LXR linux/arch/mips/lib/iomap-pci.c

   1/*
   2 * Implement the default iomap interfaces
   3 *
   4 * (C) Copyright 2004 Linus Torvalds
   5 * (C) Copyright 2006 Ralf Baechle <ralf@linux-mips.org>
   6 * (C) Copyright 2007 MIPS Technologies, Inc.
   7 *     written by Ralf Baechle <ralf@linux-mips.org>
   8 */
   9#include <linux/pci.h>
  10#include <linux/module.h>
  11#include <asm/io.h>
  12
  13void __iomem *__pci_ioport_map(struct pci_dev *dev,
  14                               unsigned long port, unsigned int nr)
  15{
  16        struct pci_controller *ctrl = dev->bus->sysdata;
  17        unsigned long base = ctrl->io_map_base;
  18
  19        /* This will eventually become a BUG_ON but for now be gentle */
  20        if (unlikely(!ctrl->io_map_base)) {
  21                struct pci_bus *bus = dev->bus;
  22                char name[8];
  23
  24                while (bus->parent)
  25                        bus = bus->parent;
  26
  27                ctrl->io_map_base = base = mips_io_port_base;
  28
  29                sprintf(name, "%04x:%02x", pci_domain_nr(bus), bus->number);
  30                printk(KERN_WARNING "io_map_base of root PCI bus %s unset.  "
  31                       "Trying to continue but you better\nfix this issue or "
  32                       "report it to linux-mips@linux-mips.org or your "
  33                       "vendor.\n", name);
  34#ifdef CONFIG_PCI_DOMAINS
  35                panic("To avoid data corruption io_map_base MUST be set with "
  36                      "multiple PCI domains.");
  37#endif
  38        }
  39
  40        return (void __iomem *) (ctrl->io_map_base + port);
  41}
  42
  43void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
  44{
  45        iounmap(addr);
  46}
  47
  48EXPORT_SYMBOL(pci_iounmap);
  49