Source/portable/IAR/STR75x/portasm.s79

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+;	FreeRTOS.org V4.1.2 - Copyright (C) 2003-2006 Richard Barry.
+;
+;	This file is part of the FreeRTOS.org distribution.
+;
+;	FreeRTOS.org is free software; you can redistribute it and/or modify
+;	it under the terms of the GNU General Public License as published by
+;	the Free Software Foundation; either version 2 of the License, or
+;	(at your option) any later version.
+;
+;	FreeRTOS.org is distributed in the hope that it will be useful,
+;	but WITHOUT ANY WARRANTY; without even the implied warranty of
+;	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;	GNU General Public License for more details.
+;
+;	You should have received a copy of the GNU General Public License
+;	along with FreeRTOS.org; if not, write to the Free Software
+;	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+;
+;	A special exception to the GPL can be applied should you wish to distribute
+;	a combined work that includes FreeRTOS.org, without being obliged to provide
+;	the source code for any proprietary components.  See the licensing section
+;	of http://www.FreeRTOS.org for full details of how and when the exception
+;	can be applied.
+;
+;	***************************************************************************
+;	See http://www.FreeRTOS.org for documentation, latest information, license
+;	and contact details.  Please ensure to read the configuration and relevant
+;	port sections of the online documentation.
+;	***************************************************************************
+
+	RSEG ICODE:CODE
+	CODE32
+
+	EXTERN vPortPreemptiveTick
+	EXTERN vTaskSwitchContext
+
+	PUBLIC vPortYieldProcessor
+	PUBLIC vPortStartFirstTask
+
+#include "ISR_Support.h"
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+; Starting the first task is just a matter of restoring the context that
+; was created by pxPortInitialiseStack().
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+vPortStartFirstTask:
+	portRESTORE_CONTEXT
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+; Manual context switch function.  This is the SWI hander.
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+vPortYieldProcessor:
+	ADD		LR, LR, #4			; Add 4 to the LR to make the LR appear exactly
+								; as if the context was saved during and IRQ
+								; handler.
+								
+	portSAVE_CONTEXT			; Save the context of the current task...
+	LDR R0, =vTaskSwitchContext	; before selecting the next task to execute.
+	mov     lr, pc
+	BX R0
+	portRESTORE_CONTEXT			; Restore the context of the selected task.
+
+
+
+	END
+