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/*
* Copyright (c) 2010 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Copyright (c) 2004-2006 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.
*
* Authors: Kevin Lim
*/
#include "base/cp_annotate.hh"
#include "cpu/o3/dyn_inst.hh"
template <class Impl>
BaseO3DynInst<Impl>::BaseO3DynInst(StaticInstPtr staticInst,
TheISA::PCState pc, TheISA::PCState predPC,
InstSeqNum seq_num, O3CPU *cpu)
: BaseDynInst<Impl>(staticInst, pc, predPC, seq_num, cpu)
{
initVars();
}
template <class Impl>
BaseO3DynInst<Impl>::BaseO3DynInst(StaticInstPtr &_staticInst)
: BaseDynInst<Impl>(_staticInst)
{
initVars();
}
template <class Impl>
void
BaseO3DynInst<Impl>::initVars()
{
// Make sure to have the renamed register entries set to the same
// as the normal register entries. It will allow the IQ to work
// without any modifications.
for (int i = 0; i < this->staticInst->numDestRegs(); i++) {
this->_destRegIdx[i] = this->staticInst->destRegIdx(i);
}
for (int i = 0; i < this->staticInst->numSrcRegs(); i++) {
this->_srcRegIdx[i] = this->staticInst->srcRegIdx(i);
this->_readySrcRegIdx[i] = 0;
}
_numDestMiscRegs = 0;
#if TRACING_ON
fetchTick = 0;
decodeTick = 0;
renameTick = 0;
dispatchTick = 0;
issueTick = 0;
completeTick = 0;
#endif
}
template <class Impl>
Fault
BaseO3DynInst<Impl>::execute()
{
// @todo: Pretty convoluted way to avoid squashing from happening
// when using the TC during an instruction's execution
// (specifically for instructions that have side-effects that use
// the TC). Fix this.
bool in_syscall = this->thread->inSyscall;
this->thread->inSyscall = true;
this->fault = this->staticInst->execute(this, this->traceData);
this->thread->inSyscall = in_syscall;
return this->fault;
}
template <class Impl>
Fault
BaseO3DynInst<Impl>::initiateAcc()
{
// @todo: Pretty convoluted way to avoid squashing from happening
// when using the TC during an instruction's execution
// (specifically for instructions that have side-effects that use
// the TC). Fix this.
bool in_syscall = this->thread->inSyscall;
this->thread->inSyscall = true;
this->fault = this->staticInst->initiateAcc(this, this->traceData);
this->thread->inSyscall = in_syscall;
return this->fault;
}
template <class Impl>
Fault
BaseO3DynInst<Impl>::completeAcc(PacketPtr pkt)
{
// @todo: Pretty convoluted way to avoid squashing from happening
// when using the TC during an instruction's execution
// (specifically for instructions that have side-effects that use
// the TC). Fix this.
bool in_syscall = this->thread->inSyscall;
this->thread->inSyscall = true;
this->fault = this->staticInst->completeAcc(pkt, this, this->traceData);
this->thread->inSyscall = in_syscall;
return this->fault;
}
#if FULL_SYSTEM
template <class Impl>
Fault
BaseO3DynInst<Impl>::hwrei()
{
#if THE_ISA == ALPHA_ISA
// Can only do a hwrei when in pal mode.
if (!(this->instAddr() & 0x3))
return new AlphaISA::UnimplementedOpcodeFault;
// Set the next PC based on the value of the EXC_ADDR IPR.
AlphaISA::PCState pc = this->pcState();
pc.npc(this->cpu->readMiscRegNoEffect(AlphaISA::IPR_EXC_ADDR,
this->threadNumber));
this->pcState(pc);
if (CPA::available()) {
ThreadContext *tc = this->cpu->tcBase(this->threadNumber);
CPA::cpa()->swAutoBegin(tc, this->nextInstAddr());
}
// Tell CPU to clear any state it needs to if a hwrei is taken.
this->cpu->hwrei(this->threadNumber);
#else
#endif
// FIXME: XXX check for interrupts? XXX
return NoFault;
}
template <class Impl>
void
BaseO3DynInst<Impl>::trap(Fault fault)
{
this->cpu->trap(fault, this->threadNumber, this->staticInst);
}
template <class Impl>
bool
BaseO3DynInst<Impl>::simPalCheck(int palFunc)
{
#if THE_ISA != ALPHA_ISA
panic("simPalCheck called, but PAL only exists in Alpha!\n");
#endif
return this->cpu->simPalCheck(palFunc, this->threadNumber);
}
#else
template <class Impl>
void
BaseO3DynInst<Impl>::syscall(int64_t callnum)
{
// HACK: check CPU's nextPC before and after syscall. If it
// changes, update this instruction's nextPC because the syscall
// must have changed the nextPC.
TheISA::PCState curPC = this->cpu->pcState(this->threadNumber);
this->cpu->syscall(callnum, this->threadNumber);
TheISA::PCState newPC = this->cpu->pcState(this->threadNumber);
if (!(curPC == newPC)) {
this->pcState(newPC);
}
}
#endif
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