From owner-freebsd-alpha  Wed Nov 13  8: 6:31 2002
Delivered-To: freebsd-alpha@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 7FEC637B401
	for <freebsd-alpha@FreeBSD.ORG>; Wed, 13 Nov 2002 08:06:30 -0800 (PST)
Received: from duke.cs.duke.edu (duke.cs.duke.edu [152.3.140.1])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 70FB043E75
	for <freebsd-alpha@FreeBSD.ORG>; Wed, 13 Nov 2002 08:06:29 -0800 (PST)
	(envelope-from gallatin@cs.duke.edu)
Received: from grasshopper.cs.duke.edu (grasshopper.cs.duke.edu [152.3.145.30])
	by duke.cs.duke.edu (8.9.3/8.9.3) with ESMTP id LAA15913;
	Wed, 13 Nov 2002 11:05:55 -0500 (EST)
Received: (from gallatin@localhost)
	by grasshopper.cs.duke.edu (8.11.6/8.9.1) id gADG5Pn51320;
	Wed, 13 Nov 2002 11:05:25 -0500 (EST)
	(envelope-from gallatin@cs.duke.edu)
From: Andrew Gallatin <gallatin@cs.duke.edu>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Message-ID: <15826.30789.443260.294559@grasshopper.cs.duke.edu>
Date: Wed, 13 Nov 2002 11:05:25 -0500 (EST)
To: Matthias Buelow <mkb@mukappabeta.de>
Cc: Terry Lambert <tlambert2@mindspring.com>,
	Wartan Hachaturow <wart@tepkom.ru>, freebsd-alpha@FreeBSD.ORG
Subject: Re: Any TODO out there?
In-Reply-To: <3DD27009.90003@mukappabeta.de>
References: <20021113085124.GA23125@mojo.tepkom.ru>
	<3DD22648.35D7B3DE@mindspring.com>
	<3DD27009.90003@mukappabeta.de>
X-Mailer: VM 6.75 under 21.1 (patch 12) "Channel Islands" XEmacs Lucid
Sender: owner-freebsd-alpha@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-alpha.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-alpha>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-alpha>
X-Loop: FreeBSD.org


Matthias Buelow writes:
 > Terry Lambert wrote:
 > 
 > > FreeBSD Alpha doesn't work on >2G because some drivers need to
 > > use the bus space functions to make sure all DMAs occur in the
 > > window accessible to the various busses.  For an small overview:
 > 
 > Are you sure the limit isn't 1Gig?  I have a PWS with 1.5GB and on 
 > reporting crashes on boot with 4.7 to the list, I was told it was 
 > because fbsd doesn't have DMA bouncing or whatever to < 1GB (yet).

Its 1GB on most machines, 2GB on some newer ones.

And its not bouncing, its re-mapping.

Drew

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-alpha" in the body of the message