mmATC_L2_CACHE_2M_DSM_CNTL
WREG32_SOC15(GC, 0, mmATC_L2_CACHE_2M_DSM_CNTL, 0);
WREG32_SOC15(GC, 0, mmATC_L2_CACHE_2M_DSM_CNTL, 0);
data = RREG32_SOC15(GC, 0, mmATC_L2_CACHE_2M_DSM_CNTL);
WREG32_SOC15(GC, 0, mmATC_L2_CACHE_2M_DSM_CNTL, 0);
WREG32_SOC15(GC, 0, mmATC_L2_CACHE_2M_DSM_CNTL, 0);
RREG32_SOC15(GC, 0, mmATC_L2_CACHE_2M_DSM_CNTL);