arch/sh64/lib/iomap.c

   1 /*
   2  * arch/sh64/lib/iomap.c
   3  *
   4  * Generic sh64 iomap interface
   5  *
   6  * Copyright (C) 2004  Paul Mundt
   7  *
   8  * This file is subject to the terms and conditions of the GNU General Public
   9  * License.  See the file "COPYING" in the main directory of this archive
  10  * for more details.
  11  */
  12 #include <linux/pci.h>
  13 #include <asm/io.h>
  14
  15 void __iomem *__attribute__ ((weak))
  16 ioport_map(unsigned long port, unsigned int len)
  17 {
  18         return (void __iomem *)port;
  19 }
  20
  21 void ioport_unmap(void __iomem *addr)
  22 {
  23         /* Nothing .. */
  24 }
  25
  26 void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
  27 {
  28         unsigned long start = pci_resource_start(dev, bar);
  29         unsigned long len = pci_resource_len(dev, bar);
  30         unsigned long flags = pci_resource_flags(dev, bar);
  31
  32         if (!len)
  33                 return NULL;
  34         if (max && len > max)
  35                 len = max;
  36         if (flags & IORESOURCE_IO)
  37                 return ioport_map(start + pciio_virt, len);
  38         if (flags & IORESOURCE_MEM)
  39                 return (void __iomem *)start;
  40
  41         /* What? */
  42         return NULL;
  43 }
  44
  45 void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
  46 {
  47         /* Nothing .. */
  48 }
  49
  50 EXPORT_SYMBOL(ioport_map);
  51 EXPORT_SYMBOL(ioport_unmap);
  52 EXPORT_SYMBOL(pci_iomap);
  53 EXPORT_SYMBOL(pci_iounmap);
  54