git.sur5r.net Git - freertos/blob - Source/portable/GCC/STR75x/portmacro.h

   1 /*\r
   2     FreeRTOS V6.0.4 - Copyright (C) 2010 Real Time Engineers Ltd.\r
   3 \r
   4     ***************************************************************************\r
   5     *                                                                         *\r
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  13     * then take a look at the FreeRTOS eBook                                  *\r
  14     *                                                                         *\r
  15     *        "Using the FreeRTOS Real Time Kernel - a Practical Guide"        *\r
  16     *                  http://www.FreeRTOS.org/Documentation                  *\r
  17     *                                                                         *\r
  18     * A pdf reference manual is also available.  Both are usually delivered   *\r
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  22     *                                                                         *\r
  23     ***************************************************************************\r
  24 \r
  25     This file is part of the FreeRTOS distribution.\r
  26 \r
  27     FreeRTOS is free software; you can redistribute it and/or modify it under\r
  28     the terms of the GNU General Public License (version 2) as published by the\r
  29     Free Software Foundation AND MODIFIED BY the FreeRTOS exception.\r
  30     ***NOTE*** The exception to the GPL is included to allow you to distribute\r
  31     a combined work that includes FreeRTOS without being obliged to provide the\r
  32     source code for proprietary components outside of the FreeRTOS kernel.\r
  33     FreeRTOS is distributed in the hope that it will be useful, but WITHOUT\r
  34     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or\r
  35     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for\r
  36     more details. You should have received a copy of the GNU General Public \r
  37     License and the FreeRTOS license exception along with FreeRTOS; if not it \r
  38     can be viewed here: http://www.freertos.org/a00114.html and also obtained \r
  39     by writing to Richard Barry, contact details for whom are available on the\r
  40     FreeRTOS WEB site.\r
  41 \r
  42     1 tab == 4 spaces!\r
  43 \r
  44     http://www.FreeRTOS.org - Documentation, latest information, license and\r
  45     contact details.\r
  46 \r
  47     http://www.SafeRTOS.com - A version that is certified for use in safety\r
  48     critical systems.\r
  49 \r
  50     http://www.OpenRTOS.com - Commercial support, development, porting,\r
  51     licensing and training services.\r
  52 */\r
  53 \r
  54 \r
  55 #ifndef PORTMACRO_H\r
  56 #define PORTMACRO_H\r
  57 \r
  58 #ifdef __cplusplus\r
  59 extern "C" {\r
  60 #endif\r
  61 \r
  62 /*-----------------------------------------------------------\r
  63  * Port specific definitions.\r
  64  *\r
  65  * The settings in this file configure FreeRTOS correctly for the\r
  66  * given hardware and compiler.\r
  67  *\r
  68  * These settings should not be altered.\r
  69  *-----------------------------------------------------------\r
  70  */\r
  71 \r
  72 /* Type definitions. */\r
  73 #define portCHAR                char\r
  74 #define portFLOAT               float\r
  75 #define portDOUBLE              double\r
  76 #define portLONG                long\r
  77 #define portSHORT               short\r
  78 #define portSTACK_TYPE  unsigned portLONG\r
  79 #define portBASE_TYPE   portLONG\r
  80 \r
  81 #if( configUSE_16_BIT_TICKS == 1 )\r
  82         typedef unsigned portSHORT portTickType;\r
  83         #define portMAX_DELAY ( portTickType ) 0xffff\r
  84 #else\r
  85         typedef unsigned portLONG portTickType;\r
  86         #define portMAX_DELAY ( portTickType ) 0xffffffff\r
  87 #endif\r
  88 /*-----------------------------------------------------------*/ \r
  89 \r
  90 /* Hardware specifics. */\r
  91 #define portSTACK_GROWTH                        ( -1 )\r
  92 #define portTICK_RATE_MS                        ( ( portTickType ) 1000 / configTICK_RATE_HZ )          \r
  93 #define portBYTE_ALIGNMENT                      8\r
  94 #define portYIELD()                                     asm volatile ( "SWI 0" )\r
  95 #define portNOP()                                       asm volatile ( "NOP" )\r
  96 /*-----------------------------------------------------------*/ \r
  97 \r
  98 /* Critical section handling. */\r
  99 /*\r
 100  * The interrupt management utilities can only be called from ARM mode.  When\r
 101  * THUMB_INTERWORK is defined the utilities are defined as functions in \r
 102  * portISR.c to ensure a switch to ARM mode.  When THUMB_INTERWORK is not \r
 103  * defined then the utilities are defined as macros here - as per other ports.\r
 104  */\r
 105 \r
 106 #ifdef THUMB_INTERWORK\r
 107 \r
 108         extern void vPortDisableInterruptsFromThumb( void ) __attribute__ ((naked));\r
 109         extern void vPortEnableInterruptsFromThumb( void ) __attribute__ ((naked));\r
 110 \r
 111         #define portDISABLE_INTERRUPTS()        vPortDisableInterruptsFromThumb()\r
 112         #define portENABLE_INTERRUPTS()         vPortEnableInterruptsFromThumb()\r
 113         \r
 114 #else\r
 115 \r
 116         #define portDISABLE_INTERRUPTS()                                                                                        \\r
 117                 asm volatile (                                                                                                                  \\r
 118                         "STMDB  SP!, {R0}               \n\t"   /* Push R0.                                             */      \\r
 119                         "MRS    R0, CPSR                \n\t"   /* Get CPSR.                                    */      \\r
 120                         "ORR    R0, R0, #0xC0   \n\t"   /* Disable IRQ, FIQ.                    */      \\r
 121                         "MSR    CPSR, R0                \n\t"   /* Write back modified value.   */      \\r
 122                         "LDMIA  SP!, {R0}                       " )     /* Pop R0.                                              */\r
 123                         \r
 124         #define portENABLE_INTERRUPTS()                                                                                         \\r
 125                 asm volatile (                                                                                                                  \\r
 126                         "STMDB  SP!, {R0}               \n\t"   /* Push R0.                                             */      \\r
 127                         "MRS    R0, CPSR                \n\t"   /* Get CPSR.                                    */      \\r
 128                         "BIC    R0, R0, #0xC0   \n\t"   /* Enable IRQ, FIQ.                             */      \\r
 129                         "MSR    CPSR, R0                \n\t"   /* Write back modified value.   */      \\r
 130                         "LDMIA  SP!, {R0}                       " )     /* Pop R0.                                              */\r
 131 \r
 132 #endif /* THUMB_INTERWORK */\r
 133 \r
 134 extern void vPortEnterCritical( void );\r
 135 extern void vPortExitCritical( void );\r
 136 \r
 137 #define portENTER_CRITICAL()            vPortEnterCritical();\r
 138 #define portEXIT_CRITICAL()                     vPortExitCritical();\r
 139 /*-----------------------------------------------------------*/ \r
 140 \r
 141 /* Task utilities. */\r
 142 #define portEND_SWITCHING_ISR( xSwitchRequired )        \\r
 143 {                                                                                                       \\r
 144 extern void vTaskSwitchContext( void );                         \\r
 145                                                                                                         \\r
 146         if( xSwitchRequired )                                                   \\r
 147         {                                                                                               \\r
 148                 vTaskSwitchContext();                                           \\r
 149         }                                                                                               \\r
 150 }\r
 151 /*-----------------------------------------------------------*/ \r
 152 \r
 153 /* Task function macros as described on the FreeRTOS.org WEB site. */\r
 154 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void * pvParameters )\r
 155 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void * pvParameters )\r
 156 \r
 157 #ifdef __cplusplus\r
 158 }\r
 159 #endif\r
 160 \r
 161 #endif /* PORTMACRO_H */\r
 162 \r
 163 \r