| /** @file | |
| AsmReadPmc function | |
| Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> | |
| SPDX-License-Identifier: BSD-2-Clause-Patent | |
| **/ | |
| /** | |
| 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 | |
| } | |
| } |