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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_TIMING_HH__
#define __CPU_SIMPLE_TIMING_HH__
#include "cpu/simple/base.hh"
class TimingSimpleCPU : public BaseSimpleCPU
{
public:
struct Params : public BaseSimpleCPU::Params {
};
TimingSimpleCPU(Params *params);
virtual ~TimingSimpleCPU();
virtual void init();
public:
//
enum Status {
Idle,
Running,
IcacheRetry,
IcacheWaitResponse,
IcacheWaitSwitch,
DcacheRetry,
DcacheWaitResponse,
DcacheWaitSwitch,
SwitchedOut
};
protected:
Status _status;
Status status() const { return _status; }
Event *drainEvent;
Event *fetchEvent;
private:
class CpuPort : public Port
{
protected:
TimingSimpleCPU *cpu;
Tick lat;
public:
CpuPort(const std::string &_name, TimingSimpleCPU *_cpu, Tick _lat)
: Port(_name), cpu(_cpu), lat(_lat)
{ }
protected:
virtual Tick recvAtomic(Packet *pkt);
virtual void recvFunctional(Packet *pkt);
virtual void recvStatusChange(Status status);
virtual void getDeviceAddressRanges(AddrRangeList &resp,
AddrRangeList &snoop)
{ resp.clear(); snoop.clear(); snoop.push_back(RangeSize(0,-1)); }
struct TickEvent : public Event
{
Packet *pkt;
TimingSimpleCPU *cpu;
TickEvent(TimingSimpleCPU *_cpu)
:Event(&mainEventQueue), cpu(_cpu) {}
const char *description() { return "Timing CPU clock event"; }
void schedule(Packet *_pkt, Tick t);
};
};
class IcachePort : public CpuPort
{
public:
IcachePort(TimingSimpleCPU *_cpu, Tick _lat)
: CpuPort(_cpu->name() + "-iport", _cpu, _lat), tickEvent(_cpu)
{ }
protected:
virtual bool recvTiming(Packet *pkt);
virtual void recvRetry();
struct ITickEvent : public TickEvent
{
ITickEvent(TimingSimpleCPU *_cpu)
: TickEvent(_cpu) {}
void process();
const char *description() { return "Timing CPU clock event"; }
};
ITickEvent tickEvent;
};
class DcachePort : public CpuPort
{
public:
DcachePort(TimingSimpleCPU *_cpu, Tick _lat)
: CpuPort(_cpu->name() + "-dport", _cpu, _lat), tickEvent(_cpu)
{ }
protected:
virtual bool recvTiming(Packet *pkt);
virtual void recvRetry();
struct DTickEvent : public TickEvent
{
DTickEvent(TimingSimpleCPU *_cpu)
: TickEvent(_cpu) {}
void process();
const char *description() { return "Timing CPU clock event"; }
};
DTickEvent tickEvent;
};
IcachePort icachePort;
DcachePort dcachePort;
Packet *ifetch_pkt;
Packet *dcache_pkt;
int cpu_id;
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);
virtual unsigned int drain(Event *drain_event);
virtual void resume();
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);
void fetch();
void completeIfetch(Packet *);
void completeDataAccess(Packet *);
void advanceInst(Fault fault);
private:
void completeDrain();
};
#endif // __CPU_SIMPLE_TIMING_HH__
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