2004-02-11 22:07:55 +01:00
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/*
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2005-06-05 11:16:00 +02:00
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* Copyright (c) 2004-2005 The Regents of The University of Michigan
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2004-02-11 22:07:55 +01:00
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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2005-01-15 10:12:25 +01:00
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#ifndef __DEV_IO_DEVICE_HH__
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#define __DEV_IO_DEVICE_HH__
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2004-02-11 22:07:55 +01:00
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2006-01-31 20:20:39 +01:00
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#include "base/chunk_generator.hh"
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#include "mem/port.hh"
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#include "sim/eventq.hh"
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2004-02-11 22:07:55 +01:00
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class Bus;
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class Platform;
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class PioDevice;
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2004-02-11 22:07:55 +01:00
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2006-01-31 20:20:39 +01:00
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class PioPort : public Port
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2004-02-11 22:07:55 +01:00
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{
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protected:
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2006-01-31 20:20:39 +01:00
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PioDevice *device;
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virtual bool recvTiming(Packet &pkt);
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virtual Tick recvAtomic(Packet &pkt)
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{ return device->recvAtomic(pkt) };
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virtual void recvFunctional(Packet &pkt)
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{ device->recvAtomic(pkt) };
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virtual void recvAddressRangeQuery(std::list<Range<Addr> > &range_list,
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bool &owner)
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{ device->addressRanges(range_list, owner); }
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void sendTiming(Packet &pkt, Tick time)
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{ new SendEvent(this, pkt, time); }
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class SendEvent : public Event
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{
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PioPort *port;
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Packet packet;
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SendEvent(PioPort *p, Packet &pkt, Tick t)
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: Event(&mainEventQueue), packet(pkt)
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{ schedule(curTick + t); }
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virtual void process();
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virtual const char *description()
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{ return "Future scheduled sendTiming event"; }
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friend class PioPort;
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}
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public:
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PioPort(PioDevice *dev)
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: device(dev)
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{ }
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};
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class DmaPort : public Port
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{
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protected:
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PioDevice *device;
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std::list<Packet*> transmitList;
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virtual bool recvTiming(Packet &pkt)
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{ completionEvent->schedule(curTick+1); completionEvent = NULL; }
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virtual Tick recvAtomic(Packet &pkt)
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{ panic("dma port shouldn't be used for pio access."); }
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virtual void recvFunctional(Packet &pkt)
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{ panic("dma port shouldn't be used for pio access."); }
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virtual void recvStatusChange(Status status)
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{ ; }
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virtual Packet *recvRetry()
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{ return transmitList.pop_front(); }
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virtual void recvAddressRangeQuery(std::list<Range<Addr> > &range_list,
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bool &owner)
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{ range_list.clear(); owner = true; }
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void dmaAction(Memory::Command cmd, DmaPort port, Addr addr, int size,
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Event *event, uint8_t *data = NULL);
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void sendDma(Packet &pkt);
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virtual Packet *recvRetry()
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{ return transmitList.pop_front(); }
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class SendEvent : public Event
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{
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PioPort *port;
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Packet packet;
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SendEvent(PioPort *p, Packet &pkt, Tick t)
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: Event(&mainEventQueue), packet(pkt)
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{ schedule(curTick + t); }
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virtual void process();
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virtual const char *description()
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{ return "Future scheduled sendTiming event"; }
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friend class PioPort;
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}
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public:
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DmaPort(DmaDevice *dev)
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: device(dev)
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{ }
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};
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class PioDevice : public SimObject
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{
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protected:
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Platform *platform;
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PioPort *pioPort;
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virtual void addressRanges(std::list<Range<Addr> > &range_list,
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bool &owner) = 0;
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virtual read(Packet &pkt) = 0;
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virtual write(Packet &pkt) = 0;
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Tick recvAtomic(Packet &pkt)
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{ return pkt->cmd == Read ? this->read(pkt) : this->write(pkt); }
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public:
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PioDevice(const std::string &name, Platform *p);
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virtual ~PioDevice();
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virtual Port *getPort(std::string if_name)
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{
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if (if_name == "pio")
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return pioPort;
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else
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return NULL;
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}
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};
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class DmaDevice : public PioDevice
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{
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protected:
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2006-01-31 20:20:39 +01:00
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DmaPort *dmaPort;
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2004-02-11 22:07:55 +01:00
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public:
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DmaDevice(const std::string &name, Platform *p);
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virtual ~DmaDevice();
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virtual Port *getPort(std::string if_name)
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{
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if (if_name == "pio")
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return pioPort;
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else if (if_name = "dma")
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return dmaPort;
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else
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return NULL;
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}
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2004-02-11 22:07:55 +01:00
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};
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2006-01-31 20:20:39 +01:00
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2005-01-15 10:12:25 +01:00
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#endif // __DEV_IO_DEVICE_HH__
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