2 FreeRTOS V7.3.0 - Copyright (C) 2012 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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32 >>>NOTE<<< The modification to the GPL is included to allow you to
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33 distribute a combined work that includes FreeRTOS without being obliged to
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34 provide the source code for proprietary components outside of the FreeRTOS
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35 kernel. FreeRTOS is distributed in the hope that it will be useful, but
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36 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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37 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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38 more details. You should have received a copy of the GNU General Public
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39 License and the FreeRTOS license exception along with FreeRTOS; if not it
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40 can be viewed here: http://www.freertos.org/a00114.html and also obtained
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41 by writing to Richard Barry, contact details for whom are available on the
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46 ***************************************************************************
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48 * Having a problem? Start by reading the FAQ "My application does *
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49 * not run, what could be wrong?" *
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51 * http://www.FreeRTOS.org/FAQHelp.html *
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53 ***************************************************************************
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56 http://www.FreeRTOS.org - Documentation, training, latest versions, license
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57 and contact details.
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59 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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60 including FreeRTOS+Trace - an indispensable productivity tool.
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62 Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
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63 the code with commercial support, indemnification, and middleware, under
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64 the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
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65 provide a safety engineered and independently SIL3 certified version under
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66 the SafeRTOS brand: http://www.SafeRTOS.com.
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70 * Purpose: Lowest level routines for all ColdFire processors.
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74 * ulPortSetIPL() and mcf5xxx_wr_cacr() copied with permission from FreeScale
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75 * supplied source files.
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78 .global ulPortSetIPL
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79 .global mcf5xxx_wr_cacr
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80 .global __cs3_isr_interrupt_80
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81 .global vPortStartFirstTask
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85 .macro portSAVE_CONTEXT
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87 lea.l (-60, %sp), %sp
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88 movem.l %d0-%fp, (%sp)
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89 move.l pxCurrentTCB, %a0
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94 .macro portRESTORE_CONTEXT
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96 move.l pxCurrentTCB, %a0
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98 movem.l (%sp), %d0-%fp
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104 /********************************************************************/
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106 * This routines changes the IPL to the value passed into the routine.
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107 * It also returns the old IPL value back.
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108 * Calling convention from C:
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109 * old_ipl = asm_set_ipl(new_ipl);
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110 * For the Diab Data C compiler, it passes return value thru D0.
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111 * Note that only the least significant three bits of the passed
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119 move.w SR,D7 /* current sr */
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121 move.l D7,D0 /* prepare return value */
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122 andi.l #0x0700,D0 /* mask out IPL */
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123 lsr.l #8,D0 /* IPL */
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125 move.l 8(A6),D6 /* get argument */
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126 andi.l #0x07,D6 /* least significant three bits */
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127 lsl.l #8,D6 /* move over to make mask */
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129 andi.l #0x0000F8FF,D7 /* zero out current IPL */
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130 or.l D6,D7 /* place new IPL in sr */
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137 /********************************************************************/
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141 .long 0x4e7b0002 /* movec d0,cacr */
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145 /********************************************************************/
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147 /* Yield interrupt. */
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148 __cs3_isr_interrupt_80:
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150 jsr vPortYieldHandler
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151 portRESTORE_CONTEXT
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153 /********************************************************************/
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156 vPortStartFirstTask:
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157 portRESTORE_CONTEXT
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