X-Git-Url: http://git.joshuawise.com/firearm.git/blobdiff_plain/5d9760a4dd32206c26c9f20fb995d29160bcbf71..f61f8d6fb3090fa94005148aef02a219ad088da8:/system.v diff --git a/system.v b/system.v index 1035489..a4d13a4 100644 --- a/system.v +++ b/system.v @@ -1,6 +1,6 @@ `define BUS_ICACHE 0 -module System(input clk, output wire bubbleshield, output wire [31:0] insn, output wire [31:0] pc); +module System(input clk); wire [7:0] bus_req; wire [7:0] bus_ack; wire [31:0] bus_addr; @@ -8,9 +8,11 @@ module System(input clk, output wire bubbleshield, output wire [31:0] insn, outp wire [31:0] bus_wdata; wire bus_rd, bus_wr; wire bus_ready; - - wire bus_req_icache = bus_req[`BUS_ICACHE]; + + wire bus_req_icache; + assign bus_req = {7'b0, bus_req_icache}; wire bus_ack_icache = bus_ack[`BUS_ICACHE]; + wire [31:0] bus_addr_icache; wire [31:0] bus_wdata_icache; wire bus_rd_icache; @@ -30,7 +32,26 @@ 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_cause_execute; + + wire [31:0] decode_out_op0, decode_out_op1, decode_out_op2; + wire decode_out_carry; + wire [3:0] regfile_read_0, regfile_read_1, regfile_read_2; + wire [31:0] regfile_rdata_0, regfile_rdata_1, regfile_rdata_2; + wire execute_out_stall, execute_out_bubble; + wire execute_out_write_reg; + wire [3:0] execute_out_write_num; + wire [31:0] execute_out_write_data; + + 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; + BusArbiter busarbiter(.bus_req(bus_req), .bus_ack(bus_ack)); ICache icache( @@ -42,7 +63,7 @@ module System(input clk, output wire bubbleshield, output wire [31:0] insn, outp .bus_addr(bus_addr_icache), .bus_rdata(bus_rdata), .bus_wdata(bus_wdata_icache), .bus_rd(bus_rd_icache), .bus_wr(bus_wr_icache), .bus_ready(bus_ready)); - + BlockRAM blockram( .clk(clk), .bus_addr(bus_addr), .bus_rdata(bus_rdata_blockram), @@ -51,10 +72,53 @@ module System(input clk, output wire bubbleshield, output wire [31:0] insn, outp Fetch fetch( .clk(clk), - .Nrst(1 /* XXX */), + .Nrst(1'b1 /* 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_cause_issue), .jmp(1'b0 /* XXX */), .jmppc(32'b0 /* XXX */), + .bubble(bubble_out_fetch), .insn(insn_out_fetch), + .pc(pc_out_fetch)); + + Issue issue( + .clk(clk), + .Nrst(1'b1 /* XXX */), + .stall(stall_cause_execute), .flush(1'b0 /* XXX */), + .inbubble(bubble_out_fetch), .insn(insn_out_fetch), + .inpc(pc_out_fetch), .cpsr(32'b0 /* XXX */), + .outstall(stall_cause_issue), .outbubble(bubble_out_issue), + .outpc(pc_out_issue), .outinsn(insn_out_issue)); + + RegFile regfile( + .clk(clk), + .read_0(regfile_read_0), .read_1(regfile_read_1), .read_2(regfile_read_2), + .rdata_0(regfile_rdata_0), .rdata_1(regfile_rdata_1), .rdata_2(regfile_rdata_2), + .write(4'b0), .write_req(1'b0), .write_data(10 /* XXX */)); + + Decode decode( + .clk(clk), + .insn(insn_out_fetch), .inpc(pc_out_fetch), .incpsr(32'b0 /* XXX */), + .op0(decode_out_op0), .op1(decode_out_op1), .op2(decode_out_op2), + .carry(decode_out_carry), + .read_0(regfile_read_0), .read_1(regfile_read_1), .read_2(regfile_read_2), + .rdata_0(regfile_rdata_0), .rdata_1(regfile_rdata_1), .rdata_2(regfile_rdata_2)); + + Execute execute( + .clk(clk), .Nrst(1'b0), + .stall(1'b0 /* XXX */), .flush(1'b0 /* XXX */), + .inbubble(bubble_out_issue), .pc(pc_out_issue), .insn(insn_out_issue), + .cpsr(32'b0 /* XXX */), .op0(decode_out_op0), .op1(decode_out_op1), + .op2(decode_out_op2), .carry(decode_out_carry), + .outstall(stall_cause_execute), .outbubble(execute_out_bubble), + .write_reg(execute_out_write_reg), .write_num(execute_out_write_num), + .write_data(execute_out_write_data)); + + reg [31:0] clockno = 0; + always @(posedge clk) + begin + clockno <= clockno + 1; + $display("------------------------------------------------------------------------------"); + $display("%3d: FETCH: Bubble: %d, Instruction: %08x, PC: %08x", clockno, bubble_out_fetch, insn_out_fetch, pc_out_fetch); + $display("%3d: ISSUE: Stall: %d, Bubble: %d, Instruction: %08x, PC: %08x", clockno, stall_cause_issue, bubble_out_issue, insn_out_issue, pc_out_issue); + $display("%3d: DECODE: op1 %08x, op2 %08x, op3 %08x, carry %d", clockno, decode_out_op0, decode_out_op1, decode_out_op2, decode_out_carry); + end endmodule