1 files changed, 174 insertions, 0 deletions
diff --git a/EmulatorPkg/Library/PeiTimerLib/PeiTimerLib.c b/EmulatorPkg/Library/PeiTimerLib/PeiTimerLib.c
new file mode 100644
index 0000000000..caf8a7c14a
--- /dev/null
+++ b/EmulatorPkg/Library/PeiTimerLib/PeiTimerLib.c
@@ -0,0 +1,174 @@
+/** @file
+  A non-functional instance of the Timer Library.
+
+  Copyright (c) 2007 - 2010, 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 <PiPei.h>
+#include <Library/TimerLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PeiServicesLib.h>
+
+#include <Ppi/EmuThunk.h>
+#include <Protocol/EmuThunk.h>
+
+/**
+  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
+  )
+{
+  return NanoSecondDelay (MicroSeconds * 1000);
+}
+
+/**
+  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
+  )
+{
+  EMU_THUNK_PPI           *ThunkPpi;
+  EFI_STATUS              Status;
+  EMU_THUNK_PROTOCOL      *Thunk;
+
+  //
+  // Locate EmuThunkPpi for 
+  //
+  Status = PeiServicesLocatePpi (
+              &gEmuThunkPpiGuid,
+              0,
+              NULL,
+              (VOID **) &ThunkPpi
+             );
+  if (!EFI_ERROR (Status)) {   
+    Thunk  = (EMU_THUNK_PROTOCOL *)ThunkPpi->Thunk ();
+    Thunk->Sleep (NanoSeconds * 100);
+    return NanoSeconds;
+  }
+
+  return 0;
+}
+
+/**
+  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
+  )
+{
+  EMU_THUNK_PPI           *ThunkPpi;
+  EFI_STATUS              Status;
+  EMU_THUNK_PROTOCOL      *Thunk;
+
+  //
+  // Locate EmuThunkPpi for 
+  //
+  Status = PeiServicesLocatePpi (
+              &gEmuThunkPpiGuid,
+              0,
+              NULL,
+              (VOID **) &ThunkPpi
+             );
+  if (!EFI_ERROR (Status)) {   
+    Thunk  = (EMU_THUNK_PROTOCOL *)ThunkPpi->Thunk ();
+    return  Thunk->QueryPerformanceCounter ();
+  }
+
+  return 0;
+}
+
+/**
+  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
+  )
+{
+  EMU_THUNK_PPI           *ThunkPpi;
+  EFI_STATUS              Status;
+  EMU_THUNK_PROTOCOL      *Thunk;
+
+  //
+  // Locate EmuThunkPpi for 
+  //
+  Status = PeiServicesLocatePpi (
+              &gEmuThunkPpiGuid,
+              0,
+              NULL,
+              (VOID **) &ThunkPpi
+             );
+  if (!EFI_ERROR (Status)) {
+    if (StartValue != NULL) {
+      *StartValue = 0ULL;
+    }
+    if (EndValue != NULL) {
+      *EndValue = (UINT64)-1LL;
+    }
+    
+    Thunk  = (EMU_THUNK_PROTOCOL *)ThunkPpi->Thunk ();
+    return  Thunk->QueryPerformanceFrequency ();
+  }
+
+  return 0;
+}