mpu.h File Reference

#include <stdint.h>
#include <zephyr/toolchain.h>
#include <zephyr/sys/util_macro.h>
#include <xtensa/config/core-isa.h>

Go to the source code of this file.

Data Structures
struct	xtensa_mpu_entry
	Foreground MPU Entry. More...
struct	xtensa_mpu_map
	Struct to hold foreground MPU map and its entries. More...
struct	xtensa_mpu_range
	Struct to describe a memory region [start, end). More...

Macros
#define	XTENSA_MPU_NUM_ENTRIES   XCHAL_MPU_ENTRIES
	Number of available entries in the MPU table.
MPU memory region access rights.
Note These are NOT bit masks, and must be used as whole value.
#define	XTENSA_MPU_ACCESS_P_NA_U_NA   (0)
	Kernel and user modes no access.
#define	XTENSA_MPU_ACCESS_P_X_U_NA   (2)
	Kernel mode execution only.
#define	XTENSA_MPU_ACCESS_P_NA_U_X   (3)
	User mode execution only.
#define	XTENSA_MPU_ACCESS_P_RO_U_NA   (4)
	Kernel mode read only.
#define	XTENSA_MPU_ACCESS_P_RX_U_NA   (5)
	Kernel mode read and execution.
#define	XTENSA_MPU_ACCESS_P_RW_U_NA   (6)
	Kernel mode read and write.
#define	XTENSA_MPU_ACCESS_P_RWX_U_NA   (7)
	Kernel mode read, write and execution.
#define	XTENSA_MPU_ACCESS_P_WO_U_WO   (8)
	Kernel and user modes write only.
#define	XTENSA_MPU_ACCESS_P_RW_U_RWX   (9)
	Kernel mode read, write.
#define	XTENSA_MPU_ACCESS_P_RW_U_RO   (10)
	Kernel mode read and write.
#define	XTENSA_MPU_ACCESS_P_RWX_U_RX   (11)
	Kernel mode read, write and execution.
#define	XTENSA_MPU_ACCESS_P_RO_U_RO   (12)
	Kernel and user modes read only.
#define	XTENSA_MPU_ACCESS_P_RX_U_RX   (13)
	Kernel and user modes read and execution.
#define	XTENSA_MPU_ACCESS_P_RW_U_RW   (14)
	Kernel and user modes read and write.
#define	XTENSA_MPU_ACCESS_P_RWX_U_RWX   (15)
	Kernel and user modes read, write and execution.

Functions
void	xtensa_mpu_init (void)
	Initialize hardware MPU.

Variables
const struct xtensa_mpu_range	xtensa_soc_mpu_ranges []
	Additional memory regions required by SoC.
const int	xtensa_soc_mpu_ranges_num
	Number of SoC additional memory regions.

Memory domain and partitions
#define	K_MEM_PARTITION_IS_EXECUTABLE(access_rights)    (xtensa_mem_partition_is_executable(access_rights))
#define	K_MEM_PARTITION_IS_WRITABLE(access_rights)    (xtensa_mem_partition_is_writable(access_rights))
#define	K_MEM_PARTITION_P_RW_U_RW    ((k_mem_partition_attr_t) {XTENSA_MPU_ACCESS_P_RW_U_RW})
#define	K_MEM_PARTITION_P_RW_U_NA    ((k_mem_partition_attr_t) {XTENSA_MPU_ACCESS_P_RW_U_NA})
#define	K_MEM_PARTITION_P_RO_U_RO    ((k_mem_partition_attr_t) {XTENSA_MPU_ACCESS_P_RO_U_RO})
#define	K_MEM_PARTITION_P_RO_U_NA    ((k_mem_partition_attr_t) {XTENSA_MPU_ACCESS_P_RO_U_NA})
#define	K_MEM_PARTITION_P_NA_U_NA    ((k_mem_partition_attr_t) {XTENSA_MPU_ACCESS_P_NA_U_NA})
#define	K_MEM_PARTITION_P_RX_U_RX    ((k_mem_partition_attr_t) {XTENSA_MPU_ACCESS_P_RX_U_RX})
typedef uint32_t	k_mem_partition_attr_t
static bool	xtensa_mem_partition_is_executable (k_mem_partition_attr_t access_rights)
static bool	xtensa_mem_partition_is_writable (k_mem_partition_attr_t access_rights)