diff options
Diffstat (limited to 'src/mem/cache/cache_impl.hh')
| -rw-r--r-- | src/mem/cache/cache_impl.hh | 54 |
1 files changed, 35 insertions, 19 deletions
diff --git a/src/mem/cache/cache_impl.hh b/src/mem/cache/cache_impl.hh index c3c1c0881..8c0521b52 100644 --- a/src/mem/cache/cache_impl.hh +++ b/src/mem/cache/cache_impl.hh @@ -163,10 +163,8 @@ Cache(const std::string &_name, prefetcher->setCache(this); prefetcher->setTags(tags); prefetcher->setBuffer(missQueue); -#if 0 - invalidatePkt = new Packet; - invalidatePkt->cmd = Packet::InvalidateReq; -#endif + invalidateReq = new Request((Addr) NULL, blkSize, 0); + invalidatePkt = new Packet(invalidateReq, Packet::InvalidateReq, 0); } template<class TagStore, class Buffering, class Coherence> @@ -267,6 +265,7 @@ template<class TagStore, class Buffering, class Coherence> Packet * Cache<TagStore,Buffering,Coherence>::getPacket() { + assert(missQueue->havePending()); Packet * pkt = missQueue->getPacket(); if (pkt) { if (!pkt->req->isUncacheable()) { @@ -287,13 +286,27 @@ template<class TagStore, class Buffering, class Coherence> void Cache<TagStore,Buffering,Coherence>::sendResult(PacketPtr &pkt, MSHR* mshr, bool success) { - if (success) { + if (success && !(pkt->flags & NACKED_LINE)) { missQueue->markInService(pkt, mshr); //Temp Hack for UPGRADES if (pkt->cmd == Packet::UpgradeReq) { - handleResponse(pkt); + pkt->flags &= ~CACHE_LINE_FILL; + BlkType *blk = tags->findBlock(pkt); + CacheBlk::State old_state = (blk) ? blk->status : 0; + CacheBlk::State new_state = coherence->getNewState(pkt,old_state); + DPRINTF(Cache, "Block for blk addr %x moving from state %i to %i\n", + pkt->getAddr() & (((ULL(1))<<48)-1), old_state, new_state); + //Set the state on the upgrade + memcpy(pkt->getPtr<uint8_t>(), blk->data, blkSize); + PacketList writebacks; + tags->handleFill(blk, mshr, new_state, writebacks, pkt); + assert(writebacks.empty()); + missQueue->handleResponse(pkt, curTick + hitLatency); } } else if (pkt && !pkt->req->isUncacheable()) { + pkt->flags &= ~NACKED_LINE; + pkt->flags &= ~SATISFIED; + pkt->flags &= ~SNOOP_COMMIT; missQueue->restoreOrigCmd(pkt); } } @@ -305,8 +318,9 @@ Cache<TagStore,Buffering,Coherence>::handleResponse(Packet * &pkt) BlkType *blk = NULL; if (pkt->senderState) { if (pkt->result == Packet::Nacked) { - pkt->reinitFromRequest(); - panic("Unimplemented NACK of packet\n"); + //pkt->reinitFromRequest(); + warn("NACKs from devices not connected to the same bus not implemented\n"); + return; } if (pkt->result == Packet::BadAddress) { //Make the response a Bad address and send it @@ -397,7 +411,9 @@ Cache<TagStore,Buffering,Coherence>::snoop(Packet * &pkt) assert(!(pkt->flags & SATISFIED)); pkt->flags |= SATISFIED; pkt->flags |= NACKED_LINE; - respondToSnoop(pkt, curTick + hitLatency); + ///@todo NACK's from other levels + //warn("NACKs from devices not connected to the same bus not implemented\n"); + //respondToSnoop(pkt, curTick + hitLatency); return; } else { @@ -410,7 +426,7 @@ Cache<TagStore,Buffering,Coherence>::snoop(Packet * &pkt) //@todo Make it so that a read to a pending read can't be exclusive now. //Set the address so find match works - panic("Don't have invalidates yet\n"); + //panic("Don't have invalidates yet\n"); invalidatePkt->addrOverride(pkt->getAddr()); //Append the invalidate on @@ -441,7 +457,7 @@ Cache<TagStore,Buffering,Coherence>::snoop(Packet * &pkt) pkt->flags |= SHARED_LINE; assert(pkt->isRead()); - Addr offset = pkt->getAddr() & ~(blkSize - 1); + Addr offset = pkt->getAddr() & (blkSize - 1); assert(offset < blkSize); assert(pkt->getSize() <= blkSize); assert(offset + pkt->getSize() <=blkSize); @@ -462,16 +478,16 @@ Cache<TagStore,Buffering,Coherence>::snoop(Packet * &pkt) CacheBlk::State new_state; bool satisfy = coherence->handleBusRequest(pkt,blk,mshr, new_state); if (satisfy) { - DPRINTF(Cache, "Cache snooped a %s request and now supplying data," + DPRINTF(Cache, "Cache snooped a %s request for addr %x and now supplying data," "new state is %i\n", - pkt->cmdString(), new_state); + pkt->cmdString(), blk_addr, new_state); tags->handleSnoop(blk, new_state, pkt); respondToSnoop(pkt, curTick + hitLatency); return; } - if (blk) DPRINTF(Cache, "Cache snooped a %s request, new state is %i\n", - pkt->cmdString(), new_state); + if (blk) DPRINTF(Cache, "Cache snooped a %s request for addr %x, new state is %i\n", + pkt->cmdString(), blk_addr, new_state); tags->handleSnoop(blk, new_state); } @@ -689,15 +705,15 @@ Cache<TagStore,Buffering,Coherence>::snoopProbe(PacketPtr &pkt) CacheBlk::State new_state = 0; bool satisfy = coherence->handleBusRequest(pkt,blk,mshr, new_state); if (satisfy) { - DPRINTF(Cache, "Cache snooped a %s request and now supplying data," + DPRINTF(Cache, "Cache snooped a %s request for addr %x and now supplying data," "new state is %i\n", - pkt->cmdString(), new_state); + pkt->cmdString(), blk_addr, new_state); tags->handleSnoop(blk, new_state, pkt); return hitLatency; } - if (blk) DPRINTF(Cache, "Cache snooped a %s request, new state is %i\n", - pkt->cmdString(), new_state); + if (blk) DPRINTF(Cache, "Cache snooped a %s request for addr %x, new state is %i\n", + pkt->cmdString(), blk_addr, new_state); tags->handleSnoop(blk, new_state); return 0; } |