LXR linux/arch/sh/kernel/ioport.c

   1/*
   2 * arch/sh/kernel/ioport.c
   3 *
   4 * Copyright (C) 2000  Niibe Yutaka
   5 * Copyright (C) 2005 - 2007 Paul Mundt
   6 *
   7 * This file is subject to the terms and conditions of the GNU General Public
   8 * License.  See the file "COPYING" in the main directory of this archive
   9 * for more details.
  10 */
  11#include <linux/module.h>
  12#include <linux/io.h>
  13
  14unsigned long sh_io_port_base __read_mostly = -1;
  15EXPORT_SYMBOL(sh_io_port_base);
  16
  17void __iomem *__ioport_map(unsigned long addr, unsigned int size)
  18{
  19        if (sh_mv.mv_ioport_map)
  20                return sh_mv.mv_ioport_map(addr, size);
  21
  22        return (void __iomem *)(addr + sh_io_port_base);
  23}
  24EXPORT_SYMBOL(__ioport_map);
  25
  26void __iomem *ioport_map(unsigned long port, unsigned int nr)
  27{
  28        void __iomem *ret;
  29
  30        ret = __ioport_map_trapped(port, nr);
  31        if (ret)
  32                return ret;
  33
  34        return __ioport_map(port, nr);
  35}
  36EXPORT_SYMBOL(ioport_map);
  37
  38void ioport_unmap(void __iomem *addr)
  39{
  40        if (sh_mv.mv_ioport_unmap)
  41                sh_mv.mv_ioport_unmap(addr);
  42}
  43EXPORT_SYMBOL(ioport_unmap);
  44