MC_ARB_DRAM_TIMING2_1
mc_arb_dram_timing2 = RREG32(MC_ARB_DRAM_TIMING2_1);
WREG32(MC_ARB_DRAM_TIMING2_1, mc_arb_dram_timing2);
mc_arb_dram_timing2 = RREG32(MC_ARB_DRAM_TIMING2_1);
WREG32(MC_ARB_DRAM_TIMING2_1, mc_arb_dram_timing2);
WREG32(MC_ARB_DRAM_TIMING2_1, dram_timing2);