1 /**
2 * Copyright © 2019 IBM Corporation
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 #include "mru.hpp"
17
18 #include <phosphor-logging/lg2.hpp>
19
20 namespace openpower
21 {
22 namespace pels
23 {
24 namespace src
25 {
26
27 // The MRU substructure supports up to 15 MRUs.
28 static constexpr size_t maxMRUs = 15;
29
MRU(Stream & pel)30 MRU::MRU(Stream& pel)
31 {
32 pel >> _type >> _size >> _flags >> _reserved4B;
33
34 size_t numMRUs = _flags & 0xF;
35
36 for (size_t i = 0; i < numMRUs; i++)
37 {
38 MRUCallout mru;
39 pel >> mru.priority;
40 pel >> mru.id;
41 _mrus.push_back(std::move(mru));
42 }
43
44 size_t actualSize = sizeof(_type) + sizeof(_size) + sizeof(_flags) +
45 sizeof(_reserved4B) +
46 (sizeof(MRUCallout) * _mrus.size());
47 if (_size != actualSize)
48 {
49 lg2::warning(
50 "MRU callout section in PEL with {NUM_MRUS} MRUs has listed size "
51 "{SUBSTRUCTURE_SIZE} that doesn't match the actual size "
52 "{ACTUAL_SIZE}",
53 "SUBSTRUCTURE_SIZE", _size, "NUM_MRUS", _mrus.size(), "ACTUAL_SIZE",
54 actualSize);
55 }
56 }
57
MRU(const std::vector<MRUCallout> & mrus)58 MRU::MRU(const std::vector<MRUCallout>& mrus)
59 {
60 if (mrus.empty())
61 {
62 lg2::error("Trying to create a MRU section with no MRUs");
63 throw std::runtime_error{"Trying to create a MRU section with no MRUs"};
64 }
65
66 _mrus = mrus;
67 if (_mrus.size() > maxMRUs)
68 {
69 _mrus.resize(maxMRUs);
70 }
71
72 _type = substructureType;
73 _size = sizeof(_type) + sizeof(_size) + sizeof(_flags) +
74 sizeof(_reserved4B) + (sizeof(MRUCallout) * _mrus.size());
75 _flags = _mrus.size();
76 _reserved4B = 0;
77 }
78
flatten(Stream & pel) const79 void MRU::flatten(Stream& pel) const
80 {
81 pel << _type << _size << _flags << _reserved4B;
82
83 for (auto& mru : _mrus)
84 {
85 pel << mru.priority;
86 pel << mru.id;
87 }
88 }
89 } // namespace src
90 } // namespace pels
91 } // namespace openpower
92