[U-Boot-Users] Re: Usually dram test executed not on whole sdram

Wolfgang Denk wd at denx.de
Wed May 10 21:59:25 CEST 2006

In message <20060510134646.18278.qmail at mx1.aruba.it> you wrote:
> I disabled burst mode in ORx register of MPC880 and everything is fine.
> The UPM table has to be double checked. 

I repeat: please READ the FAQ! The UPM table  is  just  half  of  the
story, and often NOT the culprit.

> Now I want to look for a dram test that exercise the burst mode. It could be
> really useful in debugging these problems. 

See examples/test_burst.* - but don't expect that it will  be  usable
out  of  the  box,  or without a *deep* understanding of the relevant
technical details.

It is much easier and more straightforward  just  to  read  the  chip
manufacturer's manual for your RAM chips and implement the documented
init sequence to the letter.

This is a RTFAQ and RTFM job.

Best regards,

Wolfgang Denk

Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Hacking's just another word for nothing left to kludge.

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