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 #ifndef __ASM_MACH_MAP_H
  13 #define __ASM_MACH_MAP_H
  14
  15 #include <asm/io.h>
  16
  17 struct map_desc {
  18         unsigned long virtual;
  19         unsigned long pfn;
  20         unsigned long length;
  21         unsigned int type;
  22 };
  23
  24 /* types 0-3 are defined in asm/io.h */
  25 enum {
  26         MT_UNCACHED = 4,
  27         MT_CACHECLEAN,
  28         MT_MINICLEAN,
  29         MT_LOW_VECTORS,
  30         MT_HIGH_VECTORS,
  31         MT_MEMORY_RWX,
  32         MT_MEMORY_RW,
  33         MT_ROM,
  34         MT_MEMORY_RWX_NONCACHED,
  35         MT_MEMORY_RW_DTCM,
  36         MT_MEMORY_RWX_ITCM,
  37         MT_MEMORY_RW_SO,
  38         MT_MEMORY_DMA_READY,
  39 };
  40
  41 #ifdef CONFIG_MMU
  42 extern void iotable_init(struct map_desc *, int);
  43 extern void vm_reserve_area_early(unsigned long addr, unsigned long size,
  44                                   void *caller);
  45 extern void create_mapping_late(struct mm_struct *mm, struct map_desc *md,
  46                                 bool ng);
  47
  48 #ifdef CONFIG_DEBUG_LL
  49 extern void debug_ll_addr(unsigned long *paddr, unsigned long *vaddr);
  50 extern void debug_ll_io_init(void);
  51 #else
  52 static inline void debug_ll_io_init(void) {}
  53 #endif
  54
  55 struct mem_type;
  56 extern const struct mem_type *get_mem_type(unsigned int type);
  57 /*
  58  * external interface to remap single page with appropriate type
  59  */
  60 extern int ioremap_page(unsigned long virt, unsigned long phys,
  61                         const struct mem_type *mtype);
  62 #else
  63 #define iotable_init(map,num)   do { } while (0)
  64 #define vm_reserve_area_early(a,s,c)    do { } while (0)
  65 #endif
  66
  67 #endif