1/* 2 * Copyright (c) 2012-2013 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 --- 41 unchanged lines hidden (view full) --- 50#include "base/intmath.hh" 51#include "base/misc.hh" 52#include "params/ClockedObject.hh" 53#include "sim/core.hh" 54#include "sim/clock_domain.hh" 55#include "sim/sim_object.hh" 56 57/** |
58 * Helper class for objects that need to be clocked. Clocked objects 59 * typically inherit from this class. Objects that need SimObject 60 * functionality as well should inherit from ClockedObject. |
61 */ |
62class Clocked |
63{ 64 65 private: |
66 // the tick value of the next clock edge (>= curTick()) at the 67 // time of the last call to update() 68 mutable Tick tick; 69 70 // The cycle counter value corresponding to the current value of 71 // 'tick' 72 mutable Cycles cycle; 73 74 /** |
75 * Align cycle and tick to the next clock edge if not already done. When 76 * complete, tick must be at least curTick(). 77 */ 78 void update() const 79 { 80 // both tick and cycle are up-to-date and we are done, note 81 // that the >= is important as it captures cases where tick 82 // has already passed curTick() --- 23 unchanged lines hidden (view full) --- 106 ClockDomain &clockDomain; 107 108 protected: 109 110 /** 111 * Create a clocked object and set the clock domain based on the 112 * parameters. 113 */ |
114 Clocked(ClockDomain &clk_domain) 115 : tick(0), cycle(0), clockDomain(clk_domain) |
116 { 117 // Register with the clock domain, so that if the clock domain 118 // frequency changes, we can update this object's tick. 119 clockDomain.registerWithClockDomain(this); 120 } 121 |
122 Clocked(Clocked &) = delete; 123 Clocked &operator=(Clocked &) = delete; 124 |
125 /** 126 * Virtual destructor due to inheritance. 127 */ |
128 virtual ~Clocked() { } |
129 130 /** 131 * Reset the object's clock using the current global tick value. Likely 132 * to be used only when the global clock is reset. Currently, this done 133 * only when Ruby is done warming up the memory system. 134 */ 135 void resetClock() const 136 { --- 75 unchanged lines hidden (view full) --- 212 return clockDomain.clockPeriod(); 213 } 214 215 inline Cycles ticksToCycles(Tick t) const 216 { return Cycles(divCeil(t, clockPeriod())); } 217 218}; 219 |
220/** 221 * The ClockedObject class extends the SimObject with a clock and 222 * accessor functions to relate ticks to the cycles of the object. 223 */ 224class ClockedObject 225 : public SimObject, public Clocked 226{ 227 public: 228 ClockedObject(const ClockedObjectParams *p) 229 : SimObject(p), Clocked(*p->clk_domain) { } 230}; 231 |
232#endif //__SIM_CLOCKED_OBJECT_HH__ |