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⚠️ rework SoC bus protocol #697

Merged
merged 11 commits into from
Oct 5, 2023
Merged

⚠️ rework SoC bus protocol #697

merged 11 commits into from
Oct 5, 2023

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stnolting
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@stnolting stnolting commented Oct 4, 2023

This PR is a rework of the processor-internal bus system to make it more Wishbone-alike. The individual request signals re and we are replaced by a single request strobe (stb) and a read/write identifier (rw). This allows to simplify (in terms of hardware resources) the CPU's load-store unit as well as all the bus elements (muxes) as a only a single request signal needs to be evaluated.

Pre-PR Protocol

bus_interface

Post-PR Protocol

bus_interface

@stnolting stnolting self-assigned this Oct 4, 2023
@stnolting stnolting added HW hardware-related optimization Make things faster, smaller and more efficient labels Oct 4, 2023
@stnolting stnolting marked this pull request as ready for review October 5, 2023 17:57
@stnolting stnolting merged commit 97859da into main Oct 5, 2023
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@stnolting stnolting deleted the bus_rework branch October 5, 2023 17:57
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