+#include <Library/BaseLib.h>\r
+\r
+#define END_DEVICE_PATH_LENGTH (sizeof (EFI_DEVICE_PATH_PROTOCOL))\r
+\r
+/**\r
+ Macro that returns the Type field of a device path node.\r
+\r
+ Returns the Type field of the device path node specified by Node.\r
+\r
+ @param Node A pointer to a device path node data structure.\r
+\r
+ @return The Type field of the device path node specified by Node.\r
+\r
+**/\r
+#define DevicePathType(Node) (((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Type)\r
+\r
+/**\r
+ Macro that returns the SubType field of a device path node.\r
+\r
+ Returns the SubType field of the device path node specified by Node.\r
+\r
+ @param Node A pointer to a device path node data structure.\r
+\r
+ @return The SubType field of the device path node specified by Node.\r
+\r
+**/\r
+#define DevicePathSubType(Node) (((EFI_DEVICE_PATH_PROTOCOL *)(Node))->SubType)\r
+\r
+/**\r
+ Macro that returns the 16-bit Length field of a device path node.\r
+\r
+ Returns the 16-bit Length field of the device path node specified by Node.\r
+\r
+ @param Node A pointer to a device path node data structure.\r
+\r
+ @return The 16-bit Length field of the device path node specified by Node.\r
+\r
+**/\r
+#define DevicePathNodeLength(Node) ReadUnaligned16 ((UINT16 *)&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0])\r
+\r
+/**\r
+ Macro that returns a pointer to the next node in a device path.\r
+\r
+ Returns a pointer to the device path node that follows the device path node specified by Node.\r
+\r
+ @param Node A pointer to a device path node data structure.\r
+\r
+ @return a pointer to the device path node that follows the device path node specified by Node.\r
+\r
+**/\r
+#define NextDevicePathNode(Node) ((EFI_DEVICE_PATH_PROTOCOL *)((UINT8 *)(Node) + DevicePathNodeLength(Node)))\r
+\r
+/**\r
+ Macro that determines if a device path node is an end node of a device path.\r
+ This includes nodes that are the end of a device path instance and nodes that are the end of an entire device path.\r
+\r
+ Determines if the device path node specified by Node is an end node of a device path. \r
+ This includes nodes that are the end of a device path instance and nodes that are the \r
+ end of an entire device path. If Node represents an end node of a device path, \r
+ then TRUE is returned. Otherwise, FALSE is returned.\r
+\r
+ @param Node A pointer to a device path node data structure.\r
+\r
+ @retval TRUE The device path node specified by Node is an end node of a device path.\r
+ @retval FALSE The device path node specified by Node is not an end node of a device path.\r
+ \r
+**/\r
+#define IsDevicePathEndType(Node) ((DevicePathType (Node) & 0x7f) == END_DEVICE_PATH_TYPE)\r
+\r
+/**\r
+ Macro that determines if a device path node is an end node of an entire device path.\r
+\r
+ Determines if a device path node specified by Node is an end node of an entire device path.\r
+ If Node represents the end of an entire device path, then TRUE is returned. Otherwise, FALSE is returned.\r
+\r
+ @param Node A pointer to a device path node data structure.\r
+\r
+ @retval TRUE The device path node specified by Node is the end of an entire device path.\r
+ @retval FALSE The device path node specified by Node is not the end of an entire device path.\r
+\r
+**/\r
+#define IsDevicePathEnd(Node) (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_ENTIRE_DEVICE_PATH_SUBTYPE)\r
+\r
+/**\r
+ Macro that determines if a device path node is an end node of a device path instance.\r
+\r
+ Determines if a device path node specified by Node is an end node of a device path instance.\r
+ If Node represents the end of a device path instance, then TRUE is returned. Otherwise, FALSE is returned.\r
+\r
+ @param Node A pointer to a device path node data structure.\r
+\r
+ @retval TRUE The device path node specified by Node is the end of a device path instance.\r
+ @retval FALSE The device path node specified by Node is not the end of a device path instance.\r
+\r
+**/\r
+#define IsDevicePathEndInstance(Node) (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_INSTANCE_DEVICE_PATH_SUBTYPE)\r
+\r
+/**\r
+ Macro that sets the length, in bytes, of a device path node.\r
+\r
+ Sets the length of the device path node specified by Node to the value specified by Length. Length is returned.\r
+\r
+ @param Node A pointer to a device path node data structure.\r
+ @param Length The length, in bytes, of the device path node.\r
+\r
+ @return Length\r
+\r
+**/\r
+#define SetDevicePathNodeLength(Node,NodeLength) WriteUnaligned16 ((UINT16 *)&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0], (UINT16)(NodeLength))\r
+\r
+/**\r
+ Macro that fills in all the fields of a device path node that is the end of an entire device path.\r
+\r
+ Fills in all the fields of a device path node specified by Node so Node represents the end of an entire device path.\r
+\r
+ @param Node A pointer to a device path node data structure.\r
+\r
+**/\r
+#define SetDevicePathEndNode(Node) { \\r
+ DevicePathType (Node) = END_DEVICE_PATH_TYPE; \\r
+ DevicePathSubType (Node) = END_ENTIRE_DEVICE_PATH_SUBTYPE; \\r
+ SetDevicePathNodeLength ((Node), END_DEVICE_PATH_LENGTH); \\r
+ }\r
+\r