esp-idf/components/esp_mm/Kconfig

menu "ESP-MM: Memory Management Configurations"

    config ESP_MM_CACHE_MSYNC_C2M_CHUNKED_OPS
        depends on SOC_CACHE_WRITEBACK_SUPPORTED
        bool "Enable esp_cache_msync C2M chunked operation"
        help
            `esp_cache_msync` C2M direction takes critical sections, which means during
            the operation, the interrupts are disabled. Whereas Cache writebacks for
            large buffers could be especially time intensive, and might cause interrupts
            to be disabled for a significant amount of time.

            Sometimes you want other ISRs to be responded during this C2M process.
            This option is to slice one C2M operation into multiple chunks,
            with CONFIG_ESP_MM_CACHE_MSYNC_C2M_CHUNKED_OPS_MAX_LEN max len. This will give you
            a breath during the C2M process as sometimes the C2M process is quite long.

            Note if the buffer processed by the `esp_cache_msync` (C2M sliced) is interrupted by an ISR,
            and this ISR also accesses this buffer, this may lead to data coherence issue.

    config ESP_MM_CACHE_MSYNC_C2M_CHUNKED_OPS_MAX_LEN
        hex "Max len in bytes per C2M chunk"
        depends on ESP_MM_CACHE_MSYNC_C2M_CHUNKED_OPS
        range 0 0x80000
        default 0x20000 if IDF_TARGET_ESP32P4
        default 0x2000 if IDF_TARGET_ESP32S2
        default 0x8000 if IDF_TARGET_ESP32S3
        help
            Max len in bytes per C2M chunk, operations with size over the max len will be
            sliced into multiple chunks.

endmenu