portmacro.h

FreeRTOS - V5.1.1 Last Update: Nov 20 2008 http://sourceforge.net/projects/freertos/

/*
	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.

    ***************************************************************************
    ***************************************************************************
    *                                                                         *
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    * and even write all or part of your application on your behalf.          *
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    ***************************************************************************
    ***************************************************************************

	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.

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*/

#ifndef PORTMACRO_H
#define PORTMACRO_H

/* System include files */
#include <plib.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 )		
/*-----------------------------------------------------------*/

/* Critical section management. */
#define portIPL_SHIFT				( 10 )
#define portALL_IPL_BITS			( 0x3f << portIPL_SHIFT )
#define portSW0_BIT					( 0x01 << 8 )

#define portDISABLE_INTERRUPTS()											\
{																			\
unsigned portLONG ulStatus;													\
																			\
	/* Mask interrupts at and below the kernel interrupt priority. */		\
	ulStatus = _CP0_GET_STATUS();											\
	ulStatus |= ( configMAX_SYSCALL_INTERRUPT_PRIORITY << portIPL_SHIFT );	\
	_CP0_SET_STATUS( ulStatus );											\
}

#define portENABLE_INTERRUPTS()												\
{																			\
unsigned portLONG ulStatus;													\
																			\
	/* Unmask all interrupts. */											\
	ulStatus = _CP0_GET_STATUS();											\
	ulStatus &= ~portALL_IPL_BITS;											\
	_CP0_SET_STATUS( ulStatus );											\
}


extern void vTaskEnterCritical( void );
extern void vTaskExitCritical( void );
#define portCRITICAL_NESTING_IN_TCB	1
#define portENTER_CRITICAL()		vTaskEnterCritical()
#define portEXIT_CRITICAL()			vTaskExitCritical()

extern unsigned portBASE_TYPE uxPortSetInterruptMaskFromISR();
extern void vPortClearInterruptMaskFromISR( unsigned portBASE_TYPE );
#define portSET_INTERRUPT_MASK_FROM_ISR() uxPortSetInterruptMaskFromISR()
#define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedStatusRegister ) vPortClearInterruptMaskFromISR( uxSavedStatusRegister )

/*-----------------------------------------------------------*/

/* Task utilities. */

#define portYIELD()								\
{												\
unsigned portLONG ulStatus;						\
												\
	/* Unmask all interrupts. */				\
	ulStatus = _CP0_GET_CAUSE();				\
	ulStatus |= portSW0_BIT;					\
	_CP0_SET_CAUSE( ulStatus );					\
}


#define portNOP()	asm volatile ( 	"nop" )

/*-----------------------------------------------------------*/

/* 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 )	\
													{						\
														portYIELD();		\
													}

/* Required by the kernel aware debugger. */
#ifdef __DEBUG
	#define portREMOVE_STATIC_QUALIFIER
#endif

#ifdef __cplusplus
}
#endif

#endif /* PORTMACRO_H */