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List:       linux-ia64
Subject:    Re: pgprot_writecombine & shub 1.x
From:       David Mosberger <davidm () napali ! hpl ! hp ! com>
Date:       2005-01-20 17:17:43
Message-ID: 16879.59319.867293.363750 () napali ! hpl ! hp ! com
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>>>>> On 20 Jan 2005 04:03:19 -0500, Jes Sorensen <jes@wildopensource.com> said:

  Jes> What about real memory and mapping it uncached? Do we need to
  Jes> play the same trick before allowing it to be mapped uncached?

It needs to be done on a granule-boundary, too, yes.

  Jes> Trying to map real memory uncached was what made me stumble
  Jes> upon the PREFETCH_VISIBILITY limitation in the PAL code.

I assume you're using this as part of the procedure outlined in
Section 4.4.11.2 of IASD v2 "Physical Addressing Attribute
Transition", right?

	--david
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