1 files changed, 47 insertions, 0 deletions
diff --git a/MdeModulePkg/Include/Guid/DelayedDispatch.h b/MdeModulePkg/Include/Guid/DelayedDispatch.h
new file mode 100644
index 0000000..9be5444
--- /dev/null
+++ b/MdeModulePkg/Include/Guid/DelayedDispatch.h
@@ -0,0 +1,47 @@
+/** @file
+  Definition for structure & defines exported by Delayed Dispatch PPI
+
+  Copyright (c), Microsoft Corporation.
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef DELAYED_DISPATCH_H_
+#define DELAYED_DISPATCH_H_
+
+// Delayed Dispatch table GUID
+#define EFI_DELAYED_DISPATCH_TABLE_GUID  {\
+  0x4b733449, 0x8eff, 0x488c, { 0x92, 0x1a, 0x15, 0x4a, 0xda, 0x25, 0x18, 0x07 } \
+  }
+
+//
+// Maximal number of Delayed Dispatch entries supported
+//
+#define DELAYED_DISPATCH_MAX_ENTRIES  8
+
+//
+// Internal structure for delayed dispatch entries.
+// Packing the structures here to save space as they will be stored as HOBs.
+//
+#pragma pack (push, 1)
+
+typedef struct {
+  EFI_GUID                         DelayedGroupId;
+  UINT64                           Context;
+  EFI_DELAYED_DISPATCH_FUNCTION    Function;
+  UINT64                           DispatchTime;
+  UINT32                           MicrosecondDelay;
+} DELAYED_DISPATCH_ENTRY;
+
+typedef struct {
+  UINT32                    Count;
+  UINT32                    DispCount;
+  DELAYED_DISPATCH_ENTRY    Entry[DELAYED_DISPATCH_MAX_ENTRIES];
+} DELAYED_DISPATCH_TABLE;
+
+#pragma pack (pop)
+
+extern EFI_GUID  gEfiDelayedDispatchTableGuid;
+
+#endif