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Date: Mon, 19 May 2003 14:15:23 -0400
From: Timothy Miller <miller@techsource.com>
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To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: PCI mapping on large memory 32-bit machines
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On x86 with PAE and 4 gigs of RAM or more, where do memory-mapped I/O 
devices get mapped (in the physical address space)?  Most PCI devices 
can't handle 64-bit addresses.  Can PC chipsets physically remap some of 
the RAM to above 4 gig?  Or do you just lose that much RAM?  If both RAM 
and some I/O device are mapped to the same location, isn't there a conflict?