FreeRTOSV7.2.0/FreeRTOS/Source/portable/MPLAB/PIC32MX/portmacro.h

/*
    FreeRTOS V7.2.0 - Copyright (C) 2012 Real Time Engineers Ltd.
	

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    This file is part of the FreeRTOS distribution.

    FreeRTOS is free software; you can redistribute it and/or modify it under
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    Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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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 long portTickType;
	#define portMAX_DELAY ( portTickType ) 0xffffffff
#endif
/*-----------------------------------------------------------*/

/* Hardware specifics. */
#define portBYTE_ALIGNMENT			8
#define portSTACK_GROWTH			-1
#define portTICK_RATE_MS			( ( portTickType ) 1000 / configTICK_RATE_HZ )		
/*-----------------------------------------------------------*/

/* Critical section management. */
#define portIPL_SHIFT				( 10UL )
#define portALL_IPL_BITS			( 0x3fUL << portIPL_SHIFT )
#define portSW0_BIT					( 0x01 << 8 )

/* This clears the IPL bits, then sets them to 
configMAX_SYSCALL_INTERRUPT_PRIORITY.  This function should not be called
from an interrupt, so therefore will not be called with an IPL setting
above configMAX_SYSCALL_INTERRUPT_PRIORITY.  Therefore, when used correctly, the 
instructions in this macro can only result in the IPL being raised, and 
therefore never lowered. */
#define portDISABLE_INTERRUPTS()										\
{																		\
unsigned long ulStatus;													\
																		\
	/* Mask interrupts at and below the kernel interrupt priority. */	\
	ulStatus = _CP0_GET_STATUS();										\
	ulStatus &= ~portALL_IPL_BITS;										\
	_CP0_SET_STATUS( ( ulStatus | ( configMAX_SYSCALL_INTERRUPT_PRIORITY << portIPL_SHIFT ) ) ); \
}

#define portENABLE_INTERRUPTS()											\
{																		\
unsigned long 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 long ulStatus;							\
												\
	/* Trigger software interrupt. */			\
	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 */