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New port files for Tern E-Engine.

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pull/4/head
Richard Barry 19 years ago
parent 4202a62517
commit 210d5beaae
8 changed files with 1096 additions and 0 deletions
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220
Source/portable/Paradigm/Tern_EE/large_untested/port.c
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/*
FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FreeRTOS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FreeRTOS; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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.
***************************************************************************
See http://www.FreeRTOS.org for documentation, latest information, license
and contact details. Please ensure to read the configuration and relevant
port sections of the online documentation.
***************************************************************************
*/
/*-----------------------------------------------------------
* Implementation of functions defined in portable.h for the Tern EE 186
* port.
*----------------------------------------------------------*/
/* Library includes. */
#include <embedded.h>
#include <ae.h>
/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "portasm.h"
/* The timer increments every four clocks, hence the divide by 4. */
#define portTIMER_COMPARE ( unsigned portSHORT ) ( ( configCPU_CLOCK_HZ / configTICK_RATE_HZ ) / ( unsigned portLONG ) 4 )
/* From the RDC data sheet. */
#define portENABLE_TIMER_AND_INTERRUPT ( unsigned portSHORT ) 0xe001
/* Interrupt control. */
#define portEIO_REGISTER 0xff22
#define portCLEAR_INTERRUPT 0x0008
/* Setup the hardware to generate the required tick frequency. */
static void prvSetupTimerInterrupt( void );
/* The ISR used depends on whether the preemptive or cooperative scheduler
is being used. */
#if( configUSE_PREEMPTION == 1 )
/* Tick service routine used by the scheduler when preemptive scheduling is
being used. */
static void __interrupt __far prvPreemptiveTick( void );
#else
/* Tick service routine used by the scheduler when cooperative scheduling is
being used. */
static void __interrupt __far prvNonPreemptiveTick( void );
#endif
/* Trap routine used by taskYIELD() to manually cause a context switch. */
static void __interrupt __far prvYieldProcessor( void );
/*-----------------------------------------------------------*/
/* See header file for description. */
portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
{
portSTACK_TYPE DS_Reg = 0;
/* Place a few bytes of known values on the bottom of the stack.
This is just useful for debugging. */
*pxTopOfStack = 0x1111;
pxTopOfStack--;
*pxTopOfStack = 0x2222;
pxTopOfStack--;
*pxTopOfStack = 0x3333;
pxTopOfStack--;
/* We are going to start the scheduler using a return from interrupt
instruction to load the program counter, so first there would be the
function call with parameters preamble. */
*pxTopOfStack = FP_SEG( pvParameters );
pxTopOfStack--;
*pxTopOfStack = FP_OFF( pvParameters );
pxTopOfStack--;
*pxTopOfStack = FP_SEG( pxCode );
pxTopOfStack--;
*pxTopOfStack = FP_OFF( pxCode );
pxTopOfStack--;
/* Next the status register and interrupt return address. */
*pxTopOfStack = portINITIAL_SW;
pxTopOfStack--;
*pxTopOfStack = FP_SEG( pxCode );
pxTopOfStack--;
*pxTopOfStack = FP_OFF( pxCode );
pxTopOfStack--;
/* The remaining registers would be pushed on the stack by our context
switch function. These are loaded with values simply to make debugging
easier. */
*pxTopOfStack = ( portSTACK_TYPE ) 0xAAAA; /* AX */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xBBBB; /* BX */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xCCCC; /* CX */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xDDDD; /* DX */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xEEEE; /* ES */
pxTopOfStack--;
/* We need the true data segment. */
__asm{ MOV DS_Reg, DS };
*pxTopOfStack = DS_Reg; /* DS */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x0123; /* SI */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xDDDD; /* DI */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xBBBB; /* BP */
return pxTopOfStack;
}
/*-----------------------------------------------------------*/
portBASE_TYPE xPortStartScheduler( void )
{
/* This is called with interrupts already disabled. */
/* Put our manual switch (yield) function on a known
vector. */
setvect( portSWITCH_INT_NUMBER, prvYieldProcessor );
/* Setup the tick interrupt. */
prvSetupTimerInterrupt();
/* Kick off the scheduler by setting up the context of the first task. */
portFIRST_CONTEXT();
/* Should not get here! */
return pdFALSE;
}
/*-----------------------------------------------------------*/
/* The ISR used depends on whether the preemptive or cooperative scheduler
is being used. */
#if( configUSE_PREEMPTION == 1 )
static void __interrupt __far prvPreemptiveTick( void )
{
/* Get the scheduler to update the task states following the tick. */
vTaskIncrementTick();
/* Switch in the context of the next task to be run. */
portSWITCH_CONTEXT();
/* Reset interrupt. */
outport( portEIO_REGISTER, portCLEAR_INTERRUPT );
}
#else
static void __interrupt __far prvNonPreemptiveTick( void )
{
/* Same as preemptive tick, but the cooperative scheduler is being used
so we don't have to switch in the context of the next task. */
vTaskIncrementTick();
/* Reset interrupt. */
outport( portEIO_REGISTER, portCLEAR_INTERRUPT );
}
#endif
/*-----------------------------------------------------------*/
static void __interrupt __far prvYieldProcessor( void )
{
/* Switch in the context of the next task to be run. */
portSWITCH_CONTEXT();
}
/*-----------------------------------------------------------*/
void vPortEndScheduler( void )
{
/* Not implemented. */
}
/*-----------------------------------------------------------*/
static void prvSetupTimerInterrupt( void )
{
const unsigned portSHORT usTimerACompare = portTIMER_COMPARE, usTimerAMode = portENABLE_TIMER_AND_INTERRUPT;
#if( configUSE_PREEMPTION == 1 )
/* Tick service routine used by the scheduler when preemptive scheduling is
being used. */
t2_init( usTimerAMode, usTimerACompare, prvPreemptiveTick );
#else
/* Tick service routine used by the scheduler when cooperative scheduling is
being used. */
t2_init( usTimerAMode, usTimerACompare, prvNonPreemptiveTick );
#endif
}

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Source/portable/Paradigm/Tern_EE/large_untested/portasm.h
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/*
FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FreeRTOS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FreeRTOS; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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.
***************************************************************************
See http://www.FreeRTOS.org for documentation, latest information, license
and contact details. Please ensure to read the configuration and relevant
port sections of the online documentation.
***************************************************************************
*/
typedef void tskTCB;
extern volatile tskTCB * volatile pxCurrentTCB;
extern void vTaskSwitchContext( void );
/*
* Saves the stack pointer for one task into its TCB, calls
* vTaskSwitchContext() to update the TCB being used, then restores the stack
* from the new TCB read to run the task.
*/
void portSWITCH_CONTEXT( void );
/*
* Load the stack pointer from the TCB of the task which is going to be first
* to execute. Then force an IRET so the registers and IP are popped off the
* stack.
*/
void portFIRST_CONTEXT( void );
#define portSWITCH_CONTEXT()
// asm { mov ax, seg pxCurrentTCB }
// asm { mov ds, ax }
// asm { les bx, pxCurrentTCB } /* Save the stack pointer into the TCB. */
// asm { mov es:0x2[ bx ], ss }
// asm { mov es:[ bx ], sp }
// asm { call far ptr vTaskSwitchContext } /* Perform the switch. */
// asm { mov ax, seg pxCurrentTCB } /* Restore the stack pointer from the TCB. */
// asm { mov ds, ax }
// asm { les bx, dword ptr pxCurrentTCB }
// asm { mov ss, es:[ bx + 2 ] }
// asm { mov sp, es:[ bx ] }
#define portFIRST_CONTEXT() \
asm { mov ax, seg pxCurrentTCB } \
asm { mov ds, ax } \
asm { les bx, dword ptr pxCurrentTCB } \
asm { mov ss, es:[ bx + 2 ] } \
asm { mov sp, es:[ bx ] } \
asm { pop bx } \
asm { pop di } \
asm { pop si } \
asm { pop ds } \
asm { pop es } \
asm { pop dx } \
asm { pop cx } \
asm { pop bx } \
asm { pop ax } \
asm { iret }

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Source/portable/Paradigm/Tern_EE/large_untested/portmacro.h
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/*
FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FreeRTOS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FreeRTOS; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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.
***************************************************************************
See http://www.FreeRTOS.org for documentation, latest information, license
and contact details. Please ensure to read the configuration and relevant
port sections of the online documentation.
***************************************************************************
*/
#ifndef PORTMACRO_H
#define PORTMACRO_H
/*-----------------------------------------------------------
* Port specific definitions.
*
* The settings in this file configure FreeRTOS correctly for the
* given hardware and compiler.
*
* These settings should not be altered.
*-----------------------------------------------------------
*/
/* Type definitions. */
#define portCHAR char
#define portFLOAT float
#define portDOUBLE long
#define portLONG long
#define portSHORT int
#define portSTACK_TYPE unsigned portSHORT
#define portBASE_TYPE portSHORT
#if( configUSE_16_BIT_TICKS == 1 )
typedef unsigned portSHORT portTickType;
#define portMAX_DELAY ( portTickType ) 0xffff
#else
typedef unsigned portLONG portTickType;
#define portMAX_DELAY ( portTickType ) 0xffffffff
#endif
/*-----------------------------------------------------------*/
/* Critical section handling. */
#define portENTER_CRITICAL() __asm{ pushf } \
__asm{ cli } \
#define portEXIT_CRITICAL() __asm{ popf }
#define portDISABLE_INTERRUPTS() __asm{ cli }
#define portENABLE_INTERRUPTS() __asm{ sti }
/*-----------------------------------------------------------*/
/* Hardware specifics. */
#define portNOP() __asm{ nop }
#define portSTACK_GROWTH ( -1 )
#define portSWITCH_INT_NUMBER 0x80
#define portYIELD() __asm{ int portSWITCH_INT_NUMBER }
#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ )
#define portBYTE_ALIGNMENT 2
#define portINITIAL_SW ( ( portSTACK_TYPE ) 0x0202 ) /* Start the tasks with interrupts enabled. */
/*-----------------------------------------------------------*/
/* Compiler specifics. */
#define portINPUT_BYTE( xAddr ) inp( xAddr )
#define portOUTPUT_BYTE( xAddr, ucValue ) outp( xAddr, ucValue )
#define portINPUT_WORD( xAddr ) inpw( xAddr )
#define portOUTPUT_WORD( xAddr, usValue ) outpw( xAddr, usValue )
#define inline
/*-----------------------------------------------------------*/
/* Task function macros as described on the FreeRTOS.org WEB site. */
#define portTASK_FUNCTION_PROTO( vTaskFunction, vParameters ) void vTaskFunction( void *pvParameters )
#define portTASK_FUNCTION( vTaskFunction, vParameters ) void vTaskFunction( void *pvParameters )
#endif /* PORTMACRO_H */

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Source/portable/Paradigm/Tern_EE/small/PORTASM.bak
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/*
FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FreeRTOS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FreeRTOS; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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.
***************************************************************************
See http://www.FreeRTOS.org for documentation, latest information, license
and contact details. Please ensure to read the configuration and relevant
port sections of the online documentation.
***************************************************************************
*/
#ifndef PORT_ASM_H
#define PORT_ASM_H
typedef void tskTCB;
extern volatile tskTCB * volatile pxCurrentTCB;
extern void vTaskSwitchContext( void );
/*
* Saves the stack pointer for one task into its TCB, calls
* vTaskSwitchContext() to update the TCB being used, then restores the stack
* from the new TCB read to run the task.
*/
void portSWITCH_CONTEXT( void );
/*
* Load the stack pointer from the TCB of the task which is going to be first
* to execute. Then force an IRET so the registers and IP are popped off the
* stack.
*/
void portFIRST_CONTEXT( void );
#define portSWITCH_CONTEXT() \
asm { mov bx, [pxCurrentTCB] } \
asm { mov word ptr [bx], sp } \
asm { call far ptr vTaskSwitchContext } \
asm { mov bx, [pxCurrentTCB] } \
asm { mov sp, [bx] }
#define portFIRST_CONTEXT() \
asm { mov bx, [pxCurrentTCB] } \
asm { mov sp, [bx] } \
asm { pop bp } \
asm { pop di } \
asm { pop si } \
asm { pop ds } \
asm { pop es } \
asm { pop dx } \
asm { pop cx } \
asm { pop bx } \
asm { pop ax } \
asm { iret }
#endif

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Source/portable/Paradigm/Tern_EE/small/port.bak
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/*
FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FreeRTOS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FreeRTOS; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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.
***************************************************************************
See http://www.FreeRTOS.org for documentation, latest information, license
and contact details. Please ensure to read the configuration and relevant
port sections of the online documentation.
***************************************************************************
*/
/*-----------------------------------------------------------
* Implementation of functions defined in portable.h for the Tern EE 186
* port.
*----------------------------------------------------------*/
/* Library includes. */
#include <embedded.h>
#include <ae.h>
/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "portasm.h"
/* The timer increments every four clocks, hence the divide by 4. */
#define portPRESCALE_VALUE ( 16 )
#define portTIMER_COMPARE ( configCPU_CLOCK_HZ / ( configTICK_RATE_HZ * 4UL ) )
/* From the RDC data sheet. */
#define portENABLE_TIMER_AND_INTERRUPT ( unsigned portSHORT ) 0xe00b
#define portENABLE_TIMER ( unsigned portSHORT ) 0xC001
/* Interrupt control. */
#define portEIO_REGISTER 0xff22
#define portCLEAR_INTERRUPT 0x0008
/* Setup the hardware to generate the required tick frequency. */
static void prvSetupTimerInterrupt( void );
/* The ISR used depends on whether the preemptive or cooperative scheduler
is being used. */
#if( configUSE_PREEMPTION == 1 )
/* Tick service routine used by the scheduler when preemptive scheduling is
being used. */
static void __interrupt __far prvPreemptiveTick( void );
#else
/* Tick service routine used by the scheduler when cooperative scheduling is
being used. */
static void __interrupt __far prvNonPreemptiveTick( void );
#endif
/* Trap routine used by taskYIELD() to manually cause a context switch. */
static void __interrupt __far prvYieldProcessor( void );
/*-----------------------------------------------------------*/
/* See header file for description. */
portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
{
portSTACK_TYPE DS_Reg = 0;
/* We need the true data segment. */
__asm{ MOV DS_Reg, DS };
/* Place a few bytes of known values on the bottom of the stack.
This is just useful for debugging. */
*pxTopOfStack = 0x1111;
pxTopOfStack--;
*pxTopOfStack = 0x2222;
pxTopOfStack--;
*pxTopOfStack = 0x3333;
pxTopOfStack--;
/* We are going to start the scheduler using a return from interrupt
instruction to load the program counter, so first there would be the
function call with parameters preamble. */
*pxTopOfStack = FP_OFF( pvParameters );
pxTopOfStack--;
*pxTopOfStack = FP_OFF( pxCode );
pxTopOfStack--;
/* Next the status register and interrupt return address. */
*pxTopOfStack = portINITIAL_SW;
pxTopOfStack--;
*pxTopOfStack = FP_SEG( pxCode );
pxTopOfStack--;
*pxTopOfStack = FP_OFF( pxCode );
pxTopOfStack--;
/* The remaining registers would be pushed on the stack by our context
switch function. These are loaded with values simply to make debugging
easier. */
*pxTopOfStack = ( portSTACK_TYPE ) 0xAAAA; /* AX */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xBBBB; /* BX */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xCCCC; /* CX */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xDDDD; /* DX */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xEEEE; /* ES */
pxTopOfStack--;
*pxTopOfStack = DS_Reg; /* DS */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x0123; /* SI */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xDDDD; /* DI */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xBBBB; /* BP */
return pxTopOfStack;
}
/*-----------------------------------------------------------*/
portBASE_TYPE xPortStartScheduler( void )
{
/* This is called with interrupts already disabled. */
/* Put our manual switch (yield) function on a known
vector. */
setvect( portSWITCH_INT_NUMBER, prvYieldProcessor );
/* Setup the tick interrupt. */
prvSetupTimerInterrupt();
/* Kick off the scheduler by setting up the context of the first task. */
portFIRST_CONTEXT();
/* Should not get here! */
return pdFALSE;
}
/*-----------------------------------------------------------*/
/* The ISR used depends on whether the preemptive or cooperative scheduler
is being used. */
#if( configUSE_PREEMPTION == 1 )
static void __interrupt __far prvPreemptiveTick( void )
{
/* Get the scheduler to update the task states following the tick. */
vTaskIncrementTick();
/* Switch in the context of the next task to be run. */
portEND_SWITCHING_ISR();
/* Reset interrupt. */
outport( portEIO_REGISTER, portCLEAR_INTERRUPT );
}
#else
static void __interrupt __far prvNonPreemptiveTick( void )
{
/* Same as preemptive tick, but the cooperative scheduler is being used
so we don't have to switch in the context of the next task. */
vTaskIncrementTick();
/* Reset interrupt. */
outport( portEIO_REGISTER, portCLEAR_INTERRUPT );
}
#endif
/*-----------------------------------------------------------*/
static void __interrupt __far prvYieldProcessor( void )
{
/* Switch in the context of the next task to be run. */
portEND_SWITCHING_ISR();
}
/*-----------------------------------------------------------*/
void vPortEndScheduler( void )
{
/* Not implemented. */
}
/*-----------------------------------------------------------*/
static void prvSetupTimerInterrupt( void )
{
const unsigned portLONG ulCompareValue = portTIMER_COMPARE;
unsigned portSHORT usTimerCompare;
usTimerCompare = ( unsigned portSHORT ) ( ulCompareValue >> 4UL );
t2_init( portENABLE_TIMER, portPRESCALE_VALUE, NULL );
#if( configUSE_PREEMPTION == 1 )
/* Tick service routine used by the scheduler when preemptive scheduling is
being used. */
t1_init( portENABLE_TIMER_AND_INTERRUPT, usTimerCompare, usTimerCompare, prvPreemptiveTick );
#else
/* Tick service routine used by the scheduler when cooperative scheduling is
being used. */
t1_init( portENABLE_TIMER_AND_INTERRUPT, usTimerCompare, usTimerCompare, prvNonPreemptiveTick );
#endif
}

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Source/portable/Paradigm/Tern_EE/small/port.c
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/*
FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FreeRTOS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FreeRTOS; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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.
***************************************************************************
See http://www.FreeRTOS.org for documentation, latest information, license
and contact details. Please ensure to read the configuration and relevant
port sections of the online documentation.
***************************************************************************
*/
/*-----------------------------------------------------------
* Implementation of functions defined in portable.h for the Tern EE 186
* port.
*----------------------------------------------------------*/
/* Library includes. */
#include <embedded.h>
#include <ae.h>
/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "portasm.h"
/* The timer increments every four clocks, hence the divide by 4. */
#define portPRESCALE_VALUE ( 16 )
#define portTIMER_COMPARE ( configCPU_CLOCK_HZ / ( configTICK_RATE_HZ * 4UL ) )
/* From the RDC data sheet. */
#define portENABLE_TIMER_AND_INTERRUPT ( unsigned portSHORT ) 0xe00b
#define portENABLE_TIMER ( unsigned portSHORT ) 0xC001
/* Interrupt control. */
#define portEIO_REGISTER 0xff22
#define portCLEAR_INTERRUPT 0x0008
/* Setup the hardware to generate the required tick frequency. */
static void prvSetupTimerInterrupt( void );
/* The ISR used depends on whether the preemptive or cooperative scheduler
is being used. */
#if( configUSE_PREEMPTION == 1 )
/* Tick service routine used by the scheduler when preemptive scheduling is
being used. */
static void __interrupt __far prvPreemptiveTick( void );
#else
/* Tick service routine used by the scheduler when cooperative scheduling is
being used. */
static void __interrupt __far prvNonPreemptiveTick( void );
#endif
/* Trap routine used by taskYIELD() to manually cause a context switch. */
static void __interrupt __far prvYieldProcessor( void );
/*-----------------------------------------------------------*/
/* See header file for description. */
portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
{
portSTACK_TYPE DS_Reg = 0;
/* We need the true data segment. */
__asm{ MOV DS_Reg, DS };
/* Place a few bytes of known values on the bottom of the stack.
This is just useful for debugging. */
*pxTopOfStack = 0x1111;
pxTopOfStack--;
*pxTopOfStack = 0x2222;
pxTopOfStack--;
*pxTopOfStack = 0x3333;
pxTopOfStack--;
/* We are going to start the scheduler using a return from interrupt
instruction to load the program counter, so first there would be the
function call with parameters preamble. */
*pxTopOfStack = FP_OFF( pvParameters );
pxTopOfStack--;
*pxTopOfStack = FP_OFF( pxCode );
pxTopOfStack--;
/* Next the status register and interrupt return address. */
*pxTopOfStack = portINITIAL_SW;
pxTopOfStack--;
*pxTopOfStack = FP_SEG( pxCode );
pxTopOfStack--;
*pxTopOfStack = FP_OFF( pxCode );
pxTopOfStack--;
/* The remaining registers would be pushed on the stack by our context
switch function. These are loaded with values simply to make debugging
easier. */
*pxTopOfStack = ( portSTACK_TYPE ) 0xAAAA; /* AX */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xBBBB; /* BX */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xCCCC; /* CX */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xDDDD; /* DX */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xEEEE; /* ES */
pxTopOfStack--;
*pxTopOfStack = DS_Reg; /* DS */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0x0123; /* SI */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xDDDD; /* DI */
pxTopOfStack--;
*pxTopOfStack = ( portSTACK_TYPE ) 0xBBBB; /* BP */
return pxTopOfStack;
}
/*-----------------------------------------------------------*/
portBASE_TYPE xPortStartScheduler( void )
{
/* This is called with interrupts already disabled. */
/* Put our manual switch (yield) function on a known
vector. */
setvect( portSWITCH_INT_NUMBER, prvYieldProcessor );
/* Setup the tick interrupt. */
prvSetupTimerInterrupt();
/* Kick off the scheduler by setting up the context of the first task. */
portFIRST_CONTEXT();
/* Should not get here! */
return pdFALSE;
}
/*-----------------------------------------------------------*/
/* The ISR used depends on whether the preemptive or cooperative scheduler
is being used. */
#if( configUSE_PREEMPTION == 1 )
static void __interrupt __far prvPreemptiveTick( void )
{
/* Get the scheduler to update the task states following the tick. */
vTaskIncrementTick();
/* Switch in the context of the next task to be run. */
portEND_SWITCHING_ISR();
/* Reset interrupt. */
outport( portEIO_REGISTER, portCLEAR_INTERRUPT );
}
#else
static void __interrupt __far prvNonPreemptiveTick( void )
{
/* Same as preemptive tick, but the cooperative scheduler is being used
so we don't have to switch in the context of the next task. */
vTaskIncrementTick();
/* Reset interrupt. */
outport( portEIO_REGISTER, portCLEAR_INTERRUPT );
}
#endif
/*-----------------------------------------------------------*/
static void __interrupt __far prvYieldProcessor( void )
{
/* Switch in the context of the next task to be run. */
portEND_SWITCHING_ISR();
}
/*-----------------------------------------------------------*/
void vPortEndScheduler( void )
{
/* Not implemented. */
}
/*-----------------------------------------------------------*/
static void prvSetupTimerInterrupt( void )
{
const unsigned portLONG ulCompareValue = portTIMER_COMPARE;
unsigned portSHORT usTimerCompare;
usTimerCompare = ( unsigned portSHORT ) ( ulCompareValue >> 4 );
t2_init( portENABLE_TIMER, portPRESCALE_VALUE, NULL );
#if( configUSE_PREEMPTION == 1 )
/* Tick service routine used by the scheduler when preemptive scheduling is
being used. */
t1_init( portENABLE_TIMER_AND_INTERRUPT, usTimerCompare, usTimerCompare, prvPreemptiveTick );
#else
/* Tick service routine used by the scheduler when cooperative scheduling is
being used. */
t1_init( portENABLE_TIMER_AND_INTERRUPT, usTimerCompare, usTimerCompare, prvNonPreemptiveTick );
#endif
}

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Source/portable/Paradigm/Tern_EE/small/portasm.h
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/*
FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FreeRTOS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FreeRTOS; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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.
***************************************************************************
See http://www.FreeRTOS.org for documentation, latest information, license
and contact details. Please ensure to read the configuration and relevant
port sections of the online documentation.
***************************************************************************
*/
#ifndef PORT_ASM_H
#define PORT_ASM_H
typedef void tskTCB;
extern volatile tskTCB * volatile pxCurrentTCB;
extern void vTaskSwitchContext( void );
/*
* Saves the stack pointer for one task into its TCB, calls
* vTaskSwitchContext() to update the TCB being used, then restores the stack
* from the new TCB read to run the task.
*/
void portEND_SWITCHING_ISR( void );
/*
* Load the stack pointer from the TCB of the task which is going to be first
* to execute. Then force an IRET so the registers and IP are popped off the
* stack.
*/
void portFIRST_CONTEXT( void );
#define portEND_SWITCHING_ISR() \
asm { mov bx, [pxCurrentTCB] } \
asm { mov word ptr [bx], sp } \
asm { call far ptr vTaskSwitchContext } \
asm { mov bx, [pxCurrentTCB] } \
asm { mov sp, [bx] }
#define portFIRST_CONTEXT() \
asm { mov bx, [pxCurrentTCB] } \
asm { mov sp, [bx] } \
asm { pop bp } \
asm { pop di } \
asm { pop si } \
asm { pop ds } \
asm { pop es } \
asm { pop dx } \
asm { pop cx } \
asm { pop bx } \
asm { pop ax } \
asm { iret }
#endif

100
Source/portable/Paradigm/Tern_EE/small/portmacro.h
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/*
FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FreeRTOS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FreeRTOS; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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.
***************************************************************************
See http://www.FreeRTOS.org for documentation, latest information, license
and contact details. Please ensure to read the configuration and relevant
port sections of the online documentation.
***************************************************************************
*/
#ifndef PORTMACRO_H
#define PORTMACRO_H
/*-----------------------------------------------------------
* Port specific definitions.
*
* The settings in this file configure FreeRTOS correctly for the
* given hardware and compiler.
*
* These settings should not be altered.
*-----------------------------------------------------------
*/
/* Type definitions. */
#define portCHAR char
#define portFLOAT float
#define portDOUBLE long
#define portLONG long
#define portSHORT int
#define portSTACK_TYPE unsigned portSHORT
#define portBASE_TYPE portSHORT
typedef void ( __interrupt __far *pxISR )();
#if( configUSE_16_BIT_TICKS == 1 )
typedef unsigned portSHORT portTickType;
#define portMAX_DELAY ( portTickType ) 0xffff
#else
typedef unsigned portLONG portTickType;
#define portMAX_DELAY ( portTickType ) 0xffffffff
#endif
/*-----------------------------------------------------------*/
/* Critical section handling. */
#define portENTER_CRITICAL() __asm{ pushf } \
__asm{ cli } \
#define portEXIT_CRITICAL() __asm{ popf }
#define portDISABLE_INTERRUPTS() __asm{ cli }
#define portENABLE_INTERRUPTS() __asm{ sti }
/*-----------------------------------------------------------*/
/* Hardware specifics. */
#define portNOP() __asm{ nop }
#define portSTACK_GROWTH ( -1 )
#define portSWITCH_INT_NUMBER 0x80
#define portYIELD() __asm{ int portSWITCH_INT_NUMBER }
#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ )
#define portBYTE_ALIGNMENT 2
#define portINITIAL_SW ( ( portSTACK_TYPE ) 0x0202 ) /* Start the tasks with interrupts enabled. */
/*-----------------------------------------------------------*/
/* Compiler specifics. */
#define portINPUT_BYTE( xAddr ) inp( xAddr )
#define portOUTPUT_BYTE( xAddr, ucValue ) outp( xAddr, ucValue )
#define portINPUT_WORD( xAddr ) inpw( xAddr )
#define portOUTPUT_WORD( xAddr, usValue ) outpw( xAddr, usValue )
#define inline
/*-----------------------------------------------------------*/
/* Task function macros as described on the FreeRTOS.org WEB site. */
#define portTASK_FUNCTION_PROTO( vTaskFunction, vParameters ) void vTaskFunction( void *pvParameters )
#define portTASK_FUNCTION( vTaskFunction, vParameters ) void vTaskFunction( void *pvParameters )
#endif /* PORTMACRO_H */
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