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/config.h> |
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18 | #include <rtems/io.h> |
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19 | #include <rtems/isr.h> |
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20 | #include <rtems/thread.h> |
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21 | #include <rtems/intr.h> |
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22 | |
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23 | #include <string.h> |
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24 | |
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25 | /*PAGE |
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26 | * |
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27 | * _IO_Initialize_all_drivers |
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28 | * |
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29 | * This routine initializes all device drivers |
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30 | * |
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31 | * Input Paramters: NONE |
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32 | * |
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33 | * Output Parameters: NONE |
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34 | */ |
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35 | |
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36 | void _IO_Initialize_all_drivers( void ) |
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37 | { |
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38 | rtems_device_major_number major; |
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39 | |
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40 | for ( major=0 ; major < _IO_Number_of_drivers ; major ++ ) |
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41 | (void) rtems_io_initialize( major, 0, _Configuration_Table); |
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42 | } |
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43 | |
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44 | /*PAGE |
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45 | * |
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46 | * rtems_io_register_name |
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47 | * |
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48 | * Associate a name with a driver |
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49 | * |
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50 | * Input Paramters: |
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51 | * |
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52 | * Output Parameters: |
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53 | */ |
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54 | |
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55 | rtems_status_code rtems_io_register_name( |
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56 | char *device_name, |
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57 | rtems_device_major_number major, |
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58 | rtems_device_minor_number minor |
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59 | ) |
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60 | { |
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61 | rtems_driver_name_t *np; |
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62 | unsigned32 level; |
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63 | |
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64 | /* find an empty slot */ |
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65 | for (np = rtems_driver_name_table; np < &rtems_driver_name_table[RTEMS_MAX_DRIVER_NAMES]; np++) |
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66 | { |
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67 | rtems_interrupt_disable(level); |
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68 | if (np->device_name == 0) |
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69 | { |
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70 | np->device_name = device_name; |
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71 | np->device_name_length = strlen(device_name); |
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72 | np->major = major; |
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73 | np->minor = minor; |
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74 | rtems_interrupt_enable(level); |
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75 | |
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76 | return RTEMS_SUCCESSFUL; |
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77 | } |
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78 | rtems_interrupt_enable(level); |
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79 | } |
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80 | |
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81 | return RTEMS_TOO_MANY; |
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82 | } |
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83 | |
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84 | /*PAGE |
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85 | * |
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86 | * rtems_io_lookup_name |
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87 | * |
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88 | * Find what driver "owns" this name |
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89 | * |
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90 | * Input Paramters: |
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91 | * |
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92 | * Output Parameters: |
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93 | */ |
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94 | |
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95 | rtems_status_code rtems_io_lookup_name( |
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96 | const char *pathname, |
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97 | rtems_driver_name_t **rnp |
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98 | ) |
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99 | { |
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100 | rtems_driver_name_t *np; |
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101 | |
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102 | for (np = rtems_driver_name_table; np < &rtems_driver_name_table[RTEMS_MAX_DRIVER_NAMES]; np++) |
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103 | if (np->device_name) |
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104 | if (strncmp(np->device_name, pathname, np->device_name_length) == 0) |
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105 | { |
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106 | *rnp = np; |
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107 | return RTEMS_SUCCESSFUL; |
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108 | } |
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109 | |
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110 | *rnp = 0; |
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111 | return RTEMS_UNSATISFIED; |
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112 | } |
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113 | |
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114 | |
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115 | /*PAGE |
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116 | * |
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117 | * rtems_io_initialize |
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118 | * |
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119 | * This routine is the initialization directive of the IO manager. |
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120 | * |
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121 | * Input Paramters: |
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122 | * major - device driver number |
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123 | * minor - device number |
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124 | * argument - pointer to argument(s) |
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125 | * |
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126 | * Output Parameters: |
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127 | * returns - return code |
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128 | */ |
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129 | |
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130 | rtems_status_code rtems_io_initialize( |
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131 | rtems_device_major_number major, |
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132 | rtems_device_minor_number minor, |
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133 | void *argument |
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134 | ) |
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135 | { |
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136 | rtems_device_driver_entry callout; |
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137 | |
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138 | if ( major >= _IO_Number_of_drivers ) |
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139 | return RTEMS_INVALID_NUMBER; |
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140 | |
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141 | callout = _IO_Driver_address_table[major].initialization; |
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142 | return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL; |
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143 | } |
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144 | |
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145 | /*PAGE |
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146 | * |
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147 | * rtems_io_open |
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148 | * |
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149 | * This routine is the open directive of the IO manager. |
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150 | * |
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151 | * Input Paramters: |
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152 | * major - device driver number |
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153 | * minor - device number |
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154 | * argument - pointer to argument(s) |
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155 | * |
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156 | * Output Parameters: |
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157 | * returns - return code |
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158 | */ |
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159 | |
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160 | rtems_status_code rtems_io_open( |
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161 | rtems_device_major_number major, |
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162 | rtems_device_minor_number minor, |
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163 | void *argument |
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164 | ) |
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165 | { |
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166 | rtems_device_driver_entry callout; |
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167 | |
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168 | if ( major >= _IO_Number_of_drivers ) |
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169 | return RTEMS_INVALID_NUMBER; |
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170 | |
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171 | callout = _IO_Driver_address_table[major].open; |
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172 | return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL; |
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173 | } |
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174 | |
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175 | /*PAGE |
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176 | * |
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177 | * rtems_io_close |
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178 | * |
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179 | * This routine is the close directive of the IO manager. |
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180 | * |
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181 | * Input Paramters: |
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182 | * major - device driver number |
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183 | * minor - device number |
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184 | * argument - pointer to argument(s) |
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185 | * |
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186 | * Output Parameters: |
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187 | * returns - return code |
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188 | */ |
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189 | |
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190 | rtems_status_code rtems_io_close( |
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191 | rtems_device_major_number major, |
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192 | rtems_device_minor_number minor, |
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193 | void *argument |
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194 | ) |
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195 | { |
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196 | rtems_device_driver_entry callout; |
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197 | |
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198 | if ( major >= _IO_Number_of_drivers ) |
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199 | return RTEMS_INVALID_NUMBER; |
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200 | |
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201 | callout = _IO_Driver_address_table[major].close; |
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202 | return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL; |
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203 | } |
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204 | |
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205 | /*PAGE |
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206 | * |
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207 | * rtems_io_read |
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208 | * |
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209 | * This routine is the read directive of the IO manager. |
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210 | * |
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211 | * Input Paramters: |
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212 | * major - device driver number |
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213 | * minor - device number |
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214 | * argument - pointer to argument(s) |
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215 | * |
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216 | * Output Parameters: |
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217 | * returns - return code |
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218 | */ |
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219 | |
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220 | rtems_status_code rtems_io_read( |
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221 | rtems_device_major_number major, |
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222 | rtems_device_minor_number minor, |
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223 | void *argument |
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224 | ) |
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225 | { |
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226 | rtems_device_driver_entry callout; |
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227 | |
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228 | if ( major >= _IO_Number_of_drivers ) |
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229 | return RTEMS_INVALID_NUMBER; |
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230 | |
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231 | callout = _IO_Driver_address_table[major].read; |
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232 | return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL; |
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233 | } |
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234 | |
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235 | /*PAGE |
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236 | * |
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237 | * rtems_io_write |
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238 | * |
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239 | * This routine is the write directive of the IO manager. |
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240 | * |
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241 | * Input Paramters: |
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242 | * major - device driver number |
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243 | * minor - device number |
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244 | * argument - pointer to argument(s) |
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245 | * |
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246 | * Output Parameters: |
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247 | * returns - return code |
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248 | */ |
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249 | |
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250 | rtems_status_code rtems_io_write( |
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251 | rtems_device_major_number major, |
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252 | rtems_device_minor_number minor, |
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253 | void *argument |
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254 | ) |
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255 | { |
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256 | rtems_device_driver_entry callout; |
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257 | |
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258 | if ( major >= _IO_Number_of_drivers ) |
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259 | return RTEMS_INVALID_NUMBER; |
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260 | |
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261 | callout = _IO_Driver_address_table[major].write; |
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262 | return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL; |
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263 | } |
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264 | |
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265 | /*PAGE |
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266 | * |
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267 | * rtems_io_control |
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268 | * |
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269 | * This routine is the control directive of the IO manager. |
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270 | * |
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271 | * Input Paramters: |
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272 | * major - device driver number |
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273 | * minor - device number |
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274 | * argument - pointer to argument(s) |
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275 | * |
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276 | * Output Parameters: |
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277 | * returns - return code |
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278 | */ |
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279 | |
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280 | rtems_status_code rtems_io_control( |
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281 | rtems_device_major_number major, |
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282 | rtems_device_minor_number minor, |
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283 | void *argument |
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284 | ) |
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285 | { |
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286 | rtems_device_driver_entry callout; |
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287 | |
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288 | if ( major >= _IO_Number_of_drivers ) |
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289 | return RTEMS_INVALID_NUMBER; |
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290 | |
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291 | callout = _IO_Driver_address_table[major].control; |
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292 | return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL; |
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293 | } |
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294 | |
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