ESP32 different mappings for PRO/APP cpus
Posted: Mon Aug 26, 2024 6:05 am
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.
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.