src/cpu/minor/exec_context.hh - public/gem5 - Git at Google

 /*
  * 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
 {

 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__ */
	/*
	* 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
	{

	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__ */