1 | /** |
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2 | * @file rtems/rtems/intr.h |
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3 | * |
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4 | * @brief Header file for the Interrupt Manager. |
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5 | * |
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6 | * This include file contains all the constants and structures associated with |
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7 | * the Interrupt Manager. |
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8 | */ |
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9 | |
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10 | /* COPYRIGHT (c) 1989-2008. |
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11 | * On-Line Applications Research Corporation (OAR). |
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12 | * |
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13 | * The license and distribution terms for this file may be |
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14 | * found in the file LICENSE in this distribution or at |
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15 | * http://www.rtems.com/license/LICENSE. |
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16 | * |
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17 | * $Id$ |
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18 | */ |
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19 | |
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20 | #ifndef _RTEMS_RTEMS_INTR_H |
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21 | #define _RTEMS_RTEMS_INTR_H |
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22 | |
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23 | #ifdef __cplusplus |
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24 | extern "C" { |
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25 | #endif |
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26 | |
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27 | #include <rtems/score/isr.h> |
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28 | |
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29 | /** |
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30 | * @defgroup ClassicINTR Interrupts |
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31 | * |
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32 | * @ingroup ClassicRTEMS |
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33 | * |
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34 | * This encapsulates functionality which XXX |
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35 | */ |
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36 | /**@{*/ |
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37 | |
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38 | /** |
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39 | * @brief Interrupt level type. |
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40 | */ |
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41 | typedef ISR_Level rtems_interrupt_level; |
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42 | |
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43 | /** |
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44 | * @brief Control block type used to manage the vectors. |
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45 | */ |
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46 | typedef ISR_Vector_number rtems_vector_number; |
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47 | |
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48 | /** |
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49 | * @brief Return type for interrupt handler. |
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50 | */ |
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51 | typedef void rtems_isr; |
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52 | |
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53 | /** |
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54 | * @brief Interrupt handler type. |
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55 | * |
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56 | * @see rtems_interrupt_catch() |
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57 | */ |
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58 | typedef rtems_isr ( *rtems_isr_entry )( |
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59 | rtems_vector_number |
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60 | ); |
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61 | |
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62 | #if (CPU_SIMPLE_VECTORED_INTERRUPTS == TRUE) |
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63 | /** |
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64 | * @brief Implementation of the rtems_interrupt_catch directive. |
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65 | * |
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66 | * This directive installs @a new_isr_handler as the RTEMS interrupt service |
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67 | * routine for the interrupt vector with number @a vector. The previous RTEMS |
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68 | * interrupt service routine is returned in @a old_isr_handler. |
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69 | */ |
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70 | rtems_status_code rtems_interrupt_catch( |
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71 | rtems_isr_entry new_isr_handler, |
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72 | rtems_vector_number vector, |
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73 | rtems_isr_entry *old_isr_handler |
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74 | ); |
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75 | #endif |
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76 | |
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77 | /** |
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78 | * @brief Disables all maskable interrupts and returns the previous level in |
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79 | * @a _isr_cookie. |
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80 | * |
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81 | * @note The interrupt level shall be of type @ref rtems_interrupt_level. |
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82 | */ |
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83 | #define rtems_interrupt_disable( _isr_cookie ) \ |
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84 | _ISR_Disable(_isr_cookie) |
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85 | |
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86 | /** |
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87 | * @brief Enables maskable interrupts to the level indicated by @a |
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88 | * _isr_cookie. |
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89 | * |
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90 | * @note The interrupt level shall be of type @ref rtems_interrupt_level. |
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91 | */ |
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92 | #define rtems_interrupt_enable( _isr_cookie ) \ |
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93 | _ISR_Enable(_isr_cookie) |
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94 | |
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95 | /** |
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96 | * @brief Temporarily enables maskable interrupts to the level in @a |
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97 | * _isr_cookie before redisabling them. |
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98 | * |
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99 | * @note The interrupt level shall be of type @ref rtems_interrupt_level. |
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100 | */ |
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101 | #define rtems_interrupt_flash( _isr_cookie ) \ |
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102 | _ISR_Flash(_isr_cookie) |
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103 | |
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104 | /** |
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105 | * @brief Returns true if the processor is currently servicing an interrupt |
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106 | * and false otherwise. |
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107 | * |
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108 | * A return value of true indicates that the caller is an interrupt service |
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109 | * routine and @b not a thread. The directives available to an interrupt |
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110 | * service routine are restricted. |
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111 | */ |
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112 | #define rtems_interrupt_is_in_progress() \ |
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113 | _ISR_Is_in_progress() |
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114 | |
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115 | /** |
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116 | * @brief This routine generates an interrupt. |
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117 | * |
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118 | * @note No implementation. |
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119 | */ |
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120 | #define rtems_interrupt_cause( _interrupt_to_cause ) |
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121 | |
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122 | /** |
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123 | * @brief This routine clears the specified interrupt. |
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124 | * |
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125 | * @note No implementation. |
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126 | */ |
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127 | #define rtems_interrupt_clear( _interrupt_to_clear ) |
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128 | |
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129 | #ifdef __cplusplus |
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130 | } |
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131 | #endif |
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132 | |
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133 | /**@}*/ |
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134 | |
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135 | #endif |
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136 | /* end of include file */ |
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