zpci_memcpy_toio
#define memcpy_toio(dst, src, count) zpci_memcpy_toio(dst, src, count)
zpci_memcpy_toio(to, from, count * 4);
zpci_memcpy_toio(to, from, count * 8);
rc = zpci_memcpy_toio(dst, src, count);
ret = zpci_memcpy_toio(io_addr, buf, length);