text: /*----------------------------------------------------------------------------
   * Copyright (c) <2018>, <Huawei Technologies Co., Ltd>
   * All rights reserved.
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted provided that the following conditions are met:
   * 1. Redistributions of source code must retain the above copyright notice, this list of
   * conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright notice, this list
   * of conditions and the following disclaimer in the documentation and/or other materials
   * provided with the distribution.
   * 3. Neither the name of the copyright holder nor the names of its contributors may be used
   * to endorse or promote products derived from this software without specific prior written
   * permission.
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *---------------------------------------------------------------------------*/
  /*----------------------------------------------------------------------------
   * Notice of Export Control Law
   * ===============================================
   * Huawei LiteOS may be subject to applicable export control laws and regulations, which might
   * include those applicable to Huawei LiteOS of U.S. and the country in which you are located.
   * Import, export and usage of Huawei LiteOS in any manner by you shall be in compliance with such
   * applicable export control laws and regulations.
   *---------------------------------------------------------------------------*/
  
  #ifndef _LOS_MPU_H
  #define _LOS_MPU_H
  
  #if LOSCFG_ENABLE_MPU == YES
  
  #include <los_compiler.h>
  #include <los_typedef.h>
  
  #define MPU_TYPE_NR_DREG_SHIFT  (8u)
  #define MPU_TYPE_NR_DREG_MASK   (0xffu << MPU_TYPE_NR_DREG_SHIFT)
  
  #define MPU_CTRL_PRIVDEFENA     (1u << 2)
  #define MPU_CTRL_HFNMIENA       (1u << 1)
  #define MPU_CTRL_ENABLE         (1u << 0)
  
  #define MPU_RBAR_REGION(n)      ((n) & 0xf)
  #define MPU_RBAR_VALID          (1u << 4)
  
  #define MPU_ATTR_XN             (1u << 28)
  
  /*      attr macro defination                 privileged unprivileged */
  
  #define MPU_ATTR______          (0u << 24) /* none       none         */
  #define MPU_ATTR_RW___          (1u << 24) /* RW         none         */
  #define MPU_ATTR_RW_R_          (2u << 24) /* RW         R            */
  #define MPU_ATTR_RW_RW          (3u << 24) /* RW         RW           */
  #define MPU_ATTR_R____          (5u << 24) /* R          none         */
  #define MPU_ATTR_R__R_          (6u << 24) /* R          R            */
  
  #define MPU_ATTR_STRONGLY       (4u << 16) /* strongly always s, so set S */
  #define MPU_ATTR_DEVICE         (5u << 16) /* device always s, so set S */
  #define MPU_ATTR_WT             (2u << 16)
  #define MPU_ATTR_WB             (3u << 16)
  
  #define MPU_ATTR_SZ(s)          ((32 - CLZ (s - 1) - 1) << 1)
  
  #define MPU_ATTR_EN             (1u << 00)
  
  #define MPU_NR_USR_ENTRIES      5
  #define MPU_FIRST_USR_REGION    2
  
  #define LOS_DO_PRIVILEDGED(expr0, expr1...)                     \
      do                                                          \
      {                                                           \
          UINT32 __control_flags = osEnterPrivileged();           \
          expr0 ## expr1;                                         \
          osExitPrivileged(__control_flags);                      \
      } while (0)
  
  typedef struct
  {
      UINT32 uwRegionAddr;
      UINT32 uwRegionAttr;
  } LOS_MPU_ENTRY;
  
  typedef struct
  {
      UINT32 uwRegionAddr;
      UINT32 uwRegionSize;
      UINT32 uwRegionAttr;
  } LOS_MPU_PARA;
  
  extern UINT32 osEnterPrivileged (void);
  extern void   osExitPrivileged  (UINT32);
  #else
  #define LOS_DO_PRIVILEDGED(expr0, expr1...)                     \
      do                                                          \
      {                                                           \
          expr0 ## expr1;                                         \
      } while (0)
  #endif
  
  #endif
  
  