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- /*
- * File : mmu.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2017, RT-Thread Development Team
- *
- * This program 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 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Change Logs:
- * Date Author Notes
- * 2018-02-08 RT-Thread the first version
- */
- #ifndef __MMU_H__
- #define __MMU_H__
- #include <rtthread.h>
- #define CACHE_LINE_SIZE 32
- #define DESC_SEC (0x2|(1<<4))
- #define CB (3<<2) //cache_on, write_back
- #define CNB (2<<2) //cache_on, write_through
- #define NCB (1<<2) //cache_off,WR_BUF on
- #define NCNB (0<<2) //cache_off,WR_BUF off
- #define AP_RW (3<<10) //supervisor=RW, user=RW
- #define AP_RO (2<<10) //supervisor=RW, user=RO
- #define DOMAIN_FAULT (0x0)
- #define DOMAIN_CHK (0x1)
- #define DOMAIN_NOTCHK (0x3)
- #define DOMAIN0 (0x0<<5)
- #define DOMAIN1 (0x1<<5)
- #define DOMAIN0_ATTR (DOMAIN_CHK<<0)
- #define DOMAIN1_ATTR (DOMAIN_FAULT<<2)
- #define RW_CB (AP_RW|DOMAIN0|CB|DESC_SEC) /* Read/Write, cache, write back */
- #define RW_CNB (AP_RW|DOMAIN0|CNB|DESC_SEC) /* Read/Write, cache, write through */
- #define RW_NCNB (AP_RW|DOMAIN0|NCNB|DESC_SEC) /* Read/Write without cache and write buffer */
- #define RW_FAULT (AP_RW|DOMAIN1|NCNB|DESC_SEC) /* Read/Write without cache and write buffer */
- struct mem_desc
- {
- rt_uint32_t vaddr_start;
- rt_uint32_t vaddr_end;
- rt_uint32_t paddr_start;
- rt_uint32_t attr;
- };
- void rt_hw_mmu_init(struct mem_desc *mdesc, rt_uint32_t size);
- void mmu_clean_invalidated_dcache(rt_uint32_t buffer, rt_uint32_t size);
- void mmu_clean_dcache(rt_uint32_t buffer, rt_uint32_t size);
- void mmu_invalidate_dcache(rt_uint32_t buffer, rt_uint32_t size);
- #endif
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