esp32s3 target does not support EXT_RAM_NOINIT_ATTR (IDFGH-13336)

[pragulka]

Answers checklist.

• I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

IDF version.

5.3

Espressif SoC revision.

esp32s3

Operating System used.

Windows

How did you build your project?

Command line with idf.py

If you are using Windows, please specify command line type.

PowerShell

Development Kit.

any

Power Supply used.

USB

What is the expected behavior?

Variables with EXT_RAM_NOINIT_ATTR attribute are placed in PSRAM

What is the actual behavior?

Variables with EXT_RAM_NOINIT_ATTR attribute are placed in IRAM

Steps to reproduce.

1. https://docs.espressif.com/projects/esp-idf/en/v5.3/esp32s3/get-started/windows-setup.html
2. idf.py set-target esp32s3
3. idf.py menuconfig -> enable PSRAM
4. Add global variable in hello_world_main.c, eg: EXT_RAM_NOINIT_ATTR volatile uint8_t _trace[1024*1024];
5. Add dummy read in app_main, eg: (void)_trace[1024*1024 - 1];
6. idf.py build
7. Observe: region `dram0_0_seg' overflowed by 763416 bytes

Debug Logs.

No response

More Information.

No .noinit option under PSRAM config

[Icarus113]

It's not supported yet, we will support it and let you know then

[erkia]

Kudos! Always nice to see that the feature you are looking for was added just a few weeks ago :)