gem5/src/arch/mips/tlb.hh

/*
 * Copyright (c) 2006 The Regents of The University of Michigan
 * 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.
 *
 * Authors: Gabe Black
 */

#ifndef __ARCH_MIPS_TLB_HH__
#define __ARCH_MIPS_TLB_HH__

#include "params/MipsDTB.hh"
#include "params/MipsITB.hh"
#include "sim/tlb.hh"

namespace MipsISA
{
    struct TlbEntry
    {
        Addr _pageStart;
        TlbEntry() {}
        TlbEntry(Addr asn, Addr vaddr, Addr paddr) : _pageStart(paddr) {}

        Addr pageStart()
        {
            return _pageStart;
        }

        void serialize(std::ostream &os);
        void unserialize(Checkpoint *cp, const std::string &section);
    };

    class TLB : public GenericTLB
    {
      public:
        typedef MipsTLBParams Params;
        TLB(const Params *p) : GenericTLB(p)
        {}

        Fault translate(RequestPtr req, ThreadContext *tc, bool=false);
    };

    class ITB : public TLB
    {
      public:
        typedef MipsITBParams Params;
        ITB(const Params *p) : TLB(p)
        {}
    };

    class DTB : public TLB
    {
      public:
        typedef MipsDTBParams Params;
        DTB(const Params *p) : TLB(p)
        {}
    };
};

#endif // __ARCH_MIPS_TLB_HH__