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-/*
- * Copyright (c) 2004-2005 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.
- */
-
-#ifndef __CPU_BETA_CPU_COMM_HH__
-#define __CPU_BETA_CPU_COMM_HH__
-
-#include <vector>
-
-#include "arch/alpha/isa_traits.hh"
-#include "cpu/inst_seq.hh"
-#include "sim/host.hh"
-
-// Find better place to put this typedef.
-// The impl might be the best place for this.
-typedef short int PhysRegIndex;
-
-template<class Impl>
-struct SimpleFetchSimpleDecode {
- typedef typename Impl::DynInstPtr DynInstPtr;
-
- int size;
-
- DynInstPtr insts[Impl::MaxWidth];
-};
-
-template<class Impl>
-struct SimpleDecodeSimpleRename {
- typedef typename Impl::DynInstPtr DynInstPtr;
-
- int size;
-
- DynInstPtr insts[Impl::MaxWidth];
-};
-
-template<class Impl>
-struct SimpleRenameSimpleIEW {
- typedef typename Impl::DynInstPtr DynInstPtr;
-
- int size;
-
- DynInstPtr insts[Impl::MaxWidth];
-};
-
-template<class Impl>
-struct SimpleIEWSimpleCommit {
- typedef typename Impl::DynInstPtr DynInstPtr;
-
- int size;
-
- DynInstPtr insts[Impl::MaxWidth];
-
- bool squash;
- bool branchMispredict;
- bool branchTaken;
- uint64_t mispredPC;
- uint64_t nextPC;
- InstSeqNum squashedSeqNum;
-};
-
-template<class Impl>
-struct IssueStruct {
- typedef typename Impl::DynInstPtr DynInstPtr;
-
- int size;
-
- DynInstPtr insts[Impl::MaxWidth];
-};
-
-struct TimeBufStruct {
- struct decodeComm {
- bool squash;
- bool stall;
- bool predIncorrect;
- uint64_t branchAddr;
-
- InstSeqNum doneSeqNum;
-
- // Might want to package this kind of branch stuff into a single
- // struct as it is used pretty frequently.
- bool branchMispredict;
- bool branchTaken;
- uint64_t mispredPC;
- uint64_t nextPC;
- };
-
- decodeComm decodeInfo;
-
- // Rename can't actually tell anything to squash or send a new PC back
- // because it doesn't do anything along those lines. But maybe leave
- // these fields in here to keep the stages mostly orthagonal.
- struct renameComm {
- bool squash;
- bool stall;
-
- uint64_t nextPC;
- };
-
- renameComm renameInfo;
-
- struct iewComm {
- bool stall;
-
- // Also eventually include skid buffer space.
- unsigned freeIQEntries;
- };
-
- iewComm iewInfo;
-
- struct commitComm {
- bool squash;
- bool stall;
- unsigned freeROBEntries;
-
- bool branchMispredict;
- bool branchTaken;
- uint64_t mispredPC;
- uint64_t nextPC;
-
- bool robSquashing;
-
- // Represents the instruction that has either been retired or
- // squashed. Similar to having a single bus that broadcasts the
- // retired or squashed sequence number.
- InstSeqNum doneSeqNum;
-
- // Extra bit of information so that the LDSTQ only updates when it
- // needs to.
- bool commitIsLoad;
-
- // Communication specifically to the IQ to tell the IQ that it can
- // schedule a non-speculative instruction.
- InstSeqNum nonSpecSeqNum;
- };
-
- commitComm commitInfo;
-};
-
-#endif //__CPU_BETA_CPU_COMM_HH__