1/*
| 1/*
|
2 * Copyright (c) 2013 ARM Limited
| 2 * Copyright (c) 2013-2014 ARM Limited
|
3 * Copyright (c) 2013 Cornell University
4 * All rights reserved
5 *
6 * The license below extends only to copyright in the software and shall
7 * not be construed as granting a license to any other intellectual
8 * property including but not limited to intellectual property relating
9 * to a hardware implementation of the functionality of the software
10 * licensed hereunder. You may use the software subject to the license
11 * terms below provided that you ensure that this notice is replicated
12 * unmodified and in its entirety in all distributions of the software,
13 * modified or unmodified, in source code or in binary form.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions are
17 * met: redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer;
19 * redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution;
22 * neither the name of the copyright holders nor the names of its
23 * contributors may be used to endorse or promote products derived from
24 * this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
28 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
29 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
30 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
31 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
32 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
36 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 *
38 * Authors: Vasileios Spiliopoulos
39 * Akash Bagdia
40 * Andreas Hansson
41 * Christopher Torng
| 3 * Copyright (c) 2013 Cornell University
4 * All rights reserved
5 *
6 * The license below extends only to copyright in the software and shall
7 * not be construed as granting a license to any other intellectual
8 * property including but not limited to intellectual property relating
9 * to a hardware implementation of the functionality of the software
10 * licensed hereunder. You may use the software subject to the license
11 * terms below provided that you ensure that this notice is replicated
12 * unmodified and in its entirety in all distributions of the software,
13 * modified or unmodified, in source code or in binary form.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions are
17 * met: redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer;
19 * redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution;
22 * neither the name of the copyright holders nor the names of its
23 * contributors may be used to endorse or promote products derived from
24 * this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
28 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
29 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
30 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
31 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
32 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
36 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 *
38 * Authors: Vasileios Spiliopoulos
39 * Akash Bagdia
40 * Andreas Hansson
41 * Christopher Torng
|
| 42 * Stephan Diestelhorst
|
42 */
43
| 43 */
44
|
| 45#include <algorithm>
46#include <functional>
47
|
44#include "debug/ClockDomain.hh"
45#include "params/ClockDomain.hh"
46#include "params/DerivedClockDomain.hh"
47#include "params/SrcClockDomain.hh"
48#include "sim/clock_domain.hh"
49#include "sim/voltage_domain.hh"
50#include "sim/clocked_object.hh"
51
52void
53ClockDomain::regStats()
54{
55 using namespace Stats;
56
57 // Expose the current clock period as a stat for observability in
58 // the dumps
59 currentClock
60 .scalar(_clockPeriod)
61 .name(params()->name + ".clock")
62 .desc("Clock period in ticks")
63 ;
64}
65
66double
67ClockDomain::voltage() const
68{
69 return _voltageDomain->voltage();
70}
71
72SrcClockDomain::SrcClockDomain(const Params *p) :
| 48#include "debug/ClockDomain.hh"
49#include "params/ClockDomain.hh"
50#include "params/DerivedClockDomain.hh"
51#include "params/SrcClockDomain.hh"
52#include "sim/clock_domain.hh"
53#include "sim/voltage_domain.hh"
54#include "sim/clocked_object.hh"
55
56void
57ClockDomain::regStats()
58{
59 using namespace Stats;
60
61 // Expose the current clock period as a stat for observability in
62 // the dumps
63 currentClock
64 .scalar(_clockPeriod)
65 .name(params()->name + ".clock")
66 .desc("Clock period in ticks")
67 ;
68}
69
70double
71ClockDomain::voltage() const
72{
73 return _voltageDomain->voltage();
74}
75
76SrcClockDomain::SrcClockDomain(const Params *p) :
|
73 ClockDomain(p, p->voltage_domain)
| 77 ClockDomain(p, p->voltage_domain),
78 freqOpPoints(p->clock),
79 _domainID(p->domain_id),
80 _perfLevel(p->init_perf_level)
|
74{
| 81{
|
75 clockPeriod(p->clock);
| 82 VoltageDomain *vdom = p->voltage_domain;
83
84 fatal_if(freqOpPoints.empty(), "DVFS: Empty set of frequencies for "\
85 "domain %d %s\n", _domainID, name());
86
87 fatal_if(!vdom, "DVFS: Empty voltage domain specified for "\
88 "domain %d %s\n", _domainID, name());
89
90 fatal_if((vdom->numVoltages() > 1) &&
91 (vdom->numVoltages() != freqOpPoints.size()),
92 "DVFS: Number of frequency and voltage scaling points do "\
93 "not match: %d:%d ID: %d %s.\n", vdom->numVoltages(),
94 freqOpPoints.size(), _domainID, name());
95
96 // Frequency (& voltage) points should be declared in descending order,
97 // NOTE: Frequency is inverted to ticks, so checking for ascending ticks
98 fatal_if(!std::is_sorted(freqOpPoints.begin(), freqOpPoints.end()),
99 "DVFS: Frequency operation points not in descending order for "\
100 "domain with ID %d\n", _domainID);
101
102 fatal_if(_perfLevel >= freqOpPoints.size(), "DVFS: Initial DVFS point %d "\
103 "is outside of list for Domain ID: %d\n", _perfLevel, _domainID);
104
105 clockPeriod(freqOpPoints[_perfLevel]);
106
107 vdom->registerSrcClockDom(this);
|
76}
77
78void
79SrcClockDomain::clockPeriod(Tick clock_period)
80{
81 if (clock_period == 0) {
82 fatal("%s has a clock period of zero\n", name());
83 }
84
85 // Align all members to the current tick
86 for (auto m = members.begin(); m != members.end(); ++m) {
87 (*m)->updateClockPeriod();
88 }
89
90 _clockPeriod = clock_period;
91
92 DPRINTF(ClockDomain,
93 "Setting clock period to %d ticks for source clock %s\n",
94 _clockPeriod, name());
95
96 // inform any derived clocks they need to updated their period
97 for (auto c = children.begin(); c != children.end(); ++c) {
98 (*c)->updateClockPeriod();
99 }
100}
101
| 108}
109
110void
111SrcClockDomain::clockPeriod(Tick clock_period)
112{
113 if (clock_period == 0) {
114 fatal("%s has a clock period of zero\n", name());
115 }
116
117 // Align all members to the current tick
118 for (auto m = members.begin(); m != members.end(); ++m) {
119 (*m)->updateClockPeriod();
120 }
121
122 _clockPeriod = clock_period;
123
124 DPRINTF(ClockDomain,
125 "Setting clock period to %d ticks for source clock %s\n",
126 _clockPeriod, name());
127
128 // inform any derived clocks they need to updated their period
129 for (auto c = children.begin(); c != children.end(); ++c) {
130 (*c)->updateClockPeriod();
131 }
132}
133
|
| 134void
135SrcClockDomain::perfLevel(PerfLevel perf_level)
136{
137 assert(validPerfLevel(perf_level));
138
139 DPRINTF(ClockDomain, "DVFS: Switching performance level of domain %s "\
140 "(id: %d) from %d to %d\n", name(), domainID(), _perfLevel,
141 perf_level);
142
143 _perfLevel = perf_level;
144
145 // Signal the voltage domain that we have changed our perf level so that the
146 // voltage domain can recompute its performance level
147 voltageDomain()->sanitiseVoltages();
148
149 // Integrated switching of the actual clock value, too
150 clockPeriod(clkPeriodAtPerfLevel());
151}
152
153void
154SrcClockDomain::serialize(std::ostream &os)
155{
156 SERIALIZE_SCALAR(_perfLevel);
157 ClockDomain::serialize(os);
158}
159
160void
161SrcClockDomain::unserialize(Checkpoint *cp, const std::string §ion)
162{
163 ClockDomain::unserialize(cp, section);
164 UNSERIALIZE_SCALAR(_perfLevel);
165 perfLevel(_perfLevel);
166}
167
|
102SrcClockDomain *
103SrcClockDomainParams::create()
104{
105 return new SrcClockDomain(this);
106}
107
108DerivedClockDomain::DerivedClockDomain(const Params *p) :
109 ClockDomain(p, p->clk_domain->voltageDomain()),
110 parent(*p->clk_domain),
111 clockDivider(p->clk_divider)
112{
113 // Ensure that clock divider setting works as frequency divider and never
114 // work as frequency multiplier
115 if (clockDivider < 1) {
116 fatal("Clock divider param cannot be less than 1");
117 }
118
119 // let the parent keep track of this derived domain so that it can
120 // propagate changes
121 parent.addDerivedDomain(this);
122
123 // update our clock period based on the parents clock
124 updateClockPeriod();
125}
126
127void
128DerivedClockDomain::updateClockPeriod()
129{
130 // Align all members to the current tick
131 for (auto m = members.begin(); m != members.end(); ++m) {
132 (*m)->updateClockPeriod();
133 }
134
135 // recalculate the clock period, relying on the fact that changes
136 // propagate downwards in the tree
137 _clockPeriod = parent.clockPeriod() * clockDivider;
138
139 DPRINTF(ClockDomain,
140 "Setting clock period to %d ticks for derived clock %s\n",
141 _clockPeriod, name());
142
143 // inform any derived clocks
144 for (auto c = children.begin(); c != children.end(); ++c) {
145 (*c)->updateClockPeriod();
146 }
147}
148
149DerivedClockDomain *
150DerivedClockDomainParams::create()
151{
152 return new DerivedClockDomain(this);
153}
| 168SrcClockDomain *
169SrcClockDomainParams::create()
170{
171 return new SrcClockDomain(this);
172}
173
174DerivedClockDomain::DerivedClockDomain(const Params *p) :
175 ClockDomain(p, p->clk_domain->voltageDomain()),
176 parent(*p->clk_domain),
177 clockDivider(p->clk_divider)
178{
179 // Ensure that clock divider setting works as frequency divider and never
180 // work as frequency multiplier
181 if (clockDivider < 1) {
182 fatal("Clock divider param cannot be less than 1");
183 }
184
185 // let the parent keep track of this derived domain so that it can
186 // propagate changes
187 parent.addDerivedDomain(this);
188
189 // update our clock period based on the parents clock
190 updateClockPeriod();
191}
192
193void
194DerivedClockDomain::updateClockPeriod()
195{
196 // Align all members to the current tick
197 for (auto m = members.begin(); m != members.end(); ++m) {
198 (*m)->updateClockPeriod();
199 }
200
201 // recalculate the clock period, relying on the fact that changes
202 // propagate downwards in the tree
203 _clockPeriod = parent.clockPeriod() * clockDivider;
204
205 DPRINTF(ClockDomain,
206 "Setting clock period to %d ticks for derived clock %s\n",
207 _clockPeriod, name());
208
209 // inform any derived clocks
210 for (auto c = children.begin(); c != children.end(); ++c) {
211 (*c)->updateClockPeriod();
212 }
213}
214
215DerivedClockDomain *
216DerivedClockDomainParams::create()
217{
218 return new DerivedClockDomain(this);
219}
|