From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from zipcode.az.mvista.com (rav-az.mvista.com [65.200.49.157]) by ozlabs.org (Postfix) with ESMTP id 7858267A30 for ; Sat, 22 Jan 2005 08:28:08 +1100 (EST) Message-ID: <41F16B51.1000003@mvista.com> Date: Fri, 21 Jan 2005 13:51:29 -0700 From: Randy Vinson MIME-Version: 1.0 To: annamaya References: <20050121201632.69802.qmail@web53804.mail.yahoo.com> In-Reply-To: <20050121201632.69802.qmail@web53804.mail.yahoo.com> Content-Type: text/plain; charset=us-ascii; format=flowed Cc: linuxppc-embedded@ozlabs.org Subject: Re: Kernel booting issues on a MPC8270 board List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , annamaya wrote: > I debugged this problem a little more and realized > that the reset was happenning right after the > execution of the first kernel instruction at > 0x0000000c. The instruction at this location was > "mfpvr r28". I traced this back to a snippet of code > that was dealing with pipeline depth issues on the > MPC8260. Once I commented this code out, more > instructions were issued but the reboot happens > elsewhere. I am not able to pin-point the location of > the debug since my BDI fails to catch the reset when > it happens. Can someone point me to the cause of this > situation? Thanks in advance. I'm not familiar with the 8260, but this sounds very much like a hardware watchdog is expiring somewhere. Check to see if the hardware has an on-board watchdog (most likely in the timer section of the 8260) and see if the firmware has armed it. If so, you'll need to add a snippet of code to disable the watchdog to allow boot-up to complete. Randy Vinson