1/*
2 * Copyright (c) 2018 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 * Author: Matteo Andreozzi
38 */
39
40#include "mem/qos/policy_fixed_prio.hh"
41
42#include <algorithm>
43#include <functional>
44
45#include "mem/request.hh"
46
47namespace QoS {
48
49FixedPriorityPolicy::FixedPriorityPolicy(const Params* p)
50  : Policy(p), defaultPriority(p->qos_fixed_prio_default_prio)
51{}
52
53FixedPriorityPolicy::~FixedPriorityPolicy()
54{}
55
56void
57FixedPriorityPolicy::init()
58{
59}
60
61void
62FixedPriorityPolicy::initMasterName(std::string master, uint8_t priority)
63{
64    priorityMap.insert(
65        this->pair<std::string, uint8_t>(master, priority));
66}
67
68void
69FixedPriorityPolicy::initMasterObj(const SimObject* master, uint8_t priority)
70{
71    priorityMap.insert(
72        this->pair<const SimObject*, uint8_t>(master, priority));
73}
74
75uint8_t
76FixedPriorityPolicy::schedule(const MasterID mId, const uint64_t data)
77{
78    // Reads a packet's MasterID contained in its encapsulated request
79    // if a match is found in the configured priority map, returns the
80    // matching priority, else returns zero
81
82    auto ret = priorityMap.find(mId);
83
84    if (ret != priorityMap.end()) {
85        return ret->second;
86    } else {
87        DPRINTF(QOS, "Master %s (MasterID %d) not present in priorityMap, "
88                     "assigning default priority %d\n",
89                      memCtrl->system()->getMasterName(mId),
90                      mId, defaultPriority);
91        return defaultPriority;
92    }
93}
94
95} // namespace QoS
96
97QoS::FixedPriorityPolicy *
98QoSFixedPriorityPolicyParams::create()
99{
100    return new QoS::FixedPriorityPolicy(this);
101}
102