[U-Boot-Users] 85xx running in RAM problems

[David Hawkins <dwh@ovro.caltech.edu>]

robert lazarski wrote:
> On 10/18/07, David Hawkins <dwh@ovro.caltech.edu> wrote:
>> Hi Robert,
>>
>>> On my custom 8548 board I'm getting two different results - with a BDI
>>> [INIT] config, and without. With the BDI [INIT] config, I can get
>>> farther by setting the DDR2 ram size to be 256MB instead of what I
>>> have, 1GB. I have no other SDRAM besides DDR2.
>>
>> Unless you can guarantee your RAM is working fine, there's
>> no point in trying to get code to run.
>>
> 
> I figured this out - we got the different behavior via BDI [INIT] from
> the TIMING_CFG_n params leftover from CDS. The values detected from
> SPD weren't working at all on the first batch of memory chips we
> tried. In fact, we moved to higher quality Kingston DDR2 and SPD
> started working and we got the u-boot prompt! I nearly hit the ceiling
> ;-) . I ran mtest in u-boot and after running all day, it passed.
> 

Glad to hear it!
Cheers,
Dave