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frontend: Report the documented stall polarity in the inst64 events #187

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Merged
DanielKellerM merged 1 commit into from
Aug 17, 2026
Merged

frontend: Report the documented stall polarity in the inst64 events #187

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4 changes: 0 additions & 4 deletions src/frontend/inst64/idma_inst64_events.sv
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Original file line number Diff line number Diff line change
Expand Up @@ -91,10 +91,6 @@ module idma_inst64_events #(
events_o.obi_wr_req = obi_req_i.req && obi_res_i.gnt && obi_req_i.a.we;
events_o.obi_rd_req = obi_req_i.req && obi_res_i.gnt && ~obi_req_i.a.we;

// buffer
events_o.w_stall = axi_rsp_i.w_ready && !axi_req_i.w_valid;
events_o.r_stall = !axi_req_i.r_ready && axi_rsp_i.r_valid;

// busy
events_o.dma_busy = busy_i;
end
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4 changes: 2 additions & 2 deletions test/frontend/tb_idma_inst64_axi_copy.sv
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Expand Up @@ -87,12 +87,12 @@ module tb_idma_inst64_axi_copy;
ev_field_ok[EvRDone ] = ev.r_done === (bus_req.r_ready && bus_res.r_valid);
// r_bw duplicates r_done in the RTL; compare it to the pins, never to ev.r_done.
ev_field_ok[EvRBw ] = ev.r_bw === (bus_req.r_ready && bus_res.r_valid);
ev_field_ok[EvRStall ] = ev.r_stall === (!bus_req.r_ready && bus_res.r_valid);
ev_field_ok[EvRStall ] = ev.r_stall === (bus_req.r_ready && !bus_res.r_valid);

ev_field_ok[EvWValid ] = ev.w_valid === bus_req.w_valid;
ev_field_ok[EvWReady ] = ev.w_ready === bus_res.w_ready;
ev_field_ok[EvWDone ] = ev.w_done === w_hs;
ev_field_ok[EvWStall ] = ev.w_stall === (bus_res.w_ready && !bus_req.w_valid);
ev_field_ok[EvWStall ] = ev.w_stall === (bus_req.w_valid && !bus_res.w_ready);
ev_field_ok[EvBytes ] = ev.num_bytes_written ===
(w_hs ? 32'($countones(bus_req.w.strb)) : 32'd0);

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