2 FreeRTOS V7.5.0 - Copyright (C) 2013 Real Time Engineers Ltd.
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4 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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6 ***************************************************************************
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8 * FreeRTOS provides completely free yet professionally developed, *
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9 * robust, strictly quality controlled, supported, and cross *
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10 * platform software that has become a de facto standard. *
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12 * Help yourself get started quickly and support the FreeRTOS *
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13 * project by purchasing a FreeRTOS tutorial book, reference *
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14 * manual, or both from: http://www.FreeRTOS.org/Documentation *
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18 ***************************************************************************
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20 This file is part of the FreeRTOS distribution.
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22 FreeRTOS is free software; you can redistribute it and/or modify it under
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23 the terms of the GNU General Public License (version 2) as published by the
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24 Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
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26 >>! NOTE: The modification to the GPL is included to allow you to distribute
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27 >>! a combined work that includes FreeRTOS without being obliged to provide
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28 >>! the source code for proprietary components outside of the FreeRTOS
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31 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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32 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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33 FOR A PARTICULAR PURPOSE. Full license text is available from the following
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34 link: http://www.freertos.org/a00114.html
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38 ***************************************************************************
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40 * Having a problem? Start by reading the FAQ "My application does *
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41 * not run, what could be wrong?" *
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43 * http://www.FreeRTOS.org/FAQHelp.html *
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45 ***************************************************************************
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47 http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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48 license and Real Time Engineers Ltd. contact details.
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50 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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51 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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52 compatible FAT file system, and our tiny thread aware UDP/IP stack.
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54 http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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55 Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
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56 licenses offer ticketed support, indemnification and middleware.
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58 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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59 engineered and independently SIL3 certified version for use in safety and
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60 mission critical applications that require provable dependability.
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66 * Purpose: Lowest level routines for all ColdFire processors.
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70 * ulPortSetIPL() and mcf5xxx_wr_cacr() copied with permission from FreeScale
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71 * supplied source files.
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74 .global ulPortSetIPL
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75 .global _ulPortSetIPL
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76 .global mcf5xxx_wr_cacrx
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77 .global _mcf5xxx_wr_cacrx
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78 .global vPortYieldISR
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79 .global _vPortYieldISR
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80 .global vPortStartFirstTask
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81 .global _vPortStartFirstTask
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82 .extern _pxCurrentTCB
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83 .extern _vPortYieldHandler
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87 .macro portSAVE_CONTEXT
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91 move.l _pxCurrentTCB, a0
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96 .macro portRESTORE_CONTEXT
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98 move.l _pxCurrentTCB, a0
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100 movem.l (sp), d0-a6
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106 /********************************************************************/
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108 * This routines changes the IPL to the value passed into the routine.
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109 * It also returns the old IPL value back.
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110 * Calling convention from C:
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111 * old_ipl = asm_set_ipl(new_ipl);
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112 * For the Diab Data C compiler, it passes return value thru D0.
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113 * Note that only the least significant three bits of the passed
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122 move.w SR,D7 /* current sr */
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124 move.l D7,D6 /* prepare return value */
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125 andi.l #0x0700,D6 /* mask out IPL */
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126 lsr.l #8,D6 /* IPL */
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128 andi.l #0x07,D0 /* least significant three bits */
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129 lsl.l #8,D0 /* move over to make mask */
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131 andi.l #0x0000F8FF,D7 /* zero out current IPL */
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132 or.l D0,D7 /* place new IPL in sr */
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135 move.l D6, D0 /* Return value in D0. */
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140 /********************************************************************/
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145 .long 0x4e7b0002 /* movec d0,cacr */
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149 /********************************************************************/
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151 /* Yield interrupt. */
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155 jsr _vPortYieldHandler
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156 portRESTORE_CONTEXT
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158 /********************************************************************/
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161 vPortStartFirstTask:
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162 _vPortStartFirstTask:
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163 portRESTORE_CONTEXT
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