/*
    FreeRTOS V9.0.0 - 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

#include <machine/cpu.h>

/*-----------------------------------------------------------
 * 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
/*-----------------------------------------------------------*/

/* Architecture specifics. */
#define portSTACK_GROWTH							( -1 )
#define portTICK_PERIOD_MS							( ( TickType_t ) 1000 / configTICK_RATE_HZ )
#define portBYTE_ALIGNMENT							4
#define portNOP()									__asm__ volatile ( "mov r0, r0" )
#define portCRITICAL_NESTING_IN_TCB					1
#define portIRQ_TRAP_YIELD							31
/*-----------------------------------------------------------*/

/* Task utilities. */

extern void vPortYield( void );

/*---------------------------------------------------------------------------*/

#define portYIELD()		asm __volatile__( " trap #%0 "::"i"(portIRQ_TRAP_YIELD):"memory")
/*---------------------------------------------------------------------------*/

extern void vTaskEnterCritical( void );
extern void vTaskExitCritical( void );
#define portENTER_CRITICAL()		vTaskEnterCritical()
#define portEXIT_CRITICAL()			vTaskExitCritical()
/*---------------------------------------------------------------------------*/

/* Critical section management. */
#define portDISABLE_INTERRUPTS() 	cpu_int_disable()
#define portENABLE_INTERRUPTS() 	cpu_int_enable()

/*---------------------------------------------------------------------------*/

#define portYIELD_FROM_ISR( xHigherPriorityTaskWoken ) if( xHigherPriorityTaskWoken != pdFALSE ) vTaskSwitchContext()

/*---------------------------------------------------------------------------*/

#define portSAVE_CONTEXT()				\
	asm __volatile__																								\
	(																												\
		"sub	r1, #68					\n" /* Make space on the stack for the context. */							\
		"std	r2, [r1] + 	0			\n"																			\
		"stq	r4, [r1] +	8			\n"																			\
		"stq	r8, [r1] +	24			\n"																			\
		"stq	r12, [r1] +	40			\n"																			\
		"mov	r6, rtt					\n"																			\
		"mov	r7, psr					\n"																			\
		"std	r6, [r1] +	56			\n"																			\
		"movhi	r2, #16384				\n"	/* Set the pointer to the IC. */										\
		"ldub	r3, [r2] + 2			\n"	/* Load the current interrupt mask. */									\
		"st		r3, [r1]+ 64			\n"	/* Store the interrupt mask on the stack. */ 							\
		"ld		r2, [r0]+short(pxCurrentTCB)	\n"	/* Load the pointer to the TCB. */								\
		"st		r1, [r2]				\n"	/* Save the stack pointer into the TCB. */								\
		"mov	r14, r1					\n"	/* Compiler expects r14 to be set to the function stack. */				\
	);
/*---------------------------------------------------------------------------*/

#define portRESTORE_CONTEXT()																						\
	asm __volatile__(																								\
		"ld		r2, [r0]+short(pxCurrentTCB)	\n"	/* Load the TCB to find the stack pointer and context. */		\
		"ld		r1, [r2]				\n"																			\
		"movhi	r2, #16384				\n"	/* Set the pointer to the IC. */										\
		"ld		r3, [r1] + 64			\n"	/* Load the previous interrupt mask. */									\
		"stb	r3, [r2] + 2  			\n"	/* Set the current interrupt mask to be the previous. */				\
		"ldd	r6, [r1] + 56			\n"	/* Restore context. */													\
		"mov	rtt, r6					\n"																			\
		"mov	psr, r7					\n"																			\
		"ldd	r2, [r1] + 0			\n"																			\
		"ldq	r4, [r1] +	8			\n"																			\
		"ldq	r8, [r1] +	24			\n"																			\
		"ldq	r12, [r1] +	40			\n"																			\
		"add	r1, #68					\n"																			\
		"rti							\n"																			\
	 );

/*---------------------------------------------------------------------------*/

/* 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 */