MdePkg/Library/BaseLib/Ia32/ReadMsr64.c File Reference


Functions

UINT64 EFIAPI AsmReadMsr64 (IN UINT32 Index)

Detailed Description

AsmReadMsr64 function

Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.


Function Documentation

UINT64 EFIAPI AsmReadMsr64 ( IN UINT32  Index  ) 

Returns a 64-bit Machine Specific Register(MSR).

Reads and returns the 64-bit MSR specified by Index. No parameter checking is performed on Index, and some Index values may cause CPU exceptions. The caller must either guarantee that Index is valid, or the caller must set up exception handlers to catch the exceptions. This function is only available on IA-32 and x64.

Parameters:
Index The 32-bit MSR index to read.
Returns:
The value of the MSR identified by Index.

References ecx, and mov.


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