1 /* 2 * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #ifndef __XLAT_TABLES_PRIVATE_H__ 8 #define __XLAT_TABLES_PRIVATE_H__ 9 10 #include <platform_def.h> 11 #include <xlat_tables_defs.h> 12 13 #if PLAT_XLAT_TABLES_DYNAMIC 14 /* 15 * Shifts and masks to access fields of an mmap_attr_t 16 */ 17 /* Dynamic or static */ 18 #define MT_DYN_SHIFT 30 /* 31 would cause undefined behaviours */ 19 20 /* 21 * Memory mapping private attributes 22 * 23 * Private attributes not exposed in the mmap_attr_t enum. 24 */ 25 typedef enum { 26 /* 27 * Regions mapped before the MMU can't be unmapped dynamically (they are 28 * static) and regions mapped with MMU enabled can be unmapped. This 29 * behaviour can't be overridden. 30 * 31 * Static regions can overlap each other, dynamic regions can't. 32 */ 33 MT_STATIC = 0 << MT_DYN_SHIFT, 34 MT_DYNAMIC = 1 << MT_DYN_SHIFT 35 } mmap_priv_attr_t; 36 37 /* 38 * Function used to invalidate all levels of the translation walk for a given 39 * virtual address. It must be called for every translation table entry that is 40 * modified. 41 */ 42 void xlat_arch_tlbi_va(uintptr_t va); 43 44 /* 45 * This function has to be called at the end of any code that uses the function 46 * xlat_arch_tlbi_va(). 47 */ 48 void xlat_arch_tlbi_va_sync(void); 49 50 /* Add a dynamic region to the specified context. */ 51 int mmap_add_dynamic_region_ctx(xlat_ctx_t *ctx, mmap_region_t *mm); 52 53 /* Remove a dynamic region from the specified context. */ 54 int mmap_remove_dynamic_region_ctx(xlat_ctx_t *ctx, uintptr_t base_va, 55 size_t size); 56 57 #endif /* PLAT_XLAT_TABLES_DYNAMIC */ 58 59 /* Print VA, PA, size and attributes of all regions in the mmap array. */ 60 void print_mmap(mmap_region_t *const mmap); 61 62 /* 63 * Print the current state of the translation tables by reading them from 64 * memory. 65 */ 66 void xlat_tables_print(xlat_ctx_t *ctx); 67 68 /* 69 * Initialize the translation tables by mapping all regions added to the 70 * specified context. 71 */ 72 void init_xlation_table(xlat_ctx_t *ctx); 73 74 /* Add a static region to the specified context. */ 75 void mmap_add_region_ctx(xlat_ctx_t *ctx, mmap_region_t *mm); 76 77 /* 78 * Architecture-specific initialization code. 79 */ 80 81 /* Returns the current Exception Level. The returned EL must be 1 or higher. */ 82 int xlat_arch_current_el(void); 83 84 /* 85 * Returns the bit mask that has to be ORed to the rest of a translation table 86 * descriptor so that execution of code is prohibited at the given Exception 87 * Level. 88 */ 89 uint64_t xlat_arch_get_xn_desc(int el); 90 91 /* Execute architecture-specific translation table initialization code. */ 92 void init_xlat_tables_arch(unsigned long long max_pa); 93 94 /* Enable MMU and configure it to use the specified translation tables. */ 95 void enable_mmu_arch(unsigned int flags, uint64_t *base_table); 96 97 /* Return 1 if the MMU of this Exception Level is enabled, 0 otherwise. */ 98 int is_mmu_enabled(void); 99 100 #endif /* __XLAT_TABLES_PRIVATE_H__ */ 101