tbtt             2472 dev/ic/atw.c   	uint32_t ival, past_even, tbtt, tsfth, tsftl;
tbtt             2503 dev/ic/atw.c   	tbtt = past_even + ival * 10;
tbtt             2508 dev/ic/atw.c   	    LSHIFT(MASK_AND_RSHIFT(tbtt - TBTTOFS * IEEE80211_DUR_TU,