Code Scrub for MdePkg.

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / ReadPmc.c

/** @file\r
  AsmReadPmc function\r
\r
  Copyright (c) 2006 - 2007, Intel Corporation<BR>\r
  All rights reserved. This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
//\r
// Include common header file for this module.\r
//\r
\r
\r
/**\r
  Reads the current value of a Performance Counter (PMC).\r
\r
  Reads and returns the current value of performance counter specified by\r
  Index. This function is only available on IA-32 and X64.\r
\r
  @param  Index The 32-bit Performance Counter index to read.\r
\r
  @return The value of the PMC specified by Index.\r
\r
**/\r
UINT64\r
EFIAPI\r
AsmReadPmc (\r
  IN UINT32   PmcIndex\r
  )\r
{\r
  _asm {\r
    mov     ecx, PmcIndex\r
    rdpmc\r
  }\r
}\r
\r