[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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[08311cc3] | 5 | * COPYRIGHT (c) 1989-1999. |
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[ac7d5ef0] | 6 | * On-Line Applications Research Corporation (OAR). |
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| 7 | * |
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[98e4ebf5] | 8 | * The license and distribution terms for this file may be |
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| 9 | * found in the file LICENSE in this distribution or at |
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[03f2154e] | 10 | * http://www.OARcorp.com/rtems/license.html. |
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[ac7d5ef0] | 11 | * |
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| 12 | * $Id$ |
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| 13 | */ |
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| 14 | |
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| 15 | #include <rtems/system.h> |
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[5e9b32b] | 16 | #include <rtems/score/cpu.h> |
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| 17 | #include <rtems/score/interr.h> |
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[97e2729d] | 18 | #if defined(RTEMS_MULTIPROCESSING) |
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[5e9b32b] | 19 | #include <rtems/score/mpci.h> |
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| 20 | #include <rtems/score/mppkt.h> |
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[97e2729d] | 21 | #endif |
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[5e9b32b] | 22 | #include <rtems/score/states.h> |
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| 23 | #include <rtems/score/thread.h> |
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| 24 | #include <rtems/score/threadq.h> |
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| 25 | #include <rtems/score/tqdata.h> |
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| 26 | #include <rtems/score/watchdog.h> |
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| 27 | #include <rtems/score/sysstate.h> |
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| 28 | |
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| 29 | #include <rtems/score/coresem.h> |
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[3a4ae6c] | 30 | |
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[ac7d5ef0] | 31 | /*PAGE |
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| 32 | * |
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| 33 | * _MPCI_Handler_initialization |
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| 34 | * |
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| 35 | * This subprogram performs the initialization necessary for this handler. |
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| 36 | */ |
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| 37 | |
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[3a4ae6c] | 38 | void _MPCI_Handler_initialization( |
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[cda7ecc] | 39 | MPCI_Control *users_mpci_table, |
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| 40 | unsigned32 timeout_status |
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[3a4ae6c] | 41 | ) |
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[ac7d5ef0] | 42 | { |
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[3a4ae6c] | 43 | CORE_semaphore_Attributes attributes; |
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| 44 | |
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| 45 | if ( _System_state_Is_multiprocessing && !users_mpci_table ) |
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| 46 | _Internal_error_Occurred( |
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| 47 | INTERNAL_ERROR_CORE, |
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| 48 | TRUE, |
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| 49 | INTERNAL_ERROR_NO_MPCI |
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| 50 | ); |
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| 51 | |
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| 52 | _MPCI_table = users_mpci_table; |
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| 53 | |
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[adf98bd] | 54 | if ( !_System_state_Is_multiprocessing ) |
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| 55 | return; |
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| 56 | |
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| 57 | /* |
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| 58 | * Register the MP Process Packet routine. |
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| 59 | */ |
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| 60 | |
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| 61 | _MPCI_Register_packet_processor( |
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| 62 | MP_PACKET_MPCI_INTERNAL, |
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| 63 | _MPCI_Internal_packets_Process_packet |
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| 64 | ); |
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| 65 | |
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| 66 | /* |
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| 67 | * Create the counting semaphore used by the MPCI Receive Server. |
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| 68 | */ |
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| 69 | |
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[3a4ae6c] | 70 | attributes.discipline = CORE_SEMAPHORE_DISCIPLINES_FIFO; |
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| 71 | |
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| 72 | _CORE_semaphore_Initialize( |
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| 73 | &_MPCI_Semaphore, |
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| 74 | &attributes, /* the_semaphore_attributes */ |
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[ef9505a9] | 75 | 0 /* initial_value */ |
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[3a4ae6c] | 76 | ); |
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| 77 | |
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[ac7d5ef0] | 78 | _Thread_queue_Initialize( |
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| 79 | &_MPCI_Remote_blocked_threads, |
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[7f6a24ab] | 80 | THREAD_QUEUE_DISCIPLINE_FIFO, |
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| 81 | STATES_WAITING_FOR_RPC_REPLY, |
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[cda7ecc] | 82 | timeout_status |
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[ac7d5ef0] | 83 | ); |
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| 84 | } |
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| 85 | |
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[adf98bd] | 86 | /*PAGE |
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| 87 | * |
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| 88 | * _MPCI_Create_server |
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| 89 | * |
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| 90 | * This subprogram creates the MPCI receive server. |
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| 91 | */ |
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| 92 | |
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| 93 | char *_MPCI_Internal_name = "MPCI"; |
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| 94 | |
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| 95 | void _MPCI_Create_server( void ) |
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| 96 | { |
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| 97 | |
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| 98 | if ( !_System_state_Is_multiprocessing ) |
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| 99 | return; |
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| 100 | |
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| 101 | /* |
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| 102 | * Initialize the MPCI Receive Server |
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| 103 | */ |
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| 104 | |
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| 105 | _MPCI_Receive_server_tcb = _Thread_Internal_allocate(); |
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| 106 | |
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| 107 | _Thread_Initialize( |
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| 108 | &_Thread_Internal_information, |
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| 109 | _MPCI_Receive_server_tcb, |
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| 110 | NULL, /* allocate the stack */ |
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| 111 | MPCI_RECEIVE_SERVER_STACK_SIZE, |
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| 112 | CPU_ALL_TASKS_ARE_FP, |
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| 113 | PRIORITY_MINIMUM, |
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| 114 | FALSE, /* no preempt */ |
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[ebd40c0] | 115 | THREAD_CPU_BUDGET_ALGORITHM_NONE, |
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| 116 | NULL, /* no budget algorithm callout */ |
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[adf98bd] | 117 | 0, /* all interrupts enabled */ |
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| 118 | _MPCI_Internal_name |
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| 119 | ); |
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| 120 | |
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| 121 | _Thread_Start( |
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| 122 | _MPCI_Receive_server_tcb, |
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| 123 | THREAD_START_NUMERIC, |
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[1019ae4] | 124 | (void *) _MPCI_Receive_server, |
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[adf98bd] | 125 | NULL, |
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| 126 | 0 |
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| 127 | ); |
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| 128 | } |
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| 129 | |
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[ac7d5ef0] | 130 | /*PAGE |
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| 131 | * |
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| 132 | * _MPCI_Initialization |
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| 133 | * |
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| 134 | * This subprogram initializes the MPCI driver by |
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| 135 | * invoking the user provided MPCI initialization callout. |
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| 136 | */ |
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| 137 | |
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| 138 | void _MPCI_Initialization ( void ) |
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| 139 | { |
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[3a4ae6c] | 140 | (*_MPCI_table->initialization)(); |
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| 141 | } |
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| 142 | |
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| 143 | /*PAGE |
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| 144 | * |
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| 145 | * _MPCI_Register_packet_processor |
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| 146 | * |
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| 147 | * This routine registers the MPCI packet processor for the |
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| 148 | * designated object class. |
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| 149 | */ |
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| 150 | |
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| 151 | void _MPCI_Register_packet_processor( |
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[3fd3da4] | 152 | MP_packet_Classes the_class, |
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[3a4ae6c] | 153 | MPCI_Packet_processor the_packet_processor |
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| 154 | |
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| 155 | ) |
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| 156 | { |
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| 157 | _MPCI_Packet_processors[ the_class ] = the_packet_processor; |
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[ac7d5ef0] | 158 | } |
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| 159 | |
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| 160 | /*PAGE |
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| 161 | * |
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| 162 | * _MPCI_Get_packet |
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| 163 | * |
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| 164 | * This subprogram obtains a packet by invoking the user provided |
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| 165 | * MPCI get packet callout. |
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| 166 | */ |
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| 167 | |
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[3a4ae6c] | 168 | MP_packet_Prefix *_MPCI_Get_packet ( void ) |
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[ac7d5ef0] | 169 | { |
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[3a4ae6c] | 170 | MP_packet_Prefix *the_packet; |
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[ac7d5ef0] | 171 | |
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[3a4ae6c] | 172 | (*_MPCI_table->get_packet)( &the_packet ); |
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[ac7d5ef0] | 173 | |
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| 174 | if ( the_packet == NULL ) |
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[3a4ae6c] | 175 | _Internal_error_Occurred( |
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| 176 | INTERNAL_ERROR_CORE, |
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| 177 | TRUE, |
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| 178 | INTERNAL_ERROR_OUT_OF_PACKETS |
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| 179 | ); |
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[ac7d5ef0] | 180 | |
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| 181 | /* |
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| 182 | * Put in a default timeout that will be used for |
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| 183 | * all packets that do not otherwise have a timeout. |
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| 184 | */ |
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| 185 | |
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| 186 | the_packet->timeout = MPCI_DEFAULT_TIMEOUT; |
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| 187 | |
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| 188 | return the_packet; |
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| 189 | } |
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| 190 | |
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| 191 | /*PAGE |
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| 192 | * |
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| 193 | * _MPCI_Return_packet |
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| 194 | * |
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| 195 | * This subprogram returns a packet by invoking the user provided |
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| 196 | * MPCI return packet callout. |
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| 197 | */ |
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| 198 | |
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| 199 | void _MPCI_Return_packet ( |
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[3a4ae6c] | 200 | MP_packet_Prefix *the_packet |
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[ac7d5ef0] | 201 | ) |
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| 202 | { |
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[3a4ae6c] | 203 | (*_MPCI_table->return_packet)( the_packet ); |
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[ac7d5ef0] | 204 | } |
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| 205 | |
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| 206 | /*PAGE |
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| 207 | * |
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| 208 | * _MPCI_Send_process_packet |
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| 209 | * |
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| 210 | * This subprogram sends a process packet by invoking the user provided |
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| 211 | * MPCI send callout. |
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| 212 | */ |
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| 213 | |
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| 214 | void _MPCI_Send_process_packet ( |
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| 215 | unsigned32 destination, |
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[3a4ae6c] | 216 | MP_packet_Prefix *the_packet |
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[ac7d5ef0] | 217 | ) |
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| 218 | { |
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| 219 | the_packet->source_tid = _Thread_Executing->Object.id; |
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| 220 | the_packet->to_convert = |
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[3a4ae6c] | 221 | ( the_packet->to_convert - sizeof(MP_packet_Prefix) ) / |
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[ac7d5ef0] | 222 | sizeof(unsigned32); |
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| 223 | |
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[3a4ae6c] | 224 | (*_MPCI_table->send_packet)( destination, the_packet ); |
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[ac7d5ef0] | 225 | } |
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| 226 | |
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| 227 | /*PAGE |
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| 228 | * |
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| 229 | * _MPCI_Send_request_packet |
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| 230 | * |
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| 231 | * This subprogram sends a request packet by invoking the user provided |
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| 232 | * MPCI send callout. |
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| 233 | */ |
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| 234 | |
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[3a4ae6c] | 235 | unsigned32 _MPCI_Send_request_packet ( |
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[ac7d5ef0] | 236 | unsigned32 destination, |
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[3a4ae6c] | 237 | MP_packet_Prefix *the_packet, |
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[ac7d5ef0] | 238 | States_Control extra_state |
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| 239 | ) |
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| 240 | { |
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| 241 | the_packet->source_tid = _Thread_Executing->Object.id; |
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| 242 | the_packet->source_priority = _Thread_Executing->current_priority; |
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| 243 | the_packet->to_convert = |
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[3a4ae6c] | 244 | ( the_packet->to_convert - sizeof(MP_packet_Prefix) ) / |
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[ac7d5ef0] | 245 | sizeof(unsigned32); |
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| 246 | |
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| 247 | _Thread_Executing->Wait.id = the_packet->id; |
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| 248 | |
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| 249 | _Thread_Executing->Wait.queue = &_MPCI_Remote_blocked_threads; |
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| 250 | |
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| 251 | _Thread_Disable_dispatch(); |
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| 252 | |
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[3a4ae6c] | 253 | (*_MPCI_table->send_packet)( destination, the_packet ); |
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[ac7d5ef0] | 254 | |
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[67d224a] | 255 | _Thread_queue_Enter_critical_section( &_MPCI_Remote_blocked_threads ); |
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[ac7d5ef0] | 256 | |
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| 257 | /* |
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| 258 | * See if we need a default timeout |
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| 259 | */ |
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| 260 | |
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| 261 | if (the_packet->timeout == MPCI_DEFAULT_TIMEOUT) |
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[3a4ae6c] | 262 | the_packet->timeout = _MPCI_table->default_timeout; |
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[ac7d5ef0] | 263 | |
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| 264 | _Thread_queue_Enqueue( &_MPCI_Remote_blocked_threads, the_packet->timeout ); |
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| 265 | |
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| 266 | _Thread_Executing->current_state = |
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| 267 | _States_Set( extra_state, _Thread_Executing->current_state ); |
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| 268 | |
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| 269 | _Thread_Enable_dispatch(); |
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| 270 | |
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| 271 | return _Thread_Executing->Wait.return_code; |
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| 272 | } |
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| 273 | |
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| 274 | /*PAGE |
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| 275 | * |
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| 276 | * _MPCI_Send_response_packet |
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| 277 | * |
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| 278 | * This subprogram sends a response packet by invoking the user provided |
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| 279 | * MPCI send callout. |
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| 280 | */ |
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| 281 | |
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| 282 | void _MPCI_Send_response_packet ( |
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| 283 | unsigned32 destination, |
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[3a4ae6c] | 284 | MP_packet_Prefix *the_packet |
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[ac7d5ef0] | 285 | ) |
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| 286 | { |
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| 287 | the_packet->source_tid = _Thread_Executing->Object.id; |
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| 288 | |
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[3a4ae6c] | 289 | (*_MPCI_table->send_packet)( destination, the_packet ); |
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[ac7d5ef0] | 290 | } |
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| 291 | |
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| 292 | /*PAGE |
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| 293 | * |
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| 294 | * _MPCI_Receive_packet |
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| 295 | * |
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| 296 | * This subprogram receives a packet by invoking the user provided |
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| 297 | * MPCI receive callout. |
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| 298 | */ |
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| 299 | |
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[3a4ae6c] | 300 | MP_packet_Prefix *_MPCI_Receive_packet ( void ) |
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[ac7d5ef0] | 301 | { |
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[3a4ae6c] | 302 | MP_packet_Prefix *the_packet; |
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[ac7d5ef0] | 303 | |
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[3a4ae6c] | 304 | (*_MPCI_table->receive_packet)( &the_packet ); |
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[ac7d5ef0] | 305 | |
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| 306 | return the_packet; |
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| 307 | } |
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| 308 | |
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| 309 | /*PAGE |
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| 310 | * |
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| 311 | * _MPCI_Process_response |
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| 312 | * |
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| 313 | * This subprogram obtains a packet by invoking the user provided |
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| 314 | * MPCI get packet callout. |
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| 315 | */ |
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| 316 | |
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| 317 | Thread_Control *_MPCI_Process_response ( |
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[3a4ae6c] | 318 | MP_packet_Prefix *the_packet |
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[ac7d5ef0] | 319 | ) |
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| 320 | { |
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| 321 | Thread_Control *the_thread; |
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| 322 | Objects_Locations location; |
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| 323 | |
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| 324 | the_thread = _Thread_Get( the_packet->id, &location ); |
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| 325 | switch ( location ) { |
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| 326 | case OBJECTS_ERROR: |
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| 327 | case OBJECTS_REMOTE: |
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| 328 | the_thread = NULL; /* IMPOSSIBLE */ |
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| 329 | break; |
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| 330 | case OBJECTS_LOCAL: |
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| 331 | _Thread_queue_Extract( &_MPCI_Remote_blocked_threads, the_thread ); |
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| 332 | the_thread->Wait.return_code = the_packet->return_code; |
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| 333 | _Thread_Unnest_dispatch(); |
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| 334 | break; |
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| 335 | } |
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| 336 | |
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| 337 | return the_thread; |
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| 338 | } |
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| 339 | |
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[3a4ae6c] | 340 | /*PAGE |
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| 341 | * |
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| 342 | * _MPCI_Receive_server |
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| 343 | * |
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| 344 | */ |
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| 345 | |
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[adf98bd] | 346 | Thread _MPCI_Receive_server( |
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| 347 | unsigned32 ignored |
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| 348 | ) |
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[3a4ae6c] | 349 | { |
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| 350 | |
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| 351 | MP_packet_Prefix *the_packet; |
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| 352 | MPCI_Packet_processor the_function; |
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| 353 | Thread_Control *executing; |
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| 354 | |
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| 355 | executing = _Thread_Executing; |
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| 356 | |
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| 357 | for ( ; ; ) { |
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| 358 | |
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| 359 | executing->receive_packet = NULL; |
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| 360 | |
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| 361 | _Thread_Disable_dispatch(); |
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| 362 | _CORE_semaphore_Seize( &_MPCI_Semaphore, 0, TRUE, WATCHDOG_NO_TIMEOUT ); |
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| 363 | _Thread_Enable_dispatch(); |
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| 364 | |
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| 365 | for ( ; ; ) { |
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| 366 | the_packet = _MPCI_Receive_packet(); |
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| 367 | |
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| 368 | if ( !the_packet ) |
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| 369 | break; |
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| 370 | |
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| 371 | executing->receive_packet = the_packet; |
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| 372 | |
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| 373 | if ( !_Mp_packet_Is_valid_packet_class ( the_packet->the_class ) ) |
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| 374 | break; |
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| 375 | |
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| 376 | the_function = _MPCI_Packet_processors[ the_packet->the_class ]; |
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| 377 | |
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| 378 | if ( !the_function ) |
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| 379 | _Internal_error_Occurred( |
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| 380 | INTERNAL_ERROR_CORE, |
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| 381 | TRUE, |
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| 382 | INTERNAL_ERROR_BAD_PACKET |
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| 383 | ); |
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| 384 | |
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| 385 | (*the_function)( the_packet ); |
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| 386 | } |
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| 387 | } |
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[b041968] | 388 | |
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| 389 | return 0; /* unreached - only to remove warnings */ |
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[3a4ae6c] | 390 | } |
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| 391 | |
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| 392 | /*PAGE |
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| 393 | * |
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| 394 | * _MPCI_Announce |
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| 395 | * |
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| 396 | */ |
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| 397 | |
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| 398 | void _MPCI_Announce ( void ) |
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| 399 | { |
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| 400 | _Thread_Disable_dispatch(); |
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| 401 | (void) _CORE_semaphore_Surrender( &_MPCI_Semaphore, 0, 0 ); |
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| 402 | _Thread_Enable_dispatch(); |
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| 403 | } |
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| 404 | |
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[adf98bd] | 405 | /*PAGE |
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| 406 | * |
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| 407 | * _MPCI_Internal_packets_Send_process_packet |
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| 408 | * |
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| 409 | */ |
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| 410 | |
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| 411 | void _MPCI_Internal_packets_Send_process_packet ( |
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| 412 | MPCI_Internal_Remote_operations operation |
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| 413 | ) |
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| 414 | { |
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| 415 | MPCI_Internal_packet *the_packet; |
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| 416 | |
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| 417 | switch ( operation ) { |
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| 418 | |
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| 419 | case MPCI_PACKETS_SYSTEM_VERIFY: |
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| 420 | |
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| 421 | the_packet = _MPCI_Internal_packets_Get_packet(); |
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| 422 | the_packet->Prefix.the_class = MP_PACKET_MPCI_INTERNAL; |
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| 423 | the_packet->Prefix.length = sizeof ( MPCI_Internal_packet ); |
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| 424 | the_packet->Prefix.to_convert = sizeof ( MPCI_Internal_packet ); |
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| 425 | the_packet->operation = operation; |
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| 426 | |
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| 427 | the_packet->maximum_nodes = _Objects_Maximum_nodes; |
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| 428 | |
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| 429 | the_packet->maximum_global_objects = _Objects_MP_Maximum_global_objects; |
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| 430 | |
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| 431 | _MPCI_Send_process_packet( MPCI_ALL_NODES, &the_packet->Prefix ); |
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| 432 | break; |
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| 433 | } |
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| 434 | } |
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| 435 | |
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| 436 | /*PAGE |
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| 437 | * |
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| 438 | * _MPCI_Internal_packets_Send_request_packet |
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| 439 | * |
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| 440 | * This subprogram is not needed since there are no request |
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| 441 | * packets to be sent by this manager. |
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| 442 | * |
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| 443 | */ |
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| 444 | |
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| 445 | /*PAGE |
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| 446 | * |
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| 447 | * _MPCI_Internal_packets_Send_response_packet |
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| 448 | * |
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| 449 | * This subprogram is not needed since there are no response |
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| 450 | * packets to be sent by this manager. |
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| 451 | * |
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| 452 | */ |
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| 453 | |
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| 454 | /*PAGE |
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| 455 | * |
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| 456 | * |
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| 457 | * _MPCI_Internal_packets_Process_packet |
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| 458 | * |
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| 459 | */ |
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| 460 | |
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| 461 | void _MPCI_Internal_packets_Process_packet ( |
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| 462 | MP_packet_Prefix *the_packet_prefix |
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| 463 | ) |
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| 464 | { |
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| 465 | MPCI_Internal_packet *the_packet; |
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| 466 | unsigned32 maximum_nodes; |
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| 467 | unsigned32 maximum_global_objects; |
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| 468 | |
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| 469 | the_packet = (MPCI_Internal_packet *) the_packet_prefix; |
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| 470 | |
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| 471 | switch ( the_packet->operation ) { |
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| 472 | |
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| 473 | case MPCI_PACKETS_SYSTEM_VERIFY: |
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| 474 | |
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| 475 | maximum_nodes = the_packet->maximum_nodes; |
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| 476 | maximum_global_objects = the_packet->maximum_global_objects; |
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| 477 | if ( maximum_nodes != _Objects_Maximum_nodes || |
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| 478 | maximum_global_objects != _Objects_MP_Maximum_global_objects ) { |
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| 479 | |
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| 480 | _MPCI_Return_packet( the_packet_prefix ); |
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| 481 | |
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| 482 | _Internal_error_Occurred( |
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| 483 | INTERNAL_ERROR_CORE, |
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| 484 | TRUE, |
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| 485 | INTERNAL_ERROR_INCONSISTENT_MP_INFORMATION |
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| 486 | ); |
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| 487 | } |
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| 488 | |
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| 489 | _MPCI_Return_packet( the_packet_prefix ); |
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| 490 | |
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| 491 | break; |
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| 492 | } |
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| 493 | } |
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| 494 | |
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| 495 | /*PAGE |
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| 496 | * |
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| 497 | * _MPCI_Internal_packets_Send_object_was_deleted |
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| 498 | * |
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| 499 | * This subprogram is not needed since there are no objects |
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| 500 | * deleted by this manager. |
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| 501 | * |
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| 502 | */ |
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| 503 | |
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| 504 | /*PAGE |
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| 505 | * |
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| 506 | * _MPCI_Internal_packets_Send_extract_proxy |
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| 507 | * |
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| 508 | * This subprogram is not needed since there are no objects |
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| 509 | * deleted by this manager. |
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| 510 | * |
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| 511 | */ |
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| 512 | |
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| 513 | /*PAGE |
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| 514 | * |
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| 515 | * _MPCI_Internal_packets_Get_packet |
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| 516 | * |
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| 517 | */ |
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| 518 | |
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| 519 | MPCI_Internal_packet *_MPCI_Internal_packets_Get_packet ( void ) |
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| 520 | { |
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| 521 | return ( (MPCI_Internal_packet *) _MPCI_Get_packet() ); |
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| 522 | } |
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| 523 | |
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[ac7d5ef0] | 524 | /* end of file */ |
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