---
boards/milkymist-one/rtl/lm32_include.v | 7 +
cores/monitor/rtl/gdbstub.rom | 2048 +++++++++++++++++++++++++++++++
cores/monitor/rtl/monitor.v | 12 +
3 files changed, 2067 insertions(+), 0 deletions(-)
create mode 100644 cores/monitor/rtl/gdbstub.rom
diff --git a/boards/milkymist-one/rtl/lm32_include.v
b/boards/milkymist-one/rtl/lm32_include.v
index 9a6b99e..2688840 100644
--- a/boards/milkymist-one/rtl/lm32_include.v
+++ b/boards/milkymist-one/rtl/lm32_include.v
@@ -73,6 +73,8 @@
//`define CFG_ROM_DEBUG_ENABLED
//`define CFG_BREAKPOINTS 32'h0
//`define CFG_WATCHPOINTS 32'h0
+//`define CFG_EXTERNAL_BREAK_ENABLED
+//`define CFG_GDBSTUB_ENABLED
//
// End of common configuration options
@@ -146,6 +148,11 @@
`endif
`endif
+// Derive macro that indicates whether ROM debug is required
+`ifdef CFG_GDBSTUB_ENABLED
+`define CFG_ROM_DEBUG_ENABLED
+`endif
+
// Derive macro that indicates whether we have a barrel-shifter or not
`ifdef CFG_PL_BARREL_SHIFT_ENABLED
`define LM32_BARREL_SHIFT_ENABLED
diff --git a/cores/monitor/rtl/gdbstub.rom b/cores/monitor/rtl/gdbstub.rom
new file mode 100644
index 0000000..f79e5f2
--- /dev/null
+++ b/cores/monitor/rtl/gdbstub.rom
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diff --git a/cores/monitor/rtl/monitor.v b/cores/monitor/rtl/monitor.v
index f41db47..072f3cb 100644
--- a/cores/monitor/rtl/monitor.v
+++ b/cores/monitor/rtl/monitor.v
@@ -30,14 +30,26 @@ module monitor(
input wb_we_i
);
+`ifdef CFG_GDBSTUB_ENABLED
+/* 8kb ram */
+reg [31:0] mem[0:2047];
+initial $readmemh("gdbstub.rom", mem);
+`else
/* 2kb ram */
reg [31:0] mem[0:511];
initial $readmemh("monitor.rom", mem);
+`endif
/* write protect */
+`ifdef CFG_GDBSTUB_ENABLED
+assign ram_we = (wb_adr_i[12] == 1'b1);
+wire [10:0] adr;
+assign adr = wb_adr_i[12:2];
+`else
assign ram_we = (wb_adr_i[10:9] == 2'b11);
wire [9:0] adr;
assign adr = wb_adr_i[10:2];
+`endif
always @(posedge sys_clk) begin
wb_dat_o <= mem[adr];
--
1.7.2.3
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