PMC551_DRAM_BLK2
pci_read_config_dword(dev, PMC551_DRAM_BLK2, &dram_data);
pci_write_config_dword(dev, PMC551_DRAM_BLK2, dram_data);
pci_read_config_dword(dev, PMC551_DRAM_BLK2, &dcmd);