2 FreeRTOS.org V4.3.0 - Copyright (C) 2003-2007 Richard Barry.
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4 This file is part of the FreeRTOS.org distribution.
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6 FreeRTOS.org is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2 of the License, or
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9 (at your option) any later version.
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11 FreeRTOS.org is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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16 You should have received a copy of the GNU General Public License
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17 along with FreeRTOS.org; if not, write to the Free Software
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18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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20 A special exception to the GPL can be applied should you wish to distribute
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21 a combined work that includes FreeRTOS.org, without being obliged to provide
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22 the source code for any proprietary components. See the licensing section
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23 of http://www.FreeRTOS.org for full details of how and when the exception
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26 ***************************************************************************
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27 See http://www.FreeRTOS.org for documentation, latest information, license
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28 and contact details. Please ensure to read the configuration and relevant
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29 port sections of the online documentation.
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31 Also see http://www.SafeRTOS.com for an IEC 61508 compliant version along
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32 with commercial development and support options.
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33 ***************************************************************************
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40 /*-----------------------------------------------------------
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41 * Port specific definitions.
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43 * The settings in this file configure FreeRTOS correctly for the
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44 * given hardware and compiler.
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46 * These settings should not be altered.
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47 *-----------------------------------------------------------
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50 /* Type definitions. */
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51 #define portCHAR char
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52 #define portFLOAT float
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53 #define portDOUBLE double
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54 #define portLONG long
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55 #define portSHORT short
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56 #define portSTACK_TYPE unsigned portLONG
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57 #define portBASE_TYPE portLONG
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59 #if( configUSE_16_BIT_TICKS == 1 )
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60 typedef unsigned portSHORT portTickType;
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61 #define portMAX_DELAY ( portTickType ) 0xffff
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63 typedef unsigned portLONG portTickType;
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64 #define portMAX_DELAY ( portTickType ) 0xffffffff
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66 /*-----------------------------------------------------------*/
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68 /* Hardware specifics. */
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69 #define portSTACK_GROWTH ( -1 )
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70 #define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ )
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71 #define portBYTE_ALIGNMENT 4
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72 #define portYIELD() asm volatile ( "SWI 0" )
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73 #define portNOP() asm volatile ( "NOP" )
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74 /*-----------------------------------------------------------*/
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76 /* Critical section handling. */
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78 * The interrupt management utilities can only be called from ARM mode. When
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79 * THUMB_INTERWORK is defined the utilities are defined as functions in
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80 * portISR.c to ensure a switch to ARM mode. When THUMB_INTERWORK is not
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81 * defined then the utilities are defined as macros here - as per other ports.
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84 #ifdef THUMB_INTERWORK
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86 extern void vPortDisableInterruptsFromThumb( void ) __attribute__ ((naked));
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87 extern void vPortEnableInterruptsFromThumb( void ) __attribute__ ((naked));
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89 #define portDISABLE_INTERRUPTS() vPortDisableInterruptsFromThumb()
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90 #define portENABLE_INTERRUPTS() vPortEnableInterruptsFromThumb()
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94 #define portDISABLE_INTERRUPTS() \
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96 "STMDB SP!, {R0} \n\t" /* Push R0. */ \
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97 "MRS R0, CPSR \n\t" /* Get CPSR. */ \
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98 "ORR R0, R0, #0xC0 \n\t" /* Disable IRQ, FIQ. */ \
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99 "MSR CPSR, R0 \n\t" /* Write back modified value. */ \
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100 "LDMIA SP!, {R0} " ) /* Pop R0. */
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102 #define portENABLE_INTERRUPTS() \
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104 "STMDB SP!, {R0} \n\t" /* Push R0. */ \
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105 "MRS R0, CPSR \n\t" /* Get CPSR. */ \
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106 "BIC R0, R0, #0xC0 \n\t" /* Enable IRQ, FIQ. */ \
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107 "MSR CPSR, R0 \n\t" /* Write back modified value. */ \
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108 "LDMIA SP!, {R0} " ) /* Pop R0. */
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110 #endif /* THUMB_INTERWORK */
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112 extern void vPortEnterCritical( void );
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113 extern void vPortExitCritical( void );
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115 #define portENTER_CRITICAL() vPortEnterCritical();
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116 #define portEXIT_CRITICAL() vPortExitCritical();
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117 /*-----------------------------------------------------------*/
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119 /* Task utilities. */
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120 #define portEND_SWITCHING_ISR( xSwitchRequired ) \
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122 extern void vTaskSwitchContext( void ); \
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124 if( xSwitchRequired ) \
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126 vTaskSwitchContext(); \
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129 /*-----------------------------------------------------------*/
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131 /* Compiler specifics */
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134 /* Task function macros as described on the FreeRTOS.org WEB site. */
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135 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void * pvParameters )
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136 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void * pvParameters )
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138 #endif /* PORTMACRO_H */
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