CXL_HDM_DECODER0_BASE_LOW_OFFSET
writel(lower_32_bits(base), hdm + CXL_HDM_DECODER0_BASE_LOW_OFFSET(id));
writel(0, hdm + CXL_HDM_DECODER0_BASE_LOW_OFFSET(id));
lo = readl(hdm + CXL_HDM_DECODER0_BASE_LOW_OFFSET(which));