[mirror_edk2.git] / EdkCompatibilityPkg / Foundation / Library / EdkIIGlueLib / Library / BaseLib / X64 / ReadMsr64.asm

; Copyright (c) 2004, Intel Corporation. All rights reserved.<BR>\r
; This program and the accompanying materials                          \r
; are licensed and made available under the terms and conditions of the BSD License         \r
; which accompanies this distribution.  The full text of the license may be found at        \r
; http://opensource.org/licenses/bsd-license.php                                            \r
;                                                                                           \r
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.    \r
;\r
; Module Name:\r
;\r
;   ReadMsr64.Asm\r
;\r
; Abstract:\r
;\r
;   AsmReadMsr64 function\r
;\r
; Notes:\r
;\r
;------------------------------------------------------------------------------\r
\r
    .code\r
\r
;------------------------------------------------------------------------------\r
; UINT64\r
; EFIAPI\r
; AsmReadMsr64 (\r
;   IN UINT32  Index\r
;   );\r
;------------------------------------------------------------------------------\r
AsmReadMsr64    PROC\r
    rdmsr                               ; edx & eax are zero extended\r
    shl     rdx, 20h\r
    or      rax, rdx\r
    ret\r
AsmReadMsr64    ENDP\r
\r
    END\r
Commit	Line	Data
2c7e5c2f HT	1	; Copyright (c) 2004, Intel Corporation. All rights reserved.<BR>\r
2c7e5c2f HT	2	; This program and the accompanying materials \r
3eb9473e	3	; are licensed and made available under the terms and conditions of the BSD License \r
	4	; which accompanies this distribution. The full text of the license may be found at \r
	5	; http://opensource.org/licenses/bsd-license.php \r
	6	; \r
	7	; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
	8	; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
	9	;\r
	10	; Module Name:\r
	11	;\r
	12	; ReadMsr64.Asm\r
	13	;\r
	14	; Abstract:\r
	15	;\r
	16	; AsmReadMsr64 function\r
	17	;\r
	18	; Notes:\r
	19	;\r
	20	;------------------------------------------------------------------------------\r
	21	\r
	22	.code\r
	23	\r
	24	;------------------------------------------------------------------------------\r
	25	; UINT64\r
	26	; EFIAPI\r
	27	; AsmReadMsr64 (\r
	28	; IN UINT32 Index\r
	29	; );\r
	30	;------------------------------------------------------------------------------\r
	31	AsmReadMsr64 PROC\r
	32	rdmsr ; edx & eax are zero extended\r
	33	shl rdx, 20h\r
	34	or rax, rdx\r
	35	ret\r
	36	AsmReadMsr64 ENDP\r
	37	\r
	38	END\r