Diff: TARGET_LPC1768/mpu_armv7.h

Revision:

160:5571c4ff569f

Child:

169:a7c7b631e539

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TARGET_LPC1768/mpu_armv7.h	Wed Jan 17 16:13:02 2018 +0000
@@ -0,0 +1,191 @@
+/******************************************************************************
+ * @file     mpu_armv7.h
+ * @brief    CMSIS MPU API for ARMv7 MPU
+ * @version  V5.0.3
+ * @date     09. August 2017
+ ******************************************************************************/
+/*
+ * Copyright (c) 2017 ARM Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the License); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+#ifndef ARM_MPU_ARMV7_H
+#define ARM_MPU_ARMV7_H
+
+#define ARM_MPU_REGION_SIZE_32B      ((uint8_t)0x04U)
+#define ARM_MPU_REGION_SIZE_64B      ((uint8_t)0x05U)
+#define ARM_MPU_REGION_SIZE_128B     ((uint8_t)0x06U)
+#define ARM_MPU_REGION_SIZE_256B     ((uint8_t)0x07U)
+#define ARM_MPU_REGION_SIZE_512B     ((uint8_t)0x08U)
+#define ARM_MPU_REGION_SIZE_1KB      ((uint8_t)0x09U)
+#define ARM_MPU_REGION_SIZE_2KB      ((uint8_t)0x0AU)
+#define ARM_MPU_REGION_SIZE_4KB      ((uint8_t)0x0BU)
+#define ARM_MPU_REGION_SIZE_8KB      ((uint8_t)0x0CU)
+#define ARM_MPU_REGION_SIZE_16KB     ((uint8_t)0x0DU)
+#define ARM_MPU_REGION_SIZE_32KB     ((uint8_t)0x0EU)
+#define ARM_MPU_REGION_SIZE_64KB     ((uint8_t)0x0FU)
+#define ARM_MPU_REGION_SIZE_128KB    ((uint8_t)0x10U)
+#define ARM_MPU_REGION_SIZE_256KB    ((uint8_t)0x11U)
+#define ARM_MPU_REGION_SIZE_512KB    ((uint8_t)0x12U)
+#define ARM_MPU_REGION_SIZE_1MB      ((uint8_t)0x13U)
+#define ARM_MPU_REGION_SIZE_2MB      ((uint8_t)0x14U)
+#define ARM_MPU_REGION_SIZE_4MB      ((uint8_t)0x15U)
+#define ARM_MPU_REGION_SIZE_8MB      ((uint8_t)0x16U)
+#define ARM_MPU_REGION_SIZE_16MB     ((uint8_t)0x17U)
+#define ARM_MPU_REGION_SIZE_32MB     ((uint8_t)0x18U)
+#define ARM_MPU_REGION_SIZE_64MB     ((uint8_t)0x19U)
+#define ARM_MPU_REGION_SIZE_128MB    ((uint8_t)0x1AU)
+#define ARM_MPU_REGION_SIZE_256MB    ((uint8_t)0x1BU)
+#define ARM_MPU_REGION_SIZE_512MB    ((uint8_t)0x1CU)
+#define ARM_MPU_REGION_SIZE_1GB      ((uint8_t)0x1DU)
+#define ARM_MPU_REGION_SIZE_2GB      ((uint8_t)0x1EU)
+#define ARM_MPU_REGION_SIZE_4GB      ((uint8_t)0x1FU)
+
+#define ARM_MPU_AP_NONE 0U 
+#define ARM_MPU_AP_PRIV 1U
+#define ARM_MPU_AP_URO  2U
+#define ARM_MPU_AP_FULL 3U
+#define ARM_MPU_AP_PRO  5U
+#define ARM_MPU_AP_RO   6U
+
+/** MPU Region Base Address Register Value
+*
+* \param Region The region to be configured, number 0 to 15.
+* \param BaseAddress The base address for the region.
+*/
+#define ARM_MPU_RBAR(Region, BaseAddress) \
+  (((BaseAddress) & MPU_RBAR_ADDR_Msk) |  \
+   ((Region) & MPU_RBAR_REGION_Msk)    |  \
+   (MPU_RBAR_VALID_Msk))
+
+/**
+* MPU Region Attribut and Size Register Value
+* 
+* \param DisableExec       Instruction access disable bit, 1= disable instruction fetches.
+* \param AccessPermission  Data access permissions, allows you to configure read/write access for User and Privileged mode.
+* \param TypeExtField      Type extension field, allows you to configure memory access type, for example strongly ordered, peripheral.
+* \param IsShareable       Region is shareable between multiple bus masters.
+* \param IsCacheable       Region is cacheable, i.e. its value may be kept in cache.
+* \param IsBufferable      Region is bufferable, i.e. using write-back caching. Cacheable but non-bufferable regions use write-through policy.
+* \param SubRegionDisable  Sub-region disable field.
+* \param Size              Region size of the region to be configured, for example 4K, 8K.
+*/                         
+#define ARM_MPU_RASR(DisableExec, AccessPermission, TypeExtField, IsShareable, IsCacheable, IsBufferable, SubRegionDisable, Size) \
+  ((((DisableExec     ) << MPU_RASR_XN_Pos)     & MPU_RASR_XN_Msk)     | \
+   (((AccessPermission) << MPU_RASR_AP_Pos)     & MPU_RASR_AP_Msk)     | \
+   (((TypeExtField    ) << MPU_RASR_TEX_Pos)    & MPU_RASR_TEX_Msk)    | \
+   (((IsShareable     ) << MPU_RASR_S_Pos)      & MPU_RASR_S_Msk)      | \
+   (((IsCacheable     ) << MPU_RASR_C_Pos)      & MPU_RASR_C_Msk)      | \
+   (((IsBufferable    ) << MPU_RASR_B_Pos)      & MPU_RASR_B_Msk)      | \
+   (((SubRegionDisable) << MPU_RASR_SRD_Pos)    & MPU_RASR_SRD_Msk)    | \
+   (((Size            ) << MPU_RASR_SIZE_Pos)   & MPU_RASR_SIZE_Msk)   | \
+   (MPU_RASR_ENABLE_Msk))
+
+
+/**
+* Struct for a single MPU Region
+*/
+typedef struct _ARM_MPU_Region_t {
+  uint32_t RBAR; //!< The region base address register value (RBAR)
+  uint32_t RASR; //!< The region attribute and size register value (RASR) \ref MPU_RASR
+} ARM_MPU_Region_t;
+    
+/** Enable the MPU.
+* \param MPU_Control Default access permissions for unconfigured regions.
+*/
+__STATIC_INLINE void ARM_MPU_Enable(uint32_t MPU_Control)
+{
+  __DSB();
+  __ISB();
+  MPU->CTRL = MPU_Control | MPU_CTRL_ENABLE_Msk;
+#ifdef SCB_SHCSR_MEMFAULTENA_Msk
+  SCB->SHCSR |= SCB_SHCSR_MEMFAULTENA_Msk;
+#endif
+}
+
+/** Disable the MPU.
+*/
+__STATIC_INLINE void ARM_MPU_Disable(void)
+{
+  __DSB();
+  __ISB();
+#ifdef SCB_SHCSR_MEMFAULTENA_Msk
+  SCB->SHCSR &= ~SCB_SHCSR_MEMFAULTENA_Msk;
+#endif
+  MPU->CTRL  &= ~MPU_CTRL_ENABLE_Msk;
+}
+
+/** Clear and disable the given MPU region.
+* \param rnr Region number to be cleared.
+*/
+__STATIC_INLINE void ARM_MPU_ClrRegion(uint32_t rnr)
+{
+  MPU->RNR = rnr;
+  MPU->RASR = 0U;
+}
+
+/** Configure an MPU region.
+* \param rbar Value for RBAR register.
+* \param rsar Value for RSAR register.
+*/   
+__STATIC_INLINE void ARM_MPU_SetRegion(uint32_t rbar, uint32_t rasr)
+{
+  MPU->RBAR = rbar;
+  MPU->RASR = rasr;
+}
+
+/** Configure the given MPU region.
+* \param rnr Region number to be configured.
+* \param rbar Value for RBAR register.
+* \param rsar Value for RSAR register.
+*/   
+__STATIC_INLINE void ARM_MPU_SetRegionEx(uint32_t rnr, uint32_t rbar, uint32_t rasr)
+{
+  MPU->RNR = rnr;
+  MPU->RBAR = rbar;
+  MPU->RASR = rasr;
+}
+
+/** Memcopy with strictly ordered memory access, e.g. for register targets.
+* \param dst Destination data is copied to.
+* \param src Source data is copied from.
+* \param len Amount of data words to be copied.
+*/
+__STATIC_INLINE void orderedCpy(volatile uint32_t* dst, const uint32_t* __RESTRICT src, uint32_t len)
+{
+  uint32_t i;
+  for (i = 0U; i < len; ++i) 
+  {
+    dst[i] = src[i];
+  }
+}
+
+/** Load the given number of MPU regions from a table.
+* \param table Pointer to the MPU configuration table.
+* \param cnt Amount of regions to be configured.
+*/
+__STATIC_INLINE void ARM_MPU_Load(ARM_MPU_Region_t const* table, uint32_t cnt) 
+{
+  static const uint32_t rowWordSize = sizeof(ARM_MPU_Region_t)/4U;
+  if (cnt > MPU_TYPE_RALIASES) {
+    orderedCpy(&(MPU->RBAR), &(table->RBAR), MPU_TYPE_RALIASES*rowWordSize);
+    ARM_MPU_Load(table+MPU_TYPE_RALIASES, cnt-MPU_TYPE_RALIASES);
+  } else {
+    orderedCpy(&(MPU->RBAR), &(table->RBAR), cnt*rowWordSize);
+  }
+}
+
+#endif