diff --git a/src/mainboard/amd/dbm690t/mainboard.c b/src/mainboard/amd/dbm690t/mainboard.c
index c5515b42a6..33f0839597 100644
--- a/src/mainboard/amd/dbm690t/mainboard.c
+++ b/src/mainboard/amd/dbm690t/mainboard.c
@@ -186,46 +186,7 @@ static void dbm690t_enable(device_t dev)
 {
 	printk(BIOS_INFO, "Mainboard DBM690T Enable. dev=0x%p\n", dev);
 
-#if CONFIG_GFXUMA
-	msr_t msr, msr2;
-
-	/* TOP_MEM: the top of DRAM below 4G */
-	msr = rdmsr(TOP_MEM);
-	printk(BIOS_INFO, "%s, TOP MEM: msr.lo = 0x%08x, msr.hi = 0x%08x\n",
-		    __func__, msr.lo, msr.hi);
-
-	/* TOP_MEM2: the top of DRAM above 4G */
-	msr2 = rdmsr(TOP_MEM2);
-	printk(BIOS_INFO, "%s, TOP MEM2: msr2.lo = 0x%08x, msr2.hi = 0x%08x\n",
-		    __func__, msr2.lo, msr2.hi);
-
-	switch (msr.lo) {
-	case 0x10000000:	/* 256M system memory */
-		uma_memory_size = 0x2000000;	/* 32M recommended UMA */
-		break;
-
-	case 0x18000000:	/* 384M system memory */
-		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
-		break;
-
-	case 0x20000000:	/* 512M system memory */
-		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
-		break;
-
-	default:		/* 1GB and above system memory */
-		uma_memory_size = 0x8000000;	/* 128M recommended UMA */
-		break;
-	}
-
-	uma_memory_base = msr.lo - uma_memory_size;	/* TOP_MEM1 */
-	printk(BIOS_INFO, "%s: uma size 0x%08llx, memory start 0x%08llx\n",
-		    __func__, uma_memory_size, uma_memory_base);
-
-	/* TODO: TOP_MEM2 */
-#else
-	uma_memory_size = 0x8000000;	/* 128M recommended UMA */
-	uma_memory_base = 0x38000000;	/* 1GB  system memory supposed */
-#endif
+	setup_uma_memory();
 
 	enable_onboard_nic();
 	get_ide_dma66();
diff --git a/src/mainboard/amd/mahogany/mainboard.c b/src/mainboard/amd/mahogany/mainboard.c
index a263f6eeb4..5cc6c92ca0 100644
--- a/src/mainboard/amd/mahogany/mainboard.c
+++ b/src/mainboard/amd/mahogany/mainboard.c
@@ -102,46 +102,7 @@ u8 is_dev3_present(void)
 static void mahogany_enable(device_t dev)
 {
 	printk(BIOS_INFO, "Mainboard MAHOGANY Enable. dev=0x%p\n", dev);
-
-#if CONFIG_GFXUMA
-	msr_t msr, msr2;
-
-	/* TOP_MEM: the top of DRAM below 4G */
-	msr = rdmsr(TOP_MEM);
-	printk
-	    (BIOS_INFO, "%s, TOP MEM: msr.lo = 0x%08x, msr.hi = 0x%08x\n",
-	     __func__, msr.lo, msr.hi);
-
-	/* TOP_MEM2: the top of DRAM above 4G */
-	msr2 = rdmsr(TOP_MEM2);
-	printk
-	    (BIOS_INFO, "%s, TOP MEM2: msr2.lo = 0x%08x, msr2.hi = 0x%08x\n",
-	     __func__, msr2.lo, msr2.hi);
-
-	/* refer to UMA Size Consideration in 780 BDG. */
-	switch (msr.lo) {
-	case 0x10000000:	/* 256M system memory */
-		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
-		break;
-
-	case 0x20000000:	/* 512M system memory */
-		uma_memory_size = 0x8000000;	/* 128M recommended UMA */
-		break;
-
-	default:		/* 1GB and above system memory */
-		uma_memory_size = 0x10000000;	/* 256M recommended UMA */
-		break;
-	}
-
-	uma_memory_base = msr.lo - uma_memory_size;	/* TOP_MEM1 */
-	printk(BIOS_INFO, "%s: uma size 0x%08llx, memory start 0x%08llx\n",
-		    __func__, uma_memory_size, uma_memory_base);
-
-	/* TODO: TOP_MEM2 */
-#else
-	uma_memory_size = 0x8000000;	/* 128M recommended UMA */
-	uma_memory_base = 0x38000000;	/* 1GB  system memory supposed */
-#endif
+	setup_uma_memory();
 
 	set_pcie_dereset();
 	/* get_ide_dma66(); */
diff --git a/src/mainboard/amd/pistachio/mainboard.c b/src/mainboard/amd/pistachio/mainboard.c
index 6f62b58688..dfee58613c 100644
--- a/src/mainboard/amd/pistachio/mainboard.c
+++ b/src/mainboard/amd/pistachio/mainboard.c
@@ -256,46 +256,7 @@ static void pistachio_enable(device_t dev)
 {
 	printk(BIOS_INFO, "Mainboard Pistachio Enable. dev=0x%p\n", dev);
 
-#if CONFIG_GFXUMA
-	msr_t msr, msr2;
-
-	/* TOP_MEM: the top of DRAM below 4G */
-	msr = rdmsr(TOP_MEM);
-	printk(BIOS_INFO, "%s, TOP MEM: msr.lo = 0x%08x, msr.hi = 0x%08x\n",
-		    __func__, msr.lo, msr.hi);
-
-	/* TOP_MEM2: the top of DRAM above 4G */
-	msr2 = rdmsr(TOP_MEM2);
-	printk(BIOS_INFO, "%s, TOP MEM2: msr2.lo = 0x%08x, msr2.hi = 0x%08x\n",
-		    __func__, msr2.lo, msr2.hi);
-
-	switch (msr.lo) {
-	case 0x10000000:	/* 256M system memory */
-		uma_memory_size = 0x2000000;	/* 32M recommended UMA */
-		break;
-
-	case 0x18000000:	/* 384M system memory */
-		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
-		break;
-
-	case 0x20000000:	/* 512M system memory */
-		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
-		break;
-
-	default:		/* 1GB and above system memory */
-		uma_memory_size = 0x8000000;	/* 128M recommended UMA */
-		break;
-	}
-
-	uma_memory_base = msr.lo - uma_memory_size;	/* TOP_MEM1 */
-	printk(BIOS_INFO, "%s: uma size 0x%08llx, memory start 0x%08llx\n",
-		    __func__, uma_memory_size, uma_memory_base);
-
-	/* TODO: TOP_MEM2 */
-#else
-	uma_memory_size = 0x8000000;	/* 128M recommended UMA */
-	uma_memory_base = 0x38000000;	/* 1GB  system memory supposed */
-#endif
+	setup_uma_memory();
 
 	enable_onboard_nic();
 
diff --git a/src/mainboard/asrock/939a785gmh/mainboard.c b/src/mainboard/asrock/939a785gmh/mainboard.c
index d1b06c5afc..e574fa90c7 100644
--- a/src/mainboard/asrock/939a785gmh/mainboard.c
+++ b/src/mainboard/asrock/939a785gmh/mainboard.c
@@ -101,45 +101,7 @@ static void mb_enable(device_t dev)
 {
 	printk(BIOS_INFO, "Mainboard 939A785GMH/128M Enable. dev=0x%p\n", dev);
 
-#if CONFIG_GFXUMA
-	msr_t msr, msr2;
-
-	/* TOP_MEM: the top of DRAM below 4G */
-	msr = rdmsr(TOP_MEM);
-	printk
-	    (BIOS_INFO, "%s, TOP MEM: msr.lo = 0x%08x, msr.hi = 0x%08x\n",
-	     __func__, msr.lo, msr.hi);
-
-	/* TOP_MEM2: the top of DRAM above 4G */
-	msr2 = rdmsr(TOP_MEM2);
-	printk
-	    (BIOS_INFO, "%s, TOP MEM2: msr2.lo = 0x%08x, msr2.hi = 0x%08x\n",
-	     __func__, msr2.lo, msr2.hi);
-
-	/* refer to UMA Size Consideration in 780 BDG. */
-	switch (msr.lo) {
-	case 0x10000000:	/* 256M system memory */
-		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
-		break;
-
-	case 0x20000000:	/* 512M system memory */
-		uma_memory_size = 0x8000000;	/* 128M recommended UMA */
-		break;
-
-	default:		/* 1GB and above system memory */
-		uma_memory_size = 0x10000000;	/* 256M recommended UMA */
-		break;
-	}
-
-	uma_memory_base = msr.lo - uma_memory_size;	/* TOP_MEM1 */
-	printk(BIOS_INFO, "%s: uma size 0x%08llx, memory start 0x%08llx\n",
-		    __func__, uma_memory_size, uma_memory_base);
-
-	/* TODO: TOP_MEM2 */
-#else
-	uma_memory_size = 0x8000000;	/* 128M recommended UMA */
-	uma_memory_base = 0x38000000;	/* 1GB  system memory supposed */
-#endif
+	setup_uma_memory();
 
 	set_pcie_dereset();
 	/* get_ide_dma66(); */
diff --git a/src/mainboard/kontron/kt690/mainboard.c b/src/mainboard/kontron/kt690/mainboard.c
index fcb24620c6..726a26ece2 100644
--- a/src/mainboard/kontron/kt690/mainboard.c
+++ b/src/mainboard/kontron/kt690/mainboard.c
@@ -186,46 +186,7 @@ static void kt690_enable(device_t dev)
 {
 	printk(BIOS_INFO, "Mainboard KT690 Enable. dev=0x%p\n", dev);
 
-#if CONFIG_GFXUMA
-	msr_t msr, msr2;
-
-	/* TOP_MEM: the top of DRAM below 4G */
-	msr = rdmsr(TOP_MEM);
-	printk(BIOS_INFO, "%s, TOP MEM: msr.lo = 0x%08x, msr.hi = 0x%08x\n",
-		    __func__, msr.lo, msr.hi);
-
-	/* TOP_MEM2: the top of DRAM above 4G */
-	msr2 = rdmsr(TOP_MEM2);
-	printk(BIOS_INFO, "%s, TOP MEM2: msr2.lo = 0x%08x, msr2.hi = 0x%08x\n",
-		    __func__, msr2.lo, msr2.hi);
-
-	switch (msr.lo) {
-	case 0x10000000:	/* 256M system memory */
-		uma_memory_size = 0x2000000;	/* 32M recommended UMA */
-		break;
-
-	case 0x18000000:	/* 384M system memory */
-		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
-		break;
-
-	case 0x20000000:	/* 512M system memory */
-		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
-		break;
-
-	default:		/* 1GB and above system memory */
-		uma_memory_size = 0x8000000;	/* 128M recommended UMA */
-		break;
-	}
-
-	uma_memory_base = msr.lo - uma_memory_size;	/* TOP_MEM1 */
-	printk(BIOS_INFO, "%s: uma size 0x%08llx, memory start 0x%08llx\n",
-		    __func__, uma_memory_size, uma_memory_base);
-
-	/* TODO: TOP_MEM2 */
-#else
-	uma_memory_size = 0x0;
-	uma_memory_base = 0x0;
-#endif
+	setup_uma_memory();
 
 	enable_onboard_nic();
 	get_ide_dma66();
diff --git a/src/mainboard/siemens/sitemp_g1p1/mainboard.c b/src/mainboard/siemens/sitemp_g1p1/mainboard.c
index 840e060995..fa29ea321f 100644
--- a/src/mainboard/siemens/sitemp_g1p1/mainboard.c
+++ b/src/mainboard/siemens/sitemp_g1p1/mainboard.c
@@ -851,51 +851,7 @@ static void enable_dev(device_t dev)
 
 	detect_hw_variant(dev);
 	update_subsystemid(dev);
-
-#if CONFIG_GFXUMA
-	{
-	msr_t msr, msr2;
-
-	/* TOP_MEM: the top of DRAM below 4G */
-	msr = rdmsr(TOP_MEM);
-	printk(BIOS_DEBUG, "%s, TOP MEM: msr.lo = 0x%08x, msr.hi = 0x%08x\n",
-		    __func__, msr.lo, msr.hi);
-
-	/* TOP_MEM2: the top of DRAM above 4G */
-	msr2 = rdmsr(TOP_MEM2);
-
-	printk(BIOS_DEBUG, "%s, TOP MEM2: msr.lo = 0x%08x, msr.hi = 0x%08x\n",
-		    __func__, msr2.lo, msr2.hi);
-
-	switch (msr.lo) {
-	case 0x10000000:	/* 256M system memory */
-		uma_memory_size = 0x2000000;	/* 32M recommended UMA */
-		break;
-
-	case 0x18000000:	/* 384M system memory */
-		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
-		break;
-
-	case 0x20000000:	/* 512M system memory */
-		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
-		break;
-
-	default:		/* 1GB and above system memory */
-		uma_memory_size = 0x8000000;	/* 128M recommended UMA */
-		break;
-	}
-
-	uma_memory_base = msr.lo - uma_memory_size;	/* TOP_MEM1 */
-
-	printk(BIOS_INFO, "%s: uma size 0x%08llx, memory start 0x%08llx\n",
-		    __func__, uma_memory_size, uma_memory_base);
-
-	/* TODO: TOP_MEM2 */
-	}
-#else
-	uma_memory_size = 0;
-	uma_memory_base = 0;
-#endif
+	setup_uma_memory();
 
 	dev->ops->init = init;  // rest of mainboard init later
 }
diff --git a/src/mainboard/technexion/tim5690/mainboard.c b/src/mainboard/technexion/tim5690/mainboard.c
index ab21212223..d1994cb29e 100644
--- a/src/mainboard/technexion/tim5690/mainboard.c
+++ b/src/mainboard/technexion/tim5690/mainboard.c
@@ -240,46 +240,7 @@ static void tim5690_enable(device_t dev)
 	vbios_regs.int15_regs.fun05_tv_standard = TV_MODE_NO;
 	vgabios_init(&vbios_regs);
 
-#if CONFIG_GFXUMA
-	msr_t msr, msr2;
-
-	/* TOP_MEM: the top of DRAM below 4G */
-	msr = rdmsr(TOP_MEM);
-	printk(BIOS_INFO, "%s, TOP MEM: msr.lo = 0x%08x, msr.hi = 0x%08x\n",
-		    __func__, msr.lo, msr.hi);
-
-	/* TOP_MEM2: the top of DRAM above 4G */
-	msr2 = rdmsr(TOP_MEM2);
-	printk(BIOS_INFO, "%s, TOP MEM2: msr2.lo = 0x%08x, msr2.hi = 0x%08x\n",
-		    __func__, msr2.lo, msr2.hi);
-
-	switch (msr.lo) {
-	case 0x10000000:	/* 256M system memory */
-		uma_memory_size = 0x2000000;	/* 32M recommended UMA */
-		break;
-
-	case 0x18000000:	/* 384M system memory */
-		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
-		break;
-
-	case 0x20000000:	/* 512M system memory */
-		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
-		break;
-
-	default:		/* 1GB and above system memory */
-		uma_memory_size = 0x8000000;	/* 128M recommended UMA */
-		break;
-	}
-
-	uma_memory_base = msr.lo - uma_memory_size;	/* TOP_MEM1 */
-	printk(BIOS_INFO, "%s: uma size 0x%08llx, memory start 0x%08llx\n",
-		    __func__, uma_memory_size, uma_memory_base);
-
-	/* TODO: TOP_MEM2 */
-#else
-	uma_memory_size = 0x8000000;	/* 128M recommended UMA */
-	uma_memory_base = 0x38000000;	/* 1GB  system memory supposed */
-#endif
+	setup_uma_memory();
 
 	set_thermal_config();
 }
diff --git a/src/mainboard/technexion/tim8690/mainboard.c b/src/mainboard/technexion/tim8690/mainboard.c
index 45b1b4d6f2..80a43ffebf 100644
--- a/src/mainboard/technexion/tim8690/mainboard.c
+++ b/src/mainboard/technexion/tim8690/mainboard.c
@@ -146,46 +146,7 @@ static void tim8690_enable(device_t dev)
 {
 	printk(BIOS_INFO, "Mainboard tim8690 Enable. dev=0x%p\n", dev);
 
-#if CONFIG_GFXUMA
-	msr_t msr, msr2;
-
-	/* TOP_MEM: the top of DRAM below 4G */
-	msr = rdmsr(TOP_MEM);
-	printk(BIOS_INFO, "%s, TOP MEM: msr.lo = 0x%08x, msr.hi = 0x%08x\n",
-		    __func__, msr.lo, msr.hi);
-
-	/* TOP_MEM2: the top of DRAM above 4G */
-	msr2 = rdmsr(TOP_MEM2);
-	printk(BIOS_INFO, "%s, TOP MEM2: msr2.lo = 0x%08x, msr2.hi = 0x%08x\n",
-		    __func__, msr2.lo, msr2.hi);
-
-	switch (msr.lo) {
-	case 0x10000000:	/* 256M system memory */
-		uma_memory_size = 0x2000000;	/* 32M recommended UMA */
-		break;
-
-	case 0x18000000:	/* 384M system memory */
-		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
-		break;
-
-	case 0x20000000:	/* 512M system memory */
-		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
-		break;
-
-	default:		/* 1GB and above system memory */
-		uma_memory_size = 0x8000000;	/* 128M recommended UMA */
-		break;
-	}
-
-	uma_memory_base = msr.lo - uma_memory_size;	/* TOP_MEM1 */
-	printk(BIOS_INFO, "%s: uma size 0x%08llx, memory start 0x%08llx\n",
-		    __func__, uma_memory_size, uma_memory_base);
-
-	/* TODO: TOP_MEM2 */
-#else
-	uma_memory_size = 0x8000000;	/* 128M recommended UMA */
-	uma_memory_base = 0x38000000;	/* 1GB  system memory supposed */
-#endif
+	setup_uma_memory();
 
 	enable_onboard_nic();
 	set_thermal_config();
diff --git a/src/northbridge/amd/amdk8/northbridge.c b/src/northbridge/amd/amdk8/northbridge.c
index 8b9140dd5f..a7aa19dc42 100644
--- a/src/northbridge/amd/amdk8/northbridge.c
+++ b/src/northbridge/amd/amdk8/northbridge.c
@@ -18,6 +18,7 @@
 #include <cpu/cpu.h>
 
 #include <cpu/x86/lapic.h>
+#include <cpu/amd/mtrr.h>
 
 #include <cpu/amd/multicore.h>
 #if CONFIG_LOGICAL_CPUS
@@ -822,6 +823,68 @@ static u32 hoist_memory(unsigned long hole_startk, int node_id)
 #include <cbmem.h>
 #endif
 
+void setup_uma_memory(void)
+{
+#if CONFIG_GFXUMA
+	msr_t msr, msr2;
+
+	/* TOP_MEM: the top of DRAM below 4G */
+	msr = rdmsr(TOP_MEM);
+	printk(BIOS_INFO, "%s, TOP MEM: msr.lo = 0x%08x, msr.hi = 0x%08x\n",
+		    __func__, msr.lo, msr.hi);
+
+	/* TOP_MEM2: the top of DRAM above 4G */
+	msr2 = rdmsr(TOP_MEM2);
+	printk(BIOS_INFO, "%s, TOP MEM2: msr.lo = 0x%08x, msr.hi = 0x%08x\n",
+		    __func__, msr2.lo, msr2.hi);
+
+#if !CONFIG_BOARD_ASROCK_939A785GMH && !CONFIG_BOARD_AMD_MAHOGANY
+
+	switch (msr.lo) {
+	case 0x10000000:	/* 256M system memory */
+		uma_memory_size = 0x2000000;	/* 32M recommended UMA */
+		break;
+
+	case 0x18000000:	/* 384M system memory */
+		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
+		break;
+
+	case 0x20000000:	/* 512M system memory */
+		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
+		break;
+
+	default:		/* 1GB and above system memory */
+		uma_memory_size = 0x8000000;	/* 128M recommended UMA */
+		break;
+	}
+#else
+	/* refer to UMA Size Consideration in 780 BDG. */
+	switch (msr.lo) {
+	case 0x10000000:	/* 256M system memory */
+		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
+		break;
+
+	case 0x20000000:	/* 512M system memory */
+		uma_memory_size = 0x8000000;	/* 128M recommended UMA */
+		break;
+
+	default:		/* 1GB and above system memory */
+		uma_memory_size = 0x10000000;	/* 256M recommended UMA */
+		break;
+	}
+#endif
+
+	uma_memory_base = msr.lo - uma_memory_size;	/* TOP_MEM1 */
+	printk(BIOS_INFO, "%s: uma size 0x%08llx, memory start 0x%08llx\n",
+		    __func__, uma_memory_size, uma_memory_base);
+
+	/* TODO: TOP_MEM2 */
+#else
+	uma_memory_size = 0x8000000;	/* 128M recommended UMA */
+	uma_memory_base = 0x38000000;	/* 1GB  system memory supposed */
+#endif
+}
+
 static void amdk8_domain_set_resources(device_t dev)
 {
 #if CONFIG_PCI_64BIT_PREF_MEM