Wire things up, and fix circular logic in issue.

[firearm.git] / system.v

diff --git a/system.v b/system.v
index 0c25de3a9e3f28b6fb13212fb16fc762cf5ba39e..e33bbff1ede9eb05cfc1741006ce28a35b9e7169 100644 (file)
--- a/system.v
+++ b/system.v
@@ -32,6 +32,22 @@ module System(input clk, output wire bubbleshield, output wire [31:0] insn, outp
        wire icache_rd_req;
        wire icache_rd_wait;
        wire [31:0] icache_rd_data;
+       
+       wire stall_cause_issue;
+       
+       wire stall_in_fetch = stall_cause_issue;
+       wire stall_in_issue = 0;
+       
+       wire bubble_out_fetch;
+       wire bubble_out_issue;
+       wire [31:0] insn_out_fetch;
+       wire [31:0] insn_out_issue;
+       wire [31:0] pc_out_fetch;
+       wire [31:0] pc_out_issue;
+       
+       assign bubbleshield = bubble_out_issue;
+       assign insn = insn_out_issue;
+       assign pc = pc_out_issue;
 
        BusArbiter busarbiter(.bus_req(bus_req), .bus_ack(bus_ack));
 
@@ -56,7 +72,16 @@ module System(input clk, output wire bubbleshield, output wire [31:0] insn, outp
                .Nrst(1 /* XXX */),
                .rd_addr(icache_rd_addr), .rd_req(icache_rd_req),
                .rd_wait(icache_rd_wait), .rd_data(icache_rd_data),
-               .stall(0 /* XXX */), .jmp(0 /* XXX */), .jmppc(0 /* XXX */),
-               .bubble(bubbleshield), .insn(insn), .pc(pc));
-
+               .stall(stall_in_fetch), .jmp(0 /* XXX */), .jmppc(0 /* XXX */),
+               .bubble(bubble_out_fetch), .insn(insn_out_fetch),
+               .pc(pc_out_fetch));
+       
+       Issue issue(
+               .clk(clk),
+               .Nrst(1 /* XXX */),
+               .stall(stall_in_issue), .flush(0 /* XXX */),
+               .inbubble(bubble_out_fetch), .insn(insn_out_fetch),
+               .inpc(pc_out_fetch), .cpsr(0 /* XXX */),
+               .outstall(stall_cause_issue), .outbubble(bubble_out_issue),
+               .outpc(pc_out_issue), .outinsn(insn_out_issue));
 endmodule