MdePkg/Include/Ppi/TemporaryRamSupport.h

/** @file
  This file declares Temporary RAM Support PPI.
  This Ppi provides the service that migrates temporary RAM into permanent memory.

  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

  @par Revision Reference:
  This PPI is introduced in PI Version 1.0.

**/

#ifndef __TEMPORARY_RAM_SUPPORT_H__
#define __TEMPORARY_RAM_SUPPORT_H__

///
/// Note: The GUID name EFI_PEI_TEMPORARY_RAM_SUPPORT_PPI_GUID is different from the current
///       PI 1.2 spec.
///
#define EFI_PEI_TEMPORARY_RAM_SUPPORT_PPI_GUID  \
  { 0xdbe23aa9, 0xa345, 0x4b97, {0x85, 0xb6, 0xb2, 0x26, 0xf1, 0x61, 0x73, 0x89} }

/**
  This service of the EFI_PEI_TEMPORARY_RAM_SUPPORT_PPI that migrates temporary RAM into
  permanent memory.

  @param PeiServices            Pointer to the PEI Services Table.
  @param TemporaryMemoryBase    Source Address in temporary memory from which the SEC or PEIM will copy the
                                Temporary RAM contents.
  @param PermanentMemoryBase    Destination Address in permanent memory into which the SEC or PEIM will copy the
                                Temporary RAM contents.
  @param CopySize               Amount of memory to migrate from temporary to permanent memory.

  @retval EFI_SUCCESS           The data was successfully returned.
  @retval EFI_INVALID_PARAMETER PermanentMemoryBase + CopySize > TemporaryMemoryBase when
                                TemporaryMemoryBase > PermanentMemoryBase.

**/
typedef
EFI_STATUS
(EFIAPI *TEMPORARY_RAM_MIGRATION)(
  IN CONST EFI_PEI_SERVICES   **PeiServices,
  IN EFI_PHYSICAL_ADDRESS     TemporaryMemoryBase,
  IN EFI_PHYSICAL_ADDRESS     PermanentMemoryBase,
  IN UINTN                    CopySize
  );

///
/// This service abstracts the ability to migrate contents of the platform early memory store.
/// Note: The name EFI_PEI_TEMPORARY_RAM_SUPPORT_PPI is different from the current PI 1.2 spec.
///       This PPI was optional.
///
typedef struct {
  TEMPORARY_RAM_MIGRATION    TemporaryRamMigration;
} EFI_PEI_TEMPORARY_RAM_SUPPORT_PPI;

extern EFI_GUID  gEfiTemporaryRamSupportPpiGuid;

#endif