Trap delegation to Supervisor mode

Susmita Nayak

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May 3, 2024, 6:20:57 AMMay 3

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Hi All,

I am looking to learn trap delegation to S MODE. I want to refer to some assembly programs.

Can anyone help me?

Thanks,

Susmita

Jaume Gauchola

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May 6, 2024, 3:24:56 AMMay 6

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Hi Susmita,

What are your doubts about trap delegation in S-mode (CSR configuration, handling functions, virtual memory,...)?
Don't hesitate to ask!

Best regards,
Jaume

Charles Papon

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May 6, 2024, 4:14:59 AMMay 6

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Hi,

Here are a few exemples of trap delegations (the code run in machine mode as a background, and localy elevate itself) :
https://github.com/SpinalHDL/NaxSoftware/blob/865b8c1465cb24c78423d16fd6dd74d12f643bda/baremetal/supervisor/src/crt.S#L61

The macros are defined into https://github.com/SpinalHDL/NaxSoftware/blob/865b8c1465cb24c78423d16fd6dd74d12f643bda/baremetal/driver/privileged.h

That crt.S is used to run some regressions test on a cpu.

Regards
Charles

Susmita Nayak

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May 7, 2024, 7:30:22 AMMay 7

to RISC-V SW Dev, charles....@gmail.com, jaume.g...@semidynamics.com, Susmita Nayak

Thanks. Will check the same and get back.

Regards,

Susmita

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