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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Source/] [portable/] [Rowley/] [MSP430F449/] [portext.asm] - 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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    * 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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    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 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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    1 tab == 4 spaces!
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    http://www.FreeRTOS.org - Documentation, latest information, license and
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    contact details.
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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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    http://www.OpenRTOS.com - Commercial support, development, porting,
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    licensing and training services.
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*/
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#include "FreeRTOSConfig.h"
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#include "portasm.h"
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.CODE
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/*
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 * The RTOS tick ISR.
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 *
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 * If the cooperative scheduler is in use this simply increments the tick
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 * count.
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 *
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 * If the preemptive scheduler is in use a context switch can also occur.
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 */
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_vTickISR:
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                portSAVE_CONTEXT
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                call    #_vTaskIncrementTick
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                #if configUSE_PREEMPTION == 1
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                        call    #_vTaskSwitchContext
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                #endif
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                portRESTORE_CONTEXT
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/*-----------------------------------------------------------*/
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/*
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 * Manual context switch called by the portYIELD() macro.
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 */
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_vPortYield::
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                /* Mimic an interrupt by pushing the SR. */
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                push    SR
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                /* Now the SR is stacked we can disable interrupts. */
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                dint
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                /* Save the context of the current task. */
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                portSAVE_CONTEXT
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                /* Switch to the highest priority task that is ready to run. */
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                call    #_vTaskSwitchContext
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                /* Restore the context of the new task. */
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                portRESTORE_CONTEXT
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/*-----------------------------------------------------------*/
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/*
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 * Start off the scheduler by initialising the RTOS tick timer, then restoring
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 * the context of the first task.
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 */
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_xPortStartScheduler::
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                /* Setup the hardware to generate the tick.  Interrupts are disabled
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                when this function is called. */
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                call    #_prvSetupTimerInterrupt
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                /* Restore the context of the first task that is going to run. */
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                portRESTORE_CONTEXT
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/*-----------------------------------------------------------*/
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                /* Place the tick ISR in the correct vector. */
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                .VECTORS
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                .KEEP
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                ORG             TIMERA0_VECTOR
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                DW              _vTickISR
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                END
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