50   nodes. The device path is terminated by an end node that is length
70 // Template for an end-of-device path node.
86   specified by DevicePath including the end of device path node.
133   @retval FALSE       The length of any node in the DevicePath is less
137   @retval FALSE       If PcdMaximumDevicePathNodeCount is not zero, the node
158   // Validate the input size big enough to touch the first node.  in IsDevicePathValid()
176     // Validate next node before touch it.  in IsDevicePathValid()
191   // Only return TRUE when the End Device Path node is valid.  in IsDevicePathValid()
197   Returns the Type field of a device path node.
199   Returns the Type field of the device path node specified by Node.
201   If Node is NULL, then ASSERT().
203   @param  Node      A pointer to a device path node data structure.
205   @return The Type field of the device path node specified by Node.
211   IN CONST VOID  *Node  in DevicePathType()  argument
214   ASSERT (Node != NULL);  in DevicePathType()
215   return ((const EFI_DEVICE_PATH_PROTOCOL *)(Node))->Type;  in DevicePathType()
220   Returns the SubType field of a device path node.
222   Returns the SubType field of the device path node specified by Node.
224   If Node is NULL, then ASSERT().
226   @param  Node      A pointer to a device path node data structure.
228   @return The SubType field of the device path node specified by Node.
234   IN CONST VOID  *Node  in DevicePathSubType()  argument
237   ASSERT (Node != NULL);  in DevicePathSubType()
238   return ((const EFI_DEVICE_PATH_PROTOCOL *)(Node))->SubType;  in DevicePathSubType()
242   Returns the 16-bit Length field of a device path node.
244   Returns the 16-bit Length field of the device path node specified by Node.
245   Node is not required to be aligned on a 16-bit boundary, so it is recommended
249   If Node is NULL, then ASSERT().
251   @param  Node      A pointer to a device path node data structure.
253   @return The 16-bit Length field of the device path node specified by Node.
259   IN CONST VOID  *Node  in DevicePathNodeLength()  argument
262   ASSERT (Node != NULL);  in DevicePathNodeLength()
263   return ((const EFI_DEVICE_PATH_PROTOCOL *)Node)->Length[0] |  in DevicePathNodeLength()
264       (((const EFI_DEVICE_PATH_PROTOCOL *)Node)->Length[1] << 8);  in DevicePathNodeLength()
268   Returns a pointer to the next node in a device path.
270   Returns a pointer to the device path node that follows the device path node
271   specified by Node.
273   If Node is NULL, then ASSERT().
275   @param  Node      A pointer to a device path node data structure.
277   @return a pointer to the device path node that follows the device path node
278   specified by Node.
284   IN CONST VOID  *Node  in NextDevicePathNode()  argument
287   ASSERT (Node != NULL);  in NextDevicePathNode()
288   return ((EFI_DEVICE_PATH_PROTOCOL *)(__DECONST(UINT8 *, Node) + DevicePathNodeLength(Node)));  in NextDevicePathNode()
292   Determines if a device path node is an end node of a device path.
296   Determines if the device path node specified by Node is an end node of a device path.
298   end of an entire device path.  If Node represents an end node of a device path,
301   If Node is NULL, then ASSERT().
303   @param  Node      A pointer to a device path node data structure.
305   @retval TRUE      The device path node specified by Node is an end node of a
307   @retval FALSE     The device path node specified by Node is not an end node of
314   IN CONST VOID  *Node  in IsDevicePathEndType()  argument
317   ASSERT (Node != NULL);  in IsDevicePathEndType()
318   return (BOOLEAN) (DevicePathType (Node) == END_DEVICE_PATH_TYPE);  in IsDevicePathEndType()
322   Determines if a device path node is an end node of an entire device path.
324   Determines if a device path node specified by Node is an end node of an entire
325   device path. If Node represents the end of an entire device path, then TRUE is
328   If Node is NULL, then ASSERT().
330   @param  Node      A pointer to a device path node data structure.
332   @retval TRUE      The device path node specified by Node is the end of an entire
334   @retval FALSE     The device path node specified by Node is not the end of an
341   IN CONST VOID  *Node  in IsDevicePathEnd()  argument
344   ASSERT (Node != NULL);  in IsDevicePathEnd()
345 …return (BOOLEAN) (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_ENTIRE_DEVICE_PATH_…  in IsDevicePathEnd()
349   Fills in all the fields of a device path node that is the end of an entire device path.
351   Fills in all the fields of a device path node specified by Node so Node represents
352   the end of an entire device path.  The Type field of Node is set to
353   END_DEVICE_PATH_TYPE, the SubType field of Node is set to
354   END_ENTIRE_DEVICE_PATH_SUBTYPE, and the Length field of Node is set to
355   END_DEVICE_PATH_LENGTH.  Node is not required to be aligned on a 16-bit boundary,
359   If Node is NULL, then ASSERT().
361   @param  Node      A pointer to a device path node data structure.
367   OUT VOID  *Node  in SetDevicePathEndNode()  argument
370   ASSERT (Node != NULL);  in SetDevicePathEndNode()
371   memcpy (Node, &mUefiDevicePathLibEndDevicePath, sizeof (mUefiDevicePathLibEndDevicePath));  in SetDevicePathEndNode()
375   Sets the length, in bytes, of a device path node.
377   Sets the length of the device path node specified by Node to the value specified
378   by NodeLength.  NodeLength is returned.  Node is not required to be aligned on
382   If Node is NULL, then ASSERT().
386   @param  Node      A pointer to a device path node data structure.
387   @param  Length    The length, in bytes, of the device path node.
395   IN OUT VOID  *Node,  in SetDevicePathNodeLength()  argument
399   ASSERT (Node != NULL);  in SetDevicePathNodeLength()
401 //  return WriteUnaligned16 ((UINT16 *)&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0], (UINT16)(L…  in SetDevicePathNodeLength()
402   le16enc(&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0], (UINT16)(Length));  in SetDevicePathNodeLength()
407   Creates a device node.
409   This function creates a new device node in a newly allocated buffer of size
410   NodeLength and initializes the device path node header with NodeType and NodeSubType.
411   The new device path node is returned.
418   @param  NodeType                   The device node type for the new device node.
419   @param  NodeSubType                The device node sub-type for the new device node.
420   @param  NodeLength                 The length of the new device node.
496   device node from SecondDevicePath is retained. The newly created device path is
544   // Allocate space for the combined device path. It only has one end node of  in AppendDevicePath()
567   Creates a new path by appending the device node to the device path.
569   This function creates a new device path by appending a copy of the device node
571   in an allocated buffer. The end-of-device-path device node is moved after the
572   end of the appended device node.
575   path device node is returned.
577   device node is returned.
584   @param  DevicePathNode             A pointer to a single device path node.
588                     A copy of DevicePathNode followed by an end-of-device-path node
590                     A copy of an end-of-device-path node if both FirstDevicePath
610   // Build a Node that has a terminator on it  in AppendDevicePathNode()
620   // Add and end device path node to convert Node to device path  in AppendDevicePathNode()