235 lines
6.0 KiB
C
235 lines
6.0 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2006 Silicon Graphics, Inc. All rights reserved.
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*/
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#include <asm/sn/types.h>
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#include <asm/sn/addrs.h>
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#include <asm/sn/pcidev.h>
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#include <asm/sn/pcibus_provider_defs.h>
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#include <asm/sn/sn_sal.h>
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#include "xtalk/hubdev.h"
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#include <linux/acpi.h>
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/*
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* The code in this file will only be executed when running with
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* a PROM that has ACPI IO support. (i.e., SN_ACPI_BASE_SUPPORT() == 1)
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*/
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/*
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* This value must match the UUID the PROM uses
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* (io/acpi/defblk.c) when building a vendor descriptor.
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*/
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struct acpi_vendor_uuid sn_uuid = {
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.subtype = 0,
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.data = { 0x2c, 0xc6, 0xa6, 0xfe, 0x9c, 0x44, 0xda, 0x11,
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0xa2, 0x7c, 0x08, 0x00, 0x69, 0x13, 0xea, 0x51 },
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};
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/*
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* Perform the early IO init in PROM.
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*/
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static s64
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sal_ioif_init(u64 *result)
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{
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struct ia64_sal_retval isrv = {0,0,0,0};
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SAL_CALL_NOLOCK(isrv,
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SN_SAL_IOIF_INIT, 0, 0, 0, 0, 0, 0, 0);
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*result = isrv.v0;
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return isrv.status;
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}
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/*
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* sn_hubdev_add - The 'add' function of the acpi_sn_hubdev_driver.
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* Called for every "SGIHUB" or "SGITIO" device defined
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* in the ACPI namespace.
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*/
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static int __init
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sn_hubdev_add(struct acpi_device *device)
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{
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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u64 addr;
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struct hubdev_info *hubdev;
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struct hubdev_info *hubdev_ptr;
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int i;
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u64 nasid;
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struct acpi_resource *resource;
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int ret = 0;
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acpi_status status;
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struct acpi_resource_vendor_typed *vendor;
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extern void sn_common_hubdev_init(struct hubdev_info *);
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status = acpi_get_vendor_resource(device->handle, METHOD_NAME__CRS,
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&sn_uuid, &buffer);
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if (ACPI_FAILURE(status)) {
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printk(KERN_ERR
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"sn_hubdev_add: acpi_get_vendor_resource() failed: %d\n",
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status);
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return 1;
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}
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resource = buffer.pointer;
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vendor = &resource->data.vendor_typed;
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if ((vendor->byte_length - sizeof(struct acpi_vendor_uuid)) !=
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sizeof(struct hubdev_info *)) {
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printk(KERN_ERR
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"sn_hubdev_add: Invalid vendor data length: %d\n",
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vendor->byte_length);
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ret = 1;
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goto exit;
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}
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memcpy(&addr, vendor->byte_data, sizeof(struct hubdev_info *));
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hubdev_ptr = __va((struct hubdev_info *) addr);
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nasid = hubdev_ptr->hdi_nasid;
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i = nasid_to_cnodeid(nasid);
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hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
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*hubdev = *hubdev_ptr;
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sn_common_hubdev_init(hubdev);
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exit:
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kfree(buffer.pointer);
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return ret;
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}
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/*
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* sn_get_bussoft_ptr() - The pcibus_bussoft pointer is found in
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* the ACPI Vendor resource for this bus.
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*/
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static struct pcibus_bussoft *
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sn_get_bussoft_ptr(struct pci_bus *bus)
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{
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u64 addr;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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acpi_handle handle;
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struct pcibus_bussoft *prom_bussoft_ptr;
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struct acpi_resource *resource;
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acpi_status status;
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struct acpi_resource_vendor_typed *vendor;
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handle = PCI_CONTROLLER(bus)->acpi_handle;
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status = acpi_get_vendor_resource(handle, METHOD_NAME__CRS,
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&sn_uuid, &buffer);
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if (ACPI_FAILURE(status)) {
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printk(KERN_ERR "get_acpi_pcibus_ptr: "
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"get_acpi_bussoft_info() failed: %d\n",
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status);
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return NULL;
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}
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resource = buffer.pointer;
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vendor = &resource->data.vendor_typed;
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if ((vendor->byte_length - sizeof(struct acpi_vendor_uuid)) !=
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sizeof(struct pcibus_bussoft *)) {
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printk(KERN_ERR
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"get_acpi_bussoft_ptr: Invalid vendor data "
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"length %d\n", vendor->byte_length);
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kfree(buffer.pointer);
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return NULL;
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}
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memcpy(&addr, vendor->byte_data, sizeof(struct pcibus_bussoft *));
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prom_bussoft_ptr = __va((struct pcibus_bussoft *) addr);
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kfree(buffer.pointer);
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return prom_bussoft_ptr;
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}
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/*
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* sn_acpi_bus_fixup
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*/
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void
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sn_acpi_bus_fixup(struct pci_bus *bus)
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{
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struct pci_dev *pci_dev = NULL;
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struct pcibus_bussoft *prom_bussoft_ptr;
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extern void sn_common_bus_fixup(struct pci_bus *,
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struct pcibus_bussoft *);
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if (!bus->parent) { /* If root bus */
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prom_bussoft_ptr = sn_get_bussoft_ptr(bus);
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if (prom_bussoft_ptr == NULL) {
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printk(KERN_ERR
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"sn_pci_fixup_bus: 0x%04x:0x%02x Unable to "
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"obtain prom_bussoft_ptr\n",
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pci_domain_nr(bus), bus->number);
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return;
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}
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sn_common_bus_fixup(bus, prom_bussoft_ptr);
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}
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list_for_each_entry(pci_dev, &bus->devices, bus_list) {
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sn_pci_fixup_slot(pci_dev);
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}
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}
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/*
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* sn_acpi_slot_fixup - Perform any SN specific slot fixup.
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* At present there does not appear to be
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* any generic way to handle a ROM image
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* that has been shadowed by the PROM, so
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* we pass a pointer to it within the
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* pcidev_info structure.
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*/
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void
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sn_acpi_slot_fixup(struct pci_dev *dev, struct pcidev_info *pcidev_info)
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{
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void __iomem *addr;
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size_t size;
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if (pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE]) {
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/*
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* A valid ROM image exists and has been shadowed by the
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* PROM. Setup the pci_dev ROM resource to point to
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* the shadowed copy.
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*/
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size = dev->resource[PCI_ROM_RESOURCE].end -
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dev->resource[PCI_ROM_RESOURCE].start;
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addr =
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ioremap(pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE],
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size);
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dev->resource[PCI_ROM_RESOURCE].start = (unsigned long) addr;
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dev->resource[PCI_ROM_RESOURCE].end =
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(unsigned long) addr + size;
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dev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_BIOS_COPY;
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}
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}
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static struct acpi_driver acpi_sn_hubdev_driver = {
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.name = "SGI HUBDEV Driver",
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.ids = "SGIHUB,SGITIO",
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.ops = {
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.add = sn_hubdev_add,
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},
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};
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/*
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* sn_io_acpi_init - PROM has ACPI support for IO, defining at a minimum the
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* nodes and root buses in the DSDT. As a result, bus scanning
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* will be initiated by the Linux ACPI code.
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*/
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void __init
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sn_io_acpi_init(void)
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{
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u64 result;
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s64 status;
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/* SN Altix does not follow the IOSAPIC IRQ routing model */
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acpi_irq_model = ACPI_IRQ_MODEL_PLATFORM;
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acpi_bus_register_driver(&acpi_sn_hubdev_driver);
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status = sal_ioif_init(&result);
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if (status || result)
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panic("sal_ioif_init failed: [%lx] %s\n",
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status, ia64_sal_strerror(status));
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}
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