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Add logic to make external RAM usable with malloc()

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Jeroen Domburg
2017-09-22 16:02:39 +08:00
parent c65f12bb45
commit 740f8a79f0
20 changed files with 364 additions and 51 deletions
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13
components/esp32/spiram.c
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@@ -124,11 +124,24 @@ esp_err_t esp_spiram_init()
esp_err_t esp_spiram_add_to_heapalloc()
{
ESP_EARLY_LOGI(TAG, "Adding pool of %dK of external SPI memory to heap allocator", CONFIG_SPIRAM_SIZE/1024);
//Add entire external RAM region to heap allocator. Heap allocator knows the capabilities of this type of memory, so there's
//no need to explicitly specify them.
return heap_caps_add_region((intptr_t)SOC_EXTRAM_DATA_LOW, (intptr_t)SOC_EXTRAM_DATA_LOW + CONFIG_SPIRAM_SIZE-1);
}
static uint8_t *dma_heap;
esp_err_t esp_spiram_reserve_dma_pool(size_t size) {
if (size==0) return ESP_OK; //no-op
ESP_EARLY_LOGI(TAG, "Reserving pool of %dK of internal memory for DMA/internal allocations", size/1024);
dma_heap=heap_caps_malloc(size, MALLOC_CAP_DMA|MALLOC_CAP_INTERNAL);
if (!dma_heap) return ESP_ERR_NO_MEM;
uint32_t caps[]={MALLOC_CAP_DMA|MALLOC_CAP_INTERNAL, 0, MALLOC_CAP_8BIT|MALLOC_CAP_32BIT};
return heap_caps_add_region_with_caps(caps, dma_heap, dma_heap+size-1);
}
size_t esp_spiram_get_size()
{
return CONFIG_SPIRAM_SIZE;