1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup rtems_interrupt_extension |
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5 | * |
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6 | * @brief Header file for the Interrupt Manager Extension. |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Based on concepts of Pavel Pisa, Till Straumann and Eric Valette. |
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11 | * |
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12 | * Copyright (c) 2008 |
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13 | * Embedded Brains GmbH |
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14 | * Obere Lagerstr. 30 |
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15 | * D-82178 Puchheim |
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16 | * Germany |
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17 | * rtems@embedded-brains.de |
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18 | * |
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19 | * The license and distribution terms for this file may be found in the file |
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20 | * LICENSE in this distribution or at http://www.rtems.com/license/LICENSE. |
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21 | */ |
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22 | |
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23 | #ifndef RTEMS_IRQ_EXTENSION_H |
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24 | #define RTEMS_IRQ_EXTENSION_H |
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25 | |
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26 | #include <rtems.h> |
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27 | |
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28 | #ifdef __cplusplus |
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29 | extern "C" { |
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30 | #endif /* __cplusplus */ |
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31 | |
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32 | /** |
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33 | * @defgroup rtems_interrupt_extension Interrupt Manager Extension |
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34 | * |
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35 | * @ingroup ClassicINTR |
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36 | * |
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37 | * In addition to the Classic API interrupt handler with a handle are |
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38 | * supported. You can also install multiple shared handler for one interrupt |
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39 | * vector. |
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40 | * |
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41 | * @{ |
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42 | */ |
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43 | |
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44 | /** |
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45 | * @brief Makes the interrupt handler unique. Prevents other handler from |
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46 | * using the same interrupt vector. |
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47 | */ |
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48 | #define RTEMS_INTERRUPT_UNIQUE ((rtems_option) 0x00000001) |
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49 | |
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50 | /** |
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51 | * @brief Allows that this interrupt handler may share a common interrupt |
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52 | * vector with other handler. |
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53 | */ |
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54 | #define RTEMS_INTERRUPT_SHARED ((rtems_option) 0x00000000) |
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55 | |
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56 | /** |
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57 | * @brief Returns true if the interrupt handler unique option is set. |
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58 | */ |
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59 | #define RTEMS_INTERRUPT_IS_UNIQUE( options) \ |
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60 | ((options) & RTEMS_INTERRUPT_UNIQUE) |
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61 | |
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62 | /** |
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63 | * @brief Returns true if the interrupt handler shared option is set. |
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64 | */ |
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65 | #define RTEMS_INTERRUPT_IS_SHARED( options) \ |
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66 | (!RTEMS_INTERRUPT_IS_UNIQUE( options)) |
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67 | |
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68 | /** |
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69 | * @brief Interrupt handler routine type. |
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70 | */ |
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71 | typedef void (*rtems_interrupt_handler)(void *); |
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72 | |
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73 | /** |
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74 | * @brief Installs the interrupt handler routine @a handler for the interrupt |
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75 | * vector with number @a vector. |
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76 | * |
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77 | * You can set one of the mutually exclusive options |
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78 | * |
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79 | * - @ref RTEMS_INTERRUPT_UNIQUE |
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80 | * - @ref RTEMS_INTERRUPT_SHARED |
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81 | * |
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82 | * with the @a options parameter for the interrupt handler. |
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83 | * |
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84 | * The handler routine shall be called with argument @a arg when dispatched. |
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85 | * The order in which the shared interrupt handlers are dispatched for one |
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86 | * vector is BSP dependent. |
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87 | * |
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88 | * If the option @ref RTEMS_INTERRUPT_UNIQUE is set then it shall be ensured |
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89 | * that this handler will be the only one for this vector. |
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90 | * |
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91 | * You can provide an informative description @a info. This may be used for |
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92 | * system debugging and status tools. The string has to be persistent during |
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93 | * the handler life time. |
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94 | * |
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95 | * This function may block. |
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96 | * |
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97 | * @retval RTEMS_SUCCESSFUL Shall be returned in case of success. |
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98 | * @retval RTEMS_CALLED_FROM_ISR If this function is called from interrupt |
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99 | * context this shall be returned. |
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100 | * @retval RTEMS_INVALID_ADDRESS If the handler address is NULL this shall be |
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101 | * returned. |
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102 | * @retval RTEMS_INVALID_ID If the vector number is out of range this shall be |
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103 | * returned. |
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104 | * @retval RTEMS_INVALID_NUMBER If an option is not applicable this shall be |
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105 | * returned. |
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106 | * @retval RTEMS_RESOURCE_IN_USE If the vector is already occupied with a |
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107 | * unique handler this shall be returned. If a unique handler should be |
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108 | * installed and there is already a handler installed this shall be returned. |
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109 | * @retval RTEMS_TOO_MANY If a handler with this argument is already installed |
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110 | * for the vector this shall be returned. |
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111 | * @retval RTEMS_IO_ERROR Reserved for board support package specific error |
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112 | * conditions. |
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113 | */ |
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114 | rtems_status_code rtems_interrupt_handler_install( |
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115 | rtems_vector_number vector, |
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116 | const char *info, |
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117 | rtems_option options, |
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118 | rtems_interrupt_handler handler, |
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119 | void *arg |
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120 | ); |
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121 | |
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122 | /** |
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123 | * @brief Removes the interrupt handler routine @a handler with argument @a arg |
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124 | * for the interrupt vector with number @a vector. |
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125 | * |
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126 | * This function may block. |
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127 | * |
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128 | * @retval RTEMS_SUCCESSFUL Shall be returned in case of success. |
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129 | * @retval RTEMS_CALLED_FROM_ISR If this function is called from interrupt |
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130 | * context this shall be returned. |
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131 | * @retval RTEMS_INVALID_ADDRESS If the handler address is NULL this shall be |
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132 | * returned. |
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133 | * @retval RTEMS_INVALID_ID If the vector number is out of range this shall be |
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134 | * returned. |
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135 | * @retval RTEMS_UNSATISFIED If the handler with its argument is not installed |
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136 | * for the vector this shall be returned. |
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137 | * @retval RTEMS_IO_ERROR Reserved for board support package specific error |
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138 | * conditions. |
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139 | */ |
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140 | rtems_status_code rtems_interrupt_handler_remove( |
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141 | rtems_vector_number vector, |
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142 | rtems_interrupt_handler handler, |
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143 | void *arg |
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144 | ); |
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145 | |
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146 | /** |
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147 | * @brief Interrupt handler iteration routine type. |
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148 | * |
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149 | * @see rtems_interrupt_handler_iterate() |
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150 | */ |
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151 | typedef void (*rtems_interrupt_per_handler_routine)( |
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152 | void *, const char *, rtems_option, rtems_interrupt_handler, void * |
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153 | ); |
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154 | |
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155 | /** |
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156 | * @brief Iterates over all installed interrupt handler of the interrupt vector |
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157 | * with number @a vector. |
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158 | * |
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159 | * For each installed handler of the vector the function @a routine will be |
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160 | * called with the supplied argument @a arg and the handler information, |
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161 | * options, routine and argument. |
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162 | * |
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163 | * This function is intended for system information and diagnostics. |
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164 | * |
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165 | * This function may block. Never install or remove an interrupt handler |
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166 | * within the iteration routine. This may result in a deadlock. |
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167 | * |
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168 | * @retval RTEMS_SUCCESSFUL Shall be returned in case of success. |
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169 | * @retval RTEMS_CALLED_FROM_ISR If this function is called from interrupt |
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170 | * context this shall be returned. |
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171 | * @retval RTEMS_INVALID_ID If the vector number is out of range this shall be |
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172 | * returned. |
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173 | * @retval RTEMS_IO_ERROR Reserved for board support package specific error |
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174 | * conditions. |
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175 | */ |
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176 | rtems_status_code rtems_interrupt_handler_iterate( |
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177 | rtems_vector_number vector, |
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178 | rtems_interrupt_per_handler_routine routine, |
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179 | void *arg |
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180 | ); |
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181 | |
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182 | /** |
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183 | * @brief Initializes an interrupt server task. |
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184 | * |
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185 | * The task will have the priority @a priority, the stack size @a stack_size, |
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186 | * the modes @a modes and the attributes @a attributes. The identifier of the |
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187 | * server task will be returned in @a server. Interrupt handlers can be |
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188 | * installed on the server with rtems_interrupt_server_handler_install() and |
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189 | * removed with rtems_interrupt_server_handler_remove() using this identifier. |
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190 | * In case of an interrupt the request will be forwarded to the server. The |
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191 | * handlers are executed within the server context. If one handler blocks on |
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192 | * something this may delay the processing of other handlers. |
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193 | * |
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194 | * The server identifier pointer @a server may be @a NULL to initialize the |
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195 | * default server. |
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196 | * |
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197 | * This function may block. |
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198 | * |
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199 | * @see rtems_task_create(). |
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200 | * |
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201 | * @retval RTEMS_SUCCESSFUL Shall be returned in case of success. |
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202 | * @retval RTEMS_INCORRECT_STATE If the default server is already initialized |
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203 | * this shall be returned. |
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204 | * @retval RTEMS_IO_ERROR Reserved for board support package specific error |
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205 | * conditions. |
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206 | */ |
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207 | rtems_status_code rtems_interrupt_server_initialize( |
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208 | rtems_task_priority priority, |
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209 | size_t stack_size, |
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210 | rtems_mode modes, |
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211 | rtems_attribute attributes, |
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212 | rtems_id *server |
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213 | ); |
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214 | |
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215 | /** |
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216 | * @brief Installs the interrupt handler routine @a handler for the interrupt |
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217 | * vector with number @a vector on the server @a server. |
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218 | * |
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219 | * The handler routine will be executed on the corresponding interrupt server |
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220 | * task. A server identifier @a server of @c RTEMS_ID_NONE may be used to |
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221 | * install the handler on the default server. |
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222 | * |
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223 | * This function may block. |
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224 | * |
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225 | * @see rtems_interrupt_handler_install(). |
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226 | * |
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227 | * @retval RTEMS_SUCCESSFUL Shall be returned in case of success. |
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228 | * @retval RTEMS_INCORRECT_STATE If the interrupt handler server is not |
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229 | * initialized this shall be returned. |
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230 | * @retval * For other errors see rtems_interrupt_handler_install(). |
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231 | */ |
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232 | rtems_status_code rtems_interrupt_server_handler_install( |
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233 | rtems_id server, |
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234 | rtems_vector_number vector, |
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235 | const char *info, |
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236 | rtems_option options, |
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237 | rtems_interrupt_handler handler, |
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238 | void *arg |
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239 | ); |
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240 | |
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241 | /** |
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242 | * @brief Removes the interrupt handler routine @a handler with argument @a arg |
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243 | * for the interrupt vector with number @a vector from the server @a server. |
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244 | * |
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245 | * A server identifier @a server of @c RTEMS_ID_NONE may be used to remove the |
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246 | * handler from the default server. |
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247 | * |
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248 | * This function may block. |
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249 | * |
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250 | * @see rtems_interrupt_handler_remove(). |
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251 | * |
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252 | * @retval RTEMS_SUCCESSFUL Shall be returned in case of success. |
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253 | * @retval RTEMS_INCORRECT_STATE If the interrupt handler server is not |
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254 | * initialized this shall be returned. |
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255 | * @retval * For other errors see rtems_interrupt_handler_remove(). |
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256 | */ |
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257 | rtems_status_code rtems_interrupt_server_handler_remove( |
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258 | rtems_id server, |
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259 | rtems_vector_number vector, |
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260 | rtems_interrupt_handler handler, |
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261 | void *arg |
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262 | ); |
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263 | |
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264 | /** @} */ |
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265 | |
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266 | #ifdef __cplusplus |
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267 | } |
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268 | #endif /* __cplusplus */ |
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269 | |
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270 | #endif /* RTEMS_IRQ_EXTENSION_H */ |
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