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-rw-r--r--src/mem/cache/cache_impl.hh119
1 files changed, 73 insertions, 46 deletions
diff --git a/src/mem/cache/cache_impl.hh b/src/mem/cache/cache_impl.hh
index 9504d16c6..520e5abb5 100644
--- a/src/mem/cache/cache_impl.hh
+++ b/src/mem/cache/cache_impl.hh
@@ -197,7 +197,8 @@ Cache<TagStore,Buffering,Coherence>::access(PacketPtr &pkt)
/** @todo make the fast write alloc (wh64) work with coherence. */
/** @todo Do we want to do fast writes for writebacks as well? */
if (!blk && pkt->getSize() >= blkSize && coherence->allowFastWrites() &&
- (pkt->cmd == Packet::WriteReq || pkt->cmd == Packet::WriteInvalidateReq) ) {
+ (pkt->cmd == Packet::WriteReq
+ || pkt->cmd == Packet::WriteInvalidateReq) ) {
// not outstanding misses, can do this
MSHR* outstanding_miss = missQueue->findMSHR(pkt->getAddr());
if (pkt->cmd == Packet::WriteInvalidateReq || !outstanding_miss) {
@@ -254,7 +255,8 @@ Cache<TagStore,Buffering,Coherence>::getPacket()
Packet * pkt = missQueue->getPacket();
if (pkt) {
if (!pkt->req->isUncacheable()) {
- if (pkt->cmd == Packet::HardPFReq) misses[Packet::HardPFReq][0/*pkt->req->getThreadNum()*/]++;
+ if (pkt->cmd == Packet::HardPFReq)
+ misses[Packet::HardPFReq][0/*pkt->req->getThreadNum()*/]++;
BlkType *blk = tags->findBlock(pkt);
Packet::Command cmd = coherence->getBusCmd(pkt->cmd,
(blk)? blk->status : 0);
@@ -269,10 +271,12 @@ Cache<TagStore,Buffering,Coherence>::getPacket()
template<class TagStore, class Buffering, class Coherence>
void
-Cache<TagStore,Buffering,Coherence>::sendResult(PacketPtr &pkt, MSHR* mshr, bool success)
+Cache<TagStore,Buffering,Coherence>::sendResult(PacketPtr &pkt, MSHR* mshr,
+ bool success)
{
if (success && !(pkt && (pkt->flags & NACKED_LINE))) {
- if (!mshr->pkt->needsResponse() && !(mshr->pkt->cmd == Packet::UpgradeReq)
+ if (!mshr->pkt->needsResponse()
+ && !(mshr->pkt->cmd == Packet::UpgradeReq)
&& (pkt && (pkt->flags & SATISFIED))) {
//Writeback, clean up the non copy version of the packet
delete pkt;
@@ -286,8 +290,10 @@ Cache<TagStore,Buffering,Coherence>::sendResult(PacketPtr &pkt, MSHR* mshr, bool
CacheBlk::State old_state = (blk) ? blk->status : 0;
CacheBlk::State new_state = coherence->getNewState(pkt,old_state);
if (old_state != new_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);
+ 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;
@@ -319,7 +325,8 @@ Cache<TagStore,Buffering,Coherence>::handleResponse(Packet * &pkt)
((MSHR*)pkt->senderState)->pkt = pkt;
if (pkt->result == Packet::Nacked) {
//pkt->reinitFromRequest();
- warn("NACKs from devices not connected to the same bus not implemented\n");
+ warn("NACKs from devices not connected to the same bus "
+ "not implemented\n");
return;
}
if (pkt->result == Packet::BadAddress) {
@@ -335,8 +342,10 @@ Cache<TagStore,Buffering,Coherence>::handleResponse(Packet * &pkt)
PacketList writebacks;
CacheBlk::State new_state = coherence->getNewState(pkt,old_state);
if (old_state != new_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);
+ DPRINTF(Cache, "Block for blk addr %x moving from "
+ "state %i to %i\n",
+ pkt->getAddr() & (((ULL(1))<<48)-1),
+ old_state, new_state);
blk = tags->handleFill(blk, (MSHR*)pkt->senderState,
new_state, writebacks, pkt);
while (!writebacks.empty()) {
@@ -378,30 +387,36 @@ Cache<TagStore,Buffering,Coherence>::snoop(Packet * &pkt)
BlkType *blk = tags->findBlock(pkt);
MSHR *mshr = missQueue->findMSHR(blk_addr);
if (coherence->hasProtocol()) { //@todo Move this into handle bus req
- //If we find an mshr, and it is in service, we need to NACK or invalidate
+ //If we find an mshr, and it is in service, we need to NACK or
+ //invalidate
if (mshr) {
if (mshr->inService) {
if ((mshr->pkt->isInvalidate() || !mshr->pkt->isCacheFill())
- && (pkt->cmd != Packet::InvalidateReq && pkt->cmd != Packet::WriteInvalidateReq)) {
- //If the outstanding request was an invalidate (upgrade,readex,..)
- //Then we need to ACK the request until we get the data
- //Also NACK if the outstanding request is not a cachefill (writeback)
+ && (pkt->cmd != Packet::InvalidateReq
+ && pkt->cmd != Packet::WriteInvalidateReq)) {
+ //If the outstanding request was an invalidate
+ //(upgrade,readex,..) Then we need to ACK the request
+ //until we get the data Also NACK if the outstanding
+ //request is not a cachefill (writeback)
assert(!(pkt->flags & SATISFIED));
pkt->flags |= SATISFIED;
pkt->flags |= NACKED_LINE;
///@todo NACK's from other levels
- //warn("NACKs from devices not connected to the same bus not implemented\n");
+ //warn("NACKs from devices not connected to the same bus "
+ //"not implemented\n");
//respondToSnoop(pkt, curTick + hitLatency);
return;
}
else {
- //The supplier will be someone else, because we are waiting for
- //the data. This should cause this cache to be forced to go to
- //the shared state, not the exclusive even though the shared line
- //won't be asserted. But for now we will just invlidate ourselves
- //and allow the other cache to go into the exclusive state.
- //@todo Make it so a read to a pending read doesn't invalidate.
- //@todo Make it so that a read to a pending read can't be exclusive now.
+ //The supplier will be someone else, because we are
+ //waiting for the data. This should cause this cache to
+ //be forced to go to the shared state, not the exclusive
+ //even though the shared line won't be asserted. But for
+ //now we will just invlidate ourselves and allow the other
+ //cache to go into the exclusive state. @todo Make it so
+ //a read to a pending read doesn't invalidate. @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");
@@ -409,7 +424,8 @@ Cache<TagStore,Buffering,Coherence>::snoop(Packet * &pkt)
//Append the invalidate on
missQueue->addTarget(mshr,invalidatePkt);
- DPRINTF(Cache, "Appending Invalidate to blk_addr: %x\n", pkt->getAddr() & (((ULL(1))<<48)-1));
+ DPRINTF(Cache, "Appending Invalidate to blk_addr: %x\n",
+ pkt->getAddr() & (((ULL(1))<<48)-1));
return;
}
}
@@ -417,7 +433,8 @@ Cache<TagStore,Buffering,Coherence>::snoop(Packet * &pkt)
//We also need to check the writeback buffers and handle those
std::vector<MSHR *> writebacks;
if (missQueue->findWrites(blk_addr, writebacks)) {
- DPRINTF(Cache, "Snoop hit in writeback to blk_addr: %x\n", pkt->getAddr() & (((ULL(1))<<48)-1));
+ DPRINTF(Cache, "Snoop hit in writeback to blk_addr: %x\n",
+ pkt->getAddr() & (((ULL(1))<<48)-1));
//Look through writebacks for any non-uncachable writes, use that
for (int i=0; i<writebacks.size(); i++) {
@@ -445,7 +462,8 @@ Cache<TagStore,Buffering,Coherence>::snoop(Packet * &pkt)
}
if (pkt->isInvalidate()) {
- //This must be an upgrade or other cache will take ownership
+ //This must be an upgrade or other cache will take
+ //ownership
missQueue->markInService(mshr->pkt, mshr);
}
return;
@@ -456,16 +474,17 @@ 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 for addr %x and now supplying data,"
- "new state is %i\n",
+ DPRINTF(Cache, "Cache snooped a %s request for addr %x and "
+ "now supplying data, new state is %i\n",
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 for addr %x, new state is %i\n",
- pkt->cmdString(), blk_addr, 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);
}
@@ -478,12 +497,13 @@ Cache<TagStore,Buffering,Coherence>::snoopResponse(Packet * &pkt)
//Need to mark it as not in service, and retry for bus
assert(0); //Yeah, we saw a NACK come through
- //For now this should never get called, we return false when we see a NACK
- //instead, by doing this we allow the bus_blocked mechanism to handle the retry
- //For now it retrys in just 2 cycles, need to figure out how to change that
- //Eventually we will want to also have success come in as a parameter
- //Need to make sure that we handle the functionality that happens on successufl
- //return of the sendAddr function
+ //For now this should never get called, we return false when we see a
+ //NACK instead, by doing this we allow the bus_blocked mechanism to
+ //handle the retry For now it retrys in just 2 cycles, need to figure
+ //out how to change that Eventually we will want to also have success
+ //come in as a parameter Need to make sure that we handle the
+ //functionality that happens on successufl return of the sendAddr
+ //function
}
}
@@ -500,7 +520,8 @@ Cache<TagStore,Buffering,Coherence>::invalidateBlk(Addr addr)
*/
template<class TagStore, class Buffering, class Coherence>
Tick
-Cache<TagStore,Buffering,Coherence>::probe(Packet * &pkt, bool update, CachePort* otherSidePort)
+Cache<TagStore,Buffering,Coherence>::probe(Packet * &pkt, bool update,
+ CachePort* otherSidePort)
{
// MemDebug::cacheProbe(pkt);
if (!pkt->req->isUncacheable()) {
@@ -649,13 +670,17 @@ Cache<TagStore,Buffering,Coherence>::probe(Packet * &pkt, bool update, CachePort
*/ misses[pkt->cmdToIndex()][0/*pkt->req->getThreadNum()*/]++;
CacheBlk::State old_state = (blk) ? blk->status : 0;
- CacheBlk::State new_state = coherence->getNewState(busPkt, old_state);
- DPRINTF(Cache, "Receive response:%s for blk addr %x in state %i\n",
- busPkt->cmdString(),
- busPkt->getAddr() & (((ULL(1))<<48)-1), old_state);
+ CacheBlk::State new_state =
+ coherence->getNewState(busPkt, old_state);
+ DPRINTF(Cache,
+ "Receive response:%s for blk addr %x in state %i\n",
+ busPkt->cmdString(),
+ busPkt->getAddr() & (((ULL(1))<<48)-1), old_state);
if (old_state != new_state)
- DPRINTF(Cache, "Block for blk addr %x moving from state %i to %i\n",
- busPkt->getAddr() & (((ULL(1))<<48)-1), old_state, new_state);
+ DPRINTF(Cache, "Block for blk addr %x moving from "
+ "state %i to %i\n",
+ busPkt->getAddr() & (((ULL(1))<<48)-1),
+ old_state, new_state);
tags->handleFill(blk, busPkt,
new_state,
@@ -705,15 +730,17 @@ 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 for addr %x and now supplying data,"
- "new state is %i\n",
+ DPRINTF(Cache, "Cache snooped a %s request for addr %x and "
+ "now supplying data, new state is %i\n",
pkt->cmdString(), blk_addr, new_state);
tags->handleSnoop(blk, new_state, pkt);
return hitLatency;
}
- if (blk) DPRINTF(Cache, "Cache snooped a %s request for addr %x, new state is %i\n",
- pkt->cmdString(), blk_addr, 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;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 06:47:22 +0000