2 * Copyright (c) 2010 ARM Limited
5 * The license below extends only to copyright in the software and shall
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40 #ifndef __DEV_ARM_SP804_HH__
41 #define __DEV_ARM_SP804_HH__
43 #include "base/range.hh"
44 #include "dev/arm/amba_device.hh"
45 #include "params/Sp804.hh"
48 * This implements the dual Sp804 timer block
53 class Sp804 : public AmbaDevice
73 Bitfield<1> timerSize;
74 Bitfield<3,2> timerPrescale;
75 Bitfield<5> intEnable;
76 Bitfield<6> timerMode;
77 Bitfield<7> timerEnable;
83 /** Pointer to parent class */
86 /** Number of interrupt to cause/clear */
89 /** Number of ticks in a clock input */
92 /** Control register as specified above */
95 /** If timer has caused an interrupt. This is irrespective of
99 /** If an interrupt is currently pending. Logical and of CTRL.intEnable
103 /** Value to load into counter when periodic mode reaches 0 */
106 /** Called when the counter reaches 0 */
107 void counterAtZero();
108 EventWrapper<Timer, &Timer::counterAtZero> zeroEvent;
111 /** Restart the counter ticking at val
112 * @param val the value to start at (pre-16 bit masking if en) */
113 void restartCounter(uint32_t val);
115 Timer(std::string __name, Sp804 *parent, int int_num, Tick clock);
117 std::string name() const { return _name; }
119 /** Handle read for a single timer */
120 void read(PacketPtr pkt, Addr daddr);
122 /** Handle write for a single timer */
123 void write(PacketPtr pkt, Addr daddr);
125 void serialize(std::ostream &os);
126 void unserialize(Checkpoint *cp, const std::string §ion);
130 /** Pointer to the GIC for causing an interrupt */
133 /** Timers that do the actual work */
138 typedef Sp804Params Params;
142 return dynamic_cast<const Params *>(_params);
145 * The constructor for RealView just registers itself with the MMU.
146 * @param p params structure
151 * Handle a read to the device
152 * @param pkt The memory request.
153 * @param data Where to put the data.
155 virtual Tick read(PacketPtr pkt);
158 * All writes are simply ignored.
159 * @param pkt The memory request.
160 * @param data the data
162 virtual Tick write(PacketPtr pkt);
165 virtual void serialize(std::ostream &os);
166 virtual void unserialize(Checkpoint *cp, const std::string §ion);
170 #endif // __DEV_ARM_SP804_HH__