60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
/*
|
|
* Copyright (c) 2019 Synopsys.
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include <device.h>
|
|
#include <init.h>
|
|
#include <kernel.h>
|
|
#include <soc.h>
|
|
#include <arch/arc/v2/aux_regs.h>
|
|
#include <arch/arc/v2/mpu/arc_mpu.h>
|
|
#include <arch/arc/v2/mpu/arc_core_mpu.h>
|
|
#include <linker/linker-defs.h>
|
|
|
|
#define LOG_LEVEL CONFIG_MPU_LOG_LEVEL
|
|
#include <logging/log.h>
|
|
LOG_MODULE_REGISTER(mpu);
|
|
|
|
/**
|
|
* @brief Get the number of supported MPU regions
|
|
*
|
|
*/
|
|
static inline uint8_t get_num_regions(void)
|
|
{
|
|
uint32_t num = z_arc_v2_aux_reg_read(_ARC_V2_MPU_BUILD);
|
|
|
|
num = (num & 0xFF00U) >> 8U;
|
|
|
|
return (uint8_t)num;
|
|
}
|
|
|
|
/**
|
|
* This internal function is utilized by the MPU driver to parse the intent
|
|
* type (i.e. THREAD_STACK_REGION) and return the correct parameter set.
|
|
*/
|
|
static inline uint32_t get_region_attr_by_type(uint32_t type)
|
|
{
|
|
switch (type) {
|
|
case THREAD_STACK_USER_REGION:
|
|
return REGION_RAM_ATTR;
|
|
case THREAD_STACK_REGION:
|
|
return AUX_MPU_ATTR_KW | AUX_MPU_ATTR_KR;
|
|
case THREAD_APP_DATA_REGION:
|
|
return REGION_RAM_ATTR;
|
|
case THREAD_STACK_GUARD_REGION:
|
|
/* no Write and Execute to guard region */
|
|
return AUX_MPU_ATTR_UR | AUX_MPU_ATTR_KR;
|
|
default:
|
|
/* unknown type */
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
#if CONFIG_ARC_MPU_VER == 4
|
|
#include "arc_mpu_v4_internal.h"
|
|
#else
|
|
#include "arc_mpu_common_internal.h"
|
|
#endif
|