summaryrefslogtreecommitdiff
path: root/MdePkg/Library/BaseLib/Ia32/WriteMsr64.c
blob: 778fb9fd16677b50c58167f993b60d12dcd277b9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
/** @file
  AsmWriteMsr64 function

  Copyright (c) 2006, Intel Corporation<BR>
  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.

**/

#if _MSC_EXTENSIONS

UINT64
EFIAPI
AsmWriteMsr64 (
  IN UINT32  Index,
  IN UINT64  Value
  )
{
  _asm {
    mov     edx, dword ptr [Value + 4]
    mov     eax, dword ptr [Value + 0]
    mov     ecx, Index
    wrmsr
  }
}

#endif