arch/frv/mb93090-mb00/pci-iomap.c

   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
  14 void __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
  29 EXPORT_SYMBOL(pci_iomap);