Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 942 insertions, 0 deletions

diff --git a/arch/ppc64/kernel/pci.c b/arch/ppc64/kernel/pci.c
new file mode 100644
index 000000000000..fdd8f7869a68
--- /dev/null
+++ b/arch/ppc64/kernel/pci.c
@@ -0,0 +1,942 @@
+/*
+ * Port for PPC64 David Engebretsen, IBM Corp.
+ * Contains common pci routines for ppc64 platform, pSeries and iSeries brands.
+ * 
+ * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
+ *   Rework, based on alpha PCI code.
+ *
+ *      This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+#undef DEBUG
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/mm.h>
+#include <linux/list.h>
+
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
+#include <asm/byteorder.h>
+#include <asm/irq.h>
+#include <asm/machdep.h>
+#include <asm/udbg.h>
+
+#include "pci.h"
+
+#ifdef DEBUG
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+unsigned long pci_probe_only = 1;
+unsigned long pci_assign_all_buses = 0;
+
+/*
+ * legal IO pages under MAX_ISA_PORT.  This is to ensure we don't touch
+ * devices we don't have access to.
+ */
+unsigned long io_page_mask;
+
+EXPORT_SYMBOL(io_page_mask);
+
+
+unsigned int pcibios_assign_all_busses(void)
+{
+        return pci_assign_all_buses;
+}
+
+/* pci_io_base -- the base address from which io bars are offsets.
+ * This is the lowest I/O base address (so bar values are always positive),
+ * and it *must* be the start of ISA space if an ISA bus exists because
+ * ISA drivers use hard coded offsets.  If no ISA bus exists a dummy
+ * page is mapped and isa_io_limit prevents access to it.
+ */
+unsigned long isa_io_base;      /* NULL if no ISA bus */
+EXPORT_SYMBOL(isa_io_base);
+unsigned long pci_io_base;
+EXPORT_SYMBOL(pci_io_base);
+
+void iSeries_pcibios_init(void);
+
+LIST_HEAD(hose_list);
+
+struct dma_mapping_ops pci_dma_ops;
+EXPORT_SYMBOL(pci_dma_ops);
+
+int global_phb_number;          /* Global phb counter */
+
+/* Cached ISA bridge dev. */
+struct pci_dev *ppc64_isabridge_dev = NULL;
+
+static void fixup_broken_pcnet32(struct pci_dev* dev)
+{
+        if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) {
+                dev->vendor = PCI_VENDOR_ID_AMD;
+                pci_write_config_word(dev, PCI_VENDOR_ID, PCI_VENDOR_ID_AMD);
+                pci_name_device(dev);
+        }
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID, fixup_broken_pcnet32);
+
+void  pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
+                              struct resource *res)
+{
+        unsigned long offset = 0;
+        struct pci_controller *hose = pci_bus_to_host(dev->bus);
+
+        if (!hose)
+                return;
+
+        if (res->flags & IORESOURCE_IO)
+                offset = (unsigned long)hose->io_base_virt - pci_io_base;
+
+        if (res->flags & IORESOURCE_MEM)
+                offset = hose->pci_mem_offset;
+
+        region->start = res->start - offset;
+        region->end = res->end - offset;
+}
+
+#ifdef CONFIG_HOTPLUG
+EXPORT_SYMBOL(pcibios_resource_to_bus);
+#endif
+
+/*
+ * We need to avoid collisions with `mirrored' VGA ports
+ * and other strange ISA hardware, so we always want the
+ * addresses to be allocated in the 0x000-0x0ff region
+ * modulo 0x400.
+ *
+ * Why? Because some silly external IO cards only decode
+ * the low 10 bits of the IO address. The 0x00-0xff region
+ * is reserved for motherboard devices that decode all 16
+ * bits, so it's ok to allocate at, say, 0x2800-0x28ff,
+ * but we want to try to avoid allocating at 0x2900-0x2bff
+ * which might have be mirrored at 0x0100-0x03ff..
+ */
+void pcibios_align_resource(void *data, struct resource *res,
+                            unsigned long size, unsigned long align)
+{
+        struct pci_dev *dev = data;
+        struct pci_controller *hose = pci_bus_to_host(dev->bus);
+        unsigned long start = res->start;
+        unsigned long alignto;
+
+        if (res->flags & IORESOURCE_IO) {
+                unsigned long offset = (unsigned long)hose->io_base_virt -
+                                        pci_io_base;
+                /* Make sure we start at our min on all hoses */
+                if (start - offset < PCIBIOS_MIN_IO)
+                        start = PCIBIOS_MIN_IO + offset;
+
+                /*
+                 * Put everything into 0x00-0xff region modulo 0x400
+                 */
+                if (start & 0x300)
+                        start = (start + 0x3ff) & ~0x3ff;
+
+        } else if (res->flags & IORESOURCE_MEM) {
+                /* Make sure we start at our min on all hoses */
+                if (start - hose->pci_mem_offset < PCIBIOS_MIN_MEM)
+                        start = PCIBIOS_MIN_MEM + hose->pci_mem_offset;
+
+                /* Align to multiple of size of minimum base.  */
+                alignto = max(0x1000UL, align);
+                start = ALIGN(start, alignto);
+        }
+
+        res->start = start;
+}
+
+static DEFINE_SPINLOCK(hose_spinlock);
+
+/*
+ * pci_controller(phb) initialized common variables.
+ */
+void __devinit pci_setup_pci_controller(struct pci_controller *hose)
+{
+        memset(hose, 0, sizeof(struct pci_controller));
+
+        spin_lock(&hose_spinlock);
+        hose->global_number = global_phb_number++;
+        list_add_tail(&hose->list_node, &hose_list);
+        spin_unlock(&hose_spinlock);
+}
+
+static void __init pcibios_claim_one_bus(struct pci_bus *b)
+{
+        struct pci_dev *dev;
+        struct pci_bus *child_bus;
+
+        list_for_each_entry(dev, &b->devices, bus_list) {
+                int i;
+
+                for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+                        struct resource *r = &dev->resource[i];
+
+                        if (r->parent || !r->start || !r->flags)
+                                continue;
+                        pci_claim_resource(dev, i);
+                }
+        }
+
+        list_for_each_entry(child_bus, &b->children, node)
+                pcibios_claim_one_bus(child_bus);
+}
+
+#ifndef CONFIG_PPC_ISERIES
+static void __init pcibios_claim_of_setup(void)
+{
+        struct pci_bus *b;
+
+        list_for_each_entry(b, &pci_root_buses, node)
+                pcibios_claim_one_bus(b);
+}
+#endif
+
+static int __init pcibios_init(void)
+{
+        struct pci_controller *hose, *tmp;
+        struct pci_bus *bus;
+
+        /* For now, override phys_mem_access_prot. If we need it,
+         * later, we may move that initialization to each ppc_md
+         */
+        ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
+
+#ifdef CONFIG_PPC_ISERIES
+        iSeries_pcibios_init(); 
+#endif
+
+        printk("PCI: Probing PCI hardware\n");
+
+        /* Scan all of the recorded PCI controllers.  */
+        list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
+                hose->last_busno = 0xff;
+                bus = pci_scan_bus(hose->first_busno, hose->ops,
+                                   hose->arch_data);
+                hose->bus = bus;
+                hose->last_busno = bus->subordinate;
+        }
+
+#ifndef CONFIG_PPC_ISERIES
+        if (pci_probe_only)
+                pcibios_claim_of_setup();
+        else
+                /* FIXME: `else' will be removed when
+                   pci_assign_unassigned_resources() is able to work
+                   correctly with [partially] allocated PCI tree. */
+                pci_assign_unassigned_resources();
+#endif /* !CONFIG_PPC_ISERIES */
+
+        /* Call machine dependent final fixup */
+        if (ppc_md.pcibios_fixup)
+                ppc_md.pcibios_fixup();
+
+        /* Cache the location of the ISA bridge (if we have one) */
+        ppc64_isabridge_dev = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL);
+        if (ppc64_isabridge_dev != NULL)
+                printk("ISA bridge at %s\n", pci_name(ppc64_isabridge_dev));
+
+        printk("PCI: Probing PCI hardware done\n");
+
+        return 0;
+}
+
+subsys_initcall(pcibios_init);
+
+char __init *pcibios_setup(char *str)
+{
+        return str;
+}
+
+int pcibios_enable_device(struct pci_dev *dev, int mask)
+{
+        u16 cmd, oldcmd;
+        int i;
+
+        pci_read_config_word(dev, PCI_COMMAND, &cmd);
+        oldcmd = cmd;
+
+        for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+                struct resource *res = &dev->resource[i];
+
+                /* Only set up the requested stuff */
+                if (!(mask & (1<<i)))
+                        continue;
+
+                if (res->flags & IORESOURCE_IO)
+                        cmd |= PCI_COMMAND_IO;
+                if (res->flags & IORESOURCE_MEM)
+                        cmd |= PCI_COMMAND_MEMORY;
+        }
+
+        if (cmd != oldcmd) {
+                printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
+                       pci_name(dev), cmd);
+                /* Enable the appropriate bits in the PCI command register.  */
+                pci_write_config_word(dev, PCI_COMMAND, cmd);
+        }
+        return 0;
+}
+
+/*
+ * Return the domain number for this bus.
+ */
+int pci_domain_nr(struct pci_bus *bus)
+{
+#ifdef CONFIG_PPC_ISERIES
+        return 0;
+#else
+        struct pci_controller *hose = pci_bus_to_host(bus);
+
+        return hose->global_number;
+#endif
+}
+
+EXPORT_SYMBOL(pci_domain_nr);
+
+/* Decide whether to display the domain number in /proc */
+int pci_proc_domain(struct pci_bus *bus)
+{
+#ifdef CONFIG_PPC_ISERIES
+        return 0;
+#else
+        struct pci_controller *hose = pci_bus_to_host(bus);
+        return hose->buid;
+#endif
+}
+
+/*
+ * Platform support for /proc/bus/pci/X/Y mmap()s,
+ * modelled on the sparc64 implementation by Dave Miller.
+ *  -- paulus.
+ */
+
+/*
+ * Adjust vm_pgoff of VMA such that it is the physical page offset
+ * corresponding to the 32-bit pci bus offset for DEV requested by the user.
+ *
+ * Basically, the user finds the base address for his device which he wishes
+ * to mmap.  They read the 32-bit value from the config space base register,
+ * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
+ * offset parameter of mmap on /proc/bus/pci/XXX for that device.
+ *
+ * Returns negative error code on failure, zero on success.
+ */
+static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
+                                               unsigned long *offset,
+                                               enum pci_mmap_state mmap_state)
+{
+        struct pci_controller *hose = pci_bus_to_host(dev->bus);
+        unsigned long io_offset = 0;
+        int i, res_bit;
+
+        if (hose == 0)
+                return NULL;            /* should never happen */
+
+        /* If memory, add on the PCI bridge address offset */
+        if (mmap_state == pci_mmap_mem) {
+                *offset += hose->pci_mem_offset;
+                res_bit = IORESOURCE_MEM;
+        } else {
+                io_offset = (unsigned long)hose->io_base_virt;
+                *offset += io_offset;
+                res_bit = IORESOURCE_IO;
+        }
+
+        /*
+         * Check that the offset requested corresponds to one of the
+         * resources of the device.
+         */
+        for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
+                struct resource *rp = &dev->resource[i];
+                int flags = rp->flags;
+
+                /* treat ROM as memory (should be already) */
+                if (i == PCI_ROM_RESOURCE)
+                        flags |= IORESOURCE_MEM;
+
+                /* Active and same type? */
+                if ((flags & res_bit) == 0)
+                        continue;
+
+                /* In the range of this resource? */
+                if (*offset < (rp->start & PAGE_MASK) || *offset > rp->end)
+                        continue;
+
+                /* found it! construct the final physical address */
+                if (mmap_state == pci_mmap_io)
+                        *offset += hose->io_base_phys - io_offset;
+                return rp;
+        }
+
+        return NULL;
+}
+
+/*
+ * Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
+ * device mapping.
+ */
+static pgprot_t __pci_mmap_set_pgprot(struct pci_dev *dev, struct resource *rp,
+                                      pgprot_t protection,
+                                      enum pci_mmap_state mmap_state,
+                                      int write_combine)
+{
+        unsigned long prot = pgprot_val(protection);
+
+        /* Write combine is always 0 on non-memory space mappings. On
+         * memory space, if the user didn't pass 1, we check for a
+         * "prefetchable" resource. This is a bit hackish, but we use
+         * this to workaround the inability of /sysfs to provide a write
+         * combine bit
+         */
+        if (mmap_state != pci_mmap_mem)
+                write_combine = 0;
+        else if (write_combine == 0) {
+                if (rp->flags & IORESOURCE_PREFETCH)
+                        write_combine = 1;
+        }
+
+        /* XXX would be nice to have a way to ask for write-through */
+        prot |= _PAGE_NO_CACHE;
+        if (write_combine)
+                prot &= ~_PAGE_GUARDED;
+        else
+                prot |= _PAGE_GUARDED;
+
+        printk("PCI map for %s:%lx, prot: %lx\n", pci_name(dev), rp->start,
+               prot);
+
+        return __pgprot(prot);
+}
+
+/*
+ * This one is used by /dev/mem and fbdev who have no clue about the
+ * PCI device, it tries to find the PCI device first and calls the
+ * above routine
+ */
+pgprot_t pci_phys_mem_access_prot(struct file *file,
+                                  unsigned long offset,
+                                  unsigned long size,
+                                  pgprot_t protection)
+{
+        struct pci_dev *pdev = NULL;
+        struct resource *found = NULL;
+        unsigned long prot = pgprot_val(protection);
+        int i;
+
+        if (page_is_ram(offset >> PAGE_SHIFT))
+                return prot;
+
+        prot |= _PAGE_NO_CACHE | _PAGE_GUARDED;
+
+        for_each_pci_dev(pdev) {
+                for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
+                        struct resource *rp = &pdev->resource[i];
+                        int flags = rp->flags;
+
+                        /* Active and same type? */
+                        if ((flags & IORESOURCE_MEM) == 0)
+                                continue;
+                        /* In the range of this resource? */
+                        if (offset < (rp->start & PAGE_MASK) ||
+                            offset > rp->end)
+                                continue;
+                        found = rp;
+                        break;
+                }
+                if (found)
+                        break;
+        }
+        if (found) {
+                if (found->flags & IORESOURCE_PREFETCH)
+                        prot &= ~_PAGE_GUARDED;
+                pci_dev_put(pdev);
+        }
+
+        DBG("non-PCI map for %lx, prot: %lx\n", offset, prot);
+
+        return __pgprot(prot);
+}
+
+
+/*
+ * Perform the actual remap of the pages for a PCI device mapping, as
+ * appropriate for this architecture.  The region in the process to map
+ * is described by vm_start and vm_end members of VMA, the base physical
+ * address is found in vm_pgoff.
+ * The pci device structure is provided so that architectures may make mapping
+ * decisions on a per-device or per-bus basis.
+ *
+ * Returns a negative error code on failure, zero on success.
+ */
+int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
+                        enum pci_mmap_state mmap_state,
+                        int write_combine)
+{
+        unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
+        struct resource *rp;
+        int ret;
+
+        rp = __pci_mmap_make_offset(dev, &offset, mmap_state);
+        if (rp == NULL)
+                return -EINVAL;
+
+        vma->vm_pgoff = offset >> PAGE_SHIFT;
+        vma->vm_flags |= VM_SHM | VM_LOCKED | VM_IO;
+        vma->vm_page_prot = __pci_mmap_set_pgprot(dev, rp,
+                                                  vma->vm_page_prot,
+                                                  mmap_state, write_combine);
+
+        ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
+                               vma->vm_end - vma->vm_start, vma->vm_page_prot);
+
+        return ret;
+}
+
+#ifdef CONFIG_PPC_MULTIPLATFORM
+static ssize_t pci_show_devspec(struct device *dev, char *buf)
+{
+        struct pci_dev *pdev;
+        struct device_node *np;
+
+        pdev = to_pci_dev (dev);
+        np = pci_device_to_OF_node(pdev);
+        if (np == NULL || np->full_name == NULL)
+                return 0;
+        return sprintf(buf, "%s", np->full_name);
+}
+static DEVICE_ATTR(devspec, S_IRUGO, pci_show_devspec, NULL);
+#endif /* CONFIG_PPC_MULTIPLATFORM */
+
+void pcibios_add_platform_entries(struct pci_dev *pdev)
+{
+#ifdef CONFIG_PPC_MULTIPLATFORM
+        device_create_file(&pdev->dev, &dev_attr_devspec);
+#endif /* CONFIG_PPC_MULTIPLATFORM */
+}
+
+#ifdef CONFIG_PPC_MULTIPLATFORM
+
+#define ISA_SPACE_MASK 0x1
+#define ISA_SPACE_IO 0x1
+
+static void __devinit pci_process_ISA_OF_ranges(struct device_node *isa_node,
+                                      unsigned long phb_io_base_phys,
+                                      void __iomem * phb_io_base_virt)
+{
+        struct isa_range *range;
+        unsigned long pci_addr;
+        unsigned int isa_addr;
+        unsigned int size;
+        int rlen = 0;
+
+        range = (struct isa_range *) get_property(isa_node, "ranges", &rlen);
+        if (range == NULL || (rlen < sizeof(struct isa_range))) {
+                printk(KERN_ERR "no ISA ranges or unexpected isa range size,"
+                       "mapping 64k\n");
+                __ioremap_explicit(phb_io_base_phys, (unsigned long)phb_io_base_virt, 
+                                   0x10000, _PAGE_NO_CACHE);
+                return; 
+        }
+        
+        /* From "ISA Binding to 1275"
+         * The ranges property is laid out as an array of elements,
+         * each of which comprises:
+         *   cells 0 - 1:       an ISA address
+         *   cells 2 - 4:       a PCI address 
+         *                      (size depending on dev->n_addr_cells)
+         *   cell 5:            the size of the range
+         */
+        if ((range->isa_addr.a_hi && ISA_SPACE_MASK) == ISA_SPACE_IO) {
+                isa_addr = range->isa_addr.a_lo;
+                pci_addr = (unsigned long) range->pci_addr.a_mid << 32 | 
+                        range->pci_addr.a_lo;
+
+                /* Assume these are both zero */
+                if ((pci_addr != 0) || (isa_addr != 0)) {
+                        printk(KERN_ERR "unexpected isa to pci mapping: %s\n",
+                                        __FUNCTION__);
+                        return;
+                }
+                
+                size = PAGE_ALIGN(range->size);
+
+                __ioremap_explicit(phb_io_base_phys, 
+                                   (unsigned long) phb_io_base_virt, 
+                                   size, _PAGE_NO_CACHE);
+        }
+}
+
+void __devinit pci_process_bridge_OF_ranges(struct pci_controller *hose,
+                                            struct device_node *dev)
+{
+        unsigned int *ranges;
+        unsigned long size;
+        int rlen = 0;
+        int memno = 0;
+        struct resource *res;
+        int np, na = prom_n_addr_cells(dev);
+        unsigned long pci_addr, cpu_phys_addr;
+
+        np = na + 5;
+
+        /* From "PCI Binding to 1275"
+         * The ranges property is laid out as an array of elements,
+         * each of which comprises:
+         *   cells 0 - 2:       a PCI address
+         *   cells 3 or 3+4:    a CPU physical address
+         *                      (size depending on dev->n_addr_cells)
+         *   cells 4+5 or 5+6:  the size of the range
+         */
+        rlen = 0;
+        hose->io_base_phys = 0;
+        ranges = (unsigned int *) get_property(dev, "ranges", &rlen);
+        while ((rlen -= np * sizeof(unsigned int)) >= 0) {
+                res = NULL;
+                pci_addr = (unsigned long)ranges[1] << 32 | ranges[2];
+
+                cpu_phys_addr = ranges[3];
+                if (na == 2)
+                        cpu_phys_addr = cpu_phys_addr << 32 | ranges[4];
+
+                size = (unsigned long)ranges[na+3] << 32 | ranges[na+4];
+                if (size == 0)
+                        continue;
+                switch ((ranges[0] >> 24) & 0x3) {
+                case 1:         /* I/O space */
+                        hose->io_base_phys = cpu_phys_addr;
+                        hose->pci_io_size = size;
+
+                        res = &hose->io_resource;
+                        res->flags = IORESOURCE_IO;
+                        res->start = pci_addr;
+                        DBG("phb%d: IO 0x%lx -> 0x%lx\n", hose->global_number,
+                                    res->start, res->start + size - 1);
+                        break;
+                case 2:         /* memory space */
+                        memno = 0;
+                        while (memno < 3 && hose->mem_resources[memno].flags)
+                                ++memno;
+
+                        if (memno == 0)
+                                hose->pci_mem_offset = cpu_phys_addr - pci_addr;
+                        if (memno < 3) {
+                                res = &hose->mem_resources[memno];
+                                res->flags = IORESOURCE_MEM;
+                                res->start = cpu_phys_addr;
+                                DBG("phb%d: MEM 0x%lx -> 0x%lx\n", hose->global_number,
+                                            res->start, res->start + size - 1);
+                        }
+                        break;
+                }
+                if (res != NULL) {
+                        res->name = dev->full_name;
+                        res->end = res->start + size - 1;
+                        res->parent = NULL;
+                        res->sibling = NULL;
+                        res->child = NULL;
+                }
+                ranges += np;
+        }
+}
+
+void __init pci_setup_phb_io(struct pci_controller *hose, int primary)
+{
+        unsigned long size = hose->pci_io_size;
+        unsigned long io_virt_offset;
+        struct resource *res;
+        struct device_node *isa_dn;
+
+        hose->io_base_virt = reserve_phb_iospace(size);
+        DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n",
+                hose->global_number, hose->io_base_phys,
+                (unsigned long) hose->io_base_virt);
+
+        if (primary) {
+                pci_io_base = (unsigned long)hose->io_base_virt;
+                isa_dn = of_find_node_by_type(NULL, "isa");
+                if (isa_dn) {
+                        isa_io_base = pci_io_base;
+                        pci_process_ISA_OF_ranges(isa_dn, hose->io_base_phys,
+                                                hose->io_base_virt);
+                        of_node_put(isa_dn);
+                        /* Allow all IO */
+                        io_page_mask = -1;
+                }
+        }
+
+        io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base;
+        res = &hose->io_resource;
+        res->start += io_virt_offset;
+        res->end += io_virt_offset;
+}
+
+void __devinit pci_setup_phb_io_dynamic(struct pci_controller *hose,
+                                        int primary)
+{
+        unsigned long size = hose->pci_io_size;
+        unsigned long io_virt_offset;
+        struct resource *res;
+
+        hose->io_base_virt = __ioremap(hose->io_base_phys, size,
+                                        _PAGE_NO_CACHE);
+        DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n",
+                hose->global_number, hose->io_base_phys,
+                (unsigned long) hose->io_base_virt);
+
+        if (primary)
+                pci_io_base = (unsigned long)hose->io_base_virt;
+
+        io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base;
+        res = &hose->io_resource;
+        res->start += io_virt_offset;
+        res->end += io_virt_offset;
+}
+
+
+static int get_bus_io_range(struct pci_bus *bus, unsigned long *start_phys,
+                                unsigned long *start_virt, unsigned long *size)
+{
+        struct pci_controller *hose = pci_bus_to_host(bus);
+        struct pci_bus_region region;
+        struct resource *res;
+
+        if (bus->self) {
+                res = bus->resource[0];
+                pcibios_resource_to_bus(bus->self, &region, res);
+                *start_phys = hose->io_base_phys + region.start;
+                *start_virt = (unsigned long) hose->io_base_virt + 
+                                region.start;
+                if (region.end > region.start) 
+                        *size = region.end - region.start + 1;
+                else {
+                        printk("%s(): unexpected region 0x%lx->0x%lx\n", 
+                                        __FUNCTION__, region.start, region.end);
+                        return 1;
+                }
+                
+        } else {
+                /* Root Bus */
+                res = &hose->io_resource;
+                *start_phys = hose->io_base_phys;
+                *start_virt = (unsigned long) hose->io_base_virt;
+                if (res->end > res->start)
+                        *size = res->end - res->start + 1;
+                else {
+                        printk("%s(): unexpected region 0x%lx->0x%lx\n", 
+                                        __FUNCTION__, res->start, res->end);
+                        return 1;
+                }
+        }
+
+        return 0;
+}
+
+int unmap_bus_range(struct pci_bus *bus)
+{
+        unsigned long start_phys;
+        unsigned long start_virt;
+        unsigned long size;
+
+        if (!bus) {
+                printk(KERN_ERR "%s() expected bus\n", __FUNCTION__);
+                return 1;
+        }
+        
+        if (get_bus_io_range(bus, &start_phys, &start_virt, &size))
+                return 1;
+        if (iounmap_explicit((void __iomem *) start_virt, size))
+                return 1;
+
+        return 0;
+}
+EXPORT_SYMBOL(unmap_bus_range);
+
+int remap_bus_range(struct pci_bus *bus)
+{
+        unsigned long start_phys;
+        unsigned long start_virt;
+        unsigned long size;
+
+        if (!bus) {
+                printk(KERN_ERR "%s() expected bus\n", __FUNCTION__);
+                return 1;
+        }
+        
+        
+        if (get_bus_io_range(bus, &start_phys, &start_virt, &size))
+                return 1;
+        printk("mapping IO %lx -> %lx, size: %lx\n", start_phys, start_virt, size);
+        if (__ioremap_explicit(start_phys, start_virt, size, _PAGE_NO_CACHE))
+                return 1;
+
+        return 0;
+}
+EXPORT_SYMBOL(remap_bus_range);
+
+void phbs_remap_io(void)
+{
+        struct pci_controller *hose, *tmp;
+
+        list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
+                remap_bus_range(hose->bus);
+}
+
+/*
+ * ppc64 can have multifunction devices that do not respond to function 0.
+ * In this case we must scan all functions.
+ */
+int pcibios_scan_all_fns(struct pci_bus *bus, int devfn)
+{
+       struct device_node *busdn, *dn;
+
+       if (bus->self)
+               busdn = pci_device_to_OF_node(bus->self);
+       else
+               busdn = bus->sysdata;   /* must be a phb */
+
+       if (busdn == NULL)
+               return 0;
+
+       /*
+        * Check to see if there is any of the 8 functions are in the
+        * device tree.  If they are then we need to scan all the
+        * functions of this slot.
+        */
+       for (dn = busdn->child; dn; dn = dn->sibling)
+               if ((dn->devfn >> 3) == (devfn >> 3))
+                       return 1;
+
+       return 0;
+}
+
+
+void __devinit pcibios_fixup_device_resources(struct pci_dev *dev,
+                                           struct pci_bus *bus)
+{
+        /* Update device resources.  */
+        struct pci_controller *hose = pci_bus_to_host(bus);
+        int i;
+
+        for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+                if (dev->resource[i].flags & IORESOURCE_IO) {
+                        unsigned long offset = (unsigned long)hose->io_base_virt
+                                - pci_io_base;
+                        unsigned long start, end, mask;
+
+                        start = dev->resource[i].start += offset;
+                        end = dev->resource[i].end += offset;
+
+                        /* Need to allow IO access to pages that are in the
+                           ISA range */
+                        if (start < MAX_ISA_PORT) {
+                                if (end > MAX_ISA_PORT)
+                                        end = MAX_ISA_PORT;
+
+                                start >>= PAGE_SHIFT;
+                                end >>= PAGE_SHIFT;
+
+                                /* get the range of pages for the map */
+                                mask = ((1 << (end+1))-1) ^ ((1 << start)-1);
+                                io_page_mask |= mask;
+                        }
+                }
+                else if (dev->resource[i].flags & IORESOURCE_MEM) {
+                        dev->resource[i].start += hose->pci_mem_offset;
+                        dev->resource[i].end += hose->pci_mem_offset;
+                }
+        }
+}
+EXPORT_SYMBOL(pcibios_fixup_device_resources);
+
+void __devinit pcibios_fixup_bus(struct pci_bus *bus)
+{
+        struct pci_controller *hose = pci_bus_to_host(bus);
+        struct pci_dev *dev = bus->self;
+        struct resource *res;
+        int i;
+
+        if (!dev) {
+                /* Root bus. */
+
+                hose->bus = bus;
+                bus->resource[0] = res = &hose->io_resource;
+
+                if (res->flags && request_resource(&ioport_resource, res))
+                        printk(KERN_ERR "Failed to request IO on "
+                                        "PCI domain %d\n", pci_domain_nr(bus));
+
+                for (i = 0; i < 3; ++i) {
+                        res = &hose->mem_resources[i];
+                        bus->resource[i+1] = res;
+                        if (res->flags && request_resource(&iomem_resource, res))
+                                printk(KERN_ERR "Failed to request MEM on "
+                                                "PCI domain %d\n",
+                                                pci_domain_nr(bus));
+                }
+        } else if (pci_probe_only &&
+                   (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
+                /* This is a subordinate bridge */
+
+                pci_read_bridge_bases(bus);
+                pcibios_fixup_device_resources(dev, bus);
+        }
+
+        ppc_md.iommu_bus_setup(bus);
+
+        list_for_each_entry(dev, &bus->devices, bus_list)
+                ppc_md.iommu_dev_setup(dev);
+
+        if (!pci_probe_only)
+                return;
+
+        list_for_each_entry(dev, &bus->devices, bus_list) {
+                if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI)
+                        pcibios_fixup_device_resources(dev, bus);
+        }
+}
+EXPORT_SYMBOL(pcibios_fixup_bus);
+
+/*
+ * Reads the interrupt pin to determine if interrupt is use by card.
+ * If the interrupt is used, then gets the interrupt line from the 
+ * openfirmware and sets it in the pci_dev and pci_config line.
+ */
+int pci_read_irq_line(struct pci_dev *pci_dev)
+{
+        u8 intpin;
+        struct device_node *node;
+
+        pci_read_config_byte(pci_dev, PCI_INTERRUPT_PIN, &intpin);
+        if (intpin == 0)
+                return 0;
+
+        node = pci_device_to_OF_node(pci_dev);
+        if (node == NULL)
+                return -1;
+
+        if (node->n_intrs == 0)
+                return -1;
+
+        pci_dev->irq = node->intrs[0].line;
+
+        pci_write_config_byte(pci_dev, PCI_INTERRUPT_LINE, pci_dev->irq);
+
+        return 0;
+}
+EXPORT_SYMBOL(pci_read_irq_line);
+
+#endif /* CONFIG_PPC_MULTIPLATFORM */