System.v: Wire up DCache

[firearm.git] / system.v

diff --git a/system.v b/system.v
index a8a9ac4b9de0d363adba97b73ca7be59aada0983..da9d7017b58227bf5d2d2bfc5e1a6c28b6a48e2a 100644 (file)
--- a/system.v
+++ b/system.v
@@ -1,4 +1,5 @@
 `define BUS_ICACHE 0
+`define BUS_DCACHE 1
 
 module System(input clk);
        wire [7:0] bus_req;
@@ -9,23 +10,30 @@ module System(input clk);
        wire bus_rd, bus_wr;
        wire bus_ready;
 
-       wire bus_req_icache;    
-       assign bus_req = {7'b0, bus_req_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;
        
+       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;
+       assign bus_addr = bus_addr_icache | bus_addr_dcache;
        assign bus_rdata = bus_rdata_blockram;
-       assign bus_wdata = bus_wdata_icache;
-       assign bus_rd = bus_rd_icache;
-       assign bus_wr = bus_wr_icache;
+       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;
@@ -33,6 +41,11 @@ module System(input clk);
        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 stall_cause_issue;
        wire stall_cause_execute;
        
@@ -70,6 +83,15 @@ module System(input clk);
                .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),