Switch.hh revision 9858 
1/*
2 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
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;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/*
30 * The actual modelled switch. It use the perfect switch and a
31 * Throttle object to control and bandwidth and timing *only for the
32 * output port*. So here we have un-realistic modelling, since the
33 * order of PerfectSwitch and Throttle objects get woke up affect the
34 * message timing. A more accurate model would be having two set of
35 * system states, one for this cycle, one for next cycle. And on the
36 * cycle boundary swap the two set of states.
37 */
38
39#ifndef __MEM_RUBY_NETWORK_SIMPLE_SWITCH_HH__
40#define __MEM_RUBY_NETWORK_SIMPLE_SWITCH_HH__
41
42#include <iostream>
43#include <vector>
44
45#include "mem/packet.hh"
46#include "mem/ruby/common/TypeDefines.hh"
47#include "mem/ruby/network/BasicRouter.hh"
48#include "params/Switch.hh"
49
50class MessageBuffer;
51class PerfectSwitch;
52class NetDest;
53class SimpleNetwork;
54class Throttle;
55
56class Switch : public BasicRouter
57{
58  public:
59    typedef SwitchParams Params;
60    Switch(const Params *p);
61    ~Switch();
62
63    void init();
64    void addInPort(const std::vector<MessageBuffer*>& in);
65    void addOutPort(const std::vector<MessageBuffer*>& out,
66        const NetDest& routing_table_entry, Cycles link_latency,
67        int bw_multiplier);
68    const Throttle* getThrottle(LinkID link_number) const;
69    const std::vector<Throttle*>* getThrottles() const;
70    void clearRoutingTables();
71    void clearBuffers();
72    void reconfigureOutPort(const NetDest& routing_table_entry);
73
74    void printStats(std::ostream& out) const;
75    void clearStats();
76    void print(std::ostream& out) const;
77    void init_net_ptr(SimpleNetwork* net_ptr) { m_network_ptr = net_ptr; }
78
79    bool functionalRead(Packet *);
80    uint32_t functionalWrite(Packet *);
81
82  private:
83    // Private copy constructor and assignment operator
84    Switch(const Switch& obj);
85    Switch& operator=(const Switch& obj);
86
87    PerfectSwitch* m_perfect_switch;
88    SimpleNetwork* m_network_ptr;
89    std::vector<Throttle*> m_throttles;
90    std::vector<MessageBuffer*> m_buffers_to_free;
91};
92
93inline std::ostream&
94operator<<(std::ostream& out, const Switch& obj)
95{
96    obj.print(out);
97    out << std::flush;
98    return out;
99}
100
101#endif // __MEM_RUBY_NETWORK_SIMPLE_SWITCH_HH__
102