#include "mem/tport.hh"
void
-SimpleTimingPort::recvFunctional(PacketPtr pkt)
+SimpleTimingPort::checkFunctional(PacketPtr pkt)
{
- std::list<std::pair<Tick,PacketPtr> >::iterator i = transmitList.begin();
- std::list<std::pair<Tick,PacketPtr> >::iterator end = transmitList.end();
- bool notDone = true;
+ DeferredPacketIterator i = transmitList.begin();
+ DeferredPacketIterator end = transmitList.end();
- while (i != end && notDone) {
- PacketPtr target = i->second;
+ while (i != end) {
+ PacketPtr target = i->pkt;
// If the target contains data, and it overlaps the
// probed request, need to update data
- if (target->intersect(pkt))
- notDone = fixPacket(pkt, target);
+ if (target->intersect(pkt)) {
+ if (!fixPacket(pkt, target)) {
+ // fixPacket returns true for continue, false for done
+ return;
+ }
+ }
i++;
}
+}
- //Then just do an atomic access and throw away the returned latency
+void
+SimpleTimingPort::recvFunctional(PacketPtr pkt)
+{
+ checkFunctional(pkt);
+
+ // Just do an atomic access and throw away the returned latency
if (pkt->result != Packet::Success)
recvAtomic(pkt);
}
pkt->makeTimingResponse();
sendTiming(pkt, latency);
}
- else {
- if (pkt->cmd != MemCmd::UpgradeReq)
- {
- delete pkt->req;
- delete pkt;
- }
+ else if (pkt->cmd != MemCmd::UpgradeReq) {
+ delete pkt->req;
+ delete pkt;
}
return true;
}
SimpleTimingPort::recvRetry()
{
assert(!transmitList.empty());
- if (Port::sendTiming(transmitList.front().second)) {
+ if (Port::sendTiming(transmitList.front().pkt)) {
transmitList.pop_front();
DPRINTF(Bus, "No Longer waiting on retry\n");
if (!transmitList.empty()) {
- Tick time = transmitList.front().first;
- sendEvent.schedule(time <= curTick ? curTick+1 : time);
+ Tick time = transmitList.front().tick;
+ sendEvent->schedule(time <= curTick ? curTick+1 : time);
}
}
{
// Nothing is on the list: add it and schedule an event
if (transmitList.empty()) {
- assert(!sendEvent.scheduled());
- sendEvent.schedule(curTick+time);
- transmitList.push_back(std::pair<Tick,PacketPtr>(time+curTick,pkt));
+ assert(!sendEvent->scheduled());
+ sendEvent->schedule(curTick+time);
+ transmitList.push_back(DeferredPacket(time+curTick, pkt));
return;
}
// something is on the list and this belongs at the end
- if (time+curTick >= transmitList.back().first) {
- transmitList.push_back(std::pair<Tick,PacketPtr>(time+curTick,pkt));
+ if (time+curTick >= transmitList.back().tick) {
+ transmitList.push_back(DeferredPacket(time+curTick, pkt));
return;
}
// Something is on the list and this belongs somewhere else
- std::list<std::pair<Tick,PacketPtr> >::iterator i = transmitList.begin();
- std::list<std::pair<Tick,PacketPtr> >::iterator end = transmitList.end();
+ DeferredPacketIterator i = transmitList.begin();
+ DeferredPacketIterator end = transmitList.end();
bool done = false;
while (i != end && !done) {
- if (time+curTick < i->first) {
+ if (time+curTick < i->tick) {
if (i == transmitList.begin()) {
//Inserting at begining, reschedule
- sendEvent.reschedule(time+curTick);
+ sendEvent->reschedule(time+curTick);
}
- transmitList.insert(i,std::pair<Tick,PacketPtr>(time+curTick,pkt));
+ transmitList.insert(i, DeferredPacket(time+curTick, pkt));
done = true;
}
i++;
}
void
-SimpleTimingPort::SendEvent::process()
+SimpleTimingPort::processSendEvent()
{
- assert(port->transmitList.size());
- assert(port->transmitList.front().first <= curTick);
- if (port->Port::sendTiming(port->transmitList.front().second)) {
+ assert(transmitList.size());
+ assert(transmitList.front().tick <= curTick);
+ if (Port::sendTiming(transmitList.front().pkt)) {
//send successful, remove packet
- port->transmitList.pop_front();
- if (!port->transmitList.empty()) {
- Tick time = port->transmitList.front().first;
- schedule(time <= curTick ? curTick+1 : time);
+ transmitList.pop_front();
+ if (!transmitList.empty()) {
+ Tick time = transmitList.front().tick;
+ sendEvent->schedule(time <= curTick ? curTick+1 : time);
}
- if (port->transmitList.empty() && port->drainEvent) {
- port->drainEvent->process();
- port->drainEvent = NULL;
+ if (transmitList.empty() && drainEvent) {
+ drainEvent->process();
+ drainEvent = NULL;
}
return;
}
class SimpleTimingPort : public Port
{
protected:
+ /** A deferred packet, buffered to transmit later. */
+ class DeferredPacket {
+ public:
+ Tick tick; ///< The tick when the packet is ready to transmit
+ PacketPtr pkt; ///< Pointer to the packet to transmit
+ DeferredPacket(Tick t, PacketPtr p)
+ : tick(t), pkt(p)
+ {}
+ };
+
+ typedef std::list<DeferredPacket> DeferredPacketList;
+ typedef std::list<DeferredPacket>::iterator DeferredPacketIterator;
+
/** A list of outgoing timing response packets that haven't been
* serviced yet. */
- std::list<std::pair<Tick,PacketPtr> > transmitList;
+ DeferredPacketList transmitList;
+
+ /** This function attempts to send deferred packets. Scheduled to
+ * be called in the future via SendEvent. */
+ void processSendEvent();
/**
* This class is used to implemented sendTiming() with a delay. When
* When the event time expires it attempts to send the packet.
* If it cannot, the packet sent when recvRetry() is called.
**/
- class SendEvent : public Event
- {
- SimpleTimingPort *port;
-
- public:
- SendEvent(SimpleTimingPort *p)
- : Event(&mainEventQueue), port(p)
- { }
-
- virtual void process();
-
- virtual const char *description()
- { return "Future scheduled sendTiming event"; }
- };
+ typedef EventWrapper<SimpleTimingPort, &SimpleTimingPort::processSendEvent>
+ SendEvent;
- SendEvent sendEvent;
+ Event *sendEvent;
/** If we need to drain, keep the drain event around until we're done
* here.*/
Event *drainEvent;
+ /** Check the list of buffered packets against the supplied
+ * functional request. */
+ void checkFunctional(PacketPtr funcPkt);
+
/** Schedule a sendTiming() event to be called in the future.
* @param pkt packet to send
* @param time increment from now (in ticks) to send packet
public:
SimpleTimingPort(std::string pname, MemObject *_owner = NULL)
- : Port(pname, _owner), sendEvent(this), drainEvent(NULL)
+ : Port(pname, _owner),
+ sendEvent(new SendEvent(this)),
+ drainEvent(NULL)
{}
+ ~SimpleTimingPort() { delete sendEvent; }
+
/** Hook for draining timing accesses from the system. The
* associated SimObject's drain() functions should be implemented
* something like this when this class is used:
projects / gem5.git / commitdiff