NForce2 and AMD, disconnect.

[Ian Kumlien]

Hi, again.

I did some reading on amd's site, and if the disconnect + apic fixed the
same problem as the ~500ns delay, then it could be as i suspect...

I suspect that something goes wrong with apic ack when the cpu is
disconnected and according to the amd docs we could check the
Northbridge's CLKFWDRST or isn't that avail on the outside?
(It would be interesting to see if that fixes the problem as well.)

http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/26237.PDF

I don't really have the knowledge but it would sure be nicer to fix this
by checking this than to just disable it. I dunno if there is something
we could do from within the kernel aswell with the sending of HLT but i
doubt it.

Anyways, we need a generalized patch that does better checking on the
NMI bit (like Ross' patch). 

PS. Anyone that can point me to northbridge tech docks? and CC

-- 
Ian Kumlien <pomac () vapor ! com> -- http://pomac.netswarm.net

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