MDIO_CONTROL
val = PIF_RCSR(MDIO_CONTROL);
PIF_WCSR(MDIO_CONTROL, 0x0018040000000000ULL); DELAY(50);
PIF_WCSR(MDIO_CONTROL, 0x00180400000000e0ULL); DELAY(50);
PIF_WCSR(MDIO_CONTROL, 0x00180400000000ecULL); DELAY(50);
val = PIF_RCSR(MDIO_CONTROL);