Re: [patches] [patch 3/5] x86: Add PCI extended config space access for AMD Barcelona

H. Peter Anvin
2007-09-06T09:52:43Z

Arne Georg Gleditsch wrote:
> "Yinghai Lu" <yhlu.kernel@gmail.com> writes:
>> mmconfig is set in NB ( in new CPU), Do we still need to set mmconfig
>> in SB like mcp55?
>
> I wasn't aware that the family 10h-chips had MSRs for setting the
> mmconfig address space directly in the NB (core?). Please disregard
> my previous comment...
>

Well, to a first order of approximations, *all* northbridges have some
sort of hardware registers to set mmconfig. We were talking yesterday
that it might just make more sense to have code for various northbridges
to configure mmconfig directly, just like we do for IRQ routing (we
can't trust the BIOS there, either.)

-hpa