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change(heap): reserve DMA pool with low priority MALLOC_CAP_DEFAULT caps

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wuzhenghui
2026-07-09 17:37:14 +08:00
parent afede76609
commit 82712313ea
6 changed files with 26 additions and 31 deletions
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components/esp_psram/Kconfig.spiram.common
+1 -1
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@@ -104,7 +104,7 @@ config SPIRAM_MALLOC_RESERVE_INTERNAL
that the internal memory is entirely filled up. This causes allocations that are specifically done in
internal memory, for example the stack for new tasks or memory to service DMA or have memory that's
also available when SPI cache is down, to fail. This option reserves a pool specifically for requests
like that; the memory in this pool is not given out when a normal malloc() is called.
like that; a normal malloc() can fall back to the pool only after all other internal are exhausted.
Set this to 0 to disable this feature.
components/esp_psram/esp_psram.c
+1 -1
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@@ -488,7 +488,7 @@ esp_err_t esp_psram_extram_reserve_dma_pool(size_t size)
return ESP_ERR_NO_MEM;
}
uint32_t caps[] = {0, MALLOC_CAP_DMA | MALLOC_CAP_INTERNAL, MALLOC_CAP_8BIT | MALLOC_CAP_32BIT};
uint32_t caps[] = {0, MALLOC_CAP_DMA | MALLOC_CAP_INTERNAL, MALLOC_CAP_DEFAULT | MALLOC_CAP_8BIT | MALLOC_CAP_32BIT};
esp_err_t e = heap_caps_add_region_with_caps(caps, (intptr_t)dma_heap, (intptr_t)dma_heap + next_size - 1);
if (e != ESP_OK) {
return e;
components/esp_psram/include/esp_private/esp_psram_extram.h
+6 -1
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@@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2022-2026 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -37,6 +37,11 @@ esp_err_t esp_psram_extram_add_to_heap_allocator(void);
/**
* @brief Reserve a pool of internal memory for specific DMA/internal allocations
*
* Carves out @p size bytes from the regular internal heaps and registers the
* region as separate heap pool with new priority-based caps: medium priority for
* MALLOC_CAP_DMA | MALLOC_CAP_INTERNAL, and low priority for MALLOC_CAP_DEFAULT.
* malloc() uses the pool only after other internal heaps are exhausted.
*
* @param size Size of reserved pool in bytes
*
* @return