memory_region_set_readonly(bios,true);memory_region_add_subregion(address_space_mem,0, ram);/* Map the BIOS / boot exception handler. */memory_region_add_subregion(address_space_mem,0x1fc00000LL, bios);/* Load a BIOS / boot exception handler image. */if(bios_name ==NULL) bios_nam...