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| author | H. Peter Anvin <hpa@linux.intel.com> | 2009-01-14 16:07:38 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2009-01-14 16:07:38 -0800 |
| commit | ee287587dafd77fd211e50637561224605c214b4 (patch) | |
| tree | 13ec1307649f0efb0d0de035782041edfe5a2ce1 /Documentation/x86/boot.txt | |
| parent | 95c4bff0308eb0819436b730a836846d3e784657 (diff) | |
| download | lwn-ee287587dafd77fd211e50637561224605c214b4.tar.gz lwn-ee287587dafd77fd211e50637561224605c214b4.zip | |
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: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'Documentation/x86/boot.txt')
| -rw-r--r-- | Documentation/x86/boot.txt | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/x86/boot.txt b/Documentation/x86/boot.txt index fcdc62b3c3d8..9ac70ffe2b77 100644 --- a/Documentation/x86/boot.txt +++ b/Documentation/x86/boot.txt @@ -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 |