Re: HIGH MEMORY access

From: Andi Kleen (ak@muc.de)
Date: Fri Mar 03 2000 - 20:30:07 EST


x_coder@hotmail.com (Lyle Coder) writes:

> Hello All,
> I have a question. The BIOS engineers said that the MPS tables will be in
> the highest region of the available RAM... greater than 1 GB if so much
> memory is available.
> Further more, the MPS tables will be in a region reported "unusable" by E820
> (Thats mentioned in the E820 spec).
>
> So my question is this...
> 1) How should we initialize mappings for arbitrary RAM above 1GB so early
> on? Should we just set aside a page directory for temporary installation of
> translations and provide a clean API to do so? We will need this for ACPI
> and PAE too.

Can't you just use set_fixmap, like the current smp code already does for
MP bios tables ?

-Andi

-- 
This is like TV. I don't like TV.

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