LXR linux/arch/openrisc/include/asm/io.h

   1/*
   2 * OpenRISC Linux
   3 *
   4 * Linux architectural port borrowing liberally from similar works of
   5 * others.  All original copyrights apply as per the original source
   6 * declaration.
   7 *
   8 * OpenRISC implementation:
   9 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
  10 * et al.
  11 *
  12 * This program is free software; you can redistribute it and/or modify
  13 * it under the terms of the GNU General Public License as published by
  14 * the Free Software Foundation; either version 2 of the License, or
  15 * (at your option) any later version.
  16 */
  17
  18#ifndef __ASM_OPENRISC_IO_H
  19#define __ASM_OPENRISC_IO_H
  20
  21/*
  22 * PCI: can we really do 0 here if we have no port IO?
  23 */
  24#define IO_SPACE_LIMIT          0
  25
  26/* OpenRISC has no port IO */
  27#define HAVE_ARCH_PIO_SIZE      1
  28#define PIO_RESERVED            0X0UL
  29#define PIO_OFFSET              0
  30#define PIO_MASK                0
  31
  32#include <asm-generic/io.h>
  33#include <asm/pgtable.h>
  34
  35extern void __iomem *__ioremap(phys_addr_t offset, unsigned long size,
  36                                pgprot_t prot);
  37
  38static inline void __iomem *ioremap(phys_addr_t offset, unsigned long size)
  39{
  40        return __ioremap(offset, size, PAGE_KERNEL);
  41}
  42
  43/* #define _PAGE_CI       0x002 */
  44static inline void __iomem *ioremap_nocache(phys_addr_t offset,
  45                                             unsigned long size)
  46{
  47        return __ioremap(offset, size,
  48                         __pgprot(pgprot_val(PAGE_KERNEL) | _PAGE_CI));
  49}
  50
  51extern void iounmap(void *addr);
  52#endif
  53