Lost a file in last check-in.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11101 6f19259b-4bc3-4df7-8a09-765794883524

diff --git a/UefiCpuPkg/Library/SecPeiDxeTimerLibUefiCpu/IpfTimerLib.c b/UefiCpuPkg/Library/SecPeiDxeTimerLibUefiCpu/IpfTimerLib.c
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+++ b/UefiCpuPkg/Library/SecPeiDxeTimerLibUefiCpu/IpfTimerLib.c
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+/** @file\r
+  Timer Library functions built upon ITC on IPF.\r
+\r
+  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\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
+\r
+**/\r
+\r
+#include <Base.h>\r
+#include <Library/TimerLib.h>\r
+#include <Library/BaseLib.h>\r
+#include <Library/PalLib.h>\r
+\r
+\r
+/**\r
+  Performs a delay measured as number of ticks.\r
+\r
+  An internal function to perform a delay measured as number of ticks. It's\r
+  invoked by MicroSecondDelay() and NanoSecondDelay().\r
+\r
+  @param  Delay The number of ticks to delay.\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+InternalIpfDelay (\r
+  IN      INT64                     Delay\r
+  )\r
+{\r
+  INT64                             Ticks;\r
+\r
+  //\r
+  // The target timer count is calculated here\r
+  //\r
+  Ticks = (INT64)AsmReadItc () + Delay;\r
+\r
+  //\r
+  // Wait until time out\r
+  // Delay > 2^63 could not be handled by this function\r
+  // Timer wrap-arounds are handled correctly by this function\r
+  //\r
+  while (Ticks - (INT64)AsmReadItc() >= 0);\r
+}\r
+\r
+/**\r
+  Stalls the CPU for at least the given number of microseconds.\r
+\r
+  Stalls the CPU for the number of microseconds specified by MicroSeconds.\r
+\r
+  @param  MicroSeconds  The minimum number of microseconds to delay.\r
+\r
+  @return The value of MicroSeconds inputted.\r
+\r
+**/\r
+UINTN\r
+EFIAPI\r
+MicroSecondDelay (\r
+  IN      UINTN                     MicroSeconds\r
+  )\r
+{\r
+  InternalIpfDelay (\r
+    GetPerformanceCounterProperties (NULL, NULL) *\r
+    MicroSeconds /\r
+    1000000\r
+    );\r
+  return MicroSeconds;\r
+}\r
+\r
+/**\r
+  Stalls the CPU for at least the given number of nanoseconds.\r
+\r
+  Stalls the CPU for the number of nanoseconds specified by NanoSeconds.\r
+\r
+  @param  NanoSeconds The minimum number of nanoseconds to delay.\r
+\r
+  @return The value of NanoSeconds inputted.\r
+\r
+**/\r
+UINTN\r
+EFIAPI\r
+NanoSecondDelay (\r
+  IN      UINTN                     NanoSeconds\r
+  )\r
+{\r
+  InternalIpfDelay (\r
+    GetPerformanceCounterProperties (NULL, NULL) *\r
+    NanoSeconds /\r
+    1000000000\r
+    );\r
+  return NanoSeconds;\r
+}\r
+\r
+/**\r
+  Retrieves the current value of a 64-bit free running performance counter.\r
+\r
+  The counter can either count up by 1 or count down by 1. If the physical\r
+  performance counter counts by a larger increment, then the counter values\r
+  must be translated. The properties of the counter can be retrieved from\r
+  GetPerformanceCounterProperties().\r
+\r
+  @return The current value of the free running performance counter.\r
+\r
+**/\r
+UINT64\r
+EFIAPI\r
+GetPerformanceCounter (\r
+  VOID\r
+  )\r
+{\r
+  return AsmReadItc ();\r
+}\r
+\r
+/**\r
+  Retrieves the 64-bit frequency in Hz and the range of performance counter\r
+  values.\r
+\r
+  If StartValue is not NULL, then the value that the performance counter starts\r
+  with immediately after is it rolls over is returned in StartValue. If\r
+  EndValue is not NULL, then the value that the performance counter end with\r
+  immediately before it rolls over is returned in EndValue. The 64-bit\r
+  frequency of the performance counter in Hz is always returned. If StartValue\r
+  is less than EndValue, then the performance counter counts up. If StartValue\r
+  is greater than EndValue, then the performance counter counts down. For\r
+  example, a 64-bit free running counter that counts up would have a StartValue\r
+  of 0 and an EndValue of 0xFFFFFFFFFFFFFFFF. A 24-bit free running counter\r
+  that counts down would have a StartValue of 0xFFFFFF and an EndValue of 0.\r
+\r
+  @param  StartValue  The value the performance counter starts with when it\r
+                      rolls over.\r
+  @param  EndValue    The value that the performance counter ends with before\r
+                      it rolls over.\r
+\r
+  @return The frequency in Hz.\r
+\r
+**/\r
+UINT64\r
+EFIAPI\r
+GetPerformanceCounterProperties (\r
+  OUT      UINT64                    *StartValue,  OPTIONAL\r
+  OUT      UINT64                    *EndValue     OPTIONAL\r
+  )\r
+{\r
+  PAL_CALL_RETURN                   PalRet;\r
+  UINT64                            BaseFrequence;\r
+\r
+  if (StartValue != NULL) {\r
+    *StartValue = 0;\r
+  }\r
+\r
+  if (EndValue != NULL) {\r
+    *EndValue = (UINT64)(-1);\r
+  }\r
+\r
+  PalRet = PalCall (PAL_FREQ_BASE, 0, 0, 0);\r
+  if (PalRet.Status != 0) {\r
+    return 1000000;\r
+  }\r
+  BaseFrequence = PalRet.r9;\r
+\r
+  PalRet = PalCall (PAL_FREQ_RATIOS, 0, 0, 0);\r
+  if (PalRet.Status != 0) {\r
+    return 1000000;\r
+  }\r
+\r
+  return BaseFrequence * (PalRet.r11 >> 32) / (UINT32)PalRet.r11;\r
+}\r