2 * FreeRTOS Kernel <DEVELOPMENT BRANCH>
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 portBASE_TYPE_ENTER_CRITICAL
89 #define portBASE_TYPE_ENTER_CRITICAL() taskENTER_CRITICAL()
92 #ifndef portBASE_TYPE_EXIT_CRITICAL
93 #define portBASE_TYPE_EXIT_CRITICAL() taskEXIT_CRITICAL()
96 #ifndef configSTACK_DEPTH_TYPE
97 #define configSTACK_DEPTH_TYPE StackType_t
100 #ifndef configSTACK_ALLOCATION_FROM_SEPARATE_HEAP
101 /* Defaults to 0 for backward compatibility. */
102 #define configSTACK_ALLOCATION_FROM_SEPARATE_HEAP 0
105 #include "mpu_wrappers.h"
114 * Setup the stack of a new task so it is ready to be placed under the
115 * scheduler control. The registers have to be placed on the stack in
116 * the order that the port expects to find them.
119 #if ( portUSING_MPU_WRAPPERS == 1 )
120 #if ( portHAS_STACK_OVERFLOW_CHECKING == 1 )
121 StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
122 StackType_t * pxEndOfStack,
123 TaskFunction_t pxCode,
125 BaseType_t xRunPrivileged,
126 xMPU_SETTINGS * xMPUSettings ) PRIVILEGED_FUNCTION;
128 StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
129 TaskFunction_t pxCode,
131 BaseType_t xRunPrivileged,
132 xMPU_SETTINGS * xMPUSettings ) PRIVILEGED_FUNCTION;
133 #endif /* if ( portHAS_STACK_OVERFLOW_CHECKING == 1 ) */
134 #else /* if ( portUSING_MPU_WRAPPERS == 1 ) */
135 #if ( portHAS_STACK_OVERFLOW_CHECKING == 1 )
136 StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
137 StackType_t * pxEndOfStack,
138 TaskFunction_t pxCode,
139 void * pvParameters ) PRIVILEGED_FUNCTION;
141 StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
142 TaskFunction_t pxCode,
143 void * pvParameters ) PRIVILEGED_FUNCTION;
145 #endif /* if ( portUSING_MPU_WRAPPERS == 1 ) */
147 /* Used by heap_5.c to define the start address and size of each memory region
148 * that together comprise the total FreeRTOS heap space. */
149 typedef struct HeapRegion
151 uint8_t * pucStartAddress;
155 /* Used to pass information about the heap out of vPortGetHeapStats(). */
156 typedef struct xHeapStats
158 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. */
159 size_t xSizeOfLargestFreeBlockInBytes; /* The maximum size, in bytes, of all the free blocks within the heap at the time vPortGetHeapStats() is called. */
160 size_t xSizeOfSmallestFreeBlockInBytes; /* The minimum size, in bytes, of all the free blocks within the heap at the time vPortGetHeapStats() is called. */
161 size_t xNumberOfFreeBlocks; /* The number of free memory blocks within the heap at the time vPortGetHeapStats() is called. */
162 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. */
163 size_t xNumberOfSuccessfulAllocations; /* The number of calls to pvPortMalloc() that have returned a valid memory block. */
164 size_t xNumberOfSuccessfulFrees; /* The number of calls to vPortFree() that has successfully freed a block of memory. */
168 * Used to define multiple heap regions for use by heap_5.c. This function
169 * must be called before any calls to pvPortMalloc() - not creating a task,
170 * queue, semaphore, mutex, software timer, event group, etc. will result in
171 * pvPortMalloc being called.
173 * pxHeapRegions passes in an array of HeapRegion_t structures - each of which
174 * defines a region of memory that can be used as the heap. The array is
175 * terminated by a HeapRegions_t structure that has a size of 0. The region
176 * with the lowest start address must appear first in the array.
178 void vPortDefineHeapRegions( const HeapRegion_t * const pxHeapRegions ) PRIVILEGED_FUNCTION;
181 * Returns a HeapStats_t structure filled with information about the current
184 void vPortGetHeapStats( HeapStats_t * pxHeapStats );
187 * Map to the memory management routines required for the port.
189 void * pvPortMalloc( size_t xWantedSize ) PRIVILEGED_FUNCTION;
190 void * pvPortCalloc( size_t xNum,
191 size_t xSize ) PRIVILEGED_FUNCTION;
192 void vPortFree( void * pv ) PRIVILEGED_FUNCTION;
193 void vPortInitialiseBlocks( void ) PRIVILEGED_FUNCTION;
194 size_t xPortGetFreeHeapSize( void ) PRIVILEGED_FUNCTION;
195 size_t xPortGetMinimumEverFreeHeapSize( void ) PRIVILEGED_FUNCTION;
196 void xPortResetHeapMinimumEverFreeHeapSize( void ) PRIVILEGED_FUNCTION;
198 #if ( configSTACK_ALLOCATION_FROM_SEPARATE_HEAP == 1 )
199 void * pvPortMallocStack( size_t xSize ) PRIVILEGED_FUNCTION;
200 void vPortFreeStack( void * pv ) PRIVILEGED_FUNCTION;
202 #define pvPortMallocStack pvPortMalloc
203 #define vPortFreeStack vPortFree
207 * This function resets the internal state of the heap module. It must be called
208 * by the application before restarting the scheduler.
210 void vPortHeapResetState( void ) PRIVILEGED_FUNCTION;
212 #if ( configUSE_MALLOC_FAILED_HOOK == 1 )
217 * void vApplicationMallocFailedHook( void )
220 * This hook function is called when allocation failed.
222 void vApplicationMallocFailedHook( void );
226 * Setup the hardware ready for the scheduler to take control. This generally
227 * sets up a tick interrupt and sets timers for the correct tick frequency.
229 BaseType_t xPortStartScheduler( void ) PRIVILEGED_FUNCTION;
232 * Undo any hardware/ISR setup that was performed by xPortStartScheduler() so
233 * the hardware is left in its original condition after the scheduler stops
236 void vPortEndScheduler( void ) PRIVILEGED_FUNCTION;
239 * The structures and methods of manipulating the MPU are contained within the
242 * Fills the xMPUSettings structure with the memory region information
243 * contained in xRegions.
245 #if ( portUSING_MPU_WRAPPERS == 1 )
246 struct xMEMORY_REGION;
247 void vPortStoreTaskMPUSettings( xMPU_SETTINGS * xMPUSettings,
248 const struct xMEMORY_REGION * const xRegions,
249 StackType_t * pxBottomOfStack,
250 configSTACK_DEPTH_TYPE uxStackDepth ) PRIVILEGED_FUNCTION;
254 * @brief Checks if the calling task is authorized to access the given buffer.
256 * @param pvBuffer The buffer which the calling task wants to access.
257 * @param ulBufferLength The length of the pvBuffer.
258 * @param ulAccessRequested The permissions that the calling task wants.
260 * @return pdTRUE if the calling task is authorized to access the buffer,
263 #if ( portUSING_MPU_WRAPPERS == 1 )
264 BaseType_t xPortIsAuthorizedToAccessBuffer( const void * pvBuffer,
265 uint32_t ulBufferLength,
266 uint32_t ulAccessRequested ) PRIVILEGED_FUNCTION;
270 * @brief Checks if the calling task is authorized to access the given kernel object.
272 * @param lInternalIndexOfKernelObject The index of the kernel object in the kernel
273 * object handle pool.
275 * @return pdTRUE if the calling task is authorized to access the kernel object,
278 #if ( ( portUSING_MPU_WRAPPERS == 1 ) && ( configUSE_MPU_WRAPPERS_V1 == 0 ) )
280 BaseType_t xPortIsAuthorizedToAccessKernelObject( int32_t lInternalIndexOfKernelObject ) PRIVILEGED_FUNCTION;
290 #endif /* PORTABLE_H */