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docs(psram): sync psram noinit description

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Chen Jichang
2024-09-06 14:13:03 +08:00
parent b63ac1ce9b
commit bf34e2547d
4 changed files with 4 additions and 5 deletions
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docs/en/api-guides/external-ram.rst
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@@ -54,7 +54,7 @@ ESP-IDF fully supports the use of external RAM in applications. Once the externa
* :ref:`external_ram_config_capability_allocator`
* :ref:`external_ram_config_malloc` (default)
* :ref:`external_ram_config_bss`
:esp32: * :ref:`external_ram_config_noinit`
* :ref:`external_ram_config_noinit`
:SOC_SPIRAM_XIP_SUPPORTED: * :ref:`external_ram_config_xip`
.. _external_ram_config_memory_map:

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docs/en/api-guides/memory-types.rst
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@@ -42,7 +42,7 @@ Constant data may also be placed into DRAM, for example if it is used in an non-
The macro ``__NOINIT_ATTR`` can be used as attribute to place data into ``.noinit`` section. The values placed into this section will not be initialized at startup and should keep its value after software restart.
.. only:: esp32
.. only:: SOC_SPIRAM_SUPPORTED
By applying the ``EXT_RAM_NOINIT_ATTR`` macro, non-initialized value could also be placed in external RAM. To do this, the :ref:`CONFIG_SPIRAM_ALLOW_NOINIT_SEG_EXTERNAL_MEMORY` needs to be enabled. See :ref:`external_ram_config_noinit`. If the :ref:`CONFIG_SPIRAM_ALLOW_NOINIT_SEG_EXTERNAL_MEMORY` is not enabled, ``EXT_RAM_NOINIT_ATTR`` will behave just as ``__NOINIT_ATTR``, it will make data to be placed into ``.noinit`` segment in internal RAM.