2 * FreeRTOS SMP Kernel V202110.00
3 * Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
5 * Permission is hereby granted, free of charge, to any person obtaining a copy of
6 * this software and associated documentation files (the "Software"), to deal in
7 * the Software without restriction, including without limitation the rights to
8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
9 * the Software, and to permit persons to whom the Software is furnished to do so,
10 * subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in all
13 * copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
17 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
18 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 * https://www.FreeRTOS.org
23 * https://github.com/FreeRTOS
36 /*-----------------------------------------------------------
37 * Port specific definitions.
39 * The settings in this file configure FreeRTOS correctly for the
40 * given hardware and compiler.
42 * These settings should not be altered.
43 *-----------------------------------------------------------
46 /* Type definitions. */
48 #define portFLOAT float
49 #define portDOUBLE double
51 #define portSHORT short
52 #define portSTACK_TYPE uint32_t
53 #define portBASE_TYPE long
55 typedef portSTACK_TYPE StackType_t;
56 typedef long BaseType_t;
57 typedef unsigned long UBaseType_t;
59 #if ( configUSE_16_BIT_TICKS == 1 )
60 typedef uint16_t TickType_t;
61 #define portMAX_DELAY ( TickType_t ) 0xffff
63 typedef uint32_t TickType_t;
64 #define portMAX_DELAY ( TickType_t ) 0xffffffffUL
66 /* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
67 * not need to be guarded with a critical section. */
68 #define portTICK_TYPE_IS_ATOMIC 1
70 /*-----------------------------------------------------------*/
72 /* MPU specific constants. */
73 #define portUSING_MPU_WRAPPERS 1
74 #define portPRIVILEGE_BIT ( 0x80000000UL )
76 #define portMPU_REGION_READ_WRITE ( 0x03UL << 24UL )
77 #define portMPU_REGION_PRIVILEGED_READ_ONLY ( 0x05UL << 24UL )
78 #define portMPU_REGION_READ_ONLY ( 0x06UL << 24UL )
79 #define portMPU_REGION_PRIVILEGED_READ_WRITE ( 0x01UL << 24UL )
80 #define portMPU_REGION_PRIVILEGED_READ_WRITE_UNPRIV_READ_ONLY ( 0x02UL << 24UL )
81 #define portMPU_REGION_CACHEABLE_BUFFERABLE ( 0x07UL << 16UL )
82 #define portMPU_REGION_EXECUTE_NEVER ( 0x01UL << 28UL )
84 #define portUNPRIVILEGED_FLASH_REGION ( 0UL )
85 #define portPRIVILEGED_FLASH_REGION ( 1UL )
86 #define portPRIVILEGED_RAM_REGION ( 2UL )
87 #define portGENERAL_PERIPHERALS_REGION ( 3UL )
88 #define portSTACK_REGION ( 4UL )
89 #define portFIRST_CONFIGURABLE_REGION ( 5UL )
90 #define portLAST_CONFIGURABLE_REGION ( 7UL )
91 #define portNUM_CONFIGURABLE_REGIONS ( ( portLAST_CONFIGURABLE_REGION - portFIRST_CONFIGURABLE_REGION ) + 1 )
92 #define portTOTAL_NUM_REGIONS ( portNUM_CONFIGURABLE_REGIONS + 1 ) /* Plus one to make space for the stack region. */
94 #define portSWITCH_TO_USER_MODE() __asm volatile ( " mrs r0, control \n orr r0, #1 \n msr control, r0 " ::: "r0", "memory" )
96 typedef struct MPU_REGION_REGISTERS
98 uint32_t ulRegionBaseAddress;
99 uint32_t ulRegionAttribute;
100 } xMPU_REGION_REGISTERS;
102 /* Plus 1 to create space for the stack region. */
103 typedef struct MPU_SETTINGS
105 xMPU_REGION_REGISTERS xRegion[ portTOTAL_NUM_REGIONS ];
108 /* Architecture specifics. */
109 #define portSTACK_GROWTH ( -1 )
110 #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
111 #define portBYTE_ALIGNMENT 8
112 #define portDONT_DISCARD __attribute__( ( used ) )
113 /*-----------------------------------------------------------*/
115 /* SVC numbers for various services. */
116 #define portSVC_START_SCHEDULER 0
117 #define portSVC_YIELD 1
118 #define portSVC_RAISE_PRIVILEGE 2
120 /* Scheduler utilities. */
122 #define portYIELD() __asm volatile ( " SVC %0 \n"::"i" ( portSVC_YIELD ) : "memory" )
123 #define portYIELD_WITHIN_API() \
125 /* Set a PendSV to request a context switch. */ \
126 portNVIC_INT_CTRL_REG = portNVIC_PENDSVSET_BIT; \
128 /* Barriers are normally not required but do ensure the code is completely \
129 * within the specified behaviour for the architecture. */ \
130 __asm volatile ( "dsb" ::: "memory" ); \
131 __asm volatile ( "isb" ); \
134 #define portNVIC_INT_CTRL_REG ( *( ( volatile uint32_t * ) 0xe000ed04 ) )
135 #define portNVIC_PENDSVSET_BIT ( 1UL << 28UL )
136 #define portEND_SWITCHING_ISR( xSwitchRequired ) if( xSwitchRequired ) portNVIC_INT_CTRL_REG = portNVIC_PENDSVSET_BIT
137 #define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
138 /*-----------------------------------------------------------*/
140 /* Critical section management. */
141 extern void vPortEnterCritical( void );
142 extern void vPortExitCritical( void );
143 #define portSET_INTERRUPT_MASK_FROM_ISR() ulPortRaiseBASEPRI()
144 #define portCLEAR_INTERRUPT_MASK_FROM_ISR( x ) vPortSetBASEPRI( x )
145 #define portDISABLE_INTERRUPTS() vPortRaiseBASEPRI()
146 #define portENABLE_INTERRUPTS() vPortSetBASEPRI( 0 )
147 #define portENTER_CRITICAL() vPortEnterCritical()
148 #define portEXIT_CRITICAL() vPortExitCritical()
150 /*-----------------------------------------------------------*/
152 /* Task function macros as described on the FreeRTOS.org WEB site. These are
153 * not necessary for to use this port. They are defined so the common demo files
154 * (which build with all the ports) will build. */
155 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void * pvParameters )
156 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void * pvParameters )
157 /*-----------------------------------------------------------*/
159 /* Architecture specific optimisations. */
160 #ifndef configUSE_PORT_OPTIMISED_TASK_SELECTION
161 #define configUSE_PORT_OPTIMISED_TASK_SELECTION 1
164 #if configUSE_PORT_OPTIMISED_TASK_SELECTION == 1
166 /* Generic helper function. */
167 __attribute__( ( always_inline ) ) static inline uint8_t ucPortCountLeadingZeros( uint32_t ulBitmap )
171 __asm volatile ( "clz %0, %1" : "=r" ( ucReturn ) : "r" ( ulBitmap ) : "memory" );
176 /* Check the configuration. */
177 #if ( configMAX_PRIORITIES > 32 )
178 #error configUSE_PORT_OPTIMISED_TASK_SELECTION can only be set to 1 when configMAX_PRIORITIES is less than or equal to 32. It is very rare that a system requires more than 10 to 15 difference priorities as tasks that share a priority will time slice.
181 /* Store/clear the ready priorities in a bit map. */
182 #define portRECORD_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) |= ( 1UL << ( uxPriority ) )
183 #define portRESET_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) &= ~( 1UL << ( uxPriority ) )
185 /*-----------------------------------------------------------*/
187 #define portGET_HIGHEST_PRIORITY( uxTopPriority, uxReadyPriorities ) uxTopPriority = ( 31UL - ( uint32_t ) ucPortCountLeadingZeros( ( uxReadyPriorities ) ) )
189 #endif /* configUSE_PORT_OPTIMISED_TASK_SELECTION */
191 /*-----------------------------------------------------------*/
194 void vPortValidateInterruptPriority( void );
195 #define portASSERT_IF_INTERRUPT_PRIORITY_INVALID() vPortValidateInterruptPriority()
198 /* portNOP() is not required by this port. */
201 #define portINLINE __inline
203 #ifndef portFORCE_INLINE
204 #define portFORCE_INLINE inline __attribute__( ( always_inline ) )
206 /*-----------------------------------------------------------*/
208 extern BaseType_t xIsPrivileged( void );
209 extern void vResetPrivilege( void );
212 * @brief Checks whether or not the processor is privileged.
214 * @return 1 if the processor is already privileged, 0 otherwise.
216 #define portIS_PRIVILEGED() xIsPrivileged()
219 * @brief Raise an SVC request to raise privilege.
221 #define portRAISE_PRIVILEGE() __asm volatile ( "svc %0 \n" ::"i" ( portSVC_RAISE_PRIVILEGE ) : "memory" );
224 * @brief Lowers the privilege level by setting the bit 0 of the CONTROL
227 #define portRESET_PRIVILEGE() vResetPrivilege()
228 /*-----------------------------------------------------------*/
230 portFORCE_INLINE static BaseType_t xPortIsInsideInterrupt( void )
232 uint32_t ulCurrentInterrupt;
235 /* Obtain the number of the currently executing interrupt. */
236 __asm volatile ( "mrs %0, ipsr" : "=r" ( ulCurrentInterrupt )::"memory" );
238 if( ulCurrentInterrupt == 0 )
250 /*-----------------------------------------------------------*/
252 portFORCE_INLINE static void vPortRaiseBASEPRI( void )
254 uint32_t ulNewBASEPRI;
259 " msr basepri, %0 \n"\
262 : "=r" ( ulNewBASEPRI ) : "i" ( configMAX_SYSCALL_INTERRUPT_PRIORITY ) : "memory"
266 /*-----------------------------------------------------------*/
268 portFORCE_INLINE static uint32_t ulPortRaiseBASEPRI( void )
270 uint32_t ulOriginalBASEPRI, ulNewBASEPRI;
274 " mrs %0, basepri \n"\
276 " msr basepri, %1 \n"\
279 : "=r" ( ulOriginalBASEPRI ), "=r" ( ulNewBASEPRI ) : "i" ( configMAX_SYSCALL_INTERRUPT_PRIORITY ) : "memory"
282 /* This return will not be reached but is necessary to prevent compiler
284 return ulOriginalBASEPRI;
286 /*-----------------------------------------------------------*/
288 portFORCE_INLINE static void vPortSetBASEPRI( uint32_t ulNewMaskValue )
292 " msr basepri, %0 "::"r" ( ulNewMaskValue ) : "memory"
295 /*-----------------------------------------------------------*/
297 #define portMEMORY_BARRIER() __asm volatile ( "" ::: "memory" )
299 #ifndef configENFORCE_SYSTEM_CALLS_FROM_KERNEL_ONLY
300 #warning "configENFORCE_SYSTEM_CALLS_FROM_KERNEL_ONLY is not defined. We recommend defining it to 1 in FreeRTOSConfig.h for better security. https://www.FreeRTOS.org/FreeRTOS-V10.3.x.html"
301 #define configENFORCE_SYSTEM_CALLS_FROM_KERNEL_ONLY 0
303 /*-----------------------------------------------------------*/
308 #endif /* PORTMACRO_H */