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✨ add time[h] CSRs #556

Merged
merged 6 commits into from
Mar 17, 2023
Merged

✨ add time[h] CSRs #556

merged 6 commits into from
Mar 17, 2023

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stnolting
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This PR adds the user-level time and timeh counter CSRs.

ℹ️ The time[h] CSRs are just another shadow copy of the machine-mode cycle counters (mcycle[h]).

On some simple platforms, cycle count might represent a valid implementation of RDTIME, in which case RDTIME and RDCYCLE may return the same result. - RISC-V ISA spec.

@stnolting stnolting added risc-v compliance Modification to comply with official RISC-V specs. HW hardware-related labels Mar 17, 2023
@stnolting stnolting self-assigned this Mar 17, 2023
@stnolting stnolting marked this pull request as ready for review March 17, 2023 18:39
@stnolting stnolting merged commit ed58324 into main Mar 17, 2023
@stnolting stnolting deleted the add_time_csrs branch March 17, 2023 19:10
@stnolting stnolting restored the add_time_csrs branch March 17, 2023 19:10
@stnolting stnolting deleted the add_time_csrs branch March 17, 2023 19:10
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HW hardware-related risc-v compliance Modification to comply with official RISC-V specs.
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