1 | /* Shm_Initialization |
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2 | * |
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3 | * This routine is the shared memory communications initerface |
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4 | * driver initialization routine. |
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5 | * |
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6 | * Input parameters: NONE |
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7 | * |
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8 | * Output parameters: NONE |
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9 | * |
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10 | * COPYRIGHT (c) 1989-1997. |
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11 | * On-Line Applications Research Corporation (OAR). |
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12 | * Copyright assigned to U.S. Government, 1994. |
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13 | * |
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14 | * The license and distribution terms for this file may be |
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15 | * found in the file LICENSE in this distribution or at |
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16 | * http://www.OARcorp.com/rtems/license.html. |
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17 | * |
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18 | * $Id$ |
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19 | */ |
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20 | |
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21 | #define _SHM_INIT |
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22 | |
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23 | #include <rtems.h> |
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24 | #include <shm.h> |
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25 | |
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26 | #include <string.h> /* memset() */ |
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27 | #include <stdlib.h> /* malloc() */ |
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28 | #include <assert.h> |
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29 | |
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30 | /* |
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31 | * User extension to install MPCI_Fatal as a fatal error |
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32 | * handler extension |
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33 | */ |
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34 | |
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35 | rtems_extensions_table MPCI_Shm_extensions; |
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36 | |
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37 | rtems_mpci_entry Shm_Initialization( void ) |
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38 | |
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39 | { |
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40 | rtems_unsigned32 i, all_initialized; |
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41 | rtems_unsigned32 interrupt_cause, interrupt_value; |
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42 | void *interrupt_address; |
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43 | Shm_Node_status_control *nscb; |
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44 | rtems_unsigned32 extension_id; /* for installation of MPCI_Fatal */ |
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45 | rtems_unsigned32 remaining_memory; |
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46 | /* XXX these should use "public" methods to set their values.... */ |
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47 | rtems_configuration_table *configuration = _Configuration_Table; |
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48 | rtems_multiprocessing_table *mp_configuration = _Configuration_MP_table; |
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49 | |
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50 | Shm_RTEMS_Configuration = configuration; |
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51 | Shm_RTEMS_MP_Configuration = mp_configuration; |
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52 | |
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53 | Shm_Local_node = Shm_RTEMS_MP_Configuration->node; |
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54 | Shm_Maximum_nodes = Shm_RTEMS_MP_Configuration->maximum_nodes; |
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55 | |
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56 | Shm_Get_configuration( Shm_Local_node, &Shm_Configuration ); |
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57 | |
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58 | Shm_Interrupt_table = (Shm_Interrupt_information *) malloc( |
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59 | sizeof(Shm_Interrupt_information) * (Shm_Maximum_nodes + 1) |
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60 | ); |
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61 | |
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62 | assert( Shm_Interrupt_table ); |
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63 | |
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64 | |
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65 | Shm_Receive_message_count = 0; |
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66 | Shm_Null_message_count = 0; |
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67 | Shm_Interrupt_count = 0; |
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68 | |
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69 | /* |
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70 | * Set the Node Status indicators |
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71 | */ |
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72 | |
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73 | Shm_Pending_initialization = |
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74 | Shm_Convert(rtems_build_name( 'P', 'E', 'N', 'D' )); |
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75 | Shm_Initialization_complete = |
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76 | Shm_Convert(rtems_build_name( 'C', 'O', 'M', 'P' )); |
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77 | Shm_Active_node = |
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78 | Shm_Convert(rtems_build_name( 'A', 'C', 'T', 'V' )); |
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79 | |
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80 | /* |
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81 | * Initialize the constants used by the Locked Queue code. |
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82 | */ |
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83 | |
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84 | Shm_Locked_queue_End_of_list = Shm_Convert( 0xffffffff ); |
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85 | Shm_Locked_queue_Not_on_list = Shm_Convert( 0xfffffffe ); |
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86 | |
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87 | /* |
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88 | * Set the base addresses for the: |
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89 | * + Node Status Table |
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90 | * + Free Pool and Receive Queues |
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91 | * + Envelopes |
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92 | */ |
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93 | |
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94 | Shm_Node_statuses = (Shm_Node_status_control *) START_NS_CBS; |
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95 | Shm_Locked_queues = (Shm_Locked_queue_Control *) START_LQ_CBS; |
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96 | Shm_Envelopes = (Shm_Envelope_control *) START_ENVELOPES; |
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97 | |
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98 | /* |
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99 | * Calculate the maximum number of envelopes which can be |
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100 | * placed the remaining shared memory. |
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101 | */ |
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102 | |
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103 | remaining_memory = |
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104 | ((void *)Shm_Configuration->base + Shm_Configuration->length) - |
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105 | ((void *)Shm_Envelopes); |
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106 | |
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107 | Shm_Maximum_envelopes = remaining_memory / sizeof( Shm_Envelope_control ); |
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108 | Shm_Maximum_envelopes -= 1; |
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109 | |
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110 | /* |
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111 | * Set the pointer to the receive queue for the local node. |
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112 | * When we receive a node, we will get it from here before |
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113 | * processing it. |
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114 | */ |
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115 | |
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116 | Shm_Local_receive_queue = &Shm_Locked_queues[ Shm_Local_node ]; |
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117 | Shm_Local_node_status = &Shm_Node_statuses[ Shm_Local_node ]; |
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118 | |
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119 | /* |
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120 | * Convert local interrupt cause information into the |
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121 | * neutral format so other nodes will be able to |
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122 | * understand it. |
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123 | */ |
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124 | |
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125 | interrupt_address = |
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126 | (void *) Shm_Convert( (rtems_unsigned32)Shm_Configuration->Intr.address ); |
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127 | interrupt_value = Shm_Convert( Shm_Configuration->Intr.value ); |
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128 | interrupt_cause = Shm_Convert( Shm_Configuration->Intr.length ); |
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129 | |
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130 | if ( Shm_Configuration->poll_intr == POLLED_MODE ) Shm_setclockvec(); |
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131 | else Shm_setvec(); |
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132 | |
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133 | if ( Shm_Is_master_node() ) { |
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134 | |
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135 | /* |
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136 | * Zero out the shared memory area. |
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137 | */ |
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138 | |
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139 | (void) memset( |
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140 | (void *) Shm_Configuration->base, |
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141 | 0, |
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142 | Shm_Configuration->length |
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143 | ); |
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144 | |
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145 | /* |
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146 | * Initialize all of the locked queues (the free envelope |
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147 | * pool and a receive queue per node) and set all of the |
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148 | * node's status so they will be waiting to initialization |
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149 | * to complete. |
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150 | */ |
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151 | |
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152 | Shm_Locked_queue_Initialize( FREE_ENV_CB, FREE_ENV_POOL ); |
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153 | |
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154 | for ( i=SHM_FIRST_NODE ; i<=Shm_Maximum_nodes ; i++ ) { |
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155 | Shm_Initialize_receive_queue( i ); |
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156 | |
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157 | Shm_Node_statuses[ i ].status = Shm_Pending_initialization; |
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158 | Shm_Node_statuses[ i ].error = 0; |
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159 | } |
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160 | |
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161 | /* |
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162 | * Initialize all of the envelopes and place them in the |
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163 | * free pool. |
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164 | */ |
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165 | |
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166 | for ( i=0 ; i<Shm_Maximum_envelopes ; i++ ) { |
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167 | Shm_Envelopes[ i ].index = Shm_Convert(i); |
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168 | Shm_Free_envelope( &Shm_Envelopes[ i ] ); |
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169 | } |
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170 | |
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171 | /* |
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172 | * Initialize this node's interrupt information in the |
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173 | * shared area so other nodes can interrupt us. |
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174 | */ |
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175 | |
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176 | Shm_Local_node_status->int_address = (rtems_unsigned32) interrupt_address; |
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177 | Shm_Local_node_status->int_value = interrupt_value; |
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178 | Shm_Local_node_status->int_length = interrupt_cause; |
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179 | |
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180 | Shm_Local_node_status->status = Shm_Initialization_complete; |
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181 | |
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182 | /* |
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183 | * Loop until all nodes have completed initialization. |
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184 | */ |
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185 | |
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186 | do { |
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187 | all_initialized = 1; |
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188 | |
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189 | for ( i = SHM_FIRST_NODE ; i <= Shm_Maximum_nodes ; i++ ) |
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190 | if ( Shm_Node_statuses[ i ].status != Shm_Initialization_complete ) |
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191 | all_initialized = 0; |
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192 | |
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193 | } while ( all_initialized == 0 ); |
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194 | |
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195 | /* |
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196 | * Tell the other nodes we think that the system is up. |
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197 | */ |
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198 | |
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199 | for ( i = SHM_FIRST_NODE ; i <= Shm_Maximum_nodes ; i++ ) |
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200 | Shm_Node_statuses[ i ].status = Shm_Active_node; |
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201 | |
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202 | } else { /* is not MASTER node */ |
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203 | |
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204 | /* |
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205 | * Initialize the node status for the non-master nodes. |
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206 | * Because the master node zeroes out memory, it is |
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207 | * necessary for them to keep putting their values in |
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208 | * the node status area until the master says they |
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209 | * should become active. |
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210 | */ |
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211 | |
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212 | Shm_Local_node_status->status = Shm_Pending_initialization; |
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213 | |
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214 | do { |
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215 | |
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216 | if ( Shm_Local_node_status->status == Shm_Pending_initialization ) { |
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217 | |
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218 | /* |
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219 | * Initialize this node's interrupt information in the |
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220 | * shared area so other nodes can interrupt us. |
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221 | */ |
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222 | |
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223 | Shm_Local_node_status->int_address = |
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224 | (rtems_unsigned32) interrupt_address; |
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225 | Shm_Local_node_status->int_value = interrupt_value; |
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226 | Shm_Local_node_status->int_length = interrupt_cause; |
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227 | |
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228 | Shm_Local_node_status->status = Shm_Initialization_complete; |
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229 | } |
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230 | } while ( Shm_Local_node_status->status != Shm_Active_node ) ; |
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231 | } |
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232 | |
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233 | /* |
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234 | * Initialize the Interrupt Information Table |
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235 | */ |
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236 | |
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237 | for ( i = SHM_FIRST_NODE ; i <= Shm_Maximum_nodes ; i++ ) { |
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238 | nscb = &Shm_Node_statuses[ i ]; |
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239 | |
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240 | Shm_Interrupt_table[i].address = Shm_Convert_address( |
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241 | (void *)Shm_Convert(((vol_u32) nscb->int_address)) |
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242 | ); |
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243 | Shm_Interrupt_table[i].value = Shm_Convert( nscb->int_value ); |
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244 | Shm_Interrupt_table[i].length = Shm_Convert( nscb->int_length ); |
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245 | } |
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246 | |
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247 | MPCI_Shm_extensions.fatal = MPCI_Fatal; |
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248 | |
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249 | (void) rtems_extension_create( |
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250 | rtems_build_name( 'M', 'P', 'E', 'X' ), |
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251 | &MPCI_Shm_extensions, |
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252 | &extension_id |
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253 | ); |
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254 | } |
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