rt-thread-official/libcpu/arm/am335x/mmu.h

/*
 * Copyright (c) 2006-2021, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2012-01-10     bernard      porting to AM1808
 */

#ifndef __MMU_H__
#define __MMU_H__

#include <rtthread.h>

#define DESC_SEC        (0x2)
#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 */

void rt_hw_mmu_init(void);

#endif