ArmPkg/Include/AsmMacroIoLib.inc

   1 ;%HEADER%
   2 ;/** @file
   3 ;  Macros to work around lack of Apple support for LDR register, =expr
   4 ;
   5 ;  Copyright (c) 2009, Apple Inc. All rights reserved.<BR>
   6 ;  Copyright (c) 2011-2012, ARM Ltd. All rights reserved.<BR>
   7 ;
   8 ;  This program and the accompanying materials
   9 ;  are licensed and made available under the terms and conditions of the BSD License
  10 ;  which accompanies this distribution.  The full text of the license may be found at
  11 ;  http://opensource.org/licenses/bsd-license.php
  12 ;
  13 ;  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  14 ;  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  15 ;
  16 ;**/
  17
  18
  19   MACRO
  20   MmioWrite32Macro $Address, $Data
  21   ldr  r1, = ($Address)
  22   ldr  r0, = ($Data)
  23   str  r0, [r1]
  24   MEND
  25
  26   MACRO
  27   MmioOr32Macro $Address, $OrData
  28   ldr  r1, =($Address)
  29   ldr  r2, =($OrData)
  30   ldr  r0, [r1]
  31   orr  r0, r0, r2
  32   str  r0, [r1]
  33   MEND
  34
  35   MACRO
  36   MmioAnd32Macro $Address, $AndData
  37   ldr  r1, =($Address)
  38   ldr  r2, =($AndData)
  39   ldr  r0, [r1]
  40   and  r0, r0, r2
  41   str  r0, [r1]
  42   MEND
  43
  44   MACRO
  45   MmioAndThenOr32Macro $Address, $AndData, $OrData
  46   ldr  r1, =($Address)
  47   ldr  r0, [r1]
  48   ldr  r2, =($AndData)
  49   and  r0, r0, r2
  50   ldr  r2, =($OrData)
  51   orr  r0, r0, r2
  52   str  r0, [r1]
  53   MEND
  54
  55   MACRO
  56   MmioWriteFromReg32Macro $Address, $Reg
  57   ldr  r1, =($Address)
  58   str  $Reg, [r1]
  59   MEND
  60
  61   MACRO
  62   MmioRead32Macro $Address
  63   ldr  r1, =($Address)
  64   ldr  r0, [r1]
  65   MEND
  66
  67   MACRO
  68   MmioReadToReg32Macro $Address, $Reg
  69   ldr  r1, =($Address)
  70   ldr  $Reg, [r1]
  71   MEND
  72
  73   MACRO
  74   LoadConstantMacro $Data
  75   ldr  r0, =($Data)
  76   MEND
  77
  78   MACRO
  79   LoadConstantToRegMacro $Data, $Reg
  80   ldr  $Reg, =($Data)
  81   MEND
  82
  83   ; The reserved place must be 8-bytes aligned for pushing 64-bit variable on the stack
  84   ; Note: Global Size will be modified
  85   MACRO
  86   SetPrimaryStack $StackTop, $GlobalSize, $Tmp
  87   and     $Tmp, $GlobalSize, #7
  88   rsbne   $Tmp, $Tmp, #8
  89   add     $GlobalSize, $GlobalSize, $Tmp
  90   sub     sp, $StackTop, $GlobalSize
  91
  92   ; Set all the global variables to 0
  93   mov     $Tmp, sp
  94   mov     $GlobalSize, #0x0
  95 _SetPrimaryStackInitGlobals
  96   cmp     $Tmp, $StackTop
  97   beq     _SetPrimaryStackEnd
  98   str     $GlobalSize, [$Tmp], #4
  99   b       _SetPrimaryStackInitGlobals
 100 _SetPrimaryStackEnd
 101   MEND
 102
 103   MACRO
 104   InitializePrimaryStack $GlobalSize, $Tmp1
 105   and     $Tmp1, $GlobalSize, #7
 106   rsbne   $Tmp1, $Tmp1, #8
 107   add     $GlobalSize, $GlobalSize, $Tmp1
 108
 109   mov     $Tmp1, sp
 110   sub     sp, $GlobalSize
 111   ; Set all the global variables to 0
 112   mov     $GlobalSize, #0x0
 113 _InitializePrimaryStackLoop
 114   cmp     $Tmp1, sp
 115   bls     _InitializePrimaryStackEnd
 116   str     $GlobalSize, [$Tmp1], #-4
 117   b       _InitializePrimaryStackLoop
 118 _InitializePrimaryStackEnd
 119   MEND
 120
 121   END