1 | -- RTEMS / Body |
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2 | -- |
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3 | -- DESCRIPTION: |
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4 | -- |
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5 | -- This package provides the interface to the RTEMS API. |
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6 | -- |
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7 | -- |
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8 | -- DEPENDENCIES: |
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9 | -- |
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10 | -- |
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11 | -- |
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12 | -- COPYRIGHT (c) 1997-2011. |
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13 | -- On-Line Applications Research Corporation (OAR). |
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14 | -- |
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15 | -- The license and distribution terms for this file may in |
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16 | -- the file LICENSE in this distribution or at |
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17 | -- http://www.rtems.com/license/LICENSE. |
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18 | -- |
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19 | |
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20 | with Ada; |
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21 | with Ada.Unchecked_Conversion; |
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22 | with Interfaces; use Interfaces; |
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23 | with Interfaces.C; use Interfaces.C; |
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24 | |
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25 | package body RTEMS is |
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26 | |
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27 | -- |
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28 | -- Utility Functions |
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29 | -- |
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30 | |
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31 | function From_Ada_Boolean |
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32 | (Ada_Boolean : Standard.Boolean) |
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33 | return RTEMS.Boolean |
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34 | is |
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35 | begin |
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36 | |
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37 | if Ada_Boolean then |
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38 | return RTEMS.True; |
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39 | end if; |
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40 | |
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41 | return RTEMS.False; |
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42 | |
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43 | end From_Ada_Boolean; |
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44 | |
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45 | function To_Ada_Boolean |
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46 | (RTEMS_Boolean : RTEMS.Boolean) |
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47 | return Standard.Boolean |
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48 | is |
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49 | begin |
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50 | |
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51 | if RTEMS_Boolean = RTEMS.True then |
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52 | return Standard.True; |
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53 | end if; |
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54 | |
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55 | return Standard.False; |
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56 | |
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57 | end To_Ada_Boolean; |
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58 | |
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59 | function Milliseconds_To_Microseconds |
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60 | (Milliseconds : RTEMS.Unsigned32) |
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61 | return RTEMS.Unsigned32 |
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62 | is |
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63 | begin |
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64 | |
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65 | return Milliseconds * 1000; |
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66 | |
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67 | end Milliseconds_To_Microseconds; |
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68 | |
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69 | function Microseconds_To_Ticks |
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70 | (Microseconds : RTEMS.Unsigned32) |
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71 | return RTEMS.Interval |
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72 | is |
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73 | function Microseconds_Per_Tick return RTEMS.Unsigned32; |
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74 | pragma Import (C, Microseconds_Per_Tick, "_ada_microseconds_per_tick"); |
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75 | begin |
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76 | |
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77 | return Microseconds / Microseconds_Per_Tick; |
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78 | |
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79 | end Microseconds_To_Ticks; |
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80 | |
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81 | function Milliseconds_To_Ticks |
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82 | (Milliseconds : RTEMS.Unsigned32) |
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83 | return RTEMS.Interval |
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84 | is |
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85 | begin |
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86 | |
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87 | return Microseconds_To_Ticks |
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88 | (Milliseconds_To_Microseconds (Milliseconds)); |
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89 | |
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90 | end Milliseconds_To_Ticks; |
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91 | |
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92 | procedure Name_To_Characters |
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93 | (Name : in RTEMS.Name; |
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94 | C1 : out Character; |
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95 | C2 : out Character; |
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96 | C3 : out Character; |
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97 | C4 : out Character) |
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98 | is |
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99 | C1_Value : RTEMS.Unsigned32; |
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100 | C2_Value : RTEMS.Unsigned32; |
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101 | C3_Value : RTEMS.Unsigned32; |
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102 | C4_Value : RTEMS.Unsigned32; |
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103 | begin |
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104 | |
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105 | C1_Value := Interfaces.Shift_Right (Name, 24); |
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106 | C2_Value := Interfaces.Shift_Right (Name, 16); |
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107 | C3_Value := Interfaces.Shift_Right (Name, 8); |
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108 | C4_Value := Name; |
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109 | |
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110 | C1_Value := C1_Value and 16#00FF#; |
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111 | C2_Value := C2_Value and 16#00FF#; |
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112 | C3_Value := C3_Value and 16#00FF#; |
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113 | C4_Value := C4_Value and 16#00FF#; |
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114 | |
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115 | C1 := Character'Val (C1_Value); |
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116 | C2 := Character'Val (C2_Value); |
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117 | C3 := Character'Val (C3_Value); |
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118 | C4 := Character'Val (C4_Value); |
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119 | |
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120 | end Name_To_Characters; |
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121 | |
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122 | function Get_Node (ID : in RTEMS.ID) return RTEMS.Unsigned32 is |
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123 | begin |
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124 | |
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125 | -- May not be right |
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126 | return Interfaces.Shift_Right (ID, 16); |
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127 | |
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128 | end Get_Node; |
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129 | |
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130 | function Get_Index (ID : in RTEMS.ID) return RTEMS.Unsigned32 is |
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131 | begin |
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132 | |
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133 | -- May not be right |
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134 | return ID and 16#FFFF#; |
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135 | |
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136 | end Get_Index; |
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137 | |
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138 | function Are_Statuses_Equal |
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139 | (Status : in RTEMS.Status_Codes; |
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140 | Desired : in RTEMS.Status_Codes) |
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141 | return Standard.Boolean |
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142 | is |
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143 | begin |
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144 | |
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145 | if Status = Desired then |
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146 | return Standard.True; |
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147 | end if; |
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148 | |
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149 | return Standard.False; |
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150 | |
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151 | end Are_Statuses_Equal; |
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152 | |
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153 | function Is_Status_Successful |
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154 | (Status : in RTEMS.Status_Codes) |
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155 | return Standard.Boolean |
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156 | is |
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157 | begin |
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158 | |
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159 | if Status = RTEMS.Successful then |
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160 | return Standard.True; |
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161 | end if; |
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162 | |
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163 | return Standard.False; |
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164 | |
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165 | end Is_Status_Successful; |
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166 | |
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167 | function Subtract |
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168 | (Left : in RTEMS.Address; |
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169 | Right : in RTEMS.Address) |
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170 | return RTEMS.Unsigned32 |
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171 | is |
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172 | function To_Unsigned32 is new Ada.Unchecked_Conversion ( |
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173 | System.Address, |
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174 | RTEMS.Unsigned32); |
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175 | |
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176 | begin |
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177 | return To_Unsigned32 (Left) - To_Unsigned32 (Right); |
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178 | end Subtract; |
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179 | |
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180 | function Are_Equal |
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181 | (Left : in RTEMS.Address; |
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182 | Right : in RTEMS.Address) |
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183 | return Standard.Boolean |
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184 | is |
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185 | function To_Unsigned32 is new Ada.Unchecked_Conversion ( |
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186 | System.Address, |
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187 | RTEMS.Unsigned32); |
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188 | |
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189 | begin |
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190 | return (To_Unsigned32 (Left) = To_Unsigned32 (Right)); |
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191 | end Are_Equal; |
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192 | |
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193 | -- |
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194 | -- |
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195 | -- RTEMS API |
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196 | -- |
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197 | |
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198 | function Build_Name ( |
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199 | C1 : in Character; |
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200 | C2 : in Character; |
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201 | C3 : in Character; |
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202 | C4 : in Character |
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203 | ) return RTEMS.Name is |
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204 | C1_Value : RTEMS.Unsigned32; |
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205 | C2_Value : RTEMS.Unsigned32; |
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206 | C3_Value : RTEMS.Unsigned32; |
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207 | C4_Value : RTEMS.Unsigned32; |
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208 | begin |
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209 | |
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210 | C1_Value := Character'Pos( C1 ); |
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211 | C2_Value := Character'Pos( C2 ); |
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212 | C3_Value := Character'Pos( C3 ); |
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213 | C4_Value := Character'Pos( C4 ); |
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214 | |
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215 | return Interfaces.Shift_Left( C1_Value, 24 ) or |
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216 | Interfaces.Shift_Left( C2_Value, 16 ) or |
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217 | Interfaces.Shift_Left( C3_Value, 8 ) or |
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218 | C4_Value; |
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219 | |
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220 | end Build_Name; |
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221 | |
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222 | -- |
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223 | -- Initialization Manager -- Shutdown Only |
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224 | -- |
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225 | procedure Shutdown_Executive (Status : in RTEMS.Unsigned32) is |
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226 | procedure Shutdown_Executive_Base (Status : RTEMS.Unsigned32); |
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227 | pragma Import (C, Shutdown_Executive_Base, "rtems_shutdown_executive"); |
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228 | begin |
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229 | Shutdown_Executive_Base (Status); |
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230 | end Shutdown_Executive; |
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231 | |
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232 | end RTEMS; |
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