Added SecDispatchTable library to allow custom PPIs to be passed up to into PEI Core. This will allow platform specific libraries to do thinks like map hardware devices directly into the emulator.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10882 6f19259b-4bc3-4df7-8a09-765794883524

UnixPkg/Library/SecDispatchTableLib/SecDispatchTableLib.c

@@ -0,0 +1,36 @@
+/** @file
+  Allows an override of the SEC SEC PPI Dispatch Table. This allows 
+  customized PPIs to be passed into the PEI Core.
+
+Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
+This program and the accompanying materials                          
+are licensed and made available under the terms and conditions of the BSD License         
+which accompanies this distribution.  The full text of the license may be found at        
+http://opensource.org/licenses/bsd-license.php                                            
+                                                                                          
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
+
+--*/
+
+#include <PiPei.h>
+
+/**
+  Allow an override of the Sec PPI Dispatch Table. This table contains PPIs passed
+  up from SEC to PEI. This function is responcible for allocating space for the 
+  overridden table.
+
+
+  @param  OriginalTable  SECs default PPI dispatch table
+
+  @return OriginalTable or override of the table
+
+**/
+EFI_PEI_PPI_DESCRIPTOR *
+EFIAPI
+OverrideDispatchTable (
+  IN CONST EFI_PEI_PPI_DESCRIPTOR          *OriginalTable
+  )
+{
+  return (EFI_PEI_PPI_DESCRIPTOR *)OriginalTable;
+}