diff --git a/src/northbridge/amd/agesa/family10/northbridge.c b/src/northbridge/amd/agesa/family10/northbridge.c
index 01240761ca..2bea5d1c78 100644
--- a/src/northbridge/amd/agesa/family10/northbridge.c
+++ b/src/northbridge/amd/agesa/family10/northbridge.c
@@ -923,11 +923,6 @@ static void amdfam10_domain_set_resources(device_t dev)
 	u32 reset_memhole = 1;
 #endif
 
-	setup_bsp_ramtop();
-#if CONFIG_GFXUMA
-#error Northbridge does not set uma_memory_base or uma_memory_size.
-#endif
-
 #if CONFIG_PCI_64BIT_PREF_MEM
 
 	for (link = dev->link_list; link; link = link->next) {
@@ -1439,6 +1434,19 @@ static struct device_operations cpu_bus_ops = {
 
 static void root_complex_enable_dev(struct device *dev)
 {
+	static int done = 0;
+
+	/* Do not delay UMA setup, as a device on the PCI bus may evaluate
+	   the global uma_memory variables already in its enable function. */
+	if (!done) {
+		setup_bsp_ramtop();
+#if CONFIG_GFXUMA
+#error Northbridge does not set uma_memory_base or uma_memory_size.
+		setup_uma_memory();
+#endif
+		done = 1;
+	}
+
 	/* Set the operations if it is a special bus type */
 	if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
 		dev->ops = &pci_domain_ops;
diff --git a/src/northbridge/amd/agesa/family12/northbridge.c b/src/northbridge/amd/agesa/family12/northbridge.c
index 6689e71f88..7f1478714b 100644
--- a/src/northbridge/amd/agesa/family12/northbridge.c
+++ b/src/northbridge/amd/agesa/family12/northbridge.c
@@ -601,9 +601,6 @@ static void domain_set_resources(device_t dev)
     u32 reset_memhole = 1;
 #endif
 
-	setup_bsp_ramtop();
-	setup_uma_memory();
-
 #if CONFIG_PCI_64BIT_PREF_MEM
 
 printk(BIOS_DEBUG, "adsr - CONFIG_PCI_64BIT_PREF_MEM is true.\n");
@@ -914,6 +911,16 @@ static struct device_operations cpu_bus_ops = {
 static void root_complex_enable_dev(struct device *dev)
 {
     printk(BIOS_DEBUG, "\nFam12h - northbridge.c - root_complex_enable_dev - Start.\n");
+    static int done = 0;
+
+	/* Do not delay UMA setup, as a device on the PCI bus may evaluate
+	   the global uma_memory variables already in its enable function. */
+    if (!done) {
+       setup_bsp_ramtop();
+       setup_uma_memory();
+       done = 1;
+    }
+
     /* Set the operations if it is a special bus type */
     if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
         dev->ops = &pci_domain_ops;
diff --git a/src/northbridge/amd/agesa/family14/northbridge.c b/src/northbridge/amd/agesa/family14/northbridge.c
index 8742f11904..7ff9adfbba 100644
--- a/src/northbridge/amd/agesa/family14/northbridge.c
+++ b/src/northbridge/amd/agesa/family14/northbridge.c
@@ -564,9 +564,6 @@ static void domain_set_resources(device_t dev)
 	u32 reset_memhole = 1;
 #endif
 
-	setup_bsp_ramtop();
-	setup_uma_memory();
-
 #if CONFIG_PCI_64BIT_PREF_MEM
 
 	printk(BIOS_DEBUG, "adsr - CONFIG_PCI_64BIT_PREF_MEM is true.\n");
@@ -895,7 +892,18 @@ static struct device_operations cpu_bus_ops = {
 	.scan_bus = cpu_bus_scan,
 };
 
-static void root_complex_enable_dev(struct device *dev) {
+static void root_complex_enable_dev(struct device *dev)
+{
+	static int done = 0;
+
+	/* Do not delay UMA setup, as a device on the PCI bus may evaluate
+	   the global uma_memory variables already in its enable function. */
+	if (!done) {
+		setup_bsp_ramtop();
+		setup_uma_memory();
+		done = 1;
+	}
+
 	/* Set the operations if it is a special bus type */
 	if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
 		dev->ops = &pci_domain_ops;
diff --git a/src/northbridge/amd/agesa/family15/northbridge.c b/src/northbridge/amd/agesa/family15/northbridge.c
index 742ef890cf..da67af42b0 100644
--- a/src/northbridge/amd/agesa/family15/northbridge.c
+++ b/src/northbridge/amd/agesa/family15/northbridge.c
@@ -673,9 +673,6 @@ static void domain_set_resources(device_t dev)
 	u32 reset_memhole = 1;
 #endif
 
-	setup_bsp_ramtop();
-	setup_uma_memory();
-
 #if CONFIG_PCI_64BIT_PREF_MEM
 
 	for (link = dev->link_list; link; link = link->next) {
@@ -1126,6 +1123,16 @@ static struct device_operations cpu_bus_ops = {
 
 static void root_complex_enable_dev(struct device *dev)
 {
+	static int done = 0;
+
+	/* Do not delay UMA setup, as a device on the PCI bus may evaluate
+	   the global uma_memory variables already in its enable function. */
+	if (!done) {
+		setup_bsp_ramtop();
+		setup_uma_memory();
+		done = 1;
+	}
+
 	/* Set the operations if it is a special bus type */
 	if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
 		dev->ops = &pci_domain_ops;
diff --git a/src/northbridge/amd/agesa/family15tn/northbridge.c b/src/northbridge/amd/agesa/family15tn/northbridge.c
index 063afa9895..5d50b09b88 100644
--- a/src/northbridge/amd/agesa/family15tn/northbridge.c
+++ b/src/northbridge/amd/agesa/family15tn/northbridge.c
@@ -684,9 +684,6 @@ static void domain_set_resources(device_t dev)
 	u32 reset_memhole = 1;
 #endif
 
-	setup_bsp_ramtop();
-	setup_uma_memory();
-
 #if CONFIG_PCI_64BIT_PREF_MEM
 
 	for (link = dev->link_list; link; link = link->next) {
@@ -1133,6 +1130,16 @@ static struct device_operations cpu_bus_ops = {
 
 static void root_complex_enable_dev(struct device *dev)
 {
+	static int done = 0;
+
+	/* Do not delay UMA setup, as a device on the PCI bus may evaluate
+	   the global uma_memory variables already in its enable function. */
+	if (!done) {
+		setup_bsp_ramtop();
+		setup_uma_memory();
+		done = 1;
+	}
+
 	/* Set the operations if it is a special bus type */
 	if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
 		dev->ops = &pci_domain_ops;
diff --git a/src/northbridge/amd/amdfam10/northbridge.c b/src/northbridge/amd/amdfam10/northbridge.c
index c73b38c8a4..a30bd91791 100644
--- a/src/northbridge/amd/amdfam10/northbridge.c
+++ b/src/northbridge/amd/amdfam10/northbridge.c
@@ -888,9 +888,6 @@ static void amdfam10_domain_set_resources(device_t dev)
 	u32 reset_memhole = 1;
 #endif
 
-	setup_bsp_ramtop();
-	setup_uma_memory();
-
 #if CONFIG_PCI_64BIT_PREF_MEM
 
 	for(link = dev->link_list; link; link = link->next) {
@@ -1463,6 +1460,16 @@ static struct device_operations cpu_bus_ops = {
 
 static void root_complex_enable_dev(struct device *dev)
 {
+	static int done = 0;
+
+	/* Do not delay UMA setup, as a device on the PCI bus may evaluate
+	   the global uma_memory variables already in its enable function. */
+	if (!done) {
+		setup_bsp_ramtop();
+		setup_uma_memory();
+		done = 1;
+	}
+
 	/* Set the operations if it is a special bus type */
 	if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
 		dev->ops = &pci_domain_ops;
diff --git a/src/northbridge/amd/amdk8/northbridge.c b/src/northbridge/amd/amdk8/northbridge.c
index 9f2fe66c29..eba018fa3e 100644
--- a/src/northbridge/amd/amdk8/northbridge.c
+++ b/src/northbridge/amd/amdk8/northbridge.c
@@ -884,9 +884,6 @@ static void amdk8_domain_set_resources(device_t dev)
 	u32 reset_memhole = 1;
 #endif
 
-	setup_bsp_ramtop();
-	setup_uma_memory();
-
 #if 0
 	/* Place the IO devices somewhere safe */
 	io = find_resource(dev, 0);
@@ -1349,6 +1346,16 @@ static struct device_operations cpu_bus_ops = {
 
 static void root_complex_enable_dev(struct device *dev)
 {
+	static int done = 0;
+
+	/* Do not delay UMA setup, as a device on the PCI bus may evaluate
+	   the global uma_memory variables already in its enable function. */
+	if (!done) {
+		setup_bsp_ramtop();
+		setup_uma_memory();
+		done = 1;
+	}
+
 	/* Set the operations if it is a special bus type */
 	if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
 		dev->ops = &pci_domain_ops;