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-rw-r--r--nexus/arch.cc3
1 files changed, 3 insertions, 0 deletions
diff --git a/nexus/arch.cc b/nexus/arch.cc
index b0a22894..663941ff 100644
--- a/nexus/arch.cc
+++ b/nexus/arch.cc
@@ -382,6 +382,9 @@ bool Arch::place()
if (placer == "heap") {
PlacerHeapCfg cfg(getCtx());
+ cfg.ioBufTypes.insert(id_SEIO33_CORE);
+ cfg.ioBufTypes.insert(id_SEIO18_CORE);
+ cfg.ioBufTypes.insert(id_OSC_CORE);
cfg.criticalityExponent = 7;
if (!placer_heap(getCtx(), cfg))
return false;