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 /* Architecture specifics. */
73 #define portSTACK_GROWTH ( -1 )
74 #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
75 #define portBYTE_ALIGNMENT 8
76 #define portDONT_DISCARD __attribute__( ( used ) )
77 /*-----------------------------------------------------------*/
79 /* Scheduler utilities. */
82 /* Set a PendSV to request a context switch. */ \
83 portNVIC_INT_CTRL_REG = portNVIC_PENDSVSET_BIT; \
85 /* Barriers are normally not required but do ensure the code is completely \
86 * within the specified behaviour for the architecture. */ \
87 __asm volatile ( "dsb" ::: "memory" ); \
88 __asm volatile ( "isb" ); \
91 #define portNVIC_INT_CTRL_REG ( *( ( volatile uint32_t * ) 0xe000ed04 ) )
92 #define portNVIC_PENDSVSET_BIT ( 1UL << 28UL )
93 #define portEND_SWITCHING_ISR( xSwitchRequired ) if( xSwitchRequired != pdFALSE ) portYIELD()
94 #define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
95 /*-----------------------------------------------------------*/
97 /* Critical section management. */
98 extern void vPortEnterCritical( void );
99 extern void vPortExitCritical( void );
100 #define portSET_INTERRUPT_MASK_FROM_ISR() ulPortRaiseBASEPRI()
101 #define portCLEAR_INTERRUPT_MASK_FROM_ISR( x ) vPortSetBASEPRI( x )
102 #define portDISABLE_INTERRUPTS() vPortRaiseBASEPRI()
103 #define portENABLE_INTERRUPTS() vPortSetBASEPRI( 0 )
104 #define portENTER_CRITICAL() vPortEnterCritical()
105 #define portEXIT_CRITICAL() vPortExitCritical()
107 /*-----------------------------------------------------------*/
109 /* Task function macros as described on the FreeRTOS.org WEB site. These are
110 * not necessary for to use this port. They are defined so the common demo files
111 * (which build with all the ports) will build. */
112 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void * pvParameters )
113 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void * pvParameters )
114 /*-----------------------------------------------------------*/
116 /* Tickless idle/low power functionality. */
117 #ifndef portSUPPRESS_TICKS_AND_SLEEP
118 extern void vPortSuppressTicksAndSleep( TickType_t xExpectedIdleTime );
119 #define portSUPPRESS_TICKS_AND_SLEEP( xExpectedIdleTime ) vPortSuppressTicksAndSleep( xExpectedIdleTime )
121 /*-----------------------------------------------------------*/
123 /* Architecture specific optimisations. */
124 #ifndef configUSE_PORT_OPTIMISED_TASK_SELECTION
125 #define configUSE_PORT_OPTIMISED_TASK_SELECTION 1
128 #if configUSE_PORT_OPTIMISED_TASK_SELECTION == 1
130 /* Generic helper function. */
131 __attribute__( ( always_inline ) ) static inline uint8_t ucPortCountLeadingZeros( uint32_t ulBitmap )
135 __asm volatile ( "clz %0, %1" : "=r" ( ucReturn ) : "r" ( ulBitmap ) : "memory" );
140 /* Check the configuration. */
141 #if ( configMAX_PRIORITIES > 32 )
142 #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.
145 /* Store/clear the ready priorities in a bit map. */
146 #define portRECORD_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) |= ( 1UL << ( uxPriority ) )
147 #define portRESET_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) &= ~( 1UL << ( uxPriority ) )
149 /*-----------------------------------------------------------*/
151 #define portGET_HIGHEST_PRIORITY( uxTopPriority, uxReadyPriorities ) uxTopPriority = ( 31UL - ( uint32_t ) ucPortCountLeadingZeros( ( uxReadyPriorities ) ) )
153 #endif /* configUSE_PORT_OPTIMISED_TASK_SELECTION */
155 /*-----------------------------------------------------------*/
158 void vPortValidateInterruptPriority( void );
159 #define portASSERT_IF_INTERRUPT_PRIORITY_INVALID() vPortValidateInterruptPriority()
162 /* portNOP() is not required by this port. */
165 #define portINLINE __inline
167 #ifndef portFORCE_INLINE
168 #define portFORCE_INLINE inline __attribute__( ( always_inline ) )
171 portFORCE_INLINE static BaseType_t xPortIsInsideInterrupt( void )
173 uint32_t ulCurrentInterrupt;
176 /* Obtain the number of the currently executing interrupt. */
177 __asm volatile ( "mrs %0, ipsr" : "=r" ( ulCurrentInterrupt )::"memory" );
179 if( ulCurrentInterrupt == 0 )
191 /*-----------------------------------------------------------*/
193 portFORCE_INLINE static void vPortRaiseBASEPRI( void )
195 uint32_t ulNewBASEPRI;
200 " msr basepri, %0 \n"\
203 : "=r" ( ulNewBASEPRI ) : "i" ( configMAX_SYSCALL_INTERRUPT_PRIORITY ) : "memory"
207 /*-----------------------------------------------------------*/
209 portFORCE_INLINE static uint32_t ulPortRaiseBASEPRI( void )
211 uint32_t ulOriginalBASEPRI, ulNewBASEPRI;
215 " mrs %0, basepri \n"\
217 " msr basepri, %1 \n"\
220 : "=r" ( ulOriginalBASEPRI ), "=r" ( ulNewBASEPRI ) : "i" ( configMAX_SYSCALL_INTERRUPT_PRIORITY ) : "memory"
223 /* This return will not be reached but is necessary to prevent compiler
225 return ulOriginalBASEPRI;
227 /*-----------------------------------------------------------*/
229 portFORCE_INLINE static void vPortSetBASEPRI( uint32_t ulNewMaskValue )
233 " msr basepri, %0 "::"r" ( ulNewMaskValue ) : "memory"
236 /*-----------------------------------------------------------*/
238 #define portMEMORY_BARRIER() __asm volatile ( "" ::: "memory" )
244 #endif /* PORTMACRO_H */