Re: Page Attribute Table (PAT) support?

** Reply to message from Jeff Hartmann [off-list ref] 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

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