MdePkg/Library/DxeRuntimeExtendedSalLib/Ipf/AsmExtendedSalLib.s

   1 /// @file
   2 ///  Assembly procedures to get and set ESAL entry point.
   3 ///
   4 /// Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
   5 /// This program and the accompanying materials
   6 /// are licensed and made available under the terms and conditions of the BSD License
   7 /// which accompanies this distribution.  The full text of the license may be found at
   8 /// http://opensource.org/licenses/bsd-license.php.
   9 ///
  10 /// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 /// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 ///
  13
  14 .auto
  15 .text
  16
  17 #include  "IpfMacro.i"
  18
  19 //
  20 // Exports
  21 //
  22 ASM_GLOBAL GetEsalEntryPoint
  23
  24 //-----------------------------------------------------------------------------
  25 //++
  26 // GetEsalEntryPoint
  27 //
  28 // Return Esal global and PSR register.
  29 //
  30 // On Entry :
  31 //
  32 //
  33 // Return Value:
  34 //        r8  = EFI_SAL_SUCCESS
  35 //        r9  = Physical Plabel
  36 //        r10 = Virtual Plabel
  37 //        r11 = psr
  38 //
  39 // As per static calling conventions.
  40 //
  41 //--
  42 //---------------------------------------------------------------------------
  43 PROCEDURE_ENTRY (GetEsalEntryPoint)
  44
  45       NESTED_SETUP (0,8,0,0)
  46
  47 EsalCalcStart:
  48       mov   r8  = ip;;
  49       add   r8  = (EsalEntryPoint - EsalCalcStart), r8;;
  50       mov   r9  = r8;;
  51       add   r10 = 0x10, r8;;
  52       mov   r11 = psr;;
  53       mov   r8  = r0;;
  54
  55       NESTED_RETURN
  56
  57 PROCEDURE_EXIT (GetEsalEntryPoint)
  58
  59 //-----------------------------------------------------------------------------
  60 //++
  61 // SetEsalPhysicalEntryPoint
  62 //
  63 // Set the dispatcher entry point
  64 //
  65 // On Entry:
  66 //  in0 = Physical address of Esal Dispatcher
  67 //  in1 = Physical GP
  68 //
  69 // Return Value:
  70 //   r8 = EFI_SAL_SUCCESS
  71 //
  72 // As per static calling conventions.
  73 //
  74 //--
  75 //---------------------------------------------------------------------------
  76 PROCEDURE_ENTRY (SetEsalPhysicalEntryPoint)
  77
  78       NESTED_SETUP (2,8,0,0)
  79
  80 EsalCalcStart1:
  81       mov   r8   = ip;;
  82       add   r8   = (EsalEntryPoint - EsalCalcStart1), r8;;
  83       st8   [r8] = in0;;
  84       add   r8   = 0x08, r8;;
  85       st8   [r8] = in1;;
  86       mov   r8   = r0;;
  87
  88       NESTED_RETURN
  89
  90 PROCEDURE_EXIT (SetEsalPhysicalEntryPoint)
  91
  92 //-----------------------------------------------------------------------------
  93 //++
  94 // SetEsalVirtualEntryPoint
  95 //
  96 // Register physical address of Esal globals.
  97 //
  98 // On Entry :
  99 //  in0 = Virtual address of Esal Dispatcher
 100 //  in1 = Virtual GP
 101 //
 102 // Return Value:
 103 //  r8 = EFI_SAL_ERROR
 104 //
 105 // As per static calling conventions.
 106 //
 107 //--
 108 //---------------------------------------------------------------------------
 109 PROCEDURE_ENTRY (SetEsalVirtualEntryPoint)
 110
 111       NESTED_SETUP (2,8,0,0)
 112
 113 EsalCalcStart2:
 114       mov   r8   = ip;;
 115       add   r8   = (EsalEntryPoint - EsalCalcStart2), r8;;
 116       add   r8   = 0x10, r8;;
 117       st8   [r8] = in0;;
 118       add   r8   = 0x08, r8;;
 119       st8   [r8] = in1;;
 120       mov   r8   = r0;;
 121
 122       NESTED_RETURN
 123
 124 PROCEDURE_EXIT (SetEsalVirtualEntryPoint)
 125
 126 .align 32
 127 EsalEntryPoint:
 128     data8 0   // Physical Entry
 129     data8 0   //         GP
 130     data8 0   // Virtual Entry
 131     data8 0   //         GP