2 FreeRTOS V8.1.2 - Copyright (C) 2014 Real Time Engineers Ltd.
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5 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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7 ***************************************************************************
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9 * FreeRTOS provides completely free yet professionally developed, *
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10 * robust, strictly quality controlled, supported, and cross *
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11 * platform software that has become a de facto standard. *
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13 * Help yourself get started quickly and support the FreeRTOS *
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14 * project by purchasing a FreeRTOS tutorial book, reference *
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15 * manual, or both from: http://www.FreeRTOS.org/Documentation *
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19 ***************************************************************************
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21 This file is part of the FreeRTOS distribution.
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23 FreeRTOS is free software; you can redistribute it and/or modify it under
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24 the terms of the GNU General Public License (version 2) as published by the
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25 Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
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27 >>! NOTE: The modification to the GPL is included to allow you to !<<
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28 >>! distribute a combined work that includes FreeRTOS without being !<<
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29 >>! obliged to provide the source code for proprietary components !<<
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30 >>! outside of the FreeRTOS kernel. !<<
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32 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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33 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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34 FOR A PARTICULAR PURPOSE. Full license text is available from the following
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35 link: http://www.freertos.org/a00114.html
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39 ***************************************************************************
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41 * Having a problem? Start by reading the FAQ "My application does *
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42 * not run, what could be wrong?" *
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44 * http://www.FreeRTOS.org/FAQHelp.html *
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46 ***************************************************************************
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48 http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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49 license and Real Time Engineers Ltd. contact details.
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51 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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52 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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53 compatible FAT file system, and our tiny thread aware UDP/IP stack.
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55 http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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56 Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
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57 licenses offer ticketed support, indemnification and middleware.
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59 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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60 engineered and independently SIL3 certified version for use in safety and
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61 mission critical applications that require provable dependability.
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67 EXTERN usCriticalNesting
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69 #include "FreeRTOSConfig.h"
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71 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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72 ; Context save and restore macro definitions
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73 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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75 portSAVE_CONTEXT MACRO
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77 add -0x0C,sp ; prepare stack to save necessary values
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78 st.w lp,8[sp] ; store LP to stack
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80 st.w lp,4[sp] ; store EIPC to stack
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82 st.w lp,0[sp] ; store EIPSW to stack
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83 #if configDATA_MODE == 1 ; Using the Tiny data model
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84 prepare {r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30},76,sp ; save general purpose registers
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101 #else ; Using the Small/Large data model
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102 prepare {r20,r21,r22,r23,r24,r26,r27,r28,r29,r30},72,sp ; save general purpose registers
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118 #endif /* configDATA_MODE */
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121 MOVHI hi1(usCriticalNesting),r0,r1 ; save usCriticalNesting value to stack
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122 ld.w lw1(usCriticalNesting)[r1],r2
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124 MOVHI hi1(pxCurrentTCB),r0,r1 ; save SP to top of current TCB
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125 ld.w lw1(pxCurrentTCB)[r1],r2
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130 portRESTORE_CONTEXT MACRO
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132 MOVHI hi1(pxCurrentTCB),r0,r1 ; get Stackpointer address
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133 ld.w lw1(pxCurrentTCB)[r1],sp
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135 ld.w 0[r1],sp ; load stackpointer
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136 MOV sp,ep ; set stack pointer to element pointer
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137 sld.w 0[ep],r1 ; load usCriticalNesting value from stack
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138 MOVHI hi1(usCriticalNesting),r0,r2
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139 st.w r1,lw1(usCriticalNesting)[r2]
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140 sld.w 4[ep],r1 ; restore general purpose registers
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142 #if configDATA_MODE == 1 ; Using Tiny data model
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159 dispose 76,{r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30}
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160 #else ; Using Small/Large data model
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176 dispose 72,{r20,r21,r22,r23,r24,r26,r27,r28,r29,r30}
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177 #endif /* configDATA_MODE */
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178 ld.w 0[sp],lp ; restore EIPSW from stack
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180 ld.w 4[sp],lp ; restore EIPC from stack
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182 ld.w 8[sp],lp ; restore LP from stack
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183 add 0x0C,sp ; set SP to right position
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