diff --git a/src/soc/amd/cezanne/root_complex.c b/src/soc/amd/cezanne/root_complex.c
index cea3b20dd5..2e3c5c7c7f 100644
--- a/src/soc/amd/cezanne/root_complex.c
+++ b/src/soc/amd/cezanne/root_complex.c
@@ -207,7 +207,7 @@ struct device_operations cezanne_root_complex_operations = {
 
 uint32_t get_iohc_misc_smn_base(struct device *domain)
 {
-	return 0x13b10000;
+	return SMN_IOHC_MISC_BASE_13B1;
 }
 
 static const struct non_pci_mmio_reg non_pci_mmio[] = {
diff --git a/src/soc/amd/common/block/include/amdblocks/root_complex.h b/src/soc/amd/common/block/include/amdblocks/root_complex.h
index d9575c1bd4..6149897b1e 100644
--- a/src/soc/amd/common/block/include/amdblocks/root_complex.h
+++ b/src/soc/amd/common/block/include/amdblocks/root_complex.h
@@ -6,6 +6,8 @@
 #include <device/device.h>
 #include <types.h>
 
+#define SMN_IOHC_MISC_BASE_13B1	0x13b10000
+
 #define NON_PCI_RES_IDX_AUTO	0
 
 struct non_pci_mmio_reg {
diff --git a/src/soc/amd/glinda/root_complex.c b/src/soc/amd/glinda/root_complex.c
index 3ae7688699..cf9d7e481f 100644
--- a/src/soc/amd/glinda/root_complex.c
+++ b/src/soc/amd/glinda/root_complex.c
@@ -237,7 +237,7 @@ struct device_operations glinda_root_complex_operations = {
 
 uint32_t get_iohc_misc_smn_base(struct device *domain)
 {
-	return 0x13b10000;
+	return SMN_IOHC_MISC_BASE_13B1;
 }
 
 static const struct non_pci_mmio_reg non_pci_mmio[] = {
diff --git a/src/soc/amd/mendocino/root_complex.c b/src/soc/amd/mendocino/root_complex.c
index 0b3f56e32f..834052f177 100644
--- a/src/soc/amd/mendocino/root_complex.c
+++ b/src/soc/amd/mendocino/root_complex.c
@@ -398,7 +398,7 @@ struct device_operations mendocino_root_complex_operations = {
 
 uint32_t get_iohc_misc_smn_base(struct device *domain)
 {
-	return 0x13b10000;
+	return SMN_IOHC_MISC_BASE_13B1;
 }
 
 static const struct non_pci_mmio_reg non_pci_mmio[] = {
diff --git a/src/soc/amd/phoenix/root_complex.c b/src/soc/amd/phoenix/root_complex.c
index 6b1a81e499..a1f256f73d 100644
--- a/src/soc/amd/phoenix/root_complex.c
+++ b/src/soc/amd/phoenix/root_complex.c
@@ -237,7 +237,7 @@ struct device_operations phoenix_root_complex_operations = {
 
 uint32_t get_iohc_misc_smn_base(struct device *domain)
 {
-	return 0x13b10000;
+	return SMN_IOHC_MISC_BASE_13B1;
 }
 
 static const struct non_pci_mmio_reg non_pci_mmio[] = {
diff --git a/src/soc/amd/picasso/root_complex.c b/src/soc/amd/picasso/root_complex.c
index bfcc86f9c4..7ae1df0481 100644
--- a/src/soc/amd/picasso/root_complex.c
+++ b/src/soc/amd/picasso/root_complex.c
@@ -213,7 +213,7 @@ struct device_operations picasso_root_complex_operations = {
 
 uint32_t get_iohc_misc_smn_base(struct device *domain)
 {
-	return 0x13b10000;
+	return SMN_IOHC_MISC_BASE_13B1;
 }
 
 static const struct non_pci_mmio_reg non_pci_mmio[] = {