diff options
| author | H. Peter Anvin <hpa@zytor.com> | 2007-07-11 15:18:33 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-12 13:55:54 -0400 |
| commit | 85414b693ac037d709582a167a330db3a5d186d8 (patch) | |
| tree | 78836556d59e28c335d2ba5be347c06f4298432e /Documentation | |
| parent | 1d67953f2bda8876045c24ae58841f27d9bb7572 (diff) | |
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')
| -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 | |||
| 37 | 0x1d0 unsigned long EFI memory descriptor map pointer | 37 | 0x1d0 unsigned long EFI memory descriptor map pointer |
| 38 | 0x1d4 unsigned long EFI memory descriptor map size | 38 | 0x1d4 unsigned long EFI memory descriptor map size |
| 39 | 0x1e0 unsigned long ALT_MEM_K, alternative mem check, in Kb | 39 | 0x1e0 unsigned long ALT_MEM_K, alternative mem check, in Kb |
| 40 | 0x1e4 unsigned long Scratch field for the kernel setup code | ||
| 40 | 0x1e8 char number of entries in E820MAP (below) | 41 | 0x1e8 char number of entries in E820MAP (below) |
| 41 | 0x1e9 unsigned char number of entries in EDDBUF (below) | 42 | 0x1e9 unsigned char number of entries in EDDBUF (below) |
| 42 | 0x1ea unsigned char number of entries in EDD_MBR_SIG_BUFFER (below) | 43 | 0x1ea unsigned char number of entries in EDD_MBR_SIG_BUFFER (below) |