arch/arm/include/asm/mach/map.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  arch/arm/include/asm/map.h
   4  *
   5  *  Copyright (C) 1999-2000 Russell King
   6  *
   7  *  Page table mapping constructs and function prototypes
   8  */
   9 #ifndef __ASM_MACH_MAP_H
  10 #define __ASM_MACH_MAP_H
  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 enum {
  23         MT_UNCACHED = 4,
  24         MT_CACHECLEAN,
  25         MT_MINICLEAN,
  26         MT_LOW_VECTORS,
  27         MT_HIGH_VECTORS,
  28         MT_MEMORY_RWX,
  29         MT_MEMORY_RW,
  30         MT_ROM,
  31         MT_MEMORY_RWX_NONCACHED,
  32         MT_MEMORY_RW_DTCM,
  33         MT_MEMORY_RWX_ITCM,
  34         MT_MEMORY_RW_SO,
  35         MT_MEMORY_DMA_READY,
  36 };
  37
  38 #ifdef CONFIG_MMU
  39 extern void iotable_init(struct map_desc *, int);
  40 extern void vm_reserve_area_early(unsigned long addr, unsigned long size,
  41                                   void *caller);
  42 extern void create_mapping_late(struct mm_struct *mm, struct map_desc *md,
  43                                 bool ng);
  44
  45 #ifdef CONFIG_DEBUG_LL
  46 extern void debug_ll_addr(unsigned long *paddr, unsigned long *vaddr);
  47 extern void debug_ll_io_init(void);
  48 #else
  49 static inline void debug_ll_io_init(void) {}
  50 #endif
  51
  52 struct mem_type;
  53 extern const struct mem_type *get_mem_type(unsigned int type);
  54 /*
  55  * external interface to remap single page with appropriate type
  56  */
  57 extern int ioremap_page(unsigned long virt, unsigned long phys,
  58                         const struct mem_type *mtype);
  59 #else
  60 #define iotable_init(map,num)   do { } while (0)
  61 #define vm_reserve_area_early(a,s,c)    do { } while (0)
  62 #endif
  63
  64 #endif