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Add initial PPC405 files - this is a work in progress not a completed port.
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Richard Barry
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3 changed files with 444 additions and 0 deletions
227
Source/portable/GCC/PPC405/port.c
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227
Source/portable/GCC/PPC405/port.c
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/*
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FreeRTOS.org V4.7.1 - Copyright (C) 2003-2008 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
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FreeRTOS.org is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FreeRTOS.org; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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A special exception to the GPL can be applied should you wish to distribute
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a combined work that includes FreeRTOS.org, without being obliged to provide
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the source code for any proprietary components. See the licensing section
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of http://www.FreeRTOS.org for full details of how and when the exception
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can be applied.
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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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+++ http://www.FreeRTOS.org +++
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Documentation, latest information, license and contact details.
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+++ http://www.SafeRTOS.com +++
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A version that is certified for use in safety critical systems.
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+++ http://www.OpenRTOS.com +++
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Commercial support, development, porting, licensing and training services.
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***************************************************************************
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*/
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/*-----------------------------------------------------------
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* Implementation of functions defined in portable.h for the MicroBlaze port.
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*----------------------------------------------------------*/
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/* Scheduler includes. */
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#include "FreeRTOS.h"
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#include "task.h"
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/* Library includes. */
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#include "xexception_l.h"
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#include "xtime_l.h"
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/* Standard includes. */
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#include <string.h>
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/*-----------------------------------------------------------*/
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#define portCRITICAL_INTERRUPT_ENABLE ( 1UL << 14UL )
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#define portEXTERNAL_INTERRUPT_ENABLE ( 1UL << 16UL )
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#define portMACHINE_CHECK_ENABLE ( 1UL << 19UL )
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#define portINITIAL_MSR ( portCRITICAL_INTERRUPT_ENABLE | portEXTERNAL_INTERRUPT_ENABLE | portMACHINE_CHECK_ENABLE )
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/*
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*/
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static void prvSetupTimerInterrupt( void );
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extern void vStartFirstTask( void );
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/*-----------------------------------------------------------*/
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static void prvTickISR( void );
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extern void vPortYield( void );
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/*
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* Initialise the stack of a task to look exactly as if a call to
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* portSAVE_CONTEXT had been made.
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*
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* See the header file portable.h.
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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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/* Place a known value at the bottom of the stack for debugging. */
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*pxTopOfStack = 0xDEADBEEF;
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*pxTopOfStack--;
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*pxTopOfStack = 0x10000001UL;; /* R0. */
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pxTopOfStack--;
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/* SP. */
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*pxTopOfStack = 0x31313131UL; /* R31. */
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pxTopOfStack--;
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*pxTopOfStack = 0x30303030UL; /* R30. */
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pxTopOfStack--;
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*pxTopOfStack = 0x29292929UL; /* R29. */
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pxTopOfStack--;
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*pxTopOfStack = 0x28282828UL; /* R28. */
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pxTopOfStack--;
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*pxTopOfStack = 0x27272727UL; /* R27. */
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pxTopOfStack--;
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*pxTopOfStack = 0x26262626UL; /* R26. */
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pxTopOfStack--;
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*pxTopOfStack = 0x25252525UL; /* R25. */
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pxTopOfStack--;
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*pxTopOfStack = 0x24242424UL; /* R24. */
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pxTopOfStack--;
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*pxTopOfStack = 0x23232323UL; /* R23. */
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pxTopOfStack--;
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*pxTopOfStack = 0x22222222UL; /* R22. */
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pxTopOfStack--;
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*pxTopOfStack = 0x21212121UL; /* R21. */
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pxTopOfStack--;
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*pxTopOfStack = 0x20202020UL; /* R20. */
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pxTopOfStack--;
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*pxTopOfStack = 0x19191919UL; /* R19. */
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pxTopOfStack--;
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*pxTopOfStack = 0x18181818UL; /* R18. */
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pxTopOfStack--;
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*pxTopOfStack = 0x17171717UL; /* R17. */
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pxTopOfStack--;
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*pxTopOfStack = 0x16161616UL; /* R16. */
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pxTopOfStack--;
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*pxTopOfStack = 0x15151515UL; /* R15. */
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pxTopOfStack--;
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*pxTopOfStack = 0x14141414UL; /* R14. */
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pxTopOfStack--;
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*pxTopOfStack = 0x13131313UL; /* R13. */
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pxTopOfStack--;
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*pxTopOfStack = 0x12121212UL; /* R12. */
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pxTopOfStack--;
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*pxTopOfStack = 0x11111111UL; /* R11. */
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pxTopOfStack--;
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*pxTopOfStack = 0x10101010UL; /* R10. */
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pxTopOfStack--;
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*pxTopOfStack = 0x09090909UL; /* R9. */
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pxTopOfStack--;
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*pxTopOfStack = 0x08080808UL; /* R8. */
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pxTopOfStack--;
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*pxTopOfStack = 0x07070707UL; /* R7. */
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pxTopOfStack--;
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*pxTopOfStack = 0x06060606UL; /* R6. */
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pxTopOfStack--;
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*pxTopOfStack = 0x05050505UL; /* R5. */
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pxTopOfStack--;
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*pxTopOfStack = 0x04040404UL; /* R4. */
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) pvParameters;
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pxTopOfStack--;
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*pxTopOfStack = 0x02020202UL; /* R2. */
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pxTopOfStack--;
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*pxTopOfStack = 0x00000000; /* CR. */
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pxTopOfStack--;
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*pxTopOfStack = 0x00000000; /* XER. */
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pxTopOfStack--;
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*pxTopOfStack = 0x00000000; /* LR. */
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pxTopOfStack--;
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*pxTopOfStack = 0x00000000; /* CTR. */
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pxTopOfStack--;
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*pxTopOfStack = 0x00000000; /* USPRG0. */
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) pxCode; /* SRR0. */
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pxTopOfStack--;
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*pxTopOfStack = portINITIAL_MSR;/* SRR1. */
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pxTopOfStack--;
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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 *pxCurrentTCB;
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prvSetupTimerInterrupt();
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vStartFirstTask();
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/* Should not get here as the tasks are now running! */
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return pdFALSE;
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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. */
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}
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/*-----------------------------------------------------------*/
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/*
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* Hardware initialisation to generate the RTOS tick.
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*/
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static void prvSetupTimerInterrupt( void )
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{
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const unsigned portLONG ulInterval = ( ( configCPU_CLOCK_HZ / configTICK_RATE_HZ ) - 1UL );
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XExc_Init();
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XExc_mDisableExceptions( XEXC_NON_CRITICAL ) ;
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XExc_RegisterHandler( XEXC_ID_PIT_INT, ( XExceptionHandler ) prvTickISR, ( void * ) 0 );
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XExc_RegisterHandler( XEXC_ID_SYSTEM_CALL, ( XExceptionHandler ) vPortYield, ( void * ) 0 );
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XTime_PITEnableAutoReload();
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XTime_PITEnableInterrupt();
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XTime_PITSetInterval( ulInterval );
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XTime_PITEnableInterrupt();
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XExc_mEnableExceptions( XEXC_NON_CRITICAL ) ;
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}
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/*-----------------------------------------------------------*/
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static void prvTickISR( void )
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{
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static unsigned portLONG ulTicks = 0;
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ulTicks++;
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if( ulTicks >= 1000 )
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{
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vParTestToggleLED( 0 );
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ulTicks = 0;
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}
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XTime_PITClearInterrupt();
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#if configUSE_PREEMPTION == 1
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#endif
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}
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/*-----------------------------------------------------------*/
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