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/*
* Copyright (c) 2014 ARM Limited
* 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 __CPU_PRED_INDIRECT_BASE_HH__
#define __CPU_PRED_INDIRECT_BASE_HH__
#include "arch/types.hh"
#include "config/the_isa.hh"
#include "cpu/inst_seq.hh"
#include "params/IndirectPredictor.hh"
#include "sim/sim_object.hh"
class IndirectPredictor : public SimObject
{
public:
typedef IndirectPredictorParams Params;
IndirectPredictor(const Params &params)
: SimObject(params)
{
}
virtual bool lookup(Addr br_addr, TheISA::PCState& br_target,
ThreadID tid) = 0;
virtual void recordIndirect(Addr br_addr, Addr tgt_addr,
InstSeqNum seq_num, ThreadID tid) = 0;
virtual void commit(InstSeqNum seq_num, ThreadID tid,
void * indirect_history) = 0;
virtual void squash(InstSeqNum seq_num, ThreadID tid) = 0;
virtual void recordTarget(InstSeqNum seq_num, void * indirect_history,
const TheISA::PCState& target, ThreadID tid) = 0;
virtual void genIndirectInfo(ThreadID tid, void* & indirect_history) = 0;
virtual void updateDirectionInfo(ThreadID tid, bool actually_taken) = 0;
virtual void deleteIndirectInfo(ThreadID tid, void * indirect_history) = 0;
virtual void changeDirectionPrediction(ThreadID tid,
void * indirect_history,
bool actually_taken) = 0;
};
#endif // __CPU_PRED_INDIRECT_BASE_HH__