diff options
Diffstat (limited to 'MdePkg/Include/Library/DevicePathLib.h')
| -rw-r--r-- | MdePkg/Include/Library/DevicePathLib.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/MdePkg/Include/Library/DevicePathLib.h b/MdePkg/Include/Library/DevicePathLib.h index 244e351400..8df025353b 100644 --- a/MdePkg/Include/Library/DevicePathLib.h +++ b/MdePkg/Include/Library/DevicePathLib.h @@ -15,6 +15,24 @@ #ifndef __DEVICE_PATH_LIB_H__
#define __DEVICE_PATH_LIB_H__
+#include <Library/BaseLib.h>
+
+#define END_DEVICE_PATH_LENGTH (sizeof (EFI_DEVICE_PATH_PROTOCOL))
+#define DevicePathNodeLength(Node) ReadUnaligned16 ((UINT16 *)&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0])
+#define NextDevicePathNode(Node) ((EFI_DEVICE_PATH_PROTOCOL *)((UINT8 *)(Node) + DevicePathNodeLength(Node)))
+#define DevicePathType(Node) (((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Type)
+#define DevicePathSubType(Node) (((EFI_DEVICE_PATH_PROTOCOL *)(Node))->SubType)
+#define IsDevicePathEndType(Node) (DevicePathType (Node) == END_DEVICE_PATH_TYPE)
+#define IsDevicePathEnd(Node) (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_ENTIRE_DEVICE_PATH_SUBTYPE)
+#define IsDevicePathEndInstance(Node) (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_INSTANCE_DEVICE_PATH_SUBTYPE)
+
+#define SetDevicePathNodeLength(Node,NodeLength) WriteUnaligned16 ((UINT16 *)&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0], (UINT16)(NodeLength))
+#define SetDevicePathEndNode(Node) { \
+ DevicePathType (Node) = END_DEVICE_PATH_TYPE; \
+ DevicePathSubType (Node) = END_ENTIRE_DEVICE_PATH_SUBTYPE; \
+ SetDevicePathNodeLength ((Node), END_DEVICE_PATH_LENGTH); \
+ }
+
/**
Returns the size of a device path in bytes.
|