git.sur5r.net Git - freertos/blob - FreeRTOS/Source/portable/MPLAB/PIC32MX/portmacro.h

   1 /*\r
   2     FreeRTOS V7.5.3 - Copyright (C) 2013 Real Time Engineers Ltd. \r
   3     All rights reserved\r
   4 \r
   5     VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.\r
   6 \r
   7     ***************************************************************************\r
   8      *                                                                       *\r
   9      *    FreeRTOS provides completely free yet professionally developed,    *\r
  10      *    robust, strictly quality controlled, supported, and cross          *\r
  11      *    platform software that has become a de facto standard.             *\r
  12      *                                                                       *\r
  13      *    Help yourself get started quickly and support the FreeRTOS         *\r
  14      *    project by purchasing a FreeRTOS tutorial book, reference          *\r
  15      *    manual, or both from: http://www.FreeRTOS.org/Documentation        *\r
  16      *                                                                       *\r
  17      *    Thank you!                                                         *\r
  18      *                                                                       *\r
  19     ***************************************************************************\r
  20 \r
  21     This file is part of the FreeRTOS distribution.\r
  22 \r
  23     FreeRTOS is free software; you can redistribute it and/or modify it under\r
  24     the terms of the GNU General Public License (version 2) as published by the\r
  25     Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.\r
  26 \r
  27     >>! NOTE: The modification to the GPL is included to allow you to distribute\r
  28     >>! a combined work that includes FreeRTOS without being obliged to provide\r
  29     >>! the source code for proprietary components outside of the FreeRTOS\r
  30     >>! kernel.\r
  31 \r
  32     FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY\r
  33     WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\r
  34     FOR A PARTICULAR PURPOSE.  Full license text is available from the following\r
  35     link: http://www.freertos.org/a00114.html\r
  36 \r
  37     1 tab == 4 spaces!\r
  38 \r
  39     ***************************************************************************\r
  40      *                                                                       *\r
  41      *    Having a problem?  Start by reading the FAQ "My application does   *\r
  42      *    not run, what could be wrong?"                                     *\r
  43      *                                                                       *\r
  44      *    http://www.FreeRTOS.org/FAQHelp.html                               *\r
  45      *                                                                       *\r
  46     ***************************************************************************\r
  47 \r
  48     http://www.FreeRTOS.org - Documentation, books, training, latest versions,\r
  49     license and Real Time Engineers Ltd. contact details.\r
  50 \r
  51     http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,\r
  52     including FreeRTOS+Trace - an indispensable productivity tool, a DOS\r
  53     compatible FAT file system, and our tiny thread aware UDP/IP stack.\r
  54 \r
  55     http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High\r
  56     Integrity Systems to sell under the OpenRTOS brand.  Low cost OpenRTOS\r
  57     licenses offer ticketed support, indemnification and middleware.\r
  58 \r
  59     http://www.SafeRTOS.com - High Integrity Systems also provide a safety\r
  60     engineered and independently SIL3 certified version for use in safety and\r
  61     mission critical applications that require provable dependability.\r
  62 \r
  63     1 tab == 4 spaces!\r
  64 */\r
  65 \r
  66 #ifndef PORTMACRO_H\r
  67 #define PORTMACRO_H\r
  68 \r
  69 /* System include files */\r
  70 #include <xc.h>\r
  71 \r
  72 #ifdef __cplusplus\r
  73 extern "C" {\r
  74 #endif\r
  75 \r
  76 /*-----------------------------------------------------------\r
  77  * Port specific definitions.\r
  78  *\r
  79  * The settings in this file configure FreeRTOS correctly for the\r
  80  * given hardware and compiler.\r
  81  *\r
  82  * These settings should not be altered.\r
  83  *-----------------------------------------------------------\r
  84  */\r
  85 \r
  86 /* Type definitions. */\r
  87 #define portCHAR                char\r
  88 #define portFLOAT               float\r
  89 #define portDOUBLE              double\r
  90 #define portLONG                long\r
  91 #define portSHORT               short\r
  92 #define portSTACK_TYPE  unsigned long\r
  93 #define portBASE_TYPE   long\r
  94 \r
  95 #if( configUSE_16_BIT_TICKS == 1 )\r
  96         typedef unsigned portSHORT portTickType;\r
  97         #define portMAX_DELAY ( portTickType ) 0xffff\r
  98 #else\r
  99         typedef unsigned long portTickType;\r
 100         #define portMAX_DELAY ( portTickType ) 0xffffffff\r
 101 #endif\r
 102 /*-----------------------------------------------------------*/\r
 103 \r
 104 /* Hardware specifics. */\r
 105 #define portBYTE_ALIGNMENT                      8\r
 106 #define portSTACK_GROWTH                        -1\r
 107 #define portTICK_RATE_MS                        ( ( portTickType ) 1000 / configTICK_RATE_HZ )\r
 108 /*-----------------------------------------------------------*/\r
 109 \r
 110 /* Critical section management. */\r
 111 #define portIPL_SHIFT                           ( 10UL )\r
 112 #define portALL_IPL_BITS                        ( 0x3fUL << portIPL_SHIFT )\r
 113 #define portSW0_BIT                                     ( 0x01 << 8 )\r
 114 \r
 115 /* This clears the IPL bits, then sets them to\r
 116 configMAX_SYSCALL_INTERRUPT_PRIORITY.  An extra check is performed if\r
 117 configASSERT() is defined to ensure an assertion handler does not inadvertently\r
 118 attempt to lower the IPL when the call to assert was triggered because the IPL\r
 119 value was found to be above configMAX_SYSCALL_INTERRUPT_PRIORITY when an ISR\r
 120 safe FreeRTOS API function was executed.  ISR safe FreeRTOS API functions are\r
 121 those that end in FromISR.  FreeRTOS maintains a separate interrupt API to\r
 122 ensure API function and interrupt entry is as fast and as simple as possible. */\r
 123 #ifdef configASSERT\r
 124         #define portDISABLE_INTERRUPTS()                                                                                        \\r
 125         {                                                                                                                                                       \\r
 126         unsigned long ulStatus;                                                                                                         \\r
 127                                                                                                                                                                 \\r
 128                 /* Mask interrupts at and below the kernel interrupt priority. */               \\r
 129                 ulStatus = _CP0_GET_STATUS();                                                                                   \\r
 130                                                                                                                                                                 \\r
 131                 /* Is the current IPL below configMAX_SYSCALL_INTERRUPT_PRIORITY? */    \\r
 132                 if( ( ( ulStatus & portALL_IPL_BITS ) >> portIPL_SHIFT ) < configMAX_SYSCALL_INTERRUPT_PRIORITY ) \\r
 133                 {                                                                                                                                               \\r
 134                         ulStatus &= ~portALL_IPL_BITS;                                                                          \\r
 135                         _CP0_SET_STATUS( ( ulStatus | ( configMAX_SYSCALL_INTERRUPT_PRIORITY << portIPL_SHIFT ) ) ); \\r
 136                 }                                                                                                                                               \\r
 137         }\r
 138 #else /* configASSERT */\r
 139         #define portDISABLE_INTERRUPTS()                                                                                \\r
 140         {                                                                                                                                               \\r
 141         unsigned long ulStatus;                                                                                                 \\r
 142                                                                                                                                                         \\r
 143                 /* Mask interrupts at and below the kernel interrupt priority. */       \\r
 144                 ulStatus = _CP0_GET_STATUS();                                                                           \\r
 145                 ulStatus &= ~portALL_IPL_BITS;                                                                          \\r
 146                 _CP0_SET_STATUS( ( ulStatus | ( configMAX_SYSCALL_INTERRUPT_PRIORITY << portIPL_SHIFT ) ) ); \\r
 147         }\r
 148 #endif /* configASSERT */\r
 149 \r
 150 #define portENABLE_INTERRUPTS()                                                                                 \\r
 151 {                                                                                                                                               \\r
 152 unsigned long ulStatus;                                                                                                 \\r
 153                                                                                                                                                 \\r
 154         /* Unmask all interrupts. */                                                                            \\r
 155         ulStatus = _CP0_GET_STATUS();                                                                           \\r
 156         ulStatus &= ~portALL_IPL_BITS;                                                                          \\r
 157         _CP0_SET_STATUS( ulStatus );                                                                            \\r
 158 }\r
 159 \r
 160 \r
 161 extern void vTaskEnterCritical( void );\r
 162 extern void vTaskExitCritical( void );\r
 163 #define portCRITICAL_NESTING_IN_TCB     1\r
 164 #define portENTER_CRITICAL()            vTaskEnterCritical()\r
 165 #define portEXIT_CRITICAL()                     vTaskExitCritical()\r
 166 \r
 167 extern unsigned portBASE_TYPE uxPortSetInterruptMaskFromISR();\r
 168 extern void vPortClearInterruptMaskFromISR( unsigned portBASE_TYPE );\r
 169 #define portSET_INTERRUPT_MASK_FROM_ISR() uxPortSetInterruptMaskFromISR()\r
 170 #define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedStatusRegister ) vPortClearInterruptMaskFromISR( uxSavedStatusRegister )\r
 171 \r
 172 #if configUSE_PORT_OPTIMISED_TASK_SELECTION == 1\r
 173 \r
 174         /* Check the configuration. */\r
 175         #if( configMAX_PRIORITIES > 32 )\r
 176                 #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.\r
 177         #endif\r
 178 \r
 179         /* Store/clear the ready priorities in a bit map. */\r
 180         #define portRECORD_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) |= ( 1UL << ( uxPriority ) )\r
 181         #define portRESET_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) &= ~( 1UL << ( uxPriority ) )\r
 182 \r
 183         /*-----------------------------------------------------------*/\r
 184 \r
 185         #define portGET_HIGHEST_PRIORITY( uxTopPriority, uxReadyPriorities ) uxTopPriority = ( 31 - _clz( ( uxReadyPriorities ) ) )\r
 186 \r
 187 #endif /* taskRECORD_READY_PRIORITY */\r
 188 \r
 189 /*-----------------------------------------------------------*/\r
 190 \r
 191 /* Task utilities. */\r
 192 \r
 193 #define portYIELD()                                                             \\r
 194 {                                                                                               \\r
 195 unsigned long ulCause;                                                  \\r
 196                                                                                                 \\r
 197         /* Trigger software interrupt. */                       \\r
 198         ulCause = _CP0_GET_CAUSE();                                     \\r
 199         ulCause |= portSW0_BIT;                                         \\r
 200         _CP0_SET_CAUSE( ulCause );                                      \\r
 201 }\r
 202 \r
 203 #define portCURRENT_INTERRUPT_PRIORITY ( ( _CP0_GET_STATUS() & portALL_IPL_BITS ) >> portIPL_SHIFT )\r
 204 #define portASSERT_IF_INTERRUPT_PRIORITY_INVALID() configASSERT( portCURRENT_INTERRUPT_PRIORITY <= configMAX_SYSCALL_INTERRUPT_PRIORITY )\r
 205 \r
 206 #define portNOP()       __asm volatile ( "nop" )\r
 207 \r
 208 /*-----------------------------------------------------------*/\r
 209 \r
 210 /* Task function macros as described on the FreeRTOS.org WEB site. */\r
 211 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters ) __attribute__((noreturn))\r
 212 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )\r
 213 /*-----------------------------------------------------------*/\r
 214 \r
 215 #define portEND_SWITCHING_ISR( xSwitchRequired )        if( xSwitchRequired )   \\r
 216                                                                                                         {                                               \\r
 217                                                                                                                 portYIELD();            \\r
 218                                                                                                         }\r
 219 \r
 220 /* Required by the kernel aware debugger. */\r
 221 #ifdef __DEBUG\r
 222         #define portREMOVE_STATIC_QUALIFIER\r
 223 #endif\r
 224 \r
 225 #ifdef __cplusplus\r
 226 }\r
 227 #endif\r
 228 \r
 229 #endif /* PORTMACRO_H */\r
 230 \r