On 7/24/07, Stefan Roese sr@denx.de wrote:
Hi Dale,
On Monday 23 July 2007, Dale Dunlea wrote:
I have 2 AMCC yucca boards, one Rev A silicon, and one Rev B silicon.
"ERROR: Cannot determine a common read delay for the DIMM(s) installed."
This happens on both the Rev A board, and the Rev B board. Oddly enough, on our own custom board which is very similar to the Yucca, it passes fine.
Has anyone ever seen this before?
Not exactly as you described. It is know though, that Yucca Rev A boards were having problems with the current common SPD DDR2 memory detection code. But just recently I fixed this Rev A issue in the u-boot-ppc4xx repository:
http://www.denx.de/cgi-bin/gitweb.cgi?p=u-boot/u-boot-ppc4xx.git;a=commit;h=...
So please download the current u-boot-ppc4xx repository and give it a try. And please let me know if it works on your Yucca's (Rev A and B) and your custom board.
Ah. When I tried the git head, I was pulling from the main u-boot repository, The 4xx branch does indeed fix my problem. It works on both the A and the B board. I can't comment on our custom board as it is currently on tour.
On a related note, I get machine check exceptions when I insert a PCIe card into the Rev A board. I have a work-around, but it's a bit messy, so I'll email you off-list about it.
Regards, Dale