/**
* 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);
}
}
}
}
}
/**
* 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);
}
}