EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/Ipf/HwAccess.s

   1 //++
   2 // Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>
   3 // 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 //  HWAccess.s
  14 //
  15 // Abstract:
  16 //
  17 //  Contains an implementation of Read/Write Kr7 for the Itanium-based architecture.
  18 //
  19 //
  20 //
  21 // Revision History:
  22 //
  23 //--
  24
  25   .file  "HWAccess.s"
  26 #include  "IpfMacro.i"
  27
  28
  29 //----------------------------------------------------------------------------------
  30 //++
  31 //VOID
  32 //AsmWriteKr7 (
  33 //  UINT64
  34 //  );
  35 //
  36 // This routine saves the given input value into the kernel register 7
  37 //
  38 // Arguments :
  39 //
  40 // On Entry :  64 bit value to be saved.
  41 //
  42 // Return Value: None
  43 //
  44 //--
  45 //----------------------------------------------------------------------------------
  46 PROCEDURE_ENTRY (AsmWriteKr7)
  47         NESTED_SETUP (1,2,0,0)
  48         mov ar.k7 = in0;;
  49         NESTED_RETURN
  50
  51 PROCEDURE_EXIT (AsmWriteKr7)
  52
  53 //---------------------------------------------------------------------------------
  54 //++
  55 //UINT64
  56 //AsmReadKr7 (
  57 //  VOID
  58 //  );
  59 //
  60 // This routine returns the value of the kernel register 7
  61 //
  62 // Arguments :
  63 //
  64 // On Entry :  None
  65 //
  66 // Return Value: 64bit Value of the register.
  67 //
  68 //--
  69 //----------------------------------------------------------------------------------
  70 PROCEDURE_ENTRY (AsmReadKr7)
  71         NESTED_SETUP (0,2,0,0)
  72         mov r8 = ar.k7;;
  73         NESTED_RETURN
  74 PROCEDURE_EXIT (AsmReadKr7)
  75 //----------------------------------------------------------------------------------
  76
  77