From b7c51c9cf4864df6aabb99a1ae843becd577237c Mon Sep 17 00:00:00 2001
From: raywu <raywu0301@gmail.com>
Date: Fri, 15 Jun 2018 00:00:50 +0800
Subject: init. 1AQQW051

---
 Core/CPU/x64/x64AsmLib/ReadMsr.asm | 85 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 Core/CPU/x64/x64AsmLib/ReadMsr.asm

(limited to 'Core/CPU/x64/x64AsmLib/ReadMsr.asm')

diff --git a/Core/CPU/x64/x64AsmLib/ReadMsr.asm b/Core/CPU/x64/x64AsmLib/ReadMsr.asm
new file mode 100644
index 0000000..3fbeff6
--- /dev/null
+++ b/Core/CPU/x64/x64AsmLib/ReadMsr.asm
@@ -0,0 +1,85 @@
+;*************************************************************************
+;*************************************************************************
+;**                                                                     **
+;**        (C)Copyright 1985-2009, American Megatrends, Inc.            **
+;**                                                                     **
+;**                       All Rights Reserved.                          **
+;**                                                                     **
+;**      5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093           **
+;**                                                                     **
+;**                       Phone: (770)-246-8600                         **
+;**                                                                     **
+;*************************************************************************
+;*************************************************************************
+
+;*************************************************************************
+; $Header: /Alaska/SOURCE/Core/Modules/x64Core/x64AsmLib/ReadMsr.asm 1     10/01/10 5:08p Felixp $
+;
+; $Revision: 1 $
+;
+; $Date: 10/01/10 5:08p $
+;*************************************************************************
+; Revision History
+; ----------------
+; $Log: /Alaska/SOURCE/Core/Modules/x64Core/x64AsmLib/ReadMsr.asm $
+; 
+; 1     10/01/10 5:08p Felixp
+; 
+; 1     8/24/06 12:57p Felixp
+; 
+;*************************************************************************
+;<AMI_FHDR_START>
+;
+; Name:
+;
+; Description:
+;
+;<AMI_FHDR_END>
+;*************************************************************************
+.code
+
+;*************************************************************************
+;<AMI_PHDR_START>
+;
+; Name: ReadMsr
+;
+; Description:
+;  UINT64 ReadMsr(UINT32 Msr) reads the CPU MSR index defined by Msr and
+; returns the value.
+;
+; Input:
+;  IN UINT32 Msr
+; 32-bit MSR index to be read.
+;
+; Output:
+;  UINT64 MSR value at MSR index, Msr.
+;
+; Modified:
+;
+; Referrals:
+;
+; Notes:
+;
+;<AMI_PHDR_END>
+;*************************************************************************
+ReadMsr Proc ;(UINT32 Msr)
+    rdmsr       ;rcx = MSR
+    and     rax, 0ffffffffh
+    shl     rdx, 32
+    or      rax, rdx              ;rax = (rdx << 32) | eax
+	ret
+ReadMsr endp
+
+END
+;*************************************************************************
+;*************************************************************************
+;**                                                                     **
+;**        (C)Copyright 1985-2009, American Megatrends, Inc.            **
+;**                                                                     **
+;**                       All Rights Reserved.                          **
+;**                                                                     **
+;**      5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093           **
+;**                                                                     **
+;**                       Phone: (770)-246-8600                         **
+;**                                                                     **
+;*************************************************************************
-- 
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