TSF_TO_TU
hw_tu = TSF_TO_TU(tsf);
u32 tsftu = TSF_TO_TU(tsf);
bc_tu = TSF_TO_TU(bc_tsf);
hw_tu = TSF_TO_TU(hw_tsf);
TSF_TO_TU(tsf),
(unsigned long long)tsf, TSF_TO_TU(tsf));
tsftu = TSF_TO_TU((tsf * ATH_BCBUF) >>32, tsf * ATH_BCBUF);
tsftu = TSF_TO_TU(tsf >> 32, tsf);