DCR_SDR0_AHB_CFG
v = mfsdr(DCR_SDR0_AHB_CFG);
mtsdr(DCR_SDR0_AHB_CFG, v);
uint32_t ahbcfg = mfsdr(DCR_SDR0_AHB_CFG);
mtsdr(DCR_SDR0_AHB_CFG, ahbcfg);
mfsdr(DCR_SDR0_AHB_CFG));
reg = mfsdr(DCR_SDR0_AHB_CFG); /* errata is lost across the reset */
mtsdr(DCR_SDR0_AHB_CFG,