2 FreeRTOS V7.5.1 - Copyright (C) 2013 Real Time Engineers Ltd.
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4 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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6 ***************************************************************************
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8 * FreeRTOS provides completely free yet professionally developed, *
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9 * robust, strictly quality controlled, supported, and cross *
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10 * platform software that has become a de facto standard. *
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12 * Help yourself get started quickly and support the FreeRTOS *
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13 * project by purchasing a FreeRTOS tutorial book, reference *
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14 * manual, or both from: http://www.FreeRTOS.org/Documentation *
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18 ***************************************************************************
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20 This file is part of the FreeRTOS distribution.
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22 FreeRTOS is free software; you can redistribute it and/or modify it under
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23 the terms of the GNU General Public License (version 2) as published by the
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24 Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
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26 >>! NOTE: The modification to the GPL is included to allow you to distribute
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27 >>! a combined work that includes FreeRTOS without being obliged to provide
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28 >>! the source code for proprietary components outside of the FreeRTOS
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31 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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32 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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33 FOR A PARTICULAR PURPOSE. Full license text is available from the following
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34 link: http://www.freertos.org/a00114.html
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38 ***************************************************************************
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40 * Having a problem? Start by reading the FAQ "My application does *
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41 * not run, what could be wrong?" *
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43 * http://www.FreeRTOS.org/FAQHelp.html *
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45 ***************************************************************************
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47 http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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48 license and Real Time Engineers Ltd. contact details.
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50 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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51 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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52 compatible FAT file system, and our tiny thread aware UDP/IP stack.
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54 http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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55 Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
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56 licenses offer ticketed support, indemnification and middleware.
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58 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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59 engineered and independently SIL3 certified version for use in safety and
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60 mission critical applications that require provable dependability.
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66 EXTERN usCriticalNesting
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68 #include "FreeRTOSConfig.h"
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70 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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71 ; Context save and restore macro definitions
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72 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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74 portSAVE_CONTEXT MACRO
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76 add -0x0C,sp ; prepare stack to save necessary values
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77 st.w lp,8[sp] ; store LP to stack
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79 st.w lp,4[sp] ; store EIPC to stack
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81 st.w lp,0[sp] ; store EIPSW to stack
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82 #if configDATA_MODE == 1 ; Using the Tiny data model
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83 prepare {r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30},76,sp ; save general purpose registers
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100 #else ; Using the Small/Large data model
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101 prepare {r20,r21,r22,r23,r24,r26,r27,r28,r29,r30},72,sp ; save general purpose registers
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117 #endif /* configDATA_MODE */
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120 MOVHI hi1(usCriticalNesting),r0,r1 ; save usCriticalNesting value to stack
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121 ld.w lw1(usCriticalNesting)[r1],r2
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123 MOVHI hi1(pxCurrentTCB),r0,r1 ; save SP to top of current TCB
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124 ld.w lw1(pxCurrentTCB)[r1],r2
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129 portRESTORE_CONTEXT MACRO
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131 MOVHI hi1(pxCurrentTCB),r0,r1 ; get Stackpointer address
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132 ld.w lw1(pxCurrentTCB)[r1],sp
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134 ld.w 0[r1],sp ; load stackpointer
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135 MOV sp,ep ; set stack pointer to element pointer
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136 sld.w 0[ep],r1 ; load usCriticalNesting value from stack
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137 MOVHI hi1(usCriticalNesting),r0,r2
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138 st.w r1,lw1(usCriticalNesting)[r2]
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139 sld.w 4[ep],r1 ; restore general purpose registers
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141 #if configDATA_MODE == 1 ; Using Tiny data model
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158 dispose 76,{r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30}
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159 #else ; Using Small/Large data model
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175 dispose 72,{r20,r21,r22,r23,r24,r26,r27,r28,r29,r30}
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176 #endif /* configDATA_MODE */
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177 ld.w 0[sp],lp ; restore EIPSW from stack
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179 ld.w 4[sp],lp ; restore EIPC from stack
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181 ld.w 8[sp],lp ; restore LP from stack
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182 add 0x0C,sp ; set SP to right position
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