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Diffstat (limited to 'drivers/include/fsl_mpu.h')
| -rw-r--r-- | drivers/include/fsl_mpu.h | 422 |
1 files changed, 422 insertions, 0 deletions
diff --git a/drivers/include/fsl_mpu.h b/drivers/include/fsl_mpu.h new file mode 100644 index 0000000..d39d78a --- /dev/null +++ b/drivers/include/fsl_mpu.h @@ -0,0 +1,422 @@ +/* + * Copyright (c) 2015, Freescale Semiconductor, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * o Redistributions of source code must retain the above copyright notice, this list + * of conditions and the following disclaimer. + * + * o 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. + * + * o Neither the name of Freescale Semiconductor, Inc. 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. + */ +#ifndef _FSL_MPU_H_ +#define _FSL_MPU_H_ + +#include "fsl_common.h" + +/*! + * @addtogroup mpu + * @{ + */ + + +/******************************************************************************* + * Definitions + ******************************************************************************/ + +/*! @name Driver version */ +/*@{*/ +/*! @brief MPU driver version 2.1.0. */ +#define FSL_MPU_DRIVER_VERSION (MAKE_VERSION(2, 1, 0)) +/*@}*/ + +/*! @brief MPU the bit shift for masters with privilege rights: read write and execute. */ +#define MPU_REGION_RWXRIGHTS_MASTER_SHIFT(n) (n * 6) + +/*! @brief MPU masters with read, write and execute rights bit mask. */ +#define MPU_REGION_RWXRIGHTS_MASTER_MASK(n) (0x1Fu << MPU_REGION_RWXRIGHTS_MASTER_SHIFT(n)) + +/*! @brief MPU masters with read, write and execute rights bit width. */ +#define MPU_REGION_RWXRIGHTS_MASTER_WIDTH 5 + +/*! @brief MPU masters with read, write and execute rights priority setting. */ +#define MPU_REGION_RWXRIGHTS_MASTER(n, x) \ + (((uint32_t)(((uint32_t)(x)) << MPU_REGION_RWXRIGHTS_MASTER_SHIFT(n))) & MPU_REGION_RWXRIGHTS_MASTER_MASK(n)) + +/*! @brief MPU masters with read, write and execute rights process enable bit shift. */ +#define MPU_REGION_RWXRIGHTS_MASTER_PE_SHIFT(n) (n * 6 + MPU_REGION_RWXRIGHTS_MASTER_WIDTH) + +/*! @brief MPU masters with read, write and execute rights process enable bit mask. */ +#define MPU_REGION_RWXRIGHTS_MASTER_PE_MASK(n) (0x1u << MPU_REGION_RWXRIGHTS_MASTER_PE_SHIFT(n)) + +/*! @brief MPU masters with read, write and execute rights process enable setting. */ +#define MPU_REGION_RWXRIGHTS_MASTER_PE(n, x) \ + (((uint32_t)(((uint32_t)(x)) << MPU_REGION_RWXRIGHTS_MASTER_PE_SHIFT(n))) & MPU_REGION_RWXRIGHTS_MASTER_PE_MASK(n)) + +/*! @brief MPU masters with normal read write permission bit shift. */ +#define MPU_REGION_RWRIGHTS_MASTER_SHIFT(n) ((n - FSL_FEATURE_MPU_PRIVILEGED_RIGHTS_MASTER_COUNT) * 2 + 24) + +/*! @brief MPU masters with normal read write rights bit mask. */ +#define MPU_REGION_RWRIGHTS_MASTER_MASK(n) (0x3u << MPU_REGION_RWRIGHTS_MASTER_SHIFT(n)) + +/*! @brief MPU masters with normal read write rights priority setting. */ +#define MPU_REGION_RWRIGHTS_MASTER(n, x) \ + (((uint32_t)(((uint32_t)(x)) << MPU_REGION_RWRIGHTS_MASTER_SHIFT(n))) & MPU_REGION_RWRIGHTS_MASTER_MASK(n)) + +/*! @brief Describes the number of MPU regions. */ +typedef enum _mpu_region_total_num +{ + kMPU_8Regions = 0x0U, /*!< MPU supports 8 regions. */ + kMPU_12Regions = 0x1U, /*!< MPU supports 12 regions. */ + kMPU_16Regions = 0x2U /*!< MPU supports 16 regions. */ +} mpu_region_total_num_t; + +/*! @brief MPU slave port number. */ +typedef enum _mpu_slave +{ + kMPU_Slave0 = 4U, /*!< MPU slave port 0. */ + kMPU_Slave1 = 3U, /*!< MPU slave port 1. */ + kMPU_Slave2 = 2U, /*!< MPU slave port 2. */ + kMPU_Slave3 = 1U, /*!< MPU slave port 3. */ + kMPU_Slave4 = 0U /*!< MPU slave port 4. */ +} mpu_slave_t; + +/*! @brief MPU error access control detail. */ +typedef enum _mpu_err_access_control +{ + kMPU_NoRegionHit = 0U, /*!< No region hit error. */ + kMPU_NoneOverlappRegion = 1U, /*!< Access single region error. */ + kMPU_OverlappRegion = 2U /*!< Access overlapping region error. */ +} mpu_err_access_control_t; + +/*! @brief MPU error access type. */ +typedef enum _mpu_err_access_type +{ + kMPU_ErrTypeRead = 0U, /*!< MPU error access type --- read. */ + kMPU_ErrTypeWrite = 1U /*!< MPU error access type --- write. */ +} mpu_err_access_type_t; + +/*! @brief MPU access error attributes.*/ +typedef enum _mpu_err_attributes +{ + kMPU_InstructionAccessInUserMode = 0U, /*!< Access instruction error in user mode. */ + kMPU_DataAccessInUserMode = 1U, /*!< Access data error in user mode. */ + kMPU_InstructionAccessInSupervisorMode = 2U, /*!< Access instruction error in supervisor mode. */ + kMPU_DataAccessInSupervisorMode = 3U /*!< Access data error in supervisor mode. */ +} mpu_err_attributes_t; + +/*! @brief MPU access rights in supervisor mode for bus master 0 ~ 3. */ +typedef enum _mpu_supervisor_access_rights +{ + kMPU_SupervisorReadWriteExecute = 0U, /*!< Read write and execute operations are allowed in supervisor mode. */ + kMPU_SupervisorReadExecute = 1U, /*!< Read and execute operations are allowed in supervisor mode. */ + kMPU_SupervisorReadWrite = 2U, /*!< Read write operations are allowed in supervisor mode. */ + kMPU_SupervisorEqualToUsermode = 3U /*!< Access permission equal to user mode. */ +} mpu_supervisor_access_rights_t; + +/*! @brief MPU access rights in user mode for bus master 0 ~ 3. */ +typedef enum _mpu_user_access_rights +{ + kMPU_UserNoAccessRights = 0U, /*!< No access allowed in user mode. */ + kMPU_UserExecute = 1U, /*!< Execute operation is allowed in user mode. */ + kMPU_UserWrite = 2U, /*!< Write operation is allowed in user mode. */ + kMPU_UserWriteExecute = 3U, /*!< Write and execute operations are allowed in user mode. */ + kMPU_UserRead = 4U, /*!< Read is allowed in user mode. */ + kMPU_UserReadExecute = 5U, /*!< Read and execute operations are allowed in user mode. */ + kMPU_UserReadWrite = 6U, /*!< Read and write operations are allowed in user mode. */ + kMPU_UserReadWriteExecute = 7U /*!< Read write and execute operations are allowed in user mode. */ +} mpu_user_access_rights_t; + +/*! @brief MPU hardware basic information. */ +typedef struct _mpu_hardware_info +{ + uint8_t hardwareRevisionLevel; /*!< Specifies the MPU's hardware and definition reversion level. */ + uint8_t slavePortsNumbers; /*!< Specifies the number of slave ports connected to MPU. */ + mpu_region_total_num_t regionsNumbers; /*!< Indicates the number of region descriptors implemented. */ +} mpu_hardware_info_t; + +/*! @brief MPU detail error access information. */ +typedef struct _mpu_access_err_info +{ + uint32_t master; /*!< Access error master. */ + mpu_err_attributes_t attributes; /*!< Access error attributes. */ + mpu_err_access_type_t accessType; /*!< Access error type. */ + mpu_err_access_control_t accessControl; /*!< Access error control. */ + uint32_t address; /*!< Access error address. */ +#if FSL_FEATURE_MPU_HAS_PROCESS_IDENTIFIER + uint8_t processorIdentification; /*!< Access error processor identification. */ +#endif /* FSL_FEATURE_MPU_HAS_PROCESS_IDENTIFIER */ +} mpu_access_err_info_t; + +/*! @brief MPU read/write/execute rights control for bus master 0 ~ 3. */ +typedef struct _mpu_rwxrights_master_access_control +{ + mpu_supervisor_access_rights_t superAccessRights; /*!< Master access rights in supervisor mode. */ + mpu_user_access_rights_t userAccessRights; /*!< Master access rights in user mode. */ +#if FSL_FEATURE_MPU_HAS_PROCESS_IDENTIFIER + bool processIdentifierEnable; /*!< Enables or disables process identifier. */ +#endif /* FSL_FEATURE_MPU_HAS_PROCESS_IDENTIFIER */ +} mpu_rwxrights_master_access_control_t; + +/*! @brief MPU read/write access control for bus master 4 ~ 7. */ +typedef struct _mpu_rwrights_master_access_control +{ + bool writeEnable; /*!< Enables or disables write permission. */ + bool readEnable; /*!< Enables or disables read permission. */ +} mpu_rwrights_master_access_control_t; + +/*! + * @brief MPU region configuration structure. + * + * This structure is used to configure the regionNum region. + * The accessRights1[0] ~ accessRights1[3] are used to configure the bus master + * 0 ~ 3 with the privilege rights setting. The accessRights2[0] ~ accessRights2[3] + * are used to configure the high master 4 ~ 7 with the normal read write permission. + * The master port assignment is the chip configuration. Normally, the core is the + * master 0, debugger is the master 1. + * Note: MPU assigns a priority scheme where the debugger is treated as the highest + * priority master followed by the core and then all the remaining masters. + * MPU protection does not allow writes from the core to affect the "regionNum 0" start + * and end address nor the permissions associated with the debugger. It can only write + * the permission fields associated with the other masters. This protection guarantee + * the debugger always has access to the entire address space and those rights can't + * be changed by the core or any other bus master. Prepare + * the region configuration when regionNum is 0. + */ +typedef struct _mpu_region_config +{ + uint32_t regionNum; /*!< MPU region number, range form 0 ~ FSL_FEATURE_MPU_DESCRIPTOR_COUNT - 1. */ + uint32_t startAddress; /*!< Memory region start address. Note: bit0 ~ bit4 always be marked as 0 by MPU. The actual + start address is 0-modulo-32 byte address. */ + uint32_t endAddress; /*!< Memory region end address. Note: bit0 ~ bit4 always be marked as 1 by MPU. The actual end + address is 31-modulo-32 byte address. */ + mpu_rwxrights_master_access_control_t accessRights1[4]; /*!< Masters with read, write and execute rights setting. */ + mpu_rwrights_master_access_control_t accessRights2[4]; /*!< Masters with normal read write rights setting. */ +#if FSL_FEATURE_MPU_HAS_PROCESS_IDENTIFIER + uint8_t processIdentifier; /*!< Process identifier used when "processIdentifierEnable" set with true. */ + uint8_t + processIdMask; /*!< Process identifier mask. The setting bit will ignore the same bit in process identifier. */ +#endif /* FSL_FEATURE_MPU_HAS_PROCESS_IDENTIFIER */ +} mpu_region_config_t; + +/*! + * @brief The configuration structure for the MPU initialization. + * + * This structure is used when calling the MPU_Init function. + */ +typedef struct _mpu_config +{ + mpu_region_config_t regionConfig; /*!< region access permission. */ + struct _mpu_config *next; /*!< pointer to the next structure. */ +} mpu_config_t; + +/******************************************************************************* + * API + ******************************************************************************/ + +#if defined(__cplusplus) +extern "C" { +#endif /* _cplusplus */ + +/*! + * @name Initialization and deinitialization + * @{ + */ + +/*! + * @brief Initializes the MPU with the user configuration structure. + * + * This function configures the MPU module with the user-defined configuration. + * + * @param base MPU peripheral base address. + * @param config The pointer to the configuration structure. + */ +void MPU_Init(MPU_Type *base, const mpu_config_t *config); + +/*! + * @brief Deinitializes the MPU regions. + * + * @param base MPU peripheral base address. + */ +void MPU_Deinit(MPU_Type *base); + +/* @}*/ + +/*! + * @name Basic Control Operations + * @{ + */ + +/*! + * @brief Enables/disables the MPU globally. + * + * Call this API to enable or disable the MPU module. + * + * @param base MPU peripheral base address. + * @param enable True enable MPU, false disable MPU. + */ +static inline void MPU_Enable(MPU_Type *base, bool enable) +{ + if (enable) + { + /* Enable the MPU globally. */ + base->CESR |= MPU_CESR_VLD_MASK; + } + else + { /* Disable the MPU globally. */ + base->CESR &= ~MPU_CESR_VLD_MASK; + } +} + +/*! + * @brief Enables/disables the MPU for a special region. + * + * When MPU is enabled, call this API to disable an unused region + * of an enabled MPU. Call this API to minimize the power dissipation. + * + * @param base MPU peripheral base address. + * @param number MPU region number. + * @param enable True enable the special region MPU, false disable the special region MPU. + */ +static inline void MPU_RegionEnable(MPU_Type *base, uint32_t number, bool enable) +{ + if (enable) + { + /* Enable the #number region MPU. */ + base->WORD[number][3] |= MPU_WORD_VLD_MASK; + } + else + { /* Disable the #number region MPU. */ + base->WORD[number][3] &= ~MPU_WORD_VLD_MASK; + } +} + +/*! + * @brief Gets the MPU basic hardware information. + * + * @param base MPU peripheral base address. + * @param hardwareInform The pointer to the MPU hardware information structure. See "mpu_hardware_info_t". + */ +void MPU_GetHardwareInfo(MPU_Type *base, mpu_hardware_info_t *hardwareInform); + +/*! + * @brief Sets the MPU region. + * + * Note: Due to the MPU protection, the Region number 0 does not allow writes from + * core to affect the start and end address nor the permissions associated with + * the debugger. It can only write the permission fields associated + * with the other masters. + * + * @param base MPU peripheral base address. + * @param regionConfig The pointer to the MPU user configuration structure. See "mpu_region_config_t". + */ +void MPU_SetRegionConfig(MPU_Type *base, const mpu_region_config_t *regionConfig); + +/*! + * @brief Sets the region start and end address. + * + * Memory region start address. Note: bit0 ~ bit4 is always marked as 0 by MPU. + * The actual start address by MPU is 0-modulo-32 byte address. + * Memory region end address. Note: bit0 ~ bit4 always be marked as 1 by MPU. + * The actual end address used by MPU is 31-modulo-32 byte address. + * Note: Due to the MPU protection, the startAddr and endAddr can't be + * changed by the core when regionNum is 0. + * + * @param base MPU peripheral base address. + * @param regionNum MPU region number. The range is from 0 to + * FSL_FEATURE_MPU_DESCRIPTOR_COUNT - 1. + * @param startAddr Region start address. + * @param endAddr Region end address. + */ +void MPU_SetRegionAddr(MPU_Type *base, uint32_t regionNum, uint32_t startAddr, uint32_t endAddr); + +/*! + * @brief Sets the MPU region access rights for masters with read, write and execute rights. + * The MPU access rights depend on two board classifications of bus masters. + * The privilege rights masters and the normal rights masters. + * The privilege rights masters have the read, write and execute access rights. + * So except the normal read and write rights, the execute rights is also + * allowed for these masters. The privilege rights masters are normally range from + * bus masters 0 - 3. However, the maximum master number is device-specific. + * See the "FSL_FEATURE_MPU_PRIVILEGED_RIGHTS_MASTER_MAX_INDEX". + * The normal rights masters access rights control see + * "MPU_SetRegionRwMasterAccessRights()". + * + * @param base MPU peripheral base address. + * @param regionNum MPU region number. Should range from 0 to + * FSL_FEATURE_MPU_DESCRIPTOR_COUNT - 1. + * @param masterNum MPU bus master number. Should range from 0 to + * FSL_FEATURE_MPU_PRIVILEGED_RIGHTS_MASTER_MAX_INDEX. + * @param accessRights The pointer to the MPU access rights configuration. See "mpu_rwxrights_master_access_control_t". + */ +void MPU_SetRegionRwxMasterAccessRights(MPU_Type *base, + uint32_t regionNum, + uint32_t masterNum, + const mpu_rwxrights_master_access_control_t *accessRights); + +/*! + * @brief Sets the MPU region access rights for masters with read and write rights. + * The MPU access rights depend on two board classifications of bus masters. + * The privilege rights masters and the normal rights masters. + * The normal rights masters only have the read and write access permissions. + * The privilege rights access control see "MPU_SetRegionRwxMasterAccessRights". + * + * @param base MPU peripheral base address. + * @param regionNum MPU region number. The range is from 0 to + * FSL_FEATURE_MPU_DESCRIPTOR_COUNT - 1. + * @param masterNum MPU bus master number. Should range from FSL_FEATURE_MPU_PRIVILEGED_RIGHTS_MASTER_COUNT + * to ~ FSL_FEATURE_MPU_MASTER_MAX_INDEX. + * @param accessRights The pointer to the MPU access rights configuration. See "mpu_rwrights_master_access_control_t". + */ +void MPU_SetRegionRwMasterAccessRights(MPU_Type *base, + uint32_t regionNum, + uint32_t masterNum, + const mpu_rwrights_master_access_control_t *accessRights); + +/*! + * @brief Gets the numbers of slave ports where errors occur. + * + * @param base MPU peripheral base address. + * @param slaveNum MPU slave port number. + * @return The slave ports error status. + * true - error happens in this slave port. + * false - error didn't happen in this slave port. + */ +bool MPU_GetSlavePortErrorStatus(MPU_Type *base, mpu_slave_t slaveNum); + +/*! + * @brief Gets the MPU detailed error access information. + * + * @param base MPU peripheral base address. + * @param slaveNum MPU slave port number. + * @param errInform The pointer to the MPU access error information. See "mpu_access_err_info_t". + */ +void MPU_GetDetailErrorAccessInfo(MPU_Type *base, mpu_slave_t slaveNum, mpu_access_err_info_t *errInform); + +/* @} */ + +#if defined(__cplusplus) +} +#endif + +/*! @}*/ + +#endif /* _FSL_MPU_H_ */ |