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-rw-r--r--src/cpu/o3/commit_impl.hh12
-rw-r--r--src/cpu/o3/cpu.cc55
-rw-r--r--src/cpu/o3/cpu.hh19
-rw-r--r--src/cpu/o3/fetch_impl.hh5
-rw-r--r--src/cpu/o3/iew_impl.hh6
-rw-r--r--src/cpu/o3/lsq_unit.hh5
-rw-r--r--src/cpu/o3/lsq_unit_impl.hh24
-rwxr-xr-xsrc/cpu/o3/thread_context_impl.hh6
8 files changed, 96 insertions, 36 deletions
diff --git a/src/cpu/o3/commit_impl.hh b/src/cpu/o3/commit_impl.hh
index c80e4d8c1..ecf6ed632 100644
--- a/src/cpu/o3/commit_impl.hh
+++ b/src/cpu/o3/commit_impl.hh
@@ -342,12 +342,6 @@ DefaultCommit<Impl>::drain()
{
drainPending = true;
- // If it's already drained, return true.
- if (rob->isEmpty() && !iewStage->hasStoresToWB()) {
- cpu->signalDrained();
- return true;
- }
-
return false;
}
@@ -1218,16 +1212,16 @@ DefaultCommit<Impl>::skidInsert()
for (int inst_num = 0; inst_num < fromRename->size; ++inst_num) {
DynInstPtr inst = fromRename->insts[inst_num];
- int tid = inst->threadNumber;
if (!inst->isSquashed()) {
DPRINTF(Commit, "Inserting PC %#x [sn:%i] [tid:%i] into ",
- "skidBuffer.\n", inst->readPC(), inst->seqNum, tid);
+ "skidBuffer.\n", inst->readPC(), inst->seqNum,
+ inst->threadNumber);
skidBuffer.push(inst);
} else {
DPRINTF(Commit, "Instruction PC %#x [sn:%i] [tid:%i] was "
"squashed, skipping.\n",
- inst->readPC(), inst->seqNum, tid);
+ inst->readPC(), inst->seqNum, inst->threadNumber);
}
}
}
diff --git a/src/cpu/o3/cpu.cc b/src/cpu/o3/cpu.cc
index 7386dfadd..787ae2d14 100644
--- a/src/cpu/o3/cpu.cc
+++ b/src/cpu/o3/cpu.cc
@@ -88,7 +88,7 @@ FullO3CPU<Impl>::TickEvent::description()
template <class Impl>
FullO3CPU<Impl>::ActivateThreadEvent::ActivateThreadEvent()
- : Event(&mainEventQueue, CPU_Tick_Pri)
+ : Event(&mainEventQueue, CPU_Switch_Pri)
{
}
@@ -135,7 +135,8 @@ void
FullO3CPU<Impl>::DeallocateContextEvent::process()
{
cpu->deactivateThread(tid);
- cpu->removeThread(tid);
+ if (remove)
+ cpu->removeThread(tid);
}
template <class Impl>
@@ -191,7 +192,11 @@ FullO3CPU<Impl>::FullO3CPU(Params *params)
deferRegistration(params->deferRegistration),
numThreads(number_of_threads)
{
- _status = Idle;
+ if (!deferRegistration) {
+ _status = Running;
+ } else {
+ _status = Idle;
+ }
checker = NULL;
@@ -304,6 +309,9 @@ FullO3CPU<Impl>::FullO3CPU(Params *params)
tid,
bindRegs);
+
+ activateThreadEvent[tid].init(tid, this);
+ deallocateContextEvent[tid].init(tid, this);
}
rename.setRenameMap(renameMap);
@@ -449,7 +457,7 @@ FullO3CPU<Impl>::tick()
getState() == SimObject::Drained) {
// increment stat
lastRunningCycle = curTick;
- } else if (!activityRec.active()) {
+ } else if (!activityRec.active() || _status == Idle) {
lastRunningCycle = curTick;
timesIdled++;
} else {
@@ -548,7 +556,7 @@ FullO3CPU<Impl>::activateContext(int tid, int delay)
activateThread(tid);
}
- if(lastActivatedCycle < curTick) {
+ if (lastActivatedCycle < curTick) {
scheduleTickEvent(delay);
// Be sure to signal that there's some activity so the CPU doesn't
@@ -563,17 +571,20 @@ FullO3CPU<Impl>::activateContext(int tid, int delay)
}
template <class Impl>
-void
-FullO3CPU<Impl>::deallocateContext(int tid, int delay)
+bool
+FullO3CPU<Impl>::deallocateContext(int tid, bool remove, int delay)
{
// Schedule removal of thread data from CPU
if (delay){
DPRINTF(O3CPU, "[tid:%i]: Scheduling thread context to deallocate "
"on cycle %d\n", tid, curTick + cycles(delay));
- scheduleDeallocateContextEvent(tid, delay);
+ scheduleDeallocateContextEvent(tid, remove, delay);
+ return false;
} else {
deactivateThread(tid);
- removeThread(tid);
+ if (remove)
+ removeThread(tid);
+ return true;
}
}
@@ -582,8 +593,9 @@ void
FullO3CPU<Impl>::suspendContext(int tid)
{
DPRINTF(O3CPU,"[tid: %i]: Suspending Thread Context.\n", tid);
- deactivateThread(tid);
- if (activeThreads.size() == 0)
+ bool deallocated = deallocateContext(tid, false, 1);
+ // If this was the last thread then unschedule the tick event.
+ if ((activeThreads.size() == 1 && !deallocated) || activeThreads.size() == 0)
unscheduleTickEvent();
_status = Idle;
}
@@ -594,7 +606,7 @@ FullO3CPU<Impl>::haltContext(int tid)
{
//For now, this is the same as deallocate
DPRINTF(O3CPU,"[tid:%i]: Halt Context called. Deallocating", tid);
- deallocateContext(tid, 1);
+ deallocateContext(tid, true, 1);
}
template <class Impl>
@@ -935,6 +947,25 @@ FullO3CPU<Impl>::takeOverFrom(BaseCPU *oldCPU)
}
if (!tickEvent.scheduled())
tickEvent.schedule(curTick);
+
+ Port *peer;
+ Port *icachePort = fetch.getIcachePort();
+ if (icachePort->getPeer() == NULL) {
+ peer = oldCPU->getPort("icachePort")->getPeer();
+ icachePort->setPeer(peer);
+ } else {
+ peer = icachePort->getPeer();
+ }
+ peer->setPeer(icachePort);
+
+ Port *dcachePort = iew.getDcachePort();
+ if (dcachePort->getPeer() == NULL) {
+ Port *peer = oldCPU->getPort("dcachePort")->getPeer();
+ dcachePort->setPeer(peer);
+ } else {
+ peer = dcachePort->getPeer();
+ }
+ peer->setPeer(dcachePort);
}
template <class Impl>
diff --git a/src/cpu/o3/cpu.hh b/src/cpu/o3/cpu.hh
index dcdcd1fe6..fe510519c 100644
--- a/src/cpu/o3/cpu.hh
+++ b/src/cpu/o3/cpu.hh
@@ -202,9 +202,12 @@ class FullO3CPU : public BaseO3CPU
class DeallocateContextEvent : public Event
{
private:
- /** Number of Thread to Activate */
+ /** Number of Thread to deactivate */
int tid;
+ /** Should the thread be removed from the CPU? */
+ bool remove;
+
/** Pointer to the CPU. */
FullO3CPU<Impl> *cpu;
@@ -218,12 +221,15 @@ class FullO3CPU : public BaseO3CPU
/** Processes the event, calling activateThread() on the CPU. */
void process();
+ /** Sets whether the thread should also be removed from the CPU. */
+ void setRemove(bool _remove) { remove = _remove; }
+
/** Returns the description of the event. */
const char *description();
};
/** Schedule cpu to deallocate thread context.*/
- void scheduleDeallocateContextEvent(int tid, int delay)
+ void scheduleDeallocateContextEvent(int tid, bool remove, int delay)
{
// Schedule thread to activate, regardless of its current state.
if (deallocateContextEvent[tid].squashed())
@@ -296,9 +302,9 @@ class FullO3CPU : public BaseO3CPU
void suspendContext(int tid);
/** Remove Thread from Active Threads List &&
- * Remove Thread Context from CPU.
+ * Possibly Remove Thread Context from CPU.
*/
- void deallocateContext(int tid, int delay = 1);
+ bool deallocateContext(int tid, bool remove, int delay = 1);
/** Remove Thread from Active Threads List &&
* Remove Thread Context from CPU.
@@ -626,11 +632,6 @@ class FullO3CPU : public BaseO3CPU
/** Pointers to all of the threads in the CPU. */
std::vector<Thread *> thread;
- /** Pointer to the icache interface. */
- MemInterface *icacheInterface;
- /** Pointer to the dcache interface. */
- MemInterface *dcacheInterface;
-
/** Whether or not the CPU should defer its registration. */
bool deferRegistration;
diff --git a/src/cpu/o3/fetch_impl.hh b/src/cpu/o3/fetch_impl.hh
index 2d447bfe5..a01784f8f 100644
--- a/src/cpu/o3/fetch_impl.hh
+++ b/src/cpu/o3/fetch_impl.hh
@@ -623,6 +623,11 @@ DefaultFetch<Impl>::fetchCacheLine(Addr fetch_PC, Fault &ret_fault, unsigned tid
// Now do the timing access to see whether or not the instruction
// exists within the cache.
if (!icachePort->sendTiming(data_pkt)) {
+ if (data_pkt->result == Packet::BadAddress) {
+ fault = TheISA::genMachineCheckFault();
+ delete mem_req;
+ memReq[tid] = NULL;
+ }
assert(retryPkt == NULL);
assert(retryTid == -1);
DPRINTF(Fetch, "[tid:%i] Out of MSHRs!\n", tid);
diff --git a/src/cpu/o3/iew_impl.hh b/src/cpu/o3/iew_impl.hh
index b2baae296..ba5260fe2 100644
--- a/src/cpu/o3/iew_impl.hh
+++ b/src/cpu/o3/iew_impl.hh
@@ -600,6 +600,11 @@ template<class Impl>
void
DefaultIEW<Impl>::instToCommit(DynInstPtr &inst)
{
+ // This function should not be called after writebackInsts in a
+ // single cycle. That will cause problems with an instruction
+ // being added to the queue to commit without being processed by
+ // writebackInsts prior to being sent to commit.
+
// First check the time slot that this instruction will write
// to. If there are free write ports at the time, then go ahead
// and write the instruction to that time. If there are not,
@@ -1286,6 +1291,7 @@ DefaultIEW<Impl>::executeInsts()
} else if (fault != NoFault) {
// If the instruction faulted, then we need to send it along to commit
// without the instruction completing.
+ DPRINTF(IEW, "Store has fault! [sn:%lli]\n", inst->seqNum);
// Send this instruction to commit, also make sure iew stage
// realizes there is activity.
diff --git a/src/cpu/o3/lsq_unit.hh b/src/cpu/o3/lsq_unit.hh
index 90d1a3d53..512124bb4 100644
--- a/src/cpu/o3/lsq_unit.hh
+++ b/src/cpu/o3/lsq_unit.hh
@@ -638,6 +638,11 @@ LSQUnit<Impl>::read(Request *req, T &data, int load_idx)
// if we the cache is not blocked, do cache access
if (!lsq->cacheBlocked()) {
if (!dcachePort->sendTiming(data_pkt)) {
+ if (data_pkt->result == Packet::BadAddress) {
+ delete data_pkt;
+ return TheISA::genMachineCheckFault();
+ }
+
// If the access didn't succeed, tell the LSQ by setting
// the retry thread id.
lsq->setRetryTid(lsqID);
diff --git a/src/cpu/o3/lsq_unit_impl.hh b/src/cpu/o3/lsq_unit_impl.hh
index 98bea74fb..dc1a99d87 100644
--- a/src/cpu/o3/lsq_unit_impl.hh
+++ b/src/cpu/o3/lsq_unit_impl.hh
@@ -608,9 +608,9 @@ LSQUnit<Impl>::writebackStores()
DPRINTF(LSQUnit, "D-Cache: Writing back store idx:%i PC:%#x "
"to Addr:%#x, data:%#x [sn:%lli]\n",
- storeWBIdx, storeQueue[storeWBIdx].inst->readPC(),
+ storeWBIdx, inst->readPC(),
req->getPaddr(), *(inst->memData),
- storeQueue[storeWBIdx].inst->seqNum);
+ inst->seqNum);
// @todo: Remove this SC hack once the memory system handles it.
if (req->getFlags() & LOCKED) {
@@ -619,10 +619,19 @@ LSQUnit<Impl>::writebackStores()
} else {
if (cpu->lockFlag) {
req->setScResult(1);
+ DPRINTF(LSQUnit, "Store conditional [sn:%lli] succeeded.",
+ inst->seqNum);
} else {
req->setScResult(0);
// Hack: Instantly complete this store.
- completeDataAccess(data_pkt);
+// completeDataAccess(data_pkt);
+ DPRINTF(LSQUnit, "Store conditional [sn:%lli] failed. "
+ "Instantly completing it.\n",
+ inst->seqNum);
+ WritebackEvent *wb = new WritebackEvent(inst, data_pkt, this);
+ wb->schedule(curTick + 1);
+ delete state;
+ completeStore(storeWBIdx);
incrStIdx(storeWBIdx);
continue;
}
@@ -633,7 +642,13 @@ LSQUnit<Impl>::writebackStores()
}
if (!dcachePort->sendTiming(data_pkt)) {
+ if (data_pkt->result == Packet::BadAddress) {
+ panic("LSQ sent out a bad address for a completed store!");
+ }
// Need to handle becoming blocked on a store.
+ DPRINTF(IEW, "D-Cache became blcoked when writing [sn:%lli], will"
+ "retry later\n",
+ inst->seqNum);
isStoreBlocked = true;
++lsqCacheBlocked;
assert(retryPkt == NULL);
@@ -880,6 +895,9 @@ LSQUnit<Impl>::recvRetry()
assert(retryPkt != NULL);
if (dcachePort->sendTiming(retryPkt)) {
+ if (retryPkt->result == Packet::BadAddress) {
+ panic("LSQ sent out a bad address for a completed store!");
+ }
storePostSend(retryPkt);
retryPkt = NULL;
isStoreBlocked = false;
diff --git a/src/cpu/o3/thread_context_impl.hh b/src/cpu/o3/thread_context_impl.hh
index 25e1db21c..2bc194d53 100755
--- a/src/cpu/o3/thread_context_impl.hh
+++ b/src/cpu/o3/thread_context_impl.hh
@@ -165,14 +165,14 @@ template <class Impl>
void
O3ThreadContext<Impl>::deallocate(int delay)
{
- DPRINTF(O3CPU, "Calling deallocate on Thread Context %d\n",
- getThreadNum());
+ DPRINTF(O3CPU, "Calling deallocate on Thread Context %d delay %d\n",
+ getThreadNum(), delay);
if (thread->status() == ThreadContext::Unallocated)
return;
thread->setStatus(ThreadContext::Unallocated);
- cpu->deallocateContext(thread->readTid(), delay);
+ cpu->deallocateContext(thread->readTid(), true, delay);
}
template <class Impl>
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 11:27:23 +0000