Preliminary SRAM integration

pipelined/config/shared/wally-shared.vh

@@ -101,6 +101,8 @@
 `define NORMSHIFTSZ ((`DIVLEN+`NF+3) > (3*`NF+8) ? (`DIVLEN+`NF+3) : (3*`NF+9))
 `define CORRSHIFTSZ ((`DIVLEN+`NF+3) > (3*`NF+8) ? (`DIVLEN+`NF+3) : (3*`NF+6))
 
+`define USE_SRAM 1
+
 // Disable spurious Verilator warnings
 
 /* verilator lint_off STMTDLY */

pipelined/src/cache/sram1p1rw.sv

@@ -47,37 +47,33 @@ module sram1p1rw #(parameter DEPTH=128, WIDTH=256) (
   always_ff @(posedge clk)       AdrD <= Adr;
 
   genvar                          index;
-/* -----\/----- EXCLUDED -----\/-----
-  for(index = 0; index < WIDTH/8; index++) begin
-    always_ff @(posedge clk) begin
-      if (WriteEnable & ByteMask[index]) begin
-        StoredData[Adr][8*(index+1)-1:8*index] <= #1 CacheWriteData[8*(index+1)-1:8*index];
-      end
-    end
-  end
- -----/\----- EXCLUDED -----/\----- */
 
-  if (WIDTH%8 != 0) // handle msbs if not a multiple of 8
-    always_ff @(posedge clk) 
-      if (WriteEnable & ByteMask[WIDTH/8])
-        StoredData[Adr][WIDTH-1:WIDTH-WIDTH%8] <= #1 
-	  CacheWriteData[WIDTH-1:WIDTH-WIDTH%8];
-  
-  for(index = 0; index < WIDTH/8; index++) 
-    always_ff @(posedge clk)
-      if(WriteEnable & ByteMask[index])
-	StoredData[Adr][index*8 +: 8] <= #1 CacheWriteData[index*8 +: 8];
-/*  
-  // if not a multiple of 8, MSByte is not 8 bits long.
-  if(WIDTH%8 != 0) begin
-    always_ff @(posedge clk) begin
-      if (WriteEnable & ByteMask[WIDTH/8]) begin
-        StoredData[Adr][WIDTH-1:WIDTH-WIDTH%8] <= #1 CacheWriteData[WIDTH-1:WIDTH-WIDTH%8];
-      end
-    end
-  end 
-*/
-  assign ReadData = StoredData[AdrD];
+
+   if (`USE_SRAM == 1) begin
+    // 64 x 128-bit SRAM
+    logic [WIDTH-1:0] BitWriteMask;
+    for (index=0; index < WIDTH; index++) 
+      assign BitWriteMask[index] = ByteMask[index/8];
+    TS1N28HPCPSVTB64X128M4SWBASO sram(
+      .SLP(1'b0), .SD(1'b0), .CLK(clk), .CEB(1'b0), .WEB(~WriteEnable),
+      .CEBM(1'b0), .WEBM(1'b0), .AWT(1'b0), .A(Adr), .D(CacheWriteData), 
+      .BWEB(~BitWriteMask), .AM('b0), .DM('b0), .BWEBM('b0), .BIST(1'b0), .Q(ReadData)
+    );
+
+  end else begin 
+    if (WIDTH%8 != 0) // handle msbs if not a multiple of 8
+      always_ff @(posedge clk) 
+        if (WriteEnable & ByteMask[WIDTH/8])
+          StoredData[Adr][WIDTH-1:WIDTH-WIDTH%8] <= #1 
+      CacheWriteData[WIDTH-1:WIDTH-WIDTH%8];
+    
+    for(index = 0; index < WIDTH/8; index++) 
+      always_ff @(posedge clk)
+        if(WriteEnable & ByteMask[index])
+    StoredData[Adr][index*8 +: 8] <= #1 CacheWriteData[index*8 +: 8];
+
+    assign ReadData = StoredData[AdrD];
+  end
 endmodule
 
 

pipelined/src/cache/ts1n28hpcpsvtb64x128m4swbaso_180a_tt1v25c.sv

@@ -0,0 +1 @@
+/home/jstine/memory/ts1n28hpcpsvtb64x128m4swbaso_180a/VERILOG/ts1n28hpcpsvtb64x128m4swbaso_180a_tt1v25c.v