Calling function from address

Hi! Is it possible to call a function that is somewere in the physical-address space? So I'd like to jump to a certain physical address, execute the code there and then return to my kernel module. I already tried to ioremap that address and cast the new address to a funtion pointer and then call the function, but there where some page faults. Regards #micha -- /* To err is human; to really fuck things up requires the root password */