+/* PCI device classes */
+
+#define PCI_CLASS_PRE_20 0x00
+#define PCI_CLASS_MASS_STORAGE_CTLR 0x01
+#define PCI_CLASS_NETWORK_CTLR 0x02
+#define PCI_CLASS_DISPLAY_CTLR 0x03
+#define PCI_CLASS_MULTIMEDIA_DEV 0x04
+#define PCI_CLASS_MEMORY_CTLR 0x05
+#define PCI_CLASS_BRIDGE_DEV 0x06
+#define PCI_CLASS_SIMPLE_COMMS_CTLR 0x07
+#define PCI_CLASS_BASE_SYSTEM_DEV 0x08
+#define PCI_CLASS_INPUT_DEV 0x09
+#define PCI_CLASS_DOCKING_STATION 0x0a
+#define PCI_CLASS_PROCESSOR 0x0b
+#define PCI_CLASS_SERIAL_BUS_CTLR 0x0c
+
+
+/* PCI device subclasses for class 1 (mass storage controllers)*/
+
+#define PCI_SUBCLASS_MSC_SCSI_BUS_CTLR 0x00
+#define PCI_SUBCLASS_MSC_IDE_CTLR 0x01
+#define PCI_SUBCLASS_MSC_FLOPPY_CTLR 0x02
+#define PCI_SUBCLASS_MSC_IPI_CTLR 0x03
+#define PCI_SUBCLASS_MSC_RAID_CTLR 0x04
+#define PCI_SUBCLASS_MSC_OTHER 0x80
+
+