From: Ralf Baechle <ralf@linux-mips.org>
To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Cc: Stanislaw Skowronek <sskowron@ET.PUT.Poznan.PL>,
linux-mips@linux-mips.org
Subject: Re: 32-bit ABI
Date: Sat, 24 Apr 2004 10:26:55 +0200 [thread overview]
Message-ID: <20040424082655.GC26165@linux-mips.org> (raw)
In-Reply-To: <Pine.LNX.4.55.0404241021140.14494@jurand.ds.pg.gda.pl>
On Sat, Apr 24, 2004 at 10:23:34AM +0200, Maciej W. Rozycki wrote:
> > Actually the R10000 way to do something like this is to use the uncached
> > attribute like in the Origin. It allows using the same physical address
> > space several times for different purposes. So on node 0 of an Origin
> > indeed memory starts at physical address zero and there is no hole for
> > the firmware. IP27 is afaik the only system using this R10000 feature
> > which surprises me a little due to the otherwise great similarity of these
> > two systems.
>
> That precludes the firmware from being run cached, though. Not very
> nice, especially for callbacks, but perhaps a bit easier to deal with.
Sane firmware copies itself to RAM at the earliest possible stage anyway -
ROMs are way too slow.
Ralf
next prev parent reply other threads:[~2004-04-24 8:27 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-23 8:02 MC Parity Error Florian Lohoff
2004-04-23 13:11 ` Maciej W. Rozycki
2004-04-23 16:45 ` Ralf Baechle
2004-04-23 17:11 ` Maciej W. Rozycki
2004-04-23 20:43 ` Dominic Sweetman
2004-04-23 21:06 ` Maciej W. Rozycki
2004-04-24 6:28 ` 32-bit ABI Stanislaw Skowronek
2004-04-24 7:09 ` Thiemo Seufer
2004-04-24 7:17 ` Ralf Baechle
2004-04-24 7:31 ` Stanislaw Skowronek
2004-04-24 7:38 ` Ralf Baechle
2004-04-24 7:46 ` Stanislaw Skowronek
2004-04-24 7:51 ` Maciej W. Rozycki
2004-04-24 7:55 ` Ralf Baechle
2004-04-24 8:07 ` Maciej W. Rozycki
2004-04-24 8:14 ` Stanislaw Skowronek
2004-04-24 8:18 ` Ralf Baechle
2004-04-24 8:23 ` Maciej W. Rozycki
2004-04-24 8:26 ` Ralf Baechle [this message]
2004-04-24 8:49 ` Maciej W. Rozycki
2004-04-24 8:14 ` Ralf Baechle
2004-04-24 8:17 ` Stanislaw Skowronek
2004-04-24 8:26 ` Thiemo Seufer
2004-04-24 7:37 ` Thiemo Seufer
2004-04-24 7:18 ` Maciej W. Rozycki
2004-04-24 7:34 ` Stanislaw Skowronek
2004-04-24 7:44 ` Ralf Baechle
2004-04-24 7:47 ` Stanislaw Skowronek
2004-04-24 7:48 ` Maciej W. Rozycki
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