diff --git a/src/mainboard/emulation/qemu-i440fx/northbridge.c b/src/mainboard/emulation/qemu-i440fx/northbridge.c
index 2ea4a68c98..a2cd37b37b 100644
--- a/src/mainboard/emulation/qemu-i440fx/northbridge.c
+++ b/src/mainboard/emulation/qemu-i440fx/northbridge.c
@@ -86,9 +86,7 @@ static void cpu_pci_domain_read_resources(struct device *dev)
 	}
 
 #if !CONFIG_DYNAMIC_CBMEM
-	/* Leave some space for ACPI, PIRQ and MP tables */
-	high_tables_base = (tomk * 1024) - HIGH_MEMORY_SIZE;
-	high_tables_size = HIGH_MEMORY_SIZE;
+	set_top_of_ram(tomk * 1024);
 #endif
 
 	if (i440fx) {
diff --git a/src/northbridge/amd/gx1/northbridge.c b/src/northbridge/amd/gx1/northbridge.c
index b895a75dc9..c8f7f94ece 100644
--- a/src/northbridge/amd/gx1/northbridge.c
+++ b/src/northbridge/amd/gx1/northbridge.c
@@ -108,9 +108,7 @@ static void pci_domain_set_resources(device_t dev)
 			tolmk = tomk;
 		}
 
-		/* Leave some space for ACPI, PIRQ and MP tables */
-		high_tables_base = (tolmk * 1024) - HIGH_MEMORY_SIZE;
-		high_tables_size = HIGH_MEMORY_SIZE;
+		set_top_of_ram(tolmk * 1024);
 
 		/* Report the memory regions */
 		idx = 10;
diff --git a/src/northbridge/amd/gx2/northbridge.c b/src/northbridge/amd/gx2/northbridge.c
index 8ebb204a07..e2f4d11d82 100644
--- a/src/northbridge/amd/gx2/northbridge.c
+++ b/src/northbridge/amd/gx2/northbridge.c
@@ -290,9 +290,7 @@ static void pci_domain_set_resources(device_t dev)
 		ram_resource(dev, idx++, 0, 640);
 		ram_resource(dev, idx++, 768, tomk - 768);	/* Systop - 0xc0000 -> KB */
 
-		/* Leave some space for ACPI, PIRQ and MP tables */
-		high_tables_base = (tomk * 1024) - HIGH_MEMORY_SIZE;
-		high_tables_size = HIGH_MEMORY_SIZE;
+		set_top_of_ram(tomk * 1024);
 	}
 
 	assign_resources(dev->link_list);
diff --git a/src/northbridge/amd/lx/northbridge.c b/src/northbridge/amd/lx/northbridge.c
index 33387f99e1..df69b514cb 100644
--- a/src/northbridge/amd/lx/northbridge.c
+++ b/src/northbridge/amd/lx/northbridge.c
@@ -389,9 +389,7 @@ static void pci_domain_set_resources(device_t dev)
 		ram_resource(dev, idx++, 0, 640);
 		ram_resource(dev, idx++, 768, tomk - 768);	// Systop - 0xc0000 -> KB
 
-		/* Leave some space for ACPI, PIRQ and MP tables */
-		high_tables_base = (tomk * 1024) - HIGH_MEMORY_SIZE;
-		high_tables_size = HIGH_MEMORY_SIZE;
+		set_top_of_ram(tomk * 1024);
 	}
 
 	assign_resources(dev->link_list);
diff --git a/src/northbridge/dmp/vortex86ex/northbridge.c b/src/northbridge/dmp/vortex86ex/northbridge.c
index 5eaaf2ac7f..fcebed84c6 100644
--- a/src/northbridge/dmp/vortex86ex/northbridge.c
+++ b/src/northbridge/dmp/vortex86ex/northbridge.c
@@ -101,10 +101,7 @@ static void pci_domain_set_resources(device_t dev)
 			 */
 			tolmk = tomk;
 
-		high_tables_base = (tolmk * 1024) - HIGH_MEMORY_SIZE;
-		high_tables_size = HIGH_MEMORY_SIZE;
-		printk(BIOS_DEBUG, "tom: %lx, high_tables_base: %llx, high_tables_size: %llx\n",
-		                tomk * 1024, high_tables_base, high_tables_size);
+		set_top_of_ram(tolmk * 1024);
 
 		/* Report the memory regions */
 		idx = 10;
diff --git a/src/northbridge/intel/e7501/northbridge.c b/src/northbridge/intel/e7501/northbridge.c
index 551e1073ca..b0b150d047 100644
--- a/src/northbridge/intel/e7501/northbridge.c
+++ b/src/northbridge/intel/e7501/northbridge.c
@@ -84,9 +84,7 @@ static void pci_domain_set_resources(device_t dev)
 				(remaplimitk + 64*1024) - remapbasek);
 		}
 
-		/* Leave some space for ACPI, PIRQ and MP tables */
-		high_tables_base = (tolmk * 1024) - HIGH_MEMORY_SIZE;
-		high_tables_size = HIGH_MEMORY_SIZE;
+		set_top_of_ram(tolmk * 1024);
 	}
 	assign_resources(dev->link_list);
 }
diff --git a/src/northbridge/intel/e7505/northbridge.c b/src/northbridge/intel/e7505/northbridge.c
index 5fbc2e4e86..a63029b8c0 100644
--- a/src/northbridge/intel/e7505/northbridge.c
+++ b/src/northbridge/intel/e7505/northbridge.c
@@ -85,9 +85,7 @@ static void pci_domain_set_resources(device_t dev)
 				(remaplimitk + 64*1024) - remapbasek);
 		}
 
-		/* Leave some space for ACPI, PIRQ and MP tables */
-		high_tables_base = (tolmk * 1024) - HIGH_MEMORY_SIZE;
-		high_tables_size = HIGH_MEMORY_SIZE;
+		set_top_of_ram(tolmk * 1024);
 	}
 	assign_resources(dev->link_list);
 }
diff --git a/src/northbridge/intel/e7520/northbridge.c b/src/northbridge/intel/e7520/northbridge.c
index 57d30fa704..c632b2d29d 100644
--- a/src/northbridge/intel/e7520/northbridge.c
+++ b/src/northbridge/intel/e7520/northbridge.c
@@ -102,9 +102,7 @@ static void pci_domain_set_resources(device_t dev)
 				(remaplimitk + 64*1024) - remapbasek);
 		}
 
-		/* Leave some space for ACPI, PIRQ and MP tables */
-		high_tables_base = (tolmk * 1024) - HIGH_MEMORY_SIZE;
-		high_tables_size = HIGH_MEMORY_SIZE;
+		set_top_of_ram(tolmk * 1024);
 	}
 	assign_resources(dev->link_list);
 }
diff --git a/src/northbridge/intel/e7525/northbridge.c b/src/northbridge/intel/e7525/northbridge.c
index 1865a7c024..7625596c52 100644
--- a/src/northbridge/intel/e7525/northbridge.c
+++ b/src/northbridge/intel/e7525/northbridge.c
@@ -101,9 +101,7 @@ static void pci_domain_set_resources(device_t dev)
 				(remaplimitk + 64*1024) - remapbasek);
 		}
 
-		/* Leave some space for ACPI, PIRQ and MP tables */
-		high_tables_base = (tolmk * 1024) - HIGH_MEMORY_SIZE;
-		high_tables_size = HIGH_MEMORY_SIZE;
+		set_top_of_ram(tolmk * 1024);
 	}
 	assign_resources(dev->link_list);
 }
diff --git a/src/northbridge/intel/gm45/northbridge.c b/src/northbridge/intel/gm45/northbridge.c
index 687479e807..afd270fecf 100644
--- a/src/northbridge/intel/gm45/northbridge.c
+++ b/src/northbridge/intel/gm45/northbridge.c
@@ -166,9 +166,7 @@ static void mch_domain_read_resources(device_t dev)
 			pcie_config_size >> 10, IORESOURCE_RESERVE);
 	}
 
-	/* Leave some space for ACPI, PIRQ and MP tables */
-	high_tables_base = (tomk << 10) - HIGH_MEMORY_SIZE;
-	high_tables_size = HIGH_MEMORY_SIZE;
+	set_top_of_ram(tomk << 10);
 }
 
 static void mch_domain_set_resources(device_t dev)
diff --git a/src/northbridge/intel/i3100/northbridge.c b/src/northbridge/intel/i3100/northbridge.c
index 99a48ba44d..dcce48d334 100644
--- a/src/northbridge/intel/i3100/northbridge.c
+++ b/src/northbridge/intel/i3100/northbridge.c
@@ -126,9 +126,7 @@ static void pci_domain_set_resources(device_t dev)
 				(remaplimitk + 64*1024) - remapbasek);
 		}
 
-		/* Leave some space for ACPI, PIRQ and MP tables */
-		high_tables_base = (tolmk * 1024) - HIGH_MEMORY_SIZE;
-		high_tables_size = HIGH_MEMORY_SIZE;
+		set_top_of_ram(tolmk * 1024);
 	}
 	assign_resources(dev->link_list);
 }
diff --git a/src/northbridge/intel/i440bx/northbridge.c b/src/northbridge/intel/i440bx/northbridge.c
index 7f9e7dfb44..1e6b58e92d 100644
--- a/src/northbridge/intel/i440bx/northbridge.c
+++ b/src/northbridge/intel/i440bx/northbridge.c
@@ -67,9 +67,7 @@ static void i440bx_domain_set_resources(device_t dev)
 		ram_resource(dev, idx++, 0, 640);
 		ram_resource(dev, idx++, 768, tolmk - 768);
 
-		/* Leave some space for ACPI, PIRQ and MP tables */
-		high_tables_base = (tomk * 1024) - HIGH_MEMORY_SIZE;
-		high_tables_size = HIGH_MEMORY_SIZE;
+		set_top_of_ram(tomk * 1024);
 	}
 	assign_resources(dev->link_list);
 }
diff --git a/src/northbridge/intel/i440lx/northbridge.c b/src/northbridge/intel/i440lx/northbridge.c
index 2c6866fcf4..ca4ec6ec8d 100644
--- a/src/northbridge/intel/i440lx/northbridge.c
+++ b/src/northbridge/intel/i440lx/northbridge.c
@@ -93,9 +93,7 @@ static void i440lx_domain_set_resources(device_t dev)
 		ram_resource(dev, idx++, 0, 640);
 		ram_resource(dev, idx++, 768, tolmk - 768);
 
-		/* Leave some space for ACPI, PIRQ and MP tables */
-		high_tables_base = (tomk * 1024) - HIGH_MEMORY_SIZE;
-		high_tables_size = HIGH_MEMORY_SIZE;
+		set_top_of_ram(tomk * 1024);
 	}
 	assign_resources(dev->link_list);
 }
diff --git a/src/northbridge/intel/i5000/northbridge.c b/src/northbridge/intel/i5000/northbridge.c
index 01f150e82b..c28b0c1c42 100644
--- a/src/northbridge/intel/i5000/northbridge.c
+++ b/src/northbridge/intel/i5000/northbridge.c
@@ -111,10 +111,7 @@ static void mc_read_resources(device_t dev)
 	resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
 	    IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
 
-	/* Leave some space for ACPI, PIRQ and MP tables */
-	high_tables_base = tolm - HIGH_MEMORY_SIZE;
-	high_tables_size = HIGH_MEMORY_SIZE;
-	printk(BIOS_DEBUG, "high_tables_base: %08llx, size %lld\n", high_tables_base, high_tables_size);
+	set_top_of_ram(tolm);
 }
 
 static struct pci_operations intel_pci_ops = {
diff --git a/src/northbridge/intel/i82810/northbridge.c b/src/northbridge/intel/i82810/northbridge.c
index a98a8d350d..2e07db8099 100644
--- a/src/northbridge/intel/i82810/northbridge.c
+++ b/src/northbridge/intel/i82810/northbridge.c
@@ -121,9 +121,7 @@ static void pci_domain_set_resources(device_t dev)
 	ram_resource(dev, idx++, 768, tomk - 768);
 	uma_resource(dev, idx++, uma_memory_base >> 10, uma_memory_size >> 10);
 
-	/* Leave some space for ACPI, PIRQ and MP tables */
-	high_tables_base = (tomk_stolen * 1024) - HIGH_MEMORY_SIZE;
-	high_tables_size = HIGH_MEMORY_SIZE;
+	set_top_of_ram(tomk_stolen * 1024);
 
 	assign_resources(dev->link_list);
 }
diff --git a/src/northbridge/intel/i82830/northbridge.c b/src/northbridge/intel/i82830/northbridge.c
index 94a95bc241..08ed279750 100644
--- a/src/northbridge/intel/i82830/northbridge.c
+++ b/src/northbridge/intel/i82830/northbridge.c
@@ -90,9 +90,7 @@ static void pci_domain_set_resources(device_t dev)
 
 	assign_resources(dev->link_list);
 
-	/* Leave some space for ACPI, PIRQ and MP tables */
-	high_tables_base = (tomk_stolen * 1024) - HIGH_MEMORY_SIZE;
-	high_tables_size = HIGH_MEMORY_SIZE;
+	set_top_of_ram(tomk_stolen * 1024);
 }
 
 static struct device_operations pci_domain_ops = {
diff --git a/src/northbridge/intel/i855/northbridge.c b/src/northbridge/intel/i855/northbridge.c
index 7a0c77c80c..5c0379c757 100644
--- a/src/northbridge/intel/i855/northbridge.c
+++ b/src/northbridge/intel/i855/northbridge.c
@@ -105,9 +105,7 @@ static void pci_domain_set_resources(device_t dev)
 		/* ram_resource(dev, idx++, 1024, tolmk - 1024); */
 		ram_resource(dev, idx++, 768, tolmk - 768);
 
-		/* Leave some space for ACPI, PIRQ and MP tables */
-		high_tables_base = (tomk * 1024) - HIGH_MEMORY_SIZE;
-		high_tables_size = HIGH_MEMORY_SIZE;
+		set_top_of_ram(tomk * 1024);
 	}
 	assign_resources(dev->link_list);
 }
diff --git a/src/northbridge/intel/i945/northbridge.c b/src/northbridge/intel/i945/northbridge.c
index 7e21164276..922a81950e 100644
--- a/src/northbridge/intel/i945/northbridge.c
+++ b/src/northbridge/intel/i945/northbridge.c
@@ -170,9 +170,7 @@ static void pci_domain_set_resources(device_t dev)
 
 	assign_resources(dev->link_list);
 
-	/* Leave some space for ACPI, PIRQ and MP tables */
-	high_tables_base = (tomk_stolen * 1024) - HIGH_MEMORY_SIZE;
-	high_tables_size = HIGH_MEMORY_SIZE;
+	set_top_of_ram(tomk_stolen * 1024);
 }
 
 	/* TODO We could determine how many PCIe busses we need in
diff --git a/src/northbridge/intel/sandybridge/northbridge.c b/src/northbridge/intel/sandybridge/northbridge.c
index e3290d8985..4cd86cd9df 100644
--- a/src/northbridge/intel/sandybridge/northbridge.c
+++ b/src/northbridge/intel/sandybridge/northbridge.c
@@ -274,9 +274,7 @@ static void pci_domain_set_resources(device_t dev)
 
 	assign_resources(dev->link_list);
 
-	/* Leave some space for ACPI, PIRQ and MP tables */
-	high_tables_base = (tomk * 1024) - HIGH_MEMORY_SIZE;
-	high_tables_size = HIGH_MEMORY_SIZE;
+	set_top_of_ram(tomk * 1024);
 }
 
 	/* TODO We could determine how many PCIe busses we need in
diff --git a/src/northbridge/intel/sch/northbridge.c b/src/northbridge/intel/sch/northbridge.c
index 600bd13cd4..9dc33f581d 100644
--- a/src/northbridge/intel/sch/northbridge.c
+++ b/src/northbridge/intel/sch/northbridge.c
@@ -182,11 +182,7 @@ static void pci_domain_set_resources(device_t dev)
 
 	assign_resources(dev->link_list);
 
-	/* Leave some space for ACPI, PIRQ and MP tables. */
-	high_tables_base = tomk * 1024 - HIGH_MEMORY_SIZE;
-	high_tables_base -= uma_memory_size;
-	high_tables_base -= tseg_memory_base;
-	high_tables_size = HIGH_MEMORY_SIZE;
+	set_top_of_ram(tomk * 1024 - uma_memory_size - tseg_memory_base);
 }
 
 /*
diff --git a/src/northbridge/rdc/r8610/northbridge.c b/src/northbridge/rdc/r8610/northbridge.c
index 92025a09d1..d69c4f67f7 100644
--- a/src/northbridge/rdc/r8610/northbridge.c
+++ b/src/northbridge/rdc/r8610/northbridge.c
@@ -64,9 +64,7 @@ static void cpu_pci_domain_set_resources(device_t dev)
 	ram_resource(dev, idx++, 0, 640);
 	ram_resource(dev, idx++, 768, tolmk - 768);
 
-	/* Leave some space for ACPI, PIRQ and MP tables */
-	high_tables_base = (tomk * 1024) - HIGH_MEMORY_SIZE;
-	high_tables_size = HIGH_MEMORY_SIZE;
+	set_top_of_ram(tomk * 1024);
 
 	assign_resources(dev->link_list);
 }
diff --git a/src/northbridge/via/cn400/northbridge.c b/src/northbridge/via/cn400/northbridge.c
index 6e01dbb3a3..149eab37f9 100644
--- a/src/northbridge/via/cn400/northbridge.c
+++ b/src/northbridge/via/cn400/northbridge.c
@@ -204,10 +204,7 @@ static void cn400_domain_set_resources(device_t dev)
 		}
 
 		/* Locate the High Tables at the Top of Low Memory below the Video RAM */
-		high_tables_base = ((tolmk - (CONFIG_VIDEO_MB *1024)) * 1024) - HIGH_MEMORY_SIZE;
-		high_tables_size = HIGH_MEMORY_SIZE;
-		printk(BIOS_SPEW, "tom: %lx, high_tables_base: %llx, high_tables_size: %llx\n",
-						tomk*1024, high_tables_base, high_tables_size);
+		set_top_of_ram((tolmk - (CONFIG_VIDEO_MB *1024)) * 1024);
 
 		/* Report the memory regions. */
 		idx = 10;
diff --git a/src/northbridge/via/cn700/northbridge.c b/src/northbridge/via/cn700/northbridge.c
index a7a64a3ceb..a326baf2b2 100644
--- a/src/northbridge/via/cn700/northbridge.c
+++ b/src/northbridge/via/cn700/northbridge.c
@@ -134,10 +134,7 @@ static void pci_domain_set_resources(device_t dev)
 			tolmk = tomk;
 		}
 
-		high_tables_base = ((tolmk - CONFIG_VIDEO_MB * 1024) * 1024) - HIGH_MEMORY_SIZE;
-		high_tables_size = HIGH_MEMORY_SIZE;
-		printk(BIOS_DEBUG, "tom: %lx, high_tables_base: %llx, high_tables_size: %llx\n",
-						tomk*1024, high_tables_base, high_tables_size);
+		set_top_of_ram((tolmk - CONFIG_VIDEO_MB * 1024) * 1024);
 
 		/* Report the memory regions. */
 		idx = 10;
diff --git a/src/northbridge/via/cx700/northbridge.c b/src/northbridge/via/cx700/northbridge.c
index 0fdc5c5e29..7514ec4acb 100644
--- a/src/northbridge/via/cx700/northbridge.c
+++ b/src/northbridge/via/cx700/northbridge.c
@@ -68,10 +68,7 @@ static void pci_domain_set_resources(device_t dev)
 		tolmk -= 1024;	// TOP 1M SM Memory
 	}
 
-	high_tables_base = (tolmk * 1024) - HIGH_MEMORY_SIZE;
-	high_tables_size = HIGH_MEMORY_SIZE;
-	printk(BIOS_DEBUG, "tom: %lx, high_tables_base: %llx, high_tables_size: %llx\n",
-						tomk*1024, high_tables_base, high_tables_size);
+	set_top_of_ram(tolmk * 1024);
 
 	/* Report the memory regions */
 	idx = 10;
diff --git a/src/northbridge/via/vt8601/northbridge.c b/src/northbridge/via/vt8601/northbridge.c
index 77dd9fb25d..bed434da2f 100644
--- a/src/northbridge/via/vt8601/northbridge.c
+++ b/src/northbridge/via/vt8601/northbridge.c
@@ -84,10 +84,7 @@ static void pci_domain_set_resources(device_t dev)
 			tolmk = tomk;
 		}
 
-		high_tables_base = (tolmk * 1024) - HIGH_MEMORY_SIZE;
-		high_tables_size = HIGH_MEMORY_SIZE;
-		printk(BIOS_DEBUG, "tom: %lx, high_tables_base: %llx, high_tables_size: %llx\n",
-				tomk*1024, high_tables_base, high_tables_size);
+		set_top_of_ram(tolmk * 1024);
 
 		/* Report the memory regions */
 		idx = 10;
diff --git a/src/northbridge/via/vt8623/northbridge.c b/src/northbridge/via/vt8623/northbridge.c
index e70035c3f1..6e0f4ea802 100644
--- a/src/northbridge/via/vt8623/northbridge.c
+++ b/src/northbridge/via/vt8623/northbridge.c
@@ -143,10 +143,7 @@ static void pci_domain_set_resources(device_t dev)
 			tolmk = tomk;
 		}
 
-		high_tables_base = (tolmk * 1024) - HIGH_MEMORY_SIZE;
-		high_tables_size = HIGH_MEMORY_SIZE;
-		printk(BIOS_DEBUG, "tom: %lx, high_tables_base: %llx, high_tables_size: %llx\n",
-						tomk*1024, high_tables_base, high_tables_size);
+		set_top_of_ram(tolmk * 1024);
 
 		/* Report the memory regions */
 		idx = 10;
diff --git a/src/northbridge/via/vx900/northbridge.c b/src/northbridge/via/vx900/northbridge.c
index 854e17588a..25e6045b42 100644
--- a/src/northbridge/via/vx900/northbridge.c
+++ b/src/northbridge/via/vx900/northbridge.c
@@ -266,11 +266,7 @@ static void vx900_set_resources(device_t dev)
 	u64 tor = vx900_remap_above_4g(mcu, pci_tolm);
 	ram_resource(dev, idx++, RAM_4GB >> 10, (tor - RAM_4GB) >> 10);
 
-	/* Leave some space for ACPI, PIRQ and MP tables */
-	high_tables_base = (tolmk << 10) - HIGH_MEMORY_SIZE;
-	high_tables_size = HIGH_MEMORY_SIZE;
-	printk(BIOS_DEBUG, "high_tables_base: %08llx, size %lld\n",
-	       high_tables_base, high_tables_size);
+	set_top_of_ram(tolmk << 10);
 
 	print_debug("======================================================\n");
 	assign_resources(dev->link_list);