uboot sets up the trap handler (function trap_init called from lib_ppc/board.c). As soon this is called the processor seems to be getting an machine check exception/trap. (Refer to the logs below)

This also apparently causes processor to freeze, such that I am not able to read any CPU registers using JTAG etc

If we do not make calls to trap_init uboot cont. to work properly, but without fixing this issue we can not move ahead, as we need interrupt handling to work for the next stage.

I understand that may be this exception already accrued @ some point before trap_init call was done, but I am looking for ideas on how to debug it...

Vic

PS: Last message from uboot on console. ** pre trap_init() Machine Check Exception. Caused by (from msr): regs 0fed0a00 Instruction Synchronous Machine Check