1 files changed, 60 insertions, 2 deletions
diff --git a/MdePkg/Include/Protocol/DevicePath.h b/MdePkg/Include/Protocol/DevicePath.h
index 7b9a4e5520..a3d6d96bde 100644
--- a/MdePkg/Include/Protocol/DevicePath.h
+++ b/MdePkg/Include/Protocol/DevicePath.h
@@ -21,6 +21,8 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
 #include <Guid/PcAnsi.h>
 #include <IndustryStandard/Bluetooth.h>
+#include <IndustryStandard/Acpi60.h>
+
 ///
 /// Device Path protocol.
 ///
@@ -1076,6 +1078,62 @@ typedef struct {
 } MEDIA_RELATIVE_OFFSET_RANGE_DEVICE_PATH;
 
 ///
+/// This GUID defines a RAM Disk supporting a raw disk format in volatile memory.
+///
+#define EFI_VIRTUAL_DISK_GUID               EFI_ACPI_6_0_NFIT_GUID_RAM_DISK_SUPPORTING_VIRTUAL_DISK_REGION_VOLATILE
+
+extern  EFI_GUID                            gEfiVirtualDiskGuid;
+
+///
+/// This GUID defines a RAM Disk supporting an ISO image in volatile memory.
+///
+#define EFI_VIRTUAL_CD_GUID                 EFI_ACPI_6_0_NFIT_GUID_RAM_DISK_SUPPORTING_VIRTUAL_CD_REGION_VOLATILE
+
+extern  EFI_GUID                            gEfiVirtualCdGuid;
+
+///
+/// This GUID defines a RAM Disk supporting a raw disk format in persistent memory.
+///
+#define EFI_PERSISTENT_VIRTUAL_DISK_GUID    EFI_ACPI_6_0_NFIT_GUID_RAM_DISK_SUPPORTING_VIRTUAL_DISK_REGION_PERSISTENT
+
+extern  EFI_GUID                            gEfiPersistentVirtualDiskGuid;
+
+///
+/// This GUID defines a RAM Disk supporting an ISO image in persistent memory.
+///
+#define EFI_PERSISTENT_VIRTUAL_CD_GUID      EFI_ACPI_6_0_NFIT_GUID_RAM_DISK_SUPPORTING_VIRTUAL_CD_REGION_PERSISTENT
+
+extern  EFI_GUID                            gEfiPersistentVirtualCdGuid;
+
+///
+/// Media ram disk device path.
+///
+#define MEDIA_RAM_DISK_DP         0x09
+
+///
+/// Used to describe the ram disk device path.
+///
+typedef struct {
+  EFI_DEVICE_PATH_PROTOCOL        Header;
+  ///
+  /// Starting Memory Address.
+  ///
+  UINT32                          StartingAddr[2];
+  ///
+  /// Ending Memory Address.
+  ///
+  UINT32                          EndingAddr[2];
+  ///
+  /// GUID that defines the type of the RAM Disk.
+  ///
+  EFI_GUID                        TypeGuid;
+  ///
+  /// RAM Diskinstance number, if supported. The default value is zero.
+  ///
+  UINT16                          Instance;
+} MEDIA_RAM_DISK_DEVICE_PATH;
+
+///
 /// BIOS Boot Specification Device Path.
 ///
 #define BBS_DEVICE_PATH           0x05
@@ -1169,7 +1227,7 @@ typedef union {
   MEDIA_FW_VOL_DEVICE_PATH                   FirmwareVolume;
   MEDIA_FW_VOL_FILEPATH_DEVICE_PATH          FirmwareFile;
   MEDIA_RELATIVE_OFFSET_RANGE_DEVICE_PATH    Offset;
-
+  MEDIA_RAM_DISK_DEVICE_PATH                 RamDisk;
   BBS_BBS_DEVICE_PATH                        Bbs;
 } EFI_DEV_PATH;
 
@@ -1224,7 +1282,7 @@ typedef union {
   MEDIA_FW_VOL_DEVICE_PATH                   *FirmwareVolume;
   MEDIA_FW_VOL_FILEPATH_DEVICE_PATH          *FirmwareFile;
   MEDIA_RELATIVE_OFFSET_RANGE_DEVICE_PATH    *Offset;
-
+  MEDIA_RAM_DISK_DEVICE_PATH                 *RamDisk;
   BBS_BBS_DEVICE_PATH                        *Bbs;
   UINT8                                      *Raw;
 } EFI_DEV_PATH_PTR;