[coreboot] [PATCH] Istanbul support

Arne Georg Gleditsch arne.gleditsch at numascale.com
Tue Apr 13 09:35:20 CEST 2010

Ed Swierk <eswierk at aristanetworks.com> writes:
>> Anoyone familiar with the mcp55 who can shed some light on what this
>> write is supposed to accomplish and perhaps also on why it succeeds
>> using the IO config mechanism when mmconf fails?
> That write has always caused a hang on Arista boards, even using plain
> IO accesses. I have no idea what it's supposed to do, but we've left
> it commented out with no apparent ill effects.

That's a valuable data point.  I'm also running with it disabled, no
apparent problems here either.

I'd like to push this mmconf patch upstream in some shape or form, so if
anyone would like to chime in how to approach this I'd be glad.  I could
just wrap the offending line with "#if !CONFIG_MMCONF_SUPPORT_DEFAULT"
or something, if that's acceptable.  If we can't figure out what it
affects, however, perhaps we're just as well off removing it?


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