>>>>> "David" == David Mosberger <[EMAIL PROTECTED]> writes:
>>>>> On Wed, 19 Jan 2005 09:28:27 -0800, Jesse Barnes <[EMAIL PROTECTED]> said: Jesse> So I guess we need to add ia64_set_page_wc() and Jesse> ia64_set_page_uc() functions that set the appropriate page bits Jesse> or return errors if the EFI memory map says a particular mode Jesse> isn't allowed? How does that sound to you, Tony & David? Jesse> Fortunately there aren't that many users of pgprot_writecombine Jesse> so fixing them up should be easy. David> I'm still not clear which case you're concerned about: mapping David> I/O memory with WC or mapping real memory with WC. For the David> latter, I think we may need an API to allocate memory that can David> be mapped WC (if possible at all). Hmmm, What about real memory and mapping it uncached? Do we need to play the same trick before allowing it to be mapped uncached? and for IO memory mapped uncached? Trying to map real memory uncached was what made me stumble upon the PREFETCH_VISIBILITY limitation in the PAL code. Cheers, Jes - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
