portable.h

Go to the documentation of this file.

/*
    FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
    All rights reserved

    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.

    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 on the following
    link: http://www.freertos.org/a00114.html

    ***************************************************************************
     *                                                                       *
     *    FreeRTOS provides completely free yet professionally developed,    *
     *    robust, strictly quality controlled, supported, and cross          *
     *    platform software that is more than just the market leader, it     *
     *    is the industry's de facto standard.                               *
     *                                                                       *
     *    Help yourself get started quickly while simultaneously helping     *
     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
     *    tutorial book, reference manual, or both:                          *
     *    http://www.FreeRTOS.org/Documentation                              *
     *                                                                       *
    ***************************************************************************

    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
    the FAQ page "My application does not run, what could be wrong?".  Have you
    defined configASSERT()?

    http://www.FreeRTOS.org/support - In return for receiving this top quality
    embedded software for free we request you assist our global community by
    participating in the support forum.

    http://www.FreeRTOS.org/training - Investing in training allows your team to
    be as productive as possible as early as possible.  Now you can receive
    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
    Ltd, and the world's leading authority on the world's leading RTOS.

    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.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.

    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
    licenses offer ticketed support, indemnification and commercial 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!
*/

/*-----------------------------------------------------------
 * Portable layer API.  Each function must be defined for each port.
 *----------------------------------------------------------*/

#ifndef PORTABLE_H
#define PORTABLE_H

/* Each FreeRTOS port has a unique portmacro.h header file.  Originally a
pre-processor definition was used to ensure the pre-processor found the correct
portmacro.h file for the port being used.  That scheme was deprecated in favour
of setting the compiler's include path such that it found the correct
portmacro.h file - removing the need for the constant and allowing the
portmacro.h file to be located anywhere in relation to the port being used.
Purely for reasons of backward compatibility the old method is still valid, but
to make it clear that new projects should not use it, support for the port
specific constants has been moved into the deprecated_definitions.h header
file. */
#include "deprecated_definitions.h"

/* If portENTER_CRITICAL is not defined then including deprecated_definitions.h
did not result in a portmacro.h header file being included - and it should be
included here.  In this case the path to the correct portmacro.h header file
must be set in the compiler's include path. */
#ifndef portENTER_CRITICAL
    #include "portmacro.h"
#endif

#if portBYTE_ALIGNMENT == 32
    #define portBYTE_ALIGNMENT_MASK ( 0x001f )
#endif

#if portBYTE_ALIGNMENT == 16
    #define portBYTE_ALIGNMENT_MASK ( 0x000f )
#endif

#if portBYTE_ALIGNMENT == 8
    #define portBYTE_ALIGNMENT_MASK ( 0x0007 )
#endif

#if portBYTE_ALIGNMENT == 4
    #define portBYTE_ALIGNMENT_MASK ( 0x0003 )
#endif

#if portBYTE_ALIGNMENT == 2
    #define portBYTE_ALIGNMENT_MASK ( 0x0001 )
#endif

#if portBYTE_ALIGNMENT == 1
    #define portBYTE_ALIGNMENT_MASK ( 0x0000 )
#endif

#ifndef portBYTE_ALIGNMENT_MASK
    #error "Invalid portBYTE_ALIGNMENT definition"
#endif

#ifndef portNUM_CONFIGURABLE_REGIONS
    #define portNUM_CONFIGURABLE_REGIONS 1
#endif

#ifdef __cplusplus
extern "C" {
#endif

#include "mpu_wrappers.h"

/*
 * Setup the stack of a new task so it is ready to be placed under the
 * scheduler control.  The registers have to be placed on the stack in
 * the order that the port expects to find them.
 *
 */
#if( portUSING_MPU_WRAPPERS == 1 )
    StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters, BaseType_t xRunPrivileged ) PRIVILEGED_FUNCTION;
#else
    StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters ) PRIVILEGED_FUNCTION;
#endif

/* Used by heap_5.c. */
typedef struct HeapRegion
{
    uint8_t *pucStartAddress;
    size_t xSizeInBytes;
} HeapRegion_t;

/*
 * Used to define multiple heap regions for use by heap_5.c.  This function
 * must be called before any calls to pvPortMalloc() - not creating a task,
 * queue, semaphore, mutex, software timer, event group, etc. will result in
 * pvPortMalloc being called.
 *
 * pxHeapRegions passes in an array of HeapRegion_t structures - each of which
 * defines a region of memory that can be used as the heap.  The array is
 * terminated by a HeapRegions_t structure that has a size of 0.  The region
 * with the lowest start address must appear first in the array.
 */
void vPortDefineHeapRegions( const HeapRegion_t * const pxHeapRegions ) PRIVILEGED_FUNCTION;


/*
 * Map to the memory management routines required for the port.
 */
void *pvPortMalloc( size_t xSize ) PRIVILEGED_FUNCTION;
void vPortFree( void *pv ) PRIVILEGED_FUNCTION;
void vPortInitialiseBlocks( void ) PRIVILEGED_FUNCTION;
size_t xPortGetFreeHeapSize( void ) PRIVILEGED_FUNCTION;
size_t xPortGetMinimumEverFreeHeapSize( void ) PRIVILEGED_FUNCTION;

/*
 * Setup the hardware ready for the scheduler to take control.  This generally
 * sets up a tick interrupt and sets timers for the correct tick frequency.
 */
BaseType_t xPortStartScheduler( void ) PRIVILEGED_FUNCTION;

/*
 * Undo any hardware/ISR setup that was performed by xPortStartScheduler() so
 * the hardware is left in its original condition after the scheduler stops
 * executing.
 */
void vPortEndScheduler( void ) PRIVILEGED_FUNCTION;

/*
 * The structures and methods of manipulating the MPU are contained within the
 * port layer.
 *
 * Fills the xMPUSettings structure with the memory region information
 * contained in xRegions.
 */
#if( portUSING_MPU_WRAPPERS == 1 )
    struct xMEMORY_REGION;
    void vPortStoreTaskMPUSettings( xMPU_SETTINGS *xMPUSettings, const struct xMEMORY_REGION * const xRegions, StackType_t *pxBottomOfStack, uint16_t usStackDepth ) PRIVILEGED_FUNCTION;
#endif

#ifdef __cplusplus
}
#endif

#endif /* PORTABLE_H */