5dc545290c
Currently, if the user wants to allocate heap on external RAM he needs to enable CONFIG_ESP_SPIRAM and set a threshold defined with CONFIG_ESP_HEAP_MIN_EXTRAM_THRESHOLD. This approach requires that we re-implement `k_malloc` and allocate the memory on the proper region based on the block size. By using the shared multi heap feature the proccess of allocating memory from external memory becomes more fluent and simple. The attribute SMH_REG_ATTR_EXTERNAL was added to reference the external memory. Signed-off-by: Lucas Tamborrino <lucas.tamborrino@espressif.com>
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
/*
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* Copyright (c) 2024 Espressif Systems (Shanghai) Co., Ltd.
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <string.h>
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#include <zephyr/kernel.h>
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#include <rom/ets_sys.h>
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#include <esp_psram.h>
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#include <esp_private/esp_psram_extram.h>
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#include <zephyr/multi_heap/shared_multi_heap.h>
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#define PSRAM_ADDR (DT_REG_ADDR(DT_NODELABEL(psram0)))
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extern int _spiram_heap_start;
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extern int _ext_ram_bss_start;
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extern int _ext_ram_bss_end;
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struct shared_multi_heap_region smh_psram = {
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.addr = (uintptr_t)&_spiram_heap_start,
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.size = CONFIG_ESP_SPIRAM_SIZE,
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.attr = SMH_REG_ATTR_EXTERNAL,
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};
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int esp_psram_smh_init(void)
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{
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shared_multi_heap_pool_init();
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smh_psram.size = CONFIG_ESP_SPIRAM_SIZE - ((int)&_spiram_heap_start - PSRAM_ADDR);
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return shared_multi_heap_add(&smh_psram, NULL);
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}
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void esp_init_psram(void)
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{
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if (esp_psram_init()) {
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ets_printf("Failed to Initialize external RAM, aborting.\n");
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return;
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}
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if (esp_psram_get_size() < CONFIG_ESP_SPIRAM_SIZE) {
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ets_printf("External RAM size is less than configured.\n");
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}
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if (esp_psram_is_initialized()) {
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if (!esp_psram_extram_test()) {
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ets_printf("External RAM failed memory test!");
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return;
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}
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}
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memset(&_ext_ram_bss_start, 0,
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(&_ext_ram_bss_end - &_ext_ram_bss_start) * sizeof(_ext_ram_bss_start));
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}
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