1 /* 2 * Copyright (c) 2017-2021, 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 <stdbool.h> 11 12 #include <platform_def.h> 13 14 #include <lib/xlat_tables/xlat_tables_defs.h> 15 16 #if PLAT_XLAT_TABLES_DYNAMIC 17 /* 18 * Private shifts and masks to access fields of an mmap attribute 19 */ 20 /* Dynamic or static */ 21 #define MT_DYN_SHIFT U(31) 22 23 /* 24 * Memory mapping private attributes 25 * 26 * Private attributes not exposed in the public header. 27 */ 28 29 /* 30 * Regions mapped before the MMU can't be unmapped dynamically (they are 31 * static) and regions mapped with MMU enabled can be unmapped. This 32 * behaviour can't be overridden. 33 * 34 * Static regions can overlap each other, dynamic regions can't. 35 */ 36 #define MT_STATIC (U(0) << MT_DYN_SHIFT) 37 #define MT_DYNAMIC (U(1) << MT_DYN_SHIFT) 38 39 #endif /* PLAT_XLAT_TABLES_DYNAMIC */ 40 41 extern uint64_t mmu_cfg_params[MMU_CFG_PARAM_MAX]; 42 43 /* 44 * Determine the physical address space encoded in the 'attr' parameter for the 45 * context 'ctx'. 46 */ 47 uint32_t xlat_arch_get_pas(const xlat_ctx_t *ctx, uint32_t attr); 48 49 /* 50 * Return the execute-never mask that will prevent instruction fetch at the 51 * given translation regime. 52 */ 53 uint64_t xlat_arch_regime_get_xn_desc(int xlat_regime); 54 55 /* 56 * Invalidate all TLB entries that match the given virtual address. This 57 * operation applies to all PEs in the same Inner Shareable domain as the PE 58 * that executes this function. This functions must be called for every 59 * translation table entry that is modified. It only affects the specified 60 * translation regime. 61 * 62 * Note, however, that it is architecturally UNDEFINED to invalidate TLB entries 63 * pertaining to a higher exception level, e.g. invalidating EL3 entries from 64 * S-EL1. 65 */ 66 void xlat_arch_tlbi_va(uintptr_t va, int xlat_regime); 67 68 /* 69 * This function has to be called at the end of any code that uses the function 70 * xlat_arch_tlbi_va(). 71 */ 72 void xlat_arch_tlbi_va_sync(void); 73 74 /* Print VA, PA, size and attributes of all regions in the mmap array. */ 75 void xlat_mmap_print(const mmap_region_t *mmap); 76 77 /* 78 * Print the current state of the translation tables by reading them from 79 * memory. 80 */ 81 void xlat_tables_print(xlat_ctx_t *ctx); 82 83 /* 84 * Returns a block/page table descriptor for the given level and attributes. 85 */ 86 uint64_t xlat_desc(const xlat_ctx_t *ctx, uint32_t attr, 87 unsigned long long addr_pa, unsigned int level); 88 89 /* 90 * Architecture-specific initialization code. 91 */ 92 93 /* Returns the current Exception Level. The returned EL must be 1 or higher. */ 94 unsigned int xlat_arch_current_el(void); 95 96 /* 97 * Return the maximum physical address supported by the hardware. 98 * This value depends on the execution state (AArch32/AArch64). 99 */ 100 unsigned long long xlat_arch_get_max_supported_pa(void); 101 102 /* 103 * Returns true if the MMU of the translation regime managed by the given 104 * xlat_ctx_t is enabled, false otherwise. 105 */ 106 bool is_mmu_enabled_ctx(const xlat_ctx_t *ctx); 107 108 /* 109 * Returns minimum virtual address space size supported by the architecture 110 */ 111 uintptr_t xlat_get_min_virt_addr_space_size(void); 112 113 #endif /* XLAT_TABLES_PRIVATE_H */ 114