portmacro.h 5.5 KB

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  1. /*
  2. * FreeRTOS Kernel <DEVELOPMENT BRANCH>
  3. * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
  4. *
  5. * SPDX-License-Identifier: MIT
  6. *
  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:
  13. *
  14. * The above copyright notice and this permission notice shall be included in all
  15. * copies or substantial portions of the Software.
  16. *
  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.
  23. *
  24. * https://www.FreeRTOS.org
  25. * https://github.com/FreeRTOS
  26. *
  27. */
  28. #ifndef PORTMACRO_H
  29. #define PORTMACRO_H
  30. /* *INDENT-OFF* */
  31. #ifdef __cplusplus
  32. extern "C" {
  33. #endif
  34. /* *INDENT-ON* */
  35. /*-----------------------------------------------------------
  36. * Port specific definitions.
  37. *
  38. * The settings in this file configure FreeRTOS correctly for the
  39. * given hardware and compiler.
  40. *
  41. * These settings should not be altered.
  42. *-----------------------------------------------------------
  43. */
  44. /* Type definitions. */
  45. #define portCHAR char
  46. #define portFLOAT float
  47. #define portDOUBLE double
  48. #define portLONG long
  49. #define portSHORT short
  50. #define portSTACK_TYPE uint8_t
  51. #define portBASE_TYPE char
  52. typedef portSTACK_TYPE StackType_t;
  53. typedef signed char BaseType_t;
  54. typedef unsigned char UBaseType_t;
  55. #if ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_16_BITS )
  56. typedef uint16_t TickType_t;
  57. #define portMAX_DELAY ( TickType_t ) 0xffff
  58. #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
  59. typedef uint32_t TickType_t;
  60. #define portMAX_DELAY ( TickType_t ) ( 0xFFFFFFFFUL )
  61. #else
  62. #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
  63. #endif
  64. /*-----------------------------------------------------------*/
  65. /* Hardware specifics. */
  66. #define portBYTE_ALIGNMENT 2
  67. #define portSTACK_GROWTH ( -1 )
  68. #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
  69. #define portYIELD() asm volatile ( "TRAPA #0" )
  70. #define portNOP() asm volatile ( "NOP" )
  71. /*-----------------------------------------------------------*/
  72. /* Critical section handling. */
  73. #define portENABLE_INTERRUPTS() asm volatile ( "ANDC #0x7F, CCR" );
  74. #define portDISABLE_INTERRUPTS() asm volatile ( "ORC #0x80, CCR" );
  75. /* Push the CCR then disable interrupts. */
  76. #define portENTER_CRITICAL() \
  77. asm volatile ( "STC CCR, @-ER7" ); \
  78. portDISABLE_INTERRUPTS();
  79. /* Pop the CCR to set the interrupt masking back to its previous state. */
  80. #define portEXIT_CRITICAL() asm volatile ( "LDC @ER7+, CCR" );
  81. /*-----------------------------------------------------------*/
  82. /* Task utilities. */
  83. /* Context switch macros. These macros are very simple as the context
  84. * is saved simply by selecting the saveall attribute of the context switch
  85. * interrupt service routines. These macros save and restore the stack
  86. * pointer to the TCB. */
  87. #define portSAVE_STACK_POINTER() \
  88. extern void * pxCurrentTCB; \
  89. \
  90. asm volatile ( \
  91. "MOV.L @_pxCurrentTCB, ER5 \n\t" \
  92. "MOV.L ER7, @ER5 \n\t" \
  93. ); \
  94. ( void ) pxCurrentTCB;
  95. #define portRESTORE_STACK_POINTER() \
  96. extern void * pxCurrentTCB; \
  97. \
  98. asm volatile ( \
  99. "MOV.L @_pxCurrentTCB, ER5 \n\t" \
  100. "MOV.L @ER5, ER7 \n\t" \
  101. ); \
  102. ( void ) pxCurrentTCB;
  103. /*-----------------------------------------------------------*/
  104. /* Macros to allow a context switch from within an application ISR. */
  105. #define portENTER_SWITCHING_ISR() portSAVE_STACK_POINTER(); {
  106. #define portEXIT_SWITCHING_ISR( x ) \
  107. if( x ) \
  108. { \
  109. extern void vTaskSwitchContext( void ); \
  110. vTaskSwitchContext(); \
  111. } \
  112. } \
  113. portRESTORE_STACK_POINTER();
  114. /*-----------------------------------------------------------*/
  115. /* Task function macros as described on the FreeRTOS.org WEB site. */
  116. #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void * pvParameters )
  117. #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void * pvParameters )
  118. /* *INDENT-OFF* */
  119. #ifdef __cplusplus
  120. }
  121. #endif
  122. /* *INDENT-ON* */
  123. #endif /* PORTMACRO_H */