AR_INTR_ASYNC_MASK
mask = MS(OS_REG_READ(ah, AR_INTR_ASYNC_MASK),
OS_REG_RMW_FIELD(ah, AR_INTR_ASYNC_MASK,
mask = MS(OS_REG_READ(ah, AR_INTR_ASYNC_MASK),
OS_REG_RMW_FIELD(ah, AR_INTR_ASYNC_MASK,
OS_REG_WRITE(ah, AR_INTR_ASYNC_MASK, mask);