RS690_HTIU_NB_DATA
pci_read_config_dword(pdev, RS690_HTIU_NB_DATA, &val);
pci_write_config_dword(pdev, RS690_HTIU_NB_DATA, top_of_dram >> 32);
pci_write_config_dword(pdev, RS690_HTIU_NB_DATA,