We're working on bringing up a MPC5200B version of
our original MPC5200 board using U-Boot 1.1.4 configured for
Icecube/Lite5200B. Other than the CPU, the board is identical. The
bootloader crashes just after relocation to RAM, often with a Program
Check Exception, typically a memory corruption issue. I noticed
failures at different stages after relocation based on content,
suggesting problems with upper SDRAM. If I force the initram to 1/2
the determined size (64MB instead of 128MB), then everything works well
through kernel load and initialization. We've added termination
resistors to improve AD signals, to no avail. Memory tests work fine
too. Any help is appreciated.
Thanks,
Mark Lokowich
Systems Engineer
Advanced Communication Design
7901 12th Ave. So.
Bloomington, MN 55425
952-854-4000
lokowich@acdstar.com