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40 #ifndef __DEV_ARM_SP804_HH__
41 #define __DEV_ARM_SP804_HH__
43 #include "dev/arm/amba_device.hh"
44 #include "params/Sp804.hh"
47 * This implements the dual Sp804 timer block
52 class Sp804 : public AmbaPioDevice
55 class Timer : public Serializable
72 Bitfield<1> timerSize;
73 Bitfield<3,2> timerPrescale;
74 Bitfield<5> intEnable;
75 Bitfield<6> timerMode;
76 Bitfield<7> timerEnable;
82 /** Pointer to parent class */
85 /** Number of interrupt to cause/clear */
86 const uint32_t intNum;
88 /** Number of ticks in a clock input */
91 /** Control register as specified above */
94 /** If timer has caused an interrupt. This is irrespective of
98 /** If an interrupt is currently pending. Logical and of CTRL.intEnable
102 /** Value to load into counter when periodic mode reaches 0 */
105 /** Called when the counter reaches 0 */
106 void counterAtZero();
107 EventWrapper<Timer, &Timer::counterAtZero> zeroEvent;
110 /** Restart the counter ticking at val
111 * @param val the value to start at (pre-16 bit masking if en) */
112 void restartCounter(uint32_t val);
114 Timer(std::string __name, Sp804 *parent, int int_num, Tick clock);
116 std::string name() const { return _name; }
118 /** Handle read for a single timer */
119 void read(PacketPtr pkt, Addr daddr);
121 /** Handle write for a single timer */
122 void write(PacketPtr pkt, Addr daddr);
124 void serialize(CheckpointOut &cp) const override;
125 void unserialize(CheckpointIn &cp) override;
128 /** Pointer to the GIC for causing an interrupt */
131 /** Timers that do the actual work */
136 typedef Sp804Params Params;
140 return dynamic_cast<const Params *>(_params);
143 * The constructor for RealView just registers itself with the MMU.
144 * @param p params structure
149 * Handle a read to the device
150 * @param pkt The memory request.
151 * @param data Where to put the data.
153 Tick read(PacketPtr pkt) override;
156 * All writes are simply ignored.
157 * @param pkt The memory request.
158 * @param data the data
160 Tick write(PacketPtr pkt) override;
163 void serialize(CheckpointOut &cp) const override;
164 void unserialize(CheckpointIn &cp) override;
168 #endif // __DEV_ARM_SP804_HH__