2 FreeRTOS V7.1.1 - Copyright (C) 2012 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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44 ***************************************************************************
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46 * Having a problem? Start by reading the FAQ "My application does *
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47 * not run, what could be wrong? *
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49 * http://www.FreeRTOS.org/FAQHelp.html *
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51 ***************************************************************************
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54 http://www.FreeRTOS.org - Documentation, training, latest information,
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55 license and contact details.
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57 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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58 including FreeRTOS+Trace - an indispensable productivity tool.
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60 Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
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61 the code with commercial support, indemnification, and middleware, under
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62 the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
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63 provide a safety engineered and independently SIL3 certified version under
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64 the SafeRTOS brand: http://www.SafeRTOS.com.
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68 EXTERN usCriticalNesting
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70 #include "FreeRTOSConfig.h"
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72 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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73 ; Context save and restore macro definitions
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74 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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76 portSAVE_CONTEXT MACRO
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78 add -0x0C,sp ; prepare stack to save necessary values
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79 st.w lp,8[sp] ; store LP to stack
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81 st.w lp,4[sp] ; store EIPC to stack
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83 st.w lp,0[sp] ; store EIPSW to stack
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84 #if configDATA_MODE == 1 ; Using the Tiny data model
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85 prepare {r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30},76,sp ; save general purpose registers
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102 #else ; Using the Small/Large data model
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103 prepare {r20,r21,r22,r23,r24,r26,r27,r28,r29,r30},72,sp ; save general purpose registers
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119 #endif /* configDATA_MODE */
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122 MOVHI hi1(usCriticalNesting),r0,r1 ; save usCriticalNesting value to stack
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123 ld.w lw1(usCriticalNesting)[r1],r2
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125 MOVHI hi1(pxCurrentTCB),r0,r1 ; save SP to top of current TCB
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126 ld.w lw1(pxCurrentTCB)[r1],r2
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131 portRESTORE_CONTEXT MACRO
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133 MOVHI hi1(pxCurrentTCB),r0,r1 ; get Stackpointer address
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134 ld.w lw1(pxCurrentTCB)[r1],sp
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136 ld.w 0[r1],sp ; load stackpointer
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137 MOV sp,ep ; set stack pointer to element pointer
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138 sld.w 0[ep],r1 ; load usCriticalNesting value from stack
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139 MOVHI hi1(usCriticalNesting),r0,r2
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140 st.w r1,lw1(usCriticalNesting)[r2]
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141 sld.w 4[ep],r1 ; restore general purpose registers
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143 #if configDATA_MODE == 1 ; Using Tiny data model
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160 dispose 76,{r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30}
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161 #else ; Using Small/Large data model
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177 dispose 72,{r20,r21,r22,r23,r24,r26,r27,r28,r29,r30}
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178 #endif /* configDATA_MODE */
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179 ld.w 0[sp],lp ; restore EIPSW from stack
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181 ld.w 4[sp],lp ; restore EIPC from stack
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183 ld.w 8[sp],lp ; restore LP from stack
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184 add 0x0C,sp ; set SP to right position
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