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authorH. Peter Anvin <hpa@linux.intel.com>2009-01-15 03:07:38 +0300
committerH. Peter Anvin <hpa@linux.intel.com>2009-01-15 03:07:38 +0300
commitee287587dafd77fd211e50637561224605c214b4 (patch)
tree13ec1307649f0efb0d0de035782041edfe5a2ce1 /Documentation/x86/boot.txt
parent95c4bff0308eb0819436b730a836846d3e784657 (diff)
downloadlinux-ee287587dafd77fd211e50637561224605c214b4.tar.xz
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.txt5
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