packet_queue.hh (8975:7f36d4436074) packet_queue.hh (9342:6fec8f26e56d)
1/*
2 * Copyright (c) 2012 ARM Limited
3 * All rights reserved.
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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52 * for the flow control of the port, but relies on the module
53 * notifying the queue when a transfer ends.
54 */
55
56#include <list>
57
58#include "mem/port.hh"
59#include "sim/eventq.hh"
1/*
2 * Copyright (c) 2012 ARM Limited
3 * All rights reserved.
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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52 * for the flow control of the port, but relies on the module
53 * notifying the queue when a transfer ends.
54 */
55
56#include <list>
57
58#include "mem/port.hh"
59#include "sim/eventq.hh"
60#include "sim/drain.hh"
60
61/**
62 * A packet queue is a class that holds deferred packets and later
63 * sends them using the associated slave port or master port.
64 */
61
62/**
63 * A packet queue is a class that holds deferred packets and later
64 * sends them using the associated slave port or master port.
65 */
65class PacketQueue
66class PacketQueue : public Drainable
66{
67 private:
68 /** A deferred packet, buffered to transmit later. */
69 class DeferredPacket {
70 public:
71 Tick tick; ///< The tick when the packet is ready to transmit
72 PacketPtr pkt; ///< Pointer to the packet to transmit
73 bool sendAsSnoop; ///< Should it be sent as a snoop or not

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90 * be called in the future via SendEvent. */
91 void processSendEvent();
92
93 /**
94 * Event used to call processSendEvent.
95 **/
96 EventWrapper<PacketQueue, &PacketQueue::processSendEvent> sendEvent;
97
67{
68 private:
69 /** A deferred packet, buffered to transmit later. */
70 class DeferredPacket {
71 public:
72 Tick tick; ///< The tick when the packet is ready to transmit
73 PacketPtr pkt; ///< Pointer to the packet to transmit
74 bool sendAsSnoop; ///< Should it be sent as a snoop or not

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91 * be called in the future via SendEvent. */
92 void processSendEvent();
93
94 /**
95 * Event used to call processSendEvent.
96 **/
97 EventWrapper<PacketQueue, &PacketQueue::processSendEvent> sendEvent;
98
98 /** If we need to drain, keep the drain event around until we're done
99 /** If we need to drain, keep the drain manager around until we're done
99 * here.*/
100 * here.*/
100 Event *drainEvent;
101 DrainManager *drainManager;
101
102 protected:
103
104 /** Label to use for print request packets label stack. */
105 const std::string label;
106
107 /** Remember whether we're awaiting a retry from the bus. */
108 bool waitingOnRetry;

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202
203 /**
204 * Used by a port to notify the queue that a retry was received
205 * and that the queue can proceed and retry sending the packet
206 * that caused the wait.
207 */
208 void retry();
209
102
103 protected:
104
105 /** Label to use for print request packets label stack. */
106 const std::string label;
107
108 /** Remember whether we're awaiting a retry from the bus. */
109 bool waitingOnRetry;

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203
204 /**
205 * Used by a port to notify the queue that a retry was received
206 * and that the queue can proceed and retry sending the packet
207 * that caused the wait.
208 */
209 void retry();
210
210 /**
211 * Hook for draining the packet queue.
212 *
213 * @param de An event which is used to signal back to the caller
214 * @return A number indicating how many times process will be called
215 */
216 unsigned int drain(Event *de);
211 unsigned int drain(DrainManager *dm);
217};
218
219class MasterPacketQueue : public PacketQueue
220{
221
222 protected:
223
224 MasterPort& masterPort;

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213
214class MasterPacketQueue : public PacketQueue
215{
216
217 protected:
218
219 MasterPort& masterPort;

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