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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.
- */
-
-#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(AtomicSimpleCPU *_cpu)
- : cpu(_cpu)
- { }
-
- protected:
-
- virtual bool recvTiming(Packet *pkt);
-
- virtual Tick recvAtomic(Packet *pkt);
-
- virtual void recvFunctional(Packet *pkt);
-
- virtual void recvStatusChange(Status status);
-
- virtual Packet *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_complete;
-
- public:
-
- virtual void serialize(std::ostream &os);
- virtual void unserialize(Checkpoint *cp, const std::string &section);
-
- void switchOut(Sampler *s);
- 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__