MC_ARB_DRAM_TIMING_1
mc_arb_dram_timing = RREG32(MC_ARB_DRAM_TIMING_1);
WREG32(MC_ARB_DRAM_TIMING_1, mc_arb_dram_timing);
mc_arb_dram_timing = RREG32(MC_ARB_DRAM_TIMING_1);
WREG32(MC_ARB_DRAM_TIMING_1, mc_arb_dram_timing);
WREG32(MC_ARB_DRAM_TIMING_1, dram_timing);