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Flush pipeline when PMP CSRs are cleared #2195

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Flush pipeline when PMP CSRs are cleared #2195

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4 changes: 3 additions & 1 deletion rtl/ibex_id_stage.sv
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Original file line number Diff line number Diff line change
Expand Up @@ -522,7 +522,9 @@ module ibex_id_stage #(
// - When modifying any PMP CSR, PMP check of the next instruction might get invalidated.
// Hence, a pipeline flush is needed to instantiate another PMP check with the updated CSRs.
// - When modifying debug CSRs.
if (csr_op_en_o == 1'b1 && (csr_op_o == CSR_OP_WRITE || csr_op_o == CSR_OP_SET)) begin
if (csr_op_en_o == 1'b1 && (csr_op_o == CSR_OP_WRITE ||
csr_op_o == CSR_OP_SET ||
csr_op_o == CSR_OP_CLEAR)) begin
if (csr_num_e'(instr_rdata_i[31:20]) == CSR_MSTATUS ||
csr_num_e'(instr_rdata_i[31:20]) == CSR_MIE ||
csr_num_e'(instr_rdata_i[31:20]) == CSR_MSECCFG ||
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