/*
 * Copyright (C) 2017 C-SKY Microsystems Co., Ltd. All rights reserved.
 *
 * SPDX-License-Identifier: MIT
 *
 * 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.
 *
 */

#ifndef PORTMACRO_H
#define PORTMACRO_H

#include <stdlib.h>
#include <stdint.h>
#include <csi_core.h>

extern void vPortYield(void);

/* *INDENT-OFF* */
#ifdef __cplusplus
    class vPortYield;
    extern "C" {
#endif
/* *INDENT-ON* */


/*-----------------------------------------------------------
 * 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  uint32_t
#define portBASE_TYPE   long

typedef portSTACK_TYPE StackType_t;
typedef long BaseType_t;
typedef unsigned long UBaseType_t;
typedef void (*portvectorfunc)(void);

#if( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_16_BITS )
    typedef uint16_t  TickType_t;
    #define portMAX_DELAY ( TickType_t ) 0xffff
#elif ( configTICK_TYPE_WIDTH_IN_BITS  == TICK_TYPE_WIDTH_32_BITS )
    typedef uint32_t             TickType_t;
    #define portMAX_DELAY    ( TickType_t ) 0xffffffffUL
#else
    #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
#endif


/* Hardware specifics. */
#define portBYTE_ALIGNMENT          8
#define portSTACK_GROWTH            -1
#define portMS_PERIOD_TICK          10
#define portTICK_PERIOD_MS          ( ( TickType_t ) 1000 / configTICK_RATE_HZ )


static inline void vPortEnableInterrupt( void )
{
    __enable_irq();
}

static inline void vPortDisableInterrupt( void )
{
    __disable_irq();
}

static inline portLONG GetCurrentPSR (void)
{
    return __get_PSR();
}

static inline portLONG SaveLocalPSR (void)
{
    portLONG flags = __get_PSR();
    __disable_irq();
    return flags;
}

static inline void RestoreLocalPSR (portLONG newMask)
{
    __asm__ __volatile__(
    "mtcr   %0, psr \n"
    :
    :"r" (newMask)
    :"memory"
    );
}

extern void vPortEnterCritical( void );
extern void vPortExitCritical( void );
extern __attribute__((naked)) void cpu_yeild(void);

#define portDISABLE_INTERRUPTS()                vPortDisableInterrupt()
#define portENABLE_INTERRUPTS()                 vPortEnableInterrupt()
#define portENTER_CRITICAL()                    vPortEnterCritical()
#define portEXIT_CRITICAL()                     vPortExitCritical()
#define portSET_INTERRUPT_MASK_FROM_ISR()       SaveLocalPSR()
#define portCLEAR_INTERRUPT_MASK_FROM_ISR(a)    RestoreLocalPSR(a)

#define portNOP()                   asm("nop")

extern portLONG ulCriticalNesting;
extern portLONG pendsvflag;

#define portYIELD()                 if (ulCriticalNesting == 0) \
                                    {   \
                                        vPortYield();   \
                                    }   \
                                    else \
                                    {   \
                                        pendsvflag = 1; \
                                    }   \
                                    portNOP();portNOP()

/*-----------------------------------------------------------*/

/* 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 )    do {    \
                                                            if( xSwitchRequired != pdFALSE )    \
                                                            {   \
                                                                portYIELD();    \
                                                            }   \
                                                    }while(0)

#define portYIELD_FROM_ISR( a )     vTaskSwitchContext()


/* *INDENT-OFF* */
#ifdef __cplusplus
    }
#endif
/* *INDENT-ON* */

#endif /* PORTMACRO_H */