Hi all,
I'm working on an AMCC PPC440EPx platform that is similar to the AMCC Sequoia under U-Boot 1.3.1. I've copied the Sequoia board and configuration as a starting point, but I've run into a problem with the size of the flash-based portion of U-Boot. I've added code to initdram() that results in the addition of 3-4 dozen assembly instructions. Now the board hangs after a very few tftp (or even ping) commands. However, if I remove the code I added, there's no problem with tftp, etc. I've narrowed it down to the point where I can make the difference between a working and non-working load by adding just a few instructions to initdram(). Some boundary or limit is being crossed somewhere...
I'm sure I've overrun something somewhere but I'm afraid I'm not literate enough in the magic of the .lds file (which is unmodified from the Sequoia platform) to understand what adding so few instructions to the flash-based portion of U-boot might have broken.
I've searched the FAQ and mailing list archives, all to no avail. Does anyone have any suggestions other that "write tighter code"? ;-)
Thanks, Dave