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31 #include "mem/tport.hh"
34 SimpleTimingPort::recvFunctional(PacketPtr pkt
)
36 std::list
<std::pair
<Tick
,PacketPtr
> >::iterator i
= transmitList
.begin();
37 std::list
<std::pair
<Tick
,PacketPtr
> >::iterator end
= transmitList
.end();
40 while (i
!= end
&& !done
) {
41 PacketPtr target
= i
->second
;
42 // If the target contains data, and it overlaps the
43 // probed request, need to update data
44 if (target
->intersect(pkt
))
45 done
= fixPacket(pkt
, target
);
49 //Then just do an atomic access and throw away the returned latency
50 if (pkt
->result
!= Packet::Success
)
55 SimpleTimingPort::recvTiming(PacketPtr pkt
)
57 // If the device is only a slave, it should only be sending
58 // responses, which should never get nacked. There used to be
59 // code to hanldle nacks here, but I'm pretty sure it didn't work
60 // correctly with the drain code, so that would need to be fixed
61 // if we ever added it back.
62 assert(pkt
->result
!= Packet::Nacked
);
63 Tick latency
= recvAtomic(pkt
);
64 // turn packet around to go back to requester if response expected
65 if (pkt
->needsResponse()) {
66 pkt
->makeTimingResponse();
67 sendTiming(pkt
, latency
);
70 if (pkt
->cmd
!= Packet::UpgradeReq
)
80 SimpleTimingPort::recvRetry()
82 assert(!transmitList
.empty());
83 if (Port::sendTiming(transmitList
.front().second
)) {
84 transmitList
.pop_front();
85 DPRINTF(Bus
, "No Longer waiting on retry\n");
86 if (!transmitList
.empty()) {
87 Tick time
= transmitList
.front().first
;
88 sendEvent
.schedule(time
<= curTick
? curTick
+1 : time
);
92 if (transmitList
.empty() && drainEvent
) {
93 drainEvent
->process();
99 SimpleTimingPort::sendTiming(PacketPtr pkt
, Tick time
)
101 if (transmitList
.empty()) {
102 assert(!sendEvent
.scheduled());
103 sendEvent
.schedule(curTick
+time
);
105 transmitList
.push_back(std::pair
<Tick
,PacketPtr
>(time
+curTick
,pkt
));
109 SimpleTimingPort::SendEvent::process()
111 assert(port
->transmitList
.size());
112 assert(port
->transmitList
.front().first
<= curTick
);
113 if (port
->Port::sendTiming(port
->transmitList
.front().second
)) {
114 //send successful, remove packet
115 port
->transmitList
.pop_front();
116 if (!port
->transmitList
.empty()) {
117 Tick time
= port
->transmitList
.front().first
;
118 schedule(time
<= curTick
? curTick
+1 : time
);
120 if (port
->transmitList
.empty() && port
->drainEvent
) {
121 port
->drainEvent
->process();
122 port
->drainEvent
= NULL
;
126 // send unsuccessful (due to flow control). Will get retry
127 // callback later; save for then if not already
128 DPRINTF(Bus
, "Waiting on retry\n");
133 SimpleTimingPort::drain(Event
*de
)
135 if (transmitList
.size() == 0)