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https://github.com/ARM-software/arm-trusted-firmware.git
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030567e6f5
This patch uses the U() and ULL() macros for constants, to fix some of the signed-ness defects flagged by the MISRA scanner. Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
/*
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* Copyright (c) 2014-2017, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef __XLAT_TABLES_H__
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#define __XLAT_TABLES_H__
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#include <xlat_tables_defs.h>
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#ifndef __ASSEMBLY__
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#include <stddef.h>
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#include <stdint.h>
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#include <xlat_mmu_helpers.h>
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/* Helper macro to define entries for mmap_region_t. It creates
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* identity mappings for each region.
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*/
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#define MAP_REGION_FLAT(adr, sz, attr) MAP_REGION(adr, adr, sz, attr)
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/* Helper macro to define entries for mmap_region_t. It allows to
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* re-map address mappings from 'pa' to 'va' for each region.
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*/
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#define MAP_REGION(pa, va, sz, attr) {(pa), (va), (sz), (attr)}
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/*
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* Shifts and masks to access fields of an mmap_attr_t
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*/
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#define MT_TYPE_MASK U(0x7)
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#define MT_TYPE(_attr) ((_attr) & MT_TYPE_MASK)
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/* Access permissions (RO/RW) */
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#define MT_PERM_SHIFT U(3)
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/* Security state (SECURE/NS) */
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#define MT_SEC_SHIFT U(4)
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/* Access permissions for instruction execution (EXECUTE/EXECUTE_NEVER) */
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#define MT_EXECUTE_SHIFT U(5)
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/*
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* Memory mapping attributes
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*/
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typedef enum {
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/*
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* Memory types supported.
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* These are organised so that, going down the list, the memory types
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* are getting weaker; conversely going up the list the memory types are
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* getting stronger.
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*/
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MT_DEVICE,
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MT_NON_CACHEABLE,
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MT_MEMORY,
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/* Values up to 7 are reserved to add new memory types in the future */
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MT_RO = U(0) << MT_PERM_SHIFT,
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MT_RW = U(1) << MT_PERM_SHIFT,
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MT_SECURE = U(0) << MT_SEC_SHIFT,
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MT_NS = U(1) << MT_SEC_SHIFT,
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/*
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* Access permissions for instruction execution are only relevant for
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* normal read-only memory, i.e. MT_MEMORY | MT_RO. They are ignored
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* (and potentially overridden) otherwise:
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* - Device memory is always marked as execute-never.
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* - Read-write normal memory is always marked as execute-never.
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*/
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MT_EXECUTE = U(0) << MT_EXECUTE_SHIFT,
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MT_EXECUTE_NEVER = U(1) << MT_EXECUTE_SHIFT,
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} mmap_attr_t;
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#define MT_CODE (MT_MEMORY | MT_RO | MT_EXECUTE)
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#define MT_RO_DATA (MT_MEMORY | MT_RO | MT_EXECUTE_NEVER)
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/*
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* Structure for specifying a single region of memory.
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*/
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typedef struct mmap_region {
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unsigned long long base_pa;
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uintptr_t base_va;
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size_t size;
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mmap_attr_t attr;
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} mmap_region_t;
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/* Generic translation table APIs */
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void init_xlat_tables(void);
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void mmap_add_region(unsigned long long base_pa, uintptr_t base_va,
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size_t size, mmap_attr_t attr);
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void mmap_add(const mmap_region_t *mm);
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#endif /*__ASSEMBLY__*/
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#endif /* __XLAT_TABLES_H__ */
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