/* FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd. *************************************************************************** * * * FreeRTOS tutorial books are available in pdf and paperback. * * Complete, revised, and edited pdf reference manuals are also * * available. * * * * Purchasing FreeRTOS documentation will not only help you, by * * ensuring you get running as quickly as possible and with an * * in-depth knowledge of how to use FreeRTOS, it will also help * * the FreeRTOS project to continue with its mission of providing * * professional grade, cross platform, de facto standard solutions * * for microcontrollers - completely free of charge! * * * * >>> See http://www.FreeRTOS.org/Documentation for details. <<< * * * * Thank you for using FreeRTOS, and thank you for your support! * * * *************************************************************************** This file is part of the FreeRTOS distribution. FreeRTOS is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License (version 2) as published by the Free Software Foundation AND MODIFIED BY the FreeRTOS exception. >>>NOTE<<< The modification to the GPL is included to allow you to distribute a combined work that includes FreeRTOS without being obliged to provide the source code for proprietary components outside of the FreeRTOS kernel. FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License and the FreeRTOS license exception along with FreeRTOS; if not it can be viewed here: http://www.freertos.org/a00114.html and also obtained by writing to Richard Barry, contact details for whom are available on the FreeRTOS WEB site. 1 tab == 4 spaces! *************************************************************************** * * * Having a problem? Start by reading the FAQ "My application does * * not run, what could be wrong? * * * * http://www.FreeRTOS.org/FAQHelp.html * * * *************************************************************************** http://www.FreeRTOS.org - Documentation, training, latest information, license and contact details. http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, including FreeRTOS+Trace - an indispensable productivity tool. Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell the code with commercial support, indemnification, and middleware, under the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also provide a safety engineered and independently SIL3 certified version under the SafeRTOS brand: http://www.SafeRTOS.com. */ EXTERN pxCurrentTCB EXTERN usCriticalNesting #include "FreeRTOSConfig.h" ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ; Context save and restore macro definitions ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; portSAVE_CONTEXT MACRO add -0x0C,sp ; prepare stack to save necessary values st.w lp,8[sp] ; store LP to stack stsr 0,r31 st.w lp,4[sp] ; store EIPC to stack stsr 1,lp st.w lp,0[sp] ; store EIPSW to stack #if configDATA_MODE == 1 ; Using the Tiny data model prepare {r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30},76,sp ; save general purpose registers sst.w r19,72[ep] sst.w r18,68[ep] sst.w r17,64[ep] sst.w r16,60[ep] sst.w r15,56[ep] sst.w r14,52[ep] sst.w r13,48[ep] sst.w r12,44[ep] sst.w r11,40[ep] sst.w r10,36[ep] sst.w r9,32[ep] sst.w r8,28[ep] sst.w r7,24[ep] sst.w r6,20[ep] sst.w r5,16[ep] sst.w r4,12[ep] #else ; Using the Small/Large data model prepare {r20,r21,r22,r23,r24,r26,r27,r28,r29,r30},72,sp ; save general purpose registers sst.w r19,68[ep] sst.w r18,64[ep] sst.w r17,60[ep] sst.w r16,56[ep] sst.w r15,52[ep] sst.w r14,48[ep] sst.w r13,44[ep] sst.w r12,40[ep] sst.w r11,36[ep] sst.w r10,32[ep] sst.w r9,28[ep] sst.w r8,24[ep] sst.w r7,20[ep] sst.w r6,16[ep] sst.w r5,12[ep] #endif /* configDATA_MODE */ sst.w r2,8[ep] sst.w r1,4[ep] MOVHI hi1(usCriticalNesting),r0,r1 ; save usCriticalNesting value to stack ld.w lw1(usCriticalNesting)[r1],r2 sst.w r2,0[ep] MOVHI hi1(pxCurrentTCB),r0,r1 ; save SP to top of current TCB ld.w lw1(pxCurrentTCB)[r1],r2 st.w sp,0[r2] ENDM portRESTORE_CONTEXT MACRO MOVHI hi1(pxCurrentTCB),r0,r1 ; get Stackpointer address ld.w lw1(pxCurrentTCB)[r1],sp MOV sp,r1 ld.w 0[r1],sp ; load stackpointer MOV sp,ep ; set stack pointer to element pointer sld.w 0[ep],r1 ; load usCriticalNesting value from stack MOVHI hi1(usCriticalNesting),r0,r2 st.w r1,lw1(usCriticalNesting)[r2] sld.w 4[ep],r1 ; restore general purpose registers sld.w 8[ep],r2 #if configDATA_MODE == 1 ; Using Tiny data model sld.w 12[ep],r4 sld.w 16[ep],r5 sld.w 20[ep],r6 sld.w 24[ep],r7 sld.w 28[ep],r8 sld.w 32[ep],r9 sld.w 36[ep],r10 sld.w 40[ep],r11 sld.w 44[ep],r12 sld.w 48[ep],r13 sld.w 52[ep],r14 sld.w 56[ep],r15 sld.w 60[ep],r16 sld.w 64[ep],r17 sld.w 68[ep],r18 sld.w 72[ep],r19 dispose 76,{r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30} #else ; Using Small/Large data model sld.w 12[ep],r5 sld.w 16[ep],r6 sld.w 20[ep],r7 sld.w 24[ep],r8 sld.w 28[ep],r9 sld.w 32[ep],r10 sld.w 36[ep],r11 sld.w 40[ep],r12 sld.w 44[ep],r13 sld.w 48[ep],r14 sld.w 52[ep],r15 sld.w 56[ep],r16 sld.w 60[ep],r17 sld.w 64[ep],r18 sld.w 68[ep],r19 dispose 72,{r20,r21,r22,r23,r24,r26,r27,r28,r29,r30} #endif /* configDATA_MODE */ ld.w 0[sp],lp ; restore EIPSW from stack ldsr lp,1 ld.w 4[sp],lp ; restore EIPC from stack ldsr lp,0 ld.w 8[sp],lp ; restore LP from stack add 0x0C,sp ; set SP to right position RETI ENDM