From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Fri, 21 Sep 2007 14:47:57 +0100 (BST) Received: from localhost.localdomain ([127.0.0.1]:49030 "EHLO dl5rb.ham-radio-op.net") by ftp.linux-mips.org with ESMTP id S20025028AbXIUNrz (ORCPT ); Fri, 21 Sep 2007 14:47:55 +0100 Received: from denk.linux-mips.net (denk.linux-mips.net [127.0.0.1]) by dl5rb.ham-radio-op.net (8.14.1/8.13.8) with ESMTP id l8LDlsTj008243; Fri, 21 Sep 2007 14:47:54 +0100 Received: (from ralf@localhost) by denk.linux-mips.net (8.14.1/8.14.1/Submit) id l8LDlrRO008242; Fri, 21 Sep 2007 14:47:53 +0100 Date: Fri, 21 Sep 2007 14:47:53 +0100 From: Ralf Baechle To: Sagar Borikar Cc: Steve Graham , linux-mips@linux-mips.org Subject: Re: O2 RM7000 Issues Message-ID: <20070921134753.GA8090@linux-mips.org> References: <340C71CD25A7EB49BFA81AE8C839266757076E@BBY1EXM10.pmc_nt.nt.pmc-sierra.bc.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <340C71CD25A7EB49BFA81AE8C839266757076E@BBY1EXM10.pmc_nt.nt.pmc-sierra.bc.ca> User-Agent: Mutt/1.5.14 (2007-02-12) 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: 16631 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 Thu, Sep 20, 2007 at 11:27:18PM -0700, Sagar Borikar wrote: > rm7k_wait_irqoff patch doesn't seem to improve the things for illegal instructions for E9k core. > But many customers have reported that they do get illegal instruction when ICACHE_REFILLS_WORKAROUND_WAR is not enabled. This is due to a very unfortunate design issue in the RM7000 / RM9000. So it wasn't done by accident but with full intention but I call it a bug anyway. So this also means all revs of these cores are affected and if the issue is not being hit for a particular workload and where ICACHE_REFILLS_WORKAROUND_WAR is disabled then that that's by coincidence not engineering. Ralf