On Mon, 2007-07-30 at 22:40 -0600, Eric W. Biederman wrote: > "Huang, Ying" <[EMAIL PROTECTED]> writes: > > > This patch adds document for EFI x86_64 support. The boot parameters > > added are documented in Documentation/i386/zero-page.txt. The setup > > and operation guide of EFI based system is documented in > > Documentation/x86_64/uefi.txt. > > > > Signed-off-by: Chandramouli Narayanan <[EMAIL PROTECTED]> > > Signed-off-by: Huang Ying <[EMAIL PROTECTED]> > > > > --- > > > > i386/zero-page.txt | 18 ++++++++++++++---- > > x86_64/uefi.txt | 42 ++++++++++++++++++++++++++++++++++++++++++ > > 2 files changed, 56 insertions(+), 4 deletions(-) > > > > Index: linux-2.6.23-rc1/Documentation/i386/zero-page.txt > > =================================================================== > > --- linux-2.6.23-rc1.orig/Documentation/i386/zero-page.txt 2007-07-30 > > 11:28:45.000000000 +0800 > > +++ linux-2.6.23-rc1/Documentation/i386/zero-page.txt 2007-07-30 > > 11:29:28.000000000 +0800 > > @@ -31,11 +31,11 @@ > > 0xb0 - 0x13f Free. Add more parameters here if you really > > need them. > > 0x140- 0x1be EDID_INFO Video mode setup > > > > -0x1c4 unsigned long EFI system table pointer > > -0x1c8 unsigned long EFI memory descriptor size > > -0x1cc unsigned long EFI memory descriptor version > > +0x1c4 unsigned long EFI system table pointer* > > +0x1c8 unsigned long EFI memory descriptor size* > > +0x1cc unsigned long EFI memory descriptor version* > > 0x1d0 unsigned long EFI memory descriptor map pointer > > -0x1d4 unsigned long EFI memory descriptor map size > > +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) > > @@ -87,3 +87,13 @@ > > 0x2d0 - 0xd00 E820MAP > > 0xd00 - 0xeff EDDBUF (edd.S) for disk signature read sector > > 0xd00 - 0xeeb EDDBUF (edd.S) for edd data > > + > > +Changes for x86_64 implementation: > > +--------------------------------- > > +For alignment purposes, the following parameters are rearranged. > > + > > +0x1b8 unsigned long EFI system table pointer > > +0x1c0 unsigned long EFI Loader signature > > +0x1c4 unsigned long EFI memory descriptor size > > +0x1c8 unsigned long EFI memory descriptor version > > +0x1cc unsigned long EFI memory descriptor map size > > Huh? It is the same protocol. Unless there are specific issues such > as pointers being to small we should remain 100% the same for both > arch/i386 and arch/x86_64 This variation looks like a serious > bug.
The parameters are rearranged, because the pointer is too small. For example, the EFI system table pointer is 8 bytes in x86_64, while it is 4 bytes in i386. Best Regards, Huang Ying - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
