PMC551_DRAM_BLK0
pci_read_config_dword(dev, PMC551_DRAM_BLK0, &dram_data);
pci_write_config_dword(dev, PMC551_DRAM_BLK0, dram_data);
pci_read_config_dword(dev, PMC551_DRAM_BLK0, &dcmd);