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[BUG] <32 bit bitstream for FPGA config fails> #2819

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AngelaGonzalezMarino opened this issue Mar 11, 2025 · 4 comments
Open
1 task done

[BUG] <32 bit bitstream for FPGA config fails> #2819

AngelaGonzalezMarino opened this issue Mar 11, 2025 · 4 comments
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Type:Bug For bugs in the RTL, Documentation, Verification environment or Tool and Build system

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@AngelaGonzalezMarino
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Is there an existing CVA6 bug for this?

  • I have searched the existing bug issues

Bug Description

After 2ef1c1b the bitstream using FPGA config fails (no message from bootrom).
If the C extension is enabled, everything seems OK.
@Gchauvon do you have any idea why not using the C extension would fail after this change?
@AngelaGonzalezMarino AngelaGonzalezMarino added the Type:Bug For bugs in the RTL, Documentation, Verification environment or Tool and Build system label Mar 11, 2025
@Gchauvon
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Do you mean that you remove C extension from cv32a6_imac_sv32 and it fails to boot ?

@AngelaGonzalezMarino
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AngelaGonzalezMarino commented Mar 11, 2025 •
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I expected so, but it is not the case.
Yes.
Also, cv32a6_ima_sv32_fpga as it is fails, and enabling C extension is OK

@Gchauvon
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Those two configuration are quite different when comparing XXX_config_pkg.sv. It recommend to go from cv32a6_imac_sv32 to cv32a6_ima_sv32_fgpa changing one parameter at a time, hoping to find a clue on where the issue occures.

I will generate a cv32a6_ima_sv32_fgpa bitstream and examinate the xilinx log looking for warnings or errors related to 2ef1c1b

@AngelaGonzalezMarino
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Sorry I did something wrong before, removing the C extension from cv32a6_imac_sv32 fails to boot too

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@Gchauvon @AngelaGonzalezMarino