ramstage-y += cpu.c
ramstage-y += pci_ops_conf1.c
ramstage-y += pci_ops_conf2.c
-ramstage-y += pci_ops_mmconf.c
+
+ramstage-$(CONFIG_MMCONF_SUPPORT) += pci_ops_mmconf.c
+
ramstage-y += pci_ops_auto.c
ramstage-y += exception.c
ramstage-$(CONFIG_IOAPIC) += ioapic.c