MC_ARB_DRAM_TIMING2_3
mc_arb_dram_timing2 = RREG32(MC_ARB_DRAM_TIMING2_3);
WREG32(MC_ARB_DRAM_TIMING2_3, mc_arb_dram_timing2);
mc_arb_dram_timing2 = RREG32(MC_ARB_DRAM_TIMING2_3);
WREG32(MC_ARB_DRAM_TIMING2_3, mc_arb_dram_timing2);
WREG32(MC_ARB_DRAM_TIMING2_3, dram_timing2);