Re: Page Attribute Table (PAT) support?

Timur Tabi (ttabi@interactivesi.com)
Wed, 24 Jan 2001 14:30:10 -0600


** Reply to message from Jeff Hartmann <jhartmann@valinux.com> on Wed, 24 Jan
2001 11:45:43 -0700

> I'm actually writing support for the PAT as we speak. I already have
> working code for PAT setup. Just having a parameter for ioremap is not
> enough, unfortunately. According to the Intel Architecture Software
> Developer's Manual we have to remove all mappings of the page that are
> cached.

For our specific purposes, that's not important. We already flush the cache
before we create uncached regions (via ioremap_nocache). I understand that as a
general Linux feature, you can't ignore cache incoherency, but I don't think
it's a hard requirement.

-- 
Timur Tabi - ttabi@interactivesi.com
Interactive Silicon - http://www.interactivesi.com

When replying to a mailing-list message, please direct the reply to the mailing list only. Don't send another copy to me. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/