From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Thu, 02 Feb 2006 16:41:50 +0000 (GMT) Received: from mipsfw.mips-uk.com ([194.74.144.146]:24587 "EHLO bacchus.net.dhis.org") by ftp.linux-mips.org with ESMTP id S3465646AbWBBQla (ORCPT ); Thu, 2 Feb 2006 16:41:30 +0000 Received: from denk.linux-mips.net (denk.linux-mips.net [127.0.0.1]) by bacchus.net.dhis.org (8.13.4/8.13.4) with ESMTP id k12GkqdI020781; Thu, 2 Feb 2006 16:46:52 GMT Received: (from ralf@localhost) by denk.linux-mips.net (8.13.4/8.13.4/Submit) id k12GkqPg020780; Thu, 2 Feb 2006 16:46:52 GMT Date: Thu, 2 Feb 2006 16:46:52 +0000 From: Ralf Baechle To: Atsushi Nemoto Cc: linux-mips@linux-mips.org Subject: Re: [PATCH] TX49 MFC0 bug workaround Message-ID: <20060202164652.GA20462@linux-mips.org> References: <20060203.013401.41198517.anemo@mba.ocn.ne.jp> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060203.013401.41198517.anemo@mba.ocn.ne.jp> User-Agent: Mutt/1.4.2.1i Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 10307 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: ralf@linux-mips.org Precedence: bulk X-list: linux-mips On Fri, Feb 03, 2006 at 01:34:01AM +0900, Atsushi Nemoto wrote: > If mfc0 $12 follows store and the mfc0 is last instruction of a > page and fetching the next instruction causes TLB miss, the result > of the mfc0 might wrongly contain EXL bit. > > ERT-TX49H2-027, ERT-TX49H3-012, ERT-TX49HL3-006, ERT-TX49H4-008 > > Workaround: mask EXL bit of the result or place a nop before mfc0. Applied, Ralf