emul_driver.hh

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/*
 * Copyright (c) 2014 Advanced Micro Devices, Inc.
 * 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.
 *
 * Author: Steve Reinhardt
 */
 
#ifndef __SIM_EMUL_DRIVER_HH
#define __SIM_EMUL_DRIVER_HH
 
#include <string>
 
#include "params/EmulatedDriver.hh"
#include "sim/sim_object.hh"
 
class Process;
class ThreadContext;
 
class EmulatedDriver : public SimObject
{
  protected:
    const std::string &filename;
 
  public:
    EmulatedDriver(EmulatedDriverParams *p)
        : SimObject(p), filename(p->filename)
    {
    }
 
    bool match(const std::string &s) const { return (s == filename); }
 
    virtual int open(ThreadContext *tc, int mode, int flags) = 0;
 
    virtual int ioctl(ThreadContext *tc, unsigned req, Addr buf) = 0;
 
    virtual Addr mmap(ThreadContext *tc, Addr start, uint64_t length,
                      int prot, int tgtFlags, int tgtFd, int offset)
                      { return -EBADF; }
};
 
#endif // __SIM_EMUL_DRIVER_HH