/*
	FreeRTOS.org V5.3.0 - Copyright (C) 2003-2009 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 (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.org without being obliged to provide
	the source code for any proprietary components.  Alternative commercial
	license and support terms are also available upon request.  See the 
	licensing section of http://www.FreeRTOS.org for full details.

	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.


	***************************************************************************
	*                                                                         *
	* Get the FreeRTOS eBook!  See http://www.FreeRTOS.org/Documentation      *
	*                                                                         *
	* This is a concise, step by step, 'hands on' guide that describes both   *
	* general multitasking concepts and FreeRTOS specifics. It presents and   *
	* explains numerous examples that are written using the FreeRTOS API.     *
	* Full source code for all the examples is provided in an accompanying    *
	* .zip file.                                                              *
	*                                                                         *
	***************************************************************************

	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 portLONG
#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
/*-----------------------------------------------------------*/	

/* Architecture specifics. */
#define portSTACK_GROWTH			( -1 )
#define portTICK_RATE_MS			( ( portTickType ) 1000 / configTICK_RATE_HZ )		
#define portBYTE_ALIGNMENT			4
/*-----------------------------------------------------------*/	


/* Scheduler utilities. */
extern void vPortYieldFromISR( void );

#define portYIELD()					vPortYieldFromISR()

#define portEND_SWITCHING_ISR( xSwitchRequired ) if( xSwitchRequired ) vPortYieldFromISR()
/*-----------------------------------------------------------*/


/* Critical section management. */

/* 
 * Set basepri to portMAX_SYSCALL_INTERRUPT_PRIORITY without effecting other
 * registers.  r0 is clobbered.
 */ 
#define portSET_INTERRUPT_MASK()						\
	__asm volatile										\
	(													\
		"	mov r0, %0								\n"	\
		"	msr basepri, r0							\n" \
		::"i"(configMAX_SYSCALL_INTERRUPT_PRIORITY):"r0"	\
	)
	
/*
 * Set basepri back to 0 without effective other registers.
 * r0 is clobbered.
 */
#define portCLEAR_INTERRUPT_MASK()			\
	__asm volatile							\
	(										\
		"	mov r0, #0					\n"	\
		"	msr basepri, r0				\n"	\
		:::"r0"								\
	)

#define portSET_INTERRUPT_MASK_FROM_ISR()		0;portSET_INTERRUPT_MASK()
#define portCLEAR_INTERRUPT_MASK_FROM_ISR(x)	portCLEAR_INTERRUPT_MASK();(void)x


extern void vPortEnterCritical( void );
extern void vPortExitCritical( void );

#define portDISABLE_INTERRUPTS()	portSET_INTERRUPT_MASK()
#define portENABLE_INTERRUPTS()		portCLEAR_INTERRUPT_MASK()
#define portENTER_CRITICAL()		vPortEnterCritical()
#define portEXIT_CRITICAL()			vPortExitCritical()
/*-----------------------------------------------------------*/

/* 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 )

#define portNOP()

#ifdef __cplusplus
}
#endif

#endif /* PORTMACRO_H */