1 | /* |
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2 | * Input/Output Manager |
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3 | * |
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4 | * |
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5 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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6 | * On-Line Applications Research Corporation (OAR). |
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7 | * All rights assigned to U.S. Government, 1994. |
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8 | * |
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9 | * This material may be reproduced by or for the U.S. Government pursuant |
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10 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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11 | * notice must appear in all copies of this file and its derivatives. |
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12 | * |
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13 | * $Id$ |
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14 | */ |
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15 | |
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16 | #include <rtems/system.h> |
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17 | #include <rtems/io.h> |
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18 | #include <rtems/score/isr.h> |
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19 | #include <rtems/score/thread.h> |
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20 | |
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21 | #include <string.h> |
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22 | |
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23 | /*PAGE |
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24 | * |
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25 | * _IO_Initialize_all_drivers |
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26 | * |
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27 | * This routine initializes all device drivers |
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28 | * |
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29 | * Input Paramters: NONE |
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30 | * |
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31 | * Output Parameters: NONE |
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32 | */ |
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33 | |
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34 | void _IO_Initialize_all_drivers( void ) |
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35 | { |
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36 | rtems_device_major_number major; |
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37 | |
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38 | for ( major=0 ; major < _IO_Number_of_drivers ; major ++ ) |
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39 | (void) rtems_io_initialize( major, 0, NULL); |
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40 | } |
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41 | |
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42 | /*PAGE |
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43 | * |
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44 | * rtems_io_register_name |
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45 | * |
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46 | * Associate a name with a driver |
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47 | * |
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48 | * Input Paramters: |
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49 | * device_name - pointer to name string to associate with device |
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50 | * major - device major number to receive name |
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51 | * minor - device minor number to receive name |
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52 | * |
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53 | * Output Parameters: |
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54 | * RTEMS_SUCCESSFUL - if successful |
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55 | * error code - if unsuccessful |
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56 | */ |
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57 | |
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58 | rtems_status_code rtems_io_register_name( |
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59 | char *device_name, |
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60 | rtems_device_major_number major, |
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61 | rtems_device_minor_number minor |
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62 | ) |
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63 | { |
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64 | rtems_driver_name_t *np; |
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65 | unsigned32 level; |
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66 | unsigned32 index; |
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67 | |
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68 | /* find an empty slot */ |
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69 | for( index=0, np = _IO_Driver_name_table ; |
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70 | index < _IO_Number_of_devices ; |
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71 | index++, np++ ) |
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72 | { |
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73 | |
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74 | _ISR_Disable(level); |
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75 | if (np->device_name == 0) |
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76 | { |
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77 | np->device_name = device_name; |
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78 | np->device_name_length = strlen(device_name); |
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79 | np->major = major; |
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80 | np->minor = minor; |
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81 | _ISR_Enable(level); |
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82 | |
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83 | return RTEMS_SUCCESSFUL; |
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84 | } |
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85 | _ISR_Enable(level); |
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86 | } |
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87 | |
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88 | return RTEMS_TOO_MANY; |
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89 | } |
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90 | |
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91 | /*PAGE |
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92 | * |
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93 | * rtems_io_lookup_name |
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94 | * |
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95 | * Find what driver "owns" this name |
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96 | * |
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97 | * Input Paramters: |
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98 | * name - name to lookup the associated device |
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99 | * |
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100 | * Output Parameters: |
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101 | * device_info - device associate with name |
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102 | * RTEMS_SUCCESSFUL - if successful |
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103 | * error code - if unsuccessful |
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104 | */ |
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105 | |
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106 | rtems_status_code rtems_io_lookup_name( |
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107 | const char *name, |
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108 | rtems_driver_name_t **device_info |
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109 | ) |
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110 | { |
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111 | rtems_driver_name_t *np; |
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112 | unsigned32 index; |
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113 | |
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114 | for( index=0, np = _IO_Driver_name_table ; |
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115 | index < _IO_Number_of_devices ; |
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116 | index++, np++ ) |
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117 | if (np->device_name) |
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118 | if (strncmp(np->device_name, name, np->device_name_length) == 0) |
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119 | { |
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120 | *device_info = np; |
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121 | return RTEMS_SUCCESSFUL; |
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122 | } |
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123 | |
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124 | *device_info = 0; |
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125 | return RTEMS_UNSATISFIED; |
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126 | } |
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127 | |
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128 | |
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129 | /*PAGE |
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130 | * |
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131 | * rtems_io_initialize |
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132 | * |
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133 | * This routine is the initialization directive of the IO manager. |
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134 | * |
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135 | * Input Paramters: |
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136 | * major - device driver number |
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137 | * minor - device number |
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138 | * argument - pointer to argument(s) |
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139 | * |
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140 | * Output Parameters: |
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141 | * returns - return code |
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142 | */ |
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143 | |
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144 | rtems_status_code rtems_io_initialize( |
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145 | rtems_device_major_number major, |
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146 | rtems_device_minor_number minor, |
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147 | void *argument |
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148 | ) |
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149 | { |
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150 | rtems_device_driver_entry callout; |
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151 | |
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152 | if ( major >= _IO_Number_of_drivers ) |
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153 | return RTEMS_INVALID_NUMBER; |
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154 | |
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155 | callout = _IO_Driver_address_table[major].initialization; |
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156 | return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL; |
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157 | } |
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158 | |
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159 | /*PAGE |
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160 | * |
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161 | * rtems_io_open |
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162 | * |
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163 | * This routine is the open directive of the IO manager. |
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164 | * |
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165 | * Input Paramters: |
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166 | * major - device driver number |
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167 | * minor - device number |
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168 | * argument - pointer to argument(s) |
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169 | * |
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170 | * Output Parameters: |
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171 | * returns - return code |
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172 | */ |
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173 | |
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174 | rtems_status_code rtems_io_open( |
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175 | rtems_device_major_number major, |
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176 | rtems_device_minor_number minor, |
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177 | void *argument |
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178 | ) |
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179 | { |
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180 | rtems_device_driver_entry callout; |
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181 | |
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182 | if ( major >= _IO_Number_of_drivers ) |
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183 | return RTEMS_INVALID_NUMBER; |
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184 | |
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185 | callout = _IO_Driver_address_table[major].open; |
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186 | return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL; |
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187 | } |
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188 | |
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189 | /*PAGE |
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190 | * |
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191 | * rtems_io_close |
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192 | * |
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193 | * This routine is the close directive of the IO manager. |
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194 | * |
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195 | * Input Paramters: |
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196 | * major - device driver number |
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197 | * minor - device number |
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198 | * argument - pointer to argument(s) |
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199 | * |
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200 | * Output Parameters: |
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201 | * returns - return code |
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202 | */ |
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203 | |
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204 | rtems_status_code rtems_io_close( |
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205 | rtems_device_major_number major, |
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206 | rtems_device_minor_number minor, |
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207 | void *argument |
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208 | ) |
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209 | { |
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210 | rtems_device_driver_entry callout; |
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211 | |
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212 | if ( major >= _IO_Number_of_drivers ) |
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213 | return RTEMS_INVALID_NUMBER; |
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214 | |
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215 | callout = _IO_Driver_address_table[major].close; |
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216 | return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL; |
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217 | } |
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218 | |
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219 | /*PAGE |
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220 | * |
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221 | * rtems_io_read |
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222 | * |
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223 | * This routine is the read directive of the IO manager. |
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224 | * |
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225 | * Input Paramters: |
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226 | * major - device driver number |
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227 | * minor - device number |
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228 | * argument - pointer to argument(s) |
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229 | * |
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230 | * Output Parameters: |
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231 | * returns - return code |
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232 | */ |
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233 | |
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234 | rtems_status_code rtems_io_read( |
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235 | rtems_device_major_number major, |
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236 | rtems_device_minor_number minor, |
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237 | void *argument |
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238 | ) |
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239 | { |
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240 | rtems_device_driver_entry callout; |
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241 | |
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242 | if ( major >= _IO_Number_of_drivers ) |
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243 | return RTEMS_INVALID_NUMBER; |
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244 | |
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245 | callout = _IO_Driver_address_table[major].read; |
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246 | return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL; |
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247 | } |
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248 | |
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249 | /*PAGE |
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250 | * |
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251 | * rtems_io_write |
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252 | * |
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253 | * This routine is the write directive of the IO manager. |
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254 | * |
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255 | * Input Paramters: |
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256 | * major - device driver number |
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257 | * minor - device number |
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258 | * argument - pointer to argument(s) |
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259 | * |
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260 | * Output Parameters: |
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261 | * returns - return code |
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262 | */ |
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263 | |
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264 | rtems_status_code rtems_io_write( |
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265 | rtems_device_major_number major, |
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266 | rtems_device_minor_number minor, |
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267 | void *argument |
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268 | ) |
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269 | { |
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270 | rtems_device_driver_entry callout; |
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271 | |
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272 | if ( major >= _IO_Number_of_drivers ) |
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273 | return RTEMS_INVALID_NUMBER; |
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274 | |
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275 | callout = _IO_Driver_address_table[major].write; |
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276 | return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL; |
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277 | } |
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278 | |
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279 | /*PAGE |
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280 | * |
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281 | * rtems_io_control |
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282 | * |
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283 | * This routine is the control directive of the IO manager. |
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284 | * |
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285 | * Input Paramters: |
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286 | * major - device driver number |
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287 | * minor - device number |
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288 | * argument - pointer to argument(s) |
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289 | * |
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290 | * Output Parameters: |
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291 | * returns - return code |
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292 | */ |
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293 | |
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294 | rtems_status_code rtems_io_control( |
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295 | rtems_device_major_number major, |
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296 | rtems_device_minor_number minor, |
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297 | void *argument |
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298 | ) |
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299 | { |
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300 | rtems_device_driver_entry callout; |
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301 | |
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302 | if ( major >= _IO_Number_of_drivers ) |
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303 | return RTEMS_INVALID_NUMBER; |
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304 | |
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305 | callout = _IO_Driver_address_table[major].control; |
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306 | return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL; |
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307 | } |
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308 | |
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