/*
 * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  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.
 *
 * https://www.FreeRTOS.org
 * https://github.com/FreeRTOS
 *
 */

#ifndef PORTMACRO_H
#define PORTMACRO_H

#ifdef __cplusplus
extern "C" {
#endif

/* System Includes. */
#include <tc1782.h>
#include <machine/intrinsics.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( 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

    /* 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
#else
    #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
#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( " nop " )
#define portCRITICAL_NESTING_IN_TCB                 1
#define portRESTORE_FIRST_TASK_PRIORITY_LEVEL       1


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

typedef struct MPU_SETTINGS { uint32_t ulNotUsed; } xMPU_SETTINGS;

/* Define away the instruction from the Restore Context Macro. */
#define portPRIVILEGE_BIT                           0x0UL

#define portCCPN_MASK                       ( 0x000000FFUL )

extern void vTaskEnterCritical( void );
extern void vTaskExitCritical( void );
#define portENTER_CRITICAL()            vTaskEnterCritical()
#define portEXIT_CRITICAL()             vTaskExitCritical()
/*---------------------------------------------------------------------------*/

/* CSA Manipulation. */
#define portCSA_TO_ADDRESS( pCSA )          ( ( uint32_t * )( ( ( ( pCSA ) & 0x000F0000 ) << 12 ) | ( ( ( pCSA ) & 0x0000FFFF ) << 6 ) ) )
#define portADDRESS_TO_CSA( pAddress )      ( ( uint32_t )( ( ( ( (uint32_t)( pAddress ) ) & 0xF0000000 ) >> 12 ) | ( ( ( uint32_t )( pAddress ) & 0x003FFFC0 ) >> 6 ) ) )
/*---------------------------------------------------------------------------*/

#define portYIELD()                             _syscall( 0 )
/* Port Restore is implicit in the platform when the function is returned from the original PSW is automatically replaced. */
#define portSYSCALL_TASK_YIELD                  0
#define portSYSCALL_RAISE_PRIORITY              1
/*---------------------------------------------------------------------------*/

/* Critical section management. */

/* Set ICR.CCPN to configMAX_SYSCALL_INTERRUPT_PRIORITY. */
#define portDISABLE_INTERRUPTS()    {                                                                                                   \
                                        uint32_t ulICR;                                                                         \
                                        _disable();                                                                                     \
                                        ulICR = __MFCR( $ICR );         /* Get current ICR value. */                                        \
                                        ulICR &= ~portCCPN_MASK;    /* Clear down mask bits. */                                         \
                                        ulICR |= configMAX_SYSCALL_INTERRUPT_PRIORITY; /* Set mask bits to required priority mask. */   \
                                        _mtcr( $ICR, ulICR );       /* Write back updated ICR. */                                       \
                                        _isync();                                                                                       \
                                        _enable();                                                                                      \
                                    }

/* Clear ICR.CCPN to allow all interrupt priorities. */
#define portENABLE_INTERRUPTS()     {                                                                   \
                                        uint32_t ulICR;                                         \
                                        _disable();                                                     \
                                        ulICR = __MFCR( $ICR );     /* Get current ICR value. */        \
                                        ulICR &= ~portCCPN_MASK;    /* Clear down mask bits. */         \
                                        _mtcr( $ICR, ulICR );       /* Write back updated ICR. */       \
                                        _isync();                                                       \
                                        _enable();                                                      \
                                    }

/* Set ICR.CCPN to uxSavedMaskValue. */
#define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedMaskValue )   {                                                                                       \
                                                                    uint32_t ulICR;                                                             \
                                                                    _disable();                                                                         \
                                                                    ulICR = __MFCR( $ICR );     /* Get current ICR value. */                            \
                                                                    ulICR &= ~portCCPN_MASK;    /* Clear down mask bits. */                             \
                                                                    ulICR |= uxSavedMaskValue;  /* Set mask bits to previously saved mask value. */     \
                                                                    _mtcr( $ICR, ulICR );       /* Write back updated ICR. */                           \
                                                                    _isync();                                                                           \
                                                                    _enable();                                                                          \
                                                                }


/* Set ICR.CCPN to configMAX_SYSCALL_INTERRUPT_PRIORITY */
extern uint32_t uxPortSetInterruptMaskFromISR( void );
#define portSET_INTERRUPT_MASK_FROM_ISR()   uxPortSetInterruptMaskFromISR()

/* Pend a priority 1 interrupt, which will take care of the context switch. */
#define portYIELD_FROM_ISR( xHigherPriorityTaskWoken )      do { if( xHigherPriorityTaskWoken != pdFALSE ) { CPU_SRC0.bits.SETR = 1; _isync(); } } while( 0 )

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

/* 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 )
/*---------------------------------------------------------------------------*/

/*
 * Port specific clean up macro required to free the CSAs that were consumed by
 * a task that has since been deleted.
 */
void vPortReclaimCSA( uint32_t *pxTCB );
#define portCLEAN_UP_TCB( pxTCB )       vPortReclaimCSA( ( uint32_t * ) ( pxTCB ) )

#ifdef __cplusplus
}
#endif

#endif /* PORTMACRO_H */