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/*
* Copyright 2019 Google, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Gabe Black
*/
#ifndef __DEV_INTPIN_HH__
#define __DEV_INTPIN_HH__
#include "sim/port.hh"
class IntSourcePinBase;
class IntSinkPinBase : public Port
{
protected:
friend IntSourcePinBase;
IntSourcePinBase *source = nullptr;
int _number = 0;
bool _state = false;
IntSinkPinBase(const std::string &_name, PortID _id, int num) :
Port(_name, _id), _number(num)
{}
virtual void raiseOnDevice() = 0;
virtual void lowerOnDevice() = 0;
void
raise()
{
_state = true;
raiseOnDevice();
}
void
lower()
{
_state = false;
lowerOnDevice();
}
public:
int number() { return _number; }
bool state() { return _state; }
void bind(Port &peer) override;
void unbind() override;
};
template <class Device>
class IntSinkPin : public IntSinkPinBase
{
private:
Device *device = nullptr;
void raiseOnDevice() override { device->raiseInterruptPin(number()); }
void lowerOnDevice() override { device->lowerInterruptPin(number()); }
public:
IntSinkPin(const std::string &_name, PortID _id, Device *dev, int num) :
IntSinkPinBase(_name, _id, num), device(dev) {}
IntSinkPin(const std::string &_name, PortID _id, Device *dev) :
IntSinkPin(_name, _id, dev, _id) {}
};
class IntSourcePinBase : public Port
{
private:
IntSinkPinBase *sink = nullptr;
bool _state = false;
public:
IntSourcePinBase(const std::string &_name, PortID _id, bool def_state) :
Port(_name, _id), _state(def_state)
{}
void raise() { sink->raise(); }
void lower() { sink->lower(); }
void bind(Port &peer) override;
void unbind() override;
};
template <class Device>
class IntSourcePin : public IntSourcePinBase
{
public:
IntSourcePin(const std::string &_name, PortID _id, Device *owner,
bool def_state=false) :
IntSourcePinBase(_name, _id, def_state)
{}
};
#endif //__DEV_INTPIN_HH__
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