From: James Bottomley <James.Bottomley@steeleye.com>
To: Grant Grundler <grundler@parisc-linux.org>
Cc: John Marvin <jsm@udlkern.fc.hp.com>,
PARISC list <parisc-linux@lists.parisc-linux.org>
Subject: Re: [parisc-linux] Proposal for altering our Page Table layouts
Date: 12 Apr 2004 09:20:25 -0500 [thread overview]
Message-ID: <1081779626.2060.14.camel@mulgrave> (raw)
In-Reply-To: <20040412043212.GA16377@colo.lackof.org>
On Sun, 2004-04-11 at 23:32, Grant Grundler wrote:
> I was just looking at the pluto "PA_RISC Physical Address Map" and
> all RAM is physically located < 1TB (40 bits).
> Do we have to worry about the GMMIO (MMIO space above 4GB) in
> "F-space" above 1TB?
No, the problem is merely where the page tables go. They have to be
addressed physically in the page table directories, so if we only allow
for 40 bits of physical addressing, the page tables have to be located
within the first 40 bits of memory. This doesn't limit the machine
memory size, merely the location of the page tables.
James
next prev parent reply other threads:[~2004-04-12 14:29 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-09 14:38 [parisc-linux] Proposal for altering our Page Table layouts John Marvin
2004-04-11 13:13 ` James Bottomley
2004-04-12 4:32 ` Grant Grundler
2004-04-12 14:20 ` James Bottomley [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-04-12 23:31 John Marvin
2004-04-12 23:44 ` James Bottomley
2004-04-13 14:28 ` Carlos O'Donell
2004-04-09 12:16 James Bottomley
2004-04-09 20:12 ` Joel Soete
2004-04-10 18:49 ` Carlos O'Donell
2004-04-10 19:11 ` James Bottomley
2004-04-10 21:46 ` Carlos O'Donell
2004-04-10 23:22 ` James Bottomley
2004-04-10 19:12 ` James Bottomley
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