OVMF SEC: Modify to match new interface of reset vector module

Previously the interface to the SEC module was:
  ESI/RSI - SEC Core entry point
  EDI/RDI - PEI Core entry point
  EBP/RBP - Start of BFV

Now it is:
  RAX/EAX  Initial value of the EAX register
           (BIST: Built-in Self Test)
  DI       'BP': boot-strap processor, or
           'AP': application processor
  RBP/EBP  Address of Boot Firmware Volume (BFV)

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9572 6f19259b-4bc3-4df7-8a09-765794883524

OvmfPkg/Sec/FindPeiCore.c

@@ -0,0 +1,103 @@
+/** @file
+  Locate the entry point for the PEI Core
+
+  Copyright (c) 2008 - 2009, Intel Corporation
+
+  All rights reserved. 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>
+#include <Library/BaseLib.h>
+#include <Library/PeCoffGetEntryPointLib.h>
+
+#include "SecMain.h"
+
+
+VOID
+EFIAPI
+FindPeiCoreEntryPoint (
+  IN  EFI_FIRMWARE_VOLUME_HEADER       *BootFirmwareVolumePtr,
+  OUT VOID                             **PeiCoreEntryPoint
+  )
+{
+  EFI_STATUS                  Status;
+  EFI_PHYSICAL_ADDRESS        CurrentAddress;
+  EFI_PHYSICAL_ADDRESS        EndOfFirmwareVolume;
+  EFI_FFS_FILE_HEADER         *File;
+  UINT32                      Size;
+  EFI_PHYSICAL_ADDRESS        EndOfFile;
+  EFI_COMMON_SECTION_HEADER   *Section;
+  EFI_PHYSICAL_ADDRESS        EndOfSection;
+
+  *PeiCoreEntryPoint = NULL;
+
+  CurrentAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) BootFirmwareVolumePtr;
+  EndOfFirmwareVolume = CurrentAddress + BootFirmwareVolumePtr->FvLength;
+
+  //
+  // Loop through the FFS files in the Boot Firmware Volume
+  //
+  for (EndOfFile = CurrentAddress + BootFirmwareVolumePtr->HeaderLength; ; ) {
+
+    CurrentAddress = (EndOfFile + 7) & 0xfffffffffffffff8ULL;
+    if (CurrentAddress > EndOfFirmwareVolume) {
+      return;
+    }
+
+    File = (EFI_FFS_FILE_HEADER*)(UINTN) CurrentAddress;
+    Size = *(UINT32*) File->Size & 0xffffff;
+    if (Size < (sizeof (*File) + sizeof (*Section))) {
+      return;
+    }
+
+    EndOfFile = CurrentAddress + Size;
+    if (EndOfFile > EndOfFirmwareVolume) {
+      return;
+    }
+
+    //
+    // Look for PEI Core files
+    //
+    if (File->Type != EFI_FV_FILETYPE_PEI_CORE) {
+      continue;
+    }
+
+    //
+    // Loop through the FFS file sections within the PEI Core FFS file
+    //
+    EndOfSection = (EFI_PHYSICAL_ADDRESS)(UINTN) (File + 1);
+    for (;;) {
+      CurrentAddress = (EndOfSection + 3) & 0xfffffffffffffffcULL;
+      Section = (EFI_COMMON_SECTION_HEADER*)(UINTN) CurrentAddress;
+
+      Size = *(UINT32*) Section->Size & 0xffffff;
+      if (Size < sizeof (*Section)) {
+        return;
+      }
+
+      EndOfSection = CurrentAddress + Size;
+      if (EndOfSection > EndOfFile) {
+        return;
+      }
+
+      //
+      // Look for executable sections
+      //
+      if (Section->Type == EFI_SECTION_PE32) {
+        Status = PeCoffLoaderGetEntryPoint ((VOID*) (Section + 1), PeiCoreEntryPoint);
+        if (!EFI_ERROR (Status)) {
+          return;
+        }
+      }
+    }
+
+  }
+}
+