diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c
index 5f387ee5b5c5..d558287c6133 100644
--- a/arch/alpha/kernel/pci.c
+++ b/arch/alpha/kernel/pci.c
@@ -312,8 +312,9 @@ common_init_pci(void)
 {
 	struct pci_controller *hose;
 	struct list_head resources;
+	struct pci_host_bridge *bridge;
 	struct pci_bus *bus;
-	int next_busno;
+	int ret, next_busno;
 	int need_domain_info = 0;
 	u32 pci_mem_end;
 	u32 sg_base;
@@ -336,11 +337,25 @@ common_init_pci(void)
 		pci_add_resource_offset(&resources, hose->mem_space,
 					hose->mem_space->start);
 
-		bus = pci_scan_root_bus(NULL, next_busno, alpha_mv.pci_ops,
-					hose, &resources);
-		if (!bus)
+		bridge = pci_alloc_host_bridge(0);
+		if (!bridge)
 			continue;
-		hose->bus = bus;
+
+		list_splice_init(&resources, &bridge->windows);
+		bridge->dev.parent = NULL;
+		bridge->sysdata = hose;
+		bridge->busnr = next_busno;
+		bridge->ops = alpha_mv.pci_ops;
+		bridge->swizzle_irq = alpha_mv.pci_swizzle;
+		bridge->map_irq = alpha_mv.pci_map_irq;
+
+		ret = pci_scan_root_bus_bridge(bridge);
+		if (ret) {
+			pci_free_host_bridge(bridge);
+			continue;
+		}
+
+		bus = hose->bus = bridge->bus;
 		hose->need_domain_info = need_domain_info;
 		next_busno = bus->busn_res.end + 1;
 		/* Don't allow 8-bit bus number overflow inside the hose -
@@ -354,7 +369,6 @@ common_init_pci(void)
 	pcibios_claim_console_setup();
 
 	pci_assign_unassigned_resources();
-	pci_fixup_irqs(alpha_mv.pci_swizzle, alpha_mv.pci_map_irq);
 	for (hose = hose_head; hose; hose = hose->next) {
 		bus = hose->bus;
 		if (bus)
@@ -362,7 +376,6 @@ common_init_pci(void)
 	}
 }
 
-
 struct pci_controller * __init
 alloc_pci_controller(void)
 {
diff --git a/arch/alpha/kernel/sys_nautilus.c b/arch/alpha/kernel/sys_nautilus.c
index 2cfaa0e5c577..8ae04a121186 100644
--- a/arch/alpha/kernel/sys_nautilus.c
+++ b/arch/alpha/kernel/sys_nautilus.c
@@ -194,22 +194,46 @@ static struct resource irongate_mem = {
 	.name	= "Irongate PCI MEM",
 	.flags	= IORESOURCE_MEM,
 };
+static struct resource busn_resource = {
+	.name	= "PCI busn",
+	.start	= 0,
+	.end	= 255,
+	.flags	= IORESOURCE_BUS,
+};
 
 void __init
 nautilus_init_pci(void)
 {
 	struct pci_controller *hose = hose_head;
+	struct pci_host_bridge *bridge;
 	struct pci_bus *bus;
 	struct pci_dev *irongate;
 	unsigned long bus_align, bus_size, pci_mem;
 	unsigned long memtop = max_low_pfn << PAGE_SHIFT;
+	int ret;
 
-	/* Scan our single hose.  */
-	bus = pci_scan_bus(0, alpha_mv.pci_ops, hose);
-	if (!bus)
+	bridge = pci_alloc_host_bridge(0);
+	if (!bridge)
 		return;
 
-	hose->bus = bus;
+	pci_add_resource(&bridge->windows, &ioport_resource);
+	pci_add_resource(&bridge->windows, &iomem_resource);
+	pci_add_resource(&bridge->windows, &busn_resource);
+	bridge->dev.parent = NULL;
+	bridge->sysdata = hose;
+	bridge->busnr = 0;
+	bridge->ops = alpha_mv.pci_ops;
+	bridge->swizzle_irq = alpha_mv.pci_swizzle;
+	bridge->map_irq = alpha_mv.pci_map_irq;
+
+	/* Scan our single hose.  */
+	ret = pci_scan_root_bus_bridge(bridge);
+	if (ret) {
+		pci_free_host_bridge(bridge);
+		return;
+	}
+
+	bus = hose->bus = bridge->bus;
 	pcibios_claim_one_bus(bus);
 
 	irongate = pci_get_bus_and_slot(0, 0);
@@ -254,7 +278,6 @@ nautilus_init_pci(void)
 	/* pci_common_swizzle() relies on bus->self being NULL
 	   for the root bus, so just clear it. */
 	bus->self = NULL;
-	pci_fixup_irqs(alpha_mv.pci_swizzle, alpha_mv.pci_map_irq);
 	pci_bus_add_devices(bus);
 }