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1 /*
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2 * Copyright 2011 OpenSourceStewardshipFoundation.org
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3 * Licensed under GNU General Public License version 2
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4 *
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5 * Author: seanhalle@yahoo.com
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6 *
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7 */
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8 #include "HWSim__PingPong__HWDef/HWSim__PingPong__HWDef.h"
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9
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10 /* is an expr resolves to an actual commPath struct instance
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11 */
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12 #define setCommPathValuesTo( commPath, fromElIdx, outPort, toElIdx, inPort)\
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13 do{\
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14 commPath->idxOfFromElem = fromElIdx; \
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15 commPath->idxOfFromOutPort = outPort; \
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16 commPath->idxOfToElem = toElIdx; \
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17 commPath->idxOfToInPort = inPort; \
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18 }while(0); //macro magic for namespace
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19
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20
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21
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22 HWSimActivityType* createPingPongActivityType ();
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23
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24 HWSimElem* createAPingPongElem (HWSimNetlist *netlist);
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25
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26 /*This file constructs the netlist for the Hello World circuit, which is
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27 * used during design and implementation of the HWSim language
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28 *
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29 *It has two elements, each with one input port and one output port, and
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30 * a single activity-type.
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31 *
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32 *The elements are cross-coupled, so output port of one connects to input
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33 * port of the other. The input port has a single trigger, which fires
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34 * the one activity-type.
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35 *
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36 *The activity does nothing, except send a NULL message on the output port.
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37 *The activity-sim-time and communication-sim-time are both constants.
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38 *
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39 *Note that elements are generic. They are specialized by declaring
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40 * inports and outports, and by registering triggers that fire particular
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41 * activity-types.
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42 */
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43 HWSimNetlist *createPingPongNetlist()
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44 { HWSimNetlist *netlist;
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45 HWSimCommPath **commPaths;
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46 HWSimElem **elems;
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47 int32 numElems;
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48 int32 numCommPaths;
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49
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50 netlist = malloc( sizeof(HWSimNetlist) );
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51 numElems= 2;
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52 elems = malloc( numElems * sizeof(HWSimElem *) );
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53 netlist->numElems = numElems;
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54 netlist->elems = elems;
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55 netlist->numActivityTypes = 1;
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56 netlist->activityTypes = malloc(netlist->numActivityTypes*sizeof(HWSimActivityType*));
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57
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58 netlist->activityTypes[PING_PONG_ACTIVITY] = createPingPongActivityType();
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59
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60 elems[0] = createAPingPongElem( netlist ); //use activity types from netlist
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61 elems[1] = createAPingPongElem( netlist );
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62
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63 //make reset trigger an action on one of the elements
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64 elems[1]->inPorts[-1].triggeredActivityType =
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65 netlist->activityTypes[PING_PONG_ACTIVITY];
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66
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67 /*OutPorts and InPorts may have many commPaths attached.
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68 * but an inPort only
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69 * has one kind of activity that all incoming communications trigger. That
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70 * activity can be zero time and then switch on the type of message then
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71 * end with a continuation, where the continuation activity is chosen by the
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72 * switch.
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73 *So, a commPath only connects an out port to an in port
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74 *The format is: sending elem-index, out-port, dest elem-index, in-port
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75 */
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76 numCommPaths = 2;
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77 commPaths = malloc( numCommPaths * sizeof(HWSimCommPath *) );
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78 netlist->numCommPaths= numCommPaths;
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79 netlist->commPaths= commPaths;
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80 //elem 0, out-port 0 to elem 1, in-port 0
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81 commPaths[0]= malloc(sizeof(HWSimCommPath));
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82 setCommPathValuesTo(commPaths[0],0,0,1,0);
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83 commPaths[0]->hasFixedTiming = TRUE;
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84 commPaths[0]->fixedFlightTime = 10; //all time is stated in (integer) units
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85
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86 //elem 1, out-port 0 to elem 0, in-port 0
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87 commPaths[1]= malloc(sizeof(HWSimCommPath));
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88 setCommPathValuesTo(commPaths[1], 1,0,0,0);
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89 commPaths[1]->hasFixedTiming = TRUE;
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90 commPaths[1]->fixedFlightTime = 10; //all time is stated in (integer) units
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91
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92 //TODO: decide how to do bidirectional commPaths, like connection to a bus
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93 // thinking make it two separate commPaths with guard between in-port and out-port
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94
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95 return netlist;
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96 }
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97
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98
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99 /*
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100 */
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101 void
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102 freePingPongNetlist (HWSimNetlist *netlist)
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103 { int i;
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104
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105 for( i = 0; i < netlist->numCommPaths; i++ )
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106 { free(netlist->commPaths[i]);
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107 }
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108 free(netlist->commPaths);
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109 for( i= 0; i < netlist->numElems; i++ )
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110 { HWSim_ext__free_inPortsArray( netlist->elems[i]->inPorts );
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111 free(netlist->elems[i]->outPorts);
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112 free(netlist->elems[i]);
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113 }
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114
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115 free(netlist->activityTypes);
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116 free(netlist->elems);
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117 free(netlist);
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118 }
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119
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120 HWSimElem *
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121 createAPingPongElem( HWSimNetlist *netlist )
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122 { HWSimElem *elem;
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123 elem = malloc( sizeof(HWSimElem) );
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124 elem->numInPorts = 1;
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125 elem->numOutPorts = 1;
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126 elem->inPorts = HWSim_ext__make_inPortsArray( elem->numInPorts );
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127 elem->inPorts[-1].triggeredActivityType = IDLE_SPAN; //reset port
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128 elem->inPorts[0].triggeredActivityType = netlist->activityTypes[PING_PONG_ACTIVITY];
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129 return elem;
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130 }
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131
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132 HWSimActivityType *
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133 createPingPongActivityType( )
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134 { HWSimActivityType *pingPongActivityType;
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135 pingPongActivityType = malloc( sizeof(HWSimActivityType) );
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136
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137 pingPongActivityType->hasBehavior = TRUE;
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138 pingPongActivityType->hasTiming = TRUE;
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139 pingPongActivityType->timingIsFixed = TRUE;
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140 pingPongActivityType->fixedTime = 10;
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141 pingPongActivityType->behaviorFn = &pingPongElem_PingActivity_behavior;
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142 return pingPongActivityType;
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143 }
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144
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