2 * FreeRTOS Kernel V11.1.0
3 * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
5 * SPDX-License-Identifier: MIT
7 * Permission is hereby granted, free of charge, to any person obtaining a copy of
8 * this software and associated documentation files (the "Software"), to deal in
9 * the Software without restriction, including without limitation the rights to
10 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
11 * the Software, and to permit persons to whom the Software is furnished to do so,
12 * subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in all
15 * copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
19 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
20 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
21 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 * https://www.FreeRTOS.org
25 * https://github.com/FreeRTOS
29 /*-----------------------------------------------------------
30 * Portable layer API. Each function must be defined for each port.
31 *----------------------------------------------------------*/
36 /* Each FreeRTOS port has a unique portmacro.h header file. Originally a
37 * pre-processor definition was used to ensure the pre-processor found the correct
38 * portmacro.h file for the port being used. That scheme was deprecated in favour
39 * of setting the compiler's include path such that it found the correct
40 * portmacro.h file - removing the need for the constant and allowing the
41 * portmacro.h file to be located anywhere in relation to the port being used.
42 * Purely for reasons of backward compatibility the old method is still valid, but
43 * to make it clear that new projects should not use it, support for the port
44 * specific constants has been moved into the deprecated_definitions.h header
46 #include "deprecated_definitions.h"
48 /* If portENTER_CRITICAL is not defined then including deprecated_definitions.h
49 * did not result in a portmacro.h header file being included - and it should be
50 * included here. In this case the path to the correct portmacro.h header file
51 * must be set in the compiler's include path. */
52 #ifndef portENTER_CRITICAL
53 #include "portmacro.h"
56 #if portBYTE_ALIGNMENT == 32
57 #define portBYTE_ALIGNMENT_MASK ( 0x001f )
58 #elif portBYTE_ALIGNMENT == 16
59 #define portBYTE_ALIGNMENT_MASK ( 0x000f )
60 #elif portBYTE_ALIGNMENT == 8
61 #define portBYTE_ALIGNMENT_MASK ( 0x0007 )
62 #elif portBYTE_ALIGNMENT == 4
63 #define portBYTE_ALIGNMENT_MASK ( 0x0003 )
64 #elif portBYTE_ALIGNMENT == 2
65 #define portBYTE_ALIGNMENT_MASK ( 0x0001 )
66 #elif portBYTE_ALIGNMENT == 1
67 #define portBYTE_ALIGNMENT_MASK ( 0x0000 )
68 #else /* if portBYTE_ALIGNMENT == 32 */
69 #error "Invalid portBYTE_ALIGNMENT definition"
70 #endif /* if portBYTE_ALIGNMENT == 32 */
72 #ifndef portUSING_MPU_WRAPPERS
73 #define portUSING_MPU_WRAPPERS 0
76 #ifndef portNUM_CONFIGURABLE_REGIONS
77 #define portNUM_CONFIGURABLE_REGIONS 1
80 #ifndef portHAS_STACK_OVERFLOW_CHECKING
81 #define portHAS_STACK_OVERFLOW_CHECKING 0
85 #define portARCH_NAME NULL
88 #ifndef configSTACK_DEPTH_TYPE
89 #define configSTACK_DEPTH_TYPE StackType_t
92 #ifndef configSTACK_ALLOCATION_FROM_SEPARATE_HEAP
93 /* Defaults to 0 for backward compatibility. */
94 #define configSTACK_ALLOCATION_FROM_SEPARATE_HEAP 0
103 #include "mpu_wrappers.h"
106 * Setup the stack of a new task so it is ready to be placed under the
107 * scheduler control. The registers have to be placed on the stack in
108 * the order that the port expects to find them.
111 #if ( portUSING_MPU_WRAPPERS == 1 )
112 #if ( portHAS_STACK_OVERFLOW_CHECKING == 1 )
113 StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
114 StackType_t * pxEndOfStack,
115 TaskFunction_t pxCode,
117 BaseType_t xRunPrivileged,
118 xMPU_SETTINGS * xMPUSettings ) PRIVILEGED_FUNCTION;
120 StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
121 TaskFunction_t pxCode,
123 BaseType_t xRunPrivileged,
124 xMPU_SETTINGS * xMPUSettings ) PRIVILEGED_FUNCTION;
125 #endif /* if ( portHAS_STACK_OVERFLOW_CHECKING == 1 ) */
126 #else /* if ( portUSING_MPU_WRAPPERS == 1 ) */
127 #if ( portHAS_STACK_OVERFLOW_CHECKING == 1 )
128 StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
129 StackType_t * pxEndOfStack,
130 TaskFunction_t pxCode,
131 void * pvParameters ) PRIVILEGED_FUNCTION;
133 StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
134 TaskFunction_t pxCode,
135 void * pvParameters ) PRIVILEGED_FUNCTION;
137 #endif /* if ( portUSING_MPU_WRAPPERS == 1 ) */
139 /* Used by heap_5.c to define the start address and size of each memory region
140 * that together comprise the total FreeRTOS heap space. */
141 typedef struct HeapRegion
143 uint8_t * pucStartAddress;
147 /* Used to pass information about the heap out of vPortGetHeapStats(). */
148 typedef struct xHeapStats
150 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. */
151 size_t xSizeOfLargestFreeBlockInBytes; /* The maximum size, in bytes, of all the free blocks within the heap at the time vPortGetHeapStats() is called. */
152 size_t xSizeOfSmallestFreeBlockInBytes; /* The minimum size, in bytes, of all the free blocks within the heap at the time vPortGetHeapStats() is called. */
153 size_t xNumberOfFreeBlocks; /* The number of free memory blocks within the heap at the time vPortGetHeapStats() is called. */
154 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. */
155 size_t xNumberOfSuccessfulAllocations; /* The number of calls to pvPortMalloc() that have returned a valid memory block. */
156 size_t xNumberOfSuccessfulFrees; /* The number of calls to vPortFree() that has successfully freed a block of memory. */
160 * Used to define multiple heap regions for use by heap_5.c. This function
161 * must be called before any calls to pvPortMalloc() - not creating a task,
162 * queue, semaphore, mutex, software timer, event group, etc. will result in
163 * pvPortMalloc being called.
165 * pxHeapRegions passes in an array of HeapRegion_t structures - each of which
166 * defines a region of memory that can be used as the heap. The array is
167 * terminated by a HeapRegions_t structure that has a size of 0. The region
168 * with the lowest start address must appear first in the array.
170 void vPortDefineHeapRegions( const HeapRegion_t * const pxHeapRegions ) PRIVILEGED_FUNCTION;
173 * Returns a HeapStats_t structure filled with information about the current
176 void vPortGetHeapStats( HeapStats_t * pxHeapStats );
179 * Map to the memory management routines required for the port.
181 void * pvPortMalloc( size_t xWantedSize ) PRIVILEGED_FUNCTION;
182 void * pvPortCalloc( size_t xNum,
183 size_t xSize ) PRIVILEGED_FUNCTION;
184 void vPortFree( void * pv ) PRIVILEGED_FUNCTION;
185 void vPortInitialiseBlocks( void ) PRIVILEGED_FUNCTION;
186 size_t xPortGetFreeHeapSize( void ) PRIVILEGED_FUNCTION;
187 size_t xPortGetMinimumEverFreeHeapSize( void ) PRIVILEGED_FUNCTION;
189 #if ( configSTACK_ALLOCATION_FROM_SEPARATE_HEAP == 1 )
190 void * pvPortMallocStack( size_t xSize ) PRIVILEGED_FUNCTION;
191 void vPortFreeStack( void * pv ) PRIVILEGED_FUNCTION;
193 #define pvPortMallocStack pvPortMalloc
194 #define vPortFreeStack vPortFree
198 * This function resets the internal state of the heap module. It must be called
199 * by the application before restarting the scheduler.
201 void vPortHeapResetState( void ) PRIVILEGED_FUNCTION;
203 #if ( configUSE_MALLOC_FAILED_HOOK == 1 )
208 * void vApplicationMallocFailedHook( void )
211 * This hook function is called when allocation failed.
213 void vApplicationMallocFailedHook( void );
217 * Setup the hardware ready for the scheduler to take control. This generally
218 * sets up a tick interrupt and sets timers for the correct tick frequency.
220 BaseType_t xPortStartScheduler( void ) PRIVILEGED_FUNCTION;
223 * Undo any hardware/ISR setup that was performed by xPortStartScheduler() so
224 * the hardware is left in its original condition after the scheduler stops
227 void vPortEndScheduler( void ) PRIVILEGED_FUNCTION;
230 * The structures and methods of manipulating the MPU are contained within the
233 * Fills the xMPUSettings structure with the memory region information
234 * contained in xRegions.
236 #if ( portUSING_MPU_WRAPPERS == 1 )
237 struct xMEMORY_REGION;
238 void vPortStoreTaskMPUSettings( xMPU_SETTINGS * xMPUSettings,
239 const struct xMEMORY_REGION * const xRegions,
240 StackType_t * pxBottomOfStack,
241 configSTACK_DEPTH_TYPE uxStackDepth ) PRIVILEGED_FUNCTION;
245 * @brief Checks if the calling task is authorized to access the given buffer.
247 * @param pvBuffer The buffer which the calling task wants to access.
248 * @param ulBufferLength The length of the pvBuffer.
249 * @param ulAccessRequested The permissions that the calling task wants.
251 * @return pdTRUE if the calling task is authorized to access the buffer,
254 #if ( portUSING_MPU_WRAPPERS == 1 )
255 BaseType_t xPortIsAuthorizedToAccessBuffer( const void * pvBuffer,
256 uint32_t ulBufferLength,
257 uint32_t ulAccessRequested ) PRIVILEGED_FUNCTION;
261 * @brief Checks if the calling task is authorized to access the given kernel object.
263 * @param lInternalIndexOfKernelObject The index of the kernel object in the kernel
264 * object handle pool.
266 * @return pdTRUE if the calling task is authorized to access the kernel object,
269 #if ( ( portUSING_MPU_WRAPPERS == 1 ) && ( configUSE_MPU_WRAPPERS_V1 == 0 ) )
271 BaseType_t xPortIsAuthorizedToAccessKernelObject( int32_t lInternalIndexOfKernelObject ) PRIVILEGED_FUNCTION;
281 #endif /* PORTABLE_H */