VIA_APSIZE
pci_write_config_byte(agp_bridge->dev, VIA_APSIZE, previous_size->size_value);
pci_read_config_byte(agp_bridge->dev, VIA_APSIZE, &temp);
pci_write_config_byte(agp_bridge->dev, VIA_APSIZE,
pci_write_config_byte(agp_bridge->dev, VIA_APSIZE,