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cpu/esp32: build the SDK bootloader from source #17457

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wants to merge 6 commits into from
Closed

cpu/esp32: build the SDK bootloader from source #17457

wants to merge 6 commits into from

Commits on Jan 24, 2022

  1. REMOVEME

    @gschorcht
    gschorcht committed Jan 24, 2022
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  2. cpu/esp*: small documentation fixes 

    Only formatting issues solved, no content changes.
    @gschorcht
    gschorcht committed Jan 24, 2022
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  3. cpu/esp_common: use full path for BOOTLOADER_BIN

    @gschorcht
    gschorcht committed Jan 24, 2022
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  4. pkg/esp32_sdk: use bootloader as RIOT module 

    Up to now, there were four versions of prebuilt bootloaders for the ESP32 with different settings of logging and color logging. These bootloaders were manually built from the SDK and shipped with RIOT-OS source code.
However there are more settings that affect the bootloader build that are relevant to the app or final board that uses this bootloader. This commit builds the `bootloader.bin` file from the ESP32 SDK source
code. It is built as a module `esp_bootloader` which at the moment doesn't generate any object code for the application and only produces a `bootloader.bin` file set to the `BOOTLOADER_BIN` make variable for the `esptool.inc.mk` to flash.
    @gschorcht
    gschorcht committed Jan 24, 2022
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  5. pkg/esp32_sdk: patch bootloader ld script 

    In ESP-IDF archives are generated for all components. The ld script for the bootloader uses archive names of some components to place data and code to the first 64 kByte of IRAM. Since RIOT uses object files instead of archives, the ld script for the bootloader has to modified.
    @gschorcht
    gschorcht committed Jan 24, 2022
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  6. cpu/esp32: bootloader is compiled from source as module

    @gschorcht
    gschorcht committed Jan 24, 2022
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