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Merge branch 'feature/make_heap_alloc_caps_align_memory2_v5.3' into 'release/v5.3'

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Align memory requested from heap component to hw requirements (v5.3)

See merge request espressif/esp-idf!31195
This commit is contained in:
Marius Vikhammer
2024-06-11 09:42:04 +08:00
parent a71f265d25 df4195062d
commit 45c7eb4d4b
15 changed files with 323 additions and 53 deletions
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docs/en/api-reference/system/mem_alloc.rst
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@@ -107,7 +107,8 @@ Use the ``MALLOC_CAP_DMA`` flag to allocate memory which is suitable for use wit
.. only SOC_SPIRAM_SUPPORTED and not esp32::
The EDMA hardware feature allows DMA buffers to be placed in external PSRAM, but there may be additional alignment constraints. Consult the {IDF_TARGET_NAME} Technical Reference Manual for details. To allocate a DMA-capable external memory buffer, use the ``MALLOC_CAP_SPIRAM`` capabilities flag together with :cpp:func:`heap_caps_aligned_alloc` with the necessary alignment specified.
The EDMA hardware feature allows DMA buffers to be placed in external PSRAM, but there may be additional alignment constraints. Consult the {IDF_TARGET_NAME} Technical Reference Manual for details. To allocate a DMA-capable external memory buffer, use the ``MALLOC_CAP_SPIRAM | MALLOC_CAP_DMA`` capabilities flags; the heap allocator will take care of alignment requirements imposed by the cache and DMA subsystems. If a peripheral has additional alignment requirements, you can use :cpp:func:`heap_caps_aligned_alloc` with the necessary alignment specified.
.. _32-bit accessible memory: