NvRegMacAddrB
temp2 = readl(base + NvRegMacAddrB);
writel(temp2, base + NvRegMacAddrB);
writel(mac[1], base + NvRegMacAddrB);
np->orig_mac[1] = readl(base + NvRegMacAddrB);
writel(np->orig_mac[1], base + NvRegMacAddrB);