/*
 * FreeRTOS Kernel V10.3.1
 * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 *
 * 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.
 *
 * http://www.FreeRTOS.org
 * http://aws.amazon.com/freertos
 *
 * 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. */
    #if __riscv_xlen == 64
        #define portSTACK_TYPE           uint64_t
        #define portBASE_TYPE            int64_t
        #define portUBASE_TYPE           uint64_t
        #define portMAX_DELAY            ( TickType_t ) 0xffffffffffffffffUL
        #define portPOINTER_SIZE_TYPE    uint64_t
    #elif __riscv_xlen == 32
        #define portSTACK_TYPE           uint32_t
        #define portBASE_TYPE            int32_t
        #define portUBASE_TYPE           uint32_t
        #define portMAX_DELAY            ( TickType_t ) 0xffffffffUL
    #else /* if __riscv_xlen == 64 */
        #error Assembler did not define __riscv_xlen
    #endif /* if __riscv_xlen == 64 */


    typedef portSTACK_TYPE   StackType_t;
    typedef portBASE_TYPE    BaseType_t;
    typedef portUBASE_TYPE   UBaseType_t;
    typedef portUBASE_TYPE   TickType_t;

/* Legacy type definitions. */
    #define portCHAR                   char
    #define portFLOAT                  float
    #define portDOUBLE                 double
    #define portLONG                   long
    #define portSHORT                  short

/* 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
/*-----------------------------------------------------------*/

/* Architecture specifics. */
    #define portSTACK_GROWTH          ( -1 )
    #define portTICK_PERIOD_MS        ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
    #ifdef __riscv64
        #error This is the RV32 port that has not yet been adapted for 64.
        #define portBYTE_ALIGNMENT    16
    #else
        #define portBYTE_ALIGNMENT    16
    #endif
/*-----------------------------------------------------------*/


/* Scheduler utilities. */
    extern void vTaskSwitchContext( void );
    #define portYIELD()                                 __asm volatile ( "ecall" );
    #define portEND_SWITCHING_ISR( xSwitchRequired )    if( xSwitchRequired ) vTaskSwitchContext()
    #define portYIELD_FROM_ISR( x )                     portEND_SWITCHING_ISR( x )
/*-----------------------------------------------------------*/


/* Critical section management. */
    #define portCRITICAL_NESTING_IN_TCB    1
    extern void vTaskEnterCritical( void );
    extern void vTaskExitCritical( void );

    #define portSET_INTERRUPT_MASK_FROM_ISR()                          0
    #define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedStatusValue )    ( void ) uxSavedStatusValue
    #define portDISABLE_INTERRUPTS()                                   __asm volatile ( "csrc mstatus, 8" )
    #define portENABLE_INTERRUPTS()                                    __asm volatile ( "csrs mstatus, 8" )
    #define portENTER_CRITICAL()                                       vTaskEnterCritical()
    #define portEXIT_CRITICAL()                                        vTaskExitCritical()

/*-----------------------------------------------------------*/

/* Architecture specific optimisations. */
    #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 = ( 31UL - __builtin_clz( uxReadyPriorities ) )

    #endif /* configUSE_PORT_OPTIMISED_TASK_SELECTION */


/*-----------------------------------------------------------*/

/* 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 )

/*-----------------------------------------------------------*/

    #define portNOP()    __asm volatile ( " nop " )

    #define portINLINE              __inline

    #ifndef portFORCE_INLINE
        #define portFORCE_INLINE    inline __attribute__( ( always_inline ) )
    #endif

    #define portMEMORY_BARRIER()    __asm volatile ( "" ::: "memory" )
/*-----------------------------------------------------------*/


/* configCLINT_BASE_ADDRESS is a legacy definition that was replaced by the
 * configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS definitions.  For
 * backward compatibility derive the newer definitions from the old if the old
 * definition is found. */
    #if defined( configCLINT_BASE_ADDRESS ) && !defined( configMTIME_BASE_ADDRESS ) && ( configCLINT_BASE_ADDRESS == 0 )

/* Legacy case where configCLINT_BASE_ADDRESS was defined as 0 to indicate
 * there was no CLINT.  Equivalent now is to set the MTIME and MTIMECMP
 * addresses to 0. */
        #define configMTIME_BASE_ADDRESS       ( 0 )
        #define configMTIMECMP_BASE_ADDRESS    ( 0 )
    #elif defined( configCLINT_BASE_ADDRESS ) && !defined( configMTIME_BASE_ADDRESS )

/* Legacy case where configCLINT_BASE_ADDRESS was set to the base address of
 * the CLINT.  Equivalent now is to derive the MTIME and MTIMECMP addresses
 * from the CLINT address. */
        #define configMTIME_BASE_ADDRESS       ( ( configCLINT_BASE_ADDRESS ) + 0xBFF8UL )
        #define configMTIMECMP_BASE_ADDRESS    ( ( configCLINT_BASE_ADDRESS ) + 0x4000UL )
    #elif !defined( configMTIME_BASE_ADDRESS ) || !defined( configMTIMECMP_BASE_ADDRESS )
        #error configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS must be defined in FreeRTOSConfig.h.  Set them to zero if there is no MTIME (machine time) clock.  See https: /*www.freertos.org/Using-FreeRTOS-on-RISC-V.html */
    #endif /* if defined( configCLINT_BASE_ADDRESS ) && !defined( configMTIME_BASE_ADDRESS ) && ( configCLINT_BASE_ADDRESS == 0 ) */



    #ifdef __cplusplus
        }
    #endif

#endif /* PORTMACRO_H */