New port layer files.
Richard Barry
16 years ago
parent
e52a6e390e
commit
a5060cd1e2
@ -0,0 +1,212 @@
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/*
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FreeRTOS.org V5.3.0 - Copyright (C) 2003-2009 Richard Barry.
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This file is part of the FreeRTOS.org distribution.
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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
|
||||
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.org without being obliged to provide
|
||||
the source code for any proprietary components. Alternative commercial
|
||||
license and support terms are also available upon request. See the
|
||||
licensing section of http://www.FreeRTOS.org for full details.
|
||||
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||||
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.
|
||||
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||||
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
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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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* 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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1 tab == 4 spaces!
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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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http://www.FreeRTOS.org - Documentation, latest information, license and
|
||||
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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/* Kernel includes. */
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#include "FreeRTOS.h"
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#include "task.h"
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#define portINITIAL_FORMAT_VECTOR ( ( portSTACK_TYPE ) 0x4000 )
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/* Supervisor mode set. */
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#define portINITIAL_STATUS_REGISTER ( ( portSTACK_TYPE ) 0x2000)
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/* The clock prescale into the timer peripheral. */
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#define portPRESCALE_VALUE ( ( unsigned portCHAR ) 10 )
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/* The clock frequency into the RTC. */
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#define portRTC_CLOCK_HZ ( ( unsigned portLONG ) 1000 )
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asm void interrupt VectorNumber_VL1swi vPortYieldISR( void );
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static void prvSetupTimerInterrupt( void );
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/* Used to keep track of the number of nested calls to taskENTER_CRITICAL(). This
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will be set to 0 prior to the first task being started. */
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static unsigned portLONG ulCriticalNesting = 0x9999UL;
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/*-----------------------------------------------------------*/
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portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE * pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
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{
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unsigned portLONG ulOriginalA5;
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__asm{ MOVE.L A5, ulOriginalA5 };
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*pxTopOfStack = (portSTACK_TYPE) 0xDEADBEEF;
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pxTopOfStack--;
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/* Exception stack frame starts with the return address. */
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*pxTopOfStack = ( portSTACK_TYPE ) pxCode;
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pxTopOfStack--;
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*pxTopOfStack = ( portINITIAL_FORMAT_VECTOR << 16UL ) | ( portINITIAL_STATUS_REGISTER );
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x0; /*FP*/
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pxTopOfStack -= 14; /* A5 to D0. */
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/* Parameter in A0. */
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*( pxTopOfStack + 8 ) = ( portSTACK_TYPE ) pvParameters;
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/* A5 must be maintained as it is resurved by the compiler. */
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*( pxTopOfStack + 13 ) = ulOriginalA5;
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return pxTopOfStack;
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}
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/*-----------------------------------------------------------*/
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portBASE_TYPE xPortStartScheduler( void )
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{
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extern void vPortStartFirstTask( void );
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ulCriticalNesting = 0UL;
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/* Configure a timer to generate the tick interrupt. */
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prvSetupTimerInterrupt();
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/* Start the first task executing. */
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vPortStartFirstTask();
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return pdFALSE;
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}
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/*-----------------------------------------------------------*/
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static void prvSetupTimerInterrupt( void )
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{
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/* Prescale by 1 - ie no prescale. */
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RTCSC |= 8;
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/* Compare match value. */
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RTCMOD = portRTC_CLOCK_HZ / configTICK_RATE_HZ;
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/* Enable the RTC to generate interrupts - interrupts are already disabled
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when this code executes. */
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RTCSC_RTIE = 1;
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}
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/*-----------------------------------------------------------*/
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void vPortEndScheduler( void )
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{
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/* Not implemented as there is nothing to return to. */
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}
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/*-----------------------------------------------------------*/
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void vPortEnterCritical( void )
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{
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if( ulCriticalNesting == 0UL )
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{
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/* Guard against context switches being pended simultaneously with a
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critical section being entered. */
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do
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{
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portDISABLE_INTERRUPTS();
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if( INTC_FRC == 0UL )
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{
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break;
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}
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portENABLE_INTERRUPTS();
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} while( 1 );
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}
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ulCriticalNesting++;
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}
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/*-----------------------------------------------------------*/
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void vPortExitCritical( void )
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{
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ulCriticalNesting--;
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if( ulCriticalNesting == 0 )
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{
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portENABLE_INTERRUPTS();
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}
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}
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/*-----------------------------------------------------------*/
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void vPortYieldHandler( void )
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{
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unsigned portLONG ulSavedInterruptMask;
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ulSavedInterruptMask = portSET_INTERRUPT_MASK_FROM_ISR();
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{
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/* Note this will clear all forced interrupts - this is done for speed. */
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INTC_CFRC = 0x3E;
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vTaskSwitchContext();
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}
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portCLEAR_INTERRUPT_MASK_FROM_ISR( ulSavedInterruptMask );
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}
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/*-----------------------------------------------------------*/
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void interrupt VectorNumber_Vrtc vPortTickISR( void )
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{
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unsigned portLONG ulSavedInterruptMask;
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/* Clear the interrupt. */
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RTCSC |= RTCSC_RTIF_MASK;
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/* Increment the RTOS tick. */
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ulSavedInterruptMask = portSET_INTERRUPT_MASK_FROM_ISR();
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{
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vTaskIncrementTick();
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}
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portCLEAR_INTERRUPT_MASK_FROM_ISR( ulSavedInterruptMask );
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/* If we are using the pre-emptive scheduler then also request a
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context switch as incrementing the tick could have unblocked a task. */
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#if configUSE_PREEMPTION == 1
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{
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taskYIELD();
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}
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#endif
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}
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@ -0,0 +1,154 @@
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/*
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FreeRTOS.org V5.3.0 - Copyright (C) 2003-2009 Richard Barry.
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This file is part of the FreeRTOS.org distribution.
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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
|
||||
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
|
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combined work that includes FreeRTOS.org without being obliged to provide
|
||||
the source code for any proprietary components. Alternative commercial
|
||||
license and support terms are also available upon request. See the
|
||||
licensing section of http://www.FreeRTOS.org for full details.
|
||||
|
||||
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.
|
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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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1 tab == 4 spaces!
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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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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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/*
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* Purpose: Lowest level routines for all ColdFire processors.
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*
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* Notes:
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*
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* ulPortSetIPL() and mcf5xxx_wr_cacr() copied with permission from FreeScale
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* supplied source files.
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*/
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.global ulPortSetIPL
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.global _ulPortSetIPL
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.global mcf5xxx_wr_cacrx
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.global _mcf5xxx_wr_cacrx
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.global vPortYieldISR
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.global _vPortYieldISR
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.global vPortStartFirstTask
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.global _vPortStartFirstTask
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.extern _pxCurrentTCB
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.extern _vPortYieldHandler
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.text
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.macro portSAVE_CONTEXT
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lea.l (-60, sp), sp
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movem.l d0-a6, (sp)
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move.l _pxCurrentTCB, a0
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move.l sp, (a0)
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.endm
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.macro portRESTORE_CONTEXT
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move.l _pxCurrentTCB, a0
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move.l (a0), sp
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movem.l (sp), d0-a6
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lea.l (60, sp), sp
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rte
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.endm
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/********************************************************************/
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/*
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* This routines changes the IPL to the value passed into the routine.
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* It also returns the old IPL value back.
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* Calling convention from C:
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* old_ipl = asm_set_ipl(new_ipl);
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* For the Diab Data C compiler, it passes return value thru D0.
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* Note that only the least significant three bits of the passed
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* value are used.
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*/
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ulPortSetIPL:
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_ulPortSetIPL:
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link A6,#-8
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movem.l D6-D7,(SP)
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move.w SR,D7 /* current sr */
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move.l D7,D6 /* prepare return value */
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andi.l #0x0700,D6 /* mask out IPL */
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lsr.l #8,D6 /* IPL */
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andi.l #0x07,D0 /* least significant three bits */
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lsl.l #8,D0 /* move over to make mask */
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andi.l #0x0000F8FF,D7 /* zero out current IPL */
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or.l D0,D7 /* place new IPL in sr */
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move.w D7,SR
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move.l D6, D0 /* Return value in D0. */
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movem.l (SP),D6-D7
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lea 8(SP),SP
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unlk A6
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rts
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/********************************************************************/
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mcf5xxx_wr_cacrx:
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_mcf5xxx_wr_cacrx:
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move.l 4(sp),d0
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.long 0x4e7b0002 /* movec d0,cacr */
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nop
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rts
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/********************************************************************/
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/* Yield interrupt. */
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_vPortYieldISR:
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vPortYieldISR:
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portSAVE_CONTEXT
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jsr _vPortYieldHandler
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portRESTORE_CONTEXT
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/********************************************************************/
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vPortStartFirstTask:
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_vPortStartFirstTask:
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portRESTORE_CONTEXT
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.end
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@ -0,0 +1,134 @@
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/*
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FreeRTOS.org V5.3.0 - Copyright (C) 2003-2009 Richard Barry.
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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
|
||||
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.org without being obliged to provide
|
||||
the source code for any proprietary components. Alternative commercial
|
||||
license and support terms are also available upon request. See the
|
||||
licensing section of http://www.FreeRTOS.org for full details.
|
||||
|
||||
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.
|
||||
|
||||
|
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***************************************************************************
|
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* *
|
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* Get the FreeRTOS eBook! See http://www.FreeRTOS.org/Documentation *
|
||||
* *
|
||||
* This is a concise, step by step, 'hands on' guide that describes both *
|
||||
* general multitasking concepts and FreeRTOS specifics. It presents and *
|
||||
* explains numerous examples that are written using the FreeRTOS API. *
|
||||
* Full source code for all the examples is provided in an accompanying *
|
||||
* .zip file. *
|
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* *
|
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***************************************************************************
|
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|
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1 tab == 4 spaces!
|
||||
|
||||
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.
|
||||
*/
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#ifndef PORTMACRO_H
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#define PORTMACRO_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*-----------------------------------------------------------
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* Port specific definitions.
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*
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* The settings in this file configure FreeRTOS correctly for the
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* given hardware and compiler.
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*
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* These settings should not be altered.
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*-----------------------------------------------------------
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*/
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/* Type definitions. */
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#define portCHAR char
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#define portFLOAT float
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#define portDOUBLE double
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#define portLONG long
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#define portSHORT short
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#define portSTACK_TYPE unsigned long
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#define portBASE_TYPE long
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#if( configUSE_16_BIT_TICKS == 1 )
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typedef unsigned portSHORT portTickType;
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#define portMAX_DELAY ( portTickType ) 0xffff
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#else
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typedef unsigned portLONG portTickType;
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#define portMAX_DELAY ( portTickType ) 0xffffffff
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#endif
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/*-----------------------------------------------------------*/
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/* Hardware specifics. */
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#define portBYTE_ALIGNMENT 4
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#define portSTACK_GROWTH -1
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#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ )
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/*-----------------------------------------------------------*/
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unsigned portLONG ulPortSetIPL( unsigned portLONG );
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#define portDISABLE_INTERRUPTS() ulPortSetIPL( configMAX_SYSCALL_INTERRUPT_PRIORITY )
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#define portENABLE_INTERRUPTS() ulPortSetIPL( 0 )
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extern void vPortEnterCritical( void );
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extern void vPortExitCritical( void );
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#define portENTER_CRITICAL() vPortEnterCritical()
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#define portEXIT_CRITICAL() vPortExitCritical()
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extern unsigned portBASE_TYPE uxPortSetInterruptMaskFromISR( void );
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extern void vPortClearInterruptMaskFromISR( unsigned portBASE_TYPE );
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#define portSET_INTERRUPT_MASK_FROM_ISR() ulPortSetIPL( configMAX_SYSCALL_INTERRUPT_PRIORITY )
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#define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedStatusRegister ) ulPortSetIPL( uxSavedStatusRegister )
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/*-----------------------------------------------------------*/
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/* Task utilities. */
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#define portNOP() asm volatile ( "nop" )
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/* Context switches are requested using the force register. */
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#define portYIELD() INTC_SFRC = 0x3E; portNOP(); portNOP(); portNOP(); portNOP(); portNOP()
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/*-----------------------------------------------------------*/
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/* Task function macros as described on the FreeRTOS.org WEB site. */
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#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters ) __attribute__((noreturn))
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#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
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/*-----------------------------------------------------------*/
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#define portEND_SWITCHING_ISR( xSwitchRequired ) if( xSwitchRequired != pdFALSE ) \
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{ \
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portYIELD(); \
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* PORTMACRO_H */
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