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https://github.com/FreeRTOS/FreeRTOS-Kernel.git
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First version under SVN is V4.0.1
This commit is contained in:
Richard Barry
parent
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commit
b6df57c7e3
918 changed files with 269038 additions and 0 deletions
306
Source/portable/GCC/H8S2329/port.c
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306
Source/portable/GCC/H8S2329/port.c
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/*
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FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.
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This file is part of the FreeRTOS distribution.
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FreeRTOS 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 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; 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, 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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See http://www.FreeRTOS.org for documentation, latest information, license
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and contact details. Please ensure to read the configuration and relevant
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port sections of the online documentation.
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***************************************************************************
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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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/*-----------------------------------------------------------
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* Implementation of functions defined in portable.h for the H8S port.
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*----------------------------------------------------------*/
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/*-----------------------------------------------------------*/
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/* When the task starts interrupts should be enabled. */
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#define portINITIAL_CCR ( ( portSTACK_TYPE ) 0x00 )
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/* Hardware specific constants used to generate the RTOS tick from the TPU. */
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#define portCLEAR_ON_TGRA_COMPARE_MATCH ( ( unsigned portCHAR ) 0x20 )
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#define portCLOCK_DIV_64 ( ( unsigned portCHAR ) 0x03 )
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#define portCLOCK_DIV ( ( unsigned portLONG ) 64 )
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#define portTGRA_INTERRUPT_ENABLE ( ( unsigned portCHAR ) 0x01 )
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#define portTIMER_CHANNEL ( ( unsigned portCHAR ) 0x02 )
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#define portMSTP13 ( ( unsigned portSHORT ) 0x2000 )
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/*
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* Setup TPU channel one for the RTOS tick at the requested frequency.
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*/
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static void prvSetupTimerInterrupt( void );
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/*
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* The ISR used by portYIELD(). This is installed as a trap handler.
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*/
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void vPortYield( void ) __attribute__ ( ( saveall, interrupt_handler ) );
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/*-----------------------------------------------------------*/
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/*
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* See header file for description.
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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 ulValue;
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/* This requires an even address. */
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ulValue = ( unsigned portLONG ) pxTopOfStack;
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if( ulValue & 1UL )
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{
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pxTopOfStack = pxTopOfStack - 1;
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}
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/* Place a few bytes of known values on the bottom of the stack.
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This is just useful for debugging. */
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pxTopOfStack--;
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*pxTopOfStack = 0xaa;
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pxTopOfStack--;
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*pxTopOfStack = 0xbb;
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pxTopOfStack--;
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*pxTopOfStack = 0xcc;
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pxTopOfStack--;
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*pxTopOfStack = 0xdd;
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/* The initial stack mimics an interrupt stack. First there is the program
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counter (24 bits). */
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ulValue = ( unsigned portLONG ) pxCode;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) ( ulValue & 0xff );
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pxTopOfStack--;
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ulValue >>= 8UL;
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*pxTopOfStack = ( portSTACK_TYPE ) ( ulValue & 0xff );
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pxTopOfStack--;
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ulValue >>= 8UL;
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*pxTopOfStack = ( portSTACK_TYPE ) ( ulValue & 0xff );
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/* Followed by the CCR. */
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pxTopOfStack--;
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*pxTopOfStack = portINITIAL_CCR;
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/* Next all the general purpose registers - with the parameters being passed
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in ER0. The parameter order must match that used by the compiler when the
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"saveall" function attribute is used. */
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/* ER6 */
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pxTopOfStack--;
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*pxTopOfStack = 0x66;
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pxTopOfStack--;
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*pxTopOfStack = 0x66;
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pxTopOfStack--;
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*pxTopOfStack = 0x66;
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pxTopOfStack--;
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*pxTopOfStack = 0x66;
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/* ER0 */
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ulValue = ( unsigned portLONG ) pvParameters;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) ( ulValue & 0xff );
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pxTopOfStack--;
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ulValue >>= 8UL;
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*pxTopOfStack = ( portSTACK_TYPE ) ( ulValue & 0xff );
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pxTopOfStack--;
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ulValue >>= 8UL;
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*pxTopOfStack = ( portSTACK_TYPE ) ( ulValue & 0xff );
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pxTopOfStack--;
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ulValue >>= 8UL;
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*pxTopOfStack = ( portSTACK_TYPE ) ( ulValue & 0xff );
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/* ER1 */
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pxTopOfStack--;
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*pxTopOfStack = 0x11;
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pxTopOfStack--;
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*pxTopOfStack = 0x11;
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pxTopOfStack--;
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*pxTopOfStack = 0x11;
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pxTopOfStack--;
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*pxTopOfStack = 0x11;
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/* ER2 */
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pxTopOfStack--;
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*pxTopOfStack = 0x22;
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pxTopOfStack--;
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*pxTopOfStack = 0x22;
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pxTopOfStack--;
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*pxTopOfStack = 0x22;
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pxTopOfStack--;
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*pxTopOfStack = 0x22;
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/* ER3 */
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pxTopOfStack--;
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*pxTopOfStack = 0x33;
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pxTopOfStack--;
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*pxTopOfStack = 0x33;
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pxTopOfStack--;
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*pxTopOfStack = 0x33;
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pxTopOfStack--;
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*pxTopOfStack = 0x33;
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/* ER4 */
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pxTopOfStack--;
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*pxTopOfStack = 0x44;
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pxTopOfStack--;
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*pxTopOfStack = 0x44;
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pxTopOfStack--;
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*pxTopOfStack = 0x44;
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pxTopOfStack--;
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*pxTopOfStack = 0x44;
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/* ER5 */
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pxTopOfStack--;
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*pxTopOfStack = 0x55;
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pxTopOfStack--;
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*pxTopOfStack = 0x55;
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pxTopOfStack--;
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*pxTopOfStack = 0x55;
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pxTopOfStack--;
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*pxTopOfStack = 0x55;
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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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/* Setup the hardware to generate the tick. */
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prvSetupTimerInterrupt();
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/* Restore the context of the first task that is going to run. This
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mirrors the function epilogue code generated by the compiler when the
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"saveall" function attribute is used. */
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asm volatile (
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"MOV.L @_pxCurrentTCB, ER6 \n\t"
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"MOV.L @ER6, ER7 \n\t"
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"LDM.L @SP+, (ER4-ER5) \n\t"
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"LDM.L @SP+, (ER0-ER3) \n\t"
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"MOV.L @ER7+, ER6 \n\t"
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"RTE \n\t"
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);
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( void ) pxCurrentTCB;
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/* Should not get here. */
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return pdTRUE;
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}
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/*-----------------------------------------------------------*/
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void vPortEndScheduler( void )
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{
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/* It is unlikely that the h8 port will get stopped. */
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}
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/*-----------------------------------------------------------*/
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/*
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* Manual context switch. This is a trap handler. The "saveall" function
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* attribute is used so the context is saved by the compiler prologue. All
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* we have to do is save the stack pointer.
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*/
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void vPortYield( void )
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{
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portSAVE_STACK_POINTER();
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vTaskSwitchContext();
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portRESTORE_STACK_POINTER();
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}
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/*-----------------------------------------------------------*/
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/*
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* The interrupt handler installed for the RTOS tick depends on whether the
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* preemptive or cooperative scheduler is being used.
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*/
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#if( configUSE_PREEMPTION == 1 )
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/*
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* The preemptive scheduler is used so the ISR calls vTaskSwitchContext().
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* The function prologue saves the context so all we have to do is save
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* the stack pointer.
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*/
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void vTickISR( void ) __attribute__ ( ( saveall, interrupt_handler ) );
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void vTickISR( void )
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{
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portSAVE_STACK_POINTER();
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vTaskIncrementTick();
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vTaskSwitchContext();
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/* Clear the interrupt. */
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TSR1 &= ~0x01;
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portRESTORE_STACK_POINTER();
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}
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#else
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/*
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* The cooperative scheduler is being used so all we have to do is
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* periodically increment the tick. This can just be a normal ISR and
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* the "saveall" attribute is not required.
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*/
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void vTickISR( void ) __attribute__ ( ( interrupt_handler ) );
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void vTickISR( void )
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{
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vTaskIncrementTick();
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/* Clear the interrupt. */
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TSR1 &= ~0x01;
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}
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#endif
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/*-----------------------------------------------------------*/
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/*
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* Setup timer 1 compare match to generate a tick interrupt.
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*/
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static void prvSetupTimerInterrupt( void )
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{
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const unsigned portLONG ulCompareMatch = ( configCPU_CLOCK_HZ / configTICK_RATE_HZ ) / portCLOCK_DIV;
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/* Turn the module on. */
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MSTPCR &= ~portMSTP13;
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/* Configure timer 1. */
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TCR1 = portCLEAR_ON_TGRA_COMPARE_MATCH | portCLOCK_DIV_64;
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/* Configure the compare match value for a tick of configTICK_RATE_HZ. */
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TGR1A = ulCompareMatch;
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/* Start the timer and enable the interrupt - we can do this here as
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interrupts are globally disabled when this function is called. */
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TIER1 |= portTGRA_INTERRUPT_ENABLE;
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TSTR |= portTIMER_CHANNEL;
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}
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/*-----------------------------------------------------------*/
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131
Source/portable/GCC/H8S2329/portmacro.h
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131
Source/portable/GCC/H8S2329/portmacro.h
Normal file
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@ -0,0 +1,131 @@
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/*
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FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.
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This file is part of the FreeRTOS distribution.
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FreeRTOS 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 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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|
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You should have received a copy of the GNU General Public License
|
||||
along with FreeRTOS; 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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A special exception to the GPL can be applied should you wish to distribute
|
||||
a combined work that includes FreeRTOS, 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.
|
||||
|
||||
***************************************************************************
|
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See http://www.FreeRTOS.org for documentation, latest information, license
|
||||
and contact details. Please ensure to read the configuration and relevant
|
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port sections of the online documentation.
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***************************************************************************
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*/
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#ifndef PORTMACRO_H
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#define PORTMACRO_H
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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 portCHAR
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#define portBASE_TYPE char
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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 2
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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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#define portYIELD() asm volatile( "TRAPA #0" )
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#define portNOP() asm volatile( "NOP" )
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/*-----------------------------------------------------------*/
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/* Critical section handling. */
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#define portENABLE_INTERRUPTS() asm volatile( "ANDC #0x7F, CCR" );
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#define portDISABLE_INTERRUPTS() asm volatile( "ORC #0x80, CCR" );
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/* Push the CCR then disable interrupts. */
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#define portENTER_CRITICAL() asm volatile( "STC CCR, @-ER7" ); \
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portDISABLE_INTERRUPTS();
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/* Pop the CCR to set the interrupt masking back to its previous state. */
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#define portEXIT_CRITICAL() asm volatile( "LDC @ER7+, CCR" );
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/*-----------------------------------------------------------*/
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/* Task utilities. */
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/* Context switch macros. These macros are very simple as the context
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is saved simply by selecting the saveall attribute of the context switch
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interrupt service routines. These macros save and restore the stack
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pointer to the TCB. */
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#define portSAVE_STACK_POINTER() \
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extern void* pxCurrentTCB; \
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\
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asm volatile( \
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"MOV.L @_pxCurrentTCB, ER5 \n\t" \
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"MOV.L ER7, @ER5 \n\t" \
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); \
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( void ) pxCurrentTCB;
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#define portRESTORE_STACK_POINTER() \
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extern void* pxCurrentTCB; \
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\
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asm volatile( \
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"MOV.L @_pxCurrentTCB, ER5 \n\t" \
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"MOV.L @ER5, ER7 \n\t" \
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); \
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( void ) pxCurrentTCB;
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/*-----------------------------------------------------------*/
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/* Macros to allow a context switch from within an application ISR. */
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#define portENTER_SWITCHING_ISR() portSAVE_STACK_POINTER(); {
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#define portEXIT_SWITCHING_ISR( x ) \
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if( x ) \
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{ \
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extern void vTaskSwitchContext( void ); \
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vTaskSwitchContext(); \
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} \
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} portRESTORE_STACK_POINTER();
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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 )
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#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
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#endif /* PORTMACRO_H */
|
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|
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