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 14struct 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 */ 22enum { 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 40extern void iotable_init(struct map_desc *, int); 41extern void vm_reserve_area_early(unsigned long addr, unsigned long size, 42 void *caller); 43extern void create_mapping_late(struct mm_struct *mm, struct map_desc *md, 44 bool ng); 45 46#ifdef CONFIG_DEBUG_LL 47extern void debug_ll_addr(unsigned long *paddr, unsigned long *vaddr); 48extern void debug_ll_io_init(void); 49#else 50static inline void debug_ll_io_init(void) {} 51#endif 52 53struct mem_type; 54extern const struct mem_type *get_mem_type(unsigned int type); 55/* 56 * external interface to remap single page with appropriate type 57 */ 58extern 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