From: H. Peter Anvin Date: Thu, 15 Jan 2009 00:07:38 +0000 (-0800) Subject: bzip2/lzma: update boot protocol specification X-Git-Tag: v2.6.30-rc1~625^2~8 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ee287587dafd77fd211e50637561224605c214b4;p=karo-tx-linux.git 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 --- 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