circuitpython/supervisor/shared/port.c

/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2022 Scott Shawcroft for Adafruit Industries
 *
 * 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.
 */

#include "supervisor/port.h"

#include <string.h>

#include "py/runtime.h"

#include "lib/tlsf/tlsf.h"

static tlsf_t heap;

MP_WEAK void port_wake_main_task(void) {
}

MP_WEAK void port_wake_main_task_from_isr(void) {
}

MP_WEAK void port_yield(void) {
}

MP_WEAK void port_boot_info(void) {
}

MP_WEAK void port_heap_init(void) {
    uint32_t *heap_bottom = port_heap_get_bottom();
    uint32_t *heap_top = port_heap_get_top();
    size_t size = (heap_top - heap_bottom) * sizeof(uint32_t);
    heap = tlsf_create_with_pool(heap_bottom, size, size);
}

MP_WEAK void *port_malloc(size_t size, bool dma_capable) {
    void *block = tlsf_malloc(heap, size);
    return block;
}

MP_WEAK void port_free(void *ptr) {
    tlsf_free(heap, ptr);
}

MP_WEAK void port_realloc(void *ptr, size_t size) {
    tlsf_realloc(heap, ptr, size);
}

static void max_size_walker(void *ptr, size_t size, int used, void *user) {
    size_t *max_size = (size_t *)user;
    if (!used && *max_size < size) {
        *max_size = size;
    }
}

MP_WEAK size_t port_heap_get_largest_free_size(void) {
    size_t max_size = 0;
    tlsf_walk_pool(tlsf_get_pool(heap), max_size_walker, &max_size);
    // IDF does this. Not sure why.
    return tlsf_fit_size(heap, max_size);
}