/*
    FreeRTOS V9.0.0rc2 - Copyright (C) 2016 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!
*/

#ifndef PORTMACRO_H
#define PORTMACRO_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. */
#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
#endif
/*-----------------------------------------------------------*/

/* Hardware specifics. */
#define portBYTE_ALIGNMENT  8
#define portSTACK_GROWTH    -1
#define portTICK_PERIOD_MS  ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
/*-----------------------------------------------------------*/

/* Critical section management. */
#define portIPL_SHIFT       ( 10UL )
/* Don't straddle the CEE bit.  Interrupts calling FreeRTOS functions should
never have higher IPL bits set anyway. */
#define portALL_IPL_BITS    ( 0x7FUL << portIPL_SHIFT )
#define portSW0_BIT         ( 0x01 << 8 )

/* Interrupt priority conversion */
#define portIPL_TO_CODE( iplNumber )    ( ( iplNumber >> 1 ) & 0x03ul )
#define portCODE_TO_IPL( iplCode )      ( ( iplCode << 1 ) | 0x01ul )

/*-----------------------------------------------------------*/

static inline uint32_t ulPortGetCP0Status( void )
{
uint32_t rv;

	__asm volatile(
			"\n\t"
			"mfc0 %0,$12,0      \n\t"
			: "=r" ( rv ) :: );

	return rv;
}
/*-----------------------------------------------------------*/

static inline void vPortSetCP0Status( uint32_t new_status)
{
	( void ) new_status;

	__asm__ __volatile__(
			"\n\t"
			"mtc0 %0,$12,0      \n\t"
			"ehb                \n\t"
			:
			:"r" ( new_status ) : );
}
/*-----------------------------------------------------------*/

static inline uint32_t ulPortGetCP0Cause( void )
{
uint32_t rv;

	__asm volatile(
			"\n\t"
			"mfc0 %0,$13,0      \n\t"
			: "=r" ( rv ) :: );

    return rv;
}
/*-----------------------------------------------------------*/

static inline void vPortSetCP0Cause( uint32_t new_cause )
{
	( void ) new_cause;

	__asm__ __volatile__(
			"\n\t"
			"mtc0 %0,$13,0      \n\t"
			"ehb                \n\t"
			:
			:"r" ( new_cause ) : );
}
/*-----------------------------------------------------------*/

/* This clears the IPL bits, then sets them to
configMAX_SYSCALL_INTERRUPT_PRIORITY.  An extra check is performed if
configASSERT() is defined to ensure an assertion handler does not inadvertently
attempt to lower the IPL when the call to assert was triggered because the IPL
value was found to be above configMAX_SYSCALL_INTERRUPT_PRIORITY when an ISR
safe FreeRTOS API function was executed.  ISR safe FreeRTOS API functions are
those that end in FromISR.  FreeRTOS maintains a separate interrupt API to
ensure API function and interrupt entry is as fast and as simple as possible. */
#ifdef configASSERT
    #define portDISABLE_INTERRUPTS() 																			\
	{ 																											\
	uint32_t ulStatus; 																							\
		/* Mask interrupts at and below the kernel interrupt priority. */  										\
		ulStatus = ulPortGetCP0Status(); 																		\
		/* Is the current IPL below configMAX_SYSCALL_INTERRUPT_PRIORITY? */ 									\
		if( ( ( ulStatus & portALL_IPL_BITS ) >> portIPL_SHIFT ) < configMAX_SYSCALL_INTERRUPT_PRIORITY ) 		\
		{ 																										\
			ulStatus &= ~portALL_IPL_BITS;  																	\
			vPortSetCP0Status( ( ulStatus | ( configMAX_SYSCALL_INTERRUPT_PRIORITY << portIPL_SHIFT ) ) ); 		\
		} 																										\
    }
#else /* configASSERT */
	#define portDISABLE_INTERRUPTS() 																			\
	{ 																											\
	uint32_t ulStatus;  																						\
		/* Mask interrupts at and below the kernel interrupt priority. */ 										\
		ulStatus = ulPortGetCP0Status(); 																		\
		ulStatus &= ~portALL_IPL_BITS; 																			\
		vPortSetCP0Status( ( ulStatus | ( configMAX_SYSCALL_INTERRUPT_PRIORITY << portIPL_SHIFT ) ) ); 			\
	}
#endif /* configASSERT */

#define portENABLE_INTERRUPTS() 			\
{ 											\
uint32_t ulStatus; 							\
	/* Unmask all interrupts. */ 			\
	ulStatus = ulPortGetCP0Status(); 		\
	ulStatus &= ~portALL_IPL_BITS; 			\
	vPortSetCP0Status( ulStatus ); 			\
}


extern void vTaskEnterCritical( void );
extern void vTaskExitCritical( void );
#define portCRITICAL_NESTING_IN_TCB	1
#define portENTER_CRITICAL()		vTaskEnterCritical()
#define portEXIT_CRITICAL()			vTaskExitCritical()

extern UBaseType_t uxPortSetInterruptMaskFromISR();
extern void vPortClearInterruptMaskFromISR( UBaseType_t );
#define portSET_INTERRUPT_MASK_FROM_ISR() uxPortSetInterruptMaskFromISR()
#define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedStatusRegister ) vPortClearInterruptMaskFromISR( uxSavedStatusRegister )

#ifndef configUSE_PORT_OPTIMISED_TASK_SELECTION
	#define configUSE_PORT_OPTIMISED_TASK_SELECTION 1
#endif

#if configUSE_PORT_OPTIMISED_TASK_SELECTION == 1

	/* Check the configuration. */
	#if( configMAX_PRIORITIES > 32 )
		#error configUSE_PORT_OPTIMISED_TASK_SELECTION can only be set to 1 when configMAX_PRIORITIES is less than or equal to 32.  It is very rare that a system requires more than 10 to 15 difference priorities as tasks that share a priority will time slice.
	#endif

	/* Store/clear the ready priorities in a bit map. */
	#define portRECORD_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) |= ( 1UL << ( uxPriority ) )
	#define portRESET_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) &= ~( 1UL << ( uxPriority ) )

	/*-----------------------------------------------------------*/

	#define portGET_HIGHEST_PRIORITY( uxTopPriority, uxReadyPriorities ) uxTopPriority = ( 31 - _clz( ( uxReadyPriorities ) ) )

#endif /* taskRECORD_READY_PRIORITY */

/*-----------------------------------------------------------*/

/* Task utilities. */

#define portYIELD() 						\
{ 											\
uint32_t ulCause; 							\
	/* Trigger software interrupt. */ 		\
	ulCause = ulPortGetCP0Cause(); 			\
	ulCause |= portSW0_BIT; 				\
	vPortSetCP0Cause( ulCause ); 			\
}

extern volatile UBaseType_t uxInterruptNesting;
#define portASSERT_IF_IN_ISR() configASSERT( uxInterruptNesting == 0 )

#define portNOP() __asm volatile ( "nop" )

/*-----------------------------------------------------------*/

/* 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 ) 	if( xSwitchRequired )	\
													{ 						\
														portYIELD();		\
													}

/* Required by the kernel aware debugger. */
#ifdef __DEBUG
    #define portREMOVE_STATIC_QUALIFIER
#endif

#ifdef __cplusplus
}
#endif

#endif /* PORTMACRO_H */