/*
+ * Copyright (c) 2012 ARM Limited
+ * All rights reserved.
+ *
+ * The license below extends only to copyright in the software and shall
+ * not be construed as granting a license to any other intellectual
+ * property including but not limited to intellectual property relating
+ * to a hardware implementation of the functionality of the software
+ * licensed hereunder. You may use the software subject to the license
+ * terms below provided that you ensure that this notice is replicated
+ * unmodified and in its entirety in all distributions of the software,
+ * modified or unmodified, in source code or in binary form.
+ *
* Copyright (c) 2006 The Regents of The University of Michigan
* All rights reserved.
*
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Ali Saidi
+ * Andreas Hansson
*/
#include "mem/tport.hh"
-void
-SimpleTimingPort::recvRetry()
+#include "mem/mem_object.hh"
+
+SimpleTimingPort::SimpleTimingPort(const std::string& _name,
+ MemObject* _owner) :
+ QueuedSlavePort(_name, _owner, queueImpl), queueImpl(*_owner, *this)
{
- bool result = true;
- while (result && transmitList.size()) {
- result = Port::sendTiming(transmitList.front());
- if (result)
- transmitList.pop_front();
- }
- if (transmitList.size() == 0 && drainEvent) {
- drainEvent->process();
- drainEvent = NULL;
- }
}
void
-SimpleTimingPort::SendEvent::process()
+SimpleTimingPort::recvFunctional(PacketPtr pkt)
{
- port->outTiming--;
- assert(port->outTiming >= 0);
- if (port->Port::sendTiming(packet))
- if (port->transmitList.size() == 0 && port->drainEvent) {
- port->drainEvent->process();
- port->drainEvent = NULL;
- }
- return;
-
- port->transmitList.push_back(packet);
+ if (!respQueue.trySatisfyFunctional(pkt)) {
+ // do an atomic access and throw away the returned latency
+ recvAtomic(pkt);
+ }
}
-void
-SimpleTimingPort::resendNacked(Packet *pkt) {
- pkt->reinitNacked();
- if (transmitList.size()) {
- transmitList.push_front(pkt);
+bool
+SimpleTimingPort::recvTimingReq(PacketPtr pkt)
+{
+ // the SimpleTimingPort should not be used anywhere where there is
+ // a need to deal with snoop responses and their flow control
+ // requirements
+ if (pkt->cacheResponding())
+ panic("SimpleTimingPort should never see packets with the "
+ "cacheResponding flag set\n");
+
+ bool needsResponse = pkt->needsResponse();
+ Tick latency = recvAtomic(pkt);
+ // turn packet around to go back to requester if response expected
+ if (needsResponse) {
+ // recvAtomic() should already have turned packet into
+ // atomic response
+ assert(pkt->isResponse());
+ schedTimingResp(pkt, curTick() + latency);
} else {
- if (!Port::sendTiming(pkt))
- transmitList.push_front(pkt);
+ // queue the packet for deletion
+ pendingDelete.reset(pkt);
}
-};
-
-unsigned int
-SimpleTimingPort::drain(Event *de)
-{
- if (outTiming == 0 && transmitList.size() == 0)
- return 0;
- drainEvent = de;
- return 1;
+ return true;
}