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jeremybenn |
/*
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FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.
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***************************************************************************
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* *
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* If you are: *
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* *
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* + New to FreeRTOS, *
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* + Wanting to learn FreeRTOS or multitasking in general quickly *
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* + Looking for basic training, *
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* + Wanting to improve your FreeRTOS skills and productivity *
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* *
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* then take a look at the FreeRTOS books - available as PDF or paperback *
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* *
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* "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
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* http://www.FreeRTOS.org/Documentation *
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* *
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* A pdf reference manual is also available. Both are usually delivered *
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* to your inbox within 20 minutes to two hours when purchased between 8am *
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* and 8pm GMT (although please allow up to 24 hours in case of *
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* exceptional circumstances). Thank you for your support! *
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* *
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***************************************************************************
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This file is part of the FreeRTOS distribution.
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FreeRTOS is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License (version 2) as published by the
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Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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***NOTE*** The exception to the GPL is included to allow you to distribute
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a combined work that includes FreeRTOS without being obliged to provide the
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source code for proprietary components outside of the FreeRTOS kernel.
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FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details. You should have received a copy of the GNU General Public
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License and the FreeRTOS license exception along with FreeRTOS; if not it
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can be viewed here: http://www.freertos.org/a00114.html and also obtained
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by writing to Richard Barry, contact details for whom are available on the
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FreeRTOS WEB site.
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1 tab == 4 spaces!
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http://www.FreeRTOS.org - Documentation, latest information, license and
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contact details.
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http://www.SafeRTOS.com - A version that is certified for use in safety
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critical systems.
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http://www.OpenRTOS.com - Commercial support, development, porting,
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licensing and training services.
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*/
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#ifndef PORTMACRO_H
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#define PORTMACRO_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <machine/ic.h>
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/*-----------------------------------------------------------
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* Port specific definitions.
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*
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* The settings in this file configure FreeRTOS correctly for the
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* given hardware and compiler.
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*
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* These settings should not be altered.
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*-----------------------------------------------------------
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*/
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/* Type definitions. */
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#define portCHAR char
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#define portFLOAT float
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#define portDOUBLE double
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#define portLONG long
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#define portSHORT short
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#define portSTACK_TYPE unsigned portLONG
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#define portBASE_TYPE portLONG
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#if( configUSE_16_BIT_TICKS == 1 )
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typedef unsigned portSHORT portTickType;
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#define portMAX_DELAY ( portTickType ) 0xffff
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#else
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typedef unsigned portLONG portTickType;
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#define portMAX_DELAY ( portTickType ) 0xffffffff
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#endif
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/*-----------------------------------------------------------*/
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/* Architecture specifics. */
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#define portSTACK_GROWTH ( -1 )
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#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ )
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#define portBYTE_ALIGNMENT 4
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#define portNOP() __asm__ volatile ( "mov r0, r0" )
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#define portCRITICAL_NESTING_IN_TCB 1
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#define portIRQ_TRAP_YIELD 31
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#define portKERNEL_INTERRUPT_PRIORITY_LEVEL 0
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#define portSYSTEM_INTERRUPT_PRIORITY_LEVEL 0
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/*-----------------------------------------------------------*/
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/* Task utilities. */
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extern void vPortYield( void );
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/*---------------------------------------------------------------------------*/
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#define portYIELD() asm __volatile__( " trap #%0 "::"i"(portIRQ_TRAP_YIELD):"memory")
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/*---------------------------------------------------------------------------*/
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extern void vTaskEnterCritical( void );
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extern void vTaskExitCritical( void );
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#define portENTER_CRITICAL() vTaskEnterCritical()
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#define portEXIT_CRITICAL() vTaskExitCritical()
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/*---------------------------------------------------------------------------*/
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/* Critical section management. */
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#define portDISABLE_INTERRUPTS() ic->cpl = ( portSYSTEM_INTERRUPT_PRIORITY_LEVEL + 1 )
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#define portENABLE_INTERRUPTS() ic->cpl = portKERNEL_INTERRUPT_PRIORITY_LEVEL
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/*---------------------------------------------------------------------------*/
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#define portYIELD_FROM_ISR( xHigherPriorityTaskWoken ) if( xHigherPriorityTaskWoken != pdFALSE ) vTaskSwitchContext()
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/*---------------------------------------------------------------------------*/
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#define portSAVE_CONTEXT() \
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asm __volatile__ \
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( \
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"sub r1, #68 \n" /* Make space on the stack for the context. */ \
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"std r2, [r1] + 0 \n" \
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"stq r4, [r1] + 8 \n" \
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"stq r8, [r1] + 24 \n" \
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"stq r12, [r1] + 40 \n" \
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"mov r6, rtt \n" \
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"mov r7, psr \n" \
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"std r6, [r1] + 56 \n" \
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"movhi r2, #16384 \n" /* Set the pointer to the IC. */ \
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"ldub r3, [r2] + 2 \n" /* Load the current interrupt mask. */ \
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"st r3, [r1]+ 64 \n" /* Store the interrupt mask on the stack. */ \
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"ld r2, [r0]+short(pxCurrentTCB) \n" /* Load the pointer to the TCB. */ \
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"st r1, [r2] \n" /* Save the stack pointer into the TCB. */ \
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"mov r14, r1 \n" /* Compiler expects r14 to be set to the function stack. */ \
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);
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/*---------------------------------------------------------------------------*/
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#define portRESTORE_CONTEXT() \
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asm __volatile__( \
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"ld r2, [r0]+short(pxCurrentTCB) \n" /* Load the TCB to find the stack pointer and context. */ \
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"ld r1, [r2] \n" \
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"movhi r2, #16384 \n" /* Set the pointer to the IC. */ \
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"ld r3, [r1] + 64 \n" /* Load the previous interrupt mask. */ \
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"stb r3, [r2] + 2 \n" /* Set the current interrupt mask to be the previous. */ \
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"ldd r6, [r1] + 56 \n" /* Restore context. */ \
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"mov rtt, r6 \n" \
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"mov psr, r7 \n" \
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"ldd r2, [r1] + 0 \n" \
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"ldq r4, [r1] + 8 \n" \
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"ldq r8, [r1] + 24 \n" \
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"ldq r12, [r1] + 40 \n" \
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"add r1, #68 \n" \
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"rti \n" \
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);
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/*---------------------------------------------------------------------------*/
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/* Task function macros as described on the FreeRTOS.org WEB site. */
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#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
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#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
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/*---------------------------------------------------------------------------*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* PORTMACRO_H */
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