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 * SPDX-License-Identifier: MIT
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy of
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8 * this software and associated documentation files (the "Software"), to deal in
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9 * the Software without restriction, including without limitation the rights to
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10 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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11 * the Software, and to permit persons to whom the Software is furnished to do so,
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12 * subject to the following conditions:
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14 * The above copyright notice and this permission notice shall be included in all
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15 * copies or substantial portions of the Software.
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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19 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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20 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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21 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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24 * https://www.FreeRTOS.org
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25 * https://github.com/FreeRTOS
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29 /*-----------------------------------------------------------
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30 * Portable layer API. Each function must be defined for each port.
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31 *----------------------------------------------------------*/
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36 /* Each FreeRTOS port has a unique portmacro.h header file. Originally a
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37 * pre-processor definition was used to ensure the pre-processor found the correct
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38 * portmacro.h file for the port being used. That scheme was deprecated in favour
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39 * of setting the compiler's include path such that it found the correct
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40 * portmacro.h file - removing the need for the constant and allowing the
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41 * portmacro.h file to be located anywhere in relation to the port being used.
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42 * Purely for reasons of backward compatibility the old method is still valid, but
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43 * to make it clear that new projects should not use it, support for the port
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44 * specific constants has been moved into the deprecated_definitions.h header
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46 #include "deprecated_definitions.h"
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48 /* If portENTER_CRITICAL is not defined then including deprecated_definitions.h
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49 * did not result in a portmacro.h header file being included - and it should be
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50 * included here. In this case the path to the correct portmacro.h header file
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51 * must be set in the compiler's include path. */
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52 #ifndef portENTER_CRITICAL
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53 #include "portmacro.h"
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56 #if portBYTE_ALIGNMENT == 32
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57 #define portBYTE_ALIGNMENT_MASK ( 0x001f )
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58 #elif portBYTE_ALIGNMENT == 16
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59 #define portBYTE_ALIGNMENT_MASK ( 0x000f )
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60 #elif portBYTE_ALIGNMENT == 8
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61 #define portBYTE_ALIGNMENT_MASK ( 0x0007 )
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62 #elif portBYTE_ALIGNMENT == 4
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63 #define portBYTE_ALIGNMENT_MASK ( 0x0003 )
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64 #elif portBYTE_ALIGNMENT == 2
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65 #define portBYTE_ALIGNMENT_MASK ( 0x0001 )
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66 #elif portBYTE_ALIGNMENT == 1
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67 #define portBYTE_ALIGNMENT_MASK ( 0x0000 )
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68 #else /* if portBYTE_ALIGNMENT == 32 */
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69 #error "Invalid portBYTE_ALIGNMENT definition"
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70 #endif /* if portBYTE_ALIGNMENT == 32 */
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72 #ifndef portUSING_MPU_WRAPPERS
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73 #define portUSING_MPU_WRAPPERS 0
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76 #ifndef portNUM_CONFIGURABLE_REGIONS
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77 #define portNUM_CONFIGURABLE_REGIONS 1
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80 #ifndef portHAS_STACK_OVERFLOW_CHECKING
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81 #define portHAS_STACK_OVERFLOW_CHECKING 0
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84 #ifndef portARCH_NAME
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85 #define portARCH_NAME NULL
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88 #ifndef configSTACK_ALLOCATION_FROM_SEPARATE_HEAP
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89 /* Defaults to 0 for backward compatibility. */
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90 #define configSTACK_ALLOCATION_FROM_SEPARATE_HEAP 0
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99 #include "mpu_wrappers.h"
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102 * Setup the stack of a new task so it is ready to be placed under the
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103 * scheduler control. The registers have to be placed on the stack in
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104 * the order that the port expects to find them.
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107 #if ( portUSING_MPU_WRAPPERS == 1 )
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108 #if ( portHAS_STACK_OVERFLOW_CHECKING == 1 )
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109 StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
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110 StackType_t * pxEndOfStack,
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111 TaskFunction_t pxCode,
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112 void * pvParameters,
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113 BaseType_t xRunPrivileged ) PRIVILEGED_FUNCTION;
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115 StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
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116 TaskFunction_t pxCode,
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117 void * pvParameters,
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118 BaseType_t xRunPrivileged ) PRIVILEGED_FUNCTION;
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120 #else /* if ( portUSING_MPU_WRAPPERS == 1 ) */
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121 #if ( portHAS_STACK_OVERFLOW_CHECKING == 1 )
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122 StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
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123 StackType_t * pxEndOfStack,
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124 TaskFunction_t pxCode,
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125 void * pvParameters ) PRIVILEGED_FUNCTION;
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127 StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
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128 TaskFunction_t pxCode,
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129 void * pvParameters ) PRIVILEGED_FUNCTION;
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131 #endif /* if ( portUSING_MPU_WRAPPERS == 1 ) */
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133 /* Used by heap_5.c to define the start address and size of each memory region
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134 * that together comprise the total FreeRTOS heap space. */
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135 typedef struct HeapRegion
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137 uint8_t * pucStartAddress;
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138 size_t xSizeInBytes;
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141 /* Used to pass information about the heap out of vPortGetHeapStats(). */
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142 typedef struct xHeapStats
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144 size_t xAvailableHeapSpaceInBytes; /* The total heap size currently available - this is the sum of all the free blocks, not the largest block that can be allocated. */
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145 size_t xSizeOfLargestFreeBlockInBytes; /* The maximum size, in bytes, of all the free blocks within the heap at the time vPortGetHeapStats() is called. */
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146 size_t xSizeOfSmallestFreeBlockInBytes; /* The minimum size, in bytes, of all the free blocks within the heap at the time vPortGetHeapStats() is called. */
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147 size_t xNumberOfFreeBlocks; /* The number of free memory blocks within the heap at the time vPortGetHeapStats() is called. */
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148 size_t xMinimumEverFreeBytesRemaining; /* The minimum amount of total free memory (sum of all free blocks) there has been in the heap since the system booted. */
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149 size_t xNumberOfSuccessfulAllocations; /* The number of calls to pvPortMalloc() that have returned a valid memory block. */
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150 size_t xNumberOfSuccessfulFrees; /* The number of calls to vPortFree() that has successfully freed a block of memory. */
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154 * Used to define multiple heap regions for use by heap_5.c. This function
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155 * must be called before any calls to pvPortMalloc() - not creating a task,
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156 * queue, semaphore, mutex, software timer, event group, etc. will result in
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157 * pvPortMalloc being called.
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159 * pxHeapRegions passes in an array of HeapRegion_t structures - each of which
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160 * defines a region of memory that can be used as the heap. The array is
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161 * terminated by a HeapRegions_t structure that has a size of 0. The region
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162 * with the lowest start address must appear first in the array.
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164 void vPortDefineHeapRegions( const HeapRegion_t * const pxHeapRegions ) PRIVILEGED_FUNCTION;
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167 * Returns a HeapStats_t structure filled with information about the current
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170 void vPortGetHeapStats( HeapStats_t * pxHeapStats );
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173 * Map to the memory management routines required for the port.
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175 void * pvPortMalloc( size_t xSize ) PRIVILEGED_FUNCTION;
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176 void * pvPortCalloc( size_t xNum,
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177 size_t xSize ) PRIVILEGED_FUNCTION;
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178 void vPortFree( void * pv ) PRIVILEGED_FUNCTION;
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179 void vPortInitialiseBlocks( void ) PRIVILEGED_FUNCTION;
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180 size_t xPortGetFreeHeapSize( void ) PRIVILEGED_FUNCTION;
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181 size_t xPortGetMinimumEverFreeHeapSize( void ) PRIVILEGED_FUNCTION;
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183 #if ( configSTACK_ALLOCATION_FROM_SEPARATE_HEAP == 1 )
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184 void * pvPortMallocStack( size_t xSize ) PRIVILEGED_FUNCTION;
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185 void vPortFreeStack( void * pv ) PRIVILEGED_FUNCTION;
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187 #define pvPortMallocStack pvPortMalloc
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188 #define vPortFreeStack vPortFree
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191 #if ( configUSE_MALLOC_FAILED_HOOK == 1 )
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196 * void vApplicationMallocFailedHook( void )
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199 * This hook function is called when allocation failed.
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201 void vApplicationMallocFailedHook( void ); /*lint !e526 Symbol not defined as it is an application callback. */
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205 * Setup the hardware ready for the scheduler to take control. This generally
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206 * sets up a tick interrupt and sets timers for the correct tick frequency.
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208 BaseType_t xPortStartScheduler( void ) PRIVILEGED_FUNCTION;
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211 * Undo any hardware/ISR setup that was performed by xPortStartScheduler() so
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212 * the hardware is left in its original condition after the scheduler stops
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215 void vPortEndScheduler( void ) PRIVILEGED_FUNCTION;
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218 * The structures and methods of manipulating the MPU are contained within the
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221 * Fills the xMPUSettings structure with the memory region information
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222 * contained in xRegions.
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224 #if ( portUSING_MPU_WRAPPERS == 1 )
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225 struct xMEMORY_REGION;
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226 void vPortStoreTaskMPUSettings( xMPU_SETTINGS * xMPUSettings,
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227 const struct xMEMORY_REGION * const xRegions,
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228 StackType_t * pxBottomOfStack,
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229 uint32_t ulStackDepth ) PRIVILEGED_FUNCTION;
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238 #endif /* PORTABLE_H */
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