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/*
* Copyright (c) 2014-2017, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef __XLAT_TABLES_H__
#define __XLAT_TABLES_H__
#include <xlat_tables_defs.h>
#ifndef __ASSEMBLY__
#include <stddef.h>
#include <stdint.h>
#include <xlat_mmu_helpers.h>
/* Helper macro to define entries for mmap_region_t. It creates
* identity mappings for each region.
*/
#define MAP_REGION_FLAT(adr, sz, attr) MAP_REGION(adr, adr, sz, attr)
/* Helper macro to define entries for mmap_region_t. It allows to
* re-map address mappings from 'pa' to 'va' for each region.
*/
#define MAP_REGION(pa, va, sz, attr) {(pa), (va), (sz), (attr)}
/*
* Shifts and masks to access fields of an mmap attribute
*/
#define MT_TYPE_MASK U(0x7)
#define MT_TYPE(_attr) ((_attr) & MT_TYPE_MASK)
/* Access permissions (RO/RW) */
#define MT_PERM_SHIFT U(3)
/* Security state (SECURE/NS) */
#define MT_SEC_SHIFT U(4)
/* Access permissions for instruction execution (EXECUTE/EXECUTE_NEVER) */
#define MT_EXECUTE_SHIFT U(5)
/*
* Memory mapping attributes
*/
/*
* Memory types supported.
* These are organised so that, going down the list, the memory types are
* getting weaker; conversely going up the list the memory types are getting
* stronger.
*/
#define MT_DEVICE U(0)
#define MT_NON_CACHEABLE U(1)
#define MT_MEMORY U(2)
/* Values up to 7 are reserved to add new memory types in the future */
#define MT_RO (U(0) << MT_PERM_SHIFT)
#define MT_RW (U(1) << MT_PERM_SHIFT)
#define MT_SECURE (U(0) << MT_SEC_SHIFT)
#define MT_NS (U(1) << MT_SEC_SHIFT)
/*
* Access permissions for instruction execution are only relevant for normal
* read-only memory, i.e. MT_MEMORY | MT_RO. They are ignored (and potentially
* overridden) otherwise:
* - Device memory is always marked as execute-never.
* - Read-write normal memory is always marked as execute-never.
*/
#define MT_EXECUTE (U(0) << MT_EXECUTE_SHIFT)
#define MT_EXECUTE_NEVER (U(1) << MT_EXECUTE_SHIFT)
/* Compound attributes for most common usages */
#define MT_CODE (MT_MEMORY | MT_RO | MT_EXECUTE)
#define MT_RO_DATA (MT_MEMORY | MT_RO | MT_EXECUTE_NEVER)
#if !ERROR_DEPRECATED
typedef unsigned int mmap_attr_t;
#endif
/*
* Structure for specifying a single region of memory.
*/
typedef struct mmap_region {
unsigned long long base_pa;
uintptr_t base_va;
size_t size;
unsigned int attr;
} mmap_region_t;
/* Generic translation table APIs */
void init_xlat_tables(void);
void mmap_add_region(unsigned long long base_pa, uintptr_t base_va,
size_t size, unsigned int attr);
void mmap_add(const mmap_region_t *mm);
#endif /*__ASSEMBLY__*/
#endif /* __XLAT_TABLES_H__ */