tlm_port_wrapper.hh revision 14189 
1/*
2 * Copyright 2018 Google, Inc.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met: redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer;
8 * redistributions in binary form must reproduce the above copyright
9 * notice, this list of conditions and the following disclaimer in the
10 * documentation and/or other materials provided with the distribution;
11 * neither the name of the copyright holders nor the names of its
12 * contributors may be used to endorse or promote products derived from
13 * this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 * Authors: Gabe Black
28 */
29
30#ifndef __SYSTEMC_TLM_PORT_WRAPPER_HH__
31#define __SYSTEMC_TLM_PORT_WRAPPER_HH__
32
33#include "base/logging.hh"
34#include "sim/port.hh"
35#include "systemc/ext/tlm_core/2/sockets/sockets.hh"
36
37namespace sc_gem5
38{
39
40template <unsigned int BUSWIDTH=32,
41          typename TYPES=tlm::tlm_base_protocol_types, int N=1,
42          sc_core::sc_port_policy POL=sc_core::SC_ONE_OR_MORE_BOUND>
43class TlmInitiatorWrapper;
44
45template <unsigned int BUSWIDTH=32,
46          typename TYPES=tlm::tlm_base_protocol_types, int N=1,
47          sc_core::sc_port_policy POL=sc_core::SC_ONE_OR_MORE_BOUND>
48class TlmTargetWrapper;
49
50template <unsigned int BUSWIDTH, typename TYPES, int N,
51          sc_core::sc_port_policy POL>
52class TlmInitiatorWrapper : public ::Port
53{
54  public:
55    typedef tlm::tlm_base_initiator_socket<BUSWIDTH,
56            tlm::tlm_fw_transport_if<TYPES>,
57            tlm::tlm_bw_transport_if<TYPES>, N, POL>
58        InitiatorSocket;
59    typedef typename InitiatorSocket::base_target_socket_type TargetSocket;
60    typedef TlmTargetWrapper<BUSWIDTH, TYPES, N, POL> TargetWrapper;
61
62    InitiatorSocket &initiator() { return _initiator; }
63
64    TlmInitiatorWrapper(
65            InitiatorSocket &i, const std::string &_name, PortID _id) :
66        Port(_name, _id), _initiator(i)
67    {}
68
69    void
70    bind(::Port &peer) override
71    {
72        auto *target = dynamic_cast<TargetWrapper *>(&peer);
73        fatal_if(!target, "Attempt to bind TLM initiator socket %s to "
74                "incompatible port %s.", name(), peer.name());
75
76        initiator().bind(target->target());
77        Port::bind(peer);
78    }
79
80    void
81    unbind() override
82    {
83        panic("TLM sockets can't be unbound.");
84    }
85
86  private:
87    InitiatorSocket &_initiator;
88};
89
90template <unsigned int BUSWIDTH, typename TYPES, int N,
91          sc_core::sc_port_policy POL>
92class TlmTargetWrapper : public ::Port
93{
94  public:
95    typedef tlm::tlm_base_target_socket<BUSWIDTH,
96            tlm::tlm_fw_transport_if<TYPES>,
97            tlm::tlm_bw_transport_if<TYPES>, N, POL>
98        TargetSocket;
99
100    TargetSocket &target() { return _target; }
101
102    TlmTargetWrapper(TargetSocket &t, const std::string &_name, PortID _id) :
103        Port(_name, _id), _target(t)
104    {}
105
106    void
107    bind(::Port &peer) override
108    {
109        // Ignore attempts to bind a target socket. The initiator will
110        // handle it.
111        Port::bind(peer);
112    }
113
114    void
115    unbind() override
116    {
117        panic("TLM sockets can't be unbound.");
118    }
119
120  private:
121    TargetSocket &_target;
122};
123
124} // namespace sc_gem5
125
126#endif  //__SYSTEMC_TLM_PORT_WRAPPER_HH__
127