dtb_parser 0.2.3

no std but alloc depended device tree blob parsing lib
Documentation 
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use crate::byte_utils::read_aligned_be_u32;
use crate::error::{DeviceTreeError, Result};

#[derive(Debug)]
pub(crate) struct DeviceTreeHeader {
    pub magic: u32,
    pub total_size: u32,
    pub off_dt_struct: u32,
    pub off_dt_strings: u32,
    pub off_mem_reserved: u32,
    pub version: u32,
    pub last_comp_version: u32,
    pub boot_cpu_id: u32,
    pub size_dt_strings: u32,
    pub size_dt_struct: u32,
}

impl DeviceTreeHeader {
    pub(crate) fn from_bytes(data: &[u8]) -> Result<DeviceTreeHeader> {
        if data.len() < 10 {
            Err(DeviceTreeError::NotEnoughLength)
        } else {
            Ok(Self {
                magic: read_aligned_be_u32(data, 0).unwrap(),
                total_size: read_aligned_be_u32(data, 1).unwrap(),
                off_dt_struct: read_aligned_be_u32(data, 2).unwrap(),
                off_dt_strings: read_aligned_be_u32(data, 3).unwrap(),
                off_mem_reserved: read_aligned_be_u32(data, 4).unwrap(),
                version: read_aligned_be_u32(data, 5).unwrap(),
                last_comp_version: read_aligned_be_u32(data, 6).unwrap(),
                boot_cpu_id: read_aligned_be_u32(data, 7).unwrap(),
                size_dt_strings: read_aligned_be_u32(data, 8).unwrap(),
                size_dt_struct: read_aligned_be_u32(data, 9).unwrap(),
            })
        }
    }
}