| /* | |
| FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd. | |
| *************************************************************************** | |
| * * | |
| * If you are: * | |
| * * | |
| * + New to FreeRTOS, * | |
| * + Wanting to learn FreeRTOS or multitasking in general quickly * | |
| * + Looking for basic training, * | |
| * + Wanting to improve your FreeRTOS skills and productivity * | |
| * * | |
| * then take a look at the FreeRTOS books - available as PDF or paperback * | |
| * * | |
| * "Using the FreeRTOS Real Time Kernel - a Practical Guide" * | |
| * http://www.FreeRTOS.org/Documentation * | |
| * * | |
| * A pdf reference manual is also available. Both are usually delivered * | |
| * to your inbox within 20 minutes to two hours when purchased between 8am * | |
| * and 8pm GMT (although please allow up to 24 hours in case of * | |
| * exceptional circumstances). Thank you for your support! * | |
| * * | |
| *************************************************************************** | |
| 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 (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 without being obliged to provide the | |
| source code for proprietary components outside of the FreeRTOS kernel. | |
| 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 and the FreeRTOS license exception along with FreeRTOS; if not it | |
| can be viewed here: http://www.freertos.org/a00114.html and also obtained | |
| by writing to Richard Barry, contact details for whom are available on the | |
| FreeRTOS WEB site. | |
| 1 tab == 4 spaces! | |
| 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 | |
| /*----------------------------------------------------------- | |
| * 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" ); | |
| #define portNOP() __asm( "nop" ); | |
| /*-----------------------------------------------------------*/ | |
| /* 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() \ | |
| { \ | |
| extern volatile void * pxCurrentTCB; \ | |
| extern volatile unsigned portBASE_TYPE uxCriticalNesting; \ | |
| \ | |
| __asm( "ldx pxCurrentTCB" ); \ | |
| __asm( "lds 0, x" ); \ | |
| __asm( "pula" ); \ | |
| __asm( "staa uxCriticalNesting" ); \ | |
| __asm( "pula" ); \ | |
| __asm( "staa 0x30" ); /* 0x30 = PPAGE */ \ | |
| } | |
| /* | |
| * 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() \ | |
| { \ | |
| extern volatile void * pxCurrentTCB; \ | |
| extern volatile unsigned portBASE_TYPE uxCriticalNesting; \ | |
| \ | |
| __asm( "ldaa 0x30" ); /* 0x30 = PPAGE */ \ | |
| __asm( "psha" ); \ | |
| __asm( "ldaa uxCriticalNesting" ); \ | |
| __asm( "psha" ); \ | |
| __asm( "ldx pxCurrentTCB" ); \ | |
| __asm( "sts 0, x" ); \ | |
| } | |
| #else | |
| /* | |
| * These macros are as per the BANKED versions above, but without saving | |
| * and restoring the PPAGE register. | |
| */ | |
| #define portRESTORE_CONTEXT() \ | |
| { \ | |
| extern volatile void * pxCurrentTCB; \ | |
| extern volatile unsigned portBASE_TYPE uxCriticalNesting; \ | |
| \ | |
| __asm( "ldx pxCurrentTCB" ); \ | |
| __asm( "lds 0, x" ); \ | |
| __asm( "pula" ); \ | |
| __asm( "staa uxCriticalNesting" ); \ | |
| } | |
| #define portSAVE_CONTEXT() \ | |
| { \ | |
| extern volatile void * pxCurrentTCB; \ | |
| extern volatile unsigned portBASE_TYPE uxCriticalNesting; \ | |
| \ | |
| __asm( "ldaa uxCriticalNesting" ); \ | |
| __asm( "psha" ); \ | |
| __asm( "ldx pxCurrentTCB" ); \ | |
| __asm( "sts 0, x" ); \ | |
| } | |
| #endif | |
| /* | |
| * 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 ) | |
| #endif /* PORTMACRO_H */ | |