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LLEXT: run non-performance critical code in DRAM #9522

Merged
merged 9 commits into from
Nov 27, 2024
Merged

LLEXT: run non-performance critical code in DRAM #9522

merged 9 commits into from
Nov 27, 2024

Commits on Nov 26, 2024

  1. math: add a missing symbol export 

    norm_int32() is called by LLEXT modules when built with gcc, export
it.

Signed-off-by: Guennadi Liakhovetski <[email protected]>
    @lyakh
    lyakh committed Nov 26, 2024
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  2. rimage: (cosmetic) remove dangling spaces 

    Remove multiple end-of-line spaces in comments.

Signed-off-by: Guennadi Liakhovetski <[email protected]>
    @lyakh
    lyakh committed Nov 26, 2024
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  3. LLEXT: add support for detached executable sections 

    With this commit functions can be marked to be placed in custom
sections, e.g. by adding __attribute__((section(".text.dram"))) to
them. Those sections will then become "detached," i.e. they won't be
linked into the main address space of the module. Instead they will
be linked at a low address, after which Zephyr LLEXT linked will
prepare them to be used at their original location, e.g. in DRAM.
This commit modifies the SOF LLEXT link helper to use low addresses
for linking of such sections.

Signed-off-by: Guennadi Liakhovetski <[email protected]>
    @lyakh
    lyakh committed Nov 26, 2024
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  4. LLEXT: (cosmetic) simplify calling llext_manager_link() 

    Re-use values from the caller instead of re-calculating them in the
function.

Signed-off-by: Guennadi Liakhovetski <[email protected]>
    @lyakh
    lyakh committed Nov 26, 2024
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  5. LLEXT: simplify manifest array address calculation 

    The LLEXT manifest array can be accessed in DRAM, no need to
recalculate its address in SRAM.

Signed-off-by: Guennadi Liakhovetski <[email protected]>
    @lyakh
    lyakh committed Nov 26, 2024
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  6. LLEXT: rimage: add support for detached sections 

    Rimage shouldn't include detached sections in image size calculations
to avoid creating meaninglessly large values.

Signed-off-by: Guennadi Liakhovetski <[email protected]>
    @lyakh
    lyakh committed Nov 26, 2024
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  7. LLEXT: add support for detached sections 

    We link detached sections, to be used in DRAM, at low addresses,
beginning at 0. Add a callback for Zephyr llext to recognise our
detached sections.

Signed-off-by: Guennadi Liakhovetski <[email protected]>
    @lyakh
    lyakh committed Nov 26, 2024
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  8. LLEXT: add a macro to place selected functions in .text.dram 

    With this macro modules can use "__cold" in front of their function
definitions to place them in the .text.dram section, which will force
their execution in DRAM without being copied to SRAM.

Signed-off-by: Guennadi Liakhovetski <[email protected]>
    @lyakh
    lyakh committed Nov 26, 2024
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  9. drc: move .init() and .free() to DRAM 

    DRC's .init() and .free() functions aren't performance-critical,
move them to DRAM for modular builds.

Signed-off-by: Guennadi Liakhovetski <[email protected]>
    @lyakh
    lyakh committed Nov 26, 2024
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