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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31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 */
40
41/**
42 * @file
43 * ClockDomain declarations.
44 */
45
46#ifndef __SIM_CLOCK_DOMAIN_HH__
47#define __SIM_CLOCK_DOMAIN_HH__
48
49#include "base/statistics.hh"
50#include "params/ClockDomain.hh"
51#include "params/DerivedClockDomain.hh"
52#include "params/SrcClockDomain.hh"
53#include "sim/sim_object.hh"
54
55/**
56 * Forward declaration
57 */
58class DerivedClockDomain;
59class VoltageDomain;
60
61/**
62 * The ClockDomain provides clock to group of clocked objects bundled
63 * under the same clock domain. The clock domains, in turn, are
64 * grouped into voltage domains. The clock domains provide support for
65 * a hierarchial structure with source and derived domains.
66 */
67class ClockDomain : public SimObject

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81 VoltageDomain *_voltageDomain;
82
83 /**
84 * Pointers to potential derived clock domains so we can propagate
85 * changes.
86 */
87 std::vector<DerivedClockDomain*> children;
88
89 public:
90
91 typedef ClockDomainParams Params;
92 ClockDomain(const Params *p, VoltageDomain *voltage_domain) :
93 SimObject(p),
94 _clockPeriod(0),
95 _voltageDomain(voltage_domain) {}
96
97 /**
98 * Get the clock period.
99 *
100 * @return Clock period in ticks
101 */
102 inline Tick clockPeriod() const { return _clockPeriod; }
103
104 /**
105 * Get the voltage domain.
106 *
107 * @return Voltage domain this clock domain belongs to
108 */
109 inline VoltageDomain *voltageDomain() const { return _voltageDomain; }
110
111
112 /**

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140 SrcClockDomain(const Params *p);
141
142 /**
143 * Set new clock value
144 * @param clock The new clock period in ticks
145 */
146 void clockPeriod(Tick clock_period);
147
148};
149
150/**
151 * The derived clock domains provides the notion of a clock domain
152 * that is connected to a parent clock domain that can either be a
153 * source clock domain or a derived clock domain. It maintains the
154 * clock divider and provides methods for getting the clock.
155 */

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