EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/WriteMsr64.c

   1 /**
   2   CpuBreakpoint function.
   3
   4   Copyright (c) 2006 - 2007, Intel Corporation. All rights reserved.<BR>
   5   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include "BaseLibInternals.h"
  16
  17
  18 //
  19 // Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics
  20 //
  21 void __writemsr (unsigned long Register, unsigned __int64 Value);
  22
  23 #pragma intrinsic(__writemsr)
  24
  25 UINT64
  26 EFIAPI
  27 AsmWriteMsr64 (
  28   IN UINT32  Index,
  29   IN UINT64  Value
  30   )
  31 {
  32   __writemsr (Index, Value);
  33   return Value;
  34 }
  35