/*
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    ***************************************************************************
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    >>!   outside of the FreeRTOS kernel.                                   !<<
    ***************************************************************************

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    ***************************************************************************
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*/


#ifndef PORTMACRO_CMSIS_H
#define PORTMACRO_CMSIS_H

#include "app_util.h"
#include "nordic_common.h"
#ifdef SOFTDEVICE_PRESENT
#include "nrf_soc.h"
#include "softdevice_handler.h"
#include "app_error.h"
#include "app_util_platform.h"
#endif

#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	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
/*-----------------------------------------------------------*/

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

/* RTC register */
#define portNRF_RTC_REG        NRF_RTC1
/* IRQn used by the selected RTC */
#define portNRF_RTC_IRQn       RTC1_IRQn
/* Constants required to manipulate the NVIC. */
#define portNRF_RTC_PRESCALER  ( (uint32_t) (ROUNDED_DIV(configSYSTICK_CLOCK_HZ, configTICK_RATE_HZ) - 1) )
/* Maximum RTC ticks */
#define portNRF_RTC_MAXTICKS   ((1U<<24)-1U)
/*-----------------------------------------------------------*/

/* Internal auxiliary macro */
#define portPendSVSchedule() do                                                 \
{                                                                               \
    /* Set a PendSV to request a context switch. */                             \
    SCB->ICSR = SCB_ICSR_PENDSVSET_Msk;                                         \
    __SEV();                                                                    \
    /* Barriers are normally not required but do ensure the code is completely  \
    within the specified behaviour for the architecture. */                     \
    __DSB();                                                                    \
    __ISB();                                                                    \
}while(0)

/* Scheduler utilities. */
#define portYIELD() vPortTaskYield()

#define portEND_SWITCHING_ISR( xSwitchRequired ) if( (xSwitchRequired) != pdFALSE ) { portPendSVSchedule(); }
#define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
/*-----------------------------------------------------------*/

/* Critical section management. */
extern void vPortEnterCritical( void );
extern void vPortExitCritical( void );
extern void vPortTaskYield( void );
#define portSET_INTERRUPT_MASK_FROM_ISR()		ulPortDisableISR()
#define portCLEAR_INTERRUPT_MASK_FROM_ISR(x)	vPortRestoreISR(x)
#define portDISABLE_INTERRUPTS()				vPortDisableISR()
#define portENABLE_INTERRUPTS()					vPortEnableISR()
#define portENTER_CRITICAL()					vPortEnterCritical()
#define portEXIT_CRITICAL()						vPortExitCritical()

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

/* Task function macros as described on the FreeRTOS.org WEB site.  These are
not necessary for to use this port.  They are defined so the common demo files
(which build with all the ports) will build. */
#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
/*-----------------------------------------------------------*/

/* Tickless idle/low power functionality. */
#ifndef portSUPPRESS_TICKS_AND_SLEEP
	extern void vPortSuppressTicksAndSleep( TickType_t xExpectedIdleTime );
	#define portSUPPRESS_TICKS_AND_SLEEP( xExpectedIdleTime ) vPortSuppressTicksAndSleep( xExpectedIdleTime )
#endif

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

__STATIC_INLINE void vPortDisableISR(void)
{
#ifdef SOFTDEVICE_PRESENT
    uint32_t primask = __get_PRIMASK();
    /* SVC cannot be called if interrupts are blocked globally */
    if(!primask)
    {
        if(softdevice_handler_isEnabled())
        {
            if (current_int_priority_get() > APP_IRQ_PRIORITY_HIGH)
            {
                uint8_t dummy = 0;
                uint32_t err_code = sd_nvic_critical_region_enter(&dummy);
                APP_ERROR_CHECK(err_code);
            }
        }
        else
        {
#endif
        __disable_irq();
#ifdef SOFTDEVICE_PRESENT
        }
    }
#endif
}

__STATIC_INLINE void vPortEnableISR(void)
{
    __enable_irq();
#ifdef SOFTDEVICE_PRESENT
    if(softdevice_handler_isEnabled())
    {
        if (current_int_priority_get() > APP_IRQ_PRIORITY_HIGH)
        {
            UNUSED_VARIABLE(sd_nvic_critical_region_exit(0));
        }
    }
#endif
}

/* Union used to remember current ISR state.
 * It concentrates information about ISR state and internal SD state into 32 bit variable. */
typedef union
{
    uint32_t u32; //< 32 bit access to the variable
    struct
    {
        uint8_t sd_nested;        //< Soft device nested element
        uint8_t primask;          //< Saved primask state
        uint8_t sd_nested_used:1; //< Information that sd_nested needs to be restored
        uint8_t primask_used:1;   //< Information that primask needs to be restored
    }s;
}portISRState_t;

/* Make sure that all elements in isr state fits in uint32_t element*/
STATIC_ASSERT(sizeof(portISRState_t) == sizeof(uint32_t));

__STATIC_INLINE uint32_t ulPortDisableISR(void)
{
    portISRState_t isrs = {0};
    uint32_t primask = __get_PRIMASK();
    /* SVC cannot be called if interrupts are blocked globally */
    if(!primask)
    {
#ifdef SOFTDEVICE_PRESENT
        if(softdevice_handler_isEnabled())
        {
            if (current_int_priority_get() > APP_IRQ_PRIORITY_HIGH)
            {
                uint32_t err_code = sd_nvic_critical_region_enter(&isrs.s.sd_nested);
                APP_ERROR_CHECK(err_code);
                isrs.s.sd_nested_used = 1;
            }
        }
        else
        {
#endif
            __disable_irq();
            isrs.s.primask = primask;
isrs.s.primask_used = 1;
#ifdef SOFTDEVICE_PRESENT
        }
#endif
    }
    return isrs.u32;
}

__STATIC_INLINE void vPortRestoreISR(uint32_t state)
{
    portISRState_t isrs = {state};
    if(isrs.s.primask_used)
    {
        __set_PRIMASK(isrs.s.primask);
    }
#ifdef SOFTDEVICE_PRESENT
    if(isrs.s.sd_nested_used)
    {
        UNUSED_VARIABLE(sd_nvic_critical_region_exit(isrs.s.sd_nested));
    }
#endif
}

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


#ifdef __cplusplus
}
#endif

#endif /* PORTMACRO_CMSIS_H */

