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_MEMORY_RO, 31 MT_ROM, 32 MT_MEMORY_RWX_NONCACHED, 33 MT_MEMORY_RW_DTCM, 34 MT_MEMORY_RWX_ITCM, 35 MT_MEMORY_RW_SO, 36 MT_MEMORY_DMA_READY, 37 }; 38 39 #ifdef CONFIG_MMU 40 extern void iotable_init(struct map_desc *, int); 41 extern void vm_reserve_area_early(unsigned long addr, unsigned long size, 42 void *caller); 43 extern void create_mapping_late(struct mm_struct *mm, struct map_desc *md, 44 bool ng); 45 46 #ifdef CONFIG_DEBUG_LL 47 extern void debug_ll_addr(unsigned long *paddr, unsigned long *vaddr); 48 extern void debug_ll_io_init(void); 49 #else debug_ll_io_init(void)50 static inline void debug_ll_io_init(void) {} 51 #endif 52 53 struct mem_type; 54 extern const struct mem_type *get_mem_type(unsigned int type); 55 /* 56 * external interface to remap single page with appropriate type 57 */ 58 extern int ioremap_page(unsigned long virt, unsigned long phys, 59 const struct mem_type *mtype); 60 #else 61 #define iotable_init(map,num) do { } while (0) 62 #define vm_reserve_area_early(a,s,c) do { } while (0) 63 #endif 64 65 #endif 66