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IODevice.h
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85 lines (79 loc) · 3.13 KB
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/*
* syn
* Copyright (c) 2013-2017, Joshua Scoggins and Contributors
* All rights reserved.
*
* 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.
*
* 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 HOLDER 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.
*/
/**
* The concept of an IO devices which is mapped into memory
*/
#ifndef SYN_IO_DEVICE_H_
#define SYN_IO_DEVICE_H_
#include <tuple>
#include <functional>
#include <iostream>
#include <memory>
#include <random>
#include <future>
#include "Problem.h"
#include "BaseArithmetic.h"
#include "Device.h"
namespace syn {
template<typename Data, typename Address = Data>
class IODevice : public Device {
public:
using AddressType = Address;
using DataType = Data;
public:
IODevice() { }
virtual ~IODevice() { }
virtual Data read(Address targetAddress) = 0;
virtual void write(Address targetAddress, Data value) = 0;
virtual void initialize() override { }
virtual void shutdown() override { }
};
template<typename Data, typename Address = Data>
class AddressableIODevice : public IODevice<Data, Address> {
public:
using Parent = IODevice<Data, Address>;
public:
AddressableIODevice(Address base, Address length = 1) : Parent(), _base(base), _length(length) { }
virtual ~AddressableIODevice() { }
virtual Address baseAddress() const noexcept { return _base; }
virtual Address endAddress() const noexcept { return _base == 0 ? _length : (_base + _length); }
virtual Address size() const noexcept { return _length; }
virtual bool respondsTo(Address targetAddress, Address length = 1) const noexcept {
for (auto i = targetAddress; i < targetAddress + length; ++i) {
if (syn::inRangeExcludingMaximum<Address>(targetAddress, _base, endAddress())) {
return true;
}
}
return false;
}
virtual Address computeInternalAddress(Address addr) const noexcept {
return addr - _base;
}
protected:
Address _base;
Address _length;
};
} // end namespace syn
#endif // end SYN_IO_DEVICE_H_