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/*
FreeRTOS V8.1.1 - Copyright (C) 2014 Real Time Engineers Ltd.
All rights reserved
VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
***************************************************************************
* *
* FreeRTOS provides completely free yet professionally developed, *
* robust, strictly quality controlled, supported, and cross *
* platform software that has become a de facto standard. *
* *
* Help yourself get started quickly and support the FreeRTOS *
* project by purchasing a FreeRTOS tutorial book, reference *
* manual, or both from: http://www.FreeRTOS.org/Documentation *
* *
* Thank you! *
* *
***************************************************************************
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 modification 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. !<<
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. Full license text is available from the following
link: http://www.freertos.org/a00114.html
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong?" *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, books, training, latest versions,
license and Real Time Engineers Ltd. contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool, a DOS
compatible FAT file system, and our tiny thread aware UDP/IP stack.
http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
licenses offer ticketed support, indemnification and middleware.
http://www.SafeRTOS.com - High Integrity Systems also provide a safety
engineered and independently SIL3 certified version for use in safety and
mission critical applications that require provable dependability.
1 tab == 4 spaces!
*/
#ifndef PORTMACRO_H
#define PORTMACRO_H
/*-----------------------------------------------------------
* 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 uint8_t
#define portBASE_TYPE char
typedef portSTACK_TYPE StackType_t;
typedef signed char BaseType_t;
typedef unsigned char UBaseType_t;
#if( configUSE_16_BIT_TICKS == 1 )
typedef uint16_t TickType_t;
#define portMAX_DELAY ( TickType_t ) 0xffff
#else
typedef uint32_t TickType_t;
#define portMAX_DELAY ( TickType_t ) 0xffffffffUL
#endif
/*-----------------------------------------------------------*/
/* Hardware specifics. */
#define portBYTE_ALIGNMENT 1
#define portSTACK_GROWTH ( -1 )
#define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
#define portYIELD() __asm( "swi" );
#define portNOP() __asm( "nop" );
/*-----------------------------------------------------------*/
/* Critical section handling. */
#define portENABLE_INTERRUPTS() __asm( "cli" )
#define portDISABLE_INTERRUPTS() __asm( "sei" )
/*
* Disable interrupts before incrementing the count of critical section nesting.
* The nesting count is maintained so we know when interrupts should be
* re-enabled. Once interrupts are disabled the nesting count can be accessed
* directly. Each task maintains its own nesting count.
*/
#define portENTER_CRITICAL() \
{ \
extern volatile UBaseType_t uxCriticalNesting; \
\
portDISABLE_INTERRUPTS(); \
uxCriticalNesting++; \
}
/*
* Interrupts are disabled so we can access the nesting count directly. If the
* nesting is found to be 0 (no nesting) then we are leaving the critical
* section and interrupts can be re-enabled.
*/
#define portEXIT_CRITICAL() \
{ \
extern volatile UBaseType_t uxCriticalNesting; \
\
uxCriticalNesting--; \
if( uxCriticalNesting == 0 ) \
{ \
portENABLE_INTERRUPTS(); \
} \
}
/*-----------------------------------------------------------*/
/* Task utilities. */
/*
* These macros are very simple as the processor automatically saves and
* restores its registers as interrupts are entered and exited. In
* addition to the (automatically stacked) registers we also stack the
* critical nesting count. Each task maintains its own critical nesting
* count as it is legitimate for a task to yield from within a critical
* section. If the banked memory model is being used then the PPAGE
* register is also stored as part of the tasks context.
*/
#ifdef BANKED_MODEL
/*
* Load the stack pointer for the task, then pull the critical nesting
* count and PPAGE register from the stack. The remains of the
* context are restored by the RTI instruction.
*/
#define portRESTORE_CONTEXT() \
{ \
extern volatile void * pxCurrentTCB; \
extern volatile UBaseType_t uxCriticalNesting; \
\
__asm( "ldx pxCurrentTCB" ); \
__asm( "lds 0, x" ); \
__asm( "pula" ); \
__asm( "staa uxCriticalNesting" ); \
__asm( "pula" ); \
__asm( "staa 0x30" ); /* 0x30 = PPAGE */ \
}
/*
* By the time this macro is called the processor has already stacked the
* registers. Simply stack the nesting count and PPAGE value, then save
* the task stack pointer.
*/
#define portSAVE_CONTEXT() \
{ \
extern volatile void * pxCurrentTCB; \
extern volatile UBaseType_t uxCriticalNesting; \
\
__asm( "ldaa 0x30" ); /* 0x30 = PPAGE */ \
__asm( "psha" ); \
__asm( "ldaa uxCriticalNesting" ); \
__asm( "psha" ); \
__asm( "ldx pxCurrentTCB" ); \
__asm( "sts 0, x" ); \
}
#else
/*
* These macros are as per the BANKED versions above, but without saving
* and restoring the PPAGE register.
*/
#define portRESTORE_CONTEXT() \
{ \
extern volatile void * pxCurrentTCB; \
extern volatile UBaseType_t uxCriticalNesting; \
\
__asm( "ldx pxCurrentTCB" ); \
__asm( "lds 0, x" ); \
__asm( "pula" ); \
__asm( "staa uxCriticalNesting" ); \
}
#define portSAVE_CONTEXT() \
{ \
extern volatile void * pxCurrentTCB; \
extern volatile UBaseType_t uxCriticalNesting; \
\
__asm( "ldaa uxCriticalNesting" ); \
__asm( "psha" ); \
__asm( "ldx pxCurrentTCB" ); \
__asm( "sts 0, x" ); \
}
#endif
/*
* Utility macro to call macros above in correct order in order to perform a
* task switch from within a standard ISR. This macro can only be used if
* the ISR does not use any local (stack) variables. If the ISR uses stack
* variables portYIELD() should be used in it's place.
*/
#define portTASK_SWITCH_FROM_ISR() \
portSAVE_CONTEXT(); \
vTaskSwitchContext(); \
portRESTORE_CONTEXT();
/* 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 )
#endif /* PORTMACRO_H */
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