;/*
;    FreeRTOS V6.0.4 - Copyright (C) 2010 Real Time Engineers Ltd.
;
;    ***************************************************************************
;    *                                                                         *
;    * If you are:                                                             *
;    *                                                                         *
;    *    + New to FreeRTOS,                                                   *
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;    *    + Wanting to improve your FreeRTOS skills and productivity           *
;    *                                                                         *
;    * then take a look at the FreeRTOS eBook                                  *
;    *                                                                         *
;    *        "Using the FreeRTOS Real Time Kernel - a Practical Guide"        *
;    *                  http://www.FreeRTOS.org/Documentation                  *
;    *                                                                         *
;    * A pdf reference manual is also available.  Both are usually delivered   *
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;    *                                                                         *
;    ***************************************************************************
;
;    This file is part of the FreeRTOS distribution.
;
;    FreeRTOS is free software; you can redistribute it and/or modify it under
;    the terms of the GNU General Public License (version 2) as published by the
;    Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
;    ***NOTE*** The exception to the GPL is included to allow you to distribute
;    a combined work that includes FreeRTOS without being obliged to provide the
;    source code for proprietary components outside of the FreeRTOS kernel.
;    FreeRTOS 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 and the FreeRTOS license exception along with FreeRTOS; if not it 
;    can be viewed here: http://www.freertos.org/a00114.html and also obtained 
;    by writing to Richard Barry, contact details for whom are available on the
;    FreeRTOS WEB site.
;
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;
;    http://www.FreeRTOS.org - Documentation, latest information, license and
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;    http://www.SafeRTOS.com - A version that is certified for use in safety
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;*/

	.import _pxCurrentTCB
	.import _vTaskSwitchContext
	.import _vTaskIncrementTick

	.export _vPortStartFirstTask
	.export _ulPortGetGBR
	.export _vPortYieldHandler
	.export _vPortPreemptiveTick
	.export _vPortCooperativeTick
	.export _vPortSaveFlopRegisters
	.export _vPortRestoreFlopRegisters

    .section    P

	.INCLUDE "ISR_Support.inc"
	
_vPortStartFirstTask:
		
	portRESTORE_CONTEXT
	
;-----------------------------------------------------------

_vPortYieldHandler:

	portSAVE_CONTEXT

	mov.l	#_vTaskSwitchContext, r0
	jsr		@r0
	nop

	portRESTORE_CONTEXT
	
;-----------------------------------------------------------

_vPortPreemptiveTick

	portSAVE_CONTEXT
	
	mov.l	#_vTaskIncrementTick, r0
	jsr		@r0
	nop

	mov.l	#_vTaskSwitchContext, r0
	jsr		@r0
	nop

	portRESTORE_CONTEXT
	
;-----------------------------------------------------------

_vPortCooperativeTick

	portSAVE_CONTEXT
	
	mov.l	#_vTaskIncrementTick, r0
	jsr		@r0
	nop

	portRESTORE_CONTEXT
	
;-----------------------------------------------------------

_ulPortGetGBR:

	stc.l	gbr, r0
	rts
	nop

;-----------------------------------------------------------

_vPortSaveFlopRegisters:

	fmov.s	fr0, @-r4
	fmov.s	fr1, @-r4
	fmov.s	fr2, @-r4
	fmov.s	fr3, @-r4
	fmov.s	fr4, @-r4
	fmov.s	fr5, @-r4
	fmov.s	fr6, @-r4
	fmov.s	fr7, @-r4
	fmov.s	fr8, @-r4
	fmov.s	fr9, @-r4
	fmov.s	fr10, @-r4
	fmov.s	fr11, @-r4
	fmov.s	fr12, @-r4
	fmov.s	fr13, @-r4
	fmov.s	fr14, @-r4
	fmov.s	fr15, @-r4	
	sts.l   fpul, @-r4
	sts.l   fpscr, @-r4
	
	rts
	nop

;-----------------------------------------------------------
	
_vPortRestoreFlopRegisters:

	add.l  #-72, r4
	lds.l  @r4+, fpscr
	lds.l  @r4+, fpul	
	fmov.s @r4+, fr15
	fmov.s @r4+, fr14
	fmov.s @r4+, fr13
	fmov.s @r4+, fr12
	fmov.s @r4+, fr11
	fmov.s @r4+, fr10
	fmov.s @r4+, fr9
	fmov.s @r4+, fr8
	fmov.s @r4+, fr7
	fmov.s @r4+, fr6
	fmov.s @r4+, fr5
	fmov.s @r4+, fr4
	fmov.s @r4+, fr3
	fmov.s @r4+, fr2
	fmov.s @r4+, fr1
	fmov.s @r4+, fr0
	
	rts
	nop
	
	.end
		
