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add uglyiness to fix dmas

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src/dev/io_device.cc:
    extra printing and assertions
src/mem/bridge.hh:
    deal with packets only satisfying part of a request by making many requests
src/mem/cache/cache_impl.hh:
    make the cache try to satisfy a functional request from the cache above it before checking itself

--HG--
extra : convert_revision : 1df52ab61d7967e14cc377c560495430a6af266a
This commit is contained in:
Ali Saidi
2007-05-14 16:14:59 -04:00
parent af26532bbd
commit ea4e6f2e3d
3 changed files with 31 additions and 11 deletions
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16
src/dev/io_device.cc
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@@ -218,6 +218,9 @@ DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event,
DmaReqState *reqState = new DmaReqState(event, this, size);
DPRINTF(DMA, "Starting DMA for addr: %#x size: %d sched: %d\n", addr, size,
event->scheduled());
for (ChunkGenerator gen(addr, size, peerBlockSize());
!gen.done(); gen.next()) {
Request *req = new Request(gen.addr(), gen.size(), 0);
@@ -231,6 +234,8 @@ DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event,
assert(pendingCount >= 0);
pendingCount++;
DPRINTF(DMA, "--Queuing DMA for addr: %#x size: %d\n", gen.addr(),
gen.size());
queueDma(pkt);
}
@@ -281,19 +286,28 @@ DmaPort::sendDma()
if (transmitList.size() && backoffTime && !inRetry &&
!backoffEvent.scheduled()) {
DPRINTF(DMA, "-- Scheduling backoff timer for %d\n",
backoffTime+curTick);
backoffEvent.schedule(backoffTime+curTick);
}
} else if (state == System::Atomic) {
transmitList.pop_front();
Tick lat;
DPRINTF(DMA, "--Sending DMA for addr: %#x size: %d\n",
pkt->req->getPaddr(), pkt->req->getSize());
lat = sendAtomic(pkt);
assert(pkt->senderState);
DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState);
assert(state);
state->numBytes += pkt->req->getSize();
DPRINTF(DMA, "--Received response for DMA for addr: %#x size: %d nb: %d, tot: %d sched %d\n",
pkt->req->getPaddr(), pkt->req->getSize(), state->numBytes,
state->totBytes, state->completionEvent->scheduled());
if (state->totBytes == state->numBytes) {
assert(!state->completionEvent->scheduled());
state->completionEvent->schedule(curTick + lat);
delete state;
delete pkt->req;