[ros-kernel] Mapping of page table
ekohl at rz-online.de
Fri Nov 7 22:45:53 CET 2003
"Vizzini" <vizzini at plasmic.com> wrote:
> I'd also like to discuss moving the kernel/hal back down to 0x80000000
> while we're discussing this. Forcing /3GB has the effect of depriving
> the cache manager of virtual memory, which on big configurations may be
> a bad thing. What does everyone else think?
I think that's a good idea. AFAIR, Sven Schreiber wrote in his book
'Undocumented Windows 2000 Secrets' that the layout looks like this:
0x80000000 - 0x8000FFFF (64KB) Mapped IVT, BIOS data, etc.
0x80010000 - 0x800FFFFF Hal
I think mapping the lowest 64k of real mode memory (IVT, BIOS data, etc)
into kernel space could be useful for BIOS calls, especially for the VGA
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