[ac7d5ef0] | 1 | /* |
---|
| 2 | * Input/Output Manager |
---|
| 3 | * |
---|
| 4 | * |
---|
| 5 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
---|
| 6 | * On-Line Applications Research Corporation (OAR). |
---|
| 7 | * All rights assigned to U.S. Government, 1994. |
---|
| 8 | * |
---|
| 9 | * This material may be reproduced by or for the U.S. Government pursuant |
---|
| 10 | * to the copyright license under the clause at DFARS 252.227-7013. This |
---|
| 11 | * notice must appear in all copies of this file and its derivatives. |
---|
| 12 | * |
---|
| 13 | * $Id$ |
---|
| 14 | */ |
---|
| 15 | |
---|
| 16 | #include <rtems/system.h> |
---|
| 17 | #include <rtems/config.h> |
---|
| 18 | #include <rtems/io.h> |
---|
| 19 | #include <rtems/isr.h> |
---|
| 20 | #include <rtems/thread.h> |
---|
| 21 | |
---|
| 22 | /*PAGE |
---|
| 23 | * |
---|
| 24 | * _IO_Initialize_all_drivers |
---|
| 25 | * |
---|
| 26 | * This routine initializes all device drivers |
---|
| 27 | * |
---|
| 28 | * Input Paramters: NONE |
---|
| 29 | * |
---|
| 30 | * Output Parameters: NONE |
---|
| 31 | */ |
---|
| 32 | |
---|
| 33 | void _IO_Initialize_all_drivers( void ) |
---|
| 34 | { |
---|
| 35 | rtems_device_major_number major; |
---|
| 36 | unsigned32 ignored; |
---|
| 37 | |
---|
| 38 | for ( major=0 ; major < _IO_Number_of_drivers ; major ++ ) |
---|
| 39 | (void) rtems_io_initialize( major, 0, _Configuration_Table, &ignored ); |
---|
| 40 | } |
---|
| 41 | |
---|
| 42 | /*PAGE |
---|
| 43 | * |
---|
| 44 | * rtems_io_initialize |
---|
| 45 | * |
---|
| 46 | * This routine is the initialization directive of the IO manager. |
---|
| 47 | * |
---|
| 48 | * Input Paramters: |
---|
| 49 | * major - device driver number |
---|
| 50 | * minor - device number |
---|
| 51 | * argument - pointer to argument(s) |
---|
| 52 | * return_value - pointer to driver's return value |
---|
| 53 | * |
---|
| 54 | * Output Parameters: |
---|
| 55 | * returns - return code |
---|
| 56 | * *return_value - driver's return code |
---|
| 57 | */ |
---|
| 58 | |
---|
| 59 | rtems_status_code rtems_io_initialize( |
---|
| 60 | rtems_device_major_number major, |
---|
| 61 | rtems_device_minor_number minor, |
---|
| 62 | void *argument, |
---|
| 63 | unsigned32 *return_value |
---|
| 64 | ) |
---|
| 65 | { |
---|
| 66 | return _IO_Handler_routine( |
---|
| 67 | IO_INITIALIZE_OPERATION, |
---|
| 68 | major, |
---|
| 69 | minor, |
---|
| 70 | argument, |
---|
| 71 | return_value |
---|
| 72 | ); |
---|
| 73 | } |
---|
| 74 | |
---|
| 75 | /*PAGE |
---|
| 76 | * |
---|
| 77 | * rtems_io_open |
---|
| 78 | * |
---|
| 79 | * This routine is the open directive of the IO manager. |
---|
| 80 | * |
---|
| 81 | * Input Paramters: |
---|
| 82 | * major - device driver number |
---|
| 83 | * minor - device number |
---|
| 84 | * argument - pointer to argument(s) |
---|
| 85 | * return_value - pointer to driver's return value |
---|
| 86 | * |
---|
| 87 | * Output Parameters: |
---|
| 88 | * returns - return code |
---|
| 89 | * *return_value - driver's return code |
---|
| 90 | */ |
---|
| 91 | |
---|
| 92 | rtems_status_code rtems_io_open( |
---|
| 93 | rtems_device_major_number major, |
---|
| 94 | rtems_device_minor_number minor, |
---|
| 95 | void *argument, |
---|
| 96 | unsigned32 *return_value |
---|
| 97 | ) |
---|
| 98 | { |
---|
| 99 | return _IO_Handler_routine( |
---|
| 100 | IO_OPEN_OPERATION, |
---|
| 101 | major, |
---|
| 102 | minor, |
---|
| 103 | argument, |
---|
| 104 | return_value |
---|
| 105 | ); |
---|
| 106 | } |
---|
| 107 | |
---|
| 108 | /*PAGE |
---|
| 109 | * |
---|
| 110 | * rtems_io_close |
---|
| 111 | * |
---|
| 112 | * This routine is the close directive of the IO manager. |
---|
| 113 | * |
---|
| 114 | * Input Paramters: |
---|
| 115 | * major - device driver number |
---|
| 116 | * minor - device number |
---|
| 117 | * argument - pointer to argument(s) |
---|
| 118 | * return_value - pointer to driver's return value |
---|
| 119 | * |
---|
| 120 | * Output Parameters: |
---|
| 121 | * returns - return code |
---|
| 122 | * *return_value - driver's return code |
---|
| 123 | */ |
---|
| 124 | |
---|
| 125 | rtems_status_code rtems_io_close( |
---|
| 126 | rtems_device_major_number major, |
---|
| 127 | rtems_device_minor_number minor, |
---|
| 128 | void *argument, |
---|
| 129 | unsigned32 *return_value |
---|
| 130 | ) |
---|
| 131 | { |
---|
| 132 | return _IO_Handler_routine( |
---|
| 133 | IO_CLOSE_OPERATION, |
---|
| 134 | major, |
---|
| 135 | minor, |
---|
| 136 | argument, |
---|
| 137 | return_value |
---|
| 138 | ); |
---|
| 139 | } |
---|
| 140 | |
---|
| 141 | /*PAGE |
---|
| 142 | * |
---|
| 143 | * rtems_io_read |
---|
| 144 | * |
---|
| 145 | * This routine is the read directive of the IO manager. |
---|
| 146 | * |
---|
| 147 | * Input Paramters: |
---|
| 148 | * major - device driver number |
---|
| 149 | * minor - device number |
---|
| 150 | * argument - pointer to argument(s) |
---|
| 151 | * return_value - pointer to driver's return value |
---|
| 152 | * |
---|
| 153 | * Output Parameters: |
---|
| 154 | * returns - return code |
---|
| 155 | * *return_value - driver's return code |
---|
| 156 | */ |
---|
| 157 | |
---|
| 158 | rtems_status_code rtems_io_read( |
---|
| 159 | rtems_device_major_number major, |
---|
| 160 | rtems_device_minor_number minor, |
---|
| 161 | void *argument, |
---|
| 162 | unsigned32 *return_value |
---|
| 163 | ) |
---|
| 164 | { |
---|
| 165 | return _IO_Handler_routine( |
---|
| 166 | IO_READ_OPERATION, |
---|
| 167 | major, |
---|
| 168 | minor, |
---|
| 169 | argument, |
---|
| 170 | return_value |
---|
| 171 | ); |
---|
| 172 | } |
---|
| 173 | |
---|
| 174 | /*PAGE |
---|
| 175 | * |
---|
| 176 | * rtems_io_write |
---|
| 177 | * |
---|
| 178 | * This routine is the write directive of the IO manager. |
---|
| 179 | * |
---|
| 180 | * Input Paramters: |
---|
| 181 | * major - device driver number |
---|
| 182 | * minor - device number |
---|
| 183 | * argument - pointer to argument(s) |
---|
| 184 | * return_value - pointer to driver's return value |
---|
| 185 | * |
---|
| 186 | * Output Parameters: |
---|
| 187 | * returns - return code |
---|
| 188 | * *return_value - driver's return code |
---|
| 189 | */ |
---|
| 190 | |
---|
| 191 | rtems_status_code rtems_io_write( |
---|
| 192 | rtems_device_major_number major, |
---|
| 193 | rtems_device_minor_number minor, |
---|
| 194 | void *argument, |
---|
| 195 | unsigned32 *return_value |
---|
| 196 | ) |
---|
| 197 | { |
---|
| 198 | return _IO_Handler_routine( |
---|
| 199 | IO_WRITE_OPERATION, |
---|
| 200 | major, |
---|
| 201 | minor, |
---|
| 202 | argument, |
---|
| 203 | return_value |
---|
| 204 | ); |
---|
| 205 | } |
---|
| 206 | |
---|
| 207 | /*PAGE |
---|
| 208 | * |
---|
| 209 | * rtems_io_control |
---|
| 210 | * |
---|
| 211 | * This routine is the control directive of the IO manager. |
---|
| 212 | * |
---|
| 213 | * Input Paramters: |
---|
| 214 | * major - device driver number |
---|
| 215 | * minor - device number |
---|
| 216 | * argument - pointer to argument(s) |
---|
| 217 | * return_value - pointer to driver's return value |
---|
| 218 | * |
---|
| 219 | * Output Parameters: |
---|
| 220 | * returns - return code |
---|
| 221 | * *return_value - driver's return code |
---|
| 222 | */ |
---|
| 223 | |
---|
| 224 | rtems_status_code rtems_io_control( |
---|
| 225 | rtems_device_major_number major, |
---|
| 226 | rtems_device_minor_number minor, |
---|
| 227 | void *argument, |
---|
| 228 | unsigned32 *return_value |
---|
| 229 | ) |
---|
| 230 | { |
---|
| 231 | return _IO_Handler_routine( |
---|
| 232 | IO_CONTROL_OPERATION, |
---|
| 233 | major, |
---|
| 234 | minor, |
---|
| 235 | argument, |
---|
| 236 | return_value |
---|
| 237 | ); |
---|
| 238 | } |
---|
| 239 | |
---|
| 240 | /*PAGE |
---|
| 241 | * |
---|
| 242 | * _IO_Handler_routine |
---|
| 243 | * |
---|
| 244 | * This routine implements all IO manager directives. |
---|
| 245 | * |
---|
| 246 | * Input Paramters: |
---|
| 247 | * operation - I/O operation to be performed |
---|
| 248 | * major - device driver number |
---|
| 249 | * minor - device number |
---|
| 250 | * argument - pointer to argument(s) |
---|
| 251 | * return_value - pointer to driver's return value |
---|
| 252 | * |
---|
| 253 | * Output Parameters: |
---|
| 254 | * returns - return code |
---|
| 255 | * *return_value - driver's return code |
---|
| 256 | */ |
---|
| 257 | |
---|
| 258 | rtems_status_code _IO_Handler_routine( |
---|
| 259 | IO_operations operation, |
---|
| 260 | rtems_device_major_number major, |
---|
| 261 | rtems_device_minor_number minor, |
---|
| 262 | void *argument, |
---|
| 263 | unsigned32 *return_value |
---|
| 264 | ) |
---|
| 265 | { |
---|
| 266 | rtems_device_driver_entry io_callout; |
---|
| 267 | |
---|
| 268 | /* |
---|
| 269 | * NOTE: There is no range checking as in Ada because: |
---|
| 270 | * + arrays in Ada are not always zero based. |
---|
| 271 | * + with zero based arrays, a comparison of an unsigned |
---|
| 272 | * number being less than zero would be necessary to |
---|
| 273 | * check it as a range. This would cause a warning for |
---|
| 274 | * checking an unsigned number for being negative. |
---|
| 275 | */ |
---|
| 276 | |
---|
| 277 | if ( major >= _IO_Number_of_drivers ) |
---|
| 278 | return ( RTEMS_INVALID_NUMBER ); |
---|
| 279 | |
---|
| 280 | switch ( operation ) { |
---|
| 281 | case IO_INITIALIZE_OPERATION: |
---|
| 282 | io_callout = _IO_Driver_address_table[ major ].initialization; |
---|
| 283 | break; |
---|
| 284 | case IO_OPEN_OPERATION: |
---|
| 285 | io_callout = _IO_Driver_address_table[ major ].open; |
---|
| 286 | break; |
---|
| 287 | case IO_CLOSE_OPERATION: |
---|
| 288 | io_callout = _IO_Driver_address_table[ major ].close; |
---|
| 289 | break; |
---|
| 290 | case IO_READ_OPERATION: |
---|
| 291 | io_callout = _IO_Driver_address_table[ major ].read; |
---|
| 292 | break; |
---|
| 293 | case IO_WRITE_OPERATION: |
---|
| 294 | io_callout = _IO_Driver_address_table[ major ].write; |
---|
| 295 | break; |
---|
| 296 | case IO_CONTROL_OPERATION: |
---|
| 297 | io_callout = _IO_Driver_address_table[ major ].control; |
---|
| 298 | break; |
---|
| 299 | default: /* unreached -- only to remove warnings */ |
---|
| 300 | io_callout = NULL; |
---|
| 301 | break; |
---|
| 302 | } |
---|
| 303 | |
---|
| 304 | if ( io_callout != NULL ) |
---|
| 305 | (*io_callout)( |
---|
| 306 | major, |
---|
| 307 | minor, |
---|
| 308 | argument, |
---|
| 309 | _Thread_Executing->Object.id, |
---|
| 310 | return_value |
---|
| 311 | ); |
---|
| 312 | else |
---|
| 313 | *return_value = 0; |
---|
| 314 | |
---|
| 315 | return( RTEMS_SUCCESSFUL ); |
---|
| 316 | } |
---|