MemCommand.cc revision 10428:0caf62b57dfd 
1/*
2 * Copyright (c) 2012-2014, TU Delft
3 * Copyright (c) 2012-2014, TU Eindhoven
4 * Copyright (c) 2012-2014, TU Kaiserslautern
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
9 * met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * 3. Neither the name of the copyright holder nor the names of its
19 * contributors may be used to endorse or promote products derived from
20 * this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
23 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
25 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
28 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
29 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
30 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
31 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
32 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 * Authors: Karthik Chandrasekar
35 *
36 */
37
38#include "MemCommand.h"
39
40#include <algorithm>  // for max
41
42#include "MemorySpecification.h"
43
44using namespace Data;
45using namespace std;
46
47MemCommand::MemCommand() :
48  type(MemCommand::PRE),
49  bank(0),
50  timestamp(0)
51{
52}
53
54MemCommand::MemCommand(MemCommand::cmds type,
55                       unsigned bank, double timestamp) :
56  type(type),
57  bank(bank),
58  timestamp(timestamp)
59{
60}
61
62void MemCommand::setType(MemCommand::cmds _type)
63{
64  type = _type;
65}
66
67MemCommand::cmds MemCommand::getType() const
68{
69  return type;
70}
71
72void MemCommand::setBank(unsigned _bank)
73{
74  bank = _bank;
75}
76
77unsigned MemCommand::getBank() const
78{
79  return bank;
80}
81
82// For auto-precharge with read or write - to calculate cycle of precharge
83int MemCommand::getPrechargeOffset(const MemorySpecification& memSpec,
84                                   MemCommand::cmds           type) const
85{
86  int precharge_offset = 0;
87
88  int BL(static_cast<int>(memSpec.memArchSpec.burstLength));
89  int RTP(static_cast<int>(memSpec.memTimingSpec.RTP));
90  int dataRate(static_cast<int>(memSpec.memArchSpec.dataRate));
91  int AL(static_cast<int>(memSpec.memTimingSpec.AL));
92  int WL(static_cast<int>(memSpec.memTimingSpec.WL));
93  int WR(static_cast<int>(memSpec.memTimingSpec.WR));
94  int B = BL/dataRate;
95
96  const MemoryType::MemoryType_t& memType = memSpec.memoryType;
97
98  // Read with auto-precharge
99  if (type == MemCommand::RDA) {
100    if (memType == MemoryType::DDR2) {
101      precharge_offset = B + AL - 2 + max(RTP, 2);
102    } else if (memType == MemoryType::DDR3) {
103      precharge_offset = AL + max(RTP, 4);
104    } else if (memType == MemoryType::DDR4) {
105      precharge_offset = AL + RTP;
106    } else if (memType == MemoryType::LPDDR) {
107      precharge_offset = B;
108    } else if (memType == MemoryType::LPDDR2) {
109      precharge_offset = B + max(0, RTP - 2);
110    } else if (memType == MemoryType::LPDDR3) {
111      precharge_offset = B + max(0, RTP - 4);
112    } else if (memType == MemoryType::WIDEIO_SDR) {
113      precharge_offset = B;
114    }
115  } else if (type == MemCommand::WRA) { // Write with auto-precharge
116    if (memType == MemoryType::DDR2) {
117      precharge_offset = B + WL + WR;
118    } else if (memType == MemoryType::DDR3) {
119      precharge_offset = B + WL + WR;
120    } else if (memType == MemoryType::DDR4) {
121      precharge_offset = B + WL + WR;
122    } else if (memType == MemoryType::LPDDR) {
123      precharge_offset = B + WR;  // + DQSS actually, but we don't have that parameter.
124    } else if (memType == MemoryType::LPDDR2) {
125      precharge_offset = B +  WL + WR + 1;
126    } else if (memType == MemoryType::LPDDR3) {
127      precharge_offset = B +  WL + WR + 1;
128    } else if (memType == MemoryType::WIDEIO_SDR) {
129      precharge_offset = B + WL + WR - 1;
130    }
131  }
132
133  return precharge_offset;
134} // MemCommand::getPrechargeOffset
135
136void MemCommand::setTime(double _timestamp)
137{
138  timestamp = _timestamp;
139}
140
141double MemCommand::getTime() const
142{
143  return timestamp;
144}
145
146int64_t MemCommand::getTimeInt64() const
147{
148  return static_cast<int64_t>(timestamp);
149}
150
151MemCommand::cmds MemCommand::typeWithoutAutoPrechargeFlag() const
152{
153  if (type == MemCommand::RDA) {
154    return MemCommand::RD;
155  } else if (type == MemCommand::WRA) {
156    return MemCommand::WR;
157  }
158  return type;
159}
160