dma_addr_writeql
dma_addr_writeql(cmd_mbox_addr, base + DAC960_GEM_CMDMBX_OFFSET);
dma_addr_writeql(cmd_mbox_addr, base + DAC960_BA_CMDMBX_OFFSET);
dma_addr_writeql(cmd_mbox_addr, base + DAC960_LP_CMDMBX_OFFSET);