2 FreeRTOS V9.0.0 - Copyright (C) 2016 Real Time Engineers Ltd.
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5 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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7 This file is part of the FreeRTOS distribution.
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9 FreeRTOS is free software; you can redistribute it and/or modify it under
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10 the terms of the GNU General Public License (version 2) as published by the
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11 Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
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13 ***************************************************************************
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14 >>! NOTE: The modification to the GPL is included to allow you to !<<
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15 >>! distribute a combined work that includes FreeRTOS without being !<<
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16 >>! obliged to provide the source code for proprietary components !<<
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17 >>! outside of the FreeRTOS kernel. !<<
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18 ***************************************************************************
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20 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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21 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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22 FOR A PARTICULAR PURPOSE. Full license text is available on the following
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23 link: http://www.freertos.org/a00114.html
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25 ***************************************************************************
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27 * FreeRTOS provides completely free yet professionally developed, *
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28 * robust, strictly quality controlled, supported, and cross *
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29 * platform software that is more than just the market leader, it *
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30 * is the industry's de facto standard. *
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32 * Help yourself get started quickly while simultaneously helping *
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33 * to support the FreeRTOS project by purchasing a FreeRTOS *
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34 * tutorial book, reference manual, or both: *
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35 * http://www.FreeRTOS.org/Documentation *
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37 ***************************************************************************
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39 http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
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40 the FAQ page "My application does not run, what could be wrong?". Have you
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41 defined configASSERT()?
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43 http://www.FreeRTOS.org/support - In return for receiving this top quality
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44 embedded software for free we request you assist our global community by
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45 participating in the support forum.
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47 http://www.FreeRTOS.org/training - Investing in training allows your team to
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48 be as productive as possible as early as possible. Now you can receive
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49 FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
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50 Ltd, and the world's leading authority on the world's leading RTOS.
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52 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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53 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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54 compatible FAT file system, and our tiny thread aware UDP/IP stack.
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56 http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
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57 Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
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59 http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
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60 Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
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61 licenses offer ticketed support, indemnification and commercial middleware.
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63 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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64 engineered and independently SIL3 certified version for use in safety and
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65 mission critical applications that require provable dependability.
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78 /*-----------------------------------------------------------
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79 * Port specific definitions.
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81 * The settings in this file configure FreeRTOS correctly for the
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82 * given hardware and compiler.
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84 * These settings should not be altered.
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85 *-----------------------------------------------------------
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88 /* Type definitions. */
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89 #define portCHAR char
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90 #define portFLOAT float
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91 #define portDOUBLE double
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92 #define portLONG long
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93 #define portSHORT short
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94 #define portSTACK_TYPE uint32_t
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95 #define portBASE_TYPE long
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97 typedef portSTACK_TYPE StackType_t;
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98 typedef long BaseType_t;
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99 typedef unsigned long UBaseType_t;
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101 #if( configUSE_16_BIT_TICKS == 1 )
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102 typedef uint16_t TickType_t;
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103 #define portMAX_DELAY ( TickType_t ) 0xffff
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105 typedef uint32_t TickType_t;
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106 #define portMAX_DELAY ( TickType_t ) 0xffffffffUL
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108 /* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
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109 not need to be guarded with a critical section. */
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110 #define portTICK_TYPE_IS_ATOMIC 1
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112 /*-----------------------------------------------------------*/
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114 /* Architecture specifics. */
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115 #define portSTACK_GROWTH ( -1 )
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116 #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
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117 #define portBYTE_ALIGNMENT 8
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118 /*-----------------------------------------------------------*/
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120 /* Scheduler utilities. */
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121 #define portYIELD() \
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123 /* Set a PendSV to request a context switch. */ \
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124 portNVIC_INT_CTRL_REG = portNVIC_PENDSVSET_BIT; \
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126 /* Barriers are normally not required but do ensure the code is completely \
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127 within the specified behaviour for the architecture. */ \
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128 __asm volatile( "dsb" ); \
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129 __asm volatile( "isb" ); \
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132 #define portNVIC_INT_CTRL_REG ( * ( ( volatile uint32_t * ) 0xe000ed04 ) )
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133 #define portNVIC_PENDSVSET_BIT ( 1UL << 28UL )
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134 #define portEND_SWITCHING_ISR( xSwitchRequired ) if( xSwitchRequired != pdFALSE ) portYIELD()
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135 #define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
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136 /*-----------------------------------------------------------*/
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138 /* Critical section management. */
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139 extern void vPortEnterCritical( void );
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140 extern void vPortExitCritical( void );
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141 #define portSET_INTERRUPT_MASK_FROM_ISR() ulPortRaiseBASEPRI()
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142 #define portCLEAR_INTERRUPT_MASK_FROM_ISR(x) vPortSetBASEPRI(x)
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143 #define portDISABLE_INTERRUPTS() vPortRaiseBASEPRI()
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144 #define portENABLE_INTERRUPTS() vPortSetBASEPRI(0)
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145 #define portENTER_CRITICAL() vPortEnterCritical()
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146 #define portEXIT_CRITICAL() vPortExitCritical()
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148 /*-----------------------------------------------------------*/
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150 /* Task function macros as described on the FreeRTOS.org WEB site. These are
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151 not necessary for to use this port. They are defined so the common demo files
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152 (which build with all the ports) will build. */
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153 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
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154 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
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155 /*-----------------------------------------------------------*/
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157 /* Tickless idle/low power functionality. */
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158 #ifndef portSUPPRESS_TICKS_AND_SLEEP
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159 extern void vPortSuppressTicksAndSleep( TickType_t xExpectedIdleTime );
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160 #define portSUPPRESS_TICKS_AND_SLEEP( xExpectedIdleTime ) vPortSuppressTicksAndSleep( xExpectedIdleTime )
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162 /*-----------------------------------------------------------*/
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164 /* Architecture specific optimisations. */
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165 #ifndef configUSE_PORT_OPTIMISED_TASK_SELECTION
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166 #define configUSE_PORT_OPTIMISED_TASK_SELECTION 1
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169 #if configUSE_PORT_OPTIMISED_TASK_SELECTION == 1
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171 /* Generic helper function. */
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172 __attribute__( ( always_inline ) ) static inline uint8_t ucPortCountLeadingZeros( uint32_t ulBitmap )
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176 __asm volatile ( "clz %0, %1" : "=r" ( ucReturn ) : "r" ( ulBitmap ) );
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180 /* Check the configuration. */
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181 #if( configMAX_PRIORITIES > 32 )
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182 #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.
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185 /* Store/clear the ready priorities in a bit map. */
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186 #define portRECORD_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) |= ( 1UL << ( uxPriority ) )
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187 #define portRESET_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) &= ~( 1UL << ( uxPriority ) )
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189 /*-----------------------------------------------------------*/
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191 #define portGET_HIGHEST_PRIORITY( uxTopPriority, uxReadyPriorities ) uxTopPriority = ( 31UL - ( uint32_t ) ucPortCountLeadingZeros( ( uxReadyPriorities ) ) )
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193 #endif /* configUSE_PORT_OPTIMISED_TASK_SELECTION */
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195 /*-----------------------------------------------------------*/
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197 #ifdef configASSERT
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198 void vPortValidateInterruptPriority( void );
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199 #define portASSERT_IF_INTERRUPT_PRIORITY_INVALID() vPortValidateInterruptPriority()
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202 /* portNOP() is not required by this port. */
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205 #define portINLINE __inline
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207 #ifndef portFORCE_INLINE
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208 #define portFORCE_INLINE inline __attribute__(( always_inline))
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211 portFORCE_INLINE static BaseType_t xPortIsInsideInterrupt( void )
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213 uint32_t ulCurrentInterrupt;
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214 BaseType_t xReturn;
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216 /* Obtain the number of the currently executing interrupt. */
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217 __asm volatile( "mrs %0, ipsr" : "=r"( ulCurrentInterrupt ) );
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219 if( ulCurrentInterrupt == 0 )
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231 /*-----------------------------------------------------------*/
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233 portFORCE_INLINE static void vPortRaiseBASEPRI( void )
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235 uint32_t ulNewBASEPRI;
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241 " msr basepri, %0 \n" \
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245 :"=r" (ulNewBASEPRI) : "i" ( configMAX_SYSCALL_INTERRUPT_PRIORITY )
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249 /*-----------------------------------------------------------*/
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251 portFORCE_INLINE static uint32_t ulPortRaiseBASEPRI( void )
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253 uint32_t ulOriginalBASEPRI, ulNewBASEPRI;
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257 " mrs %0, basepri \n" \
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260 " msr basepri, %1 \n" \
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264 :"=r" (ulOriginalBASEPRI), "=r" (ulNewBASEPRI) : "i" ( configMAX_SYSCALL_INTERRUPT_PRIORITY )
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267 /* This return will not be reached but is necessary to prevent compiler
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269 return ulOriginalBASEPRI;
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271 /*-----------------------------------------------------------*/
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273 portFORCE_INLINE static void vPortSetBASEPRI( uint32_t ulNewMaskValue )
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277 " msr basepri, %0 " :: "r" ( ulNewMaskValue )
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280 /*-----------------------------------------------------------*/
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287 #endif /* PORTMACRO_H */
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