diff --git a/src/northbridge/intel/x4x/acpi/x4x.asl b/src/northbridge/intel/x4x/acpi/x4x.asl
index 51deea8f67..5a3c0b6132 100644
--- a/src/northbridge/intel/x4x/acpi/x4x.asl
+++ b/src/northbridge/intel/x4x/acpi/x4x.asl
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include "hostbridge.asl"
-#include "../iomap.h"
+#include "../memmap.h"
 #include <southbridge/intel/common/rcba.h>
 
 /* PCI Device Resource Consumption */
diff --git a/src/northbridge/intel/x4x/bootblock.c b/src/northbridge/intel/x4x/bootblock.c
index baa4ae336c..1192fdb1cb 100644
--- a/src/northbridge/intel/x4x/bootblock.c
+++ b/src/northbridge/intel/x4x/bootblock.c
@@ -5,7 +5,6 @@
 #include <device/pci_ops.h>
 
 #include "x4x.h"
-#include "iomap.h"
 
 void bootblock_early_northbridge_init(void)
 {
diff --git a/src/northbridge/intel/x4x/dq_dqs.c b/src/northbridge/intel/x4x/dq_dqs.c
index 7378391507..1535452c1f 100644
--- a/src/northbridge/intel/x4x/dq_dqs.c
+++ b/src/northbridge/intel/x4x/dq_dqs.c
@@ -6,7 +6,6 @@
 #include <string.h>
 #include <types.h>
 #include "x4x.h"
-#include "iomap.h"
 
 static void print_dll_setting(const struct dll_setting *dll_setting,
 			u8 default_verbose)
diff --git a/src/northbridge/intel/x4x/early_init.c b/src/northbridge/intel/x4x/early_init.c
index d3c3308831..81752cdd9f 100644
--- a/src/northbridge/intel/x4x/early_init.c
+++ b/src/northbridge/intel/x4x/early_init.c
@@ -2,7 +2,6 @@
 
 #include <stdint.h>
 #include <device/pci_ops.h>
-#include "iomap.h"
 #if CONFIG(SOUTHBRIDGE_INTEL_I82801GX)
 #include <southbridge/intel/i82801gx/i82801gx.h> /* DEFAULT_PMBASE */
 #else
diff --git a/src/northbridge/intel/x4x/iomap.h b/src/northbridge/intel/x4x/memmap.h
similarity index 79%
rename from src/northbridge/intel/x4x/iomap.h
rename to src/northbridge/intel/x4x/memmap.h
index 22a675fc42..e4aafffbf6 100644
--- a/src/northbridge/intel/x4x/iomap.h
+++ b/src/northbridge/intel/x4x/memmap.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
 
-#ifndef X4X_IOMAP_H
-#define X4X_IOMAP_H
+#ifndef X4X_MEMMAP_H
+#define X4X_MEMMAP_H
 
 #define DEFAULT_MCHBAR		0xfed14000	/* 16 KB */
 #define DEFAULT_DMIBAR		0xfed18000	/* 4 KB */
@@ -10,4 +10,4 @@
 
 #define TPM_BASE_ADDRESS	0xfed40000
 
-#endif /* X4X_IOMAP_H */
+#endif /* X4X_MEMMAP_H */
diff --git a/src/northbridge/intel/x4x/northbridge.c b/src/northbridge/intel/x4x/northbridge.c
index 99b1f21843..5e46270dc1 100644
--- a/src/northbridge/intel/x4x/northbridge.c
+++ b/src/northbridge/intel/x4x/northbridge.c
@@ -8,7 +8,7 @@
 #include <device/device.h>
 #include <boot/tables.h>
 #include <acpi/acpi.h>
-#include <northbridge/intel/x4x/iomap.h>
+#include <northbridge/intel/x4x/memmap.h>
 #include <northbridge/intel/x4x/chip.h>
 #include <northbridge/intel/x4x/x4x.h>
 #include <cpu/intel/smm_reloc.h>
diff --git a/src/northbridge/intel/x4x/raminit.c b/src/northbridge/intel/x4x/raminit.c
index c68c70bd31..a1be5aa449 100644
--- a/src/northbridge/intel/x4x/raminit.c
+++ b/src/northbridge/intel/x4x/raminit.c
@@ -14,7 +14,6 @@
 #include <timestamp.h>
 #include <types.h>
 
-#include "iomap.h"
 #include "x4x.h"
 
 #define MRC_CACHE_VERSION 0
diff --git a/src/northbridge/intel/x4x/raminit_ddr23.c b/src/northbridge/intel/x4x/raminit_ddr23.c
index 2c250683a1..617ce11581 100644
--- a/src/northbridge/intel/x4x/raminit_ddr23.c
+++ b/src/northbridge/intel/x4x/raminit_ddr23.c
@@ -13,7 +13,6 @@
 #include <southbridge/intel/i82801jx/i82801jx.h>
 #endif
 #include <string.h>
-#include "iomap.h"
 #include "x4x.h"
 
 #define ME_UMA_SIZEMB 0
diff --git a/src/northbridge/intel/x4x/rcven.c b/src/northbridge/intel/x4x/rcven.c
index 506282bc38..82481abe30 100644
--- a/src/northbridge/intel/x4x/rcven.c
+++ b/src/northbridge/intel/x4x/rcven.c
@@ -3,7 +3,6 @@
 #include <device/mmio.h>
 #include <console/console.h>
 #include <delay.h>
-#include "iomap.h"
 #include "x4x.h"
 
 #define MAX_COARSE 15
diff --git a/src/northbridge/intel/x4x/x4x.h b/src/northbridge/intel/x4x/x4x.h
index 45785a02a1..98b6038f5b 100644
--- a/src/northbridge/intel/x4x/x4x.h
+++ b/src/northbridge/intel/x4x/x4x.h
@@ -4,7 +4,7 @@
 #define __NORTHBRIDGE_INTEL_X4X_H__
 
 #include <stdint.h>
-#include "iomap.h"
+#include "memmap.h"
 
 /*
  * D0:F0