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First version under SVN is V4.0.1
This commit is contained in:
Richard Barry
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918 changed files with 269038 additions and 0 deletions
255
Source/portable/oWatcom/16BitDOS/Flsh186/port.c
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255
Source/portable/oWatcom/16BitDOS/Flsh186/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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/*
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Changes from V1.00:
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+ Call to taskYIELD() from within tick ISR has been replaced by the more
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efficient portSWITCH_CONTEXT().
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+ ISR function definitions renamed to include the prv prefix.
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Changes from V1.2.0:
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+ portRESET_PIC() is now called last thing before the end of the preemptive
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tick routine.
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Changes from V2.6.1
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+ Replaced the sUsingPreemption variable with the configUSE_PREEMPTION
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macro to be consistent with the later ports.
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*/
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/*-----------------------------------------------------------
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* Implementation of functions defined in portable.h for the Flashlite 186
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* port.
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*----------------------------------------------------------*/
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#include <stdlib.h>
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#include <i86.h>
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#include <dos.h>
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#include <setjmp.h>
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#include "FreeRTOS.h"
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#include "task.h"
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#include "portasm.h"
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/*lint -e950 Non ANSI reserved words okay in this file only. */
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#define portTIMER_EOI_TYPE ( 8 )
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#define portRESET_PIC() portOUTPUT_WORD( ( unsigned portSHORT ) 0xff22, portTIMER_EOI_TYPE )
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#define portTIMER_INT_NUMBER 0x12
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#define portTIMER_1_CONTROL_REGISTER ( ( unsigned portSHORT ) 0xff5e )
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#define portTIMER_0_CONTROL_REGISTER ( ( unsigned portSHORT ) 0xff56 )
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#define portTIMER_INTERRUPT_ENABLE ( ( unsigned portSHORT ) 0x2000 )
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/* Setup the hardware to generate the required tick frequency. */
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static void prvSetTickFrequency( unsigned portLONG ulTickRateHz );
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/* Set the hardware back to the state as per before the scheduler started. */
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static void prvExitFunction( void );
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#if configUSE_PREEMPTION == 1
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/* Tick service routine used by the scheduler when preemptive scheduling is
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being used. */
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static void __interrupt __far prvPreemptiveTick( void );
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#else
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/* Tick service routine used by the scheduler when cooperative scheduling is
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being used. */
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static void __interrupt __far prvNonPreemptiveTick( void );
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#endif
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/* Trap routine used by taskYIELD() to manually cause a context switch. */
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static void __interrupt __far prvYieldProcessor( void );
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/*lint -e956 File scopes necessary here. */
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/* Set true when the vectors are set so the scheduler will service the tick. */
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static portSHORT sSchedulerRunning = pdFALSE;
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/* Points to the original routine installed on the vector we use for manual context switches. This is then used to restore the original routine during prvExitFunction(). */
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static void ( __interrupt __far *pxOldSwitchISR )();
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/* Used to restore the original DOS context when the scheduler is ended. */
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static jmp_buf xJumpBuf;
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/*lint +e956 */
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/*-----------------------------------------------------------*/
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portBASE_TYPE xPortStartScheduler( void )
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{
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/* This is called with interrupts already disabled. */
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/* Remember what was on the interrupts we are going to use
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so we can put them back later if required. */
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pxOldSwitchISR = _dos_getvect( portSWITCH_INT_NUMBER );
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/* Put our manual switch (yield) function on a known
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vector. */
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_dos_setvect( portSWITCH_INT_NUMBER, prvYieldProcessor );
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#if configUSE_PREEMPTION == 1
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{
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/* Put our tick switch function on the timer interrupt. */
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_dos_setvect( portTIMER_INT_NUMBER, prvPreemptiveTick );
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}
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#else
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{
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/* We want the timer interrupt to just increment the tick count. */
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_dos_setvect( portTIMER_INT_NUMBER, prvNonPreemptiveTick );
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}
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#endif
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prvSetTickFrequency( configTICK_RATE_HZ );
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/* Clean up function if we want to return to DOS. */
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if( setjmp( xJumpBuf ) != 0 )
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{
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prvExitFunction();
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sSchedulerRunning = pdFALSE;
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}
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else
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{
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sSchedulerRunning = pdTRUE;
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/* Kick off the scheduler by setting up the context of the first task. */
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portFIRST_CONTEXT();
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}
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return sSchedulerRunning;
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}
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/*-----------------------------------------------------------*/
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/* The tick ISR used depend on whether or not the preemptive or cooperative
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kernel is being used. */
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#if configUSE_PREEMPTION == 1
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static void __interrupt __far prvPreemptiveTick( void )
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{
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/* Get the scheduler to update the task states following the tick. */
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vTaskIncrementTick();
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/* Switch in the context of the next task to be run. */
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portSWITCH_CONTEXT();
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/* Reset the PIC ready for the next time. */
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portRESET_PIC();
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}
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#else
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static void __interrupt __far prvNonPreemptiveTick( void )
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{
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/* Same as preemptive tick, but the cooperative scheduler is being used
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so we don't have to switch in the context of the next task. */
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vTaskIncrementTick();
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portRESET_PIC();
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}
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#endif
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/*-----------------------------------------------------------*/
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static void __interrupt __far prvYieldProcessor( void )
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{
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/* Switch in the context of the next task to be run. */
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portSWITCH_CONTEXT();
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}
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/*-----------------------------------------------------------*/
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void vPortEndScheduler( void )
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{
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/* Jump back to the processor state prior to starting the
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scheduler. This means we are not going to be using a
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task stack frame so the task can be deleted. */
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longjmp( xJumpBuf, 1 );
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}
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/*-----------------------------------------------------------*/
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static void prvExitFunction( void )
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{
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const unsigned portSHORT usTimerDisable = 0x0000;
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unsigned portSHORT usTimer0Control;
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/* Interrupts should be disabled here anyway - but no
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harm in making sure. */
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portDISABLE_INTERRUPTS();
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if( sSchedulerRunning == pdTRUE )
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{
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/* Put back the switch interrupt routines that was in place
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before the scheduler started. */
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_dos_setvect( portSWITCH_INT_NUMBER, pxOldSwitchISR );
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}
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/* Disable the timer used for the tick to ensure the scheduler is
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not called before restoring interrupts. There was previously nothing
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on this timer so there is no old ISR to restore. */
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portOUTPUT_WORD( portTIMER_1_CONTROL_REGISTER, usTimerDisable );
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/* Restart the DOS tick. */
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usTimer0Control = portINPUT_WORD( portTIMER_0_CONTROL_REGISTER );
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usTimer0Control |= portTIMER_INTERRUPT_ENABLE;
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portOUTPUT_WORD( portTIMER_0_CONTROL_REGISTER, usTimer0Control );
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portENABLE_INTERRUPTS();
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/* This will free up all the memory used by the scheduler.
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exiting back to dos with INT21 AH=4CH will do this anyway so
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it is not necessary to call this. */
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vTaskCleanUpResources();
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}
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/*-----------------------------------------------------------*/
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static void prvSetTickFrequency( unsigned portLONG ulTickRateHz )
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{
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const unsigned portSHORT usMaxCountRegister = 0xff5a;
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const unsigned portSHORT usTimerPriorityRegister = 0xff32;
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const unsigned portSHORT usTimerEnable = 0xC000;
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const unsigned portSHORT usRetrigger = 0x0001;
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const unsigned portSHORT usTimerHighPriority = 0x0000;
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unsigned portSHORT usTimer0Control;
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/* ( CPU frequency / 4 ) / clock 2 max count [inpw( 0xff62 ) = 7] */
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const unsigned portLONG ulClockFrequency = 0x7f31a0;
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unsigned portLONG ulTimerCount = ulClockFrequency / ulTickRateHz;
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portOUTPUT_WORD( portTIMER_1_CONTROL_REGISTER, usTimerEnable | portTIMER_INTERRUPT_ENABLE | usRetrigger );
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portOUTPUT_WORD( usMaxCountRegister, ( unsigned portSHORT ) ulTimerCount );
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portOUTPUT_WORD( usTimerPriorityRegister, usTimerHighPriority );
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/* Stop the DOS tick - don't do this if you want to maintain a TOD clock. */
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usTimer0Control = portINPUT_WORD( portTIMER_0_CONTROL_REGISTER );
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usTimer0Control &= ~portTIMER_INTERRUPT_ENABLE;
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portOUTPUT_WORD( portTIMER_0_CONTROL_REGISTER, usTimer0Control );
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}
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/*lint +e950 */
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104
Source/portable/oWatcom/16BitDOS/Flsh186/portmacro.h
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104
Source/portable/oWatcom/16BitDOS/Flsh186/portmacro.h
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@ -0,0 +1,104 @@
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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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***************************************************************************
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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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#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 long
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#define portLONG long
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#define portSHORT int
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#define portSTACK_TYPE unsigned portSHORT
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#define portBASE_TYPE portSHORT
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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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/* Critical section management. */
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void portENTER_CRITICAL( void );
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#pragma aux portENTER_CRITICAL = "pushf" \
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"cli";
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void portEXIT_CRITICAL( void );
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#pragma aux portEXIT_CRITICAL = "popf";
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void portDISABLE_INTERRUPTS( void );
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#pragma aux portDISABLE_INTERRUPTS = "cli";
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void portENABLE_INTERRUPTS( void );
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#pragma aux portENABLE_INTERRUPTS = "sti";
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/*-----------------------------------------------------------*/
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/* Architecture specifics. */
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#define portSTACK_GROWTH ( -1 )
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#define portSWITCH_INT_NUMBER 0x80
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#define portYIELD() __asm{ int portSWITCH_INT_NUMBER }
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#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ )
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#define portBYTE_ALIGNMENT 2
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#define portINITIAL_SW ( ( portSTACK_TYPE ) 0x0202 ) /* Start the tasks with interrupts enabled. */
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#define portNOP() __asm{ nop }
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/*-----------------------------------------------------------*/
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/* Compiler specifics. */
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#define portINPUT_BYTE( xAddr ) inp( xAddr )
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#define portOUTPUT_BYTE( xAddr, ucValue ) outp( xAddr, ucValue )
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#define portINPUT_WORD( xAddr ) inpw( xAddr )
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#define portOUTPUT_WORD( xAddr, usValue ) outpw( xAddr, usValue )
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#define inline
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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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