board hangs during reboot

[Eran Ben-Avi]

Hi,

When I tried to restart the board (using reboot command), after all
services being shut down
the board hangs .The last printed line is "Restarting system." .
I implemented the restart api as follows:

            u32 jumpaddr=0xfff00100;
        u32 defaultmsr=MSR_IP;

        _disable_interrupts();

        __asm__ __volatile__("\n\
        mtspr   26, %1  /* SRR0 */
        mtspr   27, %0  /* SRR1 */
        rfi"
        :
        : "r" (defaultmsr), "r" (jumpaddr));
        
            /*
         * Not reached
         */


I'm using IBM750Gl cpu .

Does anyone familiar with this ?

Regards,

Eran.