mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-23 11:35:19 +01:00
36 lines
911 B
NASM
36 lines
911 B
NASM
;------------------------------------------------------------------------------
|
|
;
|
|
; 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
|
|
|