[U-Boot-Users] Software emulation exception on entry into RAM

Wolfgang Denk wd at denx.de
Sat Jul 31 14:34:37 CEST 2004

In message <410B8AD2.9050306 at rochester.rr.com> you wrote:
> >And which data are you RADING from SDRAM? 
> >
> The data that was copied prior to the branch to SDRAM.

Then you should be able to single-step the code in the debugger.

> >You wrote you are using a BDI2000 - you can use  it  to  single  step
> >into  the  code  in  SDRAM.  What  does  this give? And if you get an
> >exception - where does it happen? What was the incorrect data?
> >
> I get an exception on the first access of SDRAM (the address branched to 

Even when single stepping? What sort of exception, btw?

> I have checked the SDRAM initialization and it appears to be correct. 
> With the logic analyzer, I will check out the burst read cycle.

Good luck!

Best regards,

Wolfgang Denk

Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
It is your destiny.                                     - Darth Vader

More information about the U-Boot mailing list