mmDMA_QM_4_CQ_IFIFO_CNT
pb_addr = (mmDMA_QM_4_CQ_IFIFO_CNT & ~0xFFF) + PROT_BITS_OFFS;
word_offset = ((mmDMA_QM_4_CQ_IFIFO_CNT & PROT_BITS_OFFS) >> 7) << 2;
mask = 1 << ((mmDMA_QM_4_CQ_IFIFO_CNT & 0x7F) >> 2);