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
  41 void __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
  49 void iounmap(volatile void __iomem *addr)
  50 {
  51 }
  52