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/*
* 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.
*
* Authors: Steve Reinhardt
*/
#ifndef __CPU_SIMPLE_ATOMIC_HH__
#define __CPU_SIMPLE_ATOMIC_HH__
#include "cpu/simple/base.hh"
class AtomicSimpleCPU : public BaseSimpleCPU
{
public:
struct Params : public BaseSimpleCPU::Params {
int width;
bool simulate_stalls;
};
AtomicSimpleCPU(Params *params);
virtual ~AtomicSimpleCPU();
virtual void init();
public:
//
enum Status {
Running,
Idle,
SwitchedOut
};
protected:
Status _status;
Status status() const { return _status; }
private:
struct TickEvent : public Event
{
AtomicSimpleCPU *cpu;
TickEvent(AtomicSimpleCPU *c);
void process();
const char *description();
};
TickEvent tickEvent;
const int width;
const bool simulate_stalls;
// main simulation loop (one cycle)
void tick();
class CpuPort : public Port
{
AtomicSimpleCPU *cpu;
public:
CpuPort(const std::string &_name, AtomicSimpleCPU *_cpu)
: Port(_name), cpu(_cpu)
{ }
protected:
virtual bool recvTiming(Packet *pkt);
virtual Tick recvAtomic(Packet *pkt);
virtual void recvFunctional(Packet *pkt);
virtual void recvStatusChange(Status status);
virtual void recvRetry();
virtual void getDeviceAddressRanges(AddrRangeList &resp,
AddrRangeList &snoop)
{ resp.clear(); snoop.clear(); }
};
CpuPort icachePort;
CpuPort dcachePort;
Request *ifetch_req;
Packet *ifetch_pkt;
Request *data_read_req;
Packet *data_read_pkt;
Request *data_write_req;
Packet *data_write_pkt;
bool dcache_access;
Tick dcache_latency;
public:
virtual Port *getPort(const std::string &if_name, int idx = -1);
virtual void serialize(std::ostream &os);
virtual void unserialize(Checkpoint *cp, const std::string §ion);
void switchOut();
void takeOverFrom(BaseCPU *oldCPU);
virtual void activateContext(int thread_num, int delay);
virtual void suspendContext(int thread_num);
template <class T>
Fault read(Addr addr, T &data, unsigned flags);
template <class T>
Fault write(T data, Addr addr, unsigned flags, uint64_t *res);
};
#endif // __CPU_SIMPLE_ATOMIC_HH__
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