| /** @file | |
| AsmReadPmc function | |
| Copyright (c) 2006 - 2008, 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. | |
| **/ | |
| /** | |
| Reads the current value of a Performance Counter (PMC). | |
| Reads and returns the current value of performance counter specified by | |
| Index. This function is only available on IA-32 and x64. | |
| @param Index The 32-bit Performance Counter index to read. | |
| @return The value of the PMC specified by Index. | |
| **/ | |
| UINT64 | |
| EFIAPI | |
| AsmReadPmc ( | |
| IN UINT32 Index | |
| ) | |
| { | |
| _asm { | |
| mov ecx, Index | |
| rdpmc | |
| } | |
| } | |