X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=MdePkg%2FInclude%2FLibrary%2FTimerLib.h;h=ecc3ad3ff79ec7b69a7004f667d12035126f0a0d;hb=62ec4a5ef674846f3edd0317e59b0c509873b3b5;hp=8f31bbb5f32f5d7c9de0c2c34921a27546dc2f37;hpb=fb3df220f89e6eecaf1862b9241d8a1214eeda1c;p=mirror_edk2.git

diff --git a/MdePkg/Include/Library/TimerLib.h b/MdePkg/Include/Library/TimerLib.h
index 8f31bbb5f3..ecc3ad3ff7 100644
--- a/MdePkg/Include/Library/TimerLib.h
+++ b/MdePkg/Include/Library/TimerLib.h
@@ -1,16 +1,14 @@
 /** @file
-  Timer Library Functions
+  Provides calibrated delay and performance counter services.
 
-  Copyright (c) 2006, Intel Corporation
-  All rights reserved. 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
+Copyright (c) 2006 - 2011, 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.
-
-  Module Name:  TimerLib.h
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
 **/
 
@@ -24,7 +22,7 @@
 
   @param  MicroSeconds  The minimum number of microseconds to delay.
 
-  @return MicroSeconds
+  @return The value of MicroSeconds inputted.
 
 **/
 UINTN
@@ -40,7 +38,7 @@ MicroSecondDelay (
 
   @param  NanoSeconds The minimum number of nanoseconds to delay.
 
-  @return NanoSeconds
+  @return The value of NanoSeconds inputted.
 
 **/
 UINTN
@@ -52,8 +50,7 @@ NanoSecondDelay (
 /**
   Retrieves the current value of a 64-bit free running performance counter.
 
-  Retrieves the current value of a 64-bit free running performance counter. The
-  counter can either count up by 1 or count down by 1. If the physical
+  The counter can either count up by 1 or count down by 1. If the physical
   performance counter counts by a larger increment, then the counter values
   must be translated. The properties of the counter can be retrieved from
   GetPerformanceCounterProperties().
@@ -97,4 +94,21 @@ GetPerformanceCounterProperties (
   OUT      UINT64                    *EndValue     OPTIONAL
   );
 
+/**
+  Converts elapsed ticks of performance counter to time in nanoseconds.
+
+  This function converts the elapsed ticks of running performance counter to
+  time value in unit of nanoseconds.
+
+  @param  Ticks     The number of elapsed ticks of running performance counter.
+
+  @return The elapsed time in nanoseconds.
+
+**/
+UINT64
+EFIAPI
+GetTimeInNanoSecond (
+  IN      UINT64                     Ticks
+  );
+
 #endif