From: richardbarry Date: Sat, 20 Jun 2009 19:53:16 +0000 (+0000) Subject: New port layer files. X-Git-Tag: V5.3.1~8 X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=b66bdd63f5197e01aff719f71485910b104453be;p=freertos New port layer files. git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@777 1d2547de-c912-0410-9cb9-b8ca96c0e9e2 --- diff --git a/Source/portable/CodeWarrior/ColdFire_V1/port.c b/Source/portable/CodeWarrior/ColdFire_V1/port.c new file mode 100644 index 000000000..14a92e600 --- /dev/null +++ b/Source/portable/CodeWarrior/ColdFire_V1/port.c @@ -0,0 +1,212 @@ +/* + FreeRTOS.org V5.3.0 - Copyright (C) 2003-2009 Richard Barry. + + This file is part of the FreeRTOS.org distribution. + + FreeRTOS.org is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License (version 2) as published + by the Free Software Foundation and modified by the FreeRTOS exception. + **NOTE** The exception to the GPL is included to allow you to distribute a + combined work that includes FreeRTOS.org without being obliged to provide + the source code for any proprietary components. Alternative commercial + license and support terms are also available upon request. See the + licensing section of http://www.FreeRTOS.org for full details. + + FreeRTOS.org 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.org; if not, write to the Free Software Foundation, Inc., 59 + Temple Place, Suite 330, Boston, MA 02111-1307 USA. + + + *************************************************************************** + * * + * Get the FreeRTOS eBook! See http://www.FreeRTOS.org/Documentation * + * * + * This is a concise, step by step, 'hands on' guide that describes both * + * general multitasking concepts and FreeRTOS specifics. It presents and * + * explains numerous examples that are written using the FreeRTOS API. * + * Full source code for all the examples is provided in an accompanying * + * .zip file. * + * * + *************************************************************************** + + 1 tab == 4 spaces! + + Please ensure to read the configuration and relevant port sections of the + online documentation. + + http://www.FreeRTOS.org - Documentation, latest information, license and + contact details. + + http://www.SafeRTOS.com - A version that is certified for use in safety + critical systems. + + http://www.OpenRTOS.com - Commercial support, development, porting, + licensing and training services. +*/ + +/* Kernel includes. */ +#include "FreeRTOS.h" +#include "task.h" + + +#define portINITIAL_FORMAT_VECTOR ( ( portSTACK_TYPE ) 0x4000 ) + +/* Supervisor mode set. */ +#define portINITIAL_STATUS_REGISTER ( ( portSTACK_TYPE ) 0x2000) + +/* The clock prescale into the timer peripheral. */ +#define portPRESCALE_VALUE ( ( unsigned portCHAR ) 10 ) + +/* The clock frequency into the RTC. */ +#define portRTC_CLOCK_HZ ( ( unsigned portLONG ) 1000 ) + +asm void interrupt VectorNumber_VL1swi vPortYieldISR( void ); +static void prvSetupTimerInterrupt( void ); + +/* Used to keep track of the number of nested calls to taskENTER_CRITICAL(). This +will be set to 0 prior to the first task being started. */ +static unsigned portLONG ulCriticalNesting = 0x9999UL; + +/*-----------------------------------------------------------*/ + +portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE * pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters ) +{ + +unsigned portLONG ulOriginalA5; + + __asm{ MOVE.L A5, ulOriginalA5 }; + + + *pxTopOfStack = (portSTACK_TYPE) 0xDEADBEEF; + pxTopOfStack--; + + /* Exception stack frame starts with the return address. */ + *pxTopOfStack = ( portSTACK_TYPE ) pxCode; + pxTopOfStack--; + + *pxTopOfStack = ( portINITIAL_FORMAT_VECTOR << 16UL ) | ( portINITIAL_STATUS_REGISTER ); + pxTopOfStack--; + + *pxTopOfStack = ( portSTACK_TYPE ) 0x0; /*FP*/ + pxTopOfStack -= 14; /* A5 to D0. */ + + /* Parameter in A0. */ + *( pxTopOfStack + 8 ) = ( portSTACK_TYPE ) pvParameters; + + /* A5 must be maintained as it is resurved by the compiler. */ + *( pxTopOfStack + 13 ) = ulOriginalA5; + + return pxTopOfStack; +} +/*-----------------------------------------------------------*/ + +portBASE_TYPE xPortStartScheduler( void ) +{ +extern void vPortStartFirstTask( void ); + + ulCriticalNesting = 0UL; + + /* Configure a timer to generate the tick interrupt. */ + prvSetupTimerInterrupt(); + + /* Start the first task executing. */ + vPortStartFirstTask(); + + return pdFALSE; +} +/*-----------------------------------------------------------*/ + +static void prvSetupTimerInterrupt( void ) +{ + /* Prescale by 1 - ie no prescale. */ + RTCSC |= 8; + + /* Compare match value. */ + RTCMOD = portRTC_CLOCK_HZ / configTICK_RATE_HZ; + + /* Enable the RTC to generate interrupts - interrupts are already disabled + when this code executes. */ + RTCSC_RTIE = 1; +} +/*-----------------------------------------------------------*/ + +void vPortEndScheduler( void ) +{ + /* Not implemented as there is nothing to return to. */ +} +/*-----------------------------------------------------------*/ + +void vPortEnterCritical( void ) +{ + if( ulCriticalNesting == 0UL ) + { + /* Guard against context switches being pended simultaneously with a + critical section being entered. */ + do + { + portDISABLE_INTERRUPTS(); + if( INTC_FRC == 0UL ) + { + break; + } + + portENABLE_INTERRUPTS(); + + } while( 1 ); + } + ulCriticalNesting++; +} +/*-----------------------------------------------------------*/ + +void vPortExitCritical( void ) +{ + ulCriticalNesting--; + if( ulCriticalNesting == 0 ) + { + portENABLE_INTERRUPTS(); + } +} +/*-----------------------------------------------------------*/ + +void vPortYieldHandler( void ) +{ +unsigned portLONG ulSavedInterruptMask; + + ulSavedInterruptMask = portSET_INTERRUPT_MASK_FROM_ISR(); + { + /* Note this will clear all forced interrupts - this is done for speed. */ + INTC_CFRC = 0x3E; + vTaskSwitchContext(); + } + portCLEAR_INTERRUPT_MASK_FROM_ISR( ulSavedInterruptMask ); +} +/*-----------------------------------------------------------*/ + +void interrupt VectorNumber_Vrtc vPortTickISR( void ) +{ +unsigned portLONG ulSavedInterruptMask; + + /* Clear the interrupt. */ + RTCSC |= RTCSC_RTIF_MASK; + + /* Increment the RTOS tick. */ + ulSavedInterruptMask = portSET_INTERRUPT_MASK_FROM_ISR(); + { + vTaskIncrementTick(); + } + portCLEAR_INTERRUPT_MASK_FROM_ISR( ulSavedInterruptMask ); + + /* If we are using the pre-emptive scheduler then also request a + context switch as incrementing the tick could have unblocked a task. */ + #if configUSE_PREEMPTION == 1 + { + taskYIELD(); + } + #endif +} + diff --git a/Source/portable/CodeWarrior/ColdFire_V1/portasm.S b/Source/portable/CodeWarrior/ColdFire_V1/portasm.S new file mode 100644 index 000000000..96ac65b5d --- /dev/null +++ b/Source/portable/CodeWarrior/ColdFire_V1/portasm.S @@ -0,0 +1,154 @@ +/* + FreeRTOS.org V5.3.0 - Copyright (C) 2003-2009 Richard Barry. + + This file is part of the FreeRTOS.org distribution. + + FreeRTOS.org is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License (version 2) as published + by the Free Software Foundation and modified by the FreeRTOS exception. + **NOTE** The exception to the GPL is included to allow you to distribute a + combined work that includes FreeRTOS.org without being obliged to provide + the source code for any proprietary components. Alternative commercial + license and support terms are also available upon request. See the + licensing section of http://www.FreeRTOS.org for full details. + + FreeRTOS.org 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.org; if not, write to the Free Software Foundation, Inc., 59 + Temple Place, Suite 330, Boston, MA 02111-1307 USA. + + + *************************************************************************** + * * + * Get the FreeRTOS eBook! See http://www.FreeRTOS.org/Documentation * + * * + * This is a concise, step by step, 'hands on' guide that describes both * + * general multitasking concepts and FreeRTOS specifics. It presents and * + * explains numerous examples that are written using the FreeRTOS API. * + * Full source code for all the examples is provided in an accompanying * + * .zip file. * + * * + *************************************************************************** + + 1 tab == 4 spaces! + + Please ensure to read the configuration and relevant port sections of the + online documentation. + + http://www.FreeRTOS.org - Documentation, latest information, license and + contact details. + + http://www.SafeRTOS.com - A version that is certified for use in safety + critical systems. + + http://www.OpenRTOS.com - Commercial support, development, porting, + licensing and training services. +*/ + +/* + * Purpose: Lowest level routines for all ColdFire processors. + * + * Notes: + * + * ulPortSetIPL() and mcf5xxx_wr_cacr() copied with permission from FreeScale + * supplied source files. + */ + + .global ulPortSetIPL + .global _ulPortSetIPL + .global mcf5xxx_wr_cacrx + .global _mcf5xxx_wr_cacrx + .global vPortYieldISR + .global _vPortYieldISR + .global vPortStartFirstTask + .global _vPortStartFirstTask + .extern _pxCurrentTCB + .extern _vPortYieldHandler + + .text + +.macro portSAVE_CONTEXT + + lea.l (-60, sp), sp + movem.l d0-a6, (sp) + move.l _pxCurrentTCB, a0 + move.l sp, (a0) + + .endm + +.macro portRESTORE_CONTEXT + + move.l _pxCurrentTCB, a0 + move.l (a0), sp + movem.l (sp), d0-a6 + lea.l (60, sp), sp + rte + + .endm + +/********************************************************************/ +/* + * This routines changes the IPL to the value passed into the routine. + * It also returns the old IPL value back. + * Calling convention from C: + * old_ipl = asm_set_ipl(new_ipl); + * For the Diab Data C compiler, it passes return value thru D0. + * Note that only the least significant three bits of the passed + * value are used. + */ + +ulPortSetIPL: +_ulPortSetIPL: + link A6,#-8 + movem.l D6-D7,(SP) + + move.w SR,D7 /* current sr */ + + move.l D7,D6 /* prepare return value */ + andi.l #0x0700,D6 /* mask out IPL */ + lsr.l #8,D6 /* IPL */ + + andi.l #0x07,D0 /* least significant three bits */ + lsl.l #8,D0 /* move over to make mask */ + + andi.l #0x0000F8FF,D7 /* zero out current IPL */ + or.l D0,D7 /* place new IPL in sr */ + move.w D7,SR + + move.l D6, D0 /* Return value in D0. */ + movem.l (SP),D6-D7 + lea 8(SP),SP + unlk A6 + rts +/********************************************************************/ + +mcf5xxx_wr_cacrx: +_mcf5xxx_wr_cacrx: + move.l 4(sp),d0 + .long 0x4e7b0002 /* movec d0,cacr */ + nop + rts + +/********************************************************************/ + +/* Yield interrupt. */ +_vPortYieldISR: +vPortYieldISR: + portSAVE_CONTEXT + jsr _vPortYieldHandler + portRESTORE_CONTEXT + +/********************************************************************/ + + +vPortStartFirstTask: +_vPortStartFirstTask: + portRESTORE_CONTEXT + + .end + + diff --git a/Source/portable/CodeWarrior/ColdFire_V1/portmacro.h b/Source/portable/CodeWarrior/ColdFire_V1/portmacro.h new file mode 100644 index 000000000..4df035dd7 --- /dev/null +++ b/Source/portable/CodeWarrior/ColdFire_V1/portmacro.h @@ -0,0 +1,134 @@ +/* + FreeRTOS.org V5.3.0 - Copyright (C) 2003-2009 Richard Barry. + + This file is part of the FreeRTOS.org distribution. + + FreeRTOS.org is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License (version 2) as published + by the Free Software Foundation and modified by the FreeRTOS exception. + **NOTE** The exception to the GPL is included to allow you to distribute a + combined work that includes FreeRTOS.org without being obliged to provide + the source code for any proprietary components. Alternative commercial + license and support terms are also available upon request. See the + licensing section of http://www.FreeRTOS.org for full details. + + FreeRTOS.org 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.org; if not, write to the Free Software Foundation, Inc., 59 + Temple Place, Suite 330, Boston, MA 02111-1307 USA. + + + *************************************************************************** + * * + * Get the FreeRTOS eBook! See http://www.FreeRTOS.org/Documentation * + * * + * This is a concise, step by step, 'hands on' guide that describes both * + * general multitasking concepts and FreeRTOS specifics. It presents and * + * explains numerous examples that are written using the FreeRTOS API. * + * Full source code for all the examples is provided in an accompanying * + * .zip file. * + * * + *************************************************************************** + + 1 tab == 4 spaces! + + Please ensure to read the configuration and relevant port sections of the + online documentation. + + http://www.FreeRTOS.org - Documentation, latest information, license and + contact details. + + http://www.SafeRTOS.com - A version that is certified for use in safety + critical systems. + + http://www.OpenRTOS.com - Commercial support, development, porting, + licensing and training services. +*/ + +#ifndef PORTMACRO_H +#define PORTMACRO_H + +#ifdef __cplusplus +extern "C" { +#endif + +/*----------------------------------------------------------- + * 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 double +#define portLONG long +#define portSHORT short +#define portSTACK_TYPE unsigned long +#define portBASE_TYPE long + +#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 +/*-----------------------------------------------------------*/ + +/* Hardware specifics. */ +#define portBYTE_ALIGNMENT 4 +#define portSTACK_GROWTH -1 +#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ ) +/*-----------------------------------------------------------*/ + +unsigned portLONG ulPortSetIPL( unsigned portLONG ); +#define portDISABLE_INTERRUPTS() ulPortSetIPL( configMAX_SYSCALL_INTERRUPT_PRIORITY ) +#define portENABLE_INTERRUPTS() ulPortSetIPL( 0 ) + + +extern void vPortEnterCritical( void ); +extern void vPortExitCritical( void ); +#define portENTER_CRITICAL() vPortEnterCritical() +#define portEXIT_CRITICAL() vPortExitCritical() + +extern unsigned portBASE_TYPE uxPortSetInterruptMaskFromISR( void ); +extern void vPortClearInterruptMaskFromISR( unsigned portBASE_TYPE ); +#define portSET_INTERRUPT_MASK_FROM_ISR() ulPortSetIPL( configMAX_SYSCALL_INTERRUPT_PRIORITY ) +#define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedStatusRegister ) ulPortSetIPL( uxSavedStatusRegister ) + +/*-----------------------------------------------------------*/ + +/* Task utilities. */ +#define portNOP() asm volatile ( "nop" ) + +/* Context switches are requested using the force register. */ +#define portYIELD() INTC_SFRC = 0x3E; portNOP(); portNOP(); portNOP(); portNOP(); portNOP() + +/*-----------------------------------------------------------*/ + +/* Task function macros as described on the FreeRTOS.org WEB site. */ +#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters ) __attribute__((noreturn)) +#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters ) +/*-----------------------------------------------------------*/ + +#define portEND_SWITCHING_ISR( xSwitchRequired ) if( xSwitchRequired != pdFALSE ) \ + { \ + portYIELD(); \ + } + + +#ifdef __cplusplus +} +#endif + +#endif /* PORTMACRO_H */ +