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[dv,formal] constrain CSR values for mvendorid and mimpid

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These values were originally constants but now are parameters.
Constrain them for formal.

Signed-off-by: Gary Guo <gary.guo@lowrisc.org>
This commit is contained in:
Gary Guo 2025-04-26 19:13:18 +01:00 • committed by Marno van der Maas
parent 2c2dc5040f
commit 10270b6e9a
1 changed files with 6 additions and 1 deletions
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7
dv/formal/check/top.sv
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@ -103,6 +103,9 @@ module top import ibex_pkg::*; #(
input logic scan_rst_ni input logic scan_rst_ni
); );
localparam logic [31:0] CSR_MVENDORID_VALUE = 32'b0;
localparam logic [31:0] CSR_MIMPID_VALUE = 32'b0;
default clocking @(posedge clk_i); endclocking default clocking @(posedge clk_i); endclocking
ibex_top #( ibex_top #(
@ -113,7 +116,9 @@ ibex_top #(
.RV32E(RV32E), .RV32E(RV32E),
.BranchTargetALU(1'b1), .BranchTargetALU(1'b1),
.PMPEnable(1'b1), .PMPEnable(1'b1),
.PMPNumRegions(PMPNumRegions) .PMPNumRegions(PMPNumRegions),
.CsrMvendorId (CSR_MVENDORID_VALUE),
.CsrMimpId (CSR_MIMPID_VALUE)
) ibex_top_i(.*); ) ibex_top_i(.*);
// Core constraints // Core constraints