d495dd131c
one 4 meg page can map both the kernel and the openfirmware mappings. Add the openfirmware mappings to the kernel tsb so we can call the firmware on the kernel trap table and access kernel memory normally. Implement pmap_swapout_proc, pmap_swapin_proc, pmap_swapout_thread, pmap_swapin_thread, pmap_activate, pmap_page_exists, and pmap_phys_address.