ArmPkg/CompilerIntrinsicsLib: Add uread, uwrite GCC assembly sources

[mirror_edk2.git] / Omap35xxPkg / Library / Omap35xxTimerLib / TimerLib.c

diff --git a/Omap35xxPkg/Library/Omap35xxTimerLib/TimerLib.c b/Omap35xxPkg/Library/Omap35xxTimerLib/TimerLib.c
index 652c47b6f61a8b737bf9c75feb8636bae83d8918..a69cad83a9293a08b7ff134e57794ee4e38ee081 100644 (file)
--- a/Omap35xxPkg/Library/Omap35xxTimerLib/TimerLib.c
+++ b/Omap35xxPkg/Library/Omap35xxTimerLib/TimerLib.c
@@ -2,13 +2,7 @@
 \r
   Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r
 \r
-  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
+  SPDX-License-Identifier: BSD-2-Clause-Patent\r
 \r
 **/\r
 \r
@@ -131,3 +125,27 @@ GetPerformanceCounterProperties (
 \r
   return PcdGet64(PcdEmbeddedPerformanceCounterFrequencyInHz);\r
 }\r
+\r
+/**\r
+  Converts elapsed ticks of performance counter to time in nanoseconds.\r
+\r
+  This function converts the elapsed ticks of running performance counter to\r
+  time value in unit of nanoseconds.\r
+\r
+  @param  Ticks     The number of elapsed ticks of running performance counter.\r
+\r
+  @return The elapsed time in nanoseconds.\r
+\r
+**/\r
+UINT64\r
+EFIAPI\r
+GetTimeInNanoSecond (\r
+  IN      UINT64                     Ticks\r
+  )\r
+{\r
+  UINT32 Period;\r
+\r
+  Period = PcdGet32 (PcdEmbeddedPerformanceCounterPeriodInNanoseconds);\r
+\r
+  return (Ticks * Period);\r
+}\r