X-Git-Url: http://git.joshuawise.com/firearm.git/blobdiff_plain/43e4332c59b61779d656eb95f058b36af031cbcb..dbf45af6b23216aa8fe299e334006fb3138d45f9:/system.v?ds=inline diff --git a/system.v b/system.v index b8fc48e..daa65ab 100644 --- a/system.v +++ b/system.v @@ -46,28 +46,43 @@ module System(input clk); 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 [31:0] decode_out_op0, decode_out_op1, decode_out_op2, decode_out_spsr, decode_out_cpsr; 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 regfile_write; + wire [3:0] regfile_write_reg; + wire [31:0] regfile_write_data; 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 [31:0] execute_out_cpsr, execute_out_spsr; + + wire jmp_out_execute, jmp_out_writeback; + wire [31:0] jmppc_out_execute, jmppc_out_writeback; + wire jmp = jmp_out_execute | jmp_out_writeback; + wire [31:0] jmppc = jmppc_out_execute | jmppc_out_writeback; wire memory_out_write_reg; wire [3:0] memory_out_write_num; wire [31:0] memory_out_write_data; + wire [31:0] memory_out_cpsr, memory_out_spsr; + + wire [31:0] writeback_out_cpsr, writeback_out_spsr; + + wire cp_ack_terminal; + wire cp_busy_terminal; + wire [31:0] cp_read_terminal; wire cp_req; - wire cp_ack = 0; - wire cp_busy = 0; + wire [31:0] cp_insn; + wire cp_ack = cp_ack_terminal; + wire cp_busy = cp_busy_terminal; wire cp_rnw; - wire [31:0] cp_read = 0; + wire [31:0] cp_read = cp_read_terminal; wire [31:0] cp_write; wire stall_cause_issue; @@ -87,6 +102,7 @@ module System(input clk); wire [31:0] pc_out_memory; wire execute_out_backflush; + wire writeback_out_backflush; BusArbiter busarbiter(.bus_req(bus_req), .bus_ack(bus_ack)); @@ -127,9 +143,9 @@ module System(input clk); Issue issue( .clk(clk), .Nrst(1'b1 /* XXX */), - .stall(stall_cause_execute), .flush(execute_out_backflush), + .stall(stall_cause_execute), .flush(execute_out_backflush | writeback_out_backflush), .inbubble(bubble_out_fetch), .insn(insn_out_fetch), - .inpc(pc_out_fetch), .cpsr(32'b0 /* XXX */), + .inpc(pc_out_fetch), .cpsr(writeback_out_cpsr), .outstall(stall_cause_issue), .outbubble(bubble_out_issue), .outpc(pc_out_issue), .outinsn(insn_out_issue)); @@ -137,44 +153,65 @@ module System(input clk); .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 */)); + .spsr(regfile_spsr), + .write(regfile_write), .write_reg(regfile_write_reg), .write_data(regfile_write_data)); Decode decode( .clk(clk), - .insn(insn_out_fetch), .inpc(pc_out_fetch), .incpsr(32'b0 /* XXX */), .inspsr(regfile_spsr), + .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), .outspsr(decode_out_spsr), + .carry(decode_out_carry), .outcpsr(decode_out_cpsr), .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), + .stall(stall_cause_memory), .flush(writeback_out_backflush), .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), + .cpsr(decode_out_cpsr), .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), + .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)); + .outop0(execute_out_op0), .outop1(execute_out_op1), .outop2(execute_out_op2), + .outcpsr(execute_out_cpsr), .outspsr(execute_out_spsr)); assign execute_out_backflush = jmp; + assign cp_insn = insn_out_execute; Memory memory( .clk(clk), .Nrst(1'b0), - /* stall? flush? */ + /* 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), .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)); + .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)); + + 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)); + + 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), + .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)); + assign writeback_out_backflush = jmp_out_writeback; reg [31:0] clockno = 0; always @(posedge clk) @@ -186,5 +223,6 @@ module System(input clk); $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); + $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 endmodule