X-Git-Url: http://git.joshuawise.com/firearm.git/blobdiff_plain/45fa96c0a2fd6e490690cff69dd694a3dce3ab35..a221c031dbfe61723a0313763dcd124acc49c455:/system.v diff --git a/system.v b/system.v index 0c25de3..e33bbff 100644 --- 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