Mirrors/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2026-10-02 03:00:34 +03:00
Code Issues Packages Projects Releases Wiki Activity

docs(esp_psram): clarify carve-out location is at upper end of PSRAM

Browse Source 
The previous wording "top of PSRAM" was ambiguous: the carve-out is
actually mapped at the highest physical addresses of PSRAM (after the
rodata, text, and main heap mappings). Update the Kconfig help text for
SPIRAM_ENC_EXEMPT and SPIRAM_ENC_EXEMPT_SIZE, the External RAM
documentation, and the internal layout comment to say "upper end of PSRAM
(highest physical addresses)" instead.
This commit is contained in:
Mahavir Jain
2026-05-20 10:28:17 +05:30
parent 231dc0e884
commit 9dff0c23b7
3 changed files with 8 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files
docs/en/api-guides/external-ram.rst
+1 -1
View File
@@ -252,7 +252,7 @@ By default, failure to initialize external RAM will cause the ESP-IDF startup to
Reserving an Unencrypted PSRAM Region
-------------------------------------
Enabling :ref:`CONFIG_SPIRAM_ENC_EXEMPT` reserves a region at the top of PSRAM (sized by :ref:`CONFIG_SPIRAM_ENC_EXEMPT_SIZE`, in KB, rounded up to the MMU page size) that is mapped without encryption. This region is registered as a separate heap pool reachable only via the ``MALLOC_CAP_SPIRAM_NO_ENC`` capability. The rest of PSRAM (and flash) remains encrypted.
Enabling :ref:`CONFIG_SPIRAM_ENC_EXEMPT` reserves a region at the upper end of PSRAM (highest physical addresses; sized by :ref:`CONFIG_SPIRAM_ENC_EXEMPT_SIZE`, in KB, rounded up to the MMU page size) that is mapped without encryption. This region is registered as a separate heap pool reachable only via the ``MALLOC_CAP_SPIRAM_NO_ENC`` capability. The rest of PSRAM (and flash) remains encrypted.
.. warning::