initial commit for open source NoC IP

rtl/util/pseudo_ram.sv

@@ -0,0 +1,61 @@
+`ifndef __PSEUDO_RAM_SV__
+`define __PSEUDO_RAM_SV__
+
+module pseudo_ram
+#(
+    parameter int unsigned WIDTH = 8,
+    parameter int unsigned DEPTH = 8
+)
+(
+    input logic                     we,
+    input logic [$clog2(DEPTH)-1:0] a,
+    input logic [WIDTH-1:0]         d,
+    output logic [WIDTH-1:0]        q,
+    
+    input logic                     rst,
+    input logic                     clk
+);
+
+logic [DEPTH-1:0][WIDTH-1:0] ram;
+
+logic [$clog2(DEPTH)-1:0] a_ff;
+logic                     we_ff;
+logic [WIDTH-1:0]         d_ff;
+
+//sync
+always_ff@(posedge clk) begin
+    if (rst) begin
+        a_ff <= 0;
+        d_ff <= 0;
+        we_ff <= 0;
+    end
+    else begin
+        a_ff <= a;
+        d_ff <= d;
+        we_ff <= we;
+    end
+end
+
+
+// read
+always_comb begin
+    q = 0;
+    if (!we_ff) begin
+        q = ram[a_ff];
+    end
+end
+
+// write
+always_ff@(posedge clk) begin
+    if (rst) begin
+        for (int i=0; i<DEPTH; i++) begin
+            ram[i] <= 0;
+        end
+    end
+    else if (we_ff) begin
+        ram[a_ff] <= d_ff;
+    end
+end
+endmodule
+
+`endif