lmdk: How to convert and build loadable modules #488
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| @@ -7,10 +7,65 @@ What is LMDK | |||
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Please add a little bit of context in the commit message. 'Howto tutorial' is not really adding much value.
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Would be easier if build and deploying step worked in CI. However I added richer description I hope that I would be more helpfull.
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How to tutorial descibing process of building and creating headers pack for needs of lmdk. Signed-off-by: Dobrowolski, PawelX <[email protected]>
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requested review from
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| How to prepare MODULE to be loadable | ||
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| Loadable modules are using functions provided by native_system_services which are narrowed to only neccesary and safe functions. For example all dynamic allocations are done on strict size local heap_mem |
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what is the definition of 'safe' in this context?
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| .. code-block:: c | ||
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| DECLARE_LOADABLE_MODULE_API_VERSION(dummy); |
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avoid this term.
mockup or example?
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Stub, placeholder, example
| { | ||
| system_service = *(const struct native_system_agent**)mod_ptr; | ||
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| return &up_down_mixer_interface; |
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haha that's interesting, I was told this component is deprecated...
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@plbossart I don't understand, can you elaborate?
| __attribute__((section(".module"))) | ||
| const struct sof_man_module_manifest dummy_module_manifest = { | ||
| .module = { | ||
| .name = "DUMMY", |
| How to build | ||
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| Designers of lmdk prepared two options of building loadable modules. Using them is depend from needs. |
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consider rewording, this does not read well.
| How to build | ||
| ************ | ||
| Designers of lmdk prepared two options of building loadable modules. Using them is depend from needs. |
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Also explain which one should be use when. You are just listing two solutions without any explanations on pros/cons.
| static struct native_system_service_api* system_service; | ||
| uint32_t heap_mem[2048] __attribute__((section(".heap_mem"))) __attribute__((aligned(4096))); | ||
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| Each module also has to declare as a loadable and has prepared manifest which is specific for each. |
| $ python scripts/lmdk/libraries_build.py -l dummy -k "/path/to/signing/key.pem" | ||
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| Latest headers pack is being deployed with FW and its versioning is keept in sof\src\include\module\module\api_ver.h . Every change in headers must be marked in that header(todo: automation). | ||
| Creating deployment header pack is done by calling: |
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I don't know what a 'headers pack' means.
How to tutorial how to build modules and create headers pack needed for needs of lmdk. Process is described and based on dummy module already available in the sof project.