1;------------------------------------------------------------------------------
2;
3; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
4; 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    DEFAULT REL
25    SECTION .text
26
27;------------------------------------------------------------------------------
28; UINT64
29; EFIAPI
30; AsmWriteMsr64 (
31;   IN UINT32  Index,
32;   IN UINT64  Value
33;   );
34;------------------------------------------------------------------------------
35global ASM_PFX(AsmWriteMsr64)
36ASM_PFX(AsmWriteMsr64):
37    mov     rax, rdx                    ; meanwhile, rax <- return value
38    shr     rdx, 0x20                    ; edx:eax contains the value to write
39    wrmsr
40    ret
41
42