1. Updated CpuFlushTlb() according to IA-64 programmer's guide

[mirror_edk2.git] / MdePkg / Library / BaseMemoryLibRepStr / CopyMemWrapper.c

/** @file\r
  CopyMem() implementation.\r
\r
  Copyright (c) 2006, Intel Corporation<BR>\r
  All rights reserved. This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
  Module Name:  CopyMemWrapper.c\r
\r
  The following BaseMemoryLib instances share the same version of this file:\r
\r
    BaseMemoryLib\r
    BaseMemoryLibMmx\r
    BaseMemoryLibSse2\r
    BaseMemoryLibRepStr\r
    PeiMemoryLib\r
    UefiMemoryLib\r
\r
**/\r
\r
#include "MemLibInternals.h"\r
\r
/**\r
  Copy Length bytes from Source to Destination.\r
\r
  This function copies Length bytes from SourceBuffer to DestinationBuffer, and\r
  returns DestinationBuffer. The implementation must be reentrant, and it must\r
  handle the case where SourceBuffer overlaps DestinationBuffer.\r
\r
  If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then\r
  ASSERT().\r
  If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().\r
\r
  @param  Destination Target of copy\r
  @param  Source Place to copy from\r
  @param  Length Number of bytes to copy\r
\r
  @return Destination\r
\r
**/\r
VOID *\r
EFIAPI\r
CopyMem (\r
  OUT     VOID                      *Destination,\r
  IN      CONST VOID                *Source,\r
  IN      UINTN                     Length\r
  )\r
{\r
  ASSERT (\r
    Destination == NULL ||\r
    Length <= MAX_ADDRESS - (UINTN)Destination + 1\r
    );\r
  ASSERT (\r
    Source == NULL ||\r
    Length <= MAX_ADDRESS - (UINTN)Source + 1\r
    );\r
  if (Destination == Source || Length == 0) {\r
    return Destination;\r
  }\r
  return InternalMemCopyMem (Destination, Source, Length);\r
}\r