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authorIan Campbell <ijc@hellion.org.uk>2008-02-13 20:54:58 +0000
committerIngo Molnar <mingo@elte.hu>2008-04-17 17:40:46 +0200
commit099e1377269a47ed30a00ee131001988e5bcaa9c (patch)
tree2bf2f02aa44db93a9e8b1f4ef76ac08d3a732a46 /Documentation/i386/boot.txt
parente0bf0f75bdc441abb05365abc56ee96ba44ca073 (diff)
x86: use ELF format in compressed images.
Signed-off-by: Ian Campbell <ijc@hellion.org.uk> Cc: Ian Campbell <ijc@hellion.org.uk> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: virtualization@lists.linux-foundation.org Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: virtualization@lists.linux-foundation.org Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'Documentation/i386/boot.txt')
-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 fc49b79bc1a..b5f5ba1ea66 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