external_master.cc revision 11800 
1/*
2 * Copyright (c) 2012-2014 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
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Andrew Bardsley
38 *          Curtis Dunham
39 */
40
41#include "mem/external_master.hh"
42
43#include <cctype>
44#include <iomanip>
45
46#include "base/trace.hh"
47#include "debug/ExternalPort.hh"
48
49std::map<std::string, ExternalMaster::Handler *>
50    ExternalMaster::portHandlers;
51
52ExternalMaster::ExternalMaster(ExternalMasterParams *params) :
53    MemObject(params),
54    externalPort(NULL),
55    portName(params->name + ".port"),
56    portType(params->port_type),
57    portData(params->port_data)
58{}
59
60BaseMasterPort &
61ExternalMaster::getMasterPort(const std::string &if_name,
62    PortID idx)
63{
64    if (if_name == "port") {
65        DPRINTF(ExternalPort, "Trying to bind external port: %s %s\n",
66            portType, portName);
67
68        if (!externalPort) {
69            auto handlerIter = portHandlers.find(portType);
70
71            if (handlerIter == portHandlers.end())
72                fatal("Can't find port handler type '%s'\n", portType);
73
74            externalPort = portHandlers[portType]->getExternalPort(portName,
75                *this, portData);
76
77            if (!externalPort) {
78                fatal("%s: Can't find external port type: %s"
79                    " port_data: '%s'\n", portName, portType, portData);
80            }
81        }
82        return *externalPort;
83    } else {
84        return MemObject::getMasterPort(if_name, idx);
85    }
86}
87
88void
89ExternalMaster::init()
90{
91    if (!externalPort) {
92        fatal("ExternalMaster %s: externalPort not set!\n", name());
93    } else if (!externalPort->isConnected()) {
94        fatal("ExternalMaster %s is unconnected!\n", name());
95    }
96}
97
98ExternalMaster *
99ExternalMasterParams::create()
100{
101    return new ExternalMaster(this);
102}
103
104void
105ExternalMaster::registerHandler(const std::string &handler_name,
106    Handler *handler)
107{
108    portHandlers[handler_name] = handler;
109}
110