LXR linux/arch/m32r/mm/ioremap-nommu.c

   1/*
   2 *  linux/arch/m32r/mm/ioremap-nommu.c
   3 *
   4 *  Copyright (c) 2001, 2002  Hiroyuki Kondo
   5 *
   6 *  Taken from mips version.
   7 *    (C) Copyright 1995 1996 Linus Torvalds
   8 *    (C) Copyright 2001 Ralf Baechle
   9 */
  10
  11/*
  12 * This file is subject to the terms and conditions of the GNU General Public
  13 * License.  See the file "COPYING" in the main directory of this archive
  14 * for more details.
  15 *
  16 */
  17
  18#include <linux/module.h>
  19#include <asm/addrspace.h>
  20#include <asm/byteorder.h>
  21
  22#include <linux/vmalloc.h>
  23#include <asm/io.h>
  24#include <asm/pgalloc.h>
  25#include <asm/cacheflush.h>
  26#include <asm/tlbflush.h>
  27
  28
  29/*
  30 * Remap an arbitrary physical address space into the kernel virtual
  31 * address space. Needed when the kernel wants to access high addresses
  32 * directly.
  33 *
  34 * NOTE! We need to allow non-page-aligned mappings too: we will obviously
  35 * have to convert them into an offset in a page-aligned mapping, but the
  36 * caller shouldn't need to know that small detail.
  37 */
  38
  39#define IS_LOW512(addr) (!((unsigned long)(addr) & ~0x1fffffffUL))
  40
  41void __iomem *
  42__ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags)
  43{
  44        return (void *)phys_addr;
  45}
  46
  47#define IS_KSEG1(addr) (((unsigned long)(addr) & ~0x1fffffffUL) == KSEG1)
  48
  49void iounmap(volatile void __iomem *addr)
  50{
  51}
  52
  53