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

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  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
 65 

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