SCA_DMAC_OFF_0
sca_write_1(sc, SCA_DSR0 + SCA_DMAC_OFF_0, 0);
sca_write_1(sc, SCA_DCR0 + SCA_DMAC_OFF_0, SCA_DCR_ABRT);
sca_write_1(sc, SCA_DSR1 + SCA_DMAC_OFF_0, 0);
sca_write_1(sc, SCA_DCR1 + SCA_DMAC_OFF_0, SCA_DCR_ABRT);
scp->dmac_off = SCA_DMAC_OFF_0;