1 files changed, 46 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseTimerLibTsc/TimerLibTsc.c b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseTimerLibTsc/TimerLibTsc.c
new file mode 100644
index 0000000..7860d8d
--- /dev/null
+++ b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseTimerLibTsc/TimerLibTsc.c
@@ -0,0 +1,46 @@
+/*++
+
+Copyright (c) 2011, 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                                            
+                                                                                          
+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:
+
+  TimerLibTsc.c
+  
+Abstract: 
+
+  Timer Library based on TSC timer.
+
+--*/
+
+#include "EdkIIGlueBase.h"
+
+/**
+  Converts TSC value into nano second value.
+
+  @param  Timestamp  TSC ticker
+
+  @return UINT64 value in naosecond unit converted from TSC
+
+**/
+UINT64
+EFIAPI
+GetTimeInNanoSec (
+  UINT64 Timestamp
+  )
+{
+  UINT64  pi;
+  UINT8   Ratio;
+
+  pi    = AsmReadMsr64 (PcdGet16(PlatformInfoMsr));
+  Ratio = (UINT8) (((UINT32) (UINTN) RShiftU64 (pi, 8)) & 0xff);
+
+  return (UINT64) DivU64x32 (MultU64x32 (Timestamp, 10), (UINT32) (Ratio));
+}