mmMC_SHARED_BLACKOUT_CNTL
blackout = RREG32(mmMC_SHARED_BLACKOUT_CNTL);
WREG32(mmMC_SHARED_BLACKOUT_CNTL, blackout | 1);
tmp = RREG32(mmMC_SHARED_BLACKOUT_CNTL);
WREG32(mmMC_SHARED_BLACKOUT_CNTL, tmp);
WREG32(mmMC_SHARED_BLACKOUT_CNTL, blackout | 1);
tmp = RREG32(mmMC_SHARED_BLACKOUT_CNTL);
WREG32(mmMC_SHARED_BLACKOUT_CNTL, tmp);
blackout = RREG32(mmMC_SHARED_BLACKOUT_CNTL);
blackout = RREG32(mmMC_SHARED_BLACKOUT_CNTL);
WREG32(mmMC_SHARED_BLACKOUT_CNTL, blackout);
tmp = RREG32(mmMC_SHARED_BLACKOUT_CNTL);
WREG32(mmMC_SHARED_BLACKOUT_CNTL, tmp);