DMA_GUC_WOPCM_OFFSET
u32 reg_base = intel_uncore_read(uncore, DMA_GUC_WOPCM_OFFSET);
err = intel_uncore_write_and_verify(uncore, DMA_GUC_WOPCM_OFFSET,
i915_mmio_reg_offset(DMA_GUC_WOPCM_OFFSET),
intel_uncore_read(uncore, DMA_GUC_WOPCM_OFFSET));
(intel_uncore_read(uncore, DMA_GUC_WOPCM_OFFSET) & GUC_WOPCM_OFFSET_VALID);