mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
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188 lines
7.3 KiB
C
188 lines
7.3 KiB
C
/*
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FreeRTOS V8.1.2 - Copyright (C) 2014 Real Time Engineers Ltd.
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All rights reserved
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VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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***************************************************************************
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* *
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* FreeRTOS provides completely free yet professionally developed, *
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* robust, strictly quality controlled, supported, and cross *
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* platform software that has become a de facto standard. *
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* *
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* Help yourself get started quickly and support the FreeRTOS *
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* project by purchasing a FreeRTOS tutorial book, reference *
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* manual, or both from: http://www.FreeRTOS.org/Documentation *
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* *
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* Thank you! *
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* *
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***************************************************************************
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This file is part of the FreeRTOS distribution.
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FreeRTOS is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License (version 2) as published by the
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Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
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>>! NOTE: The modification to the GPL is included to allow you to !<<
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>>! distribute a combined work that includes FreeRTOS without being !<<
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>>! obliged to provide the source code for proprietary components !<<
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>>! outside of the FreeRTOS kernel. !<<
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FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. Full license text is available from the following
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link: http://www.freertos.org/a00114.html
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1 tab == 4 spaces!
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***************************************************************************
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* *
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* Having a problem? Start by reading the FAQ "My application does *
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* not run, what could be wrong?" *
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* *
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* http://www.FreeRTOS.org/FAQHelp.html *
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* *
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***************************************************************************
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http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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license and Real Time Engineers Ltd. contact details.
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http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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compatible FAT file system, and our tiny thread aware UDP/IP stack.
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http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
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licenses offer ticketed support, indemnification and middleware.
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http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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engineered and independently SIL3 certified version for use in safety and
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mission critical applications that require provable dependability.
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1 tab == 4 spaces!
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*/
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EXTERN pxCurrentTCB
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EXTERN usCriticalNesting
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#include "FreeRTOSConfig.h"
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; Context save and restore macro definitions
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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portSAVE_CONTEXT MACRO
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add -0x0C,sp ; prepare stack to save necessary values
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st.w lp,8[sp] ; store LP to stack
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stsr 0,r31
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st.w lp,4[sp] ; store EIPC to stack
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stsr 1,lp
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st.w lp,0[sp] ; store EIPSW to stack
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#if configDATA_MODE == 1 ; Using the Tiny data model
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prepare {r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30},76,sp ; save general purpose registers
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sst.w r19,72[ep]
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sst.w r18,68[ep]
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sst.w r17,64[ep]
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sst.w r16,60[ep]
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sst.w r15,56[ep]
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sst.w r14,52[ep]
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sst.w r13,48[ep]
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sst.w r12,44[ep]
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sst.w r11,40[ep]
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sst.w r10,36[ep]
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sst.w r9,32[ep]
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sst.w r8,28[ep]
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sst.w r7,24[ep]
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sst.w r6,20[ep]
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sst.w r5,16[ep]
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sst.w r4,12[ep]
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#else ; Using the Small/Large data model
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prepare {r20,r21,r22,r23,r24,r26,r27,r28,r29,r30},72,sp ; save general purpose registers
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sst.w r19,68[ep]
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sst.w r18,64[ep]
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sst.w r17,60[ep]
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sst.w r16,56[ep]
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sst.w r15,52[ep]
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sst.w r14,48[ep]
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sst.w r13,44[ep]
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sst.w r12,40[ep]
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sst.w r11,36[ep]
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sst.w r10,32[ep]
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sst.w r9,28[ep]
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sst.w r8,24[ep]
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sst.w r7,20[ep]
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sst.w r6,16[ep]
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sst.w r5,12[ep]
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#endif /* configDATA_MODE */
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sst.w r2,8[ep]
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sst.w r1,4[ep]
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MOVHI hi1(usCriticalNesting),r0,r1 ; save usCriticalNesting value to stack
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ld.w lw1(usCriticalNesting)[r1],r2
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sst.w r2,0[ep]
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MOVHI hi1(pxCurrentTCB),r0,r1 ; save SP to top of current TCB
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ld.w lw1(pxCurrentTCB)[r1],r2
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st.w sp,0[r2]
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ENDM
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portRESTORE_CONTEXT MACRO
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MOVHI hi1(pxCurrentTCB),r0,r1 ; get Stackpointer address
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ld.w lw1(pxCurrentTCB)[r1],sp
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MOV sp,r1
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ld.w 0[r1],sp ; load stackpointer
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MOV sp,ep ; set stack pointer to element pointer
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sld.w 0[ep],r1 ; load usCriticalNesting value from stack
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MOVHI hi1(usCriticalNesting),r0,r2
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st.w r1,lw1(usCriticalNesting)[r2]
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sld.w 4[ep],r1 ; restore general purpose registers
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sld.w 8[ep],r2
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#if configDATA_MODE == 1 ; Using Tiny data model
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sld.w 12[ep],r4
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sld.w 16[ep],r5
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sld.w 20[ep],r6
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sld.w 24[ep],r7
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sld.w 28[ep],r8
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sld.w 32[ep],r9
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sld.w 36[ep],r10
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sld.w 40[ep],r11
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sld.w 44[ep],r12
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sld.w 48[ep],r13
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sld.w 52[ep],r14
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sld.w 56[ep],r15
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sld.w 60[ep],r16
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sld.w 64[ep],r17
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sld.w 68[ep],r18
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sld.w 72[ep],r19
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dispose 76,{r20,r21,r22,r23,r24,r25,r26,r27,r28,r29,r30}
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#else ; Using Small/Large data model
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sld.w 12[ep],r5
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sld.w 16[ep],r6
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sld.w 20[ep],r7
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sld.w 24[ep],r8
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sld.w 28[ep],r9
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sld.w 32[ep],r10
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sld.w 36[ep],r11
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sld.w 40[ep],r12
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sld.w 44[ep],r13
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sld.w 48[ep],r14
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sld.w 52[ep],r15
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sld.w 56[ep],r16
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sld.w 60[ep],r17
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sld.w 64[ep],r18
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sld.w 68[ep],r19
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dispose 72,{r20,r21,r22,r23,r24,r26,r27,r28,r29,r30}
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#endif /* configDATA_MODE */
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ld.w 0[sp],lp ; restore EIPSW from stack
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ldsr lp,1
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ld.w 4[sp],lp ; restore EIPC from stack
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ldsr lp,0
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ld.w 8[sp],lp ; restore LP from stack
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add 0x0C,sp ; set SP to right position
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RETI
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ENDM
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