[U-Boot] Problem with programming UPM

Hey

I had tried to program the UPM on my MPC8377 cpu.

When I run the upmconfig function in the /cpu/mpc83xx/cpu.c

And when I try to do the dummy write then the target is resetting.

*dummy = 0; /* Write the value to memory and increment MAD */

Why this happens, anyone had an idea?

/Lasse