Dear brian,
in message AKELKEJDICNMBGAOOBLACEOOCHAA.bpadalino@perigee.com you wrote:
- Wolfgang: The address of the PC of the 440GP is 0x00000700 or
0x00001400, but that is in my DDR memory. I guess I am just missing what is really going on here.
Either you are trying to debug code _before_ relocation to RAM, then the exception vectors should still point to your boot image in flash; or you are trying to debug code _after_ relocation to RAM, in which case the exception vectors indeed point to RAM (as they should).
I can single step my way through the display_options functions, and it says it's trying to write out the serial port (of which it isnt quite connected yet so I can't quite verify that yet), but if i set a break point at display_options, and let the CPU continue, it will never return to me.
Argh... you don't have a serial port attached? So do this first. IIRC some 4xx ports even need HW handshake signals to allow any characters go out of the console port.
Am I not being patient enough? Does debugging just take a significantly longer time?
It depends on how often you do this. The first time is always a bit more difficult.
For a preemptive question, once I get U-Boot up and running, I had a linux kernel running on the Ebony dev kit -- do you experts forsee any porting that will have to be done with that over to the custom platform?
Yes, of course.
Best regards,
Wolfgang Denk