Add support for CellularRAM on Nexys2.
[firearm.git] / system.v
index 99680aa..97880c9 100644 (file)
--- a/system.v
+++ b/system.v
@@ -6,7 +6,12 @@ module System(input clk, input rst
 `else
        , output wire [8:0] sys_odata,
        input [8:0] sys_idata,
-       output wire sys_tookdata
+       output wire sys_tookdata,
+
+       output wire cr_nADV, cr_nCE, cr_nOE, cr_nWE, cr_CRE, cr_nLB, cr_nUB, cr_CLK,
+       inout wire [15:0] cr_DQ,
+       output wire [22:0] cr_A,
+       output wire st_nCE
 `endif
        );
        
@@ -34,15 +39,15 @@ module System(input clk, input rst
        wire bus_rd_dcache;
        wire bus_wr_dcache;
        
-       wire [31:0] bus_rdata_blockram;
-       wire bus_ready_blockram;
+       wire [31:0] bus_rdata_blockram, bus_rdata_cellularram;
+       wire bus_ready_blockram, bus_ready_cellularram;
        
        assign bus_addr = bus_addr_icache | bus_addr_dcache;
-       assign bus_rdata = bus_rdata_blockram;
+       assign bus_rdata = bus_rdata_blockram | bus_rdata_cellularram;
        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;
+       assign bus_ready = bus_ready_blockram | bus_ready_cellularram;
 
        wire [31:0] icache_rd_addr;
        wire icache_rd_req;
@@ -239,6 +244,40 @@ module System(input clk, input rst
                .bus_wdata(bus_wdata), .bus_rd(bus_rd), .bus_wr(bus_wr),
                .bus_ready(bus_ready_blockram));
 
+`ifdef verilator
+       assign bus_rdata_cellularram = 32'h00000000;
+       assign bus_ready_cellularram = 0;
+`else
+       /* CellularRAM AUTO_TEMPLATE (
+               .bus_rdata(bus_rdata_cellularram),
+               .bus_ready(bus_ready_cellularram),
+               );
+       */
+       CellularRAM cellularram(
+               /*AUTOINST*/
+                               // Outputs
+                               .bus_rdata      (bus_rdata_cellularram), // Templated
+                               .bus_ready      (bus_ready_cellularram), // Templated
+                               .cr_nADV        (cr_nADV),
+                               .cr_nCE         (cr_nCE),
+                               .cr_nOE         (cr_nOE),
+                               .cr_nWE         (cr_nWE),
+                               .cr_CRE         (cr_CRE),
+                               .cr_nLB         (cr_nLB),
+                               .cr_nUB         (cr_nUB),
+                               .cr_CLK         (cr_CLK),
+                               .cr_A           (cr_A[22:0]),
+                               .st_nCE         (st_nCE),
+                               // Inouts
+                               .cr_DQ          (cr_DQ[15:0]),
+                               // Inputs
+                               .clk            (clk),
+                               .bus_addr       (bus_addr[31:0]),
+                               .bus_wdata      (bus_wdata[31:0]),
+                               .bus_rd         (bus_rd),
+                               .bus_wr         (bus_wr));
+`endif
+
        /* Fetch AUTO_TEMPLATE (
                .jmp_0a(jmp),
                .jmppc_0a(jmppc),
@@ -382,7 +421,7 @@ module System(input clk, input rst
                        .carry_2a       (carry_2a));
        assign execute_out_backflush = jmp;
        
-       assign cp_insn = insn_out_execute;
+       assign cp_insn = insn_3a;
        /* stall? */
        /* Memory AUTO_TEMPLATE (
                .flush(writeback_out_backflush),
@@ -477,7 +516,7 @@ module System(input clk, input rst
                $display("%3d: FETCH:            Bubble: %d, Instruction: %08x, PC: %08x", clockno, bubble_1a, insn_1a, pc_1a);
                $display("%3d: ISSUE:  Stall: %d, Bubble: %d, Instruction: %08x, PC: %08x", clockno, stall_0a, bubble_2a, insn_2a, pc_2a);
                $display("%3d: DECODE:                      op0 %08x, op1 %08x, op2 %08x, carry %d", clockno, op0_2a, op1_2a, op2_2a, carry_2a);
-               $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: EXEC:   Stall: %d, Bubble: %d, Instruction: %08x, PC: %08x, Reg: %d, [%08x -> %d], Jmp: %d [%08x]", clockno, stall_cause_execute, bubble_3a, insn_3a, pc_3a, write_reg_3a, write_data_3a, write_num_3a, 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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