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Merge branch 'feature/cache_32M_map' into 'master'

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spi_flash: 32M bits address flash cache map

Closes IDF-7119 and IDF-4693

See merge request espressif/esp-idf!23021
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C.S.M
2023-04-14 16:01:25 +08:00
parent d635fc0f32 db4375e9e6
commit 247cc7dd87
14 changed files with 243 additions and 57 deletions
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docs/en/api-reference/peripherals/spi_flash/spi_flash_optional_feature.rst
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@@ -123,3 +123,11 @@ Flash Chips List:
1. W25Q256
2. GD25Q256
.. important::
Over 16 MBytes space on flash mentioned above can be only used for `data saving`, like file system. If your data / instructions over 16 MBytes spaces need to be mapped to MMU (so as to be accessed by the CPU), please enable the config `IDF_EXPERIMENTAL_FEATURES` and `CONFIG_SPI_FLASH_32BIT_ADDRESS` and read the limitations following:
1. This option only valid for 4-line flash. Octal flash doesn't need this.
2. Only MMU on ESP chip that supports mapping to a range over 16MB memory supports this config. (Only ESP32S3 supports this up to now)
3. This option is experimental, which means it can't use on all flash chips stable, for more information, please contact Espressif Business support.