diff options
Diffstat (limited to 'os/hal/ports/common/ARMCMx/mpu.h')
| -rw-r--r-- | os/hal/ports/common/ARMCMx/mpu.h | 75 |
1 files changed, 67 insertions, 8 deletions
diff --git a/os/hal/ports/common/ARMCMx/mpu.h b/os/hal/ports/common/ARMCMx/mpu.h index 5d8c244ba..ec025e112 100644 --- a/os/hal/ports/common/ARMCMx/mpu.h +++ b/os/hal/ports/common/ARMCMx/mpu.h @@ -33,6 +33,10 @@ * @name MPU registers definitions
* @{
*/
+#define MPU_TYPE_SEPARATED (1U << 0U)
+#define MPU_TYPE_DREGION(n) (((n) >> 8U) & 255U)
+#define MPU_TYPE_IREGION(n) (((n) >> 16U) & 255U)
+
#define MPU_CTRL_ENABLE (1U << 0U)
#define MPU_CTRL_HFNMIENA (1U << 1U)
#define MPU_CTRL_PRIVDEFENA (1U << 2U)
@@ -80,14 +84,14 @@ #define MPU_RASR_SRD_MASK (255U << 8U)
#define MPU_RASR_SRD(n) ((n) << 8U)
#define MPU_RASR_SRD_ALL (0U << 8U)
-#define MPU_RASR_SRD_DISABLE_SUB1 (1U << 8U)
-#define MPU_RASR_SRD_DISABLE_SUB2 (2U << 8U)
-#define MPU_RASR_SRD_DISABLE_SUB3 (4U << 8U)
-#define MPU_RASR_SRD_DISABLE_SUB4 (8U << 8U)
-#define MPU_RASR_SRD_DISABLE_SUB5 (16U << 8U)
-#define MPU_RASR_SRD_DISABLE_SUB6 (32U << 8U)
-#define MPU_RASR_SRD_DISABLE_SUB7 (64U << 8U)
-#define MPU_RASR_SRD_DISABLE_SUB8 (128U << 8U)
+#define MPU_RASR_SRD_DISABLE_SUB0 (1U << 8U)
+#define MPU_RASR_SRD_DISABLE_SUB1 (2U << 8U)
+#define MPU_RASR_SRD_DISABLE_SUB2 (4U << 8U)
+#define MPU_RASR_SRD_DISABLE_SUB3 (8U << 8U)
+#define MPU_RASR_SRD_DISABLE_SUB4 (16U << 8U)
+#define MPU_RASR_SRD_DISABLE_SUB5 (32U << 8U)
+#define MPU_RASR_SRD_DISABLE_SUB6 (64U << 8U)
+#define MPU_RASR_SRD_DISABLE_SUB7 (128U << 8U)
#define MPU_RASR_ATTR_B (1U << 16U)
#define MPU_RASR_ATTR_C (1U << 17U)
#define MPU_RASR_ATTR_S (1U << 18U)
@@ -117,6 +121,20 @@ #define MPU_RASR_ATTR_NON_SHARED_DEVICE (MPU_RASR_ATTR_TEX(2))
/** @} */
+/**
+ * @name Region identifiers
+ * @{
+ */
+#define MPU_REGION_0 0U
+#define MPU_REGION_1 1U
+#define MPU_REGION_2 2U
+#define MPU_REGION_3 3U
+#define MPU_REGION_4 4U
+#define MPU_REGION_5 5U
+#define MPU_REGION_6 6U
+#define MPU_REGION_7 7U
+/** @} */
+
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
@@ -133,6 +151,47 @@ /* Driver macros. */
/*===========================================================================*/
+/**
+ * @brief Enables the MPU.
+ * @note MEMFAULENA is enabled in SCB_SHCSR.
+ *
+ * @param[in] ctrl MPU control modes as defined in @p MPU_CTRL register,
+ * the enable bit is enforced
+ *
+ * @api
+ */
+#define mpuEnable(ctrl) { \
+ MPU->CTRL = ((uint32_t)ctrl) | MPU_CTRL_ENABLE; \
+ SCB->SHCSR |= SCB_SHCSR_MEMFAULTENA_Msk; \
+}
+
+/**
+ * @brief Disables the MPU.
+ * @note MEMFAULENA is disabled in SCB_SHCSR.
+ *
+ * @api
+ */
+#define mpuDisable() { \
+ SCB->SHCSR &= ~SCB_SHCSR_MEMFAULTENA_Msk; \
+ MPU->CTRL = 0; \
+}
+
+/**
+ * @brief Configures an MPU region.
+ *
+ * @param[in] region the region number
+ * @param[in] address start address of the region, note, there are alignment
+ * constraints
+ * @param[in] attribs attributes mask as defined in @p MPU_RASR register
+ *
+ * @api
+ */
+#define mpuConfigureRegion(region, addr, attribs) { \
+ MPU->RNR = ((uint32_t)region); \
+ MPU->RBAR = ((uint32_t)addr); \
+ MPU->RASR = ((uint32_t)attribs); \
+}
+
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
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