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