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List:       linux-ia64
Subject:    Re: pgprot_writecombine & shub 1.x
From:       Jesse Barnes <jbarnes () sgi ! com>
Date:       2005-01-19 17:28:27
Message-ID: 200501190928.28075.jbarnes () sgi ! com
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On Wednesday, January 12, 2005 10:51 am, Jim Hull wrote:
> I'm not really qualified to design the right linux interfaces, but to be
> IPF compliant, you need to change all such places to first consult the EFI
> memory map.  Whether you do this once at boot time, on every call, whether
> to fail an unsupported request or remap the attribute to something the
> platform can support (e.g., mapping WC to UC), is all up to you.

So I guess we need to add ia64_set_page_wc() and ia64_set_page_uc() functions 
that set the appropriate page bits or return errors if the EFI memory map 
says a particular mode isn't allowed?  How does that sound to you, Tony & 
David?  Fortunately there aren't that many users of pgprot_writecombine so 
fixing them up should be easy.

Thanks,
Jesse
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