Hi, Considering the age of the U-Boot version you're using, it's most likely the problem with the SD-RAM controller of the 5200B. Later U-Boot versions fix this I think by writing a value of 4 to the register at MBAR+0x0190, which does _something_ to resolve the problem. It worked for us. However, we still had problems with SD-RAM in conjunction with other components, so we switched to DDR which has worked flawlessly so far - you might want to consider doing the same.
Greets, Florian Voegel Carangul.Tech On Fri, 20 Jul 2007 10:40:30 -0500 lokowich <[EMAIL PROTECTED]> 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. > > Thanks, > Mark Lokowich > Systems Engineer > Advanced Communication Design > 7901 12th Ave. So. > Bloomington, MN 55425 > 952-854-4000 > [EMAIL PROTECTED] > > This email was Anti Virus checked by Astaro Security Gateway. > http://www.astaro.com > > _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
