FreeRTOS tasks may now freely use the PIE coprocessor and HWLP feature.
Just like the FPU, usiing these coprocessors result in the task being pinned
to the core it is currently running on.
It seems gcc is not producing debug information for sections which
are not properly marked as "ax", resulting in missing debug info
for _vector_table, _interrupt_handler and _panic_handler. This can be
verified e.g. with
readelf --debug=info ./build/esp-idf/riscv/CMakeFiles/__idf_riscv.dir/vectors.S.obj
readelf -SW ./build/esp-idf/riscv/CMakeFiles/__idf_riscv.dir/vectors.S.obj
for hello_world example on esp32c3 target. Mark the .exception_vectors.text and
.exception_vectors_table.text sections as writable and allocatable so the debug
info sections are generated.
Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>
This commit mainly targets the ESP32-P4. It adds supports for coprocessors on
RISC-V based targets. The coprocessor save area, describing the used coprocessors
is stored at the end of the stack of each task (highest address) whereas each
coprocessor save area is allocated at the beginning of the task (lowest address).
The context of each coprocessor is saved lazily, by the task that want to use it.
- add hardware stack guard based on assist-debug module
- enable hardware stack guard by default
- disable hardware stack guard for freertos ci.release test
- refactor rtos_int_enter/rtos_int_exit to change SP register inside them
- fix panic_reason.h header for RISC-V
- update docs to include information about the new feature
ESP32-C2 has a single group timer, thus it will use it for the interrupt watchdog,
which is more critical than the task watchdog. The latter is implement in
software thanks to the `esp_timer`component.
Software support for PMS module.
Allows controlled memory access to IRAM (R/W/X) and DRAM0 (R/W)
On/locked by default, configurable in Kconfig (esp_system)
Closes https://jira.espressif.com:8443/browse/IDF-2092
The riscv vectors.S in riscv component contains the trap vector, which is responsible to
defer interrupts and examine if a task context switch is needed, this change cleans up
this code by hiding all freertos details behind on two functions rtos_it_enter/exit and
their implementations are placed in freertos riscv port files.
SoC level exceptions such as watchdog timer and cache errors are now supported.
Such exceptions now triggers a panic, giving more information about how
and when it happened.
