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/*
* Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
* 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;
* 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.
*/
#ifndef __MEM_RUBY_STRUCTURES_TBETABLE_HH__
#define __MEM_RUBY_STRUCTURES_TBETABLE_HH__
#include <iostream>
#include <unordered_map>
#include "mem/ruby/common/Address.hh"
template<class ENTRY>
class TBETable
{
public:
TBETable(int number_of_TBEs)
: m_number_of_TBEs(number_of_TBEs)
{
}
bool isPresent(Addr address) const;
void allocate(Addr address);
void deallocate(Addr address);
bool
areNSlotsAvailable(int n, Tick current_time) const
{
return (m_number_of_TBEs - m_map.size()) >= n;
}
ENTRY *lookup(Addr address);
// Print cache contents
void print(std::ostream& out) const;
private:
// Private copy constructor and assignment operator
TBETable(const TBETable& obj);
TBETable& operator=(const TBETable& obj);
// Data Members (m_prefix)
std::unordered_map<Addr, ENTRY> m_map;
private:
int m_number_of_TBEs;
};
template<class ENTRY>
inline std::ostream&
operator<<(std::ostream& out, const TBETable<ENTRY>& obj)
{
obj.print(out);
out << std::flush;
return out;
}
template<class ENTRY>
inline bool
TBETable<ENTRY>::isPresent(Addr address) const
{
assert(address == makeLineAddress(address));
assert(m_map.size() <= m_number_of_TBEs);
return !!m_map.count(address);
}
template<class ENTRY>
inline void
TBETable<ENTRY>::allocate(Addr address)
{
assert(!isPresent(address));
assert(m_map.size() < m_number_of_TBEs);
m_map[address] = ENTRY();
}
template<class ENTRY>
inline void
TBETable<ENTRY>::deallocate(Addr address)
{
assert(isPresent(address));
assert(m_map.size() > 0);
m_map.erase(address);
}
// looks an address up in the cache
template<class ENTRY>
inline ENTRY*
TBETable<ENTRY>::lookup(Addr address)
{
if(m_map.find(address) != m_map.end()) return &(m_map.find(address)->second);
return NULL;
}
template<class ENTRY>
inline void
TBETable<ENTRY>::print(std::ostream& out) const
{
}
#endif // __MEM_RUBY_STRUCTURES_TBETABLE_HH__
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