SEC_WRITE
SEC_WRITE(sc, SEC_CHAN_FF(channel), desc->sd_desc_paddr);
SEC_WRITE(sc, SEC_IER, 0);
SEC_WRITE(sc, SEC_ICR, 0xFFFFFFFFFFFFFFFFULL);
SEC_WRITE(sc, SEC_MCR, SEC_MCR_SWR);
SEC_WRITE(sc, SEC_CHAN_CCR(channel), reg | bit);
SEC_WRITE(sc, SEC_CHAN_CCR(channel), reg);
SEC_WRITE(sc, SEC_IER, reg);