30 lines
853 B
C
30 lines
853 B
C
/* pci-iomap.c: description
|
|
*
|
|
* Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* 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.
|
|
*/
|
|
#include <linux/pci.h>
|
|
#include <linux/module.h>
|
|
|
|
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
|
|
{
|
|
unsigned long start = pci_resource_start(dev, bar);
|
|
unsigned long len = pci_resource_len(dev, bar);
|
|
unsigned long flags = pci_resource_flags(dev, bar);
|
|
|
|
if (!len || !start)
|
|
return NULL;
|
|
|
|
if ((flags & IORESOURCE_IO) || (flags & IORESOURCE_MEM))
|
|
return (void __iomem *) start;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
EXPORT_SYMBOL(pci_iomap);
|