Hi
We have used u-boot-1.0 on our 8260 based boards with great success.
We are trying to bring up a new mpc8555 based board with u-boot-1.1.4 but have run into some problems.
We have a BDI probe which is used for programming flash and exercising hardware using JTAG.
Using the BDI probe and a fairly extensive config file (which sets up TLBs and LAWBARs) we are able to step through the programmed u-boot although it has an alignment exception whilst running cpu/mpc85xx/start.S (at the part after the comment "Allocate Initial RAM in data cache"). We think it's an alignment exception because it jumps to the alignment exception handler address and continues briefly.
The u-boot code is modified from the mpc8560ads code, the main difference being the boot flash is 32Mb and we have no localbus SDRAM.
I have a suspicion that we shouldn't be trying to single step this initialisation code after the BDI has set up the hardware somewhat. I have tried a reduced BDI config file and it still doesn't work, and it no longer single steps.
Any suggestions how to proceed would be appreciated, does the alignment exception after allocating RAM suggest anything to anyone?
Thanks
-Cam