SXIPIO_CFG
SXICMS4(sc, SXIPIO_CFG(port, pin), mask, mux << off);
SXICMS4(sc, SXIPIO_CFG(port, pin), 0x7 << off, mux << off);
reg = SXIREAD4(sc, SXIPIO_CFG(port, pin));