RING_ACTHD_UDW
acthd = ENGINE_READ64(engine, RING_ACTHD, RING_ACTHD_UDW);
{ RING_ACTHD_UDW(0), 0, 0, "ACTHD_UDW" }, \
MMIO_RING_DFH(RING_ACTHD_UDW, D_BDW_PLUS, 0,
reg = RING_ACTHD_UDW(engine->mmio_base);
MMIO_RING_D(RING_ACTHD_UDW);
{ RING_ACTHD_UDW(0), REG_64BIT_HI_DW, 0, 0, 0, "ACTHD"}, \