blob: 396ecfe43a2624811d1871a0a81cabebdfee95d8 [file] [log] [blame]
/*
* Copyright (c) 2011-2012, 2016-2018, 2020-2021 Arm Limited
* Copyright (c) 2013 Advanced Micro Devices, Inc.
* 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) 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.
*/
#ifndef __CPU_CHECKER_THREAD_CONTEXT_HH__
#define __CPU_CHECKER_THREAD_CONTEXT_HH__
#include "arch/generic/pcstate.hh"
#include "cpu/checker/cpu.hh"
#include "cpu/simple_thread.hh"
#include "cpu/thread_context.hh"
#include "debug/Checker.hh"
namespace gem5
{
/**
* Derived ThreadContext class for use with the Checker. The template
* parameter is the ThreadContext class used by the specific CPU being
* verified. This CheckerThreadContext is then used by the main CPU
* in place of its usual ThreadContext class. It handles updating the
* checker's state any time state is updated externally through the
* ThreadContext.
*/
template <class TC>
class CheckerThreadContext : public ThreadContext
{
public:
CheckerThreadContext(TC *actual_tc,
CheckerCPU *checker_cpu)
: actualTC(actual_tc), checkerTC(checker_cpu->thread),
checkerCPU(checker_cpu)
{ }
private:
/** The main CPU's ThreadContext, or class that implements the
* ThreadContext interface. */
TC *actualTC;
/** The checker's own SimpleThread. Will be updated any time
* anything uses this ThreadContext to externally update a
* thread's state. */
SimpleThread *checkerTC;
/** Pointer to the checker CPU. */
CheckerCPU *checkerCPU;
public:
bool
schedule(PCEvent *e) override
{
[[maybe_unused]] bool check_ret = checkerTC->schedule(e);
bool actual_ret = actualTC->schedule(e);
assert(actual_ret == check_ret);
return actual_ret;
}
bool
remove(PCEvent *e) override
{
[[maybe_unused]] bool check_ret = checkerTC->remove(e);
bool actual_ret = actualTC->remove(e);
assert(actual_ret == check_ret);
return actual_ret;
}
void
scheduleInstCountEvent(Event *event, Tick count) override
{
actualTC->scheduleInstCountEvent(event, count);
}
void
descheduleInstCountEvent(Event *event) override
{
actualTC->descheduleInstCountEvent(event);
}
Tick
getCurrentInstCount() override
{
return actualTC->getCurrentInstCount();
}
BaseCPU *getCpuPtr() override { return actualTC->getCpuPtr(); }
uint32_t socketId() const override { return actualTC->socketId(); }
int cpuId() const override { return actualTC->cpuId(); }
ContextID contextId() const override { return actualTC->contextId(); }
void
setContextId(ContextID id) override
{
actualTC->setContextId(id);
checkerTC->setContextId(id);
}
/** Returns this thread's ID number. */
int threadId() const override { return actualTC->threadId(); }
void
setThreadId(int id) override
{
checkerTC->setThreadId(id);
actualTC->setThreadId(id);
}
BaseMMU *getMMUPtr() override { return actualTC->getMMUPtr(); }
CheckerCPU *
getCheckerCpuPtr() override
{
return checkerCPU;
}
BaseISA *getIsaPtr() const override { return actualTC->getIsaPtr(); }
InstDecoder *
getDecoderPtr() override
{
return actualTC->getDecoderPtr();
}
System *getSystemPtr() override { return actualTC->getSystemPtr(); }
Process *getProcessPtr() override { return actualTC->getProcessPtr(); }
void setProcessPtr(Process *p) override { actualTC->setProcessPtr(p); }
void
connectMemPorts(ThreadContext *tc)
{
actualTC->connectMemPorts(tc);
}
Status status() const override { return actualTC->status(); }
void
setStatus(Status new_status) override
{
actualTC->setStatus(new_status);
checkerTC->setStatus(new_status);
}
/// Set the status to Active.
void activate() override { actualTC->activate(); }
/// Set the status to Suspended.
void suspend() override { actualTC->suspend(); }
/// Set the status to Halted.
void halt() override { actualTC->halt(); }
void
takeOverFrom(ThreadContext *oldContext) override
{
actualTC->takeOverFrom(oldContext);
checkerTC->copyState(oldContext);
}
void
regStats(const std::string &name) override
{
actualTC->regStats(name);
checkerTC->regStats(name);
}
Tick readLastActivate() override { return actualTC->readLastActivate(); }
Tick readLastSuspend() override { return actualTC->readLastSuspend(); }
// @todo: Do I need this?
void
copyArchRegs(ThreadContext *tc) override
{
actualTC->copyArchRegs(tc);
checkerTC->copyArchRegs(tc);
}
void
clearArchRegs() override
{
actualTC->clearArchRegs();
checkerTC->clearArchRegs();
}
//
// New accessors for new decoder.
//
RegVal
getReg(const RegId &reg) const override
{
return actualTC->getReg(reg);
}
void
getReg(const RegId &reg, void *val) const override
{
actualTC->getReg(reg, val);
}
void *
getWritableReg(const RegId &reg) override
{
return actualTC->getWritableReg(reg);
}
void
setReg(const RegId &reg, RegVal val) override
{
actualTC->setReg(reg, val);
checkerTC->setReg(reg, val);
}
void
setReg(const RegId &reg, const void *val) override
{
actualTC->setReg(reg, val);
checkerTC->setReg(reg, val);
}
/** Reads this thread's PC state. */
const PCStateBase &pcState() const override { return actualTC->pcState(); }
/** Sets this thread's PC state. */
void
pcState(const PCStateBase &val) override
{
DPRINTF(Checker, "Changing PC to %s, old PC %s\n",
val, checkerTC->pcState());
checkerTC->pcState(val);
checkerCPU->recordPCChange(val);
return actualTC->pcState(val);
}
void
pcStateNoRecord(const PCStateBase &val) override
{
return actualTC->pcState(val);
}
RegVal
readMiscRegNoEffect(RegIndex misc_reg) const override
{
return actualTC->readMiscRegNoEffect(misc_reg);
}
RegVal
readMiscReg(RegIndex misc_reg) override
{
return actualTC->readMiscReg(misc_reg);
}
void
setMiscRegNoEffect(RegIndex misc_reg, RegVal val) override
{
DPRINTF(Checker, "Setting misc reg with no effect: %d to both Checker"
" and O3..\n", misc_reg);
checkerTC->setMiscRegNoEffect(misc_reg, val);
actualTC->setMiscRegNoEffect(misc_reg, val);
}
void
setMiscReg(RegIndex misc_reg, RegVal val) override
{
DPRINTF(Checker, "Setting misc reg with effect: %d to both Checker"
" and O3..\n", misc_reg);
checkerTC->setMiscReg(misc_reg, val);
actualTC->setMiscReg(misc_reg, val);
}
unsigned
readStCondFailures() const override
{
return actualTC->readStCondFailures();
}
void
setStCondFailures(unsigned sc_failures) override
{
actualTC->setStCondFailures(sc_failures);
}
// hardware transactional memory
void
htmAbortTransaction(uint64_t htm_uid, HtmFailureFaultCause cause) override
{
panic("function not implemented");
}
BaseHTMCheckpointPtr&
getHtmCheckpointPtr() override
{
return actualTC->getHtmCheckpointPtr();
}
void
setHtmCheckpointPtr(BaseHTMCheckpointPtr new_cpt) override
{
panic("function not implemented");
}
};
} // namespace gem5
#endif // __CPU_CHECKER_EXEC_CONTEXT_HH__