diff --git a/src/northbridge/intel/nehalem/northbridge.c b/src/northbridge/intel/nehalem/northbridge.c
index 233b0bb..485cb27 100644
--- a/src/northbridge/intel/nehalem/northbridge.c
+++ b/src/northbridge/intel/nehalem/northbridge.c
@@ -171,13 +171,6 @@
 	add_fixed_resources(dev, 10);
 }
 
-u32 northbridge_get_tseg_base(void)
-{
-	struct device *dev = pcidev_on_root(0, 0);
-
-	return pci_read_config32(dev, TSEG) & ~1;
-}
-
 u32 northbridge_get_tseg_size(void)
 {
 	return CONFIG_SMM_TSEG_SIZE;
diff --git a/src/northbridge/intel/nehalem/ram_calc.c b/src/northbridge/intel/nehalem/ram_calc.c
index 163f21c..ca821da 100644
--- a/src/northbridge/intel/nehalem/ram_calc.c
+++ b/src/northbridge/intel/nehalem/ram_calc.c
@@ -23,6 +23,7 @@
 #include <cpu/intel/romstage.h>
 #include <cpu/x86/mtrr.h>
 #include <program_loading.h>
+#include <cpu/intel/smm/gen1/smi.h>
 #include "nehalem.h"
 
 static uintptr_t smm_region_start(void)
@@ -32,6 +33,11 @@
 	return tom;
 }
 
+u32 northbridge_get_tseg_base(void)
+{
+	return (u32)smm_region_start & ~1;
+}
+
 void *cbmem_top(void)
 {
 	return (void *) smm_region_start();