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Do not support DRET when DebugEn = 0 (#1596)

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When debug mode is disable, DRET instruction is not supported.
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JeanRochCoulon 2023-11-06 08:50:46 +01:00 • committed by GitHub
parent b7e936e754
commit 3fcb7b9c9b
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1 changed files with 6 additions and 2 deletions
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8
core/decoder.sv
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@ -171,8 +171,12 @@ module decoder
// DRET
12'b111_1011_0010: begin
instruction_o.op = ariane_pkg::DRET;
// check that we are in debug mode when executing this instruction
illegal_instr = (!debug_mode_i) ? 1'b1 : illegal_instr;
if (CVA6Cfg.DebugEn) begin
// check that we are in debug mode when executing this instruction
illegal_instr = (!debug_mode_i) ? 1'b1 : illegal_instr;
end else begin
illegal_instr = 1'b1;
end
end
// WFI
12'b1_0000_0101: begin