From: richardbarry Date: Sat, 27 May 2006 13:59:20 +0000 (+0000) Subject: New port files for Tern E-Engine. X-Git-Tag: V4.0.2~3 X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=a00bca5debc3e25cacdc82a0f4e155b249de07c1;p=freertos New port files for Tern E-Engine. git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@9 1d2547de-c912-0410-9cb9-b8ca96c0e9e2 --- diff --git a/Source/portable/Paradigm/Tern_EE/large_untested/port.c b/Source/portable/Paradigm/Tern_EE/large_untested/port.c new file mode 100644 index 000000000..23efd540c --- /dev/null +++ b/Source/portable/Paradigm/Tern_EE/large_untested/port.c @@ -0,0 +1,220 @@ +/* + 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 +#include + +/* 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 +} + + + + + + + diff --git a/Source/portable/Paradigm/Tern_EE/large_untested/portasm.h b/Source/portable/Paradigm/Tern_EE/large_untested/portasm.h new file mode 100644 index 000000000..0ea24897d --- /dev/null +++ b/Source/portable/Paradigm/Tern_EE/large_untested/portasm.h @@ -0,0 +1,81 @@ +/* + 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 } + + diff --git a/Source/portable/Paradigm/Tern_EE/large_untested/portmacro.h b/Source/portable/Paradigm/Tern_EE/large_untested/portmacro.h new file mode 100644 index 000000000..b2abfd9cf --- /dev/null +++ b/Source/portable/Paradigm/Tern_EE/large_untested/portmacro.h @@ -0,0 +1,98 @@ +/* + 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 */ + diff --git a/Source/portable/Paradigm/Tern_EE/small/PORTASM.bak b/Source/portable/Paradigm/Tern_EE/small/PORTASM.bak new file mode 100644 index 000000000..1f01b288d --- /dev/null +++ b/Source/portable/Paradigm/Tern_EE/small/PORTASM.bak @@ -0,0 +1,76 @@ +/* + 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 diff --git a/Source/portable/Paradigm/Tern_EE/small/port.bak b/Source/portable/Paradigm/Tern_EE/small/port.bak new file mode 100644 index 000000000..9e4df818d --- /dev/null +++ b/Source/portable/Paradigm/Tern_EE/small/port.bak @@ -0,0 +1,222 @@ +/* + 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 +#include + +/* 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 +} + + + + + + + diff --git a/Source/portable/Paradigm/Tern_EE/small/port.c b/Source/portable/Paradigm/Tern_EE/small/port.c new file mode 100644 index 000000000..40c61f519 --- /dev/null +++ b/Source/portable/Paradigm/Tern_EE/small/port.c @@ -0,0 +1,222 @@ +/* + 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 +#include + +/* 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 +} + + + + + + + diff --git a/Source/portable/Paradigm/Tern_EE/small/portasm.h b/Source/portable/Paradigm/Tern_EE/small/portasm.h new file mode 100644 index 000000000..af755538f --- /dev/null +++ b/Source/portable/Paradigm/Tern_EE/small/portasm.h @@ -0,0 +1,77 @@ +/* + 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 + diff --git a/Source/portable/Paradigm/Tern_EE/small/portmacro.h b/Source/portable/Paradigm/Tern_EE/small/portmacro.h new file mode 100644 index 000000000..e1786de84 --- /dev/null +++ b/Source/portable/Paradigm/Tern_EE/small/portmacro.h @@ -0,0 +1,100 @@ +/* + 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 */ +