From d99e698158f1525d8013168913299997786f2e28 Mon Sep 17 00:00:00 2001
From: rsun3 <rsun3@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Mon, 29 Nov 2010 03:37:13 +0000
Subject: 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
---
 .../Library/SecPeiDxeTimerLibUefiCpu/IpfTimerLib.c | 172 +++++++++++++++++++++
 1 file changed, 172 insertions(+)
 create mode 100644 UefiCpuPkg/Library/SecPeiDxeTimerLibUefiCpu/IpfTimerLib.c

(limited to 'UefiCpuPkg/Library')

diff --git a/UefiCpuPkg/Library/SecPeiDxeTimerLibUefiCpu/IpfTimerLib.c b/UefiCpuPkg/Library/SecPeiDxeTimerLibUefiCpu/IpfTimerLib.c
new file mode 100644
index 0000000000..06d5a3cebc
--- /dev/null
+++ b/UefiCpuPkg/Library/SecPeiDxeTimerLibUefiCpu/IpfTimerLib.c
@@ -0,0 +1,172 @@
+/** @file
+  Timer Library functions built upon ITC on IPF.
+
+  Copyright (c) 2006 - 2008, 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.
+
+**/
+
+#include <Base.h>
+#include <Library/TimerLib.h>
+#include <Library/BaseLib.h>
+#include <Library/PalLib.h>
+
+
+/**
+  Performs a delay measured as number of ticks.
+
+  An internal function to perform a delay measured as number of ticks. It's
+  invoked by MicroSecondDelay() and NanoSecondDelay().
+
+  @param  Delay The number of ticks to delay.
+
+**/
+VOID
+EFIAPI
+InternalIpfDelay (
+  IN      INT64                     Delay
+  )
+{
+  INT64                             Ticks;
+
+  //
+  // The target timer count is calculated here
+  //
+  Ticks = (INT64)AsmReadItc () + Delay;
+
+  //
+  // Wait until time out
+  // Delay > 2^63 could not be handled by this function
+  // Timer wrap-arounds are handled correctly by this function
+  //
+  while (Ticks - (INT64)AsmReadItc() >= 0);
+}
+
+/**
+  Stalls the CPU for at least the given number of microseconds.
+
+  Stalls the CPU for the number of microseconds specified by MicroSeconds.
+
+  @param  MicroSeconds  The minimum number of microseconds to delay.
+
+  @return The value of MicroSeconds inputted.
+
+**/
+UINTN
+EFIAPI
+MicroSecondDelay (
+  IN      UINTN                     MicroSeconds
+  )
+{
+  InternalIpfDelay (
+    GetPerformanceCounterProperties (NULL, NULL) *
+    MicroSeconds /
+    1000000
+    );
+  return MicroSeconds;
+}
+
+/**
+  Stalls the CPU for at least the given number of nanoseconds.
+
+  Stalls the CPU for the number of nanoseconds specified by NanoSeconds.
+
+  @param  NanoSeconds The minimum number of nanoseconds to delay.
+
+  @return The value of NanoSeconds inputted.
+
+**/
+UINTN
+EFIAPI
+NanoSecondDelay (
+  IN      UINTN                     NanoSeconds
+  )
+{
+  InternalIpfDelay (
+    GetPerformanceCounterProperties (NULL, NULL) *
+    NanoSeconds /
+    1000000000
+    );
+  return NanoSeconds;
+}
+
+/**
+  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
+  performance counter counts by a larger increment, then the counter values
+  must be translated. The properties of the counter can be retrieved from
+  GetPerformanceCounterProperties().
+
+  @return The current value of the free running performance counter.
+
+**/
+UINT64
+EFIAPI
+GetPerformanceCounter (
+  VOID
+  )
+{
+  return AsmReadItc ();
+}
+
+/**
+  Retrieves the 64-bit frequency in Hz and the range of performance counter
+  values.
+
+  If StartValue is not NULL, then the value that the performance counter starts
+  with immediately after is it rolls over is returned in StartValue. If
+  EndValue is not NULL, then the value that the performance counter end with
+  immediately before it rolls over is returned in EndValue. The 64-bit
+  frequency of the performance counter in Hz is always returned. If StartValue
+  is less than EndValue, then the performance counter counts up. If StartValue
+  is greater than EndValue, then the performance counter counts down. For
+  example, a 64-bit free running counter that counts up would have a StartValue
+  of 0 and an EndValue of 0xFFFFFFFFFFFFFFFF. A 24-bit free running counter
+  that counts down would have a StartValue of 0xFFFFFF and an EndValue of 0.
+
+  @param  StartValue  The value the performance counter starts with when it
+                      rolls over.
+  @param  EndValue    The value that the performance counter ends with before
+                      it rolls over.
+
+  @return The frequency in Hz.
+
+**/
+UINT64
+EFIAPI
+GetPerformanceCounterProperties (
+  OUT      UINT64                    *StartValue,  OPTIONAL
+  OUT      UINT64                    *EndValue     OPTIONAL
+  )
+{
+  PAL_CALL_RETURN                   PalRet;
+  UINT64                            BaseFrequence;
+
+  if (StartValue != NULL) {
+    *StartValue = 0;
+  }
+
+  if (EndValue != NULL) {
+    *EndValue = (UINT64)(-1);
+  }
+
+  PalRet = PalCall (PAL_FREQ_BASE, 0, 0, 0);
+  if (PalRet.Status != 0) {
+    return 1000000;
+  }
+  BaseFrequence = PalRet.r9;
+
+  PalRet = PalCall (PAL_FREQ_RATIOS, 0, 0, 0);
+  if (PalRet.Status != 0) {
+    return 1000000;
+  }
+
+  return BaseFrequence * (PalRet.r11 >> 32) / (UINT32)PalRet.r11;
+}
-- 
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