DirectoryMemory.hh

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/*
 * Copyright (c) 2017,2019 ARM Limited
 * All rights reserved.
 *
 * The license below extends only to copyright in the software and shall
 * not be construed as granting a license to any other intellectual
 * property including but not limited to intellectual property relating
 * to a hardware implementation of the functionality of the software
 * licensed hereunder.  You may use the software subject to the license
 * terms below provided that you ensure that this notice is replicated
 * unmodified and in its entirety in all distributions of the software,
 * modified or unmodified, in source code or in binary form.
 *
 * 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
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#ifndef __MEM_RUBY_STRUCTURES_DIRECTORYMEMORY_HH__
#define __MEM_RUBY_STRUCTURES_DIRECTORYMEMORY_HH__
 
#include <iostream>
#include <string>
 
#include "base/addr_range.hh"
#include "mem/ruby/common/Address.hh"
#include "mem/ruby/protocol/DirectoryRequestType.hh"
#include "mem/ruby/slicc_interface/AbstractCacheEntry.hh"
#include "params/RubyDirectoryMemory.hh"
#include "sim/sim_object.hh"
 
namespace gem5
{
 
namespace ruby
{
 
class DirectoryMemory : public SimObject
{
  public:
    typedef RubyDirectoryMemoryParams Params;
    DirectoryMemory(const Params &p);
    ~DirectoryMemory();
 
    void init();
 
    uint64_t mapAddressToLocalIdx(Addr address);
 
    uint64_t getSize() { return m_size_bytes; }
 
    bool isPresent(Addr address);
    AbstractCacheEntry *lookup(Addr address);
    AbstractCacheEntry *allocate(Addr address, AbstractCacheEntry* new_entry);
 
    // Explicitly free up this address
    void deallocate(Addr address);
 
    void print(std::ostream& out) const;
    void recordRequestType(DirectoryRequestType requestType);
 
  private:
    // Private copy constructor and assignment operator
    DirectoryMemory(const DirectoryMemory& obj);
    DirectoryMemory& operator=(const DirectoryMemory& obj);
 
  private:
    const std::string m_name;
    AbstractCacheEntry **m_entries;
    // int m_size;  // # of memory module blocks this directory is
                    // responsible for
    uint64_t m_size_bytes;
    uint64_t m_size_bits;
    uint64_t m_num_entries;
 
    const AddrRangeList addrRanges;
};
 
inline std::ostream&
operator<<(std::ostream& out, const DirectoryMemory& obj)
{
    obj.print(out);
    out << std::flush;
    return out;
}
 
} // namespace ruby
} // namespace gem5
 
#endif // __MEM_RUBY_STRUCTURES_DIRECTORYMEMORY_HH__