2 ; FreeRTOS V7.5.2 - Copyright (C) 2013 Real Time Engineers Ltd.
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5 ; ***************************************************************************
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7 ; * FreeRTOS tutorial books are available in pdf and paperback. *
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8 ; * Complete, revised, and edited pdf reference manuals are also *
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11 ; * Purchasing FreeRTOS documentation will not only help you, by *
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12 ; * ensuring you get running as quickly as possible and with an *
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13 ; * in-depth knowledge of how to use FreeRTOS, it will also help *
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14 ; * the FreeRTOS project to continue with its mission of providing *
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15 ; * professional grade, cross platform, de facto standard solutions *
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16 ; * for microcontrollers - completely free of charge! *
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18 ; * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
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20 ; * Thank you for using FreeRTOS, and thank you for your support! *
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22 ; ***************************************************************************
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25 ; This file is part of the FreeRTOS distribution.
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27 ; FreeRTOS is free software; you can redistribute it and/or modify it under
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28 ; the terms of the GNU General Public License (version 2) as published by the
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29 ; Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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30 ; >>>NOTE<<< The modification to the GPL is included to allow you to
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31 ; distribute a combined work that includes FreeRTOS without being obliged to
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32 ; provide the source code for proprietary components outside of the FreeRTOS
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33 ; kernel. FreeRTOS is distributed in the hope that it will be useful, but
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34 ; WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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35 ; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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36 ; more details. You should have received a copy of the GNU General Public
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37 ; License and the FreeRTOS license exception along with FreeRTOS; if not it
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38 ; can be viewed here: http://www.freertos.org/a00114.html and also obtained
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39 ; by writing to Richard Barry, contact details for whom are available on the
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40 ; FreeRTOS WEB site.
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42 ; 1 tab == 4 spaces!
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44 ; http://www.FreeRTOS.org - Documentation, latest information, license and
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47 ; http://www.SafeRTOS.com - A version that is certified for use in safety
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50 ; http://www.OpenRTOS.com - Commercial support, development, porting,
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51 ; licensing and training services.
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53 .macro portSAVE_CONTEXT
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55 ; Save r0 to r14 and pr.
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58 ; Save mac1, mach and gbr
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63 ; Get the address of pxCurrentTCB
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64 mov.l #_pxCurrentTCB, r0
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66 ; Get the address of pxTopOfStack from the TCB.
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69 ; Save the stack pointer in pxTopOfStack.
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74 ;-----------------------------------------------------------
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76 .macro portRESTORE_CONTEXT
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78 ; Get the address of the pxCurrentTCB variable.
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79 mov.l #_pxCurrentTCB, r0
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81 ; Get the address of the task stack from pxCurrentTCB.
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84 ; Get the task stack itself into the stack pointer.
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87 ; Restore system registers.
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92 ; Restore r0 to r14 and PR
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95 ; Pop the SR and PC to jump to the start of the task.
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100 ;-----------------------------------------------------------