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1 | /* |
2 | * Copyright (C) 2013 Freescale Semiconductor, Inc. | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
5 | * of this software and associated documentation files (the "Software"), to deal | |
6 | * in the Software without restriction, including without limitation the rights | |
7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
8 | * copies of the Software, and to permit persons to whom the Software is | |
9 | * furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice shall be included | |
12 | * in all copies or substantial portions of the Software. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
20 | * IN THE SOFTWARE. | |
21 | */ | |
22 | ||
23 | #include "NxPacketSet.h" | |
24 | ||
25 | #include <assert.h> | |
26 | #include <iostream> | |
27 | ||
28 | using std::cout; | |
29 | using std::endl; | |
30 | ||
31 | NxPacketSet::NxPacketSet() : | |
32 | verbose_(false) | |
33 | { | |
34 | reset(); | |
35 | } | |
36 | ||
37 | void NxPacketSet::reset() | |
38 | { | |
39 | // pointer to the first packet | |
40 | current_packet_index_ = 0; | |
41 | current_packet_ = &packet_[current_packet_index_]; | |
42 | ||
43 | for (uint32_t i = 0; i < MAX_NUM_PACKETS; ++i) { | |
44 | packet_[i].reset(); | |
45 | } | |
46 | } | |
47 | ||
48 | // add len bits of mdo to the current packet | |
49 | bool NxPacketSet::addToCurrent(uint32_t mdo) | |
50 | { | |
51 | bool ret = current_packet_->add(mdo); | |
52 | if (verbose_) { | |
53 | if (ret) { | |
54 | for (uint32_t i = 0; i <= current_packet_index_; ++i) { | |
55 | cout << "Packet[" << i << "]: " | |
56 | << packet_[i].packet_ << endl; | |
57 | } | |
58 | } else { | |
59 | cout << "Error adding MDO to Packet[" | |
60 | << current_packet_index_ << "]" << endl; | |
61 | } | |
62 | } | |
63 | return ret; | |
64 | } | |
65 | ||
66 | // advance to the next packet | |
67 | bool NxPacketSet::nextPacket() | |
68 | { | |
69 | assert(current_packet_index_ < (MAX_NUM_PACKETS - 1)); | |
70 | ||
71 | bool ret = current_packet_index_ < (MAX_NUM_PACKETS - 1); | |
72 | if (ret) { | |
73 | current_packet_index_++; | |
74 | current_packet_ = &packet_[current_packet_index_]; | |
75 | } | |
76 | return ret; | |
77 | } | |
78 | ||
79 | // get the value of len size from start (LSB) pos from packet at index | |
80 | uint32_t NxPacketSet::getField32(uint32_t index, uint32_t start_pos, | |
81 | uint32_t len) const | |
82 | { | |
83 | assert(index < MAX_NUM_PACKETS); | |
84 | return packet_[index].getField32(start_pos, len); | |
85 | ||
86 | } | |
87 | ||
88 | // get the value of len size from start (LSB) pos from packet at index | |
89 | uint64_t NxPacketSet::getField64(uint32_t index, uint32_t start_pos, | |
90 | uint32_t len) const | |
91 | { | |
92 | assert(index < MAX_NUM_PACKETS); | |
93 | return packet_[index].getField64(start_pos, len); | |
94 | } | |
95 | ||
96 | // get the number of MDO from packet at index | |
97 | uint32_t NxPacketSet::getNumMDO(uint32_t index) const | |
98 | { | |
99 | assert(index < MAX_NUM_PACKETS); | |
100 | return packet_[index].getNumMDO(); | |
101 | } | |
102 | ||
103 | bool NxPacketSet::packetAtIndexExists(uint32_t index) const | |
104 | { | |
105 | assert(index < MAX_NUM_PACKETS); | |
106 | return index <= current_packet_index_; | |
107 | } | |
108 | ||
109 | // return the TCODE | |
110 | uint32_t NxPacketSet::tcode() const | |
111 | { | |
112 | // index=0, start_pos=0, length=6 | |
113 | uint32_t ret = getField32(0, 0, 6); | |
114 | return ret; | |
115 | } | |
116 | ||
117 | // return the TCODE | |
118 | uint32_t NxPacketSet::src() const | |
119 | { | |
120 | // index=0, start_pos=6, length=6 | |
121 | uint32_t ret = getField32(0, 6, 6); | |
122 | return ret; | |
123 | } | |
124 | ||
125 | // NxPacket class | |
126 | ||
127 | NxPacket::NxPacket() | |
128 | { | |
129 | reset(); | |
130 | } | |
131 | ||
132 | // return the packet to the initial state | |
133 | void NxPacket::reset() | |
134 | { | |
135 | packet_.reset(); | |
136 | current_pos_ = 0; | |
137 | num_mdo_ = 0; | |
138 | } | |
139 | ||
140 | // add len bits of mdo to the packet | |
141 | bool NxPacket::add(uint32_t mdo) | |
142 | { | |
143 | assert((mdo & 0xc0000000) == 0); | |
144 | assert(num_mdo_ <= MAX_NUM_MDO_PER_PACKET); | |
145 | ||
146 | bool ret = true; | |
147 | PktBits mdo_bits(mdo); | |
148 | mdo_bits <<= current_pos_; | |
149 | packet_ |= mdo_bits; | |
150 | current_pos_ += MAX_NUM_MDO_BITS; | |
151 | num_mdo_++; | |
152 | ||
153 | return ret; | |
154 | } | |
155 | ||
156 | // get the value of len size from start (LSB) pos from packet | |
157 | uint32_t NxPacket::getField32(uint32_t start_pos, uint32_t len) const | |
158 | { | |
159 | assert(start_pos + len < MAX_NUM_PACKET_BITS); | |
160 | assert(len <= 32); | |
161 | ||
162 | uint32_t val = 0; | |
163 | uint32_t pos = start_pos + len - 1; | |
164 | for (uint32_t i = 0; i < len; ++i) { | |
165 | val <<= 1; | |
166 | val |= packet_[pos]; | |
167 | pos--; | |
168 | } | |
169 | return val; | |
170 | } | |
171 | ||
172 | // get the value of len size from start (LSB) pos from packet | |
173 | uint64_t NxPacket::getField64(uint32_t start_pos, uint32_t len) const | |
174 | { | |
175 | assert(start_pos + len < MAX_NUM_PACKET_BITS); | |
176 | assert(len <= 64); | |
177 | ||
178 | uint64_t val = 0; | |
179 | uint32_t pos = start_pos + len - 1; | |
180 | for (uint32_t i = 0; i < len; ++i) { | |
181 | val <<= 1; | |
182 | val |= packet_[pos]; | |
183 | pos--; | |
184 | } | |
185 | return val; | |
186 | } |