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-rw-r--r--Documentation/i386/boot.txt18
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/i386/boot.txt b/Documentation/i386/boot.txt
index fc49b79bc1ab..b5f5ba1ea668 100644
--- a/Documentation/i386/boot.txt
+++ b/Documentation/i386/boot.txt
@@ -170,6 +170,8 @@ Offset Proto Name Meaning
0238/4 2.06+ cmdline_size Maximum size of the kernel command line
023C/4 2.07+ hardware_subarch Hardware subarchitecture
0240/8 2.07+ hardware_subarch_data Subarchitecture-specific data
+0248/4 2.08+ compressed_payload_offset
+024C/4 2.08+ compressed_payload_length
(1) For backwards compatibility, if the setup_sects field contains 0, the
real value is 4.
@@ -512,6 +514,22 @@ Protocol: 2.07+
A pointer to data that is specific to hardware subarch
+Field name: compressed_payload_offset
+Type: read
+Offset/size: 0x248/4
+Protocol: 2.08+
+
+ If non-zero then this field contains the offset from the end of the
+ real-mode code to the compressed payload. The compression format
+ should be determined using the standard magic number, currently only
+ gzip is used.
+
+Field name: compressed_payload_length
+Type: read
+Offset/size: 0x24c/4
+Protocol: 2.08+
+
+ The length of the compressed payload.
**** THE KERNEL COMMAND LINE