1 /* 2 * Copyright (c) 2017-2018, 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 * Private shifts and masks to access fields of an mmap attribute 16 */ 17 /* Dynamic or static */ 18 #define MT_DYN_SHIFT U(31) 19 20 /* 21 * Memory mapping private attributes 22 * 23 * Private attributes not exposed in the public header. 24 */ 25 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 #define MT_STATIC (U(0) << MT_DYN_SHIFT) 34 #define MT_DYNAMIC (U(1) << MT_DYN_SHIFT) 35 36 #endif /* PLAT_XLAT_TABLES_DYNAMIC */ 37 38 /* 39 * Invalidate all TLB entries that match the given virtual address. This 40 * operation applies to all PEs in the same Inner Shareable domain as the PE 41 * that executes this function. This functions must be called for every 42 * translation table entry that is modified. 43 * 44 * xlat_arch_tlbi_va() applies the invalidation to the exception level of the 45 * current translation regime, whereas xlat_arch_tlbi_va_regime() applies it to 46 * the given translation regime. 47 * 48 * Note, however, that it is architecturally UNDEFINED to invalidate TLB entries 49 * pertaining to a higher exception level, e.g. invalidating EL3 entries from 50 * S-EL1. 51 */ 52 void xlat_arch_tlbi_va(uintptr_t va); 53 void xlat_arch_tlbi_va_regime(uintptr_t va, xlat_regime_t xlat_regime); 54 55 /* 56 * This function has to be called at the end of any code that uses the function 57 * xlat_arch_tlbi_va(). 58 */ 59 void xlat_arch_tlbi_va_sync(void); 60 61 /* Print VA, PA, size and attributes of all regions in the mmap array. */ 62 void print_mmap(mmap_region_t *const mmap); 63 64 /* 65 * Print the current state of the translation tables by reading them from 66 * memory. 67 */ 68 void xlat_tables_print(xlat_ctx_t *ctx); 69 70 /* 71 * Architecture-specific initialization code. 72 */ 73 74 /* Returns the current Exception Level. The returned EL must be 1 or higher. */ 75 int xlat_arch_current_el(void); 76 77 /* 78 * Return the maximum physical address supported by the hardware. 79 * This value depends on the execution state (AArch32/AArch64). 80 */ 81 unsigned long long xlat_arch_get_max_supported_pa(void); 82 83 /* Enable MMU and configure it to use the specified translation tables. */ 84 void enable_mmu_arch(unsigned int flags, uint64_t *base_table, 85 unsigned long long max_pa, uintptr_t max_va); 86 87 /* 88 * Return 1 if the MMU of the translation regime managed by the given xlat_ctx_t 89 * is enabled, 0 otherwise. 90 */ 91 int is_mmu_enabled_ctx(const xlat_ctx_t *ctx); 92 93 #endif /* __XLAT_TABLES_PRIVATE_H__ */ 94