Commit ee287587 authored by H. Peter Anvin's avatar H. Peter Anvin

bzip2/lzma: update boot protocol specification

Impact: documentation

Update the boot protocol specification to include the currently
supported file formats and their magic numbers.
Signed-off-by: default avatarH. Peter Anvin <>
parent 95c4bff0
......@@ -542,7 +542,10 @@ Protocol: 2.08+
The payload may be compressed. The format of both the compressed and
uncompressed data should be determined using the standard magic
numbers. Currently only gzip compressed ELF is used.
numbers. The currently supported compression formats are gzip
(magic numbers 1F 8B or 1F 9E), bzip2 (magic number 42 5A) and LZMA
(magic number 5D 00). The uncompressed payload is currently always ELF
(magic number 7F 45 4C 46).
Field name: payload_length
Type: read
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