/* * FreeRTOS V4.1.1 - Copyright (C) 2003-2006 Richard Barry. * MCF5235 Port - Copyright (C) 2006 Christian Walter. * * 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. * *************************************************************************** *************************************************************************** * * * 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. * * * *************************************************************************** *************************************************************************** * * 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 /* ------------------------ Data types for Coldfire ----------------------- */ #define portCHAR char #define portFLOAT float #define portDOUBLE double #define portLONG long #define portSHORT short #define portSTACK_TYPE unsigned int #define portBASE_TYPE int typedef portSTACK_TYPE StackType_t; typedef long BaseType_t; typedef unsigned long UBaseType_t; #if ( configUSE_16_BIT_TICKS == 1 ) typedef uint16_t TickType_t; #define portMAX_DELAY ( TickType_t ) 0xffff #else typedef uint32_t TickType_t; #define portMAX_DELAY ( TickType_t ) 0xffffffffUL #endif /* ------------------------ Architecture specifics ------------------------ */ #define portSTACK_GROWTH ( -1 ) #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ ) #define portBYTE_ALIGNMENT 4 #define portTRAP_YIELD 0 /* Trap 0 */ #define portIPL_MAX 7 /* Only NMI interrupt 7 allowed. */ /* ------------------------ FreeRTOS macros for port ---------------------- */ /* * This function must be called when the current state of the active task * should be stored. It must be called immediately after exception * processing from the CPU, i.e. there exists a Coldfire exception frame at * the current position in the stack. The function reserves space on * the stack for the CPU registers and other task dependent values (e.g * ulCriticalNesting) and updates the top of the stack in the TCB. */ #define portSAVE_CONTEXT() \ asm volatile ( /* reserve space for task state. */ \ "lea.l (-64, %sp), %sp\n\t" \ /* push data register %d0-%d7/%a0-%a6 on stack. */ \ "movem.l %d0-%d7/%a0-%a6, (%sp)\n\t" \ /* push ulCriticalNesting counter on stack. */ \ "lea.l (60, %sp), %a0\n\t" \ "move.l ulCriticalNesting, (%a0)\n\t" \ /* set the new top of the stack in the TCB. */ \ "move.l pxCurrentTCB, %a0\n\t" \ "move.l %sp, (%a0)" ); /*. * This function restores the current active and continues its execution. * It loads the current TCB and restores the processor registers, the * task dependent values (e.g ulCriticalNesting). Finally execution * is continued by executing an rte instruction. */ #define portRESTORE_CONTEXT() \ asm volatile ( "move.l pxCurrentTCB, %sp\n\t" \ "move.l (%sp), %sp\n\t" \ /* stack pointer now points to the saved registers. */ \ "movem.l (%sp), %d0-%d7/%a0-%a6\n\t" \ /* restore ulCriticalNesting counter from stack. */ \ "lea.l (%sp, 60), %sp\n\t" \ "move.l (%sp)+, ulCriticalNesting\n\t" \ /* stack pointer now points to exception frame. */ \ "rte\n\t" ); #define portENTER_CRITICAL() \ vPortEnterCritical(); #define portEXIT_CRITICAL() \ vPortExitCritical(); #define portSET_IPL( xIPL ) \ asm_set_ipl( xIPL ) #define portDISABLE_INTERRUPTS() \ do { ( void ) portSET_IPL( portIPL_MAX ); } while( 0 ) #define portENABLE_INTERRUPTS() \ do { ( void ) portSET_IPL( 0 ); } while( 0 ) #define portYIELD() \ asm volatile ( " trap %0\n\t" : : "i" ( portTRAP_YIELD ) ) #define portNOP() \ asm volatile ( "nop\n\t" ) #define portENTER_SWITCHING_ISR() \ asm volatile ( "move.w #0x2700, %sr" ); \ /* Save the context of the interrupted task. */ \ portSAVE_CONTEXT(); \ { #define portEXIT_SWITCHING_ISR( SwitchRequired ) \ /* If a switch is required we call vTaskSwitchContext(). */ \ if( SwitchRequired ) \ { \ vTaskSwitchContext(); \ } \ } \ portRESTORE_CONTEXT(); /* ------------------------ Function prototypes --------------------------- */ void vPortEnterCritical( void ); void vPortExitCritical( void ); int asm_set_ipl( uint32_t int uiNewIPL ); /* ------------------------ Compiler specifics ---------------------------- */ #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) \ void vFunction( void * pvParameters ) #define portTASK_FUNCTION( vFunction, pvParameters ) \ void vFunction( void * pvParameters ) #ifdef __cplusplus } #endif #endif /* PORTMACRO_H */