git.sur5r.net Git - freertos/blob - FreeRTOS/Source/portable/IAR/RX600/port.c

   1 /*\r
   2     FreeRTOS V8.1.2 - Copyright (C) 2014 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     !<<\r
  28     >>!   distribute a combined work that includes FreeRTOS without being   !<<\r
  29     >>!   obliged to provide the source code for proprietary components     !<<\r
  30     >>!   outside of the FreeRTOS 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 /*-----------------------------------------------------------\r
  67  * Implementation of functions defined in portable.h for the SH2A port.\r
  68  *----------------------------------------------------------*/\r
  69 \r
  70 /* Scheduler includes. */\r
  71 #include "FreeRTOS.h"\r
  72 #include "task.h"\r
  73 \r
  74 /* Library includes. */\r
  75 #include "string.h"\r
  76 \r
  77 /* Hardware specifics. */\r
  78 #include <iorx62n.h>\r
  79 \r
  80 /*-----------------------------------------------------------*/\r
  81 \r
  82 /* Tasks should start with interrupts enabled and in Supervisor mode, therefore\r
  83 PSW is set with U and I set, and PM and IPL clear. */\r
  84 #define portINITIAL_PSW  ( ( StackType_t ) 0x00030000 )\r
  85 #define portINITIAL_FPSW        ( ( StackType_t ) 0x00000100 )\r
  86 \r
  87 /*-----------------------------------------------------------*/\r
  88 \r
  89 /*\r
  90  * Function to start the first task executing - written in asm code as direct\r
  91  * access to registers is required.\r
  92  */\r
  93 extern void prvStartFirstTask( void );\r
  94 \r
  95 /*\r
  96  * The tick ISR handler.  The peripheral used is configured by the application\r
  97  * via a hook/callback function.\r
  98  */\r
  99 __interrupt void vTickISR( void );\r
 100 \r
 101 /*-----------------------------------------------------------*/\r
 102 \r
 103 extern void *pxCurrentTCB;\r
 104 \r
 105 /*-----------------------------------------------------------*/\r
 106 \r
 107 /*\r
 108  * See header file for description.\r
 109  */\r
 110 StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters )\r
 111 {\r
 112         /* R0 is not included as it is the stack pointer. */\r
 113 \r
 114         *pxTopOfStack = 0x00;\r
 115         pxTopOfStack--;\r
 116         *pxTopOfStack = portINITIAL_PSW;\r
 117         pxTopOfStack--;\r
 118         *pxTopOfStack = ( StackType_t ) pxCode;\r
 119 \r
 120         /* When debugging it can be useful if every register is set to a known\r
 121         value.  Otherwise code space can be saved by just setting the registers\r
 122         that need to be set. */\r
 123         #ifdef USE_FULL_REGISTER_INITIALISATION\r
 124         {\r
 125                 pxTopOfStack--;\r
 126                 *pxTopOfStack = 0xffffffff;     /* r15. */\r
 127                 pxTopOfStack--;\r
 128                 *pxTopOfStack = 0xeeeeeeee;\r
 129                 pxTopOfStack--;\r
 130                 *pxTopOfStack = 0xdddddddd;\r
 131                 pxTopOfStack--;\r
 132                 *pxTopOfStack = 0xcccccccc;\r
 133                 pxTopOfStack--;\r
 134                 *pxTopOfStack = 0xbbbbbbbb;\r
 135                 pxTopOfStack--;\r
 136                 *pxTopOfStack = 0xaaaaaaaa;\r
 137                 pxTopOfStack--;\r
 138                 *pxTopOfStack = 0x99999999;\r
 139                 pxTopOfStack--;\r
 140                 *pxTopOfStack = 0x88888888;\r
 141                 pxTopOfStack--;\r
 142                 *pxTopOfStack = 0x77777777;\r
 143                 pxTopOfStack--;\r
 144                 *pxTopOfStack = 0x66666666;\r
 145                 pxTopOfStack--;\r
 146                 *pxTopOfStack = 0x55555555;\r
 147                 pxTopOfStack--;\r
 148                 *pxTopOfStack = 0x44444444;\r
 149                 pxTopOfStack--;\r
 150                 *pxTopOfStack = 0x33333333;\r
 151                 pxTopOfStack--;\r
 152                 *pxTopOfStack = 0x22222222;\r
 153                 pxTopOfStack--;\r
 154         }\r
 155         #else\r
 156         {\r
 157                 pxTopOfStack -= 15;\r
 158         }\r
 159         #endif\r
 160 \r
 161         *pxTopOfStack = ( StackType_t ) pvParameters; /* R1 */\r
 162         pxTopOfStack--;\r
 163         *pxTopOfStack = portINITIAL_FPSW;\r
 164         pxTopOfStack--;\r
 165         *pxTopOfStack = 0x12345678; /* Accumulator. */\r
 166         pxTopOfStack--;\r
 167         *pxTopOfStack = 0x87654321; /* Accumulator. */\r
 168 \r
 169         return pxTopOfStack;\r
 170 }\r
 171 /*-----------------------------------------------------------*/\r
 172 \r
 173 BaseType_t xPortStartScheduler( void )\r
 174 {\r
 175 extern void vApplicationSetupTimerInterrupt( void );\r
 176 \r
 177         /* Use pxCurrentTCB just so it does not get optimised away. */\r
 178         if( pxCurrentTCB != NULL )\r
 179         {\r
 180                 /* Call an application function to set up the timer that will generate the\r
 181                 tick interrupt.  This way the application can decide which peripheral to\r
 182                 use.  A demo application is provided to show a suitable example. */\r
 183                 vApplicationSetupTimerInterrupt();\r
 184 \r
 185                 /* Enable the software interrupt. */\r
 186                 _IEN( _ICU_SWINT ) = 1;\r
 187 \r
 188                 /* Ensure the software interrupt is clear. */\r
 189                 _IR( _ICU_SWINT ) = 0;\r
 190 \r
 191                 /* Ensure the software interrupt is set to the kernel priority. */\r
 192                 _IPR( _ICU_SWINT ) = configKERNEL_INTERRUPT_PRIORITY;\r
 193 \r
 194                 /* Start the first task. */\r
 195                 prvStartFirstTask();\r
 196         }\r
 197 \r
 198         /* Should not get here. */\r
 199         return pdFAIL;\r
 200 }\r
 201 /*-----------------------------------------------------------*/\r
 202 \r
 203 #pragma vector = configTICK_VECTOR\r
 204 __interrupt void vTickISR( void )\r
 205 {\r
 206         /* Re-enable interrupts. */\r
 207         __enable_interrupt();\r
 208 \r
 209         /* Increment the tick, and perform any processing the new tick value\r
 210         necessitates. */\r
 211         __set_interrupt_level( configMAX_SYSCALL_INTERRUPT_PRIORITY );\r
 212         {\r
 213                 if( xTaskIncrementTick() != pdFALSE )\r
 214                 {\r
 215                         taskYIELD();\r
 216                 }\r
 217         }\r
 218         __set_interrupt_level( configKERNEL_INTERRUPT_PRIORITY );\r
 219 }\r
 220 /*-----------------------------------------------------------*/\r
 221 \r
 222 void vPortEndScheduler( void )\r
 223 {\r
 224         /* Not implemented in ports where there is nothing to return to.\r
 225         Artificially force an assert. */\r
 226         configASSERT( pxCurrentTCB == NULL );\r
 227 }\r
 228 /*-----------------------------------------------------------*/\r
 229 \r
 230 \r
 231 \r