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[rtl] Allow M-mode writes to tselect #2571

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Merged
SamuelRiedel merged 1 commit into from
Nov 6, 2026
Merged

[rtl] Allow M-mode writes to tselect #2571

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3 changes: 2 additions & 1 deletion rtl/ibex_cs_registers.sv
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Original file line number Diff line number Diff line change
Expand Up @@ -1770,7 +1770,8 @@ module ibex_cs_registers import ibex_pkg::*, ibex_cheriot_pkg::*; #(
logic [DbgHwBreakNum-1:0] trigger_match;

// Write select
assign tselect_we = csr_we_int & debug_mode_i & (csr_addr_i == CSR_TSELECT);
// tselect is writable from M-mode as well as Debug Mode.
assign tselect_we = csr_we_int & (csr_addr_i == CSR_TSELECT);
for (genvar i = 0; i < DbgHwBreakNum; i++) begin : g_dbg_tmatch_we
assign tmatch_control_we[i] = (i[DbgHwNumLen-1:0] == tselect_q) & csr_we_int & debug_mode_i &
(csr_addr_i == CSR_TDATA1);
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