/*
    FreeRTOS V6.0.0 - Copyright (C) 2009 Real Time Engineers Ltd.

    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.
    Alternative commercial license and support terms are also available upon
    request.  See the licensing section of http://www.FreeRTOS.org for full
    license details.

    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.


    ***************************************************************************
    *                                                                         *
    * The FreeRTOS eBook and reference manual are available to purchase for a *
    * small fee. Help yourself get started quickly while also helping the     *
    * FreeRTOS project! See http://www.FreeRTOS.org/Documentation for details *
    *                                                                         *
    ***************************************************************************

    1 tab == 4 spaces!

    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 int
#define portBASE_TYPE   int


#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
/*-----------------------------------------------------------*/	

/* Interrupt control macros. */
#define portDISABLE_INTERRUPTS() __asm ( "DI" )
#define portENABLE_INTERRUPTS()	 __asm ( "EI" )
/*-----------------------------------------------------------*/

/* Critical section control macros. */
#define portNO_CRITICAL_SECTION_NESTING		( ( unsigned portBASE_TYPE ) 0 )

#define portENTER_CRITICAL()														\
{																					\
extern volatile /*unsigned portSHORT*/ portSTACK_TYPE usCriticalNesting;			\
																					\
	portDISABLE_INTERRUPTS();														\
																					\
	/* Now interrupts are disabled ulCriticalNesting can be accessed */				\
	/* directly.  Increment ulCriticalNesting to keep a count of how many */		\
	/* times portENTER_CRITICAL() has been called. */								\
	usCriticalNesting++;															\
}

#define portEXIT_CRITICAL()															\
{																					\
extern volatile /*unsigned portSHORT*/ portSTACK_TYPE usCriticalNesting;			\
																					\
	if( usCriticalNesting > portNO_CRITICAL_SECTION_NESTING )						\
	{																				\
		/* Decrement the nesting count as we are leaving a critical section. */		\
		usCriticalNesting--;														\
																					\
		/* If the nesting level has reached zero then interrupts should be */		\
		/* re-enabled. */															\
		if( usCriticalNesting == portNO_CRITICAL_SECTION_NESTING )					\
		{																			\
			portENABLE_INTERRUPTS();												\
		}																			\
	}																				\
}
/*-----------------------------------------------------------*/

/* Task utilities. */
extern void vPortYield( void );
extern void vPortStart( void );
extern void portSAVE_CONTEXT( void );
extern void portRESTORE_CONTEXT( void );
#define portYIELD()	__asm ( "trap 0" )
#define portNOP()	__asm ( "NOP" )
extern void vTaskSwitchContext( void );
#define portYIELD_FROM_ISR( xHigherPriorityTaskWoken ) if( xHigherPriorityTaskWoken ) vTaskSwitchContext()

/*-----------------------------------------------------------*/

/* Hardwware specifics. */
#define portBYTE_ALIGNMENT	4
#define portSTACK_GROWTH	( -1 )
#define portTICK_RATE_MS	( ( portTickType ) 1000 / configTICK_RATE_HZ )		
/*-----------------------------------------------------------*/

/* 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 */