1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Multiprocessing Communications Interface (MPCI) Handler |
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5 | * @ingroup ScoreMPCI |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-2008. |
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10 | * On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.com/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <rtems/system.h> |
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22 | #if defined(RTEMS_MULTIPROCESSING) |
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23 | #include <rtems/score/mpci.h> |
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24 | #include <rtems/score/mppkt.h> |
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25 | #endif |
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26 | #include <rtems/config.h> |
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27 | #include <rtems/score/cpu.h> |
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28 | #include <rtems/score/interr.h> |
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29 | #include <rtems/score/states.h> |
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30 | #include <rtems/score/thread.h> |
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31 | #include <rtems/score/threadq.h> |
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32 | #include <rtems/score/tqdata.h> |
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33 | #include <rtems/score/watchdog.h> |
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34 | #include <rtems/score/sysstate.h> |
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35 | |
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36 | #include <rtems/score/coresem.h> |
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37 | #include <rtems/config.h> |
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38 | |
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39 | RTEMS_STATIC_ASSERT( |
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40 | sizeof(MPCI_Internal_packet) <= MP_PACKET_MINIMUM_PACKET_SIZE, |
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41 | MPCI_Internal_packet |
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42 | ); |
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43 | |
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44 | /** |
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45 | * This is the core semaphore which the MPCI Receive Server blocks on. |
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46 | */ |
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47 | CORE_semaphore_Control _MPCI_Semaphore; |
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48 | |
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49 | void _MPCI_Handler_initialization( |
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50 | uint32_t timeout_status |
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51 | ) |
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52 | { |
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53 | CORE_semaphore_Attributes attributes; |
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54 | MPCI_Control *users_mpci_table; |
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55 | |
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56 | users_mpci_table = _Configuration_MP_table->User_mpci_table; |
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57 | |
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58 | if ( _System_state_Is_multiprocessing && !users_mpci_table ) |
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59 | _Internal_error_Occurred( |
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60 | INTERNAL_ERROR_CORE, |
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61 | true, |
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62 | INTERNAL_ERROR_NO_MPCI |
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63 | ); |
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64 | |
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65 | _MPCI_table = users_mpci_table; |
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66 | |
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67 | if ( !_System_state_Is_multiprocessing ) |
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68 | return; |
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69 | |
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70 | /* |
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71 | * Register the MP Process Packet routine. |
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72 | */ |
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73 | |
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74 | _MPCI_Register_packet_processor( |
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75 | MP_PACKET_MPCI_INTERNAL, |
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76 | _MPCI_Internal_packets_Process_packet |
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77 | ); |
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78 | |
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79 | /* |
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80 | * Create the counting semaphore used by the MPCI Receive Server. |
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81 | */ |
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82 | |
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83 | attributes.discipline = CORE_SEMAPHORE_DISCIPLINES_FIFO; |
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84 | |
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85 | _CORE_semaphore_Initialize( |
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86 | &_MPCI_Semaphore, |
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87 | &attributes, /* the_semaphore_attributes */ |
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88 | 0 /* initial_value */ |
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89 | ); |
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90 | |
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91 | _Thread_queue_Initialize( |
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92 | &_MPCI_Remote_blocked_threads, |
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93 | THREAD_QUEUE_DISCIPLINE_FIFO, |
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94 | STATES_WAITING_FOR_RPC_REPLY, |
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95 | timeout_status |
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96 | ); |
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97 | } |
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98 | |
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99 | void _MPCI_Create_server( void ) |
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100 | { |
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101 | Objects_Name name; |
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102 | |
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103 | |
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104 | if ( !_System_state_Is_multiprocessing ) |
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105 | return; |
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106 | |
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107 | /* |
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108 | * Initialize the MPCI Receive Server |
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109 | */ |
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110 | |
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111 | _MPCI_Receive_server_tcb = _Thread_Internal_allocate(); |
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112 | |
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113 | name.name_u32 = _Objects_Build_name( 'M', 'P', 'C', 'I' ); |
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114 | _Thread_Initialize( |
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115 | &_Thread_Internal_information, |
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116 | _MPCI_Receive_server_tcb, |
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117 | NULL, /* allocate the stack */ |
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118 | _Stack_Minimum() + |
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119 | CPU_MPCI_RECEIVE_SERVER_EXTRA_STACK + |
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120 | _Configuration_MP_table->extra_mpci_receive_server_stack, |
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121 | CPU_ALL_TASKS_ARE_FP, |
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122 | PRIORITY_MINIMUM, |
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123 | false, /* no preempt */ |
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124 | THREAD_CPU_BUDGET_ALGORITHM_NONE, |
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125 | NULL, /* no budget algorithm callout */ |
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126 | 0, /* all interrupts enabled */ |
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127 | name |
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128 | ); |
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129 | |
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130 | _Thread_Start( |
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131 | _MPCI_Receive_server_tcb, |
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132 | THREAD_START_NUMERIC, |
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133 | (void *) _MPCI_Receive_server, |
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134 | NULL, |
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135 | 0 |
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136 | ); |
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137 | } |
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138 | |
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139 | void _MPCI_Initialization ( void ) |
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140 | { |
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141 | (*_MPCI_table->initialization)(); |
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142 | } |
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143 | |
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144 | void _MPCI_Register_packet_processor( |
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145 | MP_packet_Classes the_class, |
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146 | MPCI_Packet_processor the_packet_processor |
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147 | |
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148 | ) |
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149 | { |
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150 | _MPCI_Packet_processors[ the_class ] = the_packet_processor; |
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151 | } |
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152 | |
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153 | MP_packet_Prefix *_MPCI_Get_packet ( void ) |
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154 | { |
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155 | MP_packet_Prefix *the_packet; |
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156 | |
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157 | (*_MPCI_table->get_packet)( &the_packet ); |
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158 | |
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159 | if ( the_packet == NULL ) |
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160 | _Internal_error_Occurred( |
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161 | INTERNAL_ERROR_CORE, |
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162 | true, |
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163 | INTERNAL_ERROR_OUT_OF_PACKETS |
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164 | ); |
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165 | |
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166 | /* |
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167 | * Put in a default timeout that will be used for |
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168 | * all packets that do not otherwise have a timeout. |
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169 | */ |
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170 | |
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171 | the_packet->timeout = MPCI_DEFAULT_TIMEOUT; |
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172 | |
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173 | return the_packet; |
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174 | } |
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175 | |
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176 | void _MPCI_Return_packet ( |
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177 | MP_packet_Prefix *the_packet |
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178 | ) |
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179 | { |
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180 | (*_MPCI_table->return_packet)( the_packet ); |
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181 | } |
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182 | |
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183 | void _MPCI_Send_process_packet ( |
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184 | uint32_t destination, |
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185 | MP_packet_Prefix *the_packet |
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186 | ) |
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187 | { |
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188 | the_packet->source_tid = _Thread_Executing->Object.id; |
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189 | the_packet->to_convert = |
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190 | ( the_packet->to_convert - sizeof(MP_packet_Prefix) ) / sizeof(uint32_t); |
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191 | |
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192 | (*_MPCI_table->send_packet)( destination, the_packet ); |
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193 | } |
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194 | |
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195 | uint32_t _MPCI_Send_request_packet ( |
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196 | uint32_t destination, |
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197 | MP_packet_Prefix *the_packet, |
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198 | States_Control extra_state |
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199 | ) |
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200 | { |
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201 | the_packet->source_tid = _Thread_Executing->Object.id; |
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202 | the_packet->source_priority = _Thread_Executing->current_priority; |
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203 | the_packet->to_convert = |
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204 | ( the_packet->to_convert - sizeof(MP_packet_Prefix) ) / sizeof(uint32_t); |
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205 | |
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206 | _Thread_Executing->Wait.id = the_packet->id; |
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207 | |
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208 | _Thread_Executing->Wait.queue = &_MPCI_Remote_blocked_threads; |
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209 | |
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210 | _Thread_Disable_dispatch(); |
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211 | |
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212 | (*_MPCI_table->send_packet)( destination, the_packet ); |
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213 | |
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214 | _Thread_queue_Enter_critical_section( &_MPCI_Remote_blocked_threads ); |
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215 | |
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216 | /* |
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217 | * See if we need a default timeout |
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218 | */ |
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219 | |
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220 | if (the_packet->timeout == MPCI_DEFAULT_TIMEOUT) |
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221 | the_packet->timeout = _MPCI_table->default_timeout; |
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222 | |
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223 | _Thread_queue_Enqueue( &_MPCI_Remote_blocked_threads, the_packet->timeout ); |
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224 | |
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225 | _Thread_Executing->current_state = |
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226 | _States_Set( extra_state, _Thread_Executing->current_state ); |
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227 | |
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228 | _Thread_Enable_dispatch(); |
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229 | |
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230 | return _Thread_Executing->Wait.return_code; |
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231 | } |
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232 | |
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233 | void _MPCI_Send_response_packet ( |
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234 | uint32_t destination, |
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235 | MP_packet_Prefix *the_packet |
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236 | ) |
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237 | { |
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238 | the_packet->source_tid = _Thread_Executing->Object.id; |
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239 | |
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240 | (*_MPCI_table->send_packet)( destination, the_packet ); |
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241 | } |
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242 | |
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243 | MP_packet_Prefix *_MPCI_Receive_packet ( void ) |
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244 | { |
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245 | MP_packet_Prefix *the_packet; |
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246 | |
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247 | (*_MPCI_table->receive_packet)( &the_packet ); |
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248 | |
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249 | return the_packet; |
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250 | } |
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251 | |
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252 | Thread_Control *_MPCI_Process_response ( |
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253 | MP_packet_Prefix *the_packet |
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254 | ) |
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255 | { |
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256 | Thread_Control *the_thread; |
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257 | Objects_Locations location; |
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258 | |
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259 | the_thread = _Thread_Get( the_packet->id, &location ); |
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260 | switch ( location ) { |
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261 | case OBJECTS_ERROR: |
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262 | #if defined(RTEMS_MULTIPROCESSING) |
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263 | case OBJECTS_REMOTE: |
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264 | #endif |
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265 | the_thread = NULL; /* IMPOSSIBLE */ |
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266 | break; |
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267 | case OBJECTS_LOCAL: |
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268 | _Thread_queue_Extract( &_MPCI_Remote_blocked_threads, the_thread ); |
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269 | the_thread->Wait.return_code = the_packet->return_code; |
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270 | _Thread_Unnest_dispatch(); |
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271 | break; |
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272 | } |
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273 | |
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274 | return the_thread; |
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275 | } |
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276 | |
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277 | /* |
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278 | * _MPCI_Receive_server |
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279 | * |
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280 | */ |
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281 | |
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282 | Thread _MPCI_Receive_server( |
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283 | uint32_t ignored |
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284 | ) |
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285 | { |
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286 | |
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287 | MP_packet_Prefix *the_packet; |
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288 | MPCI_Packet_processor the_function; |
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289 | Thread_Control *executing; |
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290 | |
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291 | executing = _Thread_Executing; |
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292 | |
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293 | for ( ; ; ) { |
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294 | |
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295 | executing->receive_packet = NULL; |
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296 | |
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297 | _Thread_Disable_dispatch(); |
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298 | _CORE_semaphore_Seize( &_MPCI_Semaphore, 0, true, WATCHDOG_NO_TIMEOUT ); |
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299 | _Thread_Enable_dispatch(); |
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300 | |
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301 | for ( ; ; ) { |
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302 | the_packet = _MPCI_Receive_packet(); |
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303 | |
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304 | if ( !the_packet ) |
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305 | break; |
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306 | |
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307 | executing->receive_packet = the_packet; |
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308 | |
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309 | if ( !_Mp_packet_Is_valid_packet_class ( the_packet->the_class ) ) |
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310 | break; |
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311 | |
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312 | the_function = _MPCI_Packet_processors[ the_packet->the_class ]; |
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313 | |
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314 | if ( !the_function ) |
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315 | _Internal_error_Occurred( |
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316 | INTERNAL_ERROR_CORE, |
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317 | true, |
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318 | INTERNAL_ERROR_BAD_PACKET |
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319 | ); |
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320 | |
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321 | (*the_function)( the_packet ); |
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322 | } |
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323 | } |
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324 | |
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325 | return 0; /* unreached - only to remove warnings */ |
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326 | } |
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327 | |
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328 | void _MPCI_Announce ( void ) |
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329 | { |
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330 | _Thread_Disable_dispatch(); |
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331 | (void) _CORE_semaphore_Surrender( &_MPCI_Semaphore, 0, 0 ); |
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332 | _Thread_Enable_dispatch(); |
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333 | } |
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334 | |
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335 | void _MPCI_Internal_packets_Send_process_packet ( |
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336 | MPCI_Internal_Remote_operations operation |
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337 | ) |
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338 | { |
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339 | MPCI_Internal_packet *the_packet; |
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340 | |
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341 | switch ( operation ) { |
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342 | |
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343 | case MPCI_PACKETS_SYSTEM_VERIFY: |
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344 | |
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345 | the_packet = _MPCI_Internal_packets_Get_packet(); |
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346 | the_packet->Prefix.the_class = MP_PACKET_MPCI_INTERNAL; |
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347 | the_packet->Prefix.length = sizeof ( MPCI_Internal_packet ); |
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348 | the_packet->Prefix.to_convert = sizeof ( MPCI_Internal_packet ); |
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349 | the_packet->operation = operation; |
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350 | |
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351 | the_packet->maximum_nodes = _Objects_Maximum_nodes; |
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352 | |
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353 | the_packet->maximum_global_objects = _Objects_MP_Maximum_global_objects; |
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354 | |
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355 | _MPCI_Send_process_packet( MPCI_ALL_NODES, &the_packet->Prefix ); |
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356 | break; |
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357 | } |
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358 | } |
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359 | |
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360 | /* |
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361 | * _MPCI_Internal_packets_Send_request_packet |
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362 | * |
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363 | * This subprogram is not needed since there are no request |
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364 | * packets to be sent by this manager. |
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365 | * |
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366 | */ |
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367 | |
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368 | /* |
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369 | * _MPCI_Internal_packets_Send_response_packet |
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370 | * |
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371 | * This subprogram is not needed since there are no response |
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372 | * packets to be sent by this manager. |
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373 | * |
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374 | */ |
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375 | |
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376 | void _MPCI_Internal_packets_Process_packet ( |
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377 | MP_packet_Prefix *the_packet_prefix |
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378 | ) |
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379 | { |
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380 | MPCI_Internal_packet *the_packet; |
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381 | uint32_t maximum_nodes; |
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382 | uint32_t maximum_global_objects; |
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383 | |
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384 | the_packet = (MPCI_Internal_packet *) the_packet_prefix; |
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385 | |
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386 | switch ( the_packet->operation ) { |
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387 | |
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388 | case MPCI_PACKETS_SYSTEM_VERIFY: |
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389 | |
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390 | maximum_nodes = the_packet->maximum_nodes; |
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391 | maximum_global_objects = the_packet->maximum_global_objects; |
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392 | if ( maximum_nodes != _Objects_Maximum_nodes || |
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393 | maximum_global_objects != _Objects_MP_Maximum_global_objects ) { |
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394 | |
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395 | _MPCI_Return_packet( the_packet_prefix ); |
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396 | |
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397 | _Internal_error_Occurred( |
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398 | INTERNAL_ERROR_CORE, |
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399 | true, |
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400 | INTERNAL_ERROR_INCONSISTENT_MP_INFORMATION |
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401 | ); |
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402 | } |
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403 | |
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404 | _MPCI_Return_packet( the_packet_prefix ); |
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405 | |
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406 | break; |
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407 | } |
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408 | } |
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409 | |
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410 | /* |
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411 | * _MPCI_Internal_packets_Send_object_was_deleted |
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412 | * |
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413 | * This subprogram is not needed since there are no objects |
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414 | * deleted by this manager. |
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415 | * |
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416 | */ |
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417 | |
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418 | /* |
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419 | * _MPCI_Internal_packets_Send_extract_proxy |
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420 | * |
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421 | * This subprogram is not needed since there are no objects |
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422 | * deleted by this manager. |
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423 | * |
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424 | */ |
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425 | |
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426 | MPCI_Internal_packet *_MPCI_Internal_packets_Get_packet ( void ) |
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427 | { |
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428 | return ( (MPCI_Internal_packet *) _MPCI_Get_packet() ); |
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429 | } |
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430 | |
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431 | /* end of file */ |
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