voltage_domain.hh (10022:db307bac42fc) | voltage_domain.hh (10249:6bbb7ae309ac) |
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1/* 2 * Copyright (c) 2012 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 --- 27 unchanged lines hidden (view full) --- 36 * 37 * Authors: Vasileios Spiliopoulos 38 * Akash Bagdia 39 */ 40 41#ifndef __SIM_VOLTAGE_DOMAIN_HH__ 42#define __SIM_VOLTAGE_DOMAIN_HH__ 43 | 1/* 2 * Copyright (c) 2012 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 --- 27 unchanged lines hidden (view full) --- 36 * 37 * Authors: Vasileios Spiliopoulos 38 * Akash Bagdia 39 */ 40 41#ifndef __SIM_VOLTAGE_DOMAIN_HH__ 42#define __SIM_VOLTAGE_DOMAIN_HH__ 43 |
44#include <vector> 45 |
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44#include "base/statistics.hh" 45#include "params/VoltageDomain.hh" | 46#include "base/statistics.hh" 47#include "params/VoltageDomain.hh" |
48#include "sim/clock_domain.hh" |
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46#include "sim/sim_object.hh" 47 48/** 49 * A VoltageDomain is used to group clock domains that operate under 50 * the same voltage. The class provides methods for setting and 51 * getting the voltage. 52 */ 53class VoltageDomain : public SimObject 54{ | 49#include "sim/sim_object.hh" 50 51/** 52 * A VoltageDomain is used to group clock domains that operate under 53 * the same voltage. The class provides methods for setting and 54 * getting the voltage. 55 */ 56class VoltageDomain : public SimObject 57{ |
58 public: |
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55 | 59 |
56 private: | 60 typedef VoltageDomainParams Params; 61 VoltageDomain(const Params *p); |
57 58 /** | 62 63 /** |
59 * The voltage of the domain expressed in Volts | 64 * Get the current voltage. 65 * 66 * @return Voltage of the domain |
60 */ | 67 */ |
61 double _voltage; | 68 double voltage() const { return voltageOpPoints[_perfLevel]; } |
62 | 69 |
70 uint32_t numVoltages() const { return (uint32_t)voltageOpPoints.size(); } 71 72 typedef SrcClockDomain::PerfLevel PerfLevel; 73 |
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63 /** | 74 /** |
64 * Stat for reporting voltage of the domain | 75 * Set the voltage point of the domain. 76 * @param Voltage value to be set |
65 */ | 77 */ |
66 Stats::Value currentVoltage; | 78 void perfLevel(PerfLevel perf_level); |
67 | 79 |
68 public: | 80 /** 81 * Get the voltage point of the domain. 82 * @param Voltage value to be set 83 */ 84 PerfLevel perfLevel() const { return _perfLevel; } |
69 | 85 |
70 typedef VoltageDomainParams Params; 71 VoltageDomain(const Params *p); | 86 /** 87 * Register a SrcClockDomain with this voltage domain. 88 * @param src_clock_domain The SrcClockDomain to register. 89 */ 90 void registerSrcClockDom(SrcClockDomain *src_clock_dom) { 91 assert(src_clock_dom->voltageDomain() == this); 92 srcClockChildren.push_back(src_clock_dom); 93 } |
72 73 /** | 94 95 /** |
74 * Get the current volate. 75 * 76 * @return Voltage of the domain | 96 * Startup has all SrcClockDomains registered with this voltage domain, so 97 * try to make sure that all perf level requests from them are met. |
77 */ | 98 */ |
78 inline double voltage() const { return _voltage; } | 99 void startup(); |
79 80 /** | 100 101 /** |
81 * Set the voltage of the domain. | 102 * Recomputes the highest (fastest, i.e., numerically lowest) requested 103 * performance level of all associated clock domains, and updates the 104 * performance level of this voltage domain to match. This means that for 105 * two connected clock domains, one fast and one slow, the voltage domain 106 * will provide the voltage associated with the fast DVFS operation point. 107 * Must be called whenever a clock domain decides to swtich its performance 108 * level. |
82 * | 109 * |
83 * @param Voltage value to be set | 110 * @return True, if the voltage was actually changed. |
84 */ | 111 */ |
85 void voltage(double voltage); | 112 bool sanitiseVoltages(); |
86 87 void regStats(); 88 | 113 114 void regStats(); 115 |
116 void serialize(std::ostream &os); 117 void unserialize(Checkpoint *cp, const std::string §ion); 118 private: 119 typedef std::vector<double> Voltages; 120 /** 121 * List of possible minimum voltage at each of the frequency operational 122 * points, should be in descending order and same size as freqOpPoints. 123 * An empty list corresponds to default voltage specified for the voltage 124 * domain its clock domain belongs. The same voltage is applied for each 125 * freqOpPoints, overall implying NO DVS 126 */ 127 const Voltages voltageOpPoints; 128 PerfLevel _perfLevel; 129 130 /** 131 * Stat for reporting voltage of the domain 132 */ 133 Stats::Value currentVoltage; 134 135 /** 136 * List of associated SrcClockDomains that are connected to this voltage 137 * domain. 138 */ 139 typedef std::vector<SrcClockDomain *> SrcClockChildren; 140 SrcClockChildren srcClockChildren; |
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89}; 90 91#endif | 141}; 142 143#endif |