Re: Via 694X based SMB boards (Apollo Pro133A)

[Nate Lawson <nate-Y6VGUYTwhu0@public.gmane.org>]

On Thu, 15 Jan 2004, Dino Klein wrote:
> I'm playing around with my Abit VP6 board - trying to get it into S3, and monkeying around with the Cx states.
> I'm having a problem figuring out how the Via VT82C686B chipset works with two processors, since a datasheet I found for it
> specifies only one P_BLK. Perhaps I have an older datasheet...
>
> Anyway, unless someone tells me that a the Apollo Pro133A chipset doesn't properly support SMP, I would like to ask other people out
> there who have 694X(DP) SMP board to take a look at their DSDT and send me the lines containing the processors definitions. If you
> don't know how to find it, just send me the whole thing, and I'll figure it out; maybe this way I'll figure out the address of the
> other P_BLK.

If you're looking to do throttling, some SMP boards support it.  The most
common way is with a shared P_BLK.  Either both Processor objects in the
ASL will have the same P_BLK or one will have it and the other will have a
NULL entry.  Either way, setting throttling through the P_BLK _ONCE_ (not
once per processor) sets the throttling level.

I've never seen an SMP board with separate P_BLKs per processor.  I've
also never seen an SMP board that supported C2 or higher via a shared
P_LVL2 register or separate _CST objects if it had different per-processor
P_LVL2 registers.  If anyone is aware of one of these, I'm very
interested.

-Nate


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