lokowich wrote:
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.
Review MPC5200B errata data sheets. I found a BDI2000 + RS232 console
port most useful for turning on a new design. Even
the exercise of BDI commands to tftp load/verify, memory write/verify,
debugging u-boot to run out of ram, with & w/o cache
turned on can be enlightening.
/*/Frank Bennett
President/*/
Mathegraphics,LLC
613 Bentley Pl
Fort Collins,CO 80526
www.mathegraphics.com <http://www.mathegraphics.com/>_
_
Thanks,
Mark Lokowich
Systems Engineer
Advanced Communication Design
7901 12th Ave. So.
Bloomington, MN 55425
952-854-4000
[EMAIL PROTECTED]
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