summaryrefslogtreecommitdiff
path: root/src/cpu/o3
diff options
context:
space:
mode:
Diffstat (limited to 'src/cpu/o3')
-rw-r--r--src/cpu/o3/comm.hh10
-rw-r--r--src/cpu/o3/commit_impl.hh10
-rw-r--r--src/cpu/o3/iew_impl.hh11
-rw-r--r--src/cpu/o3/lsq_unit.hh16
-rw-r--r--src/cpu/o3/lsq_unit_impl.hh12
5 files changed, 31 insertions, 28 deletions
diff --git a/src/cpu/o3/comm.hh b/src/cpu/o3/comm.hh
index a425484f5..4da251104 100644
--- a/src/cpu/o3/comm.hh
+++ b/src/cpu/o3/comm.hh
@@ -185,8 +185,9 @@ struct TimeBufStruct {
/// Instruction that caused the a non-mispredict squash
DynInstPtr squashInst; // *F
- /// Hack for now to send back an uncached access to the IEW stage.
- DynInstPtr uncachedLoad; // *I
+ /// Hack for now to send back a strictly ordered access to the
+ /// IEW stage.
+ DynInstPtr strictlyOrderedLoad; // *I
/// Communication specifically to the IQ to tell the IQ that it can
/// schedule a non-speculative instruction.
@@ -216,8 +217,9 @@ struct TimeBufStruct {
/// If the interrupt ended up being cleared before being handled
bool clearInterrupt; // *F
- /// Hack for now to send back an uncached access to the IEW stage.
- bool uncached; // *I
+ /// Hack for now to send back an strictly ordered access to
+ /// the IEW stage.
+ bool strictlyOrdered; // *I
};
diff --git a/src/cpu/o3/commit_impl.hh b/src/cpu/o3/commit_impl.hh
index aa1948602..5323e1413 100644
--- a/src/cpu/o3/commit_impl.hh
+++ b/src/cpu/o3/commit_impl.hh
@@ -1145,7 +1145,7 @@ DefaultCommit<Impl>::commitHead(DynInstPtr &head_inst, unsigned inst_num)
// think are possible.
assert(head_inst->isNonSpeculative() || head_inst->isStoreConditional()
|| head_inst->isMemBarrier() || head_inst->isWriteBarrier() ||
- (head_inst->isLoad() && head_inst->uncacheable()));
+ (head_inst->isLoad() && head_inst->strictlyOrdered()));
DPRINTF(Commit, "Encountered a barrier or non-speculative "
"instruction [sn:%lli] at the head of the ROB, PC %s.\n",
@@ -1162,11 +1162,11 @@ DefaultCommit<Impl>::commitHead(DynInstPtr &head_inst, unsigned inst_num)
// it is executed.
head_inst->clearCanCommit();
- if (head_inst->isLoad() && head_inst->uncacheable()) {
- DPRINTF(Commit, "[sn:%lli]: Uncached load, PC %s.\n",
+ if (head_inst->isLoad() && head_inst->strictlyOrdered()) {
+ DPRINTF(Commit, "[sn:%lli]: Strictly ordered load, PC %s.\n",
head_inst->seqNum, head_inst->pcState());
- toIEW->commitInfo[tid].uncached = true;
- toIEW->commitInfo[tid].uncachedLoad = head_inst;
+ toIEW->commitInfo[tid].strictlyOrdered = true;
+ toIEW->commitInfo[tid].strictlyOrderedLoad = head_inst;
} else {
++commitNonSpecStalls;
}
diff --git a/src/cpu/o3/iew_impl.hh b/src/cpu/o3/iew_impl.hh
index 4741df634..730eb0cfe 100644
--- a/src/cpu/o3/iew_impl.hh
+++ b/src/cpu/o3/iew_impl.hh
@@ -1418,9 +1418,9 @@ DefaultIEW<Impl>::writebackInsts()
// Some instructions will be sent to commit without having
// executed because they need commit to handle them.
- // E.g. Uncached loads have not actually executed when they
+ // E.g. Strictly ordered loads have not actually executed when they
// are first sent to commit. Instead commit must tell the LSQ
- // when it's ready to execute the uncached load.
+ // when it's ready to execute the strictly ordered load.
if (!inst->isSquashed() && inst->isExecuted() && inst->getFault() == NoFault) {
int dependents = instQueue.wakeDependents(inst);
@@ -1522,9 +1522,10 @@ DefaultIEW<Impl>::tick()
if (fromCommit->commitInfo[tid].nonSpecSeqNum != 0) {
//DPRINTF(IEW,"NonspecInst from thread %i",tid);
- if (fromCommit->commitInfo[tid].uncached) {
- instQueue.replayMemInst(fromCommit->commitInfo[tid].uncachedLoad);
- fromCommit->commitInfo[tid].uncachedLoad->setAtCommit();
+ if (fromCommit->commitInfo[tid].strictlyOrdered) {
+ instQueue.replayMemInst(
+ fromCommit->commitInfo[tid].strictlyOrderedLoad);
+ fromCommit->commitInfo[tid].strictlyOrderedLoad->setAtCommit();
} else {
instQueue.scheduleNonSpec(
fromCommit->commitInfo[tid].nonSpecSeqNum);
diff --git a/src/cpu/o3/lsq_unit.hh b/src/cpu/o3/lsq_unit.hh
index 6fe832bf6..e356dd442 100644
--- a/src/cpu/o3/lsq_unit.hh
+++ b/src/cpu/o3/lsq_unit.hh
@@ -559,15 +559,15 @@ LSQUnit<Impl>::read(Request *req, Request *sreqLow, Request *sreqHigh,
assert(!load_inst->isExecuted());
- // Make sure this isn't an uncacheable access
- // A bit of a hackish way to get uncached accesses to work only if they're
- // at the head of the LSQ and are ready to commit (at the head of the ROB
- // too).
- if (req->isUncacheable() &&
+ // Make sure this isn't a strictly ordered load
+ // A bit of a hackish way to get strictly ordered accesses to work
+ // only if they're at the head of the LSQ and are ready to commit
+ // (at the head of the ROB too).
+ if (req->isStrictlyOrdered() &&
(load_idx != loadHead || !load_inst->isAtCommit())) {
iewStage->rescheduleMemInst(load_inst);
++lsqRescheduledLoads;
- DPRINTF(LSQUnit, "Uncachable load [sn:%lli] PC %s\n",
+ DPRINTF(LSQUnit, "Strictly ordered load [sn:%lli] PC %s\n",
load_inst->seqNum, load_inst->pcState());
// Must delete request now that it wasn't handed off to
@@ -579,7 +579,7 @@ LSQUnit<Impl>::read(Request *req, Request *sreqLow, Request *sreqHigh,
delete sreqHigh;
}
return std::make_shared<GenericISA::M5PanicFault>(
- "Uncachable load [sn:%llx] PC %s\n",
+ "Strictly ordered load [sn:%llx] PC %s\n",
load_inst->seqNum, load_inst->pcState());
}
@@ -653,7 +653,7 @@ LSQUnit<Impl>::read(Request *req, Request *sreqLow, Request *sreqHigh,
if (store_size == 0)
continue;
- else if (storeQueue[store_idx].inst->uncacheable())
+ else if (storeQueue[store_idx].inst->strictlyOrdered())
continue;
assert(storeQueue[store_idx].inst->effAddrValid());
diff --git a/src/cpu/o3/lsq_unit_impl.hh b/src/cpu/o3/lsq_unit_impl.hh
index 9c500443e..3019e80d2 100644
--- a/src/cpu/o3/lsq_unit_impl.hh
+++ b/src/cpu/o3/lsq_unit_impl.hh
@@ -471,7 +471,7 @@ LSQUnit<Impl>::checkSnoop(PacketPtr pkt)
while (load_idx != loadTail) {
DynInstPtr ld_inst = loadQueue[load_idx];
- if (!ld_inst->effAddrValid() || ld_inst->uncacheable()) {
+ if (!ld_inst->effAddrValid() || ld_inst->strictlyOrdered()) {
incrLdIdx(load_idx);
continue;
}
@@ -528,7 +528,7 @@ LSQUnit<Impl>::checkViolations(int load_idx, DynInstPtr &inst)
*/
while (load_idx != loadTail) {
DynInstPtr ld_inst = loadQueue[load_idx];
- if (!ld_inst->effAddrValid() || ld_inst->uncacheable()) {
+ if (!ld_inst->effAddrValid() || ld_inst->strictlyOrdered()) {
incrLdIdx(load_idx);
continue;
}
@@ -617,15 +617,15 @@ LSQUnit<Impl>::executeLoad(DynInstPtr &inst)
// along to commit without the instruction completing.
if (load_fault != NoFault || !inst->readPredicate()) {
// Send this instruction to commit, also make sure iew stage
- // realizes there is activity.
- // Mark it as executed unless it is an uncached load that
- // needs to hit the head of commit.
+ // realizes there is activity. Mark it as executed unless it
+ // is a strictly ordered load that needs to hit the head of
+ // commit.
if (!inst->readPredicate())
inst->forwardOldRegs();
DPRINTF(LSQUnit, "Load [sn:%lli] not executed from %s\n",
inst->seqNum,
(load_fault != NoFault ? "fault" : "predication"));
- if (!(inst->hasRequest() && inst->uncacheable()) ||
+ if (!(inst->hasRequest() && inst->strictlyOrdered()) ||
inst->isAtCommit()) {
inst->setExecuted();
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-28 01:33:41 +0000