/* FreeRTOS V7.5.0 - Copyright (C) 2013 Real Time Engineers Ltd. VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. *************************************************************************** * * * FreeRTOS provides completely free yet professionally developed, * * robust, strictly quality controlled, supported, and cross * * platform software that has become a de facto standard. * * * * Help yourself get started quickly and support the FreeRTOS * * project by purchasing a FreeRTOS tutorial book, reference * * manual, or both from: http://www.FreeRTOS.org/Documentation * * * * Thank you! * * * *************************************************************************** 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. Full license text is available from the following link: http://www.freertos.org/a00114.html 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, books, training, latest versions, license and Real Time Engineers Ltd. contact details. http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, including FreeRTOS+Trace - an indispensable productivity tool, a DOS compatible FAT file system, and our tiny thread aware UDP/IP stack. http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS licenses offer ticketed support, indemnification and middleware. http://www.SafeRTOS.com - High Integrity Systems also provide a safety engineered and independently SIL3 certified version for use in safety and mission critical applications that require provable dependability. 1 tab == 4 spaces! */ 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