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| author | H. Peter Anvin <hpa@zytor.com> | 2007-07-11 12:18:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-12 10:55:54 -0700 |
| commit | 85414b693ac037d709582a167a330db3a5d186d8 (patch) | |
| tree | 78836556d59e28c335d2ba5be347c06f4298432e /Documentation/i386 | |
| parent | 1d67953f2bda8876045c24ae58841f27d9bb7572 (diff) | |
| download | linux-85414b693ac037d709582a167a330db3a5d186d8.tar.gz | |
Define zero-page offset 0x1e4 as a scratch field, and use it
The relocatable kernel code needs a scratch field for the decompressor to determine its own location. It was using a location inside struct screen_info; reserve a free location and document it as scratch instead. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/i386')
| -rw-r--r-- | Documentation/i386/zero-page.txt | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/i386/zero-page.txt b/Documentation/i386/zero-page.txt index c04a421f4a7c..75b3680c41eb 100644 --- a/Documentation/i386/zero-page.txt +++ b/Documentation/i386/zero-page.txt @@ -37,6 +37,7 @@ Offset Type Description 0x1d0 unsigned long EFI memory descriptor map pointer 0x1d4 unsigned long EFI memory descriptor map size 0x1e0 unsigned long ALT_MEM_K, alternative mem check, in Kb +0x1e4 unsigned long Scratch field for the kernel setup code 0x1e8 char number of entries in E820MAP (below) 0x1e9 unsigned char number of entries in EDDBUF (below) 0x1ea unsigned char number of entries in EDD_MBR_SIG_BUFFER (below) |