From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <200203270931.RAA09753@isdn.iscas.ac.cn> Date: Wed, 27 Mar 2002 17:37:24 +0800 From: weiwu To: "linuxppc-embedded@lists.linuxppc.org" Subject: UPM works for 16MB PC SDRAM but fails for 32MB memory Mime-Version: 1.0 Content-Type: text/plain; charset="GB2312" Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: I have bootrom code (ppcboot) for which I have UPM values with which I can access the 16MB PC SDRAM okay but for 32MB memory my bootrom fails to execute out of RAM. software: Now I have modifyed the AMA and MAMR registers,but it still not work! Hardware: My board uses HY57V281620A SDRAM and it's configuration is 4 Banks x 2M x 16bits, 12 rows and 9 column. MPC SDRAM ========= A29 A0 A28 A1 A27 A2 A26 A3 A25 A4 A24 A5 A23 A6 A22 A7 A21 A8 A20 A9 GPL_A0 A10 A18 A11 A7 BA0 A8 BA1 OE_GPL_A1 RAS GPL_A2 CAS GPL_A3 WE What do I have to do get 32MB memory going? Thanks! ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/