55a461a8b5182f6e4b5d6aeab37e5be197be477d
2 * Copyright (c) 2006 The Regents of The University of Michigan
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31 #include "mem/tport.hh"
34 SimpleTimingPort::recvFunctional(PacketPtr pkt
)
36 std::list
<PacketPtr
>::iterator i
= transmitList
.begin();
37 std::list
<PacketPtr
>::iterator end
= transmitList
.end();
40 PacketPtr target
= *i
;
41 // If the target contains data, and it overlaps the
42 // probed request, need to update data
43 if (target
->intersect(pkt
))
44 fixPacket(pkt
, target
);
48 //Then just do an atomic access and throw away the returned latency
49 if (pkt
->result
!= Packet::Success
)
54 SimpleTimingPort::recvTiming(PacketPtr pkt
)
56 // If the device is only a slave, it should only be sending
57 // responses, which should never get nacked. There used to be
58 // code to hanldle nacks here, but I'm pretty sure it didn't work
59 // correctly with the drain code, so that would need to be fixed
60 // if we ever added it back.
61 assert(pkt
->result
!= Packet::Nacked
);
62 Tick latency
= recvAtomic(pkt
);
63 // turn packet around to go back to requester if response expected
64 if (pkt
->needsResponse()) {
65 pkt
->makeTimingResponse();
66 sendTimingLater(pkt
, latency
);
69 if (pkt
->cmd
!= Packet::UpgradeReq
)
79 SimpleTimingPort::recvRetry()
81 assert(outTiming
> 0);
82 assert(!transmitList
.empty());
83 if (sendTiming(transmitList
.front())) {
84 transmitList
.pop_front();
86 DPRINTF(Bus
, "No Longer waiting on retry\n");
87 if (!transmitList
.empty())
88 sendTimingLater(transmitList
.front(), 1);
91 if (transmitList
.empty() && drainEvent
) {
92 drainEvent
->process();
98 SimpleTimingPort::SendEvent::process()
100 assert(port
->outTiming
> 0);
101 if (!port
->transmitList
.empty() && port
->transmitList
.front() != packet
) {
102 //We are not the head of the list
103 port
->transmitList
.push_back(packet
);
104 } else if (port
->sendTiming(packet
)) {
106 if (port
->transmitList
.size()) {
107 port
->transmitList
.pop_front();
109 if (!port
->transmitList
.empty())
110 port
->sendTimingLater(port
->transmitList
.front(), 1);
112 if (port
->transmitList
.empty() && port
->drainEvent
) {
113 port
->drainEvent
->process();
114 port
->drainEvent
= NULL
;
117 // send unsuccessful (due to flow control). Will get retry
118 // callback later; save for then if not already
119 DPRINTF(Bus
, "Waiting on retry\n");
120 if (!(port
->transmitList
.front() == packet
))
121 port
->transmitList
.push_back(packet
);
127 SimpleTimingPort::drain(Event
*de
)
129 if (outTiming
== 0 && transmitList
.size() == 0)