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jeremybenn |
;/*
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; FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.
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;
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; ***************************************************************************
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; * *
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; * If you are: *
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; * *
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; * + New to FreeRTOS, *
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; * + Wanting to learn FreeRTOS or multitasking in general quickly *
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; * + Looking for basic training, *
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; * + Wanting to improve your FreeRTOS skills and productivity *
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; * *
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; * then take a look at the FreeRTOS books - available as PDF or paperback *
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; * *
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; * "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
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; * http://www.FreeRTOS.org/Documentation *
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; * *
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; * A pdf reference manual is also available. Both are usually delivered *
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; * to your inbox within 20 minutes to two hours when purchased between 8am *
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; * and 8pm GMT (although please allow up to 24 hours in case of *
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; * exceptional circumstances). Thank you for your support! *
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; * *
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; ***************************************************************************
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;
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; This file is part of the FreeRTOS distribution.
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;
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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 exception to the GPL is included to allow you to distribute
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; a combined work that includes FreeRTOS without being obliged to provide the
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; source code for proprietary components outside of the FreeRTOS kernel.
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; FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
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; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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; more details. You should have received a copy of the GNU General Public
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; License and the FreeRTOS license exception along with FreeRTOS; if not it
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; can be viewed here: http://www.freertos.org/a00114.html and also obtained
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; by writing to Richard Barry, contact details for whom are available on the
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; FreeRTOS WEB site.
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;
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; 1 tab == 4 spaces!
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;
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; http://www.FreeRTOS.org - Documentation, latest information, license and
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; contact details.
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;
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; http://www.SafeRTOS.com - A version that is certified for use in safety
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; critical systems.
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;
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; http://www.OpenRTOS.com - Commercial support, development, porting,
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; licensing and training services.
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;*/
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; Note: Select the correct include files for the device used by the application.
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#include "FreeRTOSConfig.h"
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;------------------------------------------------------------------------------
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; Functions used by scheduler
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;------------------------------------------------------------------------------
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EXTERN vTaskSwitchContext
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EXTERN vTaskIncrementTick
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; Variables used by scheduler
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;------------------------------------------------------------------------------
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EXTERN pxCurrentTCB
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EXTERN usCriticalNesting
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; Functions implemented in this file
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;------------------------------------------------------------------------------
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PUBLIC vPortYield
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PUBLIC vPortStart
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; Security ID definition
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;------------------------------------------------------------------------------
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#define CG_SECURITY0 0FFH
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#define CG_SECURITY1 0FFH
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#define CG_SECURITY2 0FFH
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#define CG_SECURITY3 0FFH
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#define CG_SECURITY4 0FFH
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#define CG_SECURITY5 0FFH
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#define CG_SECURITY6 0FFH
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#define CG_SECURITY7 0FFH
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#define CG_SECURITY8 0FFH
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#define CG_SECURITY9 0FFH
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; Option Byte definitions
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;------------------------------------------------------------------------------
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#define CG_OPTION7A 0x00
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#define CG_OPTION7B 0x04
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#define OPT7C 0x00
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#define OPT7D 0x00
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#define OPT7E 0x00
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#define OPT7F 0x00
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; Tick ISR Prototype
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;------------------------------------------------------------------------------
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PUBWEAK `??MD_INTTM0EQ0??INTVEC 608`
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PUBLIC MD_INTTM0EQ0
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MD_INTTM0EQ0 SYMBOL "MD_INTTM0EQ0"
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`??MD_INTTM0EQ0??INTVEC 608` SYMBOL "??INTVEC 608", MD_INTTM0EQ0
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;------------------------------------------------------------------------------
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; portSAVE_CONTEXT MACRO
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; Saves the context of the remaining general purpose registers
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; and the usCriticalNesting Value of the active Task onto the task stack
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; saves stack pointer to the TCB
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;------------------------------------------------------------------------------
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portSAVE_CONTEXT MACRO
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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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;------------------------------------------------------------------------------
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;------------------------------------------------------------------------------
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; portRESTORE_CONTEXT MACRO
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; Gets stack pointer from the current TCB
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; Restores the context of the usCriticalNesting value and general purpose
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; registers of the selected task from the task stack
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;------------------------------------------------------------------------------
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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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ENDM
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;------------------------------------------------------------------------------
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;------------------------------------------------------------------------------
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; Restore the context of the first task that is going to run.
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;
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; Input: NONE
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;
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; Call: CALL vPortStart
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;
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; Output: NONE
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;------------------------------------------------------------------------------
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RSEG CODE:CODE
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vPortStart:
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portRESTORE_CONTEXT ; Restore the context of whichever task the ...
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ld.w 0[sp],lp
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ldsr lp,5 ; restore PSW
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DI
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ld.w 4[sp],lp ; restore LP
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ld.w 8[sp],lp ; restore LP
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ADD 0x0C,sp ; set SP to right position
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EI
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jmp [lp]
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;------------------------------------------------------------------------------
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;------------------------------------------------------------------------------
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; Port Yield function to check for a Task switch in the cooperative and
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; preemptive mode
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;
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; Input: NONE
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;
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; Call: CALL vPortYield
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;
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; Output: NONE
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;------------------------------------------------------------------------------
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RSEG CODE:CODE
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vPortYield:
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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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portSAVE_CONTEXT ; Save the context of the current task.
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jarl vTaskSwitchContext,lp ; Call the scheduler.
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portRESTORE_CONTEXT ; Restore the context of whichever task the ...
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; ... scheduler decided should run.
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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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;------------------------------------------------------------------------------
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;------------------------------------------------------------------------------
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; Perform the necessary steps of the Tick Count Increment and Task Switch
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; depending on the chosen kernel configuration
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;
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; Input: NONE
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;
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; Call: ISR
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;
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; Output: NONE
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;------------------------------------------------------------------------------
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#if configUSE_PREEMPTION == 1 ; use preemptive kernel mode
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MD_INTTM0EQ0:
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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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| 287 |
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stsr 1,lp
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| 288 |
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st.w lp,0[sp] ; store EIPSW to stack
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| 289 |
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portSAVE_CONTEXT ; Save the context of the current task.
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jarl vTaskIncrementTick,lp ; Call the timer tick function.
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jarl vTaskSwitchContext,lp ; Call the scheduler.
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portRESTORE_CONTEXT ; Restore the context of whichever task the ...
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; ... scheduler decided should run.
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ld.w 0[sp],lp ; restore EIPSW from stack
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ldsr lp,1
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| 296 |
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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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;------------------------------------------------------------------------------
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#else ; use cooperative kernel mode
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MD_INTTM0EQ0:
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prepare {lp,ep},8,sp
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sst.w r1,4[ep]
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sst.w r5,0[ep]
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| 309 |
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jarl vTaskIncrementTick,lp ; Call the timer tick function.
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sld.w 0[ep],r5
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sld.w 4[ep],r1
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dispose 8,{lp,ep}
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RETI
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#endif /* configUSE_PREEMPTION */
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;------------------------------------------------------------------------------
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| 317 |
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COMMON INTVEC:CODE:ROOT(2)
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| 318 |
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ORG 608
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| 319 |
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`??MD_INTTM0EQ0??INTVEC 608`:
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| 320 |
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JR MD_INTTM0EQ0
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| 321 |
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| 322 |
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RSEG NEAR_ID:CONST:SORT:NOROOT(2)
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| 323 |
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`?`:
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| 324 |
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DW 10
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| 325 |
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| 326 |
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|
COMMON INTVEC:CODE:ROOT(2)
|
| 327 |
|
|
ORG 40H
|
| 328 |
|
|
`??vPortYield??INTVEC 40`:
|
| 329 |
|
|
JR vPortYield
|
| 330 |
|
|
|
| 331 |
|
|
;------------------------------------------------------------------------------
|
| 332 |
|
|
; set microcontroller security ID
|
| 333 |
|
|
|
| 334 |
|
|
COMMON INTVEC:CODE:ROOT(2)
|
| 335 |
|
|
ORG 70H
|
| 336 |
|
|
`SECUID`:
|
| 337 |
|
|
DB CG_SECURITY0
|
| 338 |
|
|
DB CG_SECURITY1
|
| 339 |
|
|
DB CG_SECURITY2
|
| 340 |
|
|
DB CG_SECURITY3
|
| 341 |
|
|
DB CG_SECURITY4
|
| 342 |
|
|
DB CG_SECURITY5
|
| 343 |
|
|
DB CG_SECURITY6
|
| 344 |
|
|
DB CG_SECURITY7
|
| 345 |
|
|
DB CG_SECURITY8
|
| 346 |
|
|
DB CG_SECURITY9
|
| 347 |
|
|
|
| 348 |
|
|
;------------------------------------------------------------------------------
|
| 349 |
|
|
; set microcontroller option bytes
|
| 350 |
|
|
|
| 351 |
|
|
COMMON INTVEC:CODE:ROOT(2)
|
| 352 |
|
|
ORG 7AH
|
| 353 |
|
|
`OPTBYTES`:
|
| 354 |
|
|
DB CG_OPTION7A
|
| 355 |
|
|
DB CG_OPTION7B
|
| 356 |
|
|
DB OPT7C
|
| 357 |
|
|
DB OPT7D
|
| 358 |
|
|
DB OPT7E
|
| 359 |
|
|
DB OPT7F
|
| 360 |
|
|
|
| 361 |
|
|
END
|
