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/*
* Copyright (c) 2011-2014, 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) 2002-2005 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.
*/
/**
* @file
*
* ExecContext bears the exec_context interface for Minor.
*/
#ifndef __CPU_MINOR_EXEC_CONTEXT_HH__
#define __CPU_MINOR_EXEC_CONTEXT_HH__
#include "cpu/exec_context.hh"
#include "cpu/minor/execute.hh"
#include "cpu/minor/pipeline.hh"
#include "cpu/base.hh"
#include "cpu/simple_thread.hh"
#include "mem/request.hh"
#include "debug/MinorExecute.hh"
namespace gem5
{
GEM5_DEPRECATED_NAMESPACE(Minor, minor);
namespace minor
{
/* Forward declaration of Execute */
class Execute;
/** ExecContext bears the exec_context interface for Minor. This nicely
* separates that interface from other classes such as Pipeline, MinorCPU
* and DynMinorInst and makes it easier to see what state is accessed by it.
*/
class ExecContext : public gem5::ExecContext
{
public:
MinorCPU &cpu;
/** ThreadState object, provides all the architectural state. */
SimpleThread &thread;
/** The execute stage so we can peek at its contents. */
Execute &execute;
/** Instruction for the benefit of memory operations and for PC */
MinorDynInstPtr inst;
ExecContext (
MinorCPU &cpu_,
SimpleThread &thread_, Execute &execute_,
MinorDynInstPtr inst_) :
cpu(cpu_),
thread(thread_),
execute(execute_),
inst(inst_)
{
DPRINTF(MinorExecute, "ExecContext setting PC: %s\n", *inst->pc);
pcState(*inst->pc);
setPredicate(inst->readPredicate());
setMemAccPredicate(inst->readMemAccPredicate());
}
~ExecContext()
{
inst->setPredicate(readPredicate());
inst->setMemAccPredicate(readMemAccPredicate());
}
Fault
initiateMemRead(Addr addr, unsigned int size,
Request::Flags flags,
const std::vector<bool>& byte_enable) override
{
assert(byte_enable.size() == size);
return execute.getLSQ().pushRequest(inst, true /* load */, nullptr,
size, addr, flags, nullptr, nullptr, byte_enable);
}
Fault
initiateMemMgmtCmd(Request::Flags flags) override
{
panic("ExecContext::initiateMemMgmtCmd() not implemented "
" on MinorCPU\n");
return NoFault;
}
Fault
writeMem(uint8_t *data, unsigned int size, Addr addr,
Request::Flags flags, uint64_t *res,
const std::vector<bool>& byte_enable)
override
{
assert(byte_enable.size() == size);
return execute.getLSQ().pushRequest(inst, false /* store */, data,
size, addr, flags, res, nullptr, byte_enable);
}
Fault
initiateMemAMO(Addr addr, unsigned int size, Request::Flags flags,
AtomicOpFunctorPtr amo_op) override
{
// AMO requests are pushed through the store path
return execute.getLSQ().pushRequest(inst, false /* amo */, nullptr,
size, addr, flags, nullptr, std::move(amo_op),
std::vector<bool>(size, true));
}
RegVal
getRegOperand(const StaticInst *si, int idx) override
{
const RegId &reg = si->srcRegIdx(idx);
if (reg.is(InvalidRegClass))
return 0;
return thread.getReg(reg);
}
void
getRegOperand(const StaticInst *si, int idx, void *val) override
{
thread.getReg(si->srcRegIdx(idx), val);
}
void *
getWritableRegOperand(const StaticInst *si, int idx) override
{
return thread.getWritableReg(si->destRegIdx(idx));
}
void
setRegOperand(const StaticInst *si, int idx, RegVal val) override
{
const RegId &reg = si->destRegIdx(idx);
if (reg.is(InvalidRegClass))
return;
thread.setReg(si->destRegIdx(idx), val);
}
void
setRegOperand(const StaticInst *si, int idx, const void *val) override
{
thread.setReg(si->destRegIdx(idx), val);
}
bool
readPredicate() const override
{
return thread.readPredicate();
}
void
setPredicate(bool val) override
{
thread.setPredicate(val);
}
bool
readMemAccPredicate() const override
{
return thread.readMemAccPredicate();
}
void
setMemAccPredicate(bool val) override
{
thread.setMemAccPredicate(val);
}
// hardware transactional memory
uint64_t
getHtmTransactionUid() const override
{
panic("ExecContext::getHtmTransactionUid() not"
"implemented on MinorCPU\n");
return 0;
}
uint64_t
newHtmTransactionUid() const override
{
panic("ExecContext::newHtmTransactionUid() not"
"implemented on MinorCPU\n");
return 0;
}
bool
inHtmTransactionalState() const override
{
// ExecContext::inHtmTransactionalState() not
// implemented on MinorCPU
return false;
}
uint64_t
getHtmTransactionalDepth() const override
{
panic("ExecContext::getHtmTransactionalDepth() not"
"implemented on MinorCPU\n");
return 0;
}
const PCStateBase &
pcState() const override
{
return thread.pcState();
}
void
pcState(const PCStateBase &val) override
{
thread.pcState(val);
}
RegVal
readMiscRegNoEffect(int misc_reg) const
{
return thread.readMiscRegNoEffect(misc_reg);
}
RegVal
readMiscReg(int misc_reg) override
{
return thread.readMiscReg(misc_reg);
}
void
setMiscReg(int misc_reg, RegVal val) override
{
thread.setMiscReg(misc_reg, val);
}
RegVal
readMiscRegOperand(const StaticInst *si, int idx) override
{
const RegId& reg = si->srcRegIdx(idx);
assert(reg.is(MiscRegClass));
return thread.readMiscReg(reg.index());
}
void
setMiscRegOperand(const StaticInst *si, int idx, RegVal val) override
{
const RegId& reg = si->destRegIdx(idx);
assert(reg.is(MiscRegClass));
return thread.setMiscReg(reg.index(), val);
}
ThreadContext *tcBase() const override { return thread.getTC(); }
/* @todo, should make stCondFailures persistent somewhere */
unsigned int readStCondFailures() const override { return 0; }
void setStCondFailures(unsigned int st_cond_failures) override {}
ContextID contextId() { return thread.contextId(); }
/* ISA-specific (or at least currently ISA singleton) functions */
/* X86: TLB twiddling */
void
demapPage(Addr vaddr, uint64_t asn) override
{
thread.getMMUPtr()->demapPage(vaddr, asn);
}
BaseCPU *getCpuPtr() { return &cpu; }
public:
// monitor/mwait funtions
void
armMonitor(Addr address) override
{
getCpuPtr()->armMonitor(inst->id.threadId, address);
}
bool
mwait(PacketPtr pkt) override
{
return getCpuPtr()->mwait(inst->id.threadId, pkt);
}
void
mwaitAtomic(ThreadContext *tc) override
{
return getCpuPtr()->mwaitAtomic(inst->id.threadId, tc, thread.mmu);
}
AddressMonitor *
getAddrMonitor() override
{
return getCpuPtr()->getCpuAddrMonitor(inst->id.threadId);
}
};
} // namespace minor
} // namespace gem5
#endif /* __CPU_MINOR_EXEC_CONTEXT_HH__ */