From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Roese Date: Thu, 23 Oct 2008 06:02:30 +0200 Subject: [U-Boot] Hangs at relocation on 460EX Target In-Reply-To: <20081023005908.GA17964@crust.elkhashab.com> References: <20081021153706.GA21379@crust.elkhashab.com> <200810220712.30708.sr@denx.de> <20081023005908.GA17964@crust.elkhashab.com> Message-ID: <200810230602.31027.sr@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On Thursday 23 October 2008, Ayman M. El-Khashab wrote: > On Wed, Oct 22, 2008 at 07:12:30AM +0200, Stefan Roese wrote: > > Yes, there have been issues with the "old" autocalibration code on some > > boards. That's one reason that AMCC provided a new version just a few > > weeks ago: > > Thanks Stefan, I've got the hardware mostly working now. Great, congrats. > The new > calibration code did work once I got past another issue. I'll try to > describe it here b/c It *might* be a bug, but I wasn't 100% sure. > > First, I am using registered ecc dimms which appears to be handled in > cpu/ppc4xx/44x_spd_ddr2.c I personally have never used a registered DIMM on the 4xx systems. And I don't know of any systems that do. So it could be that this is still untested and buggy. > However, what I found by observing the registers > with the abatron was that the SDRAM_MCOPT1_RDEN was not set for the > registered DIMM. Following the code, it looks like it should have been set > if "registered" was set, but it does not appear that it worked correctly. > So of course we were off by 1/2. I forced the bit in the mcopt1 variable > and that fixed all the problems. Good. > Any thoughts or is there something I can try/contribute? Best would be if you could provide a proper patch to fix this problem. Please see here: http://www.denx.de/wiki/view/U-Boot/Patches how this is done correctly. Best regards, Stefan ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office at denx.de =====================================================================