dma_virt_device.hh

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/*
 * Copyright (c) 2021 Advanced Micro Devices, Inc.
 * All rights reserved.
 *
 * For use for simulation and test purposes only
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. Neither the name of the copyright holder 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"
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#ifndef __DEV_DMA_VIRT_DEVICE_HH__
#define __DEV_DMA_VIRT_DEVICE_HH__
 
#include "dev/dma_device.hh"
 
namespace gem5
{
 
class DmaVirtDevice : public DmaDevice
{
  private:
    Addr pageBytes;
 
  protected:
    template <class T>
    class DmaVirtCallback : public DmaCallback
    {
        std::function<void(const T &)> _function;
 
        virtual void
        process() override
        {
            _function(dmaBuffer);
        }
 
      public:
        T dmaBuffer;
 
        DmaVirtCallback(const std::function<void(const T &)> &function,
                      T dma_buffer_value = 0)
          : DmaCallback(), _function(function), dmaBuffer(dma_buffer_value)
        { }
    };
 
  public:
    DmaVirtDevice(const Params& p);
    virtual ~DmaVirtDevice() { }
 
    void dmaReadVirt(Addr host_addr, unsigned size, DmaCallback *cb,
                     void *data, Tick delay = 0);
    void dmaWriteVirt(Addr host_addr, unsigned size, DmaCallback *b,
                      void *data, Tick delay = 0);
 
    // Typedefing dmaRead and dmaWrite function pointer
    typedef void (DmaDevice::*DmaFnPtr)(Addr, int, Event*, uint8_t*, Tick);
 
    void dmaVirt(DmaFnPtr dmaFn, Addr host_addr, unsigned size,
                 DmaCallback *cb, void *data, Tick delay = 0);
 
    virtual void translateOrDie(Addr vaddr, Addr &paddr) = 0;
};
 
} // namespace gem5
 
#endif // __DEV_DMA_VIRT_DEVICE_HH__