diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/cpu/o3/cpu.cc | 6 | ||||
| -rw-r--r-- | src/cpu/simple/atomic.cc | 3 | ||||
| -rw-r--r-- | src/mem/bus.cc | 9 |
3 files changed, 17 insertions, 1 deletions
diff --git a/src/cpu/o3/cpu.cc b/src/cpu/o3/cpu.cc index dfe42d882..580816372 100644 --- a/src/cpu/o3/cpu.cc +++ b/src/cpu/o3/cpu.cc @@ -819,6 +819,12 @@ unsigned int FullO3CPU<Impl>::drain(Event *drain_event) { DPRINTF(O3CPU, "Switching out\n"); + + // If the CPU isn't doing anything, then return immediately. + if (_status == Idle || _status == SwitchedOut) { + return 0; + } + drainCount = 0; fetch.drain(); decode.drain(); diff --git a/src/cpu/simple/atomic.cc b/src/cpu/simple/atomic.cc index 4f68cfd6f..f94ea0917 100644 --- a/src/cpu/simple/atomic.cc +++ b/src/cpu/simple/atomic.cc @@ -213,6 +213,9 @@ AtomicSimpleCPU::takeOverFrom(BaseCPU *oldCPU) break; } } + if (_status != Running) { + _status = Idle; + } } diff --git a/src/mem/bus.cc b/src/mem/bus.cc index 7b65d252b..8ea67a0e4 100644 --- a/src/mem/bus.cc +++ b/src/mem/bus.cc @@ -242,8 +242,11 @@ Bus::recvRetry(int id) } } //If we weren't able to drain before, we might be able to now. - if (drainEvent && retryList.size() == 0 && curTick >= tickNextIdle) + if (drainEvent && retryList.size() == 0 && curTick >= tickNextIdle) { drainEvent->process(); + // Clear the drain event once we're done with it. + drainEvent = NULL; + } } Port * @@ -367,6 +370,10 @@ Bus::recvAtomic(PacketPtr pkt) DPRINTF(Bus, "recvAtomic: packet src %d dest %d addr 0x%x cmd %s\n", pkt->getSrc(), pkt->getDest(), pkt->getAddr(), pkt->cmdString()); assert(pkt->getDest() == Packet::Broadcast); + + // Assume one bus cycle in order to get through. This may have + // some clock skew issues yet again... + pkt->finishTime = curTick + clock; Tick snoopTime = atomicSnoop(pkt); if (snoopTime) return snoopTime; //Snoop satisfies it |