gem5/dev/io_device.cc
Nathan Binkert ec06c63cc7 make the dma interface useable.
make it so that pio devices must respond with some delay.

dev/io_device.cc:
    don't forget to include dma_interface.hh so we could use it.
dev/io_device.hh:
    the generic BusInterface isn't enough for doing DMA
    we need the actual DMAInterface

--HG--
extra : convert_revision : 70298d33c8520a3f4ad11aa600825a8cec7e44bf
2004-02-20 15:23:27 -05:00

52 lines
2 KiB
C++

/*
* Copyright (c) 2003 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.
*/
#include "dev/io_device.hh"
#include "mem/bus/base_interface.hh"
#include "mem/bus/dma_interface.hh"
PioDevice::PioDevice(const std::string &name)
: FunctionalMemory(name), pioInterface(NULL)
{}
PioDevice::~PioDevice()
{
if (pioInterface)
delete pioInterface;
}
DmaDevice::DmaDevice(const std::string &name)
: PioDevice(name), dmaInterface(NULL)
{}
DmaDevice::~DmaDevice()
{
if (dmaInterface)
delete dmaInterface;
}