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 .code 25 26;------------------------------------------------------------------------------ 27; UINT64 28; EFIAPI 29; AsmWriteMsr64 ( 30; IN UINT32 Index, 31; IN UINT64 Value 32; ); 33;------------------------------------------------------------------------------ 34AsmWriteMsr64 PROC 35 mov rax, rdx ; meanwhile, rax <- return value 36 shr rdx, 20h ; edx:eax contains the value to write 37 wrmsr 38 ret 39AsmWriteMsr64 ENDP 40 41 END 42