2 * FreeRTOS Kernel V10.4.3
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3 * Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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5 * Permission is hereby granted, free of charge, to any person obtaining a copy of
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6 * this software and associated documentation files (the "Software"), to deal in
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7 * the Software without restriction, including without limitation the rights to
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8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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9 * the Software, and to permit persons to whom the Software is furnished to do so,
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10 * subject to the following conditions:
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12 * The above copyright notice and this permission notice shall be included in all
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13 * copies or substantial portions of the Software.
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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17 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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18 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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22 * https://www.FreeRTOS.org
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23 * https://github.com/FreeRTOS
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25 * 1 tab == 4 spaces!
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36 /*-----------------------------------------------------------
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37 * Port specific definitions.
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39 * The settings in this file configure FreeRTOS correctly for the
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40 * given hardware and compiler.
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42 * These settings should not be altered.
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43 *-----------------------------------------------------------
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46 /* Type definitions. */
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47 #define portCHAR char
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48 #define portFLOAT float
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49 #define portDOUBLE double
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50 #define portLONG long
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51 #define portSHORT short
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52 #define portSTACK_TYPE uint32_t
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53 #define portBASE_TYPE long
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55 typedef portSTACK_TYPE StackType_t;
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56 typedef long BaseType_t;
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57 typedef unsigned long UBaseType_t;
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59 #if ( configUSE_16_BIT_TICKS == 1 )
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60 typedef uint16_t TickType_t;
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61 #define portMAX_DELAY ( TickType_t ) 0xffff
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63 typedef uint32_t TickType_t;
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64 #define portMAX_DELAY ( TickType_t ) 0xffffffffUL
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66 /* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
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67 * not need to be guarded with a critical section. */
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68 #define portTICK_TYPE_IS_ATOMIC 1
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70 /*-----------------------------------------------------------*/
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72 /* Architecture specifics. */
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73 #define portSTACK_GROWTH ( -1 )
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74 #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
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75 #define portBYTE_ALIGNMENT 8
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76 #define portDONT_DISCARD __attribute__( ( used ) )
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77 /*-----------------------------------------------------------*/
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79 /* Scheduler utilities. */
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80 #define portYIELD() \
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82 /* Set a PendSV to request a context switch. */ \
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83 portNVIC_INT_CTRL_REG = portNVIC_PENDSVSET_BIT; \
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85 /* Barriers are normally not required but do ensure the code is completely \
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86 * within the specified behaviour for the architecture. */ \
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87 __asm volatile ( "dsb" ::: "memory" ); \
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88 __asm volatile ( "isb" ); \
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91 #define portNVIC_INT_CTRL_REG ( *( ( volatile uint32_t * ) 0xe000ed04 ) )
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92 #define portNVIC_PENDSVSET_BIT ( 1UL << 28UL )
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93 #define portEND_SWITCHING_ISR( xSwitchRequired ) if( xSwitchRequired != pdFALSE ) portYIELD()
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94 #define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
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95 /*-----------------------------------------------------------*/
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97 /* Critical section management. */
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98 extern void vPortEnterCritical( void );
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99 extern void vPortExitCritical( void );
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100 #define portSET_INTERRUPT_MASK_FROM_ISR() ulPortRaiseBASEPRI()
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101 #define portCLEAR_INTERRUPT_MASK_FROM_ISR( x ) vPortSetBASEPRI( x )
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102 #define portDISABLE_INTERRUPTS() vPortRaiseBASEPRI()
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103 #define portENABLE_INTERRUPTS() vPortSetBASEPRI( 0 )
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104 #define portENTER_CRITICAL() vPortEnterCritical()
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105 #define portEXIT_CRITICAL() vPortExitCritical()
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107 /*-----------------------------------------------------------*/
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109 /* Task function macros as described on the FreeRTOS.org WEB site. These are
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110 * not necessary for to use this port. They are defined so the common demo files
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111 * (which build with all the ports) will build. */
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112 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void * pvParameters )
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113 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void * pvParameters )
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114 /*-----------------------------------------------------------*/
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116 /* Tickless idle/low power functionality. */
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117 #ifndef portSUPPRESS_TICKS_AND_SLEEP
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118 extern void vPortSuppressTicksAndSleep( TickType_t xExpectedIdleTime );
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119 #define portSUPPRESS_TICKS_AND_SLEEP( xExpectedIdleTime ) vPortSuppressTicksAndSleep( xExpectedIdleTime )
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121 /*-----------------------------------------------------------*/
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123 /* Architecture specific optimisations. */
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124 #ifndef configUSE_PORT_OPTIMISED_TASK_SELECTION
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125 #define configUSE_PORT_OPTIMISED_TASK_SELECTION 1
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128 #if configUSE_PORT_OPTIMISED_TASK_SELECTION == 1
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130 /* Generic helper function. */
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131 __attribute__( ( always_inline ) ) static inline uint8_t ucPortCountLeadingZeros( uint32_t ulBitmap )
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135 __asm volatile ( "clz %0, %1" : "=r" ( ucReturn ) : "r" ( ulBitmap ) : "memory" );
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140 /* Check the configuration. */
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141 #if ( configMAX_PRIORITIES > 32 )
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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.
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145 /* Store/clear the ready priorities in a bit map. */
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146 #define portRECORD_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) |= ( 1UL << ( uxPriority ) )
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147 #define portRESET_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) &= ~( 1UL << ( uxPriority ) )
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149 /*-----------------------------------------------------------*/
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151 #define portGET_HIGHEST_PRIORITY( uxTopPriority, uxReadyPriorities ) uxTopPriority = ( 31UL - ( uint32_t ) ucPortCountLeadingZeros( ( uxReadyPriorities ) ) )
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153 #endif /* configUSE_PORT_OPTIMISED_TASK_SELECTION */
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155 /*-----------------------------------------------------------*/
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157 #ifdef configASSERT
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158 void vPortValidateInterruptPriority( void );
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159 #define portASSERT_IF_INTERRUPT_PRIORITY_INVALID() vPortValidateInterruptPriority()
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162 /* portNOP() is not required by this port. */
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165 #define portINLINE __inline
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167 #ifndef portFORCE_INLINE
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168 #define portFORCE_INLINE inline __attribute__( ( always_inline ) )
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171 /*-----------------------------------------------------------*/
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173 portFORCE_INLINE static BaseType_t xPortIsInsideInterrupt( void )
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175 uint32_t ulCurrentInterrupt;
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176 BaseType_t xReturn;
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178 /* Obtain the number of the currently executing interrupt. */
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179 __asm volatile ( "mrs %0, ipsr" : "=r" ( ulCurrentInterrupt )::"memory" );
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181 if( ulCurrentInterrupt == 0 )
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193 /*-----------------------------------------------------------*/
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195 portFORCE_INLINE static void vPortRaiseBASEPRI( void )
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197 uint32_t ulNewBASEPRI;
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202 " msr basepri, %0 \n"\
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205 : "=r" ( ulNewBASEPRI ) : "i" ( configMAX_SYSCALL_INTERRUPT_PRIORITY ) : "memory"
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209 /*-----------------------------------------------------------*/
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211 portFORCE_INLINE static uint32_t ulPortRaiseBASEPRI( void )
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213 uint32_t ulOriginalBASEPRI, ulNewBASEPRI;
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217 " mrs %0, basepri \n"\
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219 " msr basepri, %1 \n"\
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222 : "=r" ( ulOriginalBASEPRI ), "=r" ( ulNewBASEPRI ) : "i" ( configMAX_SYSCALL_INTERRUPT_PRIORITY ) : "memory"
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225 /* This return will not be reached but is necessary to prevent compiler
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227 return ulOriginalBASEPRI;
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229 /*-----------------------------------------------------------*/
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231 portFORCE_INLINE static void vPortSetBASEPRI( uint32_t ulNewMaskValue )
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235 " msr basepri, %0 "::"r" ( ulNewMaskValue ) : "memory"
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238 /*-----------------------------------------------------------*/
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240 #define portMEMORY_BARRIER() __asm volatile ( "" ::: "memory" )
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246 #endif /* PORTMACRO_H */
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