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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Source/] [portable/] [IAR/] [STR75x/] [portasm.s79] - Blame information for rev 582

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1 572 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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        RSEG ICODE:CODE
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        CODE32
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        EXTERN vPortPreemptiveTick
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        EXTERN vTaskSwitchContext
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        PUBLIC vPortYieldProcessor
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        PUBLIC vPortStartFirstTask
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#include "ISR_Support.h"
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; Starting the first task is just a matter of restoring the context that
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; was created by pxPortInitialiseStack().
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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vPortStartFirstTask:
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        portRESTORE_CONTEXT
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; Manual context switch function.  This is the SWI hander.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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vPortYieldProcessor:
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        ADD             LR, LR, #4                      ; Add 4 to the LR to make the LR appear exactly
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                                                                ; as if the context was saved during and IRQ
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                                                                ; handler.
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        portSAVE_CONTEXT                        ; Save the context of the current task...
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        LDR R0, =vTaskSwitchContext     ; before selecting the next task to execute.
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        mov     lr, pc
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        BX R0
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        portRESTORE_CONTEXT                     ; Restore the context of the selected task.
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        END
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