MdePkg/Library/BaseLib/Ia32/WriteMsr64.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2006, Intel Corporation
   4 # All rights reserved. This program and the accompanying materials
   5 # are licensed and made available under the terms and conditions of the BSD License
   6 # which accompanies this distribution.  The full text of the license may be found at
   7 # http://opensource.org/licenses/bsd-license.php
   8 #
   9 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11 #
  12 # Module Name:
  13 #
  14 #   WriteMsr64.Asm
  15 #
  16 # Abstract:
  17 #
  18 #   AsmWriteMsr64 function
  19 #
  20 # Notes:
  21 #
  22 #------------------------------------------------------------------------------
  23
  24 #------------------------------------------------------------------------------
  25 # UINT64
  26 # EFIAPI
  27 # AsmWriteMsr64 (
  28 #   IN UINT32  Index,
  29 #   IN UINT64  Value
  30 #   );
  31 #------------------------------------------------------------------------------
  32 .globl ASM_PFX(AsmWriteMsr64)
  33 ASM_PFX(AsmWriteMsr64):
  34     movl    12(%esp), %edx
  35     movl    8(%esp), %eax
  36     movl    4(%esp), %ecx
  37     wrmsr
  38     ret