forked from epagris/FreeRTOS-Kernel
Remove .bak files.
This commit is contained in:
Richard Barry
parent
2ac722926e
commit
3c02bc385b
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/*
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FreeRTOS.org V4.2.1 - Copyright (C) 2003-2007 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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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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Also see http://www.SafeRTOS.com for an IEC 61508 compliant version along
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with commercial development and support options.
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***************************************************************************
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*/
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#ifndef PORT_ASM_H
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#define PORT_ASM_H
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typedef void tskTCB;
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extern volatile tskTCB * volatile pxCurrentTCB;
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extern void vTaskSwitchContext( void );
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/*
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* Saves the stack pointer for one task into its TCB, calls
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* vTaskSwitchContext() to update the TCB being used, then restores the stack
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* from the new TCB read to run the task.
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*/
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void portSWITCH_CONTEXT( void );
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/*
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* Load the stack pointer from the TCB of the task which is going to be first
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* to execute. Then force an IRET so the registers and IP are popped off the
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* stack.
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*/
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void portFIRST_CONTEXT( void );
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#define portSWITCH_CONTEXT() \
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asm { mov bx, [pxCurrentTCB] } \
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asm { mov word ptr [bx], sp } \
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asm { call far ptr vTaskSwitchContext } \
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asm { mov bx, [pxCurrentTCB] } \
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asm { mov sp, [bx] }
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#define portFIRST_CONTEXT() \
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asm { mov bx, [pxCurrentTCB] } \
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asm { mov sp, [bx] } \
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asm { pop bp } \
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asm { pop di } \
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asm { pop si } \
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asm { pop ds } \
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asm { pop es } \
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asm { pop dx } \
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asm { pop cx } \
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asm { pop bx } \
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asm { pop ax } \
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asm { iret }
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#endif
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@ -1,225 +0,0 @@
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/*
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FreeRTOS.org V4.2.1 - Copyright (C) 2003-2007 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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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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Also see http://www.SafeRTOS.com for an IEC 61508 compliant version along
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with commercial development and support options.
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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 Tern EE 186
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* port.
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*----------------------------------------------------------*/
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/* Library includes. */
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#include <embedded.h>
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#include <ae.h>
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/* Scheduler includes. */
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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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/* The timer increments every four clocks, hence the divide by 4. */
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#define portPRESCALE_VALUE ( 16 )
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#define portTIMER_COMPARE ( configCPU_CLOCK_HZ / ( configTICK_RATE_HZ * 4UL ) )
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/* From the RDC data sheet. */
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#define portENABLE_TIMER_AND_INTERRUPT ( unsigned portSHORT ) 0xe00b
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#define portENABLE_TIMER ( unsigned portSHORT ) 0xC001
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/* Interrupt control. */
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#define portEIO_REGISTER 0xff22
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#define portCLEAR_INTERRUPT 0x0008
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/* Setup the hardware to generate the required tick frequency. */
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static void prvSetupTimerInterrupt( void );
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/* The ISR used depends on whether the preemptive or cooperative scheduler
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is being used. */
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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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/*-----------------------------------------------------------*/
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/* See header file for description. */
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portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
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{
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portSTACK_TYPE DS_Reg = 0;
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/* We need the true data segment. */
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__asm{ MOV DS_Reg, DS };
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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 = 0x1111;
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pxTopOfStack--;
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*pxTopOfStack = 0x2222;
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pxTopOfStack--;
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*pxTopOfStack = 0x3333;
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pxTopOfStack--;
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/* We are going to start the scheduler using a return from interrupt
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instruction to load the program counter, so first there would be the
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function call with parameters preamble. */
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*pxTopOfStack = FP_OFF( pvParameters );
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pxTopOfStack--;
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*pxTopOfStack = FP_OFF( pxCode );
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pxTopOfStack--;
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/* Next the status register and interrupt return address. */
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*pxTopOfStack = portINITIAL_SW;
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pxTopOfStack--;
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*pxTopOfStack = FP_SEG( pxCode );
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pxTopOfStack--;
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*pxTopOfStack = FP_OFF( pxCode );
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pxTopOfStack--;
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/* The remaining registers would be pushed on the stack by our context
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switch function. These are loaded with values simply to make debugging
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easier. */
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*pxTopOfStack = ( portSTACK_TYPE ) 0xAAAA; /* AX */
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xBBBB; /* BX */
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xCCCC; /* CX */
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xDDDD; /* DX */
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xEEEE; /* ES */
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pxTopOfStack--;
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*pxTopOfStack = DS_Reg; /* DS */
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x0123; /* SI */
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xDDDD; /* DI */
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xBBBB; /* BP */
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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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/* This is called with interrupts already disabled. */
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/* Put our manual switch (yield) function on a known
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vector. */
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setvect( portSWITCH_INT_NUMBER, prvYieldProcessor );
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/* Setup the tick interrupt. */
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prvSetupTimerInterrupt();
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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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/* Should not get here! */
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return pdFALSE;
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}
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/*-----------------------------------------------------------*/
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/* The ISR used depends on whether the preemptive or cooperative scheduler
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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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portEND_SWITCHING_ISR();
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/* Reset interrupt. */
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outport( portEIO_REGISTER, portCLEAR_INTERRUPT );
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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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/* Reset interrupt. */
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outport( portEIO_REGISTER, portCLEAR_INTERRUPT );
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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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portEND_SWITCHING_ISR();
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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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static void prvSetupTimerInterrupt( void )
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{
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const unsigned portLONG ulCompareValue = portTIMER_COMPARE;
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unsigned portSHORT usTimerCompare;
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usTimerCompare = ( unsigned portSHORT ) ( ulCompareValue >> 4UL );
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t2_init( portENABLE_TIMER, portPRESCALE_VALUE, NULL );
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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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t1_init( portENABLE_TIMER_AND_INTERRUPT, usTimerCompare, usTimerCompare, prvPreemptiveTick );
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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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t1_init( portENABLE_TIMER_AND_INTERRUPT, usTimerCompare, usTimerCompare, prvNonPreemptiveTick );
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#endif
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}
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