/* FreeRTOS.org V5.1.1 - Copyright (C) 2003-2008 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 as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. 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 A special exception to the GPL can be applied should you wish to distribute a combined work that includes FreeRTOS.org, 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. *************************************************************************** *************************************************************************** * * * SAVE TIME AND MONEY! We can port FreeRTOS.org to your own hardware, * * and even write all or part of your application on your behalf. * * See http://www.OpenRTOS.com for details of the services we provide to * * expedite your project. * * * *************************************************************************** *************************************************************************** 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 portCHAR #define portBASE_TYPE char #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 1 #define portSTACK_GROWTH ( -1 ) #define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ ) #define portYIELD() __asm( "swi" ); /*-----------------------------------------------------------*/ /* Critical section handling. */ #define portENABLE_INTERRUPTS() __asm( "cli" ) #define portDISABLE_INTERRUPTS() __asm( "sei" ) /* * Disable interrupts before incrementing the count of critical section nesting. * The nesting count is maintained so we know when interrupts should be * re-enabled. Once interrupts are disabled the nesting count can be accessed * directly. Each task maintains its own nesting count. */ #define portENTER_CRITICAL() \ { \ extern volatile unsigned portBASE_TYPE uxCriticalNesting; \ \ portDISABLE_INTERRUPTS(); \ uxCriticalNesting++; \ } /* * Interrupts are disabled so we can access the nesting count directly. If the * nesting is found to be 0 (no nesting) then we are leaving the critical * section and interrupts can be re-enabled. */ #define portEXIT_CRITICAL() \ { \ extern volatile unsigned portBASE_TYPE uxCriticalNesting; \ \ uxCriticalNesting--; \ if( uxCriticalNesting == 0 ) \ { \ portENABLE_INTERRUPTS(); \ } \ } /*-----------------------------------------------------------*/ /* Task utilities. */ /* * These macros are very simple as the processor automatically saves and * restores its registers as interrupts are entered and exited. In * addition to the (automatically stacked) registers we also stack the * critical nesting count. Each task maintains its own critical nesting * count as it is legitimate for a task to yield from within a critical * section. If the banked memory model is being used then the PPAGE * register is also stored as part of the tasks context. */ #ifdef BANKED_MODEL /* * Load the stack pointer for the task, then pull the critical nesting * count and PPAGE register from the stack. The remains of the * context are restored by the RTI instruction. */ #define portRESTORE_CONTEXT() \ { \ __asm( " \n\ .globl pxCurrentTCB ; void * \n\ .globl uxCriticalNesting ; char \n\ \n\ ldx pxCurrentTCB \n\ lds 0,x ; Stack \n\ \n\ movb 1,sp+,uxCriticalNesting \n\ movb 1,sp+,0x30 ; PPAGE \n\ " ); \ } /* * By the time this macro is called the processor has already stacked the * registers. Simply stack the nesting count and PPAGE value, then save * the task stack pointer. */ #define portSAVE_CONTEXT() \ { \ __asm( " \n\ .globl pxCurrentTCB ; void * \n\ .globl uxCriticalNesting ; char \n\ \n\ movb 0x30, 1,-sp ; PPAGE \n\ movb uxCriticalNesting, 1,-sp \n\ \n\ ldx pxCurrentTCB \n\ sts 0,x ; Stack \n\ " ); \ } #else /* * These macros are as per the BANKED versions above, but without saving * and restoring the PPAGE register. */ #define portRESTORE_CONTEXT() \ { \ __asm( " \n\ .globl pxCurrentTCB ; void * \n\ .globl uxCriticalNesting ; char \n\ \n\ ldx pxCurrentTCB \n\ lds 0,x ; Stack \n\ \n\ movb 1,sp+,uxCriticalNesting \n\ " ); \ } #define portSAVE_CONTEXT() \ { \ __asm( " \n\ .globl pxCurrentTCB ; void * \n\ .globl uxCriticalNesting ; char \n\ \n\ movb uxCriticalNesting, 1,-sp \n\ \n\ ldx pxCurrentTCB \n\ sts 0,x ; Stack \n\ " ); \ } #endif /* * Utility macros to save/restore correct software registers for GCC. This is * useful when GCC does not generate appropriate ISR head/tail code. */ #define portISR_HEAD() \ { \ __asm(" \n\ movw _.frame, 2,-sp \n\ movw _.tmp, 2,-sp \n\ movw _.z, 2,-sp \n\ movw _.xy, 2,-sp \n\ ;movw _.d2, 2,-sp \n\ ;movw _.d1, 2,-sp \n\ "); \ } #define portISR_TAIL() \ { \ __asm(" \n\ movw 2,sp+, _.xy \n\ movw 2,sp+, _.z \n\ movw 2,sp+, _.tmp \n\ movw 2,sp+, _.frame \n\ ;movw 2,sp+, _.d1 \n\ ;movw 2,sp+, _.d2 \n\ rti \n\ "); \ } /* * Utility macro to call macros above in correct order in order to perform a * task switch from within a standard ISR. This macro can only be used if * the ISR does not use any local (stack) variables. If the ISR uses stack * variables portYIELD() should be used in it's place. */ #define portTASK_SWITCH_FROM_ISR() \ portSAVE_CONTEXT(); \ vTaskSwitchContext(); \ portRESTORE_CONTEXT(); /* Task function macros as described on the FreeRTOS.org WEB site. */ #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 */