2 FreeRTOS V7.4.2 - Copyright (C) 2013 Real Time Engineers Ltd.
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4 FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME. PLEASE VISIT
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5 http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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7 ***************************************************************************
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9 * FreeRTOS tutorial books are available in pdf and paperback. *
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10 * Complete, revised, and edited pdf reference manuals are also *
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13 * Purchasing FreeRTOS documentation will not only help you, by *
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14 * ensuring you get running as quickly as possible and with an *
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15 * in-depth knowledge of how to use FreeRTOS, it will also help *
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16 * the FreeRTOS project to continue with its mission of providing *
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17 * professional grade, cross platform, de facto standard solutions *
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18 * for microcontrollers - completely free of charge! *
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20 * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
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22 * Thank you for using FreeRTOS, and thank you for your support! *
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24 ***************************************************************************
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27 This file is part of the FreeRTOS distribution.
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29 FreeRTOS is free software; you can redistribute it and/or modify it under
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30 the terms of the GNU General Public License (version 2) as published by the
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31 Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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33 >>>>>>NOTE<<<<<< The modification to the GPL is included to allow you to
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34 distribute a combined work that includes FreeRTOS without being obliged to
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35 provide the source code for proprietary components outside of the FreeRTOS
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38 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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39 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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40 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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41 details. You should have received a copy of the GNU General Public License
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42 and the FreeRTOS license exception along with FreeRTOS; if not it can be
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43 viewed here: http://www.freertos.org/a00114.html and also obtained by
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44 writing to Real Time Engineers Ltd., contact details for whom are available
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45 on the FreeRTOS WEB site.
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49 ***************************************************************************
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51 * Having a problem? Start by reading the FAQ "My application does *
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52 * not run, what could be wrong?" *
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54 * http://www.FreeRTOS.org/FAQHelp.html *
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56 ***************************************************************************
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59 http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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60 license and Real Time Engineers Ltd. contact details.
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62 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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63 including FreeRTOS+Trace - an indispensable productivity tool, and our new
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64 fully thread aware and reentrant UDP/IP stack.
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66 http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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67 Integrity Systems, who sell the code with commercial support,
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68 indemnification and middleware, under the OpenRTOS brand.
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70 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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71 engineered and independently SIL3 certified version for use in safety and
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72 mission critical applications that require provable dependability.
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83 #include <mb_interface.h>
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84 #include <xparameters.h>
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86 /*-----------------------------------------------------------
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87 * Port specific definitions.
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89 * The settings in this file configure FreeRTOS correctly for the
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90 * given hardware and compiler.
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92 * These settings should not be altered.
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93 *-----------------------------------------------------------
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96 /* Type definitions. */
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97 #define portCHAR char
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98 #define portFLOAT float
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99 #define portDOUBLE double
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100 #define portLONG long
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101 #define portSHORT short
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102 #define portSTACK_TYPE unsigned long
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103 #define portBASE_TYPE long
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105 #if( configUSE_16_BIT_TICKS == 1 )
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106 typedef unsigned portSHORT portTickType;
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107 #define portMAX_DELAY ( portTickType ) 0xffff
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109 typedef unsigned portLONG portTickType;
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110 #define portMAX_DELAY ( portTickType ) 0xffffffff
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112 /*-----------------------------------------------------------*/
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114 /* Interrupt control macros and functions. */
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115 void microblaze_disable_interrupts( void );
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116 void microblaze_enable_interrupts( void );
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117 #define portDISABLE_INTERRUPTS() microblaze_disable_interrupts()
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118 #define portENABLE_INTERRUPTS() microblaze_enable_interrupts()
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120 /*-----------------------------------------------------------*/
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122 /* Critical section macros. */
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123 void vPortEnterCritical( void );
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124 void vPortExitCritical( void );
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125 #define portENTER_CRITICAL() { \
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126 extern volatile unsigned portBASE_TYPE uxCriticalNesting; \
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127 microblaze_disable_interrupts(); \
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128 uxCriticalNesting++; \
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131 #define portEXIT_CRITICAL() { \
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132 extern volatile unsigned portBASE_TYPE uxCriticalNesting; \
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133 /* Interrupts are disabled, so we can */ \
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134 /* access the variable directly. */ \
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135 uxCriticalNesting--; \
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136 if( uxCriticalNesting == 0 ) \
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138 /* The nesting has unwound and we \
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139 can enable interrupts again. */ \
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140 portENABLE_INTERRUPTS(); \
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144 /*-----------------------------------------------------------*/
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146 /* The yield macro maps directly to the vPortYield() function. */
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147 void vPortYield( void );
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148 #define portYIELD() vPortYield()
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150 /* portYIELD_FROM_ISR() does not directly call vTaskSwitchContext(), but instead
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151 sets a flag to say that a yield has been requested. The interrupt exit code
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152 then checks this flag, and calls vTaskSwitchContext() before restoring a task
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153 context, if the flag is not false. This is done to prevent multiple calls to
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154 vTaskSwitchContext() being made from a single interrupt, as a single interrupt
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155 can result in multiple peripherals being serviced. */
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156 extern volatile unsigned long ulTaskSwitchRequested;
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157 #define portYIELD_FROM_ISR( x ) if( x != pdFALSE ) ulTaskSwitchRequested = 1
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158 /*-----------------------------------------------------------*/
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160 /* Hardware specifics. */
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161 #define portBYTE_ALIGNMENT 4
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162 #define portSTACK_GROWTH ( -1 )
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163 #define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ )
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164 #define portNOP() asm volatile ( "NOP" )
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165 /*-----------------------------------------------------------*/
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167 /* Task function macros as described on the FreeRTOS.org WEB site. */
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168 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
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169 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
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170 /*-----------------------------------------------------------*/
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172 /* The following structure is used by the FreeRTOS exception handler. It is
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173 filled with the MicroBlaze context as it was at the time the exception occurred.
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174 This is done as an aid to debugging exception occurrences. */
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175 typedef struct PORT_REGISTER_DUMP
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177 /* The following structure members hold the values of the MicroBlaze
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178 registers at the time the exception was raised. */
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179 unsigned long ulR1_SP;
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180 unsigned long ulR2_small_data_area;
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181 unsigned long ulR3;
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182 unsigned long ulR4;
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183 unsigned long ulR5;
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184 unsigned long ulR6;
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185 unsigned long ulR7;
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186 unsigned long ulR8;
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187 unsigned long ulR9;
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188 unsigned long ulR10;
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189 unsigned long ulR11;
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190 unsigned long ulR12;
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191 unsigned long ulR13_read_write_small_data_area;
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192 unsigned long ulR14_return_address_from_interrupt;
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193 unsigned long ulR15_return_address_from_subroutine;
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194 unsigned long ulR16_return_address_from_trap;
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195 unsigned long ulR17_return_address_from_exceptions; /* The exception entry code will copy the BTR into R17 if the exception occurred in the delay slot of a branch instruction. */
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196 unsigned long ulR18;
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197 unsigned long ulR19;
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198 unsigned long ulR20;
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199 unsigned long ulR21;
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200 unsigned long ulR22;
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201 unsigned long ulR23;
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202 unsigned long ulR24;
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203 unsigned long ulR25;
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204 unsigned long ulR26;
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205 unsigned long ulR27;
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206 unsigned long ulR28;
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207 unsigned long ulR29;
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208 unsigned long ulR30;
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209 unsigned long ulR31;
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210 unsigned long ulPC;
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211 unsigned long ulESR;
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212 unsigned long ulMSR;
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213 unsigned long ulEAR;
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214 unsigned long ulFSR;
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215 unsigned long ulEDR;
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217 /* A human readable description of the exception cause. The strings used
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218 are the same as the #define constant names found in the
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219 microblaze_exceptions_i.h header file */
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220 signed char *pcExceptionCause;
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222 /* The human readable name of the task that was running at the time the
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223 exception occurred. This is the name that was given to the task when the
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224 task was created using the FreeRTOS xTaskCreate() API function. */
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225 signed char *pcCurrentTaskName;
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227 /* The handle of the task that was running a the time the exception
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229 void * xCurrentTaskHandle;
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231 } xPortRegisterDump;
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235 * Installs pxHandler as the interrupt handler for the peripheral specified by
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236 * the ucInterruptID parameter.
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240 * The ID of the peripheral that will have pxHandler assigned as its interrupt
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241 * handler. Peripheral IDs are defined in the xparameters.h header file, which
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242 * is itself part of the BSP project. For example, in the official demo
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243 * application for this port, xparameters.h defines the following IDs for the
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244 * four possible interrupt sources:
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246 * XPAR_INTC_0_UARTLITE_1_VEC_ID - for the UARTlite peripheral.
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247 * XPAR_INTC_0_TMRCTR_0_VEC_ID - for the AXI Timer 0 peripheral.
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248 * XPAR_INTC_0_EMACLITE_0_VEC_ID - for the Ethernet lite peripheral.
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249 * XPAR_INTC_0_GPIO_1_VEC_ID - for the button inputs.
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254 * A pointer to the interrupt handler function itself. This must be a void
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255 * function that takes a (void *) parameter.
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260 * The parameter passed into the handler function. In many cases this will not
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261 * be used and can be NULL. Some times it is used to pass in a reference to
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262 * the peripheral instance variable, so it can be accessed from inside the
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263 * handler function.
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266 * pdPASS is returned if the function executes successfully. Any other value
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267 * being returned indicates that the function did not execute correctly.
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269 portBASE_TYPE xPortInstallInterruptHandler( unsigned char ucInterruptID, XInterruptHandler pxHandler, void *pvCallBackRef );
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273 * Enables the interrupt, within the interrupt controller, for the peripheral
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274 * specified by the ucInterruptID parameter.
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278 * The ID of the peripheral that will have its interrupt enabled in the
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279 * interrupt controller. Peripheral IDs are defined in the xparameters.h header
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280 * file, which is itself part of the BSP project. For example, in the official
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281 * demo application for this port, xparameters.h defines the following IDs for
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282 * the four possible interrupt sources:
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284 * XPAR_INTC_0_UARTLITE_1_VEC_ID - for the UARTlite peripheral.
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285 * XPAR_INTC_0_TMRCTR_0_VEC_ID - for the AXI Timer 0 peripheral.
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286 * XPAR_INTC_0_EMACLITE_0_VEC_ID - for the Ethernet lite peripheral.
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287 * XPAR_INTC_0_GPIO_1_VEC_ID - for the button inputs.
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290 void vPortEnableInterrupt( unsigned char ucInterruptID );
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293 * Disables the interrupt, within the interrupt controller, for the peripheral
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294 * specified by the ucInterruptID parameter.
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298 * The ID of the peripheral that will have its interrupt disabled in the
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299 * interrupt controller. Peripheral IDs are defined in the xparameters.h header
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300 * file, which is itself part of the BSP project. For example, in the official
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301 * demo application for this port, xparameters.h defines the following IDs for
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302 * the four possible interrupt sources:
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304 * XPAR_INTC_0_UARTLITE_1_VEC_ID - for the UARTlite peripheral.
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305 * XPAR_INTC_0_TMRCTR_0_VEC_ID - for the AXI Timer 0 peripheral.
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306 * XPAR_INTC_0_EMACLITE_0_VEC_ID - for the Ethernet lite peripheral.
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307 * XPAR_INTC_0_GPIO_1_VEC_ID - for the button inputs.
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310 void vPortDisableInterrupt( unsigned char ucInterruptID );
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313 * This is an application defined callback function used to install the tick
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314 * interrupt handler. It is provided as an application callback because the
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315 * kernel will run on lots of different MicroBlaze and FPGA configurations - not
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316 * all of which will have the same timer peripherals defined or available. This
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317 * example uses the AXI Timer 0. If that is available on your hardware platform
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318 * then this example callback implementation should not require modification.
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319 * The name of the interrupt handler that should be installed is vPortTickISR(),
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320 * which the function below declares as an extern.
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322 void vApplicationSetupTimerInterrupt( void );
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325 * This is an application defined callback function used to clear whichever
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326 * interrupt was installed by the the vApplicationSetupTimerInterrupt() callback
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327 * function - in this case the interrupt generated by the AXI timer. It is
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328 * provided as an application callback because the kernel will run on lots of
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329 * different MicroBlaze and FPGA configurations - not all of which will have the
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330 * same timer peripherals defined or available. This example uses the AXI Timer 0.
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331 * If that is available on your hardware platform then this example callback
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332 * implementation should not require modification provided the example definition
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333 * of vApplicationSetupTimerInterrupt() is also not modified.
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335 void vApplicationClearTimerInterrupt( void );
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338 * vPortExceptionsInstallHandlers() is only available when the MicroBlaze
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339 * is configured to include exception functionality, and
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340 * configINSTALL_EXCEPTION_HANDLERS is set to 1 in FreeRTOSConfig.h.
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342 * vPortExceptionsInstallHandlers() installs the FreeRTOS exception handler
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343 * for every possible exception cause.
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345 * vPortExceptionsInstallHandlers() can be called explicitly from application
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346 * code. After that is done, the default FreeRTOS exception handler that will
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347 * have been installed can be replaced for any specific exception cause by using
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348 * the standard Xilinx library function microblaze_register_exception_handler().
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350 * If vPortExceptionsInstallHandlers() is not called explicitly by the
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351 * application, it will be called automatically by the kernel the first time
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352 * xPortInstallInterruptHandler() is called. At that time, any exception
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353 * handlers that may have already been installed will be replaced.
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355 * See the description of vApplicationExceptionRegisterDump() for information
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356 * on the processing performed by the FreeRTOS exception handler.
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358 void vPortExceptionsInstallHandlers( void );
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361 * The FreeRTOS exception handler fills an xPortRegisterDump structure (defined
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362 * in portmacro.h) with the MicroBlaze context, as it was at the time the
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363 * exception occurred. The exception handler then calls
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364 * vApplicationExceptionRegisterDump(), passing in the completed
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365 * xPortRegisterDump structure as its parameter.
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367 * The FreeRTOS kernel provides its own implementation of
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368 * vApplicationExceptionRegisterDump(), but the kernel provided implementation
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369 * is declared as being 'weak'. The weak definition allows the application
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370 * writer to provide their own implementation, should they wish to use the
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371 * register dump information. For example, an implementation could be provided
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372 * that wrote the register dump data to a display, or a UART port.
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374 void vApplicationExceptionRegisterDump( xPortRegisterDump *xRegisterDump );
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381 #endif /* PORTMACRO_H */
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projects / freertos / blob