diff --git a/src/soc/intel/baytrail/northcluster.c b/src/soc/intel/baytrail/northcluster.c
index 55ace59..c8ba9c1 100644
--- a/src/soc/intel/baytrail/northcluster.c
+++ b/src/soc/intel/baytrail/northcluster.c
@@ -20,7 +20,7 @@
 #include <device/pci_ids.h>
 #include <vendorcode/google/chromeos/chromeos.h>
 #include <arch/acpi.h>
-
+#include <stddef.h>
 #include <soc/iomap.h>
 #include <soc/iosf.h>
 #include <soc/pci_devs.h>
@@ -65,7 +65,14 @@
 
 uint32_t nc_read_top_of_low_memory(void)
 {
-	return iosf_bunit_read(BUNIT_BMBOUND) & ~((1 << 27) - 1);
+	MAYBE_STATIC uint32_t tolm = 0;
+
+	if (tolm)
+		return tolm;
+
+	tolm = iosf_bunit_read(BUNIT_BMBOUND) & ~((1 << 27) - 1);
+
+	return tolm;
 }
 
 static void nc_read_resources(device_t dev)