From 849641f31e283f35aaec19f6dd5c3ddf6ddf505e Mon Sep 17 00:00:00 2001 From: Noah Boorstin Date: Mon, 22 Mar 2021 18:24:31 -0400 Subject: [PATCH] busybear: add better warning on illegal instruction ...also it seems that mret is being picked up as an illegal instruction?? --- wally-pipelined/testbench/testbench-busybear.sv | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/wally-pipelined/testbench/testbench-busybear.sv b/wally-pipelined/testbench/testbench-busybear.sv index 4015e8c8..6f957efa 100644 --- a/wally-pipelined/testbench/testbench-busybear.sv +++ b/wally-pipelined/testbench/testbench-busybear.sv @@ -262,8 +262,14 @@ module testbench_busybear(); end always @(dut.hart.priv.csr.genblk1.csrm.MCAUSE_REGW) begin + if (dut.hart.priv.csr.genblk1.csrm.MCAUSE_REGW == 2 && instrs != 0) begin + $display("!!!!!! illegal instruction !!!!!!!!!!"); + $display("(as a reminder, MCAUSE and MEPC are set by this)"); + $display("at %0t ps, instr %0d, HADDR %x", $time, instrs, HADDR); + `ERROR + end if (dut.hart.priv.csr.genblk1.csrm.MCAUSE_REGW == 5 && instrs != 0) begin - $display("!!!!!!illegal (physical) memory access !!!!!!!!!!"); + $display("!!!!!! illegal (physical) memory access !!!!!!!!!!"); $display("(as a reminder, MCAUSE and MEPC are set by this)"); $display("at %0t ps, instr %0d, HADDR %x", $time, instrs, HADDR); `ERROR