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 #endif /* PLAT_XLAT_TABLES_DYNAMIC */ 38 39 /* 40 * Invalidate all TLB entries that match the given virtual address. This 41 * operation applies to all PEs in the same Inner Shareable domain as the PE 42 * that executes this function. This functions must be called for every 43 * translation table entry that is modified. 44 * 45 * xlat_arch_tlbi_va() applies the invalidation to the exception level of the 46 * current translation regime, whereas xlat_arch_tlbi_va_regime() applies it to 47 * the given translation regime. 48 * 49 * Note, however, that it is architecturally UNDEFINED to invalidate TLB entries 50 * pertaining to a higher exception level, e.g. invalidating EL3 entries from 51 * S-EL1. 52 */ 53 void xlat_arch_tlbi_va(uintptr_t va); 54 void xlat_arch_tlbi_va_regime(uintptr_t va, xlat_regime_t xlat_regime); 55 56 /* 57 * This function has to be called at the end of any code that uses the function 58 * xlat_arch_tlbi_va(). 59 */ 60 void xlat_arch_tlbi_va_sync(void); 61 62 /* Print VA, PA, size and attributes of all regions in the mmap array. */ 63 void print_mmap(mmap_region_t *const mmap); 64 65 /* 66 * Print the current state of the translation tables by reading them from 67 * memory. 68 */ 69 void xlat_tables_print(xlat_ctx_t *ctx); 70 71 /* 72 * Architecture-specific initialization code. 73 */ 74 75 /* Returns the current Exception Level. The returned EL must be 1 or higher. */ 76 int xlat_arch_current_el(void); 77 78 /* 79 * Return the maximum physical address supported by the hardware. 80 * This value depends on the execution state (AArch32/AArch64). 81 */ 82 unsigned long long xlat_arch_get_max_supported_pa(void); 83 84 /* Enable MMU and configure it to use the specified translation tables. */ 85 void enable_mmu_arch(unsigned int flags, uint64_t *base_table, 86 unsigned long long pa, uintptr_t max_va); 87 88 /* 89 * Return 1 if the MMU of the translation regime managed by the given xlat_ctx_t 90 * is enabled, 0 otherwise. 91 */ 92 int is_mmu_enabled_ctx(const xlat_ctx_t *ctx); 93 94 #endif /* __XLAT_TABLES_PRIVATE_H__ */ 95
