portmacro.h

FreeRTOS在EasyARM2200上的移植代码

/*
	FreeRTOS.org V5.0.0 - Copyright (C) 2003-2008 Richard Barry.

	This file is part of the FreeRTOS.org distribution.

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	it under the terms of the GNU General Public License as published by
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	(at your option) any later version.

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	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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	Please ensure to read the configuration and relevant port sections of the
	online documentation.

	http://www.FreeRTOS.org - Documentation, latest information, license and 
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*/

/*
	Changes from V3.2.3
	
	+ Modified portENTER_SWITCHING_ISR() to allow use with GCC V4.0.1.

	Changes from V3.2.4

	+ Removed the use of the %0 parameter within the assembler macros and 
	  replaced them with hard coded registers.  This will ensure the
	  assembler does not select the link register as the temp register as
	  was occasionally happening previously.

	+ The assembler statements are now included in a single asm block rather
	  than each line having its own asm block.

	Changes from V4.5.0

	+ Removed the portENTER_SWITCHING_ISR() and portEXIT_SWITCHING_ISR() macros
	  and replaced them with portYIELD_FROM_ISR() macro.  Application code 
	  should now make use of the portSAVE_CONTEXT() and portRESTORE_CONTEXT()
	  macros as per the V4.5.1 demo code.
*/

#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	portLONG

#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
#define portNOP()					__asm{ NOP }
/*-----------------------------------------------------------*/	



/* ISR to handle manual context switches (from a call to taskYIELD()). */
//__swi(0x00) void vPortYieldProcessor( void );

#define portYIELD_FROM_ISR()		vTaskSwitchContext()
#define portYIELD()					__asm{ SWI 0}      //进入SWI中断处理
/*-----------------------------------------------------------*/


/* Critical section management. */

/*
 * The interrupt management utilities can only be called from ARM mode.  When
 * THUMB_INTERWORK is defined the utilities are defined as functions in 
 * portISR.c to ensure a switch to ARM mode.  When THUMB_INTERWORK is not 
 * defined then the utilities are defined as macros here - as per other ports.
 */
extern void portDISABLE_INTERRUPTS(void);
extern void portENABLE_INTERRUPTS(void);

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

#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 )

#ifdef __cplusplus
}
#endif

#endif /* PORTMACRO_H */