E1000_SWSM_SWESMBI
swsm |= E1000_SWSM_SWESMBI;
if (swsm & E1000_SWSM_SWESMBI)
swsm &= ~(E1000_SWSM_SMBI | E1000_SWSM_SWESMBI);
swsm &= ~(E1000_SWSM_SWESMBI);