2 FreeRTOS.org V5.0.4 - Copyright (C) 2003-2008 Richard Barry.
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4 This file is part of the FreeRTOS.org distribution.
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6 FreeRTOS.org is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2 of the License, or
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9 (at your option) any later version.
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11 FreeRTOS.org is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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16 You should have received a copy of the GNU General Public License
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17 along with FreeRTOS.org; if not, write to the Free Software
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18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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20 A special exception to the GPL can be applied should you wish to distribute
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21 a combined work that includes FreeRTOS.org, without being obliged to provide
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22 the source code for any proprietary components. See the licensing section
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23 of http://www.FreeRTOS.org for full details of how and when the exception
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26 ***************************************************************************
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27 ***************************************************************************
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29 * SAVE TIME AND MONEY! We can port FreeRTOS.org to your own hardware, *
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30 * and even write all or part of your application on your behalf. *
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31 * See http://www.OpenRTOS.com for details of the services we provide to *
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32 * expedite your project. *
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34 ***************************************************************************
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35 ***************************************************************************
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37 Please ensure to read the configuration and relevant port sections of the
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38 online documentation.
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40 http://www.FreeRTOS.org - Documentation, latest information, license and
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43 http://www.SafeRTOS.com - A version that is certified for use in safety
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46 http://www.OpenRTOS.com - Commercial support, development, porting,
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47 licensing and training services.
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51 * Purpose: Lowest level routines for all ColdFire processors.
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55 * ulPortSetIPL() and mcf5xxx_wr_cacr() copied with permission from FreeScale
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56 * supplied source files.
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59 .global ulPortSetIPL
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60 .global mcf5xxx_wr_cacr
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61 .global __cs3_isr_interrupt_80
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62 .global vPortStartFirstTask
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66 .macro portSAVE_CONTEXT
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68 lea.l (-60, %sp), %sp
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69 movem.l %d0-%fp, (%sp)
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70 move.l pxCurrentTCB, %a0
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75 .macro portRESTORE_CONTEXT
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77 move.l pxCurrentTCB, %a0
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79 movem.l (%sp), %d0-%fp
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85 /********************************************************************/
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87 * This routines changes the IPL to the value passed into the routine.
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88 * It also returns the old IPL value back.
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89 * Calling convention from C:
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90 * old_ipl = asm_set_ipl(new_ipl);
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91 * For the Diab Data C compiler, it passes return value thru D0.
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92 * Note that only the least significant three bits of the passed
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100 move.w SR,D7 /* current sr */
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102 move.l D7,D0 /* prepare return value */
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103 andi.l #0x0700,D0 /* mask out IPL */
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104 lsr.l #8,D0 /* IPL */
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106 move.l 8(A6),D6 /* get argument */
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107 andi.l #0x07,D6 /* least significant three bits */
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108 lsl.l #8,D6 /* move over to make mask */
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110 andi.l #0x0000F8FF,D7 /* zero out current IPL */
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111 or.l D6,D7 /* place new IPL in sr */
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118 /********************************************************************/
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122 .long 0x4e7b0002 /* movec d0,cacr */
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126 /********************************************************************/
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128 /* Yield interrupt. */
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129 __cs3_isr_interrupt_80:
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131 jsr vPortYieldHandler
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132 portRESTORE_CONTEXT
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134 /********************************************************************/
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137 vPortStartFirstTask:
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138 portRESTORE_CONTEXT
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