You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: lib.rs
    path of file: ./repos/oreboot/src/lib/compression/src
    
    the code of the file until where you have to start completion: #![no_std]

use core::{ptr::read_volatile, slice};
use log::println;

// offset_bits aka EI, usually 10..13
// length_bits aka EJ, usually 4..5
// buf_fill_byte (often 0x20, space) - we use 0x00, the zero byte
// decompress_buf_size, always 1 << EI
// compress_buf_size, always 2 << EI
const EI: usize = 12;
const DECOMP_BUF_SIZE: usize = 1 << EI;
const COMP_BUF_SIZE: usize = 2 << EI;
pub type OreLzss = lzss::Lzss<EI, 4, 0x00, DECOMP_BUF_SIZE, COMP_BUF_SIZE>;

/// # Safety
///
/// The caller needs to ensure correctness of source and target addresses.
/// The first four bytes at source address must hold the compressed size.
/// The payload size is the maximum expected size after decompression.
/// Ensure that it fits, i.e., `payload_size` bytes after target address
/// are unused. We allocate a buffer of that size; exceeding it will error.
pub unsafe fn decompress(sou
    
pub unsafe fn decompress(source_addr: usize, target_addr: usize, payload_size: usize) {
    // NOTE: This must be u32 because it is 4 bytes, so cast later.
    let compressed_size = unsafe { read_volatile(source_addr as *const u32) };
    let in_ptr = (source_addr + 4) as *const u8;
    let out_ptr = target_addr as *mut u8;
    let input = unsafe { slice::from_raw_parts(in_ptr, compressed_size as usize) };
    let output = unsafe { slice::from_raw_parts_mut(out_ptr, payload_size) };

    println!(
        "Decompress {compressed_size} bytes from {input:p} to {output:p}, reserved {payload_size} bytes",
    );

    let reader = lzss::SliceReader::new(input);
    let writer = lzss::SliceWriter::new(output);
    match OreLzss::decompress_stack(reader, writer) {
        Ok(r) => {
            println!("Success, decompressed {r} bytes :)");
        }
        Err(e) => {
            panic!("Decompression error {e}");
        }
    }
}