示例#1
0
  /**
   * Completes RegisterRead and RegisterWrite connections passed up to the top-level as side-band
   * ports and buses.
   *
   * @param design the Design which has Registers
   * @param frame the ConnectionFrame which describes the read/write connections
   */
  private void connectGlobalRegisters(Design design, ConnectionFrame frame) {
    // boolean isLittleEndian = EngineThread.getGenericJob()
    // .getUnscopedBooleanOptionValue(OptionRegistry.LITTLE_ENDIAN);

    for (Register register : design.getRegisters()) {
      List<Connection> readList = frame.getReadConnections(register);
      List<Connection> writeList = frame.getWriteConnections(register);

      if (readList.isEmpty() && writeList.isEmpty()) {
        continue;
      }

      Component regPhys = register.makePhysicalComponent(readList, writeList);
      if (register.getInputSwapper() != null) {
        design.getDesignModule().addComponent(register.getInputSwapper());
      }
      design.getDesignModule().addComponent(regPhys);
      if (register.getOutputSwapper() != null) {
        design.getDesignModule().addComponent(register.getOutputSwapper());
      }

      assert regPhys != null;

      if (!writeList.isEmpty()) {
        final Iterator<Port> writePortIter = regPhys.getDataPorts().iterator();
        for (Iterator<Connection> writeListIter = writeList.iterator(); writeListIter.hasNext(); ) {
          final RegisterWriteConnection writeConn = (RegisterWriteConnection) writeListIter.next();
          if (writeConn != null) {
            assert writePortIter.hasNext() : "Too few ports on register physical (enable)";
            final Port enablePort = writePortIter.next();
            assert writePortIter.hasNext() : "Too few ports on register physical (data)";
            final Port dataPort = writePortIter.next();
            enablePort.setBus(writeConn.getEnable());
            dataPort.setBus(writeConn.getData());
          }
        }
      }

      if (!readList.isEmpty()) {
        Bus registerResultBus = null;
        Exit physicalExit = regPhys.getExit(Exit.DONE);
        registerResultBus = physicalExit.getDataBuses().get(0);

        for (Connection connection : readList) {
          RegisterReadConnection rp = (RegisterReadConnection) connection;
          // The read connetion may be null because we had
          // to pad out the pairs in the connection list for
          // the referee.
          if (rp != null) {
            rp.getDataPort().setBus(registerResultBus);
          }
        }
      }
    }
  }
示例#2
0
  /**
   * The Design should be the first Visitable that is visited by the GlobalConnector, indicating the
   * initialization of processing.
   *
   * @param design Description of Parameter
   */
  @Override
  public void visit(Design design) {
    if (_schedule.db) {
      _schedule.ln(_schedule.GVISIT, "visiting design " + design);
    }
    final GenericJob job = EngineThread.getGenericJob();

    this.design = design;

    beginFrame();
    traverse(design);
    connectGlobalRegisters(design, getFrame());
    generateKickers();

    if (job.getUnscopedBooleanOptionValue(OptionRegistry.NO_BLOCK_IO)) {
      connectTasks(design);
    }

    design.accept(new MemoryConnectionVisitor());
    // Connect all SimplePinRead and SimplePinWrite accesses to
    // their targetted pins.
    design.accept(new SimplePinConnector());

    // Connect clock and reset to all design module elements. Do
    // this last in case any of the other connectors add global
    // level stuff.
    for (Component designComp : design.getDesignModule().getComponents()) {
      // Find the clock domain for each design level element and
      // connect the clock and/or reset pins.
      final String domainSpec =
          (String)
              ((OptionString) EngineThread.getGenericJob().getOption(OptionRegistry.CLOCK_DOMAIN))
                  .getValue(designComp.getSearchLabel());
      assert domainSpec != null : "No clock domain specifier found for " + designComp;
      design.getClockDomain(domainSpec).connectComponentToDomain(designComp);
    }
  }