50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
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/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2019-03-25 quanzhao the first version
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*/
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#ifndef __MMU_H_
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#define __MMU_H_
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#include <rtthread.h>
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#define DESC_SEC (0x2)
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#define MEMWBWA ((1<<12)|(3<<2)) /* write back, write allocate */
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#define MEMWB (3<<2) /* write back, no write allocate */
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#define MEMWT (2<<2) /* write through, no write allocate */
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#define SHAREDEVICE (1<<2) /* shared device */
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#define STRONGORDER (0<<2) /* strong ordered */
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#define XN (1<<4) /* eXecute Never */
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#define AP_RW (3<<10) /* supervisor=RW, user=RW */
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#define AP_RO (2<<10) /* supervisor=RW, user=RO */
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#define SHARED (1<<16) /* shareable */
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#define DOMAIN_FAULT (0x0)
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#define DOMAIN_CHK (0x1)
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#define DOMAIN_NOTCHK (0x3)
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#define DOMAIN0 (0x0<<5)
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#define DOMAIN1 (0x1<<5)
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#define DOMAIN0_ATTR (DOMAIN_CHK<<0)
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#define DOMAIN1_ATTR (DOMAIN_FAULT<<2)
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/* device mapping type */
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#define DEVICE_MEM (SHARED|AP_RW|DOMAIN0|SHAREDEVICE|DESC_SEC|XN)
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/* normal memory mapping type */
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#define NORMAL_MEM (SHARED|AP_RW|DOMAIN0|MEMWBWA|DESC_SEC)
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struct mem_desc
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{
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rt_uint32_t vaddr_start;
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rt_uint32_t vaddr_end;
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rt_uint32_t paddr_start;
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rt_uint32_t attr;
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};
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#endif
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