From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 2941 invoked by alias); 22 Jul 2008 15:54:09 -0000 Received: (qmail 2933 invoked by uid 22791); 22 Jul 2008 15:54:08 -0000 X-Spam-Check-By: sourceware.org Received: from yw-out-1718.google.com (HELO yw-out-1718.google.com) (74.125.46.155) by sourceware.org (qpsmtpd/0.31) with ESMTP; Tue, 22 Jul 2008 15:53:51 +0000 Received: by yw-out-1718.google.com with SMTP id 9so786712ywk.66 for ; Tue, 22 Jul 2008 08:53:49 -0700 (PDT) Received: by 10.141.169.4 with SMTP id w4mr43676rvo.75.1216742028529; Tue, 22 Jul 2008 08:53:48 -0700 (PDT) Received: by 10.141.75.19 with HTTP; Tue, 22 Jul 2008 08:53:48 -0700 (PDT) Message-ID: Date: Tue, 22 Jul 2008 15:54:00 -0000 From: "Anthony Tonizzo" To: "eCos Disuss" MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Mailing-List: contact ecos-discuss-help@ecos.sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: ecos-discuss-owner@ecos.sourceware.org Subject: [ECOS] Re: Init sequence for enabling MMU at mpc5xx fails X-SW-Source: 2008-07/txt/msg00078.txt.bz2 Andrey: The MMU uses burst access to DRAM. It might very well be that your burst patterns in the UPM memory are not quite correct. You can check this by setting the BIH bit in the ORx register for your DRAM. This will inhibit the use of UPM burst patterns and use single beat patterns instead. If your board now works after you enable the MMU, then you know where where to look. Tony -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss