diff --git a/src/northbridge/intel/e7501/Makefile.inc b/src/northbridge/intel/e7501/Makefile.inc
index ea44b26..23eada5 100644
--- a/src/northbridge/intel/e7501/Makefile.inc
+++ b/src/northbridge/intel/e7501/Makefile.inc
@@ -1 +1 @@
-obj-y += northbridge.o
+ramstage-y += northbridge.c
diff --git a/src/northbridge/intel/e7520/Makefile.inc b/src/northbridge/intel/e7520/Makefile.inc
index a23c31d..32c6836 100644
--- a/src/northbridge/intel/e7520/Makefile.inc
+++ b/src/northbridge/intel/e7520/Makefile.inc
@@ -1,5 +1,5 @@
-driver-y += northbridge.o
-driver-y += pciexp_porta.o
-driver-y += pciexp_porta1.o
-driver-y += pciexp_portb.o
-driver-y += pciexp_portc.o
+driver-y += northbridge.c
+driver-y += pciexp_porta.c
+driver-y += pciexp_porta1.c
+driver-y += pciexp_portb.c
+driver-y += pciexp_portc.c
diff --git a/src/northbridge/intel/e7525/Makefile.inc b/src/northbridge/intel/e7525/Makefile.inc
index a23c31d..32c6836 100644
--- a/src/northbridge/intel/e7525/Makefile.inc
+++ b/src/northbridge/intel/e7525/Makefile.inc
@@ -1,5 +1,5 @@
-driver-y += northbridge.o
-driver-y += pciexp_porta.o
-driver-y += pciexp_porta1.o
-driver-y += pciexp_portb.o
-driver-y += pciexp_portc.o
+driver-y += northbridge.c
+driver-y += pciexp_porta.c
+driver-y += pciexp_porta1.c
+driver-y += pciexp_portb.c
+driver-y += pciexp_portc.c
diff --git a/src/northbridge/intel/i3100/Makefile.inc b/src/northbridge/intel/i3100/Makefile.inc
index c776b05..c2de0fc 100644
--- a/src/northbridge/intel/i3100/Makefile.inc
+++ b/src/northbridge/intel/i3100/Makefile.inc
@@ -1,3 +1,3 @@
-driver-y += northbridge.o
-driver-y += pciexp_porta.o
-driver-y += pciexp_porta_ep80579.o
+driver-y += northbridge.c
+driver-y += pciexp_porta.c
+driver-y += pciexp_porta_ep80579.c
diff --git a/src/northbridge/intel/i440bx/Makefile.inc b/src/northbridge/intel/i440bx/Makefile.inc
index c6b4809..16d702a 100644
--- a/src/northbridge/intel/i440bx/Makefile.inc
+++ b/src/northbridge/intel/i440bx/Makefile.inc
@@ -18,5 +18,5 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 ##
 
-driver-y += northbridge.o
+driver-y += northbridge.c
 
diff --git a/src/northbridge/intel/i440lx/Makefile.inc b/src/northbridge/intel/i440lx/Makefile.inc
index c6b4809..16d702a 100644
--- a/src/northbridge/intel/i440lx/Makefile.inc
+++ b/src/northbridge/intel/i440lx/Makefile.inc
@@ -18,5 +18,5 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 ##
 
-driver-y += northbridge.o
+driver-y += northbridge.c
 
diff --git a/src/northbridge/intel/i82810/Makefile.inc b/src/northbridge/intel/i82810/Makefile.inc
index c6b4809..16d702a 100644
--- a/src/northbridge/intel/i82810/Makefile.inc
+++ b/src/northbridge/intel/i82810/Makefile.inc
@@ -18,5 +18,5 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 ##
 
-driver-y += northbridge.o
+driver-y += northbridge.c
 
diff --git a/src/northbridge/intel/i82830/Makefile.inc b/src/northbridge/intel/i82830/Makefile.inc
index 57dedfd..e3a990a 100644
--- a/src/northbridge/intel/i82830/Makefile.inc
+++ b/src/northbridge/intel/i82830/Makefile.inc
@@ -1,4 +1,4 @@
-driver-y += northbridge.o
-driver-y += vga.o
+driver-y += northbridge.c
+driver-y += vga.c
 
-smmobj-$(CONFIG_HAVE_SMI_HANDLER) += i82830_smihandler.o
+smm-$(CONFIG_HAVE_SMI_HANDLER) += i82830_smihandler.c
diff --git a/src/northbridge/intel/i855/Makefile.inc b/src/northbridge/intel/i855/Makefile.inc
index ea44b26..23eada5 100644
--- a/src/northbridge/intel/i855/Makefile.inc
+++ b/src/northbridge/intel/i855/Makefile.inc
@@ -1 +1 @@
-obj-y += northbridge.o
+ramstage-y += northbridge.c
diff --git a/src/northbridge/intel/i945/Makefile.inc b/src/northbridge/intel/i945/Makefile.inc
index 5447e44..57362c6 100644
--- a/src/northbridge/intel/i945/Makefile.inc
+++ b/src/northbridge/intel/i945/Makefile.inc
@@ -17,6 +17,6 @@
 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 #
 
-driver-y += northbridge.o
-driver-y += gma.o
-obj-$(CONFIG_GENERATE_ACPI_TABLES) += acpi.o
+driver-y += northbridge.c
+driver-y += gma.c
+ramstage-$(CONFIG_GENERATE_ACPI_TABLES) += acpi.c