1 files changed, 18 insertions, 0 deletions
diff --git a/MdePkg/Include/Library/PeiServicesTablePointerLib.h b/MdePkg/Include/Library/PeiServicesTablePointerLib.h
index 7a602f9041..f6ced47265 100644
--- a/MdePkg/Include/Library/PeiServicesTablePointerLib.h
+++ b/MdePkg/Include/Library/PeiServicesTablePointerLib.h
@@ -30,11 +30,29 @@ GetPeiServicesTablePointer (
   VOID
   );
 
+/**
+  The function set the pointer of PEI services immediately preceding the IDT table
+  according to PI specification.
+  
+  @param    PeiServices   The address of PeiServices pointer.
+**/
 VOID
 EFIAPI
 SetPeiServicesTablePointer (
   EFI_PEI_SERVICES ** PeiServicesTablePointer
   );
 
+/**
+  After memory initialization in PEI phase, the IDT table in temporary memory should 
+  be migrated to memory, and the address of PeiServicesPointer also need to be updated  
+  immediately preceding the new IDT table.
+  
+  @param    PeiServices   The address of PeiServices pointer.
+**/
+VOID
+MigrateIdtTable (
+  IN EFI_PEI_SERVICES  **PeiServices
+  );
+  
 #endif