2 FreeRTOS V8.1.1 - Copyright (C) 2014 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 ***************************************************************************
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9 * FreeRTOS provides completely free yet professionally developed, *
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10 * robust, strictly quality controlled, supported, and cross *
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11 * platform software that has become a de facto standard. *
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13 * Help yourself get started quickly and support the FreeRTOS *
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14 * project by purchasing a FreeRTOS tutorial book, reference *
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15 * manual, or both from: http://www.FreeRTOS.org/Documentation *
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19 ***************************************************************************
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21 This file is part of the FreeRTOS distribution.
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23 FreeRTOS is free software; you can redistribute it and/or modify it under
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24 the terms of the GNU General Public License (version 2) as published by the
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25 Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
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27 >>! NOTE: The modification to the GPL is included to allow you to !<<
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28 >>! distribute a combined work that includes FreeRTOS without being !<<
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29 >>! obliged to provide the source code for proprietary components !<<
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30 >>! outside of the FreeRTOS kernel. !<<
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32 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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33 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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34 FOR A PARTICULAR PURPOSE. Full license text is available from the following
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35 link: http://www.freertos.org/a00114.html
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39 ***************************************************************************
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41 * Having a problem? Start by reading the FAQ "My application does *
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42 * not run, what could be wrong?" *
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44 * http://www.FreeRTOS.org/FAQHelp.html *
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46 ***************************************************************************
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48 http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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49 license and Real Time Engineers Ltd. contact details.
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51 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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52 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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53 compatible FAT file system, and our tiny thread aware UDP/IP stack.
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55 http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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56 Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
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57 licenses offer ticketed support, indemnification and middleware.
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59 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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60 engineered and independently SIL3 certified version for use in safety and
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61 mission critical applications that require provable dependability.
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67 * Purpose: Lowest level routines for all ColdFire processors.
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71 * ulPortSetIPL() and mcf5xxx_wr_cacr() copied with permission from FreeScale
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72 * supplied source files.
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75 .global ulPortSetIPL
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76 .global _ulPortSetIPL
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77 .global mcf5xxx_wr_cacrx
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78 .global _mcf5xxx_wr_cacrx
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79 .global vPortYieldISR
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80 .global _vPortYieldISR
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81 .global vPortStartFirstTask
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82 .global _vPortStartFirstTask
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83 .extern _pxCurrentTCB
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84 .extern _vPortYieldHandler
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88 .macro portSAVE_CONTEXT
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92 move.l _pxCurrentTCB, a0
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97 .macro portRESTORE_CONTEXT
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99 move.l _pxCurrentTCB, a0
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101 movem.l (sp), d0-a6
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107 /********************************************************************/
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109 * This routines changes the IPL to the value passed into the routine.
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110 * It also returns the old IPL value back.
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111 * Calling convention from C:
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112 * old_ipl = asm_set_ipl(new_ipl);
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113 * For the Diab Data C compiler, it passes return value thru D0.
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114 * Note that only the least significant three bits of the passed
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123 move.w SR,D7 /* current sr */
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125 move.l D7,D6 /* prepare return value */
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126 andi.l #0x0700,D6 /* mask out IPL */
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127 lsr.l #8,D6 /* IPL */
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129 andi.l #0x07,D0 /* least significant three bits */
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130 lsl.l #8,D0 /* move over to make mask */
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132 andi.l #0x0000F8FF,D7 /* zero out current IPL */
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133 or.l D0,D7 /* place new IPL in sr */
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136 move.l D6, D0 /* Return value in D0. */
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141 /********************************************************************/
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146 .long 0x4e7b0002 /* movec d0,cacr */
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150 /********************************************************************/
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152 /* Yield interrupt. */
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156 jsr _vPortYieldHandler
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157 portRESTORE_CONTEXT
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159 /********************************************************************/
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162 vPortStartFirstTask:
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163 _vPortStartFirstTask:
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164 portRESTORE_CONTEXT
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