OutputPSocketBroker.cc

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/*
    Copyright (c) 2002-2009 Tampere University.
 
    This file is part of TTA-Based Codesign Environment (TCE).
 
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/**
 * @file OutputPSocketBroker.cc
 *
 * Implementation of OutputPSocketBroker class.
 *
 * @author Ari Mets�halme 2006 (ari.metsahalme-no.spam-tut.fi)
 * @author Vladimir Guzma 2007 (vladimir.guzma-no.spam-tut.fi)
 * @note rating: red
 */
 
#include "OutputPSocketBroker.hh"
#include "OutputPSocketResource.hh"
#include "ResourceMapper.hh"
#include "Machine.hh"
#include "Segment.hh"
#include "Terminal.hh"
#include "MapTools.hh"
#include "Move.hh"
#include "TerminalRegister.hh"
#include "MoveNode.hh"
 
using std::string;
 
using namespace TTAMachine;
using namespace TTAProgram;
 
/**
 * Constructor.
 *
 * @param name name for this broker.
 * @param fub reference to OutputFUBroker of this resource manager.
 * @param initiationInterval initiationinterval when doing loop scheduling.
 */
OutputPSocketBroker::OutputPSocketBroker(
    std::string name,
    ResourceBroker& fub,
    SimpleResourceManager* rm,
    unsigned int initiationInterval) : 
    ResourceBroker(name, initiationInterval), 
    outputFUBroker_(fub), busBroker_(NULL), rm_(rm) {
}
 
/**
 * Destructor.
 */
OutputPSocketBroker::~OutputPSocketBroker(){
}
 
/**
 * Return all resources managed by this broker that can be assigned to
 * the given node in the given cycle.
 *
 * @param cycle Cycle.
 * @param node Node.
 * @return All resources managed by this broker that can be assigned to
 * the given node in the given cycle.
 */
SchedulingResourceSet
OutputPSocketBroker::allAvailableResources(
    int cycle,
    const MoveNode& node,
    const TTAMachine::Bus* preassignedBus,
    const TTAMachine::FunctionUnit*,
    const TTAMachine::FunctionUnit*,
    int,
    const TTAMachine::ImmediateUnit*, int) const {
 
    cycle = instructionIndex(cycle);
    if (!isApplicable(node, preassignedBus)) {
        string msg = "Broker not capable of assigning resources to node!";
        throw ModuleRunTimeError(__FILE__, __LINE__, __func__, msg);
    }
 
    TTAProgram::Move& move = const_cast<MoveNode&>(node).move();
 
    SchedulingResourceSet resourceSet;
 
    if (move.source().isFUPort()) {
        // psocket is implicit by fubroker choice of FU
        Socket& outputSocket = *move.source().port().outputSocket();
        SchedulingResource* res = resourceOf(outputSocket);
        if (res->canAssign(cycle,node)) {
            resourceSet.insert(*res);
        }
        return resourceSet;
    }
    if (move.source().isGPR()) {
        // assign psocket for reading rf
        const RegisterFile& rf = move.source().registerFile();
        for (int i = 0; i < rf.portCount(); i++) {
            Port& port = *rf.port(i);
            Socket* outputSocket = port.outputSocket();
            
            if (outputSocket != NULL) {
                SchedulingResource* res = resourceOf(*outputSocket);
                if (res->canAssign(cycle, node)) {
                    resourceSet.insert(*res);
                }
            }
        }
        return resourceSet;
    }
    if (move.source().isImmediateRegister()) {
        // assign psocket for reading IU
        const ImmediateUnit& iu = move.source().immediateUnit();
        for (int i = 0; i < iu.portCount(); i++) {
            Port& port = *iu.port(i);
            Socket* outputSocket = port.outputSocket();
            if (outputSocket != NULL) {
                SchedulingResource* res = resourceOf(*outputSocket);
                if (res->canAssign(cycle, node)) {
                    resourceSet.insert(*res);
                }
            }
        }
    }
    return resourceSet;
}
 
/**
 * Return true if one of the resources managed by this broker is
 * suitable for the request contained in the node and can be assigned
 * to it in given cycle.
 *
 * @param cycle Cycle.
 * @param node Node.
 * @return True if one of the resources managed by this broker is
 * suitable for the request contained in the node and can be assigned
 * to it in given cycle.
 */
bool
OutputPSocketBroker::isAnyResourceAvailable(
    int cycle, const MoveNode& node,
    const TTAMachine::Bus* preassignedBus,
    const TTAMachine::FunctionUnit*,
    const TTAMachine::FunctionUnit*, int,
    const TTAMachine::ImmediateUnit*, int) const {
 
    cycle = instructionIndex(cycle);
    if (!isApplicable(node, preassignedBus)) {
        string msg = "Broker not capable of assigning resources to node!";
        throw ModuleRunTimeError(__FILE__, __LINE__, __func__, msg);
    }
 
    TTAProgram::Move& move = const_cast<MoveNode&>(node).move();
 
    SchedulingResourceSet resourceSet;
 
    if (move.source().isFUPort()) {
        // psocket is implicit by fubroker choice of FU
        Socket& outputSocket = *move.source().port().outputSocket();
        SchedulingResource* res = resourceOf(outputSocket);
        if (res->canAssign(cycle,node)) {
            return true;
        } else {
            return false;
        }
    }
    if (move.source().isGPR()) {
        // assign psocket for reading rf
        const RegisterFile& rf = move.source().registerFile();
        for (int i = 0; i < rf.portCount(); i++) {
            Port& port = *rf.port(i);
            Socket* outputSocket = port.outputSocket();
            
            if (outputSocket != NULL) {
                SchedulingResource* res = resourceOf(*outputSocket);
                if (res->canAssign(cycle, node)) {
                    return true;
                }
            }
        }
        return false;
    }
    if (move.source().isImmediateRegister()) {
        // assign psocket for reading IU
        const ImmediateUnit& iu = move.source().immediateUnit();
        for (int i = 0; i < iu.portCount(); i++) {
            Port& port = *iu.port(i);
            Socket* outputSocket = port.outputSocket();
            if (outputSocket != NULL) {
                SchedulingResource* res = resourceOf(*outputSocket);
                if (res->canAssign(cycle, node)) {
                    return true;
                }
            }
        }
        return false;
    }
    return false;
}
 
 
 
 
 
 
/**
 * Mark given resource as in use for the given node, and assign the
 * corresponding machine part (if applicable) to the node's move.
 *
 * If the node is already assigned to given resource, this method does
 * nothing.
 *
 * @param cycle Cycle.
 * @param node Node to assign.
 * @param res Resource representing Output PSocket
 * @exception WrongSubclass If this broker does not recognise the given
 * type of resource.
 * @exception InvalidParameters If he given resource cannot be assigned to
 * given node or no corresponding machine part is found.
 */
void
OutputPSocketBroker::assign(
    int cycle,
    MoveNode& node,
    SchedulingResource& res,
    int, int) {
 
    cycle = instructionIndex(cycle);
    if (!hasResource(res)) {
        string msg = "Broker does not contain given resource.";
        throw InvalidData(__FILE__, __LINE__, __func__, msg);
    }
 
    TTAProgram::Move& move = node.move();
 
    if (move.source().isGPR() || move.source().isImmediateRegister()) {
 
        Port* port = NULL;
        const Socket& socket =
            static_cast<const Socket&>(machinePartOf(res));
        for (int i = 0; i < socket.portCount(); i++) {
            if (socket.port(i)->outputSocket() == &socket) {
                if ((move.source().isGPR() &&
                     socket.port(i)->parentUnit() !=
                     &move.source().registerFile()) ||
                    (move.source().isImmediateRegister() &&
                     socket.port(i)->parentUnit() !=
                     &move.source().immediateUnit()))
                    continue;
                port = socket.port(i);
                break;
            }
        }
        if (port == NULL) {
            throw InvalidData(
                __FILE__, __LINE__, __func__, 
                "Broker can not find necesary Port!");
        }
        TTAProgram::TerminalRegister* newSrc = new TerminalRegister(
            *port, move.source().index());
        move.setSource(newSrc);
    }
    res.assign(cycle, node);
    assignedResources_.insert(
        std::pair<const MoveNode*, SchedulingResource*>(&node, &res));
}
 
/**
 * Free the resource type managed by this broker and unassign it from
 * given node.
 *
 * If this broker is not applicable to the given node, or the node is
 * not assigned a resource of the managed type, this method does
 * nothing.
 *
 * @param node Node.
 */
void
OutputPSocketBroker::unassign(MoveNode& node) {
    if (MapTools::containsKey(assignedResources_, &node)) {
        SchedulingResource* res = 
            MapTools::valueForKey<SchedulingResource*>(
                    assignedResources_,&node);
        res->unassign(node.cycle(), node);
        assignedResources_.erase(&node);
    }
}
 
/**
 * Return the earliest cycle, starting from given cycle, where a
 * resource of the type managed by this broker can be assigned to the
 * given node.
 *
 * @param cycle Cycle.
 * @param node Node.
 * @return The earliest cycle, starting from given cycle, where a
 * resource of the type managed by this broker can be assigned to the
 * given node.
 */
int
OutputPSocketBroker::earliestCycle(int, const MoveNode&,
                                   const TTAMachine::Bus*,
                                   const TTAMachine::FunctionUnit*,
                                   const TTAMachine::FunctionUnit*,
                                   int, const TTAMachine::ImmediateUnit*,
                                   int) const {
    abortWithError("Not implemented.");
    return -1;
}
 
/**
 * Return the latest cycle, starting from given cycle, where a
 * resource of the type managed by this broker can be assigned to the
 * given node.
 *
 * @param cycle Cycle.
 * @param node Node.
 * @return The latest cycle, starting from given cycle, where a
 * resource of the type managed by this broker can be assigned to the
 * given node.
 */
int
OutputPSocketBroker::latestCycle(int, const MoveNode&,
                                 const TTAMachine::Bus*,
                                 const TTAMachine::FunctionUnit*,
                                 const TTAMachine::FunctionUnit*, int,
                                 const TTAMachine::ImmediateUnit*,
                                 int) const {
    abortWithError("Not implemented.");
    return -1;
}
 
/**
 * Return true if the given node is already assigned a resource of the
 * type managed by this broker, and the assignment appears valid (that
 * is, the broker has marked that resource as in use in the given
 * cycle).
 *
 * @param cycle Cycle.
 * @param node Node.
 * @return True if the given node is already assigned a resource of the
 * type managed by this broker, and the assignment appears valid (that
 * is, the broker has marked that resource as in use in the given
 * cycle).
 */
bool
OutputPSocketBroker::isAlreadyAssigned(
    int cycle,
    const MoveNode& node, const TTAMachine::Bus* preassignedBus) const {
    cycle = instructionIndex(cycle);
    if (node.isSourceConstant() && 
        node.move().hasAnnotations(
            TTAProgram::ProgramAnnotation::ANN_REQUIRES_LIMM)) {
        return true;
    }    
    if (node.isSourceConstant() && rm_ &&
        !rm_->canTransportImmediate(node, preassignedBus)) {
        return true;
    }
    Terminal& src = const_cast<MoveNode&>(node).move().source();
    if (src.isFUPort() || src.isGPR() || src.isImmediateRegister()) {
        const Port& port = src.port();
        if (port.outputSocket() == NULL)
            return false;
        SchedulingResource* res = resourceOf(*port.outputSocket());
        if (res != NULL && res->isInUse(cycle) &&
            MapTools::containsKey(assignedResources_, &node)) {
            return true;
        }
    }
    return false;
}
 
/**
 * Return true if the given node needs a resource of the type managed
 * by this broker, false otherwise.
 *
 * @param node Node.
 * @return True if the given node needs a resource of the type managed
 * by this broker, false otherwise.
 */
bool
OutputPSocketBroker::isApplicable(
    const MoveNode& node, const TTAMachine::Bus* preassignedBus) const {
    if (!node.isMove()) {
        return false;
    }
    Move& move = const_cast<MoveNode&>(node).move();
    // If node is annotated, it will be converted to LIMM
    // and so we will need to assign output PScoket
    if (node.isSourceConstant() && node.move().hasAnnotations(
            TTAProgram::ProgramAnnotation::ANN_REQUIRES_LIMM)) {
        return true;
    }    
    if (node.isSourceConstant() &&
        rm_ && !rm_->canTransportImmediate(node, preassignedBus)) {
        return true;
    }
    return (move.source().isFUPort() ||
        move.source().isGPR() ||
        move.source().isImmediateRegister());
}
 
/**
 * Build all resource objects of the controlled type required to model
 * scheduling resources of the given target processor.
 *
 * This method cannot set up the resource links (dependent and related
 * resources) of the constructed resource objects.
 *
 * @param target Target machine.
 */
void
OutputPSocketBroker::buildResources(const TTAMachine::Machine& target) {
 
    Machine::SocketNavigator navi = target.socketNavigator();
 
    for (int i = 0; i < navi.count(); i++) {
        Socket* socket = navi.item(i);
        if (socket->direction() == Socket::OUTPUT) {
            OutputPSocketResource* opsResource =
                new OutputPSocketResource(socket->name(), initiationInterval_);
            ResourceBroker::addResource(*socket, opsResource);
        }
    }
}
 
/**
 * Complete resource initialisation by creating the references to
 * other resources due to a dependency or a relation. Use the given
 * resource mapper to lookup dependent and related resources using
 * machine parts as keys.
 *
 * @param mapper Resource mapper.
 */
void
OutputPSocketBroker::setupResourceLinks(const ResourceMapper& mapper) {
 
    setResourceMapper(mapper);
 
    for (ResourceMap::iterator resIter = resMap_.begin();
         resIter != resMap_.end(); resIter++) {
 
        const Socket* socket =
            static_cast<const Socket*>((*resIter).first);
 
        SchedulingResource* socketResource = (*resIter).second;
 
        for (int i = 0; i < socket->portCount(); i++) {
            Port* port = socket->port(i);
            Unit* unit = port->parentUnit();
            if (dynamic_cast<FunctionUnit*>(unit) != NULL) {
 
                SchedulingResource& relRes = 
                    *outputFUBroker_.resourceOf(*unit);
                socketResource->addToRelatedGroup(0, relRes);
            } else if (dynamic_cast<ImmediateUnit*>(unit) != NULL) {
                try {
                    SchedulingResource& relRes = mapper.resourceOf(*unit);
                    socketResource->addToRelatedGroup(1, relRes);
                } catch (const KeyNotFound& e) {
                    std::string msg = "OutputPSocketBroker: finding ";
                    msg += " resource for IU ";
                    msg += " failed with error: ";
                    msg += e.errorMessageStack();
                    throw KeyNotFound(
                        __FILE__, __LINE__, __func__, msg);
                }                                                            
            }
        }
 
        for (int i = 0; i < socket->segmentCount(); i++) {
            try {
                Segment* segment = socket->segment(i);
                Bus* bus = segment->parentBus();
                SchedulingResource& relRes = 
                    *busBroker_->resourceOf(*bus);
                socketResource->addToRelatedGroup(2, relRes);
            } catch (const KeyNotFound& e) {
                std::string msg = "OutputPSocketBroker: finding ";
                msg += " resource for Segment ";
                msg += " failed with error: ";
                msg += e.errorMessageStack();
                throw KeyNotFound(
                    __FILE__, __LINE__, __func__, msg);
            }                                                                        
        }
    }
}
 
/**
 * Gives reference to segmentbroker to this broker.
 *
 * Cannot be given in constructor because SegmentBroker is created later.
 */
void OutputPSocketBroker::setBusBroker(ResourceBroker& sb) {
    busBroker_ = &sb;
}