gem5/dev/io_device.cc
Steve Reinhardt 796fa429fe Change Packet parameters on Port methods from references to pointers.
--HG--
extra : convert_revision : 7193e70304d4cbe1e4cbe16ce0d8527b2754d066
2006-05-18 22:32:21 -04:00

238 lines
6.1 KiB
C++

/*
* Copyright (c) 2006 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 "sim/builder.hh"
PioPort::PioPort(PioDevice *dev, Platform *p)
: device(dev), platform(p)
{ }
Tick
PioPort::recvAtomic(Packet *pkt)
{
return device->recvAtomic(pkt);
}
void
PioPort::recvFunctional(Packet *pkt)
{
device->recvAtomic(pkt);
}
void
PioPort::getDeviceAddressRanges(AddrRangeList &resp, AddrRangeList &snoop)
{
snoop.clear();
device->addressRanges(resp);
}
Packet *
PioPort::recvRetry()
{
Packet* pkt = transmitList.front();
transmitList.pop_front();
return pkt;
}
void
PioPort::SendEvent::process()
{
if (port->Port::sendTiming(packet) == Success)
return;
port->transmitList.push_back(packet);
}
bool
PioPort::recvTiming(Packet *pkt)
{
device->recvAtomic(pkt);
sendTiming(pkt, pkt->time - pkt->req->getTime());
return Success;
}
PioDevice::~PioDevice()
{
if (pioPort)
delete pioPort;
}
void
PioDevice::init()
{
if (!pioPort)
panic("Pio port not connected to anything!");
pioPort->sendStatusChange(Port::RangeChange);
}
void
BasicPioDevice::addressRanges(AddrRangeList &range_list)
{
assert(pioSize != 0);
range_list.clear();
range_list.push_back(RangeSize(pioAddr, pioSize));
}
DmaPort::DmaPort(DmaDevice *dev, Platform *p)
: device(dev), platform(p), pendingCount(0)
{ }
bool
DmaPort::recvTiming(Packet *pkt)
{
if (pkt->senderState) {
DmaReqState *state;
state = (DmaReqState*)pkt->senderState;
state->completionEvent->schedule(pkt->time - pkt->req->getTime());
delete pkt->req;
delete pkt;
} else {
delete pkt->req;
delete pkt;
}
return Success;
}
DmaDevice::DmaDevice(Params *p)
: PioDevice(p), dmaPort(NULL)
{ }
void
DmaPort::SendEvent::process()
{
if (port->Port::sendTiming(packet) == Success)
return;
port->transmitList.push_back(packet);
}
Packet *
DmaPort::recvRetry()
{
Packet* pkt = transmitList.front();
transmitList.pop_front();
return pkt;
}
void
DmaPort::dmaAction(Command cmd, Addr addr, int size, Event *event,
uint8_t *data)
{
assert(event);
int prevSize = 0;
Packet basePkt;
Request baseReq(false);
basePkt.flags = 0;
basePkt.coherence = NULL;
basePkt.senderState = NULL;
basePkt.dest = Packet::Broadcast;
basePkt.cmd = cmd;
basePkt.result = Unknown;
basePkt.req = NULL;
// baseReq.nicReq = true;
baseReq.setTime(curTick);
for (ChunkGenerator gen(addr, size, peerBlockSize());
!gen.done(); gen.next()) {
Packet *pkt = new Packet(basePkt);
Request *req = new Request(baseReq);
pkt->addr = gen.addr();
pkt->size = gen.size();
pkt->req = req;
pkt->req->setPaddr(pkt->addr);
pkt->req->setSize(pkt->size);
// Increment the data pointer on a write
if (data)
pkt->dataStatic(data + prevSize) ;
prevSize += pkt->size;
// Set the last bit of the dma as the final packet for this dma
// and set it's completion event.
if (prevSize == size) {
DmaReqState *state = new DmaReqState(event, true);
pkt->senderState = (void*)state;
}
assert(pendingCount >= 0);
pendingCount++;
sendDma(pkt);
}
// since this isn't getting used and we want a check to make sure that all
// packets had data in them at some point.
basePkt.dataStatic((uint8_t*)NULL);
}
void
DmaPort::sendDma(Packet *pkt)
{
// some kind of selction between access methods
// more work is going to have to be done to make
// switching actually work
/* MemState state = device->platform->system->memState;
if (state == Timing) {
if (sendTiming(pkt) == Failure)
transmitList.push_back(&packet);
} else if (state == Atomic) {*/
sendAtomic(pkt);
if (pkt->senderState) {
DmaReqState *state = (DmaReqState*)pkt->senderState;
state->completionEvent->schedule(curTick + (pkt->time - pkt->req->getTime()) +1);
}
pendingCount--;
assert(pendingCount >= 0);
delete pkt->req;
delete pkt;
/* } else if (state == Functional) {
sendFunctional(pkt);
// Is this correct???
completionEvent->schedule(pkt->req->responseTime - pkt->req->requestTime);
completionEvent == NULL;
} else
panic("Unknown memory command state.");
*/
}
DmaDevice::~DmaDevice()
{
if (dmaPort)
delete dmaPort;
}