diff --git a/src/northbridge/intel/x4x/acpi.c b/src/northbridge/intel/x4x/acpi.c
new file mode 100644
index 0000000..386096c
--- /dev/null
+++ b/src/northbridge/intel/x4x/acpi.c
@@ -0,0 +1,57 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ * Copyright (C) 2015 Damien Zammit <damien@zamaudio.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; version 2 of
+ * the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <types.h>
+#include <string.h>
+#include <console/console.h>
+#include <arch/acpi.h>
+#include <arch/acpigen.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <cbmem.h>
+#include <arch/acpigen.h>
+#include <cpu/cpu.h>
+#include "x4x.h"
+
+unsigned long acpi_fill_mcfg(unsigned long current)
+{
+	device_t dev;
+	u32 pciexbar = 0;
+	u32 length = 0;
+
+	dev = dev_find_slot(0, PCI_DEVFN(0,0));
+	if (!decode_pciebar(&pciexbar, &length))
+		return current;
+
+	current += acpi_create_mcfg_mmconfig((acpi_mcfg_mmconfig_t *) current,
+			pciexbar, 0x0, 0x0, (length >> 20) - 1);
+
+	return current;
+}
+
+unsigned long northbridge_write_acpi_tables(device_t device,
+					    unsigned long start,
+					    struct acpi_rsdp *rsdp)
+{
+	unsigned long current;
+	current = acpi_align_current(start);
+
+	printk(BIOS_DEBUG, "current = %lx\n", current);
+
+	return current;
+}