/*
 * 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

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

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

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

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

/* Task utilities. */

/* Called at the end of an ISR that can cause a context switch. */
#define portEND_SWITCHING_ISR( xSwitchRequired )\
{                                               \
extern uint32_t ulPortYieldRequired;            \
                                                \
    if( xSwitchRequired != pdFALSE )            \
    {                                           \
        ulPortYieldRequired = pdTRUE;           \
    }                                           \
}

#define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
#define portYIELD() __asm volatile ( "SWI 0" ::: "memory" );


/*-----------------------------------------------------------
 * Critical section control
 *----------------------------------------------------------*/

extern void vPortEnterCritical( void );
extern void vPortExitCritical( void );
extern uint32_t ulPortSetInterruptMask( void );
extern void vPortClearInterruptMask( uint32_t ulNewMaskValue );
extern void vPortInstallFreeRTOSVectorTable( void );

/* These macros do not globally disable/enable interrupts.  They do mask off
interrupts that have a priority below configMAX_API_CALL_INTERRUPT_PRIORITY. */
#define portENTER_CRITICAL()        vPortEnterCritical();
#define portEXIT_CRITICAL()         vPortExitCritical();
#define portDISABLE_INTERRUPTS()    ulPortSetInterruptMask()
#define portENABLE_INTERRUPTS()     vPortClearInterruptMask( 0 )
#define portSET_INTERRUPT_MASK_FROM_ISR()       ulPortSetInterruptMask()
#define portCLEAR_INTERRUPT_MASK_FROM_ISR(x)    vPortClearInterruptMask(x)

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

/* Task function macros as described on the FreeRTOS.org WEB site.  These are
not required for this port but included in case common demo code that uses these
macros is used. */
#define portTASK_FUNCTION_PROTO( vFunction, pvParameters )  void vFunction( void *pvParameters )
#define portTASK_FUNCTION( vFunction, pvParameters )    void vFunction( void *pvParameters )

/* Prototype of the FreeRTOS tick handler.  This must be installed as the
handler for whichever peripheral is used to generate the RTOS tick. */
void FreeRTOS_Tick_Handler( void );

/* If configUSE_TASK_FPU_SUPPORT is set to 1 (or left undefined) then tasks are
created without an FPU context and must call vPortTaskUsesFPU() to give
themselves an FPU context before using any FPU instructions.  If
configUSE_TASK_FPU_SUPPORT is set to 2 then all tasks will have an FPU context
by default. */
#if( configUSE_TASK_FPU_SUPPORT != 2 )
    void vPortTaskUsesFPU( void );
#else
    /* Each task has an FPU context already, so define this function away to
    nothing to prevent it being called accidentally. */
    #define vPortTaskUsesFPU()
#endif
#define portTASK_USES_FLOATING_POINT() vPortTaskUsesFPU()

#define portLOWEST_INTERRUPT_PRIORITY ( ( ( uint32_t ) configUNIQUE_INTERRUPT_PRIORITIES ) - 1UL )
#define portLOWEST_USABLE_INTERRUPT_PRIORITY ( portLOWEST_INTERRUPT_PRIORITY - 1UL )

/* Architecture specific optimisations. */
#ifndef configUSE_PORT_OPTIMISED_TASK_SELECTION
    #define configUSE_PORT_OPTIMISED_TASK_SELECTION 1
#endif

#if configUSE_PORT_OPTIMISED_TASK_SELECTION == 1

    /* 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 = ( 31UL - ( uint32_t ) __builtin_clz( uxReadyPriorities ) )

#endif /* configUSE_PORT_OPTIMISED_TASK_SELECTION */

#ifdef configASSERT
    void vPortValidateInterruptPriority( void );
    #define portASSERT_IF_INTERRUPT_PRIORITY_INVALID()  vPortValidateInterruptPriority()
#endif /* configASSERT */

#define portNOP() __asm volatile( "NOP" )
#define portINLINE __inline

#ifdef __cplusplus
    } /* extern C */
#endif


/* The number of bits to shift for an interrupt priority is dependent on the
number of bits implemented by the interrupt controller. */
#if configUNIQUE_INTERRUPT_PRIORITIES == 16
    #define portPRIORITY_SHIFT 4
    #define portMAX_BINARY_POINT_VALUE  3
#elif configUNIQUE_INTERRUPT_PRIORITIES == 32
    #define portPRIORITY_SHIFT 3
    #define portMAX_BINARY_POINT_VALUE  2
#elif configUNIQUE_INTERRUPT_PRIORITIES == 64
    #define portPRIORITY_SHIFT 2
    #define portMAX_BINARY_POINT_VALUE  1
#elif configUNIQUE_INTERRUPT_PRIORITIES == 128
    #define portPRIORITY_SHIFT 1
    #define portMAX_BINARY_POINT_VALUE  0
#elif configUNIQUE_INTERRUPT_PRIORITIES == 256
    #define portPRIORITY_SHIFT 0
    #define portMAX_BINARY_POINT_VALUE  0
#else
    #error Invalid configUNIQUE_INTERRUPT_PRIORITIES setting.  configUNIQUE_INTERRUPT_PRIORITIES must be set to the number of unique priorities implemented by the target hardware
#endif

/* Interrupt controller access addresses. */
#define portICCPMR_PRIORITY_MASK_OFFSET                         ( 0x04 )
#define portICCIAR_INTERRUPT_ACKNOWLEDGE_OFFSET                 ( 0x0C )
#define portICCEOIR_END_OF_INTERRUPT_OFFSET                     ( 0x10 )
#define portICCBPR_BINARY_POINT_OFFSET                          ( 0x08 )
#define portICCRPR_RUNNING_PRIORITY_OFFSET                      ( 0x14 )

#define portINTERRUPT_CONTROLLER_CPU_INTERFACE_ADDRESS      ( configINTERRUPT_CONTROLLER_BASE_ADDRESS + configINTERRUPT_CONTROLLER_CPU_INTERFACE_OFFSET )
#define portICCPMR_PRIORITY_MASK_REGISTER                   ( *( ( volatile uint32_t * ) ( portINTERRUPT_CONTROLLER_CPU_INTERFACE_ADDRESS + portICCPMR_PRIORITY_MASK_OFFSET ) ) )
#define portICCIAR_INTERRUPT_ACKNOWLEDGE_REGISTER_ADDRESS   ( portINTERRUPT_CONTROLLER_CPU_INTERFACE_ADDRESS + portICCIAR_INTERRUPT_ACKNOWLEDGE_OFFSET )
#define portICCEOIR_END_OF_INTERRUPT_REGISTER_ADDRESS       ( portINTERRUPT_CONTROLLER_CPU_INTERFACE_ADDRESS + portICCEOIR_END_OF_INTERRUPT_OFFSET )
#define portICCPMR_PRIORITY_MASK_REGISTER_ADDRESS           ( portINTERRUPT_CONTROLLER_CPU_INTERFACE_ADDRESS + portICCPMR_PRIORITY_MASK_OFFSET )
#define portICCBPR_BINARY_POINT_REGISTER                    ( *( ( const volatile uint32_t * ) ( portINTERRUPT_CONTROLLER_CPU_INTERFACE_ADDRESS + portICCBPR_BINARY_POINT_OFFSET ) ) )
#define portICCRPR_RUNNING_PRIORITY_REGISTER                ( *( ( const volatile uint32_t * ) ( portINTERRUPT_CONTROLLER_CPU_INTERFACE_ADDRESS + portICCRPR_RUNNING_PRIORITY_OFFSET ) ) )

#define portMEMORY_BARRIER() __asm volatile( "" ::: "memory" )

#endif /* PORTMACRO_H */