;------------------------------------------------------------------------------ | |
; | |
; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR> | |
; SPDX-License-Identifier: BSD-2-Clause-Patent | |
; | |
; Module Name: | |
; | |
; WriteMsr64.Asm | |
; | |
; Abstract: | |
; | |
; AsmWriteMsr64 function | |
; | |
; Notes: | |
; | |
;------------------------------------------------------------------------------ | |
DEFAULT REL | |
SECTION .text | |
;------------------------------------------------------------------------------ | |
; UINT64 | |
; EFIAPI | |
; AsmWriteMsr64 ( | |
; IN UINT32 Index, | |
; IN UINT64 Value | |
; ); | |
;------------------------------------------------------------------------------ | |
global ASM_PFX(AsmWriteMsr64) | |
ASM_PFX(AsmWriteMsr64): | |
mov rax, rdx ; meanwhile, rax <- return value | |
shr rdx, 0x20 ; edx:eax contains the value to write | |
wrmsr | |
ret | |