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