release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/include/asm/mach/map.h

   1 /*
   2  *  arch/arm/include/asm/map.h
   3  *
   4  *  Copyright (C) 1999-2000 Russell King
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  *  Page table mapping constructs and function prototypes
  11  */
  12 #include <asm/io.h>
  13
  14 struct map_desc {
  15         unsigned long virtual;
  16         unsigned long pfn;
  17         unsigned long length;
  18         unsigned int type;
  19 };
  20
  21 /* types 0-3 are defined in asm/io.h */
  22 #define MT_UNCACHED             4
  23 #define MT_CACHECLEAN           5
  24 #define MT_MINICLEAN            6
  25 #define MT_LOW_VECTORS          7
  26 #define MT_HIGH_VECTORS         8
  27 #define MT_MEMORY               9
  28 #define MT_ROM                  10
  29 #define MT_MEMORY_NONCACHED     11
  30 #define MT_MEMORY_DTCM          12
  31 #define MT_MEMORY_ITCM          13
  32
  33 #ifdef CONFIG_MMU
  34 extern void iotable_init(struct map_desc *, int);
  35
  36 struct mem_type;
  37 extern const struct mem_type *get_mem_type(unsigned int type);
  38 /*
  39  * external interface to remap single page with appropriate type
  40  */
  41 extern int ioremap_page(unsigned long virt, unsigned long phys,
  42                         const struct mem_type *mtype);
  43 #else
  44 #define iotable_init(map,num)   do { } while (0)
  45 #endif