Messages in this thread | | | Date | Mon, 12 Aug 2002 12:07:19 +0200 (CEST) | From | Ingo Molnar <> | Subject | Re: [patch] tls-2.5.31-C3 |
| |
On Mon, 12 Aug 2002, Stephen Rothwell wrote:
> > - .quad 0x0040920000000000 /* 0x40 APM set up for bad BIOS's */ > > - .quad 0x00409a0000000000 /* 0x48 APM CS code */ > > - .quad 0x00009a0000000000 /* 0x50 APM CS 16 code (16 bit) */ > > - .quad 0x0040920000000000 /* 0x58 APM DS data */ > > + .quad 0x0040920000000000 /* 0x80 APM set up for bad BIOS's */ > > + .quad 0x00409a0000000000 /* 0x88 APM CS code */ > > + .quad 0x00009a0000000000 /* 0x90 APM CS 16 code (16 bit) */ > > + .quad 0x0040920000000000 /* 0x98 APM DS data */ > > I just lost 0x40 which needs to be exactly 0x40 if it is do its job > (i.e. cope with brain dead BIOS writers using 0x40 as a segment offset > in protected mode ...
you can save/restore 0x40 in kernel-space if you need to no problem.
> The idea is that segment 0x40 maps from physical address 0x400 to the > end of the first physical page. As a real mode program would (more or > less) expect it to.
so you are using the kernel's GDT in real mode as well?
Ingo
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |