Make ROM writeable unless the lock is set.
---
cores/monitor/rtl/monitor.v | 6 ++++--
cores/monitor/test/tb_monitor.v | 1 +
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/cores/monitor/rtl/monitor.v b/cores/monitor/rtl/monitor.v
index eee7664..d37d54e 100644
--- a/cores/monitor/rtl/monitor.v
+++ b/cores/monitor/rtl/monitor.v
@@ -20,6 +20,8 @@ module monitor(
input sys_clk,
input sys_rst,
+ input write_lock,
+
input [31:0] wb_adr_i,
output reg [31:0] wb_dat_o,
input [31:0] wb_dat_i,
@@ -42,11 +44,11 @@ initial $readmemh("monitor.rom", mem);
/* write protect */
`ifdef CFG_GDBSTUB_ENABLED
-assign ram_we = (wb_adr_i[12] == 1'b1);
+assign ram_we = (wb_adr_i[12] == 1'b1) | ~write_lock;
wire [10:0] adr;
assign adr = wb_adr_i[12:2];
`else
-assign ram_we = (wb_adr_i[10:9] == 2'b11);
+assign ram_we = (wb_adr_i[10:9] == 2'b11) | ~write_lock;
wire [9:0] adr;
assign adr = wb_adr_i[10:2];
`endif
diff --git a/cores/monitor/test/tb_monitor.v b/cores/monitor/test/tb_monitor.v
index 2505a91..077b812 100644
--- a/cores/monitor/test/tb_monitor.v
+++ b/cores/monitor/test/tb_monitor.v
@@ -17,6 +17,7 @@ reg dat;
monitor dut(
.sys_clk(sys_clk),
.sys_rst(sys_rst),
+ .write_lock(1'b1),
.wb_stb_i(wb_stb_i),
.wb_cyc_i(wb_cyc_i),
.wb_ack_o(wb_ack_o),
--
1.7.2.5
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