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.
Thanks all, Robert