arm: Add TLB PMU probes

This changeset adds probe points that can be used to implement PMU
counters for TLB stats. The following probes are supported:

* ArmISA::TLB::ppRefills / TLB Refills (TLB insertions)

1 files changed, 7 insertions, 0 deletions

diff --git a/src/arch/arm/tlb.cc b/src/arch/arm/tlb.cc
index 94343c1c2..7f296e7cf 100644
--- a/src/arch/arm/tlb.cc
+++ b/src/arch/arm/tlb.cc
@@ -197,6 +197,7 @@ TLB::insert(Addr addr, TlbEntry &entry)
     table[0] = entry;
 
     inserts++;
+    ppRefills->notify(1);
 }
 
 void
@@ -531,6 +532,12 @@ TLB::regStats()
     accesses = readAccesses + writeAccesses + instAccesses;
 }
 
+void
+TLB::regProbePoints()
+{
+    ppRefills.reset(new ProbePoints::PMU(getProbeManager(), "Refills"));
+}
+
 Fault
 TLB::translateSe(RequestPtr req, ThreadContext *tc, Mode mode,
                  Translation *translation, bool &delay, bool timing)