From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andre Schwarz Date: Tue, 02 Nov 2010 10:55:39 +0100 Subject: [U-Boot] 36-bit u-boot In-Reply-To: References: Message-ID: <4CCFE01B.6080304@matrix-vision.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Leif, > I have managed to flashed a 36-bits u-boot to my p4080 board. > > I have put in two 4Gb dimm into the board but it doesn't work. > > I got the following from u-boot. > > [snip] > DRAM: Initializing.... > > Error: DDR_SDRAM_CFG[RD_EN] and DDR_SDRAM_CFG[2T_EN] should not be set at the same time. > "RD_EN" means "registered DIMM enable" which is read from PROM on memory module. Looks like you have CONFIG_DDR_2T_TIMING defined in your board header ... which is mutually exclusive with registered DIMM usage. 2T timing is only useful if you have AC timing violations regarding setup/hold on Addr/Cmd Bus. > Error: DDR_SDRAM_CFG[RD_EN] and DDR_SDRAM_CFG[2T_EN] should not be set at the same time. > > 6144M left unmapped > > DDR: 8 GB > > """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" > > It seams that it is something wrong with the DDR initiation. > no. You can either use unregistered DIMM modules or simply undefine CONFIG_DDR_2T_TIMING. Cheers, Andr? MATRIX VISION GmbH, Talstrasse 16, DE-71570 Oppenweiler Registergericht: Amtsgericht Stuttgart, HRB 271090 Geschaeftsfuehrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner