1/*
2 * Copyright (c) 2013 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated

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32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Vasileios Spiliopoulos
38 * Akash Bagdia
39 * Andreas Hansson
40 */
41
42#include "debug/ClockDomain.hh"
43#include "params/ClockDomain.hh"
44#include "params/DerivedClockDomain.hh"
45#include "params/SrcClockDomain.hh"
46#include "sim/clock_domain.hh"
47#include "sim/voltage_domain.hh"
48
49double
50ClockDomain::voltage() const
51{
52 return _voltageDomain->voltage();
53}
54
55SrcClockDomain::SrcClockDomain(const Params *p) :

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60
61void
62SrcClockDomain::clockPeriod(Tick clock_period)
63{
64 if (clock_period == 0) {
65 fatal("%s has a clock period of zero\n", name());
66 }
67
68 _clockPeriod = clock_period;
69
70 DPRINTF(ClockDomain,
71 "Setting clock period to %d ticks for source clock %s\n",
72 _clockPeriod, name());
73
74 // inform any derived clocks they need to updated their period
75 for (auto c = children.begin(); c != children.end(); ++c) {

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100
101 // update our clock period based on the parents clock
102 updateClockPeriod();
103}
104
105void
106DerivedClockDomain::updateClockPeriod()
107{
108 // recalculate the clock period, relying on the fact that changes
109 // propagate downwards in the tree
110 _clockPeriod = parent.clockPeriod() * clockDivider;
111
112 DPRINTF(ClockDomain,
113 "Setting clock period to %d ticks for derived clock %s\n",
114 _clockPeriod, name());
115
116 // inform any derived clocks
117 for (auto c = children.begin(); c != children.end(); ++c) {
118 (*c)->updateClockPeriod();
119 }
120}
121
122DerivedClockDomain *
123DerivedClockDomainParams::create()
124{
125 return new DerivedClockDomain(this);
126}