protected Bus duplicateBus(Component c, Bus bus) {
Exit exit = getSidebandExit(c);
Bus dup = exit.makeDataBus(Component.SIDEBAND);
dup.setIDLogical(ID.showLogical(bus));
dup.copyAttributes(bus);
return dup;
}
/**
* Utility method for wiring up the reads and writes captured in a frame to appropriate ports and
* buses on a procedure.
*
* @param body DOCUMENT ME!
* @param register DOCUMENT ME!
* @param subFrame DOCUMENT ME!
*/
private void connectRegister(Module body, Register register, ConnectionFrame subFrame) {
// wire all the reads to a new port on the procedure's body
List<Connection> readList = subFrame.getReadConnections(register);
if (!readList.isEmpty()) {
Port resourceRead = body.makeDataPort(Component.SIDEBAND);
Bus resourceReadBus = resourceRead.getPeer();
resourceReadBus.setIDLogical(register.showIDLogical() + "_read");
resourceReadBus.setSize(register.getInitWidth(), Register.isSigned());
recordRead(new RegisterReadConnection(register, resourceRead));
for (Connection readConnections : readList) {
RegisterReadConnection rp = (RegisterReadConnection) readConnections;
rp.getDataPort().setBus(resourceReadBus);
}
}
// wire the writes. a single write goes directly, multiple go through a
// gateway
List<Connection> writeList = subFrame.getWriteConnections(register);
if (!writeList.isEmpty()) {
Exit bodyExit = getSidebandExit(body);
Bus writeEnable = bodyExit.makeDataBus(Component.SIDEBAND);
writeEnable.setIDLogical(register.showIDLogical() + "_enable");
writeEnable.setSize(1, false);
// Port writeEnablePort = writeEnable.getPeer();
Bus writeData = bodyExit.makeDataBus(Component.SIDEBAND);
writeData.setIDLogical(register.showIDLogical() + "_write");
writeData.setSize(register.getInitWidth(), Register.isSigned());
recordWrite(new RegisterWriteConnection(register, writeEnable, writeData));
if (writeList.size() == 1) {
RegisterWriteConnection edp = (RegisterWriteConnection) writeList.get(0);
writeEnable.getPeer().setBus(edp.getEnable());
writeData.getPeer().setBus(edp.getData());
} else {
RegisterGateway regGateway = new RegisterGateway(writeList.size(), register);
writeEnable.getPeer().setBus(regGateway.getGlobalEnableBus());
writeData.getPeer().setBus(regGateway.getGlobalDataBus());
Iterator<Port> gatewayLocalEnablePortIter = regGateway.getLocalEnablePorts().iterator();
Iterator<Port> gatewayLocalDataPortIter = regGateway.getLocalDataPorts().iterator();
// Wires up RegisterGateway's enable ports paired with data
// ports.
int pairCount = 0;
for (Connection connection : writeList) {
RegisterWriteConnection edPair = (RegisterWriteConnection) connection;
edPair.getEnable().setIDLogical(register.showIDLogical() + "_we_" + pairCount);
gatewayLocalEnablePortIter.next().setBus(edPair.getEnable());
edPair.getData().setIDLogical(register.showIDLogical() + "_data_" + pairCount);
gatewayLocalDataPortIter.next().setBus(edPair.getData());
// edPair.getSize().setIDLogical(register.showIDLogical() +
// "_size_" + pairCount);
// ((Port)gatewayLocalSizePortIter.next()).setBus(edPair.getSize());
pairCount++;
}
body.addComponent(regGateway);
}
}
}