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 EXPORT_SYMBOL(ioport_map);
  21
  22 void ioport_unmap(void __iomem *addr)
  23 {
  24         /* Nothing .. */
  25 }
  26 EXPORT_SYMBOL(ioport_unmap);
  27
  28 #ifdef CONFIG_PCI
  29 void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
  30 {
  31         unsigned long start = pci_resource_start(dev, bar);
  32         unsigned long len = pci_resource_len(dev, bar);
  33         unsigned long flags = pci_resource_flags(dev, bar);
  34
  35         if (!len)
  36                 return NULL;
  37         if (max && len > max)
  38                 len = max;
  39         if (flags & IORESOURCE_IO)
  40                 return ioport_map(start + pciio_virt, len);
  41         if (flags & IORESOURCE_MEM)
  42                 return (void __iomem *)start;
  43
  44         /* What? */
  45         return NULL;
  46 }
  47 EXPORT_SYMBOL(pci_iomap);
  48
  49 void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
  50 {
  51         /* Nothing .. */
  52 }
  53 EXPORT_SYMBOL(pci_iounmap);
  54 #endif