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/*
* Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef __XLAT_TABLES_PRIVATE_H__
#define __XLAT_TABLES_PRIVATE_H__
#include <platform_def.h>
#include <xlat_tables_defs.h>
#if PLAT_XLAT_TABLES_DYNAMIC
/*
* Shifts and masks to access fields of an mmap_attr_t
*/
/* Dynamic or static */
#define MT_DYN_SHIFT 30 /* 31 would cause undefined behaviours */
/*
* Memory mapping private attributes
*
* Private attributes not exposed in the mmap_attr_t enum.
*/
typedef enum {
/*
* Regions mapped before the MMU can't be unmapped dynamically (they are
* static) and regions mapped with MMU enabled can be unmapped. This
* behaviour can't be overridden.
*
* Static regions can overlap each other, dynamic regions can't.
*/
MT_STATIC = 0 << MT_DYN_SHIFT,
MT_DYNAMIC = 1 << MT_DYN_SHIFT
} mmap_priv_attr_t;
/*
* Function used to invalidate all levels of the translation walk for a given
* virtual address. It must be called for every translation table entry that is
* modified.
*/
void xlat_arch_tlbi_va(uintptr_t va);
/*
* This function has to be called at the end of any code that uses the function
* xlat_arch_tlbi_va().
*/
void xlat_arch_tlbi_va_sync(void);
#endif /* PLAT_XLAT_TABLES_DYNAMIC */
/* Print VA, PA, size and attributes of all regions in the mmap array. */
void print_mmap(mmap_region_t *const mmap);
/*
* Print the current state of the translation tables by reading them from
* memory.
*/
void xlat_tables_print(xlat_ctx_t *ctx);
/*
* Architecture-specific initialization code.
*/
/* Returns the current Exception Level. The returned EL must be 1 or higher. */
int xlat_arch_current_el(void);
/*
* Returns the bit mask that has to be ORed to the rest of a translation table
* descriptor so that execution of code is prohibited at the given Exception
* Level.
*/
uint64_t xlat_arch_get_xn_desc(int el);
/*
* Return the maximum physical address supported by the hardware.
* This value depends on the execution state (AArch32/AArch64).
*/
unsigned long long xlat_arch_get_max_supported_pa(void);
/* Enable MMU and configure it to use the specified translation tables. */
void enable_mmu_arch(unsigned int flags, uint64_t *base_table,
unsigned long long pa, uintptr_t max_va);
/* Return 1 if the MMU of this Exception Level is enabled, 0 otherwise. */
int is_mmu_enabled(void);
#endif /* __XLAT_TABLES_PRIVATE_H__ */