Add 4 Framework/PI SMM thunk drivers. Combined use of these drivers can support usage model of PI SMM infrastructure + Framework Chipset SMM code + Framework platform SMM code in ECP platforms.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9657 6f19259b-4bc3-4df7-8a09-765794883524

EdkCompatibilityPkg/Compatibility/SmmAccess2OnSmmAccessThunk/SmmAccess2OnSmmAccessThunk.h

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+/** @file
+  Include file for SMM Access2 Protocol on SMM Access Protocol Thunk driver.
+  
+  Copyright (c) 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.
+
+**/
+
+#ifndef  _SMM_ACCESS2_ON_SMM_ACCESS_THUNK_H_
+#define  _SMM_ACCESS2_ON_SMM_ACCESS_THUNK_H_
+
+#include <PiDxe.h>
+#include <FrameworkSmm.h>
+#include <Library/DebugLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiDriverEntryPoint.h>
+#include <Protocol/SmmAccess2.h>
+#include <Protocol/SmmAccess.h>
+
+/**
+  Opens the SMRAM area to be accessible by a boot-service driver.
+
+  This function "opens" SMRAM so that it is visible while not inside of SMM. The function should 
+  return EFI_UNSUPPORTED if the hardware does not support hiding of SMRAM. The function 
+  should return EFI_DEVICE_ERROR if the SMRAM configuration is locked.
+
+  @param[in] This           The EFI_SMM_ACCESS2_PROTOCOL instance.
+
+  @retval EFI_SUCCESS       The operation was successful.
+  @retval EFI_UNSUPPORTED   The system does not support opening and closing of SMRAM.
+  @retval EFI_DEVICE_ERROR  SMRAM cannot be opened, perhaps because it is locked.
+**/
+EFI_STATUS
+EFIAPI
+SmmAccess2Open (
+  IN EFI_SMM_ACCESS2_PROTOCOL  *This
+  );
+
+/**
+  Inhibits access to the SMRAM.
+
+  This function "closes" SMRAM so that it is not visible while outside of SMM. The function should 
+  return EFI_UNSUPPORTED if the hardware does not support hiding of SMRAM.
+
+  @param[in] This           The EFI_SMM_ACCESS2_PROTOCOL instance.
+
+  @retval EFI_SUCCESS       The operation was successful.
+  @retval EFI_UNSUPPORTED   The system does not support opening and closing of SMRAM.
+  @retval EFI_DEVICE_ERROR  SMRAM cannot be closed.
+**/
+EFI_STATUS
+EFIAPI
+SmmAccess2Close (
+  IN EFI_SMM_ACCESS2_PROTOCOL  *This
+  );
+
+/**
+  Inhibits access to the SMRAM.
+
+  This function prohibits access to the SMRAM region.  This function is usually implemented such 
+  that it is a write-once operation. 
+
+  @param[in] This          The EFI_SMM_ACCESS2_PROTOCOL instance.
+
+  @retval EFI_SUCCESS      The device was successfully locked.
+  @retval EFI_UNSUPPORTED  The system does not support locking of SMRAM.
+**/
+EFI_STATUS
+EFIAPI
+SmmAccess2Lock (
+  IN EFI_SMM_ACCESS2_PROTOCOL  *This
+  );
+
+/**
+  Queries the memory controller for the possible regions that will support SMRAM.
+
+  @param[in]     This           The EFI_SMM_ACCESS2_PROTOCOL instance.
+  @param[in,out] SmramMapSize   A pointer to the size, in bytes, of the SmramMemoryMap buffer.
+  @param[in,out] SmramMap       A pointer to the buffer in which firmware places the current memory map.
+
+  @retval EFI_SUCCESS           The chipset supported the given resource.
+  @retval EFI_BUFFER_TOO_SMALL  The SmramMap parameter was too small.  The current buffer size 
+                                needed to hold the memory map is returned in SmramMapSize.
+**/
+EFI_STATUS
+EFIAPI
+SmmAccess2GetCapabilities (
+  IN CONST EFI_SMM_ACCESS2_PROTOCOL  *This,
+  IN OUT UINTN                       *SmramMapSize,
+  IN OUT EFI_SMRAM_DESCRIPTOR        *SmramMap
+  );
+
+#endif