1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
/*
* Copyright (c) 2006 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Ali Saidi
* Steve Reinhardt
*/
/**
* @file
* Definition of the Packet Class, a packet is a transaction occuring
* between a single level of the memory heirarchy (ie L1->L2).
*/
#include <iostream>
#include "base/misc.hh"
#include "base/trace.hh"
#include "mem/packet.hh"
static const std::string ReadReqString("ReadReq");
static const std::string WriteReqString("WriteReq");
static const std::string WriteReqNoAckString("WriteReqNoAck|Writeback");
static const std::string ReadRespString("ReadResp");
static const std::string WriteRespString("WriteResp");
static const std::string SoftPFReqString("SoftPFReq");
static const std::string SoftPFRespString("SoftPFResp");
static const std::string HardPFReqString("HardPFReq");
static const std::string HardPFRespString("HardPFResp");
static const std::string InvalidateReqString("InvalidateReq");
static const std::string WriteInvalidateReqString("WriteInvalidateReq");
static const std::string WriteInvalidateRespString("WriteInvalidateResp");
static const std::string UpgradeReqString("UpgradeReq");
static const std::string ReadExReqString("ReadExReq");
static const std::string ReadExRespString("ReadExResp");
static const std::string OtherCmdString("<other>");
const std::string &
Packet::cmdString() const
{
switch (cmd) {
case ReadReq: return ReadReqString;
case WriteReq: return WriteReqString;
case WriteReqNoAck: return WriteReqNoAckString;
case ReadResp: return ReadRespString;
case WriteResp: return WriteRespString;
case SoftPFReq: return SoftPFReqString;
case SoftPFResp: return SoftPFRespString;
case HardPFReq: return HardPFReqString;
case HardPFResp: return HardPFRespString;
case InvalidateReq: return InvalidateReqString;
case WriteInvalidateReq:return WriteInvalidateReqString;
case WriteInvalidateResp:return WriteInvalidateRespString;
case UpgradeReq: return UpgradeReqString;
case ReadExReq: return ReadExReqString;
case ReadExResp: return ReadExRespString;
default: return OtherCmdString;
}
}
const std::string &
Packet::cmdIdxToString(Packet::Command idx)
{
switch (idx) {
case ReadReq: return ReadReqString;
case WriteReq: return WriteReqString;
case WriteReqNoAck: return WriteReqNoAckString;
case ReadResp: return ReadRespString;
case WriteResp: return WriteRespString;
case SoftPFReq: return SoftPFReqString;
case SoftPFResp: return SoftPFRespString;
case HardPFReq: return HardPFReqString;
case HardPFResp: return HardPFRespString;
case InvalidateReq: return InvalidateReqString;
case WriteInvalidateReq:return WriteInvalidateReqString;
case WriteInvalidateResp:return WriteInvalidateRespString;
case UpgradeReq: return UpgradeReqString;
case ReadExReq: return ReadExReqString;
case ReadExResp: return ReadExRespString;
default: return OtherCmdString;
}
}
/** delete the data pointed to in the data pointer. Ok to call to matter how
* data was allocted. */
void
Packet::deleteData()
{
assert(staticData || dynamicData);
if (staticData)
return;
if (arrayData)
delete [] data;
else
delete data;
}
/** If there isn't data in the packet, allocate some. */
void
Packet::allocate()
{
if (data)
return;
assert(!staticData);
dynamicData = true;
arrayData = true;
data = new uint8_t[getSize()];
}
/** Do the packet modify the same addresses. */
bool
Packet::intersect(PacketPtr p)
{
Addr s1 = getAddr();
Addr e1 = getAddr() + getSize() - 1;
Addr s2 = p->getAddr();
Addr e2 = p->getAddr() + p->getSize() - 1;
return !(s1 > e2 || e1 < s2);
}
bool
fixPacket(PacketPtr func, PacketPtr timing)
{
Addr funcStart = func->getAddr();
Addr funcEnd = func->getAddr() + func->getSize() - 1;
Addr timingStart = timing->getAddr();
Addr timingEnd = timing->getAddr() + timing->getSize() - 1;
assert(!(funcStart > timingEnd || timingStart > funcEnd));
if (DTRACE(FunctionalAccess)) {
DebugOut() << func;
DebugOut() << timing;
}
// this packet can't solve our problem, continue on
if (!timing->hasData())
return true;
if (func->isRead()) {
if (funcStart >= timingStart && funcEnd <= timingEnd) {
func->allocate();
memcpy(func->getPtr<uint8_t>(), timing->getPtr<uint8_t>() +
funcStart - timingStart, func->getSize());
func->result = Packet::Success;
func->flags |= SATISFIED;
return false;
} else {
// In this case the timing packet only partially satisfies the
// requset, so we would need more information to make this work.
// Like bytes valid in the packet or something, so the request could
// continue and get this bit of possibly newer data along with the
// older data not written to yet.
panic("Timing packet only partially satisfies the functional"
"request. Now what?");
}
} else if (func->isWrite()) {
if (funcStart >= timingStart) {
memcpy(timing->getPtr<uint8_t>() + (funcStart - timingStart),
func->getPtr<uint8_t>(),
(std::min(funcEnd, timingEnd) - funcStart) + 1);
} else { // timingStart > funcStart
memcpy(timing->getPtr<uint8_t>(),
func->getPtr<uint8_t>() + (timingStart - funcStart),
(std::min(funcEnd, timingEnd) - timingStart) + 1);
}
// we always want to keep going with a write
return true;
} else
panic("Don't know how to handle command type %#x\n",
func->cmdToIndex());
}
std::ostream &
operator<<(std::ostream &o, const Packet &p)
{
o << "[0x";
o.setf(std::ios_base::hex, std::ios_base::showbase);
o << p.getAddr();
o.unsetf(std::ios_base::hex| std::ios_base::showbase);
o << ":";
o.setf(std::ios_base::hex, std::ios_base::showbase);
o << p.getAddr() + p.getSize() - 1 << "] ";
o.unsetf(std::ios_base::hex| std::ios_base::showbase);
if (p.result == Packet::Success)
o << "Successful ";
if (p.result == Packet::BadAddress)
o << "BadAddress ";
if (p.result == Packet::Nacked)
o << "Nacked ";
if (p.result == Packet::Unknown)
o << "Inflight ";
if (p.isRead())
o << "Read ";
if (p.isWrite())
o << "Read ";
if (p.isInvalidate())
o << "Read ";
if (p.isRequest())
o << "Request ";
if (p.isResponse())
o << "Response ";
if (p.hasData())
o << "w/Data ";
o << std::endl;
return o;
}
|