From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Roese Date: Sat, 2 Dec 2006 13:02:07 +0100 (MET) Subject: [U-Boot-Users] ERROR: Cannot determine a common read delay In-Reply-To: References: Message-ID: <200612021302.19069.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 30 November 2006 22:14, k b wrote: > I'm using a board similar to ecotea > here's the initial prompt. > So initailly it had 256 mb ddr sdram. now i want to use 512 ddr sdram. > i put that part in and now i get this error. So to sum up, 256MB i working (U-Boot get's to the prompt) and 512MB is not working. Right? > the error is generated in program_tr1() in cpu/ppc4xxx/spd_sdram.c > here are some questions > 1) what exactly is this program tr doing. i guess cp No. It's doing a simple memory test do determine a common TR1 value for all installed memory bank's. Please see the 440GX users manual for more details. > 2) Can someone gimme any pointers as to what's that problem here. Not easy to say. Could be a hardware problem. Could be still a bug in the 440 SPD-DDR setup routine. Did you try a module from another vendor? > 3) why isn't program_tr0 used at all ? It seems to be used for me. Please look again. Best regards, Stefan