91a84c5b3c
This patch eliminates the type Address defined by the ruby memory system. This memory system would now use the type Addr that is in use by the rest of the system.
192 lines
5.6 KiB
C++
192 lines
5.6 KiB
C++
/*
|
|
* 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_PERFECTCACHEMEMORY_HH__
|
|
#define __MEM_RUBY_STRUCTURES_PERFECTCACHEMEMORY_HH__
|
|
|
|
#include "base/hashmap.hh"
|
|
#include "mem/protocol/AccessPermission.hh"
|
|
#include "mem/ruby/common/Address.hh"
|
|
|
|
template<class ENTRY>
|
|
struct PerfectCacheLineState
|
|
{
|
|
PerfectCacheLineState() { m_permission = AccessPermission_NUM; }
|
|
AccessPermission m_permission;
|
|
ENTRY m_entry;
|
|
};
|
|
|
|
template<class ENTRY>
|
|
inline std::ostream&
|
|
operator<<(std::ostream& out, const PerfectCacheLineState<ENTRY>& obj)
|
|
{
|
|
return out;
|
|
}
|
|
|
|
template<class ENTRY>
|
|
class PerfectCacheMemory
|
|
{
|
|
public:
|
|
PerfectCacheMemory();
|
|
|
|
// tests to see if an address is present in the cache
|
|
bool isTagPresent(Addr address) const;
|
|
|
|
// Returns true if there is:
|
|
// a) a tag match on this address or there is
|
|
// b) an Invalid line in the same cache "way"
|
|
bool cacheAvail(Addr address) const;
|
|
|
|
// find an Invalid entry and sets the tag appropriate for the address
|
|
void allocate(Addr address);
|
|
|
|
void deallocate(Addr address);
|
|
|
|
// Returns with the physical address of the conflicting cache line
|
|
Addr cacheProbe(Addr newAddress) const;
|
|
|
|
// looks an address up in the cache
|
|
ENTRY* lookup(Addr address);
|
|
const ENTRY* lookup(Addr address) const;
|
|
|
|
// Get/Set permission of cache block
|
|
AccessPermission getPermission(Addr address) const;
|
|
void changePermission(Addr address, AccessPermission new_perm);
|
|
|
|
// Print cache contents
|
|
void print(std::ostream& out) const;
|
|
|
|
private:
|
|
// Private copy constructor and assignment operator
|
|
PerfectCacheMemory(const PerfectCacheMemory& obj);
|
|
PerfectCacheMemory& operator=(const PerfectCacheMemory& obj);
|
|
|
|
// Data Members (m_prefix)
|
|
m5::hash_map<Addr, PerfectCacheLineState<ENTRY> > m_map;
|
|
};
|
|
|
|
template<class ENTRY>
|
|
inline std::ostream&
|
|
operator<<(std::ostream& out, const PerfectCacheMemory<ENTRY>& obj)
|
|
{
|
|
obj.print(out);
|
|
out << std::flush;
|
|
return out;
|
|
}
|
|
|
|
template<class ENTRY>
|
|
inline
|
|
PerfectCacheMemory<ENTRY>::PerfectCacheMemory()
|
|
{
|
|
}
|
|
|
|
// tests to see if an address is present in the cache
|
|
template<class ENTRY>
|
|
inline bool
|
|
PerfectCacheMemory<ENTRY>::isTagPresent(Addr address) const
|
|
{
|
|
return m_map.count(makeLineAddress(address)) > 0;
|
|
}
|
|
|
|
template<class ENTRY>
|
|
inline bool
|
|
PerfectCacheMemory<ENTRY>::cacheAvail(Addr address) const
|
|
{
|
|
return true;
|
|
}
|
|
|
|
// find an Invalid or already allocated entry and sets the tag
|
|
// appropriate for the address
|
|
template<class ENTRY>
|
|
inline void
|
|
PerfectCacheMemory<ENTRY>::allocate(Addr address)
|
|
{
|
|
PerfectCacheLineState<ENTRY> line_state;
|
|
line_state.m_permission = AccessPermission_Invalid;
|
|
line_state.m_entry = ENTRY();
|
|
m_map[makeLineAddress(address)] = line_state;
|
|
}
|
|
|
|
// deallocate entry
|
|
template<class ENTRY>
|
|
inline void
|
|
PerfectCacheMemory<ENTRY>::deallocate(Addr address)
|
|
{
|
|
m_map.erase(makeLineAddress(address));
|
|
}
|
|
|
|
// Returns with the physical address of the conflicting cache line
|
|
template<class ENTRY>
|
|
inline Addr
|
|
PerfectCacheMemory<ENTRY>::cacheProbe(Addr newAddress) const
|
|
{
|
|
panic("cacheProbe called in perfect cache");
|
|
return newAddress;
|
|
}
|
|
|
|
// looks an address up in the cache
|
|
template<class ENTRY>
|
|
inline ENTRY*
|
|
PerfectCacheMemory<ENTRY>::lookup(Addr address)
|
|
{
|
|
return &m_map[makeLineAddress(address)].m_entry;
|
|
}
|
|
|
|
// looks an address up in the cache
|
|
template<class ENTRY>
|
|
inline const ENTRY*
|
|
PerfectCacheMemory<ENTRY>::lookup(Addr address) const
|
|
{
|
|
return &m_map[makeLineAddress(address)].m_entry;
|
|
}
|
|
|
|
template<class ENTRY>
|
|
inline AccessPermission
|
|
PerfectCacheMemory<ENTRY>::getPermission(Addr address) const
|
|
{
|
|
return m_map[makeLineAddress(address)].m_permission;
|
|
}
|
|
|
|
template<class ENTRY>
|
|
inline void
|
|
PerfectCacheMemory<ENTRY>::changePermission(Addr address,
|
|
AccessPermission new_perm)
|
|
{
|
|
Addr line_address = makeLineAddress(address);
|
|
PerfectCacheLineState<ENTRY>& line_state = m_map[line_address];
|
|
line_state.m_permission = new_perm;
|
|
}
|
|
|
|
template<class ENTRY>
|
|
inline void
|
|
PerfectCacheMemory<ENTRY>::print(std::ostream& out) const
|
|
{
|
|
}
|
|
|
|
#endif // __MEM_RUBY_STRUCTURES_PERFECTCACHEMEMORY_HH__
|