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/*
* Copyright (c) 2004-2005 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 __DEV_IO_DEVICE_HH__
#define __DEV_IO_DEVICE_HH__
#include "base/chunk_generator.hh"
#include "mem/port.hh"
#include "sim/eventq.hh"
class Bus;
class Platform;
class PioDevice;
class PioPort : public Port
{
protected:
PioDevice *device;
virtual bool recvTiming(Packet &pkt);
virtual Tick recvAtomic(Packet &pkt)
{ return device->recvAtomic(pkt) };
virtual void recvFunctional(Packet &pkt)
{ device->recvAtomic(pkt) };
virtual void getDeviceAddressRanges(AddrRangeList &range_list, bool &owner)
{ device->addressRanges(range_list, owner); }
void sendTiming(Packet &pkt, Tick time)
{ new SendEvent(this, pkt, time); }
class SendEvent : public Event
{
PioPort *port;
Packet packet;
SendEvent(PioPort *p, Packet &pkt, Tick t)
: Event(&mainEventQueue), packet(pkt)
{ schedule(curTick + t); }
virtual void process();
virtual const char *description()
{ return "Future scheduled sendTiming event"; }
friend class PioPort;
}
public:
PioPort(PioDevice *dev)
: device(dev)
{ }
};
class DmaPort : public Port
{
protected:
PioDevice *device;
std::list<Packet*> transmitList;
virtual bool recvTiming(Packet &pkt)
{ completionEvent->schedule(curTick+1); completionEvent = NULL; }
virtual Tick recvAtomic(Packet &pkt)
{ panic("dma port shouldn't be used for pio access."); }
virtual void recvFunctional(Packet &pkt)
{ panic("dma port shouldn't be used for pio access."); }
virtual void recvStatusChange(Status status)
{ ; }
virtual Packet *recvRetry()
{ return transmitList.pop_front(); }
virtual void getDeviceAddressRanges(AddrRangeList &range_list, bool &owner)
{ range_list.clear(); owner = true; }
void dmaAction(Memory::Command cmd, DmaPort port, Addr addr, int size,
Event *event, uint8_t *data = NULL);
void sendDma(Packet &pkt);
virtual Packet *recvRetry()
{ return transmitList.pop_front(); }
class SendEvent : public Event
{
PioPort *port;
Packet packet;
SendEvent(PioPort *p, Packet &pkt, Tick t)
: Event(&mainEventQueue), packet(pkt)
{ schedule(curTick + t); }
virtual void process();
virtual const char *description()
{ return "Future scheduled sendTiming event"; }
friend class PioPort;
}
public:
DmaPort(DmaDevice *dev)
: device(dev)
{ }
};
class PioDevice : public SimObject
{
protected:
Platform *platform;
PioPort *pioPort;
virtual void addressRanges(AddrRangeList &range_list, bool &owner) = 0;
virtual read(Packet &pkt) = 0;
virtual write(Packet &pkt) = 0;
Tick recvAtomic(Packet &pkt)
{ return pkt->cmd == Read ? this->read(pkt) : this->write(pkt); }
public:
PioDevice(const std::string &name, Platform *p);
virtual ~PioDevice();
virtual Port *getPort(std::string if_name)
{
if (if_name == "pio")
return pioPort;
else
return NULL;
}
};
class DmaDevice : public PioDevice
{
protected:
DmaPort *dmaPort;
public:
DmaDevice(const std::string &name, Platform *p);
virtual ~DmaDevice();
virtual Port *getPort(std::string if_name)
{
if (if_name == "pio")
return pioPort;
else if (if_name = "dma")
return dmaPort;
else
return NULL;
}
};
#endif // __DEV_IO_DEVICE_HH__
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