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/*
* Copyright (c) 2003 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.
*/
/**
* @file
* Declaration of a memory trace CPU object. Uses a memory trace to drive the
* provided memory hierarchy.
*/
#ifndef __TRACE_CPU_HH__
#define __TRACE_CPU_HH__
#include <string>
#include "cpu/base_cpu.hh"
#include "mem/mem_req.hh" // for MemReqPtr
#include "sim/eventq.hh" // for Event
// Forward declaration.
class MemInterface;
class MemTraceReader;
/**
* A cpu object for running memory traces through a memory hierarchy.
*/
class TraceCPU : public BaseCPU
{
/** Interface for instruction trace requests, if any. */
MemInterface *icacheInterface;
/** Interface for data trace requests, if any. */
MemInterface *dcacheInterface;
/** Instruction reference trace. */
MemTraceReader *instTrace;
/** Data reference trace. */
MemTraceReader *dataTrace;
/** Number of Icache read ports. */
int icachePorts;
/** Number of Dcache read/write ports. */
int dcachePorts;
/** Number of outstanding requests. */
int outstandingRequests;
/** Cycle of the next instruction request, 0 if not available. */
Tick nextInstCycle;
/** Cycle of the next data request, 0 if not available. */
Tick nextDataCycle;
/** Next instruction request. */
MemReqPtr nextInstReq;
/** Next data request. */
MemReqPtr nextDataReq;
/**
* Event to call the TraceCPU::tick
*/
class TickEvent : public Event
{
private:
/** The associated CPU */
TraceCPU *cpu;
public:
/**
* Construct this event;
*/
TickEvent(TraceCPU *c);
/**
* Call the tick function.
*/
void process();
/**
* Return a string description of this event.
*/
const char *description();
};
TickEvent tickEvent;
public:
/**
* Construct a TraceCPU object.
*/
TraceCPU(const std::string &name,
MemInterface *icache_interface,
MemInterface *dcache_interface,
MemTraceReader *inst_trace,
MemTraceReader *data_trace,
int icache_ports,
int dcache_ports);
/**
* Perform all the accesses for one cycle.
*/
void tick();
/**
* Handle a completed memory request.
*/
void completeRequest(MemReqPtr &req);
};
class TraceCompleteEvent : public Event
{
MemReqPtr req;
TraceCPU *tester;
public:
TraceCompleteEvent(MemReqPtr &_req, TraceCPU *_tester)
: Event(&mainEventQueue), req(_req), tester(_tester)
{
setFlags(AutoDelete);
}
void process();
virtual const char *description();
};
#endif //__TRACE_CPU_HH__
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