[U-Boot-Users] (no subject)

[Gerald Jackson]

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 at denx.de] 
Sent: Sunday, October 01, 2006 5:23 AM
To: u-boot-users at lists.sourceforge.net
Cc: Gerald Jackson; Marc.Howard at 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