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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__
+