mpc8247 porting problem

Hello:
I'm porting linux 2.6.18 to a MPC8247 platform. 
now I encounter a strange situation. kernel enter a dead loop in __div64_32() which is called by time_init() in start_kernel().
I have modify the dtb file according the customer's board.
does anybody has any idea?

BR
2008-01-24 



chengk_thomson