/*
 * SPDX-FileCopyrightText: 2020 Amazon.com, Inc. or its affiliates
 *
 * SPDX-License-Identifier: MIT
 *
 * SPDX-FileContributor: 2023 Espressif Systems (Shanghai) CO LTD
 */

/*
 * FreeRTOS Kernel V10.4.3
 * 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.
 *
 * https://www.FreeRTOS.org
 * https://github.com/FreeRTOS
 *
 */

#include "sdkconfig.h"

/* This file implements the heap related functions that are called by FreeRTOS.
 * ESP-IDF provides its own heap containing memory with different capabilities
 * (see esp_heap_caps.h). Thus, this file maps a subset of the ESP-IDF heap to
 * act as the FreeRTOS heap.
 *
 * All dynamic allocation done by FreeRTOS should be placed in internal 8-bit
 * accessible RAM (i.e., using the MALLOC_CAP_INTERNAL|MALLOC_CAP_8BIT flags).
 * This is due to the fact that FreeRTOS objects (e.g., task stacks, TCBs,
 * queues etc) must be accessible even if the cache is disabled. Therefore, the
 * heap that is made available to FreeRTOS for dynamic allocation is a subset of
 * the ESP-IDF heap (where all MALLOC_CAP_INTERNAL|MALLOC_CAP_8BIT memory is
 * made available to FreeRTOS for dynamic allocation).
 */

/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
 * all the API functions to use the MPU wrappers.  That should only be done when
 * task.h is included from an application file. */
#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE

#include "FreeRTOS.h"

#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE

#if ( configSUPPORT_DYNAMIC_ALLOCATION == 0 )
    #error This file must not be used if configSUPPORT_DYNAMIC_ALLOCATION is 0
#endif

#include "esp_heap_caps.h"

#if !CONFIG_IDF_TARGET_LINUX
    /* Memory util functions are not implemented in the Linux simulator */
    #include "esp_memory_utils.h"
#endif /* CONFIG_IDF_TARGET_LINUX */

#define portFREERTOS_HEAP_CAPS    ( MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT )

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

void * pvPortMalloc( size_t xWantedSize )
{
    void * pvReturn = NULL;

    /* All dynamic allocation done by FreeRTOS goes through this function. If
     * users need to allocate FreeRTOS objects into external RAM, they should
     * use the "static" equivalents of FreeRTOS API to create FreeRTOS objects
     * (e.g., queues). */
    pvReturn = heap_caps_malloc( xWantedSize, portFREERTOS_HEAP_CAPS );

    return pvReturn;
}
/*-----------------------------------------------------------*/

void vPortFree( void * pv )
{
    heap_caps_free( pv );
}
/*-----------------------------------------------------------*/

size_t xPortGetFreeHeapSize( void )
{
    return heap_caps_get_free_size( portFREERTOS_HEAP_CAPS );
}
/*-----------------------------------------------------------*/

size_t xPortGetMinimumEverFreeHeapSize( void )
{
    return heap_caps_get_minimum_free_size( portFREERTOS_HEAP_CAPS );
}
/*-----------------------------------------------------------*/

bool xPortCheckValidTCBMem(const void *ptr)
{
    #if CONFIG_IDF_TARGET_LINUX
        return true;
    #else /* CONFIG_IDF_TARGET_LINUX */
        return esp_ptr_internal(ptr) && esp_ptr_byte_accessible(ptr);
    #endif /* CONFIG_IDF_TARGET_LINUX */
}

bool xPortcheckValidStackMem(const void *ptr)
{
    #if CONFIG_IDF_TARGET_LINUX
        return true;
    #else /* CONFIG_IDF_TARGET_LINUX */
        #ifdef CONFIG_SPIRAM_ALLOW_STACK_EXTERNAL_MEMORY
            return esp_ptr_byte_accessible(ptr);
        #else
            return esp_ptr_internal(ptr) && esp_ptr_byte_accessible(ptr);
        #endif
    #endif /* CONFIG_IDF_TARGET_LINUX */
}