2 * Copyright (c) 2010 ARM Limited
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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 AmbaDevice
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(std::ostream &os);
125 void unserialize(Checkpoint *cp, const std::string §ion);
129 /** Pointer to the GIC for causing an interrupt */
132 /** Timers that do the actual work */
137 typedef Sp804Params Params;
141 return dynamic_cast<const Params *>(_params);
144 * The constructor for RealView just registers itself with the MMU.
145 * @param p params structure
150 * Handle a read to the device
151 * @param pkt The memory request.
152 * @param data Where to put the data.
154 virtual Tick read(PacketPtr pkt);
157 * All writes are simply ignored.
158 * @param pkt The memory request.
159 * @param data the data
161 virtual Tick write(PacketPtr pkt);
164 virtual void serialize(std::ostream &os);
165 virtual void unserialize(Checkpoint *cp, const std::string §ion);
169 #endif // __DEV_ARM_SP804_HH__