Add capsule > 4GB support. When capsule data is put above 4GB, IA32 PEI transfers to long mode to get capsule data.

Signed-off-by: li-elvin
Reviewed-by: lgao4, mdkinney


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12264 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/CapsulePei/X64/X64Entry.c

@@ -0,0 +1,66 @@
+/** @file
+  The X64 entrypoint is used to process capsule in long mode.
+
+Copyright (c) 2011, Intel Corporation. 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 <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include "CommonHeader.h"
+
+/**
+  The X64 entrypoint is used to process capsule in long mode then
+  return to 32-bit protected mode.
+
+  @param  EntrypointContext   Pointer to the context of long mode.
+  @param  ReturnContext       Pointer to the context of 32-bit protected mode.
+
+  @retval This function should never return actually.
+
+**/
+EFI_STATUS
+EFIAPI
+_ModuleEntryPoint (
+  SWITCH_32_TO_64_CONTEXT       *EntrypointContext,
+  SWITCH_64_TO_32_CONTEXT       *ReturnContext
+)
+{
+  EFI_STATUS    Status;
+
+  //
+  // Call CapsuleDataCoalesce to process capsule.
+  //
+  Status = CapsuleDataCoalesce (
+             NULL,
+             (EFI_PHYSICAL_ADDRESS *) (UINTN) EntrypointContext->BlockListAddr,
+             (VOID **) (UINTN) EntrypointContext->MemoryBase64Ptr,
+             (UINTN *) (UINTN) EntrypointContext->MemorySize64Ptr
+             );
+  
+  ReturnContext->ReturnStatus = Status;
+
+  //
+  // Finish to coalesce capsule, and return to 32-bit mode.
+  //
+  AsmDisablePaging64 (
+    ReturnContext->ReturnCs,
+    (UINT32) ReturnContext->ReturnEntryPoint,
+    (UINT32) (UINTN) EntrypointContext,
+    (UINT32) (UINTN) ReturnContext,
+    (UINT32) (EntrypointContext->StackBufferBase + EntrypointContext->StackBufferLength)
+    );  
+  
+  //
+  // Should never be here.
+  //
+  ASSERT (FALSE);
+  return EFI_SUCCESS;
+}