it at the YAML and an output directory, and it will assemble the fatload commands and domain configuration you need.

• Python 3.8 or newer
• pyyaml installed (pip install pyyaml)

python genboot.py example.yaml ./out
# or read the YAML from stdin
python genboot.py ./out < example.yaml

Each command reads the YAML configuration, resolves files from the output directory, and emits the U-Boot script to standard output. Ensure the output directory already contains the artifacts referenced by the configuration (e.g. Xen binary, device trees, kernels, ramdisks), then capture the generated script to a file or pipe it directly into your U-Boot tooling.

Inspect example.yaml for a minimal setup. The file describes media, Xen binary, device tree, and domU domains. Addresses accept both hex (e.g. 0x4000000) and size suffixes (512MiB).

Key fields in example.yaml:

• media: physical boot device target (type/number) for all fatload commands.
• dt: device tree blob to load and its target address.
• xen: Xen binary path, boot arguments, load address, and optional dom0-less extras such as colors (first value applies to Xen, additional values to other domains; use none as the first value to skip Xen coloring) and bootonly (limit generated boot commands to selected domains instead of all).
• domains: per-domain entries with memory/CPU params plus kernel/device tree artifacts and load addresses. Each domain may also provide a ramdisk (file/address) that is exposed as a multiboot,ramdisk module.

To run tests, run:

pytest