D_CHCR_REG
bus_addr_t chcr = D_CHCR_REG(__dmac_channel_base[ch]);
bus_addr_t chcr = D_CHCR_REG(__dmac_channel_base[ch]);
bus_addr_t chcr = D_CHCR_REG(__dmac_channel_base[ch]);
_reg_write_4(D_CHCR_REG(__dmac_channel_base[ch]), v);