2 FreeRTOS.org V5.1.1 - Copyright (C) 2003-2008 Richard Barry.
\r
4 This file is part of the FreeRTOS distribution.
\r
6 FreeRTOS is free software; you can redistribute it and/or modify
\r
7 it under the terms of the GNU General Public License as published by
\r
8 the Free Software Foundation; either version 2 of the License, or
\r
9 (at your option) any later version.
\r
11 FreeRTOS is distributed in the hope that it will be useful,
\r
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
\r
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
\r
14 GNU General Public License for more details.
\r
16 You should have received a copy of the GNU General Public License
\r
17 along with FreeRTOS; if not, write to the Free Software
\r
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
\r
20 A special exception to the GPL can be applied should you wish to distribute
\r
21 a combined work that includes FreeRTOS, without being obliged to provide
\r
22 the source code for any proprietary components. See the licensing section
\r
23 of http://www.FreeRTOS.org for full details of how and when the exception
\r
26 ***************************************************************************
\r
27 ***************************************************************************
\r
29 * SAVE TIME AND MONEY! We can port FreeRTOS.org to your own hardware, *
\r
30 * and even write all or part of your application on your behalf. *
\r
31 * See http://www.OpenRTOS.com for details of the services we provide to *
\r
32 * expedite your project. *
\r
34 ***************************************************************************
\r
35 ***************************************************************************
\r
37 Please ensure to read the configuration and relevant port sections of the
\r
38 online documentation.
\r
40 http://www.FreeRTOS.org - Documentation, latest information, license and
\r
43 http://www.SafeRTOS.com - A version that is certified for use in safety
\r
46 http://www.OpenRTOS.com - Commercial support, development, porting,
\r
47 licensing and training services.
\r
51 EXTERN usCriticalNesting
\r
53 #include "FreeRTOSConfig.h"
\r
55 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
\r
56 ; Context save and restore macro definitions
\r
57 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
\r
59 portSAVE_CONTEXT MACRO
\r
61 add -0x0C,sp ; prepare stack to save necessary values
\r
62 st.w lp,8[sp] ; store LP to stack
\r
64 st.w lp,4[sp] ; store EIPC to stack
\r
66 st.w lp,0[sp] ; store EIPSW to stack
\r
67 #if configDATA_MODE == 1 ; Using the Tiny data model
\r
68 prepare {r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30},76,sp ; save general purpose registers
\r
85 #else ; Using the Small/Large data model
\r
86 prepare {r20,r21,r22,r23,r24,r26,r27,r28,r29,r30},72,sp ; save general purpose registers
\r
102 #endif /* configDATA_MODE */
\r
105 MOVHI hi1(usCriticalNesting),r0,r1 ; save usCriticalNesting value to stack
\r
106 ld.w lw1(usCriticalNesting)[r1],r2
\r
108 MOVHI hi1(pxCurrentTCB),r0,r1 ; save SP to top of current TCB
\r
109 ld.w lw1(pxCurrentTCB)[r1],r2
\r
114 portRESTORE_CONTEXT MACRO
\r
116 MOVHI hi1(pxCurrentTCB),r0,r1 ; get Stackpointer address
\r
117 ld.w lw1(pxCurrentTCB)[r1],sp
\r
119 ld.w 0[r1],sp ; load stackpointer
\r
120 MOV sp,ep ; set stack pointer to element pointer
\r
121 sld.w 0[ep],r1 ; load usCriticalNesting value from stack
\r
122 MOVHI hi1(usCriticalNesting),r0,r2
\r
123 st.w r1,lw1(usCriticalNesting)[r2]
\r
124 sld.w 4[ep],r1 ; restore general purpose registers
\r
126 #if configDATA_MODE == 1 ; Using Tiny data model
\r
143 dispose 76,{r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30}
\r
144 #else ; Using Small/Large data model
\r
160 dispose 72,{r20,r21,r22,r23,r24,r26,r27,r28,r29,r30}
\r
161 #endif /* configDATA_MODE */
\r
162 ld.w 0[sp],lp ; restore EIPSW from stack
\r
164 ld.w 4[sp],lp ; restore EIPC from stack
\r
166 ld.w 8[sp],lp ; restore LP from stack
\r
167 add 0x0C,sp ; set SP to right position
\r