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List:       linux-ia64
Subject:    Re: pgprot_writecombine & shub 1.x
From:       Jesse Barnes <jbarnes () sgi ! com>
Date:       2005-01-19 17:56:59
Message-ID: 200501190956.59510.jbarnes () sgi ! com
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On Wednesday, January 19, 2005 9:53 am, David Mosberger wrote:
> I'm still not clear which case you're concerned about: mapping I/O
> memory with WC or mapping real memory with WC.  For the latter, I
> think we may need an API to allocate memory that can be mapped WC (if
> possible at all).

Oh, I thought I said that in the first message, I'm talking about I/O memory 
here.  In any event though, we shouldn't be mapping anything with the WC 
attribute that the EFI memory map doesn't allow.  And yes, we probably do 
need a special allocator for mapping regular memory with WC or UC attributes 
to avoid mapping the same region with different attributes.

Thanks,
Jesse
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