iomap-pci.c

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/*
 * Implement the default iomap interfaces
 *
 * (C) Copyright 2004 Linus Torvalds
 * (C) Copyright 2006 Ralf Baechle <[email protected]>
 * (C) Copyright 2007 MIPS Technologies, Inc.
 *     written by Ralf Baechle <[email protected]>
 */
#include <linux/pci.h>
#include <linux/module.h>
#include <asm/io.h>

void __iomem *__pci_ioport_map(struct pci_dev *dev,
                   unsigned long port, unsigned int nr)
{
    struct pci_controller *ctrl = dev->bus->sysdata;
    unsigned long base = ctrl->io_map_base;

    /* This will eventually become a BUG_ON but for now be gentle */
    if (unlikely(!ctrl->io_map_base)) {
        struct pci_bus *bus = dev->bus;
        char name[8];

        while (bus->parent)
            bus = bus->parent;

        ctrl->io_map_base = base = mips_io_port_base;

        sprintf(name, "%04x:%02x", pci_domain_nr(bus), bus->number);
        printk(KERN_WARNING "io_map_base of root PCI bus %s unset.  "
               "Trying to continue but you better\nfix this issue or "
               "report it to [email protected] or your "
               "vendor.\n", name);
#ifdef CONFIG_PCI_DOMAINS
        panic("To avoid data corruption io_map_base MUST be set with "
              "multiple PCI domains.");
#endif
    }

    return (void __iomem *) (ctrl->io_map_base + port);
}

void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
{
    iounmap(addr);
}

EXPORT_SYMBOL(pci_iounmap);