/*
 * FreeRTOS Kernel V10.3.1
 * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * http://www.FreeRTOS.org
 * http://aws.amazon.com/freertos
 *
 * 1 tab == 4 spaces!
 */


#ifndef PORTMACRO_H
    #define PORTMACRO_H

    #include <machine.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 - these are a bit legacy and not really used now, other than
 * portSTACK_TYPE and portBASE_TYPE. */
    #define portCHAR          char
    #define portFLOAT         float
    #define portDOUBLE        double
    #define portLONG          long
    #define portSHORT         short
    #define portSTACK_TYPE    uint32_t
    #define portBASE_TYPE     long

    typedef portSTACK_TYPE   StackType_t;
    typedef long             BaseType_t;
    typedef unsigned long    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

/* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
 * not need to be guarded with a critical section. */
        #define portTICK_TYPE_IS_ATOMIC    1
    #endif
/*-----------------------------------------------------------*/

/* Hardware specifics. */
    #define portBYTE_ALIGNMENT               8
    #define portSTACK_GROWTH                 -1
    #define portTICK_PERIOD_MS               ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
    #define portNOP()    nop()
    #define portSTART_SCHEDULER_TRAP_NO      ( 32 )
    #define portYIELD_TRAP_NO                ( 33 )
    #define portKERNEL_INTERRUPT_PRIORITY    ( 1 )

    void vPortYield( void );
    #define portYIELD()                vPortYield()

    extern void vTaskSwitchContext( void );
    #define portYIELD_FROM_ISR( x )    if( x != pdFALSE ) vTaskSwitchContext()

/*
 * This function tells the kernel that the task referenced by xTask is going to
 * use the floating point registers and therefore requires the floating point
 * registers saved as part of its context.
 */
    BaseType_t xPortUsesFloatingPoint( void * xTask );

/*
 * The flop save and restore functions are defined in portasm.src and called by
 * the trace "task switched in" and "trace task switched out" macros.
 */
    void vPortSaveFlopRegisters( void * pulBuffer );
    void vPortRestoreFlopRegisters( void * pulBuffer );

/*
 * pxTaskTag is used to point to the buffer into which the floating point
 * context should be saved.  If pxTaskTag is NULL then the task does not use
 * a floating point context.
 */
    #define traceTASK_SWITCHED_OUT()    if( pxCurrentTCB->pxTaskTag != NULL ) vPortSaveFlopRegisters( pxCurrentTCB->pxTaskTag )
    #define traceTASK_SWITCHED_IN()     if( pxCurrentTCB->pxTaskTag != NULL ) vPortRestoreFlopRegisters( pxCurrentTCB->pxTaskTag )

/*
 * These macros should be called directly, but through the taskENTER_CRITICAL()
 * and taskEXIT_CRITICAL() macros.
 */
    #define portENABLE_INTERRUPTS()     set_imask( 0x00 )
    #define portDISABLE_INTERRUPTS()    set_imask( portKERNEL_INTERRUPT_PRIORITY )

/* Critical nesting counts are stored in the TCB. */
    #define portCRITICAL_NESTING_IN_TCB    ( 1 )

/* The critical nesting functions defined within tasks.c. */
    extern void vTaskEnterCritical( void );
    extern void vTaskExitCritical( void );
    #define portENTER_CRITICAL()    vTaskEnterCritical();
    #define portEXIT_CRITICAL()     vTaskExitCritical();

/*-----------------------------------------------------------*/

/* 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 */