ESP32 different mappings for PRO/APP cpus

[yamamoto]

hi,

reading the ESP32 technical reference manual,
it seems that the MMU for the external memory can be programmed
to use different virt-to-phys mappings for CPUs. (26.3.2.2)
am i reading it correctly?

if so, is it expected to actually work?
ie. is there any software using the feature?
i'm wondering because it seems that ESP-IDF always uses the identical mappings for both CPUs.
https://github.com/espressif/esp-idf/bl ... #L402-L414

i'm interested in spi ram more than spi flash, if it matters.

[ESP_Sprite]

Yes, you can, but I don't think ESP-IDF has any real support for it.

[yamamoto]

thank you.

i confirmed at least trivial cases works with modified nuttx.