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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__Hello_World_HW/HWSim__Hello_World_HW.h"
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9
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10 /*'wire' is an expr resolves to an actual wire struct instance
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11 */
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12 #define setWireValuesTo( wire, fromTLIdx, outPort, toTLIdx, inPort, dataPtr)\
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13 do{\
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14 wire.idxOfFromTimeline = fromTLIdx; \
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15 wire.idxOfFromOutPort = fromTLIdx; \
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16 wire.idxOfToTimeline = toTLIdx; \
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17 wire.idxOfToInPort = inPort; \
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18 wire.archSpecWireData = dataPtr; \
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19 }while(0); //macro magic for namespace
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20
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21 /*This file constructs the netlist for the Hello World circuit, which is
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22 * used during design and implementation of the HWSim language
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23 *
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24 *It has two timelines, each with one input port and one output port, and
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25 * a single span-type.
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26 *
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27 *The timelines are cross-coupled, so output port of one connects to input
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28 * port of the other. The input port has a single trigger, which fires
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29 * the one span-type.
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30 *
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31 *The span does nothing, except send a NULL message on the output port.
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32 *The span-sim-time and communication-sim-time are both constants.
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33 *
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34 *Note that timelines are generic. They are specialized by declaring
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35 * inports and outports, and by registering triggers that fire particular
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36 * span-types.
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37 */
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38 HWSimNetlist *createPingPongNetlist()
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39 { HWSimNetlist *netlist;
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40 NetlistWire *wires;
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41 HWSimTimeline **timelines;
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42 int numTimelines;
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43 int numWires;
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44
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45 netlist = malloc( sizeof(HWSimNetlist) );
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46 //declare timelines numTimelines = 2;
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47 timelines = malloc( numTimelines * sizeof(HWSimTimeline) );
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48 netlist->numTimelines = numTimelines;
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49 netlist->timelines = timelines;
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50 netlist->numSpanTypes = 1;
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51 netlist->spanTypes = malloc(netlist->numSpanTypes*sizeof(HWSimSpanType*));
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52 netlist->spanTypes[PING_PONG_TYPE] = createPingPongSpanType();
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53 timelines[0] = createAPingPongTimeline( netlist ); //use info from netlist
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54 timelines[1] = createAPingPongTimeline( netlist );
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55 //on one of the timelines, make reset trigger an action
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56 timelines[1]->inPorts[-1].triggeredSpanType =
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57 netlist->spanTypes PING_PONG_TYPE]; //Connect timelines together
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58
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59 /*OutPorts and InPorts may have many wires attached, but an inPort only
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60 * has one kind of span that all incoming communications trigger. That
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61 * span can be zero time and then switch on the type of message then
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62 * end with a continuation, where the continuation span is chosen by the
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63 * switch.
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64 *So, a wire only connects an out port to an in port
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65 *The format is: sending TL-index, out-port, dest TL-index, in-port
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66 */
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67 numWires = 2;
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68 wires = malloc( numWires * sizeof(NetlistWire) );
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69 netlist->numWires = numWires;
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70 netlist->wires = wires;
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71 //TL 0, out-port 0 to TL 1, in-port 0
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72 setWireValuesTo(wires[0], 0,0,1,0, NULL); //These NetlistWires turned into
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73 setWireValuesTo(wires[1], 1,0,0,0, NULL); // HWSimWires inside ckt create
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74 //TODO: decide how do in-out bidirectional wires -- thinking make it two
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75 // separate wires with guard between in-port and out-port
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76 //TODO: decide how do guards between ports
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77 }
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78
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79 //Note: copy netlist struct with VMS malloc after VMS initialized
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80 HWSimTimeline *
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81 createAPingPongTimeline( HWSimNetlist *netlist )
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82 { HWSimTimeline *TL;
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83 TL = malloc( sizeof(HWSimTimeline) );
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84 TL->numInPorts = 1;
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85 TL->numOutPorts = 1;
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86 TL->inPorts = HWSim_ext__make_inPortsArray( TL->numInPorts );
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87 TL->inPorts[-1].triggeredSpanType = IDLE_SPAN; //reset port
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88 TL->inPorts[0].triggeredSpanType = netlist->spanTypes[PING_PONG_TYPE];
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89 }
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90
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91 HWSimSpanType *
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92 createPingPongSpanType( )
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93 { HWSimSpanType *pingPongSpanType;
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94 pingPongSpanType = malloc( sizeof(HWSimSpanType) );
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95 pingPongSpanType->behaviorFn = &behaviorOf_ping_pong_span;
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96 pingPongSpanType->timingFn = &timingOf_ping_pong_span;
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97 return pingPongSpanType;
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98 }
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99 |
