;------------------------------------------------------------------------------
;
; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
; This program and the accompanying materials
; are licensed and made available under the terms and conditions of the BSD License
; which accompanies this distribution.  The full text of the license may be found at
; http://opensource.org/licenses/bsd-license.php.
;
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
;
; 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

