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;/*
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; FreeRTOS.org V5.3.1 - Copyright (C) 2003-2009 Richard Barry.
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;
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; This file is part of the FreeRTOS.org distribution.
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;
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; FreeRTOS.org is free software; you can redistribute it and/or modify it
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; under the terms of the GNU General Public License (version 2) as published
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; by the 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 a
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; combined work that includes FreeRTOS.org without being obliged to provide
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; the source code for any proprietary components. Alternative commercial
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; license and support terms are also available upon request. See the
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; licensing section of http://www.FreeRTOS.org for full details.
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;
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; FreeRTOS.org 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.
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;
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; You should have received a copy of the GNU General Public License along
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; with FreeRTOS.org; if not, write to the Free Software Foundation, Inc., 59
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; Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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;
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;
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; ***************************************************************************
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; * *
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; * Get the FreeRTOS eBook! See http://www.FreeRTOS.org/Documentation *
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; * *
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; * This is a concise, step by step, 'hands on' guide that describes both *
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; * general multitasking concepts and FreeRTOS specifics. It presents and *
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; * explains numerous examples that are written using the FreeRTOS API. *
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; * Full source code for all the examples is provided in an accompanying *
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; * .zip file. *
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; * *
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; ***************************************************************************
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;
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; 1 tab == 4 spaces!
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;
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; Please ensure to read the configuration and relevant port sections of the
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; online documentation.
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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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INCLUDE portmacro.inc
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;The UART interrupt entry point is defined within an assembly wrapper
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;within this file. This takes care of the task context saving before it
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;calls the main handler (vUART_ISRHandler()) which is written in C within
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;serial.c. The execution of the handler can unblock tasks that were blocked
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;waiting for UART events. Once the handler completes the asm wrapper
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;finishes off by restoring the context of whichever task is now selected to
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;enter the RUNNING state (which might now be a different task to that which
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;was originally interrupted.
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IMPORT vUART_ISRHandler
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EXPORT vUART_ISREntry
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;/* Interrupt entry must always be in ARM mode. */
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ARM
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AREA |.text|, CODE, READONLY
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vUART_ISREntry
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PRESERVE8
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; Save the context of the interrupted task.
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portSAVE_CONTEXT
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; Call the C handler function - defined within serial.c.
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LDR R0, =vUART_ISRHandler
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MOV LR, PC
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BX R0
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; Finish off by restoring the context of the task that has been chosen to
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; run next - which might be a different task to that which was originally
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; interrupted.
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portRESTORE_CONTEXT
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END
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