51   nodes. The device path is terminated by an end node that is length
71 // Template for an end-of-device path node.
87   specified by DevicePath including the end of device path node.
134   @retval FALSE       The length of any node in the DevicePath is less
138   @retval FALSE       If PcdMaximumDevicePathNodeCount is not zero, the node
159   // Validate the input size big enough to touch the first node.  in IsDevicePathValid()
177     // Validate next node before touch it.  in IsDevicePathValid()
192   // Only return TRUE when the End Device Path node is valid.  in IsDevicePathValid()
198   Returns the Type field of a device path node.
200   Returns the Type field of the device path node specified by Node.
202   If Node is NULL, then ASSERT().
204   @param  Node      A pointer to a device path node data structure.
206   @return The Type field of the device path node specified by Node.
212   IN CONST VOID  *Node  in DevicePathType()  argument
215   ASSERT (Node != NULL);  in DevicePathType()
216   return ((const EFI_DEVICE_PATH_PROTOCOL *)(Node))->Type;  in DevicePathType()
221   Returns the SubType field of a device path node.
223   Returns the SubType field of the device path node specified by Node.
225   If Node is NULL, then ASSERT().
227   @param  Node      A pointer to a device path node data structure.
229   @return The SubType field of the device path node specified by Node.
235   IN CONST VOID  *Node  in DevicePathSubType()  argument
238   ASSERT (Node != NULL);  in DevicePathSubType()
239   return ((const EFI_DEVICE_PATH_PROTOCOL *)(Node))->SubType;  in DevicePathSubType()
243   Returns the 16-bit Length field of a device path node.
245   Returns the 16-bit Length field of the device path node specified by Node.
246   Node is not required to be aligned on a 16-bit boundary, so it is recommended
250   If Node is NULL, then ASSERT().
252   @param  Node      A pointer to a device path node data structure.
254   @return The 16-bit Length field of the device path node specified by Node.
260   IN CONST VOID  *Node  in DevicePathNodeLength()  argument
263   ASSERT (Node != NULL);  in DevicePathNodeLength()
264   return ((const EFI_DEVICE_PATH_PROTOCOL *)Node)->Length[0] |  in DevicePathNodeLength()
265       (((const EFI_DEVICE_PATH_PROTOCOL *)Node)->Length[1] << 8);  in DevicePathNodeLength()
269   Returns a pointer to the next node in a device path.
271   Returns a pointer to the device path node that follows the device path node
272   specified by Node.
274   If Node is NULL, then ASSERT().
276   @param  Node      A pointer to a device path node data structure.
278   @return a pointer to the device path node that follows the device path node
279   specified by Node.
285   IN CONST VOID  *Node  in NextDevicePathNode()  argument
288   ASSERT (Node != NULL);  in NextDevicePathNode()
289   return ((EFI_DEVICE_PATH_PROTOCOL *)(__DECONST(UINT8 *, Node) + DevicePathNodeLength(Node)));  in NextDevicePathNode()
293   Determines if a device path node is an end node of a device path.
297   Determines if the device path node specified by Node is an end node of a device path.
299   end of an entire device path.  If Node represents an end node of a device path,
302   If Node is NULL, then ASSERT().
304   @param  Node      A pointer to a device path node data structure.
306   @retval TRUE      The device path node specified by Node is an end node of a
308   @retval FALSE     The device path node specified by Node is not an end node of
315   IN CONST VOID  *Node  in IsDevicePathEndType()  argument
318   ASSERT (Node != NULL);  in IsDevicePathEndType()
319   return (BOOLEAN) (DevicePathType (Node) == END_DEVICE_PATH_TYPE);  in IsDevicePathEndType()
323   Determines if a device path node is an end node of an entire device path.
325   Determines if a device path node specified by Node is an end node of an entire
326   device path. If Node represents the end of an entire device path, then TRUE is
329   If Node is NULL, then ASSERT().
331   @param  Node      A pointer to a device path node data structure.
333   @retval TRUE      The device path node specified by Node is the end of an entire
335   @retval FALSE     The device path node specified by Node is not the end of an
342   IN CONST VOID  *Node  in IsDevicePathEnd()  argument
345   ASSERT (Node != NULL);  in IsDevicePathEnd()
346 …return (BOOLEAN) (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_ENTIRE_DEVICE_PATH_…  in IsDevicePathEnd()
350   Fills in all the fields of a device path node that is the end of an entire device path.
352   Fills in all the fields of a device path node specified by Node so Node represents
353   the end of an entire device path.  The Type field of Node is set to
354   END_DEVICE_PATH_TYPE, the SubType field of Node is set to
355   END_ENTIRE_DEVICE_PATH_SUBTYPE, and the Length field of Node is set to
356   END_DEVICE_PATH_LENGTH.  Node is not required to be aligned on a 16-bit boundary,
360   If Node is NULL, then ASSERT().
362   @param  Node      A pointer to a device path node data structure.
368   OUT VOID  *Node  in SetDevicePathEndNode()  argument
371   ASSERT (Node != NULL);  in SetDevicePathEndNode()
372   memcpy (Node, &mUefiDevicePathLibEndDevicePath, sizeof (mUefiDevicePathLibEndDevicePath));  in SetDevicePathEndNode()
376   Sets the length, in bytes, of a device path node.
378   Sets the length of the device path node specified by Node to the value specified
379   by NodeLength.  NodeLength is returned.  Node is not required to be aligned on
383   If Node is NULL, then ASSERT().
387   @param  Node      A pointer to a device path node data structure.
388   @param  Length    The length, in bytes, of the device path node.
396   IN OUT VOID  *Node,  in SetDevicePathNodeLength()  argument
400   ASSERT (Node != NULL);  in SetDevicePathNodeLength()
402 //  return WriteUnaligned16 ((UINT16 *)&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0], (UINT16)(L…  in SetDevicePathNodeLength()
403   le16enc(&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0], (UINT16)(Length));  in SetDevicePathNodeLength()
408   Creates a device node.
410   This function creates a new device node in a newly allocated buffer of size
411   NodeLength and initializes the device path node header with NodeType and NodeSubType.
412   The new device path node is returned.
419   @param  NodeType                   The device node type for the new device node.
420   @param  NodeSubType                The device node sub-type for the new device node.
421   @param  NodeLength                 The length of the new device node.
497   device node from SecondDevicePath is retained. The newly created device path is
545   // Allocate space for the combined device path. It only has one end node of  in AppendDevicePath()
568   Creates a new path by appending the device node to the device path.
570   This function creates a new device path by appending a copy of the device node
572   in an allocated buffer. The end-of-device-path device node is moved after the
573   end of the appended device node.
576   path device node is returned.
578   device node is returned.
585   @param  DevicePathNode             A pointer to a single device path node.
589                     A copy of DevicePathNode followed by an end-of-device-path node
591                     A copy of an end-of-device-path node if both FirstDevicePath
611   // Build a Node that has a terminator on it  in AppendDevicePathNode()
621   // Add and end device path node to convert Node to device path  in AppendDevicePathNode()