FreeRTOS-Kernel/Source/portable/GCC/ARM_CM3/portmacro.h

/*
	FreeRTOS.org V4.6.1 - Copyright (C) 2003-2007 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.

	***************************************************************************
	See http://www.FreeRTOS.org for documentation, latest information, license 
	and contact details.  Please ensure to read the configuration and relevant 
	port sections of the online documentation.

	Also see http://www.SafeRTOS.com a version that has been certified for use
	in safety critical systems, plus commercial licensing, development and
	support options.
	***************************************************************************
*/

/*
	Change from V4.4.0:

	+ Introduced usage of configKERNEL_INTERRUPT_PRIORITY macro to set the
	  interrupt priority used by the kernel.
*/

#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. */

#define vPortSetInterruptMask()							\
	__asm volatile										\
	(													\
		"	push { r0 }								\n"	\
		"	ldr r0, =ulKernelPriority 				\n"	\
		"	ldr r0, [r0]							\n"	\
		"	msr basepri, r0							\n" \
		"	pop { r0 }								"	\
	)
	
/*-----------------------------------------------------------*/

#define vPortClearInterruptMask()						\
	__asm volatile										\
	(													\
		"	push { r0 }								\n"	\
		"	mov r0, #0								\n"	\
		"	msr basepri, r0							\n"	\
		"	pop	 { r0 }								"	\
	)

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


extern void vPortEnterCritical( void );
extern void vPortExitCritical( void );

#define portDISABLE_INTERRUPTS()	vPortSetInterruptMask();
#define portENABLE_INTERRUPTS()		vPortClearInterruptMask();
#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 inline
#define portNOP()

#ifdef __cplusplus
}
#endif

#endif /* PORTMACRO_H */