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