Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6

* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6: (28 commits)
  PCI: make arch/i386/pci/common.c:pci_bf_sort static
  PCI: ibmphp_pci.c: fix NULL dereference
  pciehp: remove unnecessary pci_disable_msi
  pciehp: remove unnecessary free_irq
  PCI: rpaphp: change device tree examination
  PCI: Change memory allocation for acpiphp slots
  i2c-i801: SMBus patch for Intel ICH9
  PCI: irq: irq and pci_ids patch for Intel ICH9
  PCI: pci_{enable,disable}_device() nestable ports
  PCI: switch pci_{enable,disable}_device() to be nestable
  PCI: arch/i386/kernel/pci-dma.c: ioremap balanced with iounmap
  pci/i386: style cleanups
  PCI: Block on access to temporarily unavailable pci device
  pci: fix __pci_register_driver error handling
  pci: clear osc support flags if no _OSC method
  acpiphp: fix missing acpiphp_glue_exit()
  acpiphp: fix use of list_for_each macro
  Altix: Initial ACPI support - ROM shadowing.
  Altix: SN ACPI hotplug support.
  Altix: Add initial ACPI IO support
  ...

17 files changed, 1055 insertions, 700 deletions

diff --git a/arch/i386/kernel/pci-dma.c b/arch/i386/kernel/pci-dma.c
index 25fe6685393..5c8c6ef1fc5 100644
--- a/arch/i386/kernel/pci-dma.c
+++ b/arch/i386/kernel/pci-dma.c
@@ -75,7 +75,7 @@ EXPORT_SYMBOL(dma_free_coherent);
 int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
 				dma_addr_t device_addr, size_t size, int flags)
 {
-	void __iomem *mem_base;
+	void __iomem *mem_base = NULL;
 	int pages = size >> PAGE_SHIFT;
 	int bitmap_size = (pages + 31)/32;
 
@@ -114,6 +114,8 @@ int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
  free1_out:
 	kfree(dev->dma_mem->bitmap);
  out:
+	if (mem_base)
+		iounmap(mem_base);
 	return 0;
 }
 EXPORT_SYMBOL(dma_declare_coherent_memory);
diff --git a/arch/i386/pci/common.c b/arch/i386/pci/common.c
index cdfcf971098..53ca6e89798 100644
--- a/arch/i386/pci/common.c
+++ b/arch/i386/pci/common.c
@@ -20,7 +20,7 @@
 unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 |
 				PCI_PROBE_MMCONF;
 
-int pci_bf_sort;
+static int pci_bf_sort;
 int pci_routeirq;
 int pcibios_last_bus = -1;
 unsigned long pirq_table_addr;
diff --git a/arch/i386/pci/fixup.c b/arch/i386/pci/fixup.c
index c1949ff38d6..cde1170b01a 100644
--- a/arch/i386/pci/fixup.c
+++ b/arch/i386/pci/fixup.c
@@ -74,52 +74,6 @@ static void __devinit  pci_fixup_ncr53c810(struct pci_dev *d)
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C810, pci_fixup_ncr53c810);
 
-static void __devinit pci_fixup_ide_bases(struct pci_dev *d)
-{
-	int i;
-
-	/*
-	 * PCI IDE controllers use non-standard I/O port decoding, respect it.
-	 */
-	if ((d->class >> 8) != PCI_CLASS_STORAGE_IDE)
-		return;
-	DBG("PCI: IDE base address fixup for %s\n", pci_name(d));
-	for(i=0; i<4; i++) {
-		struct resource *r = &d->resource[i];
-		if ((r->start & ~0x80) == 0x374) {
-			r->start |= 2;
-			r->end = r->start;
-		}
-	}
-}
-DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_ide_bases);
-
-static void __devinit  pci_fixup_ide_trash(struct pci_dev *d)
-{
-	int i;
-
-	/*
-	 * Runs the fixup only for the first IDE controller
-	 * (Shai Fultheim - shai@ftcon.com)
-	 */
-	static int called = 0;
-	if (called)
-		return;
-	called = 1;
-
-	/*
-	 * There exist PCI IDE controllers which have utter garbage
-	 * in first four base registers. Ignore that.
-	 */
-	DBG("PCI: IDE base address trash cleared for %s\n", pci_name(d));
-	for(i=0; i<4; i++)
-		d->resource[i].start = d->resource[i].end = d->resource[i].flags = 0;
-}
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5513, pci_fixup_ide_trash);
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_10, pci_fixup_ide_trash);
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_11, pci_fixup_ide_trash);
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_9, pci_fixup_ide_trash);
-
 static void __devinit  pci_fixup_latency(struct pci_dev *d)
 {
 	/*
diff --git a/arch/i386/pci/i386.c b/arch/i386/pci/i386.c
index 98580292f0d..43005f04442 100644
--- a/arch/i386/pci/i386.c
+++ b/arch/i386/pci/i386.c
@@ -104,16 +104,24 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
 	/* Depth-First Search on bus tree */
 	list_for_each_entry(bus, bus_list, node) {
 		if ((dev = bus->self)) {
-			for (idx = PCI_BRIDGE_RESOURCES; idx < PCI_NUM_RESOURCES; idx++) {
+			for (idx = PCI_BRIDGE_RESOURCES;
+			    idx < PCI_NUM_RESOURCES; idx++) {
 				r = &dev->resource[idx];
 				if (!r->flags)
 					continue;
 				pr = pci_find_parent_resource(dev, r);
-				if (!r->start || !pr || request_resource(pr, r) < 0) {
-					printk(KERN_ERR "PCI: Cannot allocate resource region %d of bridge %s\n", idx, pci_name(dev));
-					/* Something is wrong with the region.
-					   Invalidate the resource to prevent child
-					   resource allocations in this range. */
+				if (!r->start || !pr ||
+				    request_resource(pr, r) < 0) {
+					printk(KERN_ERR "PCI: Cannot allocate "
+						"resource region %d "
+						"of bridge %s\n",
+						idx, pci_name(dev));
+					/*
+					 * Something is wrong with the region.
+					 * Invalidate the resource to prevent
+					 * child resource allocations in this
+					 * range.
+					 */
 					r->flags = 0;
 				}
 			}
@@ -131,7 +139,7 @@ static void __init pcibios_allocate_resources(int pass)
 
 	for_each_pci_dev(dev) {
 		pci_read_config_word(dev, PCI_COMMAND, &command);
-		for(idx = 0; idx < 6; idx++) {
+		for (idx = 0; idx < PCI_ROM_RESOURCE; idx++) {
 			r = &dev->resource[idx];
 			if (r->parent)		/* Already allocated */
 				continue;
@@ -142,11 +150,15 @@ static void __init pcibios_allocate_resources(int pass)
 			else
 				disabled = !(command & PCI_COMMAND_MEMORY);
 			if (pass == disabled) {
-				DBG("PCI: Resource %08lx-%08lx (f=%lx, d=%d, p=%d)\n",
+				DBG("PCI: Resource %08lx-%08lx "
+				    "(f=%lx, d=%d, p=%d)\n",
 				    r->start, r->end, r->flags, disabled, pass);
 				pr = pci_find_parent_resource(dev, r);
 				if (!pr || request_resource(pr, r) < 0) {
-					printk(KERN_ERR "PCI: Cannot allocate resource region %d of device %s\n", idx, pci_name(dev));
+					printk(KERN_ERR "PCI: Cannot allocate "
+						"resource region %d "
+						"of device %s\n",
+						idx, pci_name(dev));
 					/* We'll assign a new address later */
 					r->end -= r->start;
 					r->start = 0;
@@ -156,12 +168,16 @@ static void __init pcibios_allocate_resources(int pass)
 		if (!pass) {
 			r = &dev->resource[PCI_ROM_RESOURCE];
 			if (r->flags & IORESOURCE_ROM_ENABLE) {
-				/* Turn the ROM off, leave the resource region, but keep it unregistered. */
+				/* Turn the ROM off, leave the resource region,
+				 * but keep it unregistered. */
 				u32 reg;
-				DBG("PCI: Switching off ROM of %s\n", pci_name(dev));
+				DBG("PCI: Switching off ROM of %s\n",
+					pci_name(dev));
 				r->flags &= ~IORESOURCE_ROM_ENABLE;
-				pci_read_config_dword(dev, dev->rom_base_reg, &reg);
-				pci_write_config_dword(dev, dev->rom_base_reg, reg & ~PCI_ROM_ADDRESS_ENABLE);
+				pci_read_config_dword(dev,
+						dev->rom_base_reg, &reg);
+				pci_write_config_dword(dev, dev->rom_base_reg,
+						reg & ~PCI_ROM_ADDRESS_ENABLE);
 			}
 		}
 	}
@@ -173,9 +189,11 @@ static int __init pcibios_assign_resources(void)
 	struct resource *r, *pr;
 
 	if (!(pci_probe & PCI_ASSIGN_ROMS)) {
-		/* Try to use BIOS settings for ROMs, otherwise let
-		   pci_assign_unassigned_resources() allocate the new
-		   addresses. */
+		/*
+		 * Try to use BIOS settings for ROMs, otherwise let
+		 * pci_assign_unassigned_resources() allocate the new
+		 * addresses.
+		 */
 		for_each_pci_dev(dev) {
 			r = &dev->resource[PCI_ROM_RESOURCE];
 			if (!r->flags || !r->start)
@@ -215,9 +233,9 @@ int pcibios_enable_resources(struct pci_dev *dev, int mask)
 
 	pci_read_config_word(dev, PCI_COMMAND, &cmd);
 	old_cmd = cmd;
-	for(idx = 0; idx < PCI_NUM_RESOURCES; idx++) {
+	for (idx = 0; idx < PCI_NUM_RESOURCES; idx++) {
 		/* Only set up the requested stuff */
-		if (!(mask & (1<<idx)))
+		if (!(mask & (1 << idx)))
 			continue;
 
 		r = &dev->resource[idx];
@@ -227,7 +245,9 @@ int pcibios_enable_resources(struct pci_dev *dev, int mask)
 				(!(r->flags & IORESOURCE_ROM_ENABLE)))
 			continue;
 		if (!r->start && r->end) {
-			printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev));
+			printk(KERN_ERR "PCI: Device %s not available "
+				"because of resource collisions\n",
+				pci_name(dev));
 			return -EINVAL;
 		}
 		if (r->flags & IORESOURCE_IO)
@@ -236,7 +256,8 @@ int pcibios_enable_resources(struct pci_dev *dev, int mask)
 			cmd |= PCI_COMMAND_MEMORY;
 	}
 	if (cmd != old_cmd) {
-		printk("PCI: Enabling device %s (%04x -> %04x)\n", pci_name(dev), old_cmd, cmd);
+		printk("PCI: Enabling device %s (%04x -> %04x)\n",
+			pci_name(dev), old_cmd, cmd);
 		pci_write_config_word(dev, PCI_COMMAND, cmd);
 	}
 	return 0;
@@ -258,7 +279,8 @@ void pcibios_set_master(struct pci_dev *dev)
 		lat = pcibios_max_latency;
 	else
 		return;
-	printk(KERN_DEBUG "PCI: Setting latency timer of device %s to %d\n", pci_name(dev), lat);
+	printk(KERN_DEBUG "PCI: Setting latency timer of device %s to %d\n",
+		pci_name(dev), lat);
 	pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
 }
 
diff --git a/arch/i386/pci/irq.c b/arch/i386/pci/irq.c
index 69163998ade..e65551cd821 100644
--- a/arch/i386/pci/irq.c
+++ b/arch/i386/pci/irq.c
@@ -543,6 +543,12 @@ static __init int intel_router_probe(struct irq_router *r, struct pci_dev *route
 		case PCI_DEVICE_ID_INTEL_ICH8_2:
 		case PCI_DEVICE_ID_INTEL_ICH8_3:
 		case PCI_DEVICE_ID_INTEL_ICH8_4:
+		case PCI_DEVICE_ID_INTEL_ICH9_0:
+		case PCI_DEVICE_ID_INTEL_ICH9_1:
+		case PCI_DEVICE_ID_INTEL_ICH9_2:
+		case PCI_DEVICE_ID_INTEL_ICH9_3:
+		case PCI_DEVICE_ID_INTEL_ICH9_4:
+		case PCI_DEVICE_ID_INTEL_ICH9_5:
 			r->name = "PIIX/ICH";
 			r->get = pirq_piix_get;
 			r->set = pirq_piix_set;
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index b30be7c48ba..f4edfbf2713 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -469,10 +469,11 @@ pcibios_fixup_resources(struct pci_dev *dev, int start, int limit)
 	}
 }
 
-static void __devinit pcibios_fixup_device_resources(struct pci_dev *dev)
+void __devinit pcibios_fixup_device_resources(struct pci_dev *dev)
 {
 	pcibios_fixup_resources(dev, 0, PCI_BRIDGE_RESOURCES);
 }
+EXPORT_SYMBOL_GPL(pcibios_fixup_device_resources);
 
 static void __devinit pcibios_fixup_bridge_resources(struct pci_dev *dev)
 {
@@ -493,6 +494,7 @@ pcibios_fixup_bus (struct pci_bus *b)
 	}
 	list_for_each_entry(dev, &b->devices, bus_list)
 		pcibios_fixup_device_resources(dev);
+	platform_pci_fixup_bus(b);
 
 	return;
 }
@@ -738,75 +740,44 @@ int ia64_pci_legacy_write(struct pci_bus *bus, u16 port, u32 val, u8 size)
 	return ret;
 }
 
+/* It's defined in drivers/pci/pci.c */
+extern u8 pci_cache_line_size;
+
 /**
- * pci_cacheline_size - determine cacheline size for PCI devices
- * @dev: void
+ * set_pci_cacheline_size - determine cacheline size for PCI devices
  *
  * We want to use the line-size of the outer-most cache.  We assume
  * that this line-size is the same for all CPUs.
  *
  * Code mostly taken from arch/ia64/kernel/palinfo.c:cache_info().
- *
- * RETURNS: An appropriate -ERRNO error value on eror, or zero for success.
  */
-static unsigned long
-pci_cacheline_size (void)
+static void __init set_pci_cacheline_size(void)
 {
 	u64 levels, unique_caches;
 	s64 status;
 	pal_cache_config_info_t cci;
-	static u8 cacheline_size;
-
-	if (cacheline_size)
-		return cacheline_size;
 
 	status = ia64_pal_cache_summary(&levels, &unique_caches);
 	if (status != 0) {
-		printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n",
-		       __FUNCTION__, status);
-		return SMP_CACHE_BYTES;
+		printk(KERN_ERR "%s: ia64_pal_cache_summary() failed "
+			"(status=%ld)\n", __FUNCTION__, status);
+		return;
 	}
 
-	status = ia64_pal_cache_config_info(levels - 1, /* cache_type (data_or_unified)= */ 2,
-					    &cci);
+	status = ia64_pal_cache_config_info(levels - 1,
+				/* cache_type (data_or_unified)= */ 2, &cci);
 	if (status != 0) {
-		printk(KERN_ERR "%s: ia64_pal_cache_config_info() failed (status=%ld)\n",
-		       __FUNCTION__, status);
-		return SMP_CACHE_BYTES;
+		printk(KERN_ERR "%s: ia64_pal_cache_config_info() failed "
+			"(status=%ld)\n", __FUNCTION__, status);
+		return;
 	}
-	cacheline_size = 1 << cci.pcci_line_size;
-	return cacheline_size;
+	pci_cache_line_size = (1 << cci.pcci_line_size) / 4;
 }
 
-/**
- * pcibios_prep_mwi - helper function for drivers/pci/pci.c:pci_set_mwi()
- * @dev: the PCI device for which MWI is enabled
- *
- * For ia64, we can get the cacheline sizes from PAL.
- *
- * RETURNS: An appropriate -ERRNO error value on eror, or zero for success.
- */
-int
-pcibios_prep_mwi (struct pci_dev *dev)
-{
-	unsigned long desired_linesize, current_linesize;
-	int rc = 0;
-	u8 pci_linesize;
-
-	desired_linesize = pci_cacheline_size();
-
-	pci_read_config_byte(dev, PCI_CACHE_LINE_SIZE, &pci_linesize);
-	current_linesize = 4 * pci_linesize;
-	if (desired_linesize != current_linesize) {
-		printk(KERN_WARNING "PCI: slot %s has incorrect PCI cache line size of %lu bytes,",
-		       pci_name(dev), current_linesize);
-		if (current_linesize > desired_linesize) {
-			printk(" expected %lu bytes instead\n", desired_linesize);
-			rc = -EINVAL;
-		} else {
-			printk(" correcting to %lu\n", desired_linesize);
-			pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, desired_linesize / 4);
-		}
-	}
-	return rc;
+static int __init pcibios_init(void)
+{
+	set_pci_cacheline_size();
+	return 0;
 }
+
+subsys_initcall(pcibios_init);
diff --git a/arch/ia64/sn/kernel/Makefile b/arch/ia64/sn/kernel/Makefile
index 2d78f34dd76..0a59371d347 100644
--- a/arch/ia64/sn/kernel/Makefile
+++ b/arch/ia64/sn/kernel/Makefile
@@ -4,13 +4,14 @@
 # License.  See the file "COPYING" in the main directory of this archive
 # for more details.
 #
-# Copyright (C) 1999,2001-2005 Silicon Graphics, Inc.  All Rights Reserved.
+# Copyright (C) 1999,2001-2006 Silicon Graphics, Inc.  All Rights Reserved.
 #
 
 CPPFLAGS += -I$(srctree)/arch/ia64/sn/include
 
 obj-y				+= setup.o bte.o bte_error.o irq.o mca.o idle.o \
-				   huberror.o io_init.o iomv.o klconflib.o pio_phys.o \
+				   huberror.o io_acpi_init.o io_common.o \
+				   io_init.o iomv.o klconflib.o pio_phys.o \
 				   sn2/
 obj-$(CONFIG_IA64_GENERIC)      += machvec.o
 obj-$(CONFIG_SGI_TIOCX)		+= tiocx.o
diff --git a/arch/ia64/sn/kernel/io_acpi_init.c b/arch/ia64/sn/kernel/io_acpi_init.c
new file mode 100644
index 00000000000..99d7f278612
--- /dev/null
+++ b/arch/ia64/sn/kernel/io_acpi_init.c
@@ -0,0 +1,231 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2006 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <asm/sn/types.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/pcidev.h>
+#include <asm/sn/pcibus_provider_defs.h>
+#include <asm/sn/sn_sal.h>
+#include "xtalk/hubdev.h"
+#include <linux/acpi.h>
+
+
+/*
+ * The code in this file will only be executed when running with
+ * a PROM that has ACPI IO support. (i.e., SN_ACPI_BASE_SUPPORT() == 1)
+ */
+
+
+/*
+ * This value must match the UUID the PROM uses
+ * (io/acpi/defblk.c) when building a vendor descriptor.
+ */
+struct acpi_vendor_uuid sn_uuid = {
+	.subtype = 0,
+	.data	= { 0x2c, 0xc6, 0xa6, 0xfe, 0x9c, 0x44, 0xda, 0x11,
+		    0xa2, 0x7c, 0x08, 0x00, 0x69, 0x13, 0xea, 0x51 },
+};
+
+/*
+ * Perform the early IO init in PROM.
+ */
+static s64
+sal_ioif_init(u64 *result)
+{
+	struct ia64_sal_retval isrv = {0,0,0,0};
+
+	SAL_CALL_NOLOCK(isrv,
+			SN_SAL_IOIF_INIT, 0, 0, 0, 0, 0, 0, 0);
+	*result = isrv.v0;
+	return isrv.status;
+}
+
+/*
+ * sn_hubdev_add - The 'add' function of the acpi_sn_hubdev_driver.
+ *		   Called for every "SGIHUB" or "SGITIO" device defined
+ *		   in the ACPI namespace.
+ */
+static int __init
+sn_hubdev_add(struct acpi_device *device)
+{
+	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+	u64 addr;
+	struct hubdev_info *hubdev;
+	struct hubdev_info *hubdev_ptr;
+	int i;
+	u64 nasid;
+	struct acpi_resource *resource;
+	int ret = 0;
+	acpi_status status;
+	struct acpi_resource_vendor_typed *vendor;
+	extern void sn_common_hubdev_init(struct hubdev_info *);
+
+	status = acpi_get_vendor_resource(device->handle, METHOD_NAME__CRS,
+					  &sn_uuid, &buffer);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR
+		       "sn_hubdev_add: acpi_get_vendor_resource() failed: %d\n",
+		        status);
+		return 1;
+	}
+
+	resource = buffer.pointer;
+	vendor = &resource->data.vendor_typed;
+	if ((vendor->byte_length - sizeof(struct acpi_vendor_uuid)) !=
+	    sizeof(struct hubdev_info *)) {
+		printk(KERN_ERR
+		       "sn_hubdev_add: Invalid vendor data length: %d\n",
+		        vendor->byte_length);
+		ret = 1;
+		goto exit;
+	}
+
+	memcpy(&addr, vendor->byte_data, sizeof(struct hubdev_info *));
+	hubdev_ptr = __va((struct hubdev_info *) addr);
+
+	nasid = hubdev_ptr->hdi_nasid;
+	i = nasid_to_cnodeid(nasid);
+	hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
+	*hubdev = *hubdev_ptr;
+	sn_common_hubdev_init(hubdev);
+
+exit:
+	kfree(buffer.pointer);
+	return ret;
+}
+
+/*
+ * sn_get_bussoft_ptr() - The pcibus_bussoft pointer is found in
+ *			  the ACPI Vendor resource for this bus.
+ */
+static struct pcibus_bussoft *
+sn_get_bussoft_ptr(struct pci_bus *bus)
+{
+	u64 addr;
+	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+	acpi_handle handle;
+	struct pcibus_bussoft *prom_bussoft_ptr;
+	struct acpi_resource *resource;
+	acpi_status status;
+	struct acpi_resource_vendor_typed *vendor;
+
+
+	handle = PCI_CONTROLLER(bus)->acpi_handle;
+	status = acpi_get_vendor_resource(handle, METHOD_NAME__CRS,
+					  &sn_uuid, &buffer);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR "get_acpi_pcibus_ptr: "
+		       "get_acpi_bussoft_info() failed: %d\n",
+		       status);
+		return NULL;
+	}
+	resource = buffer.pointer;
+	vendor = &resource->data.vendor_typed;
+
+	if ((vendor->byte_length - sizeof(struct acpi_vendor_uuid)) !=
+	     sizeof(struct pcibus_bussoft *)) {
+		printk(KERN_ERR
+		       "get_acpi_bussoft_ptr: Invalid vendor data "
+		       "length %d\n", vendor->byte_length);
+		kfree(buffer.pointer);
+		return NULL;
+	}
+	memcpy(&addr, vendor->byte_data, sizeof(struct pcibus_bussoft *));
+	prom_bussoft_ptr = __va((struct pcibus_bussoft *) addr);
+	kfree(buffer.pointer);
+
+	return prom_bussoft_ptr;
+}
+
+/*
+ * sn_acpi_bus_fixup
+ */
+void
+sn_acpi_bus_fixup(struct pci_bus *bus)
+{
+	struct pci_dev *pci_dev = NULL;
+	struct pcibus_bussoft *prom_bussoft_ptr;
+	extern void sn_common_bus_fixup(struct pci_bus *,
+					struct pcibus_bussoft *);
+
+	if (!bus->parent) {	/* If root bus */
+		prom_bussoft_ptr = sn_get_bussoft_ptr(bus);
+		if (prom_bussoft_ptr == NULL) {
+			printk(KERN_ERR
+			       "sn_pci_fixup_bus: 0x%04x:0x%02x Unable to "
+			       "obtain prom_bussoft_ptr\n",
+			       pci_domain_nr(bus), bus->number);
+			return;
+		}
+		sn_common_bus_fixup(bus, prom_bussoft_ptr);
+	}
+	list_for_each_entry(pci_dev, &bus->devices, bus_list) {
+		sn_pci_fixup_slot(pci_dev);
+	}
+}
+
+/*
+ * sn_acpi_slot_fixup - Perform any SN specific slot fixup.
+ *			At present there does not appear to be
+ *			any generic way to handle a ROM image
+ *			that has been shadowed by the PROM, so
+ *			we pass a pointer to it	within the
+ *			pcidev_info structure.
+ */
+
+void
+sn_acpi_slot_fixup(struct pci_dev *dev, struct pcidev_info *pcidev_info)
+{
+	void __iomem *addr;
+	size_t size;
+
+	if (pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE]) {
+		/*
+		 * A valid ROM image exists and has been shadowed by the
+		 * PROM. Setup the pci_dev ROM resource to point to
+		 * the shadowed copy.
+		 */
+		size = dev->resource[PCI_ROM_RESOURCE].end -
+				dev->resource[PCI_ROM_RESOURCE].start;
+		addr =
+		     ioremap(pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE],
+			     size);
+		dev->resource[PCI_ROM_RESOURCE].start = (unsigned long) addr;
+		dev->resource[PCI_ROM_RESOURCE].end =
+						(unsigned long) addr + size;
+		dev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_BIOS_COPY;
+	}
+}
+
+static struct acpi_driver acpi_sn_hubdev_driver = {
+	.name = "SGI HUBDEV Driver",
+	.ids = "SGIHUB,SGITIO",
+	.ops = {
+		.add = sn_hubdev_add,
+		},
+};
+
+
+/*
+ * sn_io_acpi_init - PROM has ACPI support for IO, defining at a minimum the
+ *		     nodes and root buses in the DSDT. As a result, bus scanning
+ *		     will be initiated by the Linux ACPI code.
+ */
+
+void __init
+sn_io_acpi_init(void)
+{
+	u64 result;
+	s64 status;
+
+	acpi_bus_register_driver(&acpi_sn_hubdev_driver);
+	status = sal_ioif_init(&result);
+	if (status || result)
+		panic("sal_ioif_init failed: [%lx] %s\n",
+		      status, ia64_sal_strerror(status));
+}
diff --git a/arch/ia64/sn/kernel/io_common.c b/arch/ia64/sn/kernel/io_common.c
new file mode 100644
index 00000000000..d4dd8f4b6b8
--- /dev/null
+++ b/arch/ia64/sn/kernel/io_common.c
@@ -0,0 +1,613 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2006 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <linux/bootmem.h>
+#include <asm/sn/types.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/sn_feature_sets.h>
+#include <asm/sn/geo.h>
+#include <asm/sn/io.h>
+#include <asm/sn/l1.h>
+#include <asm/sn/module.h>
+#include <asm/sn/pcibr_provider.h>
+#include <asm/sn/pcibus_provider_defs.h>
+#include <asm/sn/pcidev.h>
+#include <asm/sn/simulator.h>
+#include <asm/sn/sn_sal.h>
+#include <asm/sn/tioca_provider.h>
+#include <asm/sn/tioce_provider.h>
+#include "xtalk/hubdev.h"
+#include "xtalk/xwidgetdev.h"
+#include <linux/acpi.h>
+#include <asm/sn/sn2/sn_hwperf.h>
+#include <asm/sn/acpi.h>
+
+extern void sn_init_cpei_timer(void);
+extern void register_sn_procfs(void);
+extern void sn_acpi_bus_fixup(struct pci_bus *);
+extern void sn_bus_fixup(struct pci_bus *);
+extern void sn_acpi_slot_fixup(struct pci_dev *, struct pcidev_info *);
+extern void sn_more_slot_fixup(struct pci_dev *, struct pcidev_info *);
+extern void sn_legacy_pci_window_fixup(struct pci_controller *, u64, u64);
+extern void sn_io_acpi_init(void);
+extern void sn_io_init(void);
+
+
+static struct list_head sn_sysdata_list;
+
+/* sysdata list struct */
+struct sysdata_el {
+	struct list_head entry;
+	void *sysdata;
+};
+
+int sn_ioif_inited;		/* SN I/O infrastructure initialized? */
+
+struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];	/* indexed by asic type */
+
+/*
+ * Hooks and struct for unsupported pci providers
+ */
+
+static dma_addr_t
+sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size, int type)
+{
+	return 0;
+}
+
+static void
+sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
+{
+	return;
+}
+
+static void *
+sn_default_pci_bus_fixup(struct pcibus_bussoft *soft, struct pci_controller *controller)
+{
+	return NULL;
+}
+
+static struct sn_pcibus_provider sn_pci_default_provider = {
+	.dma_map = sn_default_pci_map,
+	.dma_map_consistent = sn_default_pci_map,
+	.dma_unmap = sn_default_pci_unmap,
+	.bus_fixup = sn_default_pci_bus_fixup,
+};
+
+/*
+ * Retrieve the DMA Flush List given nasid, widget, and device.
+ * This list is needed to implement the WAR - Flush DMA data on PIO Reads.
+ */
+static inline u64
+sal_get_device_dmaflush_list(u64 nasid, u64 widget_num, u64 device_num,
+			     u64 address)
+{
+	struct ia64_sal_retval ret_stuff;
+	ret_stuff.status = 0;
+	ret_stuff.v0 = 0;
+
+	SAL_CALL_NOLOCK(ret_stuff,
+			(u64) SN_SAL_IOIF_GET_DEVICE_DMAFLUSH_LIST,
+			(u64) nasid, (u64) widget_num,
+			(u64) device_num, (u64) address, 0, 0, 0);
+	return ret_stuff.status;
+}
+
+/*
+ * Retrieve the pci device information given the bus and device|function number.
+ */
+static inline u64
+sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
+		    u64 sn_irq_info)
+{
+	struct ia64_sal_retval ret_stuff;
+	ret_stuff.status = 0;
+	ret_stuff.v0 = 0;
+
+	SAL_CALL_NOLOCK(ret_stuff,
+			(u64) SN_SAL_IOIF_GET_PCIDEV_INFO,
+			(u64) segment, (u64) bus_number, (u64) devfn,
+			(u64) pci_dev,
+			sn_irq_info, 0, 0);
+	return ret_stuff.v0;
+}
+
+/*
+ * sn_pcidev_info_get() - Retrieve the pcidev_info struct for the specified
+ *			  device.
+ */
+inline struct pcidev_info *
+sn_pcidev_info_get(struct pci_dev *dev)
+{
+	struct pcidev_info *pcidev;
+
+	list_for_each_entry(pcidev,
+			    &(SN_PLATFORM_DATA(dev)->pcidev_info), pdi_list) {
+		if (pcidev->pdi_linux_pcidev == dev)
+			return pcidev;
+	}
+	return NULL;
+}
+
+/* Older PROM flush WAR
+ *
+ * 01/16/06 -- This war will be in place until a new official PROM is released.
+ * Additionally note that the struct sn_flush_device_war also has to be
+ * removed from arch/ia64/sn/include/xtalk/hubdev.h
+ */
+static u8 war_implemented = 0;
+
+static s64 sn_device_fixup_war(u64 nasid, u64 widget, int device,
+			       struct sn_flush_device_common *common)
+{
+	struct sn_flush_device_war *war_list;
+	struct sn_flush_device_war *dev_entry;
+	struct ia64_sal_retval isrv = {0,0,0,0};
+
+	if (!war_implemented) {
+		printk(KERN_WARNING "PROM version < 4.50 -- implementing old "
+		       "PROM flush WAR\n");
+		war_implemented = 1;
+	}
+
+	war_list = kzalloc(DEV_PER_WIDGET * sizeof(*war_list), GFP_KERNEL);
+	if (!war_list)
+		BUG();
+
+	SAL_CALL_NOLOCK(isrv, SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
+			nasid, widget, __pa(war_list), 0, 0, 0 ,0);
+	if (isrv.status)
+		panic("sn_device_fixup_war failed: %s\n",
+		      ia64_sal_strerror(isrv.status));
+
+	dev_entry = war_list + device;
+	memcpy(common,dev_entry, sizeof(*common));
+	kfree(war_list);
+
+	return isrv.status;
+}
+
+/*
+ * sn_common_hubdev_init() - This routine is called to initialize the HUB data
+ *			     structure for each node in the system.
+ */
+void __init
+sn_common_hubdev_init(struct hubdev_info *hubdev)
+{
+
+	struct sn_flush_device_kernel *sn_flush_device_kernel;
+	struct sn_flush_device_kernel *dev_entry;
+	s64 status;
+	int widget, device, size;
+
+	/* Attach the error interrupt handlers */
+	if (hubdev->hdi_nasid & 1)	/* If TIO */
+		ice_error_init(hubdev);
+	else
+		hub_error_init(hubdev);
+
+	for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
+		hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
+
+	if (!hubdev->hdi_flush_nasid_list.widget_p)
+		return;
+
+	size = (HUB_WIDGET_ID_MAX + 1) *
+		sizeof(struct sn_flush_device_kernel *);
+	hubdev->hdi_flush_nasid_list.widget_p =
+		kzalloc(size, GFP_KERNEL);
+	if (!hubdev->hdi_flush_nasid_list.widget_p)
+		BUG();
+
+	for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
+		size = DEV_PER_WIDGET *
+			sizeof(struct sn_flush_device_kernel);
+		sn_flush_device_kernel = kzalloc(size, GFP_KERNEL);
+		if (!sn_flush_device_kernel)
+			BUG();
+
+		dev_entry = sn_flush_device_kernel;
+		for (device = 0; device < DEV_PER_WIDGET;
+		     device++, dev_entry++) {
+			size = sizeof(struct sn_flush_device_common);
+			dev_entry->common = kzalloc(size, GFP_KERNEL);
+			if (!dev_entry->common)
+				BUG();
+			if (sn_prom_feature_available(PRF_DEVICE_FLUSH_LIST))
+				status = sal_get_device_dmaflush_list(
+					     hubdev->hdi_nasid, widget, device,
+					     (u64)(dev_entry->common));
+			else
+				status = sn_device_fixup_war(hubdev->hdi_nasid,
+							     widget, device,
+							     dev_entry->common);
+			if (status != SALRET_OK)
+				panic("SAL call failed: %s\n",
+				      ia64_sal_strerror(status));
+
+			spin_lock_init(&dev_entry->sfdl_flush_lock);
+		}
+
+		if (sn_flush_device_kernel)
+			hubdev->hdi_flush_nasid_list.widget_p[widget] =
+							 sn_flush_device_kernel;
+	}
+}
+
+void sn_pci_unfixup_slot(struct pci_dev *dev)
+{
+	struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
+
+	sn_irq_unfixup(dev);
+	pci_dev_put(host_pci_dev);
+	pci_dev_put(dev);
+}
+
+/*
+ * sn_pci_fixup_slot() - This routine sets up a slot's resources consistent
+ *			 with the Linux PCI abstraction layer. Resources
+ *			 acquired from our PCI provider include PIO maps
+ *			 to BAR space and interrupt objects.
+ */
+void sn_pci_fixup_slot(struct pci_dev *dev)
+{
+	int segment = pci_domain_nr(dev->bus);
+	int status = 0;
+	struct pcibus_bussoft *bs;
+ 	struct pci_bus *host_pci_bus;
+ 	struct pci_dev *host_pci_dev;
+	struct pcidev_info *pcidev_info;
+ 	struct sn_irq_info *sn_irq_info;
+ 	unsigned int bus_no, devfn;
+
+	pci_dev_get(dev); /* for the sysdata pointer */
+	pcidev_info = kzalloc(sizeof(struct pcidev_info), GFP_KERNEL);
+	if (!pcidev_info)
+		BUG();		/* Cannot afford to run out of memory */
+
+	sn_irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
+	if (!sn_irq_info)
+		BUG();		/* Cannot afford to run out of memory */
+
+	/* Call to retrieve pci device information needed by kernel. */
+	status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number,
+				     dev->devfn,
+				     (u64) __pa(pcidev_info),
+				     (u64) __pa(sn_irq_info));
+	if (status)
+		BUG(); /* Cannot get platform pci device information */
+
+	/* Add pcidev_info to list in pci_controller.platform_data */
+	list_add_tail(&pcidev_info->pdi_list,
+		      &(SN_PLATFORM_DATA(dev->bus)->pcidev_info));
+
+	if (SN_ACPI_BASE_SUPPORT())
+		sn_acpi_slot_fixup(dev, pcidev_info);
+	else
+		sn_more_slot_fixup(dev, pcidev_info);
+	/*
+	 * Using the PROMs values for the PCI host bus, get the Linux
+ 	 * PCI host_pci_dev struct and set up host bus linkages
+ 	 */
+
+	bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
+	devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff;
+ 	host_pci_bus = pci_find_bus(segment, bus_no);
+ 	host_pci_dev = pci_get_slot(host_pci_bus, devfn);
+
+	pcidev_info->host_pci_dev = host_pci_dev;
+	pcidev_info->pdi_linux_pcidev = dev;
+	pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev);
+	bs = SN_PCIBUS_BUSSOFT(dev->bus);
+	pcidev_info->pdi_pcibus_info = bs;
+
+	if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
+		SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
+	} else {
+		SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
+	}
+
+	/* Only set up IRQ stuff if this device has a host bus context */
+	if (bs && sn_irq_info->irq_irq) {
+		pcidev_info->pdi_sn_irq_info = sn_irq_info;
+		dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq;
+		sn_irq_fixup(dev, sn_irq_info);
+	} else {
+		pcidev_info->pdi_sn_irq_info = NULL;
+		kfree(sn_irq_info);
+	}
+}
+
+/*
+ * sn_common_bus_fixup - Perform platform specific bus fixup.
+ *			 Execute the ASIC specific fixup routine
+ *			 for this bus.
+ */
+void
+sn_common_bus_fixup(struct pci_bus *bus,
+		    struct pcibus_bussoft *prom_bussoft_ptr)
+{
+	int cnode;
+	struct pci_controller *controller;
+	struct hubdev_info *hubdev_info;
+	int nasid;
+	void *provider_soft;
+	struct sn_pcibus_provider *provider;
+	struct sn_platform_data *sn_platform_data;
+
+	controller = PCI_CONTROLLER(bus);
+	/*
+	 * Per-provider fixup.  Copies the bus soft structure from prom
+	 * to local area and links SN_PCIBUS_BUSSOFT().
+	 */
+
+	if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES) {
+		printk(KERN_WARNING "sn_common_bus_fixup: Unsupported asic type, %d",
+		       prom_bussoft_ptr->bs_asic_type);
+		return;
+	}
+
+	if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
+		return;	/* no further fixup necessary */
+
+	provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
+	if (provider == NULL)
+		panic("sn_common_bus_fixup: No provider registered for this asic type, %d",
+		      prom_bussoft_ptr->bs_asic_type);
+
+	if (provider->bus_fixup)
+		provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr,
+				 controller);
+	else
+		provider_soft = NULL;
+
+	/*
+	 * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
+	 * after this point.
+	 */
+	controller->platform_data = kzalloc(sizeof(struct sn_platform_data),
+					    GFP_KERNEL);
+	if (controller->platform_data == NULL)
+		BUG();
+	sn_platform_data =
+			(struct sn_platform_data *) controller->platform_data;
+	sn_platform_data->provider_soft = provider_soft;
+	INIT_LIST_HEAD(&((struct sn_platform_data *)
+			 controller->platform_data)->pcidev_info);
+	nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
+	cnode = nasid_to_cnodeid(nasid);
+	hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
+	SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
+	    &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
+
+	/*
+	 * If the node information we obtained during the fixup phase is
+	 * invalid then set controller->node to -1 (undetermined)
+	 */
+	if (controller->node >= num_online_nodes()) {
+		struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
+
+		printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u"
+		       "L_IO=%lx L_MEM=%lx BASE=%lx\n",
+		       b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
+		       b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
+		printk(KERN_WARNING "on node %d but only %d nodes online."
+		       "Association set to undetermined.\n",
+		       controller->node, num_online_nodes());
+		controller->node = -1;
+	}
+}
+
+void sn_bus_store_sysdata(struct pci_dev *dev)
+{
+	struct sysdata_el *element;
+
+	element = kzalloc(sizeof(struct sysdata_el), GFP_KERNEL);
+	if (!element) {
+		dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__);
+		return;
+	}
+	element->sysdata = SN_PCIDEV_INFO(dev);
+	list_add(&element->entry, &sn_sysdata_list);
+}
+
+void sn_bus_free_sysdata(void)
+{
+	struct sysdata_el *element;
+	struct list_head *list, *safe;
+
+	list_for_each_safe(list, safe, &sn_sysdata_list) {
+		element = list_entry(list, struct sysdata_el, entry);
+		list_del(&element->entry);
+		list_del(&(((struct pcidev_info *)
+			     (element->sysdata))->pdi_list));
+		kfree(element->sysdata);
+		kfree(element);
+	}
+	return;
+}
+
+/*
+ * hubdev_init_node() - Creates the HUB data structure and link them to it's
+ *			own NODE specific data area.
+ */
+void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
+{
+	struct hubdev_info *hubdev_info;
+	int size;
+	pg_data_t *pg;
+
+	size = sizeof(struct hubdev_info);
+
+	if (node >= num_online_nodes())	/* Headless/memless IO nodes */
+		pg = NODE_DATA(0);
+	else
+		pg = NODE_DATA(node);
+
+	hubdev_info = (struct hubdev_info *)alloc_bootmem_node(pg, size);
+
+	npda->pdinfo = (void *)hubdev_info;
+}
+
+geoid_t
+cnodeid_get_geoid(cnodeid_t cnode)
+{
+	struct hubdev_info *hubdev;
+
+	hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
+	return hubdev->hdi_geoid;
+}
+
+void sn_generate_path(struct pci_bus *pci_bus, char *address)
+{
+	nasid_t nasid;
+	cnodeid_t cnode;
+	geoid_t geoid;
+	moduleid_t moduleid;
+	u16 bricktype;
+
+	nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
+	cnode = nasid_to_cnodeid(nasid);
+	geoid = cnodeid_get_geoid(cnode);
+	moduleid = geo_module(geoid);
+
+	sprintf(address, "module_%c%c%c%c%.2d",
+		'0'+RACK_GET_CLASS(MODULE_GET_RACK(moduleid)),
+		'0'+RACK_GET_GROUP(MODULE_GET_RACK(moduleid)),
+		'0'+RACK_GET_NUM(MODULE_GET_RACK(moduleid)),
+		MODULE_GET_BTCHAR(moduleid), MODULE_GET_BPOS(moduleid));
+
+	/* Tollhouse requires slot id to be displayed */
+	bricktype = MODULE_GET_BTYPE(moduleid);
+	if ((bricktype == L1_BRICKTYPE_191010) ||
+	    (bricktype == L1_BRICKTYPE_1932))
+			sprintf(address, "%s^%d", address, geo_slot(geoid));
+}
+
+/*
+ * sn_pci_fixup_bus() - Perform SN specific setup of software structs
+ *			(pcibus_bussoft, pcidev_info) and hardware
+ *			registers, for the specified bus and devices under it.
+ */
+void __devinit
+sn_pci_fixup_bus(struct pci_bus *bus)
+{
+
+	if (SN_ACPI_BASE_SUPPORT())
+		sn_acpi_bus_fixup(bus);
+	else
+		sn_bus_fixup(bus);
+}
+
+/*
+ * sn_io_early_init - Perform early IO (and some non-IO) initialization.
+ *		      In particular, setup the sn_pci_provider[] array.
+ *		      This needs to be done prior to any bus scanning
+ *		      (acpi_scan_init()) in the ACPI case, as the SN
+ *		      bus fixup code will reference the array.
+ */
+static int __init
+sn_io_early_init(void)
+{
+	int i;
+
+	if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
+		return 0;
+
+	/*
+	 * prime sn_pci_provider[].  Individial provider init routines will
+	 * override their respective default entries.
+	 */
+
+	for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
+		sn_pci_provider[i] = &sn_pci_default_provider;
+
+	pcibr_init_provider();
+	tioca_init_provider();
+	tioce_init_provider();
+
+	/*
+	 * This is needed to avoid bounce limit checks in the blk layer
+	 */
+	ia64_max_iommu_merge_mask = ~PAGE_MASK;
+
+	sn_irq_lh_init();
+	INIT_LIST_HEAD(&sn_sysdata_list);
+	sn_init_cpei_timer();
+
+#ifdef CONFIG_PROC_FS
+	register_sn_procfs();
+#endif
+
+	printk(KERN_INFO "ACPI  DSDT OEM Rev 0x%x\n",
+	       acpi_gbl_DSDT->oem_revision);
+	if (SN_ACPI_BASE_SUPPORT())
+		sn_io_acpi_init();
+	else
+		sn_io_init();
+	return 0;
+}
+
+arch_initcall(sn_io_early_init);
+
+/*
+ * sn_io_late_init() - Perform any final platform specific IO initialization.
+ */
+
+int __init
+sn_io_late_init(void)
+{
+	struct pci_bus *bus;
+	struct pcibus_bussoft *bussoft;
+	cnodeid_t cnode;
+	nasid_t nasid;
+	cnodeid_t near_cnode;
+
+	if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
+		return 0;
+
+	/*
+	 * Setup closest node in pci_controller->node for
+	 * PIC, TIOCP, TIOCE (TIOCA does it during bus fixup using
+	 * info from the PROM).
+	 */
+	bus = NULL;
+	while ((bus = pci_find_next_bus(bus)) != NULL) {
+		bussoft = SN_PCIBUS_BUSSOFT(bus);
+		nasid = NASID_GET(bussoft->bs_base);
+		cnode = nasid_to_cnodeid(nasid);
+		if ((bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) ||
+		    (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCE)) {
+			/* TIO PCI Bridge: find nearest node with CPUs */
+			int e = sn_hwperf_get_nearest_node(cnode, NULL,
+							   &near_cnode);
+			if (e < 0) {
+				near_cnode = (cnodeid_t)-1; /* use any node */
+				printk(KERN_WARNING "pcibr_bus_fixup: failed "
+				       "to find near node with CPUs to TIO "
+				       "node %d, err=%d\n", cnode, e);
+			}
+			PCI_CONTROLLER(bus)->node = near_cnode;
+		} else if (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_PIC) {
+			PCI_CONTROLLER(bus)->node = cnode;
+		}
+	}
+
+	sn_ioif_inited = 1;	/* SN I/O infrastructure now initialized */
+
+	return 0;
+}
+
+fs_initcall(sn_io_late_init);
+
+EXPORT_SYMBOL(sn_pci_fixup_slot);
+EXPORT_SYMBOL(sn_pci_unfixup_slot);
+EXPORT_SYMBOL(sn_bus_store_sysdata);
+EXPORT_SYMBOL(sn_bus_free_sysdata);
+EXPORT_SYMBOL(sn_generate_path);
+
diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index dc09a6a28a3..9ad843e0383 100644
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -3,103 +3,28 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 1992 - 1997, 2000-2005 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 1992 - 1997, 2000-2006 Silicon Graphics, Inc. All rights reserved.
  */
 
-#include <linux/bootmem.h>
-#include <linux/nodemask.h>
 #include <asm/sn/types.h>
 #include <asm/sn/addrs.h>
-#include <asm/sn/sn_feature_sets.h>
-#include <asm/sn/geo.h>
 #include <asm/sn/io.h>
-#include <asm/sn/l1.h>
 #include <asm/sn/module.h>
-#include <asm/sn/pcibr_provider.h>
+#include <asm/sn/intr.h>
 #include <asm/sn/pcibus_provider_defs.h>
 #include <asm/sn/pcidev.h>
-#include <asm/sn/simulator.h>
 #include <asm/sn/sn_sal.h>
-#include <asm/sn/tioca_provider.h>
-#include <asm/sn/tioce_provider.h>
 #include "xtalk/hubdev.h"
-#include "xtalk/xwidgetdev.h"
-
-
-extern void sn_init_cpei_timer(void);
-extern void register_sn_procfs(void);
-
-static struct list_head sn_sysdata_list;
-
-/* sysdata list struct */
-struct sysdata_el {
-	struct list_head entry;
-	void *sysdata;
-};
-
-struct slab_info {
-	struct hubdev_info hubdev;
-};
-
-struct brick {
-	moduleid_t id;		/* Module ID of this module        */
-	struct slab_info slab_info[MAX_SLABS + 1];
-};
-
-int sn_ioif_inited;		/* SN I/O infrastructure initialized? */
-
-struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];	/* indexed by asic type */
-
-static int max_segment_number;		 /* Default highest segment number */
-static int max_pcibus_number = 255;	/* Default highest pci bus number */
 
 /*
- * Hooks and struct for unsupported pci providers
+ * The code in this file will only be executed when running with
+ * a PROM that does _not_ have base ACPI IO support.
+ * (i.e., SN_ACPI_BASE_SUPPORT() == 0)
  */
 
-static dma_addr_t
-sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size, int type)
-{
-	return 0;
-}
-
-static void
-sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
-{
-	return;
-}
-
-static void *
-sn_default_pci_bus_fixup(struct pcibus_bussoft *soft, struct pci_controller *controller)
-{
-	return NULL;
-}
-
-static struct sn_pcibus_provider sn_pci_default_provider = {
-	.dma_map = sn_default_pci_map,
-	.dma_map_consistent = sn_default_pci_map,
-	.dma_unmap = sn_default_pci_unmap,
-	.bus_fixup = sn_default_pci_bus_fixup,
-};
-
-/*
- * Retrieve the DMA Flush List given nasid, widget, and device.
- * This list is needed to implement the WAR - Flush DMA data on PIO Reads.
- */
-static inline u64
-sal_get_device_dmaflush_list(u64 nasid, u64 widget_num, u64 device_num,
-			     u64 address)
-{
-	struct ia64_sal_retval ret_stuff;
-	ret_stuff.status = 0;
-	ret_stuff.v0 = 0;
+static int max_segment_number;		 /* Default highest segment number */
+static int max_pcibus_number = 255;	/* Default highest pci bus number */
 
-	SAL_CALL_NOLOCK(ret_stuff,
-			(u64) SN_SAL_IOIF_GET_DEVICE_DMAFLUSH_LIST,
-			(u64) nasid, (u64) widget_num,
-			(u64) device_num, (u64) address, 0, 0, 0);
-	return ret_stuff.status;
-}
 
 /*
  * Retrieve the hub device info structure for the given nasid.
@@ -131,93 +56,20 @@ static inline u64 sal_get_pcibus_info(u64 segment, u64 busnum, u64 address)
 	return ret_stuff.v0;
 }
 
-/*
- * Retrieve the pci device information given the bus and device|function number.
- */
-static inline u64
-sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
-		    u64 sn_irq_info)
-{
-	struct ia64_sal_retval ret_stuff;
-	ret_stuff.status = 0;
-	ret_stuff.v0 = 0;
-
-	SAL_CALL_NOLOCK(ret_stuff,
-			(u64) SN_SAL_IOIF_GET_PCIDEV_INFO,
-			(u64) segment, (u64) bus_number, (u64) devfn,
-			(u64) pci_dev,
-			sn_irq_info, 0, 0);
-	return ret_stuff.v0;
-}
-
-/*
- * sn_pcidev_info_get() - Retrieve the pcidev_info struct for the specified
- *			  device.
- */
-inline struct pcidev_info *
-sn_pcidev_info_get(struct pci_dev *dev)
-{
-	struct pcidev_info *pcidev;
-
-	list_for_each_entry(pcidev,
-			    &(SN_PCI_CONTROLLER(dev)->pcidev_info), pdi_list) {
-		if (pcidev->pdi_linux_pcidev == dev) {
-			return pcidev;
-		}
-	}
-	return NULL;
-}
-
-/* Older PROM flush WAR
- *
- * 01/16/06 -- This war will be in place until a new official PROM is released.
- * Additionally note that the struct sn_flush_device_war also has to be
- * removed from arch/ia64/sn/include/xtalk/hubdev.h
- */
-static u8 war_implemented = 0;
-
-static s64 sn_device_fixup_war(u64 nasid, u64 widget, int device,
-			       struct sn_flush_device_common *common)
-{
-	struct sn_flush_device_war *war_list;
-	struct sn_flush_device_war *dev_entry;
-	struct ia64_sal_retval isrv = {0,0,0,0};
-
-	if (!war_implemented) {
-		printk(KERN_WARNING "PROM version < 4.50 -- implementing old "
-		       "PROM flush WAR\n");
-		war_implemented = 1;
-	}
-
-	war_list = kzalloc(DEV_PER_WIDGET * sizeof(*war_list), GFP_KERNEL);
-	if (!war_list)
-		BUG();
-
-	SAL_CALL_NOLOCK(isrv, SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
-			nasid, widget, __pa(war_list), 0, 0, 0 ,0);
-	if (isrv.status)
-		panic("sn_device_fixup_war failed: %s\n",
-		      ia64_sal_strerror(isrv.status));
-
-	dev_entry = war_list + device;
-	memcpy(common,dev_entry, sizeof(*common));
-	kfree(war_list);
-
-	return isrv.status;
-}
 
 /*
- * sn_fixup_ionodes() - This routine initializes the HUB data strcuture for
- *	each node in the system.
+ * sn_fixup_ionodes() - This routine initializes the HUB data structure for
+ *			each node in the system. This function is only
+ *			executed when running with a non-ACPI capable PROM.
  */
 static void __init sn_fixup_ionodes(void)
 {
-	struct sn_flush_device_kernel *sn_flush_device_kernel;
-	struct sn_flush_device_kernel *dev_entry;
+
 	struct hubdev_info *hubdev;
 	u64 status;
 	u64 nasid;
-	int i, widget, device, size;
+	int i;
+	extern void sn_common_hubdev_init(struct hubdev_info *);
 
 	/*
 	 * Get SGI Specific HUB chipset information.
@@ -240,70 +92,47 @@ static void __init sn_fixup_ionodes(void)
 			max_segment_number = hubdev->max_segment_number;
 			max_pcibus_number = hubdev->max_pcibus_number;
 		}
+		sn_common_hubdev_init(hubdev);
+	}
+}
 
-		/* Attach the error interrupt handlers */
-		if (nasid & 1)
-			ice_error_init(hubdev);
-		else
-			hub_error_init(hubdev);
-
-		for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
-			hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
-
-		if (!hubdev->hdi_flush_nasid_list.widget_p)
-			continue;
-
-		size = (HUB_WIDGET_ID_MAX + 1) *
-			sizeof(struct sn_flush_device_kernel *);
-		hubdev->hdi_flush_nasid_list.widget_p =
-			kzalloc(size, GFP_KERNEL);
-		if (!hubdev->hdi_flush_nasid_list.widget_p)
+/*
+ * sn_pci_legacy_window_fixup - Create PCI controller windows for
+ *				legacy IO and MEM space. This needs to
+ *				be done here, as the PROM does not have
+ *				ACPI support defining the root buses
+ *				and their resources (_CRS),
+ */
+static void
+sn_legacy_pci_window_fixup(struct pci_controller *controller,
+			   u64 legacy_io, u64 legacy_mem)
+{
+		controller->window = kcalloc(2, sizeof(struct pci_window),
+					     GFP_KERNEL);
+		if (controller->window == NULL)
 			BUG();
-
-		for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
-			size = DEV_PER_WIDGET *
-				sizeof(struct sn_flush_device_kernel);
-			sn_flush_device_kernel = kzalloc(size, GFP_KERNEL);
-			if (!sn_flush_device_kernel)
-				BUG();
-
-			dev_entry = sn_flush_device_kernel;
-			for (device = 0; device < DEV_PER_WIDGET;
-			     device++,dev_entry++) {
-				size = sizeof(struct sn_flush_device_common);
-				dev_entry->common = kzalloc(size, GFP_KERNEL);
-				if (!dev_entry->common)
-					BUG();
-
-				if (sn_prom_feature_available(
-						       PRF_DEVICE_FLUSH_LIST))
-					status = sal_get_device_dmaflush_list(
-						     nasid, widget, device,
-						     (u64)(dev_entry->common));
-				else
-					status = sn_device_fixup_war(nasid,
-						     widget, device,
-						     dev_entry->common);
-				if (status != SALRET_OK)
-					panic("SAL call failed: %s\n",
-					      ia64_sal_strerror(status));
-
-				spin_lock_init(&dev_entry->sfdl_flush_lock);
-			}
-
-			if (sn_flush_device_kernel)
-				hubdev->hdi_flush_nasid_list.widget_p[widget] =
-						       sn_flush_device_kernel;
-	        }
-	}
+		controller->window[0].offset = legacy_io;
+		controller->window[0].resource.name = "legacy_io";
+		controller->window[0].resource.flags = IORESOURCE_IO;
+		controller->window[0].resource.start = legacy_io;
+		controller->window[0].resource.end =
+	    			controller->window[0].resource.start + 0xffff;
+		controller->window[0].resource.parent = &ioport_resource;
+		controller->window[1].offset = legacy_mem;
+		controller->window[1].resource.name = "legacy_mem";
+		controller->window[1].resource.flags = IORESOURCE_MEM;
+		controller->window[1].resource.start = legacy_mem;
+		controller->window[1].resource.end =
+	    	       controller->window[1].resource.start + (1024 * 1024) - 1;
+		controller->window[1].resource.parent = &iomem_resource;
+		controller->windows = 2;
 }
 
 /*
  * sn_pci_window_fixup() - Create a pci_window for each device resource.
- *			   Until ACPI support is added, we need this code
- *			   to setup pci_windows for use by
- *			   pcibios_bus_to_resource(),
- *			   pcibios_resource_to_bus(), etc.
+ *			   It will setup pci_windows for use by
+ *			   pcibios_bus_to_resource(), pcibios_resource_to_bus(),
+ *			   etc.
  */
 static void
 sn_pci_window_fixup(struct pci_dev *dev, unsigned int count,
@@ -342,60 +171,22 @@ sn_pci_window_fixup(struct pci_dev *dev, unsigned int count,
 	controller->window = new_window;
 }
 
-void sn_pci_unfixup_slot(struct pci_dev *dev)
-{
-	struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
-
-	sn_irq_unfixup(dev);
-	pci_dev_put(host_pci_dev);
-	pci_dev_put(dev);
-}
-
 /*
- * sn_pci_fixup_slot() - This routine sets up a slot's resources
- * consistent with the Linux PCI abstraction layer.  Resources acquired
- * from our PCI provider include PIO maps to BAR space and interrupt
- * objects.
+ * sn_more_slot_fixup() - We are not running with an ACPI capable PROM,
+ *			  and need to convert the pci_dev->resource
+ *			  'start' and 'end' addresses to mapped addresses,
+ *			  and setup the pci_controller->window array entries.
  */
-void sn_pci_fixup_slot(struct pci_dev *dev)
+void
+sn_more_slot_fixup(struct pci_dev *dev, struct pcidev_info *pcidev_info)
 {
 	unsigned int count = 0;
 	int idx;
-	int segment = pci_domain_nr(dev->bus);
-	int status = 0;
-	struct pcibus_bussoft *bs;
- 	struct pci_bus *host_pci_bus;
- 	struct pci_dev *host_pci_dev;
-	struct pcidev_info *pcidev_info;
 	s64 pci_addrs[PCI_ROM_RESOURCE + 1];
- 	struct sn_irq_info *sn_irq_info;
- 	unsigned long size;
- 	unsigned int bus_no, devfn;
-
-	pci_dev_get(dev); /* for the sysdata pointer */
-	pcidev_info = kzalloc(sizeof(struct pcidev_info), GFP_KERNEL);
-	if (!pcidev_info)
-		BUG();		/* Cannot afford to run out of memory */
-
-	sn_irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
-	if (!sn_irq_info)
-		BUG();		/* Cannot afford to run out of memory */
-
-	/* Call to retrieve pci device information needed by kernel. */
-	status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number, 
-				     dev->devfn,
-				     (u64) __pa(pcidev_info),
-				     (u64) __pa(sn_irq_info));
-	if (status)
-		BUG(); /* Cannot get platform pci device information */
-
-	/* Add pcidev_info to list in sn_pci_controller struct */
-	list_add_tail(&pcidev_info->pdi_list,
-		      &(SN_PCI_CONTROLLER(dev->bus)->pcidev_info));
+	unsigned long addr, end, size, start;
 
 	/* Copy over PIO Mapped Addresses */
 	for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
-		unsigned long start, end, addr;
 
 		if (!pcidev_info->pdi_pio_mapped_addr[idx]) {
 			pci_addrs[idx] = -1;
@@ -419,60 +210,28 @@ void sn_pci_fixup_slot(struct pci_dev *dev)
 			dev->resource[idx].parent = &ioport_resource;
 		else
 			dev->resource[idx].parent = &iomem_resource;
+		/* If ROM, mark as shadowed in PROM */
+		if (idx == PCI_ROM_RESOURCE)
+			dev->resource[idx].flags |= IORESOURCE_ROM_BIOS_COPY;
 	}
 	/* Create a pci_window in the pci_controller struct for
 	 * each device resource.
 	 */
 	if (count > 0)
 		sn_pci_window_fixup(dev, count, pci_addrs);
-
-	/*
-	 * Using the PROMs values for the PCI host bus, get the Linux
- 	 * PCI host_pci_dev struct and set up host bus linkages
- 	 */
-
-	bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
-	devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff;
- 	host_pci_bus = pci_find_bus(segment, bus_no);
- 	host_pci_dev = pci_get_slot(host_pci_bus, devfn);
-
-	pcidev_info->host_pci_dev = host_pci_dev;
-	pcidev_info->pdi_linux_pcidev = dev;
-	pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev);
-	bs = SN_PCIBUS_BUSSOFT(dev->bus);
-	pcidev_info->pdi_pcibus_info = bs;
-
-	if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
-		SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
-	} else {
-		SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
-	}
-
-	/* Only set up IRQ stuff if this device has a host bus context */
-	if (bs && sn_irq_info->irq_irq) {
-		pcidev_info->pdi_sn_irq_info = sn_irq_info;
-		dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq;
-		sn_irq_fixup(dev, sn_irq_info);
-	} else {
-		pcidev_info->pdi_sn_irq_info = NULL;
-		kfree(sn_irq_info);
-	}
 }
 
 /*
  * sn_pci_controller_fixup() - This routine sets up a bus's resources
- * consistent with the Linux PCI abstraction layer.
+ *			       consistent with the Linux PCI abstraction layer.
  */
-void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
+static void
+sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
 {
-	int status;
-	int nasid, cnode;
+	s64 status = 0;
 	struct pci_controller *controller;
-	struct sn_pci_controller *sn_controller;
 	struct pcibus_bussoft *prom_bussoft_ptr;
-	struct hubdev_info *hubdev_info;
-	void *provider_soft;
-	struct sn_pcibus_provider *provider;
+
 
  	status = sal_get_pcibus_info((u64) segment, (u64) busnum,
  				     (u64) ia64_tpa(&prom_bussoft_ptr));
@@ -480,261 +239,77 @@ void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
 		return;		/*bus # does not exist */
 	prom_bussoft_ptr = __va(prom_bussoft_ptr);
 
-	/* Allocate a sn_pci_controller, which has a pci_controller struct
-	 * as the first member.
-	 */
-	sn_controller = kzalloc(sizeof(struct sn_pci_controller), GFP_KERNEL);
-	if (!sn_controller)
+	controller = kzalloc(sizeof(*controller), GFP_KERNEL);
+	if (!controller)
 		BUG();
-	INIT_LIST_HEAD(&sn_controller->pcidev_info);
-	controller = &sn_controller->pci_controller;
 	controller->segment = segment;
 
-	if (bus == NULL) {
- 		bus = pci_scan_bus(busnum, &pci_root_ops, controller);
- 		if (bus == NULL)
- 			goto error_return; /* error, or bus already scanned */
- 		bus->sysdata = NULL;
-	}
-
-	if (bus->sysdata)
-		goto error_return; /* sysdata already alloc'd */
-
 	/*
-	 * Per-provider fixup.  Copies the contents from prom to local
-	 * area and links SN_PCIBUS_BUSSOFT().
+	 * Temporarily save the prom_bussoft_ptr for use by sn_bus_fixup().
+	 * (platform_data will be overwritten later in sn_common_bus_fixup())
 	 */
+	controller->platform_data = prom_bussoft_ptr;
 
-	if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES)
-		goto error_return; /* unsupported asic type */
-
-	if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
-		goto error_return; /* no further fixup necessary */
-
-	provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
-	if (provider == NULL)
-		goto error_return; /* no provider registerd for this asic */
+	bus = pci_scan_bus(busnum, &pci_root_ops, controller);
+ 	if (bus == NULL)
+ 		goto error_return; /* error, or bus already scanned */
 
 	bus->sysdata = controller;
-	if (provider->bus_fixup)
-		provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr, controller);
-	else
-		provider_soft = NULL;
-
-	if (provider_soft == NULL) {
-		/* fixup failed or not applicable */
-		bus->sysdata = NULL;
-		goto error_return;
-	}
-
-	/*
-	 * Setup pci_windows for legacy IO and MEM space.
-	 * (Temporary until ACPI support is in place.)
-	 */
-	controller->window = kcalloc(2, sizeof(struct pci_window), GFP_KERNEL);
-	if (controller->window == NULL)
-		BUG();
-	controller->window[0].offset = prom_bussoft_ptr->bs_legacy_io;
-	controller->window[0].resource.name = "legacy_io";
-	controller->window[0].resource.flags = IORESOURCE_IO;
-	controller->window[0].resource.start = prom_bussoft_ptr->bs_legacy_io;
-	controller->window[0].resource.end =
-	    controller->window[0].resource.start + 0xffff;
-	controller->window[0].resource.parent = &ioport_resource;
-	controller->window[1].offset = prom_bussoft_ptr->bs_legacy_mem;
-	controller->window[1].resource.name = "legacy_mem";
-	controller->window[1].resource.flags = IORESOURCE_MEM;
-	controller->window[1].resource.start = prom_bussoft_ptr->bs_legacy_mem;
-	controller->window[1].resource.end =
-	    controller->window[1].resource.start + (1024 * 1024) - 1;
-	controller->window[1].resource.parent = &iomem_resource;
-	controller->windows = 2;
-
-	/*
-	 * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
-	 * after this point.
-	 */
-
-	PCI_CONTROLLER(bus)->platform_data = provider_soft;
-	nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
-	cnode = nasid_to_cnodeid(nasid);
-	hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
-	SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
-	    &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
 
-	/*
-	 * If the node information we obtained during the fixup phase is invalid
-	 * then set controller->node to -1 (undetermined)
-	 */
-	if (controller->node >= num_online_nodes()) {
-		struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
-
-		printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u"
-				    "L_IO=%lx L_MEM=%lx BASE=%lx\n",
-			b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
-			b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
-		printk(KERN_WARNING "on node %d but only %d nodes online."
-			"Association set to undetermined.\n",
-			controller->node, num_online_nodes());
-		controller->node = -1;
-	}
 	return;
 
 error_return:
 
-	kfree(sn_controller);
+	kfree(controller);
 	return;
 }
 
-void sn_bus_store_sysdata(struct pci_dev *dev)
+/*
+ * sn_bus_fixup
+ */
+void
+sn_bus_fixup(struct pci_bus *bus)
 {
-	struct sysdata_el *element;
-
-	element = kzalloc(sizeof(struct sysdata_el), GFP_KERNEL);
-	if (!element) {
-		dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__);
-		return;
-	}
-	element->sysdata = SN_PCIDEV_INFO(dev);
-	list_add(&element->entry, &sn_sysdata_list);
-}
+	struct pci_dev *pci_dev = NULL;
+	struct pcibus_bussoft *prom_bussoft_ptr;
+	extern void sn_common_bus_fixup(struct pci_bus *,
+					struct pcibus_bussoft *);
+
+
+	if (!bus->parent) {  /* If root bus */
+		prom_bussoft_ptr = PCI_CONTROLLER(bus)->platform_data;
+		if (prom_bussoft_ptr == NULL) {
+			printk(KERN_ERR
+			       "sn_bus_fixup: 0x%04x:0x%02x Unable to "
+			       "obtain prom_bussoft_ptr\n",
+			       pci_domain_nr(bus), bus->number);
+			return;
+		}
+		sn_common_bus_fixup(bus, prom_bussoft_ptr);
+		sn_legacy_pci_window_fixup(PCI_CONTROLLER(bus),
+					   prom_bussoft_ptr->bs_legacy_io,
+					   prom_bussoft_ptr->bs_legacy_mem);
+        }
+        list_for_each_entry(pci_dev, &bus->devices, bus_list) {
+                sn_pci_fixup_slot(pci_dev);
+        }
 
-void sn_bus_free_sysdata(void)
-{
-	struct sysdata_el *element;
-	struct list_head *list, *safe;
-
-	list_for_each_safe(list, safe, &sn_sysdata_list) {
-		element = list_entry(list, struct sysdata_el, entry);
-		list_del(&element->entry);
-		list_del(&(((struct pcidev_info *)
-			     (element->sysdata))->pdi_list));
-		kfree(element->sysdata);
-		kfree(element);
-	}
-	return;
 }
 
 /*
- * Ugly hack to get PCI setup until we have a proper ACPI namespace.
+ * sn_io_init - PROM does not have ACPI support to define nodes or root buses,
+ *		so we need to do things the hard way, including initiating the
+ *		bus scanning ourselves.
  */
 
-#define PCI_BUSES_TO_SCAN 256
-
-static int __init sn_pci_init(void)
+void __init sn_io_init(void)
 {
 	int i, j;
-	struct pci_dev *pci_dev = NULL;
-
-	if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
-		return 0;
-
-	/*
-	 * prime sn_pci_provider[].  Individial provider init routines will
-	 * override their respective default entries.
-	 */
-
-	for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
-		sn_pci_provider[i] = &sn_pci_default_provider;
 
-	pcibr_init_provider();
-	tioca_init_provider();
-	tioce_init_provider();
-
-	/*
-	 * This is needed to avoid bounce limit checks in the blk layer
-	 */
-	ia64_max_iommu_merge_mask = ~PAGE_MASK;
 	sn_fixup_ionodes();
-	sn_irq_lh_init();
-	INIT_LIST_HEAD(&sn_sysdata_list);
-	sn_init_cpei_timer();
-
-#ifdef CONFIG_PROC_FS
-	register_sn_procfs();
-#endif
 
 	/* busses are not known yet ... */
 	for (i = 0; i <= max_segment_number; i++)
 		for (j = 0; j <= max_pcibus_number; j++)
 			sn_pci_controller_fixup(i, j, NULL);
-
-	/*
-	 * Generic Linux PCI Layer has created the pci_bus and pci_dev 
-	 * structures - time for us to add our SN PLatform specific 
-	 * information.
-	 */
-
-	while ((pci_dev =
-		pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL)
-		sn_pci_fixup_slot(pci_dev);
-
-	sn_ioif_inited = 1;	/* sn I/O infrastructure now initialized */
-
-	return 0;
-}
-
-/*
- * hubdev_init_node() - Creates the HUB data structure and link them to it's 
- *	own NODE specific data area.
- */
-void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
-{
-	struct hubdev_info *hubdev_info;
-	int size;
-	pg_data_t *pg;
-
-	size = sizeof(struct hubdev_info);
-
-	if (node >= num_online_nodes())	/* Headless/memless IO nodes */
-		pg = NODE_DATA(0);
-	else
-		pg = NODE_DATA(node);
-
-	hubdev_info = (struct hubdev_info *)alloc_bootmem_node(pg, size);
-
-	npda->pdinfo = (void *)hubdev_info;
 }
-
-geoid_t
-cnodeid_get_geoid(cnodeid_t cnode)
-{
-	struct hubdev_info *hubdev;
-
-	hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
-	return hubdev->hdi_geoid;
-}
-
-void sn_generate_path(struct pci_bus *pci_bus, char *address)
-{
-	nasid_t nasid;
-	cnodeid_t cnode;
-	geoid_t geoid;
-	moduleid_t moduleid;
-	u16 bricktype;
-
-	nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
-	cnode = nasid_to_cnodeid(nasid);
-	geoid = cnodeid_get_geoid(cnode);
-	moduleid = geo_module(geoid);
-
-	sprintf(address, "module_%c%c%c%c%.2d",
-		'0'+RACK_GET_CLASS(MODULE_GET_RACK(moduleid)),
-		'0'+RACK_GET_GROUP(MODULE_GET_RACK(moduleid)),
-		'0'+RACK_GET_NUM(MODULE_GET_RACK(moduleid)),
-		MODULE_GET_BTCHAR(moduleid), MODULE_GET_BPOS(moduleid));
-
-	/* Tollhouse requires slot id to be displayed */
-	bricktype = MODULE_GET_BTYPE(moduleid);
-	if ((bricktype == L1_BRICKTYPE_191010) ||
-	    (bricktype == L1_BRICKTYPE_1932))
-			sprintf(address, "%s^%d", address, geo_slot(geoid));
-}
-
-subsys_initcall(sn_pci_init);
-EXPORT_SYMBOL(sn_pci_fixup_slot);
-EXPORT_SYMBOL(sn_pci_unfixup_slot);
-EXPORT_SYMBOL(sn_pci_controller_fixup);
-EXPORT_SYMBOL(sn_bus_store_sysdata);
-EXPORT_SYMBOL(sn_bus_free_sysdata);
-EXPORT_SYMBOL(sn_generate_path);
diff --git a/arch/ia64/sn/kernel/iomv.c b/arch/ia64/sn/kernel/iomv.c
index 7ce3cdad627..4aa4f301d56 100644
--- a/arch/ia64/sn/kernel/iomv.c
+++ b/arch/ia64/sn/kernel/iomv.c
@@ -3,10 +3,11 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2000-2003 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2000-2003, 2006 Silicon Graphics, Inc. All rights reserved.
  */
 
 #include <linux/module.h>
+#include <linux/acpi.h>
 #include <asm/io.h>
 #include <asm/delay.h>
 #include <asm/vga.h>
@@ -15,6 +16,7 @@
 #include <asm/sn/pda.h>
 #include <asm/sn/sn_cpuid.h>
 #include <asm/sn/shub_mmr.h>
+#include <asm/sn/acpi.h>
 
 #define IS_LEGACY_VGA_IOPORT(p) \
 	(((p) >= 0x3b0 && (p) <= 0x3bb) || ((p) >= 0x3c0 && (p) <= 0x3df))
@@ -31,11 +33,14 @@ void *sn_io_addr(unsigned long port)
 {
 	if (!IS_RUNNING_ON_SIMULATOR()) {
 		if (IS_LEGACY_VGA_IOPORT(port))
-			port += vga_console_iobase;
+			return (__ia64_mk_io_addr(port));
 		/* On sn2, legacy I/O ports don't point at anything */
 		if (port < (64 * 1024))
 			return NULL;
-		return ((void *)(port | __IA64_UNCACHED_OFFSET));
+		if (SN_ACPI_BASE_SUPPORT())
+			return (__ia64_mk_io_addr(port));
+		else
+			return ((void *)(port | __IA64_UNCACHED_OFFSET));
 	} else {
 		/* but the simulator uses them... */
 		unsigned long addr;
diff --git a/arch/ia64/sn/kernel/setup.c b/arch/ia64/sn/kernel/setup.c
index 7a2d824c5ce..1d009f93244 100644
--- a/arch/ia64/sn/kernel/setup.c
+++ b/arch/ia64/sn/kernel/setup.c
@@ -388,6 +388,14 @@ void __init sn_setup(char **cmdline_p)
 	ia64_sn_plat_set_error_handling_features();	// obsolete
 	ia64_sn_set_os_feature(OSF_MCA_SLV_TO_OS_INIT_SLV);
 	ia64_sn_set_os_feature(OSF_FEAT_LOG_SBES);
+	/*
+	 * Note: The calls to notify the PROM of ACPI and PCI Segment
+	 *	 support must be done prior to acpi_load_tables(), as
+	 *	 an ACPI capable PROM will rebuild the DSDT as result
+	 *	 of the call.
+	 */
+	ia64_sn_set_os_feature(OSF_PCISEGMENT_ENABLE);
+	ia64_sn_set_os_feature(OSF_ACPI_ENABLE);
 
 
 #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
@@ -413,6 +421,16 @@ void __init sn_setup(char **cmdline_p)
 	if (! vga_console_membase)
 		sn_scan_pcdp();
 
+	/*
+	 *	Setup legacy IO space.
+	 *	vga_console_iobase maps to PCI IO Space address 0 on the
+	 * 	bus containing the VGA console.
+	 */
+	if (vga_console_iobase) {
+		io_space[0].mmio_base = vga_console_iobase;
+		io_space[0].sparse = 0;
+	}
+
 	if (vga_console_membase) {
 		/* usable vga ... make tty0 the preferred default console */
 		if (!strstr(*cmdline_p, "console="))
diff --git a/arch/ia64/sn/kernel/tiocx.c b/arch/ia64/sn/kernel/tiocx.c
index feaf1a6e810..493380b2c05 100644
--- a/arch/ia64/sn/kernel/tiocx.c
+++ b/arch/ia64/sn/kernel/tiocx.c
@@ -552,7 +552,7 @@ static void __exit tiocx_exit(void)
 	bus_unregister(&tiocx_bus_type);
 }
 
-subsys_initcall(tiocx_init);
+fs_initcall(tiocx_init);
 module_exit(tiocx_exit);
 
 /************************************************************************
diff --git a/arch/ia64/sn/pci/pcibr/pcibr_provider.c b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
index 27dd7df0f44..6846dc9b432 100644
--- a/arch/ia64/sn/pci/pcibr/pcibr_provider.c
+++ b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
@@ -3,7 +3,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2001-2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2001-2004, 2006 Silicon Graphics, Inc. All rights reserved.
  */
 
 #include <linux/interrupt.h>
@@ -109,7 +109,6 @@ void *
 pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *controller)
 {
 	int nasid, cnode, j;
-	cnodeid_t near_cnode;
 	struct hubdev_info *hubdev_info;
 	struct pcibus_info *soft;
 	struct sn_flush_device_kernel *sn_flush_device_kernel;
@@ -186,20 +185,6 @@ pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *cont
 		return NULL;
 	}
 
-	if (prom_bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) {
-		/* TIO PCI Bridge: find nearest node with CPUs */
-		int e = sn_hwperf_get_nearest_node(cnode, NULL, &near_cnode);
-
-		if (e < 0) {
-			near_cnode = (cnodeid_t)-1; /* use any node */
-			printk(KERN_WARNING "pcibr_bus_fixup: failed to find "
-				"near node with CPUs to TIO node %d, err=%d\n",
-				cnode, e);
-		}
-		controller->node = near_cnode;
-	}
-	else
-		controller->node = cnode;
 	return soft;
 }
 
diff --git a/arch/ia64/sn/pci/tioce_provider.c b/arch/ia64/sn/pci/tioce_provider.c
index 46e16dcf597..35f854fb612 100644
--- a/arch/ia64/sn/pci/tioce_provider.c
+++ b/arch/ia64/sn/pci/tioce_provider.c
@@ -15,7 +15,6 @@
 #include <asm/sn/pcidev.h>
 #include <asm/sn/pcibus_provider_defs.h>
 #include <asm/sn/tioce_provider.h>
-#include <asm/sn/sn2/sn_hwperf.h>
 
 /*
  * 1/26/2006
@@ -990,8 +989,6 @@ tioce_target_interrupt(struct sn_irq_info *sn_irq_info)
 static void *
 tioce_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *controller)
 {
-	int my_nasid;
-	cnodeid_t my_cnode, mem_cnode;
 	struct tioce_common *tioce_common;
 	struct tioce_kernel *tioce_kern;
 	struct tioce __iomem *tioce_mmr;
@@ -1035,21 +1032,6 @@ tioce_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *cont
 		       tioce_common->ce_pcibus.bs_persist_segment,
 		       tioce_common->ce_pcibus.bs_persist_busnum);
 
-	/*
-	 * identify closest nasid for memory allocations
-	 */
-
-	my_nasid = NASID_GET(tioce_common->ce_pcibus.bs_base);
-	my_cnode = nasid_to_cnodeid(my_nasid);
-
-	if (sn_hwperf_get_nearest_node(my_cnode, &mem_cnode, NULL) < 0) {
-		printk(KERN_WARNING "tioce_bus_fixup: failed to find "
-		       "closest node with MEM to TIO node %d\n", my_cnode);
-		mem_cnode = (cnodeid_t)-1; /* use any node */
-	}
-
-	controller->node = mem_cnode;
-
 	return tioce_common;
 }
 
diff --git a/arch/powerpc/platforms/powermac/pci.c b/arch/powerpc/platforms/powermac/pci.c
index 9923adc5248..257dc906846 100644
--- a/arch/powerpc/platforms/powermac/pci.c
+++ b/arch/powerpc/platforms/powermac/pci.c
@@ -48,7 +48,6 @@ static struct pci_controller *u3_ht;
 static int has_second_ohare;
 #endif /* CONFIG_PPC64 */
 
-extern u8 pci_cache_line_size;
 extern int pcibios_assign_bus_offset;
 
 struct device_node *k2_skiplist[2];
diff --git a/arch/sparc64/kernel/pci.c b/arch/sparc64/kernel/pci.c
index e02f01b644a..dfc41cd4bb5 100644
--- a/arch/sparc64/kernel/pci.c
+++ b/arch/sparc64/kernel/pci.c
@@ -646,13 +646,4 @@ int pci_domain_nr(struct pci_bus *pbus)
 }
 EXPORT_SYMBOL(pci_domain_nr);
 
-int pcibios_prep_mwi(struct pci_dev *dev)
-{
-	/* We set correct PCI_CACHE_LINE_SIZE register values for every
-	 * device probed on this platform.  So there is nothing to check
-	 * and this always succeeds.
-	 */
-	return 0;
-}
-
 #endif /* !(CONFIG_PCI) */