Memory: Move all state machine code out to its own always block.
[firearm.git] / system.v
index d7fc62c..689a0b0 100644 (file)
--- a/system.v
+++ b/system.v
@@ -1,7 +1,15 @@
-`define BUS_ICACHE 0
-`define BUS_DCACHE 1
+`define BUS_ICACHE 1
+`define BUS_DCACHE 0
 
-module System(input clk);
+module System(input clk, input rst
+`ifdef verilator
+`else
+       , output wire [8:0] sys_odata,
+       input [8:0] sys_idata,
+       output wire sys_tookdata
+`endif
+       );
+       
        wire [7:0] bus_req;
        wire [7:0] bus_ack;
        wire [31:0] bus_addr;
@@ -12,7 +20,7 @@ module System(input clk);
 
        wire bus_req_icache;
        wire bus_req_dcache;
-       assign bus_req = {6'b0, bus_req_dcache, bus_req_icache};
+       assign bus_req = {6'b0, bus_req_icache, bus_req_dcache};
        wire bus_ack_icache = bus_ack[`BUS_ICACHE];
        wire bus_ack_dcache = bus_ack[`BUS_DCACHE];
        
@@ -60,6 +68,7 @@ module System(input clk);
        wire [31:0] execute_out_write_data;
        wire [31:0] execute_out_op0, execute_out_op1, execute_out_op2;
        wire [31:0] execute_out_cpsr, execute_out_spsr;
+       wire execute_out_cpsrup;
        
        wire jmp_out_execute, jmp_out_writeback;
        wire [31:0] jmppc_out_execute, jmppc_out_writeback;
@@ -70,6 +79,7 @@ module System(input clk);
        wire [3:0] memory_out_write_num;
        wire [31:0] memory_out_write_data;
        wire [31:0] memory_out_cpsr, memory_out_spsr;
+       wire memory_out_cpsrup;
        
        wire [31:0] writeback_out_cpsr, writeback_out_spsr;
 
@@ -125,7 +135,12 @@ module System(input clk);
                .bus_wdata(bus_wdata_dcache), .bus_rd(bus_rd_dcache),
                .bus_wr(bus_wr_dcache), .bus_ready(bus_ready));
 
-       BlockRAM blockram(
+`ifdef verilator
+       BigBlockRAM
+`else
+       BlockRAM
+`endif
+       blockram(
                .clk(clk),
                .bus_addr(bus_addr), .bus_rdata(bus_rdata_blockram),
                .bus_wdata(bus_wdata), .bus_rd(bus_rd), .bus_wr(bus_wr),
@@ -133,7 +148,7 @@ module System(input clk);
 
        Fetch fetch(
                .clk(clk),
-               .Nrst(1'b1 /* XXX */),
+               .Nrst(~rst),
                .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),
@@ -142,7 +157,7 @@ module System(input clk);
        
        Issue issue(
                .clk(clk),
-               .Nrst(1'b1 /* XXX */),
+               .Nrst(~rst),
                .stall(stall_cause_execute), .flush(execute_out_backflush | writeback_out_backflush),
                .inbubble(bubble_out_fetch), .insn(insn_out_fetch),
                .inpc(pc_out_fetch), .cpsr(writeback_out_cpsr),
@@ -150,14 +165,15 @@ module System(input clk);
                .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),
+               .clk(clk), .Nrst(~rst),
+               .read_0(regfile_read_0), .read_1(regfile_read_1), .read_2(regfile_read_2), .read_3(regfile_read_3),
+               .rdata_0(regfile_rdata_0), .rdata_1(regfile_rdata_1), .rdata_2(regfile_rdata_2), .rdata_3(regfile_rdata_3),
                .spsr(regfile_spsr),
                .write(regfile_write), .write_reg(regfile_write_reg), .write_data(regfile_write_data));
        
        Decode decode(
                .clk(clk),
+               .stall(stall_cause_execute),
                .insn(insn_out_fetch), .inpc(pc_out_fetch), .incpsr(writeback_out_cpsr), .inspsr(writeback_out_spsr),
                .op0(decode_out_op0), .op1(decode_out_op1), .op2(decode_out_op2),
                .carry(decode_out_carry), .outcpsr(decode_out_cpsr), .outspsr(decode_out_spsr),
@@ -165,7 +181,7 @@ module System(input clk);
                .rdata_0(regfile_rdata_0), .rdata_1(regfile_rdata_1), .rdata_2(regfile_rdata_2));
        
        Execute execute(
-               .clk(clk), .Nrst(1'b0),
+               .clk(clk), .Nrst(~rst),
                .stall(stall_cause_memory), .flush(writeback_out_backflush),
                .inbubble(bubble_out_issue), .pc(pc_out_issue), .insn(insn_out_issue),
                .cpsr(decode_out_cpsr), .spsr(decode_out_spsr), .op0(decode_out_op0), .op1(decode_out_op1),
@@ -176,37 +192,42 @@ module System(input clk);
                .jmp(jmp_out_execute), .jmppc(jmppc_out_execute),
                .outpc(pc_out_execute), .outinsn(insn_out_execute),
                .outop0(execute_out_op0), .outop1(execute_out_op1), .outop2(execute_out_op2),
-               .outcpsr(execute_out_cpsr), .outspsr(execute_out_spsr));
+               .outcpsr(execute_out_cpsr), .outspsr(execute_out_spsr), .outcpsrup(execute_out_cpsrup));
        assign execute_out_backflush = jmp;
        
        assign cp_insn = insn_out_execute;
        Memory memory(
-               .clk(clk), .Nrst(1'b0),
+               .clk(clk), .Nrst(~rst),
                /* stall? */ .flush(writeback_out_backflush),
                .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),
-               .spsr(execute_out_spsr), .cpsr(execute_out_cpsr),
+               .spsr(execute_out_spsr), .cpsr(execute_out_cpsr), .cpsrup(execute_out_cpsrup),
                .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),
-               .outcpsr(memory_out_cpsr), .outspsr(memory_out_spsr));
+               .outcpsr(memory_out_cpsr), .outspsr(memory_out_spsr), .outcpsrup(memory_out_cpsrup) /* XXX data_size */);
        
        Terminal terminal(      
                .clk(clk),
                .cp_req(cp_req), .cp_insn(cp_insn), .cp_ack(cp_ack_terminal), .cp_busy(cp_busy_terminal), .cp_rnw(cp_rnw),
-               .cp_read(cp_read_terminal), .cp_write(cp_write));
+               .cp_read(cp_read_terminal), .cp_write(cp_write)
+`ifdef verilator
+`else
+               , .sys_odata(sys_odata), .sys_tookdata(sys_tookdata), .sys_idata(sys_idata)
+`endif
+               );
        
        Writeback writeback(
                .clk(clk),
                .inbubble(bubble_out_memory),
                .write_reg(memory_out_write_reg), .write_num(memory_out_write_num), .write_data(memory_out_write_data),
-               .cpsr(memory_out_cpsr), .spsr(memory_out_spsr),
+               .cpsr(memory_out_cpsr), .spsr(memory_out_spsr), .cpsrup(memory_out_cpsrup),
                .regfile_write(regfile_write), .regfile_write_reg(regfile_write_reg), .regfile_write_data(regfile_write_data),
                .outcpsr(writeback_out_cpsr), .outspsr(writeback_out_spsr), 
                .jmp(jmp_out_writeback), .jmppc(jmppc_out_writeback));
@@ -219,8 +240,8 @@ module System(input clk);
                $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: DECODE:                      op0 %08x, op1 %08x, op2 %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_out_execute, jmppc_out_execute);
                $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);
                $display("%3d: WRITEB:                      CPSR %08x, SPSR %08x, Reg: %d [%08x -> %d], Jmp: %d [%08x]", clockno, writeback_out_cpsr, writeback_out_spsr, regfile_write, regfile_write_data, regfile_write_reg, jmp_out_writeback, jmppc_out_writeback);
        end
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