The goal is to produce a user-friendly distribution of U-Boot, where there is as few differences in features possible between boards, and a "familiar" user interface for an early boot process tool.

The documentation found in the doc/ directory is also rendered at the Tow-Boot website

Unless stated otherwise with a SPDX header, the Nix expressions are under the license declared in COPYING, the MIT License. This applies only to the packaging infrastructure.

U-Boot derived code is licensed the same as U-Boot, which is GPL-2.0+. All patches are owned by their authors under the same license.

At the risk of repetition the produced binaries are GPL-2.0+, since U-Boot itself is.