tport.cc (2914:2c524dc023d2) | tport.cc (3091:dba513d68c16) |
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1/* 2 * Copyright (c) 2006 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; --- 17 unchanged lines hidden (view full) --- 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Ali Saidi 29 */ 30 31#include "mem/tport.hh" 32 33void | 1/* 2 * Copyright (c) 2006 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; --- 17 unchanged lines hidden (view full) --- 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Ali Saidi 29 */ 30 31#include "mem/tport.hh" 32 33void |
34SimpleTimingPort::recvFunctional(Packet *pkt) 35{ 36 // just do an atomic access and throw away the returned latency 37 recvAtomic(pkt); 38} 39 40bool 41SimpleTimingPort::recvTiming(Packet *pkt) 42{ 43 // If the device is only a slave, it should only be sending 44 // responses, which should never get nacked. There used to be 45 // code to hanldle nacks here, but I'm pretty sure it didn't work 46 // correctly with the drain code, so that would need to be fixed 47 // if we ever added it back. 48 assert(pkt->result != Packet::Nacked); 49 Tick latency = recvAtomic(pkt); 50 // turn packet around to go back to requester 51 pkt->makeTimingResponse(); 52 sendTimingLater(pkt, latency); 53 return true; 54} 55 56void |
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34SimpleTimingPort::recvRetry() 35{ 36 bool result = true; 37 while (result && transmitList.size()) { | 57SimpleTimingPort::recvRetry() 58{ 59 bool result = true; 60 while (result && transmitList.size()) { |
38 result = Port::sendTiming(transmitList.front()); | 61 result = sendTiming(transmitList.front()); |
39 if (result) 40 transmitList.pop_front(); 41 } | 62 if (result) 63 transmitList.pop_front(); 64 } |
42 if (transmitList.size() == 0 && drainEvent) { 43 drainEvent->process(); 44 drainEvent = NULL; 45 } | 65 if (transmitList.size() == 0 && drainEvent) { 66 drainEvent->process(); 67 drainEvent = NULL; 68 } |
46} 47 48void 49SimpleTimingPort::SendEvent::process() 50{ 51 port->outTiming--; 52 assert(port->outTiming >= 0); | 69} 70 71void 72SimpleTimingPort::SendEvent::process() 73{ 74 port->outTiming--; 75 assert(port->outTiming >= 0); |
53 if (port->Port::sendTiming(packet)) 54 if (port->transmitList.size() == 0 && port->drainEvent) { 55 port->drainEvent->process(); 56 port->drainEvent = NULL; 57 } 58 return; 59 60 port->transmitList.push_back(packet); 61} 62 63void 64SimpleTimingPort::resendNacked(Packet *pkt) { 65 pkt->reinitNacked(); 66 if (transmitList.size()) { 67 transmitList.push_front(pkt); | 76 if (port->sendTiming(packet)) { 77 // send successfule 78 if (port->transmitList.size() == 0 && port->drainEvent) { 79 port->drainEvent->process(); 80 port->drainEvent = NULL; 81 } |
68 } else { | 82 } else { |
69 if (!Port::sendTiming(pkt)) 70 transmitList.push_front(pkt); | 83 // send unsuccessful (due to flow control). Will get retry 84 // callback later; save for then. 85 port->transmitList.push_back(packet); |
71 } | 86 } |
72}; | 87} |
73 74 75unsigned int 76SimpleTimingPort::drain(Event *de) 77{ 78 if (outTiming == 0 && transmitList.size() == 0) 79 return 0; 80 drainEvent = de; 81 return 1; 82} | 88 89 90unsigned int 91SimpleTimingPort::drain(Event *de) 92{ 93 if (outTiming == 0 && transmitList.size() == 0) 94 return 0; 95 drainEvent = de; 96 return 1; 97} |