From owner-freebsd-hackers@FreeBSD.ORG Sat Dec 29 22:08:12 2007 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 3C6DA16A417 for ; Sat, 29 Dec 2007 22:08:12 +0000 (UTC) (envelope-from bakul@bitblocks.com) Received: from mail.bitblocks.com (mail.bitblocks.com [64.142.15.60]) by mx1.freebsd.org (Postfix) with ESMTP id 255C513C43E for ; Sat, 29 Dec 2007 22:08:11 +0000 (UTC) (envelope-from bakul@bitblocks.com) Received: from bitblocks.com (localhost.bitblocks.com [127.0.0.1]) by mail.bitblocks.com (Postfix) with ESMTP id 0E9CD5B2E; Sat, 29 Dec 2007 14:06:27 -0800 (PST) To: Peter Jeremy In-reply-to: Your message of "Sun, 30 Dec 2007 08:46:44 +1100." <20071229214644.GY40785@server.vk2pj.dyndns.org> Date: Sat, 29 Dec 2007 14:06:27 -0800 From: Bakul Shah Message-Id: <20071229220628.0E9CD5B2E@mail.bitblocks.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Architectures with strict alignment? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 29 Dec 2007 22:08:12 -0000 > (though the AMD29K could apparently generate > dummy bus cycles to limit the number of bit transitions on any cycle > to reduce the I/O load). Are you sure it was the amd29k? I don't recall anything like that (and am too lazy to dig out its datasheets!). It too requiredd strict alignment though you could fix up unaligned accesses in a trap handler at some cost.