X-Git-Url: http://git.joshuawise.com/firearm.git/blobdiff_plain/ee4068391a94ca33bcec919274ef17496c0a7d6b..e9bde5ae66fd6ee69b04b54280e9cbd32ab6c9d2:/system.v?ds=inline diff --git a/system.v b/system.v index a653ea1..b8fc48e 100644 --- a/system.v +++ b/system.v @@ -1,30 +1,190 @@ `define BUS_ICACHE 0 +`define BUS_DCACHE 1 -module System(); +module System(input clk); wire [7:0] bus_req; wire [7:0] bus_ack; wire [31:0] bus_addr; - wire [31:0] bus_data; + wire [31:0] bus_rdata; + 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; + wire bus_req_dcache; + assign bus_req = {6'b0, bus_req_dcache, bus_req_icache}; wire bus_ack_icache = bus_ack[`BUS_ICACHE]; + wire bus_ack_dcache = bus_ack[`BUS_DCACHE]; + wire [31:0] bus_addr_icache; wire [31:0] bus_wdata_icache; wire bus_rd_icache; wire bus_wr_icache; - assign bus_addr = bus_addr_icache; - assign bus_data = bus_wdata_icache; - assign bus_rd = bus_rd_icache; - assign bus_wr = bus_wr_icache; + wire [31:0] bus_addr_dcache; + wire [31:0] bus_wdata_dcache; + wire bus_rd_dcache; + wire bus_wr_dcache; + + wire [31:0] bus_rdata_blockram; + wire bus_ready_blockram; + + assign bus_addr = bus_addr_icache | bus_addr_dcache; + assign bus_rdata = bus_rdata_blockram; + assign bus_wdata = bus_wdata_icache | bus_wdata_dcache; + assign bus_rd = bus_rd_icache | bus_rd_dcache; + assign bus_wr = bus_wr_icache | bus_wr_dcache; + assign bus_ready = bus_ready_blockram; + + wire [31:0] icache_rd_addr; + wire icache_rd_req; + wire icache_rd_wait; + wire [31:0] icache_rd_data; + + wire [31:0] dcache_addr; + wire dcache_rd_req, dcache_wr_req; + wire dcache_rw_wait; + wire [31:0] dcache_wr_data, dcache_rd_data; + + wire [31:0] decode_out_op0, decode_out_op1, decode_out_op2, decode_out_spsr; + wire decode_out_carry; + + wire [3:0] regfile_read_0, regfile_read_1, regfile_read_2, regfile_read_3; + wire [31:0] regfile_rdata_0, regfile_rdata_1, regfile_rdata_2, regfile_rdata_3, regfile_spsr; + + wire execute_out_write_reg; + wire [3:0] execute_out_write_num; + wire [31:0] execute_out_write_data; + wire [31:0] execute_out_op0, execute_out_op1, execute_out_op2; + wire [31:0] jmppc; + wire jmp; + + wire memory_out_write_reg; + wire [3:0] memory_out_write_num; + wire [31:0] memory_out_write_data; + + wire cp_req; + wire cp_ack = 0; + wire cp_busy = 0; + wire cp_rnw; + wire [31:0] cp_read = 0; + wire [31:0] cp_write; + + wire stall_cause_issue; + wire stall_cause_execute; + wire stall_cause_memory; + wire bubble_out_fetch; + wire bubble_out_issue; + wire bubble_out_execute; + wire bubble_out_memory; + wire [31:0] insn_out_fetch; + wire [31:0] insn_out_issue; + wire [31:0] insn_out_execute; + wire [31:0] insn_out_memory; + wire [31:0] pc_out_fetch; + wire [31:0] pc_out_issue; + wire [31:0] pc_out_execute; + wire [31:0] pc_out_memory; + + wire execute_out_backflush; BusArbiter busarbiter(.bus_req(bus_req), .bus_ack(bus_ack)); - ICache( - .rd_addr(), .rd_req(), .rd_wait(), .rd_data(), + + ICache icache( + .clk(clk), + /* XXX reset? */ + .rd_addr(icache_rd_addr), .rd_req(icache_rd_req), + .rd_wait(icache_rd_wait), .rd_data(icache_rd_data), .bus_req(bus_req_icache), .bus_ack(bus_ack_icache), - .bus_addr(bus_addr_icache), .bus_rdata(bus_data), + .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)); + + DCache dcache( + .clk(clk), + .addr(dcache_addr), .rd_req(dcache_rd_req), .wr_req(dcache_wr_req), + .rw_wait(dcache_rw_wait), .wr_data(dcache_wr_data), .rd_data(dcache_rd_data), + .bus_req(bus_req_dcache), .bus_ack(bus_ack_dcache), + .bus_addr(bus_addr_dcache), .bus_rdata(bus_rdata), + .bus_wdata(bus_wdata_dcache), .bus_rd(bus_rd_dcache), + .bus_wr(bus_wr_dcache), .bus_ready(bus_ready)); + + BlockRAM blockram( + .clk(clk), + .bus_addr(bus_addr), .bus_rdata(bus_rdata_blockram), + .bus_wdata(bus_wdata), .bus_rd(bus_rd), .bus_wr(bus_wr), + .bus_ready(bus_ready_blockram)); + + Fetch fetch( + .clk(clk), + .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(stall_cause_issue), .jmp(jmp), .jmppc(jmppc), + .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(execute_out_backflush), + .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), .read_2(regfile_read_3), + .rdata_0(regfile_rdata_0), .rdata_1(regfile_rdata_1), .rdata_2(regfile_rdata_2), .rdata_2(regfile_rdata_3), + .spsr(regfile_spsr), .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 */), .inspsr(regfile_spsr), + .op0(decode_out_op0), .op1(decode_out_op1), .op2(decode_out_op2), + .carry(decode_out_carry), .outspsr(decode_out_spsr), + .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(stall_cause_memory), .flush(1'b0), + .inbubble(bubble_out_issue), .pc(pc_out_issue), .insn(insn_out_issue), + .cpsr(32'b0 /* XXX */), .spsr(decode_out_spsr), .op0(decode_out_op0), .op1(decode_out_op1), + .op2(decode_out_op2), .carry(decode_out_carry), + .outstall(stall_cause_execute), .outbubble(bubble_out_execute), + .write_reg(execute_out_write_reg), .write_num(execute_out_write_num), + .write_data(execute_out_write_data), + .jmp(jmp), .jmppc(jmppc), + .outpc(pc_out_execute), .outinsn(insn_out_execute), + .outop0(execute_out_op0), .outop1(execute_out_op1), .outop2(execute_out_op2)); + assign execute_out_backflush = jmp; + + Memory memory( + .clk(clk), .Nrst(1'b0), + /* stall? flush? */ + .busaddr(dcache_addr), .rd_req(dcache_rd_req), .wr_req(dcache_wr_req), + .rw_wait(dcache_rw_wait), .wr_data(dcache_wr_data), .rd_data(dcache_rd_data), + .st_read(regfile_read_3), .st_data(regfile_rdata_3), + .inbubble(bubble_out_execute), .pc(pc_out_execute), .insn(insn_out_execute), + .op0(execute_out_op0), .op1(execute_out_op1), .op2(execute_out_op2), + .write_reg(execute_out_write_reg), .write_num(execute_out_write_num), .write_data(execute_out_write_data), + .outstall(stall_cause_memory), .outbubble(bubble_out_memory), + .outpc(pc_out_memory), .outinsn(insn_out_memory), + .out_write_reg(memory_out_write_reg), .out_write_num(memory_out_write_num), + .out_write_data(memory_out_write_data), + .cp_req(cp_req), .cp_ack(cp_ack), .cp_busy(cp_busy), .cp_rnw(cp_rnw), .cp_read(cp_read), .cp_write(cp_write)); + + 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); + $display("%3d: EXEC: Stall: %d, Bubble: %d, Instruction: %08x, PC: %08x, Reg: %d, [%08x -> %d], Jmp: %d [%08x]", clockno, stall_cause_execute, bubble_out_execute, insn_out_execute, pc_out_execute, execute_out_write_reg, execute_out_write_data, execute_out_write_num, jmp, jmppc); + $display("%3d: MEMORY: Stall: %d, Bubble: %d, Instruction: %08x, PC: %08x, Reg: %d, [%08x -> %d]", clockno, stall_cause_memory, bubble_out_memory, insn_out_memory, pc_out_memory, memory_out_write_reg, memory_out_write_data, memory_out_write_num); + end endmodule