rt-thread/libcpu/aarch64/cortex-a53/mmu.h

/*
 * Copyright (c) 2006-2018, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2020-01-15     bigmagic     the first version
 */
#ifndef MMU_H__
#define MMU_H__
#include <rtthread.h>
#include <rthw.h>
#include <board.h>
#include "cp15.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 XN             (1<<4)  // eXecute Never
#define SHARED         (1<<16) /* shareable */
#define SHAREDEVICE    (1<<2)  /* shared device */
#define STRONGORDER    (0<<2)  /* strong ordered */
#define MEMWBWA        ((1<<12)|(3<<2))     /* write back, write allocate */

#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)

/* Read/Write, cache, write back */
#define RW_CB          (AP_RW|DOMAIN0|CB|DESC_SEC)
/* Read/Write, cache, write through */
#define RW_CNB         (AP_RW|DOMAIN0|CNB|DESC_SEC)
/* Read/Write without cache and write buffer */
#define RW_NCNB        (AP_RW|DOMAIN0|NCNB|DESC_SEC)
/* Read/Write without cache and write buffer, no execute */
#define RW_NCNBXN      (AP_RW|DOMAIN0|NCNB|DESC_SEC|XN)
/* Read/Write without cache and write buffer */
#define RW_FAULT       (AP_RW|DOMAIN1|NCNB|DESC_SEC)

/* device mapping type */
#define DEVICE_MEM     (SHARED|SHAREDEVICE|RW_NCNBXN)
/* normal memory mapping type */
#define NORMAL_MEM     (SHARED|AP_RW|DOMAIN0|MEMWBWA|DESC_SEC)
#define STRONG_ORDER_MEM (SHARED|AP_RO|XN|DESC_SEC)
#define BUS_ADDRESS(phys)	(((phys) & ~0xC0000000) | 0xC0000000)

void rt_hw_change_mmu_table(rt_uint32_t vaddrStart,
                      rt_uint32_t size,
                      rt_uint32_t paddrStart, rt_uint32_t attr);
#endif