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New port files for V2 ColdFire/CodeWarrior added.

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Richard Barry 2008-10-17 13:18:49 +00:00
parent 40f4287921
commit 5e89d113be
3 changed files with 453 additions and 0 deletions
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Source/portable/CodeWarrior/ColdFire_V2/port.c Normal file
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/*
FreeRTOS.org V5.0.4 - Copyright (C) 2003-2008 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.
***************************************************************************
***************************************************************************
* *
* SAVE TIME AND MONEY! We can port FreeRTOS.org to your own hardware, *
* and even write all or part of your application on your behalf. *
* See http://www.OpenRTOS.com for details of the services we provide to *
* expedite your project. *
* *
***************************************************************************
***************************************************************************
Please ensure to read the configuration and relevant port sections of the
online documentation.
http://www.FreeRTOS.org - Documentation, latest information, license and
contact details.
http://www.SafeRTOS.com - A version that is certified for use in safety
critical systems.
http://www.OpenRTOS.com - Commercial support, development, porting,
licensing and training services.
*/
/* Kernel includes. */
#include "FreeRTOS.h"
#include "task.h"
#define portINITIAL_FORMAT_VECTOR ( ( portSTACK_TYPE ) 0x4000 )
/* Supervisor mode set. */
#define portINITIAL_STATUS_REGISTER ( ( portSTACK_TYPE ) 0x2000)
/* Used to keep track of the number of nested calls to taskENTER_CRITICAL(). This
will be set to 0 prior to the first task being started. */
static unsigned portLONG ulCriticalNesting = 0x9999UL;
#define portSAVE_CONTEXT() \
lea.l (-60, %sp), %sp; \
movem.l %d0-%fp, (%sp); \
move.l pxCurrentTCB, %a0; \
move.l %sp, (%a0);
#define portRESTORE_CONTEXT() \
move.l pxCurrentTCB, %a0; \
move.l (%a0), %sp; \
movem.l (%sp), %d0-%fp; \
lea.l %sp@(60), %sp; \
rte
/*-----------------------------------------------------------*/
portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE * pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
{
*pxTopOfStack = ( portSTACK_TYPE ) pvParameters;
pxTopOfStack--;
*pxTopOfStack = (portSTACK_TYPE) 0xDEADBEEF;
pxTopOfStack--;
/* Exception stack frame starts with the return address. */
*pxTopOfStack = ( portSTACK_TYPE ) pxCode;
pxTopOfStack--;
*pxTopOfStack = ( portINITIAL_FORMAT_VECTOR << 16UL ) | ( portINITIAL_STATUS_REGISTER );
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x0; /*FP*/
pxTopOfStack -= 14; /* A5 to D0. */
return pxTopOfStack;
}
/*-----------------------------------------------------------*/
portBASE_TYPE xPortStartScheduler( void )
{
extern void vPortStartFirstTask( void );
ulCriticalNesting = 0UL;
/* Configure the interrupts used by this port. */
vApplicationSetupInterrupts();
/* Start the first task executing. */
vPortStartFirstTask();
return pdFALSE;
}
/*-----------------------------------------------------------*/
void vPortEndScheduler( void )
{
/* Not implemented as there is nothing to return to. */
}
/*-----------------------------------------------------------*/
void vPortEnterCritical( void )
{
if( ulCriticalNesting == 0UL )
{
/* Guard against context switches being pended simultaneously with a
critical section being entered. */
do
{
portDISABLE_INTERRUPTS();
if( MCF_INTC0_INTFRCH == 0UL )
{
break;
}
portENABLE_INTERRUPTS();
} while( 1 );
}
ulCriticalNesting++;
}
/*-----------------------------------------------------------*/
void vPortExitCritical( void )
{
ulCriticalNesting--;
if( ulCriticalNesting == 0 )
{
portENABLE_INTERRUPTS();
}
}
/*-----------------------------------------------------------*/
void vPortYieldHandler( void )
{
unsigned portLONG ulSavedInterruptMask;
ulSavedInterruptMask = portSET_INTERRUPT_MASK_FROM_ISR();
/* Note this will clear all forced interrupts - this is done for speed. */
MCF_INTC0_INTFRCL = 0;
vTaskSwitchContext();
portCLEAR_INTERRUPT_MASK_FROM_ISR( ulSavedInterruptMask );
}
/*-----------------------------------------------------------*/