Tools/Source/TianoTools/Common/PeiLib/Ipf/PerformancePrimitives.s

   1 //++
   2 // Copyright (c) 2004, Intel Corporation
   3 // All rights reserved. This program and the accompanying materials
   4 // are licensed and made available under the terms and conditions of the BSD License
   5 // which accompanies this distribution.  The full text of the license may be found at
   6 // http://opensource.org/licenses/bsd-license.php
   7 //
   8 // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
   9 // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  10 //
  11 //  Module Name:
  12 //
  13 //    PerformancePrimitives.s
  14 //
  15 //  Abstract:
  16 //
  17 //
  18 // Revision History:
  19 //
  20 //--
  21
  22 .file  "PerformancePrimitives.s"
  23
  24 #include  "IpfMacro.i"
  25
  26 //-----------------------------------------------------------------------------
  27 //++
  28 // GetTimerValue
  29 //
  30 // Implementation of CPU-based time service
  31 //
  32 // On Entry :
  33 //    EFI_STATUS
  34 //    GetTimerValue (
  35 //      OUT UINT64    *TimerValue
  36 //    )
  37 //
  38 // Return Value:
  39 //        r8  = Status
  40 //        r9  = 0
  41 //        r10 = 0
  42 //        r11 = 0
  43 //
  44 // As per static calling conventions.
  45 //
  46 //--
  47 //---------------------------------------------------------------------------
  48 PROCEDURE_ENTRY (GetTimerValue)
  49
  50       NESTED_SETUP (1,8,0,0)
  51       mov               r8 = ar.itc;;
  52       st8               [r32]= r8
  53       mov               r8 = r0
  54       mov               r9 = r0
  55       mov               r10 = r0
  56       mov               r11 = r0
  57       NESTED_RETURN
  58
  59 PROCEDURE_EXIT (GetTimerValue)
  60 //---------------------------------------------------------------------------
  61