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 #endif /* PLAT_XLAT_TABLES_DYNAMIC */ 51 52 /* Print VA, PA, size and attributes of all regions in the mmap array. */ 53 void print_mmap(mmap_region_t *const mmap); 54 55 /* 56 * Print the current state of the translation tables by reading them from 57 * memory. 58 */ 59 void xlat_tables_print(xlat_ctx_t *ctx); 60 61 /* 62 * Architecture-specific initialization code. 63 */ 64 65 /* Returns the current Exception Level. The returned EL must be 1 or higher. */ 66 int xlat_arch_current_el(void); 67 68 /* 69 * Returns the bit mask that has to be ORed to the rest of a translation table 70 * descriptor so that execution of code is prohibited at the given Exception 71 * Level. 72 */ 73 uint64_t xlat_arch_get_xn_desc(int el); 74 75 /* 76 * Return the maximum physical address supported by the hardware. 77 * This value depends on the execution state (AArch32/AArch64). 78 */ 79 unsigned long long xlat_arch_get_max_supported_pa(void); 80 81 /* Enable MMU and configure it to use the specified translation tables. */ 82 void enable_mmu_arch(unsigned int flags, uint64_t *base_table, 83 unsigned long long pa, uintptr_t max_va); 84 85 /* Return 1 if the MMU of this Exception Level is enabled, 0 otherwise. */ 86 int is_mmu_enabled(void); 87 88 #endif /* __XLAT_TABLES_PRIVATE_H__ */ 89