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/*
* Copyright (c) 2007 MIPS Technologies, Inc.
* 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: Korey Sewell
*
*/
#ifndef __CPU_INORDER_COMM_HH__
#define __CPU_INORDER_COMM_HH__
#include <vector>
#include "arch/isa_traits.hh"
#include "base/types.hh"
#include "cpu/inorder/inorder_dyn_inst.hh"
#include "cpu/inorder/pipeline_traits.hh"
#include "cpu/inst_seq.hh"
/** Struct that defines the information passed from in between stages */
/** This information mainly goes forward through the pipeline. */
struct InterStageStruct {
//@todo: probably should make this a list since the amount of
// instructions that get passed forward per cycle is
// really dependent on issue width, CPI, etc.
std::vector<ThePipeline::DynInstPtr> insts;
// Add any information that needs to be passed forward to stages
// below ...
};
/** Struct that defines all backwards communication. */
struct TimeStruct {
struct StageComm {
bool squash;
InstSeqNum doneSeqNum;
bool uncached;
ThePipeline::DynInstPtr uncachedLoad;
StageComm()
: squash(false), doneSeqNum(0), uncached(false), uncachedLoad(NULL)
{ }
};
StageComm stageInfo[ThePipeline::NumStages][ThePipeline::MaxThreads];
bool stageBlock[ThePipeline::NumStages][ThePipeline::MaxThreads];
bool stageUnblock[ThePipeline::NumStages][ThePipeline::MaxThreads];
TimeStruct()
{
for (int i = 0; i < ThePipeline::NumStages; i++) {
for (int j = 0; j < ThePipeline::MaxThreads; j++) {
stageBlock[i][j] = false;
stageUnblock[i][j] = false;
}
}
}
};
#endif //__CPU_INORDER_COMM_HH__
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