From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from penguin.netx4.com (embeddededge.com [209.113.146.155]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTP id A774D679F5 for ; Tue, 17 May 2005 07:02:38 +1000 (EST) In-Reply-To: <428905F8.4030204@mvista.com> References: <1116222720.5095.86.camel@gaston> <7d5cfed0ee1edade8050d2c4da94b3f1@freescale.com> <1116255938.5095.133.camel@gaston> <1116261725.5095.139.camel@gaston> <4288DFCB.2080208@mvista.com> <4288E10A.9030408@mvista.com> <2dd506f0a6d4b03e771c0bc9d80735e6@embeddededge.com> <428905F8.4030204@mvista.com> Mime-Version: 1.0 (Apple Message framework v622) Content-Type: text/plain; charset=US-ASCII; format=flowed Message-Id: <751dc096bc613d131421683f6ba4c68a@embeddededge.com> From: Dan Malek Date: Mon, 16 May 2005 17:02:27 -0400 To: "Mark A. Greer" Cc: linuxppc-dev@ozlabs.org, John Reiser Subject: Re: 2GB address space limit on 32-bit PowerPC Macintosh List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On May 16, 2005, at 4:43 PM, Mark A. Greer wrote: > I think I understand all of that. I wasn't clear in my email. I was > talking about "fixing" such that 3GB works (i.e., io_block_mapping are > above 3GB virt, if possible) not "fixing" such that we can get rid of > io_block_mapping altogether. We still need io_block_mapping for > exactly the reasons you state. I think I've seen hacks from you that temporarily set up BATs for serial console access until the BAT is forcefully re-used later :-) I just wanted to document the issue for everyone, that breaking this is more than just a five minute fix and test exercise (which may only further obfuscate a hack than actually change anything) :-) Thanks. -- Dan