2 FreeRTOS V9.0.1 - Copyright (C) 2017 Real Time Engineers Ltd.
\r
5 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
\r
7 This file is part of the FreeRTOS distribution.
\r
9 FreeRTOS is free software; you can redistribute it and/or modify it under
\r
10 the terms of the GNU General Public License (version 2) as published by the
\r
11 Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
\r
13 ***************************************************************************
\r
14 >>! NOTE: The modification to the GPL is included to allow you to !<<
\r
15 >>! distribute a combined work that includes FreeRTOS without being !<<
\r
16 >>! obliged to provide the source code for proprietary components !<<
\r
17 >>! outside of the FreeRTOS kernel. !<<
\r
18 ***************************************************************************
\r
20 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
\r
21 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
\r
22 FOR A PARTICULAR PURPOSE. Full license text is available on the following
\r
23 link: http://www.freertos.org/a00114.html
\r
25 ***************************************************************************
\r
27 * FreeRTOS provides completely free yet professionally developed, *
\r
28 * robust, strictly quality controlled, supported, and cross *
\r
29 * platform software that is more than just the market leader, it *
\r
30 * is the industry's de facto standard. *
\r
32 * Help yourself get started quickly while simultaneously helping *
\r
33 * to support the FreeRTOS project by purchasing a FreeRTOS *
\r
34 * tutorial book, reference manual, or both: *
\r
35 * http://www.FreeRTOS.org/Documentation *
\r
37 ***************************************************************************
\r
39 http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
\r
40 the FAQ page "My application does not run, what could be wrong?". Have you
\r
41 defined configASSERT()?
\r
43 http://www.FreeRTOS.org/support - In return for receiving this top quality
\r
44 embedded software for free we request you assist our global community by
\r
45 participating in the support forum.
\r
47 http://www.FreeRTOS.org/training - Investing in training allows your team to
\r
48 be as productive as possible as early as possible. Now you can receive
\r
49 FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
\r
50 Ltd, and the world's leading authority on the world's leading RTOS.
\r
52 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
\r
53 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
\r
54 compatible FAT file system, and our tiny thread aware UDP/IP stack.
\r
56 http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
\r
57 Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
\r
59 http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
\r
60 Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
\r
61 licenses offer ticketed support, indemnification and commercial middleware.
\r
63 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
\r
64 engineered and independently SIL3 certified version for use in safety and
\r
65 mission critical applications that require provable dependability.
\r
71 EXTERN usCriticalNesting
\r
73 #include "FreeRTOSConfig.h"
\r
75 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
\r
76 ; Context save and restore macro definitions
\r
77 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
\r
79 portSAVE_CONTEXT MACRO
\r
81 add -0x0C,sp ; prepare stack to save necessary values
\r
82 st.w lp,8[sp] ; store LP to stack
\r
84 st.w lp,4[sp] ; store EIPC to stack
\r
86 st.w lp,0[sp] ; store EIPSW to stack
\r
87 #if configDATA_MODE == 1 ; Using the Tiny data model
\r
88 prepare {r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30},76,sp ; save general purpose registers
\r
105 #else ; Using the Small/Large data model
\r
106 prepare {r20,r21,r22,r23,r24,r26,r27,r28,r29,r30},72,sp ; save general purpose registers
\r
122 #endif /* configDATA_MODE */
\r
125 MOVHI hi1(usCriticalNesting),r0,r1 ; save usCriticalNesting value to stack
\r
126 ld.w lw1(usCriticalNesting)[r1],r2
\r
128 MOVHI hi1(pxCurrentTCB),r0,r1 ; save SP to top of current TCB
\r
129 ld.w lw1(pxCurrentTCB)[r1],r2
\r
134 portRESTORE_CONTEXT MACRO
\r
136 MOVHI hi1(pxCurrentTCB),r0,r1 ; get Stackpointer address
\r
137 ld.w lw1(pxCurrentTCB)[r1],sp
\r
139 ld.w 0[r1],sp ; load stackpointer
\r
140 MOV sp,ep ; set stack pointer to element pointer
\r
141 sld.w 0[ep],r1 ; load usCriticalNesting value from stack
\r
142 MOVHI hi1(usCriticalNesting),r0,r2
\r
143 st.w r1,lw1(usCriticalNesting)[r2]
\r
144 sld.w 4[ep],r1 ; restore general purpose registers
\r
146 #if configDATA_MODE == 1 ; Using Tiny data model
\r
163 dispose 76,{r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30}
\r
164 #else ; Using Small/Large data model
\r
180 dispose 72,{r20,r21,r22,r23,r24,r26,r27,r28,r29,r30}
\r
181 #endif /* configDATA_MODE */
\r
182 ld.w 0[sp],lp ; restore EIPSW from stack
\r
184 ld.w 4[sp],lp ; restore EIPC from stack
\r
186 ld.w 8[sp],lp ; restore LP from stack
\r
187 add 0x0C,sp ; set SP to right position
\r