From: Timothy Miller <miller@techsource.com>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: PCI mapping on large memory 32-bit machines
Date: Mon, 19 May 2003 14:15:23 -0400 [thread overview]
Message-ID: <3EC91F3B.8010005@techsource.com> (raw)
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?
next reply other threads:[~2003-05-19 17:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-19 18:15 Timothy Miller [this message]
2003-05-19 18:25 ` PCI mapping on large memory 32-bit machines Richard B. Johnson
2003-05-19 22:59 ` William Lee Irwin III
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