[ac7d5ef0] | 1 | /* |
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| 2 | * Multiprocessing Communications Interface (MPCI) Handler |
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| 3 | * |
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| 4 | * |
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| 5 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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| 6 | * On-Line Applications Research Corporation (OAR). |
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| 7 | * All rights assigned to U.S. Government, 1994. |
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| 8 | * |
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| 9 | * This material may be reproduced by or for the U.S. Government pursuant |
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| 10 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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| 11 | * notice must appear in all copies of this file and its derivatives. |
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| 12 | * |
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| 13 | * $Id$ |
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| 14 | */ |
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| 15 | |
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| 16 | #include <rtems/system.h> |
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[5e9b32b] | 17 | #include <rtems/score/cpu.h> |
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| 18 | #include <rtems/score/interr.h> |
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| 19 | #include <rtems/score/mpci.h> |
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| 20 | #include <rtems/score/mppkt.h> |
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| 21 | #include <rtems/score/states.h> |
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| 22 | #include <rtems/score/thread.h> |
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| 23 | #include <rtems/score/threadq.h> |
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| 24 | #include <rtems/score/tqdata.h> |
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| 25 | #include <rtems/score/watchdog.h> |
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| 26 | #include <rtems/score/sysstate.h> |
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| 27 | |
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| 28 | #include <rtems/score/coresem.h> |
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[3a4ae6c] | 29 | |
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[ac7d5ef0] | 30 | /*PAGE |
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| 31 | * |
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| 32 | * _MPCI_Handler_initialization |
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| 33 | * |
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| 34 | * This subprogram performs the initialization necessary for this handler. |
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| 35 | */ |
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| 36 | |
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[3a4ae6c] | 37 | void _MPCI_Handler_initialization( |
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[cda7ecc] | 38 | MPCI_Control *users_mpci_table, |
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| 39 | unsigned32 timeout_status |
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[3a4ae6c] | 40 | ) |
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[ac7d5ef0] | 41 | { |
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[3a4ae6c] | 42 | CORE_semaphore_Attributes attributes; |
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| 43 | |
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| 44 | if ( _System_state_Is_multiprocessing && !users_mpci_table ) |
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| 45 | _Internal_error_Occurred( |
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| 46 | INTERNAL_ERROR_CORE, |
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| 47 | TRUE, |
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| 48 | INTERNAL_ERROR_NO_MPCI |
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| 49 | ); |
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| 50 | |
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| 51 | _MPCI_table = users_mpci_table; |
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| 52 | |
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[adf98bd] | 53 | if ( !_System_state_Is_multiprocessing ) |
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| 54 | return; |
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| 55 | |
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| 56 | /* |
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| 57 | * Register the MP Process Packet routine. |
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| 58 | */ |
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| 59 | |
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| 60 | _MPCI_Register_packet_processor( |
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| 61 | MP_PACKET_MPCI_INTERNAL, |
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| 62 | _MPCI_Internal_packets_Process_packet |
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| 63 | ); |
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| 64 | |
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| 65 | /* |
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| 66 | * Create the counting semaphore used by the MPCI Receive Server. |
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| 67 | */ |
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| 68 | |
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[3a4ae6c] | 69 | attributes.discipline = CORE_SEMAPHORE_DISCIPLINES_FIFO; |
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| 70 | |
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| 71 | _CORE_semaphore_Initialize( |
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| 72 | &_MPCI_Semaphore, |
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| 73 | OBJECTS_NO_CLASS, /* free floating semaphore */ |
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| 74 | &attributes, /* the_semaphore_attributes */ |
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| 75 | 0, /* initial_value */ |
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| 76 | NULL /* proxy_extract_callout */ |
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| 77 | ); |
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| 78 | |
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[ac7d5ef0] | 79 | _Thread_queue_Initialize( |
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| 80 | &_MPCI_Remote_blocked_threads, |
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[7f6a24ab] | 81 | OBJECTS_NO_CLASS, |
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| 82 | THREAD_QUEUE_DISCIPLINE_FIFO, |
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| 83 | STATES_WAITING_FOR_RPC_REPLY, |
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[3a4ae6c] | 84 | NULL, |
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[cda7ecc] | 85 | timeout_status |
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[ac7d5ef0] | 86 | ); |
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| 87 | } |
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| 88 | |
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[adf98bd] | 89 | /*PAGE |
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| 90 | * |
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| 91 | * _MPCI_Create_server |
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| 92 | * |
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| 93 | * This subprogram creates the MPCI receive server. |
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| 94 | */ |
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| 95 | |
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| 96 | char *_MPCI_Internal_name = "MPCI"; |
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| 97 | |
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| 98 | void _MPCI_Create_server( void ) |
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| 99 | { |
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| 100 | |
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| 101 | if ( !_System_state_Is_multiprocessing ) |
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| 102 | return; |
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| 103 | |
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| 104 | /* |
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| 105 | * Initialize the MPCI Receive Server |
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| 106 | */ |
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| 107 | |
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| 108 | _MPCI_Receive_server_tcb = _Thread_Internal_allocate(); |
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| 109 | |
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| 110 | _Thread_Initialize( |
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| 111 | &_Thread_Internal_information, |
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| 112 | _MPCI_Receive_server_tcb, |
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| 113 | NULL, /* allocate the stack */ |
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| 114 | MPCI_RECEIVE_SERVER_STACK_SIZE, |
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| 115 | CPU_ALL_TASKS_ARE_FP, |
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| 116 | PRIORITY_MINIMUM, |
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| 117 | FALSE, /* no preempt */ |
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[ebd40c0] | 118 | THREAD_CPU_BUDGET_ALGORITHM_NONE, |
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| 119 | NULL, /* no budget algorithm callout */ |
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[adf98bd] | 120 | 0, /* all interrupts enabled */ |
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| 121 | _MPCI_Internal_name |
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| 122 | ); |
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| 123 | |
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| 124 | _Thread_Start( |
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| 125 | _MPCI_Receive_server_tcb, |
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| 126 | THREAD_START_NUMERIC, |
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[1019ae4] | 127 | (void *) _MPCI_Receive_server, |
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[adf98bd] | 128 | NULL, |
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| 129 | 0 |
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| 130 | ); |
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| 131 | } |
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| 132 | |
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[ac7d5ef0] | 133 | /*PAGE |
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| 134 | * |
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| 135 | * _MPCI_Initialization |
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| 136 | * |
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| 137 | * This subprogram initializes the MPCI driver by |
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| 138 | * invoking the user provided MPCI initialization callout. |
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| 139 | */ |
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| 140 | |
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| 141 | void _MPCI_Initialization ( void ) |
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| 142 | { |
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[3a4ae6c] | 143 | (*_MPCI_table->initialization)(); |
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| 144 | } |
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| 145 | |
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| 146 | /*PAGE |
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| 147 | * |
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| 148 | * _MPCI_Register_packet_processor |
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| 149 | * |
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| 150 | * This routine registers the MPCI packet processor for the |
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| 151 | * designated object class. |
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| 152 | */ |
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| 153 | |
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| 154 | void _MPCI_Register_packet_processor( |
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[3fd3da4] | 155 | MP_packet_Classes the_class, |
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[3a4ae6c] | 156 | MPCI_Packet_processor the_packet_processor |
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| 157 | |
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| 158 | ) |
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| 159 | { |
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| 160 | _MPCI_Packet_processors[ the_class ] = the_packet_processor; |
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[ac7d5ef0] | 161 | } |
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| 162 | |
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| 163 | /*PAGE |
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| 164 | * |
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| 165 | * _MPCI_Get_packet |
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| 166 | * |
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| 167 | * This subprogram obtains a packet by invoking the user provided |
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| 168 | * MPCI get packet callout. |
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| 169 | */ |
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| 170 | |
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[3a4ae6c] | 171 | MP_packet_Prefix *_MPCI_Get_packet ( void ) |
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[ac7d5ef0] | 172 | { |
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[3a4ae6c] | 173 | MP_packet_Prefix *the_packet; |
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[ac7d5ef0] | 174 | |
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[3a4ae6c] | 175 | (*_MPCI_table->get_packet)( &the_packet ); |
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[ac7d5ef0] | 176 | |
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| 177 | if ( the_packet == NULL ) |
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[3a4ae6c] | 178 | _Internal_error_Occurred( |
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| 179 | INTERNAL_ERROR_CORE, |
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| 180 | TRUE, |
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| 181 | INTERNAL_ERROR_OUT_OF_PACKETS |
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| 182 | ); |
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[ac7d5ef0] | 183 | |
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| 184 | /* |
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| 185 | * Put in a default timeout that will be used for |
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| 186 | * all packets that do not otherwise have a timeout. |
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| 187 | */ |
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| 188 | |
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| 189 | the_packet->timeout = MPCI_DEFAULT_TIMEOUT; |
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| 190 | |
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| 191 | return the_packet; |
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| 192 | } |
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| 193 | |
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| 194 | /*PAGE |
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| 195 | * |
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| 196 | * _MPCI_Return_packet |
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| 197 | * |
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| 198 | * This subprogram returns a packet by invoking the user provided |
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| 199 | * MPCI return packet callout. |
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| 200 | */ |
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| 201 | |
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| 202 | void _MPCI_Return_packet ( |
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[3a4ae6c] | 203 | MP_packet_Prefix *the_packet |
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[ac7d5ef0] | 204 | ) |
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| 205 | { |
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[3a4ae6c] | 206 | (*_MPCI_table->return_packet)( the_packet ); |
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[ac7d5ef0] | 207 | } |
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| 208 | |
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| 209 | /*PAGE |
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| 210 | * |
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| 211 | * _MPCI_Send_process_packet |
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| 212 | * |
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| 213 | * This subprogram sends a process packet by invoking the user provided |
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| 214 | * MPCI send callout. |
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| 215 | */ |
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| 216 | |
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| 217 | void _MPCI_Send_process_packet ( |
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| 218 | unsigned32 destination, |
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[3a4ae6c] | 219 | MP_packet_Prefix *the_packet |
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[ac7d5ef0] | 220 | ) |
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| 221 | { |
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| 222 | the_packet->source_tid = _Thread_Executing->Object.id; |
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| 223 | the_packet->to_convert = |
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[3a4ae6c] | 224 | ( the_packet->to_convert - sizeof(MP_packet_Prefix) ) / |
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[ac7d5ef0] | 225 | sizeof(unsigned32); |
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| 226 | |
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[3a4ae6c] | 227 | (*_MPCI_table->send_packet)( destination, the_packet ); |
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[ac7d5ef0] | 228 | } |
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| 229 | |
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| 230 | /*PAGE |
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| 231 | * |
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| 232 | * _MPCI_Send_request_packet |
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| 233 | * |
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| 234 | * This subprogram sends a request packet by invoking the user provided |
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| 235 | * MPCI send callout. |
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| 236 | */ |
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| 237 | |
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[3a4ae6c] | 238 | unsigned32 _MPCI_Send_request_packet ( |
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[ac7d5ef0] | 239 | unsigned32 destination, |
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[3a4ae6c] | 240 | MP_packet_Prefix *the_packet, |
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[ac7d5ef0] | 241 | States_Control extra_state |
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| 242 | ) |
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| 243 | { |
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| 244 | the_packet->source_tid = _Thread_Executing->Object.id; |
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| 245 | the_packet->source_priority = _Thread_Executing->current_priority; |
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| 246 | the_packet->to_convert = |
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[3a4ae6c] | 247 | ( the_packet->to_convert - sizeof(MP_packet_Prefix) ) / |
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[ac7d5ef0] | 248 | sizeof(unsigned32); |
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| 249 | |
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| 250 | _Thread_Executing->Wait.id = the_packet->id; |
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| 251 | |
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| 252 | _Thread_Executing->Wait.queue = &_MPCI_Remote_blocked_threads; |
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| 253 | |
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| 254 | _Thread_Disable_dispatch(); |
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| 255 | |
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[3a4ae6c] | 256 | (*_MPCI_table->send_packet)( destination, the_packet ); |
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[ac7d5ef0] | 257 | |
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[67d224a] | 258 | _Thread_queue_Enter_critical_section( &_MPCI_Remote_blocked_threads ); |
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[ac7d5ef0] | 259 | |
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| 260 | /* |
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| 261 | * See if we need a default timeout |
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| 262 | */ |
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| 263 | |
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| 264 | if (the_packet->timeout == MPCI_DEFAULT_TIMEOUT) |
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[3a4ae6c] | 265 | the_packet->timeout = _MPCI_table->default_timeout; |
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[ac7d5ef0] | 266 | |
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| 267 | _Thread_queue_Enqueue( &_MPCI_Remote_blocked_threads, the_packet->timeout ); |
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| 268 | |
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| 269 | _Thread_Executing->current_state = |
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| 270 | _States_Set( extra_state, _Thread_Executing->current_state ); |
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| 271 | |
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| 272 | _Thread_Enable_dispatch(); |
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| 273 | |
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| 274 | return _Thread_Executing->Wait.return_code; |
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| 275 | } |
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| 276 | |
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| 277 | /*PAGE |
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| 278 | * |
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| 279 | * _MPCI_Send_response_packet |
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| 280 | * |
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| 281 | * This subprogram sends a response packet by invoking the user provided |
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| 282 | * MPCI send callout. |
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| 283 | */ |
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| 284 | |
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| 285 | void _MPCI_Send_response_packet ( |
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| 286 | unsigned32 destination, |
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[3a4ae6c] | 287 | MP_packet_Prefix *the_packet |
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[ac7d5ef0] | 288 | ) |
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| 289 | { |
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| 290 | the_packet->source_tid = _Thread_Executing->Object.id; |
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| 291 | |
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[3a4ae6c] | 292 | (*_MPCI_table->send_packet)( destination, the_packet ); |
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[ac7d5ef0] | 293 | } |
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| 294 | |
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| 295 | /*PAGE |
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| 296 | * |
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| 297 | * _MPCI_Receive_packet |
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| 298 | * |
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| 299 | * This subprogram receives a packet by invoking the user provided |
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| 300 | * MPCI receive callout. |
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| 301 | */ |
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| 302 | |
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[3a4ae6c] | 303 | MP_packet_Prefix *_MPCI_Receive_packet ( void ) |
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[ac7d5ef0] | 304 | { |
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[3a4ae6c] | 305 | MP_packet_Prefix *the_packet; |
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[ac7d5ef0] | 306 | |
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[3a4ae6c] | 307 | (*_MPCI_table->receive_packet)( &the_packet ); |
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[ac7d5ef0] | 308 | |
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| 309 | return the_packet; |
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| 310 | } |
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| 311 | |
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| 312 | /*PAGE |
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| 313 | * |
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| 314 | * _MPCI_Process_response |
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| 315 | * |
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| 316 | * This subprogram obtains a packet by invoking the user provided |
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| 317 | * MPCI get packet callout. |
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| 318 | */ |
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| 319 | |
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| 320 | Thread_Control *_MPCI_Process_response ( |
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[3a4ae6c] | 321 | MP_packet_Prefix *the_packet |
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[ac7d5ef0] | 322 | ) |
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| 323 | { |
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| 324 | Thread_Control *the_thread; |
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| 325 | Objects_Locations location; |
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| 326 | |
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| 327 | the_thread = _Thread_Get( the_packet->id, &location ); |
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| 328 | switch ( location ) { |
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| 329 | case OBJECTS_ERROR: |
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| 330 | case OBJECTS_REMOTE: |
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| 331 | the_thread = NULL; /* IMPOSSIBLE */ |
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| 332 | break; |
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| 333 | case OBJECTS_LOCAL: |
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| 334 | _Thread_queue_Extract( &_MPCI_Remote_blocked_threads, the_thread ); |
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| 335 | the_thread->Wait.return_code = the_packet->return_code; |
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| 336 | _Thread_Unnest_dispatch(); |
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| 337 | break; |
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| 338 | } |
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| 339 | |
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| 340 | return the_thread; |
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| 341 | } |
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| 342 | |
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[3a4ae6c] | 343 | /*PAGE |
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| 344 | * |
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| 345 | * _MPCI_Receive_server |
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| 346 | * |
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| 347 | */ |
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| 348 | |
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[adf98bd] | 349 | Thread _MPCI_Receive_server( |
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| 350 | unsigned32 ignored |
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| 351 | ) |
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[3a4ae6c] | 352 | { |
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| 353 | |
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| 354 | MP_packet_Prefix *the_packet; |
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| 355 | MPCI_Packet_processor the_function; |
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| 356 | Thread_Control *executing; |
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| 357 | |
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| 358 | executing = _Thread_Executing; |
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| 359 | |
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| 360 | for ( ; ; ) { |
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| 361 | |
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| 362 | executing->receive_packet = NULL; |
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| 363 | |
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| 364 | _Thread_Disable_dispatch(); |
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| 365 | _CORE_semaphore_Seize( &_MPCI_Semaphore, 0, TRUE, WATCHDOG_NO_TIMEOUT ); |
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| 366 | _Thread_Enable_dispatch(); |
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| 367 | |
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| 368 | for ( ; ; ) { |
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| 369 | the_packet = _MPCI_Receive_packet(); |
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| 370 | |
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| 371 | if ( !the_packet ) |
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| 372 | break; |
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| 373 | |
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| 374 | executing->receive_packet = the_packet; |
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| 375 | |
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| 376 | if ( !_Mp_packet_Is_valid_packet_class ( the_packet->the_class ) ) |
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| 377 | break; |
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| 378 | |
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| 379 | the_function = _MPCI_Packet_processors[ the_packet->the_class ]; |
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| 380 | |
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| 381 | if ( !the_function ) |
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| 382 | _Internal_error_Occurred( |
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| 383 | INTERNAL_ERROR_CORE, |
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| 384 | TRUE, |
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| 385 | INTERNAL_ERROR_BAD_PACKET |
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| 386 | ); |
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| 387 | |
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| 388 | (*the_function)( the_packet ); |
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| 389 | } |
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| 390 | } |
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| 391 | } |
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| 392 | |
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| 393 | /*PAGE |
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| 394 | * |
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| 395 | * _MPCI_Announce |
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| 396 | * |
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| 397 | */ |
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| 398 | |
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| 399 | void _MPCI_Announce ( void ) |
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| 400 | { |
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| 401 | _Thread_Disable_dispatch(); |
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| 402 | (void) _CORE_semaphore_Surrender( &_MPCI_Semaphore, 0, 0 ); |
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| 403 | _Thread_Enable_dispatch(); |
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| 404 | } |
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| 405 | |
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[adf98bd] | 406 | /*PAGE |
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| 407 | * |
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| 408 | * _MPCI_Internal_packets_Send_process_packet |
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| 409 | * |
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| 410 | */ |
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| 411 | |
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| 412 | void _MPCI_Internal_packets_Send_process_packet ( |
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| 413 | MPCI_Internal_Remote_operations operation |
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| 414 | ) |
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| 415 | { |
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| 416 | MPCI_Internal_packet *the_packet; |
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| 417 | |
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| 418 | switch ( operation ) { |
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| 419 | |
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| 420 | case MPCI_PACKETS_SYSTEM_VERIFY: |
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| 421 | |
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| 422 | the_packet = _MPCI_Internal_packets_Get_packet(); |
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| 423 | the_packet->Prefix.the_class = MP_PACKET_MPCI_INTERNAL; |
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| 424 | the_packet->Prefix.length = sizeof ( MPCI_Internal_packet ); |
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| 425 | the_packet->Prefix.to_convert = sizeof ( MPCI_Internal_packet ); |
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| 426 | the_packet->operation = operation; |
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| 427 | |
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| 428 | the_packet->maximum_nodes = _Objects_Maximum_nodes; |
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| 429 | |
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| 430 | the_packet->maximum_global_objects = _Objects_MP_Maximum_global_objects; |
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| 431 | |
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| 432 | _MPCI_Send_process_packet( MPCI_ALL_NODES, &the_packet->Prefix ); |
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| 433 | break; |
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| 434 | } |
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| 435 | } |
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| 436 | |
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| 437 | /*PAGE |
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| 438 | * |
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| 439 | * _MPCI_Internal_packets_Send_request_packet |
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| 440 | * |
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| 441 | * This subprogram is not needed since there are no request |
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| 442 | * packets to be sent by this manager. |
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| 443 | * |
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| 444 | */ |
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| 445 | |
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| 446 | /*PAGE |
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| 447 | * |
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| 448 | * _MPCI_Internal_packets_Send_response_packet |
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| 449 | * |
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| 450 | * This subprogram is not needed since there are no response |
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| 451 | * packets to be sent by this manager. |
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| 452 | * |
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| 453 | */ |
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| 454 | |
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| 455 | /*PAGE |
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| 456 | * |
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| 457 | * |
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| 458 | * _MPCI_Internal_packets_Process_packet |
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| 459 | * |
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| 460 | */ |
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| 461 | |
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| 462 | void _MPCI_Internal_packets_Process_packet ( |
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| 463 | MP_packet_Prefix *the_packet_prefix |
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| 464 | ) |
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| 465 | { |
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| 466 | MPCI_Internal_packet *the_packet; |
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| 467 | unsigned32 maximum_nodes; |
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| 468 | unsigned32 maximum_global_objects; |
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| 469 | |
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| 470 | the_packet = (MPCI_Internal_packet *) the_packet_prefix; |
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| 471 | |
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| 472 | switch ( the_packet->operation ) { |
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| 473 | |
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| 474 | case MPCI_PACKETS_SYSTEM_VERIFY: |
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| 475 | |
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| 476 | maximum_nodes = the_packet->maximum_nodes; |
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| 477 | maximum_global_objects = the_packet->maximum_global_objects; |
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| 478 | if ( maximum_nodes != _Objects_Maximum_nodes || |
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| 479 | maximum_global_objects != _Objects_MP_Maximum_global_objects ) { |
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| 480 | |
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| 481 | _MPCI_Return_packet( the_packet_prefix ); |
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| 482 | |
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| 483 | _Internal_error_Occurred( |
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| 484 | INTERNAL_ERROR_CORE, |
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| 485 | TRUE, |
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| 486 | INTERNAL_ERROR_INCONSISTENT_MP_INFORMATION |
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| 487 | ); |
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| 488 | } |
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| 489 | |
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| 490 | _MPCI_Return_packet( the_packet_prefix ); |
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| 491 | |
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| 492 | break; |
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| 493 | } |
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| 494 | } |
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| 495 | |
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| 496 | /*PAGE |
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| 497 | * |
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| 498 | * _MPCI_Internal_packets_Send_object_was_deleted |
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| 499 | * |
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| 500 | * This subprogram is not needed since there are no objects |
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| 501 | * deleted by this manager. |
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| 502 | * |
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| 503 | */ |
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| 504 | |
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| 505 | /*PAGE |
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| 506 | * |
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| 507 | * _MPCI_Internal_packets_Send_extract_proxy |
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| 508 | * |
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| 509 | * This subprogram is not needed since there are no objects |
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| 510 | * deleted by this manager. |
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| 511 | * |
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| 512 | */ |
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| 513 | |
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| 514 | /*PAGE |
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| 515 | * |
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| 516 | * _MPCI_Internal_packets_Get_packet |
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| 517 | * |
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| 518 | */ |
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| 519 | |
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| 520 | MPCI_Internal_packet *_MPCI_Internal_packets_Get_packet ( void ) |
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| 521 | { |
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| 522 | return ( (MPCI_Internal_packet *) _MPCI_Get_packet() ); |
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| 523 | } |
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| 524 | |
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[ac7d5ef0] | 525 | /* end of file */ |
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