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Hold off IRQ when AMO is past the point of no return

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Luke Wren 2021-12-06 07:45:13 +00:00
parent 260491405a
commit 4c532240f8
1 changed files with 2 additions and 1 deletions
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3
hdl/hazard3_core.v
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@ -604,7 +604,8 @@ always @ (posedge clk or negedge rst_n) begin
// taken once this load/store moves to the next stage: if another load/store
// is chasing down the pipeline then this is immediately suppressed by the
// IRQ entry, before its address phase can begin.
xm_delay_irq_entry <= bus_aph_req_d && !bus_aph_ready_d;
xm_delay_irq_entry <= bus_aph_req_d && !bus_aph_ready_d ||
d_memop_is_amo && (x_amo_phase == 3'h2 || x_amo_phase == 3'h3 && !bus_dph_ready_d);
if (!x_stall)
prev_instr_was_32_bit <= df_cir_use == 2'd2;
end