Sequencer.hh revision 6886:3137c3d41107 
1
2/*
3 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30/*
31 * $Id: Sequencer.hh 1.70 2006/09/27 14:56:41-05:00 bobba@s1-01.cs.wisc.edu $
32 *
33 * Description:
34 *
35 */
36
37#ifndef SEQUENCER_H
38#define SEQUENCER_H
39
40#include "mem/ruby/common/Global.hh"
41#include "mem/ruby/common/Consumer.hh"
42#include "mem/protocol/CacheRequestType.hh"
43#include "mem/protocol/AccessModeType.hh"
44#include "mem/protocol/GenericMachineType.hh"
45#include "mem/protocol/PrefetchBit.hh"
46#include "mem/ruby/system/RubyPort.hh"
47#include "mem/gems_common/Map.hh"
48#include "mem/ruby/common/Address.hh"
49
50class DataBlock;
51class CacheMsg;
52class MachineID;
53class CacheMemory;
54
55class RubySequencerParams;
56
57struct SequencerRequest {
58  RubyRequest ruby_request;
59  int64_t id;
60  Time issue_time;
61
62  SequencerRequest(const RubyRequest & _ruby_request, int64_t _id, Time _issue_time)
63    : ruby_request(_ruby_request), id(_id), issue_time(_issue_time)
64  {}
65};
66
67std::ostream& operator<<(std::ostream& out, const SequencerRequest& obj);
68
69class Sequencer : public RubyPort, public Consumer {
70public:
71    typedef RubySequencerParams Params;
72  // Constructors
73  Sequencer(const Params *);
74
75  // Destructor
76  ~Sequencer();
77
78  // Public Methods
79  void wakeup(); // Used only for deadlock detection
80
81  void printConfig(ostream& out) const;
82
83  void printProgress(ostream& out) const;
84
85  void writeCallback(const Address& address, DataBlock& data);
86  void readCallback(const Address& address, DataBlock& data);
87
88  // called by Tester or Simics
89  int64_t makeRequest(const RubyRequest & request);
90  int isReady(const RubyRequest& request);
91  bool empty() const;
92
93  void print(ostream& out) const;
94  void printStats(ostream & out) const;
95  void checkCoherence(const Address& address);
96
97  //  bool getRubyMemoryValue(const Address& addr, char* value, unsigned int size_in_bytes);
98  //  bool setRubyMemoryValue(const Address& addr, char *value, unsigned int size_in_bytes);
99
100  void removeRequest(SequencerRequest* request);
101private:
102  // Private Methods
103  bool tryCacheAccess(const Address& addr, CacheRequestType type, const Address& pc, AccessModeType access_mode, int size, DataBlock*& data_ptr);
104  void issueRequest(const RubyRequest& request);
105
106  void hitCallback(SequencerRequest* request, DataBlock& data);
107  bool insertRequest(SequencerRequest* request);
108
109
110  // Private copy constructor and assignment operator
111  Sequencer(const Sequencer& obj);
112  Sequencer& operator=(const Sequencer& obj);
113
114private:
115  int m_max_outstanding_requests;
116  int m_deadlock_threshold;
117
118  CacheMemory* m_dataCache_ptr;
119  CacheMemory* m_instCache_ptr;
120
121  Map<Address, SequencerRequest*> m_writeRequestTable;
122  Map<Address, SequencerRequest*> m_readRequestTable;
123  // Global outstanding request count, across all request tables
124  int m_outstanding_count;
125  bool m_deadlock_check_scheduled;
126
127  int m_store_waiting_on_load_cycles;
128  int m_store_waiting_on_store_cycles;
129  int m_load_waiting_on_store_cycles;
130  int m_load_waiting_on_load_cycles;
131
132  class SequencerWakeupEvent : public Event
133  {
134      Sequencer *m_sequencer_ptr;
135
136    public:
137      SequencerWakeupEvent(Sequencer *_seq) : m_sequencer_ptr(_seq) {}
138      void process() { m_sequencer_ptr->wakeup(); }
139      const char *description() const { return "Sequencer deadlock check"; }
140  };
141
142  SequencerWakeupEvent deadlockCheckEvent;
143};
144
145// Output operator declaration
146ostream& operator<<(ostream& out, const Sequencer& obj);
147
148// ******************* Definitions *******************
149
150// Output operator definition
151extern inline
152ostream& operator<<(ostream& out, const Sequencer& obj)
153{
154  obj.print(out);
155  out << flush;
156  return out;
157}
158
159#endif //SEQUENCER_H
160
161