2 FreeRTOS V7.0.0 - Copyright (C) 2011 Real Time Engineers Ltd.
\r
5 ***************************************************************************
\r
7 * FreeRTOS tutorial books are available in pdf and paperback. *
\r
8 * Complete, revised, and edited pdf reference manuals are also *
\r
11 * Purchasing FreeRTOS documentation will not only help you, by *
\r
12 * ensuring you get running as quickly as possible and with an *
\r
13 * in-depth knowledge of how to use FreeRTOS, it will also help *
\r
14 * the FreeRTOS project to continue with its mission of providing *
\r
15 * professional grade, cross platform, de facto standard solutions *
\r
16 * for microcontrollers - completely free of charge! *
\r
18 * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
\r
20 * Thank you for using FreeRTOS, and thank you for your support! *
\r
22 ***************************************************************************
\r
25 This file is part of the FreeRTOS distribution.
\r
27 FreeRTOS is free software; you can redistribute it and/or modify it under
\r
28 the terms of the GNU General Public License (version 2) as published by the
\r
29 Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
\r
30 >>>NOTE<<< The modification to the GPL is included to allow you to
\r
31 distribute a combined work that includes FreeRTOS without being obliged to
\r
32 provide the source code for proprietary components outside of the FreeRTOS
\r
33 kernel. FreeRTOS is distributed in the hope that it will be useful, but
\r
34 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
\r
35 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
\r
36 more details. You should have received a copy of the GNU General Public
\r
37 License and the FreeRTOS license exception along with FreeRTOS; if not it
\r
38 can be viewed here: http://www.freertos.org/a00114.html and also obtained
\r
39 by writing to Richard Barry, contact details for whom are available on the
\r
44 http://www.FreeRTOS.org - Documentation, latest information, license and
\r
47 http://www.SafeRTOS.com - A version that is certified for use in safety
\r
50 http://www.OpenRTOS.com - Commercial support, development, porting,
\r
51 licensing and training services.
\r
55 EXTERN usCriticalNesting
\r
57 #include "FreeRTOSConfig.h"
\r
59 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
\r
60 ; Context save and restore macro definitions
\r
61 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
\r
63 portSAVE_CONTEXT MACRO
\r
65 add -0x0C,sp ; prepare stack to save necessary values
\r
66 st.w lp,8[sp] ; store LP to stack
\r
68 st.w lp,4[sp] ; store EIPC to stack
\r
70 st.w lp,0[sp] ; store EIPSW to stack
\r
71 #if configDATA_MODE == 1 ; Using the Tiny data model
\r
72 prepare {r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30},76,sp ; save general purpose registers
\r
89 #else ; Using the Small/Large data model
\r
90 prepare {r20,r21,r22,r23,r24,r26,r27,r28,r29,r30},72,sp ; save general purpose registers
\r
106 #endif /* configDATA_MODE */
\r
109 MOVHI hi1(usCriticalNesting),r0,r1 ; save usCriticalNesting value to stack
\r
110 ld.w lw1(usCriticalNesting)[r1],r2
\r
112 MOVHI hi1(pxCurrentTCB),r0,r1 ; save SP to top of current TCB
\r
113 ld.w lw1(pxCurrentTCB)[r1],r2
\r
118 portRESTORE_CONTEXT MACRO
\r
120 MOVHI hi1(pxCurrentTCB),r0,r1 ; get Stackpointer address
\r
121 ld.w lw1(pxCurrentTCB)[r1],sp
\r
123 ld.w 0[r1],sp ; load stackpointer
\r
124 MOV sp,ep ; set stack pointer to element pointer
\r
125 sld.w 0[ep],r1 ; load usCriticalNesting value from stack
\r
126 MOVHI hi1(usCriticalNesting),r0,r2
\r
127 st.w r1,lw1(usCriticalNesting)[r2]
\r
128 sld.w 4[ep],r1 ; restore general purpose registers
\r
130 #if configDATA_MODE == 1 ; Using Tiny data model
\r
147 dispose 76,{r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30}
\r
148 #else ; Using Small/Large data model
\r
164 dispose 72,{r20,r21,r22,r23,r24,r26,r27,r28,r29,r30}
\r
165 #endif /* configDATA_MODE */
\r
166 ld.w 0[sp],lp ; restore EIPSW from stack
\r
168 ld.w 4[sp],lp ; restore EIPC from stack
\r
170 ld.w 8[sp],lp ; restore LP from stack
\r
171 add 0x0C,sp ; set SP to right position
\r