From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from oss.sgi.com (localhost [127.0.0.1]) by oss.sgi.com (8.12.5/8.12.5) with ESMTP id g6OEqDRw020131 for ; Wed, 24 Jul 2002 07:52:13 -0700 Received: (from majordomo@localhost) by oss.sgi.com (8.12.5/8.12.3/Submit) id g6OEqDHx020130 for linux-mips-outgoing; Wed, 24 Jul 2002 07:52:13 -0700 X-Authentication-Warning: oss.sgi.com: majordomo set sender to owner-linux-mips@oss.sgi.com using -f Received: from dea.linux-mips.net (shaft17-f182.dialo.tiscali.de [62.246.17.182]) by oss.sgi.com (8.12.5/8.12.5) with SMTP id g6OEq7Rw020120 for ; Wed, 24 Jul 2002 07:52:08 -0700 Received: (from ralf@localhost) by dea.linux-mips.net (8.11.6/8.11.6) id g6OEqdm28375; Wed, 24 Jul 2002 16:52:39 +0200 Date: Wed, 24 Jul 2002 16:52:39 +0200 From: Ralf Baechle To: "Maciej W. Rozycki" , "Kevin D. Kissell" , linux-mips@fnet.fr, linux-mips@oss.sgi.com Subject: Re: [patch] linux: cpu_probe(): remove 32-bit CPU bits for MIPS64 Message-ID: <20020724165239.F28010@dea.linux-mips.net> References: <3D3DC6E6.AFF9CBFD@mips.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: <3D3DC6E6.AFF9CBFD@mips.com>; from kevink@mips.com on Tue, Jul 23, 2002 at 02:13:10PM -0700 X-Accept-Language: de,en,fr X-Spam-Status: No, hits=-4.4 required=5.0 tests=IN_REP_TO version=2.20 X-Spam-Level: Sender: owner-linux-mips@oss.sgi.com Precedence: bulk Maciej, > I don't think it's possible to be fully achieved. Some differences will > have to exist, at least in the headers, but likely within the arch tree as > well. The reason is binary code size or perfomance -- having R3000 > support code in mips64 binaries is simply ridiculous as is using 32-bit > operations with 64-bit data on a 64-bit CPU. However, it is worth trying > to minimize visible differences where possible, e.g. by convincing the > compiler to optimize irrelevant bits away. In this particular case all the bloat is just in __init code, could that convince you? Ralf