github-mirrors/cva6
1
0
Fork 0
mirror of https://github.com/openhwgroup/cva6.git synced 2025-04-23 13:47:13 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions 7

Initialize npc reg with boot adress on start

Browse source
This commit is contained in:
Florian Zaruba 2017-08-16 21:37:32 +02:00
parent cd058f8028
commit b475af93f3
1 changed files with 10 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

10
src/debug_unit.sv
View file

@ -23,6 +23,8 @@ module debug_unit (
input logic clk_i, // Clock
input logic rst_ni, // Asynchronous reset active low
input logic [63:0] boot_addr_i,
input scoreboard_entry commit_instr_i,
input logic commit_ack_i,
input exception ex_i, // instruction caused an exception
@ -65,6 +67,7 @@ module debug_unit (
logic [63:0] rdata_n, rdata_q;
// save previous PC
logic [63:0] dbg_ppc_n, dbg_ppc_q;
logic reset_n, reset_q;
// ---------------
// Debug Register
// ---------------
@ -105,6 +108,8 @@ module debug_unit (
resume_req = 1'b0;
// update the previous PC if got a valid commit
dbg_ppc_n = (commit_ack_i) ? commit_instr_i.pc : dbg_ppc_q;
// flag to indicate that we came from a reset state
reset_n = (commit_ack_i) ? 1'b0 : reset_q;
// debug registers
dbg_ie_n = dbg_ie_q;
dbg_cause_n = dbg_cause_q;
@ -146,6 +151,9 @@ module debug_unit (
DBG_NPC: begin
if (debug_halted_o)
rdata_n = commit_instr_i.pc;
// if we came from reset - output the boot address
if (reset_q)
rdata_n = boot_addr_i;
end
DBG_PPC: begin
@ -309,6 +317,7 @@ module debug_unit (
always_ff @(posedge clk_i or negedge rst_ni) begin
if (~rst_ni) begin
CS <= RUNNING;
reset_q <= 1'b1;
rdata_q <= '0;
rvalid_q <= 1'b0;
dbg_ppc_q <= 64'b0;
@ -320,6 +329,7 @@ module debug_unit (
dbg_hit_q <= 1'b0;
end else begin
CS <= NS;
reset_q <= reset_n;
rdata_q <= rdata_n;
rvalid_q <= rvalid_n;
dbg_ppc_q <= dbg_ppc_n;