2 * FreeRTOS Kernel <DEVELOPMENT BRANCH>
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3 * Copyright (C) 2021 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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37 /*-----------------------------------------------------------
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38 * Port specific definitions.
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40 * The settings in this file configure FreeRTOS correctly for the
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41 * given hardware and compiler.
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43 * These settings should not be altered.
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44 *-----------------------------------------------------------
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47 /* Type definitions. */
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48 #define portCHAR char
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49 #define portFLOAT float
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50 #define portDOUBLE double
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51 #define portLONG long
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52 #define portSHORT short
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53 #define portSTACK_TYPE uint32_t
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54 #define portBASE_TYPE long
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56 typedef portSTACK_TYPE StackType_t;
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57 typedef long BaseType_t;
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58 typedef unsigned long UBaseType_t;
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60 #if ( configUSE_16_BIT_TICKS == 1 )
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61 typedef uint16_t TickType_t;
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62 #define portMAX_DELAY ( TickType_t ) 0xffff
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64 typedef uint32_t TickType_t;
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65 #define portMAX_DELAY ( TickType_t ) 0xffffffffUL
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67 /* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
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68 * not need to be guarded with a critical section. */
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69 #define portTICK_TYPE_IS_ATOMIC 1
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71 /*-----------------------------------------------------------*/
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73 /* Architecture specifics. */
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74 #define portSTACK_GROWTH ( -1 )
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75 #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
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76 #define portBYTE_ALIGNMENT 8
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78 /* Constants used with memory barrier intrinsics. */
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79 #define portSY_FULL_READ_WRITE ( 15 )
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81 /*-----------------------------------------------------------*/
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83 /* Scheduler utilities. */
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84 #define portYIELD() \
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86 /* Set a PendSV to request a context switch. */ \
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87 portNVIC_INT_CTRL_REG = portNVIC_PENDSVSET_BIT; \
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89 /* Barriers are normally not required but do ensure the code is completely \
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90 * within the specified behaviour for the architecture. */ \
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91 __dsb( portSY_FULL_READ_WRITE ); \
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92 __isb( portSY_FULL_READ_WRITE ); \
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94 /*-----------------------------------------------------------*/
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96 #define portNVIC_INT_CTRL_REG ( *( ( volatile uint32_t * ) 0xe000ed04 ) )
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97 #define portNVIC_PENDSVSET_BIT ( 1UL << 28UL )
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98 #define portEND_SWITCHING_ISR( xSwitchRequired ) do { if( xSwitchRequired != pdFALSE ) portYIELD(); } while( 0 )
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99 #define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
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100 /*-----------------------------------------------------------*/
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102 /* Critical section management. */
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103 extern void vPortEnterCritical( void );
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104 extern void vPortExitCritical( void );
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106 #define portDISABLE_INTERRUPTS() vPortRaiseBASEPRI()
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107 #define portENABLE_INTERRUPTS() vPortSetBASEPRI( 0 )
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108 #define portENTER_CRITICAL() vPortEnterCritical()
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109 #define portEXIT_CRITICAL() vPortExitCritical()
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110 #define portSET_INTERRUPT_MASK_FROM_ISR() ulPortRaiseBASEPRI()
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111 #define portCLEAR_INTERRUPT_MASK_FROM_ISR( x ) vPortSetBASEPRI( x )
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113 /*-----------------------------------------------------------*/
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115 /* Tickless idle/low power functionality. */
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116 #ifndef portSUPPRESS_TICKS_AND_SLEEP
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117 extern void vPortSuppressTicksAndSleep( TickType_t xExpectedIdleTime );
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118 #define portSUPPRESS_TICKS_AND_SLEEP( xExpectedIdleTime ) vPortSuppressTicksAndSleep( xExpectedIdleTime )
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120 /*-----------------------------------------------------------*/
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122 /* Port specific optimisations. */
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123 #ifndef configUSE_PORT_OPTIMISED_TASK_SELECTION
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124 #define configUSE_PORT_OPTIMISED_TASK_SELECTION 1
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127 #if configUSE_PORT_OPTIMISED_TASK_SELECTION == 1
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129 /* Check the configuration. */
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130 #if ( configMAX_PRIORITIES > 32 )
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131 #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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134 /* Store/clear the ready priorities in a bit map. */
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135 #define portRECORD_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) |= ( 1UL << ( uxPriority ) )
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136 #define portRESET_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) &= ~( 1UL << ( uxPriority ) )
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138 /*-----------------------------------------------------------*/
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140 #define portGET_HIGHEST_PRIORITY( uxTopPriority, uxReadyPriorities ) uxTopPriority = ( 31UL - ( uint32_t ) __clz( ( uxReadyPriorities ) ) )
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142 #endif /* taskRECORD_READY_PRIORITY */
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143 /*-----------------------------------------------------------*/
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145 /* Task function macros as described on the FreeRTOS.org WEB site. These are
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146 * not necessary for to use this port. They are defined so the common demo files
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147 * (which build with all the ports) will build. */
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148 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void * pvParameters )
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149 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void * pvParameters )
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150 /*-----------------------------------------------------------*/
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152 #ifdef configASSERT
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153 void vPortValidateInterruptPriority( void );
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154 #define portASSERT_IF_INTERRUPT_PRIORITY_INVALID() vPortValidateInterruptPriority()
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157 /* portNOP() is not required by this port. */
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160 #define portINLINE __inline
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162 #ifndef portFORCE_INLINE
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163 #define portFORCE_INLINE __forceinline
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166 /*-----------------------------------------------------------*/
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168 static portFORCE_INLINE void vPortSetBASEPRI( uint32_t ulBASEPRI )
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172 /* Barrier instructions are not used as this function is only used to
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173 * lower the BASEPRI value. */
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175 msr basepri, ulBASEPRI
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179 /*-----------------------------------------------------------*/
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181 static portFORCE_INLINE void vPortRaiseBASEPRI( void )
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183 uint32_t ulNewBASEPRI = configMAX_SYSCALL_INTERRUPT_PRIORITY;
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187 /* Set BASEPRI to the max syscall priority to effect a critical
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190 msr basepri, ulNewBASEPRI
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196 /*-----------------------------------------------------------*/
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198 static portFORCE_INLINE void vPortClearBASEPRIFromISR( void )
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202 /* Set BASEPRI to 0 so no interrupts are masked. This function is only
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203 * used to lower the mask in an interrupt, so memory barriers are not
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210 /*-----------------------------------------------------------*/
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212 static portFORCE_INLINE uint32_t ulPortRaiseBASEPRI( void )
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214 uint32_t ulReturn, ulNewBASEPRI = configMAX_SYSCALL_INTERRUPT_PRIORITY;
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218 /* Set BASEPRI to the max syscall priority to effect a critical
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221 mrs ulReturn, basepri
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222 msr basepri, ulNewBASEPRI
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230 /*-----------------------------------------------------------*/
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232 static portFORCE_INLINE BaseType_t xPortIsInsideInterrupt( void )
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234 uint32_t ulCurrentInterrupt;
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235 BaseType_t xReturn;
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237 /* Obtain the number of the currently executing interrupt. */
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241 mrs ulCurrentInterrupt, ipsr
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245 if( ulCurrentInterrupt == 0 )
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264 #endif /* PORTMACRO_H */
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