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