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[rom_ctrl,dv] Tweak randomisation of bad mubi4_t values #21335

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Feb 14, 2024
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[rom_ctrl,dv] Tweak randomisation of bad mubi4_t values #21335

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14 changes: 9 additions & 5 deletions hw/ip/rom_ctrl/dv/env/seq_lib/rom_ctrl_corrupt_sig_fatal_chk_vseq.sv
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Original file line number Diff line number Diff line change
Expand Up @@ -130,15 +130,13 @@ class rom_ctrl_corrupt_sig_fatal_chk_vseq extends rom_ctrl_base_vseq;
// module. To test this rom_select_bus_o is forced with any value other than MuBi4True and
// MuBi4False.
MuxMubi: begin
bit [3:0] rand_var;
pick_err_inj_point();
mubi4_test_invalid(prim_mubi_pkg::mubi4_t'(rand_var));
force_sig("tb.dut.gen_fsm_scramble_enabled.u_checker_fsm.rom_select_bus_o", rand_var);
force_sig("tb.dut.gen_fsm_scramble_enabled.u_checker_fsm.rom_select_bus_o",
get_invalid_mubi4());
check_for_alert();
dut_init();
pick_err_inj_point();
mubi4_test_invalid(prim_mubi_pkg::mubi4_t'(rand_var));
force_sig("tb.dut.u_mux.sel_bus_q", rand_var);
force_sig("tb.dut.u_mux.sel_bus_q", get_invalid_mubi4());
check_for_alert();
end
// The mux that arbitrates between the checker and the bus gives access to the checker at
Expand Down Expand Up @@ -299,4 +297,10 @@ class rom_ctrl_corrupt_sig_fatal_chk_vseq extends rom_ctrl_base_vseq;
wait_with_bound(wait_clks);
endtask

function prim_mubi_pkg::mubi4_t get_invalid_mubi4();
logic [3:0] val;
`DV_CHECK_STD_RANDOMIZE_WITH_FATAL(val, mubi4_test_invalid(mubi4_t'(val));)
return mubi4_t'(val);
endfunction

endclass : rom_ctrl_corrupt_sig_fatal_chk_vseq
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