demo: initialize BRAM

8ec0e0af · Sebastien Bourdeauducq · 01c194ea · 8ec0e0af · 8ec0e0af
Commit 8ec0e0af authored Sep 08, 2011 by Sebastien Bourdeauducq
Hide whitespace changes
Inline Side-by-side

Showing with 23 additions and 2 deletions

system.v demo/boards/spec/rtl/system.v +5 -1

bram.v demo/cores/bram/rtl/bram.v +18 -1

No files found.
--- a/demo/boards/spec/rtl/system.v
+++ b/demo/boards/spec/rtl/system.v
@@ -362,7 +362,11 @@ lm32_top cpu(
 // BRAM/SRAM
 //---------------------------------------------------------------------------
 bram #(
-	.adr_width(14)
+	.adr_width(14),
+	.init0("../../../software/bios/bios.h1"),
+	.init1("../../../software/bios/bios.h2"),
+	.init2("../../../software/bios/bios.h3"),
+	.init3("../../../software/bios/bios.h4")
 ) bram (
 	.sys_clk(sys_clk),
 	.sys_rst(sys_rst),

--- a/demo/cores/bram/rtl/bram.v
+++ b/demo/cores/bram/rtl/bram.v
 /*
 * Milkymist SoC
 * Copyright (C) 2007, 2008, 2009 Sebastien Bourdeauducq
+ * Copyright (C) 2011 CERN
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
@@ -16,7 +17,11 @@
 */

 module bram #(
-	parameter adr_width = 11 // in bytes
+	parameter adr_width = 11, // in bytes
+	parameter init0 = "",
+	parameter init1 = "",
+	parameter init2 = "",
+	parameter init3 = ""
 ) (
 	input sys_clk,
 	input sys_rst,
@@ -45,6 +50,18 @@ reg [7:0] ram0 [0:word_depth-1];
 reg [7:0] ram1 [0:word_depth-1];
 reg [7:0] ram2 [0:word_depth-1];
 reg [7:0] ram3 [0:word_depth-1];
+
+initial begin
+	if(init0 != "")
+		$readmemh(init0, ram0);
+	if(init1 != "")
+		$readmemh(init1, ram1);
+	if(init2 != "")
+		$readmemh(init2, ram2);
+	if(init3 != "")
+		$readmemh(init3, ram3);
+end
+
 wire [word_width-1:0] adr;

 wire [7:0] ram0di;