pmap_early_io_map
ptr = (void *)pmap_early_io_map(arg1, PAGE_SIZE);
ptr = (void *)pmap_early_io_map(arg1, fdt_size);
vm_offset_t pmap_early_io_map(vm_paddr_t pa, vm_size_t size);
ccsrbar_va = pmap_early_io_map(ccsrbar, ccsrsize);
tmp_fdt_ptr = pmap_early_io_map((vm_paddr_t)fdt, PAGE_SIZE);
pmap_early_io_map(addr, size);
kernelimg = (u_char *)pmap_early_io_map(start, PAGE_SIZE);
kernelimg = (u_char *)pmap_early_io_map(start, (end - start));