/*
+ * Copyright (c) 2012 ARM Limited
+ * All rights reserved.
+ *
+ * The license below extends only to copyright in the software and shall
+ * not be construed as granting a license to any other intellectual
+ * property including but not limited to intellectual property relating
+ * to a hardware implementation of the functionality of the software
+ * licensed hereunder. You may use the software subject to the license
+ * terms below provided that you ensure that this notice is replicated
+ * unmodified and in its entirety in all distributions of the software,
+ * modified or unmodified, in source code or in binary form.
+ *
* Copyright (c) 2006 The Regents of The University of Michigan
* All rights reserved.
*
*/
#include "base/trace.hh"
+#include "debug/BusAddrRanges.hh"
#include "dev/io_device.hh"
-#include "sim/builder.hh"
#include "sim/system.hh"
-
-PioPort::PioPort(PioDevice *dev, System *s, std::string pname)
- : SimpleTimingPort(dev->name() + pname), device(dev), sys(s)
-{ }
-
-
-Tick
-PioPort::recvAtomic(Packet *pkt)
+PioPort::PioPort(PioDevice *dev)
+ : SimpleTimingPort(dev->name() + "-pio", dev), device(dev)
{
- return device->recvAtomic(pkt);
}
-void
-PioPort::recvFunctional(Packet *pkt)
+Tick
+PioPort::recvAtomic(PacketPtr pkt)
{
- device->recvAtomic(pkt);
+ return pkt->isRead() ? device->read(pkt) : device->write(pkt);
}
-void
-PioPort::getDeviceAddressRanges(AddrRangeList &resp, AddrRangeList &snoop)
+AddrRangeList
+PioPort::getAddrRanges() const
{
- snoop.clear();
- device->addressRanges(resp);
+ return device->getAddrRanges();
}
-
-bool
-PioPort::recvTiming(Packet *pkt)
-{
- if (pkt->result == Packet::Nacked) {
- resendNacked(pkt);
- } else {
- Tick latency = device->recvAtomic(pkt);
- // turn packet around to go back to requester
- pkt->makeTimingResponse();
- sendTiming(pkt, latency);
- }
- return true;
-}
+PioDevice::PioDevice(const Params *p)
+ : MemObject(p), sys(p->system), pioPort(this)
+{}
PioDevice::~PioDevice()
{
- if (pioPort)
- delete pioPort;
}
void
PioDevice::init()
{
- if (!pioPort)
- panic("Pio port not connected to anything!");
- pioPort->sendStatusChange(Port::RangeChange);
-}
-
-
-unsigned int
-PioDevice::drain(Event *de)
-{
- unsigned int count;
- count = pioPort->drain(de);
- if (count)
- changeState(Draining);
- else
- changeState(Drained);
- return count;
+ if (!pioPort.isConnected())
+ panic("Pio port of %s not connected to anything!", name());
+ pioPort.sendRangeChange();
}
-void
-BasicPioDevice::addressRanges(AddrRangeList &range_list)
+SlavePort &
+PioDevice::getSlavePort(const std::string &if_name, int idx)
{
- assert(pioSize != 0);
- range_list.clear();
- range_list.push_back(RangeSize(pioAddr, pioSize));
-}
-
-
-DmaPort::DmaPort(DmaDevice *dev, System *s)
- : Port(dev->name() + "-dmaport"), device(dev), sys(s), pendingCount(0),
- actionInProgress(0), drainEvent(NULL)
-{ }
-
-bool
-DmaPort::recvTiming(Packet *pkt)
-{
-
-
- if (pkt->result == Packet::Nacked) {
- DPRINTF(DMA, "Received nacked Pkt %#x with State: %#x Addr: %#x\n",
- pkt, pkt->senderState, pkt->getAddr());
- pkt->reinitNacked();
- sendDma(pkt, true);
- } else if (pkt->senderState) {
- DmaReqState *state;
- DPRINTF(DMA, "Received response Pkt %#x with State: %#x Addr: %#x\n",
- pkt, pkt->senderState, pkt->getAddr());
- state = dynamic_cast<DmaReqState*>(pkt->senderState);
- pendingCount--;
-
- assert(pendingCount >= 0);
- assert(state);
-
- state->numBytes += pkt->req->getSize();
- if (state->totBytes == state->numBytes) {
- state->completionEvent->process();
- delete state;
- }
- delete pkt->req;
- delete pkt;
-
- if (pendingCount == 0 && drainEvent) {
- drainEvent->process();
- drainEvent = NULL;
- }
- } else {
- panic("Got packet without sender state... huh?\n");
+ if (if_name == "pio") {
+ return pioPort;
}
-
- return true;
+ return MemObject::getSlavePort(if_name, idx);
}
-DmaDevice::DmaDevice(Params *p)
- : PioDevice(p), dmaPort(NULL)
-{ }
-
-
unsigned int
-DmaDevice::drain(Event *de)
+PioDevice::drain(Event *de)
{
unsigned int count;
- count = pioPort->drain(de) + dmaPort->drain(de);
+ count = pioPort.drain(de);
if (count)
changeState(Draining);
else
return count;
}
-unsigned int
-DmaPort::drain(Event *de)
-{
- if (pendingCount == 0)
- return 0;
- drainEvent = de;
- return 1;
-}
-
-
-void
-DmaPort::recvRetry()
-{
- Packet* pkt = transmitList.front();
- bool result = true;
- while (result && transmitList.size()) {
- DPRINTF(DMA, "Retry on Packet %#x with senderState: %#x\n",
- pkt, pkt->senderState);
- result = sendTiming(pkt);
- if (result) {
- DPRINTF(DMA, "-- Done\n");
- transmitList.pop_front();
- } else {
- DPRINTF(DMA, "-- Failed, queued\n");
- }
- }
-}
-
-
-void
-DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event,
- uint8_t *data)
-{
- assert(event);
-
- assert(device->getState() == SimObject::Running);
-
- DmaReqState *reqState = new DmaReqState(event, this, size);
-
- for (ChunkGenerator gen(addr, size, peerBlockSize());
- !gen.done(); gen.next()) {
- Request *req = new Request(gen.addr(), gen.size(), 0);
- Packet *pkt = new Packet(req, cmd, Packet::Broadcast);
-
- // Increment the data pointer on a write
- if (data)
- pkt->dataStatic(data + gen.complete());
-
- pkt->senderState = reqState;
-
- assert(pendingCount >= 0);
- pendingCount++;
- sendDma(pkt);
- }
-
-}
-
+BasicPioDevice::BasicPioDevice(const Params *p)
+ : PioDevice(p), pioAddr(p->pio_addr), pioSize(0),
+ pioDelay(p->pio_latency)
+{}
-void
-DmaPort::sendDma(Packet *pkt, bool front)
+AddrRangeList
+BasicPioDevice::getAddrRanges() const
{
- // some kind of selction between access methods
- // more work is going to have to be done to make
- // switching actually work
-
- System::MemoryMode state = sys->getMemoryMode();
- if (state == System::Timing) {
- DPRINTF(DMA, "Attempting to send Packet %#x with addr: %#x\n",
- pkt, pkt->getAddr());
- if (transmitList.size() || !sendTiming(pkt)) {
- if (front)
- transmitList.push_front(pkt);
- else
- transmitList.push_back(pkt);
- DPRINTF(DMA, "-- Failed: queued\n");
- } else {
- DPRINTF(DMA, "-- Done\n");
- }
- } else if (state == System::Atomic) {
- Tick lat;
- lat = sendAtomic(pkt);
- assert(pkt->senderState);
- DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState);
- assert(state);
-
- state->numBytes += pkt->req->getSize();
- if (state->totBytes == state->numBytes) {
- state->completionEvent->schedule(curTick + lat);
- delete state;
- delete pkt->req;
- }
- pendingCount--;
- assert(pendingCount >= 0);
- delete pkt;
-
- if (pendingCount == 0 && drainEvent) {
- drainEvent->process();
- drainEvent = NULL;
- }
-
- } else
- panic("Unknown memory command state.");
-}
-
-DmaDevice::~DmaDevice()
-{
- if (dmaPort)
- delete dmaPort;
+ assert(pioSize != 0);
+ AddrRangeList ranges;
+ DPRINTF(BusAddrRanges, "registering range: %#x-%#x\n", pioAddr, pioSize);
+ ranges.push_back(RangeSize(pioAddr, pioSize));
+ return ranges;
}
-
-
projects / gem5.git / blobdiff