Stefan,
I look more into using both dimms issue and I see two interesting things.
1. With two dimms it never get pass line 1478 - 1500 in spd_sdram.c. It loops once then hangs.
2. If I disable this part (ie break) I get the ERROR: Cannot determine a common read delay. If I comment out the hang() It returns but it only calculated 768MB of memory.
Any sugguests?
Gerald
-----Original Message----- From: Stefan Roese [mailto:sr@denx.de] Sent: Sunday, October 01, 2006 5:23 AM To: u-boot-users@lists.sourceforge.net Cc: Gerald Jackson; Marc.Howard@kla-tencor.com Subject: Re: [U-Boot-Users] (no subject)
Hi Gerald,
On Sunday 01 October 2006 05:04, Gerald Jackson wrote:
I made the change that Marc suggested and still no luck. If both dimms are in use the system hangs
Hangs where? Also upon SDRAM initialization?
and if only the second Dimm slot is in use I get:
U-Boot 1.1.4 (Sep 30 2006 - 10:08:43)
CPU: AMCC PowerPC 440GX Rev. F at 800 MHz (PLB=160, OPB=80, EBC=40 MHz) I2C boot EEPROM enabled Internal PCI arbiter enabled 32 kB I-Cache 32 kB D-Cache Board: Ocotea - AMCC PPC440GX Evaluation Board I2C: ready DRAM: ERROR: Cannot determine a common read delay. ### ERROR ### Please RESET the board ###
Any Ideals?
Ideals? Not really. But I have an idea! ;-)
How did you get the Board? Directly from AMCC? Did it never work at all?
Your PLB frequency seems strange to me (160MHz). Please try to configure your Ocotea to use a different setup, for example 533MHz CPU and 133MHz PLB. Here is the output from our Ocotea:
U-Boot 1.1.4-g887e2ec9-dirty (Sep 7 2006 - 11:55:16)
CPU: AMCC PowerPC 440GX Rev. F at 533.333 MHz (PLB=133, OPB=66, EBC=66 MHz) I2C boot EEPROM enabled Bootstrap Option F - Boot ROM Location I2C (Addr 0x54) Internal PCI arbiter enabled 32 kB I-Cache 32 kB D-Cache Board: Ocotea - AMCC PPC440GX Evaluation Board I2C: ready DRAM: 256 MB FLASH: 5 MB PCI: Bus Dev VenId DevId Class Int 00 01 8086 107c 0200 00 In: serial Out: serial Err: serial Net: ppc_4xx_eth0, ppc_4xx_eth1, ppc_4xx_eth2, ppc_4xx_eth3
Type "run flash_nfs" to mount root filesystem over NFS
Hit any key to stop autoboot: 0 =>
Best regards, Stefan