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ARM: MPU: Arch specific memory domain APIs

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Added architecture specific support for memory domain destroy
and remove partition for arm and nxp. An optimized version of
remove partition was also added.

Signed-off-by: Adithya Baglody <adithya.nagaraj.baglody@intel.com>
This commit is contained in:
Adithya Baglody 2017-10-06 15:43:11 +05:30 • committed by Andrew Boie
commit 7add3cdd82
3 changed files with 68 additions and 0 deletions
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33
arch/arm/core/cortex_m/mpu/arm_core_mpu.c
View file

@ -52,4 +52,37 @@ int _arch_mem_domain_max_partitions_get(void)
{
return arm_core_mpu_get_max_domain_partition_regions();
}
/**
* @brief Reset MPU region for a single memory partition
*
* @param domain The memory domain structure
* @param part_index memory partition index
*/
void _arch_mem_domain_remove_partition(struct k_mem_domain *domain,
u32_t partition_id)
{
ARG_UNUSED(domain);
arm_core_mpu_disable();
arm_core_mpu_remove_mem_partition(partition_id);
arm_core_mpu_enable();
}
/**
* @brief Destroy MPU regions for the mem domain
*
* @param domain The memory domain structure
* @param part_index memory partition index
*/
void _arch_mem_domain_destroy(struct k_mem_domain *domain)
{
ARG_UNUSED(domain);
arm_core_mpu_disable();
arm_core_mpu_configure_mem_domain(NULL);
arm_core_mpu_enable();
}
#endif

17
arch/arm/core/cortex_m/mpu/arm_mpu.c
View file

@ -262,6 +262,23 @@ void arm_core_mpu_configure_mem_partition(u32_t part_index,
}
}
/**
* @brief Reset MPU region for a single memory partition
*
* @param part_index memory partition index
*/
void arm_core_mpu_remove_mem_partition(u32_t part_index)
{
u32_t region_index =
_get_region_index_by_type(THREAD_DOMAIN_PARTITION_REGION);
SYS_LOG_DBG("disable region 0x%x", region_index + part_index);
/* Disable region */
ARM_MPU_DEV->rnr = region_index + part_index;
ARM_MPU_DEV->rbar = 0;
ARM_MPU_DEV->rasr = 0;
}
/**
* @brief get the maximum number of free regions for memory domain partitions
*/

18
arch/arm/core/cortex_m/mpu/nxp_mpu.c
View file

@ -289,6 +289,24 @@ void arm_core_mpu_configure_mem_partition(u32_t part_index,
}
}
/**
* @brief Reset MPU region for a single memory partition
*
* @param part_index memory partition index
*/
void arm_core_mpu_remove_mem_partition(u32_t part_index)
{
u32_t region_index =
_get_region_index_by_type(THREAD_DOMAIN_PARTITION_REGION);
SYS_LOG_DBG("disable region 0x%x", region_index);
/* Disable region */
SYSMPU->WORD[region_index + part_index][0] = 0;
SYSMPU->WORD[region_index + part_index][1] = 0;
SYSMPU->WORD[region_index + part_index][2] = 0;
SYSMPU->WORD[region_index + part_index][3] = 0;
}
/**
* @brief get the maximum number of free regions for memory domain partitions
*/