]> git.sur5r.net Git - freertos/blob - FreeRTOS/Source/portable/GCC/ColdFire_V2/port.c
Update version numbers in preparation for V8.2.0 release candidate 1.
[freertos] / FreeRTOS / Source / portable / GCC / ColdFire_V2 / port.c
1 /*\r
2     FreeRTOS V8.2.0rc1 - 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     This file is part of the FreeRTOS distribution.\r
8 \r
9     FreeRTOS is free software; you can redistribute it and/or modify it under\r
10     the terms of the GNU General Public License (version 2) as published by the\r
11     Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.\r
12 \r
13     >>!   NOTE: The modification to the GPL is included to allow you to     !<<\r
14     >>!   distribute a combined work that includes FreeRTOS without being   !<<\r
15     >>!   obliged to provide the source code for proprietary components     !<<\r
16     >>!   outside of the FreeRTOS kernel.                                   !<<\r
17 \r
18     FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY\r
19     WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\r
20     FOR A PARTICULAR PURPOSE.  Full license text is available on the following\r
21     link: http://www.freertos.org/a00114.html\r
22 \r
23     1 tab == 4 spaces!\r
24 \r
25     ***************************************************************************\r
26      *                                                                       *\r
27      *    Having a problem?  Start by reading the FAQ "My application does   *\r
28      *    not run, what could be wrong?".  Have you defined configASSERT()?  *\r
29      *                                                                       *\r
30      *    http://www.FreeRTOS.org/FAQHelp.html                               *\r
31      *                                                                       *\r
32     ***************************************************************************\r
33 \r
34     ***************************************************************************\r
35      *                                                                       *\r
36      *    FreeRTOS provides completely free yet professionally developed,    *\r
37      *    robust, strictly quality controlled, supported, and cross          *\r
38      *    platform software that is more than just the market leader, it     *\r
39      *    is the industry's de facto standard.                               *\r
40      *                                                                       *\r
41      *    Help yourself get started quickly while simultaneously helping     *\r
42      *    to support the FreeRTOS project by purchasing a FreeRTOS           *\r
43      *    tutorial book, reference manual, or both:                          *\r
44      *    http://www.FreeRTOS.org/Documentation                              *\r
45      *                                                                       *\r
46     ***************************************************************************\r
47 \r
48     ***************************************************************************\r
49      *                                                                       *\r
50      *   Investing in training allows your team to be as productive as       *\r
51      *   possible as early as possible, lowering your overall development    *\r
52      *   cost, and enabling you to bring a more robust product to market     *\r
53      *   earlier than would otherwise be possible.  Richard Barry is both    *\r
54      *   the architect and key author of FreeRTOS, and so also the world's   *\r
55      *   leading authority on what is the world's most popular real time     *\r
56      *   kernel for deeply embedded MCU designs.  Obtaining your training    *\r
57      *   from Richard ensures your team will gain directly from his in-depth *\r
58      *   product knowledge and years of usage experience.  Contact Real Time *\r
59      *   Engineers Ltd to enquire about the FreeRTOS Masterclass, presented  *\r
60      *   by Richard Barry:  http://www.FreeRTOS.org/contact\r
61      *                                                                       *\r
62     ***************************************************************************\r
63 \r
64     ***************************************************************************\r
65      *                                                                       *\r
66      *    You are receiving this top quality software for free.  Please play *\r
67      *    fair and reciprocate by reporting any suspected issues and         *\r
68      *    participating in the community forum:                              *\r
69      *    http://www.FreeRTOS.org/support                                    *\r
70      *                                                                       *\r
71      *    Thank you!                                                         *\r
72      *                                                                       *\r
73     ***************************************************************************\r
74 \r
75     http://www.FreeRTOS.org - Documentation, books, training, latest versions,\r
76     license and Real Time Engineers Ltd. contact details.\r
77 \r
78     http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,\r
79     including FreeRTOS+Trace - an indispensable productivity tool, a DOS\r
80     compatible FAT file system, and our tiny thread aware UDP/IP stack.\r
81 \r
82     http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.\r
83     Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.\r
84 \r
85     http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High\r
86     Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS\r
87     licenses offer ticketed support, indemnification and commercial middleware.\r
88 \r
89     http://www.SafeRTOS.com - High Integrity Systems also provide a safety\r
90     engineered and independently SIL3 certified version for use in safety and\r
91     mission critical applications that require provable dependability.\r
92 \r
93     1 tab == 4 spaces!\r
94 */\r
95 \r
96 /* Kernel includes. */\r
97 #include "FreeRTOS.h"\r
98 #include "task.h"\r
99 \r
100 #define portINITIAL_FORMAT_VECTOR               ( ( StackType_t ) 0x4000 )\r
101 \r
102 /* Supervisor mode set. */\r
103 #define portINITIAL_STATUS_REGISTER             ( ( StackType_t ) 0x2000)\r
104 \r
105 /* Used to keep track of the number of nested calls to taskENTER_CRITICAL().  This\r
106 will be set to 0 prior to the first task being started. */\r
107 static uint32_t ulCriticalNesting = 0x9999UL;\r
108 \r
109 /*-----------------------------------------------------------*/\r
110 \r
111 StackType_t *pxPortInitialiseStack( StackType_t * pxTopOfStack, TaskFunction_t pxCode, void *pvParameters )\r
112 {\r
113         *pxTopOfStack = ( StackType_t ) pvParameters;\r
114         pxTopOfStack--;\r
115 \r
116         *pxTopOfStack = (StackType_t) 0xDEADBEEF;\r
117         pxTopOfStack--;\r
118 \r
119         /* Exception stack frame starts with the return address. */\r
120         *pxTopOfStack = ( StackType_t ) pxCode;\r
121         pxTopOfStack--;\r
122 \r
123         *pxTopOfStack = ( portINITIAL_FORMAT_VECTOR << 16UL ) | ( portINITIAL_STATUS_REGISTER );\r
124         pxTopOfStack--;\r
125 \r
126         *pxTopOfStack = ( StackType_t ) 0x0; /*FP*/\r
127         pxTopOfStack -= 14; /* A5 to D0. */\r
128 \r
129     return pxTopOfStack;\r
130 }\r
131 /*-----------------------------------------------------------*/\r
132 \r
133 BaseType_t xPortStartScheduler( void )\r
134 {\r
135 extern void vPortStartFirstTask( void );\r
136 \r
137         ulCriticalNesting = 0UL;\r
138 \r
139         /* Configure the interrupts used by this port. */\r
140         vApplicationSetupInterrupts();\r
141 \r
142         /* Start the first task executing. */\r
143         vPortStartFirstTask();\r
144 \r
145         return pdFALSE;\r
146 }\r
147 /*-----------------------------------------------------------*/\r
148 \r
149 void vPortEndScheduler( void )\r
150 {\r
151         /* Not implemented as there is nothing to return to. */\r
152 }\r
153 /*-----------------------------------------------------------*/\r
154 \r
155 void vPortEnterCritical( void )\r
156 {\r
157         if( ulCriticalNesting == 0UL )\r
158         {\r
159                 /* Guard against context switches being pended simultaneously with a\r
160                 critical section being entered. */\r
161                 do\r
162                 {\r
163                         portDISABLE_INTERRUPTS();\r
164                         if( MCF_INTC0_INTFRCL == 0UL )\r
165                         {\r
166                                 break;\r
167                         }\r
168 \r
169                         portENABLE_INTERRUPTS();\r
170 \r
171                 } while( 1 );\r
172         }\r
173         ulCriticalNesting++;\r
174 }\r
175 /*-----------------------------------------------------------*/\r
176 \r
177 void vPortExitCritical( void )\r
178 {\r
179         ulCriticalNesting--;\r
180         if( ulCriticalNesting == 0 )\r
181         {\r
182                 portENABLE_INTERRUPTS();\r
183         }\r
184 }\r
185 /*-----------------------------------------------------------*/\r
186 \r
187 void vPortYieldHandler( void )\r
188 {\r
189 uint32_t ulSavedInterruptMask;\r
190 \r
191         ulSavedInterruptMask = portSET_INTERRUPT_MASK_FROM_ISR();\r
192                 /* Note this will clear all forced interrupts - this is done for speed. */\r
193                 MCF_INTC0_INTFRCL = 0;\r
194                 vTaskSwitchContext();\r
195         portCLEAR_INTERRUPT_MASK_FROM_ISR( ulSavedInterruptMask );\r
196 }\r
197 \r
198 \r
199 \r
200 \r
201 \r
202 \r