Hi,
I don't know of any alignment restrictions other than that specified in the BAR. SeaBIOS doesn't setup MTRRs right now for pref mem.
Ok.
Looks like each bus uses 1meg alignment for all devices on that bus.
That looks like a random pick to me. Isaku? Looking at all devices behind the bridge, then pick something where all bars fit in and are properly aligned should work, right?
cheers, Gerd