hermit-dtb

Crate to parse Flattened Device Trees (FDT)/Device Tree Blobs (DTB) in a no_std environment. Performs no dynamic memory allocations and can therefore be universally used for operating system development. Originally written by Colin Finck (colin.finck@rwth-aachen.de) for the AArch64 port of HermitCore-rs, hence the name.

Features

• Enumerating subnodes of a given path.
• Enumerating properties of a given path.
• Getting the data of a specific property.
• Finding incomplete paths (e.g. looking for /uart@ reliably yields /uart@fe001000 if that is the only UART device).
• Written in mostly safe Rust. unsafe is only used when accessing the in-memory DTB in the first place (unavoidable).
• parse_dtb example tool to demonstrate the features.

ToDo

• Implement an iterator for the memory reservation block.
• Implement a method to fetch the boot_cpuid_phys value.

References

• Devicetree Specification 0.2

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.