linux/arch/frv/mb93090-mb00/pci-iomap.c
<<
>>
Prefs
   1/* pci-iomap.c: description
   2 *
   3 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
   4 * Written by David Howells (dhowells@redhat.com)
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public License
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the License, or (at your option) any later version.
  10 */
  11#include <linux/pci.h>
  12#include <linux/module.h>
  13
  14void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
  15{
  16        resource_size_t start = pci_resource_start(dev, bar);
  17        resource_size_t len = pci_resource_len(dev, bar);
  18        unsigned long flags = pci_resource_flags(dev, bar);
  19
  20        if (!len || !start)
  21                return NULL;
  22
  23        if ((flags & IORESOURCE_IO) || (flags & IORESOURCE_MEM))
  24                return (void __iomem *) start;
  25
  26        return NULL;
  27}
  28
  29EXPORT_SYMBOL(pci_iomap);
  30