2 * FreeRTOS Kernel V11.2.0
3 * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
5 * SPDX-License-Identifier: MIT
7 * Permission is hereby granted, free of charge, to any person obtaining a copy of
8 * this software and associated documentation files (the "Software"), to deal in
9 * the Software without restriction, including without limitation the rights to
10 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
11 * the Software, and to permit persons to whom the Software is furnished to do so,
12 * subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in all
15 * copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
19 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
20 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
21 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 * https://www.FreeRTOS.org
25 * https://github.com/FreeRTOS
38 /*------------------------------------------------------------------------------
39 * Port specific definitions.
41 * The settings in this file configure FreeRTOS correctly for the given hardware
44 * These settings should not be altered.
45 *------------------------------------------------------------------------------
48 #ifndef configENABLE_MPU
49 #error configENABLE_MPU must be defined in FreeRTOSConfig.h. Set configENABLE_MPU to 1 to enable the MPU or 0 to disable the MPU.
50 #endif /* configENABLE_MPU */
52 /*-----------------------------------------------------------*/
55 * @brief Type definitions.
58 #define portFLOAT float
59 #define portDOUBLE double
61 #define portSHORT short
62 #define portSTACK_TYPE uint32_t
63 #define portBASE_TYPE long
65 typedef portSTACK_TYPE StackType_t;
66 typedef long BaseType_t;
67 typedef unsigned long UBaseType_t;
69 #if ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_16_BITS )
70 typedef uint16_t TickType_t;
71 #define portMAX_DELAY ( TickType_t ) 0xffff
72 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
73 typedef uint32_t TickType_t;
74 #define portMAX_DELAY ( TickType_t ) 0xffffffffUL
76 /* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
77 * not need to be guarded with a critical section. */
78 #define portTICK_TYPE_IS_ATOMIC 1
80 #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
82 /*-----------------------------------------------------------*/
85 * Architecture specifics.
87 #define portARCH_NAME "Cortex-M0+"
88 #define portSTACK_GROWTH ( -1 )
89 #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
90 #define portBYTE_ALIGNMENT 8
92 #define portINLINE __inline
93 #ifndef portFORCE_INLINE
94 #define portFORCE_INLINE inline __attribute__( ( always_inline ) )
96 #define portDONT_DISCARD __attribute__( ( used ) )
97 /*-----------------------------------------------------------*/
100 * @brief Extern declarations.
102 extern BaseType_t xPortIsInsideInterrupt( void );
104 extern void vPortYield( void ) /* PRIVILEGED_FUNCTION */;
106 extern void vPortEnterCritical( void ) /* PRIVILEGED_FUNCTION */;
107 extern void vPortExitCritical( void ) /* PRIVILEGED_FUNCTION */;
109 extern uint32_t ulSetInterruptMask( void ) /* __attribute__(( naked )) PRIVILEGED_FUNCTION */;
110 extern void vClearInterruptMask( uint32_t ulMask ) /* __attribute__(( naked )) PRIVILEGED_FUNCTION */;
112 #if ( configENABLE_MPU == 1 )
113 extern BaseType_t xIsPrivileged( void ) /* __attribute__ (( naked )) */;
114 extern void vResetPrivilege( void ) /* __attribute__ (( naked )) */;
115 #endif /* configENABLE_MPU */
116 /*-----------------------------------------------------------*/
119 * @brief MPU specific constants.
121 #if ( configENABLE_MPU == 1 )
122 #define portUSING_MPU_WRAPPERS 1
123 #define portPRIVILEGE_BIT ( 0x80000000UL )
125 #define portPRIVILEGE_BIT ( 0x0UL )
126 #endif /* configENABLE_MPU */
128 /* Shareable (S), Cacheable (C) and Bufferable (B) bits for flash region. */
129 #ifndef configS_C_B_FLASH
130 #define configS_C_B_FLASH ( 0x07UL )
133 /* Shareable (S), Cacheable (C) and Bufferable (B) bits for RAM region. */
134 #ifndef configS_C_B_SRAM
135 #define configS_C_B_SRAM ( 0x07UL )
139 #define portPRIVILEGED_RAM_REGION ( 7UL )
140 #define portPRIVILEGED_FLASH_REGION ( 6UL )
141 #define portUNPRIVILEGED_FLASH_REGION ( 5UL )
142 #define portSTACK_REGION ( 4UL )
143 #define portFIRST_CONFIGURABLE_REGION ( 0UL )
144 #define portLAST_CONFIGURABLE_REGION ( 3UL )
145 #define portNUM_CONFIGURABLE_REGIONS ( 4UL )
146 #define portTOTAL_NUM_REGIONS ( portNUM_CONFIGURABLE_REGIONS + 1UL ) /* Plus one to make space for the stack region. */
148 /* MPU region sizes. This information is encoded in the SIZE bits of the MPU
149 * Region Attribute and Size Register (RASR). */
150 #define portMPU_REGION_SIZE_256B ( 0x07UL << 1UL )
151 #define portMPU_REGION_SIZE_512B ( 0x08UL << 1UL )
152 #define portMPU_REGION_SIZE_1KB ( 0x09UL << 1UL )
153 #define portMPU_REGION_SIZE_2KB ( 0x0AUL << 1UL )
154 #define portMPU_REGION_SIZE_4KB ( 0x0BUL << 1UL )
155 #define portMPU_REGION_SIZE_8KB ( 0x0CUL << 1UL )
156 #define portMPU_REGION_SIZE_16KB ( 0x0DUL << 1UL )
157 #define portMPU_REGION_SIZE_32KB ( 0x0EUL << 1UL )
158 #define portMPU_REGION_SIZE_64KB ( 0x0FUL << 1UL )
159 #define portMPU_REGION_SIZE_128KB ( 0x10UL << 1UL )
160 #define portMPU_REGION_SIZE_256KB ( 0x11UL << 1UL )
161 #define portMPU_REGION_SIZE_512KB ( 0x12UL << 1UL )
162 #define portMPU_REGION_SIZE_1MB ( 0x13UL << 1UL )
163 #define portMPU_REGION_SIZE_2MB ( 0x14UL << 1UL )
164 #define portMPU_REGION_SIZE_4MB ( 0x15UL << 1UL )
165 #define portMPU_REGION_SIZE_8MB ( 0x16UL << 1UL )
166 #define portMPU_REGION_SIZE_16MB ( 0x17UL << 1UL )
167 #define portMPU_REGION_SIZE_32MB ( 0x18UL << 1UL )
168 #define portMPU_REGION_SIZE_64MB ( 0x19UL << 1UL )
169 #define portMPU_REGION_SIZE_128MB ( 0x1AUL << 1UL )
170 #define portMPU_REGION_SIZE_256MB ( 0x1BUL << 1UL )
171 #define portMPU_REGION_SIZE_512MB ( 0x1CUL << 1UL )
172 #define portMPU_REGION_SIZE_1GB ( 0x1DUL << 1UL )
173 #define portMPU_REGION_SIZE_2GB ( 0x1EUL << 1UL )
174 #define portMPU_REGION_SIZE_4GB ( 0x1FUL << 1UL )
176 /* MPU memory types. This information is encoded in the S ( Shareable), C
177 * (Cacheable) and B (Bufferable) bits of the MPU Region Attribute and Size
178 * Register (RASR). */
179 #define portMPU_REGION_STRONGLY_ORDERED_SHAREABLE ( 0x0UL << 16UL ) /* S=NA, C=0, B=0. */
180 #define portMPU_REGION_DEVICE_SHAREABLE ( 0x1UL << 16UL ) /* S=NA, C=0, B=1. */
181 #define portMPU_REGION_NORMAL_OIWTNOWA_NONSHARED ( 0x2UL << 16UL ) /* S=0, C=1, B=0. */
182 #define portMPU_REGION_NORMAL_OIWTNOWA_SHARED ( 0x6UL << 16UL ) /* S=1, C=1, B=0. */
183 #define portMPU_REGION_NORMAL_OIWBNOWA_NONSHARED ( 0x3UL << 16UL ) /* S=0, C=1, B=1.*/
184 #define portMPU_REGION_NORMAL_OIWBNOWA_SHARED ( 0x7UL << 16UL ) /* S=1, C=1, B=1.*/
186 /* MPU access permissions. This information is encoded in the AP and XN bits of
187 * the MPU Region Attribute and Size Register (RASR). */
188 #define portMPU_REGION_PRIV_NA_UNPRIV_NA ( 0x0UL << 24UL )
189 #define portMPU_REGION_PRIV_RW_UNPRIV_NA ( 0x1UL << 24UL )
190 #define portMPU_REGION_PRIV_RW_UNPRIV_RO ( 0x2UL << 24UL )
191 #define portMPU_REGION_PRIV_RW_UNPRIV_RW ( 0x3UL << 24UL )
192 #define portMPU_REGION_PRIV_RO_UNPRIV_NA ( 0x5UL << 24UL )
193 #define portMPU_REGION_PRIV_RO_UNPRIV_RO ( 0x6UL << 24UL )
194 #define portMPU_REGION_EXECUTE_NEVER ( 0x1UL << 28UL )
196 #if ( configENABLE_MPU == 1 )
199 * @brief Settings to define an MPU region.
201 typedef struct MPURegionSettings
203 uint32_t ulRBAR; /**< MPU Region Base Address Register (RBAR) for the region. */
204 uint32_t ulRASR; /**< MPU Region Attribute and Size Register (RASR) for the region. */
205 } MPURegionSettings_t;
207 #if ( configUSE_MPU_WRAPPERS_V1 == 0 )
209 #ifndef configSYSTEM_CALL_STACK_SIZE
210 #error configSYSTEM_CALL_STACK_SIZE must be defined to the desired size of the system call stack in words for using MPU wrappers v2.
214 * @brief System call stack.
216 typedef struct SYSTEM_CALL_STACK_INFO
218 uint32_t ulSystemCallStackBuffer[ configSYSTEM_CALL_STACK_SIZE ];
219 uint32_t * pulSystemCallStack;
220 uint32_t * pulTaskStack;
221 uint32_t ulLinkRegisterAtSystemCallEntry;
222 } xSYSTEM_CALL_STACK_INFO;
224 #endif /* configUSE_MPU_WRAPPERS_V1 == 0 */
227 * @brief MPU settings as stored in the TCB.
231 * +----------+-----------------+---------------+-----+
232 * | r4-r11 | r0-r3, r12, LR, | PSP, CONTROL | |
233 * | | PC, xPSR | EXC_RETURN | |
234 * +----------+-----------------+---------------+-----+
236 * <---------><----------------><---------------><---->
239 #define CONTEXT_SIZE 20
241 /* Flags used for xMPU_SETTINGS.ulTaskFlags member. */
242 #define portSTACK_FRAME_HAS_PADDING_FLAG ( 1UL << 0UL )
243 #define portTASK_IS_PRIVILEGED_FLAG ( 1UL << 1UL )
245 /* Size of an Access Control List (ACL) entry in bits. */
246 #define portACL_ENTRY_SIZE_BITS ( 32U )
248 typedef struct MPU_SETTINGS
250 MPURegionSettings_t xRegionsSettings[ portTOTAL_NUM_REGIONS ]; /**< Settings for 4 per task regions. */
251 uint32_t ulContext[ CONTEXT_SIZE ];
252 uint32_t ulTaskFlags;
254 #if ( configUSE_MPU_WRAPPERS_V1 == 0 )
255 xSYSTEM_CALL_STACK_INFO xSystemCallStackInfo;
256 #if ( configENABLE_ACCESS_CONTROL_LIST == 1 )
257 uint32_t ulAccessControlList[ ( configPROTECTED_KERNEL_OBJECT_POOL_SIZE / portACL_ENTRY_SIZE_BITS ) + 1 ];
262 #endif /* configENABLE_MPU == 1 */
263 /*-----------------------------------------------------------*/
266 * @brief SVC numbers.
268 #define portSVC_START_SCHEDULER 100
269 #define portSVC_RAISE_PRIVILEGE 101
270 #define portSVC_SYSTEM_CALL_EXIT 102
271 #define portSVC_YIELD 103
272 /*-----------------------------------------------------------*/
275 * @brief Scheduler utilities.
277 #if ( configENABLE_MPU == 1 )
278 #define portYIELD() __asm volatile ( "svc %0" ::"i" ( portSVC_YIELD ) : "memory" )
279 #define portYIELD_WITHIN_API() vPortYield()
281 #define portYIELD() vPortYield()
282 #define portYIELD_WITHIN_API() vPortYield()
285 #define portNVIC_INT_CTRL_REG ( *( ( volatile uint32_t * ) 0xe000ed04 ) )
286 #define portNVIC_PENDSVSET_BIT ( 1UL << 28UL )
287 #define portEND_SWITCHING_ISR( xSwitchRequired ) \
290 if( xSwitchRequired ) \
292 traceISR_EXIT_TO_SCHEDULER(); \
293 portNVIC_INT_CTRL_REG = portNVIC_PENDSVSET_BIT; \
300 #define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
301 /*-----------------------------------------------------------*/
304 * @brief Critical section management.
306 #define portSET_INTERRUPT_MASK_FROM_ISR() ulSetInterruptMask()
307 #define portCLEAR_INTERRUPT_MASK_FROM_ISR( x ) vClearInterruptMask( x )
308 #define portDISABLE_INTERRUPTS() __asm volatile ( " cpsid i " ::: "memory" )
309 #define portENABLE_INTERRUPTS() __asm volatile ( " cpsie i " ::: "memory" )
310 #define portENTER_CRITICAL() vPortEnterCritical()
311 #define portEXIT_CRITICAL() vPortExitCritical()
312 /*-----------------------------------------------------------*/
315 * @brief Tickless idle/low power functionality.
317 #ifndef portSUPPRESS_TICKS_AND_SLEEP
318 extern void vPortSuppressTicksAndSleep( TickType_t xExpectedIdleTime );
319 #define portSUPPRESS_TICKS_AND_SLEEP( xExpectedIdleTime ) vPortSuppressTicksAndSleep( xExpectedIdleTime )
321 /*-----------------------------------------------------------*/
324 * @brief Task function macros as described on the FreeRTOS.org website.
326 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void * pvParameters )
327 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void * pvParameters )
328 /*-----------------------------------------------------------*/
330 #if ( configENABLE_MPU == 1 )
333 * @brief Checks whether or not the processor is privileged.
335 * @return 1 if the processor is already privileged, 0 otherwise.
337 #define portIS_PRIVILEGED() xIsPrivileged()
340 * @brief Raise an SVC request to raise privilege.
342 * The SVC handler checks that the SVC was raised from a system call and only
343 * then it raises the privilege. If this is called from any other place,
344 * the privilege is not raised.
346 #define portRAISE_PRIVILEGE() __asm volatile ( "svc %0 \n" ::"i" ( portSVC_RAISE_PRIVILEGE ) : "memory" );
349 * @brief Lowers the privilege level by setting the bit 0 of the CONTROL
352 #define portRESET_PRIVILEGE() vResetPrivilege()
356 #define portIS_PRIVILEGED()
357 #define portRAISE_PRIVILEGE()
358 #define portRESET_PRIVILEGE()
360 #endif /* configENABLE_MPU */
361 /*-----------------------------------------------------------*/
363 #if ( configENABLE_MPU == 1 )
365 extern BaseType_t xPortIsTaskPrivileged( void );
368 * @brief Checks whether or not the calling task is privileged.
370 * @return pdTRUE if the calling task is privileged, pdFALSE otherwise.
372 #define portIS_TASK_PRIVILEGED() xPortIsTaskPrivileged()
374 #endif /* configENABLE_MPU == 1 */
375 /*-----------------------------------------------------------*/
380 #define portMEMORY_BARRIER() __asm volatile ( "" ::: "memory" )
381 /*-----------------------------------------------------------*/
389 #endif /* PORTMACRO_H */