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- /*
- ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio.
- This file is part of ChibiOS.
- ChibiOS is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- ChibiOS is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
- /**
- * @file mmu.h
- * @brief MMU macros and structures.
- *
- * @addtogroup MMU
- * @{
- */
- #ifndef MMU_H
- #define MMU_H
- /*===========================================================================*/
- /* Module constants. */
- /*===========================================================================*/
- #define DCISW_INVALIDATE 0
- #define DCISW_CLEAN 1
- #define DCISW_CLEAN_AND_INV 2
- /*===========================================================================*/
- /* Module pre-compile time settings. */
- /*===========================================================================*/
- /*===========================================================================*/
- /* Derived constants and error checks. */
- /*===========================================================================*/
- /*===========================================================================*/
- /* Module data structures and types. */
- /*===========================================================================*/
- /*===========================================================================*/
- /* Module macros. */
- /*===========================================================================*/
- /*
- * Translation Table Entry descriptor macros
- *
- * Type Section layout:
- * +---------+--+-+--+-+-----+--------+-------+-+------+--+-+-+-+---+
- * |3 2|1 |1|1 |1|1 |1 1|1 1| | | | | | | |
- * |1 0|9 |8|7 |6|5 |4 2|1 0|9|8 5|4 |3|2|1|0 |
- * +---------+--+-+--+-+-----+--------+-------+-+------+--+-+-+-+---+
- * | section |NS|0|nG|S|AP[2]|TEX[2:0]|AP[1:0]| |domain|XN|C|B|1|PXN|
- * +---------+--+-+--+-+-----+--------+-------+-+------+--+-+-+-+---+
- *
- */
- #define TTE_TYPE_SECT (0x01 << 1)
- #define TTE_SECT_B (0x01 << 2)
- #define TTE_SECT_C (0x01 << 3)
- #define TTE_SECT_XN (0x01 << 4)
- #define TTE_SECT_DOM(x) ((x) << 5)
- #define TTE_SECT_AP0 (0x01 << 10)
- #define TTE_SECT_AP1 (0x01 << 11)
- #define TTE_SECT_TEX(x) ((x) << 12)
- #define TTE_SECT_AP2 (0x01 << 15)
- #define TTE_SECT_S (0x01 << 16)
- #define TTE_SECT_NG (0x01 << 17)
- #define TTE_SECT_NS (0x01 << 19)
- #define TTE_SECT_MEM_CACHEABLE (TTE_SECT_TEX(0b111)|TTE_SECT_B|TTE_SECT_C)
- #define TTE_SECT_MEM_NO_CACHEABLE (TTE_SECT_TEX(0b100))
- #define TTE_SECT_MEM_STRONGLY_ORD (TTE_SECT_TEX(0b000))
- #define TTE_SECT_DEVICE (TTE_SECT_B)
- #define TTE_SECT_EXE_NEVER (TTE_SECT_XN)
- #define TTE_SECT_RW_ACCESS (TTE_SECT_AP1|TTE_SECT_AP0)
- #define TTE_SECT_RO_ACCESS (TTE_SECT_AP1)
- #define TTE_SECT_UNDEF (0)
- #define TTE_SECT_SECTION(addr) ((addr) & 0xFFF00000)
- /*===========================================================================*/
- /* External declarations. */
- /*===========================================================================*/
- #ifdef __cplusplus
- extern "C" {
- #endif
- void __mmu_init(void);
- #ifdef __cplusplus
- }
- #endif
- /*===========================================================================*/
- /* Module inline functions. */
- /*===========================================================================*/
- #endif /* MMU_H */
- /** @} */
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