AGP_I830_GCC1
gmch_ctl = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
pci_write_config(sc->bdev, AGP_I830_GCC1, gcc1, 2);
gcc1 = pci_read_config(bridge_dev, AGP_I830_GCC1, 1);
pci_read_config(sc->bdev, AGP_I830_GCC1, 1));
gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 1);