Add PeiCore function declaration in PeiMain.h file.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2344 6f19259b-4bc3-4df7-8a09-765794883524

EdkModulePkg/Core/Pei/PeiMain.h

@@ -119,6 +119,38 @@ typedef union {
   VOID                         *Raw;
 } PEI_CORE_TEMP_POINTERS;
 
+
+//
+// PeiCore function
+//
+EFI_STATUS
+EFIAPI
+PeiCore (
+  IN EFI_PEI_STARTUP_DESCRIPTOR  *PeiStartupDescriptor,
+  IN VOID                        *Data
+  )
+/*++
+
+Routine Description:
+
+  The entry routine to Pei Core, invoked by PeiMain during transition
+  from SEC to PEI. After switching stack in the PEI core, it will restart
+  with the old core data.
+
+Arguments:
+
+  PeiStartupDescriptor - Information and services provided by SEC phase.
+  OldCoreData          - Pointer to old core data that is used to initialize the
+                         core's data areas.
+
+Returns:
+
+  This function never returns
+  EFI_NOT_FOUND        - Never reach
+
+--*/
+;
+
 //
 // Dispatcher support functions
 //