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On Aug 28 2005, at 18:39, Russell King was caught saying: > On Wed, Aug 24, 2005 at 03:12:02PM -0700, Deepak Saxena wrote: > > Version 6 of the ARM architecture introduces the concept of 16MB pages > > (supersections) and 36-bit (40-bit actually, but nobody uses this) > > physical addresses. 36-bit addressed memory and I/O and ARMv6 can > > only be mapped using supersections and the requirement on these is > > that both virtual and physical addresses be 16MB aligned.> > Have we sorted out how we handle the issue of IO vs memory outside the > normal 4GB? We can only map one or other depending on how the domains > are setup and get the correct permission behaviour. That's an arch-specific issue that we'll have to handle in the ARM code and really shouldn't impact this patch itself. FYI, all the 36-bit CPUs I know of (from Intel) only have I/O above 4G. ~Deepak -- Deepak Saxena - dsaxena@plexity.net - http://www.plexity.net Even a stopped clock gives the right time twice a day. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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