On Mon, Mar 10, 2014 at 5:00 PM, ron minnich <[email protected]> wrote: > I think the bigger question that we need to answer, now that we know > it's doable, is whether we want paging or not. We may not. I was hoping > it would give us a more convenient way to cover cache-disabled, write-back, > and write-through ranges without all the fuss of MTRRs. But there may be > other issues that make it impractical. I'm open to discussion. >
I assume you were wanting use PAT to cover different regions? Sadly, the precedence for "upgrading" the caching type is from UC to WC. There is no way to turn a UC MTRR region into a WP region through PAT. At least that's what I recall when I looked it up a couple of weeks ago. -Aaron -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
