e4a34497b4
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10593 6f19259b-4bc3-4df7-8a09-765794883524
38 lines
985 B
C
38 lines
985 B
C
/** @file
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AsmReadPmc function
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Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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/**
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Reads the current value of a Performance Counter (PMC).
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Reads and returns the current value of performance counter specified by
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Index. This function is only available on IA-32 and x64.
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@param Index The 32-bit Performance Counter index to read.
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@return The value of the PMC specified by Index.
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**/
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UINT64
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EFIAPI
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AsmReadPmc (
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IN UINT32 Index
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)
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{
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_asm {
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mov ecx, Index
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rdpmc
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}
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}
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